1 /* $NetBSD: t_backtrace.c,v 1.8 2013/07/05 09:55:39 joerg 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 1.8 2013/07/05 09:55:39 joerg 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 volatile int prevent_inline; 46 47 static void 48 myfunc3(size_t ncalls) 49 { 50 static const char *top[] = { "myfunc", "atfu_backtrace_fmt_basic_body", 51 "atf_tc_run", "atf_tp_run", "atf_tp_main", "main", "___start" }; 52 static bool optional_frame[] = { false, false, false, true, false, 53 false, true }; 54 size_t j, nptrs, min_frames, max_frames; 55 void *buffer[ncalls + 10]; 56 char **strings; 57 __CTASSERT(__arraycount(top) == __arraycount(optional_frame)); 58 59 min_frames = 0; 60 max_frames = 0; 61 for (j = 0; j < __arraycount(optional_frame); ++j) { 62 if (!optional_frame[j]) 63 ++min_frames; 64 ++max_frames; 65 } 66 nptrs = backtrace(buffer, __arraycount(buffer)); 67 ATF_REQUIRE(nptrs >= ncalls + 2 + min_frames); 68 ATF_REQUIRE(nptrs <= ncalls + 2 + max_frames); 69 70 strings = backtrace_symbols_fmt(buffer, nptrs, "%n"); 71 72 ATF_CHECK(strings != NULL); 73 ATF_CHECK_STREQ(strings[0], "myfunc3"); 74 ATF_CHECK_STREQ(strings[1], "myfunc2"); 75 76 for (j = 2; j < ncalls + 2; j++) 77 ATF_CHECK_STREQ(strings[j], "myfunc1"); 78 79 for (size_t i = 0; j < nptrs; i++, j++) { 80 if (optional_frame[i] && strcmp(strings[j], top[i])) { 81 --i; 82 continue; 83 } 84 ATF_CHECK_STREQ(strings[j], top[i]); 85 } 86 87 free(strings); 88 89 if (prevent_inline) 90 vfork(); 91 } 92 93 static void 94 myfunc2(size_t ncalls) 95 { 96 myfunc3(ncalls); 97 98 if (prevent_inline) 99 vfork(); 100 } 101 102 static void 103 myfunc1(size_t origcalls, volatile size_t ncalls) 104 { 105 if (ncalls > 1) 106 myfunc1(origcalls, ncalls - 1); 107 else 108 myfunc2(origcalls); 109 110 if (prevent_inline) 111 vfork(); 112 } 113 114 static void 115 myfunc(size_t ncalls) 116 { 117 myfunc1(ncalls, ncalls); 118 119 if (prevent_inline) 120 vfork(); 121 } 122 123 ATF_TC(backtrace_fmt_basic); 124 ATF_TC_HEAD(backtrace_fmt_basic, tc) 125 { 126 atf_tc_set_md_var(tc, "descr", "Test backtrace_fmt(3)"); 127 } 128 129 ATF_TC_BODY(backtrace_fmt_basic, tc) 130 { 131 const char *arch = atf_config_get("atf_arch"); 132 133 if (strcmp(arch, "x86_64") != 0) 134 atf_tc_skip("PR toolchain/46490: libexecinfo only" 135 " works on amd64 currently"); 136 137 myfunc(12); 138 } 139 140 ATF_TP_ADD_TCS(tp) 141 { 142 143 ATF_TP_ADD_TC(tp, backtrace_fmt_basic); 144 145 return atf_no_error(); 146 } 147