1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 6#define BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 7 8#include <stddef.h> // for size_t 9 10#include "base/base_export.h" 11#include "build/build_config.h" 12 13namespace base { 14namespace allocator { 15 16// Callback types for alloc and free. 17using AllocHookFunc = void (*)(const void*, size_t); 18using FreeHookFunc = void (*)(const void*); 19 20// Request that the allocator release any free memory it knows about to the 21// system. 22BASE_EXPORT void ReleaseFreeMemory(); 23 24// Get the named property's |value|. Returns true if the property is known. 25// Returns false if the property is not a valid property name for the current 26// allocator implementation. 27// |name| or |value| cannot be NULL 28BASE_EXPORT bool GetNumericProperty(const char* name, size_t* value); 29 30BASE_EXPORT bool IsHeapProfilerRunning(); 31 32// Register callbacks for alloc and free. Can only store one callback at a time 33// for each of alloc and free. 34BASE_EXPORT void SetHooks(AllocHookFunc alloc_hook, FreeHookFunc free_hook); 35 36// Attempts to unwind the call stack from the current location where this 37// function is being called from. Must be called from a hook function registered 38// by calling SetSingle{Alloc,Free}Hook, directly or indirectly. 39// 40// Arguments: 41// stack: pointer to a pre-allocated array of void*'s. 42// max_stack_size: indicates the size of the array in |stack|. 43// 44// Returns the number of call stack frames stored in |stack|, or 0 if no call 45// stack information is available. 46BASE_EXPORT int GetCallStack(void** stack, int max_stack_size); 47 48} // namespace allocator 49} // namespace base 50 51#endif // BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 52