From 14368158c2f7b646a170c0e31cdf115c0947a697 Mon Sep 17 00:00:00 2001
From: Jeremy Hylton <jeremy@alum.mit.edu>
Date: Wed, 17 Oct 2001 13:29:30 +0000
Subject: [PATCH] For debug build, check that the stack pointer never exceeds
 the stack size.

---
 Python/ceval.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Python/ceval.c b/Python/ceval.c
index ef995948fb8..b0371aa4471 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -542,7 +542,9 @@ eval_frame(PyFrameObject *f)
 #define BASIC_POP()	(*--stack_pointer)
 
 #ifdef LLTRACE
-#define PUSH(v)		(void)(BASIC_PUSH(v), lltrace && prtrace(TOP(), "push"))
+#define PUSH(v)		{ (void)(BASIC_PUSH(v), \
+                               lltrace && prtrace(TOP(), "push")); \
+                               assert(STACK_LEVEL() <= f->f_stacksize); }
 #define POP()		((void)(lltrace && prtrace(TOP(), "pop")), BASIC_POP())
 #else
 #define PUSH(v)		BASIC_PUSH(v)