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debug.l
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/* -*-C-*-
* Lexical scanner for command line parsing
*
* Copyright 1993 Eric Youngdale
* 2000 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
%option noinput nounput always-interactive 8bit prefix="dbg_"
%{
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#define YY_NO_UNISTD_H
#include "debugger.h"
#include "dbg.tab.h"
#undef YY_INPUT
static char** local_lexemes /* = NULL */;
static int next_lexeme /* = 0 */;
static int alloc_lexeme /* = 0 */;
char* lexeme_alloc_size(int size)
{
assert(0 <= next_lexeme && next_lexeme < alloc_lexeme + 1);
if (next_lexeme >= alloc_lexeme)
{
alloc_lexeme += 32;
local_lexemes = realloc(local_lexemes, alloc_lexeme * sizeof(local_lexemes[0]));
assert(local_lexemes);
}
return local_lexemes[next_lexeme++] = malloc(size + 1);
}
static char* lexeme_alloc(const char* lexeme)
{
char* ptr = lexeme_alloc_size(strlen(lexeme) + 1);
return strcpy(ptr, lexeme);
}
static char* lexeme_alloc_if(const char* lexeme, unsigned sz)
{
size_t len = strlen(lexeme);
char* ptr;
if (len <= sz) return NULL;
len -= sz;
ptr = lexeme_alloc_size(len + 1);
memcpy(ptr, lexeme, len);
ptr[len] = '\0';
return ptr;
}
void lexeme_flush(void)
{
while (--next_lexeme >= 0) free(local_lexemes[next_lexeme]);
next_lexeme = 0;
}
/* called with quoted string, unescape all elements inside the quotes */
static char* unescape_string(const char* str)
{
size_t len = strlen(str) - 2;
char* ret = lexeme_alloc_size(len + 1);
char* dst = ret;
const char* ptr;
for (ptr = str + 1; ptr < str + 1 + len; ptr++)
{
if (*ptr == '\\')
{
switch (*++ptr)
{
case 't': *dst++ = '\t'; break;
case 'r': *dst++ = '\r'; break;
case 'n': *dst++ = '\n'; break;
case '\\': *dst++ = '\\'; break;
case '"': *dst++ = '"'; break;
default: *dst++ = '\\'; *dst++ = *ptr; /* not handled, don't change */
}
}
else
*dst++ = *ptr;
}
*dst = '\0';
return ret;
}
static int resolve_identifier(const char* id, DBG_STYPE* lval)
{
if (types_find_type(id, SymTagTypedef, &lval->type)) return tTYPEDEF;
lval->string = lexeme_alloc(id);
return tIDENTIFIER;
}
#define YY_INPUT(buf,result,max_size) \
(result = input_lex_read_buffer(buf, max_size))
static int syntax_error;
%}
OCTDIGIT [0-7]
DIGIT [0-9]
HEXDIGIT [0-9a-fA-F]
FORMAT [ubcdgiswxa]
IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*
SCOPED_IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*"::"
MODULE_IDENTIFIER [_a-zA-Z~?\*][_a-zA-Z0-9~?\*@\.]*"!"
PATHNAME [\\/_a-zA-Z0-9\.~@][\\/\-_a-zA-Z0-9\.~@]*
STRING \"(\\[^\n]|[^\\"\n])*\"
%s FORMAT_EXPECTED
%s INFO_CMD
%s HELP_CMD
%s BD_CMD
%s LOCAL_CMD
%s SHOW_CMD
%s MODE_CMD
%s MAINT_CMD
%s NOCMD
%s PATH_ACCEPTED
%x PATH_EXPECTED
%x ASTRING_EXPECTED
%x AWORD_EXPECTED
%x NOPROCESS
%%
/* set to special state when no process is loaded. */
if (!dbg_num_processes() && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
<<EOF>> { return tEOF; }
<*>"#"[^\n]* /* Skip comments */
<*>\n { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
/* Indicates end of command. Reset state. */
"||" { return OP_LOR; }
"&&" { return OP_LAND; }
"==" { return OP_EQ; }
"!=" { return OP_NE; }
"<=" { return OP_LE; }
">=" { return OP_GE; }
"<<" { return OP_SHL; }
">>" { return OP_SHR; }
"->" { return OP_DRF; }
"[" { return *yytext; }
"]" { return *yytext; }
"0x"{HEXDIGIT}+ { sscanf(yytext, "%I64x", &dbg_lval.integer); return tNUM; }
{DIGIT}+ { sscanf(yytext, "%I64d", &dbg_lval.integer); return tNUM; }
"'\\''" { dbg_lval.integer = '\''; return tNUM;}
"'\\0"{OCTDIGIT}*"'" { sscanf(yytext + 3, "%I64o", &dbg_lval.integer); return tNUM;}
"'\\x"{HEXDIGIT}+"'" { sscanf(yytext + 3, "%I64x", &dbg_lval.integer); return tNUM;}
"'\\"[a-z]"'" { dbg_lval.integer = yytext[2] - 'a'; return tNUM;}
"'"."'" { dbg_lval.integer = yytext[1]; return tNUM;}
<FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT} { char* last;
dbg_lval.integer = strtol(yytext+1, &last, 0) << 8;
dbg_lval.integer |= *last;
return tFORMAT; }
<FORMAT_EXPECTED>"/"{FORMAT} { dbg_lval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
<*>{STRING} { dbg_lval.string = unescape_string(yytext); return tSTRING;}
<ASTRING_EXPECTED>[^\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
dbg_lval.string = lexeme_alloc(p); return tSTRING; }
<AWORD_EXPECTED>[^ \t\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
dbg_lval.string = lexeme_alloc(p); return tSTRING; }
<INITIAL,NOPROCESS>info|inf|in { BEGIN(INFO_CMD); return tINFO; }
<INITIAL>up { BEGIN(NOCMD); return tUP; }
<INITIAL>down|dow|do { BEGIN(NOCMD); return tDOWN; }
<INITIAL,INFO_CMD>frame|fram|fra|fr { BEGIN(NOCMD); return tFRAME; }
<INITIAL>list|lis|li|l { BEGIN(PATH_ACCEPTED); return tLIST; }
<INITIAL>enable|enabl|enab|ena { BEGIN(BD_CMD); return tENABLE;}
<INITIAL>disable|disabl|disab|disa|dis { BEGIN(BD_CMD); return tDISABLE; }
<INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
<INITIAL>locally|local { BEGIN(LOCAL_CMD); return tLOCAL; }
<INITIAL,LOCAL_CMD>display|displa|displ|disp { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
<INFO_CMD,BD_CMD>display|displa|displ|disp|dis|di|d { BEGIN(NOCMD); return tDISPLAY; }
<INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und { BEGIN(NOCMD); return tUNDISPLAY; }
<INITIAL>delete|delet|dele|del { BEGIN(BD_CMD); return tDELETE; }
<INITIAL>thread|threa|thre|thr|th { BEGIN(NOCMD); return tTHREAD; }
<INITIAL,NOPROCESS>quit|qui|qu|q { BEGIN(NOCMD); return tQUIT; }
<INITIAL>set|se { BEGIN(NOCMD); return tSET; }
<INITIAL>x { BEGIN(FORMAT_EXPECTED); return tEXAM; }
<INITIAL,NOPROCESS>help|hel|he|"?" { BEGIN(HELP_CMD); return tHELP; }
<INITIAL,NOPROCESS>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
<INITIAL,NOPROCESS>where|wher|whe { BEGIN(NOCMD); return tBACKTRACE; }
<INITIAL>continue|continu|contin|conti|cont|con|co|c { BEGIN(NOCMD); return tCONT; }
<INITIAL>pass|pas|pa { BEGIN(NOCMD); return tPASS; }
<INITIAL>condition|conditio|conditi|condit|condi|cond { BEGIN(NOCMD); return tCOND; }
<INITIAL>step|ste|st|s { BEGIN(NOCMD); return tSTEP; }
<INITIAL>next|nex|ne|n { BEGIN(NOCMD); return tNEXT; }
<INITIAL>stepi|si { BEGIN(NOCMD); return tSTEPI; }
<INITIAL>nexti|ni { BEGIN(NOCMD); return tNEXTI; }
<INITIAL>finish|finis|fini|fin|fi { BEGIN(NOCMD); return tFINISH; }
<INITIAL>abort|abor|abo { BEGIN(NOCMD); return tABORT; }
<INITIAL>print|prin|pri|pr|p { BEGIN(FORMAT_EXPECTED); return tPRINT; }
<INITIAL>show|sho|sh { BEGIN(SHOW_CMD); return tSHOW; }
<INITIAL,NOPROCESS>source|sourc|sour|src { BEGIN(PATH_EXPECTED); return tSOURCE; }
<INITIAL>symbolfile|symbols|symbol|sf { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
<INITIAL,INFO_CMD>wow { return tWOW; }
<INITIAL,INFO_CMD,BD_CMD>break|brea|bre|br|b { BEGIN(PATH_ACCEPTED); return tBREAK; }
<INITIAL,INFO_CMD,BD_CMD>hbreak|hbrea|hbre|hbr|hb { BEGIN(PATH_ACCEPTED); return tHBREAK; }
<INITIAL>watch|watc|wat { BEGIN(NOCMD); return tWATCH; }
<INITIAL>rwatch|rwatc|rwat { BEGIN(NOCMD); return tRWATCH; }
<INITIAL>whatis|whati|what { BEGIN(NOCMD); return tWHATIS; }
<INITIAL,NOPROCESS>run|ru|r { BEGIN(AWORD_EXPECTED); return tRUN;}
<INITIAL,NOPROCESS>exec-file { BEGIN(PATH_EXPECTED); return tEXECFILE;}
<INITIAL>detach|detac|deta|det { BEGIN(NOCMD); return tDETACH; }
<INITIAL>kill|kil|ki|k { BEGIN(NOCMD); return tKILL; }
<INITIAL,NOPROCESS>maintenance|maint { BEGIN(MAINT_CMD); return tMAINTENANCE; }
<INITIAL>minidump|mdmp { BEGIN(PATH_EXPECTED); return tMINIDUMP; }
<INITIAL>echo { BEGIN(ASTRING_EXPECTED); return tECHO; }
<INITIAL,NOPROCESS>attach|attac|atta|att { BEGIN(NOCMD); return tATTACH; }
<INFO_CMD>share|shar|sha { return tSHARE; }
<MAINT_CMD>module|modul|mod { BEGIN(ASTRING_EXPECTED); return tMODULE; }
<INFO_CMD>locals|local|loca|loc { return tLOCAL; }
<INFO_CMD>class|clas|cla { return tCLASS; }
<INFO_CMD>process|proces|proce|proc { return tPROCESS; }
<INFO_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
<INFO_CMD>exception|except|exc|ex { return tEXCEPTION; }
<INFO_CMD>registers|regs|reg|re { return tREGS; }
<INFO_CMD>allregs|allreg|allre { return tALLREGS; }
<INFO_CMD>"all-registers"|"all-regs"|"all-reg"|"all-re" { return tALLREGS; }
<INFO_CMD>segments|segment|segm|seg|se { return tSEGMENTS; }
<INFO_CMD>stack|stac|sta|st { return tSTACK; }
<INFO_CMD>symbol|symbo|symb|sym { BEGIN(ASTRING_EXPECTED); return tSYMBOL; }
<INFO_CMD>maps|map { return tMAPS; }
<INFO_CMD>window|windo|wind|win|wnd { return tWND; }
<INFO_CMD>system|syst|sys { return tSYSTEM; }
<HELP_CMD>info|inf|in { return tINFO; }
<MAINT_CMD>type { return tTYPE; }
<INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
BEGIN(PATH_EXPECTED); return tDIR; }
{MODULE_IDENTIFIER}?void { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tVOID; } /* return modulename if present */
{MODULE_IDENTIFIER}?char { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tCHAR; }
{MODULE_IDENTIFIER}?WCHAR { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tWCHAR; }
{MODULE_IDENTIFIER}?short { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tSHORT; }
{MODULE_IDENTIFIER}?int { dbg_lval.string = lexeme_alloc_if(yytext, 4); return tINT; }
{MODULE_IDENTIFIER}?long { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tLONG; }
{MODULE_IDENTIFIER}?float { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tFLOAT; }
{MODULE_IDENTIFIER}?double { dbg_lval.string = lexeme_alloc_if(yytext, 7); return tDOUBLE; }
{MODULE_IDENTIFIER}?unsigned { dbg_lval.string = lexeme_alloc_if(yytext, 9); return tUNSIGNED; }
{MODULE_IDENTIFIER}?signed { dbg_lval.string = lexeme_alloc_if(yytext, 7); return tSIGNED; }
struct { return tSTRUCT; }
union { return tUNION; }
enum { return tENUM; }
all { return tALL; }
{MODULE_IDENTIFIER}?{SCOPED_IDENTIFIER}*{IDENTIFIER} { return resolve_identifier(yytext, &dbg_lval); }
"$"{IDENTIFIER} { dbg_lval.string = lexeme_alloc(yytext+1); return tINTVAR; }
<PATH_EXPECTED,PATH_ACCEPTED>{PATHNAME} { dbg_lval.string = lexeme_alloc(yytext); return tPATH; }
[-+<=>|&^()*/%:!~,\.] { return *yytext; }
<*>[ \t\r]+ /* Eat up whitespace and DOS LF */
<NOPROCESS>. { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
<*>. { if (syntax_error == 0) { syntax_error++; dbg_printf("Syntax Error (%s)\n", yytext); } }
%%
#ifndef dbg_wrap
int dbg_wrap(void) { return 1; }
#endif