1 | // ================================================================ // |
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2 | // // |
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3 | // File : arb_msg.cxx // |
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4 | // Purpose : // |
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5 | // // |
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6 | // Coded by Ralf Westram (coder@reallysoft.de) in November 2010 // |
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7 | // Institute of Microbiology (Technical University Munich) // |
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8 | // http://www.arb-home.de/ // |
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9 | // // |
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10 | // ================================================================ // |
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11 | |
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12 | #include <arb_msg_fwd.h> |
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13 | #include <arb_assert.h> |
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14 | #include <arb_string.h> |
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15 | #include <arb_backtrace.h> |
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16 | #include <smartptr.h> |
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17 | #include <arb_handlers.h> |
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18 | |
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19 | // AISC_MKPT_PROMOTE:#ifndef _GLIBCXX_CSTDLIB |
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20 | // AISC_MKPT_PROMOTE:#include <cstdlib> |
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21 | // AISC_MKPT_PROMOTE:#endif |
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22 | // AISC_MKPT_PROMOTE:#ifndef ARB_CORE_H |
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23 | // AISC_MKPT_PROMOTE:#include "arb_core.h" |
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24 | // AISC_MKPT_PROMOTE:#endif |
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25 | // AISC_MKPT_PROMOTE: |
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26 | // AISC_MKPT_PROMOTE:// return error and ensure none is exported |
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27 | // AISC_MKPT_PROMOTE:#define RETURN_ERROR(err) arb_assert(!GB_have_error()); return (err) |
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28 | // AISC_MKPT_PROMOTE: |
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29 | |
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30 | #if defined(DEBUG) |
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31 | #if defined(DEVEL_RALF) |
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32 | // #define TRACE_BUFFER_USAGE |
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33 | #endif // DEBUG |
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34 | #endif // DEVEL_RALF |
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35 | |
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36 | #define GLOBAL_STRING_BUFFERS 4 |
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37 | |
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38 | static size_t last_global_string_size = 0; |
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39 | #define GBS_GLOBAL_STRING_SIZE 64000 |
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40 | |
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41 | // -------------------------------------------------------------------------------- |
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42 | |
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43 | #ifdef LINUX |
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44 | # define HAVE_VSNPRINTF |
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45 | #endif |
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46 | |
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47 | #ifdef HAVE_VSNPRINTF |
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48 | # define PRINT2BUFFER(buffer, bufsize, templat, parg) vsnprintf(buffer, bufsize, templat, parg) |
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49 | #else |
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50 | # define PRINT2BUFFER(buffer, bufsize, templat, parg) vsprintf(buffer, templat, parg) |
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51 | #endif |
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52 | |
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53 | #define PRINT2BUFFER_CHECKED(printed, buffer, bufsize, templat, parg) \ |
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54 | (printed) = PRINT2BUFFER(buffer, bufsize, templat, parg); \ |
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55 | if ((printed) < 0 || (size_t)(printed) >= (bufsize)) { \ |
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56 | GBK_terminatef("Internal buffer overflow (size=%zu, used=%i)\n", \ |
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57 | (bufsize), (printed)); \ |
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58 | } |
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59 | |
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60 | // -------------------------------------------------------------------------------- |
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61 | |
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62 | __ATTR__VFORMAT(1) static const char *gbs_vglobal_string(const char *templat, va_list parg, int allow_reuse) { |
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63 | static char buffer[GLOBAL_STRING_BUFFERS][GBS_GLOBAL_STRING_SIZE+2]; // several buffers - used alternately |
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64 | static int idx = 0; |
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65 | static char lifetime[GLOBAL_STRING_BUFFERS] = {}; |
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66 | static char nextIdx[GLOBAL_STRING_BUFFERS] = {}; |
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67 | |
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68 | int my_idx; |
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69 | int psize; |
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70 | |
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71 | if (nextIdx[0] == 0) { // initialize nextIdx |
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72 | for (my_idx = 0; my_idx<GLOBAL_STRING_BUFFERS; my_idx++) { |
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73 | nextIdx[my_idx] = (my_idx+1)%GLOBAL_STRING_BUFFERS; |
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74 | } |
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75 | } |
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76 | |
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77 | if (allow_reuse == -1) { // called from GBS_reuse_buffer |
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78 | // buffer to reuse is passed in 'templat' |
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79 | |
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80 | for (my_idx = 0; my_idx<GLOBAL_STRING_BUFFERS; my_idx++) { |
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81 | if (buffer[my_idx] == templat) { |
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82 | lifetime[my_idx] = 0; |
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83 | #if defined(TRACE_BUFFER_USAGE) |
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84 | printf("Reusing buffer #%i\n", my_idx); |
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85 | #endif // TRACE_BUFFER_USAGE |
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86 | if (nextIdx[my_idx] == idx) idx = my_idx; |
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87 | return 0; |
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88 | } |
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89 | #if defined(TRACE_BUFFER_USAGE) |
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90 | else { |
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91 | printf("(buffer to reuse is not buffer #%i (%p))\n", my_idx, buffer[my_idx]); |
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92 | } |
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93 | #endif // TRACE_BUFFER_USAGE |
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94 | } |
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95 | for (my_idx = 0; my_idx<GLOBAL_STRING_BUFFERS; my_idx++) { |
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96 | printf("buffer[%i]=%p\n", my_idx, buffer[my_idx]); |
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97 | } |
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98 | arb_assert(0); // GBS_reuse_buffer called with illegal buffer |
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99 | return 0; |
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100 | } |
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101 | |
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102 | if (lifetime[idx] == 0) { |
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103 | my_idx = idx; |
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104 | } |
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105 | else { |
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106 | for (my_idx = nextIdx[idx]; lifetime[my_idx]>0; my_idx = nextIdx[my_idx]) { |
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107 | #if defined(TRACE_BUFFER_USAGE) |
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108 | printf("decreasing lifetime[%i] (%i->%i)\n", my_idx, lifetime[my_idx], lifetime[my_idx]-1); |
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109 | #endif // TRACE_BUFFER_USAGE |
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110 | lifetime[my_idx]--; |
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111 | } |
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112 | } |
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113 | |
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114 | PRINT2BUFFER_CHECKED(psize, buffer[my_idx], (size_t)GBS_GLOBAL_STRING_SIZE, templat, parg); |
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115 | |
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116 | #if defined(TRACE_BUFFER_USAGE) |
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117 | printf("Printed into global buffer #%i ('%s')\n", my_idx, buffer[my_idx]); |
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118 | #endif // TRACE_BUFFER_USAGE |
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119 | |
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120 | last_global_string_size = psize; |
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121 | |
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122 | if (!allow_reuse) { |
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123 | idx = my_idx; |
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124 | lifetime[idx] = 1; |
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125 | } |
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126 | #if defined(TRACE_BUFFER_USAGE) |
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127 | else { |
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128 | printf("Allow reuse of buffer #%i\n", my_idx); |
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129 | } |
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130 | #endif // TRACE_BUFFER_USAGE |
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131 | |
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132 | return buffer[my_idx]; |
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133 | } |
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134 | |
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135 | const char *GBS_vglobal_string(const char *templat, va_list parg) { |
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136 | // goes to header: __ATTR__VFORMAT(1) |
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137 | return gbs_vglobal_string(templat, parg, 0); |
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138 | } |
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139 | |
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140 | char *GBS_vglobal_string_copy(const char *templat, va_list parg) { |
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141 | // goes to header: __ATTR__VFORMAT(1) |
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142 | const char *gstr = gbs_vglobal_string(templat, parg, 1); |
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143 | return GB_strduplen(gstr, last_global_string_size); |
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144 | } |
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145 | |
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146 | const char *GBS_global_string_to_buffer(char *buffer, size_t bufsize, const char *templat, ...) { |
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147 | // goes to header: __ATTR__FORMAT(3) |
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148 | |
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149 | #if defined(WARN_TODO) |
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150 | #warning search for '\b(sprintf)\b\s*\(' and replace by GBS_global_string_to_buffer |
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151 | #endif |
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152 | |
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153 | va_list parg; |
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154 | int psize; |
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155 | |
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156 | arb_assert(buffer); |
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157 | va_start(parg, templat); |
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158 | PRINT2BUFFER_CHECKED(psize, buffer, bufsize, templat, parg); |
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159 | va_end(parg); |
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160 | |
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161 | return buffer; |
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162 | } |
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163 | |
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164 | char *GBS_global_string_copy(const char *templat, ...) { |
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165 | // goes to header: __ATTR__FORMAT(1) |
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166 | va_list parg; |
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167 | va_start(parg, templat); |
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168 | char *result = GBS_vglobal_string_copy(templat, parg); |
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169 | va_end(parg); |
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170 | return result; |
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171 | } |
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172 | |
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173 | const char *GBS_global_string(const char *templat, ...) { |
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174 | // goes to header: __ATTR__FORMAT(1) |
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175 | va_list parg; |
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176 | va_start(parg, templat); |
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177 | const char *result = gbs_vglobal_string(templat, parg, 0); |
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178 | va_end(parg); |
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179 | return result; |
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180 | } |
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181 | |
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182 | const char *GBS_static_string(const char *str) { |
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183 | return GBS_global_string("%s", str); |
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184 | } |
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185 | |
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186 | GB_ERROR GBK_assert_msg(const char *assertion, const char *file, int linenr) { |
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187 | #define BUFSIZE 1000 |
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188 | static char *buffer = 0; |
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189 | const char *result = 0; |
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190 | int old_size = last_global_string_size; |
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191 | |
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192 | if (!buffer) buffer = (char *)malloc(BUFSIZE); |
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193 | result = GBS_global_string_to_buffer(buffer, BUFSIZE, "assertion '%s' failed in %s #%i", assertion, file, linenr); |
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194 | |
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195 | last_global_string_size = old_size; |
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196 | |
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197 | return result; |
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198 | #undef BUFSIZE |
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199 | } |
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200 | |
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201 | // ------------------------- |
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202 | // Error "handling" |
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203 | |
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204 | |
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205 | #if defined(WARN_TODO) |
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206 | #warning redesign GB_export_error et al |
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207 | /* To clearly distinguish between the two ways of error handling |
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208 | * (which are: return GB_ERROR |
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209 | * and: export the error) |
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210 | * |
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211 | * GB_export_error() shall only export, not return the error message. |
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212 | * if only used for formatting GBS_global_string shall be used |
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213 | * (most cases where GB_export_errorf is used are candidates for this. |
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214 | * GB_export_error was generally misused for this, before |
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215 | * GBS_global_string was added!) |
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216 | * |
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217 | * GB_export_IO_error() shall not export and be renamed into GB_IO_error() |
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218 | * |
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219 | * GB_export_error() shall fail if there is already an exported error |
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220 | * (maybe always remember a stack trace of last error export (try whether copy of backtrace-array works)) |
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221 | * |
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222 | * use GB_get_error() to import AND clear the error |
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223 | */ |
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224 | #endif |
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225 | |
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226 | static char *GB_error_buffer = 0; |
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227 | |
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228 | GB_ERROR GB_export_error(const char *error) { // just a temp hack around format-warnings |
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229 | return GB_export_errorf("%s", error); |
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230 | } |
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231 | |
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232 | GB_ERROR GB_export_errorf(const char *templat, ...) { |
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233 | /* goes to header: |
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234 | * __ATTR__FORMAT(1) |
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235 | * __ATTR__DEPRECATED_LATER("use GB_export_error(GBS_global_string(...))") |
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236 | * because it's misused (where GBS_global_string should be used) |
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237 | * old functionality will remain available via 'GB_export_error(GBS_global_string(...))' |
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238 | */ |
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239 | |
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240 | char buffer[GBS_GLOBAL_STRING_SIZE]; |
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241 | char *p = buffer; |
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242 | va_list parg; |
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243 | |
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244 | #if defined(WARN_TODO) |
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245 | #warning dont prepend ARB ERROR here |
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246 | #endif |
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247 | |
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248 | p += sprintf(buffer, "ARB ERROR: "); |
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249 | va_start(parg, templat); |
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250 | |
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251 | vsprintf(p, templat, parg); |
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252 | |
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253 | freedup(GB_error_buffer, buffer); |
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254 | return GB_error_buffer; |
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255 | } |
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256 | |
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257 | #if defined(WARN_TODO) |
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258 | #warning replace GB_export_IO_error() by GB_IO_error() and then export it if really needed |
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259 | #endif |
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260 | |
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261 | GB_ERROR GB_IO_error(const char *action, const char *filename) { |
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262 | /*! creates error message from current 'errno' |
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263 | * @param action may be NULL (otherwise it should contain sth like "writing" or "deleting") |
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264 | * @param filename may be NULL (otherwise it should contain the filename, the IO-Error occurred for) |
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265 | * @return error message (in static buffer) |
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266 | */ |
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267 | |
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268 | GB_ERROR io_error; |
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269 | if (errno) { |
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270 | io_error = strerror(errno); |
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271 | } |
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272 | else { |
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273 | arb_assert(0); // unhandled error (which is NOT an IO-Error) |
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274 | io_error = |
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275 | "Some unhandled error occurred, but it was not an IO-Error. " |
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276 | "Please send detailed information about how the error occurred to devel@arb-home.de " |
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277 | "or ignore this error (if possible)."; |
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278 | } |
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279 | |
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280 | GB_ERROR error; |
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281 | if (action) { |
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282 | if (filename) error = GBS_global_string("While %s '%s': %s", action, filename, io_error); |
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283 | else error = GBS_global_string("While %s <unknown file>: %s", action, io_error); |
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284 | } |
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285 | else { |
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286 | if (filename) error = GBS_global_string("Concerning '%s': %s", filename, io_error); |
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287 | else error = io_error; |
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288 | } |
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289 | |
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290 | return error; |
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291 | } |
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292 | |
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293 | GB_ERROR GB_export_IO_error(const char *action, const char *filename) { |
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294 | // goes to header: __ATTR__DEPRECATED_TODO("use GB_export_error(GB_IO_error(...))") |
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295 | return GB_export_error(GB_IO_error(action, filename)); |
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296 | } |
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297 | |
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298 | #if defined(WARN_TODO) |
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299 | #warning reactivate deprecations below |
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300 | #endif |
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301 | |
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302 | |
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303 | GB_ERROR GB_print_error() { |
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304 | // goes to header: __ATTR__DEPRECATED_TODO("will be removed completely") |
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305 | if (GB_error_buffer) { |
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306 | fflush(stdout); |
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307 | fprintf(stderr, "%s\n", GB_error_buffer); |
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308 | } |
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309 | return GB_error_buffer; |
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310 | } |
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311 | |
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312 | GB_ERROR GB_get_error() { |
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313 | // goes to header: __ATTR__DEPRECATED_TODO("consider using either GB_have_error() or GB_await_error()") |
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314 | return GB_error_buffer; |
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315 | } |
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316 | |
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317 | bool GB_have_error() { |
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318 | return GB_error_buffer != 0; |
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319 | } |
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320 | |
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321 | GB_ERROR GB_await_error() { |
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322 | if (GB_error_buffer) { |
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323 | static SmartCharPtr err; |
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324 | err = GB_error_buffer; |
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325 | GB_error_buffer = NULL; |
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326 | return &*err; |
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327 | } |
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328 | arb_assert(0); // please correct error handling |
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329 | |
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330 | return "Program logic error: Something went wrong, but reason is unknown"; |
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331 | } |
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332 | |
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333 | void GB_clear_error() { // clears the error buffer |
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334 | freenull(GB_error_buffer); |
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335 | } |
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336 | |
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337 | #if defined(WARN_TODO) |
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338 | #warning search for 'GBS_global_string.*error' and replace with GB_failedTo_error or GB_append_exportedError |
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339 | #endif |
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340 | GB_ERROR GB_failedTo_error(const char *do_something, const char *special, GB_ERROR error) { |
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341 | if (error) { |
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342 | if (special) { |
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343 | error = GBS_global_string("Failed to %s '%s'.\n(Reason: %s)", do_something, special, error); |
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344 | } |
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345 | else { |
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346 | error = GBS_global_string("Failed to %s.\n(Reason: %s)", do_something, error); |
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347 | } |
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348 | } |
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349 | return error; |
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350 | } |
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351 | |
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352 | GB_ERROR GB_append_exportedError(GB_ERROR error) { |
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353 | // If an error has been exported, it gets appended as reason to given 'error'. |
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354 | // If error is NULL, the exported error is returned (if any) |
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355 | // |
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356 | // This is e.g. useful if you search for SOMETHING in the DB w/o success (i.e. get NULL as result). |
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357 | // In that case you can't be sure, whether SOMETHING just does not exist or whether it was not |
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358 | // found because some other error occurred. |
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359 | |
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360 | if (GB_have_error()) { |
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361 | if (error) return GBS_global_string("%s (Reason: %s)", error, GB_await_error()); |
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362 | return GB_await_error(); |
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363 | } |
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364 | return error; |
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365 | } |
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366 | |
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367 | // --------------------- |
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368 | // Backtracing |
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369 | |
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370 | class BackTraceInfo *GBK_get_backtrace(size_t skipFramesAtBottom) { // only used ifdef TRACE_ALLOCS |
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371 | return new BackTraceInfo(skipFramesAtBottom); |
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372 | } |
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373 | void GBK_dump_former_backtrace(class BackTraceInfo *trace, FILE *out, const char *message) { // only used ifdef TRACE_ALLOCS |
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374 | demangle_backtrace(*trace, out, message); |
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375 | } |
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376 | |
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377 | void GBK_free_backtrace(class BackTraceInfo *trace) { // only used ifdef TRACE_ALLOCS |
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378 | delete trace; |
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379 | } |
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380 | |
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381 | void GBK_dump_backtrace(FILE *out, const char *message) { |
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382 | demangle_backtrace(BackTraceInfo(1), out ? out : stderr, message); |
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383 | } |
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384 | |
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385 | // ------------------------------------------- |
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386 | // Error/notification functions |
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387 | |
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388 | void GB_internal_error(const char *message) { |
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389 | /* Use GB_internal_error, when something goes badly wrong |
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390 | * but you want to give the user a chance to save his database |
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391 | * |
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392 | * Note: it's NOT recommended to use this function! |
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393 | */ |
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394 | |
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395 | char *full_message = GBS_global_string_copy("Internal ARB Error: %s", message); |
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396 | active_arb_handlers->show_error(full_message); |
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397 | active_arb_handlers->show_error("ARB is most likely unstable now (due to this error).\n" |
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398 | "If you've made changes to the database, consider to save it using a different name.\n" |
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399 | "Try to fix the cause of the error and restart ARB."); |
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400 | |
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401 | #ifdef ASSERTION_USED |
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402 | fputs(full_message, stderr); |
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403 | arb_assert(0); // internal errors shall not happen, go fix it |
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404 | #else |
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405 | GBK_dump_backtrace(stderr, full_message); |
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406 | #endif |
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407 | |
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408 | free(full_message); |
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409 | } |
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410 | |
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411 | void GB_internal_errorf(const char *templat, ...) { |
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412 | // goes to header: __ATTR__FORMAT(1) |
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413 | FORWARD_FORMATTED_NORETURN(GB_internal_error, templat); |
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414 | } |
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415 | |
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416 | void GBK_terminate(const char *error) { // goes to header __ATTR__NORETURN |
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417 | /* GBK_terminate is the emergency exit! |
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418 | * only used if no other way to recover |
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419 | */ |
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420 | |
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421 | fprintf(stderr, "Error: '%s'\n", error); |
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422 | fputs("Can't continue - terminating..\n", stderr); |
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423 | GBK_dump_backtrace(stderr, "GBK_terminate (reason above) "); |
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424 | |
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425 | fflush(stderr); |
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426 | ARB_SIGSEGV(0); // GBK_terminate shall not be called, fix reason for call (this will crash in RELEASE version) |
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427 | exit(ARB_CRASH_CODE(0)); // should not be reached..just ensure ARB really terminates if somebody changes ARB_SIGSEGV |
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428 | } |
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429 | |
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430 | void GBK_terminatef(const char *templat, ...) { |
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431 | // goes to header: __ATTR__FORMAT(1) __ATTR__NORETURN |
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432 | FORWARD_FORMATTED_NORETURN(GBK_terminate, templat); |
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433 | } |
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434 | |
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435 | // AISC_MKPT_PROMOTE:inline void GBK_terminate_on_error(const char *error) { if (error) GBK_terminatef("Fatal error: %s", error); } |
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436 | |
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437 | void GB_warning(const char *message) { |
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438 | /* If program uses GUI, the message is printed via aw_message, otherwise it goes to stdout |
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439 | * see also : GB_information |
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440 | */ |
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441 | active_arb_handlers->show_warning(message); |
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442 | } |
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443 | void GB_warningf(const char *templat, ...) { |
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444 | // goes to header: __ATTR__FORMAT(1) |
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445 | FORWARD_FORMATTED(GB_warning, templat); |
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446 | } |
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447 | |
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448 | void GB_information(const char *message) { |
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449 | /* this message is always printed to stdout (regardless whether program uses GUI or not) |
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450 | * (if it is not redirected using ARB_redirect_handlers_to) |
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451 | * see also : GB_warning |
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452 | */ |
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453 | active_arb_handlers->show_message(message); |
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454 | } |
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455 | void GB_informationf(const char *templat, ...) { |
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456 | // goes to header: __ATTR__FORMAT(1) |
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457 | FORWARD_FORMATTED(GB_information, templat); |
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458 | } |
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459 | |
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460 | |
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461 | #pragma GCC diagnostic ignored "-Wmissing-format-attribute" |
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462 | |
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463 | void GBS_reuse_buffer(const char *global_buffer) { |
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464 | // If you've just shortely used a buffer, you can put it back here |
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465 | va_list empty; |
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466 | gbs_vglobal_string(global_buffer, empty, -1); // omg hax |
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467 | } |
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468 | |
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469 | #if defined(WARN_TODO) |
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470 | #warning search for '\b(system)\b\s*\(' and use GBK_system instead |
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471 | #endif |
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472 | GB_ERROR GBK_system(const char *system_command) { |
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473 | // goes to header: __ATTR__USERESULT |
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474 | fflush(stdout); |
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475 | fprintf(stderr, "[Action: '%s']\n", system_command); fflush(stderr); |
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476 | |
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477 | int res = system(system_command); |
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478 | |
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479 | fflush(stdout); |
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480 | fflush(stderr); |
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481 | |
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482 | GB_ERROR error = NULL; |
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483 | if (res) { |
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484 | if (res == -1) { |
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485 | error = GB_IO_error("forking", system_command); |
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486 | error = GBS_global_string("System call failed (Reason: %s)", error); |
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487 | } |
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488 | else { |
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489 | error = GBS_global_string("System call failed (result=%i)", res); |
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490 | } |
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491 | |
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492 | error = GBS_global_string("%s\n" |
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493 | "System call was '%s'%s", |
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494 | error, system_command, |
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495 | res == -1 ? "" : "\n(Note: console window may contain additional information)"); |
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496 | } |
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497 | return error; |
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498 | } |
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499 | |
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