1 // Copyright 2015 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_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_ 6 #define BASE_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_ 7 8 #include "base/macros.h" 9 #include "base/memory/singleton.h" 10 #include "base/synchronization/lock.h" 11 #include "base/trace_event/memory_dump_provider.h" 12 #include "build/build_config.h" 13 14 #if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_WIN) || \ 15 (defined(OS_MACOSX) && !defined(OS_IOS)) 16 #define MALLOC_MEMORY_TRACING_SUPPORTED 17 #endif 18 19 namespace base { 20 namespace trace_event { 21 22 // Dump provider which collects process-wide memory stats. 23 class BASE_EXPORT MallocDumpProvider : public MemoryDumpProvider { 24 public: 25 // Name of the allocated_objects dump. Use this to declare suballocator dumps 26 // from other dump providers. 27 static const char kAllocatedObjects[]; 28 29 static MallocDumpProvider* GetInstance(); 30 31 // MemoryDumpProvider implementation. 32 bool OnMemoryDump(const MemoryDumpArgs& args, 33 ProcessMemoryDump* pmd) override; 34 35 // Used by out-of-process heap-profiling. When malloc is profiled by an 36 // external process, that process will be responsible for emitting metrics on 37 // behalf of this one. Thus, MallocDumpProvider should not do anything. 38 void EnableMetrics(); 39 void DisableMetrics(); 40 41 private: 42 friend struct DefaultSingletonTraits<MallocDumpProvider>; 43 44 MallocDumpProvider(); 45 ~MallocDumpProvider() override; 46 47 bool emit_metrics_on_memory_dump_ = true; 48 base::Lock emit_metrics_on_memory_dump_lock_; 49 50 DISALLOW_COPY_AND_ASSIGN(MallocDumpProvider); 51 }; 52 53 } // namespace trace_event 54 } // namespace base 55 56 #endif // BASE_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_ 57