1 /* $NetBSD: t_backtrace.c,v 1.12 2014/01/11 19:48:22 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_backtrace.c,v 1.12 2014/01/11 19:48:22 martin Exp $"); 33 34 #include <atf-c.h> 35 #include <atf-c/config.h> 36 #include <string.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <execinfo.h> 40 #include <unistd.h> 41 42 #ifndef __arraycount 43 #define __arraycount(a) (sizeof(a) / sizeof(a[0])) 44 #endif 45 46 void myfunc3(size_t ncalls); 47 void myfunc2(size_t ncalls); 48 void myfunc1(size_t origcalls, volatile size_t ncalls); 49 void myfunc(size_t ncalls); 50 51 volatile int prevent_inline; 52 53 void 54 myfunc3(size_t ncalls) 55 { 56 static const char *top[] = { "myfunc", "atfu_backtrace_fmt_basic_body", 57 "atf_tc_run", "atf_tp_run", "atf_tp_main", "main", "___start" }; 58 static bool optional_frame[] = { false, false, false, true, false, 59 true, true }; 60 size_t j, nptrs, min_frames, max_frames; 61 void *buffer[ncalls + 10]; 62 char **strings; 63 __CTASSERT(__arraycount(top) == __arraycount(optional_frame)); 64 65 min_frames = 0; 66 max_frames = 0; 67 for (j = 0; j < __arraycount(optional_frame); ++j) { 68 if (!optional_frame[j]) 69 ++min_frames; 70 ++max_frames; 71 } 72 nptrs = backtrace(buffer, __arraycount(buffer)); 73 strings = backtrace_symbols_fmt(buffer, nptrs, "%n"); 74 75 ATF_CHECK(strings != NULL); 76 77 printf("got nptrs=%zu ncalls=%zu (min_frames: %zu, max_frames: %zu)\n", 78 nptrs, ncalls, min_frames, max_frames); 79 printf("backtrace is:\n"); 80 for (j = 0; j < nptrs; j++) { 81 printf("#%zu: %s\n", j, strings[j]); 82 } 83 84 ATF_REQUIRE(nptrs >= ncalls + 2 + min_frames); 85 ATF_REQUIRE(nptrs <= ncalls + 2 + max_frames); 86 ATF_CHECK_STREQ(strings[0], "myfunc3"); 87 ATF_CHECK_STREQ(strings[1], "myfunc2"); 88 89 for (j = 2; j < ncalls + 2; j++) 90 ATF_CHECK_STREQ(strings[j], "myfunc1"); 91 92 for (size_t i = 0; j < nptrs; i++, j++) { 93 if (optional_frame[i] && strcmp(strings[j], top[i])) { 94 --i; 95 continue; 96 } 97 ATF_CHECK_STREQ(strings[j], top[i]); 98 } 99 100 free(strings); 101 102 if (prevent_inline) 103 vfork(); 104 } 105 106 void 107 myfunc2(size_t ncalls) 108 { 109 myfunc3(ncalls); 110 111 if (prevent_inline) 112 vfork(); 113 } 114 115 void 116 myfunc1(size_t origcalls, volatile size_t ncalls) 117 { 118 if (ncalls > 1) 119 myfunc1(origcalls, ncalls - 1); 120 else 121 myfunc2(origcalls); 122 123 if (prevent_inline) 124 vfork(); 125 } 126 127 void 128 myfunc(size_t ncalls) 129 { 130 myfunc1(ncalls, ncalls); 131 132 if (prevent_inline) 133 vfork(); 134 } 135 136 ATF_TC(backtrace_fmt_basic); 137 ATF_TC_HEAD(backtrace_fmt_basic, tc) 138 { 139 atf_tc_set_md_var(tc, "descr", "Test backtrace_fmt(3)"); 140 } 141 142 ATF_TC_BODY(backtrace_fmt_basic, tc) 143 { 144 myfunc(12); 145 146 if (prevent_inline) 147 vfork(); 148 } 149 150 ATF_TP_ADD_TCS(tp) 151 { 152 153 ATF_TP_ADD_TC(tp, backtrace_fmt_basic); 154 155 return atf_no_error(); 156 } 157