1/*
2 * Copyright 2010 The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "MemoryUsage.h"
28
29#include <v8.h>
30
31// Workaround an issue where malloc_footprint is in malloc.h
32// but is not actually implemented.
33// See: http://code.google.com/p/android/issues/detail?id=34897
34extern "C" size_t dlmalloc_footprint(void);
35
36using namespace WTF;
37
38int MemoryUsage::memoryUsageMb(bool /* forceFresh */)
39{
40    size_t footprint = dlmalloc_footprint() >> 20;
41    v8::HeapStatistics stat;
42    v8::V8::GetHeapStatistics(&stat);
43    unsigned v8Usage = stat.total_heap_size() >> 20;
44    return footprint + v8Usage;
45}
46
47int MemoryUsage::m_lowMemoryUsageMb = 0;
48int MemoryUsage::m_highMemoryUsageMb = 0;
49int MemoryUsage::m_highUsageDeltaMb = 0;
50