Sun, 22 Dec 2024 22:14:57 +0100
implement all string to number conversions that are just wrappers
issue #532
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are 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 the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include "util_allocator.h" |
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30 | #include "cx/test.h" |
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31 | |
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32 | #if !defined(__clang__) && __GNUC__ > 11 |
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33 | // this utility is explicitly designed to track UAF |
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34 | #pragma GCC diagnostic ignored "-Wuse-after-free" |
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35 | #endif |
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36 | |
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37 | static void cx_testing_allocator_track(CxTestingAllocator *alloc, void *ptr) { |
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38 | for (size_t i = 0; i < alloc->tracked_count; i++) { |
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39 | if (alloc->tracked[i] == ptr) return; // is already tracked |
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40 | } |
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41 | |
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42 | if (alloc->tracked_count == alloc->tracked_capacity) { |
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43 | size_t newcapa = alloc->tracked_capacity + 64; |
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44 | void *newarr = realloc(alloc->tracked, newcapa * sizeof(void *)); |
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45 | if (newarr == NULL) abort(); |
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46 | alloc->tracked = newarr; |
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47 | alloc->tracked_capacity = newcapa; |
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48 | } |
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49 | |
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50 | alloc->tracked[alloc->tracked_count] = ptr; |
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51 | alloc->tracked_count++; |
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52 | } |
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53 | |
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54 | static bool cx_testing_allocator_untrack(CxTestingAllocator *alloc, void *ptr) { |
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55 | for (size_t i = 0; i < alloc->tracked_count; i++) { |
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56 | if (alloc->tracked[i] == ptr) { |
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57 | size_t last = alloc->tracked_count - 1; |
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58 | if (i < last) { |
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59 | alloc->tracked[i] = alloc->tracked[last]; |
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60 | } |
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61 | alloc->tracked_count--; |
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62 | return true; |
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63 | } |
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64 | } |
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65 | return false; |
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66 | } |
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67 | |
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68 | static void *cx_malloc_testing(void *d, size_t n) { |
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69 | CxTestingAllocator *data = d; |
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70 | void *ptr = malloc(n); |
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71 | data->alloc_total++; |
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72 | if (ptr == NULL) { |
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73 | data->alloc_failed++; |
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74 | } else { |
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75 | cx_testing_allocator_track(data, ptr); |
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76 | } |
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77 | return ptr; |
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78 | } |
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79 | |
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80 | static void *cx_realloc_testing(void *d, void *mem, size_t n) { |
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81 | CxTestingAllocator *data = d; |
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82 | void *ptr = realloc(mem, n); |
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83 | if (ptr == mem) { |
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84 | return ptr; |
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85 | } else { |
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86 | data->alloc_total++; |
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87 | if (ptr == NULL) { |
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88 | data->alloc_failed++; |
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89 | } else { |
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90 | data->free_total++; |
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91 | if (!cx_testing_allocator_untrack(data, mem)) { |
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92 | data->free_failed++; |
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93 | } |
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94 | cx_testing_allocator_track(data, ptr); |
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95 | } |
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96 | return ptr; |
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97 | } |
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98 | } |
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99 | |
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100 | static void *cx_calloc_testing(void *d, size_t nelem, size_t n) { |
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101 | CxTestingAllocator *data = d; |
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102 | void *ptr = calloc(nelem, n); |
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103 | data->alloc_total++; |
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104 | if (ptr == NULL) { |
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105 | data->alloc_failed++; |
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106 | } else { |
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107 | cx_testing_allocator_track(data, ptr); |
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108 | } |
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109 | return ptr; |
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110 | } |
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111 | |
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112 | static void cx_free_testing(void *d, void *mem) { |
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113 | CxTestingAllocator *data = d; |
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114 | data->free_total++; |
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115 | if (cx_testing_allocator_untrack(data, mem)) { |
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116 | free(mem); |
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117 | } else { |
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118 | data->free_failed++; |
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119 | // do not even attempt to free mem, because it is likely to segfault |
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120 | } |
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121 | } |
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122 | |
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123 | cx_allocator_class cx_testing_allocator_class = { |
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124 | cx_malloc_testing, |
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125 | cx_realloc_testing, |
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126 | cx_calloc_testing, |
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127 | cx_free_testing |
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128 | }; |
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129 | |
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130 | |
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131 | void cx_testing_allocator_init(CxTestingAllocator *alloc) { |
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132 | alloc->base.cl = &cx_testing_allocator_class; |
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133 | alloc->base.data = alloc; |
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134 | alloc->alloc_failed = 0; |
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135 | alloc->alloc_total = 0; |
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136 | alloc->free_failed = 0; |
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137 | alloc->free_total = 0; |
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138 | size_t initial_capa = 16; |
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139 | alloc->tracked_capacity = initial_capa; |
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140 | alloc->tracked_count = 0; |
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141 | alloc->tracked = calloc(initial_capa, sizeof(void *)); |
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142 | } |
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143 | |
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144 | void cx_testing_allocator_destroy(CxTestingAllocator *alloc) { |
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145 | free(alloc->tracked); |
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146 | } |
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147 | |
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148 | bool cx_testing_allocator_used(const CxTestingAllocator *alloc) { |
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149 | return alloc->alloc_total > 0; |
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150 | } |
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151 | |
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152 | bool cx_testing_allocator_verify(const CxTestingAllocator *alloc) { |
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153 | return alloc->tracked_count == 0 && alloc->alloc_failed == 0 && alloc->free_failed == 0 |
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154 | && alloc->alloc_total == alloc->free_total; |
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155 | } |
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156 | |
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157 | // SELF-TEST |
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158 | |
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159 | CX_TEST(test_util_allocator_expect_free) { |
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160 | CxTestingAllocator talloc; |
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161 | cx_testing_allocator_init(&talloc); |
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162 | CxAllocator *alloc = &talloc.base; |
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163 | CX_TEST_DO { |
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164 | CX_TEST_ASSERTM(cx_testing_allocator_verify(&talloc), |
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165 | "Fresh testing allocator fails to verify."); |
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166 | CX_TEST_ASSERTM(!cx_testing_allocator_used(&talloc), |
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167 | "Fresh testing allocator already used."); |
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168 | void *ptr = cxMalloc(alloc, 16); |
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169 | CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc), |
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170 | "Testing allocator verifies with unfreed memory."); |
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171 | CX_TEST_ASSERT(cx_testing_allocator_used(&talloc)); |
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172 | CX_TEST_ASSERT(ptr != NULL); |
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173 | |
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174 | cxFree(alloc, ptr); |
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175 | CX_TEST_ASSERTM(cx_testing_allocator_verify(&talloc), |
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176 | "Testing allocator fails to verify after everything freed."); |
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177 | } |
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178 | cx_testing_allocator_destroy(&talloc); |
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179 | } |
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180 | |
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181 | CX_TEST(test_util_allocator_detect_double_free) { |
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182 | CxTestingAllocator talloc; |
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183 | cx_testing_allocator_init(&talloc); |
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184 | CxAllocator *alloc = &talloc.base; |
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185 | CX_TEST_DO { |
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186 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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187 | void *ptr = cxMalloc(alloc, 16); |
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188 | CX_TEST_ASSERT(ptr != NULL); |
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189 | cxFree(alloc, ptr); |
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190 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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191 | cxFree(alloc, ptr); |
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192 | CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc), |
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193 | "Testing allocator does not detect double-free."); |
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194 | } |
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195 | cx_testing_allocator_destroy(&talloc); |
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196 | } |
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197 | |
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198 | CX_TEST(test_util_allocator_free_untracked) { |
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199 | CxTestingAllocator talloc; |
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200 | cx_testing_allocator_init(&talloc); |
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201 | CxAllocator *alloc = &talloc.base; |
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202 | void *ptr = malloc(16); |
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203 | CX_TEST_DO { |
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204 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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205 | cxFree(alloc, ptr); |
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206 | CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc), |
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207 | "Testing allocator does not detect free of untracked memory."); |
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208 | } |
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209 | free(ptr); |
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210 | cx_testing_allocator_destroy(&talloc); |
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211 | } |
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212 | |
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213 | CX_TEST(test_util_allocator_full_lifecycle_with_realloc) { |
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214 | CxTestingAllocator talloc; |
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215 | cx_testing_allocator_init(&talloc); |
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216 | CxAllocator *alloc = &talloc.base; |
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217 | CX_TEST_DO { |
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218 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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219 | void *ptr = cxMalloc(alloc, 16); |
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220 | CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc)); |
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221 | CX_TEST_ASSERT(ptr != NULL); |
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222 | CX_TEST_ASSERT(talloc.tracked_count == 1); |
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223 | ptr = cxRealloc(alloc, ptr, 256); |
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224 | CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc)); |
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225 | CX_TEST_ASSERT(ptr != NULL); |
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226 | CX_TEST_ASSERT(talloc.tracked_count == 1); |
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227 | cxFree(alloc, ptr); |
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228 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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229 | } |
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230 | cx_testing_allocator_destroy(&talloc); |
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231 | } |
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232 | |
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233 | CX_TEST(test_util_allocator_calloc_initializes) { |
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234 | CxTestingAllocator talloc; |
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235 | cx_testing_allocator_init(&talloc); |
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236 | CxAllocator *alloc = &talloc.base; |
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237 | CX_TEST_DO { |
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238 | const char zeros[16] = {0}; |
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239 | void *ptr = cxCalloc(alloc, 16, 1); |
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240 | CX_TEST_ASSERT(memcmp(ptr, zeros, 16) == 0); |
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241 | cxFree(alloc, ptr); |
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242 | CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc)); |
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243 | } |
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244 | cx_testing_allocator_destroy(&talloc); |
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245 | } |
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246 | |
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247 | CxTestSuite *cx_test_suite_testing_allocator(void) { |
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248 | CxTestSuite *suite = cx_test_suite_new("testing allocator self-test"); |
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249 | |
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250 | cx_test_register(suite, test_util_allocator_expect_free); |
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251 | cx_test_register(suite, test_util_allocator_detect_double_free); |
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252 | cx_test_register(suite, test_util_allocator_free_untracked); |
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253 | cx_test_register(suite, test_util_allocator_full_lifecycle_with_realloc); |
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254 | cx_test_register(suite, test_util_allocator_calloc_initializes); |
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255 | |
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256 | return suite; |
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257 | } |
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258 |