Introduce macro PERL_MAX_SUB_DEPTH

p4raw-id: //depot/perl@32949

3 files changed, 7 insertions, 2 deletions

diff --git a/perl.h b/perl.h
index fa677cad72..c028bba810 100644
--- a/perl.h
+++ b/perl.h
@@ -919,6 +919,11 @@ EXTERN_C int usleep(unsigned int);
 #define PERL_ARENA_SIZE 4080
 #endif
 
+/* Maximum level of recursion */
+#ifndef PERL_MAX_SUB_DEPTH
+#define PERL_MAX_SUB_DEPTH 100
+#endif
+
 #endif /* PERL_CORE */
 
 /* We no longer default to creating a new SV for GvSV.
diff --git a/pp_ctl.c b/pp_ctl.c
index 07f8504fb5..564e437cb5 100644
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -2427,7 +2427,7 @@ PP(pp_goto)
 		if (CvDEPTH(cv) < 2)
 		    SvREFCNT_inc_simple_void_NN(cv);
 		else {
-		    if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
+		    if (CvDEPTH(cv) == PERL_MAX_SUB_DEPTH && ckWARN(WARN_RECURSION))
 			sub_crush_depth(cv);
 		    pad_push(padlist, CvDEPTH(cv));
 		}
diff --git a/pp_hot.c b/pp_hot.c
index a24f802174..e3eebe6a4c 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -2830,7 +2830,7 @@ try_autoload:
 	 * stuff so that __WARN__ handlers can safely dounwind()
 	 * if they want to
 	 */
-	if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
+	if (CvDEPTH(cv) == PERL_MAX_SUB_DEPTH && ckWARN(WARN_RECURSION)
 	    && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
 	    sub_crush_depth(cv);
 #if 0