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111
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1 /* btest.c -- Test for libbacktrace library
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145
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2 Copyright (C) 2012-2020 Free Software Foundation, Inc.
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111
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3 Written by Ian Lance Taylor, Google.
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4
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5 Redistribution and use in source and binary forms, with or without
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6 modification, are permitted provided that the following conditions are
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7 met:
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8
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9 (1) Redistributions of source code must retain the above copyright
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10 notice, this list of conditions and the following disclaimer.
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11
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12 (2) Redistributions in binary form must reproduce the above copyright
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13 notice, this list of conditions and the following disclaimer in
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14 the documentation and/or other materials provided with the
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15 distribution.
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16
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17 (3) The name of the author may not be used to
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18 endorse or promote products derived from this software without
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19 specific prior written permission.
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20
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21 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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22 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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23 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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24 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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25 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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26 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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27 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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29 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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31 POSSIBILITY OF SUCH DAMAGE. */
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32
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33 /* This program tests the externally visible interfaces of the
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34 libbacktrace library. */
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35
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36 #include <assert.h>
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37 #include <stdio.h>
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38 #include <stdlib.h>
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39 #include <string.h>
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131
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40 #include <unistd.h>
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111
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41
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42 #include "filenames.h"
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43
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44 #include "backtrace.h"
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45 #include "backtrace-supported.h"
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46
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47 #include "testlib.h"
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48
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49 /* Test the backtrace function with non-inlined functions. */
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50
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145
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51 static int test1 (void) __attribute__ ((noinline, noclone, unused));
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52 static int f2 (int) __attribute__ ((noinline, noclone));
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53 static int f3 (int, int) __attribute__ ((noinline, noclone));
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111
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54
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55 static int
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56 test1 (void)
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57 {
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58 /* Returning a value here and elsewhere avoids a tailcall which
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59 would mess up the backtrace. */
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60 return f2 (__LINE__) + 1;
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61 }
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62
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63 static int
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64 f2 (int f1line)
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65 {
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66 return f3 (f1line, __LINE__) + 2;
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67 }
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68
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69 static int
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70 f3 (int f1line, int f2line)
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71 {
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72 struct info all[20];
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73 struct bdata data;
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74 int f3line;
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75 int i;
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76
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77 data.all = &all[0];
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78 data.index = 0;
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79 data.max = 20;
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80 data.failed = 0;
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81
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82 f3line = __LINE__ + 1;
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83 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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84
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85 if (i != 0)
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86 {
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87 fprintf (stderr, "test1: unexpected return value %d\n", i);
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88 data.failed = 1;
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89 }
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90
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91 if (data.index < 3)
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92 {
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93 fprintf (stderr,
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94 "test1: not enough frames; got %zu, expected at least 3\n",
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95 data.index);
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96 data.failed = 1;
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97 }
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98
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99 check ("test1", 0, all, f3line, "f3", "btest.c", &data.failed);
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100 check ("test1", 1, all, f2line, "f2", "btest.c", &data.failed);
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101 check ("test1", 2, all, f1line, "test1", "btest.c", &data.failed);
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102
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103 printf ("%s: backtrace_full noinline\n", data.failed ? "FAIL" : "PASS");
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104
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105 if (data.failed)
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106 ++failures;
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107
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108 return failures;
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109 }
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110
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111 /* Test the backtrace function with inlined functions. */
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112
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113 static inline int test2 (void) __attribute__ ((always_inline, unused));
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114 static inline int f12 (int) __attribute__ ((always_inline));
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115 static inline int f13 (int, int) __attribute__ ((always_inline));
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116
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117 static inline int
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118 test2 (void)
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119 {
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120 return f12 (__LINE__) + 1;
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121 }
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122
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123 static inline int
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124 f12 (int f1line)
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125 {
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126 return f13 (f1line, __LINE__) + 2;
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127 }
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128
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129 static inline int
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130 f13 (int f1line, int f2line)
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131 {
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132 struct info all[20];
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133 struct bdata data;
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134 int f3line;
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135 int i;
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136
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137 data.all = &all[0];
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138 data.index = 0;
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139 data.max = 20;
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140 data.failed = 0;
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141
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142 f3line = __LINE__ + 1;
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143 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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144
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145 if (i != 0)
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146 {
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147 fprintf (stderr, "test2: unexpected return value %d\n", i);
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148 data.failed = 1;
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149 }
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150
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151 check ("test2", 0, all, f3line, "f13", "btest.c", &data.failed);
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152 check ("test2", 1, all, f2line, "f12", "btest.c", &data.failed);
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153 check ("test2", 2, all, f1line, "test2", "btest.c", &data.failed);
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154
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155 printf ("%s: backtrace_full inline\n", data.failed ? "FAIL" : "PASS");
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156
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157 if (data.failed)
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158 ++failures;
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159
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160 return failures;
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161 }
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162
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163 /* Test the backtrace_simple function with non-inlined functions. */
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164
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145
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165 static int test3 (void) __attribute__ ((noinline, noclone, unused));
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166 static int f22 (int) __attribute__ ((noinline, noclone));
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167 static int f23 (int, int) __attribute__ ((noinline, noclone));
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111
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168
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169 static int
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170 test3 (void)
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171 {
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172 return f22 (__LINE__) + 1;
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173 }
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174
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175 static int
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176 f22 (int f1line)
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177 {
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178 return f23 (f1line, __LINE__) + 2;
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179 }
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180
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181 static int
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182 f23 (int f1line, int f2line)
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183 {
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184 uintptr_t addrs[20];
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185 struct sdata data;
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186 int f3line;
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187 int i;
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188
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189 data.addrs = &addrs[0];
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190 data.index = 0;
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191 data.max = 20;
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192 data.failed = 0;
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193
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194 f3line = __LINE__ + 1;
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195 i = backtrace_simple (state, 0, callback_two, error_callback_two, &data);
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196
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197 if (i != 0)
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198 {
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199 fprintf (stderr, "test3: unexpected return value %d\n", i);
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200 data.failed = 1;
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201 }
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202
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203 if (!data.failed)
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204 {
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205 struct info all[20];
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206 struct bdata bdata;
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207 int j;
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208
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209 bdata.all = &all[0];
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210 bdata.index = 0;
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211 bdata.max = 20;
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212 bdata.failed = 0;
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213
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214 for (j = 0; j < 3; ++j)
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215 {
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216 i = backtrace_pcinfo (state, addrs[j], callback_one,
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217 error_callback_one, &bdata);
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218 if (i != 0)
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219 {
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220 fprintf (stderr,
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221 ("test3: unexpected return value "
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222 "from backtrace_pcinfo %d\n"),
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223 i);
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224 bdata.failed = 1;
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225 }
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226 if (!bdata.failed && bdata.index != (size_t) (j + 1))
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227 {
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228 fprintf (stderr,
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229 ("wrong number of calls from backtrace_pcinfo "
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230 "got %u expected %d\n"),
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231 (unsigned int) bdata.index, j + 1);
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232 bdata.failed = 1;
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233 }
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234 }
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235
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236 check ("test3", 0, all, f3line, "f23", "btest.c", &bdata.failed);
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237 check ("test3", 1, all, f2line, "f22", "btest.c", &bdata.failed);
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238 check ("test3", 2, all, f1line, "test3", "btest.c", &bdata.failed);
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239
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240 if (bdata.failed)
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241 data.failed = 1;
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242
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243 for (j = 0; j < 3; ++j)
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244 {
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245 struct symdata symdata;
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246
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247 symdata.name = NULL;
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248 symdata.val = 0;
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249 symdata.size = 0;
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250 symdata.failed = 0;
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251
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252 i = backtrace_syminfo (state, addrs[j], callback_three,
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253 error_callback_three, &symdata);
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254 if (i == 0)
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255 {
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256 fprintf (stderr,
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257 ("test3: [%d]: unexpected return value "
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258 "from backtrace_syminfo %d\n"),
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259 j, i);
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260 symdata.failed = 1;
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261 }
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262
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263 if (!symdata.failed)
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264 {
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265 const char *expected;
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266
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267 switch (j)
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268 {
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269 case 0:
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270 expected = "f23";
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271 break;
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272 case 1:
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273 expected = "f22";
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274 break;
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275 case 2:
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276 expected = "test3";
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277 break;
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278 default:
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279 assert (0);
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280 }
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281
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282 if (symdata.name == NULL)
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283 {
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284 fprintf (stderr, "test3: [%d]: NULL syminfo name\n", j);
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285 symdata.failed = 1;
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286 }
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287 /* Use strncmp, not strcmp, because GCC might create a
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288 clone. */
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289 else if (strncmp (symdata.name, expected, strlen (expected))
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290 != 0)
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291 {
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292 fprintf (stderr,
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293 ("test3: [%d]: unexpected syminfo name "
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294 "got %s expected %s\n"),
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295 j, symdata.name, expected);
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296 symdata.failed = 1;
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297 }
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298 }
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299
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300 if (symdata.failed)
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301 data.failed = 1;
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302 }
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303 }
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304
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305 printf ("%s: backtrace_simple noinline\n", data.failed ? "FAIL" : "PASS");
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306
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307 if (data.failed)
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308 ++failures;
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309
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310 return failures;
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311 }
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312
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313 /* Test the backtrace_simple function with inlined functions. */
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314
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315 static inline int test4 (void) __attribute__ ((always_inline, unused));
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316 static inline int f32 (int) __attribute__ ((always_inline));
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317 static inline int f33 (int, int) __attribute__ ((always_inline));
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318
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319 static inline int
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320 test4 (void)
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321 {
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322 return f32 (__LINE__) + 1;
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323 }
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324
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325 static inline int
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326 f32 (int f1line)
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327 {
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328 return f33 (f1line, __LINE__) + 2;
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329 }
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330
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331 static inline int
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332 f33 (int f1line, int f2line)
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333 {
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334 uintptr_t addrs[20];
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335 struct sdata data;
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336 int f3line;
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337 int i;
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338
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339 data.addrs = &addrs[0];
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340 data.index = 0;
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341 data.max = 20;
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342 data.failed = 0;
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343
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344 f3line = __LINE__ + 1;
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345 i = backtrace_simple (state, 0, callback_two, error_callback_two, &data);
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346
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347 if (i != 0)
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348 {
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349 fprintf (stderr, "test3: unexpected return value %d\n", i);
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350 data.failed = 1;
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351 }
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352
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353 if (!data.failed)
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354 {
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355 struct info all[20];
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356 struct bdata bdata;
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357
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358 bdata.all = &all[0];
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359 bdata.index = 0;
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360 bdata.max = 20;
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361 bdata.failed = 0;
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362
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363 i = backtrace_pcinfo (state, addrs[0], callback_one, error_callback_one,
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364 &bdata);
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365 if (i != 0)
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366 {
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367 fprintf (stderr,
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368 ("test4: unexpected return value "
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369 "from backtrace_pcinfo %d\n"),
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370 i);
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371 bdata.failed = 1;
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372 }
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373
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374 check ("test4", 0, all, f3line, "f33", "btest.c", &bdata.failed);
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375 check ("test4", 1, all, f2line, "f32", "btest.c", &bdata.failed);
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376 check ("test4", 2, all, f1line, "test4", "btest.c", &bdata.failed);
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377
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378 if (bdata.failed)
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379 data.failed = 1;
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380 }
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381
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382 printf ("%s: backtrace_simple inline\n", data.failed ? "FAIL" : "PASS");
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383
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384 if (data.failed)
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385 ++failures;
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386
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387 return failures;
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388 }
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389
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390 static int test5 (void) __attribute__ ((unused));
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391
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392 int global = 1;
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393
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394 static int
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395 test5 (void)
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396 {
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397 struct symdata symdata;
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398 int i;
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399 uintptr_t addr = (uintptr_t) &global;
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400
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401 if (sizeof (global) > 1)
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402 addr += 1;
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403
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404 symdata.name = NULL;
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405 symdata.val = 0;
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406 symdata.size = 0;
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407 symdata.failed = 0;
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408
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409 i = backtrace_syminfo (state, addr, callback_three,
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410 error_callback_three, &symdata);
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411 if (i == 0)
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412 {
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413 fprintf (stderr,
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414 "test5: unexpected return value from backtrace_syminfo %d\n",
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415 i);
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416 symdata.failed = 1;
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417 }
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418
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419 if (!symdata.failed)
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420 {
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421 if (symdata.name == NULL)
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422 {
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423 fprintf (stderr, "test5: NULL syminfo name\n");
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424 symdata.failed = 1;
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425 }
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145
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426 else if (!(strncmp (symdata.name, "global", 6) == 0
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427 && (symdata.name[6] == '\0'|| symdata.name[6] == '.')))
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111
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428 {
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429 fprintf (stderr,
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430 "test5: unexpected syminfo name got %s expected %s\n",
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431 symdata.name, "global");
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432 symdata.failed = 1;
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433 }
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434 else if (symdata.val != (uintptr_t) &global)
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435 {
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436 fprintf (stderr,
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437 "test5: unexpected syminfo value got %lx expected %lx\n",
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438 (unsigned long) symdata.val,
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439 (unsigned long) (uintptr_t) &global);
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440 symdata.failed = 1;
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441 }
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442 else if (symdata.size != sizeof (global))
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443 {
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444 fprintf (stderr,
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445 "test5: unexpected syminfo size got %lx expected %lx\n",
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446 (unsigned long) symdata.size,
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447 (unsigned long) sizeof (global));
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448 symdata.failed = 1;
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449 }
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450 }
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451
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452 printf ("%s: backtrace_syminfo variable\n",
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453 symdata.failed ? "FAIL" : "PASS");
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454
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455 if (symdata.failed)
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456 ++failures;
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457
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458 return failures;
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459 }
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460
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131
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461 /* Check that are no files left open. */
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462
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463 static void
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464 check_open_files (void)
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465 {
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466 int i;
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467
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468 for (i = 3; i < 10; i++)
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469 {
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470 if (close (i) == 0)
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471 {
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472 fprintf (stderr,
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473 "ERROR: descriptor %d still open after tests complete\n",
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|
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474 i);
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475 ++failures;
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476 }
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477 }
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478 }
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479
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111
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480 /* Run all the tests. */
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481
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482 int
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483 main (int argc ATTRIBUTE_UNUSED, char **argv)
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484 {
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485 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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486 error_callback_create, NULL);
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487
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488 #if BACKTRACE_SUPPORTED
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489 test1 ();
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490 test2 ();
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491 test3 ();
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492 test4 ();
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493 #if BACKTRACE_SUPPORTS_DATA
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494 test5 ();
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|
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495 #endif
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496 #endif
|
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497
|
|
131
|
498 check_open_files ();
|
|
|
499
|
|
111
|
500 exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
|
|
|
501 }
|
