Package org.htmlunit.corejs.javascript

Class Interpreter

java.lang.Object

org.htmlunit.corejs.javascript.Icode

org.htmlunit.corejs.javascript.Interpreter

All Implemented Interfaces:

Evaluator

public final class Interpreter
extends Icode
implements Evaluator

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Interpreter.CallFrame	Class to hold data corresponding to one interpreted call stack frame.
private static final class	Interpreter.ContinuationJump
(package private) static class	Interpreter.GeneratorState

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	EXCEPTION_HANDLER_SLOT
(package private) static final int	EXCEPTION_LOCAL_SLOT
(package private) static final int	EXCEPTION_SCOPE_SLOT
(package private) static final int	EXCEPTION_SLOT_SIZE
(package private) static final int	EXCEPTION_TRY_END_SLOT
(package private) static final int	EXCEPTION_TRY_START_SLOT
(package private) static final int	EXCEPTION_TYPE_SLOT
(package private) InterpreterData	itsData

Fields inherited from class org.htmlunit.corejs.javascript.Icode

Icode_CALLSPECIAL, Icode_CLOSURE_EXPR, Icode_CLOSURE_STMT, Icode_DEBUGGER, Icode_DELNAME, Icode_DUP, Icode_DUP2, Icode_ELEM_AND_THIS, Icode_ELEM_INC_DEC, Icode_ENTERDQ, Icode_GENERATOR, Icode_GENERATOR_END, Icode_GENERATOR_RETURN, Icode_GETVAR1, Icode_GOSUB, Icode_IFEQ_POP, Icode_INTNUMBER, Icode_LEAVEDQ, Icode_LINE, Icode_LITERAL_GETTER, Icode_LITERAL_NEW, Icode_LITERAL_SET, Icode_LITERAL_SETTER, Icode_LOCAL_CLEAR, Icode_NAME_AND_THIS, Icode_NAME_INC_DEC, Icode_ONE, Icode_POP, Icode_POP_RESULT, Icode_PROP_AND_THIS, Icode_PROP_INC_DEC, Icode_REF_INC_DEC, Icode_REG_BIGINT_C0, Icode_REG_BIGINT_C1, Icode_REG_BIGINT_C2, Icode_REG_BIGINT_C3, Icode_REG_BIGINT1, Icode_REG_BIGINT2, Icode_REG_BIGINT4, Icode_REG_IND_C0, Icode_REG_IND_C1, Icode_REG_IND_C2, Icode_REG_IND_C3, Icode_REG_IND_C4, Icode_REG_IND_C5, Icode_REG_IND1, Icode_REG_IND2, Icode_REG_IND4, Icode_REG_STR_C0, Icode_REG_STR_C1, Icode_REG_STR_C2, Icode_REG_STR_C3, Icode_REG_STR1, Icode_REG_STR2, Icode_REG_STR4, Icode_RETSUB, Icode_RETUNDEF, Icode_SCOPE_LOAD, Icode_SCOPE_SAVE, Icode_SETCONST, Icode_SETCONSTVAR, Icode_SETCONSTVAR1, Icode_SETVAR1, Icode_SHORTNUMBER, Icode_SPARE_ARRAYLIT, Icode_STARTSUB, Icode_SWAP, Icode_TAIL_CALL, Icode_TEMPLATE_LITERAL_CALLSITE, Icode_TYPEOFNAME, Icode_UNDEF, Icode_VALUE_AND_THIS, Icode_VAR_INC_DEC, Icode_YIELD_STAR, Icode_ZERO, MIN_ICODE

Constructor Summary

Constructors

Constructor	Description
Interpreter()

Method Summary

Modifier and Type	Method	Description
private static void	addInstructionCount(Context cx, Interpreter.CallFrame frame, int extra)
private static int	bytecodeSpan(int bytecode)
static NativeContinuation	captureContinuation(Context cx)
private static NativeContinuation	captureContinuation(Context cx, Interpreter.CallFrame frame, boolean requireContinuationsTopFrame)
private static Interpreter.CallFrame	captureFrameForGenerator(Interpreter.CallFrame frame)
void	captureStackInfo(RhinoException ex)	Capture stack information from the given exception.
private static boolean	compareIdata(InterpreterData i1, InterpreterData i2)
Object	compile(CompilerEnvirons compilerEnv, ScriptNode tree, String encodedSource, boolean returnFunction)	Compile the script or function from intermediate representation tree into an executable form.
Function	createFunctionObject(Context cx, Scriptable scope, Object bytecode, Object staticSecurityDomain)	Create a function object.
Script	createScriptObject(Object bytecode, Object staticSecurityDomain)	Create a script object.
private static void	doAdd(Object[] stack, double[] sDbl, int stackTop, Context cx)
private static int	doArithmetic(Interpreter.CallFrame frame, int op, Object[] stack, double[] sDbl, int stackTop)
private static int	doBitNOT(Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop)
private static int	doBitOp(Interpreter.CallFrame frame, int op, Object[] stack, double[] sDbl, int stackTop)
private static int	doCallSpecial(Context cx, Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, byte[] iCode, int indexReg)
private static int	doCompare(Interpreter.CallFrame frame, int op, Object[] stack, double[] sDbl, int stackTop)
private static int	doDelName(Context cx, Interpreter.CallFrame frame, int op, Object[] stack, double[] sDbl, int stackTop)
private static int	doElemIncDec(Context cx, Interpreter.CallFrame frame, byte[] iCode, Object[] stack, double[] sDbl, int stackTop)
private static boolean	doEquals(Object[] stack, double[] sDbl, int stackTop)
private static int	doGetElem(Context cx, Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop)
private static int	doGetVar(Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, Object[] vars, double[] varDbls, int indexReg)
private static int	doInOrInstanceof(Context cx, int op, Object[] stack, double[] sDbl, int stackTop)
private static int	doRefMember(Context cx, Object[] stack, double[] sDbl, int stackTop, int flags)
private static int	doRefNsMember(Context cx, Object[] stack, double[] sDbl, int stackTop, int flags)
private static int	doRefNsName(Context cx, Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, int flags)
private static int	doSetConstVar(Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, Object[] vars, double[] varDbls, int[] varAttributes, int indexReg)
private static int	doSetElem(Context cx, Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop)
private static int	doSetVar(Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, Object[] vars, double[] varDbls, int[] varAttributes, int indexReg)
private static boolean	doShallowEquals(Object[] stack, double[] sDbl, int stackTop)
private static int	doVarIncDec(Context cx, Interpreter.CallFrame frame, Object[] stack, double[] sDbl, int stackTop, Object[] vars, double[] varDbls, int[] varAttributes, int indexReg)
(package private) static void	dumpICode(InterpreterData idata)
private static void	enterFrame(Context cx, Interpreter.CallFrame frame, Object[] args, boolean continuationRestart)
private static void	exitFrame(Context cx, Interpreter.CallFrame frame, Object throwable)
private static Object	freezeGenerator(Context cx, Interpreter.CallFrame frame, int stackTop, Interpreter.GeneratorState generatorState, boolean yieldStar)
private static Object[]	getArgsArray(Object[] stack, double[] sDbl, int shift, int count)
(package private) static String	getEncodedSource(InterpreterData idata)
private static int	getExceptionHandler(Interpreter.CallFrame frame, boolean onlyFinally)
private static int	getIndex(byte[] iCode, int pc)
private static int	getInt(byte[] iCode, int pc)
(package private) static int[]	getLineNumbers(InterpreterData data)
String	getPatchedStack(RhinoException ex, String nativeStackTrace)	Given a native stack trace, patch it with script-specific source and line information
List<String>	getScriptStack(RhinoException ex)	Get the script stack for the given exception
ScriptStackElement[][]	getScriptStackElements(RhinoException ex)
private static int	getShort(byte[] iCode, int pc)
String	getSourcePositionFromStack(Context cx, int[] linep)	Get the source position information by examining the stack.
private static Interpreter.CallFrame	initFrame(Context cx, Scriptable callerScope, Scriptable thisObj, Object[] args, double[] argsDbl, int argShift, int argCount, InterpretedFunction fnOrScript, Interpreter.CallFrame parentFrame)
private static Interpreter.CallFrame	initFrameForApplyOrCall(Context cx, Interpreter.CallFrame frame, int indexReg, Object[] stack, double[] sDbl, int stackTop, int op, Scriptable calleeScope, IdFunctionObject ifun, InterpretedFunction iApplyCallable)
private static Interpreter.CallFrame	initFrameForNoSuchMethod(Context cx, Interpreter.CallFrame frame, int indexReg, Object[] stack, double[] sDbl, int stackTop, int op, Scriptable funThisObj, Scriptable calleeScope, ScriptRuntime.NoSuchMethodShim noSuchMethodShim, InterpretedFunction ifun)	Call __noSuchMethod__.
private static void	initFunction(Context cx, Scriptable scope, InterpretedFunction parent, int index)
(package private) static Object	interpret(InterpretedFunction ifun, Context cx, Scriptable scope, Scriptable thisObj, Object[] args)
private static Object	interpretLoop(Context cx, Interpreter.CallFrame frame, Object throwable)
private static Interpreter.CallFrame	processThrowable(Context cx, Object throwable, Interpreter.CallFrame frame, int indexReg, boolean instructionCounting)
static Object	restartContinuation(NativeContinuation c, Context cx, Scriptable scope, Object[] args)
static Object	resumeGenerator(Context cx, Scriptable scope, int operation, Object savedState, Object value)
private static void	setCallResult(Interpreter.CallFrame frame, Object callResult, double callResultDbl)
void	setEvalScriptFlag(Script script)	Mark the given script to indicate it was created by a call to eval() or to a Function constructor.
private static boolean	stack_boolean(Interpreter.CallFrame frame, int i)
private static double	stack_double(Interpreter.CallFrame frame, int i)
private static int	stack_int32(Interpreter.CallFrame frame, int i)
private static Number	stack_numeric(Interpreter.CallFrame frame, int i)
private static Object	thawGenerator(Interpreter.CallFrame frame, int stackTop, Interpreter.GeneratorState generatorState, int op)

Methods inherited from class org.htmlunit.corejs.javascript.Icode

bytecodeName, validBytecode, validIcode, validTokenCode

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

itsData

InterpreterData itsData

EXCEPTION_TRY_START_SLOT

static final int EXCEPTION_TRY_START_SLOT

See Also:

• Constant Field Values

EXCEPTION_TRY_END_SLOT

static final int EXCEPTION_TRY_END_SLOT

See Also:

• Constant Field Values

EXCEPTION_HANDLER_SLOT

static final int EXCEPTION_HANDLER_SLOT

See Also:

• Constant Field Values

EXCEPTION_TYPE_SLOT

static final int EXCEPTION_TYPE_SLOT

See Also:

• Constant Field Values

EXCEPTION_LOCAL_SLOT

static final int EXCEPTION_LOCAL_SLOT

See Also:

• Constant Field Values

EXCEPTION_SCOPE_SLOT

static final int EXCEPTION_SCOPE_SLOT

See Also:

• Constant Field Values

EXCEPTION_SLOT_SIZE

static final int EXCEPTION_SLOT_SIZE

See Also:

• Constant Field Values

Constructor Details

Interpreter

public Interpreter()

Method Details

compareIdata

private static boolean compareIdata(InterpreterData i1,
 InterpreterData i2)

captureFrameForGenerator

private static Interpreter.CallFrame captureFrameForGenerator(Interpreter.CallFrame frame)

compile

public Object compile(CompilerEnvirons compilerEnv,
 ScriptNode tree,
 String encodedSource,
 boolean returnFunction)

Description copied from interface: Evaluator

Compile the script or function from intermediate representation tree into an executable form.

Specified by:

compile in interface Evaluator

Parameters:

compilerEnv - Compiler environment

tree - parse tree

encodedSource - encoding of the source code for decompilation

returnFunction - if true, compiling a function

Returns:

an opaque object that can be passed to either createFunctionObject or createScriptObject, depending on the value of returnFunction

createScriptObject

public Script createScriptObject(Object bytecode,
 Object staticSecurityDomain)

Description copied from interface: Evaluator

Create a script object.

Specified by:

createScriptObject in interface Evaluator

Parameters:

bytecode - opaque object returned by compile

staticSecurityDomain - security domain

Returns:

Script object that can be evaluated

setEvalScriptFlag

public void setEvalScriptFlag(Script script)

Description copied from interface: Evaluator

Mark the given script to indicate it was created by a call to eval() or to a Function constructor.

Specified by:

setEvalScriptFlag in interface Evaluator

Parameters:

script - script to mark as from eval

createFunctionObject

public Function createFunctionObject(Context cx,
 Scriptable scope,
 Object bytecode,
 Object staticSecurityDomain)

Description copied from interface: Evaluator

Create a function object.

Specified by:

createFunctionObject in interface Evaluator

Parameters:

cx - Current context

scope - scope of the function

bytecode - opaque object returned by compile

staticSecurityDomain - security domain

Returns:

Function object that can be called

getShort

private static int getShort(byte[] iCode,
 int pc)

getIndex

private static int getIndex(byte[] iCode,
 int pc)

getInt

private static int getInt(byte[] iCode,
 int pc)

getExceptionHandler

private static int getExceptionHandler(Interpreter.CallFrame frame,
 boolean onlyFinally)

dumpICode

static void dumpICode(InterpreterData idata)

bytecodeSpan

private static int bytecodeSpan(int bytecode)

getLineNumbers

static int[] getLineNumbers(InterpreterData data)

captureStackInfo

public void captureStackInfo(RhinoException ex)

Description copied from interface: Evaluator

Capture stack information from the given exception.

Specified by:

captureStackInfo in interface Evaluator

Parameters:

ex - an exception thrown during execution

getSourcePositionFromStack

public String getSourcePositionFromStack(Context cx,
 int[] linep)

Description copied from interface: Evaluator

Get the source position information by examining the stack.

Specified by:

getSourcePositionFromStack in interface Evaluator

Parameters:

cx - Context

linep - Array object of length >= 1; getSourcePositionFromStack will assign the line number to linep[0].

Returns:

the name of the file or other source container

getPatchedStack

public String getPatchedStack(RhinoException ex,
 String nativeStackTrace)

Description copied from interface: Evaluator

Given a native stack trace, patch it with script-specific source and line information

Specified by:

getPatchedStack in interface Evaluator

Parameters:

ex - exception

nativeStackTrace - the native stack trace

Returns:

patched stack trace

getScriptStack

public List<String> getScriptStack(RhinoException ex)

Description copied from interface: Evaluator

Get the script stack for the given exception

Specified by:

getScriptStack in interface Evaluator

Parameters:

ex - exception from execution

Returns:

list of strings for the stack trace

getScriptStackElements

public ScriptStackElement[][] getScriptStackElements(RhinoException ex)

getEncodedSource

static String getEncodedSource(InterpreterData idata)

initFunction

private static void initFunction(Context cx,
 Scriptable scope,
 InterpretedFunction parent,
 int index)

interpret

static Object interpret(InterpretedFunction ifun,
 Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

resumeGenerator

public static Object resumeGenerator(Context cx,
 Scriptable scope,
 int operation,
 Object savedState,
 Object value)

restartContinuation

public static Object restartContinuation(NativeContinuation c,
 Context cx,
 Scriptable scope,
 Object[] args)

interpretLoop

private static Object interpretLoop(Context cx,
 Interpreter.CallFrame frame,
 Object throwable)

doInOrInstanceof

private static int doInOrInstanceof(Context cx,
 int op,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doCompare

private static int doCompare(Interpreter.CallFrame frame,
 int op,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doBitOp

private static int doBitOp(Interpreter.CallFrame frame,
 int op,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doBitNOT

private static int doBitNOT(Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doDelName

private static int doDelName(Context cx,
 Interpreter.CallFrame frame,
 int op,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doGetElem

private static int doGetElem(Context cx,
 Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doSetElem

private static int doSetElem(Context cx,
 Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doElemIncDec

private static int doElemIncDec(Context cx,
 Interpreter.CallFrame frame,
 byte[] iCode,
 Object[] stack,
 double[] sDbl,
 int stackTop)

doCallSpecial

private static int doCallSpecial(Context cx,
 Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 byte[] iCode,
 int indexReg)

doSetConstVar

private static int doSetConstVar(Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 Object[] vars,
 double[] varDbls,
 int[] varAttributes,
 int indexReg)

doSetVar

private static int doSetVar(Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 Object[] vars,
 double[] varDbls,
 int[] varAttributes,
 int indexReg)

doGetVar

private static int doGetVar(Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 Object[] vars,
 double[] varDbls,
 int indexReg)

doVarIncDec

private static int doVarIncDec(Context cx,
 Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 Object[] vars,
 double[] varDbls,
 int[] varAttributes,
 int indexReg)

doRefMember

private static int doRefMember(Context cx,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 int flags)

doRefNsMember

private static int doRefNsMember(Context cx,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 int flags)

doRefNsName

private static int doRefNsName(Context cx,
 Interpreter.CallFrame frame,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 int flags)

initFrameForNoSuchMethod

private static Interpreter.CallFrame initFrameForNoSuchMethod(Context cx,
 Interpreter.CallFrame frame,
 int indexReg,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 int op,
 Scriptable funThisObj,
 Scriptable calleeScope,
 ScriptRuntime.NoSuchMethodShim noSuchMethodShim,
 InterpretedFunction ifun)

Call __noSuchMethod__.

doEquals

private static boolean doEquals(Object[] stack,
 double[] sDbl,
 int stackTop)

doShallowEquals

private static boolean doShallowEquals(Object[] stack,
 double[] sDbl,
 int stackTop)

processThrowable

private static Interpreter.CallFrame processThrowable(Context cx,
 Object throwable,
 Interpreter.CallFrame frame,
 int indexReg,
 boolean instructionCounting)

freezeGenerator

private static Object freezeGenerator(Context cx,
 Interpreter.CallFrame frame,
 int stackTop,
 Interpreter.GeneratorState generatorState,
 boolean yieldStar)

thawGenerator

private static Object thawGenerator(Interpreter.CallFrame frame,
 int stackTop,
 Interpreter.GeneratorState generatorState,
 int op)

initFrameForApplyOrCall

private static Interpreter.CallFrame initFrameForApplyOrCall(Context cx,
 Interpreter.CallFrame frame,
 int indexReg,
 Object[] stack,
 double[] sDbl,
 int stackTop,
 int op,
 Scriptable calleeScope,
 IdFunctionObject ifun,
 InterpretedFunction iApplyCallable)

initFrame

private static Interpreter.CallFrame initFrame(Context cx,
 Scriptable callerScope,
 Scriptable thisObj,
 Object[] args,
 double[] argsDbl,
 int argShift,
 int argCount,
 InterpretedFunction fnOrScript,
 Interpreter.CallFrame parentFrame)

enterFrame

private static void enterFrame(Context cx,
 Interpreter.CallFrame frame,
 Object[] args,
 boolean continuationRestart)

exitFrame

private static void exitFrame(Context cx,
 Interpreter.CallFrame frame,
 Object throwable)

setCallResult

private static void setCallResult(Interpreter.CallFrame frame,
 Object callResult,
 double callResultDbl)

captureContinuation

public static NativeContinuation captureContinuation(Context cx)

captureContinuation

private static NativeContinuation captureContinuation(Context cx,
 Interpreter.CallFrame frame,
 boolean requireContinuationsTopFrame)

stack_int32

private static int stack_int32(Interpreter.CallFrame frame,
 int i)

stack_double

private static double stack_double(Interpreter.CallFrame frame,
 int i)

stack_numeric

private static Number stack_numeric(Interpreter.CallFrame frame,
 int i)

stack_boolean

private static boolean stack_boolean(Interpreter.CallFrame frame,
 int i)

doAdd

private static void doAdd(Object[] stack,
 double[] sDbl,
 int stackTop,
 Context cx)

doArithmetic

private static int doArithmetic(Interpreter.CallFrame frame,
 int op,
 Object[] stack,
 double[] sDbl,
 int stackTop)

getArgsArray

private static Object[] getArgsArray(Object[] stack,
 double[] sDbl,
 int shift,
 int count)

addInstructionCount

private static void addInstructionCount(Context cx,
 Interpreter.CallFrame frame,
 int extra)