From: Nicholas Clark <nick@ccl4.org>
Date: Sat, 17 Dec 2005 23:22:31 +0000 (+0000)
Subject: Add some paranoia to check that GP accesses aren't being done on the
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=f4b190e604dfeb3b326a17a85144eca8e832729d;p=p5sagit%2Fp5-mst-13.2.git

Add some paranoia to check that GP accesses aren't being done on the
wrong types of SV.

p4raw-id: //depot/perl@26395
---

diff --git a/gv.h b/gv.h
index d9a5b51..f179494 100644
--- a/gv.h
+++ b/gv.h
@@ -24,7 +24,14 @@ struct gp {
 
 #define GvXPVGV(gv)	((XPVGV*)SvANY(gv))
 
-#define GvGP(gv)	(GvXPVGV(gv)->xgv_gp)
+#ifdef DEBUGGING
+#  define GvGP(gv)	(*(assert(SvTYPE(gv) == SVt_PVGV || \
+				  SvTYPE(gv) == SVt_PVLV), \
+			   &(GvXPVGV(gv)->xgv_gp)))
+#else
+#  define GvGP(gv)	(GvXPVGV(gv)->xgv_gp)
+#endif
+
 #define GvNAME(gv)	(GvXPVGV(gv)->xgv_name)
 #define GvNAMELEN(gv)	(GvXPVGV(gv)->xgv_namelen)
 #define GvSTASH(gv)	(GvXPVGV(gv)->xgv_stash)