mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-09 18:31:13 +00:00
119 lines
4.1 KiB
C++
119 lines
4.1 KiB
C++
/*
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* Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ParserArena.h"
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#include "CatchScope.h"
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#include "JSBigInt.h"
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#include "JSCInlines.h"
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#include "Nodes.h"
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namespace JSC {
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DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(IdentifierArena);
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DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(ParserArena);
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ParserArena::ParserArena()
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: m_freeableMemory(nullptr)
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, m_freeablePoolEnd(nullptr)
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{
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}
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inline void* ParserArena::freeablePool()
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{
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ASSERT(m_freeablePoolEnd);
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return m_freeablePoolEnd - freeablePoolSize;
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}
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inline void ParserArena::deallocateObjects()
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{
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size_t size = m_deletableObjects.size();
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for (size_t i = 0; i < size; ++i)
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m_deletableObjects[i]->~ParserArenaDeletable();
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if (m_freeablePoolEnd)
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ParserArenaMalloc::free(freeablePool());
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size = m_freeablePools.size();
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for (size_t i = 0; i < size; ++i)
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ParserArenaMalloc::free(m_freeablePools[i]);
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}
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ParserArena::~ParserArena()
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{
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deallocateObjects();
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}
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void ParserArena::allocateFreeablePool()
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{
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if (m_freeablePoolEnd)
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m_freeablePools.append(freeablePool());
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char* pool = static_cast<char*>(ParserArenaMalloc::malloc(freeablePoolSize));
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m_freeableMemory = pool;
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m_freeablePoolEnd = pool + freeablePoolSize;
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ASSERT(freeablePool() == pool);
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}
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const Identifier& IdentifierArena::makeBigIntDecimalIdentifier(VM& vm, const Identifier& identifier, uint8_t radix)
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{
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if (radix == 10)
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return identifier;
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auto scope = DECLARE_CATCH_SCOPE(vm);
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JSValue bigInt = JSBigInt::parseInt(nullptr, vm, identifier.string(), radix, JSBigInt::ErrorParseMode::ThrowExceptions, JSBigInt::ParseIntSign::Unsigned);
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scope.assertNoException();
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// FIXME: We are allocating a JSBigInt just to be able to use
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// JSBigInt::tryGetString when radix is not 10.
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// This creates some GC pressure, but since these identifiers
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// will only be created when BigInt literal is used as a property name,
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// it wont be much problematic, given such cases are very rare.
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// There is a lot of optimizations we can apply here when necessary.
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// https://bugs.webkit.org/show_bug.cgi?id=207627
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JSBigInt* heapBigInt;
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#if USE(BIGINT32)
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if (bigInt.isBigInt32()) {
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heapBigInt = JSBigInt::tryCreateFrom(vm, bigInt.bigInt32AsInt32());
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RELEASE_ASSERT(heapBigInt);
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} else
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#endif
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heapBigInt = bigInt.asHeapBigInt();
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m_identifiers.append(Identifier::fromString(vm, JSBigInt::tryGetString(vm, heapBigInt, 10)));
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return m_identifiers.last();
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}
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const Identifier& IdentifierArena::makePrivateIdentifier(VM& vm, ASCIILiteral prefix, unsigned identifier)
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{
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String symbolName = makeString(prefix, identifier);
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auto symbol = vm.privateSymbolRegistry().symbolForKey(symbolName);
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m_identifiers.append(Identifier::fromUid(symbol));
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return m_identifiers.last();
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}
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}
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