1 | /* |
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2 | * Test suite for xmalloc and family. |
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3 | * |
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4 | * Copyright 2008 Board of Trustees, Leland Stanford Jr. University |
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5 | * Copyright 2004, 2005, 2006 |
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6 | * by Internet Systems Consortium, Inc. ("ISC") |
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7 | * Copyright 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
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8 | * 2003 by The Internet Software Consortium and Rich Salz |
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9 | * |
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10 | * See LICENSE for licensing terms. |
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11 | */ |
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12 | |
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13 | #line 1 "xmalloc.c" |
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14 | |
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15 | #include <config.h> |
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16 | #include <portable/system.h> |
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17 | |
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18 | #include <ctype.h> |
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19 | #include <errno.h> |
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20 | #include <sys/time.h> |
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21 | |
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22 | /* Linux requires sys/time.h be included before sys/resource.h. */ |
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23 | #include <sys/resource.h> |
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24 | |
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25 | #include <util/util.h> |
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26 | |
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27 | |
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28 | /* |
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29 | * A customized error handler for checking xmalloc's support of them. Prints |
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30 | * out the error message and exits with status 1. |
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31 | */ |
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32 | static void |
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33 | test_handler(const char *function, size_t size, const char *file, int line) |
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34 | { |
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35 | die("%s %lu %s %d", function, (unsigned long) size, file, line); |
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36 | } |
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37 | |
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38 | |
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39 | /* |
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40 | * Allocate the amount of memory given and write to all of it to make sure we |
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41 | * can, returning true if that succeeded and false on any sort of detectable |
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42 | * error. |
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43 | */ |
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44 | static int |
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45 | test_malloc(size_t size) |
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46 | { |
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47 | char *buffer; |
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48 | size_t i; |
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49 | |
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50 | buffer = xmalloc(size); |
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51 | if (buffer == NULL) |
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52 | return 0; |
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53 | if (size > 0) |
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54 | memset(buffer, 1, size); |
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55 | for (i = 0; i < size; i++) |
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56 | if (buffer[i] != 1) |
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57 | return 0; |
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58 | free(buffer); |
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59 | return 1; |
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60 | } |
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61 | |
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62 | |
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63 | /* |
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64 | * Allocate half the memory given, write to it, then reallocate to the desired |
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65 | * size, writing to the rest and then checking it all. Returns true on |
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66 | * success, false on any failure. |
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67 | */ |
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68 | static int |
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69 | test_realloc(size_t size) |
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70 | { |
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71 | char *buffer; |
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72 | size_t i; |
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73 | |
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74 | buffer = xmalloc(10); |
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75 | if (buffer == NULL) |
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76 | return 0; |
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77 | memset(buffer, 1, 10); |
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78 | buffer = xrealloc(buffer, size); |
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79 | if (buffer == NULL) |
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80 | return 0; |
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81 | if (size > 0) |
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82 | memset(buffer + 10, 2, size - 10); |
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83 | for (i = 0; i < 10; i++) |
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84 | if (buffer[i] != 1) |
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85 | return 0; |
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86 | for (i = 10; i < size; i++) |
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87 | if (buffer[i] != 2) |
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88 | return 0; |
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89 | free(buffer); |
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90 | return 1; |
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91 | } |
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92 | |
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93 | |
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94 | /* |
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95 | * Generate a string of the size indicated, call xstrdup on it, and then |
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96 | * ensure the result matches. Returns true on success, false on any failure. |
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97 | */ |
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98 | static int |
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99 | test_strdup(size_t size) |
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100 | { |
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101 | char *string, *copy; |
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102 | int match; |
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103 | |
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104 | string = xmalloc(size); |
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105 | if (string == NULL) |
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106 | return 0; |
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107 | memset(string, 1, size - 1); |
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108 | string[size - 1] = '\0'; |
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109 | copy = xstrdup(string); |
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110 | if (copy == NULL) |
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111 | return 0; |
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112 | match = strcmp(string, copy); |
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113 | free(string); |
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114 | free(copy); |
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115 | return (match == 0); |
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116 | } |
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117 | |
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118 | |
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119 | /* |
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120 | * Generate a string of the size indicated plus some, call xstrndup on it, and |
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121 | * then ensure the result matches. Returns true on success, false on any |
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122 | * failure. |
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123 | */ |
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124 | static int |
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125 | test_strndup(size_t size) |
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126 | { |
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127 | char *string, *copy; |
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128 | int match, toomuch; |
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129 | |
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130 | string = xmalloc(size + 1); |
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131 | if (string == NULL) |
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132 | return 0; |
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133 | memset(string, 1, size - 1); |
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134 | string[size - 1] = 2; |
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135 | string[size] = '\0'; |
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136 | copy = xstrndup(string, size - 1); |
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137 | if (copy == NULL) |
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138 | return 0; |
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139 | match = strncmp(string, copy, size - 1); |
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140 | toomuch = strcmp(string, copy); |
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141 | free(string); |
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142 | free(copy); |
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143 | return (match == 0 && toomuch != 0); |
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144 | } |
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145 | |
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146 | |
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147 | /* |
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148 | * Allocate the amount of memory given and check that it's all zeroed, |
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149 | * returning true if that succeeded and false on any sort of detectable error. |
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150 | */ |
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151 | static int |
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152 | test_calloc(size_t size) |
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153 | { |
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154 | char *buffer; |
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155 | size_t i, nelems; |
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156 | |
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157 | nelems = size / 4; |
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158 | if (nelems * 4 != size) |
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159 | return 0; |
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160 | buffer = xcalloc(nelems, 4); |
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161 | if (buffer == NULL) |
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162 | return 0; |
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163 | for (i = 0; i < size; i++) |
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164 | if (buffer[i] != 0) |
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165 | return 0; |
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166 | free(buffer); |
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167 | return 1; |
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168 | } |
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169 | |
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170 | |
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171 | /* |
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172 | * Test asprintf with a large string (essentially using it as strdup). |
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173 | * Returns true if successful, false otherwise. |
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174 | */ |
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175 | static int |
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176 | test_asprintf(size_t size) |
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177 | { |
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178 | char *copy, *string; |
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179 | int status; |
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180 | size_t i; |
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181 | |
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182 | string = xmalloc(size); |
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183 | memset(string, 42, size - 1); |
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184 | string[size - 1] = '\0'; |
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185 | status = xasprintf(©, "%s", string); |
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186 | free(string); |
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187 | for (i = 0; i < size - 1; i++) |
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188 | if (copy[i] != 42) |
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189 | return 0; |
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190 | if (copy[size - 1] != '\0') |
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191 | return 0; |
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192 | free(copy); |
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193 | return 1; |
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194 | } |
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195 | |
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196 | |
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197 | /* Wrapper around vasprintf to do the va_list stuff. */ |
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198 | static int |
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199 | xvasprintf_wrapper(char **strp, const char *format, ...) |
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200 | { |
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201 | va_list args; |
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202 | int status; |
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203 | |
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204 | va_start(args, format); |
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205 | status = xvasprintf(strp, format, args); |
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206 | va_end(args); |
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207 | return status; |
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208 | } |
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209 | |
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210 | |
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211 | /* |
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212 | * Test vasprintf with a large string (essentially using it as strdup). |
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213 | * Returns true if successful, false otherwise. |
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214 | */ |
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215 | static int |
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216 | test_vasprintf(size_t size) |
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217 | { |
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218 | char *copy, *string; |
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219 | int status; |
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220 | size_t i; |
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221 | |
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222 | string = xmalloc(size); |
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223 | memset(string, 42, size - 1); |
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224 | string[size - 1] = '\0'; |
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225 | status = xvasprintf_wrapper(©, "%s", string); |
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226 | free(string); |
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227 | for (i = 0; i < size - 1; i++) |
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228 | if (copy[i] != 42) |
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229 | return 0; |
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230 | if (copy[size - 1] != '\0') |
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231 | return 0; |
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232 | free(copy); |
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233 | return 1; |
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234 | } |
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235 | |
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236 | |
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237 | /* |
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238 | * Take the amount of memory to allocate in bytes as a command-line argument |
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239 | * and call test_malloc with that amount of memory. |
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240 | */ |
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241 | int |
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242 | main(int argc, char *argv[]) |
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243 | { |
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244 | size_t size, max; |
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245 | size_t limit = 0; |
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246 | int willfail = 0; |
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247 | unsigned char code; |
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248 | struct rlimit rl; |
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249 | void *tmp; |
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250 | |
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251 | if (argc < 3) |
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252 | die("Usage error. Type, size, and limit must be given."); |
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253 | errno = 0; |
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254 | size = strtol(argv[2], 0, 10); |
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255 | if (size == 0 && errno != 0) |
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256 | sysdie("Invalid size"); |
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257 | errno = 0; |
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258 | limit = strtol(argv[3], 0, 10); |
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259 | if (limit == 0 && errno != 0) |
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260 | sysdie("Invalid limit"); |
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261 | |
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262 | /* If the code is capitalized, install our customized error handler. */ |
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263 | code = argv[1][0]; |
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264 | if (isupper(code)) { |
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265 | xmalloc_error_handler = test_handler; |
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266 | code = tolower(code); |
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267 | } |
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268 | |
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269 | /* |
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270 | * Decide if the allocation should fail. If it should, set willfail to 2, |
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271 | * so that if it unexpectedly succeeds, we exit with a status indicating |
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272 | * that the test should be skipped. |
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273 | */ |
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274 | max = size; |
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275 | if (code == 's' || code == 'n' || code == 'a' || code == 'v') { |
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276 | max += size; |
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277 | if (limit > 0) |
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278 | limit += size; |
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279 | } |
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280 | if (limit > 0 && max > limit) |
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281 | willfail = 2; |
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282 | |
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283 | /* |
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284 | * If a memory limit was given and we can set memory limits, set it. |
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285 | * Otherwise, exit 2, signalling to the driver that the test should be |
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286 | * skipped. We do this here rather than in the driver due to some |
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287 | * pathological problems with Linux (setting ulimit in the shell caused |
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288 | * the shell to die). |
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289 | */ |
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290 | if (limit > 0) { |
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291 | #if HAVE_SETRLIMIT && defined(RLIMIT_AS) |
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292 | rl.rlim_cur = limit; |
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293 | rl.rlim_max = limit; |
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294 | if (setrlimit(RLIMIT_AS, &rl) < 0) { |
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295 | syswarn("Can't set data limit to %lu", (unsigned long) limit); |
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296 | exit(2); |
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297 | } |
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298 | if (size < limit || code == 'r') { |
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299 | tmp = malloc(code == 'r' ? 10 : size); |
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300 | if (tmp == NULL) { |
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301 | syswarn("Can't allocate initial memory of %lu", |
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302 | (unsigned long) size); |
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303 | exit(2); |
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304 | } |
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305 | free(tmp); |
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306 | } |
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307 | #else |
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308 | warn("Data limits aren't supported."); |
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309 | exit(2); |
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310 | #endif |
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311 | } |
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312 | |
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313 | switch (code) { |
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314 | case 'c': exit(test_calloc(size) ? willfail : 1); |
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315 | case 'm': exit(test_malloc(size) ? willfail : 1); |
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316 | case 'r': exit(test_realloc(size) ? willfail : 1); |
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317 | case 's': exit(test_strdup(size) ? willfail : 1); |
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318 | case 'n': exit(test_strndup(size) ? willfail : 1); |
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319 | case 'a': exit(test_asprintf(size) ? willfail : 1); |
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320 | case 'v': exit(test_vasprintf(size) ? willfail : 1); |
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321 | default: |
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322 | die("Unknown mode %c", argv[1][0]); |
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323 | break; |
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324 | } |
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325 | exit(1); |
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326 | } |
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