macOS: Shim all malloc zones.

base/allocator/allocator_interception_mac.h

 // Copyright 2017 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.
 
 #ifndef BASE_ALLOCATOR_ALLOCATOR_INTERCEPTION_MAC_H_
 #define BASE_ALLOCATOR_ALLOCATOR_INTERCEPTION_MAC_H_
 
-#include <malloc/malloc.h>
 #include <stddef.h>
 
 #include "base/base_export.h"
-#include "third_party/apple_apsl/malloc.h"
 
 namespace base {
 namespace allocator {
 
-typedef void* (*malloc_type)(struct _malloc_zone_t* zone, size_t size);
-typedef void* (*calloc_type)(struct _malloc_zone_t* zone,
-                             size_t num_items,
-                             size_t size);
-typedef void* (*valloc_type)(struct _malloc_zone_t* zone, size_t size);
-typedef void (*free_type)(struct _malloc_zone_t* zone, void* ptr);
-typedef void* (*realloc_type)(struct _malloc_zone_t* zone,
-                              void* ptr,
-                              size_t size);
-typedef void* (*memalign_type)(struct _malloc_zone_t* zone,
-                               size_t alignment,
-                               size_t size);
-typedef unsigned (*batch_malloc_type)(struct _malloc_zone_t* zone,
-                                      size_t size,
-                                      void** results,
-                                      unsigned num_requested);
-typedef void (*batch_free_type)(struct _malloc_zone_t* zone,
-                                void** to_be_freed,
-                                unsigned num_to_be_freed);
-typedef void (*free_definite_size_type)(struct _malloc_zone_t* zone,
-                                        void* ptr,
-                                        size_t size);
-typedef size_t (*size_fn_type)(struct _malloc_zone_t* zone, const void* ptr);
+struct MallocZoneFunctions;
 
-struct MallocZoneFunctions {
-  MallocZoneFunctions();
-  malloc_type malloc = nullptr;
-  calloc_type calloc = nullptr;
-  valloc_type valloc = nullptr;
-  free_type free = nullptr;
-  realloc_type realloc = nullptr;
-  memalign_type memalign = nullptr;
-  batch_malloc_type batch_malloc = nullptr;
-  batch_free_type batch_free = nullptr;
-  free_definite_size_type free_definite_size = nullptr;
-  size_fn_type size = nullptr;
-};
+// Saves the function pointers currently used by the default zone.
+void StoreFunctionsForDefaultZone();
 
-// Saves the function pointers currently used by default zone into |functions|.
-void StoreFunctionsForDefaultZone(MallocZoneFunctions* functions);
+// Same as StoreFunctionsForDefaultZone, but for all malloc zones.
+void StoreFunctionsForAllZones();
 
-// Updates the default malloc zone to use the functions specified by
+// For all malloc zones that have been stored, replace their functions with
 // |functions|.
-void ReplaceFunctionsForDefaultZone(const MallocZoneFunctions* functions);
+void ReplaceFunctionsForStoredZones(const MallocZoneFunctions* functions);
 
 extern bool g_replaced_default_zone;
 
 // Calls the original implementation of malloc/calloc prior to interception.
 bool UncheckedMallocMac(size_t size, void** result);
 bool UncheckedCallocMac(size_t num_items, size_t size, void** result);
 
 // Intercepts calls to default and purgeable malloc zones. Intercepts Core
 // Foundation and Objective-C allocations.
 // Has no effect on the default malloc zone if the allocator shim already
 // performs that interception.
 BASE_EXPORT void InterceptAllocationsMac();
 }  // namespace allocator
 }  // namespace base
 
 #endif  // BASE_ALLOCATOR_ALLOCATOR_INTERCEPTION_MAC_H_