/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
- * Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2003, 2007, 2008, 2011 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
#ifndef CallFrame_h
#define CallFrame_h
+#include "AbstractPC.h"
#include "JSGlobalData.h"
+#include "MacroAssemblerCodeRef.h"
#include "RegisterFile.h"
-#include "ScopeChain.h"
namespace JSC {
class Arguments;
class JSActivation;
class Interpreter;
+ class ScopeChainNode;
// Represents the current state of script execution.
// Passed as the first argument to most functions.
class ExecState : private Register {
public:
- JSFunction* callee() const { return this[RegisterFile::Callee].function(); }
+ JSValue calleeAsValue() const { return this[RegisterFile::Callee].jsValue(); }
+ JSObject* callee() const { return this[RegisterFile::Callee].function(); }
CodeBlock* codeBlock() const { return this[RegisterFile::CodeBlock].Register::codeBlock(); }
ScopeChainNode* scopeChain() const
{
ASSERT(this[RegisterFile::ScopeChain].Register::scopeChain());
return this[RegisterFile::ScopeChain].Register::scopeChain();
}
- int argumentCount() const { return this[RegisterFile::ArgumentCount].i(); }
-
- JSValue thisValue();
// Global object in which execution began.
JSGlobalObject* dynamicGlobalObject();
// Global object in which the currently executing code was defined.
// Differs from dynamicGlobalObject() during function calls across web browser frames.
- JSGlobalObject* lexicalGlobalObject() const
- {
- return scopeChain()->globalObject;
- }
+ inline JSGlobalObject* lexicalGlobalObject() const;
// Differs from lexicalGlobalObject because this will have DOM window shell rather than
// the actual DOM window, which can't be "this" for security reasons.
- JSObject* globalThisValue() const
- {
- return scopeChain()->globalThis;
- }
+ inline JSObject* globalThisValue() const;
- // FIXME: Elsewhere, we use JSGlobalData* rather than JSGlobalData&.
- // We should make this more uniform and either use a reference everywhere
- // or a pointer everywhere.
- JSGlobalData& globalData() const
- {
- ASSERT(scopeChain()->globalData);
- return *scopeChain()->globalData;
- }
+ inline JSGlobalData& globalData() const;
// Convenience functions for access to global data.
// It takes a few memory references to get from a call frame to the global data
// pointer, so these are inefficient, and should be used sparingly in new code.
// But they're used in many places in legacy code, so they're not going away any time soon.
- void setException(JSValue exception) { globalData().exception = exception; }
void clearException() { globalData().exception = JSValue(); }
JSValue exception() const { return globalData().exception; }
- JSValue* exceptionSlot() { return &globalData().exception; }
bool hadException() const { return globalData().exception; }
const CommonIdentifiers& propertyNames() const { return *globalData().propertyNames; }
#ifndef NDEBUG
void dumpCaller();
#endif
- static const HashTable* arrayTable(CallFrame* callFrame) { return callFrame->globalData().arrayTable; }
+ static const HashTable* arrayConstructorTable(CallFrame* callFrame) { return callFrame->globalData().arrayConstructorTable; }
+ static const HashTable* arrayPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().arrayPrototypeTable; }
+ static const HashTable* booleanPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().booleanPrototypeTable; }
static const HashTable* dateTable(CallFrame* callFrame) { return callFrame->globalData().dateTable; }
+ static const HashTable* dateConstructorTable(CallFrame* callFrame) { return callFrame->globalData().dateConstructorTable; }
+ static const HashTable* errorPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().errorPrototypeTable; }
+ static const HashTable* globalObjectTable(CallFrame* callFrame) { return callFrame->globalData().globalObjectTable; }
static const HashTable* jsonTable(CallFrame* callFrame) { return callFrame->globalData().jsonTable; }
static const HashTable* mathTable(CallFrame* callFrame) { return callFrame->globalData().mathTable; }
- static const HashTable* numberTable(CallFrame* callFrame) { return callFrame->globalData().numberTable; }
+ static const HashTable* numberConstructorTable(CallFrame* callFrame) { return callFrame->globalData().numberConstructorTable; }
+ static const HashTable* numberPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().numberPrototypeTable; }
+ static const HashTable* objectConstructorTable(CallFrame* callFrame) { return callFrame->globalData().objectConstructorTable; }
+ static const HashTable* objectPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().objectPrototypeTable; }
static const HashTable* regExpTable(CallFrame* callFrame) { return callFrame->globalData().regExpTable; }
static const HashTable* regExpConstructorTable(CallFrame* callFrame) { return callFrame->globalData().regExpConstructorTable; }
+ static const HashTable* regExpPrototypeTable(CallFrame* callFrame) { return callFrame->globalData().regExpPrototypeTable; }
static const HashTable* stringTable(CallFrame* callFrame) { return callFrame->globalData().stringTable; }
+ static const HashTable* stringConstructorTable(CallFrame* callFrame) { return callFrame->globalData().stringConstructorTable; }
static CallFrame* create(Register* callFrameBase) { return static_cast<CallFrame*>(callFrameBase); }
Register* registers() { return this; }
CallFrame& operator=(const Register& r) { *static_cast<Register*>(this) = r; return *this; }
CallFrame* callerFrame() const { return this[RegisterFile::CallerFrame].callFrame(); }
- Arguments* optionalCalleeArguments() const { return this[RegisterFile::OptionalCalleeArguments].arguments(); }
- Instruction* returnPC() const { return this[RegisterFile::ReturnPC].vPC(); }
+#if ENABLE(JIT)
+ ReturnAddressPtr returnPC() const { return ReturnAddressPtr(this[RegisterFile::ReturnPC].vPC()); }
+ bool hasReturnPC() const { return !!this[RegisterFile::ReturnPC].vPC(); }
+ void clearReturnPC() { registers()[RegisterFile::ReturnPC] = static_cast<Instruction*>(0); }
+#endif
+ AbstractPC abstractReturnPC(JSGlobalData& globalData) { return AbstractPC(globalData, this); }
+#if USE(JSVALUE32_64)
+ unsigned bytecodeOffsetForNonDFGCode() const;
+ void setBytecodeOffsetForNonDFGCode(unsigned offset);
+#else
+ unsigned bytecodeOffsetForNonDFGCode() const
+ {
+ ASSERT(codeBlock());
+ return this[RegisterFile::ArgumentCount].tag();
+ }
+
+ void setBytecodeOffsetForNonDFGCode(unsigned offset)
+ {
+ ASSERT(codeBlock());
+ this[RegisterFile::ArgumentCount].tag() = static_cast<int32_t>(offset);
+ }
+#endif
+
+ Register* frameExtent()
+ {
+ if (!codeBlock())
+ return registers();
+ return frameExtentInternal();
+ }
+
+ Register* frameExtentInternal();
+
+#if ENABLE(DFG_JIT)
+ InlineCallFrame* inlineCallFrame() const { return this[RegisterFile::ReturnPC].asInlineCallFrame(); }
+ unsigned codeOriginIndexForDFG() const { return this[RegisterFile::ArgumentCount].tag(); }
+#else
+ // This will never be called if !ENABLE(DFG_JIT) since all calls should be guarded by
+ // isInlineCallFrame(). But to make it easier to write code without having a bunch of
+ // #if's, we make a dummy implementation available anyway.
+ InlineCallFrame* inlineCallFrame() const
+ {
+ ASSERT_NOT_REACHED();
+ return 0;
+ }
+#endif
+#if ENABLE(CLASSIC_INTERPRETER)
+ Instruction* returnVPC() const { return this[RegisterFile::ReturnPC].vPC(); }
+#endif
+#if USE(JSVALUE32_64)
+ Instruction* currentVPC() const
+ {
+ return bitwise_cast<Instruction*>(this[RegisterFile::ArgumentCount].tag());
+ }
+ void setCurrentVPC(Instruction* vpc)
+ {
+ this[RegisterFile::ArgumentCount].tag() = bitwise_cast<int32_t>(vpc);
+ }
+#else
+ Instruction* currentVPC() const;
+ void setCurrentVPC(Instruction* vpc);
+#endif
- void setCalleeArguments(JSValue arguments) { static_cast<Register*>(this)[RegisterFile::OptionalCalleeArguments] = arguments; }
void setCallerFrame(CallFrame* callerFrame) { static_cast<Register*>(this)[RegisterFile::CallerFrame] = callerFrame; }
void setScopeChain(ScopeChainNode* scopeChain) { static_cast<Register*>(this)[RegisterFile::ScopeChain] = scopeChain; }
ALWAYS_INLINE void init(CodeBlock* codeBlock, Instruction* vPC, ScopeChainNode* scopeChain,
- CallFrame* callerFrame, int returnValueRegister, int argc, JSFunction* function)
+ CallFrame* callerFrame, int argc, JSObject* callee)
{
ASSERT(callerFrame); // Use noCaller() rather than 0 for the outer host call frame caller.
+ ASSERT(callerFrame == noCaller() || callerFrame->removeHostCallFrameFlag()->registerFile()->end() >= this);
setCodeBlock(codeBlock);
setScopeChain(scopeChain);
setCallerFrame(callerFrame);
- static_cast<Register*>(this)[RegisterFile::ReturnPC] = vPC; // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
- static_cast<Register*>(this)[RegisterFile::ReturnValueRegister] = Register::withInt(returnValueRegister);
- setArgumentCount(argc); // original argument count (for the sake of the "arguments" object)
- setCallee(function);
- setCalleeArguments(JSValue());
+ setReturnPC(vPC); // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
+ setArgumentCountIncludingThis(argc); // original argument count (for the sake of the "arguments" object)
+ setCallee(callee);
}
// Read a register from the codeframe (or constant from the CodeBlock).
inline Register& r(int);
+ // Read a register for a non-constant
+ inline Register& uncheckedR(int);
+
+ // Access to arguments.
+ size_t argumentCount() const { return argumentCountIncludingThis() - 1; }
+ size_t argumentCountIncludingThis() const { return this[RegisterFile::ArgumentCount].payload(); }
+ static int argumentOffset(size_t argument) { return s_firstArgumentOffset - argument; }
+ static int argumentOffsetIncludingThis(size_t argument) { return s_thisArgumentOffset - argument; }
+
+ JSValue argument(size_t argument)
+ {
+ if (argument >= argumentCount())
+ return jsUndefined();
+ return this[argumentOffset(argument)].jsValue();
+ }
+ void setArgument(size_t argument, JSValue value)
+ {
+ this[argumentOffset(argument)] = value;
+ }
+
+ static int thisArgumentOffset() { return argumentOffsetIncludingThis(0); }
+ JSValue thisValue() { return this[thisArgumentOffset()].jsValue(); }
+ void setThisValue(JSValue value) { this[thisArgumentOffset()] = value; }
+
+ static int offsetFor(size_t argumentCountIncludingThis) { return argumentCountIncludingThis + RegisterFile::CallFrameHeaderSize; }
+
+ // FIXME: Remove these.
+ int hostThisRegister() { return thisArgumentOffset(); }
+ JSValue hostThisValue() { return thisValue(); }
static CallFrame* noCaller() { return reinterpret_cast<CallFrame*>(HostCallFrameFlag); }
- int returnValueRegister() const { return this[RegisterFile::ReturnValueRegister].i(); }
bool hasHostCallFrameFlag() const { return reinterpret_cast<intptr_t>(this) & HostCallFrameFlag; }
CallFrame* addHostCallFrameFlag() const { return reinterpret_cast<CallFrame*>(reinterpret_cast<intptr_t>(this) | HostCallFrameFlag); }
CallFrame* removeHostCallFrameFlag() { return reinterpret_cast<CallFrame*>(reinterpret_cast<intptr_t>(this) & ~HostCallFrameFlag); }
- private:
- void setArgumentCount(int count) { static_cast<Register*>(this)[RegisterFile::ArgumentCount] = Register::withInt(count); }
- void setCallee(JSFunction* callee) { static_cast<Register*>(this)[RegisterFile::Callee] = callee; }
+ void setArgumentCountIncludingThis(int count) { static_cast<Register*>(this)[RegisterFile::ArgumentCount].payload() = count; }
+ void setCallee(JSObject* callee) { static_cast<Register*>(this)[RegisterFile::Callee] = Register::withCallee(callee); }
void setCodeBlock(CodeBlock* codeBlock) { static_cast<Register*>(this)[RegisterFile::CodeBlock] = codeBlock; }
+ void setReturnPC(void* value) { static_cast<Register*>(this)[RegisterFile::ReturnPC] = (Instruction*)value; }
+
+#if ENABLE(DFG_JIT)
+ bool isInlineCallFrame();
+
+ void setInlineCallFrame(InlineCallFrame* inlineCallFrame) { static_cast<Register*>(this)[RegisterFile::ReturnPC] = inlineCallFrame; }
+
+ // Call this to get the semantically correct JS CallFrame* for the
+ // currently executing function.
+ CallFrame* trueCallFrame(AbstractPC);
+
+ // Call this to get the semantically correct JS CallFrame* corresponding
+ // to the caller. This resolves issues surrounding inlining and the
+ // HostCallFrameFlag stuff.
+ CallFrame* trueCallerFrame();
+#else
+ bool isInlineCallFrame() { return false; }
+
+ CallFrame* trueCallFrame(AbstractPC) { return this; }
+ CallFrame* trueCallerFrame() { return callerFrame()->removeHostCallFrameFlag(); }
+#endif
+
+ // Call this to get the true call frame (accounted for inlining and any
+ // other optimizations), when you have entered into VM code through one
+ // of the "blessed" entrypoints (JITStubs or DFGOperations). This means
+ // that if you're pretty much anywhere in the VM you can safely call this;
+ // though if you were to magically get an ExecState* by, say, interrupting
+ // a thread that is running JS code and brutishly scraped the call frame
+ // register, calling this method would probably lead to horrible things
+ // happening.
+ CallFrame* trueCallFrameFromVMCode() { return trueCallFrame(AbstractPC()); }
+ private:
static const intptr_t HostCallFrameFlag = 1;
+ static const int s_thisArgumentOffset = -1 - RegisterFile::CallFrameHeaderSize;
+ static const int s_firstArgumentOffset = s_thisArgumentOffset - 1;
+#ifndef NDEBUG
+ RegisterFile* registerFile();
+#endif
+#if ENABLE(DFG_JIT)
+ bool isInlineCallFrameSlow();
+#endif
ExecState();
~ExecState();
};
projects / apple / javascriptcore.git / blobdiff