Import chromium-63.0.3239.132

base/allocator/allocator_interception_mac.h

@@ -0,0 +1,56 @@
+// 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 <stddef.h>
+
+#include "base/base_export.h"
+#include "third_party/apple_apsl/malloc.h"
+
+namespace base {
+namespace allocator {
+
+struct MallocZoneFunctions;
+
+// Saves the function pointers currently used by the default zone.
+void StoreFunctionsForDefaultZone();
+
+// Same as StoreFunctionsForDefaultZone, but for all malloc zones.
+void StoreFunctionsForAllZones();
+
+// For all malloc zones that have been stored, replace their functions with
+// |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();
+
+// Updates all malloc zones to use their original functions.
+// Also calls ClearAllMallocZonesForTesting.
+BASE_EXPORT void UninterceptMallocZonesForTesting();
+
+// Periodically checks for, and shims new malloc zones. Stops checking after 1
+// minute.
+BASE_EXPORT void PeriodicallyShimNewMallocZones();
+
+// Exposed for testing.
+BASE_EXPORT void ShimNewMallocZones();
+BASE_EXPORT void ReplaceZoneFunctions(ChromeMallocZone* zone,
+                                      const MallocZoneFunctions* functions);
+
+}  // namespace allocator
+}  // namespace base
+
+#endif  // BASE_ALLOCATOR_ALLOCATOR_INTERCEPTION_MAC_H_