/*
- * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
* Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
*
* Redistribution and use in source and binary forms, with or without
#include "EvalCodeCache.h"
#include "Instruction.h"
+#include "JITCode.h"
+#include "JITWriteBarrier.h"
#include "JSGlobalObject.h"
#include "JumpTable.h"
#include "Nodes.h"
-#include "RegExp.h"
+#include "RegExpObject.h"
#include "UString.h"
+#include <wtf/FastAllocBase.h>
+#include <wtf/PassOwnPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include "StructureStubInfo.h"
#endif
+// Register numbers used in bytecode operations have different meaning according to their ranges:
+// 0x80000000-0xFFFFFFFF Negative indices from the CallFrame pointer are entries in the call frame, see RegisterFile.h.
+// 0x00000000-0x3FFFFFFF Forwards indices from the CallFrame pointer are local vars and temporaries with the function's callframe.
+// 0x40000000-0x7FFFFFFF Positive indices from 0x40000000 specify entries in the constant pool on the CodeBlock.
+static const int FirstConstantRegisterIndex = 0x40000000;
+
namespace JSC {
+ enum HasSeenShouldRepatch {
+ hasSeenShouldRepatch
+ };
+
class ExecState;
enum CodeType { GlobalCode, EvalCode, FunctionCode };
+ inline int unmodifiedArgumentsRegister(int argumentsRegister) { return argumentsRegister - 1; }
+
static ALWAYS_INLINE int missingThisObjectMarker() { return std::numeric_limits<int>::max(); }
struct HandlerInfo {
uint32_t target;
uint32_t scopeDepth;
#if ENABLE(JIT)
- void* nativeCode;
-#endif
- };
-
-#if ENABLE(JIT)
- // The code, and the associated pool from which it was allocated.
- struct JITCodeRef {
- void* code;
-#ifndef NDEBUG
- unsigned codeSize;
-#endif
- RefPtr<ExecutablePool> executablePool;
-
- JITCodeRef()
- : code(0)
-#ifndef NDEBUG
- , codeSize(0)
-#endif
- {
- }
-
- JITCodeRef(void* code, PassRefPtr<ExecutablePool> executablePool)
- : code(code)
-#ifndef NDEBUG
- , codeSize(0)
+ CodeLocationLabel nativeCode;
#endif
- , executablePool(executablePool)
- {
- }
};
-#endif
struct ExpressionRangeInfo {
enum {
int32_t lineNumber;
};
- // Both op_construct and op_instanceof require a use of op_get_by_id to get
- // the prototype property from an object. The exception messages for exceptions
- // thrown by these instances op_get_by_id need to reflect this.
- struct GetByIdExceptionInfo {
- unsigned bytecodeOffset : 31;
- bool isOpConstruct : 1;
- };
-
#if ENABLE(JIT)
struct CallLinkInfo {
CallLinkInfo()
- : callReturnLocation(0)
- , hotPathBegin(0)
- , hotPathOther(0)
- , coldPathOther(0)
- , callee(0)
+ : hasSeenShouldRepatch(false)
+ , isCall(false)
{
}
-
- unsigned bytecodeIndex;
- void* callReturnLocation;
- void* hotPathBegin;
- void* hotPathOther;
- void* coldPathOther;
- CodeBlock* callee;
- unsigned position;
-
- void setUnlinked() { callee = 0; }
+
+ CodeLocationNearCall callReturnLocation;
+ CodeLocationDataLabelPtr hotPathBegin;
+ CodeLocationNearCall hotPathOther;
+ JITWriteBarrier<JSFunction> callee;
+ bool hasSeenShouldRepatch : 1;
+ bool isCall : 1;
+
bool isLinked() { return callee; }
+ void unlink()
+ {
+ hasSeenShouldRepatch = false;
+ callee.clear();
+ }
+
+ bool seenOnce()
+ {
+ return hasSeenShouldRepatch;
+ }
+
+ void setSeen()
+ {
+ hasSeenShouldRepatch = true;
+ }
};
- struct FunctionRegisterInfo {
- FunctionRegisterInfo(unsigned bytecodeOffset, int functionRegisterIndex)
- : bytecodeOffset(bytecodeOffset)
- , functionRegisterIndex(functionRegisterIndex)
+ struct MethodCallLinkInfo {
+ MethodCallLinkInfo()
{
}
- unsigned bytecodeOffset;
- int functionRegisterIndex;
+ bool seenOnce()
+ {
+ ASSERT(!cachedStructure);
+ return cachedPrototypeStructure.isFlagged();
+ }
+
+ void setSeen()
+ {
+ ASSERT(!cachedStructure && !cachedPrototypeStructure);
+ // We use the values of cachedStructure & cachedPrototypeStructure to indicate the
+ // current state.
+ // - In the initial state, both are null.
+ // - Once this transition has been taken once, cachedStructure is
+ // null and cachedPrototypeStructure is set to a nun-null value.
+ // - Once the call is linked both structures are set to non-null values.
+ cachedPrototypeStructure.setFlagOnBarrier();
+ }
+
+ CodeLocationCall callReturnLocation;
+ JITWriteBarrier<Structure> cachedStructure;
+ JITWriteBarrier<Structure> cachedPrototypeStructure;
+ // We'd like this to actually be JSFunction, but InternalFunction and JSFunction
+ // don't have a common parent class and we allow specialisation on both
+ JITWriteBarrier<JSObjectWithGlobalObject> cachedFunction;
+ JITWriteBarrier<JSObject> cachedPrototype;
};
struct GlobalResolveInfo {
GlobalResolveInfo(unsigned bytecodeOffset)
- : structure(0)
- , offset(0)
+ : offset(0)
, bytecodeOffset(bytecodeOffset)
{
}
- Structure* structure;
+ WriteBarrier<Structure> structure;
unsigned offset;
unsigned bytecodeOffset;
};
- struct PC {
- PC(ptrdiff_t nativePCOffset, unsigned bytecodeIndex)
- : nativePCOffset(nativePCOffset)
- , bytecodeIndex(bytecodeIndex)
+ // This structure is used to map from a call return location
+ // (given as an offset in bytes into the JIT code) back to
+ // the bytecode index of the corresponding bytecode operation.
+ // This is then used to look up the corresponding handler.
+ struct CallReturnOffsetToBytecodeOffset {
+ CallReturnOffsetToBytecodeOffset(unsigned callReturnOffset, unsigned bytecodeOffset)
+ : callReturnOffset(callReturnOffset)
+ , bytecodeOffset(bytecodeOffset)
{
}
- ptrdiff_t nativePCOffset;
- unsigned bytecodeIndex;
+ unsigned callReturnOffset;
+ unsigned bytecodeOffset;
};
- // valueAtPosition helpers for the binaryChop algorithm below.
+ // valueAtPosition helpers for the binarySearch algorithm.
inline void* getStructureStubInfoReturnLocation(StructureStubInfo* structureStubInfo)
{
- return structureStubInfo->callReturnLocation;
+ return structureStubInfo->callReturnLocation.executableAddress();
}
inline void* getCallLinkInfoReturnLocation(CallLinkInfo* callLinkInfo)
{
- return callLinkInfo->callReturnLocation;
+ return callLinkInfo->callReturnLocation.executableAddress();
}
- inline ptrdiff_t getNativePCOffset(PC* pc)
+ inline void* getMethodCallLinkInfoReturnLocation(MethodCallLinkInfo* methodCallLinkInfo)
{
- return pc->nativePCOffset;
+ return methodCallLinkInfo->callReturnLocation.executableAddress();
}
- // Binary chop algorithm, calls valueAtPosition on pre-sorted elements in array,
- // compares result with key (KeyTypes should be comparable with '--', '<', '>').
- // Optimized for cases where the array contains the key, checked by assertions.
- template<typename ArrayType, typename KeyType, KeyType(*valueAtPosition)(ArrayType*)>
- inline ArrayType* binaryChop(ArrayType* array, size_t size, KeyType key)
+ inline unsigned getCallReturnOffset(CallReturnOffsetToBytecodeOffset* pc)
{
- // The array must contain at least one element (pre-condition, array does conatin key).
- // If the array only contains one element, no need to do the comparison.
- while (size > 1) {
- // Pick an element to check, half way through the array, and read the value.
- int pos = (size - 1) >> 1;
- KeyType val = valueAtPosition(&array[pos]);
-
- // If the key matches, success!
- if (val == key)
- return &array[pos];
- // The item we are looking for is smaller than the item being check; reduce the value of 'size',
- // chopping off the right hand half of the array.
- else if (key < val)
- size = pos;
- // Discard all values in the left hand half of the array, up to and including the item at pos.
- else {
- size -= (pos + 1);
- array += (pos + 1);
- }
-
- // 'size' should never reach zero.
- ASSERT(size);
- }
-
- // If we reach this point we've chopped down to one element, no need to check it matches
- ASSERT(size == 1);
- ASSERT(key == valueAtPosition(&array[0]));
- return &array[0];
+ return pc->callReturnOffset;
}
#endif
class CodeBlock {
+ WTF_MAKE_FAST_ALLOCATED;
friend class JIT;
+ protected:
+ CodeBlock(ScriptExecutable* ownerExecutable, CodeType, JSGlobalObject*, PassRefPtr<SourceProvider>, unsigned sourceOffset, SymbolTable* symbolTable, bool isConstructor);
+
+ WriteBarrier<JSGlobalObject> m_globalObject;
+ Heap* m_heap;
+
public:
- CodeBlock(ScopeNode* ownerNode, CodeType, PassRefPtr<SourceProvider>, unsigned sourceOffset);
- ~CodeBlock();
+ virtual ~CodeBlock();
- void mark();
- void refStructures(Instruction* vPC) const;
- void derefStructures(Instruction* vPC) const;
-#if ENABLE(JIT)
- void unlinkCallers();
-#endif
+ void visitAggregate(SlotVisitor&);
static void dumpStatistics();
void printStructure(const char* name, const Instruction*, int operand) const;
#endif
+ bool isStrictMode() const { return m_isStrictMode; }
+
inline bool isKnownNotImmediate(int index)
{
- if (index == m_thisRegister)
+ if (index == m_thisRegister && !m_isStrictMode)
return true;
if (isConstantRegisterIndex(index))
return false;
}
- ALWAYS_INLINE bool isConstantRegisterIndex(int index)
- {
- return index >= m_numVars && index < m_numVars + m_numConstants;
- }
-
- ALWAYS_INLINE JSValuePtr getConstant(int index)
- {
- return m_constantRegisters[index - m_numVars].getJSValue();
- }
-
ALWAYS_INLINE bool isTemporaryRegisterIndex(int index)
{
- return index >= m_numVars + m_numConstants;
+ return index >= m_numVars;
}
HandlerInfo* handlerForBytecodeOffset(unsigned bytecodeOffset);
- int lineNumberForBytecodeOffset(CallFrame*, unsigned bytecodeOffset);
- int expressionRangeForBytecodeOffset(CallFrame*, unsigned bytecodeOffset, int& divot, int& startOffset, int& endOffset);
- bool getByIdExceptionInfoForBytecodeOffset(CallFrame*, unsigned bytecodeOffset, OpcodeID&);
+ int lineNumberForBytecodeOffset(unsigned bytecodeOffset);
+ void expressionRangeForBytecodeOffset(unsigned bytecodeOffset, int& divot, int& startOffset, int& endOffset);
#if ENABLE(JIT)
- void addCaller(CallLinkInfo* caller)
+
+ StructureStubInfo& getStubInfo(ReturnAddressPtr returnAddress)
{
- caller->callee = this;
- caller->position = m_linkedCallerList.size();
- m_linkedCallerList.append(caller);
+ return *(binarySearch<StructureStubInfo, void*, getStructureStubInfoReturnLocation>(m_structureStubInfos.begin(), m_structureStubInfos.size(), returnAddress.value()));
}
- void removeCaller(CallLinkInfo* caller)
+ CallLinkInfo& getCallLinkInfo(ReturnAddressPtr returnAddress)
{
- unsigned pos = caller->position;
- unsigned lastPos = m_linkedCallerList.size() - 1;
-
- if (pos != lastPos) {
- m_linkedCallerList[pos] = m_linkedCallerList[lastPos];
- m_linkedCallerList[pos]->position = pos;
- }
- m_linkedCallerList.shrink(lastPos);
+ return *(binarySearch<CallLinkInfo, void*, getCallLinkInfoReturnLocation>(m_callLinkInfos.begin(), m_callLinkInfos.size(), returnAddress.value()));
}
- StructureStubInfo& getStubInfo(void* returnAddress)
+ MethodCallLinkInfo& getMethodCallLinkInfo(ReturnAddressPtr returnAddress)
{
- return *(binaryChop<StructureStubInfo, void*, getStructureStubInfoReturnLocation>(m_structureStubInfos.begin(), m_structureStubInfos.size(), returnAddress));
+ return *(binarySearch<MethodCallLinkInfo, void*, getMethodCallLinkInfoReturnLocation>(m_methodCallLinkInfos.begin(), m_methodCallLinkInfos.size(), returnAddress.value()));
}
- CallLinkInfo& getCallLinkInfo(void* returnAddress)
+ unsigned bytecodeOffset(ReturnAddressPtr returnAddress)
{
- return *(binaryChop<CallLinkInfo, void*, getCallLinkInfoReturnLocation>(m_callLinkInfos.begin(), m_callLinkInfos.size(), returnAddress));
+ if (!m_rareData)
+ return 1;
+ Vector<CallReturnOffsetToBytecodeOffset>& callIndices = m_rareData->m_callReturnIndexVector;
+ if (!callIndices.size())
+ return 1;
+ return binarySearch<CallReturnOffsetToBytecodeOffset, unsigned, getCallReturnOffset>(callIndices.begin(), callIndices.size(), getJITCode().offsetOf(returnAddress.value()))->bytecodeOffset;
}
- unsigned getBytecodeIndex(CallFrame* callFrame, void* nativePC)
+ void unlinkCalls();
+#endif
+
+#if ENABLE(INTERPRETER)
+ unsigned bytecodeOffset(Instruction* returnAddress)
{
- reparseForExceptionInfoIfNecessary(callFrame);
- ptrdiff_t nativePCOffset = reinterpret_cast<void**>(nativePC) - reinterpret_cast<void**>(m_jitCode.code);
- return binaryChop<PC, ptrdiff_t, getNativePCOffset>(m_exceptionInfo->m_pcVector.begin(), m_exceptionInfo->m_pcVector.size(), nativePCOffset)->bytecodeIndex;
+ return static_cast<Instruction*>(returnAddress) - instructions().begin();
}
-
- bool functionRegisterForBytecodeOffset(unsigned bytecodeOffset, int& functionRegisterIndex);
#endif
void setIsNumericCompareFunction(bool isNumericCompareFunction) { m_isNumericCompareFunction = isNumericCompareFunction; }
bool isNumericCompareFunction() { return m_isNumericCompareFunction; }
Vector<Instruction>& instructions() { return m_instructions; }
+ void discardBytecode() { m_instructions.clear(); }
+
#ifndef NDEBUG
+ unsigned instructionCount() { return m_instructionCount; }
void setInstructionCount(unsigned instructionCount) { m_instructionCount = instructionCount; }
#endif
#if ENABLE(JIT)
- void setJITCode(JITCodeRef& jitCode);
- void* jitCode() { return m_jitCode.code; }
- ExecutablePool* executablePool() { return m_jitCode.executablePool.get(); }
+ JITCode& getJITCode() { return m_isConstructor ? ownerExecutable()->generatedJITCodeForConstruct() : ownerExecutable()->generatedJITCodeForCall(); }
+ ExecutablePool* executablePool() { return getJITCode().getExecutablePool(); }
#endif
- ScopeNode* ownerNode() const { return m_ownerNode; }
+ ScriptExecutable* ownerExecutable() const { return m_ownerExecutable.get(); }
void setGlobalData(JSGlobalData* globalData) { m_globalData = globalData; }
bool needsFullScopeChain() const { return m_needsFullScopeChain; }
void setUsesEval(bool usesEval) { m_usesEval = usesEval; }
bool usesEval() const { return m_usesEval; }
- void setUsesArguments(bool usesArguments) { m_usesArguments = usesArguments; }
- bool usesArguments() const { return m_usesArguments; }
+
+ void setArgumentsRegister(int argumentsRegister)
+ {
+ ASSERT(argumentsRegister != -1);
+ m_argumentsRegister = argumentsRegister;
+ ASSERT(usesArguments());
+ }
+ int argumentsRegister()
+ {
+ ASSERT(usesArguments());
+ return m_argumentsRegister;
+ }
+ void setActivationRegister(int activationRegister)
+ {
+ m_activationRegister = activationRegister;
+ }
+ int activationRegister()
+ {
+ ASSERT(needsFullScopeChain());
+ return m_activationRegister;
+ }
+ bool usesArguments() const { return m_argumentsRegister != -1; }
CodeType codeType() const { return m_codeType; }
unsigned jumpTarget(int index) const { return m_jumpTargets[index]; }
unsigned lastJumpTarget() const { return m_jumpTargets.last(); }
-#if !ENABLE(JIT)
- void addPropertyAccessInstruction(unsigned propertyAccessInstruction) { m_propertyAccessInstructions.append(propertyAccessInstruction); }
- void addGlobalResolveInstruction(unsigned globalResolveInstruction) { m_globalResolveInstructions.append(globalResolveInstruction); }
+ void createActivation(CallFrame*);
+
+ void clearEvalCache();
+
+#if ENABLE(INTERPRETER)
+ void addPropertyAccessInstruction(unsigned propertyAccessInstruction)
+ {
+ if (!m_globalData->canUseJIT())
+ m_propertyAccessInstructions.append(propertyAccessInstruction);
+ }
+ void addGlobalResolveInstruction(unsigned globalResolveInstruction)
+ {
+ if (!m_globalData->canUseJIT())
+ m_globalResolveInstructions.append(globalResolveInstruction);
+ }
bool hasGlobalResolveInstructionAtBytecodeOffset(unsigned bytecodeOffset);
-#else
+#endif
+#if ENABLE(JIT)
size_t numberOfStructureStubInfos() const { return m_structureStubInfos.size(); }
- void addStructureStubInfo(const StructureStubInfo& stubInfo) { m_structureStubInfos.append(stubInfo); }
+ void addStructureStubInfo(const StructureStubInfo& stubInfo)
+ {
+ if (m_globalData->canUseJIT())
+ m_structureStubInfos.append(stubInfo);
+ }
StructureStubInfo& structureStubInfo(int index) { return m_structureStubInfos[index]; }
- void addGlobalResolveInfo(unsigned globalResolveInstruction) { m_globalResolveInfos.append(GlobalResolveInfo(globalResolveInstruction)); }
+ void addGlobalResolveInfo(unsigned globalResolveInstruction)
+ {
+ if (m_globalData->canUseJIT())
+ m_globalResolveInfos.append(GlobalResolveInfo(globalResolveInstruction));
+ }
GlobalResolveInfo& globalResolveInfo(int index) { return m_globalResolveInfos[index]; }
bool hasGlobalResolveInfoAtBytecodeOffset(unsigned bytecodeOffset);
void addCallLinkInfo() { m_callLinkInfos.append(CallLinkInfo()); }
CallLinkInfo& callLinkInfo(int index) { return m_callLinkInfos[index]; }
- void addFunctionRegisterInfo(unsigned bytecodeOffset, int functionIndex) { createRareDataIfNecessary(); m_rareData->m_functionRegisterInfos.append(FunctionRegisterInfo(bytecodeOffset, functionIndex)); }
+ void addMethodCallLinkInfos(unsigned n) { ASSERT(m_globalData->canUseJIT()); m_methodCallLinkInfos.grow(n); }
+ MethodCallLinkInfo& methodCallLinkInfo(int index) { return m_methodCallLinkInfos[index]; }
#endif
+ unsigned globalResolveInfoCount() const
+ {
+#if ENABLE(JIT)
+ if (m_globalData->canUseJIT())
+ return m_globalResolveInfos.size();
+#endif
+ return 0;
+ }
// Exception handling support
void addExceptionHandler(const HandlerInfo& hanler) { createRareDataIfNecessary(); return m_rareData->m_exceptionHandlers.append(hanler); }
HandlerInfo& exceptionHandler(int index) { ASSERT(m_rareData); return m_rareData->m_exceptionHandlers[index]; }
- bool hasExceptionInfo() const { return m_exceptionInfo; }
- void clearExceptionInfo() { m_exceptionInfo.clear(); }
+ void addExpressionInfo(const ExpressionRangeInfo& expressionInfo)
+ {
+ createRareDataIfNecessary();
+ m_rareData->m_expressionInfo.append(expressionInfo);
+ }
- void addExpressionInfo(const ExpressionRangeInfo& expressionInfo) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_expressionInfo.append(expressionInfo); }
- void addGetByIdExceptionInfo(const GetByIdExceptionInfo& info) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_getByIdExceptionInfo.append(info); }
+ void addLineInfo(unsigned bytecodeOffset, int lineNo)
+ {
+ createRareDataIfNecessary();
+ Vector<LineInfo>& lineInfo = m_rareData->m_lineInfo;
+ if (!lineInfo.size() || lineInfo.last().lineNumber != lineNo) {
+ LineInfo info = { bytecodeOffset, lineNo };
+ lineInfo.append(info);
+ }
+ }
- size_t numberOfLineInfos() const { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_lineInfo.size(); }
- void addLineInfo(const LineInfo& lineInfo) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_lineInfo.append(lineInfo); }
- LineInfo& lastLineInfo() { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_lineInfo.last(); }
+ bool hasExpressionInfo() { return m_rareData && m_rareData->m_expressionInfo.size(); }
+ bool hasLineInfo() { return m_rareData && m_rareData->m_lineInfo.size(); }
+ // We only generate exception handling info if the user is debugging
+ // (and may want line number info), or if the function contains exception handler.
+ bool needsCallReturnIndices()
+ {
+ return m_rareData &&
+ (m_rareData->m_expressionInfo.size() || m_rareData->m_lineInfo.size() || m_rareData->m_exceptionHandlers.size());
+ }
#if ENABLE(JIT)
- Vector<PC>& pcVector() { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_pcVector; }
+ Vector<CallReturnOffsetToBytecodeOffset>& callReturnIndexVector()
+ {
+ createRareDataIfNecessary();
+ return m_rareData->m_callReturnIndexVector;
+ }
#endif
// Constant Pool
Identifier& identifier(int index) { return m_identifiers[index]; }
size_t numberOfConstantRegisters() const { return m_constantRegisters.size(); }
- void addConstantRegister(const Register& r) { return m_constantRegisters.append(r); }
- Register& constantRegister(int index) { return m_constantRegisters[index]; }
-
- unsigned addFunctionExpression(FuncExprNode* n) { unsigned size = m_functionExpressions.size(); m_functionExpressions.append(n); return size; }
- FuncExprNode* functionExpression(int index) const { return m_functionExpressions[index].get(); }
+ void addConstant(JSValue v)
+ {
+ m_constantRegisters.append(WriteBarrier<Unknown>());
+ m_constantRegisters.last().set(m_globalObject->globalData(), m_ownerExecutable.get(), v);
+ }
+ WriteBarrier<Unknown>& constantRegister(int index) { return m_constantRegisters[index - FirstConstantRegisterIndex]; }
+ ALWAYS_INLINE bool isConstantRegisterIndex(int index) const { return index >= FirstConstantRegisterIndex; }
+ ALWAYS_INLINE JSValue getConstant(int index) const { return m_constantRegisters[index - FirstConstantRegisterIndex].get(); }
- unsigned addFunction(FuncDeclNode* n) { createRareDataIfNecessary(); unsigned size = m_rareData->m_functions.size(); m_rareData->m_functions.append(n); return size; }
- FuncDeclNode* function(int index) const { ASSERT(m_rareData); return m_rareData->m_functions[index].get(); }
+ unsigned addFunctionDecl(FunctionExecutable* n)
+ {
+ unsigned size = m_functionDecls.size();
+ m_functionDecls.append(WriteBarrier<FunctionExecutable>());
+ m_functionDecls.last().set(m_globalObject->globalData(), m_ownerExecutable.get(), n);
+ return size;
+ }
+ FunctionExecutable* functionDecl(int index) { return m_functionDecls[index].get(); }
+ int numberOfFunctionDecls() { return m_functionDecls.size(); }
+ unsigned addFunctionExpr(FunctionExecutable* n)
+ {
+ unsigned size = m_functionExprs.size();
+ m_functionExprs.append(WriteBarrier<FunctionExecutable>());
+ m_functionExprs.last().set(m_globalObject->globalData(), m_ownerExecutable.get(), n);
+ return size;
+ }
+ FunctionExecutable* functionExpr(int index) { return m_functionExprs[index].get(); }
- bool hasFunctions() const { return m_functionExpressions.size() || (m_rareData && m_rareData->m_functions.size()); }
+ unsigned addRegExp(RegExp* r)
+ {
+ createRareDataIfNecessary();
+ unsigned size = m_rareData->m_regexps.size();
+ m_rareData->m_regexps.append(WriteBarrier<RegExp>(*m_globalData, ownerExecutable(), r));
+ return size;
+ }
+ RegExp* regexp(int index) const { ASSERT(m_rareData); return m_rareData->m_regexps[index].get(); }
- unsigned addUnexpectedConstant(JSValuePtr v) { createRareDataIfNecessary(); unsigned size = m_rareData->m_unexpectedConstants.size(); m_rareData->m_unexpectedConstants.append(v); return size; }
- JSValuePtr unexpectedConstant(int index) const { ASSERT(m_rareData); return m_rareData->m_unexpectedConstants[index]; }
+ unsigned addConstantBuffer(unsigned length)
+ {
+ createRareDataIfNecessary();
+ unsigned size = m_rareData->m_constantBuffers.size();
+ m_rareData->m_constantBuffers.append(Vector<JSValue>(length));
+ return size;
+ }
- unsigned addRegExp(RegExp* r) { createRareDataIfNecessary(); unsigned size = m_rareData->m_regexps.size(); m_rareData->m_regexps.append(r); return size; }
- RegExp* regexp(int index) const { ASSERT(m_rareData); return m_rareData->m_regexps[index].get(); }
+ JSValue* constantBuffer(unsigned index)
+ {
+ ASSERT(m_rareData);
+ return m_rareData->m_constantBuffers[index].data();
+ }
+ JSGlobalObject* globalObject() { return m_globalObject.get(); }
// Jump Tables
StringJumpTable& stringSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_stringSwitchJumpTables[tableIndex]; }
- SymbolTable& symbolTable() { return m_symbolTable; }
+ SymbolTable* symbolTable() { return m_symbolTable; }
+ SharedSymbolTable* sharedSymbolTable() { ASSERT(m_codeType == FunctionCode); return static_cast<SharedSymbolTable*>(m_symbolTable); }
EvalCodeCache& evalCodeCache() { createRareDataIfNecessary(); return m_rareData->m_evalCodeCache; }
// FIXME: Make these remaining members private.
int m_numCalleeRegisters;
- // NOTE: numConstants holds the number of constant registers allocated
- // by the code generator, not the number of constant registers used.
- // (Duplicate constants are uniqued during code generation, and spare
- // constant registers may be allocated.)
- int m_numConstants;
int m_numVars;
+ int m_numCapturedVars;
int m_numParameters;
+ bool m_isConstructor;
private:
#if !defined(NDEBUG) || ENABLE(OPCODE_SAMPLING)
void dump(ExecState*, const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator&) const;
-#endif
- void reparseForExceptionInfoIfNecessary(CallFrame*);
+ CString registerName(ExecState*, int r) const;
+ void printUnaryOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+ void printBinaryOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+ void printConditionalJump(ExecState*, const Vector<Instruction>::const_iterator&, Vector<Instruction>::const_iterator&, int location, const char* op) const;
+ void printGetByIdOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+ void printPutByIdOp(ExecState*, int location, Vector<Instruction>::const_iterator&, const char* op) const;
+#endif
+ void visitStructures(SlotVisitor&, Instruction* vPC) const;
void createRareDataIfNecessary()
{
if (!m_rareData)
- m_rareData.set(new RareData);
+ m_rareData = adoptPtr(new RareData);
}
- ScopeNode* m_ownerNode;
+ WriteBarrier<ScriptExecutable> m_ownerExecutable;
JSGlobalData* m_globalData;
Vector<Instruction> m_instructions;
#ifndef NDEBUG
unsigned m_instructionCount;
#endif
-#if ENABLE(JIT)
- JITCodeRef m_jitCode;
-#endif
int m_thisRegister;
+ int m_argumentsRegister;
+ int m_activationRegister;
bool m_needsFullScopeChain;
bool m_usesEval;
- bool m_usesArguments;
bool m_isNumericCompareFunction;
+ bool m_isStrictMode;
CodeType m_codeType;
RefPtr<SourceProvider> m_source;
unsigned m_sourceOffset;
-#if !ENABLE(JIT)
+#if ENABLE(INTERPRETER)
Vector<unsigned> m_propertyAccessInstructions;
Vector<unsigned> m_globalResolveInstructions;
-#else
+#endif
+#if ENABLE(JIT)
Vector<StructureStubInfo> m_structureStubInfos;
Vector<GlobalResolveInfo> m_globalResolveInfos;
Vector<CallLinkInfo> m_callLinkInfos;
- Vector<CallLinkInfo*> m_linkedCallerList;
+ Vector<MethodCallLinkInfo> m_methodCallLinkInfos;
#endif
Vector<unsigned> m_jumpTargets;
// Constant Pool
Vector<Identifier> m_identifiers;
- Vector<Register> m_constantRegisters;
- Vector<RefPtr<FuncExprNode> > m_functionExpressions;
-
- SymbolTable m_symbolTable;
+ COMPILE_ASSERT(sizeof(Register) == sizeof(WriteBarrier<Unknown>), Register_must_be_same_size_as_WriteBarrier_Unknown);
+ Vector<WriteBarrier<Unknown> > m_constantRegisters;
+ Vector<WriteBarrier<FunctionExecutable> > m_functionDecls;
+ Vector<WriteBarrier<FunctionExecutable> > m_functionExprs;
- struct ExceptionInfo {
- Vector<ExpressionRangeInfo> m_expressionInfo;
- Vector<LineInfo> m_lineInfo;
- Vector<GetByIdExceptionInfo> m_getByIdExceptionInfo;
-
-#if ENABLE(JIT)
- Vector<PC> m_pcVector;
-#endif
- };
- OwnPtr<ExceptionInfo> m_exceptionInfo;
+ SymbolTable* m_symbolTable;
struct RareData {
+ WTF_MAKE_FAST_ALLOCATED;
+ public:
Vector<HandlerInfo> m_exceptionHandlers;
// Rare Constants
- Vector<RefPtr<FuncDeclNode> > m_functions;
- Vector<JSValuePtr> m_unexpectedConstants;
- Vector<RefPtr<RegExp> > m_regexps;
+ Vector<WriteBarrier<RegExp> > m_regexps;
+ // Buffers used for large array literals
+ Vector<Vector<JSValue> > m_constantBuffers;
+
// Jump Tables
Vector<SimpleJumpTable> m_immediateSwitchJumpTables;
Vector<SimpleJumpTable> m_characterSwitchJumpTables;
EvalCodeCache m_evalCodeCache;
+ // Expression info - present if debugging.
+ Vector<ExpressionRangeInfo> m_expressionInfo;
+ // Line info - present if profiling or debugging.
+ Vector<LineInfo> m_lineInfo;
#if ENABLE(JIT)
- Vector<FunctionRegisterInfo> m_functionRegisterInfos;
+ Vector<CallReturnOffsetToBytecodeOffset> m_callReturnIndexVector;
#endif
};
+#if COMPILER(MSVC)
+ friend void WTF::deleteOwnedPtr<RareData>(RareData*);
+#endif
OwnPtr<RareData> m_rareData;
};
// Program code is not marked by any function, so we make the global object
// responsible for marking it.
- class ProgramCodeBlock : public CodeBlock {
+ class GlobalCodeBlock : public CodeBlock {
public:
- ProgramCodeBlock(ScopeNode* ownerNode, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider)
- : CodeBlock(ownerNode, codeType, sourceProvider, 0)
- , m_globalObject(globalObject)
+ GlobalCodeBlock(ScriptExecutable* ownerExecutable, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, unsigned sourceOffset)
+ : CodeBlock(ownerExecutable, codeType, globalObject, sourceProvider, sourceOffset, &m_unsharedSymbolTable, false)
{
- m_globalObject->codeBlocks().add(this);
}
- ~ProgramCodeBlock()
+ private:
+ SymbolTable m_unsharedSymbolTable;
+ };
+
+ class ProgramCodeBlock : public GlobalCodeBlock {
+ public:
+ ProgramCodeBlock(ProgramExecutable* ownerExecutable, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider)
+ : GlobalCodeBlock(ownerExecutable, codeType, globalObject, sourceProvider, 0)
{
- if (m_globalObject)
- m_globalObject->codeBlocks().remove(this);
}
-
- void clearGlobalObject() { m_globalObject = 0; }
-
- private:
- JSGlobalObject* m_globalObject; // For program and eval nodes, the global object that marks the constant pool.
};
- class EvalCodeBlock : public ProgramCodeBlock {
+ class EvalCodeBlock : public GlobalCodeBlock {
public:
- EvalCodeBlock(ScopeNode* ownerNode, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, int baseScopeDepth)
- : ProgramCodeBlock(ownerNode, EvalCode, globalObject, sourceProvider)
+ EvalCodeBlock(EvalExecutable* ownerExecutable, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, int baseScopeDepth)
+ : GlobalCodeBlock(ownerExecutable, EvalCode, globalObject, sourceProvider, 0)
, m_baseScopeDepth(baseScopeDepth)
{
}
int baseScopeDepth() const { return m_baseScopeDepth; }
+ const Identifier& variable(unsigned index) { return m_variables[index]; }
+ unsigned numVariables() { return m_variables.size(); }
+ void adoptVariables(Vector<Identifier>& variables)
+ {
+ ASSERT(m_variables.isEmpty());
+ m_variables.swap(variables);
+ }
+
private:
int m_baseScopeDepth;
+ Vector<Identifier> m_variables;
};
+ class FunctionCodeBlock : public CodeBlock {
+ public:
+ // Rather than using the usual RefCounted::create idiom for SharedSymbolTable we just use new
+ // as we need to initialise the CodeBlock before we could initialise any RefPtr to hold the shared
+ // symbol table, so we just pass as a raw pointer with a ref count of 1. We then manually deref
+ // in the destructor.
+ FunctionCodeBlock(FunctionExecutable* ownerExecutable, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, unsigned sourceOffset, bool isConstructor)
+ : CodeBlock(ownerExecutable, codeType, globalObject, sourceProvider, sourceOffset, SharedSymbolTable::create().leakRef(), isConstructor)
+ {
+ }
+ ~FunctionCodeBlock()
+ {
+ sharedSymbolTable()->deref();
+ }
+ };
+
+ inline Register& ExecState::r(int index)
+ {
+ CodeBlock* codeBlock = this->codeBlock();
+ if (codeBlock->isConstantRegisterIndex(index))
+ return *reinterpret_cast<Register*>(&codeBlock->constantRegister(index));
+ return this[index];
+ }
+
+ inline Register& ExecState::uncheckedR(int index)
+ {
+ ASSERT(index < FirstConstantRegisterIndex);
+ return this[index];
+ }
+
} // namespace JSC
#endif // CodeBlock_h
projects / apple / javascriptcore.git / blobdiff