FreeCalypso > hg > freecalypso-tools
annotate rvinterf/ctracedec/decode.c @ 208:4022bfbaafd4
INSTALL: cosmetic fix in bullet point numbering
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 18 May 2017 07:24:07 +0000 |
parents | e7502631a0f9 |
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rev | line source |
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0
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1 /* |
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2 * This module implements the actual decoding of compressed traces. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <stdio.h> |
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7 #include <ctype.h> |
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8 #include <string.h> |
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9 #include <strings.h> |
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10 #include <stdlib.h> |
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11 |
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12 extern char *str2ind_tab_filename; |
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13 extern int str2ind_array_size; |
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14 extern char **str2ind_orig_strings; |
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15 extern char **str2ind_param_strings; |
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16 |
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17 #define MAX_PRINTF_PARAMS 16 |
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18 |
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19 static int cindex, cindex_nchars; |
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20 static u_char param_bytes_array[256]; |
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21 static int param_bytes_count; |
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22 static char *format_string, *param_type_string; |
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23 static int num_printf_params; |
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24 static u_long printf_params[MAX_PRINTF_PARAMS]; |
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25 static char output_buf[2048]; |
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26 |
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27 decode_hex_digit(c) |
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28 { |
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29 if (isdigit(c)) |
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30 return(c - '0'); |
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31 else if (isupper(c)) |
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32 return(c - 'A' + 10); |
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33 else |
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34 return(c - 'a' + 10); |
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35 } |
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36 |
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37 static int |
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38 decode_idx_and_params(line) |
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39 char *line; |
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40 { |
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41 char *cp; |
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42 u_char *dp; |
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43 |
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44 for (cp = line; isdigit(*cp); cp++) |
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45 ; |
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46 if (*cp && *cp != ' ') |
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47 return(-1); |
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48 cindex = atoi(line); |
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49 cindex_nchars = cp - line; |
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50 for (dp = param_bytes_array; *cp; ) { |
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51 if (*cp++ != ' ') |
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52 return(-1); |
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53 if (!isxdigit(cp[0]) || !isxdigit(cp[1])) |
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54 return(-1); |
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55 *dp++ = decode_hex_digit(cp[0]) << 4 | decode_hex_digit(cp[1]); |
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56 cp += 2; |
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57 } |
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58 param_bytes_count = dp - param_bytes_array; |
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59 return(0); |
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60 } |
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61 |
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62 static void |
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63 decode_parameters(filename_for_errs, lineno_for_errs) |
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64 char *filename_for_errs; |
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65 { |
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66 int pi, type; |
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67 u_char *bp, *endp; |
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68 |
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69 bp = param_bytes_array; |
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70 endp = bp + param_bytes_count; |
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71 for (pi = 0; pi < num_printf_params; pi++) { |
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72 type = param_type_string[pi]; |
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73 switch (type) { |
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74 case 'c': |
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75 if (bp >= endp) { |
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76 wrong_param_byte_count: fprintf(stderr, |
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77 "%s line %d: wrong number of parameter bytes for %s entry #%d\n", |
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78 filename_for_errs, lineno_for_errs, |
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79 str2ind_tab_filename, cindex); |
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80 exit(1); |
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81 } |
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82 printf_params[pi] = *bp++; |
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83 continue; |
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84 case 'i': |
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85 case 'p': |
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86 case '*': |
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87 if (bp > endp - 4) |
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88 goto wrong_param_byte_count; |
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89 printf_params[pi] = (u_long) bp[0] | |
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90 (u_long) bp[1] << 8 | |
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91 (u_long) bp[2] << 16 | |
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92 (u_long) bp[3] << 24; |
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93 bp += 4; |
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94 continue; |
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95 case 's': |
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96 printf_params[pi] = (u_long) bp; |
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97 for (;;) { |
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98 if (bp >= endp) { |
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99 fprintf(stderr, |
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100 "%s line %d: unterminated string parameter in compressed trace\n", |
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101 filename_for_errs, |
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102 lineno_for_errs); |
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103 exit(1); |
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104 } |
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105 if (!*bp++) |
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106 break; |
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107 } |
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108 continue; |
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109 default: |
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110 fprintf(stderr, |
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111 "%s entry #%d: parameter type \'%c\' not supported\n", |
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112 str2ind_tab_filename, cindex, type); |
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113 exit(1); |
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114 } |
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115 } |
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116 if (bp != endp) |
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117 goto wrong_param_byte_count; |
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118 } |
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119 |
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120 process_ctrace_line(line, cindex_offset, filename_for_errs, lineno_for_errs) |
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121 char *line, *filename_for_errs; |
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122 { |
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123 if (decode_idx_and_params(line + cindex_offset) < 0) { |
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124 fprintf(stderr, |
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125 "%s line %d: unable to decode compressed trace line\n", |
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126 filename_for_errs, lineno_for_errs); |
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127 exit(1); |
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128 } |
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129 if (cindex >= str2ind_array_size) { |
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130 fprintf(stderr, |
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131 "%s line %d: index %d exceeds the range of %s\n", |
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132 filename_for_errs, lineno_for_errs, cindex, |
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133 str2ind_tab_filename); |
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134 exit(1); |
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135 } |
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136 format_string = str2ind_orig_strings[cindex]; |
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137 param_type_string = str2ind_param_strings[cindex]; |
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138 num_printf_params = strlen(param_type_string); |
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139 if (num_printf_params > MAX_PRINTF_PARAMS) { |
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140 fprintf(stderr, |
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141 "error: entry #%d in %s has too many parameters\n", |
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142 cindex, str2ind_tab_filename); |
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143 exit(1); |
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144 } |
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145 decode_parameters(filename_for_errs, lineno_for_errs); |
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146 ind2str_doprnt(format_string, printf_params, output_buf); |
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147 printf("%.*s \"%s\"\n", cindex_offset + cindex_nchars, line, |
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148 output_buf); |
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149 return(0); |
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150 } |