base/allocator/partition_allocator/partition_alloc.cc - Issue 2518253002: Move Partition Allocator into Chromium base.

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Issue 2518253002: Move Partition Allocator into Chromium base. (Closed)

Patch Set: Respond to comments. Created 4 years ago

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Index: base/allocator/partition_allocator/partition_alloc.cc

diff --git a/third_party/WebKit/Source/wtf/allocator/PartitionAlloc.cpp b/base/allocator/partition_allocator/partition_alloc.cc

similarity index 84%

rename from third_party/WebKit/Source/wtf/allocator/PartitionAlloc.cpp

rename to base/allocator/partition_allocator/partition_alloc.cc

index 03978e8dbf71cb00773a73344bef6142a302f255..2db7ae1123d2bf5e1cbe11377622b0cc7608fe75 100644

--- a/third_party/WebKit/Source/wtf/allocator/PartitionAlloc.cpp

+++ b/base/allocator/partition_allocator/partition_alloc.cc

@@ -1,72 +1,45 @@

-/*

- *

- * 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

- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

- */

-#include "wtf/allocator/PartitionAlloc.h"

+// Use of this source code is governed by a BSD-style license that can be

+// found in the LICENSE file.

+#include "base/allocator/partition_allocator/partition_alloc.h"

#include <string.h>

-#ifndef NDEBUG

-#include <stdio.h>

-#endif

+#include "base/compiler_specific.h"

+#include "base/synchronization/spin_lock.h"

// Two partition pages are used as guard / metadata page so make sure the super

// page size is bigger.

-static_assert(WTF::kPartitionPageSize * 4 <= WTF::kSuperPageSize,

+static_assert(base::kPartitionPageSize * 4 <= base::kSuperPageSize,

"ok super page size");

-static_assert(!(WTF::kSuperPageSize % WTF::kPartitionPageSize),

+static_assert(!(base::kSuperPageSize % base::kPartitionPageSize),

"ok super page multiple");

// Four system pages gives us room to hack out a still-guard-paged piece

// of metadata in the middle of a guard partition page.

-static_assert(WTF::kSystemPageSize * 4 <= WTF::kPartitionPageSize,

+static_assert(base::kSystemPageSize * 4 <= base::kPartitionPageSize,

"ok partition page size");

-static_assert(!(WTF::kPartitionPageSize % WTF::kSystemPageSize),

+static_assert(!(base::kPartitionPageSize % base::kSystemPageSize),

"ok partition page multiple");

-static_assert(sizeof(WTF::PartitionPage) <= WTF::kPageMetadataSize,

+static_assert(sizeof(base::PartitionPage) <= base::kPageMetadataSize,

"PartitionPage should not be too big");

-static_assert(sizeof(WTF::PartitionBucket) <= WTF::kPageMetadataSize,

+static_assert(sizeof(base::PartitionBucket) <= base::kPageMetadataSize,

"PartitionBucket should not be too big");

-static_assert(sizeof(WTF::PartitionSuperPageExtentEntry) <=

- WTF::kPageMetadataSize,

+static_assert(sizeof(base::PartitionSuperPageExtentEntry) <=

+ base::kPageMetadataSize,

"PartitionSuperPageExtentEntry should not be too big");

-static_assert(WTF::kPageMetadataSize * WTF::kNumPartitionPagesPerSuperPage <=

- WTF::kSystemPageSize,

+static_assert(base::kPageMetadataSize * base::kNumPartitionPagesPerSuperPage <=

+ base::kSystemPageSize,

"page metadata fits in hole");

// Check that some of our zanier calculations worked out as expected.

-static_assert(WTF::kGenericSmallestBucket == 8, "generic smallest bucket");

-static_assert(WTF::kGenericMaxBucketed == 983040, "generic max bucketed");

-static_assert(WTF::kMaxSystemPagesPerSlotSpan < (1 << 8),

+static_assert(base::kGenericSmallestBucket == 8, "generic smallest bucket");

+static_assert(base::kGenericMaxBucketed == 983040, "generic max bucketed");

+static_assert(base::kMaxSystemPagesPerSlotSpan < (1 << 8),

"System pages per slot span must be less than 128.");

-namespace WTF {

+namespace base {

-SpinLock PartitionRootBase::gInitializedLock;

+subtle::SpinLock PartitionRootBase::gInitializedLock;

bool PartitionRootBase::gInitialized = false;

PartitionPage PartitionRootBase::gSeedPage;

PartitionBucket PartitionRootBase::gPagedBucket;

@@ -89,12 +62,12 @@ static uint8_t partitionBucketNumSystemPages(size_t size) {

double bestWasteRatio = 1.0f;

uint16_t bestPages = 0;

if (size > kMaxSystemPagesPerSlotSpan * kSystemPageSize) {

- ASSERT(!(size % kSystemPageSize));

+ DCHECK(!(size % kSystemPageSize));

bestPages = static_cast<uint16_t>(size / kSystemPageSize);

- RELEASE_ASSERT(bestPages < (1 << 8));

+ CHECK(bestPages < (1 << 8));

return static_cast<uint8_t>(bestPages);

}

- ASSERT(size <= kMaxSystemPagesPerSlotSpan * kSystemPageSize);

+ DCHECK(size <= kMaxSystemPagesPerSlotSpan * kSystemPageSize);

for (uint16_t i = kNumSystemPagesPerPartitionPage - 1;

i <= kMaxSystemPagesPerSlotSpan; ++i) {

size_t pageSize = kSystemPageSize * i;

@@ -114,15 +87,15 @@ static uint8_t partitionBucketNumSystemPages(size_t size) {

bestPages = i;

}

- ASSERT(bestPages > 0);

- RELEASE_ASSERT(bestPages <= kMaxSystemPagesPerSlotSpan);

+ DCHECK(bestPages > 0);

+ CHECK(bestPages <= kMaxSystemPagesPerSlotSpan);

return static_cast<uint8_t>(bestPages);

}

static void partitionAllocBaseInit(PartitionRootBase* root) {

- ASSERT(!root->initialized);

+ DCHECK(!root->initialized);

{

- SpinLock::Guard guard(PartitionRootBase::gInitializedLock);

+ subtle::SpinLock::Guard guard(PartitionRootBase::gInitializedLock);

if (!PartitionRootBase::gInitialized) {

PartitionRootBase::gInitialized = true;

// We mark the seed page as free to make sure it is skipped by our

@@ -161,7 +134,7 @@ static void partitionBucketInitBase(PartitionBucket* bucket,

}

void partitionAllocGlobalInit(void (*oomHandlingFunction)()) {

- ASSERT(oomHandlingFunction);

+ DCHECK(oomHandlingFunction);

PartitionRootBase::gOomHandlingFunction = oomHandlingFunction;

}

@@ -184,7 +157,7 @@ void partitionAllocInit(PartitionRoot* root,

}

void partitionAllocGenericInit(PartitionRootGeneric* root) {

- SpinLock::Guard guard(root->lock);

+ subtle::SpinLock::Guard guard(root->lock);

partitionAllocBaseInit(root);

@@ -237,8 +210,8 @@ void partitionAllocGenericInit(PartitionRootGeneric* root) {

}

currentIncrement <<= 1;

}

- ASSERT(currentSize == 1 << kGenericMaxBucketedOrder);

- ASSERT(bucket == &root->buckets[0] + kGenericNumBuckets);

+ DCHECK(currentSize == 1 << kGenericMaxBucketedOrder);

+ DCHECK(bucket == &root->buckets[0] + kGenericNumBuckets);

// Then set up the fast size -> bucket lookup table.

bucket = &root->buckets[0];

@@ -260,8 +233,8 @@ void partitionAllocGenericInit(PartitionRootGeneric* root) {

}

- ASSERT(bucket == &root->buckets[0] + kGenericNumBuckets);

- ASSERT(bucketPtr ==

+ DCHECK(bucket == &root->buckets[0] + kGenericNumBuckets);

+ DCHECK(bucketPtr ==

&root->bucketLookups[0] +

((kBitsPerSizet + 1) * kGenericNumBucketsPerOrder));

// And there's one last bucket lookup that will be hit for e.g. malloc(-1),

@@ -271,7 +244,7 @@ void partitionAllocGenericInit(PartitionRootGeneric* root) {

static bool partitionAllocShutdownBucket(PartitionBucket* bucket) {

// Failure here indicates a memory leak.

- bool foundLeak = bucket->numFullPages;

+ bool foundLeak = bucket->numFullPages != 0;

for (PartitionPage* page = bucket->activePagesHead; page;

page = page->nextPage)

foundLeak |= (page->numAllocatedSlots > 0);

@@ -279,7 +252,7 @@ static bool partitionAllocShutdownBucket(PartitionBucket* bucket) {

}

static bool partitionAllocBaseShutdown(PartitionRootBase* root) {

- ASSERT(root->initialized);

+ DCHECK(root->initialized);

root->initialized = false;

// Now that we've examined all partition pages in all buckets, it's safe

@@ -297,7 +270,7 @@ static bool partitionAllocBaseShutdown(PartitionRootBase* root) {

}

entry = nextEntry;

}

- return root->directMapList;

+ return root->directMapList != nullptr;

}

bool partitionAllocShutdown(PartitionRoot* root) {

@@ -312,7 +285,7 @@ bool partitionAllocShutdown(PartitionRoot* root) {

}

bool partitionAllocGenericShutdown(PartitionRootGeneric* root) {

- SpinLock::Guard guard(root->lock);

+ subtle::SpinLock::Guard guard(root->lock);

bool foundLeak = false;

size_t i;

for (i = 0; i < kGenericNumBuckets; ++i) {

@@ -323,14 +296,14 @@ bool partitionAllocGenericShutdown(PartitionRootGeneric* root) {

return !foundLeak;

}

-#if !CPU(64BIT)

-static NEVER_INLINE void partitionOutOfMemoryWithLotsOfUncommitedPages() {

+#if !defined(ARCH_CPU_64_BITS)

+static NOINLINE void partitionOutOfMemoryWithLotsOfUncommitedPages() {

OOM_CRASH();

}

#endif

-static NEVER_INLINE void partitionOutOfMemory(const PartitionRootBase* root) {

-#if !CPU(64BIT)

+static NOINLINE void partitionOutOfMemory(const PartitionRootBase* root) {

+#if !defined(ARCH_CPU_64_BITS)

// Check whether this OOM is due to a lot of super pages that are allocated

// but not committed, probably due to http://crbug.com/421387.

if (root->totalSizeOfSuperPages + root->totalSizeOfDirectMappedPages -

@@ -344,11 +317,11 @@ static NEVER_INLINE void partitionOutOfMemory(const PartitionRootBase* root) {

OOM_CRASH();

}

-static NEVER_INLINE void partitionExcessiveAllocationSize() {

+static NOINLINE void partitionExcessiveAllocationSize() {

OOM_CRASH();

}

-static NEVER_INLINE void partitionBucketFull() {

+static NOINLINE void partitionBucketFull() {

OOM_CRASH();

}

@@ -358,37 +331,37 @@ static NEVER_INLINE void partitionBucketFull() {

// that were detached from the active list.

static bool ALWAYS_INLINE

partitionPageStateIsActive(const PartitionPage* page) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

- ASSERT(!page->pageOffset);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(!page->pageOffset);

return (page->numAllocatedSlots > 0 &&

(page->freelistHead || page->numUnprovisionedSlots));

}

static bool ALWAYS_INLINE partitionPageStateIsFull(const PartitionPage* page) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

- ASSERT(!page->pageOffset);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(!page->pageOffset);

bool ret = (page->numAllocatedSlots == partitionBucketSlots(page->bucket));

if (ret) {

- ASSERT(!page->freelistHead);

- ASSERT(!page->numUnprovisionedSlots);

+ DCHECK(!page->freelistHead);

+ DCHECK(!page->numUnprovisionedSlots);

}

return ret;

}

static bool ALWAYS_INLINE partitionPageStateIsEmpty(const PartitionPage* page) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

- ASSERT(!page->pageOffset);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(!page->pageOffset);

return (!page->numAllocatedSlots && page->freelistHead);

}

static bool ALWAYS_INLINE

partitionPageStateIsDecommitted(const PartitionPage* page) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

- ASSERT(!page->pageOffset);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(!page->pageOffset);

bool ret = (!page->numAllocatedSlots && !page->freelistHead);

if (ret) {

- ASSERT(!page->numUnprovisionedSlots);

- ASSERT(page->emptyCacheIndex == -1);

+ DCHECK(!page->numUnprovisionedSlots);

+ DCHECK(page->emptyCacheIndex == -1);

}

return ret;

}

@@ -396,14 +369,14 @@ partitionPageStateIsDecommitted(const PartitionPage* page) {

static void partitionIncreaseCommittedPages(PartitionRootBase* root,

size_t len) {

root->totalSizeOfCommittedPages += len;

- ASSERT(root->totalSizeOfCommittedPages <=

+ DCHECK(root->totalSizeOfCommittedPages <=

root->totalSizeOfSuperPages + root->totalSizeOfDirectMappedPages);

}

static void partitionDecreaseCommittedPages(PartitionRootBase* root,

size_t len) {

root->totalSizeOfCommittedPages -= len;

- ASSERT(root->totalSizeOfCommittedPages <=

+ DCHECK(root->totalSizeOfCommittedPages <=

root->totalSizeOfSuperPages + root->totalSizeOfDirectMappedPages);

}

@@ -425,11 +398,11 @@ static ALWAYS_INLINE void* partitionAllocPartitionPages(

PartitionRootBase* root,

int flags,

uint16_t numPartitionPages) {

- ASSERT(!(reinterpret_cast<uintptr_t>(root->nextPartitionPage) %

+ DCHECK(!(reinterpret_cast<uintptr_t>(root->nextPartitionPage) %

kPartitionPageSize));

- ASSERT(!(reinterpret_cast<uintptr_t>(root->nextPartitionPageEnd) %

+ DCHECK(!(reinterpret_cast<uintptr_t>(root->nextPartitionPageEnd) %

kPartitionPageSize));

- ASSERT(numPartitionPages <= kNumPartitionPagesPerSuperPage);

+ DCHECK(numPartitionPages <= kNumPartitionPagesPerSuperPage);

size_t totalSize = kPartitionPageSize * numPartitionPages;

size_t numPartitionPagesLeft =

(root->nextPartitionPageEnd - root->nextPartitionPage) >>

@@ -499,10 +472,10 @@ static ALWAYS_INLINE void* partitionAllocPartitionPages(

bool isNewExtent = (superPage != requestedAddress);

if (UNLIKELY(isNewExtent)) {

if (UNLIKELY(!currentExtent)) {

- ASSERT(!root->firstExtent);

+ DCHECK(!root->firstExtent);

root->firstExtent = latestExtent;

} else {

- ASSERT(currentExtent->superPageBase);

+ DCHECK(currentExtent->superPageBase);

currentExtent->next = latestExtent;

}

root->currentExtent = latestExtent;

@@ -511,9 +484,9 @@ static ALWAYS_INLINE void* partitionAllocPartitionPages(

} else {

// We allocated next to an existing extent so just nudge the size up a

// little.

- ASSERT(currentExtent->superPagesEnd);

+ DCHECK(currentExtent->superPagesEnd);

currentExtent->superPagesEnd += kSuperPageSize;

- ASSERT(ret >= currentExtent->superPageBase &&

+ DCHECK(ret >= currentExtent->superPageBase &&

ret < currentExtent->superPagesEnd);

}

return ret;

@@ -527,10 +500,10 @@ partitionBucketPartitionPages(const PartitionBucket* bucket) {

}

static ALWAYS_INLINE void partitionPageReset(PartitionPage* page) {

- ASSERT(partitionPageStateIsDecommitted(page));

+ DCHECK(partitionPageStateIsDecommitted(page));

page->numUnprovisionedSlots = partitionBucketSlots(page->bucket);

- ASSERT(page->numUnprovisionedSlots);

+ DCHECK(page->numUnprovisionedSlots);

page->nextPage = nullptr;

}

@@ -561,17 +534,17 @@ static ALWAYS_INLINE void partitionPageSetup(PartitionPage* page,

static ALWAYS_INLINE char* partitionPageAllocAndFillFreelist(

PartitionPage* page) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

uint16_t numSlots = page->numUnprovisionedSlots;

- ASSERT(numSlots);

+ DCHECK(numSlots);

PartitionBucket* bucket = page->bucket;

// We should only get here when _every_ slot is either used or unprovisioned.

// (The third state is "on the freelist". If we have a non-empty freelist, we

// should not get here.)

- ASSERT(numSlots + page->numAllocatedSlots == partitionBucketSlots(bucket));

+ DCHECK(numSlots + page->numAllocatedSlots == partitionBucketSlots(bucket));

// Similarly, make explicitly sure that the freelist is empty.

- ASSERT(!page->freelistHead);

- ASSERT(page->numAllocatedSlots >= 0);

+ DCHECK(!page->freelistHead);

+ DCHECK(page->numAllocatedSlots >= 0);

size_t size = bucket->slotSize;

char* base = reinterpret_cast<char*>(partitionPageToPointer(page));

@@ -583,7 +556,7 @@ static ALWAYS_INLINE char* partitionPageAllocAndFillFreelist(

// page containing the "end" of the returned slot, and then allow freelist

// pointers to be written up to the end of that page.

char* subPageLimit = reinterpret_cast<char*>(

- WTF::roundUpToSystemPage(reinterpret_cast<size_t>(firstFreelistPointer)));

+ roundUpToSystemPage(reinterpret_cast<size_t>(firstFreelistPointer)));

char* slotsLimit = returnObject + (size * numSlots);

char* freelistLimit = subPageLimit;

if (UNLIKELY(slotsLimit < freelistLimit))

@@ -604,7 +577,7 @@ static ALWAYS_INLINE char* partitionPageAllocAndFillFreelist(

// We always return an object slot -- that's the +1 below.

// We do not neccessarily create any new freelist entries, because we cross

// sub page boundaries frequently for large bucket sizes.

- ASSERT(numNewFreelistEntries + 1 <= numSlots);

+ DCHECK(numNewFreelistEntries + 1 <= numSlots);

numSlots -= (numNewFreelistEntries + 1);

page->numUnprovisionedSlots = numSlots;

page->numAllocatedSlots++;

@@ -645,9 +618,9 @@ static bool partitionSetNewActivePage(PartitionBucket* bucket) {

for (; page; page = nextPage) {

nextPage = page->nextPage;

- ASSERT(page->bucket == bucket);

- ASSERT(page != bucket->emptyPagesHead);

- ASSERT(page != bucket->decommittedPagesHead);

+ DCHECK(page->bucket == bucket);

+ DCHECK(page != bucket->emptyPagesHead);

+ DCHECK(page != bucket->decommittedPagesHead);

// Deal with empty and decommitted pages.

if (LIKELY(partitionPageStateIsActive(page))) {

@@ -663,7 +636,7 @@ static bool partitionSetNewActivePage(PartitionBucket* bucket) {

page->nextPage = bucket->decommittedPagesHead;

bucket->decommittedPagesHead = page;

} else {

- ASSERT(partitionPageStateIsFull(page));

+ DCHECK(partitionPageStateIsFull(page));

// If we get here, we found a full page. Skip over it too, and also

// tag it as full (via a negative value). We need it tagged so that

// free'ing can tell, and move it back into the active page list.

@@ -684,7 +657,7 @@ static bool partitionSetNewActivePage(PartitionBucket* bucket) {

static ALWAYS_INLINE PartitionDirectMapExtent* partitionPageToDirectMapExtent(

PartitionPage* page) {

- ASSERT(partitionBucketIsDirectMapped(page->bucket));

+ DCHECK(partitionBucketIsDirectMapped(page->bucket));

return reinterpret_cast<PartitionDirectMapExtent*>(

reinterpret_cast<char*>(page) + 3 * kPageMetadataSize);

}

@@ -709,7 +682,7 @@ static ALWAYS_INLINE PartitionPage* partitionDirectMap(PartitionRootBase* root,

// - We add a trailing guard page on 32-bit (on 64-bit we rely on the

// massive address space plus randomization instead).

size_t mapSize = size + kPartitionPageSize;

-#if !CPU(64BIT)

+#if !defined(ARCH_CPU_64_BITS)

mapSize += kSystemPageSize;

#endif

// Round up to the allocation granularity.

@@ -730,7 +703,7 @@ static ALWAYS_INLINE PartitionPage* partitionDirectMap(PartitionRootBase* root,

char* slot = ptr + kPartitionPageSize;

setSystemPagesInaccessible(ptr + (kSystemPageSize * 2),

kPartitionPageSize - (kSystemPageSize * 2));

-#if !CPU(64BIT)

+#if !defined(ARCH_CPU_64_BITS)

setSystemPagesInaccessible(ptr, kSystemPageSize);

setSystemPagesInaccessible(slot + size, kSystemPageSize);

#endif

@@ -740,29 +713,29 @@ static ALWAYS_INLINE PartitionPage* partitionDirectMap(PartitionRootBase* root,

partitionSuperPageToMetadataArea(ptr));

extent->root = root;

// The new structures are all located inside a fresh system page so they

- // will all be zeroed out. These ASSERTs are for documentation.

- ASSERT(!extent->superPageBase);

- ASSERT(!extent->superPagesEnd);

- ASSERT(!extent->next);

+ // will all be zeroed out. These DCHECKs are for documentation.

+ DCHECK(!extent->superPageBase);

+ DCHECK(!extent->superPagesEnd);

+ DCHECK(!extent->next);

PartitionPage* page = partitionPointerToPageNoAlignmentCheck(slot);

PartitionBucket* bucket = reinterpret_cast<PartitionBucket*>(

reinterpret_cast<char*>(page) + (kPageMetadataSize * 2));

- ASSERT(!page->nextPage);

- ASSERT(!page->numAllocatedSlots);

- ASSERT(!page->numUnprovisionedSlots);

- ASSERT(!page->pageOffset);

- ASSERT(!page->emptyCacheIndex);

+ DCHECK(!page->nextPage);

+ DCHECK(!page->numAllocatedSlots);

+ DCHECK(!page->numUnprovisionedSlots);

+ DCHECK(!page->pageOffset);

+ DCHECK(!page->emptyCacheIndex);

page->bucket = bucket;

page->freelistHead = reinterpret_cast<PartitionFreelistEntry*>(slot);

PartitionFreelistEntry* nextEntry =

reinterpret_cast<PartitionFreelistEntry*>(slot);

nextEntry->next = partitionFreelistMask(0);

- ASSERT(!bucket->activePagesHead);

- ASSERT(!bucket->emptyPagesHead);

- ASSERT(!bucket->decommittedPagesHead);

- ASSERT(!bucket->numSystemPagesPerSlotSpan);

- ASSERT(!bucket->numFullPages);

+ DCHECK(!bucket->activePagesHead);

+ DCHECK(!bucket->emptyPagesHead);

+ DCHECK(!bucket->decommittedPagesHead);

+ DCHECK(!bucket->numSystemPagesPerSlotSpan);

+ DCHECK(!bucket->numFullPages);

bucket->slotSize = size;

PartitionDirectMapExtent* mapExtent = partitionPageToDirectMapExtent(page);

@@ -786,13 +759,13 @@ static ALWAYS_INLINE void partitionDirectUnmap(PartitionPage* page) {

// Maintain the doubly-linked list of all direct mappings.

if (extent->prevExtent) {

- ASSERT(extent->prevExtent->nextExtent == extent);

+ DCHECK(extent->prevExtent->nextExtent == extent);

extent->prevExtent->nextExtent = extent->nextExtent;

} else {

root->directMapList = extent->nextExtent;

}

if (extent->nextExtent) {

- ASSERT(extent->nextExtent->prevExtent == extent);

+ DCHECK(extent->nextExtent->prevExtent == extent);

extent->nextExtent->prevExtent = extent->prevExtent;

}

@@ -802,10 +775,10 @@ static ALWAYS_INLINE void partitionDirectUnmap(PartitionPage* page) {

size_t uncommittedPageSize = page->bucket->slotSize + kSystemPageSize;

partitionDecreaseCommittedPages(root, uncommittedPageSize);

- ASSERT(root->totalSizeOfDirectMappedPages >= uncommittedPageSize);

+ DCHECK(root->totalSizeOfDirectMappedPages >= uncommittedPageSize);

root->totalSizeOfDirectMappedPages -= uncommittedPageSize;

- ASSERT(!(unmapSize & kPageAllocationGranularityOffsetMask));

+ DCHECK(!(unmapSize & kPageAllocationGranularityOffsetMask));

char* ptr = reinterpret_cast<char*>(partitionPageToPointer(page));

// Account for the mapping starting a partition page before the actual

@@ -820,7 +793,7 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

size_t size,

PartitionBucket* bucket) {

// The slow path is called when the freelist is empty.

- ASSERT(!bucket->activePagesHead->freelistHead);

+ DCHECK(!bucket->activePagesHead->freelistHead);

PartitionPage* newPage = nullptr;

@@ -830,9 +803,9 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

// branches.

bool returnNull = flags & PartitionAllocReturnNull;

if (UNLIKELY(partitionBucketIsDirectMapped(bucket))) {

- ASSERT(size > kGenericMaxBucketed);

- ASSERT(bucket == &PartitionRootBase::gPagedBucket);

- ASSERT(bucket->activePagesHead == &PartitionRootGeneric::gSeedPage);

+ DCHECK(size > kGenericMaxBucketed);

+ DCHECK(bucket == &PartitionRootBase::gPagedBucket);

+ DCHECK(bucket->activePagesHead == &PartitionRootGeneric::gSeedPage);

if (size > kGenericMaxDirectMapped) {

if (returnNull)

return nullptr;

@@ -842,15 +815,15 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

} else if (LIKELY(partitionSetNewActivePage(bucket))) {

// First, did we find an active page in the active pages list?

newPage = bucket->activePagesHead;

- ASSERT(partitionPageStateIsActive(newPage));

+ DCHECK(partitionPageStateIsActive(newPage));

} else if (LIKELY(bucket->emptyPagesHead != nullptr) ||

LIKELY(bucket->decommittedPagesHead != nullptr)) {

// Second, look in our lists of empty and decommitted pages.

// Check empty pages first, which are preferred, but beware that an

// empty page might have been decommitted.

while (LIKELY((newPage = bucket->emptyPagesHead) != nullptr)) {

- ASSERT(newPage->bucket == bucket);

- ASSERT(partitionPageStateIsEmpty(newPage) ||

+ DCHECK(newPage->bucket == bucket);

+ DCHECK(partitionPageStateIsEmpty(newPage) ||

partitionPageStateIsDecommitted(newPage));

bucket->emptyPagesHead = newPage->nextPage;

// Accept the empty page unless it got decommitted.

@@ -858,21 +831,21 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

newPage->nextPage = nullptr;

break;

}

- ASSERT(partitionPageStateIsDecommitted(newPage));

+ DCHECK(partitionPageStateIsDecommitted(newPage));

newPage->nextPage = bucket->decommittedPagesHead;

bucket->decommittedPagesHead = newPage;

}

if (UNLIKELY(!newPage) && LIKELY(bucket->decommittedPagesHead != nullptr)) {

newPage = bucket->decommittedPagesHead;

- ASSERT(newPage->bucket == bucket);

- ASSERT(partitionPageStateIsDecommitted(newPage));

+ DCHECK(newPage->bucket == bucket);

+ DCHECK(partitionPageStateIsDecommitted(newPage));

bucket->decommittedPagesHead = newPage->nextPage;

void* addr = partitionPageToPointer(newPage);

partitionRecommitSystemPages(root, addr,

partitionBucketBytes(newPage->bucket));

partitionPageReset(newPage);

}

- ASSERT(newPage);

+ DCHECK(newPage);

} else {

// Third. If we get here, we need a brand new page.

uint16_t numPartitionPages = partitionBucketPartitionPages(bucket);

@@ -886,14 +859,14 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

// Bail if we had a memory allocation failure.

if (UNLIKELY(!newPage)) {

- ASSERT(bucket->activePagesHead == &PartitionRootGeneric::gSeedPage);

+ DCHECK(bucket->activePagesHead == &PartitionRootGeneric::gSeedPage);

if (returnNull)

return nullptr;

partitionOutOfMemory(root);

}

bucket = newPage->bucket;

- ASSERT(bucket != &PartitionRootBase::gPagedBucket);

+ DCHECK(bucket != &PartitionRootBase::gPagedBucket);

bucket->activePagesHead = newPage;

partitionPageSetRawSize(newPage, size);

@@ -907,14 +880,14 @@ void* partitionAllocSlowPath(PartitionRootBase* root,

return entry;

}

// Otherwise, we need to build the freelist.

- ASSERT(newPage->numUnprovisionedSlots);

+ DCHECK(newPage->numUnprovisionedSlots);

return partitionPageAllocAndFillFreelist(newPage);

}

static ALWAYS_INLINE void partitionDecommitPage(PartitionRootBase* root,

PartitionPage* page) {

- ASSERT(partitionPageStateIsEmpty(page));

- ASSERT(!partitionBucketIsDirectMapped(page->bucket));

+ DCHECK(partitionPageStateIsEmpty(page));

+ DCHECK(!partitionBucketIsDirectMapped(page->bucket));

void* addr = partitionPageToPointer(page);

partitionDecommitSystemPages(root, addr, partitionBucketBytes(page->bucket));

@@ -926,28 +899,28 @@ static ALWAYS_INLINE void partitionDecommitPage(PartitionRootBase* root,

// 32 bytes in size.

page->freelistHead = 0;

page->numUnprovisionedSlots = 0;

- ASSERT(partitionPageStateIsDecommitted(page));

+ DCHECK(partitionPageStateIsDecommitted(page));

}

static void partitionDecommitPageIfPossible(PartitionRootBase* root,

PartitionPage* page) {

- ASSERT(page->emptyCacheIndex >= 0);

- ASSERT(static_cast<unsigned>(page->emptyCacheIndex) < kMaxFreeableSpans);

- ASSERT(page == root->globalEmptyPageRing[page->emptyCacheIndex]);

+ DCHECK(page->emptyCacheIndex >= 0);

+ DCHECK(static_cast<unsigned>(page->emptyCacheIndex) < kMaxFreeableSpans);

+ DCHECK(page == root->globalEmptyPageRing[page->emptyCacheIndex]);

page->emptyCacheIndex = -1;

if (partitionPageStateIsEmpty(page))

partitionDecommitPage(root, page);

}

static ALWAYS_INLINE void partitionRegisterEmptyPage(PartitionPage* page) {

- ASSERT(partitionPageStateIsEmpty(page));

+ DCHECK(partitionPageStateIsEmpty(page));

PartitionRootBase* root = partitionPageToRoot(page);

// If the page is already registered as empty, give it another life.

if (page->emptyCacheIndex != -1) {

- ASSERT(page->emptyCacheIndex >= 0);

- ASSERT(static_cast<unsigned>(page->emptyCacheIndex) < kMaxFreeableSpans);

- ASSERT(root->globalEmptyPageRing[page->emptyCacheIndex] == page);

+ DCHECK(page->emptyCacheIndex >= 0);

+ DCHECK(static_cast<unsigned>(page->emptyCacheIndex) < kMaxFreeableSpans);

+ DCHECK(root->globalEmptyPageRing[page->emptyCacheIndex] == page);

root->globalEmptyPageRing[page->emptyCacheIndex] = 0;

}

@@ -981,7 +954,7 @@ static void partitionDecommitEmptyPages(PartitionRootBase* root) {

void partitionFreeSlowPath(PartitionPage* page) {

PartitionBucket* bucket = page->bucket;

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

if (LIKELY(page->numAllocatedSlots == 0)) {

// Page became fully unused.

if (UNLIKELY(partitionBucketIsDirectMapped(bucket))) {

@@ -992,27 +965,27 @@ void partitionFreeSlowPath(PartitionPage* page) {

// the empty list as a force towards defragmentation.

if (LIKELY(page == bucket->activePagesHead))

(void)partitionSetNewActivePage(bucket);

- ASSERT(bucket->activePagesHead != page);

+ DCHECK(bucket->activePagesHead != page);

partitionPageSetRawSize(page, 0);

- ASSERT(!partitionPageGetRawSize(page));

+ DCHECK(!partitionPageGetRawSize(page));

partitionRegisterEmptyPage(page);

} else {

- ASSERT(!partitionBucketIsDirectMapped(bucket));

+ DCHECK(!partitionBucketIsDirectMapped(bucket));

// Ensure that the page is full. That's the only valid case if we

// arrive here.

- ASSERT(page->numAllocatedSlots < 0);

+ DCHECK(page->numAllocatedSlots < 0);

// A transition of numAllocatedSlots from 0 to -1 is not legal, and

// likely indicates a double-free.

- SECURITY_CHECK(page->numAllocatedSlots != -1);

+ CHECK(page->numAllocatedSlots != -1);

page->numAllocatedSlots = -page->numAllocatedSlots - 2;

- ASSERT(page->numAllocatedSlots == partitionBucketSlots(bucket) - 1);

+ DCHECK(page->numAllocatedSlots == partitionBucketSlots(bucket) - 1);

// Fully used page became partially used. It must be put back on the

// non-full page list. Also make it the current page to increase the

// chances of it being filled up again. The old current page will be

// the next page.

- ASSERT(!page->nextPage);

+ DCHECK(!page->nextPage);

if (LIKELY(bucket->activePagesHead != &PartitionRootGeneric::gSeedPage))

page->nextPage = bucket->activePagesHead;

bucket->activePagesHead = page;

@@ -1027,7 +1000,7 @@ void partitionFreeSlowPath(PartitionPage* page) {

bool partitionReallocDirectMappedInPlace(PartitionRootGeneric* root,

PartitionPage* page,

size_t rawSize) {

- ASSERT(partitionBucketIsDirectMapped(page->bucket));

+ DCHECK(partitionBucketIsDirectMapped(page->bucket));

rawSize = partitionCookieSizeAdjustAdd(rawSize);

@@ -1061,10 +1034,10 @@ bool partitionReallocDirectMappedInPlace(PartitionRootGeneric* root,

// pages accessible again.

size_t recommitSize = newSize - currentSize;

bool ret = setSystemPagesAccessible(charPtr + currentSize, recommitSize);

- RELEASE_ASSERT(ret);

+ CHECK(ret);

partitionRecommitSystemPages(root, charPtr + currentSize, recommitSize);

-#if ENABLE(ASSERT)

+#if DCHECK_IS_ON()

memset(charPtr + currentSize, kUninitializedByte, recommitSize);

#endif

} else {

@@ -1073,13 +1046,13 @@ bool partitionReallocDirectMappedInPlace(PartitionRootGeneric* root,

return false;

}

-#if ENABLE(ASSERT)

+#if DCHECK_IS_ON()

// Write a new trailing cookie.

partitionCookieWriteValue(charPtr + rawSize - kCookieSize);

#endif

partitionPageSetRawSize(page, rawSize);

- ASSERT(partitionPageGetRawSize(page) == rawSize);

+ DCHECK(partitionPageGetRawSize(page) == rawSize);

page->bucket->slotSize = newSize;

return true;

@@ -1102,7 +1075,7 @@ void* partitionReallocGeneric(PartitionRootGeneric* root,

if (newSize > kGenericMaxDirectMapped)

partitionExcessiveAllocationSize();

- ASSERT(partitionPointerIsValid(partitionCookieFreePointerAdjust(ptr)));

+ DCHECK(partitionPointerIsValid(partitionCookieFreePointerAdjust(ptr)));

PartitionPage* page =

partitionPointerToPage(partitionCookieFreePointerAdjust(ptr));

@@ -1153,8 +1126,7 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

size_t rawSize = partitionPageGetRawSize(const_cast<PartitionPage*>(page));

if (rawSize) {

- uint32_t usedBytes =

- static_cast<uint32_t>(WTF::roundUpToSystemPage(rawSize));

+ uint32_t usedBytes = static_cast<uint32_t>(roundUpToSystemPage(rawSize));

discardableBytes = bucket->slotSize - usedBytes;

if (discardableBytes && discard) {

char* ptr = reinterpret_cast<char*>(partitionPageToPointer(page));

@@ -1166,8 +1138,8 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

const size_t maxSlotCount =

(kPartitionPageSize * kMaxPartitionPagesPerSlotSpan) / kSystemPageSize;

- ASSERT(bucketNumSlots <= maxSlotCount);

- ASSERT(page->numUnprovisionedSlots < bucketNumSlots);

+ DCHECK(bucketNumSlots <= maxSlotCount);

+ DCHECK(page->numUnprovisionedSlots < bucketNumSlots);

size_t numSlots = bucketNumSlots - page->numUnprovisionedSlots;

char slotUsage[maxSlotCount];

size_t lastSlot = static_cast<size_t>(-1);

@@ -1178,7 +1150,7 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

// are not in use.

while (entry) {

size_t slotIndex = (reinterpret_cast<char*>(entry) - ptr) / slotSize;

- ASSERT(slotIndex < numSlots);

+ DCHECK(slotIndex < numSlots);

slotUsage[slotIndex] = 0;

entry = partitionFreelistMask(entry->next);

// If we have a slot where the masked freelist entry is 0, we can

@@ -1196,7 +1168,7 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

while (!slotUsage[numSlots - 1]) {

truncatedSlots++;

numSlots--;

- ASSERT(numSlots);

+ DCHECK(numSlots);

}

// First, do the work of calculating the discardable bytes. Don't actually

// discard anything unless the discard flag was passed in.

@@ -1207,19 +1179,19 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

beginPtr = ptr + (numSlots * slotSize);

endPtr = beginPtr + (slotSize * truncatedSlots);

beginPtr = reinterpret_cast<char*>(

- WTF::roundUpToSystemPage(reinterpret_cast<size_t>(beginPtr)));

+ roundUpToSystemPage(reinterpret_cast<size_t>(beginPtr)));

// We round the end pointer here up and not down because we're at the

// end of a slot span, so we "own" all the way up the page boundary.

endPtr = reinterpret_cast<char*>(

- WTF::roundUpToSystemPage(reinterpret_cast<size_t>(endPtr)));

- ASSERT(endPtr <= ptr + partitionBucketBytes(bucket));

+ roundUpToSystemPage(reinterpret_cast<size_t>(endPtr)));

+ DCHECK(endPtr <= ptr + partitionBucketBytes(bucket));

if (beginPtr < endPtr) {

unprovisionedBytes = endPtr - beginPtr;

discardableBytes += unprovisionedBytes;

}

if (unprovisionedBytes && discard) {

- ASSERT(truncatedSlots > 0);

+ DCHECK(truncatedSlots > 0);

size_t numNewEntries = 0;

page->numUnprovisionedSlots += static_cast<uint16_t>(truncatedSlots);

// Rewrite the freelist.

@@ -1237,7 +1209,7 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

*entryPtr = nullptr;

// The freelist head is stored unmasked.

page->freelistHead = partitionFreelistMask(page->freelistHead);

- ASSERT(numNewEntries == numSlots - page->numAllocatedSlots);

+ DCHECK(numNewEntries == numSlots - page->numAllocatedSlots);

// Discard the memory.

discardSystemPages(beginPtr, unprovisionedBytes);

}

@@ -1257,9 +1229,9 @@ static size_t partitionPurgePage(PartitionPage* page, bool discard) {

if (i != lastSlot)

beginPtr += sizeof(PartitionFreelistEntry);

beginPtr = reinterpret_cast<char*>(

- WTF::roundUpToSystemPage(reinterpret_cast<size_t>(beginPtr)));

+ roundUpToSystemPage(reinterpret_cast<size_t>(beginPtr)));

endPtr = reinterpret_cast<char*>(

- WTF::roundDownToSystemPage(reinterpret_cast<size_t>(endPtr)));

+ roundDownToSystemPage(reinterpret_cast<size_t>(endPtr)));

if (beginPtr < endPtr) {

size_t partialSlotBytes = endPtr - beginPtr;

discardableBytes += partialSlotBytes;

@@ -1274,7 +1246,7 @@ static void partitionPurgeBucket(PartitionBucket* bucket) {

if (bucket->activePagesHead != &PartitionRootGeneric::gSeedPage) {

for (PartitionPage* page = bucket->activePagesHead; page;

page = page->nextPage) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

(void)partitionPurgePage(page, true);

}

@@ -1290,7 +1262,7 @@ void partitionPurgeMemory(PartitionRoot* root, int flags) {

}

void partitionPurgeMemoryGeneric(PartitionRootGeneric* root, int flags) {

- SpinLock::Guard guard(root->lock);

+ subtle::SpinLock::Guard guard(root->lock);

if (flags & PartitionPurgeDecommitEmptyPages)

partitionDecommitEmptyPages(root);

if (flags & PartitionPurgeDiscardUnusedSystemPages) {

@@ -1322,8 +1294,8 @@ static void partitionDumpPageStats(PartitionBucketMemoryStats* statsOut,

(page->numAllocatedSlots * statsOut->bucketSlotSize);

size_t pageBytesResident =

- WTF::roundUpToSystemPage((bucketNumSlots - page->numUnprovisionedSlots) *

- statsOut->bucketSlotSize);

+ roundUpToSystemPage((bucketNumSlots - page->numUnprovisionedSlots) *

+ statsOut->bucketSlotSize);

statsOut->residentBytes += pageBytesResident;

if (partitionPageStateIsEmpty(page)) {

statsOut->decommittableBytes += pageBytesResident;

@@ -1331,14 +1303,14 @@ static void partitionDumpPageStats(PartitionBucketMemoryStats* statsOut,

} else if (partitionPageStateIsFull(page)) {

++statsOut->numFullPages;

} else {

- ASSERT(partitionPageStateIsActive(page));

+ DCHECK(partitionPageStateIsActive(page));

++statsOut->numActivePages;

}

static void partitionDumpBucketStats(PartitionBucketMemoryStats* statsOut,

const PartitionBucket* bucket) {

- ASSERT(!partitionBucketIsDirectMapped(bucket));

+ DCHECK(!partitionBucketIsDirectMapped(bucket));

statsOut->isValid = false;

// If the active page list is empty (== &PartitionRootGeneric::gSeedPage),

// the bucket might still need to be reported if it has a list of empty,

@@ -1361,20 +1333,20 @@ static void partitionDumpBucketStats(PartitionBucketMemoryStats* statsOut,

for (const PartitionPage* page = bucket->emptyPagesHead; page;

page = page->nextPage) {

- ASSERT(partitionPageStateIsEmpty(page) ||

+ DCHECK(partitionPageStateIsEmpty(page) ||

partitionPageStateIsDecommitted(page));

partitionDumpPageStats(statsOut, page);

}

for (const PartitionPage* page = bucket->decommittedPagesHead; page;

page = page->nextPage) {

- ASSERT(partitionPageStateIsDecommitted(page));

+ DCHECK(partitionPageStateIsDecommitted(page));

partitionDumpPageStats(statsOut, page);

}

if (bucket->activePagesHead != &PartitionRootGeneric::gSeedPage) {

for (const PartitionPage* page = bucket->activePagesHead; page;

page = page->nextPage) {

- ASSERT(page != &PartitionRootGeneric::gSeedPage);

+ DCHECK(page != &PartitionRootGeneric::gSeedPage);

partitionDumpPageStats(statsOut, page);

}

@@ -1390,7 +1362,7 @@ void partitionDumpStatsGeneric(PartitionRootGeneric* partition,

size_t numDirectMappedAllocations = 0;

{

- SpinLock::Guard guard(partition->lock);

+ subtle::SpinLock::Guard guard(partition->lock);

for (size_t i = 0; i < kGenericNumBuckets; ++i) {

const PartitionBucket* bucket = &partition->buckets[i];

@@ -1405,7 +1377,7 @@ void partitionDumpStatsGeneric(PartitionRootGeneric* partition,

for (PartitionDirectMapExtent* extent = partition->directMapList; extent;

extent = extent->nextExtent) {

- ASSERT(!extent->nextExtent || extent->nextExtent->prevExtent == extent);

+ DCHECK(!extent->nextExtent || extent->nextExtent->prevExtent == extent);

directMapLengths[numDirectMappedAllocations] = extent->bucket->slotSize;

++numDirectMappedAllocations;

if (numDirectMappedAllocations == kMaxReportableDirectMaps)

@@ -1463,7 +1435,7 @@ void partitionDumpStats(PartitionRoot* partition,

static const size_t kMaxReportableBuckets = 4096 / sizeof(void*);

PartitionBucketMemoryStats memoryStats[kMaxReportableBuckets];

const size_t partitionNumBuckets = partition->numBuckets;

- ASSERT(partitionNumBuckets <= kMaxReportableBuckets);

+ DCHECK(partitionNumBuckets <= kMaxReportableBuckets);

for (size_t i = 0; i < partitionNumBuckets; ++i)

partitionDumpBucketStats(&memoryStats[i], &partition->buckets()[i]);

@@ -1473,7 +1445,7 @@ void partitionDumpStats(PartitionRoot* partition,

PartitionMemoryStats partitionStats = {0};

partitionStats.totalMmappedBytes = partition->totalSizeOfSuperPages;

partitionStats.totalCommittedBytes = partition->totalSizeOfCommittedPages;

- ASSERT(!partition->totalSizeOfDirectMappedPages);

+ DCHECK(!partition->totalSizeOfDirectMappedPages);

for (size_t i = 0; i < partitionNumBuckets; ++i) {

if (memoryStats[i].isValid) {

partitionStats.totalResidentBytes += memoryStats[i].residentBytes;

@@ -1489,4 +1461,4 @@ void partitionDumpStats(PartitionRoot* partition,

partitionStatsDumper->partitionDumpTotals(partitionName, &partitionStats);

}

-} // namespace WTF

+} // namespace base

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