debugger/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 %{
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include "winbase.h"
  26 #include "wincon.h"
  27 #include "debugger.h"
  28 #include "y.tab.h"
  29
  30 #undef YY_INPUT
  31
  32 static int DEBUG_FetchFromLine(const char* pfx, char* buf, int size);
  33
  34 #define YY_INPUT(buf,result,max_size) \
  35         if ( (result = DEBUG_FetchFromLine("Wine-dbg>", buf, max_size)) <= 0 ) \
  36             YY_FATAL_ERROR( "ReadLine() in flex scanner failed" );
  37
  38
  39 #define YY_NO_UNPUT
  40
  41 static int syntax_error;
  42 %}
  43
  44 DIGIT      [0-9]
  45 HEXDIGIT   [0-9a-fA-F]
  46 FORMAT     [ubcdgiswx]
  47 IDENTIFIER [_a-zA-Z~][_a-zA-Z0-9~@]*
  48 PATHNAME   [/_a-zA-Z\.~][/_a-zA-Z0-9\.~@]*
  49 STRING     \"[^\n"]+\"
  50
  51 %s FORMAT_EXPECTED
  52 %s PATH_EXPECTED
  53 %s INFO_CMD
  54 %s HELP_CMD
  55 %s DEL_CMD
  56 %s WALK_CMD
  57 %s SHOW_CMD
  58 %s MODE_CMD
  59 %s NOCMD
  60
  61 %x ASTRING_EXPECTED
  62 %x NOPROCESS
  63 %%
  64                                         /* set to special state when no process is loaded. */
  65                                         if (!DEBUG_CurrProcess && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
  66
  67 <*>\n                                   { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
  68                                         /* Indicates end of command. Reset state. */
  69
  70 "||"                                    { return OP_LOR; }
  71 "&&"                                    { return OP_LAND; }
  72 "=="                                    { return OP_EQ; }
  73 "!="                                    { return OP_NE; }
  74 "<="                                    { return OP_LE; }
  75 ">="                                    { return OP_GE; }
  76 "<<"                                    { return OP_SHL; }
  77 ">>"                                    { return OP_SHR; }
  78 "->"                                    { return OP_DRF; }
  79 [-+<=>|&^()*/%:!~,\.]                   { return *yytext; }
  80 "["                                     { return *yytext; }
  81 "]"                                     { return *yytext; }
  82
  83 "0x"{HEXDIGIT}+                         { sscanf(yytext, "%x", &yylval.integer); return tNUM; }
  84 {DIGIT}+                                { sscanf(yytext, "%d", &yylval.integer); return tNUM; }
  85
  86 <FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT}    { char* last;
  87                                           yylval.integer = strtol( yytext+1, &last, 0 ) << 8;
  88                                           yylval.integer |= *last;
  89                                           return tFORMAT; }
  90
  91 <FORMAT_EXPECTED>"/"{FORMAT}            { yylval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
  92
  93 {STRING}                                { yylval.string = DEBUG_MakeSymbol(yytext); return tSTRING; }
  94 <ASTRING_EXPECTED>[^\n]+                { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
  95                                           yylval.string = DEBUG_MakeSymbol(p); return tSTRING; }
  96
  97 <INITIAL>info|inf|in                    { BEGIN(INFO_CMD); return tINFO; }
  98 <INITIAL>up                             { BEGIN(NOCMD); return tUP; }
  99 <INITIAL>down|dow|do                    { BEGIN(NOCMD); return tDOWN; }
 100 <INITIAL>frame|fram|fra|fr              { BEGIN(NOCMD); return tFRAME; }
 101 <INITIAL>list|lis|li|l                  { BEGIN(PATH_EXPECTED); return tLIST; }
 102 <INITIAL>enable|enabl|enab|ena          { BEGIN(NOCMD); return tENABLE;}
 103 <INITIAL>disable|disabl|disab|disa|dis  { BEGIN(NOCMD); return tDISABLE; }
 104 <INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
 105 <INITIAL,INFO_CMD,DEL_CMD>display|displa|displ|disp     { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
 106 <INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und       { BEGIN(NOCMD); return tUNDISPLAY; }
 107 <INITIAL>delete|delet|dele|del          { BEGIN(DEL_CMD); return tDELETE; }
 108 <INITIAL,NOPROCESS>quit|qui|qu|q        { BEGIN(NOCMD); return tQUIT; }
 109 <INITIAL>set|se                         { BEGIN(NOCMD); return tSET; }
 110 <INITIAL,NOPROCESS>walk|w               { BEGIN(WALK_CMD); return tWALK; }
 111 <INITIAL>x                              { BEGIN(FORMAT_EXPECTED); return tEXAM; }
 112 <INITIAL,NOPROCESS>help|hel|he|"?"              { BEGIN(HELP_CMD); return tHELP; }
 113
 114 <INITIAL>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
 115 <INITIAL>where|wher|whe                 { BEGIN(NOCMD); return tBACKTRACE; }
 116
 117 <INITIAL>cont|con|co|c                  { BEGIN(NOCMD); return tCONT; }
 118 <INITIAL>pass|pas|pa                    { BEGIN(NOCMD); return tPASS; }
 119 <INITIAL>condition|conditio|conditi|condit|condi|cond   { BEGIN(NOCMD); return tCOND; }
 120 <INITIAL>step|ste|st|s                  { BEGIN(NOCMD); return tSTEP; }
 121 <INITIAL>next|nex|ne|n                  { BEGIN(NOCMD); return tNEXT; }
 122 <INITIAL>stepi|si                       { BEGIN(NOCMD); return tSTEPI; }
 123 <INITIAL>nexti|ni                       { BEGIN(NOCMD); return tNEXTI; }
 124 <INITIAL>finish|finis|fini|fin|fi       { BEGIN(NOCMD); return tFINISH; }
 125
 126 <INITIAL>abort|abor|abo                 { BEGIN(NOCMD); return tABORT; }
 127 <INITIAL>print|prin|pri|pr|p            { BEGIN(FORMAT_EXPECTED); return tPRINT; }
 128
 129 <INITIAL>mode                           { BEGIN(MODE_CMD); return tMODE; }
 130 <INITIAL>show|sho|sh                    { BEGIN(SHOW_CMD); return tSHOW; }
 131 <INITIAL>symbolfile|symbols|symbol|sf   { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
 132
 133 <INITIAL,INFO_CMD,DEL_CMD>break|brea|bre|br|b   { BEGIN(NOCMD); return tBREAK; }
 134 <INITIAL>watch|watc|wat                 { BEGIN(NOCMD); return tWATCH; }
 135 <INITIAL>whatis|whati|what              { BEGIN(NOCMD); return tWHATIS; }
 136 <INITIAL,NOPROCESS>run|ru|r             { BEGIN(ASTRING_EXPECTED); return tRUN;}
 137 <INITIAL>detach|detac|deta|det          { BEGIN(NOCMD); return tDETACH; }
 138 <NOPROCESS>attach|attac|atta|att        { BEGIN(NOCMD); return tATTACH; }
 139 <INFO_CMD>share|shar|sha                { return tSHARE; }
 140 <INFO_CMD>locals|local|loca|loc         { return tLOCAL; }
 141 <INFO_CMD,WALK_CMD>class|clas|cla       { return tCLASS; }
 142 <INFO_CMD,WALK_CMD>module|modul|modu|mod { return tMODULE; }
 143 <INFO_CMD,WALK_CMD>queue|queu|que       { return tQUEUE; }
 144 <INFO_CMD,WALK_CMD>process|proces|proce|proc            { return tPROCESS; }
 145 <INFO_CMD,WALK_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
 146 <INFO_CMD,WALK_CMD>modref|modre|modr    { return tMODREF; }
 147 <INFO_CMD>registers|regs|reg|re         { return tREGS; }
 148 <INFO_CMD>segments|segment|segm|seg|se  { return tSEGMENTS; }
 149 <INFO_CMD>stack|stac|sta|st             { return tSTACK; }
 150 <INFO_CMD>maps|map                      { return tMAPS; }
 151 <INFO_CMD,WALK_CMD>window|windo|wind|win|wnd    { return tWND; }
 152 <HELP_CMD>info|inf|in                   { return tINFO; }
 153 <MODE_CMD>vm86                          { return tVM86; }
 154
 155 <INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
 156                                           BEGIN(PATH_EXPECTED); return tDIR; }
 157
 158 char                                    { return tCHAR; }
 159 short                                   { return tSHORT; }
 160 int                                     { return tINT; }
 161 long                                    { return tLONG; }
 162 float                                   { return tFLOAT; }
 163 double                                  { return tDOUBLE; }
 164 unsigned                                { return tUNSIGNED; }
 165 signed                                  { return tSIGNED; }
 166 struct                                  { return tSTRUCT; }
 167 union                                   { return tUNION; }
 168 enum                                    { return tENUM; }
 169
 170 {IDENTIFIER}                            { yylval.string = DEBUG_MakeSymbol(yytext); return tIDENTIFIER; }
 171 "$"{IDENTIFIER}                         { yylval.string = DEBUG_MakeSymbol(yytext+1); return tINTVAR; }
 172
 173 <PATH_EXPECTED>{PATHNAME}               { yylval.string = DEBUG_MakeSymbol(yytext); return tPATH; }
 174
 175 <*>[ \t]+                               /* Eat up whitespace */
 176
 177 <NOPROCESS>.                            { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
 178 <*>.                                    { if (syntax_error == 0) {
 179                                              syntax_error++;
 180                                              DEBUG_Printf(DBG_CHN_MESG, "Syntax Error (%s)\n", yytext); }
 181                                         }
 182 %%
 183
 184 #ifndef yywrap
 185 int yywrap(void) { return 1; }
 186 #endif
 187
 188 #ifndef whitespace
 189 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
 190 #endif
 191
 192
 193 /* Strip whitespace from the start and end of STRING. */
 194 static void stripwhite(char *string)
 195 {
 196     int         i, last;
 197
 198     for (i = 0; whitespace(string[i]); i++);
 199     if (i) strcpy(string, string + i);
 200
 201     last = i = strlen(string) - 1;
 202     if (string[last] == '\n') i--;
 203
 204     while (i > 0 && whitespace(string[i])) i--;
 205     if (string[last] == '\n')
 206         string[++i] = '\n';
 207     string[++i] = '\0';
 208 }
 209
 210 static int      DEBUG_FetchEntireLine(const char* pfx, char** line, size_t* alloc, BOOL check_nl)
 211 {
 212     char        buf_line[256];
 213     DWORD       nread;
 214     size_t      len;
 215
 216     /* as of today, console handles can be file handles... so better use file APIs rather than
 217      * consoles
 218      */
 219     WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), pfx, strlen(pfx), NULL, NULL);
 220
 221     len = 0;
 222     do
 223     {
 224         if (!ReadFile(GetStdHandle(STD_INPUT_HANDLE), buf_line, sizeof(buf_line) - 1, &nread, NULL))
 225             break;
 226         buf_line[nread] = '\0';
 227
 228         if (check_nl && len == 0 && nread == 1 && buf_line[0] == '\n')
 229             return 0;
 230
 231         /* store stuff at the end of last_line */
 232         if (len + nread + 1 > *alloc)
 233         {
 234             *line = HeapReAlloc(GetProcessHeap(), 0, *line, *alloc += nread + 1);
 235         }
 236         strcpy(*line + len, buf_line);
 237         len += nread;
 238     } while (nread == 0 || buf_line[nread - 1] != '\n');
 239
 240     /* Remove leading and trailing whitespace from the line */
 241     stripwhite(*line);
 242     return 1;
 243 }
 244
 245 static int DEBUG_FetchFromLine(const char* pfx, char* buf, int size)
 246 {
 247     size_t      len;
 248 static char*  last_line = NULL;
 249 static size_t last_line_size = 0;
 250 static size_t last_line_idx = 0;
 251
 252     /* first alloc of our current buffer */
 253     if (!last_line)
 254     {
 255         last_line = HeapAlloc(GetProcessHeap(), 0, last_line_size = 2);
 256         assert(last_line);
 257         last_line[0] = '\n';
 258         last_line[1] = '\0';
 259     }
 260
 261     /* try first to fetch the remaining of an existing line */
 262     if (last_line_idx == 0)
 263     {
 264         /* no remaining chars to be read from last line, grab a brand new line up to '\n' */
 265         DEBUG_FlushSymbols();
 266
 267         DEBUG_FetchEntireLine(pfx, &last_line, &last_line_size, TRUE);
 268     }
 269
 270     len = min(strlen(last_line + last_line_idx), size - 1);
 271     memcpy(buf, last_line + last_line_idx, len);
 272     buf[len] = '\0';
 273     if ((last_line_idx += len) >= strlen(last_line))
 274         last_line_idx = 0;
 275     return len;
 276 }
 277
 278 int DEBUG_ReadLine(const char* pfx, char* buf, int size)
 279 {
 280     char*       line = NULL;
 281     size_t      len = 0;
 282
 283     DEBUG_FetchEntireLine(pfx, &line, &len, FALSE);
 284     len = min(size, len);
 285     memcpy(buf, line, len - 1);
 286     buf[len] = '\0';
 287     return len - 1;
 288 }
 289
 290 static char** local_symbols /* = NULL */;
 291 static int next_symbol /* = 0 */;
 292 static int alloc_symbol /* = 0 */;
 293
 294 char* DEBUG_MakeSymbol(const char* symbol)
 295 {
 296     assert(0 <= next_symbol && next_symbol < alloc_symbol + 1);
 297     if (next_symbol >= alloc_symbol)
 298     {
 299         local_symbols = HeapReAlloc(GetProcessHeap(), 0, local_symbols,
 300                                     (alloc_symbol += 32) * sizeof(local_symbols[0]));
 301         assert(local_symbols);
 302     }
 303     return local_symbols[next_symbol++] = DBG_strdup(symbol);
 304 }
 305
 306 void DEBUG_FlushSymbols(void)
 307 {
 308     while(--next_symbol >= 0) DBG_free(local_symbols[next_symbol]);
 309     next_symbol = 0;
 310 }