#ifndef CodeBlock_h
#define CodeBlock_h
#include "EvalCodeCache.h"
#include "Instruction.h"
#include "JITCode.h"
#include "JSGlobalObject.h"
#include "JumpTable.h"
#include "Nodes.h"
#include "RegExp.h"
#include "UString.h"
#include <wtf/FastAllocBase.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#if ENABLE(JIT)
#include "StructureStubInfo.h"
#endif
static const int FirstConstantRegisterIndex = 0x40000000;
namespace JSC {
class ExecState;
enum CodeType { GlobalCode, EvalCode, FunctionCode, NativeCode };
static ALWAYS_INLINE int missingThisObjectMarker() { return std::numeric_limits<int>::max(); }
struct HandlerInfo {
uint32_t start;
uint32_t end;
uint32_t target;
uint32_t scopeDepth;
#if ENABLE(JIT)
CodeLocationLabel nativeCode;
#endif
};
struct ExpressionRangeInfo {
enum {
MaxOffset = (1 << 7) - 1,
MaxDivot = (1 << 25) - 1
};
uint32_t instructionOffset : 25;
uint32_t divotPoint : 25;
uint32_t startOffset : 7;
uint32_t endOffset : 7;
};
struct LineInfo {
uint32_t instructionOffset;
int32_t lineNumber;
};
struct GetByIdExceptionInfo {
unsigned bytecodeOffset : 31;
bool isOpConstruct : 1;
};
#if ENABLE(JIT)
struct CallLinkInfo {
CallLinkInfo()
: callee(0)
{
}
unsigned bytecodeIndex;
CodeLocationNearCall callReturnLocation;
CodeLocationDataLabelPtr hotPathBegin;
CodeLocationNearCall hotPathOther;
CodeBlock* ownerCodeBlock;
CodeBlock* callee;
unsigned position;
void setUnlinked() { callee = 0; }
bool isLinked() { return callee; }
};
struct MethodCallLinkInfo {
MethodCallLinkInfo()
: cachedStructure(0)
, cachedPrototypeStructure(0)
{
}
CodeLocationCall callReturnLocation;
CodeLocationDataLabelPtr structureLabel;
Structure* cachedStructure;
Structure* cachedPrototypeStructure;
};
struct FunctionRegisterInfo {
FunctionRegisterInfo(unsigned bytecodeOffset, int functionRegisterIndex)
: bytecodeOffset(bytecodeOffset)
, functionRegisterIndex(functionRegisterIndex)
{
}
unsigned bytecodeOffset;
int functionRegisterIndex;
};
struct GlobalResolveInfo {
GlobalResolveInfo(unsigned bytecodeOffset)
: structure(0)
, offset(0)
, bytecodeOffset(bytecodeOffset)
{
}
Structure* structure;
unsigned offset;
unsigned bytecodeOffset;
};
struct CallReturnOffsetToBytecodeIndex {
CallReturnOffsetToBytecodeIndex(unsigned callReturnOffset, unsigned bytecodeIndex)
: callReturnOffset(callReturnOffset)
, bytecodeIndex(bytecodeIndex)
{
}
unsigned callReturnOffset;
unsigned bytecodeIndex;
};
inline void* getStructureStubInfoReturnLocation(StructureStubInfo* structureStubInfo)
{
return structureStubInfo->callReturnLocation.executableAddress();
}
inline void* getCallLinkInfoReturnLocation(CallLinkInfo* callLinkInfo)
{
return callLinkInfo->callReturnLocation.executableAddress();
}
inline void* getMethodCallLinkInfoReturnLocation(MethodCallLinkInfo* methodCallLinkInfo)
{
return methodCallLinkInfo->callReturnLocation.executableAddress();
}
inline unsigned getCallReturnOffset(CallReturnOffsetToBytecodeIndex* pc)
{
return pc->callReturnOffset;
}
template<typename ArrayType, typename KeyType, KeyType(*valueAtPosition)(ArrayType*)>
inline ArrayType* binaryChop(ArrayType* array, size_t size, KeyType key)
{
while (size > 1) {
int pos = (size - 1) >> 1;
KeyType val = valueAtPosition(&array[pos]);
if (val == key)
return &array[pos];
else if (key < val)
size = pos;
else {
size -= (pos + 1);
array += (pos + 1);
}
ASSERT(size);
}
ASSERT(size == 1);
ASSERT(key == valueAtPosition(&array[0]));
return &array[0];
}
#endif
class CodeBlock : public WTF::FastAllocBase {
friend class JIT;
public:
CodeBlock(ScopeNode* ownerNode);
CodeBlock(ScopeNode* ownerNode, CodeType, PassRefPtr<SourceProvider>, unsigned sourceOffset);
~CodeBlock();
void mark();
void refStructures(Instruction* vPC) const;
void derefStructures(Instruction* vPC) const;
#if ENABLE(JIT_OPTIMIZE_CALL)
void unlinkCallers();
#endif
static void dumpStatistics();
#if !defined(NDEBUG) || ENABLE_OPCODE_SAMPLING
void dump(ExecState*) const;
void printStructures(const Instruction*) const;
void printStructure(const char* name, const Instruction*, int operand) const;
#endif
inline bool isKnownNotImmediate(int index)
{
if (index == m_thisRegister)
return true;
if (isConstantRegisterIndex(index))
return getConstant(index).isCell();
return false;
}
ALWAYS_INLINE bool isTemporaryRegisterIndex(int index)
{
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&);
#if ENABLE(JIT)
void addCaller(CallLinkInfo* caller)
{
caller->callee = this;
caller->position = m_linkedCallerList.size();
m_linkedCallerList.append(caller);
}
void removeCaller(CallLinkInfo* caller)
{
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);
}
StructureStubInfo& getStubInfo(ReturnAddressPtr returnAddress)
{
return *(binaryChop<StructureStubInfo, void*, getStructureStubInfoReturnLocation>(m_structureStubInfos.begin(), m_structureStubInfos.size(), returnAddress.value()));
}
CallLinkInfo& getCallLinkInfo(ReturnAddressPtr returnAddress)
{
return *(binaryChop<CallLinkInfo, void*, getCallLinkInfoReturnLocation>(m_callLinkInfos.begin(), m_callLinkInfos.size(), returnAddress.value()));
}
MethodCallLinkInfo& getMethodCallLinkInfo(ReturnAddressPtr returnAddress)
{
return *(binaryChop<MethodCallLinkInfo, void*, getMethodCallLinkInfoReturnLocation>(m_methodCallLinkInfos.begin(), m_methodCallLinkInfos.size(), returnAddress.value()));
}
unsigned getBytecodeIndex(CallFrame* callFrame, ReturnAddressPtr returnAddress)
{
reparseForExceptionInfoIfNecessary(callFrame);
return binaryChop<CallReturnOffsetToBytecodeIndex, unsigned, getCallReturnOffset>(m_exceptionInfo->m_callReturnIndexVector.begin(), m_exceptionInfo->m_callReturnIndexVector.size(), ownerNode()->generatedJITCode().offsetOf(returnAddress.value()))->bytecodeIndex;
}
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; }
#ifndef NDEBUG
void setInstructionCount(unsigned instructionCount) { m_instructionCount = instructionCount; }
#endif
#if ENABLE(JIT)
JITCode& getJITCode() { return ownerNode()->generatedJITCode(); }
void setJITCode(JITCode);
ExecutablePool* executablePool() { return ownerNode()->getExecutablePool(); }
#endif
ScopeNode* ownerNode() const { return m_ownerNode; }
void setGlobalData(JSGlobalData* globalData) { m_globalData = globalData; }
void setThisRegister(int thisRegister) { m_thisRegister = thisRegister; }
int thisRegister() const { return m_thisRegister; }
void setNeedsFullScopeChain(bool needsFullScopeChain) { m_needsFullScopeChain = needsFullScopeChain; }
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; }
CodeType codeType() const { return m_codeType; }
SourceProvider* source() const { ASSERT(m_codeType != NativeCode); return m_source.get(); }
unsigned sourceOffset() const { ASSERT(m_codeType != NativeCode); return m_sourceOffset; }
size_t numberOfJumpTargets() const { return m_jumpTargets.size(); }
void addJumpTarget(unsigned jumpTarget) { m_jumpTargets.append(jumpTarget); }
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); }
bool hasGlobalResolveInstructionAtBytecodeOffset(unsigned bytecodeOffset);
#else
size_t numberOfStructureStubInfos() const { return m_structureStubInfos.size(); }
void addStructureStubInfo(const StructureStubInfo& stubInfo) { m_structureStubInfos.append(stubInfo); }
StructureStubInfo& structureStubInfo(int index) { return m_structureStubInfos[index]; }
void addGlobalResolveInfo(unsigned globalResolveInstruction) { m_globalResolveInfos.append(GlobalResolveInfo(globalResolveInstruction)); }
GlobalResolveInfo& globalResolveInfo(int index) { return m_globalResolveInfos[index]; }
bool hasGlobalResolveInfoAtBytecodeOffset(unsigned bytecodeOffset);
size_t numberOfCallLinkInfos() const { return m_callLinkInfos.size(); }
void addCallLinkInfo() { m_callLinkInfos.append(CallLinkInfo()); }
CallLinkInfo& callLinkInfo(int index) { return m_callLinkInfos[index]; }
void addMethodCallLinkInfos(unsigned n) { m_methodCallLinkInfos.grow(n); }
MethodCallLinkInfo& methodCallLinkInfo(int index) { return m_methodCallLinkInfos[index]; }
void addFunctionRegisterInfo(unsigned bytecodeOffset, int functionIndex) { createRareDataIfNecessary(); m_rareData->m_functionRegisterInfos.append(FunctionRegisterInfo(bytecodeOffset, functionIndex)); }
#endif
size_t numberOfExceptionHandlers() const { return m_rareData ? m_rareData->m_exceptionHandlers.size() : 0; }
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) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_expressionInfo.append(expressionInfo); }
void addGetByIdExceptionInfo(const GetByIdExceptionInfo& info) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_getByIdExceptionInfo.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(); }
#if ENABLE(JIT)
Vector<CallReturnOffsetToBytecodeIndex>& callReturnIndexVector() { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_callReturnIndexVector; }
#endif
size_t numberOfIdentifiers() const { return m_identifiers.size(); }
void addIdentifier(const Identifier& i) { return m_identifiers.append(i); }
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 - FirstConstantRegisterIndex]; }
ALWAYS_INLINE bool isConstantRegisterIndex(int index) { return index >= FirstConstantRegisterIndex; }
ALWAYS_INLINE JSValue getConstant(int index) const { return m_constantRegisters[index - FirstConstantRegisterIndex].jsValue(); }
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(); }
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(); }
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(r); return size; }
RegExp* regexp(int index) const { ASSERT(m_rareData); return m_rareData->m_regexps[index].get(); }
size_t numberOfImmediateSwitchJumpTables() const { return m_rareData ? m_rareData->m_immediateSwitchJumpTables.size() : 0; }
SimpleJumpTable& addImmediateSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_immediateSwitchJumpTables.append(SimpleJumpTable()); return m_rareData->m_immediateSwitchJumpTables.last(); }
SimpleJumpTable& immediateSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_immediateSwitchJumpTables[tableIndex]; }
size_t numberOfCharacterSwitchJumpTables() const { return m_rareData ? m_rareData->m_characterSwitchJumpTables.size() : 0; }
SimpleJumpTable& addCharacterSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_characterSwitchJumpTables.append(SimpleJumpTable()); return m_rareData->m_characterSwitchJumpTables.last(); }
SimpleJumpTable& characterSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_characterSwitchJumpTables[tableIndex]; }
size_t numberOfStringSwitchJumpTables() const { return m_rareData ? m_rareData->m_stringSwitchJumpTables.size() : 0; }
StringJumpTable& addStringSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_stringSwitchJumpTables.append(StringJumpTable()); return m_rareData->m_stringSwitchJumpTables.last(); }
StringJumpTable& stringSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_stringSwitchJumpTables[tableIndex]; }
SymbolTable& symbolTable() { return m_symbolTable; }
EvalCodeCache& evalCodeCache() { ASSERT(m_codeType != NativeCode); createRareDataIfNecessary(); return m_rareData->m_evalCodeCache; }
void shrinkToFit();
int m_numCalleeRegisters;
int m_numVars;
int m_numParameters;
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*);
void createRareDataIfNecessary()
{
ASSERT(m_codeType != NativeCode);
if (!m_rareData)
m_rareData.set(new RareData);
}
ScopeNode* m_ownerNode;
JSGlobalData* m_globalData;
Vector<Instruction> m_instructions;
#ifndef NDEBUG
unsigned m_instructionCount;
#endif
int m_thisRegister;
bool m_needsFullScopeChain;
bool m_usesEval;
bool m_usesArguments;
bool m_isNumericCompareFunction;
CodeType m_codeType;
RefPtr<SourceProvider> m_source;
unsigned m_sourceOffset;
#if !ENABLE(JIT)
Vector<unsigned> m_propertyAccessInstructions;
Vector<unsigned> m_globalResolveInstructions;
#else
Vector<StructureStubInfo> m_structureStubInfos;
Vector<GlobalResolveInfo> m_globalResolveInfos;
Vector<CallLinkInfo> m_callLinkInfos;
Vector<MethodCallLinkInfo> m_methodCallLinkInfos;
Vector<CallLinkInfo*> m_linkedCallerList;
#endif
Vector<unsigned> m_jumpTargets;
Vector<Identifier> m_identifiers;
Vector<Register> m_constantRegisters;
Vector<RefPtr<FuncExprNode> > m_functionExpressions;
SymbolTable m_symbolTable;
struct ExceptionInfo {
Vector<ExpressionRangeInfo> m_expressionInfo;
Vector<LineInfo> m_lineInfo;
Vector<GetByIdExceptionInfo> m_getByIdExceptionInfo;
#if ENABLE(JIT)
Vector<CallReturnOffsetToBytecodeIndex> m_callReturnIndexVector;
#endif
};
OwnPtr<ExceptionInfo> m_exceptionInfo;
struct RareData {
Vector<HandlerInfo> m_exceptionHandlers;
Vector<RefPtr<FuncDeclNode> > m_functions;
Vector<RefPtr<RegExp> > m_regexps;
Vector<SimpleJumpTable> m_immediateSwitchJumpTables;
Vector<SimpleJumpTable> m_characterSwitchJumpTables;
Vector<StringJumpTable> m_stringSwitchJumpTables;
EvalCodeCache m_evalCodeCache;
#if ENABLE(JIT)
Vector<FunctionRegisterInfo> m_functionRegisterInfos;
#endif
};
OwnPtr<RareData> m_rareData;
};
class ProgramCodeBlock : public CodeBlock {
public:
ProgramCodeBlock(ScopeNode* ownerNode, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider)
: CodeBlock(ownerNode, codeType, sourceProvider, 0)
, m_globalObject(globalObject)
{
m_globalObject->codeBlocks().add(this);
}
~ProgramCodeBlock()
{
if (m_globalObject)
m_globalObject->codeBlocks().remove(this);
}
void clearGlobalObject() { m_globalObject = 0; }
private:
JSGlobalObject* m_globalObject; };
class EvalCodeBlock : public ProgramCodeBlock {
public:
EvalCodeBlock(ScopeNode* ownerNode, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, int baseScopeDepth)
: ProgramCodeBlock(ownerNode, EvalCode, globalObject, sourceProvider)
, m_baseScopeDepth(baseScopeDepth)
{
}
int baseScopeDepth() const { return m_baseScopeDepth; }
private:
int m_baseScopeDepth;
};
inline Register& ExecState::r(int index)
{
CodeBlock* codeBlock = this->codeBlock();
if (codeBlock->isConstantRegisterIndex(index))
return codeBlock->constantRegister(index);
return this[index];
}
}
#endif // CodeBlock_h