[Mac] Enable CrZombie for all processes.

chrome/browser/ui/cocoa/objc_zombie_unittest.mm

-// Copyright (c) 2011 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 <Cocoa/Cocoa.h>
-#include <dlfcn.h>
-
-#include "base/logging.h"
-#import "base/memory/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/objc_zombie.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/platform_test.h"
-
-namespace {
-
-// Dynamically look up |objc_setAssociatedObject()|, which isn't
-// available until the 10.6 SDK.
-
-typedef void objc_setAssociatedObjectFn(id object, void *key, id value,
-                                        int policy);
-objc_setAssociatedObjectFn* LookupSetAssociatedObjectFn() {
-  return reinterpret_cast<objc_setAssociatedObjectFn*>(
-      dlsym(RTLD_DEFAULT, "objc_setAssociatedObject"));
-}
-
-}  // namespace
-
-@interface ZombieCxxDestructTest : NSObject
-{
-  scoped_nsobject<id> aRef_;
-}
-- (id)initWith:(id)anObject;
-@end
-
-@implementation ZombieCxxDestructTest
-- (id)initWith:(id)anObject {
-  self = [super init];
-  if (self) {
-    aRef_.reset([anObject retain]);
-  }
-  return self;
-}
-@end
-
-@interface ZombieAssociatedObjectTest : NSObject
-+ (BOOL)supportsAssociatedObjects;
-- (id)initWithAssociatedObject:(id)anObject;
-@end
-
-@implementation ZombieAssociatedObjectTest
-
-+ (BOOL)supportsAssociatedObjects {
-  if (LookupSetAssociatedObjectFn())
-    return YES;
-  return NO;
-}
-
-- (id)initWithAssociatedObject:(id)anObject {
-  self = [super init];
-  if (self) {
-    objc_setAssociatedObjectFn* fn = LookupSetAssociatedObjectFn();
-    if (fn) {
-      // Cribbed from 10.6 <objc/runtime.h>.
-      static const int kObjcAssociationRetain = 01401;
-
-      // The address of the variable itself is the unique key, the
-      // contents don't matter.
-      static char kAssociatedObjectKey = 'x';
-
-      (*fn)(self, &kAssociatedObjectKey, anObject, kObjcAssociationRetain);
-    }
-  }
-  return self;
-}
-
-@end
-
-namespace {
-
-// Verify that the C++ destructors run when the last reference to the
-// object is released.
-// NOTE(shess): To test the negative, comment out the |g_objectDestruct()|
-// call in |ZombieDealloc()|.
-TEST(ObjcZombieTest, CxxDestructors) {
-  scoped_nsobject<id> anObject([[NSObject alloc] init]);
-  EXPECT_EQ(1u, [anObject retainCount]);
-
-  ASSERT_TRUE(ObjcEvilDoers::ZombieEnable(YES, 100));
-
-  scoped_nsobject<ZombieCxxDestructTest> soonInfected(
-      [[ZombieCxxDestructTest alloc] initWith:anObject]);
-  EXPECT_EQ(2u, [anObject retainCount]);
-
-  // When |soonInfected| becomes a zombie, the C++ destructors should
-  // run and release a reference to |anObject|.
-  soonInfected.reset();
-  EXPECT_EQ(1u, [anObject retainCount]);
-
-  // The local reference should remain (C++ destructors aren't re-run).
-  ObjcEvilDoers::ZombieDisable();
-  EXPECT_EQ(1u, [anObject retainCount]);
-}
-
-// Verify that the associated objects are released when the object is
-// released.
-// NOTE(shess): To test the negative, hardcode |g_objectDestruct| to
-// the 10.5 version in |ZombieInit()|, and run this test on 10.6.
-TEST(ObjcZombieTest, AssociatedObjectsReleased) {
-  if (![ZombieAssociatedObjectTest supportsAssociatedObjects]) {
-    LOG(ERROR)
-        << "ObjcZombieTest.AssociatedObjectsReleased not supported on 10.5";
-    return;
-  }
-
-  scoped_nsobject<id> anObject([[NSObject alloc] init]);
-  EXPECT_EQ(1u, [anObject retainCount]);
-
-  ASSERT_TRUE(ObjcEvilDoers::ZombieEnable(YES, 100));
-
-  scoped_nsobject<ZombieAssociatedObjectTest> soonInfected(
-      [[ZombieAssociatedObjectTest alloc] initWithAssociatedObject:anObject]);
-  EXPECT_EQ(2u, [anObject retainCount]);
-
-  // When |soonInfected| becomes a zombie, the associated object
-  // should be released.
-  soonInfected.reset();
-  EXPECT_EQ(1u, [anObject retainCount]);
-
-  // The local reference should remain (associated objects not re-released).
-  ObjcEvilDoers::ZombieDisable();
-  EXPECT_EQ(1u, [anObject retainCount]);
-}
-
-}  // namespace