Package org.htmlunit.corejs.javascript.optimizer

Class Codegen

  • All Implemented Interfaces:
    Evaluator
    public class Codegen
extends java.lang.Object
implements Evaluator
    This class generates code for a given IR tree.

    • Field Detail

      • DEFAULT_MAIN_METHOD_CLASS

        static final java.lang.String DEFAULT_MAIN_METHOD_CLASS
        See Also:
        Constant Field Values

      • SUPER_CLASS_NAME

        private static final java.lang.String SUPER_CLASS_NAME
        See Also:
        Constant Field Values

      • REGEXP_INIT_METHOD_NAME

        static final java.lang.String REGEXP_INIT_METHOD_NAME
        See Also:
        Constant Field Values

      • REGEXP_INIT_METHOD_SIGNATURE

        static final java.lang.String REGEXP_INIT_METHOD_SIGNATURE
        See Also:
        Constant Field Values

      • TEMPLATE_LITERAL_INIT_METHOD_NAME

        static final java.lang.String TEMPLATE_LITERAL_INIT_METHOD_NAME
        See Also:
        Constant Field Values

      • TEMPLATE_LITERAL_INIT_METHOD_SIGNATURE

        static final java.lang.String TEMPLATE_LITERAL_INIT_METHOD_SIGNATURE
        See Also:
        Constant Field Values

      • FUNCTION_INIT_SIGNATURE

        static final java.lang.String FUNCTION_INIT_SIGNATURE
        See Also:
        Constant Field Values

      • FUNCTION_CONSTRUCTOR_SIGNATURE

        static final java.lang.String FUNCTION_CONSTRUCTOR_SIGNATURE
        See Also:
        Constant Field Values

      • globalLock

        private static final java.lang.Object globalLock

      • globalSerialClassCounter

        private static int globalSerialClassCounter

      • directCallTargets

        private ObjArray directCallTargets

      • scriptOrFnIndexes

        private ObjToIntMap scriptOrFnIndexes

      • mainMethodClass

        private java.lang.String mainMethodClass

      • mainClassName

        java.lang.String mainClassName

      • mainClassSignature

        java.lang.String mainClassSignature

      • itsConstantList

        private double[] itsConstantList

      • itsConstantListSize

        private int itsConstantListSize

    • Constructor Detail

      • Codegen

        public Codegen()

    • Method Detail

      • 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 java.lang.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 java.lang.String getPatchedStack​(RhinoException ex,
                                        java.lang.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 java.util.List<java.lang.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

      • 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

      • compile

        public java.lang.Object compile​(CompilerEnvirons compilerEnv,
                                ScriptNode tree,
                                java.lang.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​(java.lang.Object bytecode,
                                 java.lang.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

      • createFunctionObject

        public Function createFunctionObject​(Context cx,
                                     Scriptable scope,
                                     java.lang.Object bytecode,
                                     java.lang.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

      • defineClass

        private java.lang.Class<?> defineClass​(java.lang.Object bytecode,
                                       java.lang.Object staticSecurityDomain)

      • compileToClassFile

        public byte[] compileToClassFile​(CompilerEnvirons compilerEnv,
                                 java.lang.String mainClassName,
                                 ScriptNode scriptOrFn,
                                 java.lang.String encodedSource,
                                 boolean returnFunction)

      • transform

        private void transform​(ScriptNode tree)

      • initOptFunctions_r

        private static void initOptFunctions_r​(ScriptNode scriptOrFn)

      • initScriptNodesData

        private void initScriptNodesData​(ScriptNode scriptOrFn)

      • collectScriptNodes_r

        private static void collectScriptNodes_r​(ScriptNode n,
                                         ObjArray x)

      • generateCode

        private byte[] generateCode​(java.lang.String encodedSource)

      • isGenerator

        static boolean isGenerator​(ScriptNode node)

      • generateResumeGenerator

        private void generateResumeGenerator​(ClassFileWriter cfw)

      • generateCallMethod

        private void generateCallMethod​(ClassFileWriter cfw,
                                boolean isStrictMode)

      • generateExecute

        private static void generateExecute​(ClassFileWriter cfw)

      • generateScriptCtor

        private static void generateScriptCtor​(ClassFileWriter cfw)

      • generateFunctionConstructor

        private void generateFunctionConstructor​(ClassFileWriter cfw)

      • generateNativeFunctionOverrides

        private void generateNativeFunctionOverrides​(ClassFileWriter cfw,
                                             java.lang.String encodedSource)

      • emitTemplateLiteralInit

        private void emitTemplateLiteralInit​(ClassFileWriter cfw)
        Overview: 
         for each fn in functions(script) do
   let field = []
   for each templateLiteral in templateLiterals(fn) do
     let values = concat([[cooked(s), raw(s)] | s <- strings(templateLiteral)])
     field.push(values)
   end
   class[getTemplateLiteralName(fn)] = field
 end

      • emitConstantDudeInitializers

        private void emitConstantDudeInitializers​(ClassFileWriter cfw)

      • pushNumberAsObject

        void pushNumberAsObject​(ClassFileWriter cfw,
                        double num)

      • addDoubleWrap

        private static void addDoubleWrap​(ClassFileWriter cfw)

      • getStaticConstantWrapperType

        private static java.lang.String getStaticConstantWrapperType​(double num)

      • getDirectCtorName

        java.lang.String getDirectCtorName​(ScriptNode n)

      • getBodyMethodName

        java.lang.String getBodyMethodName​(ScriptNode n)

      • cleanName

        java.lang.String cleanName​(ScriptNode n)
        Gets a Java-compatible "informative" name for the the ScriptOrFnNode

      • getBodyMethodSignature

        java.lang.String getBodyMethodSignature​(ScriptNode n)

      • getFunctionInitMethodName

        java.lang.String getFunctionInitMethodName​(OptFunctionNode ofn)

      • getCompiledRegexpName

        java.lang.String getCompiledRegexpName​(ScriptNode n,
                                       int regexpIndex)

      • getTemplateLiteralName

        java.lang.String getTemplateLiteralName​(ScriptNode n)

      • badTree

        static java.lang.RuntimeException badTree()

      • setMainMethodClass

        public void setMainMethodClass​(java.lang.String className)