mirror of
https://github.com/i-net-software/JWebAssembly.git
synced 2025-03-25 15:37:52 +01:00
629 lines
26 KiB
Java
629 lines
26 KiB
Java
/*
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* Copyright 2017 - 2020 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.BufferedInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Files;
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import java.nio.file.Path;
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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 java.util.function.Function;
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import java.util.logging.Level;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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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.ConstantClass;
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import de.inetsoftware.classparser.MethodInfo;
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import de.inetsoftware.jwebassembly.JWebAssembly;
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import de.inetsoftware.jwebassembly.WasmException;
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import de.inetsoftware.jwebassembly.javascript.JavaScriptWriter;
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import de.inetsoftware.jwebassembly.module.TypeManager.StructType;
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import de.inetsoftware.jwebassembly.wasm.AnyType;
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import de.inetsoftware.jwebassembly.wasm.NamedStorageType;
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import de.inetsoftware.jwebassembly.wasm.StructOperator;
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import de.inetsoftware.jwebassembly.wasm.ValueType;
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import de.inetsoftware.jwebassembly.wasm.WasmOptions;
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import de.inetsoftware.jwebassembly.watparser.WatParser;
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/**
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* Generate the WebAssembly output.
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*
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* @author Volker Berlin
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*/
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public class ModuleGenerator {
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private final ModuleWriter writer;
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private final JavaScriptWriter javaScript;
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private final ClassFileLoader classFileLoader;
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private final JavaMethodWasmCodeBuilder javaCodeBuilder;
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private final WatParser watParser;
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private String sourceFile;
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private String className;
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private FunctionManager functions = new FunctionManager();
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private TypeManager types = new TypeManager();
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private StringManager strings = new StringManager();
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private CodeOptimizer optimizer = new CodeOptimizer();
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/**
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* Create a new generator.
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*
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* @param writer
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* the target writer
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* @param target
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* the target for the module data
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* @param libraries
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* libraries
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*/
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public ModuleGenerator( @Nonnull ModuleWriter writer, WasmTarget target, @Nonnull List<URL> libraries ) {
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this.javaCodeBuilder = new JavaMethodWasmCodeBuilder();
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this.watParser = new WatParser();
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this.writer = writer;
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this.javaScript = new JavaScriptWriter( target );
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this.classFileLoader = new ClassFileLoader( new URLClassLoader( libraries.toArray( new URL[libraries.size()] ) ) );
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WasmOptions options = writer.options;
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types.init( options );
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strings.init( functions );
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javaCodeBuilder.init( types, functions, strings, options, classFileLoader );
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((WasmCodeBuilder)watParser).init( types, functions, strings, options, classFileLoader );
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scanLibraries( libraries );
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}
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/**
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* Scan the libraries for annotated methods
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*
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* @param libraries
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* libraries
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*/
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private void scanLibraries( @Nonnull List<URL> libraries ) {
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// search for replacement methods in the libraries
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for( URL url : libraries ) {
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try {
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File file = new File(url.toURI());
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if( file.isDirectory() ) {
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for( Iterator<Path> iterator = Files.walk( file.toPath() ).iterator(); iterator.hasNext(); ) {
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Path path = iterator.next();
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if( path.toString().endsWith( ".class" ) ) {
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ClassFile classFile = new ClassFile( new BufferedInputStream( Files.newInputStream( path ) ) );
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prepare( classFile );
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}
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}
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}
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} catch( Exception e ) {
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e.printStackTrace();
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}
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try (ZipInputStream input = new ZipInputStream( url.openStream() )) {
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do {
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ZipEntry entry = input.getNextEntry();
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if( entry == null ) {
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break;
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}
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if( entry.getName().endsWith( ".class" ) ) {
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try {
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ClassFile classFile = new ClassFile( new BufferedInputStream( input ) {
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@Override
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public void close() {
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} // does not close the zip stream
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} );
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prepare( classFile );
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} catch( Throwable th ) {
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JWebAssembly.LOGGER.log( Level.SEVERE, "Parsing error with " + entry.getName() + " in " + url, th );
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}
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}
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} while( true );
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} catch( IOException e ) {
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e.printStackTrace();
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}
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}
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}
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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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* @throws IOException
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* if any I/O error occur
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*/
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public void prepare( ClassFile classFile ) throws IOException {
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// check if this class replace another class
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Map<String,Object> annotationValues;
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if( (annotationValues = classFile.getAnnotation( JWebAssembly.REPLACE_ANNOTATION )) != null ) {
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String signatureName = (String)annotationValues.get( "value" );
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if( signatureName != null ) {
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classFileLoader.replace( signatureName, classFile );
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}
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}
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iterateMethods( classFile, m -> prepareMethod( m ) );
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}
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/**
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* Prepare all needed methods/functions and scan the content for more needed stuff.
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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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private void prepareFunctions() throws IOException {
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FunctionName next;
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NEXT:
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while( (next = functions.nextScannLater()) != null ) {
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ClassFile classFile = classFileLoader.get( next.className );
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if( classFile == null ) {
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if( next instanceof SyntheticFunctionName ) {
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JWebAssembly.LOGGER.fine( '\t' + next.methodName + next.signature );
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SyntheticFunctionName synth = (SyntheticFunctionName)next;
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if( synth.hasWasmCode() ) {
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scanMethod( synth.getCodeBuilder( watParser ) );
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} else {
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functions.markAsImport( synth, synth.getAnnotation() );
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}
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functions.markAsScanned( next );
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}
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} else {
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JWebAssembly.LOGGER.fine( "scan class: " + next.className );
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iterateMethods( classFile, method -> {
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try {
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FunctionName name = new FunctionName( method );
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if( functions.needToScan( name ) ) {
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JWebAssembly.LOGGER.fine( '\t' + name.methodName + name.signature );
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scanMethod( createInstructions( functions.replace( name, method ) ) );
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functions.markAsScanned( name );
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}
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} catch (IOException ioex){
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throw WasmException.create( ioex, sourceFile, className, -1 );
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}
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} );
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}
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if( functions.needToScan( next ) ) { // function was not found
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// search if there is a super class with the same signature
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ClassFile superClassFile = classFile;
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while( superClassFile != null ) {
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MethodInfo method = superClassFile.getMethod( next.methodName, next.signature );
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if( method != null ) {
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FunctionName name = new FunctionName( method );
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functions.markAsNeeded( name, method.isStatic() );
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functions.setAlias( next, name );
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continue NEXT; // we have found a super method
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}
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ConstantClass superClass = superClassFile.getSuperClass();
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superClassFile = superClass == null ? null : classFileLoader.get( superClass.getName() );
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}
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throw new WasmException( "Missing function: " + next.signatureName, -1 );
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}
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}
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}
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/**
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* Finish the prepare after all classes/methods are prepare. This must be call before we can start with write the
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* first method.
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* @throws IOException
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* if any I/O error occur
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*/
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public void prepareFinish() throws IOException {
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prepareFunctions();
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// write only the needed imports to the output
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for( Iterator<FunctionName> iterator = functions.getNeededImports(); iterator.hasNext(); ) {
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FunctionName name = iterator.next();
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functions.markAsWritten( name );
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Function<String, Object> importAnannotation = functions.getImportAnannotation( name );
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String importModule = (String)importAnannotation.apply( "module" );
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if( importModule == null || importModule.isEmpty() ) {
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// use className if module is not set
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importModule = name.className.substring( name.className.lastIndexOf( '/' ) + 1 );
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}
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String importName = (String)importAnannotation.apply( "name" );
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if( importName == null || importName.isEmpty() ) {
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// use method name as function if not set
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importName = name.methodName;
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}
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writer.prepareImport( name, importModule, importName );
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writeMethodSignature( name, true, null );
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javaScript.addImport( importModule, importName, importAnannotation );
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}
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// init/write the function types
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for( Iterator<FunctionName> iterator = functions.getNeededFunctions(); iterator.hasNext(); ) {
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FunctionName name = iterator.next();
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writeMethodSignature( name, functions.isStatic( name ), null );
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}
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JWebAssembly.LOGGER.fine( "scan finsih" );
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types.prepareFinish( writer, functions, classFileLoader );
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prepareFunctions(); // prepare of types can add some override methods as needed
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functions.prepareFinish();
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strings.prepareFinish( writer );
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writer.prepareFinish();
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}
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/**
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* Scan the method and list all needed methods.
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*
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* @param codeBuilder
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* the codeBuilder with instructions of the method
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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 scanMethod( WasmCodeBuilder codeBuilder ) throws IOException {
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if( codeBuilder == null ) {
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return;
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}
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List<WasmInstruction> instructions = codeBuilder.getInstructions();
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for( WasmInstruction instruction : instructions ) {
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switch( instruction.getType() ) {
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case Call:
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((WasmCallInstruction)instruction).markAsNeeded( functions, true );
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break;
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case CallIndirect:
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((WasmCallInstruction)instruction).markAsNeeded( functions, false );
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break;
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default:
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}
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}
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}
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/**
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* Finish the code generation.
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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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public void finish() throws IOException {
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for( Iterator<FunctionName> it = functions.getWriteLater(); it.hasNext(); ) {
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sourceFile = null; // clear previous value for the case an IO exception occur
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className = null;
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FunctionName next = it.next();
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if( next instanceof SyntheticFunctionName ) {
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writeMethodImpl( next, true, ((SyntheticFunctionName)next).getCodeBuilder( watParser ) );
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} else {
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ClassFile classFile = classFileLoader.get( next.className );
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if( classFile == null ) {
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throw new WasmException( "Missing function: " + next.signatureName, -1 );
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} else {
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sourceFile = classFile.getSourceFile();
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className = classFile.getThisClass().getName();
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MethodInfo method = classFile.getMethod( next.methodName, next.signature );
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if( method != null ) {
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try {
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Map<String, Object> wat = method.getAnnotation( JWebAssembly.TEXTCODE_ANNOTATION );
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if( wat != null ) {
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String signature = (String)wat.get( "signature" );
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if( signature == null ) {
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signature = method.getType();
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}
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next = new FunctionName( method, signature );
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} else {
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method = functions.replace( next, method );
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}
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if( functions.needToWrite( next ) ) {
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writeMethod( next, method );
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}
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} catch (IOException ioex){
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throw WasmException.create( ioex, sourceFile, className, -1 );
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}
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} else {
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if( functions.needToWrite( next ) ) {
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throw new WasmException( "Missing function: " + next.signatureName, -1 );
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}
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}
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}
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}
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}
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javaScript.finish();
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}
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/**
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* Iterate over all methods of the classFile and run the handler.
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*
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* @param classFile
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* the classFile
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* @param handler
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* the handler
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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 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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className = null;
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try {
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sourceFile = classFile.getSourceFile();
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className = classFile.getThisClass().getName();
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MethodInfo[] methods = classFile.getMethods();
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for( MethodInfo method : methods ) {
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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, className, -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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private void prepareMethod( MethodInfo method ) throws WasmException {
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try {
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FunctionName name = new FunctionName( method );
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if( functions.isKnown( name ) ) {
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return;
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}
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Map<String,Object> annotationValues;
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if( (annotationValues = method.getAnnotation( JWebAssembly.REPLACE_ANNOTATION )) != null ) {
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functions.isStatic( name ); // register this class that process the annotation of this replacement function not a second time. iSKnown() returns true now.
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String signatureName = (String)annotationValues.get( "value" );
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name = new FunctionName( signatureName );
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functions.addReplacement( name, method );
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}
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if( (annotationValues = method.getAnnotation( JWebAssembly.IMPORT_ANNOTATION )) != null ) {
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if( !method.isStatic() ) {
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throw new WasmException( "Import method must be static: " + name.fullName, -1 );
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}
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functions.markAsImport( name, annotationValues );
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return;
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}
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if( (annotationValues = method.getAnnotation( JWebAssembly.EXPORT_ANNOTATION )) != null ) {
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if( !method.isStatic() ) {
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throw new WasmException( "Export method must be static: " + name.fullName, -1 );
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}
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functions.markAsNeeded( name, true );
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return;
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}
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} catch( Exception ioex ) {
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throw WasmException.create( ioex, sourceFile, className, -1 );
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}
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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 name
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* the function name that should be written. This can be differ from the value in the MethodInfo
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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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* @throws IOException
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* if any I/O error occur
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*/
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private void writeMethod( FunctionName name, MethodInfo method ) throws WasmException, IOException {
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WasmCodeBuilder codeBuilder = createInstructions( method );
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if( codeBuilder == null ) {
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return;
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}
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writeExport( name, method );
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writeMethodImpl( name, method.isStatic(), codeBuilder );
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}
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/**
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* Create the instructions in a code builder
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*
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* @param method
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* the method to parse
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* @return the CodeBuilder or null if it is an import function
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* @throws IOException
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* if any I/O error occur
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*/
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@Nullable
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private WasmCodeBuilder createInstructions( MethodInfo method ) throws IOException {
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Code code = null;
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try {
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Map<String,Object> annotationValues;
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if( (annotationValues = method.getAnnotation( JWebAssembly.IMPORT_ANNOTATION )) != null ) {
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functions.markAsImport( new FunctionName( method ), annotationValues );
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return null;
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}
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code = method.getCode();
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if( method.getAnnotation( JWebAssembly.TEXTCODE_ANNOTATION ) != null ) {
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Map<String, Object> wat = method.getAnnotation( JWebAssembly.TEXTCODE_ANNOTATION );
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String watCode = (String)wat.get( "value" );
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String signature = (String)wat.get( "signature" );
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if( signature == null ) {
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signature = method.getType();
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}
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watParser.parse( watCode, method, code == null ? -1 : code.getFirstLineNr() );
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return watParser;
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} else if( code != null ) { // abstract methods and interface methods does not have code
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javaCodeBuilder.buildCode( code, method );
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return javaCodeBuilder;
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} else {
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throw new WasmException( "Abstract or native method can not be used: " + new FunctionName( method ).signatureName, -1 );
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}
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} catch( Exception ioex ) {
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int lineNumber = code == null ? -1 : code.getFirstLineNr();
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throw WasmException.create( ioex, sourceFile, className, lineNumber );
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}
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}
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/**
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* Write the method instruction to the Wasm writer.
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*
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* @param name
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* the name of the function
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* @param isStatic
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* if it is static
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* @param codeBuilder
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* the code builder with instructions
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* @throws WasmException
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* if some Java code can't converted
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* @throws IOException
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* if an i/O error occur
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*/
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private void writeMethodImpl( FunctionName name, boolean isStatic, WasmCodeBuilder codeBuilder ) throws WasmException, IOException {
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writer.writeMethodStart( name, sourceFile );
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functions.markAsWritten( name );
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writeMethodSignature( name, isStatic, codeBuilder );
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List<WasmInstruction> instructions = codeBuilder.getInstructions();
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optimizer.optimze( instructions );
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|
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int lastJavaSourceLine = -1;
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|
for( WasmInstruction instruction : instructions ) {
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|
try {
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// add source-map information
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int javaSourceLine = instruction.getLineNumber();
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if( javaSourceLine >= 0 && javaSourceLine != lastJavaSourceLine ) {
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writer.markSourceLine( javaSourceLine );
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lastJavaSourceLine = javaSourceLine;
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}
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|
|
|
switch( instruction.getType() ) {
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case Block:
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|
switch( ((WasmBlockInstruction)instruction).getOperation() ) {
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|
case TRY:
|
|
case CATCH:
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writer.writeException();
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break;
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default:
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}
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break;
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case Call:
|
|
((WasmCallInstruction)instruction).markAsNeeded( functions, true );
|
|
break;
|
|
case CallIndirect:
|
|
((WasmCallInstruction)instruction).markAsNeeded( functions, false );
|
|
break;
|
|
case Struct:
|
|
if( !writer.options.useGC() ) {
|
|
break;
|
|
}
|
|
WasmStructInstruction instr = (WasmStructInstruction)instruction;
|
|
if( instr.getOperator() == StructOperator.NEW_DEFAULT ) {
|
|
StructType structType = instr.getStructType();
|
|
List<NamedStorageType> list = structType.getFields();
|
|
for( NamedStorageType storageType : list ) {
|
|
if( TypeManager.VTABLE == storageType.getName() ) {
|
|
writer.writeConst( structType.getVTable(), ValueType.i32 );
|
|
} else {
|
|
writer.writeDefaultValue( storageType.getType() );
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
}
|
|
|
|
instruction.writeTo( writer );
|
|
} catch( Throwable th ) {
|
|
throw WasmException.create( th, instruction.getLineNumber() );
|
|
}
|
|
}
|
|
writer.writeMethodFinish();
|
|
}
|
|
|
|
/**
|
|
* Look for a Export annotation and if there write an export directive.
|
|
*
|
|
* @param name
|
|
* the function name
|
|
* @param method
|
|
* the method
|
|
*
|
|
* @throws IOException
|
|
* if any IOException occur
|
|
*/
|
|
private void writeExport( FunctionName name, MethodInfo method ) throws IOException {
|
|
Map<String,Object> export = method.getAnnotation( JWebAssembly.EXPORT_ANNOTATION );
|
|
if( export != null ) {
|
|
String exportName = (String)export.get( "name" );
|
|
if( exportName == null ) {
|
|
exportName = method.getName(); // TODO naming conversion rule if no name was set
|
|
}
|
|
writer.writeExport( name, exportName );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write the parameter and return signatures
|
|
*
|
|
* @param name
|
|
* the Java signature, typical method.getType();
|
|
* @param isStatic
|
|
* if method is static
|
|
* @param codeBuilder
|
|
* the calculated variables
|
|
* @throws IOException
|
|
* if any I/O error occur
|
|
* @throws WasmException
|
|
* if some Java code can't converted
|
|
*/
|
|
private void writeMethodSignature( FunctionName name, boolean isStatic, WasmCodeBuilder codeBuilder ) throws IOException, WasmException {
|
|
writer.writeMethodParamStart( name );
|
|
int paramCount = 0;
|
|
if( !isStatic ) {
|
|
StructType instanceType = types.valueOf( name.className );
|
|
writer.writeMethodParam( "param", instanceType, "this" );
|
|
paramCount++;
|
|
}
|
|
Iterator<AnyType> parser = name.getSignature( types );
|
|
AnyType type;
|
|
for( String kind : new String[] {"param","result"}) {
|
|
while( parser.hasNext() && (type = parser.next()) != null ) {
|
|
String paramName = null;
|
|
if( kind == "param" ) {
|
|
if( codeBuilder != null ) {
|
|
paramName = codeBuilder.getLocalName( paramCount );
|
|
}
|
|
paramCount++;
|
|
}
|
|
if( type != ValueType.empty ) {
|
|
writer.writeMethodParam( kind, type, paramName );
|
|
}
|
|
}
|
|
}
|
|
if( codeBuilder != null ) {
|
|
List<AnyType> localTypes = codeBuilder.getLocalTypes( paramCount );
|
|
for( int i = 0; i < localTypes.size(); i++ ) {
|
|
type = localTypes.get( i );
|
|
int idx = paramCount + i;
|
|
String paramName = codeBuilder.getLocalName( idx );
|
|
writer.writeMethodParam( "local", type, paramName );
|
|
}
|
|
}
|
|
writer.writeMethodParamFinish( name );
|
|
}
|
|
|
|
}
|