mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-07 09:21:41 +00:00
116 lines
3.4 KiB
C++
116 lines
3.4 KiB
C++
/*
|
|
* Copyright (C) 2011-2019 Apple 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:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "config.h"
|
|
#include "HandleSet.h"
|
|
|
|
#include "HandleBlock.h"
|
|
#include "HandleBlockInlines.h"
|
|
#include "JSCJSValueInlines.h"
|
|
|
|
namespace JSC {
|
|
|
|
HandleSet::HandleSet(VM& vm)
|
|
: m_vm(vm)
|
|
{
|
|
grow();
|
|
}
|
|
|
|
HandleSet::~HandleSet()
|
|
{
|
|
while (!m_blockList.isEmpty())
|
|
HandleBlock::destroy(m_blockList.removeHead());
|
|
}
|
|
|
|
void HandleSet::grow()
|
|
{
|
|
HandleBlock* newBlock = HandleBlock::create(this);
|
|
m_blockList.append(newBlock);
|
|
|
|
for (int i = newBlock->nodeCapacity() - 1; i >= 0; --i) {
|
|
Node* node = newBlock->nodeAtIndex(i);
|
|
new (NotNull, node) Node;
|
|
m_freeList.push(node);
|
|
}
|
|
}
|
|
|
|
void HandleSet::visitStrongHandles(SlotVisitor& visitor)
|
|
{
|
|
Node* end = m_strongList.end();
|
|
for (Node* node = m_strongList.begin(); node != end; node = node->next()) {
|
|
#if ENABLE(GC_VALIDATION)
|
|
RELEASE_ASSERT(isLiveNode(node));
|
|
#endif
|
|
visitor.appendUnbarriered(*node->slot());
|
|
}
|
|
}
|
|
|
|
void HandleSet::writeBarrier(HandleSlot slot, const JSValue& value)
|
|
{
|
|
if (!value == !*slot && slot->isCell() == value.isCell())
|
|
return;
|
|
|
|
Node* node = toNode(slot);
|
|
#if ENABLE(GC_VALIDATION)
|
|
RELEASE_ASSERT(isLiveNode(node));
|
|
#endif
|
|
SentinelLinkedList<Node>::remove(node);
|
|
if (!value || !value.isCell()) {
|
|
m_immediateList.push(node);
|
|
return;
|
|
}
|
|
|
|
m_strongList.push(node);
|
|
#if ENABLE(GC_VALIDATION)
|
|
RELEASE_ASSERT(isLiveNode(node));
|
|
#endif
|
|
}
|
|
|
|
unsigned HandleSet::protectedGlobalObjectCount()
|
|
{
|
|
unsigned count = 0;
|
|
Node* end = m_strongList.end();
|
|
for (Node* node = m_strongList.begin(); node != end; node = node->next()) {
|
|
JSValue value = *node->slot();
|
|
if (value.isObject() && asObject(value.asCell())->isGlobalObject())
|
|
count++;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
#if ENABLE(GC_VALIDATION) || ASSERT_ENABLED
|
|
bool HandleSet::isLiveNode(Node* node)
|
|
{
|
|
if (node->prev()->next() != node)
|
|
return false;
|
|
if (node->next()->prev() != node)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
#endif // ENABLE(GC_VALIDATION) || ASSERT_ENABLED
|
|
|
|
} // namespace JSC
|