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 13 namespace base { 14 namespace allocator { 15 16 // Callback types for alloc and free. 17 using AllocHookFunc = void (*)(const void*, size_t); 18 using FreeHookFunc = void (*)(const void*); 19 20 // Request that the allocator release any free memory it knows about to the 21 // system. 22 BASE_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 28 BASE_EXPORT bool GetNumericProperty(const char* name, size_t* value); 29 30 BASE_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. 34 BASE_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. 46 BASE_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
