debugger/debug.l

   1 /* -*-C-*-
   2  * Lexical scanner for command line parsing
   3  *
   4  * Copyright 1993 Eric Youngdale
   5  */
   6
   7 %{
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include "debugger.h"
  11 #include "y.tab.h"
  12
  13 #ifdef DBG_need_heap
  14 #define malloc(x) DBG_alloc(x)
  15 #define realloc(x,y) DBG_realloc(x,y)
  16 #define free(x) DBG_free(x)
  17 #endif
  18
  19 #ifndef DONT_USE_READLINE
  20 #undef YY_INPUT
  21 #define YY_INPUT(buf,result,max_size) \
  22         if ( (result = dbg_read((char *) buf, max_size )) < 0 ) \
  23             YY_FATAL_ERROR( "read() in flex scanner failed" );
  24
  25 static int dbg_read(char * buf, int size);
  26 static char * make_symbol(char *);
  27
  28 #endif  /* DONT_USE_READLINE */
  29
  30 #define YY_NO_UNPUT
  31
  32 static int syntax_error;
  33 %}
  34
  35 DIGIT      [0-9]
  36 HEXDIGIT   [0-9a-fA-F]
  37 FORMAT     [ubcdiswx]
  38 IDENTIFIER [_a-zA-Z\.~][_a-zA-Z0-9\.~@]*
  39 PATHNAME   [/_a-zA-Z\.~][/_a-zA-Z0-9\.~@]*
  40 STRING     \"[^\n"]+\"
  41
  42 %s FORMAT_EXPECTED
  43 %s PATH_EXPECTED
  44 %s INFO_CMD
  45 %s HELP_CMD
  46 %s DEL_CMD
  47 %s WALK_CMD
  48 %s SHOW_CMD
  49 %s NOCMD
  50 %s DEBUGSTR
  51
  52 %%
  53
  54 \n              { BEGIN(0); syntax_error = 0;
  55                   return tEOL; } /*Indicates end of command.  Reset state. */
  56
  57 "||"            { return OP_LOR; }
  58 "&&"            { return OP_LAND; }
  59 "=="            { return OP_EQ; }
  60 "!="            { return OP_NE; }
  61 "<="            { return OP_LE; }
  62 ">="            { return OP_GE; }
  63 "<<"            { return OP_SHL; }
  64 ">>"            { return OP_SHR; }
  65 "->"            { return OP_DRF; }
  66 [-+<=>|&^()*/%:!~,\.]   { return *yytext; }
  67 "["             { return *yytext; }
  68 "]"             { return *yytext; }
  69
  70 "0x"{HEXDIGIT}+      { sscanf(yytext, "%x", &yylval.integer); return tNUM; }
  71 {DIGIT}+             { sscanf(yytext, "%d", &yylval.integer); return tNUM; }
  72
  73
  74 <FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT}  { char * last;
  75                        yylval.integer = strtol( yytext+1, &last, NULL );
  76                        yylval.integer = (yylval.integer << 8) | *last;
  77                        return tFORMAT; }
  78
  79
  80 <FORMAT_EXPECTED>"/"{FORMAT}          { yylval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
  81
  82 {STRING} { yylval.string = make_symbol(yytext); return tSTRING; }
  83 <DEBUGSTR>[a-z+\-,]* { yylval.string = yytext; return tDEBUGSTR; }
  84
  85 <INITIAL>info|inf|in                    { BEGIN(INFO_CMD); return tINFO; }
  86 <INITIAL>up                             { BEGIN(NOCMD); return tUP; }
  87 <INITIAL>down|dow|do                    { BEGIN(NOCMD); return tDOWN; }
  88 <INITIAL>frame|fram|fra|fr              { BEGIN(NOCMD); return tFRAME; }
  89 <INITIAL>list|lis|li|l                  { BEGIN(PATH_EXPECTED); return tLIST; }
  90 <INITIAL>enable|enabl|enab|ena          { BEGIN(NOCMD); return tENABLE;}
  91 <INITIAL>disable|disabl|disab|disa|dis  { BEGIN(NOCMD); return tDISABLE; }
  92 <INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
  93 <INITIAL,INFO_CMD,DEL_CMD>display|displa|displ|disp     { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
  94 <INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und       { BEGIN(NOCMD); return tUNDISPLAY; }
  95 <INITIAL>delete|delet|dele|del          { BEGIN(DEL_CMD); return tDELETE; }
  96 <INITIAL>quit|qui|qu|q                  { BEGIN(NOCMD); return tQUIT; }
  97 <INITIAL>set|se                         { BEGIN(NOCMD); return tSET; }
  98 <INITIAL>walk|w                         { BEGIN(WALK_CMD); return tWALK; }
  99 <INITIAL>x                              { BEGIN(FORMAT_EXPECTED); return tEXAM; }
 100 <INITIAL>help|hel|he|"?"                { BEGIN(HELP_CMD); return tHELP; }
 101
 102 <INITIAL>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
 103 <INITIAL>where|wher|whe                 { BEGIN(NOCMD); return tBACKTRACE; }
 104
 105 <INITIAL>cont|con|co|c                  { BEGIN(NOCMD); return tCONT; }
 106 <INITIAL>pass|pas|pa                    { BEGIN(NOCMD); return tPASS; }
 107 <INITIAL>condition|conditio|conditi|condit|condi|cond   { BEGIN(NOCMD); return tCOND; }
 108 <INITIAL>step|ste|st|s                  { BEGIN(NOCMD); return tSTEP; }
 109 <INITIAL>next|nex|ne|n                  { BEGIN(NOCMD); return tNEXT; }
 110 <INITIAL>stepi|si                       { BEGIN(NOCMD); return tSTEPI; }
 111 <INITIAL>nexti|ni                       { BEGIN(NOCMD); return tNEXTI; }
 112 <INITIAL>finish|finis|fini|fin|fi       { BEGIN(NOCMD); return tFINISH; }
 113
 114 <INITIAL>abort|abor|abo                 { BEGIN(NOCMD); return tABORT; }
 115 <INITIAL>print|prin|pri|pr|p            { BEGIN(FORMAT_EXPECTED); return tPRINT; }
 116
 117 <INITIAL>mode                           { BEGIN(NOCMD); return tMODE; }
 118 <INITIAL>show|sho|sh                    { BEGIN(SHOW_CMD); return tSHOW; }
 119 <INITIAL>symbolfile|symbols|symbol|sf   { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
 120
 121 <INITIAL,INFO_CMD,DEL_CMD>break|brea|bre|br|b   { BEGIN(PATH_EXPECTED); return tBREAK; }
 122 <INITIAL>watch|watc|wat                 { BEGIN(PATH_EXPECTED); return tWATCH; }
 123 <INITIAL>whatis|whati|what              { BEGIN(PATH_EXPECTED); return tWHATIS; }
 124
 125 <INFO_CMD>share|shar|sha                { return tSHARE; }
 126 <INFO_CMD>locals|local|loca|loc         { return tLOCAL; }
 127 <INFO_CMD,WALK_CMD>class|clas|cla       { return tCLASS; }
 128 <INFO_CMD,WALK_CMD>module|modul|modu|mod  { return tMODULE; }
 129 <INFO_CMD,WALK_CMD>queue|queu|que       { return tQUEUE; }
 130 <INFO_CMD,WALK_CMD>process|proces|proce|proc            { return tPROCESS; }
 131 <INFO_CMD,WALK_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
 132 <INFO_CMD,WALK_CMD>modref|modre|modr    { return tMODREF; }
 133 <INFO_CMD>registers|regs|reg|re         { return tREGS; }
 134 <INFO_CMD>segments|segment|segm|seg|se  { return tSEGMENTS; }
 135 <INFO_CMD>stack|stac|sta|st             { return tSTACK; }
 136 <INFO_CMD>maps|map                      { return tMAPS; }
 137 <INFO_CMD,WALK_CMD>window|windo|wind|win|wnd    { return tWND; }
 138 <HELP_CMD>info|inf|in                   { return tINFO; }
 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 = make_symbol(yytext); return tIDENTIFIER; }
 156 "$"{IDENTIFIER} { yylval.string = make_symbol(yytext+1); return tINTVAR; }
 157
 158 <PATH_EXPECTED>{PATHNAME}       { yylval.string = make_symbol(yytext); return tPATH; }
 159
 160 [ \t]+        /* Eat up whitespace */
 161
 162 .               { if (syntax_error == 0)
 163                   {
 164                     syntax_error ++; DEBUG_Printf(DBG_CHN_MESG, "Syntax Error\n");
 165                   }
 166                 }
 167
 168
 169 %%
 170
 171 #ifndef yywrap
 172 int yywrap(void) { return 1; }
 173 #endif
 174
 175 #ifndef DONT_USE_READLINE
 176
 177 #ifndef whitespace
 178 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
 179 #endif
 180
 181
 182 /* Strip whitespace from the start and end of STRING. */
 183 static void stripwhite (char *string)
 184 {
 185   register int i = 0;
 186
 187   while (whitespace (string[i]))
 188     i++;
 189
 190   if (i)
 191     strcpy (string, string + i);
 192
 193   i = strlen (string) - 1;
 194
 195   while (i > 0 && whitespace (string[i]))
 196     i--;
 197
 198   string[++i] = '\0';
 199 }
 200
 201 static int dbg_read(char * buf, int size)
 202 {
 203     static char last_line[256] = "";
 204     char * line;
 205     int len;
 206
 207     for (;;)
 208     {
 209         flush_symbols();
 210         line = readline ("Wine-dbg>");
 211         if (!line)
 212         {
 213             DEBUG_Printf( DBG_CHN_MESG, "\n" );
 214             DEBUG_Exit(0);
 215         }
 216
 217         /* Remove leading and trailing whitespace from the line */
 218
 219         stripwhite (line);
 220
 221         /* If there is anything left, add it to the history list
 222            and execute it. Otherwise, re-execute last command. */
 223
 224         if (*line)
 225         {
 226             add_history( line );
 227             strncpy( last_line, line, 255 );
 228             last_line[255] = '\0';
 229        }
 230
 231         free( line );
 232         line = last_line;
 233
 234         if ((len = strlen(line)) > 0)
 235         {
 236             if (size < len + 1)
 237             {
 238                 DEBUG_Printf(DBG_CHN_MESG,"Fatal readline goof.\n");
 239                 DEBUG_Exit(0);
 240             }
 241             strcpy(buf, line);
 242             buf[len] = '\n';
 243             buf[len+1] = 0;
 244             return len + 1;
 245         }
 246     }
 247 }
 248
 249 static char *local_symbols[30];
 250 static int next_symbol;
 251
 252 static char * make_symbol(char * symbol)
 253 {
 254         return local_symbols[next_symbol++] = DBG_strdup(symbol);
 255 }
 256
 257 void flush_symbols(void)
 258 {
 259         while(--next_symbol>= 0) DBG_free(local_symbols[next_symbol]);
 260         next_symbol = 0;
 261 }
 262
 263 #endif  /* DONT_USE_READLINE */