tildefriends/deps/libuv/test/test-emfile.c

122 lines
4.0 KiB
C

/* 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.
*/
#if !defined(_WIN32)
#include "uv.h"
#include "task.h"
#include <errno.h>
#include <sys/resource.h>
#include <unistd.h>
static void connection_cb(uv_stream_t* server_handle, int status);
static void connect_cb(uv_connect_t* req, int status);
static const int maxfd = 31;
static unsigned connect_cb_called;
static uv_tcp_t server_handle;
static uv_tcp_t client_handle;
TEST_IMPL(emfile) {
struct sockaddr_in addr;
struct rlimit limits;
uv_connect_t connect_req;
uv_loop_t* loop;
int first_fd;
#if defined(_AIX) || defined(__MVS__)
/* On AIX, if a 'accept' call fails ECONNRESET is set on the socket
* which causes uv__emfile_trick to not work as intended and this test
* to fail.
*/
RETURN_SKIP("uv__emfile_trick does not work on this OS");
#endif
/* Lower the file descriptor limit and use up all fds save one. */
limits.rlim_cur = limits.rlim_max = maxfd + 1;
if (setrlimit(RLIMIT_NOFILE, &limits)) {
ASSERT(errno == EPERM); /* Valgrind blocks the setrlimit() call. */
RETURN_SKIP("setrlimit(RLIMIT_NOFILE) failed, running under valgrind?");
}
loop = uv_default_loop();
ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
ASSERT(0 == uv_tcp_init(loop, &server_handle));
ASSERT(0 == uv_tcp_init(loop, &client_handle));
ASSERT(0 == uv_tcp_bind(&server_handle, (const struct sockaddr*) &addr, 0));
ASSERT(0 == uv_listen((uv_stream_t*) &server_handle, 8, connection_cb));
/* Remember the first one so we can clean up afterwards. */
do
first_fd = dup(0);
while (first_fd == -1 && errno == EINTR);
ASSERT(first_fd > 0);
while (dup(0) != -1 || errno == EINTR);
ASSERT(errno == EMFILE);
close(maxfd);
/* Now connect and use up the last available file descriptor. The EMFILE
* handling logic in src/unix/stream.c should ensure that connect_cb() runs
* whereas connection_cb() should *not* run.
*/
ASSERT(0 == uv_tcp_connect(&connect_req,
&client_handle,
(const struct sockaddr*) &addr,
connect_cb));
ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
ASSERT(1 == connect_cb_called);
/* Close the dups again. Ignore errors in the unlikely event that the
* file descriptors were not contiguous.
*/
while (first_fd < maxfd) {
close(first_fd);
first_fd += 1;
}
MAKE_VALGRIND_HAPPY();
return 0;
}
static void connection_cb(uv_stream_t* server_handle, int status) {
ASSERT(0 && "connection_cb should not be called.");
}
static void connect_cb(uv_connect_t* req, int status) {
/* |status| should equal 0 because the connection should have been accepted,
* it's just that the server immediately closes it again.
*/
ASSERT(0 == status);
connect_cb_called += 1;
uv_close((uv_handle_t*) &server_handle, NULL);
uv_close((uv_handle_t*) &client_handle, NULL);
}
#else
typedef int file_has_no_tests; /* ISO C forbids an empty translation unit. */
#endif /* !_WIN32 */