ttest.c revision 1.1.1.1
1/* ttest.c -- Test for libbacktrace library 2 Copyright (C) 2017-2018 Free Software Foundation, Inc. 3 Written by Ian Lance Taylor, Google. 4 5Redistribution and use in source and binary forms, with or without 6modification, are permitted provided that the following conditions are 7met: 8 9 (1) Redistributions of source code must retain the above copyright 10 notice, this list of conditions and the following disclaimer. 11 12 (2) Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in 14 the documentation and/or other materials provided with the 15 distribution. 16 17 (3) The name of the author may not be used to 18 endorse or promote products derived from this software without 19 specific prior written permission. 20 21THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 25INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 27SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 29STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 30IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31POSSIBILITY OF SUCH DAMAGE. */ 32 33/* Test using the libbacktrace library from multiple threads. */ 34 35#include <assert.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39 40#include <pthread.h> 41 42#include "filenames.h" 43 44#include "backtrace.h" 45#include "backtrace-supported.h" 46 47#include "testlib.h" 48 49static int f2 (int) __attribute__ ((noinline)); 50static int f3 (int, int) __attribute__ ((noinline)); 51 52/* Test that a simple backtrace works. This is called via 53 pthread_create. It returns the number of failures, as void *. */ 54 55static void * 56test1_thread (void *arg ATTRIBUTE_UNUSED) 57{ 58 /* Returning a value here and elsewhere avoids a tailcall which 59 would mess up the backtrace. */ 60 return (void *) (uintptr_t) (f2 (__LINE__) - 2); 61} 62 63static int 64f2 (int f1line) 65{ 66 return f3 (f1line, __LINE__) + 2; 67} 68 69static int 70f3 (int f1line, int f2line) 71{ 72 struct info all[20]; 73 struct bdata data; 74 int f3line; 75 int i; 76 77 data.all = &all[0]; 78 data.index = 0; 79 data.max = 20; 80 data.failed = 0; 81 82 f3line = __LINE__ + 1; 83 i = backtrace_full (state, 0, callback_one, error_callback_one, &data); 84 85 if (i != 0) 86 { 87 fprintf (stderr, "test1: unexpected return value %d\n", i); 88 data.failed = 1; 89 } 90 91 if (data.index < 3) 92 { 93 fprintf (stderr, 94 "test1: not enough frames; got %zu, expected at least 3\n", 95 data.index); 96 data.failed = 1; 97 } 98 99 check ("test1", 0, all, f3line, "f3", "ttest.c", &data.failed); 100 check ("test1", 1, all, f2line, "f2", "ttest.c", &data.failed); 101 check ("test1", 2, all, f1line, "test1_thread", "ttest.c", &data.failed); 102 103 return data.failed; 104} 105 106/* Run the test with 10 threads simultaneously. */ 107 108#define THREAD_COUNT 10 109 110static void test1 (void) __attribute__ ((unused)); 111 112static void 113test1 (void) 114{ 115 pthread_t atid[THREAD_COUNT]; 116 int i; 117 int errnum; 118 int this_fail; 119 void *ret; 120 121 for (i = 0; i < THREAD_COUNT; i++) 122 { 123 errnum = pthread_create (&atid[i], NULL, test1_thread, NULL); 124 if (errnum != 0) 125 { 126 fprintf (stderr, "pthread_create %d: %s\n", i, strerror (errnum)); 127 exit (EXIT_FAILURE); 128 } 129 } 130 131 this_fail = 0; 132 for (i = 0; i < THREAD_COUNT; i++) 133 { 134 errnum = pthread_join (atid[i], &ret); 135 if (errnum != 0) 136 { 137 fprintf (stderr, "pthread_join %d: %s\n", i, strerror (errnum)); 138 exit (EXIT_FAILURE); 139 } 140 this_fail += (int) (uintptr_t) ret; 141 } 142 143 printf ("%s: threaded backtrace_full noinline\n", this_fail > 0 ? "FAIL" : "PASS"); 144 145 failures += this_fail; 146} 147 148int 149main (int argc ATTRIBUTE_UNUSED, char **argv) 150{ 151 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS, 152 error_callback_create, NULL); 153 154#if BACKTRACE_SUPPORTED 155#if BACKTRACE_SUPPORTS_THREADS 156 test1 (); 157#endif 158#endif 159 160 exit (failures ? EXIT_FAILURE : EXIT_SUCCESS); 161} 162