1 | #include "exception.h" |
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2 | |
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3 | // Use: gcc -fexceptions -Wall -Werror -g exception.c test-main.c |
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4 | |
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5 | #include <stdio.h> |
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6 | #include <stdbool.h> |
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7 | |
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8 | // Helps with manual translation. It may or may not get folded into the |
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9 | // header, that depends on how it interacts with concurancy. |
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10 | void __try_resume_node_new(struct __try_resume_node * node, |
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11 | _Bool (*handler)(exception except)) { |
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12 | node->next = shared_stack.top_resume; |
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13 | shared_stack.top_resume = node; |
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14 | node->try_to_handle = handler; |
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15 | } |
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16 | |
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17 | // Local Print On Exit: |
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18 | struct raii_base_type { |
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19 | const char * area; |
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20 | }; |
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21 | |
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22 | void raii_dtor(struct raii_base_type * this) { |
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23 | printf("Exiting: %s\n", this->area); |
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24 | } |
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25 | |
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26 | #define raii_t __attribute__((cleanup(raii_dtor))) struct raii_base_type |
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27 | |
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28 | // =========================================================================== |
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29 | // Runtime code (post-translation). |
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30 | void terminate(int except_value) { |
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31 | raii_t a = {"terminate function"}; |
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32 | __throw_terminate(except_value); |
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33 | printf("terminate returned\n"); |
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34 | } |
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35 | |
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36 | void resume(int except_value) { |
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37 | raii_t a = {"resume function"}; |
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38 | __throw_resume(except_value); |
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39 | printf("resume returned\n"); |
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40 | } |
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41 | |
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42 | // Termination Test: Two handlers: no catch, catch |
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43 | void bar() { |
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44 | raii_t a = {"bar function"}; |
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45 | { |
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46 | void bar_try1() { |
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47 | terminate(4); |
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48 | } |
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49 | void bar_catch1(int index, exception except) { |
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50 | switch(except) { |
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51 | case 1: |
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52 | printf("bar caught exception 3.\n"); |
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53 | break; |
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54 | default: |
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55 | printf("INVALID INDEX in bar: %d (%d)\n", index, except); |
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56 | } |
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57 | } |
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58 | int bar_match1(exception except) { |
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59 | if (3 == except) { |
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60 | return 1; |
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61 | } else { |
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62 | return 0; |
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63 | } |
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64 | } |
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65 | __try_terminate(bar_try1, bar_catch1, bar_match1); |
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66 | } |
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67 | } |
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68 | |
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69 | void foo() { |
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70 | raii_t a = {"foo function"}; |
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71 | { |
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72 | void foo_try1() { |
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73 | bar(); |
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74 | } |
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75 | void foo_catch1(int index, exception except) { |
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76 | switch(index) { |
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77 | case 1: |
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78 | printf("foo caught exception 4.\n"); |
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79 | break; |
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80 | case 2: |
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81 | printf("foo caught exception 2.\n"); |
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82 | break; |
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83 | default: |
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84 | printf("INVALID INDEX in foo: %d (%d)\n", index, except); |
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85 | } |
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86 | } |
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87 | int foo_match1(exception except) { |
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88 | if (4 == except) { |
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89 | return 1; |
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90 | } else if (2 == except) { |
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91 | return 2; |
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92 | } else { |
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93 | return 0; |
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94 | } |
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95 | } |
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96 | __try_terminate(foo_try1, foo_catch1, foo_match1); |
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97 | } |
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98 | } |
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99 | |
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100 | // Resumption Two Handler Test: no catch, catch. |
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101 | void beta() { |
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102 | raii_t a = {"beta function"}; |
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103 | { |
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104 | bool beta_handle1(exception except) { |
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105 | if (3 == except) { |
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106 | printf("beta caught exception 3\n"); |
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107 | return true; |
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108 | } else { |
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109 | return false; |
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110 | } |
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111 | } |
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112 | struct __try_resume_node node |
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113 | __attribute__((cleanup(__try_resume_cleanup))); |
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114 | __try_resume_node_new(&node, beta_handle1); |
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115 | { |
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116 | resume(4); |
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117 | } |
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118 | } |
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119 | } |
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120 | void alpha() { |
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121 | raii_t a = {"alpha function"}; |
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122 | { |
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123 | bool alpha_handle1(exception except) { |
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124 | if (2 == except) { |
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125 | printf("alpha caught exception 2\n"); |
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126 | return true; |
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127 | } else if (4 == except) { |
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128 | printf("alpha caught exception 4\n"); |
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129 | return true; |
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130 | } else { |
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131 | return false; |
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132 | } |
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133 | } |
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134 | struct __try_resume_node node |
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135 | __attribute__((cleanup(__try_resume_cleanup))); |
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136 | __try_resume_node_new(&node, alpha_handle1); |
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137 | { |
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138 | beta(); |
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139 | } |
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140 | } |
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141 | } |
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142 | |
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143 | // Finally Test: |
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144 | void farewell() { |
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145 | { |
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146 | void farewell_finally1() { |
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147 | printf("See you next time\n"); |
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148 | } |
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149 | struct __cleanup_hook __hidden_hook |
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150 | __attribute__((cleanup(farewell_finally1))); |
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151 | { |
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152 | printf("walk out of farewell\n"); |
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153 | } |
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154 | } |
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155 | } |
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156 | |
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157 | // Resume-to-Terminate Test: |
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158 | void fallback() { |
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159 | { |
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160 | void fallback_try1() { |
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161 | resume(1); |
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162 | } |
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163 | void fallback_catch1(int index, exception except) { |
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164 | switch (index) { |
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165 | case 1: |
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166 | printf("fallback caught termination 1\n"); |
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167 | break; |
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168 | default: |
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169 | printf("INVALID INDEX in fallback: %d (%d)\n", index, except); |
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170 | } |
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171 | } |
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172 | int fallback_match1(exception except) { |
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173 | if (1 == except) { |
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174 | return 1; |
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175 | } else { |
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176 | return 0; |
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177 | } |
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178 | } |
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179 | __try_terminate(fallback_try1, fallback_catch1, fallback_match1); |
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180 | } |
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181 | } |
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182 | |
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183 | // Terminate Throw New Exception: |
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184 | void terminate_swap() { |
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185 | raii_t a = {"terminate_swap"}; |
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186 | { |
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187 | void fn_try1() { |
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188 | terminate(2); |
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189 | } |
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190 | void fn_catch1(int index, exception except) { |
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191 | switch (index) { |
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192 | case 1: |
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193 | terminate(1); |
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194 | break; |
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195 | default: |
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196 | printf("INVALID INDEX in terminate_swap: %d (%d)\n", |
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197 | index, except); |
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198 | } |
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199 | } |
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200 | int fn_match1(exception except) { |
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201 | if (2 == except) { |
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202 | return 1; |
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203 | } else { |
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204 | return 0; |
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205 | } |
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206 | } |
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207 | __try_terminate(fn_try1, fn_catch1, fn_match1); |
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208 | } |
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209 | } |
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210 | |
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211 | void terminate_swapped() { |
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212 | raii_t a = {"terminate_swapped"}; |
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213 | { |
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214 | void fn_try1() { |
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215 | terminate_swap(); |
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216 | } |
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217 | void fn_catch1(int index, exception except) { |
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218 | switch (index) { |
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219 | case 1: |
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220 | printf("terminate_swapped caught exception 1\n"); |
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221 | break; |
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222 | default: |
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223 | printf("INVALID INDEX in terminate_swapped: %d (%d)\n", |
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224 | index, except); |
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225 | } |
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226 | } |
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227 | int fn_match1(exception except) { |
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228 | if (1 == except) { |
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229 | return 1; |
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230 | } else { |
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231 | return 0; |
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232 | } |
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233 | } |
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234 | __try_terminate(fn_try1, fn_catch1, fn_match1); |
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235 | } |
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236 | } |
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237 | |
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238 | // Resume Throw New Exception: |
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239 | void resume_swap() { |
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240 | raii_t a = {"terminate_swap"}; |
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241 | { |
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242 | bool fn_handle1(exception except) { |
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243 | if (2 == except) { |
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244 | resume(1); |
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245 | return true; |
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246 | } else { |
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247 | return false; |
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248 | } |
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249 | } |
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250 | struct __try_resume_node node |
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251 | __attribute__((cleanup(__try_resume_cleanup))); |
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252 | __try_resume_node_new(&node, fn_handle1); |
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253 | { |
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254 | resume(2); |
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255 | } |
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256 | } |
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257 | } |
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258 | |
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259 | void resume_swapped() { |
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260 | { |
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261 | bool fn_handle1(exception except) { |
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262 | if (1 == except) { |
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263 | printf("resume_swapped caught exception 1\n"); |
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264 | return true; |
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265 | } else { |
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266 | return false; |
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267 | } |
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268 | } |
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269 | struct __try_resume_node node |
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270 | __attribute__((cleanup(__try_resume_cleanup))); |
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271 | __try_resume_node_new(&node, fn_handle1); |
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272 | { |
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273 | resume_swap(); |
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274 | } |
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275 | } |
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276 | } |
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277 | |
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278 | // Terminate Rethrow: |
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279 | // I don't have an implementation for this. |
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280 | void reterminate() { |
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281 | { |
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282 | void fn_try1() { |
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283 | void fn_try2() { |
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284 | terminate(1); |
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285 | } |
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286 | void fn_catch2(int index, exception except) { |
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287 | switch (index) { |
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288 | case 1: |
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289 | printf("reterminate 2 caught and " |
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290 | "will rethrow exception 1\n"); |
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291 | __rethrow_terminate(); |
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292 | break; |
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293 | default: |
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294 | printf("INVALID INDEX in reterminate 2: %d (%d)\n", |
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295 | index, except); |
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296 | } |
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297 | } |
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298 | int fn_match2(exception except) { |
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299 | if (1 == except) { |
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300 | return 1; |
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301 | } else { |
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302 | return 0; |
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303 | } |
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304 | } |
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305 | __try_terminate(fn_try2, fn_catch2, fn_match2); |
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306 | } |
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307 | void fn_catch1(int index, exception except) { |
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308 | switch (index) { |
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309 | case 1: |
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310 | printf("reterminate 1 caught exception 1\n"); |
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311 | break; |
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312 | default: |
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313 | printf("INVALID INDEX in reterminate 1: %d (%d)\n", |
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314 | index, except); |
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315 | } |
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316 | } |
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317 | int fn_match1(exception except) { |
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318 | if (1 == except) { |
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319 | return 1; |
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320 | } else { |
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321 | return 0; |
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322 | } |
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323 | } |
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324 | __try_terminate(fn_try1, fn_catch1, fn_match1); |
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325 | } |
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326 | } |
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327 | |
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328 | // Resume Rethrow: |
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329 | void reresume() { |
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330 | { |
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331 | bool reresume_handle1(exception except) { |
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332 | if (1 == except) { |
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333 | printf("reresume 1 caught exception 1\n"); |
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334 | return true; |
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335 | } else { |
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336 | return false; |
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337 | } |
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338 | } |
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339 | struct __try_resume_node node |
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340 | __attribute__((cleanup(__try_resume_cleanup))); |
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341 | __try_resume_node_new(&node, reresume_handle1); |
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342 | { |
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343 | bool reresume_handle2(exception except) { |
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344 | if (1 == except) { |
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345 | printf("reresume 2 caught and rethrows exception 1\n"); |
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346 | return false; |
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347 | } else { |
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348 | return false; |
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349 | } |
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350 | } |
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351 | struct __try_resume_node node |
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352 | __attribute__((cleanup(__try_resume_cleanup))); |
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353 | __try_resume_node_new(&node, reresume_handle2); |
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354 | { |
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355 | resume(1); |
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356 | } |
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357 | } |
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358 | } |
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359 | } |
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360 | |
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361 | // Terminate-Resume interaction: |
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362 | void fum() { |
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363 | // terminate block, call resume |
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364 | { |
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365 | void fum_try1() { |
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366 | resume(3); |
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367 | } |
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368 | void fum_catch1(int index, exception except) { |
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369 | switch (index) { |
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370 | case 1: |
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371 | printf("fum caught exception 3\n"); |
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372 | break; |
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373 | default: |
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374 | printf("INVALID INDEX in fum: %d (%d)\n", index, except); |
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375 | } |
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376 | } |
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377 | int fum_match1(exception except) { |
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378 | if (3 == except) { |
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379 | return 1; |
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380 | } else { |
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381 | return 0; |
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382 | } |
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383 | } |
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384 | __try_terminate(fum_try1, fum_catch1, fum_match1); |
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385 | } |
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386 | } |
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387 | |
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388 | void foe() { |
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389 | // resume block, call terminate |
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390 | { |
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391 | bool foe_handle1(exception except) { |
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392 | if (3 == except) { |
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393 | printf("foe caught exception 3\n"); |
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394 | return true; |
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395 | } else { |
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396 | return false; |
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397 | } |
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398 | } |
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399 | struct __try_resume_node node |
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400 | __attribute__((cleanup(__try_resume_cleanup))); |
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401 | __try_resume_node_new(&node, foe_handle1); |
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402 | { |
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403 | terminate(3); |
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404 | } |
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405 | } |
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406 | } |
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407 | |
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408 | void fy() { |
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409 | // terminate block calls fum, call foe |
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410 | { |
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411 | void fy_try1() { |
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412 | foe(); |
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413 | } |
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414 | void fy_catch1(int index, exception except) { |
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415 | switch (index) { |
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416 | case 1: |
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417 | printf("fy caught exception 3\n"); |
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418 | fum(); |
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419 | break; |
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420 | default: |
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421 | printf("INVALID INDEX in fy: %d (%d)\n", index, except); |
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422 | } |
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423 | } |
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424 | int fy_match1(exception except) { |
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425 | if (3 == except) { |
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426 | return 1; |
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427 | } else { |
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428 | return 0; |
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429 | } |
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430 | } |
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431 | __try_terminate(fy_try1, fy_catch1, fy_match1); |
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432 | } |
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433 | } |
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434 | |
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435 | void fee() { |
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436 | // resume block, call fy |
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437 | { |
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438 | bool fee_handle1(exception except) { |
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439 | if (3 == except) { |
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440 | printf("fee caught exception 3\n"); |
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441 | return true; |
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442 | } else { |
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443 | return false; |
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444 | } |
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445 | } |
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446 | struct __try_resume_node node |
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447 | __attribute__((cleanup(__try_resume_cleanup))); |
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448 | __try_resume_node_new(&node, fee_handle1); |
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449 | { |
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450 | fy(); |
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451 | } |
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452 | } |
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453 | } |
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454 | |
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455 | |
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456 | // main: choose which tests to run |
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457 | int main(int argc, char * argv[]) { |
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458 | raii_t a = {"main function"}; |
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459 | |
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460 | foo(); printf("\n"); |
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461 | alpha(); printf("\n"); |
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462 | farewell(); printf("\n"); |
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463 | fallback(); printf("\n"); |
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464 | terminate_swapped(); printf("\n"); |
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465 | resume_swapped(); printf("\n"); |
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466 | reterminate(); printf("\n"); |
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467 | reresume(); printf("\n"); |
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468 | fee(); printf("\n"); |
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469 | // Uncaught termination test. |
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470 | terminate(7); |
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471 | } |
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