Mercurial > libpst

annotate src/debug.c @ 275:e02c81c39232

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add some debug code
author Carl Byington <carl@five-ten-sg.com>
date Sun, 22 May 2011 13:16:35 -0700
parents 156cf548c764
children cc8ee701f190
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
1 #include "define.h"
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2
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3
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4 struct pst_debug_func {
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5 char * name;
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6 struct pst_debug_func *next;
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7 };
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8
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9
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10 #define NUM_COL 32
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11 #define MAX_DEPTH 32
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12
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13 static struct pst_debug_func *func_head = NULL;
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14 static int func_depth = 0;
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15 static char indent[MAX_DEPTH*4+1];
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16 static FILE *debug_fp = NULL;
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17 #ifdef HAVE_SEMAPHORE_H
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18 static sem_t* debug_mutex = NULL;
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19 #endif
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20
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21
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22 void pst_debug_lock()
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23 {
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24 #ifdef HAVE_SEMAPHORE_H
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25 if (debug_mutex) sem_wait(debug_mutex);
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26 #endif
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27 }
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30 void pst_debug_unlock()
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31 {
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32 #ifdef HAVE_SEMAPHORE_H
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33 if (debug_mutex) sem_post(debug_mutex);
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34 #endif
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35 }
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38 void pst_debug_init(const char* fname, void* output_mutex) {
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39 #ifdef HAVE_SEMAPHORE_H
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40 debug_mutex = (sem_t*)output_mutex;
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41 #endif
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42 memset(indent, ' ', MAX_DEPTH*4);
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43 indent[MAX_DEPTH*4] = '\0';
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44 if (debug_fp) pst_debug_close();
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45 if (!fname) return;
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46 if ((debug_fp = fopen(fname, "wb")) == NULL) {
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47 fprintf(stderr, "Opening of file %s failed\n", fname);
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48 exit(1);
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49 }
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50 }
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52
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53 void pst_debug_func(const char* function) {
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54 struct pst_debug_func *func_ptr = pst_malloc (sizeof(struct pst_debug_func));
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55 func_ptr->name = strdup(function);
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56 func_ptr->next = func_head;
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57 func_head = func_ptr;
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58 func_depth++;
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59 }
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62 void pst_debug_func_ret() {
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63 //remove the head item
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64 struct pst_debug_func *func_ptr = func_head;
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65 if (func_head) {
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66 func_head = func_head->next;
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67 free(func_ptr->name);
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68 free(func_ptr);
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69 func_depth--;
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70 } else {
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71 DIE(("function list is empty!\n"));
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72 }
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73 }
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76 static void pst_debug_info(int line, const char* file);
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77 static void pst_debug_info(int line, const char* file) {
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78 int le = (func_depth > MAX_DEPTH) ? MAX_DEPTH : func_depth;
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79 if (le > 0) le--;
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80 char *func = (func_head ? func_head->name : "No Function");
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81 pst_debug_lock();
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82 fprintf(debug_fp, "%06d %.*s%s %s(%d) ", getpid(), le*4, indent, func, file, line);
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83 }
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84
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85
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86 void pst_debug(int line, const char* file, const char *fmt, ...) {
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87 if (debug_fp) {
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88 pst_debug_info(line, file);
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89 va_list ap;
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90 va_start(ap,fmt);
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91 vfprintf(debug_fp, fmt, ap);
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92 va_end(ap);
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93 fflush(debug_fp);
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94 pst_debug_unlock();
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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 void pst_debug_hexdump(int line, const char *file, const char *buf, size_t size, int cols, int delta) {
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100 if (debug_fp) {
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101 pst_debug_info(line, file);
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102 pst_debug_hexdumper(debug_fp, buf, size, cols, delta);
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103 pst_debug_unlock();
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104 }
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105 }
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106
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107
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108 void pst_debug_hexdumper(FILE *out, const char *buf, size_t size, int cols, int delta) {
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109 int le = (func_depth > MAX_DEPTH) ? MAX_DEPTH : func_depth;
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110 size_t off = 0, toff;
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111 int count = 0;
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112
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113 if (!out) return; // no file
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114
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115 if (cols == -1) cols = NUM_COL;
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116 fprintf(out, "\n");
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117 while (off < size) {
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118 fprintf(out, "%06d %.*s%06"PRIx64"\t:", getpid(), le*4, indent, (int64_t)(off+delta));
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119 toff = off;
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120 while (count < cols && off < size) {
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121 fprintf(out, "%02hhx ", (unsigned char)buf[off]);
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122 off++; count++;
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123 }
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124 off = toff;
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125 while (count < cols) {
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126 // only happens at end of block to pad the text over to the text column
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127 fprintf(out, " ");
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128 count++;
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129 }
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130 count = 0;
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131 fprintf(out, ":");
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132 while (count < cols && off < size) {
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133 fprintf(out, "%c", isgraph(buf[off])?buf[off]:'.');
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134 off++; count ++;
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135 }
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136
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137 fprintf(out, "\n");
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138 count=0;
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139 }
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140
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141 fprintf(out, "\n");
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142 fflush(out);
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143 }
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144
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145
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146 void pst_debug_close(void) {
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147 while (func_head) {
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148 struct pst_debug_func *func_ptr = func_head;
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149 func_head = func_head->next;
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150 free(func_ptr->name);
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151 free(func_ptr);
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152 }
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153 if (debug_fp) fclose(debug_fp);
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154 debug_fp = NULL;
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155 }
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156
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157
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158 void *pst_malloc(size_t size) {
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159 void *mem = malloc(size);
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160 if (!mem) {
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161 fprintf(stderr, "pst_malloc: Out Of memory [req: %ld]\n", (long)size);
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162 exit(1);
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163 }
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164 return mem;
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165 }
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166