=== modified file 'pcre/pcre.h.in'
--- pcre/pcre.h.in	2013-09-26 14:02:17 +0000
+++ pcre/pcre.h.in	2013-10-02 07:58:29 +0000
@@ -486,6 +486,7 @@ PCRE_EXP_DECL void  (*pcre_free)(void *)
 PCRE_EXP_DECL void *(*pcre_stack_malloc)(size_t);
 PCRE_EXP_DECL void  (*pcre_stack_free)(void *);
 PCRE_EXP_DECL int   (*pcre_callout)(pcre_callout_block *);
+PCRE_EXP_DECL int   (*pcre_stack_guard)(void);
 
 PCRE_EXP_DECL void *(*pcre16_malloc)(size_t);
 PCRE_EXP_DECL void  (*pcre16_free)(void *);
@@ -504,6 +505,7 @@ PCRE_EXP_DECL void  pcre_free(void *);
 PCRE_EXP_DECL void *pcre_stack_malloc(size_t);
 PCRE_EXP_DECL void  pcre_stack_free(void *);
 PCRE_EXP_DECL int   pcre_callout(pcre_callout_block *);
+PCRE_EXP_DECL int   pcre_stack_guard(void);
 
 PCRE_EXP_DECL void *pcre16_malloc(size_t);
 PCRE_EXP_DECL void  pcre16_free(void *);

=== modified file 'pcre/pcre_compile.c'
--- pcre/pcre_compile.c	2013-09-26 14:02:17 +0000
+++ pcre/pcre_compile.c	2013-10-02 07:58:29 +0000
@@ -7107,6 +7107,12 @@ unsigned int orig_bracount;
 unsigned int max_bracount;
 branch_chain bc;
 
+if (pcre_stack_guard && pcre_stack_guard())
+{
+  *errorcodeptr= ERR23;
+  return FALSE;
+}
+ 
 bc.outer = bcptr;
 bc.current_branch = code;
 

=== modified file 'pcre/pcre_globals.c'
--- pcre/pcre_globals.c	2013-09-26 14:02:17 +0000
+++ pcre/pcre_globals.c	2013-10-02 07:58:29 +0000
@@ -72,6 +72,7 @@ PCRE_EXP_DATA_DEFN void  (*PUBL(free))(v
 PCRE_EXP_DATA_DEFN void *(*PUBL(stack_malloc))(size_t) = LocalPcreMalloc;
 PCRE_EXP_DATA_DEFN void  (*PUBL(stack_free))(void *) = LocalPcreFree;
 PCRE_EXP_DATA_DEFN int   (*PUBL(callout))(PUBL(callout_block) *) = NULL;
+PCRE_EXP_DATA_DEFN int   (*PUBL(stack_guard))(void) = NULL;
 
 #elif !defined VPCOMPAT
 PCRE_EXP_DATA_DEFN void *(*PUBL(malloc))(size_t) = malloc;
@@ -79,6 +80,7 @@ PCRE_EXP_DATA_DEFN void  (*PUBL(free))(v
 PCRE_EXP_DATA_DEFN void *(*PUBL(stack_malloc))(size_t) = malloc;
 PCRE_EXP_DATA_DEFN void  (*PUBL(stack_free))(void *) = free;
 PCRE_EXP_DATA_DEFN int   (*PUBL(callout))(PUBL(callout_block) *) = NULL;
+PCRE_EXP_DATA_DEFN int   (*PUBL(stack_guard))(void) = NULL;
 #endif
 
 /* End of pcre_globals.c */