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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 #include "base/trace_event/java_heap_dump_provider_android.h"
6 
7 #include "base/android/java_runtime.h"
8 #include "base/trace_event/process_memory_dump.h"
9 
10 namespace base {
11 namespace trace_event {
12 
13 // static
GetInstance()14 JavaHeapDumpProvider* JavaHeapDumpProvider::GetInstance() {
15   return Singleton<JavaHeapDumpProvider,
16                    LeakySingletonTraits<JavaHeapDumpProvider>>::get();
17 }
18 
JavaHeapDumpProvider()19 JavaHeapDumpProvider::JavaHeapDumpProvider() {
20 }
21 
~JavaHeapDumpProvider()22 JavaHeapDumpProvider::~JavaHeapDumpProvider() {
23 }
24 
25 // Called at trace dump point time. Creates a snapshot with the memory counters
26 // for the current process.
OnMemoryDump(const MemoryDumpArgs & args,ProcessMemoryDump * pmd)27 bool JavaHeapDumpProvider::OnMemoryDump(const MemoryDumpArgs& args,
28                                         ProcessMemoryDump* pmd) {
29   // These numbers come from java.lang.Runtime stats.
30   long total_heap_size = 0;
31   long free_heap_size = 0;
32   android::JavaRuntime::GetMemoryUsage(&total_heap_size, &free_heap_size);
33 
34   MemoryAllocatorDump* outer_dump = pmd->CreateAllocatorDump("java_heap");
35   outer_dump->AddScalar(MemoryAllocatorDump::kNameSize,
36                         MemoryAllocatorDump::kUnitsBytes, total_heap_size);
37 
38   MemoryAllocatorDump* inner_dump =
39       pmd->CreateAllocatorDump("java_heap/allocated_objects");
40   inner_dump->AddScalar(MemoryAllocatorDump::kNameSize,
41                         MemoryAllocatorDump::kUnitsBytes,
42                         total_heap_size - free_heap_size);
43   return true;
44 }
45 
46 }  // namespace trace_event
47 }  // namespace base
48