Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h

 // Copyright (c) 2011, 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 35 matching lines @@
 #ifndef __THROW    // I guess we're not on a glibc-like system
 # define __THROW   // __THROW is just an optimization, so ok to make it ""
 #endif
 
 #ifndef __GNUC__
 # error libc_override_gcc_and_weak.h is for gcc distributions only.
 #endif
 
 #define ALIAS(tc_fn)   __attribute__ ((alias (#tc_fn)))
 
-void* operator new(size_t size) throw (std::bad_alloc)
+void* operator new(size_t size) throw (/* std::bad_alloc */)

[Peter Beverloo, 2013/04/29 17:03:31]

It would be helpful to add a comment as to why these have to be commented out (I
suspect Bionic doesn't throw?)

[bulach, 2013/04/30 18:43:08]

Done.

     ALIAS(tc_new);
 void operator delete(void* p) __THROW
     ALIAS(tc_delete);
-void* operator new[](size_t size) throw (std::bad_alloc)
+void* operator new[](size_t size) throw (/* std::bad_alloc */)
     ALIAS(tc_newarray);
 void operator delete[](void* p) __THROW
     ALIAS(tc_deletearray);
 void* operator new(size_t size, const std::nothrow_t& nt) __THROW
     ALIAS(tc_new_nothrow);
 void* operator new[](size_t size, const std::nothrow_t& nt) __THROW
     ALIAS(tc_newarray_nothrow);
 void operator delete(void* p, const std::nothrow_t& nt) __THROW
     ALIAS(tc_delete_nothrow);
 void operator delete[](void* p, const std::nothrow_t& nt) __THROW
@@ skipping 19 matching lines @@
   size_t malloc_usable_size(void* p) __THROW      ALIAS(tc_malloc_size);
 }   // extern "C"
 
 #undef ALIAS
 
 // No need to do anything at tcmalloc-registration time: we do it all
 // via overriding weak symbols (at link time).
 static void ReplaceSystemAlloc() { }
 
 #endif  // TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_