implemented (disabled by default) sized delete support

gcc 5 and clang++-3.7 support sized deallocation from C++14. We are
taking advantage of that by defining sized versions of operator delete.

This is off by default so that if some existing programs that define own
global operator delete without sized variant are not broken by
tcmalloc's sized delete operator.

There is also risk of breaking exiting code that deletes objects using
wrong class (i.e. base class) without having virtual destructors.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/libc_override_gcc_and_weak.h b/src/libc_override_gcc_and_weak.h
index 818e43d..5c0def2 100644
--- a/src/libc_override_gcc_and_weak.h
+++ b/src/libc_override_gcc_and_weak.h
@@ -71,6 +71,13 @@ void operator delete(void* p, const std::nothrow_t& nt) __THROW
 void operator delete[](void* p, const std::nothrow_t& nt) __THROW
     ALIAS(tc_deletearray_nothrow);
 
+#ifdef ENABLE_SIZED_DELETE
+void operator delete(void *p, size_t size) throw()
+    ALIAS(tc_delete_sized);
+void operator delete[](void *p, size_t size) throw()
+    ALIAS(tc_deletearray_sized);
+#endif
+
 extern "C" {
   void* malloc(size_t size) __THROW               ALIAS(tc_malloc);
   void free(void* ptr) __THROW                    ALIAS(tc_free);