programs/winedbg/debug.l

   1 /* -*-C-*-
   2  * Lexical scanner for command line parsing
   3  *
   4  * Copyright 1993 Eric Youngdale
   5  *           2000 Eric Pouech
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 %option noinput nounput interactive 8bit prefix="dbg_"
  23
  24 %{
  25 #include "config.h"
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdarg.h>
  29
  30 #define YY_NO_UNISTD_H
  31 #include "debugger.h"
  32 #include "dbg.tab.h"
  33
  34 #undef YY_INPUT
  35
  36 static char** local_lexemes /* = NULL */;
  37 static int next_lexeme /* = 0 */;
  38 static int alloc_lexeme /* = 0 */;
  39
  40 char* lexeme_alloc_size(int size)
  41 {
  42     assert(0 <= next_lexeme && next_lexeme < alloc_lexeme + 1);
  43     if (next_lexeme >= alloc_lexeme)
  44     {
  45         alloc_lexeme += 32;
  46         local_lexemes = dbg_heap_realloc(local_lexemes, alloc_lexeme * sizeof(local_lexemes[0]));
  47         assert(local_lexemes);
  48     }
  49     return local_lexemes[next_lexeme++] = HeapAlloc(GetProcessHeap(), 0, size + 1);
  50 }
  51
  52 static char* lexeme_alloc(const char* lexeme)
  53 {
  54     char*       ptr = lexeme_alloc_size(strlen(lexeme) + 1);
  55     return strcpy(ptr, lexeme);
  56 }
  57
  58 void lexeme_flush(void)
  59 {
  60     while (--next_lexeme >= 0) HeapFree(GetProcessHeap(), 0, local_lexemes[next_lexeme]);
  61     next_lexeme = 0;
  62 }
  63
  64 static int read_input(const char* pfx, char* buf, int size)
  65 {
  66     int len;
  67     static char*  last_line = NULL;
  68     static size_t last_line_idx = 0;
  69
  70     /* try first to fetch the remaining of an existing line */
  71     if (last_line_idx == 0)
  72     {
  73         char* tmp = NULL;
  74         /* no remaining chars to be read from last line, grab a brand new line up to '\n' */
  75         lexeme_flush();
  76         len = input_fetch_entire_line(pfx, &tmp);
  77         if (len < 0) return 0;  /* eof */
  78
  79         /* remove carriage return in newline */
  80         if (len >= 2 && tmp[len - 2] == '\r')
  81         {
  82             tmp[len - 2] = '\n';
  83             tmp[len - 1] = '\0';
  84             len--;
  85         }
  86
  87         /* FIXME: should have a pair of buffers, and switch between the two, instead of
  88          * reallocating a new one for each line
  89          */
  90         if (last_line && (len == 0 || (len == 1 && tmp[0] == '\n')))
  91         {
  92             HeapFree(GetProcessHeap(), 0, tmp);
  93         }
  94         else
  95         {
  96             HeapFree(GetProcessHeap(), 0, last_line);
  97             last_line = tmp;
  98         }
  99     }
 100
 101     len = min(strlen(last_line + last_line_idx), size - 1);
 102     memcpy(buf, last_line + last_line_idx, len);
 103     buf[len] = '\0';
 104     if ((last_line_idx += len) >= strlen(last_line))
 105         last_line_idx = 0;
 106     return len;
 107 }
 108
 109 #define YY_INPUT(buf,result,max_size) \
 110         if ((result = read_input("Wine-dbg>", buf, max_size)) < 0) \
 111             YY_FATAL_ERROR("read_input in flex scanner failed");
 112
 113 static int syntax_error;
 114 %}
 115
 116 OCTDIGIT   [0-7]
 117 DIGIT      [0-9]
 118 HEXDIGIT   [0-9a-fA-F]
 119 FORMAT     [ubcdgiswxa]
 120 IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*
 121 PATHNAME   [\\/_a-zA-Z0-9\.~@][\\/\-_a-zA-Z0-9\.~@]*
 122 STRING     \"[^\n"]+\"
 123
 124 %s FORMAT_EXPECTED
 125 %s INFO_CMD
 126 %s HELP_CMD
 127 %s BD_CMD
 128 %s LOCAL_CMD
 129 %s SHOW_CMD
 130 %s MODE_CMD
 131 %s MAINT_CMD
 132 %s NOCMD
 133 %s PATH_ACCEPTED
 134
 135 %x PATH_EXPECTED
 136 %x ASTRING_EXPECTED
 137 %x NOPROCESS
 138 %%
 139                                         /* set to special state when no process is loaded. */
 140                                         if (!dbg_num_processes() && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
 141
 142 <<EOF>>                                 { return tEOF; }
 143 <*>\n                                   { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
 144                                         /* Indicates end of command. Reset state. */
 145
 146 "||"                                    { return OP_LOR; }
 147 "&&"                                    { return OP_LAND; }
 148 "=="                                    { return OP_EQ; }
 149 "!="                                    { return OP_NE; }
 150 "<="                                    { return OP_LE; }
 151 ">="                                    { return OP_GE; }
 152 "<<"                                    { return OP_SHL; }
 153 ">>"                                    { return OP_SHR; }
 154 "->"                                    { return OP_DRF; }
 155 "::"                                    { return OP_SCOPE; }
 156 "["                                     { return *yytext; }
 157 "]"                                     { return *yytext; }
 158
 159 "0x"{HEXDIGIT}+                         { sscanf(yytext, "%lx", &dbg_lval.integer); return tNUM; }
 160 {DIGIT}+                                { sscanf(yytext, "%ld", &dbg_lval.integer); return tNUM; }
 161 "'\\''"                                 { dbg_lval.integer = '\''; return tNUM;}
 162 "'\\0"{OCTDIGIT}*"'"                    { sscanf(yytext + 3, "%lo", &dbg_lval.integer); return tNUM;}
 163 "'\\x"{HEXDIGIT}+"'"                    { sscanf(yytext + 3, "%lx", &dbg_lval.integer); return tNUM;}
 164 "'\\"[a-z]"'"                           { dbg_lval.integer = yytext[2] - 'a'; return tNUM;}
 165 "'"."'"                                 { dbg_lval.integer = yytext[1]; return tNUM;}
 166
 167 <FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT}    { char* last;
 168                                           dbg_lval.integer = strtol(yytext+1, &last, 0) << 8;
 169                                           dbg_lval.integer |= *last;
 170                                           return tFORMAT; }
 171
 172 <FORMAT_EXPECTED>"/"{FORMAT}            { dbg_lval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
 173
 174 {STRING}                                { dbg_lval.string = lexeme_alloc(yytext + 1); dbg_lval.string[strlen(dbg_lval.string) - 1] = '\0'; return tSTRING; }
 175 <ASTRING_EXPECTED>[^\n]+                { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
 176                                           dbg_lval.string = lexeme_alloc(p); return tSTRING; }
 177
 178 <INITIAL,NOPROCESS>info|inf|in          { BEGIN(INFO_CMD); return tINFO; }
 179 <INITIAL>up                             { BEGIN(NOCMD); return tUP; }
 180 <INITIAL>down|dow|do                    { BEGIN(NOCMD); return tDOWN; }
 181 <INITIAL,INFO_CMD>frame|fram|fra|fr     { BEGIN(NOCMD); return tFRAME; }
 182 <INITIAL>list|lis|li|l                  { BEGIN(PATH_ACCEPTED); return tLIST; }
 183 <INITIAL>enable|enabl|enab|ena          { BEGIN(BD_CMD); return tENABLE;}
 184 <INITIAL>disable|disabl|disab|disa|dis  { BEGIN(BD_CMD); return tDISABLE; }
 185 <INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
 186 <INITIAL>locally|local                  { BEGIN(LOCAL_CMD); return tLOCAL; }
 187 <INITIAL,LOCAL_CMD>display|displa|displ|disp    { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
 188 <INFO_CMD,BD_CMD>display|displa|displ|disp|dis|di|d     { BEGIN(NOCMD); return tDISPLAY; }
 189 <INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und       { BEGIN(NOCMD); return tUNDISPLAY; }
 190 <INITIAL>delete|delet|dele|del          { BEGIN(BD_CMD); return tDELETE; }
 191 <INITIAL,NOPROCESS>quit|qui|qu|q        { BEGIN(NOCMD); return tQUIT; }
 192 <INITIAL>set|se                         { BEGIN(NOCMD); return tSET; }
 193 <INITIAL>x                              { BEGIN(FORMAT_EXPECTED); return tEXAM; }
 194 <INITIAL,NOPROCESS>help|hel|he|"?"      { BEGIN(HELP_CMD); return tHELP; }
 195
 196 <INITIAL,NOPROCESS>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
 197 <INITIAL,NOPROCESS>where|wher|whe       { BEGIN(NOCMD); return tBACKTRACE; }
 198
 199 <INITIAL>cont|con|co|c                  { BEGIN(NOCMD); return tCONT; }
 200 <INITIAL>pass|pas|pa                    { BEGIN(NOCMD); return tPASS; }
 201 <INITIAL>condition|conditio|conditi|condit|condi|cond   { BEGIN(NOCMD); return tCOND; }
 202 <INITIAL>step|ste|st|s                  { BEGIN(NOCMD); return tSTEP; }
 203 <INITIAL>next|nex|ne|n                  { BEGIN(NOCMD); return tNEXT; }
 204 <INITIAL>stepi|si                       { BEGIN(NOCMD); return tSTEPI; }
 205 <INITIAL>nexti|ni                       { BEGIN(NOCMD); return tNEXTI; }
 206 <INITIAL>finish|finis|fini|fin|fi       { BEGIN(NOCMD); return tFINISH; }
 207
 208 <INITIAL>abort|abor|abo                 { BEGIN(NOCMD); return tABORT; }
 209 <INITIAL>print|prin|pri|pr|p            { BEGIN(FORMAT_EXPECTED); return tPRINT; }
 210
 211 <INITIAL>show|sho|sh                    { BEGIN(SHOW_CMD); return tSHOW; }
 212 <INITIAL,NOPROCESS>source|sourc|sour|src { BEGIN(PATH_EXPECTED); return tSOURCE; }
 213 <INITIAL>symbolfile|symbols|symbol|sf   { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
 214
 215 <INITIAL,INFO_CMD,BD_CMD>break|brea|bre|br|b    { BEGIN(PATH_ACCEPTED); return tBREAK; }
 216 <INITIAL,INFO_CMD,BD_CMD>hbreak|hbrea|hbre|hbr|hb { BEGIN(PATH_ACCEPTED); return tHBREAK; }
 217 <INITIAL>watch|watc|wat                 { BEGIN(NOCMD); return tWATCH; }
 218 <INITIAL>rwatch|rwatc|rwat              { BEGIN(NOCMD); return tRWATCH; }
 219 <INITIAL>whatis|whati|what              { BEGIN(NOCMD); return tWHATIS; }
 220 <INITIAL,NOPROCESS>run|ru|r             { BEGIN(ASTRING_EXPECTED); return tRUN;}
 221 <INITIAL>detach|detac|deta|det          { BEGIN(NOCMD); return tDETACH; }
 222 <INITIAL>kill|kil|ki|k                  { BEGIN(NOCMD); return tKILL; }
 223 <INITIAL,NOPROCESS>maintenance|maint    { BEGIN(MAINT_CMD); return tMAINTENANCE; }
 224 <INITIAL>minidump|mdmp                  { BEGIN(PATH_EXPECTED); return tMINIDUMP; }
 225 <INITIAL>echo                           { BEGIN(ASTRING_EXPECTED); return tECHO; }
 226 <NOPROCESS>attach|attac|atta|att        { BEGIN(NOCMD); return tATTACH; }
 227 <INFO_CMD>share|shar|sha                { return tSHARE; }
 228 <MAINT_CMD>module|modul|mod             { BEGIN(ASTRING_EXPECTED); return tMODULE; }
 229 <INFO_CMD>locals|local|loca|loc         { return tLOCAL; }
 230 <INFO_CMD>class|clas|cla                { return tCLASS; }
 231 <INFO_CMD>process|proces|proce|proc     { return tPROCESS; }
 232 <INFO_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
 233 <INFO_CMD>exception|except|exc|ex       { return tEXCEPTION; }
 234 <INFO_CMD>registers|regs|reg|re         { return tREGS; }
 235 <INFO_CMD>allregs|allreg|allre          { return tALLREGS; }
 236 <INFO_CMD>"all-registers"|"all-regs"|"all-reg"|"all-re" { return tALLREGS; }
 237 <INFO_CMD>segments|segment|segm|seg|se  { return tSEGMENTS; }
 238 <INFO_CMD>stack|stac|sta|st             { return tSTACK; }
 239 <INFO_CMD>symbol|symbo|symb|sym         { BEGIN(ASTRING_EXPECTED); return tSYMBOL; }
 240 <INFO_CMD>maps|map                      { return tMAPS; }
 241 <INFO_CMD>window|windo|wind|win|wnd     { return tWND; }
 242 <HELP_CMD>info|inf|in                   { return tINFO; }
 243 <MAINT_CMD>type                         { return tTYPE; }
 244
 245 <INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
 246                                           BEGIN(PATH_EXPECTED); return tDIR; }
 247
 248 char                                    { return tCHAR; }
 249 short                                   { return tSHORT; }
 250 int                                     { return tINT; }
 251 long                                    { return tLONG; }
 252 float                                   { return tFLOAT; }
 253 double                                  { return tDOUBLE; }
 254 unsigned                                { return tUNSIGNED; }
 255 signed                                  { return tSIGNED; }
 256 struct                                  { return tSTRUCT; }
 257 union                                   { return tUNION; }
 258 enum                                    { return tENUM; }
 259 all                                     { return tALL; }
 260
 261 {IDENTIFIER}                            { dbg_lval.string = lexeme_alloc(yytext); return tIDENTIFIER; }
 262 "$"{IDENTIFIER}                         { dbg_lval.string = lexeme_alloc(yytext+1); return tINTVAR; }
 263
 264 <PATH_EXPECTED,PATH_ACCEPTED>{PATHNAME} { dbg_lval.string = lexeme_alloc(yytext); return tPATH; }
 265
 266 [-+<=>|&^()*/%:!~,\.]                   { return *yytext; }
 267
 268 <*>[ \t\r]+                             /* Eat up whitespace and DOS LF */
 269
 270 <NOPROCESS>.                            { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
 271 <*>.                                    { if (syntax_error == 0) { syntax_error++; dbg_printf("Syntax Error (%s)\n", yytext); } }
 272 %%
 273
 274 #ifndef dbg_wrap
 275 int dbg_wrap(void) { return 1; }
 276 #endif