For debug build, check that the stack pointer never exceeds the stack size.

jeremyhylton · jeremyhylton · commit 14368158c2f7 · 2001-10-17T13:29:30.000Z
diff --git 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)
