1 files changed, 47 insertions, 0 deletions
diff --git a/base/trace_event/java_heap_dump_provider_android.cc b/base/trace_event/java_heap_dump_provider_android.cc
new file mode 100644
index 0000000000..684f7301cf
--- /dev/null
+++ b/base/trace_event/java_heap_dump_provider_android.cc
@@ -0,0 +1,47 @@
+// Copyright 2015 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.
+
+#include "base/trace_event/java_heap_dump_provider_android.h"
+
+#include "base/android/java_runtime.h"
+#include "base/trace_event/process_memory_dump.h"
+
+namespace base {
+namespace trace_event {
+
+// static
+JavaHeapDumpProvider* JavaHeapDumpProvider::GetInstance() {
+  return Singleton<JavaHeapDumpProvider,
+                   LeakySingletonTraits<JavaHeapDumpProvider>>::get();
+}
+
+JavaHeapDumpProvider::JavaHeapDumpProvider() {
+}
+
+JavaHeapDumpProvider::~JavaHeapDumpProvider() {
+}
+
+// Called at trace dump point time. Creates a snapshot with the memory counters
+// for the current process.
+bool JavaHeapDumpProvider::OnMemoryDump(const MemoryDumpArgs& args,
+                                        ProcessMemoryDump* pmd) {
+  // These numbers come from java.lang.Runtime stats.
+  long total_heap_size = 0;
+  long free_heap_size = 0;
+  android::JavaRuntime::GetMemoryUsage(&total_heap_size, &free_heap_size);
+
+  MemoryAllocatorDump* outer_dump = pmd->CreateAllocatorDump("java_heap");
+  outer_dump->AddScalar(MemoryAllocatorDump::kNameSize,
+                        MemoryAllocatorDump::kUnitsBytes, total_heap_size);
+
+  MemoryAllocatorDump* inner_dump =
+      pmd->CreateAllocatorDump("java_heap/allocated_objects");
+  inner_dump->AddScalar(MemoryAllocatorDump::kNameSize,
+                        MemoryAllocatorDump::kUnitsBytes,
+                        total_heap_size - free_heap_size);
+  return true;
+}
+
+}  // namespace trace_event
+}  // namespace base