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+/* ttest.c -- Test for libbacktrace library
+ Copyright (C) 2017-2021 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor, Google.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ (1) Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ (2) 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.
+
+ (3) The name of the author may not be used to
+ endorse or promote products derived from this software without
+ specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */
+
+/* Test using the libbacktrace library from multiple threads. */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <pthread.h>
+
+#include "filenames.h"
+
+#include "backtrace.h"
+#include "backtrace-supported.h"
+
+#include "testlib.h"
+
+static int f2 (int) __attribute__ ((noinline));
+static int f3 (int, int) __attribute__ ((noinline));
+
+/* Test that a simple backtrace works. This is called via
+ pthread_create. It returns the number of failures, as void *. */
+
+static void *
+test1_thread (void *arg ATTRIBUTE_UNUSED)
+{
+ /* Returning a value here and elsewhere avoids a tailcall which
+ would mess up the backtrace. */
+ return (void *) (uintptr_t) (f2 (__LINE__) - 2);
+}
+
+static int
+f2 (int f1line)
+{
+ return f3 (f1line, __LINE__) + 2;
+}
+
+static int
+f3 (int f1line, int f2line)
+{
+ struct info all[20];
+ struct bdata data;
+ int f3line;
+ int i;
+
+ data.all = &all[0];
+ data.index = 0;
+ data.max = 20;
+ data.failed = 0;
+
+ f3line = __LINE__ + 1;
+ i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
+
+ if (i != 0)
+ {
+ fprintf (stderr, "test1: unexpected return value %d\n", i);
+ data.failed = 1;
+ }
+
+ if (data.index < 3)
+ {
+ fprintf (stderr,
+ "test1: not enough frames; got %zu, expected at least 3\n",
+ data.index);
+ data.failed = 1;
+ }
+
+ check ("test1", 0, all, f3line, "f3", "ttest.c", &data.failed);
+ check ("test1", 1, all, f2line, "f2", "ttest.c", &data.failed);
+ check ("test1", 2, all, f1line, "test1_thread", "ttest.c", &data.failed);
+
+ return data.failed;
+}
+
+/* Run the test with 10 threads simultaneously. */
+
+#define THREAD_COUNT 10
+
+static void test1 (void) __attribute__ ((unused));
+
+static void
+test1 (void)
+{
+ pthread_t atid[THREAD_COUNT];
+ int i;
+ int errnum;
+ int this_fail;
+ void *ret;
+
+ for (i = 0; i < THREAD_COUNT; i++)
+ {
+ errnum = pthread_create (&atid[i], NULL, test1_thread, NULL);
+ if (errnum != 0)
+ {
+ fprintf (stderr, "pthread_create %d: %s\n", i, strerror (errnum));
+ exit (EXIT_FAILURE);
+ }
+ }
+
+ this_fail = 0;
+ for (i = 0; i < THREAD_COUNT; i++)
+ {
+ errnum = pthread_join (atid[i], &ret);
+ if (errnum != 0)
+ {
+ fprintf (stderr, "pthread_join %d: %s\n", i, strerror (errnum));
+ exit (EXIT_FAILURE);
+ }
+ this_fail += (int) (uintptr_t) ret;
+ }
+
+ printf ("%s: threaded backtrace_full noinline\n", this_fail > 0 ? "FAIL" : "PASS");
+
+ failures += this_fail;
+}
+
+int
+main (int argc ATTRIBUTE_UNUSED, char **argv)
+{
+ state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
+ error_callback_create, NULL);
+
+#if BACKTRACE_SUPPORTED
+#if BACKTRACE_SUPPORTS_THREADS
+ test1 ();
+#endif
+#endif
+
+ exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
+}