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/*
* Copyright (C) 2011 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.
*/
#pragma once
#include "ParserModes.h"
#include "ParserTokens.h"
#include <wtf/Vector.h>
#include <wtf/text/UniquedStringImpl.h>
#include <wtf/text/WTFString.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
struct SourceProviderCacheItemCreationParameters {
unsigned lastTokenLine { 0 };
unsigned lastTokenStartOffset { 0 };
unsigned lastTokenEndOffset { 0 };
unsigned lastTokenLineStartOffset { 0 };
unsigned endFunctionOffset { 0 };
unsigned parameterCount { 0 };
LexicallyScopedFeatures lexicallyScopedFeatures { 0 };
InnerArrowFunctionCodeFeatures innerArrowFunctionFeatures { 0 };
Vector<UniquedStringImpl*, 8> usedVariables;
JSTokenType tokenType { CLOSEBRACE };
ConstructorKind constructorKind;
SuperBinding expectedSuperBinding;
bool needsFullActivation : 1 { false };
bool usesEval : 1 { false };
bool usesImportMeta : 1 { false };
bool needsSuperBinding : 1 { false };
bool isBodyArrowExpression : 1 { false };
};
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(SourceProviderCacheItem);
class SourceProviderCacheItem {
WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(SourceProviderCacheItem);
public:
static std::unique_ptr<SourceProviderCacheItem> create(const SourceProviderCacheItemCreationParameters&);
~SourceProviderCacheItem();
JSToken endFunctionToken() const
{
JSToken token;
token.m_type = isBodyArrowExpression ? static_cast<JSTokenType>(tokenType) : CLOSEBRACE;
token.m_data.offset = lastTokenStartOffset;
token.m_location.startOffset = lastTokenStartOffset;
token.m_location.endOffset = lastTokenEndOffset;
token.m_location.line = lastTokenLine;
token.m_location.lineStartOffset = lastTokenLineStartOffset;
// token.m_location.sourceOffset is initialized once by the client. So,
// we do not need to set it here.
return token;
}
LexicallyScopedFeatures lexicallyScopedFeatures() const
{
LexicallyScopedFeatures features = NoLexicallyScopedFeatures;
if (strictMode)
features |= StrictModeLexicallyScopedFeature;
if (taintedByWithScope)
features |= TaintedByWithScopeLexicallyScopedFeature;
return features;
}
bool needsFullActivation : 1;
unsigned endFunctionOffset : 31;
bool usesEval : 1;
unsigned lastTokenLine : 31;
bool strictMode : 1;
unsigned lastTokenStartOffset : 31;
unsigned expectedSuperBinding : 1; // SuperBinding
unsigned lastTokenEndOffset: 31;
bool needsSuperBinding: 1;
unsigned parameterCount : 31;
bool taintedByWithScope : 1;
unsigned lastTokenLineStartOffset : 31;
bool isBodyArrowExpression : 1;
unsigned usedVariablesCount;
unsigned tokenType : 24; // JSTokenType
unsigned innerArrowFunctionFeatures : 6; // InnerArrowFunctionCodeFeatures
unsigned constructorKind : 2; // ConstructorKind
bool usesImportMeta : 1 { false };
PackedPtr<UniquedStringImpl>* usedVariables() const { return const_cast<PackedPtr<UniquedStringImpl>*>(m_variables); }
private:
SourceProviderCacheItem(const SourceProviderCacheItemCreationParameters&);
PackedPtr<UniquedStringImpl> m_variables[0];
};
inline SourceProviderCacheItem::~SourceProviderCacheItem()
{
for (unsigned i = 0; i < usedVariablesCount; ++i)
m_variables[i]->deref();
}
inline std::unique_ptr<SourceProviderCacheItem> SourceProviderCacheItem::create(const SourceProviderCacheItemCreationParameters& parameters)
{
size_t variableCount = parameters.usedVariables.size();
size_t objectSize = sizeof(SourceProviderCacheItem) + sizeof(UniquedStringImpl*) * variableCount;
void* slot = SourceProviderCacheItemMalloc::malloc(objectSize);
return std::unique_ptr<SourceProviderCacheItem>(new (slot) SourceProviderCacheItem(parameters));
}
inline SourceProviderCacheItem::SourceProviderCacheItem(const SourceProviderCacheItemCreationParameters& parameters)
: needsFullActivation(parameters.needsFullActivation)
, endFunctionOffset(parameters.endFunctionOffset)
, usesEval(parameters.usesEval)
, lastTokenLine(parameters.lastTokenLine)
, strictMode(parameters.lexicallyScopedFeatures & StrictModeLexicallyScopedFeature)
, lastTokenStartOffset(parameters.lastTokenStartOffset)
, expectedSuperBinding(static_cast<unsigned>(parameters.expectedSuperBinding))
, lastTokenEndOffset(parameters.lastTokenEndOffset)
, needsSuperBinding(parameters.needsSuperBinding)
, parameterCount(parameters.parameterCount)
, taintedByWithScope(parameters.lexicallyScopedFeatures & TaintedByWithScopeLexicallyScopedFeature)
, lastTokenLineStartOffset(parameters.lastTokenLineStartOffset)
, isBodyArrowExpression(parameters.isBodyArrowExpression)
, usedVariablesCount(parameters.usedVariables.size())
, tokenType(static_cast<unsigned>(parameters.tokenType))
, innerArrowFunctionFeatures(static_cast<unsigned>(parameters.innerArrowFunctionFeatures))
, constructorKind(static_cast<unsigned>(parameters.constructorKind))
, usesImportMeta(parameters.usesImportMeta)
{
ASSERT(tokenType == static_cast<unsigned>(parameters.tokenType));
ASSERT(innerArrowFunctionFeatures == static_cast<unsigned>(parameters.innerArrowFunctionFeatures));
ASSERT(constructorKind == static_cast<unsigned>(parameters.constructorKind));
ASSERT(expectedSuperBinding == static_cast<unsigned>(parameters.expectedSuperBinding));
for (unsigned i = 0; i < usedVariablesCount; ++i) {
auto* pointer = parameters.usedVariables[i];
pointer->ref();
m_variables[i] = pointer;
}
}
} // namespace JSC
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
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