1 | /*
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2 | ** cmdmisc.c - mruby debugger miscellaneous command functions
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3 | **
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4 | */
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5 |
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6 | #include <stdlib.h>
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7 | #include <string.h>
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8 |
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9 | #include "mruby/compile.h"
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10 | #include "mrdb.h"
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11 |
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12 | typedef struct help_msg
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13 | {
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14 | const char *cmd1;
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15 | const char *cmd2;
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16 | const char *short_msg;
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17 | const char *long_msg;
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18 | } help_msg;
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19 |
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20 | static help_msg help_msg_list[] = {
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21 | {
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22 | "b[reak]", NULL, "Set breakpoint",
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23 | "Usage: break [file:]line\n"
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24 | " break [class:]method\n"
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25 | "\n"
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26 | "Set breakpoint at specified line or method.\n"
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27 | "If \'[file:]line\' is specified, break at start of code for that line (in a file).\n"
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28 | "If \'[class:]method\' is specified, break at start of code for that method (of the class).\n"
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29 | },
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30 | {
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31 | "c[ontinue]", NULL, "Continue program being debugged",
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32 | "Usage: continue [N]\n"
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33 | "\n"
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34 | "Continue program stopped by a breakpoint.\n"
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35 | "If N, which is non negative value, is passed,\n"
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36 | "proceed program until the N-th breakpoint is coming.\n"
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37 | "If N is not passed, N is assumed 1.\n"
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38 | },
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39 | {
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40 | "d[elete]", NULL, "Delete some breakpoints",
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41 | "Usage: delete [bpno1 [bpno2 [... [bpnoN]]]]\n"
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42 | "\n"
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43 | "Delete some breakpoints.\n"
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44 | "Arguments are breakpoint numbers with spaces in between.\n"
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45 | "To delete all breakpoints, give no argument.\n"
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46 | },
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47 | {
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48 | "dis[able]", NULL, "Disable some breakpoints",
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49 | "Usage: disable [bpno1 [bpno2 [... [bpnoN]]]]\n"
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50 | "\n"
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51 | "Disable some breakpoints.\n"
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52 | "Arguments are breakpoint numbers with spaces in between.\n"
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53 | "To disable all breakpoints, give no argument.\n"
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54 | },
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55 | {
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56 | "en[able]", NULL, "Enable some breakpoints",
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57 | "Usage: enable [bpno1 [bpno2 [... [bpnoN]]]]\n"
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58 | "\n"
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59 | "Enable some breakpoints.\n"
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60 | "Arguments are breakpoint numbers with spaces in between.\n"
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61 | "To enable all breakpoints, give no argument.\n"
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62 | },
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63 | {
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64 | "ev[al]", NULL, "Evaluate expression",
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65 | "Usage: eval expr\n"
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66 | "\n"
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67 | "It evaluates and prints the value of the mruby expression.\n"
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68 | "This is equivalent to the \'print\' command.\n"
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69 | },
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70 | {
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71 | "h[elp]", NULL, "Print this help",
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72 | "Usage: help [command]\n"
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73 | "\n"
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74 | "With no arguments, help displays a short list of commands.\n"
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75 | "With a command name as help argument, help displays how to use that command.\n"
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76 | },
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77 | {
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78 | "i[nfo]", "b[reakpoints]", "Status of breakpoints",
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79 | "Usage: info breakpoints [bpno1 [bpno2 [... [bpnoN]]]]\n"
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80 | "\n"
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81 | "Status of specified breakpoints (all user-settable breakpoints if no argument).\n"
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82 | "Arguments are breakpoint numbers with spaces in between.\n"
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83 | },
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84 | {
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85 | "l[ist]", NULL, "List specified line",
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86 | "Usage: list\n"
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87 | " list first[,last]\n"
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88 | " list filename:first[,last]\n"
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89 | "\n"
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90 | "Print lines from a source file.\n"
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91 | "\n"
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92 | "With first and last, list prints lines from first to last.\n"
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93 | "When last is empty, it stands for ten lines away from first.\n"
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94 | "With filename, list prints lines in the specified source file.\n"
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95 | },
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96 | {
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97 | "p[rint]", NULL, "Print value of expression",
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98 | "Usage: print expr\n"
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99 | "\n"
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100 | "It evaluates and prints the value of the mruby expression.\n"
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101 | "This is equivalent to the \'eval\' command.\n"
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102 | },
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103 | {
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104 | "q[uit]", NULL, "Exit mrdb",
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105 | "Usage: quit\n"
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106 | "\n"
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107 | "Exit mrdb.\n"
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108 | },
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109 | {
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110 | "r[un]", NULL, "Start debugged program",
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111 | "Usage: run\n"
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112 | "\n"
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113 | "Start debugged program.\n"
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114 | },
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115 | {
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116 | "s[tep]", NULL, "Step program until it reaches a different source line",
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117 | "Usage: step\n"
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118 | "\n"
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119 | "Step program until it reaches a different source line.\n"
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120 | },
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121 | { NULL, NULL, NULL, NULL }
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122 | };
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123 |
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124 | typedef struct listcmd_parser_state
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125 | {
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126 | mrb_bool parse_error;
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127 | mrb_bool has_line_min;
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128 | mrb_bool has_line_max;
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129 | char *filename;
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130 | uint16_t line_min;
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131 | uint16_t line_max;
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132 | } listcmd_parser_state;
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133 |
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134 | static listcmd_parser_state*
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135 | listcmd_parser_state_new(mrb_state *mrb)
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136 | {
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137 | listcmd_parser_state *st = (listcmd_parser_state *)mrb_malloc(mrb, sizeof(listcmd_parser_state));
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138 | memset(st, 0, sizeof(listcmd_parser_state));
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139 | return st;
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140 | }
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141 |
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142 | static void
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143 | listcmd_parser_state_free(mrb_state *mrb, listcmd_parser_state *st)
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144 | {
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145 | if (st != NULL) {
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146 | if (st->filename != NULL) {
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147 | mrb_free(mrb, st->filename);
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148 | }
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149 | mrb_free(mrb, st);
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150 | }
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151 | }
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152 |
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153 | static mrb_bool
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154 | parse_uint(char **sp, uint16_t *n)
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155 | {
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156 | char *p;
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157 | int i;
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158 |
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159 | if (*sp == NULL || **sp == '\0') {
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160 | return FALSE;
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161 | }
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162 |
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163 | for (p = *sp; *p != '\0' && ISDIGIT(*p); p++);
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164 |
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165 | if (p != *sp && (i = atoi(*sp)) >= 0) {
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166 | *n = (uint16_t)i;
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167 | *sp = p;
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168 | return TRUE;
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169 | }
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170 | return FALSE;
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171 | }
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172 |
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173 | static mrb_bool
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174 | skip_char(char **sp, char c)
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175 | {
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176 | if (*sp != NULL && **sp == c) {
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177 | ++*sp;
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178 | return TRUE;
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179 | }
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180 | return FALSE;
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181 | }
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182 |
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183 | static mrb_bool
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184 | parse_lineno(mrb_state *mrb, char **sp, listcmd_parser_state *st)
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185 | {
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186 | if (*sp == NULL || **sp == '\0') {
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187 | return FALSE;
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188 | }
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189 |
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190 | st->has_line_min = FALSE;
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191 | st->has_line_max = FALSE;
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192 |
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193 | if (parse_uint(sp, &st->line_min)) {
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194 | st->has_line_min = TRUE;
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195 | }
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196 | else {
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197 | return FALSE;
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198 | }
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199 |
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200 | if (skip_char(sp, ',')) {
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201 | if (parse_uint(sp, &st->line_max)) {
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202 | st->has_line_max = TRUE;
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203 | }
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204 | else {
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205 | st->parse_error = TRUE;
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206 | return FALSE;
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207 | }
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208 | }
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209 | return TRUE;
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210 | }
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211 |
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212 | static mrb_bool
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213 | parse_filename(mrb_state *mrb, char **sp, listcmd_parser_state *st)
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214 | {
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215 | char *p;
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216 | int len;
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217 |
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218 | if (st->filename != NULL) {
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219 | mrb_free(mrb, st->filename);
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220 | st->filename = NULL;
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221 | }
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222 |
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223 | if ((p = strchr(*sp, ':')) != NULL) {
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224 | len = p - *sp;
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225 | }
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226 | else {
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227 | len = strlen(*sp);
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228 | }
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229 |
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230 | if (len > 0) {
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231 | st->filename = mrb_malloc(mrb, len + 1);
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232 | strlcpy(st->filename, *sp, len + 1);
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233 | st->filename[len] = '\0';
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234 | *sp += len;
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235 | return TRUE;
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236 | }
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237 | else {
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238 | return FALSE;
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239 | }
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240 | }
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241 |
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242 | char*
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243 | replace_ext(mrb_state *mrb, const char *filename, const char *ext)
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244 | {
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245 | size_t len, len2;
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246 | const char *p;
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247 | char *s;
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248 |
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249 | if (filename == NULL) {
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250 | return NULL;
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251 | }
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252 |
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253 | if ((p = strrchr(filename, '.')) != NULL && strchr(p, '/') == NULL) {
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254 | len = p - filename;
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255 | }
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256 | else {
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257 | len = strlen(filename);
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258 | }
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259 |
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260 | len2 = len + strlen(ext) + 1;
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261 | s = mrb_malloc(mrb, len2);
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262 | memset(s, '\0', len2);
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263 | strlcpy(s, filename, len);
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264 | strlcat(s, ext, len2);
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265 |
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266 | return s;
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267 | }
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268 |
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269 | static mrb_bool
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270 | parse_listcmd_args(mrb_state *mrb, mrdb_state *mrdb, listcmd_parser_state *st)
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271 | {
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272 | char *p;
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273 |
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274 | switch (mrdb->wcnt) {
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275 | case 2:
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276 | p = mrdb->words[1];
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277 |
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278 | /* mrdb->words[1] ::= <lineno> | <filename> ':' <lineno> | <filename> */
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279 | if (!parse_lineno(mrb, &p, st)) {
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280 | if (parse_filename(mrb, &p, st)) {
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281 | if (skip_char(&p, ':')) {
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282 | if (!parse_lineno(mrb, &p, st)) {
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283 | st->parse_error = TRUE;
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284 | }
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285 | }
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286 | }
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287 | else {
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288 | st->parse_error = TRUE;
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289 | }
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290 | }
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291 | if (*p != '\0') {
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292 | st->parse_error = TRUE;
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293 | }
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294 | break;
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295 | case 1:
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296 | case 0:
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297 | /* do nothing */
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298 | break;
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299 | default:
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300 | st->parse_error = TRUE;
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301 | printf("too many arguments\n");
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302 | break;
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303 | }
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304 |
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305 | if (!st->parse_error) {
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306 | if (!st->has_line_min) {
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307 | st->line_min = (!st->filename && mrdb->dbg->prvline > 0) ? mrdb->dbg->prvline : 1;
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308 | }
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309 |
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310 | if (!st->has_line_max) {
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311 | st->line_max = st->line_min + 9;
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312 | }
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313 |
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314 | if (st->filename == NULL) {
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315 | if (mrdb->dbg->prvfile && strcmp(mrdb->dbg->prvfile, "-")) {
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316 | st->filename = replace_ext(mrb, mrdb->dbg->prvfile, ".rb");
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317 | }
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318 | }
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319 | }
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320 |
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321 | if (st->parse_error || st->filename == NULL) {
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322 | return FALSE;
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323 | }
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324 |
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325 | return TRUE;
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326 | }
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327 |
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328 | static mrb_bool
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329 | check_cmd_pattern(const char *pattern, const char *cmd)
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330 | {
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331 | const char *lbracket, *rbracket, *p, *q;
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332 |
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333 | if (pattern == NULL && cmd == NULL) {
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334 | return TRUE;
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335 | }
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336 | if (pattern == NULL || cmd == NULL) {
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337 | return FALSE;
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338 | }
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339 | if ((lbracket = strchr(pattern, '[')) == NULL) {
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340 | return !strcmp(pattern, cmd);
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341 | }
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342 | if ((rbracket = strchr(pattern, ']')) == NULL) {
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343 | return FALSE;
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344 | }
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345 | if (strncmp(pattern, cmd, lbracket - pattern)) {
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346 | return FALSE;
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347 | }
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348 |
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349 | p = lbracket + 1;
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350 | q = (char *)cmd + (lbracket - pattern);
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351 |
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352 | for (; p < rbracket && *q != '\0'; p++, q++) {
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353 | if (*p != *q) {
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354 | break;
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355 | }
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356 | }
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357 | return *q == '\0';
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358 | }
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359 |
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360 | static help_msg*
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361 | get_help_msg(char *cmd1, char *cmd2)
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362 | {
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363 | help_msg *p;
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364 |
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365 | if (cmd1 == NULL) {
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366 | return NULL;
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367 | }
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368 | for (p = help_msg_list; p->cmd1 != NULL; p++) {
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369 | if (check_cmd_pattern(p->cmd1, cmd1) && check_cmd_pattern(p->cmd2, cmd2)) {
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370 | return p;
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371 | }
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372 | }
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373 | return NULL;
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374 | }
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375 |
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376 | static mrb_bool
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377 | show_short_help(void)
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378 | {
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379 | help_msg *p;
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380 |
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381 | printf("Commands\n");
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382 |
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383 | for (p = help_msg_list; p->cmd1 != NULL; p++) {
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384 | if (p->cmd2 == NULL) {
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385 | printf(" %s -- %s\n", p->cmd1, p->short_msg);
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386 | }
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387 | else {
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388 | printf(" %s %s -- %s\n", p->cmd1, p->cmd2, p->short_msg);
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389 | }
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390 | }
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391 | return TRUE;
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392 | }
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393 |
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394 | static mrb_bool
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395 | show_long_help(char *cmd1, char *cmd2)
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396 | {
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397 | help_msg *help;
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398 |
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399 | if ((help = get_help_msg(cmd1, cmd2)) == NULL) {
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400 | return FALSE;
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401 | }
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402 | printf("%s", help->long_msg);
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403 | return TRUE;
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404 | }
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405 |
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406 | dbgcmd_state
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407 | dbgcmd_help(mrb_state *mrb, mrdb_state *mrdb)
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408 | {
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409 | mrb_bool is_valid;
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410 | int i;
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411 |
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412 | switch (mrdb->wcnt) {
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413 | case 0:
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414 | case 1:
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415 | is_valid = show_short_help();
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416 | break;
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417 | case 2:
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418 | is_valid = show_long_help(mrdb->words[1], NULL);
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419 | break;
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420 | case 3:
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421 | is_valid = show_long_help(mrdb->words[1], mrdb->words[2]);
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422 | break;
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423 | default:
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424 | is_valid = FALSE;
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425 | break;
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426 | }
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427 |
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428 | if (!is_valid) {
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429 | printf("Invalid command \"");
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430 | for (i = 1; i < mrdb->wcnt; i++) {
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431 | printf("%s%s", i == 1 ? "" : " ", mrdb->words[i]);
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432 | }
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433 | printf("\". Try \"help\".\n");
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434 | }
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435 |
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436 | return DBGST_PROMPT;
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437 | }
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438 |
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439 | dbgcmd_state
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440 | dbgcmd_quit(mrb_state *mrb, mrdb_state *mrdb)
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441 | {
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442 | switch (mrdb->dbg->xm) {
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443 | case DBG_RUN:
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444 | case DBG_STEP:
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445 | case DBG_NEXT:
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446 | while (1) {
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447 | char c;
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448 | int buf;
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449 |
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450 | printf("The program is running. Exit anyway? (y or n) ");
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451 | fflush(stdout);
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452 |
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453 | if ((buf = getchar()) == EOF) {
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454 | InterlockedExchange(&mrdb->dbg->xm, DBG_QUIT);
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455 | break;
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456 | }
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457 | c = buf;
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458 | while (buf != '\n' && (buf = getchar()) != EOF);
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459 |
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460 | if (c == 'y' || c == 'Y') {
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461 | InterlockedExchange(&mrdb->dbg->xm, DBG_QUIT);
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462 | break;
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463 | }
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464 | else if (c == 'n' || c == 'N') {
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465 | break;
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466 | }
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467 | else {
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468 | printf("Please answer y or n.\n");
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469 | }
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470 | }
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471 | break;
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472 | default:
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473 | InterlockedExchange(&mrdb->dbg->xm, DBG_QUIT);
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474 | break;
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475 | }
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476 |
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477 | if (mrdb->dbg->xm == DBG_QUIT) {
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478 | struct RClass *exc;
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479 | exc = mrb_define_class(mrb, "DebuggerExit", mrb_class_get(mrb, "Exception"));
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480 | mrb_raise(mrb, exc, "Exit mrdb.");
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481 | }
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482 | return DBGST_PROMPT;
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483 | }
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