src/share/vm/memory/allocation.inline.hpp

@@ -266,6 +266,31 @@
       free_mmap(addr, length);
     }
   }
 }
 
+template <class E, MEMFLAGS F> void* CMmapObj<E,F>::operator new(size_t size) {
+  int alignment = os::vm_allocation_granularity();
+
+  int pages = (int)(size / os::vm_page_size());
+  if (pages == 0 || size % (pages * os::vm_page_size()) != 0) pages++;
+  size_t mmap_size = pages * os::vm_page_size();
+
+  char* addr = os::reserve_memory(mmap_size, NULL, alignment, F);
+  if (addr == NULL) {
+    vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "VTBuffer (reserve)");
+  }
+
+  os::commit_memory_or_exit(addr, mmap_size, !ExecMem, "VTBuffer (commit)");
+
+  return addr;
+}
+
+template <class E, MEMFLAGS F> void CMmapObj<E, F>::operator delete(void* addr, size_t length) {
+  int pages = (int)(length / os::vm_page_size());
+  if (pages == 0 || length % (pages * os::vm_page_size()) != 0) pages++;
+  size_t mmap_size = pages * os::vm_page_size();
+  bool result = os::release_memory((char*)addr, mmap_size);
+  assert(result, "Failed to release memory");
+}
+
 #endif // SHARE_VM_MEMORY_ALLOCATION_INLINE_HPP