X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/6fe7ccc865dc7d7541b93c5bcaf6368d2c98a174..refs/heads/master:/interpreter/Interpreter.h

diff --git a/interpreter/Interpreter.h b/interpreter/Interpreter.h
index 7e34bba..ef4ec0d 100644
--- a/interpreter/Interpreter.h
+++ b/interpreter/Interpreter.h
@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2013, 2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -10,7 +11,7 @@
  * 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -30,15 +31,17 @@
 #define Interpreter_h
 
 #include "ArgList.h"
+#include "JSCJSValue.h"
 #include "JSCell.h"
-#include "JSFunction.h"
-#include "JSValue.h"
 #include "JSObject.h"
+#include "JSStack.h"
 #include "LLIntData.h"
 #include "Opcode.h"
-#include "RegisterFile.h"
+#include "SourceProvider.h"
+#include "StackAlignment.h"
 
 #include <wtf/HashMap.h>
+#include <wtf/text/StringBuilder.h>
 
 namespace JSC {
 
@@ -46,16 +49,19 @@ namespace JSC {
     class EvalExecutable;
     class ExecutableBase;
     class FunctionExecutable;
+    class VM;
+    class JSFunction;
     class JSGlobalObject;
     class LLIntOffsetsExtractor;
     class ProgramExecutable;
     class Register;
-    class ScopeChainNode;
+    class JSScope;
     class SamplingTool;
     struct CallFrameClosure;
     struct HandlerInfo;
     struct Instruction;
-    
+    struct ProtoCallFrame;
+
     enum DebugHookID {
         WillExecuteProgram,
         DidExecuteProgram,
@@ -75,102 +81,112 @@ namespace JSC {
     struct StackFrame {
         Strong<JSObject> callee;
         StackFrameCodeType codeType;
-        Strong<ExecutableBase> executable;
-        int line;
-        UString sourceURL;
-        UString toString(CallFrame* callFrame) const
+        Strong<ScriptExecutable> executable;
+        Strong<UnlinkedCodeBlock> codeBlock;
+        RefPtr<SourceProvider> code;
+        int lineOffset;
+        unsigned firstLineColumnOffset;
+        unsigned characterOffset;
+        unsigned bytecodeOffset;
+        String sourceURL;
+        JS_EXPORT_PRIVATE String toString(CallFrame*);
+        String friendlySourceURL() const;
+        String friendlyFunctionName(CallFrame*) const;
+        JS_EXPORT_PRIVATE void computeLineAndColumn(unsigned& line, unsigned& column);
+
+    private:
+        void expressionInfo(int& divot, int& startOffset, int& endOffset, unsigned& line, unsigned& column);
+    };
+
+    class SuspendExceptionScope {
+    public:
+        SuspendExceptionScope(VM* vm)
+            : m_vm(vm)
+        {
+            oldException = vm->exception();
+            vm->clearException();
+        }
+        ~SuspendExceptionScope()
         {
-            bool hasSourceURLInfo = !sourceURL.isNull() && !sourceURL.isEmpty();
-            bool hasLineInfo = line > -1;
-            String traceLine;
-            JSObject* stackFrameCallee = callee.get();
-
-            switch (codeType) {
-            case StackFrameEvalCode:
-                if (hasSourceURLInfo) {
-                    traceLine = hasLineInfo ? String::format("eval code@%s:%d", sourceURL.ascii().data(), line) 
-                                            : String::format("eval code@%s", sourceURL.ascii().data());
-                } else
-                    traceLine = String::format("eval code");
-                break;
-            case StackFrameNativeCode: {
-                if (callee) {
-                    UString functionName = getCalculatedDisplayName(callFrame, stackFrameCallee);
-                    traceLine = String::format("%s@[native code]", functionName.ascii().data());
-                } else
-                    traceLine = "[native code]";
-                break;
-            }
-            case StackFrameFunctionCode: {
-                UString functionName = getCalculatedDisplayName(callFrame, stackFrameCallee);
-                if (hasSourceURLInfo) {
-                    traceLine = hasLineInfo ? String::format("%s@%s:%d", functionName.ascii().data(), sourceURL.ascii().data(), line)
-                                            : String::format("%s@%s", functionName.ascii().data(), sourceURL.ascii().data());
-                } else
-                    traceLine = String::format("%s\n", functionName.ascii().data());
-                break;
-            }
-            case StackFrameGlobalCode:
-                if (hasSourceURLInfo) {
-                    traceLine = hasLineInfo ? String::format("global code@%s:%d", sourceURL.ascii().data(), line)
-                                            : String::format("global code@%s", sourceURL.ascii().data());
-                } else
-                    traceLine = String::format("global code");
-                    
-            }
-            return traceLine.impl();
+            m_vm->setException(oldException);
         }
+    private:
+        Exception* oldException;
+        VM* m_vm;
     };
-
+    
     class TopCallFrameSetter {
     public:
-        TopCallFrameSetter(JSGlobalData& global, CallFrame* callFrame)
-            : globalData(global)
-            , oldCallFrame(global.topCallFrame) 
+        TopCallFrameSetter(VM& currentVM, CallFrame* callFrame)
+            : vm(currentVM)
+            , oldCallFrame(currentVM.topCallFrame) 
         {
-            global.topCallFrame = callFrame;
+            currentVM.topCallFrame = callFrame;
         }
         
         ~TopCallFrameSetter() 
         {
-            globalData.topCallFrame = oldCallFrame;
+            vm.topCallFrame = oldCallFrame;
         }
     private:
-        JSGlobalData& globalData;
+        VM& vm;
         CallFrame* oldCallFrame;
     };
     
     class NativeCallFrameTracer {
     public:
-        ALWAYS_INLINE NativeCallFrameTracer(JSGlobalData* global, CallFrame* callFrame)
+        ALWAYS_INLINE NativeCallFrameTracer(VM* vm, CallFrame* callFrame)
         {
-            ASSERT(global);
+            ASSERT(vm);
             ASSERT(callFrame);
-            global->topCallFrame = callFrame;
+            vm->topCallFrame = callFrame;
         }
     };
 
-    // We use a smaller reentrancy limit on iPhone because of the high amount of
-    // stack space required on the web thread.
-    enum { MaxLargeThreadReentryDepth = 64, MaxSmallThreadReentryDepth = 16 };
+    class NativeCallFrameTracerWithRestore {
+    public:
+        ALWAYS_INLINE NativeCallFrameTracerWithRestore(VM* vm, VMEntryFrame* vmEntryFrame, CallFrame* callFrame)
+            : m_vm(vm)
+        {
+            ASSERT(vm);
+            ASSERT(callFrame);
+            m_savedTopVMEntryFrame = vm->topVMEntryFrame;
+            m_savedTopCallFrame = vm->topCallFrame;
+            vm->topVMEntryFrame = vmEntryFrame;
+            vm->topCallFrame = callFrame;
+        }
+
+        ALWAYS_INLINE ~NativeCallFrameTracerWithRestore()
+        {
+            m_vm->topVMEntryFrame = m_savedTopVMEntryFrame;
+            m_vm->topCallFrame = m_savedTopCallFrame;
+        }
+
+    private:
+        VM* m_vm;
+        VMEntryFrame* m_savedTopVMEntryFrame;
+        CallFrame* m_savedTopCallFrame;
+    };
 
     class Interpreter {
         WTF_MAKE_FAST_ALLOCATED;
         friend class CachedCall;
         friend class LLIntOffsetsExtractor;
         friend class JIT;
+        friend class VM;
+
     public:
-        Interpreter();
+        Interpreter(VM &);
         ~Interpreter();
         
-        void initialize(LLInt::Data*, bool canUseJIT);
+        void initialize(bool canUseJIT);
 
-        RegisterFile& registerFile() { return m_registerFile; }
+        JSStack& stack() { return m_stack; }
         
         Opcode getOpcode(OpcodeID id)
         {
             ASSERT(m_initialized);
-#if ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER) || ENABLE(LLINT)
+#if ENABLE(COMPUTED_GOTO_OPCODES)
             return m_opcodeTable[id];
 #else
             return id;
@@ -180,122 +196,90 @@ namespace JSC {
         OpcodeID getOpcodeID(Opcode opcode)
         {
             ASSERT(m_initialized);
-#if ENABLE(LLINT)
+#if ENABLE(COMPUTED_GOTO_OPCODES)
             ASSERT(isOpcode(opcode));
-            return m_opcodeIDTable.get(opcode);
-#elif ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER)
-            ASSERT(isOpcode(opcode));
-            if (!m_classicEnabled)
-                return static_cast<OpcodeID>(bitwise_cast<uintptr_t>(opcode));
-
             return m_opcodeIDTable.get(opcode);
 #else
             return opcode;
 #endif
         }
         
-        bool classicEnabled()
-        {
-            return m_classicEnabled;
-        }
-
         bool isOpcode(Opcode);
 
-        JSValue execute(ProgramExecutable*, CallFrame*, ScopeChainNode*, JSObject* thisObj);
+        JSValue execute(ProgramExecutable*, CallFrame*, JSObject* thisObj);
         JSValue executeCall(CallFrame*, JSObject* function, CallType, const CallData&, JSValue thisValue, const ArgList&);
         JSObject* executeConstruct(CallFrame*, JSObject* function, ConstructType, const ConstructData&, const ArgList&);
-        JSValue execute(EvalExecutable*, CallFrame*, JSValue thisValue, ScopeChainNode*);
-        JSValue execute(EvalExecutable*, CallFrame*, JSValue thisValue, ScopeChainNode*, int globalRegisterOffset);
+        JSValue execute(EvalExecutable*, CallFrame*, JSValue thisValue, JSScope*);
 
-        JSValue retrieveArgumentsFromVMCode(CallFrame*, JSFunction*) const;
-        JSValue retrieveCallerFromVMCode(CallFrame*, JSFunction*) const;
-        JS_EXPORT_PRIVATE void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const;
-        
         void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
         
         SamplingTool* sampler() { return m_sampler.get(); }
 
-        NEVER_INLINE HandlerInfo* throwException(CallFrame*&, JSValue&, unsigned bytecodeOffset);
-        NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine);
-        static const UString getTraceLine(CallFrame*, StackFrameCodeType, const UString&, int);
-        JS_EXPORT_PRIVATE static void getStackTrace(JSGlobalData*, Vector<StackFrame>& results);
-        static void addStackTraceIfNecessary(CallFrame*, JSObject* error);
+        NEVER_INLINE HandlerInfo* unwind(VMEntryFrame*&, CallFrame*&, Exception*);
+        NEVER_INLINE void debug(CallFrame*, DebugHookID);
+        JSString* stackTraceAsString(ExecState*, Vector<StackFrame>);
+
+        static EncodedJSValue JSC_HOST_CALL constructWithErrorConstructor(ExecState*);
+        static EncodedJSValue JSC_HOST_CALL callErrorConstructor(ExecState*);
+        static EncodedJSValue JSC_HOST_CALL constructWithNativeErrorConstructor(ExecState*);
+        static EncodedJSValue JSC_HOST_CALL callNativeErrorConstructor(ExecState*);
 
         void dumpSampleData(ExecState* exec);
         void startSampling();
         void stopSampling();
-    private:
-        enum ExecutionFlag { Normal, InitializeAndReturn };
 
-        CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, JSFunction*, int argumentCountIncludingThis, ScopeChainNode*);
-        void endRepeatCall(CallFrameClosure&);
-        JSValue execute(CallFrameClosure&);
+        JS_EXPORT_PRIVATE void dumpCallFrame(CallFrame*);
 
-#if ENABLE(CLASSIC_INTERPRETER)
-        NEVER_INLINE bool resolve(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE bool resolveSkip(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE bool resolveGlobalDynamic(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC);
-        NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE bool resolveThisAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue);
-        NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC);
+        void getStackTrace(Vector<StackFrame>& results, size_t maxStackSize = std::numeric_limits<size_t>::max());
 
-        void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const Identifier& propertyName, const PropertySlot&);
-        void uncacheGetByID(CodeBlock*, Instruction* vPC);
-        void tryCachePutByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const PutPropertySlot&);
-        void uncachePutByID(CodeBlock*, Instruction* vPC);        
-#endif // ENABLE(CLASSIC_INTERPRETER)
+    private:
+        enum ExecutionFlag { Normal, InitializeAndReturn };
 
-        NEVER_INLINE bool unwindCallFrame(CallFrame*&, JSValue, unsigned& bytecodeOffset, CodeBlock*&);
+        CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, ProtoCallFrame*, JSFunction*, int argumentCountIncludingThis, JSScope*, JSValue*);
 
-        static ALWAYS_INLINE CallFrame* slideRegisterWindowForCall(CodeBlock*, RegisterFile*, CallFrame*, size_t registerOffset, int argc);
+        JSValue execute(CallFrameClosure&);
 
-        static CallFrame* findFunctionCallFrameFromVMCode(CallFrame*, JSFunction*);
 
-        JSValue privateExecute(ExecutionFlag, RegisterFile*, CallFrame*);
 
-        void dumpCallFrame(CallFrame*);
         void dumpRegisters(CallFrame*);
         
         bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval); }
 
         void enableSampler();
         int m_sampleEntryDepth;
-        OwnPtr<SamplingTool> m_sampler;
+        std::unique_ptr<SamplingTool> m_sampler;
 
-        int m_reentryDepth;
-
-        RegisterFile m_registerFile;
+        VM& m_vm;
+        JSStack m_stack;
+        int m_errorHandlingModeReentry;
         
-#if ENABLE(LLINT)
+#if ENABLE(COMPUTED_GOTO_OPCODES)
         Opcode* m_opcodeTable; // Maps OpcodeID => Opcode for compiling
         HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
-#elif ENABLE(COMPUTED_GOTO_CLASSIC_INTERPRETER)
-        Opcode m_opcodeTable[numOpcodeIDs]; // Maps OpcodeID => Opcode for compiling
-        HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
 #endif
 
 #if !ASSERT_DISABLED
         bool m_initialized;
 #endif
-        bool m_classicEnabled;
     };
 
-    // This value must not be an object that would require this conversion (WebCore's global object).
-    inline bool isValidThisObject(JSValue thisValue, ExecState* exec)
-    {
-        return !thisValue.isObject() || thisValue.toThisObject(exec) == thisValue;
-    }
+    JSValue eval(CallFrame*);
 
-    inline JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSValue thisValue, ScopeChainNode* scopeChain)
+    inline CallFrame* calleeFrameForVarargs(CallFrame* callFrame, unsigned numUsedStackSlots, unsigned argumentCountIncludingThis)
     {
-        return execute(eval, callFrame, thisValue, scopeChain, m_registerFile.size() + 1 + RegisterFile::CallFrameHeaderSize);
+        unsigned paddedCalleeFrameOffset = WTF::roundUpToMultipleOf(
+            stackAlignmentRegisters(),
+            numUsedStackSlots + argumentCountIncludingThis + JSStack::CallFrameHeaderSize);
+        return CallFrame::create(callFrame->registers() - paddedCalleeFrameOffset);
     }
 
-    JSValue eval(CallFrame*);
-    CallFrame* loadVarargs(CallFrame*, RegisterFile*, JSValue thisValue, JSValue arguments, int firstFreeRegister);
-
+    unsigned sizeOfVarargs(CallFrame* exec, JSValue arguments, uint32_t firstVarArgOffset);
+    static const unsigned maxArguments = 0x10000;
+    unsigned sizeFrameForVarargs(CallFrame* exec, JSStack*, JSValue arguments, unsigned numUsedStackSlots, uint32_t firstVarArgOffset);
+    void loadVarargs(CallFrame* execCaller, VirtualRegister firstElementDest, JSValue source, uint32_t offset, uint32_t length);
+    void setupVarargsFrame(CallFrame* execCaller, CallFrame* execCallee, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
+    void setupVarargsFrameAndSetThis(CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
+    
 } // namespace JSC
 
 #endif // Interpreter_h