roll clang 148039:148911

chrome/common/mac/objc_zombie.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/common/mac/objc_zombie.h"
 
 #include <dlfcn.h>
 #include <execinfo.h>
 #include <mach-o/dyld.h>
 #include <mach-o/nlist.h>
@@ skipping 181 matching lines @@
   (*g_objectDestruct)(self);
   memset(self, '!', size);
 
   // If the instance is big enough, make it into a fat zombie and have
   // it remember the old |isa|.  Otherwise make it a regular zombie.
   // Setting |isa| rather than using |object_setClass()| because that
   // function is implemented with a memory barrier.  The runtime's
   // |_internal_object_dispose()| (in objc-class.m) does this, so it
   // should be safe (messaging free'd objects shouldn't be expected to
   // be thread-safe in the first place).
+#pragma clang diagnostic push  // clang warns about direct access to isa.
+#pragma clang diagnostic ignored "-Wdeprecated-objc-isa-usage"
   if (size >= g_fatZombieSize) {
     self->isa = g_fatZombieClass;
     static_cast<CrFatZombie*>(self)->wasa = wasa;
   } else {
     self->isa = g_zombieClass;
   }
+#pragma clang diagnostic pop
 
   // The new record to swap into |g_zombies|.  If |g_zombieCount| is
   // zero, then |self| will be freed immediately.
   ZombieRecord zombieToFree = {self, wasa};
   zombieToFree.traceDepth =
       std::max(backtrace(zombieToFree.trace, kBacktraceDepth), 0);
 
   // Don't involve the lock when creating zombies without a treadmill.
   if (g_zombieCount > 0) {
     base::AutoLock pin(g_lock.Get());
@@ skipping 335 matching lines @@
   if (oldZombies) {
     for (size_t i = 0; i < oldCount; ++i) {
       if (oldZombies[i].object)
         object_dispose(oldZombies[i].object);
     }
     free(oldZombies);
   }
 }
 
 }  // namespace ObjcEvilDoers