tlibregexp: fix match choice bug This bug fix allows some pathological regular expressions to cause the regexp library to report a stack overflow (really a stack filling; safe) but it also fixes the behavior of some common regexps. It is too hard to satisfy both. - plan9port - [fork] Plan 9 from user space
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---
DIR commit 27589754e47a2d2e682ee29daa2d21dff99e509d
DIR parent 79ff7e4b5e5c157aa1347152752eb7c2903ecaca
HTML Author: Russ Cox <rsc@swtch.com>
Date: Thu, 10 Jan 2008 17:06:51 -0500
libregexp: fix match choice bug
This bug fix allows some pathological regular
expressions to cause the regexp library to
report a stack overflow (really a stack filling; safe)
but it also fixes the behavior of some common regexps.
It is too hard to satisfy both.
Diffstat:
M src/libregexp/regexec.c | 2 +-
M src/libregexp/rregexec.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
---
DIR diff --git a/src/libregexp/regexec.c b/src/libregexp/regexec.c
t@@ -132,7 +132,7 @@ regexec1(Reprog *progp, /* program to run */
break;
case OR:
/* evaluate right choice later */
- if(_renewthread(tl, inst->u1.right, ms, &tlp->se) == tle)
+ if(_renewthread(tlp, inst->u1.right, ms, &tlp->se) == tle)
return -1;
/* efficiency: advance and re-evaluate */
continue;
DIR diff --git a/src/libregexp/rregexec.c b/src/libregexp/rregexec.c
t@@ -125,7 +125,7 @@ rregexec1(Reprog *progp, /* program to run */
break;
case OR:
/* evaluate right choice later */
- if(_renewthread(tl, inst->u1.right, ms, &tlp->se) == tle)
+ if(_renewthread(tlp, inst->u1.right, ms, &tlp->se) == tle)
return -1;
/* efficiency: advance and re-evaluate */
continue;