--- a/src/hotspot/share/memory/allocation.cpp	Tue Mar 20 13:40:03 2018 +0530
+++ b/src/hotspot/share/memory/allocation.cpp	Fri Mar 16 19:13:13 2018 +0100
@@ -37,6 +37,39 @@
 #include "services/memTracker.hpp"
 #include "utilities/ostream.hpp"
 
+// allocate using malloc; will fail if no memory available
+char* AllocateHeap(size_t size,
+                   MEMFLAGS flags,
+                   const NativeCallStack& stack,
+                   AllocFailType alloc_failmode /* = AllocFailStrategy::EXIT_OOM*/) {
+  char* p = (char*) os::malloc(size, flags, stack);
+  if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
+    vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "AllocateHeap");
+  }
+  return p;
+}
+
+char* AllocateHeap(size_t size,
+                   MEMFLAGS flags,
+                   AllocFailType alloc_failmode /* = AllocFailStrategy::EXIT_OOM*/) {
+  return AllocateHeap(size, flags, CALLER_PC);
+}
+
+char* ReallocateHeap(char *old,
+                     size_t size,
+                     MEMFLAGS flag,
+                     AllocFailType alloc_failmode) {
+  char* p = (char*) os::realloc(old, size, flag, CALLER_PC);
+  if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
+    vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "ReallocateHeap");
+  }
+  return p;
+}
+
+void FreeHeap(void* p) {
+  os::free(p);
+}
+
 void* MetaspaceObj::_shared_metaspace_base = NULL;
 void* MetaspaceObj::_shared_metaspace_top  = NULL;