Make sure the memory range is writable before memset'ing it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81308 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Allocator.cpp b/lib/Support/Allocator.cpp
index 36da443..7a3fd87 100644
--- a/lib/Support/Allocator.cpp
+++ b/lib/Support/Allocator.cpp
@@ -15,6 +15,7 @@
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Recycler.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Memory.h"
#include <cstring>
namespace llvm {
@@ -60,6 +61,7 @@
#ifndef NDEBUG
// Poison the memory so stale pointers crash sooner. Note we must
// preserve the Size and NextPtr fields at the beginning.
+ sys::Memory::setRangeWritable(Slab + 1, Slab->Size - sizeof(MemSlab));
memset(Slab + 1, 0xCD, Slab->Size - sizeof(MemSlab));
#endif
Allocator.Deallocate(Slab);