mirror of
https://github.com/i-net-software/JWebAssembly.git
synced 2025-03-25 15:37:52 +01:00
1231 lines
49 KiB
Java
1231 lines
49 KiB
Java
/*
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* Copyright 2017 - 2018 Volker Berlin (i-net software)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package de.inetsoftware.jwebassembly.module;
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import java.io.Closeable;
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import java.io.IOException;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.function.Consumer;
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import javax.annotation.Nonnegative;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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import de.inetsoftware.classparser.Annotations;
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import de.inetsoftware.classparser.ClassFile;
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import de.inetsoftware.classparser.Code;
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import de.inetsoftware.classparser.CodeInputStream;
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import de.inetsoftware.classparser.ConstantPool;
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import de.inetsoftware.classparser.ConstantRef;
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import de.inetsoftware.classparser.MethodInfo;
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import de.inetsoftware.jwebassembly.WasmException;
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/**
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* Module Writer for text format with S-expressions.
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*
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* @author Volker Berlin
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*/
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public abstract class ModuleWriter implements Closeable {
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private int paramCount;
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private LocaleVariableManager localVariables = new LocaleVariableManager();
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private String sourceFile;
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private BranchManger branchManager = new BranchManger();
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private ValueStackManger stackManager = new ValueStackManger();
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/**
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* Prepare the content of the class.
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*
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* @param classFile
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* the class file
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* @throws WasmException
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* if some Java code can't converted
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*/
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public void prepare( ClassFile classFile ) {
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iterateMethods( classFile, m -> prepareMethod( m ) );
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}
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/**
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* Write the content of the class to the writer.
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*
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* @param classFile
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* the class file
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* @throws WasmException
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* if some Java code can't converted
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*/
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public void write( ClassFile classFile ) throws WasmException {
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iterateMethods( classFile, m -> writeMethod( m ) );
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}
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private void iterateMethods( ClassFile classFile, Consumer<MethodInfo> handler ) throws WasmException {
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sourceFile = null; // clear previous value for the case an IO exception occur
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try {
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sourceFile = classFile.getSourceFile();
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if( sourceFile == null ) {
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sourceFile = classFile.getThisClass().getName();
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}
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MethodInfo[] methods = classFile.getMethods();
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for( MethodInfo method : methods ) {
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Code code = method.getCode();
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if( method.getName().equals( "<init>" ) && method.getDescription().equals( "()V" )
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&& code.isSuperInitReturn( classFile.getSuperClass() ) ) {
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continue; //default constructor
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}
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handler.accept( method );
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}
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} catch( IOException ioex ) {
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throw WasmException.create( ioex, sourceFile, -1 );
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}
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}
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/**
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* Prepare the method.
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*
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* @param method
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* the method
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* @throws WasmException
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* if some Java code can't converted
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*/
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protected void prepareMethod( MethodInfo method ) throws WasmException {
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// Nothing
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}
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/**
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* Write the content of a method.
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*
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* @param method
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* the method
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* @throws WasmException
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* if some Java code can't converted
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*/
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private void writeMethod( MethodInfo method ) throws WasmException {
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int lineNumber = -1;
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try {
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Code code = method.getCode();
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if( code != null ) { // abstract methods and interface methods does not have code
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String methodName = method.getName();
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String className = method.getDeclaringClassFile().getThisClass().getName();
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String fullName = className + '.' + methodName;
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String signatureName = fullName + method.getDescription();
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writeExport( signatureName, fullName, method );
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writeMethodStart( signatureName, fullName );
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writeMethodSignature( method );
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localVariables.reset();
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stackManager.reset();
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branchManager.reset();
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for( CodeInputStream byteCode : code.getByteCodes() ) {
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prepareCodeChunk( byteCode, lineNumber = byteCode.getLineNumber() );
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}
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branchManager.calculate();
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localVariables.calculate();
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CodeInputStream byteCode = null;
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Iterator<CodeInputStream> byteCodes = code.getByteCodes().iterator();
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while( byteCodes.hasNext() ) {
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byteCode = byteCodes.next();
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writeCodeChunk( byteCode, lineNumber = byteCode.getLineNumber(), method.getConstantPool() );
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}
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branchManager.handle( byteCode, this ); // write the last end operators
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writeMethodFinish( localVariables.getLocalTypes( paramCount ) );
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}
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} catch( Exception ioex ) {
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throw WasmException.create( ioex, sourceFile, lineNumber );
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}
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}
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/**
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* Look for a Export annotation and if there write an export directive.
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*
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* @param signatureName
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* the full name with signature
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* @param methodName
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* the normalized method name
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* @param method
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* the moethod
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*
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* @throws IOException
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* if any IOException occur
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*/
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private void writeExport( String signatureName, String methodName, MethodInfo method ) throws IOException {
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Annotations annotations = method.getRuntimeInvisibleAnnotations();
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if( annotations != null ) {
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Map<String,Object> export = annotations.get( "org.webassembly.annotation.Export" );
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if( export != null ) {
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String exportName = (String)export.get( "name" );
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if( exportName == null ) {
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exportName = method.getName(); // TODO naming conversion rule if no name was set
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}
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writeExport( signatureName, methodName, exportName );
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}
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}
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}
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/**
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* Write an export directive
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* @param signatureName
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* the full name with signature
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* @param methodName
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* the method name
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* @param exportName
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* the export name, if null then the same like the method name
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*
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* @throws IOException
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* if any I/O error occur
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*/
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protected abstract void writeExport( String signatureName, String methodName, String exportName ) throws IOException;
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/**
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* Write the method header.
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* @param signatureName
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* the full name with signature
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* @param name
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* the method name
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*
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* @throws IOException
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* if any I/O error occur
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*/
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protected abstract void writeMethodStart( String signatureName, String name ) throws IOException;
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/**
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* Write the parameter and return signatures
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*
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* @param method
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* the method
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* @throws IOException
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* if any I/O error occur
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* @throws WasmException
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* if some Java code can't converted
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*/
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private void writeMethodSignature( MethodInfo method ) throws IOException, WasmException {
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String signature = method.getDescription();
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String kind = "param";
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int paramCount = 0;
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for( int i = 1; i < signature.length(); i++ ) {
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paramCount++;
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String javaType;
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switch( signature.charAt( i ) ) {
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case '[': // array
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javaType = "array";
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break;
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case 'L':
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javaType = "object";
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break;
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case 'B': // byte
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case 'C': // char
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case 'S': // short
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case 'I': // int
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writeMethodParam( kind, ValueType.i32 );
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continue;
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case 'D': // double
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writeMethodParam( kind, ValueType.f64 );
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continue;
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case 'F': // float
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writeMethodParam( kind, ValueType.f32 );
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continue;
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case 'J': // long
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writeMethodParam( kind, ValueType.i64 );
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continue;
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case 'V': // void
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continue;
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case ')':
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this.paramCount = paramCount - 1;
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kind = "result";
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continue;
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default:
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javaType = signature.substring( i, i + 1 );
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}
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int lineNumber = method.getCode().getFirstLineNr();
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throw new WasmException( "Not supported Java data type in method signature: " + javaType, sourceFile, lineNumber );
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}
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}
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/**
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* Write a method parameter.
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*
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* @param kind
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* "param", "result" or "local"
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* @param valueType
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* the data type of the parameter
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* @throws IOException
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* if any I/O error occur
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*/
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protected abstract void writeMethodParam( String kind, ValueType valueType ) throws IOException;
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/**
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* Complete the method
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*
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* @param locals
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* a list with types of local variables
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*
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* @throws IOException
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* if any I/O error occur
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*/
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protected abstract void writeMethodFinish( List<ValueType> locals ) throws IOException;
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/**
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* Analyze and prepare a chunk of byte code.
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*
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* @param byteCode
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* a stream of byte code
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* @param lineNumber
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* the current line number
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* @throws WasmException
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* if some Java code can't converted
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*/
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private void prepareCodeChunk( CodeInputStream byteCode, int lineNumber ) throws WasmException {
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try {
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while( byteCode.available() > 0 ) {
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int codePosition = byteCode.getCodePosition();
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int op = byteCode.readUnsignedByte();
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switch( op ) {
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case 2: // iconst_m1
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case 3: // iconst_0
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case 4: // iconst_1
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case 5: // iconst_2
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case 6: // iconst_3
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case 7: // iconst_4
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case 8: // iconst_5
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stackManager.add( ValueType.i32, codePosition );
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break;
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case 9: // lconst_0
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case 10: // lconst_1
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stackManager.add( ValueType.i64, codePosition );
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break;
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case 11: // fconst_0
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case 12: // fconst_1
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case 13: // fconst_2
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stackManager.add( ValueType.f32, codePosition );
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break;
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case 14: // dconst_0
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case 15: // dconst_1
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stackManager.add( ValueType.f64, codePosition );
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break;
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case 16: // bipush
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stackManager.add( ValueType.i32, codePosition );
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byteCode.skip(1);
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break;
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case 17: // sipush
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stackManager.add( ValueType.i32, codePosition );
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byteCode.skip(2);
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break;
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case 18: // ldc
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stackManager.add( null, codePosition );
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byteCode.skip(1);
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break;
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case 19: // ldc_w
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case 20: // ldc2_w
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stackManager.add( null, codePosition );
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byteCode.skip(2);
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break;
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case 21: // iload
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stackManager.add( ValueType.i32, codePosition );
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localVariables.use( ValueType.i32, byteCode.readUnsignedByte() );
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break;
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case 22: // lload
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stackManager.add( ValueType.i64, codePosition );
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localVariables.use( ValueType.i64, byteCode.readUnsignedByte() );
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break;
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case 23: // fload
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stackManager.add( ValueType.f32, codePosition );
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localVariables.use( ValueType.f32, byteCode.readUnsignedByte() );
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break;
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case 24: // dload
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stackManager.add( ValueType.f64, codePosition );
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localVariables.use( ValueType.f64, byteCode.readUnsignedByte() );
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break;
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case 26: // iload_0
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case 27: // iload_1
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case 28: // iload_2
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case 29: // iload_3
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stackManager.add( ValueType.i32, codePosition );
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localVariables.use( ValueType.i32, op - 26 );
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break;
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case 30: // lload_0
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case 31: // lload_1
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case 32: // lload_2
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case 33: // lload_3
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stackManager.add( ValueType.i64, codePosition );
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localVariables.use( ValueType.i64, op - 30 );
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break;
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case 34: // fload_0
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case 35: // fload_1
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case 36: // fload_2
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case 37: // fload_3
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stackManager.add( ValueType.f32, codePosition );
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localVariables.use( ValueType.f32, op - 34 );
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break;
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case 38: // dload_0
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case 39: // dload_1
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case 40: // dload_2
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case 41: // dload_3
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stackManager.add( ValueType.f64, codePosition );
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localVariables.use( ValueType.f64, op - 38 );
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break;
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case 54: // istore
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stackManager.remove();
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localVariables.use( ValueType.i32, byteCode.readUnsignedByte() );
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break;
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case 55: // lstore
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stackManager.remove();
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localVariables.use( ValueType.i64, byteCode.readUnsignedByte() );
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break;
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case 56: // fstore
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stackManager.remove();
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localVariables.use( ValueType.f32, byteCode.readUnsignedByte() );
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break;
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case 57: // dstore
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stackManager.remove();
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localVariables.use( ValueType.f64, byteCode.readUnsignedByte() );
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break;
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case 59: // istore_0
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case 60: // istore_1
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case 61: // istore_2
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case 62: // istore_3
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stackManager.remove();
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localVariables.use( ValueType.i32, op - 59 );
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break;
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case 63: // lstore_0
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case 64: // lstore_1
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case 65: // lstore_2
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case 66: // lstore_3
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stackManager.remove();
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localVariables.use( ValueType.i64, op - 63 );
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break;
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case 67: // fstore_0
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case 68: // fstore_1
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case 69: // fstore_2
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case 70: // fstore_3
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stackManager.remove();
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localVariables.use( ValueType.f32, op - 67 );
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break;
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case 71: // dstore_0
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case 72: // dstore_1
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case 73: // dstore_2
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case 74: // dstore_3
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stackManager.remove();
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localVariables.use( ValueType.f64, op - 71 );
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break;
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case 87: // pop
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case 88: // pop2
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stackManager.remove();
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break;
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case 25: //aload
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case 58: // astore
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case 179: // putstatic
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case 181: // putfield
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byteCode.skip(1);
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break;
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case 132: // iinc
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case 184: // invokestatic
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byteCode.skip( 2);
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break;
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case 153: // ifeq
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case 154: // ifne
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case 155: // iflt
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case 156: // ifge
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case 157: // ifgt
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case 158: // ifle
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case 159: // if_icmpeq
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case 160: // if_icmpne
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case 161: // if_icmplt
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case 162: // if_icmpge
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case 163: // if_icmpgt
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case 164: // if_icmple
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case 165: // if_acmpeq
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case 166: // if_acmpne
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int offset = byteCode.readShort();
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branchManager.start( JavaBlockOperator.IF, codePosition + 3, offset - 3, lineNumber );
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break;
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case 167: // goto
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offset = byteCode.readShort();
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branchManager.start( JavaBlockOperator.GOTO, codePosition, offset, lineNumber );
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break;
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case 170: // tableswitch
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case 171: // lookupswitch
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prepareSwitchCode( byteCode, op == 171, lineNumber );
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break;
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}
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}
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} catch( Exception ex ) {
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throw WasmException.create( ex, sourceFile, lineNumber );
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}
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}
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/**
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* Prepare the both switch operation codes.
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*
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* @param byteCode
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* the current stream with a position after the operation code
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* @param isLookupSwitch
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* true, if the operation was a loopupswitch; false, if the operation was a tableswitch
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* @param lineNumber
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* the current line number
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* @throws IOException
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* if any I/O error occur
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*/
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private void prepareSwitchCode( CodeInputStream byteCode, boolean isLookupSwitch, int lineNumber ) throws IOException {
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int startPosition = byteCode.getCodePosition();
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int padding = startPosition % 4;
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if( padding > 0 ) {
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byteCode.skip( 4 - padding );
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}
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startPosition--;
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int defaultPosition = startPosition + byteCode.readInt();
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int[] keys;
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int[] positions;
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if( isLookupSwitch ) { // lookupswitch
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localVariables.useTempI32();
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int nPairs = byteCode.readInt();
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keys = new int[nPairs];
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positions = new int[nPairs];
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for( int i = 0; i < nPairs; i++ ) {
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keys[i] = byteCode.readInt();
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positions[i] = startPosition + byteCode.readInt();
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}
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} else {
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int low = byteCode.readInt();
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keys = null;
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int count = byteCode.readInt() - low + 1;
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positions = new int[count];
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for( int i = 0; i < count; i++ ) {
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positions[i] = startPosition + byteCode.readInt();
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}
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}
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int switchValuestartPosition = stackManager.getCodePosition( 0 );
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branchManager.startSwitch( switchValuestartPosition, 0, lineNumber, keys, positions, defaultPosition );
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}
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|
|
/**
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|
* Write a chunk of byte code.
|
|
*
|
|
* @param byteCode
|
|
* a stream of byte code
|
|
* @param lineNumber
|
|
* the current line number
|
|
* @param constantPool
|
|
* the constant pool of the the current class
|
|
* @throws WasmException
|
|
* if some Java code can't converted
|
|
*/
|
|
private void writeCodeChunk( CodeInputStream byteCode, int lineNumber, ConstantPool constantPool ) throws WasmException {
|
|
try {
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|
while( byteCode.available() > 0 ) {
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|
branchManager.handle( byteCode, this );
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|
int op = byteCode.readUnsignedByte();
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|
switch( op ) {
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|
case 0: // nop
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break;
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//TODO case 1: // aconst_null
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case 2: // iconst_m1
|
|
case 3: // iconst_0
|
|
case 4: // iconst_1
|
|
case 5: // iconst_2
|
|
case 6: // iconst_3
|
|
case 7: // iconst_4
|
|
case 8: // iconst_5
|
|
writeConstInt( op - 3 );
|
|
break;
|
|
case 9: // lconst_0
|
|
case 10: // lconst_1
|
|
writeConstLong( op - 9 );
|
|
break;
|
|
case 11: // fconst_0
|
|
case 12: // fconst_1
|
|
case 13: // fconst_2
|
|
writeConstFloat( op - 11 );
|
|
break;
|
|
case 14: // dconst_0
|
|
case 15: // dconst_1
|
|
writeConstDouble( op - 14 );
|
|
break;
|
|
case 16: // bipush
|
|
writeConstInt( byteCode.readByte() );
|
|
break;
|
|
case 17: // sipush
|
|
writeConstInt( byteCode.readShort() );
|
|
break;
|
|
case 18: // ldc
|
|
writeConst( constantPool.get( byteCode.readUnsignedByte() ) );
|
|
break;
|
|
case 19: // ldc_w
|
|
case 20: // ldc2_w
|
|
writeConst( constantPool.get( byteCode.readUnsignedShort() ) );
|
|
break;
|
|
case 21: // iload
|
|
writeLoadStore( true, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 22: // lload
|
|
writeLoadStore( true, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 23: // fload
|
|
writeLoadStore( true, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 24: // dload
|
|
writeLoadStore( true, byteCode.readUnsignedByte() );
|
|
break;
|
|
//TODO case 25: // aload
|
|
case 26: // iload_0
|
|
case 27: // iload_1
|
|
case 28: // iload_2
|
|
case 29: // iload_3
|
|
writeLoadStore( true, op - 26 );
|
|
break;
|
|
case 30: // lload_0
|
|
case 31: // lload_1
|
|
case 32: // lload_2
|
|
case 33: // lload_3
|
|
writeLoadStore( true, op - 30 );
|
|
break;
|
|
case 34: // fload_0
|
|
case 35: // fload_1
|
|
case 36: // fload_2
|
|
case 37: // fload_3
|
|
writeLoadStore( true, op - 34 );
|
|
break;
|
|
case 38: // dload_0
|
|
case 39: // dload_1
|
|
case 40: // dload_2
|
|
case 41: // dload_3
|
|
writeLoadStore( true, op - 38 );
|
|
break;
|
|
case 54: // istore
|
|
writeLoadStore( false, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 55: // lstore
|
|
writeLoadStore( false, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 56: // fstore
|
|
writeLoadStore( false, byteCode.readUnsignedByte() );
|
|
break;
|
|
case 57: // dstore
|
|
writeLoadStore( false, byteCode.readUnsignedByte() );
|
|
break;
|
|
//TODO case 58: // astore
|
|
case 59: // istore_0
|
|
case 60: // istore_1
|
|
case 61: // istore_2
|
|
case 62: // istore_3
|
|
writeLoadStore( false, op - 59 );
|
|
break;
|
|
case 63: // lstore_0
|
|
case 64: // lstore_1
|
|
case 65: // lstore_2
|
|
case 66: // lstore_3
|
|
writeLoadStore( false, op - 63 );
|
|
break;
|
|
case 67: // fstore_0
|
|
case 68: // fstore_1
|
|
case 69: // fstore_2
|
|
case 70: // fstore_3
|
|
writeLoadStore( false, op - 67 );
|
|
break;
|
|
case 71: // dstore_0
|
|
case 72: // dstore_1
|
|
case 73: // dstore_2
|
|
case 74: // dstore_3
|
|
writeLoadStore( false, op - 71 );
|
|
break;
|
|
case 87: // pop
|
|
case 88: // pop2
|
|
writeBlockCode( WasmBlockOperator.DROP, null );
|
|
break;
|
|
case 89: // dup: duplicate the value on top of the stack
|
|
case 90: // dup_x1
|
|
case 91: // dup_x2
|
|
case 92: // dup2
|
|
case 93: // dup2_x1
|
|
case 94: // dup2_x2
|
|
case 95: // swap
|
|
// can be do with functions with more as one return value in future WASM standard
|
|
throw new WasmException( "Stack duplicate is not supported in current WASM. try to save immediate values in a local variable: " + op, sourceFile, lineNumber );
|
|
case 96: // iadd
|
|
writeNumericOperator( NumericOperator.add, ValueType.i32);
|
|
break;
|
|
case 97: // ladd
|
|
writeNumericOperator( NumericOperator.add, ValueType.i64 );
|
|
break;
|
|
case 98: // fadd
|
|
writeNumericOperator( NumericOperator.add, ValueType.f32 );
|
|
break;
|
|
case 99: // dadd
|
|
writeNumericOperator( NumericOperator.add, ValueType.f64 );
|
|
break;
|
|
case 100: // isub
|
|
writeNumericOperator( NumericOperator.sub, ValueType.i32 );
|
|
break;
|
|
case 101: // lsub
|
|
writeNumericOperator( NumericOperator.sub, ValueType.i64 );
|
|
break;
|
|
case 102: // fsub
|
|
writeNumericOperator( NumericOperator.sub, ValueType.f32 );
|
|
break;
|
|
case 103: // dsub
|
|
writeNumericOperator( NumericOperator.sub, ValueType.f64 );
|
|
break;
|
|
case 104: // imul;
|
|
writeNumericOperator( NumericOperator.mul, ValueType.i32 );
|
|
break;
|
|
case 105: // lmul
|
|
writeNumericOperator( NumericOperator.mul, ValueType.i64 );
|
|
break;
|
|
case 106: // fmul
|
|
writeNumericOperator( NumericOperator.mul, ValueType.f32 );
|
|
break;
|
|
case 107: // dmul
|
|
writeNumericOperator( NumericOperator.mul, ValueType.f64 );
|
|
break;
|
|
case 108: // idiv
|
|
writeNumericOperator( NumericOperator.div, ValueType.i32 );
|
|
break;
|
|
case 109: // ldiv
|
|
writeNumericOperator( NumericOperator.div, ValueType.i64 );
|
|
break;
|
|
case 110: // fdiv
|
|
writeNumericOperator( NumericOperator.div, ValueType.f32 );
|
|
break;
|
|
case 111: // ddiv
|
|
writeNumericOperator( NumericOperator.div, ValueType.f64 );
|
|
break;
|
|
case 112: // irem
|
|
writeNumericOperator( NumericOperator.rem, ValueType.i32 );
|
|
break;
|
|
case 113: // lrem
|
|
writeNumericOperator( NumericOperator.rem, ValueType.i64 );
|
|
break;
|
|
case 114: // frem
|
|
case 115: // drem
|
|
//TODO can be implemented with a helper function like: (a - (long)(a / b) * (double)b)
|
|
throw new WasmException( "Modulo/Remainder for floating numbers is not supported in WASM. Use int or long data types." + op, sourceFile, lineNumber );
|
|
case 116: // ineg
|
|
writeConstInt( -1 );
|
|
writeNumericOperator( NumericOperator.mul, ValueType.i32 );
|
|
break;
|
|
case 117: // lneg
|
|
writeConstLong( -1 );
|
|
writeNumericOperator( NumericOperator.mul, ValueType.i64 );
|
|
break;
|
|
case 118: // fneg
|
|
writeNumericOperator( NumericOperator.neg, ValueType.f32 );
|
|
break;
|
|
case 119: // dneg
|
|
writeNumericOperator( NumericOperator.neg, ValueType.f64 );
|
|
break;
|
|
case 120: // ishl
|
|
writeNumericOperator( NumericOperator.shl, ValueType.i32 );
|
|
break;
|
|
case 121: // lshl
|
|
writeCast( ValueTypeConvertion.i2l ); // the shift parameter must be of type long!!!
|
|
writeNumericOperator( NumericOperator.shl, ValueType.i64 );
|
|
break;
|
|
case 122: // ishr
|
|
writeNumericOperator( NumericOperator.shr_s, ValueType.i32 );
|
|
break;
|
|
case 123: // lshr
|
|
writeCast( ValueTypeConvertion.i2l ); // the shift parameter must be of type long!!!
|
|
writeNumericOperator( NumericOperator.shr_s, ValueType.i64 );
|
|
break;
|
|
case 124: // iushr
|
|
writeNumericOperator( NumericOperator.shr_u, ValueType.i32 );
|
|
break;
|
|
case 125: // lushr
|
|
writeCast( ValueTypeConvertion.i2l ); // the shift parameter must be of type long!!!
|
|
writeNumericOperator( NumericOperator.shr_u, ValueType.i64 );
|
|
break;
|
|
case 126: // iand
|
|
writeNumericOperator( NumericOperator.and, ValueType.i32 );
|
|
break;
|
|
case 127: // land
|
|
writeNumericOperator( NumericOperator.and, ValueType.i64 );
|
|
break;
|
|
case 128: // ior
|
|
writeNumericOperator( NumericOperator.or, ValueType.i32 );
|
|
break;
|
|
case 129: // lor
|
|
writeNumericOperator( NumericOperator.or, ValueType.i64 );
|
|
break;
|
|
case 130: // ixor
|
|
writeNumericOperator( NumericOperator.xor, ValueType.i32 );
|
|
break;
|
|
case 131: // lxor
|
|
writeNumericOperator( NumericOperator.xor, ValueType.i64 );
|
|
break;
|
|
case 132: // iinc
|
|
int idx = byteCode.readUnsignedByte();
|
|
writeLoadStore( true, idx );
|
|
writeConstInt( byteCode.readUnsignedByte() );
|
|
writeNumericOperator( NumericOperator.add, ValueType.i32);
|
|
writeLoadStore( false, idx );
|
|
break;
|
|
case 133: // i2l
|
|
writeCast( ValueTypeConvertion.i2l );
|
|
break;
|
|
case 134: // i2f
|
|
writeCast( ValueTypeConvertion.i2f );
|
|
break;
|
|
case 135: // i2d
|
|
writeCast( ValueTypeConvertion.i2d );
|
|
break;
|
|
case 136: // l2i
|
|
writeCast( ValueTypeConvertion.l2i );
|
|
break;
|
|
case 137: // l2f
|
|
writeCast( ValueTypeConvertion.l2f );
|
|
break;
|
|
case 138: // l2d
|
|
writeCast( ValueTypeConvertion.l2d );
|
|
break;
|
|
case 139: // f2i
|
|
writeCast( ValueTypeConvertion.f2i );
|
|
break;
|
|
case 140: // f2l
|
|
writeCast( ValueTypeConvertion.f2l );
|
|
break;
|
|
case 141: // f2d
|
|
writeCast( ValueTypeConvertion.f2d );
|
|
break;
|
|
case 142: // d2i
|
|
writeCast( ValueTypeConvertion.d2i );
|
|
break;
|
|
case 143: // d2l
|
|
writeCast( ValueTypeConvertion.d2l );
|
|
break;
|
|
case 144: // d2f
|
|
writeCast( ValueTypeConvertion.d2f );
|
|
break;
|
|
case 145: // i2b
|
|
writeConstInt( 24 );
|
|
writeNumericOperator( NumericOperator.shl, ValueType.i32 );
|
|
writeConstInt( 24 );
|
|
writeNumericOperator( NumericOperator.shr_s, ValueType.i32 );
|
|
break;
|
|
case 146: // i2c
|
|
writeConstInt( 0xFFFF );
|
|
writeNumericOperator( NumericOperator.and, ValueType.i32 );
|
|
break;
|
|
case 147: // i2s
|
|
writeConstInt( 16 );
|
|
writeNumericOperator( NumericOperator.shl, ValueType.i32 );
|
|
writeConstInt( 16 );
|
|
writeNumericOperator( NumericOperator.shr_s, ValueType.i32 );
|
|
break;
|
|
case 148: // lcmp
|
|
opCompare( ValueType.i64, byteCode );
|
|
break;
|
|
case 149: // fcmpl
|
|
case 150: // fcmpg
|
|
opCompare( ValueType.f32, byteCode );
|
|
break;
|
|
case 151: // dcmpl
|
|
case 152: // dcmpg
|
|
opCompare( ValueType.f64, byteCode );
|
|
break;
|
|
case 153: // ifeq
|
|
opIfCondition( NumericOperator.ne, byteCode );
|
|
break;
|
|
case 154: // ifne
|
|
opIfCondition( NumericOperator.eq, byteCode );
|
|
break;
|
|
case 155: // iflt
|
|
opIfCondition( NumericOperator.gt, byteCode );
|
|
break;
|
|
case 156: // ifge
|
|
opIfCondition( NumericOperator.le_s, byteCode );
|
|
break;
|
|
case 157: // ifgt
|
|
opIfCondition( NumericOperator.lt_s, byteCode );
|
|
break;
|
|
case 158: // ifle
|
|
opIfCondition( NumericOperator.ge_s, byteCode );
|
|
break;
|
|
case 159: // if_icmpeq
|
|
opIfCompareCondition( NumericOperator.ne, byteCode );
|
|
break;
|
|
case 160: // if_icmpne
|
|
opIfCompareCondition( NumericOperator.eq, byteCode );
|
|
break;
|
|
case 161: // if_icmplt
|
|
opIfCompareCondition( NumericOperator.gt, byteCode );
|
|
break;
|
|
case 162: // if_icmpge
|
|
opIfCompareCondition( NumericOperator.le_s, byteCode );
|
|
break;
|
|
case 163: // if_icmpgt
|
|
opIfCompareCondition( NumericOperator.lt_s, byteCode );
|
|
break;
|
|
case 164: // if_icmple
|
|
opIfCompareCondition( NumericOperator.ge_s, byteCode );
|
|
break;
|
|
//TODO case 165: // if_acmpeq
|
|
//TODO case 166: // if_acmpne
|
|
case 167: // goto
|
|
byteCode.skip(2); // handle in the branch manager
|
|
break;
|
|
case 170: // tableswitch
|
|
case 171: // lookupswitch
|
|
writeSwitchCode( byteCode, op == 171 );
|
|
break;
|
|
case 172: // ireturn
|
|
case 173: // lreturn
|
|
case 174: // freturn
|
|
case 175: // dreturn
|
|
case 177: // return void
|
|
writeBlockCode( WasmBlockOperator.RETURN, null );
|
|
break;
|
|
case 184: // invokestatic
|
|
idx = byteCode.readUnsignedShort();
|
|
ConstantRef method = (ConstantRef)constantPool.get( idx );
|
|
writeFunctionCall( method.getConstantClass().getName() + '.' + method.getName() + method.getType() );
|
|
break;
|
|
default:
|
|
throw new WasmException( "Unimplemented Java byte code operation: " + op, sourceFile, lineNumber );
|
|
}
|
|
}
|
|
} catch( WasmException ex ) {
|
|
throw ex;
|
|
} catch( Exception ex ) {
|
|
throw WasmException.create( ex, sourceFile, lineNumber );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write the both switch operation codes
|
|
*
|
|
* @param byteCode
|
|
* the current stream with a position after the operation code
|
|
* @param isLookupSwitch
|
|
* true, if the operation was a loopupswitch; false, if the operation was a tableswitch
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
private void writeSwitchCode( CodeInputStream byteCode, boolean isLookupSwitch ) throws IOException {
|
|
int startPosition = byteCode.getCodePosition();
|
|
int padding = startPosition % 4;
|
|
if( padding > 0 ) {
|
|
byteCode.skip( 4 - padding );
|
|
}
|
|
startPosition--;
|
|
|
|
int defaultPosition = byteCode.readInt();
|
|
if( isLookupSwitch ) { // lookupswitch
|
|
int count = byteCode.readInt();
|
|
int[] keys = new int[count];
|
|
int[] positions = new int[count];
|
|
for( int i = 0; i < count; i++ ) {
|
|
keys[i] = byteCode.readInt();
|
|
positions[i] = byteCode.readInt();
|
|
}
|
|
int tempI32 = localVariables.getTempI32();
|
|
int block = 0;
|
|
int defaultBlock = -1;
|
|
int currentPos = -1;
|
|
writeLoadStore( false, tempI32 );
|
|
do {
|
|
int nextPos = findNext( currentPos, positions );
|
|
if( nextPos == currentPos ) {
|
|
break;
|
|
}
|
|
currentPos = nextPos;
|
|
if( defaultBlock < 0 ) {
|
|
if( defaultPosition <= currentPos ) {
|
|
defaultBlock = block;
|
|
if( defaultPosition < currentPos ) {
|
|
block++;
|
|
}
|
|
}
|
|
}
|
|
for( int i = 0; i < positions.length; i++ ) {
|
|
if( positions[i] == currentPos ) {
|
|
writeLoadStore( true, tempI32 );
|
|
writeConstInt( keys[i] );
|
|
writeNumericOperator( NumericOperator.eq, ValueType.i32 );
|
|
writeBlockCode( WasmBlockOperator.BR_IF, block );
|
|
}
|
|
}
|
|
block++;
|
|
} while( true );
|
|
if( defaultBlock < 0 ) {
|
|
defaultBlock = block;
|
|
}
|
|
writeBlockCode( WasmBlockOperator.BR, defaultBlock );
|
|
} else {
|
|
int low = byteCode.readInt();
|
|
int count = byteCode.readInt() - low + 1;
|
|
for( int i = 0; i < count; i++ ) {
|
|
byteCode.readInt();
|
|
}
|
|
if( low != 0 ) { // the br_table starts ever with the value 0. That we need to subtract the start value if it different
|
|
writeConstInt( low );
|
|
writeNumericOperator( NumericOperator.sub, ValueType.i32 );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find the next higher value.
|
|
*
|
|
* @param current
|
|
* the current value
|
|
* @param values
|
|
* the unordered list of values
|
|
* @return the next value or current value if not found.
|
|
*/
|
|
private static int findNext( int current, int[] values ) {
|
|
boolean find = false;
|
|
int next = Integer.MAX_VALUE;
|
|
for( int val : values ) {
|
|
if( val > current && val <= next ) {
|
|
next = val;
|
|
find = true;
|
|
}
|
|
}
|
|
return find ? next : current;
|
|
}
|
|
|
|
/**
|
|
* Handle the if<condition> of the Java byte code. This Java instruction compare the first stack value with value 0.
|
|
* Important: In Java the condition for the jump to the else block is saved. In WebAssembler we need to use
|
|
* condition for the if block. The caller of the method must already negate this
|
|
*
|
|
* @param numOp
|
|
* The condition for the if block.
|
|
* @param byteCode
|
|
* current byte code stream to read the taget offset.
|
|
* @throws IOException
|
|
* if any I/O errors occur.
|
|
*/
|
|
private void opIfCondition( NumericOperator numOp, CodeInputStream byteCode ) throws IOException {
|
|
byteCode.skip(2);
|
|
writeConstInt( 0 );
|
|
writeNumericOperator( numOp, ValueType.i32 );
|
|
}
|
|
|
|
/**
|
|
* Handle the if<condition> of the Java byte code. This Java instruction compare the first stack value with value 0.
|
|
* Important: In Java the condition for the jump to the else block is saved. In WebAssembler we need to use
|
|
* condition for the if block. The caller of the method must already negate this
|
|
*
|
|
* @param numOp
|
|
* The condition for the if block.
|
|
* @param byteCode
|
|
* current byte code stream to read the target offset.
|
|
* @throws IOException
|
|
* if any I/O errors occur.
|
|
*/
|
|
private void opIfCompareCondition( NumericOperator numOp, CodeInputStream byteCode ) throws IOException {
|
|
byteCode.skip(2);
|
|
writeNumericOperator( numOp, ValueType.i32 );
|
|
}
|
|
|
|
/**
|
|
* Handle the different compare operator. The compare operator returns the integer values -1, 0 or 1. There is no
|
|
* equivalent in WebAssembly. That we need to read the next operation to find an equivalent.
|
|
*
|
|
* @param valueType
|
|
* the value type of the compared
|
|
* @param byteCode
|
|
* current byte code stream to read the next operation.
|
|
* @throws IOException
|
|
* if any I/O errors occur.
|
|
*/
|
|
private void opCompare( ValueType valueType, CodeInputStream byteCode ) throws IOException {
|
|
NumericOperator numOp;
|
|
int nextOp = byteCode.read();
|
|
switch( nextOp ){
|
|
case 153: // ifeq
|
|
numOp = NumericOperator.ne;
|
|
break;
|
|
case 154: // ifne
|
|
numOp = NumericOperator.eq;
|
|
break;
|
|
case 155: // iflt
|
|
numOp = NumericOperator.gt;
|
|
break;
|
|
case 156: // ifge
|
|
numOp = NumericOperator.le_s;
|
|
break;
|
|
case 157: // ifgt
|
|
numOp = NumericOperator.lt_s;
|
|
break;
|
|
case 158: // ifle
|
|
numOp = NumericOperator.ge_s;
|
|
break;
|
|
default:
|
|
throw new WasmException( "Unexpected compare sub operation: " + nextOp, null, -1 );
|
|
}
|
|
byteCode.skip(2);
|
|
writeNumericOperator( numOp, valueType );
|
|
}
|
|
|
|
/**
|
|
* Write a constant value.
|
|
*
|
|
* @param value
|
|
* the value
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
* @throws WasmException
|
|
* if the value type is not supported
|
|
*/
|
|
private void writeConst( Object value ) throws IOException, WasmException {
|
|
Class<?> clazz = value.getClass();
|
|
if( clazz == Integer.class ) {
|
|
writeConstInt( ((Integer)value).intValue() );
|
|
} else if( clazz == Long.class ) {
|
|
writeConstLong( ((Long)value).longValue() );
|
|
} else if( clazz == Float.class ) {
|
|
writeConstFloat( ((Float)value).floatValue() );
|
|
} else if( clazz == Double.class ) {
|
|
writeConstDouble( ((Double)value).doubleValue() );
|
|
} else {
|
|
throw new WasmException( "Not supported constant type: " + clazz, sourceFile, -1 );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write a constant integer value
|
|
*
|
|
* @param value
|
|
* the value
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeConstInt( int value ) throws IOException;
|
|
|
|
/**
|
|
* Write a constant long value
|
|
*
|
|
* @param value
|
|
* the value
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeConstLong( long value ) throws IOException;
|
|
|
|
/**
|
|
* Write a constant float value
|
|
*
|
|
* @param value
|
|
* the value
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeConstFloat( float value ) throws IOException;
|
|
|
|
/**
|
|
* Write a constant double value
|
|
*
|
|
* @param value
|
|
* the value
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeConstDouble( double value ) throws IOException;
|
|
|
|
/**
|
|
* Write or Load a local variable.
|
|
*
|
|
* @param load
|
|
* true: if load
|
|
* @param idx
|
|
* the memory/slot idx of the variable
|
|
* @throws WasmException
|
|
* occur a if a variable was used for a different type
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
private void writeLoadStore( boolean load, @Nonnegative int idx ) throws WasmException, IOException {
|
|
idx = localVariables.get( idx ); // translate slot index to position index
|
|
if( load ) {
|
|
writeLoad( idx );
|
|
} else {
|
|
writeStore( idx );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write a variable load.
|
|
*
|
|
* @param idx
|
|
* the index of the parameter variable
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeLoad( int idx ) throws IOException;
|
|
|
|
/**
|
|
* Write a variable store.
|
|
*
|
|
* @param idx
|
|
* the index of the parameter variable
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeStore( int idx ) throws IOException;
|
|
|
|
/**
|
|
* Write a add operator
|
|
*
|
|
* @param numOp
|
|
* the numeric operation
|
|
* @param valueType
|
|
* the type of the parameters
|
|
*
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeNumericOperator( NumericOperator numOp, @Nullable ValueType valueType ) throws IOException;
|
|
|
|
/**
|
|
* Cast a value from one type to another
|
|
*
|
|
* @param cast
|
|
* the operator
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeCast( ValueTypeConvertion cast ) throws IOException;
|
|
|
|
/**
|
|
* Write a call to a function.
|
|
*
|
|
* @param name
|
|
* the full qualified method name
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeFunctionCall( String name ) throws IOException;
|
|
|
|
/**
|
|
* Write a block/branch code
|
|
*
|
|
* @param op
|
|
* the operation
|
|
* @param data
|
|
* extra data depending of the operator
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
*/
|
|
protected abstract void writeBlockCode( @Nonnull WasmBlockOperator op, @Nullable Object data ) throws IOException;
|
|
}
|