diff --git a/src/backend/utils/mmgr/mcxt.c b/src/backend/utils/mmgr/mcxt.c
index 2bfd364..2845089 100644
--- a/src/backend/utils/mmgr/mcxt.c
+++ b/src/backend/utils/mmgr/mcxt.c
@@ -788,26 +788,7 @@ MemoryContextAllocZero(MemoryContext context, Size size)
 {
 	void	   *ret;
 
-	AssertArg(MemoryContextIsValid(context));
-	AssertNotInCriticalSection(context);
-
-	if (!AllocSizeIsValid(size))
-		elog(ERROR, "invalid memory alloc request size %zu", size);
-
-	context->isReset = false;
-
-	ret = (*context->methods->alloc) (context, size);
-	if (ret == NULL)
-	{
-		MemoryContextStats(TopMemoryContext);
-		ereport(ERROR,
-				(errcode(ERRCODE_OUT_OF_MEMORY),
-				 errmsg("out of memory"),
-				 errdetail("Failed on request of size %zu.", size)));
-	}
-
-	VALGRIND_MEMPOOL_ALLOC(context, ret, size);
-
+	ret = MemoryContextAlloc(context, size);
 	MemSetAligned(ret, 0, size);
 
 	return ret;
@@ -825,26 +806,7 @@ MemoryContextAllocZeroAligned(MemoryContext context, Size size)
 {
 	void	   *ret;
 
-	AssertArg(MemoryContextIsValid(context));
-	AssertNotInCriticalSection(context);
-
-	if (!AllocSizeIsValid(size))
-		elog(ERROR, "invalid memory alloc request size %zu", size);
-
-	context->isReset = false;
-
-	ret = (*context->methods->alloc) (context, size);
-	if (ret == NULL)
-	{
-		MemoryContextStats(TopMemoryContext);
-		ereport(ERROR,
-				(errcode(ERRCODE_OUT_OF_MEMORY),
-				 errmsg("out of memory"),
-				 errdetail("Failed on request of size %zu.", size)));
-	}
-
-	VALGRIND_MEMPOOL_ALLOC(context, ret, size);
-
+	ret = MemoryContextAlloc(context, size);
 	MemSetLoop(ret, 0, size);
 
 	return ret;