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+ if USE_STACKCHECK is defined, use PyOS_CheckStack to look

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for excessive recursion.
This commit is contained in:
Fredrik Lundh 2000-08-07 17:33:38 +00:00
parent aa39a7edf7
commit 18c2aa25a1
1 changed files with 7 additions and 0 deletions
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7
Modules/_sre.c
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@ -58,7 +58,9 @@ char copyright[] = " SRE 0.9.8 Copyright (c) 1997-2000 by Secret Labs AB ";
/* optional features */ /* optional features */
/* prevent run-away recursion (bad patterns on long strings) */ /* prevent run-away recursion (bad patterns on long strings) */
#if !defined(USE_STACKCHECK)
#define USE_RECURSION_LIMIT 10000 #define USE_RECURSION_LIMIT 10000
#endif
/* enables fast searching */ /* enables fast searching */
#define USE_FAST_SEARCH #define USE_FAST_SEARCH
@ -527,6 +529,11 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern, int level)
TRACE(("%8d: enter %d\n", PTR(ptr), level)); TRACE(("%8d: enter %d\n", PTR(ptr), level));
#if defined(USE_STACKCHECK)
if (level % 10 == 0 && PyOS_CheckStack()) {
return SRE_ERROR_RECURSION_LIMIT;
#endif
#if defined(USE_RECURSION_LIMIT) #if defined(USE_RECURSION_LIMIT)
if (level > USE_RECURSION_LIMIT) if (level > USE_RECURSION_LIMIT)
return SRE_ERROR_RECURSION_LIMIT; return SRE_ERROR_RECURSION_LIMIT;