1 files changed, 48 insertions, 0 deletions
diff --git a/src/include/utils/memdebug.h b/src/include/utils/memdebug.h
index 90eb926ddf4..206e6ce0028 100644
--- a/src/include/utils/memdebug.h
+++ b/src/include/utils/memdebug.h
@@ -31,4 +31,52 @@
 #define VALGRIND_MEMPOOL_CHANGE(context, optr, nptr, size)	do {} while (0)
 #endif
 
+
+#ifdef CLOBBER_FREED_MEMORY
+
+/* Wipe freed memory for debugging purposes */
+static inline void
+wipe_mem(void *ptr, size_t size)
+{
+	VALGRIND_MAKE_MEM_UNDEFINED(ptr, size);
+	memset(ptr, 0x7F, size);
+	VALGRIND_MAKE_MEM_NOACCESS(ptr, size);
+}
+
+#endif   /* CLOBBER_FREED_MEMORY */
+
+#ifdef MEMORY_CONTEXT_CHECKING
+
+static inline void
+set_sentinel(void *base, Size offset)
+{
+	char	   *ptr = (char *) base + offset;
+
+	VALGRIND_MAKE_MEM_UNDEFINED(ptr, 1);
+	*ptr = 0x7E;
+	VALGRIND_MAKE_MEM_NOACCESS(ptr, 1);
+}
+
+static inline bool
+sentinel_ok(const void *base, Size offset)
+{
+	const char *ptr = (const char *) base + offset;
+	bool		ret;
+
+	VALGRIND_MAKE_MEM_DEFINED(ptr, 1);
+	ret = *ptr == 0x7E;
+	VALGRIND_MAKE_MEM_NOACCESS(ptr, 1);
+
+	return ret;
+}
+
+#endif   /* MEMORY_CONTEXT_CHECKING */
+
+#ifdef RANDOMIZE_ALLOCATED_MEMORY
+
+void		randomize_mem(char *ptr, size_t size);
+
+#endif   /* RANDOMIZE_ALLOCATED_MEMORY */
+
+
 #endif   /* MEMDEBUG_H */