libuv 1.45.0, #include cleanup, probably something else.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4308 ed5197a5-7fde-0310-b194-c3ffbd925b24

deps/libuv/src/inet.c

@@ -17,12 +17,7 @@
 
 #include <stdio.h>
 #include <string.h>
-
-#if defined(_MSC_VER) && _MSC_VER < 1600
-# include "uv/stdint-msvc2008.h"
-#else
-# include <stdint.h>
-#endif
+#include <stdint.h>
 
 #include "uv.h"
 #include "uv-common.h"
@@ -135,7 +130,7 @@ static int inet_ntop6(const unsigned char *src, char *dst, size_t size) {
       tp += strlen(tp);
       break;
     }
-    tp += sprintf(tp, "%x", words[i]);
+    tp += snprintf(tp, sizeof tmp - (tp - tmp), "%x", words[i]);
   }
   /* Was it a trailing run of 0x00's? */
   if (best.base != -1 && (best.base + best.len) == ARRAY_SIZE(words))

deps/libuv/src/thread-common.c

@@ -0,0 +1,175 @@
+/* Copyright libuv project contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "uv-common.h"
+
+#include <stdlib.h>
+#ifndef _WIN32
+#include <pthread.h>
+#endif
+
+#if defined(PTHREAD_BARRIER_SERIAL_THREAD)
+STATIC_ASSERT(sizeof(uv_barrier_t) == sizeof(pthread_barrier_t));
+#endif
+
+/* Note: guard clauses should match uv_barrier_t's in include/uv/unix.h. */
+#if defined(_AIX) || \
+    defined(__OpenBSD__) || \
+    !defined(PTHREAD_BARRIER_SERIAL_THREAD)
+int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
+  int rc;
+#ifdef _WIN32
+  uv_barrier_t* b;
+  b = barrier;
+
+  if (barrier == NULL || count == 0)
+    return UV_EINVAL;
+#else
+  struct _uv_barrier* b;
+
+  if (barrier == NULL || count == 0)
+    return UV_EINVAL;
+
+  b = uv__malloc(sizeof(*b));
+  if (b == NULL)
+    return UV_ENOMEM;
+#endif
+
+  b->in = 0;
+  b->out = 0;
+  b->threshold = count;
+
+  rc = uv_mutex_init(&b->mutex);
+  if (rc != 0)
+    goto error2;
+
+  /* TODO(vjnash): remove these uv_cond_t casts in v2. */
+  rc = uv_cond_init((uv_cond_t*) &b->cond);
+  if (rc != 0)
+    goto error;
+
+#ifndef _WIN32
+  barrier->b = b;
+#endif
+  return 0;
+
+error:
+  uv_mutex_destroy(&b->mutex);
+error2:
+#ifndef _WIN32
+  uv__free(b);
+#endif
+  return rc;
+}
+
+
+int uv_barrier_wait(uv_barrier_t* barrier) {
+  int last;
+#ifdef _WIN32
+  uv_barrier_t* b;
+  b = barrier;
+#else
+  struct _uv_barrier* b;
+
+  if (barrier == NULL || barrier->b == NULL)
+    return UV_EINVAL;
+
+  b = barrier->b;
+#endif
+
+  uv_mutex_lock(&b->mutex);
+
+  while (b->out != 0)
+    uv_cond_wait((uv_cond_t*) &b->cond, &b->mutex);
+
+  if (++b->in == b->threshold) {
+    b->in = 0;
+    b->out = b->threshold;
+    uv_cond_broadcast((uv_cond_t*) &b->cond);
+  } else {
+    do
+      uv_cond_wait((uv_cond_t*) &b->cond, &b->mutex);
+    while (b->in != 0);
+  }
+
+  last = (--b->out == 0);
+  if (last)
+    uv_cond_broadcast((uv_cond_t*) &b->cond);
+
+  uv_mutex_unlock(&b->mutex);
+  return last;
+}
+
+
+void uv_barrier_destroy(uv_barrier_t* barrier) {
+#ifdef _WIN32
+  uv_barrier_t* b;
+  b = barrier;
+#else
+  struct _uv_barrier* b;
+  b = barrier->b;
+#endif
+
+  uv_mutex_lock(&b->mutex);
+
+  assert(b->in == 0);
+  while (b->out != 0)
+    uv_cond_wait((uv_cond_t*) &b->cond, &b->mutex);
+
+  if (b->in != 0)
+    abort();
+
+  uv_mutex_unlock(&b->mutex);
+  uv_mutex_destroy(&b->mutex);
+  uv_cond_destroy((uv_cond_t*) &b->cond);
+
+#ifndef  _WIN32
+  uv__free(barrier->b);
+  barrier->b = NULL;
+#endif
+}
+
+#else
+
+int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
+  return UV__ERR(pthread_barrier_init(barrier, NULL, count));
+}
+
+
+int uv_barrier_wait(uv_barrier_t* barrier) {
+  int rc;
+
+  rc = pthread_barrier_wait(barrier);
+  if (rc != 0)
+    if (rc != PTHREAD_BARRIER_SERIAL_THREAD)
+      abort();
+
+  return rc == PTHREAD_BARRIER_SERIAL_THREAD;
+}
+
+
+void uv_barrier_destroy(uv_barrier_t* barrier) {
+  if (pthread_barrier_destroy(barrier))
+    abort();
+}
+
+#endif

deps/libuv/src/threadpool.c

@@ -191,6 +191,7 @@ void uv__threadpool_cleanup(void) {
 
 
 static void init_threads(void) {
+  uv_thread_options_t config;
   unsigned int i;
   const char* val;
   uv_sem_t sem;
@@ -226,8 +227,11 @@ static void init_threads(void) {
   if (uv_sem_init(&sem, 0))
     abort();
 
+  config.flags = UV_THREAD_HAS_STACK_SIZE;
+  config.stack_size = 8u << 20;  /* 8 MB */
+
   for (i = 0; i < nthreads; i++)
-    if (uv_thread_create(threads + i, worker, &sem))
+    if (uv_thread_create_ex(threads + i, &config, worker, &sem))
       abort();
 
   for (i = 0; i < nthreads; i++)
@@ -271,9 +275,13 @@ void uv__work_submit(uv_loop_t* loop,
 }
 
 
+/* TODO(bnoordhuis) teach libuv how to cancel file operations
+ * that go through io_uring instead of the thread pool.
+ */
 static int uv__work_cancel(uv_loop_t* loop, uv_req_t* req, struct uv__work* w) {
   int cancelled;
 
+  uv_once(&once, init_once);  /* Ensure |mutex| is initialized. */
   uv_mutex_lock(&mutex);
   uv_mutex_lock(&w->loop->wq_mutex);
 
@@ -303,12 +311,15 @@ void uv__work_done(uv_async_t* handle) {
   QUEUE* q;
   QUEUE wq;
   int err;
+  int nevents;
 
   loop = container_of(handle, uv_loop_t, wq_async);
   uv_mutex_lock(&loop->wq_mutex);
   QUEUE_MOVE(&loop->wq, &wq);
   uv_mutex_unlock(&loop->wq_mutex);
 
+  nevents = 0;
+
   while (!QUEUE_EMPTY(&wq)) {
     q = QUEUE_HEAD(&wq);
     QUEUE_REMOVE(q);
@@ -316,6 +327,20 @@ void uv__work_done(uv_async_t* handle) {
     w = container_of(q, struct uv__work, wq);
     err = (w->work == uv__cancelled) ? UV_ECANCELED : 0;
     w->done(w, err);
+    nevents++;
+  }
+
+  /* This check accomplishes 2 things:
+   * 1. Even if the queue was empty, the call to uv__work_done() should count
+   *    as an event. Which will have been added by the event loop when
+   *    calling this callback.
+   * 2. Prevents accidental wrap around in case nevents == 0 events == 0.
+   */
+  if (nevents > 1) {
+    /* Subtract 1 to counter the call to uv__work_done(). */
+    uv__metrics_inc_events(loop, nevents - 1);
+    if (uv__get_internal_fields(loop)->current_timeout == 0)
+      uv__metrics_inc_events_waiting(loop, nevents - 1);
   }
 }
 

deps/libuv/src/unix/aix.c

@@ -131,6 +131,7 @@ int uv__io_check_fd(uv_loop_t* loop, int fd) {
 
 
 void uv__io_poll(uv_loop_t* loop, int timeout) {
+  uv__loop_internal_fields_t* lfields;
   struct pollfd events[1024];
   struct pollfd pqry;
   struct pollfd* pe;
@@ -154,6 +155,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     return;
   }
 
+  lfields = uv__get_internal_fields(loop);
+
   while (!QUEUE_EMPTY(&loop->watcher_queue)) {
     q = QUEUE_HEAD(&loop->watcher_queue);
     QUEUE_REMOVE(q);
@@ -217,7 +220,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
   base = loop->time;
   count = 48; /* Benchmarks suggest this gives the best throughput. */
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -232,6 +235,12 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     if (timeout != 0)
       uv__metrics_set_provider_entry_time(loop);
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     nfds = pollset_poll(loop->backend_fd,
                         events,
                         ARRAY_SIZE(events),
@@ -321,9 +330,11 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       nevents++;
     }
 
+    uv__metrics_inc_events(loop, nevents);
     if (reset_timeout != 0) {
       timeout = user_timeout;
       reset_timeout = 0;
+      uv__metrics_inc_events_waiting(loop, nevents);
     }
 
     if (have_signals != 0) {
@@ -389,6 +400,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 void uv_loadavg(double avg[3]) {
   perfstat_cpu_total_t ps_total;
   int result = perfstat_cpu_total(NULL, &ps_total, sizeof(ps_total), 1);
@@ -425,7 +441,7 @@ static char* uv__rawname(const char* cp, char (*dst)[FILENAME_MAX+1]) {
 static int uv__path_is_a_directory(char* filename) {
   struct stat statbuf;
 
-  if (stat(filename, &statbuf) < 0)
+  if (uv__stat(filename, &statbuf) < 0)
     return -1;  /* failed: not a directory, assume it is a file */
 
   if (statbuf.st_type == VDIR)

deps/libuv/src/unix/async.c

@@ -24,9 +24,9 @@
 
 #include "uv.h"
 #include "internal.h"
-#include "atomic-ops.h"
 
 #include <errno.h>
+#include <stdatomic.h>
 #include <stdio.h>  /* snprintf() */
 #include <assert.h>
 #include <stdlib.h>
@@ -40,6 +40,7 @@
 
 static void uv__async_send(uv_loop_t* loop);
 static int uv__async_start(uv_loop_t* loop);
+static void uv__cpu_relax(void);
 
 
 int uv_async_init(uv_loop_t* loop, uv_async_t* handle, uv_async_cb async_cb) {
@@ -52,6 +53,7 @@ int uv_async_init(uv_loop_t* loop, uv_async_t* handle, uv_async_cb async_cb) {
   uv__handle_init(loop, (uv_handle_t*)handle, UV_ASYNC);
   handle->async_cb = async_cb;
   handle->pending = 0;
+  handle->u.fd = 0; /* This will be used as a busy flag. */
 
   QUEUE_INSERT_TAIL(&loop->async_handles, &handle->queue);
   uv__handle_start(handle);
@@ -61,46 +63,54 @@ int uv_async_init(uv_loop_t* loop, uv_async_t* handle, uv_async_cb async_cb) {
 
 
 int uv_async_send(uv_async_t* handle) {
+  _Atomic int* pending;
+  _Atomic int* busy;
+
+  pending = (_Atomic int*) &handle->pending;
+  busy = (_Atomic int*) &handle->u.fd;
+
   /* Do a cheap read first. */
-  if (ACCESS_ONCE(int, handle->pending) != 0)
+  if (atomic_load_explicit(pending, memory_order_relaxed) != 0)
     return 0;
 
-  /* Tell the other thread we're busy with the handle. */
-  if (cmpxchgi(&handle->pending, 0, 1) != 0)
-    return 0;
+  /* Set the loop to busy. */
+  atomic_fetch_add(busy, 1);
 
   /* Wake up the other thread's event loop. */
-  uv__async_send(handle->loop);
+  if (atomic_exchange(pending, 1) == 0)
+    uv__async_send(handle->loop);
 
-  /* Tell the other thread we're done. */
-  if (cmpxchgi(&handle->pending, 1, 2) != 1)
-    abort();
+  /* Set the loop to not-busy. */
+  atomic_fetch_add(busy, -1);
 
   return 0;
 }
 
 
-/* Only call this from the event loop thread. */
-static int uv__async_spin(uv_async_t* handle) {
+/* Wait for the busy flag to clear before closing.
+ * Only call this from the event loop thread. */
+static void uv__async_spin(uv_async_t* handle) {
+  _Atomic int* pending;
+  _Atomic int* busy;
   int i;
-  int rc;
+
+  pending = (_Atomic int*) &handle->pending;
+  busy = (_Atomic int*) &handle->u.fd;
+
+  /* Set the pending flag first, so no new events will be added by other
+   * threads after this function returns. */
+  atomic_store(pending, 1);
 
   for (;;) {
-    /* 997 is not completely chosen at random. It's a prime number, acyclical
-     * by nature, and should therefore hopefully dampen sympathetic resonance.
+    /* 997 is not completely chosen at random. It's a prime number, acyclic by
+     * nature, and should therefore hopefully dampen sympathetic resonance.
      */
     for (i = 0; i < 997; i++) {
-      /* rc=0 -- handle is not pending.
-       * rc=1 -- handle is pending, other thread is still working with it.
-       * rc=2 -- handle is pending, other thread is done.
-       */
-      rc = cmpxchgi(&handle->pending, 2, 0);
-
-      if (rc != 1)
-        return rc;
+      if (atomic_load(busy) == 0)
+        return;
 
       /* Other thread is busy with this handle, spin until it's done. */
-      cpu_relax();
+      uv__cpu_relax();
     }
 
     /* Yield the CPU. We may have preempted the other thread while it's
@@ -125,6 +135,7 @@ static void uv__async_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   QUEUE queue;
   QUEUE* q;
   uv_async_t* h;
+  _Atomic int *pending;
 
   assert(w == &loop->async_io_watcher);
 
@@ -154,8 +165,10 @@ static void uv__async_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
     QUEUE_REMOVE(q);
     QUEUE_INSERT_TAIL(&loop->async_handles, q);
 
-    if (0 == uv__async_spin(h))
-      continue;  /* Not pending. */
+    /* Atomically fetch and clear pending flag */
+    pending = (_Atomic int*) &h->pending;
+    if (atomic_exchange(pending, 0) == 0)
+      continue;
 
     if (h->async_cb == NULL)
       continue;
@@ -227,20 +240,28 @@ static int uv__async_start(uv_loop_t* loop) {
 }
 
 
-int uv__async_fork(uv_loop_t* loop) {
-  if (loop->async_io_watcher.fd == -1) /* never started */
-    return 0;
-
-  uv__async_stop(loop);
-
-  return uv__async_start(loop);
-}
-
-
 void uv__async_stop(uv_loop_t* loop) {
+  QUEUE queue;
+  QUEUE* q;
+  uv_async_t* h;
+
   if (loop->async_io_watcher.fd == -1)
     return;
 
+  /* Make sure no other thread is accessing the async handle fd after the loop
+   * cleanup.
+   */
+  QUEUE_MOVE(&loop->async_handles, &queue);
+  while (!QUEUE_EMPTY(&queue)) {
+    q = QUEUE_HEAD(&queue);
+    h = QUEUE_DATA(q, uv_async_t, queue);
+
+    QUEUE_REMOVE(q);
+    QUEUE_INSERT_TAIL(&loop->async_handles, q);
+
+    uv__async_spin(h);
+  }
+
   if (loop->async_wfd != -1) {
     if (loop->async_wfd != loop->async_io_watcher.fd)
       uv__close(loop->async_wfd);
@@ -251,3 +272,58 @@ void uv__async_stop(uv_loop_t* loop) {
   uv__close(loop->async_io_watcher.fd);
   loop->async_io_watcher.fd = -1;
 }
+
+
+int uv__async_fork(uv_loop_t* loop) {
+  QUEUE queue;
+  QUEUE* q;
+  uv_async_t* h;
+
+  if (loop->async_io_watcher.fd == -1) /* never started */
+    return 0;
+
+  QUEUE_MOVE(&loop->async_handles, &queue);
+  while (!QUEUE_EMPTY(&queue)) {
+    q = QUEUE_HEAD(&queue);
+    h = QUEUE_DATA(q, uv_async_t, queue);
+
+    QUEUE_REMOVE(q);
+    QUEUE_INSERT_TAIL(&loop->async_handles, q);
+
+    /* The state of any thread that set pending is now likely corrupt in this
+     * child because the user called fork, so just clear these flags and move
+     * on. Calling most libc functions after `fork` is declared to be undefined
+     * behavior anyways, unless async-signal-safe, for multithreaded programs
+     * like libuv, and nothing interesting in pthreads is async-signal-safe.
+     */
+    h->pending = 0;
+    /* This is the busy flag, and we just abruptly lost all other threads. */
+    h->u.fd = 0;
+  }
+
+  /* Recreate these, since they still exist, but belong to the wrong pid now. */
+  if (loop->async_wfd != -1) {
+    if (loop->async_wfd != loop->async_io_watcher.fd)
+      uv__close(loop->async_wfd);
+    loop->async_wfd = -1;
+  }
+
+  uv__io_stop(loop, &loop->async_io_watcher, POLLIN);
+  uv__close(loop->async_io_watcher.fd);
+  loop->async_io_watcher.fd = -1;
+
+  return uv__async_start(loop);
+}
+
+
+static void uv__cpu_relax(void) {
+#if defined(__i386__) || defined(__x86_64__)
+  __asm__ __volatile__ ("rep; nop" ::: "memory");  /* a.k.a. PAUSE */
+#elif (defined(__arm__) && __ARM_ARCH >= 7) || defined(__aarch64__)
+  __asm__ __volatile__ ("yield" ::: "memory");
+#elif (defined(__ppc__) || defined(__ppc64__)) && defined(__APPLE__)
+  __asm volatile ("" : : : "memory");
+#elif !defined(__APPLE__) && (defined(__powerpc64__) || defined(__ppc64__) || defined(__PPC64__))
+  __asm__ __volatile__ ("or 1,1,1; or 2,2,2" ::: "memory");
+#endif
+}

deps/libuv/src/unix/atomic-ops.h

@@ -1,64 +0,0 @@
-/* Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#ifndef UV_ATOMIC_OPS_H_
-#define UV_ATOMIC_OPS_H_
-
-#include "internal.h"  /* UV_UNUSED */
-
-#if defined(__SUNPRO_C) || defined(__SUNPRO_CC)
-#include <atomic.h>
-#endif
-
-UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval));
-UV_UNUSED(static void cpu_relax(void));
-
-/* Prefer hand-rolled assembly over the gcc builtins because the latter also
- * issue full memory barriers.
- */
-UV_UNUSED(static int cmpxchgi(int* ptr, int oldval, int newval)) {
-#if defined(__i386__) || defined(__x86_64__)
-  int out;
-  __asm__ __volatile__ ("lock; cmpxchg %2, %1;"
-                        : "=a" (out), "+m" (*(volatile int*) ptr)
-                        : "r" (newval), "0" (oldval)
-                        : "memory");
-  return out;
-#elif defined(__MVS__)
-  /* Use hand-rolled assembly because codegen from builtin __plo_CSST results in
-   * a runtime bug.
-   */
-  __asm(" cs %0,%2,%1 \n " : "+r"(oldval), "+m"(*ptr) : "r"(newval) :);
-  return oldval;
-#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
-  return atomic_cas_uint((uint_t *)ptr, (uint_t)oldval, (uint_t)newval);
-#else
-  return __sync_val_compare_and_swap(ptr, oldval, newval);
-#endif
-}
-
-UV_UNUSED(static void cpu_relax(void)) {
-#if defined(__i386__) || defined(__x86_64__)
-  __asm__ __volatile__ ("rep; nop" ::: "memory");  /* a.k.a. PAUSE */
-#elif (defined(__arm__) && __ARM_ARCH >= 7) || defined(__aarch64__)
-  __asm__ __volatile__ ("yield" ::: "memory");
-#elif (defined(__ppc__) || defined(__ppc64__)) && defined(__APPLE__)
-  __asm volatile ("" : : : "memory");
-#elif !defined(__APPLE__) && (defined(__powerpc64__) || defined(__ppc64__) || defined(__PPC64__))
-  __asm__ __volatile__ ("or 1,1,1; or 2,2,2" ::: "memory");
-#endif
-}
-
-#endif  /* UV_ATOMIC_OPS_H_ */

deps/libuv/src/unix/core.c

@@ -41,12 +41,13 @@
 #include <sys/uio.h> /* writev */
 #include <sys/resource.h> /* getrusage */
 #include <pwd.h>
+#include <grp.h>
 #include <sys/utsname.h>
 #include <sys/time.h>
+#include <time.h> /* clock_gettime */
 
 #ifdef __sun
 # include <sys/filio.h>
-# include <sys/types.h>
 # include <sys/wait.h>
 #endif
 
@@ -66,13 +67,14 @@ extern char** environ;
 
 #if defined(__DragonFly__)      || \
     defined(__FreeBSD__)        || \
-    defined(__FreeBSD_kernel__) || \
     defined(__NetBSD__)         || \
     defined(__OpenBSD__)
 # include <sys/sysctl.h>
 # include <sys/filio.h>
 # include <sys/wait.h>
+# include <sys/param.h>
 # if defined(__FreeBSD__)
+#  include <sys/cpuset.h>
 #  define uv__accept4 accept4
 # endif
 # if defined(__NetBSD__)
@@ -107,6 +109,35 @@ STATIC_ASSERT(offsetof(uv_buf_t, base) == offsetof(struct iovec, iov_base));
 STATIC_ASSERT(offsetof(uv_buf_t, len) == offsetof(struct iovec, iov_len));
 
 
+/* https://github.com/libuv/libuv/issues/1674 */
+int uv_clock_gettime(uv_clock_id clock_id, uv_timespec64_t* ts) {
+  struct timespec t;
+  int r;
+
+  if (ts == NULL)
+    return UV_EFAULT;
+
+  switch (clock_id) {
+    default:
+      return UV_EINVAL;
+    case UV_CLOCK_MONOTONIC:
+      r = clock_gettime(CLOCK_MONOTONIC, &t);
+      break;
+    case UV_CLOCK_REALTIME:
+      r = clock_gettime(CLOCK_REALTIME, &t);
+      break;
+  }
+
+  if (r)
+    return UV__ERR(errno);
+
+  ts->tv_sec = t.tv_sec;
+  ts->tv_nsec = t.tv_nsec;
+
+  return 0;
+}
+
+
 uint64_t uv_hrtime(void) {
   return uv__hrtime(UV_CLOCK_PRECISE);
 }
@@ -232,10 +263,10 @@ int uv__getiovmax(void) {
 #if defined(IOV_MAX)
   return IOV_MAX;
 #elif defined(_SC_IOV_MAX)
-  static int iovmax_cached = -1;
+  static _Atomic int iovmax_cached = -1;
   int iovmax;
 
-  iovmax = uv__load_relaxed(&iovmax_cached);
+  iovmax = atomic_load_explicit(&iovmax_cached, memory_order_relaxed);
   if (iovmax != -1)
     return iovmax;
 
@@ -247,7 +278,7 @@ int uv__getiovmax(void) {
   if (iovmax == -1)
     iovmax = 1;
 
-  uv__store_relaxed(&iovmax_cached, iovmax);
+  atomic_store_explicit(&iovmax_cached, iovmax, memory_order_relaxed);
 
   return iovmax;
 #else
@@ -360,6 +391,7 @@ static int uv__backend_timeout(const uv_loop_t* loop) {
       (uv__has_active_handles(loop) || uv__has_active_reqs(loop)) &&
       QUEUE_EMPTY(&loop->pending_queue) &&
       QUEUE_EMPTY(&loop->idle_handles) &&
+      (loop->flags & UV_LOOP_REAP_CHILDREN) == 0 &&
       loop->closing_handles == NULL)
     return uv__next_timeout(loop);
   return 0;
@@ -388,10 +420,17 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
   if (!r)
     uv__update_time(loop);
 
-  while (r != 0 && loop->stop_flag == 0) {
-    uv__update_time(loop);
+  /* Maintain backwards compatibility by processing timers before entering the
+   * while loop for UV_RUN_DEFAULT. Otherwise timers only need to be executed
+   * once, which should be done after polling in order to maintain proper
+   * execution order of the conceptual event loop. */
+  if (mode == UV_RUN_DEFAULT) {
+    if (r)
+      uv__update_time(loop);
     uv__run_timers(loop);
+  }
 
+  while (r != 0 && loop->stop_flag == 0) {
     can_sleep =
         QUEUE_EMPTY(&loop->pending_queue) && QUEUE_EMPTY(&loop->idle_handles);
 
@@ -403,6 +442,8 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
     if ((mode == UV_RUN_ONCE && can_sleep) || mode == UV_RUN_DEFAULT)
       timeout = uv__backend_timeout(loop);
 
+    uv__metrics_inc_loop_count(loop);
+
     uv__io_poll(loop, timeout);
 
     /* Process immediate callbacks (e.g. write_cb) a small fixed number of
@@ -420,18 +461,8 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
     uv__run_check(loop);
     uv__run_closing_handles(loop);
 
-    if (mode == UV_RUN_ONCE) {
-      /* UV_RUN_ONCE implies forward progress: at least one callback must have
-       * been invoked when it returns. uv__io_poll() can return without doing
-       * I/O (meaning: no callbacks) when its timeout expires - which means we
-       * have pending timers that satisfy the forward progress constraint.
-       *
-       * UV_RUN_NOWAIT makes no guarantees about progress so it's omitted from
-       * the check.
-       */
-      uv__update_time(loop);
-      uv__run_timers(loop);
-    }
+    uv__update_time(loop);
+    uv__run_timers(loop);
 
     r = uv__loop_alive(loop);
     if (mode == UV_RUN_ONCE || mode == UV_RUN_NOWAIT)
@@ -867,11 +898,6 @@ void uv__io_init(uv__io_t* w, uv__io_cb cb, int fd) {
   w->fd = fd;
   w->events = 0;
   w->pevents = 0;
-
-#if defined(UV_HAVE_KQUEUE)
-  w->rcount = 0;
-  w->wcount = 0;
-#endif /* defined(UV_HAVE_KQUEUE) */
 }
 
 
@@ -991,6 +1017,15 @@ int uv_getrusage(uv_rusage_t* rusage) {
   rusage->ru_nivcsw = usage.ru_nivcsw;
 #endif
 
+  /* Most platforms report ru_maxrss in kilobytes; macOS and Solaris are
+   * the outliers because of course they are.
+   */
+#if defined(__APPLE__) && !TARGET_OS_IPHONE
+  rusage->ru_maxrss /= 1024;                  /* macOS reports bytes. */
+#elif defined(__sun)
+  rusage->ru_maxrss /= getpagesize() / 1024;  /* Solaris reports pages. */
+#endif
+
   return 0;
 }
 
@@ -1090,8 +1125,8 @@ int uv_os_homedir(char* buffer, size_t* size) {
   if (r != UV_ENOENT)
     return r;
 
-  /* HOME is not set, so call uv__getpwuid_r() */
-  r = uv__getpwuid_r(&pwd);
+  /* HOME is not set, so call uv_os_get_passwd() */
+  r = uv_os_get_passwd(&pwd);
 
   if (r != 0) {
     return r;
@@ -1164,11 +1199,10 @@ return_buffer:
 }
 
 
-int uv__getpwuid_r(uv_passwd_t* pwd) {
+static int uv__getpwuid_r(uv_passwd_t *pwd, uid_t uid) {
   struct passwd pw;
   struct passwd* result;
   char* buf;
-  uid_t uid;
   size_t bufsize;
   size_t name_size;
   size_t homedir_size;
@@ -1178,8 +1212,6 @@ int uv__getpwuid_r(uv_passwd_t* pwd) {
   if (pwd == NULL)
     return UV_EINVAL;
 
-  uid = geteuid();
-
   /* Calling sysconf(_SC_GETPW_R_SIZE_MAX) would get the suggested size, but it
    * is frequently 1024 or 4096, so we can just use that directly. The pwent
    * will not usually be large. */
@@ -1238,24 +1270,93 @@ int uv__getpwuid_r(uv_passwd_t* pwd) {
 }
 
 
-void uv_os_free_passwd(uv_passwd_t* pwd) {
-  if (pwd == NULL)
-    return;
+int uv_os_get_group(uv_group_t* grp, uv_uid_t gid) {
+  struct group gp;
+  struct group* result;
+  char* buf;
+  char* gr_mem;
+  size_t bufsize;
+  size_t name_size;
+  long members;
+  size_t mem_size;
+  int r;
 
-  /*
-    The memory for name, shell, and homedir are allocated in a single
-    uv__malloc() call. The base of the pointer is stored in pwd->username, so
-    that is the field that needs to be freed.
-  */
-  uv__free(pwd->username);
-  pwd->username = NULL;
-  pwd->shell = NULL;
-  pwd->homedir = NULL;
+  if (grp == NULL)
+    return UV_EINVAL;
+
+  /* Calling sysconf(_SC_GETGR_R_SIZE_MAX) would get the suggested size, but it
+   * is frequently 1024 or 4096, so we can just use that directly. The pwent
+   * will not usually be large. */
+  for (bufsize = 2000;; bufsize *= 2) {
+    buf = uv__malloc(bufsize);
+
+    if (buf == NULL)
+      return UV_ENOMEM;
+
+    do
+      r = getgrgid_r(gid, &gp, buf, bufsize, &result);
+    while (r == EINTR);
+
+    if (r != 0 || result == NULL)
+      uv__free(buf);
+
+    if (r != ERANGE)
+      break;
+  }
+
+  if (r != 0)
+    return UV__ERR(r);
+
+  if (result == NULL)
+    return UV_ENOENT;
+
+  /* Allocate memory for the groupname and members. */
+  name_size = strlen(gp.gr_name) + 1;
+  members = 0;
+  mem_size = sizeof(char*);
+  for (r = 0; gp.gr_mem[r] != NULL; r++) {
+    mem_size += strlen(gp.gr_mem[r]) + 1 + sizeof(char*);
+    members++;
+  }
+
+  gr_mem = uv__malloc(name_size + mem_size);
+  if (gr_mem == NULL) {
+    uv__free(buf);
+    return UV_ENOMEM;
+  }
+
+  /* Copy the members */
+  grp->members = (char**) gr_mem;
+  grp->members[members] = NULL;
+  gr_mem = (char*) &grp->members[members + 1];
+  for (r = 0; r < members; r++) {
+    grp->members[r] = gr_mem;
+    strcpy(gr_mem, gp.gr_mem[r]);
+    gr_mem += strlen(gr_mem) + 1;
+  }
+  assert(gr_mem == (char*)grp->members + mem_size);
+
+  /* Copy the groupname */
+  grp->groupname = gr_mem;
+  memcpy(grp->groupname, gp.gr_name, name_size);
+  gr_mem += name_size;
+
+  /* Copy the gid */
+  grp->gid = gp.gr_gid;
+
+  uv__free(buf);
+
+  return 0;
 }
 
 
 int uv_os_get_passwd(uv_passwd_t* pwd) {
-  return uv__getpwuid_r(pwd);
+  return uv__getpwuid_r(pwd, geteuid());
+}
+
+
+int uv_os_get_passwd2(uv_passwd_t* pwd, uv_uid_t uid) {
+  return uv__getpwuid_r(pwd, uid);
 }
 
 
@@ -1416,6 +1517,13 @@ uv_pid_t uv_os_getppid(void) {
   return getppid();
 }
 
+int uv_cpumask_size(void) {
+#if UV__CPU_AFFINITY_SUPPORTED
+  return CPU_SETSIZE;
+#else
+  return UV_ENOTSUP;
+#endif
+}
 
 int uv_os_getpriority(uv_pid_t pid, int* priority) {
   int r;

deps/libuv/src/unix/cygwin.c

@@ -51,3 +51,7 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
 uint64_t uv_get_constrained_memory(void) {
   return 0;  /* Memory constraints are unknown. */
 }
+
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}

deps/libuv/src/unix/darwin-stub.h

@@ -27,7 +27,6 @@
 struct CFArrayCallBacks;
 struct CFRunLoopSourceContext;
 struct FSEventStreamContext;
-struct CFRange;
 
 typedef double CFAbsoluteTime;
 typedef double CFTimeInterval;
@@ -43,23 +42,13 @@ typedef unsigned CFStringEncoding;
 typedef void* CFAllocatorRef;
 typedef void* CFArrayRef;
 typedef void* CFBundleRef;
-typedef void* CFDataRef;
 typedef void* CFDictionaryRef;
-typedef void* CFMutableDictionaryRef;
-typedef struct CFRange CFRange;
 typedef void* CFRunLoopRef;
 typedef void* CFRunLoopSourceRef;
 typedef void* CFStringRef;
 typedef void* CFTypeRef;
 typedef void* FSEventStreamRef;
 
-typedef uint32_t IOOptionBits;
-typedef unsigned int io_iterator_t;
-typedef unsigned int io_object_t;
-typedef unsigned int io_service_t;
-typedef unsigned int io_registry_entry_t;
-
-
 typedef void (*FSEventStreamCallback)(const FSEventStreamRef,
                                       void*,
                                       size_t,
@@ -80,11 +69,6 @@ struct FSEventStreamContext {
   void* pad[3];
 };
 
-struct CFRange {
-  CFIndex location;
-  CFIndex length;
-};
-
 static const CFStringEncoding kCFStringEncodingUTF8 = 0x8000100;
 static const OSStatus noErr = 0;
 

deps/libuv/src/unix/darwin.c

@@ -33,13 +33,10 @@
 #include <sys/sysctl.h>
 #include <unistd.h>  /* sysconf */
 
-#include "darwin-stub.h"
-
 static uv_once_t once = UV_ONCE_INIT;
 static uint64_t (*time_func)(void);
 static mach_timebase_info_data_t timebase;
 
-typedef unsigned char UInt8;
 
 int uv__platform_loop_init(uv_loop_t* loop) {
   loop->cf_state = NULL;
@@ -110,7 +107,7 @@ uint64_t uv_get_free_memory(void) {
 
   if (host_statistics(mach_host_self(), HOST_VM_INFO,
                       (host_info_t)&info, &count) != KERN_SUCCESS) {
-    return UV_EINVAL;  /* FIXME(bnoordhuis) Translate error. */
+    return 0;
   }
 
   return (uint64_t) info.free_count * sysconf(_SC_PAGESIZE);
@@ -123,7 +120,7 @@ uint64_t uv_get_total_memory(void) {
   size_t size = sizeof(info);
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info;
 }
@@ -134,6 +131,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 void uv_loadavg(double avg[3]) {
   struct loadavg info;
   size_t size = sizeof(info);
@@ -183,159 +185,17 @@ int uv_uptime(double* uptime) {
   return 0;
 }
 
-static int uv__get_cpu_speed(uint64_t* speed) {
-  /* IOKit */
-  void (*pIOObjectRelease)(io_object_t);
-  kern_return_t (*pIOMasterPort)(mach_port_t, mach_port_t*);
-  CFMutableDictionaryRef (*pIOServiceMatching)(const char*);
-  kern_return_t (*pIOServiceGetMatchingServices)(mach_port_t,
-                                                 CFMutableDictionaryRef,
-                                                 io_iterator_t*);
-  io_service_t (*pIOIteratorNext)(io_iterator_t);
-  CFTypeRef (*pIORegistryEntryCreateCFProperty)(io_registry_entry_t,
-                                                CFStringRef,
-                                                CFAllocatorRef,
-                                                IOOptionBits);
-
-  /* CoreFoundation */
-  CFStringRef (*pCFStringCreateWithCString)(CFAllocatorRef,
-                                            const char*,
-                                            CFStringEncoding);
-  CFStringEncoding (*pCFStringGetSystemEncoding)(void);
-  UInt8 *(*pCFDataGetBytePtr)(CFDataRef);
-  CFIndex (*pCFDataGetLength)(CFDataRef);
-  void (*pCFDataGetBytes)(CFDataRef, CFRange, UInt8*);
-  void (*pCFRelease)(CFTypeRef);
-
-  void* core_foundation_handle;
-  void* iokit_handle;
-  int err;
-
-  kern_return_t kr;
-  mach_port_t mach_port;
-  io_iterator_t it;
-  io_object_t service;
-
-  mach_port = 0;
-
-  err = UV_ENOENT;
-  core_foundation_handle = dlopen("/System/Library/Frameworks/"
-                                  "CoreFoundation.framework/"
-                                  "CoreFoundation",
-                                  RTLD_LAZY | RTLD_LOCAL);
-  iokit_handle = dlopen("/System/Library/Frameworks/IOKit.framework/"
-                        "IOKit",
-                        RTLD_LAZY | RTLD_LOCAL);
-
-  if (core_foundation_handle == NULL || iokit_handle == NULL)
-    goto out;
-
-#define V(handle, symbol)                                                     \
-  do {                                                                        \
-    *(void **)(&p ## symbol) = dlsym((handle), #symbol);                      \
-    if (p ## symbol == NULL)                                                  \
-      goto out;                                                               \
-  }                                                                           \
-  while (0)
-  V(iokit_handle, IOMasterPort);
-  V(iokit_handle, IOServiceMatching);
-  V(iokit_handle, IOServiceGetMatchingServices);
-  V(iokit_handle, IOIteratorNext);
-  V(iokit_handle, IOObjectRelease);
-  V(iokit_handle, IORegistryEntryCreateCFProperty);
-  V(core_foundation_handle, CFStringCreateWithCString);
-  V(core_foundation_handle, CFStringGetSystemEncoding);
-  V(core_foundation_handle, CFDataGetBytePtr);
-  V(core_foundation_handle, CFDataGetLength);
-  V(core_foundation_handle, CFDataGetBytes);
-  V(core_foundation_handle, CFRelease);
-#undef V
-
-#define S(s) pCFStringCreateWithCString(NULL, (s), kCFStringEncodingUTF8)
-
-  kr = pIOMasterPort(MACH_PORT_NULL, &mach_port);
-  assert(kr == KERN_SUCCESS);
-  CFMutableDictionaryRef classes_to_match
-      = pIOServiceMatching("IOPlatformDevice");
-  kr = pIOServiceGetMatchingServices(mach_port, classes_to_match, &it);
-  assert(kr == KERN_SUCCESS);
-  service = pIOIteratorNext(it);
-
-  CFStringRef device_type_str = S("device_type");
-  CFStringRef clock_frequency_str = S("clock-frequency");
-
-  while (service != 0) {
-    CFDataRef data;
-    data = pIORegistryEntryCreateCFProperty(service,
-                                            device_type_str,
-                                            NULL,
-                                            0);
-    if (data) {
-      const UInt8* raw = pCFDataGetBytePtr(data);
-      if (strncmp((char*)raw, "cpu", 3) == 0 ||
-          strncmp((char*)raw, "processor", 9) == 0) {
-        CFDataRef freq_ref;
-        freq_ref = pIORegistryEntryCreateCFProperty(service,
-                                                    clock_frequency_str,
-                                                    NULL,
-                                                    0);
-        if (freq_ref) {
-          const UInt8* freq_ref_ptr = pCFDataGetBytePtr(freq_ref);
-          CFIndex len = pCFDataGetLength(freq_ref);
-          if (len == 8)
-            memcpy(speed, freq_ref_ptr, 8);
-          else if (len == 4) {
-            uint32_t v;
-            memcpy(&v, freq_ref_ptr, 4);
-            *speed = v;
-          } else {
-            *speed = 0;
-          }
-
-          pCFRelease(freq_ref);
-          pCFRelease(data);
-          break;
-        }
-      }
-      pCFRelease(data);
-    }
-
-    service = pIOIteratorNext(it);
-  }
-
-  pIOObjectRelease(it);
-
-  err = 0;
-
-  if (device_type_str != NULL)
-    pCFRelease(device_type_str);
-  if (clock_frequency_str != NULL)
-    pCFRelease(clock_frequency_str);
-
-out:
-  if (core_foundation_handle != NULL)
-    dlclose(core_foundation_handle);
-
-  if (iokit_handle != NULL)
-    dlclose(iokit_handle);
-
-  mach_port_deallocate(mach_task_self(), mach_port);
-
-  return err;
-}
-
 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
   unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
                multiplier = ((uint64_t)1000L / ticks);
   char model[512];
+  uint64_t cpuspeed;
   size_t size;
   unsigned int i;
   natural_t numcpus;
   mach_msg_type_number_t msg_type;
   processor_cpu_load_info_data_t *info;
   uv_cpu_info_t* cpu_info;
-  uint64_t cpuspeed;
-  int err;
 
   size = sizeof(model);
   if (sysctlbyname("machdep.cpu.brand_string", &model, &size, NULL, 0) &&
@@ -343,9 +203,13 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
     return UV__ERR(errno);
   }
 
-  err = uv__get_cpu_speed(&cpuspeed);
-  if (err < 0)
-    return err;
+  cpuspeed = 0;
+  size = sizeof(cpuspeed);
+  sysctlbyname("hw.cpufrequency", &cpuspeed, &size, NULL, 0);
+  if (cpuspeed == 0)
+    /* If sysctl hw.cputype == CPU_TYPE_ARM64, the correct value is unavailable
+     * from Apple, but we can hard-code it here to a plausible value. */
+    cpuspeed = 2400000000;
 
   if (host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &numcpus,
                           (processor_info_array_t*)&info,

deps/libuv/src/unix/epoll.c

@@ -1,422 +0,0 @@
-/* Copyright libuv contributors. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include "uv.h"
-#include "internal.h"
-#include <errno.h>
-#include <sys/epoll.h>
-
-int uv__epoll_init(uv_loop_t* loop) {
-  int fd;
-  fd = epoll_create1(O_CLOEXEC);
-
-  /* epoll_create1() can fail either because it's not implemented (old kernel)
-   * or because it doesn't understand the O_CLOEXEC flag.
-   */
-  if (fd == -1 && (errno == ENOSYS || errno == EINVAL)) {
-    fd = epoll_create(256);
-
-    if (fd != -1)
-      uv__cloexec(fd, 1);
-  }
-
-  loop->backend_fd = fd;
-  if (fd == -1)
-    return UV__ERR(errno);
-
-  return 0;
-}
-
-
-void uv__platform_invalidate_fd(uv_loop_t* loop, int fd) {
-  struct epoll_event* events;
-  struct epoll_event dummy;
-  uintptr_t i;
-  uintptr_t nfds;
-
-  assert(loop->watchers != NULL);
-  assert(fd >= 0);
-
-  events = (struct epoll_event*) loop->watchers[loop->nwatchers];
-  nfds = (uintptr_t) loop->watchers[loop->nwatchers + 1];
-  if (events != NULL)
-    /* Invalidate events with same file descriptor */
-    for (i = 0; i < nfds; i++)
-      if (events[i].data.fd == fd)
-        events[i].data.fd = -1;
-
-  /* Remove the file descriptor from the epoll.
-   * This avoids a problem where the same file description remains open
-   * in another process, causing repeated junk epoll events.
-   *
-   * We pass in a dummy epoll_event, to work around a bug in old kernels.
-   */
-  if (loop->backend_fd >= 0) {
-    /* Work around a bug in kernels 3.10 to 3.19 where passing a struct that
-     * has the EPOLLWAKEUP flag set generates spurious audit syslog warnings.
-     */
-    memset(&dummy, 0, sizeof(dummy));
-    epoll_ctl(loop->backend_fd, EPOLL_CTL_DEL, fd, &dummy);
-  }
-}
-
-
-int uv__io_check_fd(uv_loop_t* loop, int fd) {
-  struct epoll_event e;
-  int rc;
-
-  memset(&e, 0, sizeof(e));
-  e.events = POLLIN;
-  e.data.fd = -1;
-
-  rc = 0;
-  if (epoll_ctl(loop->backend_fd, EPOLL_CTL_ADD, fd, &e))
-    if (errno != EEXIST)
-      rc = UV__ERR(errno);
-
-  if (rc == 0)
-    if (epoll_ctl(loop->backend_fd, EPOLL_CTL_DEL, fd, &e))
-      abort();
-
-  return rc;
-}
-
-
-void uv__io_poll(uv_loop_t* loop, int timeout) {
-  /* A bug in kernels < 2.6.37 makes timeouts larger than ~30 minutes
-   * effectively infinite on 32 bits architectures.  To avoid blocking
-   * indefinitely, we cap the timeout and poll again if necessary.
-   *
-   * Note that "30 minutes" is a simplification because it depends on
-   * the value of CONFIG_HZ.  The magic constant assumes CONFIG_HZ=1200,
-   * that being the largest value I have seen in the wild (and only once.)
-   */
-  static const int max_safe_timeout = 1789569;
-  static int no_epoll_pwait_cached;
-  static int no_epoll_wait_cached;
-  int no_epoll_pwait;
-  int no_epoll_wait;
-  struct epoll_event events[1024];
-  struct epoll_event* pe;
-  struct epoll_event e;
-  int real_timeout;
-  QUEUE* q;
-  uv__io_t* w;
-  sigset_t sigset;
-  uint64_t sigmask;
-  uint64_t base;
-  int have_signals;
-  int nevents;
-  int count;
-  int nfds;
-  int fd;
-  int op;
-  int i;
-  int user_timeout;
-  int reset_timeout;
-
-  if (loop->nfds == 0) {
-    assert(QUEUE_EMPTY(&loop->watcher_queue));
-    return;
-  }
-
-  memset(&e, 0, sizeof(e));
-
-  while (!QUEUE_EMPTY(&loop->watcher_queue)) {
-    q = QUEUE_HEAD(&loop->watcher_queue);
-    QUEUE_REMOVE(q);
-    QUEUE_INIT(q);
-
-    w = QUEUE_DATA(q, uv__io_t, watcher_queue);
-    assert(w->pevents != 0);
-    assert(w->fd >= 0);
-    assert(w->fd < (int) loop->nwatchers);
-
-    e.events = w->pevents;
-    e.data.fd = w->fd;
-
-    if (w->events == 0)
-      op = EPOLL_CTL_ADD;
-    else
-      op = EPOLL_CTL_MOD;
-
-    /* XXX Future optimization: do EPOLL_CTL_MOD lazily if we stop watching
-     * events, skip the syscall and squelch the events after epoll_wait().
-     */
-    if (epoll_ctl(loop->backend_fd, op, w->fd, &e)) {
-      if (errno != EEXIST)
-        abort();
-
-      assert(op == EPOLL_CTL_ADD);
-
-      /* We've reactivated a file descriptor that's been watched before. */
-      if (epoll_ctl(loop->backend_fd, EPOLL_CTL_MOD, w->fd, &e))
-        abort();
-    }
-
-    w->events = w->pevents;
-  }
-
-  sigmask = 0;
-  if (loop->flags & UV_LOOP_BLOCK_SIGPROF) {
-    sigemptyset(&sigset);
-    sigaddset(&sigset, SIGPROF);
-    sigmask |= 1 << (SIGPROF - 1);
-  }
-
-  assert(timeout >= -1);
-  base = loop->time;
-  count = 48; /* Benchmarks suggest this gives the best throughput. */
-  real_timeout = timeout;
-
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
-    reset_timeout = 1;
-    user_timeout = timeout;
-    timeout = 0;
-  } else {
-    reset_timeout = 0;
-    user_timeout = 0;
-  }
-
-  /* You could argue there is a dependency between these two but
-   * ultimately we don't care about their ordering with respect
-   * to one another. Worst case, we make a few system calls that
-   * could have been avoided because another thread already knows
-   * they fail with ENOSYS. Hardly the end of the world.
-   */
-  no_epoll_pwait = uv__load_relaxed(&no_epoll_pwait_cached);
-  no_epoll_wait = uv__load_relaxed(&no_epoll_wait_cached);
-
-  for (;;) {
-    /* Only need to set the provider_entry_time if timeout != 0. The function
-     * will return early if the loop isn't configured with UV_METRICS_IDLE_TIME.
-     */
-    if (timeout != 0)
-      uv__metrics_set_provider_entry_time(loop);
-
-    /* See the comment for max_safe_timeout for an explanation of why
-     * this is necessary.  Executive summary: kernel bug workaround.
-     */
-    if (sizeof(int32_t) == sizeof(long) && timeout >= max_safe_timeout)
-      timeout = max_safe_timeout;
-
-    if (sigmask != 0 && no_epoll_pwait != 0)
-      if (pthread_sigmask(SIG_BLOCK, &sigset, NULL))
-        abort();
-
-    if (no_epoll_wait != 0 || (sigmask != 0 && no_epoll_pwait == 0)) {
-      nfds = epoll_pwait(loop->backend_fd,
-                         events,
-                         ARRAY_SIZE(events),
-                         timeout,
-                         &sigset);
-      if (nfds == -1 && errno == ENOSYS) {
-        uv__store_relaxed(&no_epoll_pwait_cached, 1);
-        no_epoll_pwait = 1;
-      }
-    } else {
-      nfds = epoll_wait(loop->backend_fd,
-                        events,
-                        ARRAY_SIZE(events),
-                        timeout);
-      if (nfds == -1 && errno == ENOSYS) {
-        uv__store_relaxed(&no_epoll_wait_cached, 1);
-        no_epoll_wait = 1;
-      }
-    }
-
-    if (sigmask != 0 && no_epoll_pwait != 0)
-      if (pthread_sigmask(SIG_UNBLOCK, &sigset, NULL))
-        abort();
-
-    /* Update loop->time unconditionally. It's tempting to skip the update when
-     * timeout == 0 (i.e. non-blocking poll) but there is no guarantee that the
-     * operating system didn't reschedule our process while in the syscall.
-     */
-    SAVE_ERRNO(uv__update_time(loop));
-
-    if (nfds == 0) {
-      assert(timeout != -1);
-
-      if (reset_timeout != 0) {
-        timeout = user_timeout;
-        reset_timeout = 0;
-      }
-
-      if (timeout == -1)
-        continue;
-
-      if (timeout == 0)
-        return;
-
-      /* We may have been inside the system call for longer than |timeout|
-       * milliseconds so we need to update the timestamp to avoid drift.
-       */
-      goto update_timeout;
-    }
-
-    if (nfds == -1) {
-      if (errno == ENOSYS) {
-        /* epoll_wait() or epoll_pwait() failed, try the other system call. */
-        assert(no_epoll_wait == 0 || no_epoll_pwait == 0);
-        continue;
-      }
-
-      if (errno != EINTR)
-        abort();
-
-      if (reset_timeout != 0) {
-        timeout = user_timeout;
-        reset_timeout = 0;
-      }
-
-      if (timeout == -1)
-        continue;
-
-      if (timeout == 0)
-        return;
-
-      /* Interrupted by a signal. Update timeout and poll again. */
-      goto update_timeout;
-    }
-
-    have_signals = 0;
-    nevents = 0;
-
-    {
-      /* Squelch a -Waddress-of-packed-member warning with gcc >= 9. */
-      union {
-        struct epoll_event* events;
-        uv__io_t* watchers;
-      } x;
-
-      x.events = events;
-      assert(loop->watchers != NULL);
-      loop->watchers[loop->nwatchers] = x.watchers;
-      loop->watchers[loop->nwatchers + 1] = (void*) (uintptr_t) nfds;
-    }
-
-    for (i = 0; i < nfds; i++) {
-      pe = events + i;
-      fd = pe->data.fd;
-
-      /* Skip invalidated events, see uv__platform_invalidate_fd */
-      if (fd == -1)
-        continue;
-
-      assert(fd >= 0);
-      assert((unsigned) fd < loop->nwatchers);
-
-      w = loop->watchers[fd];
-
-      if (w == NULL) {
-        /* File descriptor that we've stopped watching, disarm it.
-         *
-         * Ignore all errors because we may be racing with another thread
-         * when the file descriptor is closed.
-         */
-        epoll_ctl(loop->backend_fd, EPOLL_CTL_DEL, fd, pe);
-        continue;
-      }
-
-      /* Give users only events they're interested in. Prevents spurious
-       * callbacks when previous callback invocation in this loop has stopped
-       * the current watcher. Also, filters out events that users has not
-       * requested us to watch.
-       */
-      pe->events &= w->pevents | POLLERR | POLLHUP;
-
-      /* Work around an epoll quirk where it sometimes reports just the
-       * EPOLLERR or EPOLLHUP event.  In order to force the event loop to
-       * move forward, we merge in the read/write events that the watcher
-       * is interested in; uv__read() and uv__write() will then deal with
-       * the error or hangup in the usual fashion.
-       *
-       * Note to self: happens when epoll reports EPOLLIN|EPOLLHUP, the user
-       * reads the available data, calls uv_read_stop(), then sometime later
-       * calls uv_read_start() again.  By then, libuv has forgotten about the
-       * hangup and the kernel won't report EPOLLIN again because there's
-       * nothing left to read.  If anything, libuv is to blame here.  The
-       * current hack is just a quick bandaid; to properly fix it, libuv
-       * needs to remember the error/hangup event.  We should get that for
-       * free when we switch over to edge-triggered I/O.
-       */
-      if (pe->events == POLLERR || pe->events == POLLHUP)
-        pe->events |=
-          w->pevents & (POLLIN | POLLOUT | UV__POLLRDHUP | UV__POLLPRI);
-
-      if (pe->events != 0) {
-        /* Run signal watchers last.  This also affects child process watchers
-         * because those are implemented in terms of signal watchers.
-         */
-        if (w == &loop->signal_io_watcher) {
-          have_signals = 1;
-        } else {
-          uv__metrics_update_idle_time(loop);
-          w->cb(loop, w, pe->events);
-        }
-
-        nevents++;
-      }
-    }
-
-    if (reset_timeout != 0) {
-      timeout = user_timeout;
-      reset_timeout = 0;
-    }
-
-    if (have_signals != 0) {
-      uv__metrics_update_idle_time(loop);
-      loop->signal_io_watcher.cb(loop, &loop->signal_io_watcher, POLLIN);
-    }
-
-    loop->watchers[loop->nwatchers] = NULL;
-    loop->watchers[loop->nwatchers + 1] = NULL;
-
-    if (have_signals != 0)
-      return;  /* Event loop should cycle now so don't poll again. */
-
-    if (nevents != 0) {
-      if (nfds == ARRAY_SIZE(events) && --count != 0) {
-        /* Poll for more events but don't block this time. */
-        timeout = 0;
-        continue;
-      }
-      return;
-    }
-
-    if (timeout == 0)
-      return;
-
-    if (timeout == -1)
-      continue;
-
-update_timeout:
-    assert(timeout > 0);
-
-    real_timeout -= (loop->time - base);
-    if (real_timeout <= 0)
-      return;
-
-    timeout = real_timeout;
-  }
-}
-

deps/libuv/src/unix/freebsd.c

@@ -91,7 +91,7 @@ uint64_t uv_get_free_memory(void) {
   size_t size = sizeof(freecount);
 
   if (sysctlbyname("vm.stats.vm.v_free_count", &freecount, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) freecount * sysconf(_SC_PAGESIZE);
 
@@ -105,7 +105,7 @@ uint64_t uv_get_total_memory(void) {
   size_t size = sizeof(info);
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info;
 }
@@ -116,6 +116,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 void uv_loadavg(double avg[3]) {
   struct loadavg info;
   size_t size = sizeof(info);
@@ -264,30 +269,6 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
 }
 
 
-int uv__sendmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
-#if __FreeBSD__ >= 11 && !defined(__DragonFly__)
-  return sendmmsg(fd,
-                  (struct mmsghdr*) mmsg,
-                  vlen,
-                  0 /* flags */);
-#else
-  return errno = ENOSYS, -1;
-#endif
-}
-
-
-int uv__recvmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
-#if __FreeBSD__ >= 11 && !defined(__DragonFly__)
-  return recvmmsg(fd,
-                  (struct mmsghdr*) mmsg,
-                  vlen,
-                  0 /* flags */,
-                  NULL /* timeout */);
-#else
-  return errno = ENOSYS, -1;
-#endif
-}
-
 ssize_t
 uv__fs_copy_file_range(int fd_in,
                        off_t* off_in,

deps/libuv/src/unix/fs.c

@@ -48,7 +48,6 @@
 
 #if defined(__DragonFly__)        ||                                      \
     defined(__FreeBSD__)          ||                                      \
-    defined(__FreeBSD_kernel__)   ||                                      \
     defined(__OpenBSD__)          ||                                      \
     defined(__NetBSD__)
 # define HAVE_PREADV 1
@@ -57,10 +56,11 @@
 #endif
 
 #if defined(__linux__)
-# include "sys/utsname.h"
+# include <sys/sendfile.h>
+# include <sys/utsname.h>
 #endif
 
-#if defined(__linux__) || defined(__sun)
+#if defined(__sun)
 # include <sys/sendfile.h>
 # include <sys/sysmacros.h>
 #endif
@@ -79,7 +79,6 @@
 #if defined(__APPLE__)            ||                                      \
     defined(__DragonFly__)        ||                                      \
     defined(__FreeBSD__)          ||                                      \
-    defined(__FreeBSD_kernel__)   ||                                      \
     defined(__OpenBSD__)          ||                                      \
     defined(__NetBSD__)
 # include <sys/param.h>
@@ -256,7 +255,6 @@ static ssize_t uv__fs_futime(uv_fs_t* req) {
 #elif defined(__APPLE__)                                                      \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
-    || defined(__FreeBSD_kernel__)                                            \
     || defined(__NetBSD__)                                                    \
     || defined(__OpenBSD__)                                                   \
     || defined(__sun)
@@ -311,7 +309,7 @@ static int uv__fs_mkstemp(uv_fs_t* req) {
   static uv_once_t once = UV_ONCE_INIT;
   int r;
 #ifdef O_CLOEXEC
-  static int no_cloexec_support;
+  static _Atomic int no_cloexec_support;
 #endif
   static const char pattern[] = "XXXXXX";
   static const size_t pattern_size = sizeof(pattern) - 1;
@@ -336,7 +334,8 @@ static int uv__fs_mkstemp(uv_fs_t* req) {
   uv_once(&once, uv__mkostemp_initonce);
 
 #ifdef O_CLOEXEC
-  if (uv__load_relaxed(&no_cloexec_support) == 0 && uv__mkostemp != NULL) {
+  if (atomic_load_explicit(&no_cloexec_support, memory_order_relaxed) == 0 &&
+      uv__mkostemp != NULL) {
     r = uv__mkostemp(path, O_CLOEXEC);
 
     if (r >= 0)
@@ -349,7 +348,7 @@ static int uv__fs_mkstemp(uv_fs_t* req) {
 
     /* We set the static variable so that next calls don't even
        try to use mkostemp. */
-    uv__store_relaxed(&no_cloexec_support, 1);
+    atomic_store_explicit(&no_cloexec_support, 1, memory_order_relaxed);
   }
 #endif  /* O_CLOEXEC */
 
@@ -459,7 +458,7 @@ static ssize_t uv__fs_preadv(uv_file fd,
 
 static ssize_t uv__fs_read(uv_fs_t* req) {
 #if defined(__linux__)
-  static int no_preadv;
+  static _Atomic int no_preadv;
 #endif
   unsigned int iovmax;
   ssize_t result;
@@ -483,19 +482,19 @@ static ssize_t uv__fs_read(uv_fs_t* req) {
     result = preadv(req->file, (struct iovec*) req->bufs, req->nbufs, req->off);
 #else
 # if defined(__linux__)
-    if (uv__load_relaxed(&no_preadv)) retry:
+    if (atomic_load_explicit(&no_preadv, memory_order_relaxed)) retry:
 # endif
     {
       result = uv__fs_preadv(req->file, req->bufs, req->nbufs, req->off);
     }
 # if defined(__linux__)
     else {
-      result = uv__preadv(req->file,
-                          (struct iovec*)req->bufs,
-                          req->nbufs,
-                          req->off);
+      result = preadv(req->file,
+                      (struct iovec*) req->bufs,
+                      req->nbufs,
+                      req->off);
       if (result == -1 && errno == ENOSYS) {
-        uv__store_relaxed(&no_preadv, 1);
+        atomic_store_explicit(&no_preadv, 1, memory_order_relaxed);
         goto retry;
       }
     }
@@ -516,7 +515,7 @@ done:
   if (result == -1 && errno == EOPNOTSUPP) {
     struct stat buf;
     ssize_t rc;
-    rc = fstat(req->file, &buf);
+    rc = uv__fstat(req->file, &buf);
     if (rc == 0 && S_ISDIR(buf.st_mode)) {
       errno = EISDIR;
     }
@@ -527,19 +526,12 @@ done:
 }
 
 
-#if defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_8)
-#define UV_CONST_DIRENT uv__dirent_t
-#else
-#define UV_CONST_DIRENT const uv__dirent_t
-#endif
-
-
-static int uv__fs_scandir_filter(UV_CONST_DIRENT* dent) {
+static int uv__fs_scandir_filter(const uv__dirent_t* dent) {
   return strcmp(dent->d_name, ".") != 0 && strcmp(dent->d_name, "..") != 0;
 }
 
 
-static int uv__fs_scandir_sort(UV_CONST_DIRENT** a, UV_CONST_DIRENT** b) {
+static int uv__fs_scandir_sort(const uv__dirent_t** a, const uv__dirent_t** b) {
   return strcmp((*a)->d_name, (*b)->d_name);
 }
 
@@ -715,7 +707,7 @@ static ssize_t uv__fs_readlink(uv_fs_t* req) {
   /* We may not have a real PATH_MAX.  Read size of link.  */
   struct stat st;
   int ret;
-  ret = lstat(req->path, &st);
+  ret = uv__lstat(req->path, &st);
   if (ret != 0)
     return -1;
   if (!S_ISLNK(st.st_mode)) {
@@ -908,14 +900,14 @@ out:
 
 #ifdef __linux__
 static unsigned uv__kernel_version(void) {
-  static unsigned cached_version;
+  static _Atomic unsigned cached_version;
   struct utsname u;
   unsigned version;
   unsigned major;
   unsigned minor;
   unsigned patch;
 
-  version = uv__load_relaxed(&cached_version);
+  version = atomic_load_explicit(&cached_version, memory_order_relaxed);
   if (version != 0)
     return version;
 
@@ -926,7 +918,7 @@ static unsigned uv__kernel_version(void) {
     return 0;
 
   version = major * 65536 + minor * 256 + patch;
-  uv__store_relaxed(&cached_version, version);
+  atomic_store_explicit(&cached_version, version, memory_order_relaxed);
 
   return version;
 }
@@ -968,10 +960,10 @@ static int uv__is_cifs_or_smb(int fd) {
 
 static ssize_t uv__fs_try_copy_file_range(int in_fd, off_t* off,
                                           int out_fd, size_t len) {
-  static int no_copy_file_range_support;
+  static _Atomic int no_copy_file_range_support;
   ssize_t r;
 
-  if (uv__load_relaxed(&no_copy_file_range_support)) {
+  if (atomic_load_explicit(&no_copy_file_range_support, memory_order_relaxed)) {
     errno = ENOSYS;
     return -1;
   }
@@ -990,7 +982,7 @@ static ssize_t uv__fs_try_copy_file_range(int in_fd, off_t* off,
       errno = ENOSYS;  /* Use fallback. */
     break;
   case ENOSYS:
-    uv__store_relaxed(&no_copy_file_range_support, 1);
+    atomic_store_explicit(&no_copy_file_range_support, 1, memory_order_relaxed);
     break;
   case EPERM:
     /* It's been reported that CIFS spuriously fails.
@@ -1061,10 +1053,7 @@ static ssize_t uv__fs_sendfile(uv_fs_t* req) {
 
     return -1;
   }
-#elif defined(__APPLE__)           || \
-      defined(__DragonFly__)       || \
-      defined(__FreeBSD__)         || \
-      defined(__FreeBSD_kernel__)
+#elif defined(__APPLE__) || defined(__DragonFly__) || defined(__FreeBSD__)
   {
     off_t len;
     ssize_t r;
@@ -1088,15 +1077,6 @@ static ssize_t uv__fs_sendfile(uv_fs_t* req) {
 #endif
     len = 0;
     r = sendfile(in_fd, out_fd, req->off, req->bufsml[0].len, NULL, &len, 0);
-#elif defined(__FreeBSD_kernel__)
-    len = 0;
-    r = bsd_sendfile(in_fd,
-                     out_fd,
-                     req->off,
-                     req->bufsml[0].len,
-                     NULL,
-                     &len,
-                     0);
 #else
     /* The darwin sendfile takes len as an input for the length to send,
      * so make sure to initialize it with the caller's value. */
@@ -1148,7 +1128,6 @@ static ssize_t uv__fs_utime(uv_fs_t* req) {
 #elif defined(__APPLE__)                                                      \
     || defined(__DragonFly__)                                                 \
     || defined(__FreeBSD__)                                                   \
-    || defined(__FreeBSD_kernel__)                                            \
     || defined(__NetBSD__)                                                    \
     || defined(__OpenBSD__)
   struct timeval tv[2];
@@ -1190,7 +1169,6 @@ static ssize_t uv__fs_lutime(uv_fs_t* req) {
 #elif defined(__APPLE__)          ||                                          \
       defined(__DragonFly__)      ||                                          \
       defined(__FreeBSD__)        ||                                          \
-      defined(__FreeBSD_kernel__) ||                                          \
       defined(__NetBSD__)
   struct timeval tv[2];
   tv[0] = uv__fs_to_timeval(req->atime);
@@ -1241,10 +1219,10 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
     }
 # if defined(__linux__)
     else {
-      r = uv__pwritev(req->file,
-                      (struct iovec*) req->bufs,
-                      req->nbufs,
-                      req->off);
+      r = pwritev(req->file,
+                  (struct iovec*) req->bufs,
+                  req->nbufs,
+                  req->off);
       if (r == -1 && errno == ENOSYS) {
         no_pwritev = 1;
         goto retry;
@@ -1288,7 +1266,7 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
     return srcfd;
 
   /* Get the source file's mode. */
-  if (fstat(srcfd, &src_statsbuf)) {
+  if (uv__fstat(srcfd, &src_statsbuf)) {
     err = UV__ERR(errno);
     goto out;
   }
@@ -1316,7 +1294,7 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
      destination are not the same file. If they are the same, bail out early. */
   if ((req->flags & UV_FS_COPYFILE_EXCL) == 0) {
     /* Get the destination file's mode. */
-    if (fstat(dstfd, &dst_statsbuf)) {
+    if (uv__fstat(dstfd, &dst_statsbuf)) {
       err = UV__ERR(errno);
       goto out;
     }
@@ -1330,7 +1308,19 @@ static ssize_t uv__fs_copyfile(uv_fs_t* req) {
     /* Truncate the file in case the destination already existed. */
     if (ftruncate(dstfd, 0) != 0) {
       err = UV__ERR(errno);
-      goto out;
+
+      /* ftruncate() on ceph-fuse fails with EACCES when the file is created
+       * with read only permissions. Since ftruncate() on a newly created
+       * file is a meaningless operation anyway, detect that condition
+       * and squelch the error.
+       */
+      if (err != UV_EACCES)
+        goto out;
+
+      if (dst_statsbuf.st_size > 0)
+        goto out;
+
+      err = 0;
     }
   }
 
@@ -1514,14 +1504,14 @@ static int uv__fs_statx(int fd,
                         uv_stat_t* buf) {
   STATIC_ASSERT(UV_ENOSYS != -1);
 #ifdef __linux__
-  static int no_statx;
+  static _Atomic int no_statx;
   struct uv__statx statxbuf;
   int dirfd;
   int flags;
   int mode;
   int rc;
 
-  if (uv__load_relaxed(&no_statx))
+  if (atomic_load_explicit(&no_statx, memory_order_relaxed))
     return UV_ENOSYS;
 
   dirfd = AT_FDCWD;
@@ -1555,30 +1545,11 @@ static int uv__fs_statx(int fd,
      * implemented, rc might return 1 with 0 set as the error code in which
      * case we return ENOSYS.
      */
-    uv__store_relaxed(&no_statx, 1);
+    atomic_store_explicit(&no_statx, 1, memory_order_relaxed);
     return UV_ENOSYS;
   }
 
-  buf->st_dev = makedev(statxbuf.stx_dev_major, statxbuf.stx_dev_minor);
-  buf->st_mode = statxbuf.stx_mode;
-  buf->st_nlink = statxbuf.stx_nlink;
-  buf->st_uid = statxbuf.stx_uid;
-  buf->st_gid = statxbuf.stx_gid;
-  buf->st_rdev = makedev(statxbuf.stx_rdev_major, statxbuf.stx_rdev_minor);
-  buf->st_ino = statxbuf.stx_ino;
-  buf->st_size = statxbuf.stx_size;
-  buf->st_blksize = statxbuf.stx_blksize;
-  buf->st_blocks = statxbuf.stx_blocks;
-  buf->st_atim.tv_sec = statxbuf.stx_atime.tv_sec;
-  buf->st_atim.tv_nsec = statxbuf.stx_atime.tv_nsec;
-  buf->st_mtim.tv_sec = statxbuf.stx_mtime.tv_sec;
-  buf->st_mtim.tv_nsec = statxbuf.stx_mtime.tv_nsec;
-  buf->st_ctim.tv_sec = statxbuf.stx_ctime.tv_sec;
-  buf->st_ctim.tv_nsec = statxbuf.stx_ctime.tv_nsec;
-  buf->st_birthtim.tv_sec = statxbuf.stx_btime.tv_sec;
-  buf->st_birthtim.tv_nsec = statxbuf.stx_btime.tv_nsec;
-  buf->st_flags = 0;
-  buf->st_gen = 0;
+  uv__statx_to_stat(&statxbuf, buf);
 
   return 0;
 #else
@@ -1595,7 +1566,7 @@ static int uv__fs_stat(const char *path, uv_stat_t *buf) {
   if (ret != UV_ENOSYS)
     return ret;
 
-  ret = stat(path, &pbuf);
+  ret = uv__stat(path, &pbuf);
   if (ret == 0)
     uv__to_stat(&pbuf, buf);
 
@@ -1611,7 +1582,7 @@ static int uv__fs_lstat(const char *path, uv_stat_t *buf) {
   if (ret != UV_ENOSYS)
     return ret;
 
-  ret = lstat(path, &pbuf);
+  ret = uv__lstat(path, &pbuf);
   if (ret == 0)
     uv__to_stat(&pbuf, buf);
 
@@ -1627,7 +1598,7 @@ static int uv__fs_fstat(int fd, uv_stat_t *buf) {
   if (ret != UV_ENOSYS)
     return ret;
 
-  ret = fstat(fd, &pbuf);
+  ret = uv__fstat(fd, &pbuf);
   if (ret == 0)
     uv__to_stat(&pbuf, buf);
 
@@ -1822,6 +1793,9 @@ int uv_fs_chown(uv_loop_t* loop,
 int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(CLOSE);
   req->file = file;
+  if (cb != NULL)
+    if (uv__iou_fs_close(loop, req))
+      return 0;
   POST;
 }
 
@@ -1869,6 +1843,9 @@ int uv_fs_lchown(uv_loop_t* loop,
 int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(FDATASYNC);
   req->file = file;
+  if (cb != NULL)
+    if (uv__iou_fs_fsync_or_fdatasync(loop, req, /* IORING_FSYNC_DATASYNC */ 1))
+      return 0;
   POST;
 }
 
@@ -1876,6 +1853,9 @@ int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
 int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(FSTAT);
   req->file = file;
+  if (cb != NULL)
+    if (uv__iou_fs_statx(loop, req, /* is_fstat */ 1, /* is_lstat */ 0))
+      return 0;
   POST;
 }
 
@@ -1883,6 +1863,9 @@ int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
 int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(FSYNC);
   req->file = file;
+  if (cb != NULL)
+    if (uv__iou_fs_fsync_or_fdatasync(loop, req, /* no flags */ 0))
+      return 0;
   POST;
 }
 
@@ -1929,6 +1912,9 @@ int uv_fs_lutime(uv_loop_t* loop,
 int uv_fs_lstat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
   INIT(LSTAT);
   PATH;
+  if (cb != NULL)
+    if (uv__iou_fs_statx(loop, req, /* is_fstat */ 0, /* is_lstat */ 1))
+      return 0;
   POST;
 }
 
@@ -1990,6 +1976,9 @@ int uv_fs_open(uv_loop_t* loop,
   PATH;
   req->flags = flags;
   req->mode = mode;
+  if (cb != NULL)
+    if (uv__iou_fs_open(loop, req))
+      return 0;
   POST;
 }
 
@@ -2018,6 +2007,11 @@ int uv_fs_read(uv_loop_t* loop, uv_fs_t* req,
   memcpy(req->bufs, bufs, nbufs * sizeof(*bufs));
 
   req->off = off;
+
+  if (cb != NULL)
+    if (uv__iou_fs_read_or_write(loop, req, /* is_read */ 1))
+      return 0;
+
   POST;
 }
 
@@ -2125,6 +2119,9 @@ int uv_fs_sendfile(uv_loop_t* loop,
 int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
   INIT(STAT);
   PATH;
+  if (cb != NULL)
+    if (uv__iou_fs_statx(loop, req, /* is_fstat */ 0, /* is_lstat */ 0))
+      return 0;
   POST;
 }
 
@@ -2188,6 +2185,11 @@ int uv_fs_write(uv_loop_t* loop,
   memcpy(req->bufs, bufs, nbufs * sizeof(*bufs));
 
   req->off = off;
+
+  if (cb != NULL)
+    if (uv__iou_fs_read_or_write(loop, req, /* is_read */ 0))
+      return 0;
+
   POST;
 }
 
@@ -2196,7 +2198,7 @@ void uv_fs_req_cleanup(uv_fs_t* req) {
   if (req == NULL)
     return;
 
-  /* Only necessary for asychronous requests, i.e., requests with a callback.
+  /* Only necessary for asynchronous requests, i.e., requests with a callback.
    * Synchronous ones don't copy their arguments and have req->path and
    * req->new_path pointing to user-owned memory.  UV_FS_MKDTEMP and
    * UV_FS_MKSTEMP are the exception to the rule, they always allocate memory.

deps/libuv/src/unix/fsevents.c

@@ -132,7 +132,6 @@ static void (*pCFRunLoopWakeUp)(CFRunLoopRef);
 static CFStringRef (*pCFStringCreateWithFileSystemRepresentation)(
     CFAllocatorRef,
     const char*);
-static CFStringEncoding (*pCFStringGetSystemEncoding)(void);
 static CFStringRef (*pkCFRunLoopDefaultMode);
 static FSEventStreamRef (*pFSEventStreamCreate)(CFAllocatorRef,
                                                 FSEventStreamCallback,
@@ -141,7 +140,6 @@ static FSEventStreamRef (*pFSEventStreamCreate)(CFAllocatorRef,
                                                 FSEventStreamEventId,
                                                 CFTimeInterval,
                                                 FSEventStreamCreateFlags);
-static void (*pFSEventStreamFlushSync)(FSEventStreamRef);
 static void (*pFSEventStreamInvalidate)(FSEventStreamRef);
 static void (*pFSEventStreamRelease)(FSEventStreamRef);
 static void (*pFSEventStreamScheduleWithRunLoop)(FSEventStreamRef,
@@ -331,8 +329,9 @@ static void uv__fsevents_event_cb(const FSEventStreamRef streamRef,
 
 
 /* Runs in CF thread */
-static int uv__fsevents_create_stream(uv_loop_t* loop, CFArrayRef paths) {
-  uv__cf_loop_state_t* state;
+static int uv__fsevents_create_stream(uv__cf_loop_state_t* state,
+                                      uv_loop_t* loop,
+                                      CFArrayRef paths) {
   FSEventStreamContext ctx;
   FSEventStreamRef ref;
   CFAbsoluteTime latency;
@@ -373,10 +372,7 @@ static int uv__fsevents_create_stream(uv_loop_t* loop, CFArrayRef paths) {
                              flags);
   assert(ref != NULL);
 
-  state = loop->cf_state;
-  pFSEventStreamScheduleWithRunLoop(ref,
-                                    state->loop,
-                                    *pkCFRunLoopDefaultMode);
+  pFSEventStreamScheduleWithRunLoop(ref, state->loop, *pkCFRunLoopDefaultMode);
   if (!pFSEventStreamStart(ref)) {
     pFSEventStreamInvalidate(ref);
     pFSEventStreamRelease(ref);
@@ -389,11 +385,7 @@ static int uv__fsevents_create_stream(uv_loop_t* loop, CFArrayRef paths) {
 
 
 /* Runs in CF thread */
-static void uv__fsevents_destroy_stream(uv_loop_t* loop) {
-  uv__cf_loop_state_t* state;
-
-  state = loop->cf_state;
-
+static void uv__fsevents_destroy_stream(uv__cf_loop_state_t* state) {
   if (state->fsevent_stream == NULL)
     return;
 
@@ -408,9 +400,9 @@ static void uv__fsevents_destroy_stream(uv_loop_t* loop) {
 
 
 /* Runs in CF thread, when there're new fsevent handles to add to stream */
-static void uv__fsevents_reschedule(uv_fs_event_t* handle,
+static void uv__fsevents_reschedule(uv__cf_loop_state_t* state,
+                                    uv_loop_t* loop,
                                     uv__cf_loop_signal_type_t type) {
-  uv__cf_loop_state_t* state;
   QUEUE* q;
   uv_fs_event_t* curr;
   CFArrayRef cf_paths;
@@ -419,7 +411,6 @@ static void uv__fsevents_reschedule(uv_fs_event_t* handle,
   int err;
   unsigned int path_count;
 
-  state = handle->loop->cf_state;
   paths = NULL;
   cf_paths = NULL;
   err = 0;
@@ -438,7 +429,7 @@ static void uv__fsevents_reschedule(uv_fs_event_t* handle,
   uv_mutex_unlock(&state->fsevent_mutex);
 
   /* Destroy previous FSEventStream */
-  uv__fsevents_destroy_stream(handle->loop);
+  uv__fsevents_destroy_stream(state);
 
   /* Any failure below will be a memory failure */
   err = UV_ENOMEM;
@@ -478,7 +469,7 @@ static void uv__fsevents_reschedule(uv_fs_event_t* handle,
       err = UV_ENOMEM;
       goto final;
     }
-    err = uv__fsevents_create_stream(handle->loop, cf_paths);
+    err = uv__fsevents_create_stream(state, loop, cf_paths);
   }
 
 final:
@@ -563,10 +554,8 @@ static int uv__fsevents_global_init(void) {
   V(core_foundation_handle, CFRunLoopStop);
   V(core_foundation_handle, CFRunLoopWakeUp);
   V(core_foundation_handle, CFStringCreateWithFileSystemRepresentation);
-  V(core_foundation_handle, CFStringGetSystemEncoding);
   V(core_foundation_handle, kCFRunLoopDefaultMode);
   V(core_services_handle, FSEventStreamCreate);
-  V(core_services_handle, FSEventStreamFlushSync);
   V(core_services_handle, FSEventStreamInvalidate);
   V(core_services_handle, FSEventStreamRelease);
   V(core_services_handle, FSEventStreamScheduleWithRunLoop);
@@ -767,7 +756,7 @@ static void uv__cf_loop_cb(void* arg) {
     if (s->handle == NULL)
       pCFRunLoopStop(state->loop);
     else
-      uv__fsevents_reschedule(s->handle, s->type);
+      uv__fsevents_reschedule(state, loop, s->type);
 
     uv__free(s);
   }

deps/libuv/src/unix/haiku.c

@@ -84,6 +84,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 int uv_resident_set_memory(size_t* rss) {
   area_info area;
   ssize_t cookie;

deps/libuv/src/unix/hurd.c

@@ -165,3 +165,8 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
 uint64_t uv_get_constrained_memory(void) {
   return 0;  /* Memory constraints are unknown. */
 }
+
+
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}

deps/libuv/src/unix/ibmi.c

@@ -249,6 +249,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 void uv_loadavg(double avg[3]) {
   SSTS0200 rcvr;
 

deps/libuv/src/unix/internal.h

@@ -26,21 +26,34 @@
 
 #include <assert.h>
 #include <limits.h> /* _POSIX_PATH_MAX, PATH_MAX */
+#include <stdint.h>
 #include <stdlib.h> /* abort */
 #include <string.h> /* strrchr */
 #include <fcntl.h>  /* O_CLOEXEC and O_NONBLOCK, if supported. */
 #include <stdio.h>
 #include <errno.h>
 #include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#define uv__msan_unpoison(p, n)                                               \
+  do {                                                                        \
+    (void) (p);                                                               \
+    (void) (n);                                                               \
+  } while (0)
+
+#if defined(__has_feature)
+# if __has_feature(memory_sanitizer)
+#  include <sanitizer/msan_interface.h>
+#  undef uv__msan_unpoison
+#  define uv__msan_unpoison __msan_unpoison
+# endif
+#endif
 
 #if defined(__STRICT_ANSI__)
 # define inline __inline
 #endif
 
-#if defined(__linux__)
-# include "linux-syscalls.h"
-#endif /* __linux__ */
-
 #if defined(__MVS__)
 # include "os390-syscalls.h"
 #endif /* __MVS__ */
@@ -79,13 +92,11 @@
 # define UV__PATH_MAX 8192
 #endif
 
-#if defined(__ANDROID__)
-int uv__pthread_sigmask(int how, const sigset_t* set, sigset_t* oset);
-# ifdef pthread_sigmask
-# undef pthread_sigmask
-# endif
-# define pthread_sigmask(how, set, oldset) uv__pthread_sigmask(how, set, oldset)
-#endif
+union uv__sockaddr {
+  struct sockaddr_in6 in6;
+  struct sockaddr_in in;
+  struct sockaddr addr;
+};
 
 #define ACCESS_ONCE(type, var)                                                \
   (*(volatile type*) &(var))
@@ -166,12 +177,42 @@ struct uv__stream_queued_fds_s {
   int fds[1];
 };
 
+#ifdef __linux__
+struct uv__statx_timestamp {
+  int64_t tv_sec;
+  uint32_t tv_nsec;
+  int32_t unused0;
+};
+
+struct uv__statx {
+  uint32_t stx_mask;
+  uint32_t stx_blksize;
+  uint64_t stx_attributes;
+  uint32_t stx_nlink;
+  uint32_t stx_uid;
+  uint32_t stx_gid;
+  uint16_t stx_mode;
+  uint16_t unused0;
+  uint64_t stx_ino;
+  uint64_t stx_size;
+  uint64_t stx_blocks;
+  uint64_t stx_attributes_mask;
+  struct uv__statx_timestamp stx_atime;
+  struct uv__statx_timestamp stx_btime;
+  struct uv__statx_timestamp stx_ctime;
+  struct uv__statx_timestamp stx_mtime;
+  uint32_t stx_rdev_major;
+  uint32_t stx_rdev_minor;
+  uint32_t stx_dev_major;
+  uint32_t stx_dev_minor;
+  uint64_t unused1[14];
+};
+#endif /* __linux__ */
 
 #if defined(_AIX) || \
     defined(__APPLE__) || \
     defined(__DragonFly__) || \
     defined(__FreeBSD__) || \
-    defined(__FreeBSD_kernel__) || \
     defined(__linux__) || \
     defined(__OpenBSD__) || \
     defined(__NetBSD__)
@@ -258,10 +299,10 @@ int uv__signal_loop_fork(uv_loop_t* loop);
 /* platform specific */
 uint64_t uv__hrtime(uv_clocktype_t type);
 int uv__kqueue_init(uv_loop_t* loop);
-int uv__epoll_init(uv_loop_t* loop);
 int uv__platform_loop_init(uv_loop_t* loop);
 void uv__platform_loop_delete(uv_loop_t* loop);
 void uv__platform_invalidate_fd(uv_loop_t* loop, int fd);
+int uv__process_init(uv_loop_t* loop);
 
 /* various */
 void uv__async_close(uv_async_t* handle);
@@ -278,7 +319,6 @@ size_t uv__thread_stack_size(void);
 void uv__udp_close(uv_udp_t* handle);
 void uv__udp_finish_close(uv_udp_t* handle);
 FILE* uv__open_file(const char* path);
-int uv__getpwuid_r(uv_passwd_t* pwd);
 int uv__search_path(const char* prog, char* buf, size_t* buflen);
 void uv__wait_children(uv_loop_t* loop);
 
@@ -289,6 +329,28 @@ int uv__random_getentropy(void* buf, size_t buflen);
 int uv__random_readpath(const char* path, void* buf, size_t buflen);
 int uv__random_sysctl(void* buf, size_t buflen);
 
+/* io_uring */
+#ifdef __linux__
+int uv__iou_fs_close(uv_loop_t* loop, uv_fs_t* req);
+int uv__iou_fs_fsync_or_fdatasync(uv_loop_t* loop,
+                                  uv_fs_t* req,
+                                  uint32_t fsync_flags);
+int uv__iou_fs_open(uv_loop_t* loop, uv_fs_t* req);
+int uv__iou_fs_read_or_write(uv_loop_t* loop,
+                             uv_fs_t* req,
+                             int is_read);
+int uv__iou_fs_statx(uv_loop_t* loop,
+                     uv_fs_t* req,
+                     int is_fstat,
+                     int is_lstat);
+#else
+#define uv__iou_fs_close(loop, req) 0
+#define uv__iou_fs_fsync_or_fdatasync(loop, req, fsync_flags) 0
+#define uv__iou_fs_open(loop, req) 0
+#define uv__iou_fs_read_or_write(loop, req, is_read) 0
+#define uv__iou_fs_statx(loop, req, is_fstat, is_lstat) 0
+#endif
+
 #if defined(__APPLE__)
 int uv___stream_fd(const uv_stream_t* handle);
 #define uv__stream_fd(handle) (uv___stream_fd((const uv_stream_t*) (handle)))
@@ -322,8 +384,51 @@ UV_UNUSED(static char* uv__basename_r(const char* path)) {
   return s + 1;
 }
 
+UV_UNUSED(static int uv__fstat(int fd, struct stat* s)) {
+  int rc;
+
+  rc = fstat(fd, s);
+  if (rc >= 0)
+    uv__msan_unpoison(s, sizeof(*s));
+
+  return rc;
+}
+
+UV_UNUSED(static int uv__lstat(const char* path, struct stat* s)) {
+  int rc;
+
+  rc = lstat(path, s);
+  if (rc >= 0)
+    uv__msan_unpoison(s, sizeof(*s));
+
+  return rc;
+}
+
+UV_UNUSED(static int uv__stat(const char* path, struct stat* s)) {
+  int rc;
+
+  rc = stat(path, s);
+  if (rc >= 0)
+    uv__msan_unpoison(s, sizeof(*s));
+
+  return rc;
+}
+
 #if defined(__linux__)
-int uv__inotify_fork(uv_loop_t* loop, void* old_watchers);
+ssize_t
+uv__fs_copy_file_range(int fd_in,
+                       off_t* off_in,
+                       int fd_out,
+                       off_t* off_out,
+                       size_t len,
+                       unsigned int flags);
+int uv__statx(int dirfd,
+              const char* path,
+              int flags,
+              unsigned int mask,
+              struct uv__statx* statxbuf);
+void uv__statx_to_stat(const struct uv__statx* statxbuf, uv_stat_t* buf);
+ssize_t uv__getrandom(void* buf, size_t buflen, unsigned flags);
 #endif
 
 typedef int (*uv__peersockfunc)(int, struct sockaddr*, socklen_t*);
@@ -333,22 +438,6 @@ int uv__getsockpeername(const uv_handle_t* handle,
                         struct sockaddr* name,
                         int* namelen);
 
-#if defined(__linux__)            ||                                      \
-    defined(__FreeBSD__)          ||                                      \
-    defined(__FreeBSD_kernel__)   ||                                       \
-    defined(__DragonFly__)
-#define HAVE_MMSG 1
-struct uv__mmsghdr {
-  struct msghdr msg_hdr;
-  unsigned int msg_len;
-};
-
-int uv__recvmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen);
-int uv__sendmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen);
-#else
-#define HAVE_MMSG 0
-#endif
-
 #if defined(__sun)
 #if !defined(_POSIX_VERSION) || _POSIX_VERSION < 200809L
 size_t strnlen(const char* s, size_t maxlen);
@@ -365,5 +454,10 @@ uv__fs_copy_file_range(int fd_in,
                        unsigned int flags);
 #endif
 
+#if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 1301000)
+#define UV__CPU_AFFINITY_SUPPORTED 1
+#else
+#define UV__CPU_AFFINITY_SUPPORTED 0
+#endif
 
 #endif /* UV_UNIX_INTERNAL_H_ */

deps/libuv/src/unix/kqueue.c

@@ -60,7 +60,7 @@ int uv__kqueue_init(uv_loop_t* loop) {
 
 
 #if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
-static int uv__has_forked_with_cfrunloop;
+static _Atomic int uv__has_forked_with_cfrunloop;
 #endif
 
 int uv__io_fork(uv_loop_t* loop) {
@@ -82,7 +82,9 @@ int uv__io_fork(uv_loop_t* loop) {
        process. So we sidestep the issue by pretending like we never
        started it in the first place.
     */
-    uv__store_relaxed(&uv__has_forked_with_cfrunloop, 1);
+    atomic_store_explicit(&uv__has_forked_with_cfrunloop,
+                          1,
+                          memory_order_relaxed);
     uv__free(loop->cf_state);
     loop->cf_state = NULL;
   }
@@ -109,7 +111,23 @@ int uv__io_check_fd(uv_loop_t* loop, int fd) {
 }
 
 
+static void uv__kqueue_delete(int kqfd, const struct kevent *ev) {
+  struct kevent change;
+
+  EV_SET(&change, ev->ident, ev->filter, EV_DELETE, 0, 0, 0);
+
+  if (0 == kevent(kqfd, &change, 1, NULL, 0, NULL))
+    return;
+
+  if (errno == EBADF || errno == ENOENT)
+    return;
+
+  abort();
+}
+
+
 void uv__io_poll(uv_loop_t* loop, int timeout) {
+  uv__loop_internal_fields_t* lfields;
   struct kevent events[1024];
   struct kevent* ev;
   struct timespec spec;
@@ -138,6 +156,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     return;
   }
 
+  lfields = uv__get_internal_fields(loop);
   nevents = 0;
 
   while (!QUEUE_EMPTY(&loop->watcher_queue)) {
@@ -205,7 +224,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
   base = loop->time;
   count = 48; /* Benchmarks suggest this gives the best throughput. */
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -228,6 +247,12 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     if (pset != NULL)
       pthread_sigmask(SIG_BLOCK, pset, NULL);
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     nfds = kevent(loop->backend_fd,
                   events,
                   nevents,
@@ -235,6 +260,9 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
                   ARRAY_SIZE(events),
                   timeout == -1 ? NULL : &spec);
 
+    if (nfds == -1)
+      assert(errno == EINTR);
+
     if (pset != NULL)
       pthread_sigmask(SIG_UNBLOCK, pset, NULL);
 
@@ -242,36 +270,26 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
      * timeout == 0 (i.e. non-blocking poll) but there is no guarantee that the
      * operating system didn't reschedule our process while in the syscall.
      */
-    SAVE_ERRNO(uv__update_time(loop));
+    uv__update_time(loop);
 
-    if (nfds == 0) {
-      if (reset_timeout != 0) {
-        timeout = user_timeout;
-        reset_timeout = 0;
-        if (timeout == -1)
-          continue;
-        if (timeout > 0)
-          goto update_timeout;
+    if (nfds == 0 || nfds == -1) {
+      /* If kqueue is empty or interrupted, we might still have children ready
+       * to reap immediately. */
+      if (loop->flags & UV_LOOP_REAP_CHILDREN) {
+        loop->flags &= ~UV_LOOP_REAP_CHILDREN;
+        uv__wait_children(loop);
+        assert((reset_timeout == 0 ? timeout : user_timeout) == 0);
+        return; /* Equivalent to fall-through behavior. */
       }
 
-      assert(timeout != -1);
-      return;
-    }
-
-    if (nfds == -1) {
-      if (errno != EINTR)
-        abort();
-
       if (reset_timeout != 0) {
         timeout = user_timeout;
         reset_timeout = 0;
-      }
-
-      if (timeout == 0)
+      } else if (nfds == 0) {
+        /* Reached the user timeout value. */
+        assert(timeout != -1);
         return;
-
-      if (timeout == -1)
-        continue;
+      }
 
       /* Interrupted by a signal. Update timeout and poll again. */
       goto update_timeout;
@@ -307,15 +325,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       w = loop->watchers[fd];
 
       if (w == NULL) {
-        /* File descriptor that we've stopped watching, disarm it.
-         * TODO: batch up. */
-        struct kevent events[1];
-
-        EV_SET(events + 0, fd, ev->filter, EV_DELETE, 0, 0, 0);
-        if (kevent(loop->backend_fd, events, 1, NULL, 0, NULL))
-          if (errno != EBADF && errno != ENOENT)
-            abort();
-
+        /* File descriptor that we've stopped watching, disarm it. */
+        uv__kqueue_delete(loop->backend_fd, ev);
         continue;
       }
 
@@ -331,47 +342,27 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       revents = 0;
 
       if (ev->filter == EVFILT_READ) {
-        if (w->pevents & POLLIN) {
+        if (w->pevents & POLLIN)
           revents |= POLLIN;
-          w->rcount = ev->data;
-        } else {
-          /* TODO batch up */
-          struct kevent events[1];
-          EV_SET(events + 0, fd, ev->filter, EV_DELETE, 0, 0, 0);
-          if (kevent(loop->backend_fd, events, 1, NULL, 0, NULL))
-            if (errno != ENOENT)
-              abort();
-        }
+        else
+          uv__kqueue_delete(loop->backend_fd, ev);
+
         if ((ev->flags & EV_EOF) && (w->pevents & UV__POLLRDHUP))
           revents |= UV__POLLRDHUP;
       }
 
       if (ev->filter == EV_OOBAND) {
-        if (w->pevents & UV__POLLPRI) {
+        if (w->pevents & UV__POLLPRI)
           revents |= UV__POLLPRI;
-          w->rcount = ev->data;
-        } else {
-          /* TODO batch up */
-          struct kevent events[1];
-          EV_SET(events + 0, fd, ev->filter, EV_DELETE, 0, 0, 0);
-          if (kevent(loop->backend_fd, events, 1, NULL, 0, NULL))
-            if (errno != ENOENT)
-              abort();
-        }
+        else
+          uv__kqueue_delete(loop->backend_fd, ev);
       }
 
       if (ev->filter == EVFILT_WRITE) {
-        if (w->pevents & POLLOUT) {
+        if (w->pevents & POLLOUT)
           revents |= POLLOUT;
-          w->wcount = ev->data;
-        } else {
-          /* TODO batch up */
-          struct kevent events[1];
-          EV_SET(events + 0, fd, ev->filter, EV_DELETE, 0, 0, 0);
-          if (kevent(loop->backend_fd, events, 1, NULL, 0, NULL))
-            if (errno != ENOENT)
-              abort();
-        }
+        else
+          uv__kqueue_delete(loop->backend_fd, ev);
       }
 
       if (ev->flags & EV_ERROR)
@@ -398,9 +389,11 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       uv__wait_children(loop);
     }
 
+    uv__metrics_inc_events(loop, nevents);
     if (reset_timeout != 0) {
       timeout = user_timeout;
       reset_timeout = 0;
+      uv__metrics_inc_events_waiting(loop, nevents);
     }
 
     if (have_signals != 0) {
@@ -423,13 +416,13 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       return;
     }
 
+update_timeout:
     if (timeout == 0)
       return;
 
     if (timeout == -1)
       continue;
 
-update_timeout:
     assert(timeout > 0);
 
     diff = loop->time - base;
@@ -541,13 +534,14 @@ int uv_fs_event_start(uv_fs_event_t* handle,
   handle->realpath_len = 0;
   handle->cf_flags = flags;
 
-  if (fstat(fd, &statbuf))
+  if (uv__fstat(fd, &statbuf))
     goto fallback;
   /* FSEvents works only with directories */
   if (!(statbuf.st_mode & S_IFDIR))
     goto fallback;
 
-  if (0 == uv__load_relaxed(&uv__has_forked_with_cfrunloop)) {
+  if (0 == atomic_load_explicit(&uv__has_forked_with_cfrunloop,
+                                memory_order_relaxed)) {
     int r;
     /* The fallback fd is no longer needed */
     uv__close_nocheckstdio(fd);
@@ -582,7 +576,8 @@ int uv_fs_event_stop(uv_fs_event_t* handle) {
   uv__handle_stop(handle);
 
 #if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
-  if (0 == uv__load_relaxed(&uv__has_forked_with_cfrunloop))
+  if (0 == atomic_load_explicit(&uv__has_forked_with_cfrunloop,
+                                memory_order_relaxed))
     if (handle->cf_cb != NULL)
       r = uv__fsevents_close(handle);
 #endif

deps/libuv/src/unix/linux-core.c

@@ -1,834 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-/* We lean on the fact that POLL{IN,OUT,ERR,HUP} correspond with their
- * EPOLL* counterparts.  We use the POLL* variants in this file because that
- * is what libuv uses elsewhere.
- */
-
-#include "uv.h"
-#include "internal.h"
-
-#include <inttypes.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <errno.h>
-
-#include <net/if.h>
-#include <sys/epoll.h>
-#include <sys/param.h>
-#include <sys/prctl.h>
-#include <sys/sysinfo.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <time.h>
-
-#define HAVE_IFADDRS_H 1
-
-# if defined(__ANDROID_API__) && __ANDROID_API__ < 24
-# undef HAVE_IFADDRS_H
-#endif
-
-#ifdef __UCLIBC__
-# if __UCLIBC_MAJOR__ < 0 && __UCLIBC_MINOR__ < 9 && __UCLIBC_SUBLEVEL__ < 32
-#  undef HAVE_IFADDRS_H
-# endif
-#endif
-
-#ifdef HAVE_IFADDRS_H
-# include <ifaddrs.h>
-# include <sys/socket.h>
-# include <net/ethernet.h>
-# include <netpacket/packet.h>
-#endif /* HAVE_IFADDRS_H */
-
-/* Available from 2.6.32 onwards. */
-#ifndef CLOCK_MONOTONIC_COARSE
-# define CLOCK_MONOTONIC_COARSE 6
-#endif
-
-/* This is rather annoying: CLOCK_BOOTTIME lives in <linux/time.h> but we can't
- * include that file because it conflicts with <time.h>. We'll just have to
- * define it ourselves.
- */
-#ifndef CLOCK_BOOTTIME
-# define CLOCK_BOOTTIME 7
-#endif
-
-static int read_models(unsigned int numcpus, uv_cpu_info_t* ci);
-static int read_times(FILE* statfile_fp,
-                      unsigned int numcpus,
-                      uv_cpu_info_t* ci);
-static void read_speeds(unsigned int numcpus, uv_cpu_info_t* ci);
-static uint64_t read_cpufreq(unsigned int cpunum);
-
-int uv__platform_loop_init(uv_loop_t* loop) {
-  
-  loop->inotify_fd = -1;
-  loop->inotify_watchers = NULL;
-
-  return uv__epoll_init(loop);
-}
-
-
-int uv__io_fork(uv_loop_t* loop) {
-  int err;
-  void* old_watchers;
-
-  old_watchers = loop->inotify_watchers;
-
-  uv__close(loop->backend_fd);
-  loop->backend_fd = -1;
-  uv__platform_loop_delete(loop);
-
-  err = uv__platform_loop_init(loop);
-  if (err)
-    return err;
-
-  return uv__inotify_fork(loop, old_watchers);
-}
-
-
-void uv__platform_loop_delete(uv_loop_t* loop) {
-  if (loop->inotify_fd == -1) return;
-  uv__io_stop(loop, &loop->inotify_read_watcher, POLLIN);
-  uv__close(loop->inotify_fd);
-  loop->inotify_fd = -1;
-}
-
-
-
-uint64_t uv__hrtime(uv_clocktype_t type) {
-  static clock_t fast_clock_id = -1;
-  struct timespec t;
-  clock_t clock_id;
-
-  /* Prefer CLOCK_MONOTONIC_COARSE if available but only when it has
-   * millisecond granularity or better.  CLOCK_MONOTONIC_COARSE is
-   * serviced entirely from the vDSO, whereas CLOCK_MONOTONIC may
-   * decide to make a costly system call.
-   */
-  /* TODO(bnoordhuis) Use CLOCK_MONOTONIC_COARSE for UV_CLOCK_PRECISE
-   * when it has microsecond granularity or better (unlikely).
-   */
-  clock_id = CLOCK_MONOTONIC;
-  if (type != UV_CLOCK_FAST)
-    goto done;
-
-  clock_id = uv__load_relaxed(&fast_clock_id);
-  if (clock_id != -1)
-    goto done;
-
-  clock_id = CLOCK_MONOTONIC;
-  if (0 == clock_getres(CLOCK_MONOTONIC_COARSE, &t))
-    if (t.tv_nsec <= 1 * 1000 * 1000)
-      clock_id = CLOCK_MONOTONIC_COARSE;
-
-  uv__store_relaxed(&fast_clock_id, clock_id);
-
-done:
-
-  if (clock_gettime(clock_id, &t))
-    return 0;  /* Not really possible. */
-
-  return t.tv_sec * (uint64_t) 1e9 + t.tv_nsec;
-}
-
-
-int uv_resident_set_memory(size_t* rss) {
-  char buf[1024];
-  const char* s;
-  ssize_t n;
-  long val;
-  int fd;
-  int i;
-
-  do
-    fd = open("/proc/self/stat", O_RDONLY);
-  while (fd == -1 && errno == EINTR);
-
-  if (fd == -1)
-    return UV__ERR(errno);
-
-  do
-    n = read(fd, buf, sizeof(buf) - 1);
-  while (n == -1 && errno == EINTR);
-
-  uv__close(fd);
-  if (n == -1)
-    return UV__ERR(errno);
-  buf[n] = '\0';
-
-  s = strchr(buf, ' ');
-  if (s == NULL)
-    goto err;
-
-  s += 1;
-  if (*s != '(')
-    goto err;
-
-  s = strchr(s, ')');
-  if (s == NULL)
-    goto err;
-
-  for (i = 1; i <= 22; i++) {
-    s = strchr(s + 1, ' ');
-    if (s == NULL)
-      goto err;
-  }
-
-  errno = 0;
-  val = strtol(s, NULL, 10);
-  if (errno != 0)
-    goto err;
-  if (val < 0)
-    goto err;
-
-  *rss = val * getpagesize();
-  return 0;
-
-err:
-  return UV_EINVAL;
-}
-
-int uv_uptime(double* uptime) {
-  static volatile int no_clock_boottime;
-  char buf[128];
-  struct timespec now;
-  int r;
-
-  /* Try /proc/uptime first, then fallback to clock_gettime(). */
-
-  if (0 == uv__slurp("/proc/uptime", buf, sizeof(buf)))
-    if (1 == sscanf(buf, "%lf", uptime))
-      return 0;
-
-  /* Try CLOCK_BOOTTIME first, fall back to CLOCK_MONOTONIC if not available
-   * (pre-2.6.39 kernels). CLOCK_MONOTONIC doesn't increase when the system
-   * is suspended.
-   */
-  if (no_clock_boottime) {
-    retry_clock_gettime: r = clock_gettime(CLOCK_MONOTONIC, &now);
-  }
-  else if ((r = clock_gettime(CLOCK_BOOTTIME, &now)) && errno == EINVAL) {
-    no_clock_boottime = 1;
-    goto retry_clock_gettime;
-  }
-
-  if (r)
-    return UV__ERR(errno);
-
-  *uptime = now.tv_sec;
-  return 0;
-}
-
-
-static int uv__cpu_num(FILE* statfile_fp, unsigned int* numcpus) {
-  unsigned int num;
-  char buf[1024];
-
-  if (!fgets(buf, sizeof(buf), statfile_fp))
-    return UV_EIO;
-
-  num = 0;
-  while (fgets(buf, sizeof(buf), statfile_fp)) {
-    if (strncmp(buf, "cpu", 3))
-      break;
-    num++;
-  }
-
-  if (num == 0)
-    return UV_EIO;
-
-  *numcpus = num;
-  return 0;
-}
-
-
-int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
-  unsigned int numcpus;
-  uv_cpu_info_t* ci;
-  int err;
-  FILE* statfile_fp;
-
-  *cpu_infos = NULL;
-  *count = 0;
-
-  statfile_fp = uv__open_file("/proc/stat");
-  if (statfile_fp == NULL)
-    return UV__ERR(errno);
-
-  err = uv__cpu_num(statfile_fp, &numcpus);
-  if (err < 0)
-    goto out;
-
-  err = UV_ENOMEM;
-  ci = uv__calloc(numcpus, sizeof(*ci));
-  if (ci == NULL)
-    goto out;
-
-  err = read_models(numcpus, ci);
-  if (err == 0)
-    err = read_times(statfile_fp, numcpus, ci);
-
-  if (err) {
-    uv_free_cpu_info(ci, numcpus);
-    goto out;
-  }
-
-  /* read_models() on x86 also reads the CPU speed from /proc/cpuinfo.
-   * We don't check for errors here. Worst case, the field is left zero.
-   */
-  if (ci[0].speed == 0)
-    read_speeds(numcpus, ci);
-
-  *cpu_infos = ci;
-  *count = numcpus;
-  err = 0;
-
-out:
-
-  if (fclose(statfile_fp))
-    if (errno != EINTR && errno != EINPROGRESS)
-      abort();
-
-  return err;
-}
-
-
-static void read_speeds(unsigned int numcpus, uv_cpu_info_t* ci) {
-  unsigned int num;
-
-  for (num = 0; num < numcpus; num++)
-    ci[num].speed = read_cpufreq(num) / 1000;
-}
-
-
-/* Also reads the CPU frequency on ppc and x86. The other architectures only
- * have a BogoMIPS field, which may not be very accurate.
- *
- * Note: Simply returns on error, uv_cpu_info() takes care of the cleanup.
- */
-static int read_models(unsigned int numcpus, uv_cpu_info_t* ci) {
-#if defined(__PPC__)
-  static const char model_marker[] = "cpu\t\t: ";
-  static const char speed_marker[] = "clock\t\t: ";
-#else
-  static const char model_marker[] = "model name\t: ";
-  static const char speed_marker[] = "cpu MHz\t\t: ";
-#endif
-  const char* inferred_model;
-  unsigned int model_idx;
-  unsigned int speed_idx;
-  unsigned int part_idx;
-  char buf[1024];
-  char* model;
-  FILE* fp;
-  int model_id;
-
-  /* Most are unused on non-ARM, non-MIPS and non-x86 architectures. */
-  (void) &model_marker;
-  (void) &speed_marker;
-  (void) &speed_idx;
-  (void) &part_idx;
-  (void) &model;
-  (void) &buf;
-  (void) &fp;
-  (void) &model_id;
-
-  model_idx = 0;
-  speed_idx = 0;
-  part_idx = 0;
-
-#if defined(__arm__) || \
-    defined(__i386__) || \
-    defined(__mips__) || \
-    defined(__aarch64__) || \
-    defined(__PPC__) || \
-    defined(__x86_64__)
-  fp = uv__open_file("/proc/cpuinfo");
-  if (fp == NULL)
-    return UV__ERR(errno);
-
-  while (fgets(buf, sizeof(buf), fp)) {
-    if (model_idx < numcpus) {
-      if (strncmp(buf, model_marker, sizeof(model_marker) - 1) == 0) {
-        model = buf + sizeof(model_marker) - 1;
-        model = uv__strndup(model, strlen(model) - 1);  /* Strip newline. */
-        if (model == NULL) {
-          fclose(fp);
-          return UV_ENOMEM;
-        }
-        ci[model_idx++].model = model;
-        continue;
-      }
-    }
-#if defined(__arm__) || defined(__mips__) || defined(__aarch64__)
-    if (model_idx < numcpus) {
-#if defined(__arm__)
-      /* Fallback for pre-3.8 kernels. */
-      static const char model_marker[] = "Processor\t: ";
-#elif defined(__aarch64__)
-      static const char part_marker[] = "CPU part\t: ";
-
-      /* Adapted from: https://github.com/karelzak/util-linux */
-      struct vendor_part {
-        const int id;
-        const char* name;
-      };
-
-      static const struct vendor_part arm_chips[] = {
-        { 0x811, "ARM810" },
-        { 0x920, "ARM920" },
-        { 0x922, "ARM922" },
-        { 0x926, "ARM926" },
-        { 0x940, "ARM940" },
-        { 0x946, "ARM946" },
-        { 0x966, "ARM966" },
-        { 0xa20, "ARM1020" },
-        { 0xa22, "ARM1022" },
-        { 0xa26, "ARM1026" },
-        { 0xb02, "ARM11 MPCore" },
-        { 0xb36, "ARM1136" },
-        { 0xb56, "ARM1156" },
-        { 0xb76, "ARM1176" },
-        { 0xc05, "Cortex-A5" },
-        { 0xc07, "Cortex-A7" },
-        { 0xc08, "Cortex-A8" },
-        { 0xc09, "Cortex-A9" },
-        { 0xc0d, "Cortex-A17" },  /* Originally A12 */
-        { 0xc0f, "Cortex-A15" },
-        { 0xc0e, "Cortex-A17" },
-        { 0xc14, "Cortex-R4" },
-        { 0xc15, "Cortex-R5" },
-        { 0xc17, "Cortex-R7" },
-        { 0xc18, "Cortex-R8" },
-        { 0xc20, "Cortex-M0" },
-        { 0xc21, "Cortex-M1" },
-        { 0xc23, "Cortex-M3" },
-        { 0xc24, "Cortex-M4" },
-        { 0xc27, "Cortex-M7" },
-        { 0xc60, "Cortex-M0+" },
-        { 0xd01, "Cortex-A32" },
-        { 0xd03, "Cortex-A53" },
-        { 0xd04, "Cortex-A35" },
-        { 0xd05, "Cortex-A55" },
-        { 0xd06, "Cortex-A65" },
-        { 0xd07, "Cortex-A57" },
-        { 0xd08, "Cortex-A72" },
-        { 0xd09, "Cortex-A73" },
-        { 0xd0a, "Cortex-A75" },
-        { 0xd0b, "Cortex-A76" },
-        { 0xd0c, "Neoverse-N1" },
-        { 0xd0d, "Cortex-A77" },
-        { 0xd0e, "Cortex-A76AE" },
-        { 0xd13, "Cortex-R52" },
-        { 0xd20, "Cortex-M23" },
-        { 0xd21, "Cortex-M33" },
-        { 0xd41, "Cortex-A78" },
-        { 0xd42, "Cortex-A78AE" },
-        { 0xd4a, "Neoverse-E1" },
-        { 0xd4b, "Cortex-A78C" },
-      };
-
-      if (strncmp(buf, part_marker, sizeof(part_marker) - 1) == 0) {
-        model = buf + sizeof(part_marker) - 1;
-
-        errno = 0;
-        model_id = strtol(model, NULL, 16);
-        if ((errno != 0) || model_id < 0) {
-          fclose(fp);
-          return UV_EINVAL;
-        }
-
-        for (part_idx = 0; part_idx < ARRAY_SIZE(arm_chips); part_idx++) {
-          if (model_id == arm_chips[part_idx].id) {
-            model = uv__strdup(arm_chips[part_idx].name);
-            if (model == NULL) {
-              fclose(fp);
-              return UV_ENOMEM;
-            }
-            ci[model_idx++].model = model;
-            break;
-          }
-        }
-      }
-#else	/* defined(__mips__) */
-      static const char model_marker[] = "cpu model\t\t: ";
-#endif
-      if (strncmp(buf, model_marker, sizeof(model_marker) - 1) == 0) {
-        model = buf + sizeof(model_marker) - 1;
-        model = uv__strndup(model, strlen(model) - 1);  /* Strip newline. */
-        if (model == NULL) {
-          fclose(fp);
-          return UV_ENOMEM;
-        }
-        ci[model_idx++].model = model;
-        continue;
-      }
-    }
-#else  /* !__arm__ && !__mips__ && !__aarch64__ */
-    if (speed_idx < numcpus) {
-      if (strncmp(buf, speed_marker, sizeof(speed_marker) - 1) == 0) {
-        ci[speed_idx++].speed = atoi(buf + sizeof(speed_marker) - 1);
-        continue;
-      }
-    }
-#endif  /* __arm__ || __mips__ || __aarch64__ */
-  }
-
-  fclose(fp);
-#endif  /* __arm__ || __i386__ || __mips__ || __PPC__ || __x86_64__ || __aarch__ */
-
-  /* Now we want to make sure that all the models contain *something* because
-   * it's not safe to leave them as null. Copy the last entry unless there
-   * isn't one, in that case we simply put "unknown" into everything.
-   */
-  inferred_model = "unknown";
-  if (model_idx > 0)
-    inferred_model = ci[model_idx - 1].model;
-
-  while (model_idx < numcpus) {
-    model = uv__strndup(inferred_model, strlen(inferred_model));
-    if (model == NULL)
-      return UV_ENOMEM;
-    ci[model_idx++].model = model;
-  }
-
-  return 0;
-}
-
-
-static int read_times(FILE* statfile_fp,
-                      unsigned int numcpus,
-                      uv_cpu_info_t* ci) {
-  struct uv_cpu_times_s ts;
-  unsigned int ticks;
-  unsigned int multiplier;
-  uint64_t user;
-  uint64_t nice;
-  uint64_t sys;
-  uint64_t idle;
-  uint64_t dummy;
-  uint64_t irq;
-  uint64_t num;
-  uint64_t len;
-  char buf[1024];
-
-  ticks = (unsigned int)sysconf(_SC_CLK_TCK);
-  assert(ticks != (unsigned int) -1);
-  assert(ticks != 0);
-  multiplier = ((uint64_t)1000L / ticks);
-
-  rewind(statfile_fp);
-
-  if (!fgets(buf, sizeof(buf), statfile_fp))
-    abort();
-
-  num = 0;
-
-  while (fgets(buf, sizeof(buf), statfile_fp)) {
-    if (num >= numcpus)
-      break;
-
-    if (strncmp(buf, "cpu", 3))
-      break;
-
-    /* skip "cpu<num> " marker */
-    {
-      unsigned int n;
-      int r = sscanf(buf, "cpu%u ", &n);
-      assert(r == 1);
-      (void) r;  /* silence build warning */
-      for (len = sizeof("cpu0"); n /= 10; len++);
-    }
-
-    /* Line contains user, nice, system, idle, iowait, irq, softirq, steal,
-     * guest, guest_nice but we're only interested in the first four + irq.
-     *
-     * Don't use %*s to skip fields or %ll to read straight into the uint64_t
-     * fields, they're not allowed in C89 mode.
-     */
-    if (6 != sscanf(buf + len,
-                    "%" PRIu64 " %" PRIu64 " %" PRIu64
-                    "%" PRIu64 " %" PRIu64 " %" PRIu64,
-                    &user,
-                    &nice,
-                    &sys,
-                    &idle,
-                    &dummy,
-                    &irq))
-      abort();
-
-    ts.user = user * multiplier;
-    ts.nice = nice * multiplier;
-    ts.sys  = sys * multiplier;
-    ts.idle = idle * multiplier;
-    ts.irq  = irq * multiplier;
-    ci[num++].cpu_times = ts;
-  }
-  assert(num == numcpus);
-
-  return 0;
-}
-
-
-static uint64_t read_cpufreq(unsigned int cpunum) {
-  uint64_t val;
-  char buf[1024];
-  FILE* fp;
-
-  snprintf(buf,
-           sizeof(buf),
-           "/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq",
-           cpunum);
-
-  fp = uv__open_file(buf);
-  if (fp == NULL)
-    return 0;
-
-  if (fscanf(fp, "%" PRIu64, &val) != 1)
-    val = 0;
-
-  fclose(fp);
-
-  return val;
-}
-
-
-#ifdef HAVE_IFADDRS_H
-static int uv__ifaddr_exclude(struct ifaddrs *ent, int exclude_type) {
-  if (!((ent->ifa_flags & IFF_UP) && (ent->ifa_flags & IFF_RUNNING)))
-    return 1;
-  if (ent->ifa_addr == NULL)
-    return 1;
-  /*
-   * On Linux getifaddrs returns information related to the raw underlying
-   * devices. We're not interested in this information yet.
-   */
-  if (ent->ifa_addr->sa_family == PF_PACKET)
-    return exclude_type;
-  return !exclude_type;
-}
-#endif
-
-int uv_interface_addresses(uv_interface_address_t** addresses, int* count) {
-#ifndef HAVE_IFADDRS_H
-  *count = 0;
-  *addresses = NULL;
-  return UV_ENOSYS;
-#else
-  struct ifaddrs *addrs, *ent;
-  uv_interface_address_t* address;
-  int i;
-  struct sockaddr_ll *sll;
-
-  *count = 0;
-  *addresses = NULL;
-
-  if (getifaddrs(&addrs))
-    return UV__ERR(errno);
-
-  /* Count the number of interfaces */
-  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
-    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
-      continue;
-
-    (*count)++;
-  }
-
-  if (*count == 0) {
-    freeifaddrs(addrs);
-    return 0;
-  }
-
-  /* Make sure the memory is initiallized to zero using calloc() */
-  *addresses = uv__calloc(*count, sizeof(**addresses));
-  if (!(*addresses)) {
-    freeifaddrs(addrs);
-    return UV_ENOMEM;
-  }
-
-  address = *addresses;
-
-  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
-    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFADDR))
-      continue;
-
-    address->name = uv__strdup(ent->ifa_name);
-
-    if (ent->ifa_addr->sa_family == AF_INET6) {
-      address->address.address6 = *((struct sockaddr_in6*) ent->ifa_addr);
-    } else {
-      address->address.address4 = *((struct sockaddr_in*) ent->ifa_addr);
-    }
-
-    if (ent->ifa_netmask->sa_family == AF_INET6) {
-      address->netmask.netmask6 = *((struct sockaddr_in6*) ent->ifa_netmask);
-    } else {
-      address->netmask.netmask4 = *((struct sockaddr_in*) ent->ifa_netmask);
-    }
-
-    address->is_internal = !!(ent->ifa_flags & IFF_LOOPBACK);
-
-    address++;
-  }
-
-  /* Fill in physical addresses for each interface */
-  for (ent = addrs; ent != NULL; ent = ent->ifa_next) {
-    if (uv__ifaddr_exclude(ent, UV__EXCLUDE_IFPHYS))
-      continue;
-
-    address = *addresses;
-
-    for (i = 0; i < (*count); i++) {
-      size_t namelen = strlen(ent->ifa_name);
-      /* Alias interface share the same physical address */
-      if (strncmp(address->name, ent->ifa_name, namelen) == 0 &&
-          (address->name[namelen] == 0 || address->name[namelen] == ':')) {
-        sll = (struct sockaddr_ll*)ent->ifa_addr;
-        memcpy(address->phys_addr, sll->sll_addr, sizeof(address->phys_addr));
-      }
-      address++;
-    }
-  }
-
-  freeifaddrs(addrs);
-
-  return 0;
-#endif
-}
-
-
-void uv_free_interface_addresses(uv_interface_address_t* addresses,
-  int count) {
-  int i;
-
-  for (i = 0; i < count; i++) {
-    uv__free(addresses[i].name);
-  }
-
-  uv__free(addresses);
-}
-
-
-void uv__set_process_title(const char* title) {
-#if defined(PR_SET_NAME)
-  prctl(PR_SET_NAME, title);  /* Only copies first 16 characters. */
-#endif
-}
-
-
-static uint64_t uv__read_proc_meminfo(const char* what) {
-  uint64_t rc;
-  char* p;
-  char buf[4096];  /* Large enough to hold all of /proc/meminfo. */
-
-  if (uv__slurp("/proc/meminfo", buf, sizeof(buf)))
-    return 0;
-
-  p = strstr(buf, what);
-
-  if (p == NULL)
-    return 0;
-
-  p += strlen(what);
-
-  rc = 0;
-  sscanf(p, "%" PRIu64 " kB", &rc);
-
-  return rc * 1024;
-}
-
-
-uint64_t uv_get_free_memory(void) {
-  struct sysinfo info;
-  uint64_t rc;
-
-  rc = uv__read_proc_meminfo("MemAvailable:");
-
-  if (rc != 0)
-    return rc;
-
-  if (0 == sysinfo(&info))
-    return (uint64_t) info.freeram * info.mem_unit;
-
-  return 0;
-}
-
-
-uint64_t uv_get_total_memory(void) {
-  struct sysinfo info;
-  uint64_t rc;
-
-  rc = uv__read_proc_meminfo("MemTotal:");
-
-  if (rc != 0)
-    return rc;
-
-  if (0 == sysinfo(&info))
-    return (uint64_t) info.totalram * info.mem_unit;
-
-  return 0;
-}
-
-
-static uint64_t uv__read_cgroups_uint64(const char* cgroup, const char* param) {
-  char filename[256];
-  char buf[32];  /* Large enough to hold an encoded uint64_t. */
-  uint64_t rc;
-
-  rc = 0;
-  snprintf(filename, sizeof(filename), "/sys/fs/cgroup/%s/%s", cgroup, param);
-  if (0 == uv__slurp(filename, buf, sizeof(buf)))
-    sscanf(buf, "%" PRIu64, &rc);
-
-  return rc;
-}
-
-
-uint64_t uv_get_constrained_memory(void) {
-  /*
-   * This might return 0 if there was a problem getting the memory limit from
-   * cgroups. This is OK because a return value of 0 signifies that the memory
-   * limit is unknown.
-   */
-  return uv__read_cgroups_uint64("memory", "memory.limit_in_bytes");
-}
-
-
-void uv_loadavg(double avg[3]) {
-  struct sysinfo info;
-  char buf[128];  /* Large enough to hold all of /proc/loadavg. */
-
-  if (0 == uv__slurp("/proc/loadavg", buf, sizeof(buf)))
-    if (3 == sscanf(buf, "%lf %lf %lf", &avg[0], &avg[1], &avg[2]))
-      return;
-
-  if (sysinfo(&info) < 0)
-    return;
-
-  avg[0] = (double) info.loads[0] / 65536.0;
-  avg[1] = (double) info.loads[1] / 65536.0;
-  avg[2] = (double) info.loads[2] / 65536.0;
-}

deps/libuv/src/unix/linux-inotify.c

@@ -1,327 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include "uv.h"
-#include "uv/tree.h"
-#include "internal.h"
-
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <errno.h>
-
-#include <sys/inotify.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-struct watcher_list {
-  RB_ENTRY(watcher_list) entry;
-  QUEUE watchers;
-  int iterating;
-  char* path;
-  int wd;
-};
-
-struct watcher_root {
-  struct watcher_list* rbh_root;
-};
-#define CAST(p) ((struct watcher_root*)(p))
-
-
-static int compare_watchers(const struct watcher_list* a,
-                            const struct watcher_list* b) {
-  if (a->wd < b->wd) return -1;
-  if (a->wd > b->wd) return 1;
-  return 0;
-}
-
-
-RB_GENERATE_STATIC(watcher_root, watcher_list, entry, compare_watchers)
-
-
-static void uv__inotify_read(uv_loop_t* loop,
-                             uv__io_t* w,
-                             unsigned int revents);
-
-static void maybe_free_watcher_list(struct watcher_list* w,
-                                    uv_loop_t* loop);
-
-static int init_inotify(uv_loop_t* loop) {
-  int fd;
-
-  if (loop->inotify_fd != -1)
-    return 0;
-
-  fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
-  if (fd < 0)
-    return UV__ERR(errno);
-
-  loop->inotify_fd = fd;
-  uv__io_init(&loop->inotify_read_watcher, uv__inotify_read, loop->inotify_fd);
-  uv__io_start(loop, &loop->inotify_read_watcher, POLLIN);
-
-  return 0;
-}
-
-
-int uv__inotify_fork(uv_loop_t* loop, void* old_watchers) {
-  /* Open the inotify_fd, and re-arm all the inotify watchers. */
-  int err;
-  struct watcher_list* tmp_watcher_list_iter;
-  struct watcher_list* watcher_list;
-  struct watcher_list tmp_watcher_list;
-  QUEUE queue;
-  QUEUE* q;
-  uv_fs_event_t* handle;
-  char* tmp_path;
-
-  if (old_watchers != NULL) {
-    /* We must restore the old watcher list to be able to close items
-     * out of it.
-     */
-    loop->inotify_watchers = old_watchers;
-
-    QUEUE_INIT(&tmp_watcher_list.watchers);
-    /* Note that the queue we use is shared with the start and stop()
-     * functions, making QUEUE_FOREACH unsafe to use. So we use the
-     * QUEUE_MOVE trick to safely iterate. Also don't free the watcher
-     * list until we're done iterating. c.f. uv__inotify_read.
-     */
-    RB_FOREACH_SAFE(watcher_list, watcher_root,
-                    CAST(&old_watchers), tmp_watcher_list_iter) {
-      watcher_list->iterating = 1;
-      QUEUE_MOVE(&watcher_list->watchers, &queue);
-      while (!QUEUE_EMPTY(&queue)) {
-        q = QUEUE_HEAD(&queue);
-        handle = QUEUE_DATA(q, uv_fs_event_t, watchers);
-        /* It's critical to keep a copy of path here, because it
-         * will be set to NULL by stop() and then deallocated by
-         * maybe_free_watcher_list
-         */
-        tmp_path = uv__strdup(handle->path);
-        assert(tmp_path != NULL);
-        QUEUE_REMOVE(q);
-        QUEUE_INSERT_TAIL(&watcher_list->watchers, q);
-        uv_fs_event_stop(handle);
-
-        QUEUE_INSERT_TAIL(&tmp_watcher_list.watchers, &handle->watchers);
-        handle->path = tmp_path;
-      }
-      watcher_list->iterating = 0;
-      maybe_free_watcher_list(watcher_list, loop);
-    }
-
-    QUEUE_MOVE(&tmp_watcher_list.watchers, &queue);
-    while (!QUEUE_EMPTY(&queue)) {
-        q = QUEUE_HEAD(&queue);
-        QUEUE_REMOVE(q);
-        handle = QUEUE_DATA(q, uv_fs_event_t, watchers);
-        tmp_path = handle->path;
-        handle->path = NULL;
-        err = uv_fs_event_start(handle, handle->cb, tmp_path, 0);
-        uv__free(tmp_path);
-        if (err)
-          return err;
-    }
-  }
-
-  return 0;
-}
-
-
-static struct watcher_list* find_watcher(uv_loop_t* loop, int wd) {
-  struct watcher_list w;
-  w.wd = wd;
-  return RB_FIND(watcher_root, CAST(&loop->inotify_watchers), &w);
-}
-
-static void maybe_free_watcher_list(struct watcher_list* w, uv_loop_t* loop) {
-  /* if the watcher_list->watchers is being iterated over, we can't free it. */
-  if ((!w->iterating) && QUEUE_EMPTY(&w->watchers)) {
-    /* No watchers left for this path. Clean up. */
-    RB_REMOVE(watcher_root, CAST(&loop->inotify_watchers), w);
-    inotify_rm_watch(loop->inotify_fd, w->wd);
-    uv__free(w);
-  }
-}
-
-static void uv__inotify_read(uv_loop_t* loop,
-                             uv__io_t* dummy,
-                             unsigned int events) {
-  const struct inotify_event* e;
-  struct watcher_list* w;
-  uv_fs_event_t* h;
-  QUEUE queue;
-  QUEUE* q;
-  const char* path;
-  ssize_t size;
-  const char *p;
-  /* needs to be large enough for sizeof(inotify_event) + strlen(path) */
-  char buf[4096];
-
-  for (;;) {
-    do
-      size = read(loop->inotify_fd, buf, sizeof(buf));
-    while (size == -1 && errno == EINTR);
-
-    if (size == -1) {
-      assert(errno == EAGAIN || errno == EWOULDBLOCK);
-      break;
-    }
-
-    assert(size > 0); /* pre-2.6.21 thing, size=0 == read buffer too small */
-
-    /* Now we have one or more inotify_event structs. */
-    for (p = buf; p < buf + size; p += sizeof(*e) + e->len) {
-      e = (const struct inotify_event*) p;
-
-      events = 0;
-      if (e->mask & (IN_ATTRIB|IN_MODIFY))
-        events |= UV_CHANGE;
-      if (e->mask & ~(IN_ATTRIB|IN_MODIFY))
-        events |= UV_RENAME;
-
-      w = find_watcher(loop, e->wd);
-      if (w == NULL)
-        continue; /* Stale event, no watchers left. */
-
-      /* inotify does not return the filename when monitoring a single file
-       * for modifications. Repurpose the filename for API compatibility.
-       * I'm not convinced this is a good thing, maybe it should go.
-       */
-      path = e->len ? (const char*) (e + 1) : uv__basename_r(w->path);
-
-      /* We're about to iterate over the queue and call user's callbacks.
-       * What can go wrong?
-       * A callback could call uv_fs_event_stop()
-       * and the queue can change under our feet.
-       * So, we use QUEUE_MOVE() trick to safely iterate over the queue.
-       * And we don't free the watcher_list until we're done iterating.
-       *
-       * First,
-       * tell uv_fs_event_stop() (that could be called from a user's callback)
-       * not to free watcher_list.
-       */
-      w->iterating = 1;
-      QUEUE_MOVE(&w->watchers, &queue);
-      while (!QUEUE_EMPTY(&queue)) {
-        q = QUEUE_HEAD(&queue);
-        h = QUEUE_DATA(q, uv_fs_event_t, watchers);
-
-        QUEUE_REMOVE(q);
-        QUEUE_INSERT_TAIL(&w->watchers, q);
-
-        h->cb(h, path, events, 0);
-      }
-      /* done iterating, time to (maybe) free empty watcher_list */
-      w->iterating = 0;
-      maybe_free_watcher_list(w, loop);
-    }
-  }
-}
-
-
-int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle) {
-  uv__handle_init(loop, (uv_handle_t*)handle, UV_FS_EVENT);
-  return 0;
-}
-
-
-int uv_fs_event_start(uv_fs_event_t* handle,
-                      uv_fs_event_cb cb,
-                      const char* path,
-                      unsigned int flags) {
-  struct watcher_list* w;
-  size_t len;
-  int events;
-  int err;
-  int wd;
-
-  if (uv__is_active(handle))
-    return UV_EINVAL;
-
-  err = init_inotify(handle->loop);
-  if (err)
-    return err;
-
-  events = IN_ATTRIB
-         | IN_CREATE
-         | IN_MODIFY
-         | IN_DELETE
-         | IN_DELETE_SELF
-         | IN_MOVE_SELF
-         | IN_MOVED_FROM
-         | IN_MOVED_TO;
-
-  wd = inotify_add_watch(handle->loop->inotify_fd, path, events);
-  if (wd == -1)
-    return UV__ERR(errno);
-
-  w = find_watcher(handle->loop, wd);
-  if (w)
-    goto no_insert;
-
-  len = strlen(path) + 1;
-  w = uv__malloc(sizeof(*w) + len);
-  if (w == NULL)
-    return UV_ENOMEM;
-
-  w->wd = wd;
-  w->path = memcpy(w + 1, path, len);
-  QUEUE_INIT(&w->watchers);
-  w->iterating = 0;
-  RB_INSERT(watcher_root, CAST(&handle->loop->inotify_watchers), w);
-
-no_insert:
-  uv__handle_start(handle);
-  QUEUE_INSERT_TAIL(&w->watchers, &handle->watchers);
-  handle->path = w->path;
-  handle->cb = cb;
-  handle->wd = wd;
-
-  return 0;
-}
-
-
-int uv_fs_event_stop(uv_fs_event_t* handle) {
-  struct watcher_list* w;
-
-  if (!uv__is_active(handle))
-    return 0;
-
-  w = find_watcher(handle->loop, handle->wd);
-  assert(w != NULL);
-
-  handle->wd = -1;
-  handle->path = NULL;
-  uv__handle_stop(handle);
-  QUEUE_REMOVE(&handle->watchers);
-
-  maybe_free_watcher_list(w, handle->loop);
-
-  return 0;
-}
-
-
-void uv__fs_event_close(uv_fs_event_t* handle) {
-  uv_fs_event_stop(handle);
-}

deps/libuv/src/unix/linux-syscalls.c

@@ -1,264 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#include "linux-syscalls.h"
-#include <unistd.h>
-#include <signal.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <errno.h>
-
-#if defined(__arm__)
-# if defined(__thumb__) || defined(__ARM_EABI__)
-#  define UV_SYSCALL_BASE 0
-# else
-#  define UV_SYSCALL_BASE 0x900000
-# endif
-#endif /* __arm__ */
-
-#ifndef __NR_recvmmsg
-# if defined(__x86_64__)
-#  define __NR_recvmmsg 299
-# elif defined(__arm__)
-#  define __NR_recvmmsg (UV_SYSCALL_BASE + 365)
-# endif
-#endif /* __NR_recvmsg */
-
-#ifndef __NR_sendmmsg
-# if defined(__x86_64__)
-#  define __NR_sendmmsg 307
-# elif defined(__arm__)
-#  define __NR_sendmmsg (UV_SYSCALL_BASE + 374)
-# endif
-#endif /* __NR_sendmmsg */
-
-#ifndef __NR_utimensat
-# if defined(__x86_64__)
-#  define __NR_utimensat 280
-# elif defined(__i386__)
-#  define __NR_utimensat 320
-# elif defined(__arm__)
-#  define __NR_utimensat (UV_SYSCALL_BASE + 348)
-# endif
-#endif /* __NR_utimensat */
-
-#ifndef __NR_preadv
-# if defined(__x86_64__)
-#  define __NR_preadv 295
-# elif defined(__i386__)
-#  define __NR_preadv 333
-# elif defined(__arm__)
-#  define __NR_preadv (UV_SYSCALL_BASE + 361)
-# endif
-#endif /* __NR_preadv */
-
-#ifndef __NR_pwritev
-# if defined(__x86_64__)
-#  define __NR_pwritev 296
-# elif defined(__i386__)
-#  define __NR_pwritev 334
-# elif defined(__arm__)
-#  define __NR_pwritev (UV_SYSCALL_BASE + 362)
-# endif
-#endif /* __NR_pwritev */
-
-#ifndef __NR_dup3
-# if defined(__x86_64__)
-#  define __NR_dup3 292
-# elif defined(__i386__)
-#  define __NR_dup3 330
-# elif defined(__arm__)
-#  define __NR_dup3 (UV_SYSCALL_BASE + 358)
-# endif
-#endif /* __NR_pwritev */
-
-#ifndef __NR_copy_file_range
-# if defined(__x86_64__)
-#  define __NR_copy_file_range 326
-# elif defined(__i386__)
-#  define __NR_copy_file_range 377
-# elif defined(__s390__)
-#  define __NR_copy_file_range 375
-# elif defined(__arm__)
-#  define __NR_copy_file_range (UV_SYSCALL_BASE + 391)
-# elif defined(__aarch64__)
-#  define __NR_copy_file_range 285
-# elif defined(__powerpc__)
-#  define __NR_copy_file_range 379
-# elif defined(__arc__)
-#  define __NR_copy_file_range 285
-# endif
-#endif /* __NR_copy_file_range */
-
-#ifndef __NR_statx
-# if defined(__x86_64__)
-#  define __NR_statx 332
-# elif defined(__i386__)
-#  define __NR_statx 383
-# elif defined(__aarch64__)
-#  define __NR_statx 397
-# elif defined(__arm__)
-#  define __NR_statx (UV_SYSCALL_BASE + 397)
-# elif defined(__ppc__)
-#  define __NR_statx 383
-# elif defined(__s390__)
-#  define __NR_statx 379
-# endif
-#endif /* __NR_statx */
-
-#ifndef __NR_getrandom
-# if defined(__x86_64__)
-#  define __NR_getrandom 318
-# elif defined(__i386__)
-#  define __NR_getrandom 355
-# elif defined(__aarch64__)
-#  define __NR_getrandom 384
-# elif defined(__arm__)
-#  define __NR_getrandom (UV_SYSCALL_BASE + 384)
-# elif defined(__ppc__)
-#  define __NR_getrandom 359
-# elif defined(__s390__)
-#  define __NR_getrandom 349
-# endif
-#endif /* __NR_getrandom */
-
-struct uv__mmsghdr;
-
-int uv__sendmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
-#if defined(__i386__)
-  unsigned long args[4];
-  int rc;
-
-  args[0] = (unsigned long) fd;
-  args[1] = (unsigned long) mmsg;
-  args[2] = (unsigned long) vlen;
-  args[3] = /* flags */ 0;
-
-  /* socketcall() raises EINVAL when SYS_SENDMMSG is not supported. */
-  rc = syscall(/* __NR_socketcall */ 102, 20 /* SYS_SENDMMSG */, args);
-  if (rc == -1)
-    if (errno == EINVAL)
-      errno = ENOSYS;
-
-  return rc;
-#elif defined(__NR_sendmmsg)
-  return syscall(__NR_sendmmsg, fd, mmsg, vlen, /* flags */ 0);
-#else
-  return errno = ENOSYS, -1;
-#endif
-}
-
-
-int uv__recvmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {
-#if defined(__i386__)
-  unsigned long args[5];
-  int rc;
-
-  args[0] = (unsigned long) fd;
-  args[1] = (unsigned long) mmsg;
-  args[2] = (unsigned long) vlen;
-  args[3] = /* flags */ 0;
-  args[4] = /* timeout */ 0;
-
-  /* socketcall() raises EINVAL when SYS_RECVMMSG is not supported. */
-  rc = syscall(/* __NR_socketcall */ 102, 19 /* SYS_RECVMMSG */, args);
-  if (rc == -1)
-    if (errno == EINVAL)
-      errno = ENOSYS;
-
-  return rc;
-#elif defined(__NR_recvmmsg)
-  return syscall(__NR_recvmmsg, fd, mmsg, vlen, /* flags */ 0, /* timeout */ 0);
-#else
-  return errno = ENOSYS, -1;
-#endif
-}
-
-
-ssize_t uv__preadv(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {
-#if !defined(__NR_preadv) || defined(__ANDROID_API__) && __ANDROID_API__ < 24
-  return errno = ENOSYS, -1;
-#else
-  return syscall(__NR_preadv, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
-#endif
-}
-
-
-ssize_t uv__pwritev(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {
-#if !defined(__NR_pwritev) || defined(__ANDROID_API__) && __ANDROID_API__ < 24
-  return errno = ENOSYS, -1;
-#else
-  return syscall(__NR_pwritev, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));
-#endif
-}
-
-
-int uv__dup3(int oldfd, int newfd, int flags) {
-#if !defined(__NR_dup3) || defined(__ANDROID_API__) && __ANDROID_API__ < 21
-  return errno = ENOSYS, -1;
-#else
-  return syscall(__NR_dup3, oldfd, newfd, flags);
-#endif
-}
-
-
-ssize_t
-uv__fs_copy_file_range(int fd_in,
-                       off_t* off_in,
-                       int fd_out,
-                       off_t* off_out,
-                       size_t len,
-                       unsigned int flags)
-{
-#ifdef __NR_copy_file_range
-  return syscall(__NR_copy_file_range,
-                 fd_in,
-                 off_in,
-                 fd_out,
-                 off_out,
-                 len,
-                 flags);
-#else
-  return errno = ENOSYS, -1;
-#endif
-}
-
-
-int uv__statx(int dirfd,
-              const char* path,
-              int flags,
-              unsigned int mask,
-              struct uv__statx* statxbuf) {
-#if !defined(__NR_statx) || defined(__ANDROID_API__) && __ANDROID_API__ < 30
-  return errno = ENOSYS, -1;
-#else
-  return syscall(__NR_statx, dirfd, path, flags, mask, statxbuf);
-#endif
-}
-
-
-ssize_t uv__getrandom(void* buf, size_t buflen, unsigned flags) {
-#if !defined(__NR_getrandom) || defined(__ANDROID_API__) && __ANDROID_API__ < 28
-  return errno = ENOSYS, -1;
-#else
-  return syscall(__NR_getrandom, buf, buflen, flags);
-#endif
-}

deps/libuv/src/unix/linux-syscalls.h

@@ -1,78 +0,0 @@
-/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#ifndef UV_LINUX_SYSCALL_H_
-#define UV_LINUX_SYSCALL_H_
-
-#include <stdint.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-struct uv__statx_timestamp {
-  int64_t tv_sec;
-  uint32_t tv_nsec;
-  int32_t unused0;
-};
-
-struct uv__statx {
-  uint32_t stx_mask;
-  uint32_t stx_blksize;
-  uint64_t stx_attributes;
-  uint32_t stx_nlink;
-  uint32_t stx_uid;
-  uint32_t stx_gid;
-  uint16_t stx_mode;
-  uint16_t unused0;
-  uint64_t stx_ino;
-  uint64_t stx_size;
-  uint64_t stx_blocks;
-  uint64_t stx_attributes_mask;
-  struct uv__statx_timestamp stx_atime;
-  struct uv__statx_timestamp stx_btime;
-  struct uv__statx_timestamp stx_ctime;
-  struct uv__statx_timestamp stx_mtime;
-  uint32_t stx_rdev_major;
-  uint32_t stx_rdev_minor;
-  uint32_t stx_dev_major;
-  uint32_t stx_dev_minor;
-  uint64_t unused1[14];
-};
-
-ssize_t uv__preadv(int fd, const struct iovec *iov, int iovcnt, int64_t offset);
-ssize_t uv__pwritev(int fd, const struct iovec *iov, int iovcnt, int64_t offset);
-int uv__dup3(int oldfd, int newfd, int flags);
-ssize_t
-uv__fs_copy_file_range(int fd_in,
-                       off_t* off_in,
-                       int fd_out,
-                       off_t* off_out,
-                       size_t len,
-                       unsigned int flags);
-int uv__statx(int dirfd,
-              const char* path,
-              int flags,
-              unsigned int mask,
-              struct uv__statx* statxbuf);
-ssize_t uv__getrandom(void* buf, size_t buflen, unsigned flags);
-
-#endif /* UV_LINUX_SYSCALL_H_ */

deps/libuv/src/unix/loop.c

@@ -45,6 +45,9 @@ int uv_loop_init(uv_loop_t* loop) {
   err = uv_mutex_init(&lfields->loop_metrics.lock);
   if (err)
     goto fail_metrics_mutex_init;
+  memset(&lfields->loop_metrics.metrics,
+         0,
+         sizeof(lfields->loop_metrics.metrics));
 
   heap_init((struct heap*) &loop->timer_heap);
   QUEUE_INIT(&loop->wq);
@@ -79,12 +82,9 @@ int uv_loop_init(uv_loop_t* loop) {
     goto fail_platform_init;
 
   uv__signal_global_once_init();
-  err = uv_signal_init(loop, &loop->child_watcher);
+  err = uv__process_init(loop);
   if (err)
     goto fail_signal_init;
-
-  uv__handle_unref(&loop->child_watcher);
-  loop->child_watcher.flags |= UV_HANDLE_INTERNAL;
   QUEUE_INIT(&loop->process_handles);
 
   err = uv_rwlock_init(&loop->cloexec_lock);

deps/libuv/src/unix/netbsd.c

@@ -103,7 +103,7 @@ uint64_t uv_get_free_memory(void) {
   int which[] = {CTL_VM, VM_UVMEXP};
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info.free * sysconf(_SC_PAGESIZE);
 }
@@ -120,7 +120,7 @@ uint64_t uv_get_total_memory(void) {
   size_t size = sizeof(info);
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info;
 }
@@ -131,6 +131,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 int uv_resident_set_memory(size_t* rss) {
   kvm_t *kd = NULL;
   struct kinfo_proc2 *kinfo = NULL;

deps/libuv/src/unix/openbsd.c

@@ -116,7 +116,7 @@ uint64_t uv_get_free_memory(void) {
   int which[] = {CTL_VM, VM_UVMEXP};
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info.free * sysconf(_SC_PAGESIZE);
 }
@@ -128,7 +128,7 @@ uint64_t uv_get_total_memory(void) {
   size_t size = sizeof(info);
 
   if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
-    return UV__ERR(errno);
+    return 0;
 
   return (uint64_t) info;
 }
@@ -139,6 +139,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 int uv_resident_set_memory(size_t* rss) {
   struct kinfo_proc kinfo;
   size_t page_size = getpagesize();

deps/libuv/src/unix/os390.c

@@ -198,6 +198,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 int uv_resident_set_memory(size_t* rss) {
   char* ascb;
   char* rax;
@@ -803,6 +808,7 @@ static int os390_message_queue_handler(uv__os390_epoll* ep) {
 
 void uv__io_poll(uv_loop_t* loop, int timeout) {
   static const int max_safe_timeout = 1789569;
+  uv__loop_internal_fields_t* lfields;
   struct epoll_event events[1024];
   struct epoll_event* pe;
   struct epoll_event e;
@@ -825,6 +831,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     return;
   }
 
+  lfields = uv__get_internal_fields(loop);
+
   while (!QUEUE_EMPTY(&loop->watcher_queue)) {
     uv_stream_t* stream;
 
@@ -872,7 +880,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
   int nevents = 0;
   have_signals = 0;
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -891,6 +899,12 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     if (sizeof(int32_t) == sizeof(long) && timeout >= max_safe_timeout)
       timeout = max_safe_timeout;
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     nfds = epoll_wait(loop->ep, events,
                       ARRAY_SIZE(events), timeout);
 
@@ -998,9 +1012,11 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       }
     }
 
+    uv__metrics_inc_events(loop, nevents);
     if (reset_timeout != 0) {
       timeout = user_timeout;
       reset_timeout = 0;
+      uv__metrics_inc_events_waiting(loop, nevents);
     }
 
     if (have_signals != 0) {

deps/libuv/src/unix/pipe.c

@@ -357,7 +357,7 @@ int uv_pipe_chmod(uv_pipe_t* handle, int mode) {
   }
 
   /* stat must be used as fstat has a bug on Darwin */
-  if (stat(name_buffer, &pipe_stat) == -1) {
+  if (uv__stat(name_buffer, &pipe_stat) == -1) {
     uv__free(name_buffer);
     return -errno;
   }

deps/libuv/src/unix/posix-hrtime.c

@@ -23,13 +23,14 @@
 #include "internal.h"
 
 #include <stdint.h>
+#include <stdlib.h>
 #include <time.h>
 
-#undef NANOSEC
-#define NANOSEC ((uint64_t) 1e9)
-
 uint64_t uv__hrtime(uv_clocktype_t type) {
-  struct timespec ts;
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  return (((uint64_t) ts.tv_sec) * NANOSEC + ts.tv_nsec);
+  struct timespec t;
+
+  if (clock_gettime(CLOCK_MONOTONIC, &t))
+    abort();
+
+  return t.tv_sec * (uint64_t) 1e9 + t.tv_nsec;
 }

deps/libuv/src/unix/posix-poll.c

@@ -132,6 +132,7 @@ static void uv__pollfds_del(uv_loop_t* loop, int fd) {
 
 
 void uv__io_poll(uv_loop_t* loop, int timeout) {
+  uv__loop_internal_fields_t* lfields;
   sigset_t* pset;
   sigset_t set;
   uint64_t time_base;
@@ -152,6 +153,8 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     return;
   }
 
+  lfields = uv__get_internal_fields(loop);
+
   /* Take queued watchers and add their fds to our poll fds array.  */
   while (!QUEUE_EMPTY(&loop->watcher_queue)) {
     q = QUEUE_HEAD(&loop->watcher_queue);
@@ -179,7 +182,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
   assert(timeout >= -1);
   time_base = loop->time;
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -198,6 +201,12 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
     if (timeout != 0)
       uv__metrics_set_provider_entry_time(loop);
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     if (pset != NULL)
       if (pthread_sigmask(SIG_BLOCK, pset, NULL))
         abort();
@@ -292,9 +301,11 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
       }
     }
 
+    uv__metrics_inc_events(loop, nevents);
     if (reset_timeout != 0) {
       timeout = user_timeout;
       reset_timeout = 0;
+      uv__metrics_inc_events_waiting(loop, nevents);
     }
 
     if (have_signals != 0) {

deps/libuv/src/unix/process.c

@@ -55,7 +55,7 @@
 extern char **environ;
 #endif
 
-#if defined(__linux__) || defined(__GLIBC__)
+#if defined(__linux__)
 # include <grp.h>
 #endif
 
@@ -79,8 +79,28 @@ static void uv__chld(uv_signal_t* handle, int signum) {
   assert(signum == SIGCHLD);
   uv__wait_children(handle->loop);
 }
+
+
+int uv__process_init(uv_loop_t* loop) {
+  int err;
+
+  err = uv_signal_init(loop, &loop->child_watcher);
+  if (err)
+    return err;
+  uv__handle_unref(&loop->child_watcher);
+  loop->child_watcher.flags |= UV_HANDLE_INTERNAL;
+  return 0;
+}
+
+
+#else
+int uv__process_init(uv_loop_t* loop) {
+  memset(&loop->child_watcher, 0, sizeof(loop->child_watcher));
+  return 0;
+}
 #endif
 
+
 void uv__wait_children(uv_loop_t* loop) {
   uv_process_t* process;
   int exit_status;
@@ -105,6 +125,7 @@ void uv__wait_children(uv_loop_t* loop) {
       continue;
     options = 0;
     process->flags &= ~UV_HANDLE_REAP;
+    loop->nfds--;
 #else
     options = WNOHANG;
 #endif
@@ -665,7 +686,7 @@ static int uv__spawn_resolve_and_spawn(const uv_process_options_t* options,
   if (options->file == NULL)
     return ENOENT;
 
-  /* The environment for the child process is that of the parent unless overriden
+  /* The environment for the child process is that of the parent unless overridden
    * by options->env */
   char** env = environ;
   if (options->env != NULL)
@@ -1012,6 +1033,10 @@ int uv_spawn(uv_loop_t* loop,
       process->flags |= UV_HANDLE_REAP;
       loop->flags |= UV_LOOP_REAP_CHILDREN;
     }
+    /* This prevents uv__io_poll() from bailing out prematurely, being unaware
+     * that we added an event here for it to react to. We will decrement this
+     * again after the waitpid call succeeds. */
+    loop->nfds++;
 #endif
 
     process->pid = pid;
@@ -1080,6 +1105,8 @@ int uv_kill(int pid, int signum) {
 void uv__process_close(uv_process_t* handle) {
   QUEUE_REMOVE(&handle->queue);
   uv__handle_stop(handle);
+#ifdef UV_USE_SIGCHLD
   if (QUEUE_EMPTY(&handle->loop->process_handles))
     uv_signal_stop(&handle->loop->child_watcher);
+#endif
 }

deps/libuv/src/unix/pthread-fixes.c

@@ -1,58 +0,0 @@
-/* Copyright (c) 2013, Sony Mobile Communications AB
- * Copyright (c) 2012, Google Inc.
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are
-   met:
-
-     * Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-       * Redistributions in binary form must reproduce the above
-   copyright notice, this list of conditions and the following disclaimer
-   in the documentation and/or other materials provided with the
-   distribution.
-       * Neither the name of Google Inc. nor the names of its
-   contributors may be used to endorse or promote products derived from
-   this software without specific prior written permission.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-/* Android versions < 4.1 have a broken pthread_sigmask. */
-#include "uv-common.h"
-
-#include <errno.h>
-#include <pthread.h>
-#include <signal.h>
-
-int uv__pthread_sigmask(int how, const sigset_t* set, sigset_t* oset) {
-  static int workaround;
-  int err;
-
-  if (uv__load_relaxed(&workaround)) {
-    return sigprocmask(how, set, oset);
-  } else {
-    err = pthread_sigmask(how, set, oset);
-    if (err) {
-      if (err == EINVAL && sigprocmask(how, set, oset) == 0) {
-        uv__store_relaxed(&workaround, 1);
-        return 0;
-      } else {
-        return -1;
-      }
-    }
-  }
-
-  return 0;
-}

deps/libuv/src/unix/qnx.c

@@ -88,6 +88,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 int uv_resident_set_memory(size_t* rss) {
   int fd;
   procfs_asinfo asinfo;

deps/libuv/src/unix/random-devurandom.c

@@ -40,7 +40,7 @@ int uv__random_readpath(const char* path, void* buf, size_t buflen) {
   if (fd < 0)
     return fd;
 
-  if (fstat(fd, &s)) {
+  if (uv__fstat(fd, &s)) {
     uv__close(fd);
     return UV__ERR(errno);
   }

deps/libuv/src/unix/random-getrandom.c

@@ -24,8 +24,6 @@
 
 #ifdef __linux__
 
-#include "linux-syscalls.h"
-
 #define uv__random_getrandom_init() 0
 
 #else  /* !__linux__ */

deps/libuv/src/unix/signal.c

@@ -279,6 +279,8 @@ static int uv__signal_loop_once_init(uv_loop_t* loop) {
 
 
 int uv__signal_loop_fork(uv_loop_t* loop) {
+  if (loop->signal_pipefd[0] == -1)
+    return 0;
   uv__io_stop(loop, &loop->signal_io_watcher, POLLIN);
   uv__close(loop->signal_pipefd[0]);
   uv__close(loop->signal_pipefd[1]);

deps/libuv/src/unix/spinlock.h

@@ -1,53 +0,0 @@
-/* Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#ifndef UV_SPINLOCK_H_
-#define UV_SPINLOCK_H_
-
-#include "internal.h"  /* ACCESS_ONCE, UV_UNUSED */
-#include "atomic-ops.h"
-
-#define UV_SPINLOCK_INITIALIZER { 0 }
-
-typedef struct {
-  int lock;
-} uv_spinlock_t;
-
-UV_UNUSED(static void uv_spinlock_init(uv_spinlock_t* spinlock));
-UV_UNUSED(static void uv_spinlock_lock(uv_spinlock_t* spinlock));
-UV_UNUSED(static void uv_spinlock_unlock(uv_spinlock_t* spinlock));
-UV_UNUSED(static int uv_spinlock_trylock(uv_spinlock_t* spinlock));
-
-UV_UNUSED(static void uv_spinlock_init(uv_spinlock_t* spinlock)) {
-  ACCESS_ONCE(int, spinlock->lock) = 0;
-}
-
-UV_UNUSED(static void uv_spinlock_lock(uv_spinlock_t* spinlock)) {
-  while (!uv_spinlock_trylock(spinlock)) cpu_relax();
-}
-
-UV_UNUSED(static void uv_spinlock_unlock(uv_spinlock_t* spinlock)) {
-  ACCESS_ONCE(int, spinlock->lock) = 0;
-}
-
-UV_UNUSED(static int uv_spinlock_trylock(uv_spinlock_t* spinlock)) {
-  /* TODO(bnoordhuis) Maybe change to a ticket lock to guarantee fair queueing.
-   * Not really critical until we have locks that are (frequently) contended
-   * for by several threads.
-   */
-  return 0 == cmpxchgi(&spinlock->lock, 0, 1);
-}
-
-#endif  /* UV_SPINLOCK_H_ */

deps/libuv/src/unix/stream.c

@@ -60,6 +60,16 @@ struct uv__stream_select_s {
 };
 #endif /* defined(__APPLE__) */
 
+union uv__cmsg {
+  struct cmsghdr hdr;
+  /* This cannot be larger because of the IBMi PASE limitation that
+   * the total size of control messages cannot exceed 256 bytes.
+   */
+  char pad[256];
+};
+
+STATIC_ASSERT(256 == sizeof(union uv__cmsg));
+
 static void uv__stream_connect(uv_stream_t*);
 static void uv__write(uv_stream_t* stream);
 static void uv__read(uv_stream_t* stream);
@@ -495,76 +505,34 @@ static int uv__emfile_trick(uv_loop_t* loop, int accept_fd) {
 }
 
 
-#if defined(UV_HAVE_KQUEUE)
-# define UV_DEC_BACKLOG(w) w->rcount--;
-#else
-# define UV_DEC_BACKLOG(w) /* no-op */
-#endif /* defined(UV_HAVE_KQUEUE) */
-
-
 void uv__server_io(uv_loop_t* loop, uv__io_t* w, unsigned int events) {
   uv_stream_t* stream;
   int err;
+  int fd;
 
   stream = container_of(w, uv_stream_t, io_watcher);
   assert(events & POLLIN);
   assert(stream->accepted_fd == -1);
   assert(!(stream->flags & UV_HANDLE_CLOSING));
 
-  uv__io_start(stream->loop, &stream->io_watcher, POLLIN);
+  fd = uv__stream_fd(stream);
+  err = uv__accept(fd);
 
-  /* connection_cb can close the server socket while we're
-   * in the loop so check it on each iteration.
-   */
-  while (uv__stream_fd(stream) != -1) {
-    assert(stream->accepted_fd == -1);
+  if (err == UV_EMFILE || err == UV_ENFILE)
+    err = uv__emfile_trick(loop, fd);  /* Shed load. */
 
-#if defined(UV_HAVE_KQUEUE)
-    if (w->rcount <= 0)
-      return;
-#endif /* defined(UV_HAVE_KQUEUE) */
+  if (err < 0)
+    return;
 
-    err = uv__accept(uv__stream_fd(stream));
-    if (err < 0) {
-      if (err == UV_EAGAIN || err == UV__ERR(EWOULDBLOCK))
-        return;  /* Not an error. */
+  stream->accepted_fd = err;
+  stream->connection_cb(stream, 0);
 
-      if (err == UV_ECONNABORTED)
-        continue;  /* Ignore. Nothing we can do about that. */
-
-      if (err == UV_EMFILE || err == UV_ENFILE) {
-        err = uv__emfile_trick(loop, uv__stream_fd(stream));
-        if (err == UV_EAGAIN || err == UV__ERR(EWOULDBLOCK))
-          break;
-      }
-
-      stream->connection_cb(stream, err);
-      continue;
-    }
-
-    UV_DEC_BACKLOG(w)
-    stream->accepted_fd = err;
-    stream->connection_cb(stream, 0);
-
-    if (stream->accepted_fd != -1) {
-      /* The user hasn't yet accepted called uv_accept() */
-      uv__io_stop(loop, &stream->io_watcher, POLLIN);
-      return;
-    }
-
-    if (stream->type == UV_TCP &&
-        (stream->flags & UV_HANDLE_TCP_SINGLE_ACCEPT)) {
-      /* Give other processes a chance to accept connections. */
-      struct timespec timeout = { 0, 1 };
-      nanosleep(&timeout, NULL);
-    }
-  }
+  if (stream->accepted_fd != -1)
+    /* The user hasn't yet accepted called uv_accept() */
+    uv__io_stop(loop, &stream->io_watcher, POLLIN);
 }
 
 
-#undef UV_DEC_BACKLOG
-
-
 int uv_accept(uv_stream_t* server, uv_stream_t* client) {
   int err;
 
@@ -665,7 +633,7 @@ static void uv__drain(uv_stream_t* stream) {
     uv__stream_osx_interrupt_select(stream);
   }
 
-  if (!(stream->flags & UV_HANDLE_SHUTTING))
+  if (!uv__is_stream_shutting(stream))
     return;
 
   req = stream->shutdown_req;
@@ -674,7 +642,6 @@ static void uv__drain(uv_stream_t* stream) {
   if ((stream->flags & UV_HANDLE_CLOSING) ||
       !(stream->flags & UV_HANDLE_SHUT)) {
     stream->shutdown_req = NULL;
-    stream->flags &= ~UV_HANDLE_SHUTTING;
     uv__req_unregister(stream->loop, req);
 
     err = 0;
@@ -812,18 +779,14 @@ static int uv__try_write(uv_stream_t* stream,
   if (send_handle != NULL) {
     int fd_to_send;
     struct msghdr msg;
-    struct cmsghdr *cmsg;
-    union {
-      char data[64];
-      struct cmsghdr alias;
-    } scratch;
+    union uv__cmsg cmsg;
 
     if (uv__is_closing(send_handle))
       return UV_EBADF;
 
     fd_to_send = uv__handle_fd((uv_handle_t*) send_handle);
 
-    memset(&scratch, 0, sizeof(scratch));
+    memset(&cmsg, 0, sizeof(cmsg));
 
     assert(fd_to_send >= 0);
 
@@ -833,20 +796,13 @@ static int uv__try_write(uv_stream_t* stream,
     msg.msg_iovlen = iovcnt;
     msg.msg_flags = 0;
 
-    msg.msg_control = &scratch.alias;
+    msg.msg_control = &cmsg.hdr;
     msg.msg_controllen = CMSG_SPACE(sizeof(fd_to_send));
 
-    cmsg = CMSG_FIRSTHDR(&msg);
-    cmsg->cmsg_level = SOL_SOCKET;
-    cmsg->cmsg_type = SCM_RIGHTS;
-    cmsg->cmsg_len = CMSG_LEN(sizeof(fd_to_send));
-
-    /* silence aliasing warning */
-    {
-      void* pv = CMSG_DATA(cmsg);
-      int* pi = pv;
-      *pi = fd_to_send;
-    }
+    cmsg.hdr.cmsg_level = SOL_SOCKET;
+    cmsg.hdr.cmsg_type = SCM_RIGHTS;
+    cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(fd_to_send));
+    memcpy(CMSG_DATA(&cmsg.hdr), &fd_to_send, sizeof(fd_to_send));
 
     do
       n = sendmsg(uv__stream_fd(stream), &msg, 0);
@@ -884,9 +840,16 @@ static void uv__write(uv_stream_t* stream) {
   QUEUE* q;
   uv_write_t* req;
   ssize_t n;
+  int count;
 
   assert(uv__stream_fd(stream) >= 0);
 
+  /* Prevent loop starvation when the consumer of this stream read as fast as
+   * (or faster than) we can write it. This `count` mechanism does not need to
+   * change even if we switch to edge-triggered I/O.
+   */
+  count = 32;
+
   for (;;) {
     if (QUEUE_EMPTY(&stream->write_queue))
       return;
@@ -905,10 +868,13 @@ static void uv__write(uv_stream_t* stream) {
       req->send_handle = NULL;
       if (uv__write_req_update(stream, req, n)) {
         uv__write_req_finish(req);
-        return;  /* TODO(bnoordhuis) Start trying to write the next request. */
+        if (count-- > 0)
+          continue; /* Start trying to write the next request. */
+
+        return;
       }
     } else if (n != UV_EAGAIN)
-      break;
+      goto error;
 
     /* If this is a blocking stream, try again. */
     if (stream->flags & UV_HANDLE_BLOCKING_WRITES)
@@ -923,6 +889,7 @@ static void uv__write(uv_stream_t* stream) {
     return;
   }
 
+error:
   req->error = n;
   uv__write_req_finish(req);
   uv__io_stop(stream->loop, &stream->io_watcher, POLLOUT);
@@ -1010,57 +977,38 @@ static int uv__stream_queue_fd(uv_stream_t* stream, int fd) {
 }
 
 
-#if defined(__PASE__)
-/* on IBMi PASE the control message length can not exceed 256. */
-# define UV__CMSG_FD_COUNT 60
-#else
-# define UV__CMSG_FD_COUNT 64
-#endif
-#define UV__CMSG_FD_SIZE (UV__CMSG_FD_COUNT * sizeof(int))
-
-
 static int uv__stream_recv_cmsg(uv_stream_t* stream, struct msghdr* msg) {
   struct cmsghdr* cmsg;
+  int fd;
+  int err;
+  size_t i;
+  size_t count;
 
   for (cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) {
-    char* start;
-    char* end;
-    int err;
-    void* pv;
-    int* pi;
-    unsigned int i;
-    unsigned int count;
-
     if (cmsg->cmsg_type != SCM_RIGHTS) {
       fprintf(stderr, "ignoring non-SCM_RIGHTS ancillary data: %d\n",
           cmsg->cmsg_type);
       continue;
     }
 
-    /* silence aliasing warning */
-    pv = CMSG_DATA(cmsg);
-    pi = pv;
-
-    /* Count available fds */
-    start = (char*) cmsg;
-    end = (char*) cmsg + cmsg->cmsg_len;
-    count = 0;
-    while (start + CMSG_LEN(count * sizeof(*pi)) < end)
-      count++;
-    assert(start + CMSG_LEN(count * sizeof(*pi)) == end);
+    assert(cmsg->cmsg_len >= CMSG_LEN(0));
+    count = cmsg->cmsg_len - CMSG_LEN(0);
+    assert(count % sizeof(fd) == 0);
+    count /= sizeof(fd);
 
     for (i = 0; i < count; i++) {
+      memcpy(&fd, (char*) CMSG_DATA(cmsg) + i * sizeof(fd), sizeof(fd));
       /* Already has accepted fd, queue now */
       if (stream->accepted_fd != -1) {
-        err = uv__stream_queue_fd(stream, pi[i]);
+        err = uv__stream_queue_fd(stream, fd);
         if (err != 0) {
           /* Close rest */
           for (; i < count; i++)
-            uv__close(pi[i]);
+            uv__close(fd);
           return err;
         }
       } else {
-        stream->accepted_fd = pi[i];
+        stream->accepted_fd = fd;
       }
     }
   }
@@ -1069,17 +1017,11 @@ static int uv__stream_recv_cmsg(uv_stream_t* stream, struct msghdr* msg) {
 }
 
 
-#ifdef __clang__
-# pragma clang diagnostic push
-# pragma clang diagnostic ignored "-Wgnu-folding-constant"
-# pragma clang diagnostic ignored "-Wvla-extension"
-#endif
-
 static void uv__read(uv_stream_t* stream) {
   uv_buf_t buf;
   ssize_t nread;
   struct msghdr msg;
-  char cmsg_space[CMSG_SPACE(UV__CMSG_FD_SIZE)];
+  union uv__cmsg cmsg;
   int count;
   int err;
   int is_ipc;
@@ -1125,8 +1067,8 @@ static void uv__read(uv_stream_t* stream) {
       msg.msg_name = NULL;
       msg.msg_namelen = 0;
       /* Set up to receive a descriptor even if one isn't in the message */
-      msg.msg_controllen = sizeof(cmsg_space);
-      msg.msg_control = cmsg_space;
+      msg.msg_controllen = sizeof(cmsg);
+      msg.msg_control = &cmsg.hdr;
 
       do {
         nread = uv__recvmsg(uv__stream_fd(stream), &msg, 0);
@@ -1210,14 +1152,6 @@ static void uv__read(uv_stream_t* stream) {
 }
 
 
-#ifdef __clang__
-# pragma clang diagnostic pop
-#endif
-
-#undef UV__CMSG_FD_COUNT
-#undef UV__CMSG_FD_SIZE
-
-
 int uv_shutdown(uv_shutdown_t* req, uv_stream_t* stream, uv_shutdown_cb cb) {
   assert(stream->type == UV_TCP ||
          stream->type == UV_TTY ||
@@ -1225,7 +1159,7 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* stream, uv_shutdown_cb cb) {
 
   if (!(stream->flags & UV_HANDLE_WRITABLE) ||
       stream->flags & UV_HANDLE_SHUT ||
-      stream->flags & UV_HANDLE_SHUTTING ||
+      uv__is_stream_shutting(stream) ||
       uv__is_closing(stream)) {
     return UV_ENOTCONN;
   }
@@ -1238,7 +1172,6 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* stream, uv_shutdown_cb cb) {
   req->handle = stream;
   req->cb = cb;
   stream->shutdown_req = req;
-  stream->flags |= UV_HANDLE_SHUTTING;
   stream->flags &= ~UV_HANDLE_WRITABLE;
 
   if (QUEUE_EMPTY(&stream->write_queue))

deps/libuv/src/unix/sunos.c

@@ -320,9 +320,11 @@ void uv__io_poll(uv_loop_t* loop, int timeout) {
         QUEUE_INSERT_TAIL(&loop->watcher_queue, &w->watcher_queue);
     }
 
+    uv__metrics_inc_events(loop, nevents);
     if (reset_timeout != 0) {
       timeout = user_timeout;
       reset_timeout = 0;
+      uv__metrics_inc_events_waiting(loop, nevents);
     }
 
     if (have_signals != 0) {
@@ -415,6 +417,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 void uv_loadavg(double avg[3]) {
   (void) getloadavg(avg, 3);
 }

deps/libuv/src/unix/tcp.c

@@ -28,16 +28,39 @@
 #include <errno.h>
 
 
-static int new_socket(uv_tcp_t* handle, int domain, unsigned long flags) {
-  struct sockaddr_storage saddr;
+static int maybe_bind_socket(int fd) {
+  union uv__sockaddr s;
   socklen_t slen;
+
+  slen = sizeof(s);
+  memset(&s, 0, sizeof(s));
+
+  if (getsockname(fd, &s.addr, &slen))
+    return UV__ERR(errno);
+
+  if (s.addr.sa_family == AF_INET)
+    if (s.in.sin_port != 0)
+      return 0;  /* Already bound to a port. */
+
+  if (s.addr.sa_family == AF_INET6)
+    if (s.in6.sin6_port != 0)
+      return 0;  /* Already bound to a port. */
+
+  /* Bind to an arbitrary port. */
+  if (bind(fd, &s.addr, slen))
+    return UV__ERR(errno);
+
+  return 0;
+}
+
+
+static int new_socket(uv_tcp_t* handle, int domain, unsigned int flags) {
   int sockfd;
   int err;
 
-  err = uv__socket(domain, SOCK_STREAM, 0);
-  if (err < 0)
-    return err;
-  sockfd = err;
+  sockfd = uv__socket(domain, SOCK_STREAM, 0);
+  if (sockfd < 0)
+    return sockfd;
 
   err = uv__stream_open((uv_stream_t*) handle, sockfd, flags);
   if (err) {
@@ -45,74 +68,44 @@ static int new_socket(uv_tcp_t* handle, int domain, unsigned long flags) {
     return err;
   }
 
-  if (flags & UV_HANDLE_BOUND) {
-    /* Bind this new socket to an arbitrary port */
-    slen = sizeof(saddr);
-    memset(&saddr, 0, sizeof(saddr));
-    if (getsockname(uv__stream_fd(handle), (struct sockaddr*) &saddr, &slen)) {
-      uv__close(sockfd);
-      return UV__ERR(errno);
-    }
-
-    if (bind(uv__stream_fd(handle), (struct sockaddr*) &saddr, slen)) {
-      uv__close(sockfd);
-      return UV__ERR(errno);
-    }
-  }
+  if (flags & UV_HANDLE_BOUND)
+    return maybe_bind_socket(sockfd);
 
   return 0;
 }
 
 
-static int maybe_new_socket(uv_tcp_t* handle, int domain, unsigned long flags) {
-  struct sockaddr_storage saddr;
-  socklen_t slen;
+static int maybe_new_socket(uv_tcp_t* handle, int domain, unsigned int flags) {
+  int sockfd;
+  int err;
 
-  if (domain == AF_UNSPEC) {
-    handle->flags |= flags;
-    return 0;
-  }
+  if (domain == AF_UNSPEC)
+    goto out;
 
-  if (uv__stream_fd(handle) != -1) {
+  sockfd = uv__stream_fd(handle);
+  if (sockfd == -1)
+    return new_socket(handle, domain, flags);
 
-    if (flags & UV_HANDLE_BOUND) {
+  if (!(flags & UV_HANDLE_BOUND))
+    goto out;
 
-      if (handle->flags & UV_HANDLE_BOUND) {
-        /* It is already bound to a port. */
-        handle->flags |= flags;
-        return 0;
-      }
+  if (handle->flags & UV_HANDLE_BOUND)
+    goto out;  /* Already bound to a port. */
 
-      /* Query to see if tcp socket is bound. */
-      slen = sizeof(saddr);
-      memset(&saddr, 0, sizeof(saddr));
-      if (getsockname(uv__stream_fd(handle), (struct sockaddr*) &saddr, &slen))
-        return UV__ERR(errno);
+  err = maybe_bind_socket(sockfd);
+  if (err)
+    return err;
 
-      if ((saddr.ss_family == AF_INET6 &&
-          ((struct sockaddr_in6*) &saddr)->sin6_port != 0) ||
-          (saddr.ss_family == AF_INET &&
-          ((struct sockaddr_in*) &saddr)->sin_port != 0)) {
-        /* Handle is already bound to a port. */
-        handle->flags |= flags;
-        return 0;
-      }
+out:
 
-      /* Bind to arbitrary port */
-      if (bind(uv__stream_fd(handle), (struct sockaddr*) &saddr, slen))
-        return UV__ERR(errno);
-    }
-
-    handle->flags |= flags;
-    return 0;
-  }
-
-  return new_socket(handle, domain, flags);
+  handle->flags |= flags;
+  return 0;
 }
 
 
 int uv_tcp_init_ex(uv_loop_t* loop, uv_tcp_t* tcp, unsigned int flags) {
   int domain;
+  int err;
 
   /* Use the lower 8 bits for the domain */
   domain = flags & 0xFF;
@@ -129,9 +122,12 @@ int uv_tcp_init_ex(uv_loop_t* loop, uv_tcp_t* tcp, unsigned int flags) {
    */
 
   if (domain != AF_UNSPEC) {
-    int err = maybe_new_socket(tcp, domain, 0);
+    err = new_socket(tcp, domain, 0);
     if (err) {
       QUEUE_REMOVE(&tcp->handle_queue);
+      if (tcp->io_watcher.fd != -1)
+        uv__close(tcp->io_watcher.fd);
+      tcp->io_watcher.fd = -1;
       return err;
     }
   }
@@ -317,7 +313,7 @@ int uv_tcp_close_reset(uv_tcp_t* handle, uv_close_cb close_cb) {
   struct linger l = { 1, 0 };
 
   /* Disallow setting SO_LINGER to zero due to some platform inconsistencies */
-  if (handle->flags & UV_HANDLE_SHUTTING)
+  if (uv__is_stream_shutting(handle))
     return UV_EINVAL;
 
   fd = uv__stream_fd(handle);
@@ -338,24 +334,12 @@ int uv_tcp_close_reset(uv_tcp_t* handle, uv_close_cb close_cb) {
 
 
 int uv__tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb) {
-  static int single_accept_cached = -1;
-  unsigned long flags;
-  int single_accept;
+  unsigned int flags;
   int err;
 
   if (tcp->delayed_error)
     return tcp->delayed_error;
 
-  single_accept = uv__load_relaxed(&single_accept_cached);
-  if (single_accept == -1) {
-    const char* val = getenv("UV_TCP_SINGLE_ACCEPT");
-    single_accept = (val != NULL && atoi(val) != 0);  /* Off by default. */
-    uv__store_relaxed(&single_accept_cached, single_accept);
-  }
-
-  if (single_accept)
-    tcp->flags |= UV_HANDLE_TCP_SINGLE_ACCEPT;
-
   flags = 0;
 #if defined(__MVS__)
   /* on zOS the listen call does not bind automatically
@@ -460,10 +444,6 @@ int uv_tcp_keepalive(uv_tcp_t* handle, int on, unsigned int delay) {
 
 
 int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable) {
-  if (enable)
-    handle->flags &= ~UV_HANDLE_TCP_SINGLE_ACCEPT;
-  else
-    handle->flags |= UV_HANDLE_TCP_SINGLE_ACCEPT;
   return 0;
 }
 

deps/libuv/src/unix/thread.c

@@ -41,127 +41,20 @@
 #include <gnu/libc-version.h>  /* gnu_get_libc_version() */
 #endif
 
+#if defined(__linux__)
+# include <sched.h>
+# define uv__cpu_set_t cpu_set_t
+#elif defined(__FreeBSD__)
+# include <sys/param.h>
+# include <sys/cpuset.h>
+# include <pthread_np.h>
+# define uv__cpu_set_t cpuset_t
+#endif
+
+
 #undef NANOSEC
 #define NANOSEC ((uint64_t) 1e9)
 
-#if defined(PTHREAD_BARRIER_SERIAL_THREAD)
-STATIC_ASSERT(sizeof(uv_barrier_t) == sizeof(pthread_barrier_t));
-#endif
-
-/* Note: guard clauses should match uv_barrier_t's in include/uv/unix.h. */
-#if defined(_AIX) || \
-    defined(__OpenBSD__) || \
-    !defined(PTHREAD_BARRIER_SERIAL_THREAD)
-int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
-  struct _uv_barrier* b;
-  int rc;
-
-  if (barrier == NULL || count == 0)
-    return UV_EINVAL;
-
-  b = uv__malloc(sizeof(*b));
-  if (b == NULL)
-    return UV_ENOMEM;
-
-  b->in = 0;
-  b->out = 0;
-  b->threshold = count;
-
-  rc = uv_mutex_init(&b->mutex);
-  if (rc != 0)
-    goto error2;
-
-  rc = uv_cond_init(&b->cond);
-  if (rc != 0)
-    goto error;
-
-  barrier->b = b;
-  return 0;
-
-error:
-  uv_mutex_destroy(&b->mutex);
-error2:
-  uv__free(b);
-  return rc;
-}
-
-
-int uv_barrier_wait(uv_barrier_t* barrier) {
-  struct _uv_barrier* b;
-  int last;
-
-  if (barrier == NULL || barrier->b == NULL)
-    return UV_EINVAL;
-
-  b = barrier->b;
-  uv_mutex_lock(&b->mutex);
-
-  if (++b->in == b->threshold) {
-    b->in = 0;
-    b->out = b->threshold;
-    uv_cond_signal(&b->cond);
-  } else {
-    do
-      uv_cond_wait(&b->cond, &b->mutex);
-    while (b->in != 0);
-  }
-
-  last = (--b->out == 0);
-  uv_cond_signal(&b->cond);
-
-  uv_mutex_unlock(&b->mutex);
-  return last;
-}
-
-
-void uv_barrier_destroy(uv_barrier_t* barrier) {
-  struct _uv_barrier* b;
-
-  b = barrier->b;
-  uv_mutex_lock(&b->mutex);
-
-  assert(b->in == 0);
-  while (b->out != 0)
-    uv_cond_wait(&b->cond, &b->mutex);
-
-  if (b->in != 0)
-    abort();
-
-  uv_mutex_unlock(&b->mutex);
-  uv_mutex_destroy(&b->mutex);
-  uv_cond_destroy(&b->cond);
-
-  uv__free(barrier->b);
-  barrier->b = NULL;
-}
-
-#else
-
-int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
-  return UV__ERR(pthread_barrier_init(barrier, NULL, count));
-}
-
-
-int uv_barrier_wait(uv_barrier_t* barrier) {
-  int rc;
-
-  rc = pthread_barrier_wait(barrier);
-  if (rc != 0)
-    if (rc != PTHREAD_BARRIER_SERIAL_THREAD)
-      abort();
-
-  return rc == PTHREAD_BARRIER_SERIAL_THREAD;
-}
-
-
-void uv_barrier_destroy(uv_barrier_t* barrier) {
-  if (pthread_barrier_destroy(barrier))
-    abort();
-}
-
-#endif
-
-
 /* Musl's PTHREAD_STACK_MIN is 2 KB on all architectures, which is
  * too small to safely receive signals on.
  *
@@ -284,6 +177,106 @@ int uv_thread_create_ex(uv_thread_t* tid,
   return UV__ERR(err);
 }
 
+#if UV__CPU_AFFINITY_SUPPORTED
+
+int uv_thread_setaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          char* oldmask,
+                          size_t mask_size) {
+  int i;
+  int r;
+  uv__cpu_set_t cpuset;
+  int cpumasksize;
+
+  cpumasksize = uv_cpumask_size();
+  if (cpumasksize < 0)
+    return cpumasksize;
+  if (mask_size < (size_t)cpumasksize)
+    return UV_EINVAL;
+
+  if (oldmask != NULL) {
+    r = uv_thread_getaffinity(tid, oldmask, mask_size);
+    if (r < 0)
+      return r;
+  }
+
+  CPU_ZERO(&cpuset);
+  for (i = 0; i < cpumasksize; i++)
+    if (cpumask[i])
+      CPU_SET(i, &cpuset);
+
+#if defined(__ANDROID__)
+  if (sched_setaffinity(pthread_gettid_np(*tid), sizeof(cpuset), &cpuset))
+    r = errno;
+  else
+    r = 0;
+#else
+  r = pthread_setaffinity_np(*tid, sizeof(cpuset), &cpuset);
+#endif
+
+  return UV__ERR(r);
+}
+
+
+int uv_thread_getaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          size_t mask_size) {
+  int r;
+  int i;
+  uv__cpu_set_t cpuset;
+  int cpumasksize;
+
+  cpumasksize = uv_cpumask_size();
+  if (cpumasksize < 0)
+    return cpumasksize;
+  if (mask_size < (size_t)cpumasksize)
+    return UV_EINVAL;
+
+  CPU_ZERO(&cpuset);
+#if defined(__ANDROID__)
+  if (sched_getaffinity(pthread_gettid_np(*tid), sizeof(cpuset), &cpuset))
+    r = errno;
+  else
+    r = 0;
+#else
+  r = pthread_getaffinity_np(*tid, sizeof(cpuset), &cpuset);
+#endif
+  if (r)
+    return UV__ERR(r);
+  for (i = 0; i < cpumasksize; i++)
+    cpumask[i] = !!CPU_ISSET(i, &cpuset);
+
+  return 0;
+}
+#else
+int uv_thread_setaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          char* oldmask,
+                          size_t mask_size) {
+  return UV_ENOTSUP;
+}
+
+
+int uv_thread_getaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          size_t mask_size) {
+  return UV_ENOTSUP;
+}
+#endif /* defined(__linux__) || defined(UV_BSD_H) */
+
+int uv_thread_getcpu(void) {
+#if UV__CPU_AFFINITY_SUPPORTED
+  int cpu;
+
+  cpu = sched_getcpu();
+  if (cpu < 0)
+    return UV__ERR(errno);
+
+  return cpu;
+#else
+  return UV_ENOTSUP;
+#endif
+}
 
 uv_thread_t uv_thread_self(void) {
   return pthread_self();
@@ -585,7 +578,7 @@ static void uv__custom_sem_post(uv_sem_t* sem_) {
   uv_mutex_lock(&sem->mutex);
   sem->value++;
   if (sem->value == 1)
-    uv_cond_signal(&sem->cond);
+    uv_cond_signal(&sem->cond); /* Release one to replace us. */
   uv_mutex_unlock(&sem->mutex);
 }
 

deps/libuv/src/unix/tty.c

@@ -21,8 +21,8 @@
 
 #include "uv.h"
 #include "internal.h"
-#include "spinlock.h"
 
+#include <stdatomic.h>
 #include <stdlib.h>
 #include <assert.h>
 #include <unistd.h>
@@ -64,7 +64,7 @@ static int isreallyatty(int file) {
 
 static int orig_termios_fd = -1;
 static struct termios orig_termios;
-static uv_spinlock_t termios_spinlock = UV_SPINLOCK_INITIALIZER;
+static _Atomic int termios_spinlock;
 
 int uv__tcsetattr(int fd, int how, const struct termios *term) {
   int rc;
@@ -81,7 +81,7 @@ int uv__tcsetattr(int fd, int how, const struct termios *term) {
 
 static int uv__tty_is_slave(const int fd) {
   int result;
-#if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#if defined(__linux__) || defined(__FreeBSD__)
   int dummy;
 
   result = ioctl(fd, TIOCGPTN, &dummy) != 0;
@@ -113,7 +113,7 @@ static int uv__tty_is_slave(const int fd) {
   }
 
   /* Lookup stat structure behind the file descriptor. */
-  if (fstat(fd, &sb) != 0)
+  if (uv__fstat(fd, &sb) != 0)
     abort();
 
   /* Assert character device. */
@@ -280,6 +280,7 @@ static void uv__tty_make_raw(struct termios* tio) {
 
 int uv_tty_set_mode(uv_tty_t* tty, uv_tty_mode_t mode) {
   struct termios tmp;
+  int expected;
   int fd;
   int rc;
 
@@ -296,12 +297,16 @@ int uv_tty_set_mode(uv_tty_t* tty, uv_tty_mode_t mode) {
       return UV__ERR(errno);
 
     /* This is used for uv_tty_reset_mode() */
-    uv_spinlock_lock(&termios_spinlock);
+    do
+      expected = 0;
+    while (!atomic_compare_exchange_strong(&termios_spinlock, &expected, 1));
+
     if (orig_termios_fd == -1) {
       orig_termios = tty->orig_termios;
       orig_termios_fd = fd;
     }
-    uv_spinlock_unlock(&termios_spinlock);
+
+    atomic_store(&termios_spinlock, 0);
   }
 
   tmp = tty->orig_termios;
@@ -360,7 +365,7 @@ uv_handle_type uv_guess_handle(uv_file file) {
   if (isatty(file))
     return UV_TTY;
 
-  if (fstat(file, &s)) {
+  if (uv__fstat(file, &s)) {
 #if defined(__PASE__)
     /* On ibmi receiving RST from TCP instead of FIN immediately puts fd into
      * an error state. fstat will return EINVAL, getsockname will also return
@@ -445,14 +450,15 @@ int uv_tty_reset_mode(void) {
   int err;
 
   saved_errno = errno;
-  if (!uv_spinlock_trylock(&termios_spinlock))
+
+  if (atomic_exchange(&termios_spinlock, 1))
     return UV_EBUSY;  /* In uv_tty_set_mode(). */
 
   err = 0;
   if (orig_termios_fd != -1)
     err = uv__tcsetattr(orig_termios_fd, TCSANOW, &orig_termios);
 
-  uv_spinlock_unlock(&termios_spinlock);
+  atomic_store(&termios_spinlock, 0);
   errno = saved_errno;
 
   return err;

deps/libuv/src/unix/udp.c

@@ -40,12 +40,6 @@
 # define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
 #endif
 
-union uv__sockaddr {
-  struct sockaddr_in6 in6;
-  struct sockaddr_in in;
-  struct sockaddr addr;
-};
-
 static void uv__udp_run_completed(uv_udp_t* handle);
 static void uv__udp_io(uv_loop_t* loop, uv__io_t* w, unsigned int revents);
 static void uv__udp_recvmsg(uv_udp_t* handle);
@@ -54,36 +48,6 @@ static int uv__udp_maybe_deferred_bind(uv_udp_t* handle,
                                        int domain,
                                        unsigned int flags);
 
-#if HAVE_MMSG
-
-#define UV__MMSG_MAXWIDTH 20
-
-static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t* buf);
-static void uv__udp_sendmmsg(uv_udp_t* handle);
-
-static int uv__recvmmsg_avail;
-static int uv__sendmmsg_avail;
-static uv_once_t once = UV_ONCE_INIT;
-
-static void uv__udp_mmsg_init(void) {
-  int ret;
-  int s;
-  s = uv__socket(AF_INET, SOCK_DGRAM, 0);
-  if (s < 0)
-    return;
-  ret = uv__sendmmsg(s, NULL, 0);
-  if (ret == 0 || errno != ENOSYS) {
-    uv__sendmmsg_avail = 1;
-    uv__recvmmsg_avail = 1;
-  } else {
-    ret = uv__recvmmsg(s, NULL, 0);
-    if (ret == 0 || errno != ENOSYS)
-      uv__recvmmsg_avail = 1;
-  }
-  uv__close(s);
-}
-
-#endif
 
 void uv__udp_close(uv_udp_t* handle) {
   uv__io_close(handle->loop, &handle->io_watcher);
@@ -183,11 +147,11 @@ static void uv__udp_io(uv_loop_t* loop, uv__io_t* w, unsigned int revents) {
   }
 }
 
-#if HAVE_MMSG
 static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t* buf) {
-  struct sockaddr_in6 peers[UV__MMSG_MAXWIDTH];
-  struct iovec iov[UV__MMSG_MAXWIDTH];
-  struct uv__mmsghdr msgs[UV__MMSG_MAXWIDTH];
+#if defined(__linux__) || defined(__FreeBSD__)
+  struct sockaddr_in6 peers[20];
+  struct iovec iov[ARRAY_SIZE(peers)];
+  struct mmsghdr msgs[ARRAY_SIZE(peers)];
   ssize_t nread;
   uv_buf_t chunk_buf;
   size_t chunks;
@@ -212,7 +176,7 @@ static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t* buf) {
   }
 
   do
-    nread = uv__recvmmsg(handle->io_watcher.fd, msgs, chunks);
+    nread = recvmmsg(handle->io_watcher.fd, msgs, chunks, 0, NULL);
   while (nread == -1 && errno == EINTR);
 
   if (nread < 1) {
@@ -240,8 +204,10 @@ static int uv__udp_recvmmsg(uv_udp_t* handle, uv_buf_t* buf) {
       handle->recv_cb(handle, 0, buf, NULL, UV_UDP_MMSG_FREE);
   }
   return nread;
+#else  /* __linux__ || ____FreeBSD__ */
+  return UV_ENOSYS;
+#endif  /* __linux__ || ____FreeBSD__ */
 }
-#endif
 
 static void uv__udp_recvmsg(uv_udp_t* handle) {
   struct sockaddr_storage peer;
@@ -268,14 +234,12 @@ static void uv__udp_recvmsg(uv_udp_t* handle) {
     }
     assert(buf.base != NULL);
 
-#if HAVE_MMSG
     if (uv_udp_using_recvmmsg(handle)) {
       nread = uv__udp_recvmmsg(handle, &buf);
       if (nread > 0)
         count -= nread;
       continue;
     }
-#endif
 
     memset(&h, 0, sizeof(h));
     memset(&peer, 0, sizeof(peer));
@@ -311,11 +275,11 @@ static void uv__udp_recvmsg(uv_udp_t* handle) {
       && handle->recv_cb != NULL);
 }
 
-#if HAVE_MMSG
-static void uv__udp_sendmmsg(uv_udp_t* handle) {
+static void uv__udp_sendmsg(uv_udp_t* handle) {
+#if defined(__linux__) || defined(__FreeBSD__)
   uv_udp_send_t* req;
-  struct uv__mmsghdr h[UV__MMSG_MAXWIDTH];
-  struct uv__mmsghdr *p;
+  struct mmsghdr h[20];
+  struct mmsghdr* p;
   QUEUE* q;
   ssize_t npkts;
   size_t pkts;
@@ -326,7 +290,7 @@ static void uv__udp_sendmmsg(uv_udp_t* handle) {
 
 write_queue_drain:
   for (pkts = 0, q = QUEUE_HEAD(&handle->write_queue);
-       pkts < UV__MMSG_MAXWIDTH && q != &handle->write_queue;
+       pkts < ARRAY_SIZE(h) && q != &handle->write_queue;
        ++pkts, q = QUEUE_HEAD(q)) {
     assert(q != NULL);
     req = QUEUE_DATA(q, uv_udp_send_t, queue);
@@ -355,7 +319,7 @@ write_queue_drain:
   }
 
   do
-    npkts = uv__sendmmsg(handle->io_watcher.fd, h, pkts);
+    npkts = sendmmsg(handle->io_watcher.fd, h, pkts, 0);
   while (npkts == -1 && errno == EINTR);
 
   if (npkts < 1) {
@@ -401,24 +365,12 @@ write_queue_drain:
   if (!QUEUE_EMPTY(&handle->write_queue))
     goto write_queue_drain;
   uv__io_feed(handle->loop, &handle->io_watcher);
-  return;
-}
-#endif
-
-static void uv__udp_sendmsg(uv_udp_t* handle) {
+#else  /* __linux__ || ____FreeBSD__ */
   uv_udp_send_t* req;
   struct msghdr h;
   QUEUE* q;
   ssize_t size;
 
-#if HAVE_MMSG
-  uv_once(&once, uv__udp_mmsg_init);
-  if (uv__sendmmsg_avail) {
-    uv__udp_sendmmsg(handle);
-    return;
-  }
-#endif
-
   while (!QUEUE_EMPTY(&handle->write_queue)) {
     q = QUEUE_HEAD(&handle->write_queue);
     assert(q != NULL);
@@ -466,6 +418,7 @@ static void uv__udp_sendmsg(uv_udp_t* handle) {
     QUEUE_INSERT_TAIL(&handle->write_completed_queue, &req->queue);
     uv__io_feed(handle->loop, &handle->io_watcher);
   }
+#endif  /* __linux__ || ____FreeBSD__ */
 }
 
 /* On the BSDs, SO_REUSEPORT implies SO_REUSEADDR but with some additional
@@ -495,7 +448,8 @@ static int uv__set_reuse(int fd) {
     if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)))
        return UV__ERR(errno);
   }
-#elif defined(SO_REUSEPORT) && !defined(__linux__) && !defined(__GNU__)
+#elif defined(SO_REUSEPORT) && !defined(__linux__) && !defined(__GNU__) && \
+	!defined(__sun__)
   if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)))
     return UV__ERR(errno);
 #else
@@ -1061,11 +1015,9 @@ int uv__udp_init_ex(uv_loop_t* loop,
 
 
 int uv_udp_using_recvmmsg(const uv_udp_t* handle) {
-#if HAVE_MMSG
-  if (handle->flags & UV_HANDLE_UDP_RECVMMSG) {
-    uv_once(&once, uv__udp_mmsg_init);
-    return uv__recvmmsg_avail;
-  }
+#if defined(__linux__) || defined(__FreeBSD__)
+  if (handle->flags & UV_HANDLE_UDP_RECVMMSG)
+    return 1;
 #endif
   return 0;
 }

deps/libuv/src/uv-common.c

@@ -128,6 +128,39 @@ int uv_replace_allocator(uv_malloc_func malloc_func,
   return 0;
 }
 
+
+void uv_os_free_passwd(uv_passwd_t* pwd) {
+  if (pwd == NULL)
+    return;
+
+  /* On unix, the memory for name, shell, and homedir are allocated in a single
+   * uv__malloc() call. The base of the pointer is stored in pwd->username, so
+   * that is the field that needs to be freed.
+   */
+  uv__free(pwd->username);
+#ifdef _WIN32
+  uv__free(pwd->homedir);
+#endif
+  pwd->username = NULL;
+  pwd->shell = NULL;
+  pwd->homedir = NULL;
+}
+
+
+void uv_os_free_group(uv_group_t *grp) {
+  if (grp == NULL)
+    return;
+
+  /* The memory for is allocated in a single uv__malloc() call. The base of the
+   * pointer is stored in grp->members, so that is the only field that needs to
+   * be freed.
+   */
+  uv__free(grp->members);
+  grp->members = NULL;
+  grp->groupname = NULL;
+}
+
+
 #define XX(uc, lc) case UV_##uc: return sizeof(uv_##lc##_t);
 
 size_t uv_handle_size(uv_handle_type type) {
@@ -650,14 +683,22 @@ static unsigned int* uv__get_nbufs(uv_fs_t* req) {
 
 void uv__fs_scandir_cleanup(uv_fs_t* req) {
   uv__dirent_t** dents;
+  unsigned int* nbufs;
+  unsigned int i;
+  unsigned int n;
 
-  unsigned int* nbufs = uv__get_nbufs(req);
+  if (req->result >= 0) {
+    dents = req->ptr;
+    nbufs = uv__get_nbufs(req);
 
-  dents = req->ptr;
-  if (*nbufs > 0 && *nbufs != (unsigned int) req->result)
-    (*nbufs)--;
-  for (; *nbufs < (unsigned int) req->result; (*nbufs)++)
-    uv__fs_scandir_free(dents[*nbufs]);
+    i = 0;
+    if (*nbufs > 0)
+      i = *nbufs - 1;
+
+    n = (unsigned int) req->result;
+    for (; i < n; i++)
+      uv__fs_scandir_free(dents[i]);
+  }
 
   uv__fs_scandir_free(req->ptr);
   req->ptr = NULL;
@@ -879,12 +920,17 @@ void uv_os_free_environ(uv_env_item_t* envitems, int count) {
 
 
 void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count) {
+#ifdef __linux__
+  (void) &count;
+  uv__free(cpu_infos);
+#else
   int i;
 
   for (i = 0; i < count; i++)
     uv__free(cpu_infos[i].model);
 
   uv__free(cpu_infos);
+#endif  /* __linux__ */
 }
 
 
@@ -898,7 +944,7 @@ __attribute__((destructor))
 void uv_library_shutdown(void) {
   static int was_shutdown;
 
-  if (uv__load_relaxed(&was_shutdown))
+  if (uv__exchange_int_relaxed(&was_shutdown, 1))
     return;
 
   uv__process_title_cleanup();
@@ -909,7 +955,6 @@ void uv_library_shutdown(void) {
 #else
   uv__threadpool_cleanup();
 #endif
-  uv__store_relaxed(&was_shutdown, 1);
 }
 
 
@@ -955,6 +1000,15 @@ void uv__metrics_set_provider_entry_time(uv_loop_t* loop) {
 }
 
 
+int uv_metrics_info(uv_loop_t* loop, uv_metrics_t* metrics) {
+  memcpy(metrics,
+         &uv__get_loop_metrics(loop)->metrics,
+         sizeof(*metrics));
+
+  return 0;
+}
+
+
 uint64_t uv_metrics_idle_time(uv_loop_t* loop) {
   uv__loop_metrics_t* loop_metrics;
   uint64_t entry_time;

deps/libuv/src/uv-common.h

@@ -30,18 +30,17 @@
 #include <assert.h>
 #include <stdarg.h>
 #include <stddef.h>
-
-#if defined(_MSC_VER) && _MSC_VER < 1600
-# include "uv/stdint-msvc2008.h"
-#else
-# include <stdint.h>
-#endif
+#include <stdint.h>
 
 #include "uv.h"
 #include "uv/tree.h"
 #include "queue.h"
 #include "strscpy.h"
 
+#ifndef _MSC_VER
+# include <stdatomic.h>
+#endif
+
 #if EDOM > 0
 # define UV__ERR(x) (-(x))
 #else
@@ -53,19 +52,25 @@ extern int snprintf(char*, size_t, const char*, ...);
 #endif
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#define ARRAY_END(a)  ((a) + ARRAY_SIZE(a))
 
 #define container_of(ptr, type, member) \
   ((type *) ((char *) (ptr) - offsetof(type, member)))
 
+/* C11 defines static_assert to be a macro which calls _Static_assert. */
+#if defined(static_assert)
+#define STATIC_ASSERT(expr) static_assert(expr, #expr)
+#else
 #define STATIC_ASSERT(expr)                                                   \
   void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)])
+#endif
 
-#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 7)
-#define uv__load_relaxed(p) __atomic_load_n(p, __ATOMIC_RELAXED)
-#define uv__store_relaxed(p, v) __atomic_store_n(p, v, __ATOMIC_RELAXED)
+#ifdef _MSC_VER
+#define uv__exchange_int_relaxed(p, v)                                        \
+  InterlockedExchangeNoFence((LONG volatile*)(p), v)
 #else
-#define uv__load_relaxed(p) (*p)
-#define uv__store_relaxed(p, v) do *p = v; while (0)
+#define uv__exchange_int_relaxed(p, v)                                        \
+  atomic_exchange_explicit((_Atomic int*)(p), v, memory_order_relaxed)
 #endif
 
 #define UV__UDP_DGRAM_MAXSIZE (64 * 1024)
@@ -83,7 +88,6 @@ enum {
   /* Used by streams. */
   UV_HANDLE_LISTENING                   = 0x00000040,
   UV_HANDLE_CONNECTION                  = 0x00000080,
-  UV_HANDLE_SHUTTING                    = 0x00000100,
   UV_HANDLE_SHUT                        = 0x00000200,
   UV_HANDLE_READ_PARTIAL                = 0x00000400,
   UV_HANDLE_READ_EOF                    = 0x00000800,
@@ -263,6 +267,14 @@ void uv__threadpool_cleanup(void);
 #define uv__is_closing(h)                                                     \
   (((h)->flags & (UV_HANDLE_CLOSING | UV_HANDLE_CLOSED)) != 0)
 
+#if defined(_WIN32)
+# define uv__is_stream_shutting(h)                                            \
+  (h->stream.conn.shutdown_req != NULL)
+#else
+# define uv__is_stream_shutting(h)                                            \
+  (h->shutdown_req != NULL)
+#endif
+
 #define uv__handle_start(h)                                                   \
   do {                                                                        \
     if (((h)->flags & UV_HANDLE_ACTIVE) != 0) break;                          \
@@ -347,6 +359,21 @@ void uv__threadpool_cleanup(void);
 #define uv__get_loop_metrics(loop)                                            \
   (&uv__get_internal_fields(loop)->loop_metrics)
 
+#define uv__metrics_inc_loop_count(loop)                                      \
+  do {                                                                        \
+    uv__get_loop_metrics(loop)->metrics.loop_count++;                         \
+  } while (0)
+
+#define uv__metrics_inc_events(loop, e)                                       \
+  do {                                                                        \
+    uv__get_loop_metrics(loop)->metrics.events += (e);                        \
+  } while (0)
+
+#define uv__metrics_inc_events_waiting(loop, e)                               \
+  do {                                                                        \
+    uv__get_loop_metrics(loop)->metrics.events_waiting += (e);                \
+  } while (0)
+
 /* Allocator prototypes */
 void *uv__calloc(size_t count, size_t size);
 char *uv__strdup(const char* s);
@@ -360,6 +387,7 @@ typedef struct uv__loop_metrics_s uv__loop_metrics_t;
 typedef struct uv__loop_internal_fields_s uv__loop_internal_fields_t;
 
 struct uv__loop_metrics_s {
+  uv_metrics_t metrics;
   uint64_t provider_entry_time;
   uint64_t provider_idle_time;
   uv_mutex_t lock;
@@ -368,9 +396,37 @@ struct uv__loop_metrics_s {
 void uv__metrics_update_idle_time(uv_loop_t* loop);
 void uv__metrics_set_provider_entry_time(uv_loop_t* loop);
 
+#ifdef __linux__
+struct uv__iou {
+  uint32_t* sqhead;
+  uint32_t* sqtail;
+  uint32_t* sqarray;
+  uint32_t sqmask;
+  uint32_t* sqflags;
+  uint32_t* cqhead;
+  uint32_t* cqtail;
+  uint32_t cqmask;
+  void* sq;   /* pointer to munmap() on event loop teardown */
+  void* cqe;  /* pointer to array of struct uv__io_uring_cqe */
+  void* sqe;  /* pointer to array of struct uv__io_uring_sqe */
+  size_t sqlen;
+  size_t cqlen;
+  size_t maxlen;
+  size_t sqelen;
+  int ringfd;
+  uint32_t in_flight;
+};
+#endif  /* __linux__ */
+
 struct uv__loop_internal_fields_s {
   unsigned int flags;
   uv__loop_metrics_t loop_metrics;
+  int current_timeout;
+#ifdef __linux__
+  struct uv__iou ctl;
+  struct uv__iou iou;
+  void* inv;  /* used by uv__platform_invalidate_fd() */
+#endif  /* __linux__ */
 };
 
 #endif /* UV_COMMON_H_ */

deps/libuv/src/win/core.c

@@ -245,6 +245,9 @@ int uv_loop_init(uv_loop_t* loop) {
   err = uv_mutex_init(&lfields->loop_metrics.lock);
   if (err)
     goto fail_metrics_mutex_init;
+  memset(&lfields->loop_metrics.metrics,
+         0,
+         sizeof(lfields->loop_metrics.metrics));
 
   /* To prevent uninitialized memory access, loop->time must be initialized
    * to zero before calling uv_update_time for the first time.
@@ -279,9 +282,6 @@ int uv_loop_init(uv_loop_t* loop) {
 
   memset(&loop->poll_peer_sockets, 0, sizeof loop->poll_peer_sockets);
 
-  loop->active_tcp_streams = 0;
-  loop->active_udp_streams = 0;
-
   loop->timer_counter = 0;
   loop->stop_flag = 0;
 
@@ -424,6 +424,7 @@ int uv_backend_timeout(const uv_loop_t* loop) {
 
 
 static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
+  uv__loop_internal_fields_t* lfields;
   DWORD bytes;
   ULONG_PTR key;
   OVERLAPPED* overlapped;
@@ -433,9 +434,10 @@ static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
   uint64_t user_timeout;
   int reset_timeout;
 
+  lfields = uv__get_internal_fields(loop);
   timeout_time = loop->time + timeout;
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -450,6 +452,12 @@ static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
     if (timeout != 0)
       uv__metrics_set_provider_entry_time(loop);
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     GetQueuedCompletionStatus(loop->iocp,
                               &bytes,
                               &key,
@@ -457,6 +465,8 @@ static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
                               timeout);
 
     if (reset_timeout != 0) {
+      if (overlapped && timeout == 0)
+        uv__metrics_inc_events_waiting(loop, 1);
       timeout = user_timeout;
       reset_timeout = 0;
     }
@@ -469,6 +479,8 @@ static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
     uv__metrics_update_idle_time(loop);
 
     if (overlapped) {
+      uv__metrics_inc_events(loop, 1);
+
       /* Package was dequeued */
       req = uv__overlapped_to_req(overlapped);
       uv__insert_pending_req(loop, req);
@@ -503,6 +515,7 @@ static void uv__poll_wine(uv_loop_t* loop, DWORD timeout) {
 
 
 static void uv__poll(uv_loop_t* loop, DWORD timeout) {
+  uv__loop_internal_fields_t* lfields;
   BOOL success;
   uv_req_t* req;
   OVERLAPPED_ENTRY overlappeds[128];
@@ -511,11 +524,13 @@ static void uv__poll(uv_loop_t* loop, DWORD timeout) {
   int repeat;
   uint64_t timeout_time;
   uint64_t user_timeout;
+  uint64_t actual_timeout;
   int reset_timeout;
 
+  lfields = uv__get_internal_fields(loop);
   timeout_time = loop->time + timeout;
 
-  if (uv__get_internal_fields(loop)->flags & UV_METRICS_IDLE_TIME) {
+  if (lfields->flags & UV_METRICS_IDLE_TIME) {
     reset_timeout = 1;
     user_timeout = timeout;
     timeout = 0;
@@ -524,12 +539,20 @@ static void uv__poll(uv_loop_t* loop, DWORD timeout) {
   }
 
   for (repeat = 0; ; repeat++) {
+    actual_timeout = timeout;
+
     /* Only need to set the provider_entry_time if timeout != 0. The function
      * will return early if the loop isn't configured with UV_METRICS_IDLE_TIME.
      */
     if (timeout != 0)
       uv__metrics_set_provider_entry_time(loop);
 
+    /* Store the current timeout in a location that's globally accessible so
+     * other locations like uv__work_done() can determine whether the queue
+     * of events in the callback were waiting when poll was called.
+     */
+    lfields->current_timeout = timeout;
+
     success = pGetQueuedCompletionStatusEx(loop->iocp,
                                            overlappeds,
                                            ARRAY_SIZE(overlappeds),
@@ -543,9 +566,9 @@ static void uv__poll(uv_loop_t* loop, DWORD timeout) {
     }
 
     /* Placed here because on success the loop will break whether there is an
-     * empty package or not, or if GetQueuedCompletionStatus returned early then
-     * the timeout will be updated and the loop will run again. In either case
-     * the idle time will need to be updated.
+     * empty package or not, or if pGetQueuedCompletionStatusEx returned early
+     * then the timeout will be updated and the loop will run again. In either
+     * case the idle time will need to be updated.
      */
     uv__metrics_update_idle_time(loop);
 
@@ -555,6 +578,10 @@ static void uv__poll(uv_loop_t* loop, DWORD timeout) {
          * meant only to wake us up.
          */
         if (overlappeds[i].lpOverlapped) {
+          uv__metrics_inc_events(loop, 1);
+          if (actual_timeout == 0)
+            uv__metrics_inc_events_waiting(loop, 1);
+
           req = uv__overlapped_to_req(overlappeds[i].lpOverlapped);
           uv__insert_pending_req(loop, req);
         }
@@ -598,10 +625,17 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
   if (!r)
     uv_update_time(loop);
 
-  while (r != 0 && loop->stop_flag == 0) {
-    uv_update_time(loop);
+  /* Maintain backwards compatibility by processing timers before entering the
+   * while loop for UV_RUN_DEFAULT. Otherwise timers only need to be executed
+   * once, which should be done after polling in order to maintain proper
+   * execution order of the conceptual event loop. */
+  if (mode == UV_RUN_DEFAULT) {
+    if (r)
+      uv_update_time(loop);
     uv__run_timers(loop);
+  }
 
+  while (r != 0 && loop->stop_flag == 0) {
     can_sleep = loop->pending_reqs_tail == NULL && loop->idle_handles == NULL;
 
     uv__process_reqs(loop);
@@ -612,6 +646,8 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
     if ((mode == UV_RUN_ONCE && can_sleep) || mode == UV_RUN_DEFAULT)
       timeout = uv_backend_timeout(loop);
 
+    uv__metrics_inc_loop_count(loop);
+
     if (pGetQueuedCompletionStatusEx)
       uv__poll(loop, timeout);
     else
@@ -632,18 +668,8 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
     uv__check_invoke(loop);
     uv__process_endgames(loop);
 
-    if (mode == UV_RUN_ONCE) {
-      /* UV_RUN_ONCE implies forward progress: at least one callback must have
-       * been invoked when it returns. uv__io_poll() can return without doing
-       * I/O (meaning: no callbacks) when its timeout expires - which means we
-       * have pending timers that satisfy the forward progress constraint.
-       *
-       * UV_RUN_NOWAIT makes no guarantees about progress so it's omitted from
-       * the check.
-       */
-      uv_update_time(loop);
-      uv__run_timers(loop);
-    }
+    uv_update_time(loop);
+    uv__run_timers(loop);
 
     r = uv__loop_alive(loop);
     if (mode == UV_RUN_ONCE || mode == UV_RUN_NOWAIT)

deps/libuv/src/win/fs.c

@@ -36,6 +36,8 @@
 #include "handle-inl.h"
 #include "fs-fd-hash-inl.h"
 
+#include <winioctl.h>
+
 
 #define UV_FS_FREE_PATHS         0x0002
 #define UV_FS_FREE_PTR           0x0008
@@ -1706,11 +1708,36 @@ void fs__closedir(uv_fs_t* req) {
 
 INLINE static int fs__stat_handle(HANDLE handle, uv_stat_t* statbuf,
     int do_lstat) {
+  FILE_FS_DEVICE_INFORMATION device_info;
   FILE_ALL_INFORMATION file_info;
   FILE_FS_VOLUME_INFORMATION volume_info;
   NTSTATUS nt_status;
   IO_STATUS_BLOCK io_status;
 
+  nt_status = pNtQueryVolumeInformationFile(handle,
+                                            &io_status,
+                                            &device_info,
+                                            sizeof device_info,
+                                            FileFsDeviceInformation);
+
+  /* Buffer overflow (a warning status code) is expected here. */
+  if (NT_ERROR(nt_status)) {
+    SetLastError(pRtlNtStatusToDosError(nt_status));
+    return -1;
+  }
+
+  /* If it's NUL device set fields as reasonable as possible and return. */
+  if (device_info.DeviceType == FILE_DEVICE_NULL) {
+    memset(statbuf, 0, sizeof(uv_stat_t));
+    statbuf->st_mode = _S_IFCHR;
+    statbuf->st_mode |= (_S_IREAD | _S_IWRITE) | ((_S_IREAD | _S_IWRITE) >> 3) |
+                        ((_S_IREAD | _S_IWRITE) >> 6);
+    statbuf->st_nlink = 1;
+    statbuf->st_blksize = 4096;    
+    statbuf->st_rdev = FILE_DEVICE_NULL << 16;
+    return 0;
+  }
+
   nt_status = pNtQueryInformationFile(handle,
                                       &io_status,
                                       &file_info,
@@ -1915,6 +1942,37 @@ INLINE static void fs__stat_impl(uv_fs_t* req, int do_lstat) {
 }
 
 
+INLINE static int fs__fstat_handle(int fd, HANDLE handle, uv_stat_t* statbuf) {
+  DWORD file_type;
+
+  /* Each file type is processed differently. */
+  file_type = uv_guess_handle(fd);
+  switch (file_type) {
+  /* Disk files use the existing logic from fs__stat_handle. */
+  case UV_FILE:
+    return fs__stat_handle(handle, statbuf, 0);
+
+  /* Devices and pipes are processed identically. There is no more information
+   * for them from any API. Fields are set as reasonably as possible and the
+   * function returns. */
+  case UV_TTY:
+  case UV_NAMED_PIPE:
+    memset(statbuf, 0, sizeof(uv_stat_t));
+    statbuf->st_mode = file_type == UV_TTY ? _S_IFCHR : _S_IFIFO;
+    statbuf->st_nlink = 1;
+    statbuf->st_rdev = (file_type == UV_TTY ? FILE_DEVICE_CONSOLE : FILE_DEVICE_NAMED_PIPE) << 16;
+    statbuf->st_ino = (uint64_t) handle;
+    return 0;
+
+  /* If file type is unknown it is an error. */
+  case UV_UNKNOWN_HANDLE:
+  default:
+    SetLastError(ERROR_INVALID_HANDLE);
+    return -1;
+  }
+}
+
+
 static void fs__stat(uv_fs_t* req) {
   fs__stat_prepare_path(req->file.pathw);
   fs__stat_impl(req, 0);
@@ -1940,7 +1998,7 @@ static void fs__fstat(uv_fs_t* req) {
     return;
   }
 
-  if (fs__stat_handle(handle, &req->statbuf, 0) != 0) {
+  if (fs__fstat_handle(fd, handle, &req->statbuf) != 0) {
     SET_REQ_WIN32_ERROR(req, GetLastError());
     return;
   }
@@ -2221,7 +2279,7 @@ static void fs__fchmod(uv_fs_t* req) {
         SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(nt_status));
         goto fchmod_cleanup;
       }
-      /* Remeber to clear the flag later on */
+      /* Remember to clear the flag later on */
       clear_archive_flag = 1;
   } else {
       clear_archive_flag = 0;
@@ -2604,7 +2662,10 @@ static void fs__readlink(uv_fs_t* req) {
   }
 
   if (fs__readlink_handle(handle, (char**) &req->ptr, NULL) != 0) {
-    SET_REQ_WIN32_ERROR(req, GetLastError());
+    DWORD error = GetLastError();
+    SET_REQ_WIN32_ERROR(req, error);
+    if (error == ERROR_NOT_A_REPARSE_POINT)
+      req->result = UV_EINVAL;
     CloseHandle(handle);
     return;
   }

deps/libuv/src/win/internal.h

@@ -267,7 +267,6 @@ void uv__util_init(void);
 
 uint64_t uv__hrtime(unsigned int scale);
 __declspec(noreturn) void uv_fatal_error(const int errorno, const char* syscall);
-int uv__getpwuid_r(uv_passwd_t* pwd);
 int uv__convert_utf16_to_utf8(const WCHAR* utf16, int utf16len, char** utf8);
 int uv__convert_utf8_to_utf16(const char* utf8, int utf8len, WCHAR** utf16);
 

deps/libuv/src/win/pipe.c

@@ -792,15 +792,17 @@ static DWORD WINAPI pipe_connect_thread_proc(void* parameter) {
 
   /* We're here because CreateFile on a pipe returned ERROR_PIPE_BUSY. We wait
    * up to 30 seconds for the pipe to become available with WaitNamedPipe. */
-  while (WaitNamedPipeW(handle->name, 30000)) {
+  while (WaitNamedPipeW(req->u.connect.name, 30000)) {
     /* The pipe is now available, try to connect. */
-    pipeHandle = open_named_pipe(handle->name, &duplex_flags);
+    pipeHandle = open_named_pipe(req->u.connect.name, &duplex_flags);
     if (pipeHandle != INVALID_HANDLE_VALUE)
       break;
 
     SwitchToThread();
   }
 
+  uv__free(req->u.connect.name);
+  req->u.connect.name = NULL;
   if (pipeHandle != INVALID_HANDLE_VALUE) {
     SET_REQ_SUCCESS(req);
     req->u.connect.pipeHandle = pipeHandle;
@@ -828,6 +830,7 @@ void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle,
   req->cb = cb;
   req->u.connect.pipeHandle = INVALID_HANDLE_VALUE;
   req->u.connect.duplex_flags = 0;
+  req->u.connect.name = NULL;
 
   if (handle->flags & UV_HANDLE_PIPESERVER) {
     err = ERROR_INVALID_PARAMETER;
@@ -859,10 +862,19 @@ void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle,
   pipeHandle = open_named_pipe(handle->name, &duplex_flags);
   if (pipeHandle == INVALID_HANDLE_VALUE) {
     if (GetLastError() == ERROR_PIPE_BUSY) {
+      req->u.connect.name = uv__malloc(nameSize);
+      if (!req->u.connect.name) {
+        uv_fatal_error(ERROR_OUTOFMEMORY, "uv__malloc");
+      }
+
+      memcpy(req->u.connect.name, handle->name, nameSize);
+
       /* Wait for the server to make a pipe instance available. */
       if (!QueueUserWorkItem(&pipe_connect_thread_proc,
                              req,
                              WT_EXECUTELONGFUNCTION)) {
+        uv__free(req->u.connect.name);
+        req->u.connect.name = NULL;
         err = GetLastError();
         goto error;
       }
@@ -1067,11 +1079,12 @@ int uv__pipe_accept(uv_pipe_t* server, uv_stream_t* client) {
 
     err = uv__tcp_xfer_import(
         (uv_tcp_t*) client, item->xfer_type, &item->xfer_info);
+    
+    uv__free(item);
+    
     if (err != 0)
       return err;
 
-    uv__free(item);
-
   } else {
     pipe_client = (uv_pipe_t*) client;
     uv__pipe_connection_init(pipe_client);
@@ -1638,9 +1651,13 @@ static DWORD uv__pipe_get_ipc_remote_pid(uv_pipe_t* handle) {
   /* If the both ends of the IPC pipe are owned by the same process,
    * the remote end pid may not yet be set. If so, do it here.
    * TODO: this is weird; it'd probably better to use a handshake. */
-  if (*pid == 0)
-    *pid = GetCurrentProcessId();
-
+  if (*pid == 0) {
+    GetNamedPipeClientProcessId(handle->handle, pid);
+    if (*pid == GetCurrentProcessId()) {
+      GetNamedPipeServerProcessId(handle->handle, pid);
+    }
+  }
+  
   return *pid;
 }
 
@@ -2069,9 +2086,9 @@ void uv__process_pipe_write_req(uv_loop_t* loop, uv_pipe_t* handle,
     uv__queue_non_overlapped_write(handle);
   }
 
-  if (handle->stream.conn.write_reqs_pending == 0)
-    if (handle->flags & UV_HANDLE_SHUTTING)
-      uv__pipe_shutdown(loop, handle, handle->stream.conn.shutdown_req);
+  if (handle->stream.conn.write_reqs_pending == 0 &&
+      uv__is_stream_shutting(handle))
+    uv__pipe_shutdown(loop, handle, handle->stream.conn.shutdown_req);
 
   DECREASE_PENDING_REQ_COUNT(handle);
 }
@@ -2126,7 +2143,10 @@ void uv__process_pipe_connect_req(uv_loop_t* loop, uv_pipe_t* handle,
   if (REQ_SUCCESS(req)) {
     pipeHandle = req->u.connect.pipeHandle;
     duplex_flags = req->u.connect.duplex_flags;
-    err = uv__set_pipe_handle(loop, handle, pipeHandle, -1, duplex_flags);
+    if (handle->flags & UV_HANDLE_CLOSING)
+      err = UV_ECANCELED;
+    else
+      err = uv__set_pipe_handle(loop, handle, pipeHandle, -1, duplex_flags);
     if (err)
       CloseHandle(pipeHandle);
   } else {
@@ -2149,7 +2169,6 @@ void uv__process_pipe_shutdown_req(uv_loop_t* loop, uv_pipe_t* handle,
 
   /* Clear the shutdown_req field so we don't go here again. */
   handle->stream.conn.shutdown_req = NULL;
-  handle->flags &= ~UV_HANDLE_SHUTTING;
   UNREGISTER_HANDLE_REQ(loop, handle, req);
 
   if (handle->flags & UV_HANDLE_CLOSING) {
@@ -2342,7 +2361,10 @@ int uv_pipe_open(uv_pipe_t* pipe, uv_file file) {
 
   if (pipe->ipc) {
     assert(!(pipe->flags & UV_HANDLE_NON_OVERLAPPED_PIPE));
-    pipe->pipe.conn.ipc_remote_pid = uv_os_getppid();
+    GetNamedPipeClientProcessId(os_handle, &pipe->pipe.conn.ipc_remote_pid);
+    if (pipe->pipe.conn.ipc_remote_pid == GetCurrentProcessId()) {
+      GetNamedPipeServerProcessId(os_handle, &pipe->pipe.conn.ipc_remote_pid);
+    }
     assert(pipe->pipe.conn.ipc_remote_pid != (DWORD)(uv_pid_t) -1);
   }
   return 0;

deps/libuv/src/win/poll.c

@@ -425,9 +425,8 @@ int uv_poll_init_socket(uv_loop_t* loop, uv_poll_t* handle,
     return uv_translate_sys_error(WSAGetLastError());
 
 /* Try to obtain a base handle for the socket. This increases this chances that
- * we find an AFD handle and are able to use the fast poll mechanism. This will
- * always fail on windows XP/2k3, since they don't support the. SIO_BASE_HANDLE
- * ioctl. */
+ * we find an AFD handle and are able to use the fast poll mechanism.
+ */
 #ifndef NDEBUG
   base_socket = INVALID_SOCKET;
 #endif

deps/libuv/src/win/process.c

@@ -32,6 +32,9 @@
 #include "internal.h"
 #include "handle-inl.h"
 #include "req-inl.h"
+#include <dbghelp.h>
+#include <shlobj.h>
+#include <psapi.h>     /* GetModuleBaseNameW */
 
 
 #define SIGKILL         9
@@ -144,7 +147,6 @@ static void uv__process_init(uv_loop_t* loop, uv_process_t* handle) {
   handle->exit_signal = 0;
   handle->wait_handle = INVALID_HANDLE_VALUE;
   handle->process_handle = INVALID_HANDLE_VALUE;
-  handle->child_stdio_buffer = NULL;
   handle->exit_cb_pending = 0;
 
   UV_REQ_INIT(&handle->exit_req, UV_PROCESS_EXIT);
@@ -947,9 +949,11 @@ int uv_spawn(uv_loop_t* loop,
   STARTUPINFOW startup;
   PROCESS_INFORMATION info;
   DWORD process_flags;
+  BYTE* child_stdio_buffer;
 
   uv__process_init(loop, process);
   process->exit_cb = options->exit_cb;
+  child_stdio_buffer = NULL;
 
   if (options->flags & (UV_PROCESS_SETGID | UV_PROCESS_SETUID)) {
     return UV_ENOTSUP;
@@ -1040,7 +1044,7 @@ int uv_spawn(uv_loop_t* loop,
     }
   }
 
-  err = uv__stdio_create(loop, options, &process->child_stdio_buffer);
+  err = uv__stdio_create(loop, options, &child_stdio_buffer);
   if (err)
     goto done;
 
@@ -1059,12 +1063,12 @@ int uv_spawn(uv_loop_t* loop,
   startup.lpTitle = NULL;
   startup.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
 
-  startup.cbReserved2 = uv__stdio_size(process->child_stdio_buffer);
-  startup.lpReserved2 = (BYTE*) process->child_stdio_buffer;
+  startup.cbReserved2 = uv__stdio_size(child_stdio_buffer);
+  startup.lpReserved2 = (BYTE*) child_stdio_buffer;
 
-  startup.hStdInput = uv__stdio_handle(process->child_stdio_buffer, 0);
-  startup.hStdOutput = uv__stdio_handle(process->child_stdio_buffer, 1);
-  startup.hStdError = uv__stdio_handle(process->child_stdio_buffer, 2);
+  startup.hStdInput = uv__stdio_handle(child_stdio_buffer, 0);
+  startup.hStdOutput = uv__stdio_handle(child_stdio_buffer, 1);
+  startup.hStdError = uv__stdio_handle(child_stdio_buffer, 2);
 
   process_flags = CREATE_UNICODE_ENVIRONMENT;
 
@@ -1178,10 +1182,10 @@ int uv_spawn(uv_loop_t* loop,
   uv__free(env);
   uv__free(alloc_path);
 
-  if (process->child_stdio_buffer != NULL) {
+  if (child_stdio_buffer != NULL) {
     /* Clean up child stdio handles. */
-    uv__stdio_destroy(process->child_stdio_buffer);
-    process->child_stdio_buffer = NULL;
+    uv__stdio_destroy(child_stdio_buffer);
+    child_stdio_buffer = NULL;
   }
 
   return uv_translate_sys_error(err);
@@ -1193,7 +1197,120 @@ static int uv__kill(HANDLE process_handle, int signum) {
     return UV_EINVAL;
   }
 
+  /* Create a dump file for the targeted process, if the registry key
+   * `HKLM:Software\Microsoft\Windows\Windows Error Reporting\LocalDumps`
+   * exists.  The location of the dumps can be influenced by the `DumpFolder`
+   * sub-key, which has a default value of `%LOCALAPPDATA%\CrashDumps`, see [0]
+   * for more detail.  Note that if the dump folder does not exist, we attempt
+   * to create it, to match behavior with WER itself.
+   * [0]: https://learn.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps */
+  if (signum == SIGQUIT) {
+    HKEY registry_key;
+    DWORD pid, ret;
+    WCHAR basename[MAX_PATH];
+
+    /* Get target process name. */
+    GetModuleBaseNameW(process_handle, NULL, &basename[0], sizeof(basename));
+
+    /* Get PID of target process. */
+    pid = GetProcessId(process_handle);
+
+    /* Get LocalDumps directory path. */
+    ret = RegOpenKeyExW(
+        HKEY_LOCAL_MACHINE,
+        L"SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\LocalDumps",
+        0,
+        KEY_QUERY_VALUE,
+        &registry_key);
+    if (ret == ERROR_SUCCESS) {
+      HANDLE hDumpFile = NULL;
+      WCHAR dump_folder[MAX_PATH], dump_name[MAX_PATH];
+      DWORD dump_folder_len = sizeof(dump_folder), key_type = 0;
+      ret = RegGetValueW(registry_key,
+                         NULL,
+                         L"DumpFolder",
+                         RRF_RT_ANY,
+                         &key_type,
+                         (PVOID) dump_folder,
+                         &dump_folder_len);
+      if (ret != ERROR_SUCCESS) {
+        /* Default value for `dump_folder` is `%LOCALAPPDATA%\CrashDumps`. */
+        WCHAR* localappdata;
+        SHGetKnownFolderPath(&FOLDERID_LocalAppData, 0, NULL, &localappdata);
+        _snwprintf_s(dump_folder,
+                     sizeof(dump_folder),
+                     _TRUNCATE,
+                     L"%ls\\CrashDumps",
+                     localappdata);
+        CoTaskMemFree(localappdata);
+      }
+      RegCloseKey(registry_key);
+
+      /* Create dump folder if it doesn't already exist. */
+      CreateDirectoryW(dump_folder, NULL);
+
+      /* Construct dump filename from process name and PID. */
+      _snwprintf_s(dump_name,
+                   sizeof(dump_name),
+                   _TRUNCATE,
+                   L"%ls\\%ls.%d.dmp",
+                   dump_folder,
+                   basename,
+                   pid);
+
+      hDumpFile = CreateFileW(dump_name,
+                              GENERIC_WRITE,
+                              0,
+                              NULL,
+                              CREATE_NEW,
+                              FILE_ATTRIBUTE_NORMAL,
+                              NULL);
+      if (hDumpFile != INVALID_HANDLE_VALUE) {
+        DWORD dump_options, sym_options;
+        FILE_DISPOSITION_INFO DeleteOnClose = { TRUE };
+
+        /* If something goes wrong while writing it out, delete the file. */
+        SetFileInformationByHandle(hDumpFile,
+                                   FileDispositionInfo,
+                                   &DeleteOnClose,
+                                   sizeof(DeleteOnClose));
+
+        /* Tell wine to dump ELF modules as well. */
+        sym_options = SymGetOptions();
+        SymSetOptions(sym_options | 0x40000000);
+
+/* MiniDumpWithAvxXStateContext might be undef in server2012r2 or mingw < 12 */
+#ifndef MiniDumpWithAvxXStateContext
+#define MiniDumpWithAvxXStateContext 0x00200000
+#endif
+        /* We default to a fairly complete dump.  In the future, we may want to
+         * allow clients to customize what kind of dump to create. */
+        dump_options = MiniDumpWithFullMemory |
+                       MiniDumpIgnoreInaccessibleMemory |
+                       MiniDumpWithAvxXStateContext;
+
+        if (MiniDumpWriteDump(process_handle,
+                              pid,
+                              hDumpFile,
+                              dump_options,
+                              NULL,
+                              NULL,
+                              NULL)) {
+          /* Don't delete the file on close if we successfully wrote it out. */
+          FILE_DISPOSITION_INFO DontDeleteOnClose = { FALSE };
+          SetFileInformationByHandle(hDumpFile,
+                                     FileDispositionInfo,
+                                     &DontDeleteOnClose,
+                                     sizeof(DontDeleteOnClose));
+        }
+        SymSetOptions(sym_options);
+        CloseHandle(hDumpFile);
+      }
+    }
+  }
+
   switch (signum) {
+    case SIGQUIT:
     case SIGTERM:
     case SIGKILL:
     case SIGINT: {

deps/libuv/src/win/stream.c

@@ -204,7 +204,7 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, uv_shutdown_cb cb) {
   uv_loop_t* loop = handle->loop;
 
   if (!(handle->flags & UV_HANDLE_WRITABLE) ||
-      handle->flags & UV_HANDLE_SHUTTING ||
+      uv__is_stream_shutting(handle) ||
       uv__is_closing(handle)) {
     return UV_ENOTCONN;
   }
@@ -214,7 +214,6 @@ int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, uv_shutdown_cb cb) {
   req->cb = cb;
 
   handle->flags &= ~UV_HANDLE_WRITABLE;
-  handle->flags |= UV_HANDLE_SHUTTING;
   handle->stream.conn.shutdown_req = req;
   handle->reqs_pending++;
   REGISTER_HANDLE_REQ(loop, handle, req);

deps/libuv/src/win/tcp.c

@@ -29,14 +29,6 @@
 #include "req-inl.h"
 
 
-/*
- * Threshold of active tcp streams for which to preallocate tcp read buffers.
- * (Due to node slab allocator performing poorly under this pattern,
- *  the optimization is temporarily disabled (threshold=0).  This will be
- *  revisited once node allocator is improved.)
- */
-const unsigned int uv_active_tcp_streams_threshold = 0;
-
 /*
  * Number of simultaneous pending AcceptEx calls.
  */
@@ -214,7 +206,6 @@ void uv__process_tcp_shutdown_req(uv_loop_t* loop, uv_tcp_t* stream, uv_shutdown
   assert(stream->flags & UV_HANDLE_CONNECTION);
 
   stream->stream.conn.shutdown_req = NULL;
-  stream->flags &= ~UV_HANDLE_SHUTTING;
   UNREGISTER_HANDLE_REQ(loop, stream, req);
 
   err = 0;
@@ -274,7 +265,6 @@ void uv__tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle) {
   }
 
   uv__handle_close(handle);
-  loop->active_tcp_streams--;
 }
 
 
@@ -484,26 +474,9 @@ static void uv__tcp_queue_read(uv_loop_t* loop, uv_tcp_t* handle) {
   req = &handle->read_req;
   memset(&req->u.io.overlapped, 0, sizeof(req->u.io.overlapped));
 
-  /*
-   * Preallocate a read buffer if the number of active streams is below
-   * the threshold.
-  */
-  if (loop->active_tcp_streams < uv_active_tcp_streams_threshold) {
-    handle->flags &= ~UV_HANDLE_ZERO_READ;
-    handle->tcp.conn.read_buffer = uv_buf_init(NULL, 0);
-    handle->alloc_cb((uv_handle_t*) handle, 65536, &handle->tcp.conn.read_buffer);
-    if (handle->tcp.conn.read_buffer.base == NULL ||
-        handle->tcp.conn.read_buffer.len == 0) {
-      handle->read_cb((uv_stream_t*) handle, UV_ENOBUFS, &handle->tcp.conn.read_buffer);
-      return;
-    }
-    assert(handle->tcp.conn.read_buffer.base != NULL);
-    buf = handle->tcp.conn.read_buffer;
-  } else {
-    handle->flags |= UV_HANDLE_ZERO_READ;
-    buf.base = (char*) &uv_zero_;
-    buf.len = 0;
-  }
+  handle->flags |= UV_HANDLE_ZERO_READ;
+  buf.base = (char*) &uv_zero_;
+  buf.len = 0;
 
   /* Prepare the overlapped structure. */
   memset(&(req->u.io.overlapped), 0, sizeof(req->u.io.overlapped));
@@ -550,7 +523,7 @@ int uv_tcp_close_reset(uv_tcp_t* handle, uv_close_cb close_cb) {
   struct linger l = { 1, 0 };
 
   /* Disallow setting SO_LINGER to zero due to some platform inconsistencies */
-  if (handle->flags & UV_HANDLE_SHUTTING)
+  if (uv__is_stream_shutting(handle))
     return UV_EINVAL;
 
   if (0 != setsockopt(handle->socket, SOL_SOCKET, SO_LINGER, (const char*)&l, sizeof(l)))
@@ -654,7 +627,6 @@ int uv__tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb) {
 
 
 int uv__tcp_accept(uv_tcp_t* server, uv_tcp_t* client) {
-  uv_loop_t* loop = server->loop;
   int err = 0;
   int family;
 
@@ -716,8 +688,6 @@ int uv__tcp_accept(uv_tcp_t* server, uv_tcp_t* client) {
     }
   }
 
-  loop->active_tcp_streams++;
-
   return err;
 }
 
@@ -1163,7 +1133,7 @@ void uv__process_tcp_write_req(uv_loop_t* loop, uv_tcp_t* handle,
       closesocket(handle->socket);
       handle->socket = INVALID_SOCKET;
     }
-    if (handle->flags & UV_HANDLE_SHUTTING)
+    if (uv__is_stream_shutting(handle))
       uv__process_tcp_shutdown_req(loop,
                                    handle,
                                    handle->stream.conn.shutdown_req);
@@ -1248,7 +1218,6 @@ void uv__process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
                           0) == 0) {
       uv__connection_init((uv_stream_t*)handle);
       handle->flags |= UV_HANDLE_READABLE | UV_HANDLE_WRITABLE;
-      loop->active_tcp_streams++;
     } else {
       err = WSAGetLastError();
     }
@@ -1331,7 +1300,6 @@ int uv__tcp_xfer_import(uv_tcp_t* tcp,
     tcp->flags |= UV_HANDLE_READABLE | UV_HANDLE_WRITABLE;
   }
 
-  tcp->loop->active_tcp_streams++;
   return 0;
 }
 
@@ -1432,7 +1400,7 @@ static void uv__tcp_try_cancel_reqs(uv_tcp_t* tcp) {
                                                 uv_tcp_non_ifs_lsp_ipv4;
 
   /* If there are non-ifs LSPs then try to obtain a base handle for the socket.
-   * This will always fail on Windows XP/3k. */
+   */
   if (non_ifs_lsp) {
     DWORD bytes;
     if (WSAIoctl(socket,

deps/libuv/src/win/thread.c

@@ -180,6 +180,81 @@ int uv_thread_create_ex(uv_thread_t* tid,
   return UV_EIO;
 }
 
+int uv_thread_setaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          char* oldmask,
+                          size_t mask_size) {
+  int i;
+  HANDLE hproc;
+  DWORD_PTR procmask;
+  DWORD_PTR sysmask;
+  DWORD_PTR threadmask;
+  DWORD_PTR oldthreadmask;
+  int cpumasksize;
+
+  cpumasksize = uv_cpumask_size();
+  assert(cpumasksize > 0);
+  if (mask_size < (size_t)cpumasksize)
+    return UV_EINVAL;
+
+  hproc = GetCurrentProcess();
+  if (!GetProcessAffinityMask(hproc, &procmask, &sysmask))
+    return uv_translate_sys_error(GetLastError());
+
+  threadmask = 0;
+  for (i = 0; i < cpumasksize; i++) {
+    if (cpumask[i]) {
+      if (procmask & (1 << i))
+        threadmask |= 1 << i;
+      else
+        return UV_EINVAL;
+    }
+  }
+
+  oldthreadmask = SetThreadAffinityMask(*tid, threadmask);
+  if (oldthreadmask == 0)
+    return uv_translate_sys_error(GetLastError());
+
+  if (oldmask != NULL) {
+    for (i = 0; i < cpumasksize; i++)
+      oldmask[i] = (oldthreadmask >> i) & 1;
+  }
+
+  return 0;
+}
+
+int uv_thread_getaffinity(uv_thread_t* tid,
+                          char* cpumask,
+                          size_t mask_size) {
+  int i;
+  HANDLE hproc;
+  DWORD_PTR procmask;
+  DWORD_PTR sysmask;
+  DWORD_PTR threadmask;
+  int cpumasksize;
+
+  cpumasksize = uv_cpumask_size();
+  assert(cpumasksize > 0);
+  if (mask_size < (size_t)cpumasksize)
+    return UV_EINVAL;
+
+  hproc = GetCurrentProcess();
+  if (!GetProcessAffinityMask(hproc, &procmask, &sysmask))
+    return uv_translate_sys_error(GetLastError());
+
+  threadmask = SetThreadAffinityMask(*tid, procmask);
+  if (threadmask == 0 || SetThreadAffinityMask(*tid, threadmask) == 0)
+    return uv_translate_sys_error(GetLastError());
+
+  for (i = 0; i < cpumasksize; i++)
+    cpumask[i] = (threadmask >> i) & 1;
+
+  return 0;
+}
+
+int uv_thread_getcpu(void) {
+  return GetCurrentProcessorNumber();
+}
 
 uv_thread_t uv_thread_self(void) {
   uv_thread_t key;
@@ -374,6 +449,7 @@ void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex) {
     abort();
 }
 
+
 int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, uint64_t timeout) {
   if (SleepConditionVariableCS(&cond->cond_var, mutex, (DWORD)(timeout / 1e6)))
     return 0;
@@ -383,69 +459,6 @@ int uv_cond_timedwait(uv_cond_t* cond, uv_mutex_t* mutex, uint64_t timeout) {
 }
 
 
-int uv_barrier_init(uv_barrier_t* barrier, unsigned int count) {
-  int err;
-
-  barrier->n = count;
-  barrier->count = 0;
-
-  err = uv_mutex_init(&barrier->mutex);
-  if (err)
-    return err;
-
-  err = uv_sem_init(&barrier->turnstile1, 0);
-  if (err)
-    goto error2;
-
-  err = uv_sem_init(&barrier->turnstile2, 1);
-  if (err)
-    goto error;
-
-  return 0;
-
-error:
-  uv_sem_destroy(&barrier->turnstile1);
-error2:
-  uv_mutex_destroy(&barrier->mutex);
-  return err;
-
-}
-
-
-void uv_barrier_destroy(uv_barrier_t* barrier) {
-  uv_sem_destroy(&barrier->turnstile2);
-  uv_sem_destroy(&barrier->turnstile1);
-  uv_mutex_destroy(&barrier->mutex);
-}
-
-
-int uv_barrier_wait(uv_barrier_t* barrier) {
-  int serial_thread;
-
-  uv_mutex_lock(&barrier->mutex);
-  if (++barrier->count == barrier->n) {
-    uv_sem_wait(&barrier->turnstile2);
-    uv_sem_post(&barrier->turnstile1);
-  }
-  uv_mutex_unlock(&barrier->mutex);
-
-  uv_sem_wait(&barrier->turnstile1);
-  uv_sem_post(&barrier->turnstile1);
-
-  uv_mutex_lock(&barrier->mutex);
-  serial_thread = (--barrier->count == 0);
-  if (serial_thread) {
-    uv_sem_wait(&barrier->turnstile1);
-    uv_sem_post(&barrier->turnstile2);
-  }
-  uv_mutex_unlock(&barrier->mutex);
-
-  uv_sem_wait(&barrier->turnstile2);
-  uv_sem_post(&barrier->turnstile2);
-  return serial_thread;
-}
-
-
 int uv_key_create(uv_key_t* key) {
   key->tls_index = TlsAlloc();
   if (key->tls_index == TLS_OUT_OF_INDEXES)

deps/libuv/src/win/tty.c

@@ -23,12 +23,7 @@
 #include <io.h>
 #include <string.h>
 #include <stdlib.h>
-
-#if defined(_MSC_VER) && _MSC_VER < 1600
-# include "uv/stdint-msvc2008.h"
-#else
-# include <stdint.h>
-#endif
+#include <stdint.h>
 
 #ifndef COMMON_LVB_REVERSE_VIDEO
 # define COMMON_LVB_REVERSE_VIDEO 0x4000
@@ -175,14 +170,14 @@ void uv__console_init(void) {
                                        0);
   if (uv__tty_console_handle != INVALID_HANDLE_VALUE) {
     CONSOLE_SCREEN_BUFFER_INFO sb_info;
-    QueueUserWorkItem(uv__tty_console_resize_message_loop_thread,
-                      NULL,
-                      WT_EXECUTELONGFUNCTION);
     uv_mutex_init(&uv__tty_console_resize_mutex);
     if (GetConsoleScreenBufferInfo(uv__tty_console_handle, &sb_info)) {
       uv__tty_console_width = sb_info.dwSize.X;
       uv__tty_console_height = sb_info.srWindow.Bottom - sb_info.srWindow.Top + 1;
     }
+    QueueUserWorkItem(uv__tty_console_resize_message_loop_thread,
+                      NULL,
+                      WT_EXECUTELONGFUNCTION);
   }
 }
 
@@ -2239,11 +2234,11 @@ void uv__process_tty_write_req(uv_loop_t* loop, uv_tty_t* handle,
 
 
   handle->stream.conn.write_reqs_pending--;
-  if (handle->stream.conn.write_reqs_pending == 0)
-    if (handle->flags & UV_HANDLE_SHUTTING)
-      uv__process_tty_shutdown_req(loop,
-                                   handle,
-                                   handle->stream.conn.shutdown_req);
+  if (handle->stream.conn.write_reqs_pending == 0 &&
+      uv__is_stream_shutting(handle))
+    uv__process_tty_shutdown_req(loop,
+                                 handle,
+                                 handle->stream.conn.shutdown_req);
 
   DECREASE_PENDING_REQ_COUNT(handle);
 }
@@ -2274,7 +2269,6 @@ void uv__process_tty_shutdown_req(uv_loop_t* loop, uv_tty_t* stream, uv_shutdown
   assert(req);
 
   stream->stream.conn.shutdown_req = NULL;
-  stream->flags &= ~UV_HANDLE_SHUTTING;
   UNREGISTER_HANDLE_REQ(loop, stream, req);
 
   /* TTY shutdown is really just a no-op */
@@ -2429,7 +2423,6 @@ static void uv__tty_console_signal_resize(void) {
   height = sb_info.srWindow.Bottom - sb_info.srWindow.Top + 1;
 
   uv_mutex_lock(&uv__tty_console_resize_mutex);
-  assert(uv__tty_console_width != -1 && uv__tty_console_height != -1);
   if (width != uv__tty_console_width || height != uv__tty_console_height) {
     uv__tty_console_width = width;
     uv__tty_console_height = height;

deps/libuv/src/win/udp.c

@@ -29,11 +29,6 @@
 #include "req-inl.h"
 
 
-/*
- * Threshold of active udp streams for which to preallocate udp read buffers.
- */
-const unsigned int uv_active_udp_streams_threshold = 0;
-
 /* A zero-size buffer for use by uv_udp_read */
 static char uv_zero_[] = "";
 int uv_udp_getpeername(const uv_udp_t* handle,
@@ -276,84 +271,35 @@ static void uv__udp_queue_recv(uv_loop_t* loop, uv_udp_t* handle) {
   req = &handle->recv_req;
   memset(&req->u.io.overlapped, 0, sizeof(req->u.io.overlapped));
 
-  /*
-   * Preallocate a read buffer if the number of active streams is below
-   * the threshold.
-  */
-  if (loop->active_udp_streams < uv_active_udp_streams_threshold) {
-    handle->flags &= ~UV_HANDLE_ZERO_READ;
+  handle->flags |= UV_HANDLE_ZERO_READ;
 
-    handle->recv_buffer = uv_buf_init(NULL, 0);
-    handle->alloc_cb((uv_handle_t*) handle, UV__UDP_DGRAM_MAXSIZE, &handle->recv_buffer);
-    if (handle->recv_buffer.base == NULL || handle->recv_buffer.len == 0) {
-      handle->recv_cb(handle, UV_ENOBUFS, &handle->recv_buffer, NULL, 0);
-      return;
-    }
-    assert(handle->recv_buffer.base != NULL);
+  buf.base = (char*) uv_zero_;
+  buf.len = 0;
+  flags = MSG_PEEK;
 
-    buf = handle->recv_buffer;
-    memset(&handle->recv_from, 0, sizeof handle->recv_from);
-    handle->recv_from_len = sizeof handle->recv_from;
-    flags = 0;
-
-    result = handle->func_wsarecvfrom(handle->socket,
-                                      (WSABUF*) &buf,
-                                      1,
-                                      &bytes,
-                                      &flags,
-                                      (struct sockaddr*) &handle->recv_from,
-                                      &handle->recv_from_len,
-                                      &req->u.io.overlapped,
-                                      NULL);
-
-    if (UV_SUCCEEDED_WITHOUT_IOCP(result == 0)) {
-      /* Process the req without IOCP. */
-      handle->flags |= UV_HANDLE_READ_PENDING;
-      req->u.io.overlapped.InternalHigh = bytes;
-      handle->reqs_pending++;
-      uv__insert_pending_req(loop, req);
-    } else if (UV_SUCCEEDED_WITH_IOCP(result == 0)) {
-      /* The req will be processed with IOCP. */
-      handle->flags |= UV_HANDLE_READ_PENDING;
-      handle->reqs_pending++;
-    } else {
-      /* Make this req pending reporting an error. */
-      SET_REQ_ERROR(req, WSAGetLastError());
-      uv__insert_pending_req(loop, req);
-      handle->reqs_pending++;
-    }
+  result = handle->func_wsarecv(handle->socket,
+                                (WSABUF*) &buf,
+                                1,
+                                &bytes,
+                                &flags,
+                                &req->u.io.overlapped,
+                                NULL);
 
+  if (UV_SUCCEEDED_WITHOUT_IOCP(result == 0)) {
+    /* Process the req without IOCP. */
+    handle->flags |= UV_HANDLE_READ_PENDING;
+    req->u.io.overlapped.InternalHigh = bytes;
+    handle->reqs_pending++;
+    uv__insert_pending_req(loop, req);
+  } else if (UV_SUCCEEDED_WITH_IOCP(result == 0)) {
+    /* The req will be processed with IOCP. */
+    handle->flags |= UV_HANDLE_READ_PENDING;
+    handle->reqs_pending++;
   } else {
-    handle->flags |= UV_HANDLE_ZERO_READ;
-
-    buf.base = (char*) uv_zero_;
-    buf.len = 0;
-    flags = MSG_PEEK;
-
-    result = handle->func_wsarecv(handle->socket,
-                                  (WSABUF*) &buf,
-                                  1,
-                                  &bytes,
-                                  &flags,
-                                  &req->u.io.overlapped,
-                                  NULL);
-
-    if (UV_SUCCEEDED_WITHOUT_IOCP(result == 0)) {
-      /* Process the req without IOCP. */
-      handle->flags |= UV_HANDLE_READ_PENDING;
-      req->u.io.overlapped.InternalHigh = bytes;
-      handle->reqs_pending++;
-      uv__insert_pending_req(loop, req);
-    } else if (UV_SUCCEEDED_WITH_IOCP(result == 0)) {
-      /* The req will be processed with IOCP. */
-      handle->flags |= UV_HANDLE_READ_PENDING;
-      handle->reqs_pending++;
-    } else {
-      /* Make this req pending reporting an error. */
-      SET_REQ_ERROR(req, WSAGetLastError());
-      uv__insert_pending_req(loop, req);
-      handle->reqs_pending++;
-    }
+    /* Make this req pending reporting an error. */
+    SET_REQ_ERROR(req, WSAGetLastError());
+    uv__insert_pending_req(loop, req);
+    handle->reqs_pending++;
   }
 }
 
@@ -376,7 +322,6 @@ int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb,
 
   handle->flags |= UV_HANDLE_READING;
   INCREASE_ACTIVE_COUNT(loop, handle);
-  loop->active_udp_streams++;
 
   handle->recv_cb = recv_cb;
   handle->alloc_cb = alloc_cb;
@@ -393,7 +338,6 @@ int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb,
 int uv__udp_recv_stop(uv_udp_t* handle) {
   if (handle->flags & UV_HANDLE_READING) {
     handle->flags &= ~UV_HANDLE_READING;
-    handle->loop->active_udp_streams--;
     DECREASE_ACTIVE_COUNT(loop, handle);
   }
 
@@ -497,57 +441,68 @@ void uv__process_udp_recv_req(uv_loop_t* loop, uv_udp_t* handle,
     DWORD bytes, err, flags;
     struct sockaddr_storage from;
     int from_len;
+    int count;
 
-    /* Do a nonblocking receive.
-     * TODO: try to read multiple datagrams at once. FIONREAD maybe? */
-    buf = uv_buf_init(NULL, 0);
-    handle->alloc_cb((uv_handle_t*) handle, UV__UDP_DGRAM_MAXSIZE, &buf);
-    if (buf.base == NULL || buf.len == 0) {
-      handle->recv_cb(handle, UV_ENOBUFS, &buf, NULL, 0);
-      goto done;
-    }
-    assert(buf.base != NULL);
+    /* Prevent loop starvation when the data comes in as fast as
+     * (or faster than) we can read it. */
+    count = 32;
 
-    memset(&from, 0, sizeof from);
-    from_len = sizeof from;
+    do {
+      /* Do at most `count` nonblocking receive. */
+      buf = uv_buf_init(NULL, 0);
+      handle->alloc_cb((uv_handle_t*) handle, UV__UDP_DGRAM_MAXSIZE, &buf);
+      if (buf.base == NULL || buf.len == 0) {
+        handle->recv_cb(handle, UV_ENOBUFS, &buf, NULL, 0);
+        goto done;
+      }
 
-    flags = 0;
+      memset(&from, 0, sizeof from);
+      from_len = sizeof from;
 
-    if (WSARecvFrom(handle->socket,
-                    (WSABUF*)&buf,
-                    1,
-                    &bytes,
-                    &flags,
-                    (struct sockaddr*) &from,
-                    &from_len,
-                    NULL,
-                    NULL) != SOCKET_ERROR) {
+      flags = 0;
 
-      /* Message received */
-      handle->recv_cb(handle, bytes, &buf, (const struct sockaddr*) &from, 0);
-    } else {
-      err = WSAGetLastError();
-      if (err == WSAEMSGSIZE) {
-        /* Message truncated */
-        handle->recv_cb(handle,
-                        bytes,
-                        &buf,
-                        (const struct sockaddr*) &from,
-                        UV_UDP_PARTIAL);
-      } else if (err == WSAEWOULDBLOCK) {
-        /* Kernel buffer empty */
-        handle->recv_cb(handle, 0, &buf, NULL, 0);
-      } else if (err == WSAECONNRESET || err == WSAENETRESET) {
-        /* WSAECONNRESET/WSANETRESET is ignored because this just indicates
-         * that a previous sendto operation failed.
-         */
-        handle->recv_cb(handle, 0, &buf, NULL, 0);
+      if (WSARecvFrom(handle->socket,
+                      (WSABUF*)&buf,
+                      1,
+                      &bytes,
+                      &flags,
+                      (struct sockaddr*) &from,
+                      &from_len,
+                      NULL,
+                      NULL) != SOCKET_ERROR) {
+
+        /* Message received */
+        err = ERROR_SUCCESS;
+        handle->recv_cb(handle, bytes, &buf, (const struct sockaddr*) &from, 0);
       } else {
-        /* Any other error that we want to report back to the user. */
-        uv_udp_recv_stop(handle);
-        handle->recv_cb(handle, uv_translate_sys_error(err), &buf, NULL, 0);
+        err = WSAGetLastError();
+        if (err == WSAEMSGSIZE) {
+          /* Message truncated */
+          handle->recv_cb(handle,
+                          bytes,
+                          &buf,
+                          (const struct sockaddr*) &from,
+                          UV_UDP_PARTIAL);
+        } else if (err == WSAEWOULDBLOCK) {
+          /* Kernel buffer empty */
+          handle->recv_cb(handle, 0, &buf, NULL, 0);
+        } else if (err == WSAECONNRESET || err == WSAENETRESET) {
+          /* WSAECONNRESET/WSANETRESET is ignored because this just indicates
+           * that a previous sendto operation failed.
+           */
+          handle->recv_cb(handle, 0, &buf, NULL, 0);
+        } else {
+          /* Any other error that we want to report back to the user. */
+          uv_udp_recv_stop(handle);
+          handle->recv_cb(handle, uv_translate_sys_error(err), &buf, NULL, 0);
+        }
       }
     }
+    while (err == ERROR_SUCCESS &&
+           count-- > 0 &&
+           /* The recv_cb callback may decide to pause or close the handle. */
+           (handle->flags & UV_HANDLE_READING) &&
+           !(handle->flags & UV_HANDLE_READ_PENDING));
   }
 
 done:

deps/libuv/src/win/util.c

@@ -31,6 +31,7 @@
 #include "internal.h"
 
 /* clang-format off */
+#include <sysinfoapi.h>
 #include <winsock2.h>
 #include <winperf.h>
 #include <iphlpapi.h>
@@ -121,9 +122,6 @@ int uv_exepath(char* buffer, size_t* size_ptr) {
     goto error;
   }
 
-  /* utf16_len contains the length, *not* including the terminating null. */
-  utf16_buffer[utf16_len] = L'\0';
-
   /* Convert to UTF-8 */
   utf8_len = WideCharToMultiByte(CP_UTF8,
                                  0,
@@ -151,6 +149,51 @@ int uv_exepath(char* buffer, size_t* size_ptr) {
 }
 
 
+static int uv__cwd(WCHAR** buf, DWORD *len) {
+  WCHAR* p;
+  DWORD n;
+  DWORD t;
+
+  t = GetCurrentDirectoryW(0, NULL);
+  for (;;) {
+    if (t == 0)
+      return uv_translate_sys_error(GetLastError());
+
+    /* |t| is the size of the buffer _including_ nul. */
+    p = uv__malloc(t * sizeof(*p));
+    if (p == NULL)
+      return UV_ENOMEM;
+
+    /* |n| is the size of the buffer _excluding_ nul but _only on success_.
+     * If |t| was too small because another thread changed the working
+     * directory, |n| is the size the buffer should be _including_ nul.
+     * It therefore follows we must resize when n >= t and fail when n == 0.
+     */
+    n = GetCurrentDirectoryW(t, p);
+    if (n > 0)
+      if (n < t)
+        break;
+
+    uv__free(p);
+    t = n;
+  }
+
+  /* The returned directory should not have a trailing slash, unless it points
+   * at a drive root, like c:\. Remove it if needed.
+   */
+  t = n - 1;
+  if (p[t] == L'\\' && !(n == 3 && p[1] == L':')) {
+    p[t] = L'\0';
+    n = t;
+  }
+
+  *buf = p;
+  *len = n;
+
+  return 0;
+}
+
+
 int uv_cwd(char* buffer, size_t* size) {
   DWORD utf16_len;
   WCHAR *utf16_buffer;
@@ -160,30 +203,9 @@ int uv_cwd(char* buffer, size_t* size) {
     return UV_EINVAL;
   }
 
-  utf16_len = GetCurrentDirectoryW(0, NULL);
-  if (utf16_len == 0) {
-    return uv_translate_sys_error(GetLastError());
-  }
-  utf16_buffer = uv__malloc(utf16_len * sizeof(WCHAR));
-  if (utf16_buffer == NULL) {
-    return UV_ENOMEM;
-  }
-
-  utf16_len = GetCurrentDirectoryW(utf16_len, utf16_buffer);
-  if (utf16_len == 0) {
-    uv__free(utf16_buffer);
-    return uv_translate_sys_error(GetLastError());
-  }
-
-  /* utf16_len contains the length, *not* including the terminating null. */
-  utf16_buffer[utf16_len] = L'\0';
-
-  /* The returned directory should not have a trailing slash, unless it points
-   * at a drive root, like c:\. Remove it if needed. */
-  if (utf16_buffer[utf16_len - 1] == L'\\' &&
-      !(utf16_len == 3 && utf16_buffer[1] == L':')) {
-    utf16_len--;
-    utf16_buffer[utf16_len] = L'\0';
+  r = uv__cwd(&utf16_buffer, &utf16_len);
+  if (r < 0) {
+    return r;
   }
 
   /* Check how much space we need */
@@ -226,8 +248,9 @@ int uv_cwd(char* buffer, size_t* size) {
 
 int uv_chdir(const char* dir) {
   WCHAR *utf16_buffer;
-  size_t utf16_len, new_utf16_len;
+  DWORD utf16_len;
   WCHAR drive_letter, env_var[4];
+  int r;
 
   if (dir == NULL) {
     return UV_EINVAL;
@@ -262,32 +285,22 @@ int uv_chdir(const char* dir) {
     return uv_translate_sys_error(GetLastError());
   }
 
+  /* uv__cwd() will return a new buffer. */
+  uv__free(utf16_buffer);
+  utf16_buffer = NULL;
+
   /* Windows stores the drive-local path in an "hidden" environment variable,
    * which has the form "=C:=C:\Windows". SetCurrentDirectory does not update
    * this, so we'll have to do it. */
-  new_utf16_len = GetCurrentDirectoryW(utf16_len, utf16_buffer);
-  if (new_utf16_len > utf16_len ) {
-    uv__free(utf16_buffer);
-    utf16_buffer = uv__malloc(new_utf16_len * sizeof(WCHAR));
-    if (utf16_buffer == NULL) {
-      /* When updating the environment variable fails, return UV_OK anyway.
-       * We did successfully change current working directory, only updating
-       * hidden env variable failed. */
-      return 0;
-    }
-    new_utf16_len = GetCurrentDirectoryW(new_utf16_len, utf16_buffer);
-  }
-  if (utf16_len == 0) {
-    uv__free(utf16_buffer);
+  r = uv__cwd(&utf16_buffer, &utf16_len);
+  if (r == UV_ENOMEM) {
+    /* When updating the environment variable fails, return UV_OK anyway.
+     * We did successfully change current working directory, only updating
+     * hidden env variable failed. */
     return 0;
   }
-
-  /* The returned directory should not have a trailing slash, unless it points
-   * at a drive root, like c:\. Remove it if needed. */
-  if (utf16_buffer[utf16_len - 1] == L'\\' &&
-      !(utf16_len == 3 && utf16_buffer[1] == L':')) {
-    utf16_len--;
-    utf16_buffer[utf16_len] = L'\0';
+  if (r < 0) {
+    return r;
   }
 
   if (utf16_len < 2 || utf16_buffer[1] != L':') {
@@ -330,7 +343,7 @@ uint64_t uv_get_free_memory(void) {
   memory_status.dwLength = sizeof(memory_status);
 
   if (!GlobalMemoryStatusEx(&memory_status)) {
-     return -1;
+     return 0;
   }
 
   return (uint64_t)memory_status.ullAvailPhys;
@@ -342,7 +355,7 @@ uint64_t uv_get_total_memory(void) {
   memory_status.dwLength = sizeof(memory_status);
 
   if (!GlobalMemoryStatusEx(&memory_status)) {
-    return -1;
+    return 0;
   }
 
   return (uint64_t)memory_status.ullTotalPhys;
@@ -354,6 +367,11 @@ uint64_t uv_get_constrained_memory(void) {
 }
 
 
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}
+
+
 uv_pid_t uv_os_getpid(void) {
   return GetCurrentProcessId();
 }
@@ -487,11 +505,43 @@ int uv_get_process_title(char* buffer, size_t size) {
 }
 
 
+/* https://github.com/libuv/libuv/issues/1674 */
+int uv_clock_gettime(uv_clock_id clock_id, uv_timespec64_t* ts) {
+  FILETIME ft;
+  int64_t t;
+
+  if (ts == NULL)
+    return UV_EFAULT;
+
+  switch (clock_id) {
+    case UV_CLOCK_MONOTONIC:
+      uv__once_init();
+      t = uv__hrtime(UV__NANOSEC);
+      ts->tv_sec = t / 1000000000;
+      ts->tv_nsec = t % 1000000000;
+      return 0;
+    case UV_CLOCK_REALTIME:
+      GetSystemTimePreciseAsFileTime(&ft);
+      /* In 100-nanosecond increments from 1601-01-01 UTC because why not? */
+      t = (int64_t) ft.dwHighDateTime << 32 | ft.dwLowDateTime;
+      /* Convert to UNIX epoch, 1970-01-01. Still in 100 ns increments. */
+      t -= 116444736000000000ll;
+      /* Now convert to seconds and nanoseconds. */
+      ts->tv_sec = t / 10000000;
+      ts->tv_nsec = t % 10000000 * 100;
+      return 0;
+  }
+
+  return UV_EINVAL;
+}
+
+
 uint64_t uv_hrtime(void) {
   uv__once_init();
   return uv__hrtime(UV__NANOSEC);
 }
 
+
 uint64_t uv__hrtime(unsigned int scale) {
   LARGE_INTEGER counter;
   double scaled_freq;
@@ -678,71 +728,6 @@ int uv_cpu_info(uv_cpu_info_t** cpu_infos_ptr, int* cpu_count_ptr) {
 }
 
 
-static int is_windows_version_or_greater(DWORD os_major,
-                                         DWORD os_minor,
-                                         WORD service_pack_major,
-                                         WORD service_pack_minor) {
-  OSVERSIONINFOEX osvi;
-  DWORDLONG condition_mask = 0;
-  int op = VER_GREATER_EQUAL;
-
-  /* Initialize the OSVERSIONINFOEX structure. */
-  ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
-  osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
-  osvi.dwMajorVersion = os_major;
-  osvi.dwMinorVersion = os_minor;
-  osvi.wServicePackMajor = service_pack_major;
-  osvi.wServicePackMinor = service_pack_minor;
-
-  /* Initialize the condition mask. */
-  VER_SET_CONDITION(condition_mask, VER_MAJORVERSION, op);
-  VER_SET_CONDITION(condition_mask, VER_MINORVERSION, op);
-  VER_SET_CONDITION(condition_mask, VER_SERVICEPACKMAJOR, op);
-  VER_SET_CONDITION(condition_mask, VER_SERVICEPACKMINOR, op);
-
-  /* Perform the test. */
-  return (int) VerifyVersionInfo(
-    &osvi,
-    VER_MAJORVERSION | VER_MINORVERSION |
-    VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR,
-    condition_mask);
-}
-
-
-static int address_prefix_match(int family,
-                                struct sockaddr* address,
-                                struct sockaddr* prefix_address,
-                                int prefix_len) {
-  uint8_t* address_data;
-  uint8_t* prefix_address_data;
-  int i;
-
-  assert(address->sa_family == family);
-  assert(prefix_address->sa_family == family);
-
-  if (family == AF_INET6) {
-    address_data = (uint8_t*) &(((struct sockaddr_in6 *) address)->sin6_addr);
-    prefix_address_data =
-      (uint8_t*) &(((struct sockaddr_in6 *) prefix_address)->sin6_addr);
-  } else {
-    address_data = (uint8_t*) &(((struct sockaddr_in *) address)->sin_addr);
-    prefix_address_data =
-      (uint8_t*) &(((struct sockaddr_in *) prefix_address)->sin_addr);
-  }
-
-  for (i = 0; i < prefix_len >> 3; i++) {
-    if (address_data[i] != prefix_address_data[i])
-      return 0;
-  }
-
-  if (prefix_len % 8)
-    return prefix_address_data[i] ==
-      (address_data[i] & (0xff << (8 - prefix_len % 8)));
-
-  return 1;
-}
-
-
 int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
     int* count_ptr) {
   IP_ADAPTER_ADDRESSES* win_address_buf;
@@ -755,26 +740,13 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
   uv_interface_address_t* uv_address;
 
   int count;
-
-  int is_vista_or_greater;
   ULONG flags;
 
   *addresses_ptr = NULL;
   *count_ptr = 0;
 
-  is_vista_or_greater = is_windows_version_or_greater(6, 0, 0, 0);
-  if (is_vista_or_greater) {
-    flags = GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST |
-      GAA_FLAG_SKIP_DNS_SERVER;
-  } else {
-    /* We need at least XP SP1. */
-    if (!is_windows_version_or_greater(5, 1, 1, 0))
-      return UV_ENOTSUP;
-
-    flags = GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST |
-      GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_INCLUDE_PREFIX;
-  }
-
+  flags = GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST |
+    GAA_FLAG_SKIP_DNS_SERVER;
 
   /* Fetch the size of the adapters reported by windows, and then get the list
    * itself. */
@@ -938,37 +910,8 @@ int uv_interface_addresses(uv_interface_address_t** addresses_ptr,
 
       sa = unicast_address->Address.lpSockaddr;
 
-      /* XP has no OnLinkPrefixLength field. */
-      if (is_vista_or_greater) {
-        prefix_len =
-          ((IP_ADAPTER_UNICAST_ADDRESS_LH*) unicast_address)->OnLinkPrefixLength;
-      } else {
-        /* Prior to Windows Vista the FirstPrefix pointed to the list with
-         * single prefix for each IP address assigned to the adapter.
-         * Order of FirstPrefix does not match order of FirstUnicastAddress,
-         * so we need to find corresponding prefix.
-         */
-        IP_ADAPTER_PREFIX* prefix;
-        prefix_len = 0;
-
-        for (prefix = adapter->FirstPrefix; prefix; prefix = prefix->Next) {
-          /* We want the longest matching prefix. */
-          if (prefix->Address.lpSockaddr->sa_family != sa->sa_family ||
-              prefix->PrefixLength <= prefix_len)
-            continue;
-
-          if (address_prefix_match(sa->sa_family, sa,
-              prefix->Address.lpSockaddr, prefix->PrefixLength)) {
-            prefix_len = prefix->PrefixLength;
-          }
-        }
-
-        /* If there is no matching prefix information, return a single-host
-         * subnet mask (e.g. 255.255.255.255 for IPv4).
-         */
-        if (!prefix_len)
-          prefix_len = (sa->sa_family == AF_INET6) ? 128 : 32;
-      }
+      prefix_len =
+        ((IP_ADAPTER_UNICAST_ADDRESS_LH*) unicast_address)->OnLinkPrefixLength;
 
       memset(uv_address, 0, sizeof *uv_address);
 
@@ -1093,8 +1036,8 @@ int uv_os_homedir(char* buffer, size_t* size) {
   if (r != UV_ENOENT)
     return r;
 
-  /* USERPROFILE is not set, so call uv__getpwuid_r() */
-  r = uv__getpwuid_r(&pwd);
+  /* USERPROFILE is not set, so call uv_os_get_passwd() */
+  r = uv_os_get_passwd(&pwd);
 
   if (r != 0) {
     return r;
@@ -1181,17 +1124,6 @@ int uv_os_tmpdir(char* buffer, size_t* size) {
 }
 
 
-void uv_os_free_passwd(uv_passwd_t* pwd) {
-  if (pwd == NULL)
-    return;
-
-  uv__free(pwd->username);
-  uv__free(pwd->homedir);
-  pwd->username = NULL;
-  pwd->homedir = NULL;
-}
-
-
 /*
  * Converts a UTF-16 string into a UTF-8 one. The resulting string is
  * null-terminated.
@@ -1288,7 +1220,7 @@ int uv__convert_utf8_to_utf16(const char* utf8, int utf8len, WCHAR** utf16) {
 }
 
 
-int uv__getpwuid_r(uv_passwd_t* pwd) {
+static int uv__getpwuid_r(uv_passwd_t* pwd) {
   HANDLE token;
   wchar_t username[UNLEN + 1];
   wchar_t *path;
@@ -1366,6 +1298,16 @@ int uv_os_get_passwd(uv_passwd_t* pwd) {
 }
 
 
+int uv_os_get_passwd2(uv_passwd_t* pwd, uv_uid_t uid) {
+  return UV_ENOTSUP;
+}
+
+
+int uv_os_get_group(uv_group_t* grp, uv_uid_t gid) {
+  return UV_ENOTSUP;
+}
+
+
 int uv_os_environ(uv_env_item_t** envitems, int* count) {
   wchar_t* env;
   wchar_t* penv;
@@ -1769,6 +1711,22 @@ int uv_os_uname(uv_utsname_t* buffer) {
     RegCloseKey(registry_key);
 
     if (r == ERROR_SUCCESS) {
+      /* Windows 11 shares dwMajorVersion with Windows 10
+       * this workaround tries to disambiguate that by checking
+       * if the dwBuildNumber is from Windows 11 releases (>= 22000).
+       *
+       * This workaround replaces the ProductName key value
+       * from "Windows 10 *" to "Windows 11 *" */
+      if (os_info.dwMajorVersion == 10 &&
+          os_info.dwBuildNumber >= 22000 &&
+          product_name_w_size >= ARRAY_SIZE(L"Windows 10")) {
+        /* If ProductName starts with "Windows 10" */
+        if (wcsncmp(product_name_w, L"Windows 10", ARRAY_SIZE(L"Windows 10") - 1) == 0) {
+          /* Bump 10 to 11 */
+          product_name_w[9] = '1';
+        }
+      }
+
       version_size = WideCharToMultiByte(CP_UTF8,
                                          0,
                                          product_name_w,