debugger/debug.l

   1 /* -*-C-*-
   2  * Lexical scanner for command line parsing
   3  *
   4  * Copyright 1993 Eric Youngdale
   5  *           2000 Eric Pouech
   6  */
   7
   8 %{
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include "debugger.h"
  12 #include "y.tab.h"
  13
  14 #ifndef DONT_USE_READLINE
  15 #undef YY_INPUT
  16 #define YY_INPUT(buf,result,max_size) \
  17         if ( (result = dbg_read((char *) buf, max_size )) < 0 ) \
  18             YY_FATAL_ERROR( "read() in flex scanner failed" );
  19
  20 static int dbg_read(char * buf, int size);
  21 static char * DEBUG_MakeSymbol(char *);
  22
  23 #endif  /* DONT_USE_READLINE */
  24
  25 #define YY_NO_UNPUT
  26
  27 static int syntax_error;
  28 %}
  29
  30 DIGIT      [0-9]
  31 HEXDIGIT   [0-9a-fA-F]
  32 FORMAT     [ubcdiswx]
  33 IDENTIFIER [_a-zA-Z\.~][_a-zA-Z0-9\.~@]*
  34 PATHNAME   [/_a-zA-Z\.~][/_a-zA-Z0-9\.~@]*
  35 STRING     \"[^\n"]+\"
  36
  37 %s FORMAT_EXPECTED
  38 %s PATH_EXPECTED
  39 %s INFO_CMD
  40 %s HELP_CMD
  41 %s DEL_CMD
  42 %s WALK_CMD
  43 %s SHOW_CMD
  44 %s MODE_CMD
  45 %s NOCMD
  46
  47 %x ASTRING_EXPECTED
  48 %x NOPROCESS
  49 %%
  50                                         /* set to special state when no process is loaded. */
  51                                         if (!DEBUG_CurrProcess && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
  52
  53 <*>\n                                   { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
  54                                         /* Indicates end of command. Reset state. */
  55
  56 "||"                                    { return OP_LOR; }
  57 "&&"                                    { return OP_LAND; }
  58 "=="                                    { return OP_EQ; }
  59 "!="                                    { return OP_NE; }
  60 "<="                                    { return OP_LE; }
  61 ">="                                    { return OP_GE; }
  62 "<<"                                    { return OP_SHL; }
  63 ">>"                                    { return OP_SHR; }
  64 "->"                                    { return OP_DRF; }
  65 [-+<=>|&^()*/%:!~,\.]                   { return *yytext; }
  66 "["                                     { return *yytext; }
  67 "]"                                     { return *yytext; }
  68
  69 "0x"{HEXDIGIT}+                         { sscanf(yytext, "%x", &yylval.integer); return tNUM; }
  70 {DIGIT}+                                { sscanf(yytext, "%d", &yylval.integer); return tNUM; }
  71
  72 <FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT}    { char* last;
  73                                           yylval.integer = strtol( yytext+1, &last, 0 ) << 8;
  74                                           yylval.integer |= *last;
  75                                           return tFORMAT; }
  76
  77 <FORMAT_EXPECTED>"/"{FORMAT}            { yylval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
  78
  79 {STRING}                                { yylval.string = DEBUG_MakeSymbol(yytext); return tSTRING; }
  80 <ASTRING_EXPECTED>[^\n]+                { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
  81                                           yylval.string = DEBUG_MakeSymbol(p); return tSTRING; }
  82
  83 <INITIAL>info|inf|in                    { BEGIN(INFO_CMD); return tINFO; }
  84 <INITIAL>up                             { BEGIN(NOCMD); return tUP; }
  85 <INITIAL>down|dow|do                    { BEGIN(NOCMD); return tDOWN; }
  86 <INITIAL>frame|fram|fra|fr              { BEGIN(NOCMD); return tFRAME; }
  87 <INITIAL>list|lis|li|l                  { BEGIN(PATH_EXPECTED); return tLIST; }
  88 <INITIAL>enable|enabl|enab|ena          { BEGIN(NOCMD); return tENABLE;}
  89 <INITIAL>disable|disabl|disab|disa|dis  { BEGIN(NOCMD); return tDISABLE; }
  90 <INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
  91 <INITIAL,INFO_CMD,DEL_CMD>display|displa|displ|disp     { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
  92 <INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und       { BEGIN(NOCMD); return tUNDISPLAY; }
  93 <INITIAL>delete|delet|dele|del          { BEGIN(DEL_CMD); return tDELETE; }
  94 <INITIAL,NOPROCESS>quit|qui|qu|q        { BEGIN(NOCMD); return tQUIT; }
  95 <INITIAL>set|se                         { BEGIN(NOCMD); return tSET; }
  96 <INITIAL,NOPROCESS>walk|w               { BEGIN(WALK_CMD); return tWALK; }
  97 <INITIAL>x                              { BEGIN(FORMAT_EXPECTED); return tEXAM; }
  98 <INITIAL>help|hel|he|"?"                { BEGIN(HELP_CMD); return tHELP; }
  99
 100 <INITIAL>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
 101 <INITIAL>where|wher|whe                 { BEGIN(NOCMD); return tBACKTRACE; }
 102
 103 <INITIAL>cont|con|co|c                  { BEGIN(NOCMD); return tCONT; }
 104 <INITIAL>pass|pas|pa                    { BEGIN(NOCMD); return tPASS; }
 105 <INITIAL>condition|conditio|conditi|condit|condi|cond   { BEGIN(NOCMD); return tCOND; }
 106 <INITIAL>step|ste|st|s                  { BEGIN(NOCMD); return tSTEP; }
 107 <INITIAL>next|nex|ne|n                  { BEGIN(NOCMD); return tNEXT; }
 108 <INITIAL>stepi|si                       { BEGIN(NOCMD); return tSTEPI; }
 109 <INITIAL>nexti|ni                       { BEGIN(NOCMD); return tNEXTI; }
 110 <INITIAL>finish|finis|fini|fin|fi       { BEGIN(NOCMD); return tFINISH; }
 111
 112 <INITIAL>abort|abor|abo                 { BEGIN(NOCMD); return tABORT; }
 113 <INITIAL>print|prin|pri|pr|p            { BEGIN(FORMAT_EXPECTED); return tPRINT; }
 114
 115 <INITIAL>mode                           { BEGIN(MODE_CMD); return tMODE; }
 116 <INITIAL>show|sho|sh                    { BEGIN(SHOW_CMD); return tSHOW; }
 117 <INITIAL>symbolfile|symbols|symbol|sf   { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
 118
 119 <INITIAL,INFO_CMD,DEL_CMD>break|brea|bre|br|b   { BEGIN(PATH_EXPECTED); return tBREAK; }
 120 <INITIAL>watch|watc|wat                 { BEGIN(PATH_EXPECTED); return tWATCH; }
 121 <INITIAL>whatis|whati|what              { BEGIN(PATH_EXPECTED); return tWHATIS; }
 122 <INITIAL,NOPROCESS>run|ru|r             { BEGIN(ASTRING_EXPECTED); return tRUN;}
 123 <NOPROCESS>attach|attac|atta|att        { BEGIN(NOCMD); return tATTACH; }
 124 <INFO_CMD>share|shar|sha                { return tSHARE; }
 125 <INFO_CMD>locals|local|loca|loc         { return tLOCAL; }
 126 <INFO_CMD,WALK_CMD>class|clas|cla       { return tCLASS; }
 127 <INFO_CMD,WALK_CMD>module|modul|modu|mod { return tMODULE; }
 128 <INFO_CMD,WALK_CMD>queue|queu|que       { return tQUEUE; }
 129 <INFO_CMD,WALK_CMD>process|proces|proce|proc            { return tPROCESS; }
 130 <INFO_CMD,WALK_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
 131 <INFO_CMD,WALK_CMD>modref|modre|modr    { return tMODREF; }
 132 <INFO_CMD>registers|regs|reg|re         { return tREGS; }
 133 <INFO_CMD>segments|segment|segm|seg|se  { return tSEGMENTS; }
 134 <INFO_CMD>stack|stac|sta|st             { return tSTACK; }
 135 <INFO_CMD>maps|map                      { return tMAPS; }
 136 <INFO_CMD,WALK_CMD>window|windo|wind|win|wnd    { return tWND; }
 137 <HELP_CMD>info|inf|in                   { return tINFO; }
 138 <MODE_CMD>vm86                          { return tVM86; }
 139
 140 <INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
 141                                           BEGIN(PATH_EXPECTED); return tDIR; }
 142
 143 char                                    { return tCHAR; }
 144 short                                   { return tSHORT; }
 145 int                                     { return tINT; }
 146 long                                    { return tLONG; }
 147 float                                   { return tFLOAT; }
 148 double                                  { return tDOUBLE; }
 149 unsigned                                { return tUNSIGNED; }
 150 signed                                  { return tSIGNED; }
 151 struct                                  { return tSTRUCT; }
 152 union                                   { return tUNION; }
 153 enum                                    { return tENUM; }
 154
 155 {IDENTIFIER}                            { yylval.string = DEBUG_MakeSymbol(yytext); return tIDENTIFIER; }
 156 "$"{IDENTIFIER}                         { yylval.string = DEBUG_MakeSymbol(yytext+1); return tINTVAR; }
 157
 158 <PATH_EXPECTED>{PATHNAME}               { yylval.string = DEBUG_MakeSymbol(yytext); return tPATH; }
 159
 160 <*>[ \t]+                               /* Eat up whitespace */
 161
 162 <NOPROCESS>.                            { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
 163 <*>.                                    { if (syntax_error == 0) {
 164                                              syntax_error++;
 165                                              DEBUG_Printf(DBG_CHN_MESG, "Syntax Error (%s)\n", yytext); }
 166                                         }
 167 %%
 168
 169 #ifndef yywrap
 170 int yywrap(void) { return 1; }
 171 #endif
 172
 173 #ifndef DONT_USE_READLINE
 174
 175 #ifndef whitespace
 176 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
 177 #endif
 178
 179
 180 /* Strip whitespace from the start and end of STRING. */
 181 static void stripwhite (char *string)
 182 {
 183   register int i = 0;
 184
 185   while (whitespace (string[i]))
 186     i++;
 187
 188   if (i)
 189     strcpy (string, string + i);
 190
 191   i = strlen (string) - 1;
 192
 193   while (i > 0 && whitespace (string[i]))
 194     i--;
 195
 196   string[++i] = '\0';
 197 }
 198
 199 static int dbg_read(char * buf, int size)
 200 {
 201     static char last_line[256] = "";
 202     char * line;
 203     int len;
 204
 205     for (;;)
 206     {
 207         DEBUG_FlushSymbols();
 208         line = readline ("Wine-dbg>");
 209         if (!line)
 210         {
 211             DEBUG_Printf( DBG_CHN_MESG, "\n" );
 212             DEBUG_Exit(0);
 213         }
 214
 215         /* Remove leading and trailing whitespace from the line */
 216
 217         stripwhite (line);
 218
 219         /* If there is anything left, add it to the history list
 220            and execute it. Otherwise, re-execute last command. */
 221
 222         if (*line)
 223         {
 224             add_history( line );
 225             strncpy( last_line, line, 255 );
 226             last_line[255] = '\0';
 227         }
 228
 229         free( line );
 230         line = last_line;
 231
 232         if ((len = strlen(line)) > 0)
 233         {
 234             if (size < len + 1)
 235             {
 236                 DEBUG_Printf(DBG_CHN_MESG,"Fatal readline goof.\n");
 237                 DEBUG_Exit(0);
 238             }
 239             strcpy(buf, line);
 240             buf[len] = '\n';
 241             buf[len+1] = 0;
 242             return len + 1;
 243         }
 244     }
 245 }
 246
 247 static char *local_symbols[30];
 248 static int next_symbol;
 249
 250 static char * DEBUG_MakeSymbol(char * symbol)
 251 {
 252         assert(0 <= next_symbol && next_symbol < (sizeof(local_symbols) / sizeof(local_symbols[0])));
 253         return local_symbols[next_symbol++] = DBG_strdup(symbol);
 254 }
 255
 256 void DEBUG_FlushSymbols(void)
 257 {
 258         while(--next_symbol >= 0) DBG_free(local_symbols[next_symbol]);
 259         next_symbol = 0;
 260 }
 261
 262 #endif  /* DONT_USE_READLINE */