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111
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1 Consider compiling test.c, with this content:
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2 VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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3 #include "test.h"
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4
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5 int
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6 main (int argc, char **argv)
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7 {
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8 int a = PLUS (1,2);
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9 int b = PLUS (3,4);
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10 return 0;
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11 }
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12 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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13
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14 ...where test.h has this content:
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15 VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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16 extern int foo ();
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17
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18 #define PLUS(A, B) A + B
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19 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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20
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21
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22 The undocumented -fdump-internal-locations option outputs this information
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23 to stderr, showing what each source_location value means. Source code
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24 lines are quoted, showing both per-line source_location values and
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25 per-line&column source_location values (written vertically under the
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26 corresponding character of source code).
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27
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28 VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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29 RESERVED LOCATIONS
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30 source_location interval: 0 <= loc < 2
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31
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32 ORDINARY MAP: 0
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33 source_location interval: 32 <= loc < 64
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34 file: test.c
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35 starting at line: 1
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36 column bits: 12
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37 range bits: 5
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38 test.c: 1|loc: 32|#include "test.h"
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39 |69269258258148147
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40 |46802468024680246
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41
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42 ORDINARY MAP: 1
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43 source_location interval: 64 <= loc < 96
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44 file: <built-in>
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45 starting at line: 0
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46 column bits: 0
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47 range bits: 0
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48
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49 ORDINARY MAP: 2
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50 source_location interval: 96 <= loc < 128
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51 file: <command-line>
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52 starting at line: 0
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53 column bits: 0
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54 range bits: 0
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55
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56 ORDINARY MAP: 3
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57 source_location interval: 128 <= loc < 160128
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58 file: /usr/include/stdc-predef.h
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59 starting at line: 1
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60 column bits: 12
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61 range bits: 5
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62 (contents of /usr/include/stdc-predef.h snipped for brevity)
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63
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64 ORDINARY MAP: 4
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65 source_location interval: 160128 <= loc < 160160
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66 file: <command-line>
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67 starting at line: 32
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68 column bits: 12
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69 range bits: 5
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70
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71 ORDINARY MAP: 5
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72 source_location interval: 160160 <= loc < 164256
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73 file: test.c
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74 starting at line: 1
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75 column bits: 12
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76 range bits: 5
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77 test.c: 1|loc:160160|#include "test.h"
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78 |00000000000000000
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79 |12223334445556667
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80 |92582581481470470
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81 |24680246802468024
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82
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83 ORDINARY MAP: 6
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84 source_location interval: 164256 <= loc < 173280
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85 file: test.h
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86 starting at line: 1
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87 column bits: 12
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88 range bits: 5
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89 test.h: 1|loc:164256|extern int foo ();
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90 |444444444444444444
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91 |233344455566677788
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92 |825814814704703603
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93 |802468024680246802
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94 test.h: 2|loc:168352|
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95 |
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96 |
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97 |
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98 |
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99 test.h: 3|loc:172448|#define PLUS(A, B) A + B
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100 |222222222222222223333333
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101 |455566677788889990001112
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102 |814704703603692692582581
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103 |024680246802468024680246
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104
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105 ORDINARY MAP: 7
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106 source_location interval: 173280 <= loc < 202016
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107 file: test.c
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108 starting at line: 2
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109 column bits: 12
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110 range bits: 5
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111 test.c: 2|loc:173280|
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112 |
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113 |
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114 |
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115 |
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116 test.c: 3|loc:177376|int
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117 |777
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118 |444
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119 |047
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120 |802
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121 test.c: 4|loc:181472|main (int argc, char **argv)
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122 |1111111111111111222222222222
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123 |5556666777888999000111222333
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124 |0360369269258258148147047036
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125 |4680246802468024680246802468
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126 test.c: 5|loc:185568|{
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127 |5
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128 |6
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129 |0
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130 |0
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131 test.c: 6|loc:189664| int a = PLUS (1,2);
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132 |999999999900000000000
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133 |677788899900011122233
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134 |926925825814814704703
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135 |680246802468024680246
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136 test.c: 7|loc:193760| int b = PLUS (3,4);
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137 |333333344444444444444
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138 |788899900011122233344
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139 |925825814814704703603
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140 |246802468024680246802
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141 test.c: 8|loc:197856| return 0;
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142 |77778888888
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143 |89990001112
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144 |82581481470
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145 |80246802468
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146 test.c: 9|loc:201952|}
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147 |1
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148 |9
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149 |8
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150 |4
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151
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152 UNALLOCATED LOCATIONS
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153 source_location interval: 202016 <= loc < 2147483633
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154
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155 MACRO 1: PLUS (7 tokens)
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156 source_location interval: 2147483633 <= loc < 2147483640
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157 test.c:7:11: note: expansion point is location 194115
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158 int b = PLUS (3,4);
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159 ^~~~
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160
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161 map->start_location: 2147483633
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162 macro_locations:
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163 0: 194304, 173088
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164 test.c:7:17: note: token 0 has x-location == 194304
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165 int b = PLUS (3,4);
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166 ^
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167
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168 test.c:7:17: note: token 0 has y-location == 173088
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169 1: 173152, 173152
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170 In file included from test.c:1:0:
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171 test.h:3:22: note: token 1 has x-location == y-location == 173152
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172 #define PLUS(A, B) A + B
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173 ^
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174
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175 2: 194368, 173216
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176 test.c:7:19: note: token 2 has x-location == 194368
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177 int b = PLUS (3,4);
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178 ^
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179
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180 test.c:7:19: note: token 2 has y-location == 173216
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181 3: 0, 2947526575
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182 cc1: note: token 3 has x-location == 0
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183 cc1: note: token 3 has y-location == 2947526575
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184 4: 2947526575, 2947526575
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185 x-location == y-location == 2947526575 encodes token # 800042942
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186 5: 2947526575, 2947526575
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187 x-location == y-location == 2947526575 encodes token # 800042942
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188 6: 2947526575, 2947526575
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189 x-location == y-location == 2947526575 encodes token # 800042942
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190
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191 MACRO 0: PLUS (7 tokens)
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192 source_location interval: 2147483640 <= loc < 2147483647
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193 test.c:6:11: note: expansion point is location 190019
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194 int a = PLUS (1,2);
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195 ^~~~
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196
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197 map->start_location: 2147483640
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198 macro_locations:
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199 0: 190208, 173088
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200 test.c:6:17: note: token 0 has x-location == 190208
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201 int a = PLUS (1,2);
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202 ^
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203
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204 test.c:6:17: note: token 0 has y-location == 173088
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205 1: 173152, 173152
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206 In file included from test.c:1:0:
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207 test.h:3:22: note: token 1 has x-location == y-location == 173152
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208 #define PLUS(A, B) A + B
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209 ^
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210
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211 2: 190272, 173216
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212 test.c:6:19: note: token 2 has x-location == 190272
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213 int a = PLUS (1,2);
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214 ^
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215
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216 test.c:6:19: note: token 2 has y-location == 173216
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217 3: 0, 2947526575
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218 cc1: note: token 3 has x-location == 0
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219 cc1: note: token 3 has y-location == 2947526575
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220 4: 2947526575, 2947526575
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221 x-location == y-location == 2947526575 encodes token # 800042935
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222 5: 2947526575, 2947526575
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223 x-location == y-location == 2947526575 encodes token # 800042935
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224 6: 2947526575, 2947526575
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225 x-location == y-location == 2947526575 encodes token # 800042935
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226
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227 MAX_SOURCE_LOCATION
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228 source_location interval: 2147483647 <= loc < 2147483648
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229
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230 AD-HOC LOCATIONS
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231 source_location interval: 2147483648 <= loc < 4294967295
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232 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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