1/* edtest.c -- Test for libbacktrace storage allocation stress handling 2 Copyright (C) 2017-2021 Free Software Foundation, Inc. 3 4Redistribution and use in source and binary forms, with or without 5modification, are permitted provided that the following conditions are 6met: 7 8 (1) Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 11 (2) Redistributions in binary form must reproduce the above copyright 12 notice, this list of conditions and the following disclaimer in 13 the documentation and/or other materials provided with the 14 distribution. 15 16 (3) The name of the author may not be used to 17 endorse or promote products derived from this software without 18 specific prior written permission. 19 20THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 24INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30POSSIBILITY OF SUCH DAMAGE. */ 31 32#include "config.h" 33 34#include <assert.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <string.h> 38#include <sys/types.h> 39 40#include "backtrace.h" 41#include "backtrace-supported.h" 42#include "internal.h" 43 44#include "testlib.h" 45 46static int test1 (void) __attribute__ ((noinline, noclone, unused)); 47extern int f2 (int); 48extern int f3 (int, int); 49 50static int 51test1 (void) 52{ 53 /* Returning a value here and elsewhere avoids a tailcall which 54 would mess up the backtrace. */ 55 return f2 (__LINE__) + 1; 56} 57 58int 59f3 (int f1line, int f2line) 60{ 61 struct info all[20]; 62 struct bdata data; 63 int f3line; 64 int i; 65 66 data.all = &all[0]; 67 data.index = 0; 68 data.max = 20; 69 data.failed = 0; 70 71 f3line = __LINE__ + 1; 72 i = backtrace_full (state, 0, callback_one, error_callback_one, &data); 73 74 if (i != 0) 75 { 76 fprintf (stderr, "test1: unexpected return value %d\n", i); 77 data.failed = 1; 78 } 79 80 if (data.index < 3) 81 { 82 fprintf (stderr, 83 "test1: not enough frames; got %zu, expected at least 3\n", 84 data.index); 85 data.failed = 1; 86 } 87 88 check ("test1", 0, all, f3line, "f3", "edtest.c", &data.failed); 89 check ("test1", 1, all, f2line, "f2", "edtest2_build.c", &data.failed); 90 check ("test1", 2, all, f1line, "test1", "edtest.c", &data.failed); 91 92 printf ("%s: backtrace_full alloc stress\n", data.failed ? "FAIL" : "PASS"); 93 94 if (data.failed) 95 ++failures; 96 97 return failures; 98} 99 100int 101main (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) 102{ 103 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS, 104 error_callback_create, NULL); 105 106 // Grab the storage allocation lock prior to doing anything interesting. 107 // The intent here is to insure that the backtrace_alloc code is forced 108 // to always call mmap() for new memory as opposed to reusing previously 109 // allocated memory from the free list. Doing things this way helps 110 // simulate what you might see in a multithreaded program in which there 111 // are racing calls to the allocator. 112 struct backtrace_state *state_internal = 113 (struct backtrace_state *) state; 114 state_internal->lock_alloc = 1; 115 116 // Kick off the test 117 test1(); 118 119 exit (failures > 0 ? EXIT_FAILURE : EXIT_SUCCESS); 120} 121