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Overview
| Comment: | Make sure the parser generated by lemon always calls destructors on unused symbols, even if there is no action following the rule. Ticket #2171. (CVS 3593) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0c5c1b931dfdc163f300f458e4b305c9 |
| User & Date: | drh 2007-01-16 03:09:03 |
Context
|
2007-01-16
| ||
| 18:19 | Additional memory initialization in lemon - bug reported from wireshark. Ticket #2172. Note this problem only comes up with certain grammars, and does not impact SQLite. On the other hand, it might cause SQLite to run slower. So we might want to revisit this change at some point. (CVS 3594) (check-in: d537aa5e user: drh tags: trunk) | |
| 03:09 | Make sure the parser generated by lemon always calls destructors on unused symbols, even if there is no action following the rule. Ticket #2171. (CVS 3593) (check-in: 0c5c1b93 user: drh tags: trunk) | |
|
2007-01-12
| ||
| 23:43 | Fix a bug in sqlite3_prepare_v2() introduced by checkin (3578) and reported on the mailing list. (CVS 3592) (check-in: 87248470 user: drh tags: trunk) | |
Changes
Changes to tool/lemon.c.
3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 .... 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 .... 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 |
char lhsused = 0; /* True if the LHS element has been used */
char used[MAXRHS]; /* True for each RHS element which is used */
for(i=0; i<rp->nrhs; i++) used[i] = 0;
lhsused = 0;
append_str(0,0,0,0);
for(cp=rp->code; *cp; cp++){
if( isalpha(*cp) && (cp==rp->code || (!isalnum(cp[-1]) && cp[-1]!='_')) ){
char saved;
for(xp= &cp[1]; isalnum(*xp) || *xp=='_'; xp++);
saved = *xp;
*xp = 0;
if( rp->lhsalias && strcmp(cp,rp->lhsalias)==0 ){
append_str("yygotominor.yy%d",0,rp->lhs->dtnum,0);
................................................................................
append_str(" yy_destructor(%d,&yymsp[%d].minor);\n", 0,
rp->rhs[i]->index,i-rp->nrhs+1);
}else{
/* No destructor defined for this term */
}
}
}
cp = append_str(0,0,0,0);
rp->code = Strsafe(cp);
}
/*
** Generate code which executes when the rule "rp" is reduced. Write
** the code to "out". Make sure lineno stays up-to-date.
*/
PRIVATE void emit_code(out,rp,lemp,lineno)
................................................................................
for(rp=lemp->rule; rp; rp=rp->next){
fprintf(out," { %d, %d },\n",rp->lhs->index,rp->nrhs); lineno++;
}
tplt_xfer(lemp->name,in,out,&lineno);
/* Generate code which execution during each REDUCE action */
for(rp=lemp->rule; rp; rp=rp->next){
if( rp->code ) translate_code(lemp, rp);
}
for(rp=lemp->rule; rp; rp=rp->next){
struct rule *rp2;
if( rp->code==0 ) continue;
fprintf(out," case %d:\n",rp->index); lineno++;
for(rp2=rp->next; rp2; rp2=rp2->next){
if( rp2->code==rp->code ){
|
| > | | > | |
3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 .... 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 .... 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 |
char lhsused = 0; /* True if the LHS element has been used */ char used[MAXRHS]; /* True for each RHS element which is used */ for(i=0; i<rp->nrhs; i++) used[i] = 0; lhsused = 0; append_str(0,0,0,0); for(cp=(rp->code?rp->code:""); *cp; cp++){ if( isalpha(*cp) && (cp==rp->code || (!isalnum(cp[-1]) && cp[-1]!='_')) ){ char saved; for(xp= &cp[1]; isalnum(*xp) || *xp=='_'; xp++); saved = *xp; *xp = 0; if( rp->lhsalias && strcmp(cp,rp->lhsalias)==0 ){ append_str("yygotominor.yy%d",0,rp->lhs->dtnum,0); ................................................................................ append_str(" yy_destructor(%d,&yymsp[%d].minor);\n", 0, rp->rhs[i]->index,i-rp->nrhs+1); }else{ /* No destructor defined for this term */ } } } if( rp->code ){ cp = append_str(0,0,0,0); rp->code = Strsafe(cp?cp:""); } } /* ** Generate code which executes when the rule "rp" is reduced. Write ** the code to "out". Make sure lineno stays up-to-date. */ PRIVATE void emit_code(out,rp,lemp,lineno) ................................................................................ for(rp=lemp->rule; rp; rp=rp->next){ fprintf(out," { %d, %d },\n",rp->lhs->index,rp->nrhs); lineno++; } tplt_xfer(lemp->name,in,out,&lineno); /* Generate code which execution during each REDUCE action */ for(rp=lemp->rule; rp; rp=rp->next){ translate_code(lemp, rp); } for(rp=lemp->rule; rp; rp=rp->next){ struct rule *rp2; if( rp->code==0 ) continue; fprintf(out," case %d:\n",rp->index); lineno++; for(rp2=rp->next; rp2; rp2=rp2->next){ if( rp2->code==rp->code ){ |