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111
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1 /* btest.c -- Test for libbacktrace library
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2 Copyright (C) 2012-2017 Free Software Foundation, Inc.
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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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40
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41 #include "filenames.h"
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42
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43 #include "backtrace.h"
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44 #include "backtrace-supported.h"
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45
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46 #include "testlib.h"
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47
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48 /* Test the backtrace function with non-inlined functions. */
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49
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50 static int test1 (void) __attribute__ ((noinline, unused));
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51 static int f2 (int) __attribute__ ((noinline));
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52 static int f3 (int, int) __attribute__ ((noinline));
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53
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54 static int
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55 test1 (void)
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56 {
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57 /* Returning a value here and elsewhere avoids a tailcall which
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58 would mess up the backtrace. */
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59 return f2 (__LINE__) + 1;
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60 }
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61
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62 static int
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63 f2 (int f1line)
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64 {
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65 return f3 (f1line, __LINE__) + 2;
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66 }
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67
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68 static int
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69 f3 (int f1line, int f2line)
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70 {
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71 struct info all[20];
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72 struct bdata data;
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73 int f3line;
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74 int i;
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75
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76 data.all = &all[0];
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77 data.index = 0;
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78 data.max = 20;
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79 data.failed = 0;
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80
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81 f3line = __LINE__ + 1;
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82 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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83
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84 if (i != 0)
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85 {
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86 fprintf (stderr, "test1: unexpected return value %d\n", i);
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87 data.failed = 1;
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88 }
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89
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90 if (data.index < 3)
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91 {
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92 fprintf (stderr,
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93 "test1: not enough frames; got %zu, expected at least 3\n",
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94 data.index);
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95 data.failed = 1;
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96 }
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97
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98 check ("test1", 0, all, f3line, "f3", "btest.c", &data.failed);
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99 check ("test1", 1, all, f2line, "f2", "btest.c", &data.failed);
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100 check ("test1", 2, all, f1line, "test1", "btest.c", &data.failed);
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101
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102 printf ("%s: backtrace_full noinline\n", data.failed ? "FAIL" : "PASS");
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103
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104 if (data.failed)
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105 ++failures;
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106
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107 return failures;
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108 }
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109
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110 /* Test the backtrace function with inlined functions. */
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111
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112 static inline int test2 (void) __attribute__ ((always_inline, unused));
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113 static inline int f12 (int) __attribute__ ((always_inline));
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114 static inline int f13 (int, int) __attribute__ ((always_inline));
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115
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116 static inline int
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117 test2 (void)
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118 {
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119 return f12 (__LINE__) + 1;
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120 }
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121
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122 static inline int
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123 f12 (int f1line)
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124 {
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125 return f13 (f1line, __LINE__) + 2;
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126 }
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127
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128 static inline int
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129 f13 (int f1line, int f2line)
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130 {
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131 struct info all[20];
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132 struct bdata data;
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133 int f3line;
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134 int i;
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135
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136 data.all = &all[0];
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137 data.index = 0;
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138 data.max = 20;
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139 data.failed = 0;
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140
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141 f3line = __LINE__ + 1;
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142 i = backtrace_full (state, 0, callback_one, error_callback_one, &data);
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143
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144 if (i != 0)
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145 {
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146 fprintf (stderr, "test2: unexpected return value %d\n", i);
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147 data.failed = 1;
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148 }
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149
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150 check ("test2", 0, all, f3line, "f13", "btest.c", &data.failed);
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151 check ("test2", 1, all, f2line, "f12", "btest.c", &data.failed);
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152 check ("test2", 2, all, f1line, "test2", "btest.c", &data.failed);
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153
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154 printf ("%s: backtrace_full inline\n", data.failed ? "FAIL" : "PASS");
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155
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156 if (data.failed)
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157 ++failures;
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158
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159 return failures;
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160 }
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161
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162 /* Test the backtrace_simple function with non-inlined functions. */
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163
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164 static int test3 (void) __attribute__ ((noinline, unused));
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165 static int f22 (int) __attribute__ ((noinline));
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166 static int f23 (int, int) __attribute__ ((noinline));
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167
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168 static int
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169 test3 (void)
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170 {
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171 return f22 (__LINE__) + 1;
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172 }
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173
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174 static int
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175 f22 (int f1line)
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176 {
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177 return f23 (f1line, __LINE__) + 2;
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178 }
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179
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180 static int
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181 f23 (int f1line, int f2line)
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182 {
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183 uintptr_t addrs[20];
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184 struct sdata data;
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185 int f3line;
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186 int i;
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187
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188 data.addrs = &addrs[0];
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189 data.index = 0;
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190 data.max = 20;
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191 data.failed = 0;
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192
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193 f3line = __LINE__ + 1;
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194 i = backtrace_simple (state, 0, callback_two, error_callback_two, &data);
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195
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196 if (i != 0)
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197 {
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198 fprintf (stderr, "test3: unexpected return value %d\n", i);
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199 data.failed = 1;
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200 }
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201
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202 if (!data.failed)
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203 {
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204 struct info all[20];
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205 struct bdata bdata;
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206 int j;
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207
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208 bdata.all = &all[0];
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209 bdata.index = 0;
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210 bdata.max = 20;
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211 bdata.failed = 0;
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212
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213 for (j = 0; j < 3; ++j)
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214 {
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215 i = backtrace_pcinfo (state, addrs[j], callback_one,
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216 error_callback_one, &bdata);
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217 if (i != 0)
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218 {
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219 fprintf (stderr,
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220 ("test3: unexpected return value "
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221 "from backtrace_pcinfo %d\n"),
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222 i);
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223 bdata.failed = 1;
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224 }
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225 if (!bdata.failed && bdata.index != (size_t) (j + 1))
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226 {
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227 fprintf (stderr,
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228 ("wrong number of calls from backtrace_pcinfo "
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229 "got %u expected %d\n"),
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230 (unsigned int) bdata.index, j + 1);
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231 bdata.failed = 1;
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232 }
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233 }
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234
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235 check ("test3", 0, all, f3line, "f23", "btest.c", &bdata.failed);
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236 check ("test3", 1, all, f2line, "f22", "btest.c", &bdata.failed);
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237 check ("test3", 2, all, f1line, "test3", "btest.c", &bdata.failed);
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238
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239 if (bdata.failed)
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240 data.failed = 1;
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241
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242 for (j = 0; j < 3; ++j)
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243 {
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244 struct symdata symdata;
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245
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246 symdata.name = NULL;
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247 symdata.val = 0;
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248 symdata.size = 0;
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249 symdata.failed = 0;
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250
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251 i = backtrace_syminfo (state, addrs[j], callback_three,
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252 error_callback_three, &symdata);
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253 if (i == 0)
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254 {
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255 fprintf (stderr,
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256 ("test3: [%d]: unexpected return value "
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257 "from backtrace_syminfo %d\n"),
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258 j, i);
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259 symdata.failed = 1;
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260 }
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261
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262 if (!symdata.failed)
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263 {
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264 const char *expected;
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265
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266 switch (j)
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267 {
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268 case 0:
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269 expected = "f23";
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270 break;
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271 case 1:
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272 expected = "f22";
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273 break;
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274 case 2:
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275 expected = "test3";
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276 break;
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277 default:
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278 assert (0);
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279 }
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280
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281 if (symdata.name == NULL)
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282 {
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283 fprintf (stderr, "test3: [%d]: NULL syminfo name\n", j);
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284 symdata.failed = 1;
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285 }
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286 /* Use strncmp, not strcmp, because GCC might create a
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287 clone. */
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288 else if (strncmp (symdata.name, expected, strlen (expected))
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289 != 0)
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290 {
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291 fprintf (stderr,
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292 ("test3: [%d]: unexpected syminfo name "
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293 "got %s expected %s\n"),
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294 j, symdata.name, expected);
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295 symdata.failed = 1;
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296 }
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297 }
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298
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299 if (symdata.failed)
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300 data.failed = 1;
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301 }
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302 }
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303
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304 printf ("%s: backtrace_simple noinline\n", data.failed ? "FAIL" : "PASS");
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305
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306 if (data.failed)
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307 ++failures;
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308
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309 return failures;
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310 }
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311
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312 /* Test the backtrace_simple function with inlined functions. */
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313
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314 static inline int test4 (void) __attribute__ ((always_inline, unused));
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315 static inline int f32 (int) __attribute__ ((always_inline));
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316 static inline int f33 (int, int) __attribute__ ((always_inline));
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317
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318 static inline int
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319 test4 (void)
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320 {
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321 return f32 (__LINE__) + 1;
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322 }
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323
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324 static inline int
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325 f32 (int f1line)
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326 {
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327 return f33 (f1line, __LINE__) + 2;
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328 }
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329
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330 static inline int
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331 f33 (int f1line, int f2line)
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332 {
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333 uintptr_t addrs[20];
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334 struct sdata data;
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335 int f3line;
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336 int i;
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337
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338 data.addrs = &addrs[0];
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339 data.index = 0;
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340 data.max = 20;
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341 data.failed = 0;
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342
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343 f3line = __LINE__ + 1;
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344 i = backtrace_simple (state, 0, callback_two, error_callback_two, &data);
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345
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346 if (i != 0)
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347 {
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348 fprintf (stderr, "test3: unexpected return value %d\n", i);
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349 data.failed = 1;
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350 }
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351
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352 if (!data.failed)
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353 {
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354 struct info all[20];
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355 struct bdata bdata;
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356
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357 bdata.all = &all[0];
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358 bdata.index = 0;
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359 bdata.max = 20;
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360 bdata.failed = 0;
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361
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362 i = backtrace_pcinfo (state, addrs[0], callback_one, error_callback_one,
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363 &bdata);
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364 if (i != 0)
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365 {
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366 fprintf (stderr,
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367 ("test4: unexpected return value "
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368 "from backtrace_pcinfo %d\n"),
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369 i);
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370 bdata.failed = 1;
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371 }
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372
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373 check ("test4", 0, all, f3line, "f33", "btest.c", &bdata.failed);
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374 check ("test4", 1, all, f2line, "f32", "btest.c", &bdata.failed);
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375 check ("test4", 2, all, f1line, "test4", "btest.c", &bdata.failed);
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376
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377 if (bdata.failed)
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378 data.failed = 1;
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379 }
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380
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381 printf ("%s: backtrace_simple inline\n", data.failed ? "FAIL" : "PASS");
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382
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383 if (data.failed)
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384 ++failures;
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385
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386 return failures;
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387 }
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388
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389 static int test5 (void) __attribute__ ((unused));
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390
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391 int global = 1;
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392
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393 static int
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394 test5 (void)
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395 {
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396 struct symdata symdata;
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397 int i;
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398 uintptr_t addr = (uintptr_t) &global;
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399
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400 if (sizeof (global) > 1)
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401 addr += 1;
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402
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403 symdata.name = NULL;
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404 symdata.val = 0;
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405 symdata.size = 0;
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406 symdata.failed = 0;
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407
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408 i = backtrace_syminfo (state, addr, callback_three,
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409 error_callback_three, &symdata);
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410 if (i == 0)
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411 {
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412 fprintf (stderr,
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413 "test5: unexpected return value from backtrace_syminfo %d\n",
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414 i);
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415 symdata.failed = 1;
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416 }
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417
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418 if (!symdata.failed)
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419 {
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420 if (symdata.name == NULL)
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421 {
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422 fprintf (stderr, "test5: NULL syminfo name\n");
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423 symdata.failed = 1;
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424 }
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425 else if (strcmp (symdata.name, "global") != 0)
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426 {
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427 fprintf (stderr,
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428 "test5: unexpected syminfo name got %s expected %s\n",
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429 symdata.name, "global");
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430 symdata.failed = 1;
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431 }
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432 else if (symdata.val != (uintptr_t) &global)
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433 {
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434 fprintf (stderr,
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435 "test5: unexpected syminfo value got %lx expected %lx\n",
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436 (unsigned long) symdata.val,
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437 (unsigned long) (uintptr_t) &global);
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438 symdata.failed = 1;
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439 }
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440 else if (symdata.size != sizeof (global))
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441 {
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442 fprintf (stderr,
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443 "test5: unexpected syminfo size got %lx expected %lx\n",
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444 (unsigned long) symdata.size,
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445 (unsigned long) sizeof (global));
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446 symdata.failed = 1;
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447 }
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448 }
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449
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450 printf ("%s: backtrace_syminfo variable\n",
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451 symdata.failed ? "FAIL" : "PASS");
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452
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453 if (symdata.failed)
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454 ++failures;
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455
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456 return failures;
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457 }
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458
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459 /* Run all the tests. */
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460
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461 int
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462 main (int argc ATTRIBUTE_UNUSED, char **argv)
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463 {
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464 state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
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465 error_callback_create, NULL);
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466
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467 #if BACKTRACE_SUPPORTED
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468 test1 ();
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469 test2 ();
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470 test3 ();
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471 test4 ();
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472 #if BACKTRACE_SUPPORTS_DATA
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473 test5 ();
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474 #endif
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475 #endif
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476
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477 exit (failures ? EXIT_FAILURE : EXIT_SUCCESS);
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478 }
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