| /* |
| * Copyright (C) 2011-2021 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); |
| } |
| } |
| |
| template<typename Visitor> |
| void HandleSet::visitStrongHandles(Visitor& visitor) |
| { |
| for (Node& node : m_strongList) { |
| #if ENABLE(GC_VALIDATION) |
| RELEASE_ASSERT(isLiveNode(&node)); |
| #endif |
| visitor.appendUnbarriered(*node.slot()); |
| } |
| } |
| |
| template void HandleSet::visitStrongHandles(AbstractSlotVisitor&); |
| template void HandleSet::visitStrongHandles(SlotVisitor&); |
| |
| unsigned HandleSet::protectedGlobalObjectCount() |
| { |
| unsigned count = 0; |
| for (Node& node : m_strongList) { |
| 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 |