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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "wtf/Partitions.h"
#include "wtf/Alias.h"
#include "wtf/MainThread.h"
#include "wtf/PartitionAllocator.h"
namespace WTF {
const char* const Partitions::kAllocatedObjectPoolName = "partition_alloc/allocated_objects";
SpinLock Partitions::s_initializationLock;
bool Partitions::s_initialized = false;
PartitionAllocatorGeneric Partitions::m_fastMallocAllocator;
PartitionAllocatorGeneric Partitions::m_bufferAllocator;
SizeSpecificPartitionAllocator<3328> Partitions::m_nodeAllocator;
SizeSpecificPartitionAllocator<1024> Partitions::m_layoutAllocator;
HistogramEnumerationFunction Partitions::m_histogramEnumeration = nullptr;
void Partitions::initialize(HistogramEnumerationFunction histogramEnumeration)
{
SpinLock::Guard guard(s_initializationLock);
if (!s_initialized) {
partitionAllocGlobalInit(&Partitions::handleOutOfMemory);
m_fastMallocAllocator.init();
m_bufferAllocator.init();
m_nodeAllocator.init();
m_layoutAllocator.init();
m_histogramEnumeration = histogramEnumeration;
s_initialized = true;
}
}
void Partitions::shutdown()
{
SpinLock::Guard guard(s_initializationLock);
// We could ASSERT here for a memory leak within the partition, but it leads
// to very hard to diagnose ASSERTs, so it's best to leave leak checking for
// the valgrind and heapcheck bots, which run without partitions.
if (s_initialized) {
(void) m_layoutAllocator.shutdown();
(void) m_nodeAllocator.shutdown();
(void) m_bufferAllocator.shutdown();
(void) m_fastMallocAllocator.shutdown();
}
}
void Partitions::decommitFreeableMemory()
{
RELEASE_ASSERT(isMainThread());
if (!s_initialized)
return;
partitionPurgeMemoryGeneric(bufferPartition(), PartitionPurgeDecommitEmptyPages);
partitionPurgeMemoryGeneric(fastMallocPartition(), PartitionPurgeDecommitEmptyPages);
partitionPurgeMemory(nodePartition(), PartitionPurgeDecommitEmptyPages);
partitionPurgeMemory(layoutPartition(), PartitionPurgeDecommitEmptyPages);
}
void Partitions::reportMemoryUsageHistogram()
{
static size_t supportedMaxSizeInMB = 4 * 1024;
static size_t observedMaxSizeInMB = 0;
if (!m_histogramEnumeration)
return;
// We only report the memory in the main thread.
if (!isMainThread())
return;
// +1 is for rounding up the sizeInMB.
size_t sizeInMB = Partitions::totalSizeOfCommittedPages() / 1024 / 1024 + 1;
if (sizeInMB >= supportedMaxSizeInMB)
sizeInMB = supportedMaxSizeInMB - 1;
if (sizeInMB > observedMaxSizeInMB) {
// Send a UseCounter only when we see the highest memory usage
// we've ever seen.
m_histogramEnumeration("PartitionAlloc.CommittedSize", sizeInMB, supportedMaxSizeInMB);
observedMaxSizeInMB = sizeInMB;
}
}
void Partitions::dumpMemoryStats(bool isLightDump, PartitionStatsDumper* partitionStatsDumper)
{
// Object model and rendering partitions are not thread safe and can be
// accessed only on the main thread.
ASSERT(isMainThread());
decommitFreeableMemory();
partitionDumpStatsGeneric(fastMallocPartition(), "fast_malloc", isLightDump, partitionStatsDumper);
partitionDumpStatsGeneric(bufferPartition(), "buffer", isLightDump, partitionStatsDumper);
partitionDumpStats(nodePartition(), "node", isLightDump, partitionStatsDumper);
partitionDumpStats(layoutPartition(), "layout", isLightDump, partitionStatsDumper);
}
static NEVER_INLINE void partitionsOutOfMemoryUsing2G()
{
size_t signature = 2UL * 1024 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing1G()
{
size_t signature = 1UL * 1024 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing512M()
{
size_t signature = 512 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing256M()
{
size_t signature = 256 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing128M()
{
size_t signature = 128 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing64M()
{
size_t signature = 64 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing32M()
{
size_t signature = 32 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsing16M()
{
size_t signature = 16 * 1024 * 1024;
alias(&signature);
IMMEDIATE_CRASH();
}
static NEVER_INLINE void partitionsOutOfMemoryUsingLessThan16M()
{
size_t signature = 16 * 1024 * 1024 - 1;
alias(&signature);
IMMEDIATE_CRASH();
}
void Partitions::handleOutOfMemory()
{
volatile size_t totalUsage = totalSizeOfCommittedPages();
if (totalUsage >= 2UL * 1024 * 1024 * 1024)
partitionsOutOfMemoryUsing2G();
if (totalUsage >= 1UL * 1024 * 1024 * 1024)
partitionsOutOfMemoryUsing1G();
if (totalUsage >= 512 * 1024 * 1024)
partitionsOutOfMemoryUsing512M();
if (totalUsage >= 256 * 1024 * 1024)
partitionsOutOfMemoryUsing256M();
if (totalUsage >= 128 * 1024 * 1024)
partitionsOutOfMemoryUsing128M();
if (totalUsage >= 64 * 1024 * 1024)
partitionsOutOfMemoryUsing64M();
if (totalUsage >= 32 * 1024 * 1024)
partitionsOutOfMemoryUsing32M();
if (totalUsage >= 16 * 1024 * 1024)
partitionsOutOfMemoryUsing16M();
partitionsOutOfMemoryUsingLessThan16M();
}
} // namespace WTF