forked from cory/tildefriends
Use libbacktrace to generate better leak callstacks.
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3986 ed5197a5-7fde-0310-b194-c3ffbd925b24
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161
deps/libbacktrace/ttest.c
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161
deps/libbacktrace/ttest.c
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/* ttest.c -- Test for libbacktrace library
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Copyright (C) 2017-2021 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Google.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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(1) Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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(2) Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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(3) The name of the author may not be used to
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endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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/* Test using the libbacktrace library from multiple threads. */
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pthread.h>
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#include "filenames.h"
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#include "backtrace.h"
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#include "backtrace-supported.h"
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#include "testlib.h"
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static int f2 (int) __attribute__ ((noinline));
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static int f3 (int, int) __attribute__ ((noinline));
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/* Test that a simple backtrace works. This is called via
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pthread_create. It returns the number of failures, as void *. */
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static void *
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test1_thread (void *arg ATTRIBUTE_UNUSED)
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{
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/* Returning a value here and elsewhere avoids a tailcall which
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would mess up the backtrace. */
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return (void *) (uintptr_t) (f2 (__LINE__) - 2);
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}
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static int
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f2 (int f1line)
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{
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return f3 (f1line, __LINE__) + 2;
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}
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static int
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f3 (int f1line, int f2line)
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{
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struct info all[20];
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struct bdata data;
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int f3line;
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int i;
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data.all = &all[0];
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data.index = 0;
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data.max = 20;
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data.failed = 0;
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f3line = __LINE__ + 1;
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i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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if (i != 0)
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{
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fprintf (stderr, "test1: unexpected return value %d\n", i);
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data.failed = 1;
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}
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if (data.index < 3)
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{
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fprintf (stderr,
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"test1: not enough frames; got %zu, expected at least 3\n",
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data.index);
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data.failed = 1;
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}
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check ("test1", 0, all, f3line, "f3", "ttest.c", &data.failed);
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check ("test1", 1, all, f2line, "f2", "ttest.c", &data.failed);
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check ("test1", 2, all, f1line, "test1_thread", "ttest.c", &data.failed);
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return data.failed;
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}
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/* Run the test with 10 threads simultaneously. */
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#define THREAD_COUNT 10
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static void test1 (void) __attribute__ ((unused));
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static void
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test1 (void)
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{
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pthread_t atid[THREAD_COUNT];
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int i;
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int errnum;
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int this_fail;
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void *ret;
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for (i = 0; i < THREAD_COUNT; i++)
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{
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errnum = pthread_create (&atid[i], NULL, test1_thread, NULL);
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if (errnum != 0)
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{
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fprintf (stderr, "pthread_create %d: %s\n", i, strerror (errnum));
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exit (EXIT_FAILURE);
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}
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}
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this_fail = 0;
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for (i = 0; i < THREAD_COUNT; i++)
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{
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errnum = pthread_join (atid[i], &ret);
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if (errnum != 0)
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{
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fprintf (stderr, "pthread_join %d: %s\n", i, strerror (errnum));
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exit (EXIT_FAILURE);
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}
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this_fail += (int) (uintptr_t) ret;
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}
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printf ("%s: threaded backtrace_full noinline\n", this_fail > 0 ? "FAIL" : "PASS");
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failures += this_fail;
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}
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int
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main (int argc ATTRIBUTE_UNUSED, char **argv)
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{
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state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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error_callback_create, NULL);
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#if BACKTRACE_SUPPORTED
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#if BACKTRACE_SUPPORTS_THREADS
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test1 ();
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#endif
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#endif
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exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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