1 /* $NetBSD: t_backtrace.c,v 1.10 2013/08/16 11:57:15 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 1.10 2013/08/16 11:57:15 martin Exp $"); 33 34 #include <atf-c.h> 35 #include <atf-c/config.h> 36 #include <string.h> 37 #include <stdlib.h> 38 #include <execinfo.h> 39 #include <unistd.h> 40 41 #ifndef __arraycount 42 #define __arraycount(a) (sizeof(a) / sizeof(a[0])) 43 #endif 44 45 void myfunc3(size_t ncalls); 46 void myfunc2(size_t ncalls); 47 void myfunc1(size_t origcalls, volatile size_t ncalls); 48 void myfunc(size_t ncalls); 49 50 volatile int prevent_inline; 51 52 void 53 myfunc3(size_t ncalls) 54 { 55 static const char *top[] = { "myfunc", "atfu_backtrace_fmt_basic_body", 56 "atf_tc_run", "atf_tp_run", "atf_tp_main", "main", "___start" }; 57 static bool optional_frame[] = { false, false, false, true, false, 58 false, true }; 59 size_t j, nptrs, min_frames, max_frames; 60 void *buffer[ncalls + 10]; 61 char **strings; 62 __CTASSERT(__arraycount(top) == __arraycount(optional_frame)); 63 64 min_frames = 0; 65 max_frames = 0; 66 for (j = 0; j < __arraycount(optional_frame); ++j) { 67 if (!optional_frame[j]) 68 ++min_frames; 69 ++max_frames; 70 } 71 nptrs = backtrace(buffer, __arraycount(buffer)); 72 ATF_REQUIRE(nptrs >= ncalls + 2 + min_frames); 73 ATF_REQUIRE(nptrs <= ncalls + 2 + max_frames); 74 75 strings = backtrace_symbols_fmt(buffer, nptrs, "%n"); 76 77 ATF_CHECK(strings != NULL); 78 ATF_CHECK_STREQ(strings[0], "myfunc3"); 79 ATF_CHECK_STREQ(strings[1], "myfunc2"); 80 81 for (j = 2; j < ncalls + 2; j++) 82 ATF_CHECK_STREQ(strings[j], "myfunc1"); 83 84 for (size_t i = 0; j < nptrs; i++, j++) { 85 if (optional_frame[i] && strcmp(strings[j], top[i])) { 86 --i; 87 continue; 88 } 89 ATF_CHECK_STREQ(strings[j], top[i]); 90 } 91 92 free(strings); 93 94 if (prevent_inline) 95 vfork(); 96 } 97 98 void 99 myfunc2(size_t ncalls) 100 { 101 myfunc3(ncalls); 102 103 if (prevent_inline) 104 vfork(); 105 } 106 107 void 108 myfunc1(size_t origcalls, volatile size_t ncalls) 109 { 110 if (ncalls > 1) 111 myfunc1(origcalls, ncalls - 1); 112 else 113 myfunc2(origcalls); 114 115 if (prevent_inline) 116 vfork(); 117 } 118 119 void 120 myfunc(size_t ncalls) 121 { 122 myfunc1(ncalls, ncalls); 123 124 if (prevent_inline) 125 vfork(); 126 } 127 128 ATF_TC(backtrace_fmt_basic); 129 ATF_TC_HEAD(backtrace_fmt_basic, tc) 130 { 131 atf_tc_set_md_var(tc, "descr", "Test backtrace_fmt(3)"); 132 } 133 134 ATF_TC_BODY(backtrace_fmt_basic, tc) 135 { 136 myfunc(12); 137 138 if (prevent_inline) 139 vfork(); 140 } 141 142 ATF_TP_ADD_TCS(tp) 143 { 144 145 ATF_TP_ADD_TC(tp, backtrace_fmt_basic); 146 147 return atf_no_error(); 148 } 149