Make possible to check memory allocations inside chromium

third_party/tcmalloc/chromium/src/tcmalloc.cc

 // Copyright (c) 2005, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 251 matching lines @@
       ATTRIBUTE_SECTION(google_malloc);
 
   // Some non-standard extensions that we support.
 
   // This is equivalent to
   //    OS X: malloc_size()
   //    glibc: malloc_usable_size()
   //    Windows: _msize()
   size_t tc_malloc_size(void* p) __THROW
       ATTRIBUTE_SECTION(google_malloc);
+
+  // This does not call the new handler but let the caller
+  // check whether the allocation succeed.
+  void* tc_try_malloc(size_t size) __THROW
+    ATTRIBUTE_SECTION(google_malloc);
 }  // extern "C"
 
 
 // ----------------------- IMPLEMENTATION -------------------------------
 
 static int tc_new_mode = 0;  // See tc_set_new_mode().
 
 // Routines such as free() and realloc() catch some erroneous pointers
 // passed to them, and invoke the below when they do.  (An erroneous pointer
 // won't be caught if it's within a valid span or a stale span for which
@@ skipping 1416 matching lines @@
   size = (size + pagesize - 1) & ~(pagesize - 1);
   void* result = do_memalign_or_cpp_memalign(pagesize, size);
   MallocHook::InvokeNewHook(result, size);
   return result;
 }
 
 extern "C" PERFTOOLS_DLL_DECL void tc_malloc_stats(void) __THROW {
   do_malloc_stats();
 }
 
+extern "C" PERFTOOLS_DLL_DECL void* tc_try_malloc(size_t size) __THROW {
+  return do_malloc(size);
+}
+
 extern "C" PERFTOOLS_DLL_DECL int tc_mallopt(int cmd, int value) __THROW {
   return do_mallopt(cmd, value);
 }
 
 #ifdef HAVE_STRUCT_MALLINFO
 extern "C" PERFTOOLS_DLL_DECL struct mallinfo tc_mallinfo(void) __THROW {
   return do_mallinfo();
 }
 #endif
 
@@ skipping 153 matching lines @@
   *mark = ~allocated_mark;  //  Distinctively not allocated.
 }
 
 static void MarkAllocatedRegion(void* ptr) {
   if (ptr == NULL) return;
   MarkType* mark = GetMarkLocation(ptr);
   *mark = GetMarkValue(ptr, mark);
 }
 
 #endif  // TCMALLOC_VALIDATION