added tc_malloc_skip_new_handler

This is port of corresponding chromium change at:
https://codereview.chromium.org/55333002/

Basic idea is that sometimes apps that use tc_set_new_mode in order to
have C++ out-of-memory handler catch OOMs in malloc, need to invoke
usual malloc that returns 0 on OOM.

That new API is exactly for that. It'll always return NULL on OOM even
if tc_new_mode is set to true.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/debugallocation.cc b/src/debugallocation.cc
index b7e72cf..4f03d9c 100644
--- a/src/debugallocation.cc
+++ b/src/debugallocation.cc
@@ -1486,3 +1486,9 @@ extern "C" PERFTOOLS_DLL_DECL struct mallinfo tc_mallinfo(void) __THROW {
 extern "C" PERFTOOLS_DLL_DECL size_t tc_malloc_size(void* ptr) __THROW {
   return MallocExtension::instance()->GetAllocatedSize(ptr);
 }
+
+extern "C" PERFTOOLS_DLL_DECL void* tc_malloc_skip_new_handler(size_t size) __THROW {
+  void* result = DebugAllocate(size, MallocBlock::kMallocType);
+  MallocHook::InvokeNewHook(result, size);
+  return result;
+}