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
34 extern "C" size_t dlmalloc_footprint(void);
35
36 using namespace WTF;
37
memoryUsageMb(bool)38 int 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
47 int MemoryUsage::m_lowMemoryUsageMb = 0;
48 int MemoryUsage::m_highMemoryUsageMb = 0;
49 int MemoryUsage::m_highUsageDeltaMb = 0;
50