--- old/make/nashorn/buildtools/nasgen/src/jdk/nashorn/internal/tools/nasgen/ClassGenerator.java 2020-04-15 18:44:58.000000000 +0530 +++ /dev/null 2020-04-15 18:44:58.000000000 +0530 @@ -1,397 +0,0 @@ -/* - * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package jdk.nashorn.internal.tools.nasgen; - -import static jdk.internal.org.objectweb.asm.Opcodes.ACC_FINAL; -import static jdk.internal.org.objectweb.asm.Opcodes.ACC_PRIVATE; -import static jdk.internal.org.objectweb.asm.Opcodes.ACC_PUBLIC; -import static jdk.internal.org.objectweb.asm.Opcodes.ACC_STATIC; -import static jdk.internal.org.objectweb.asm.Opcodes.H_INVOKESTATIC; -import static jdk.internal.org.objectweb.asm.Opcodes.H_INVOKEVIRTUAL; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.ACCESSORPROPERTY_CREATE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.ACCESSORPROPERTY_CREATE_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.ACCESSORPROPERTY_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.ARRAYLIST_INIT_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.ARRAYLIST_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.CLINIT; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.COLLECTIONS_EMPTY_LIST; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.COLLECTIONS_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.COLLECTION_ADD; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.COLLECTION_ADD_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.COLLECTION_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.DEFAULT_INIT_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.GETTER_PREFIX; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.GET_CLASS_NAME; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.GET_CLASS_NAME_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.INIT; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.LIST_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.NATIVESYMBOL_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.OBJECT_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_FIELD_NAME; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_NEWMAP; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_NEWMAP_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_CREATEBUILTIN; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_CREATEBUILTIN_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_CREATEBUILTIN_SPECS_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_SETARITY; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_SETARITY_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_SETDOCUMENTATIONKEY; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_SETDOCUMENTATIONKEY_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTFUNCTION_TYPE; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SETTER_PREFIX; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SYMBOL_DESC; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.SYMBOL_PREFIX; -import static jdk.nashorn.internal.tools.nasgen.StringConstants.TYPE_OBJECT; - -import java.io.BufferedInputStream; -import java.io.FileInputStream; -import java.io.IOException; -import java.util.List; -import jdk.internal.org.objectweb.asm.ClassReader; -import jdk.internal.org.objectweb.asm.ClassVisitor; -import jdk.internal.org.objectweb.asm.ClassWriter; -import jdk.internal.org.objectweb.asm.FieldVisitor; -import jdk.internal.org.objectweb.asm.Handle; -import jdk.internal.org.objectweb.asm.MethodVisitor; -import jdk.internal.org.objectweb.asm.Type; -import jdk.nashorn.internal.tools.nasgen.MemberInfo.Kind; - -/** - * Base class for class generator classes. - * - */ -public class ClassGenerator { - /** ASM class writer used to output bytecode for this class */ - protected final ClassWriter cw; - - /** - * Constructor - */ - protected ClassGenerator() { - this.cw = makeClassWriter(); - } - - MethodGenerator makeStaticInitializer() { - return makeStaticInitializer(cw); - } - - MethodGenerator makeConstructor() { - return makeConstructor(cw); - } - - MethodGenerator makeMethod(final int access, final String name, final String desc) { - return makeMethod(cw, access, name, desc); - } - - void addMapField() { - addMapField(cw); - } - - void addField(final String name, final String desc) { - addField(cw, name, desc); - } - - void addFunctionField(final String name) { - addFunctionField(cw, name); - } - - void addGetter(final String owner, final MemberInfo memInfo) { - addGetter(cw, owner, memInfo); - } - - void addSetter(final String owner, final MemberInfo memInfo) { - addSetter(cw, owner, memInfo); - } - - void emitGetClassName(final String name) { - final MethodGenerator mi = makeMethod(ACC_PUBLIC, GET_CLASS_NAME, GET_CLASS_NAME_DESC); - mi.loadLiteral(name); - mi.returnValue(); - mi.computeMaxs(); - mi.visitEnd(); - } - - static ClassWriter makeClassWriter() { - return new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS) { - @Override - protected String getCommonSuperClass(final String type1, final String type2) { - try { - return super.getCommonSuperClass(type1, type2); - } catch (final RuntimeException | LinkageError e) { - if (MemberInfo.isScriptObject(type1) && MemberInfo.isScriptObject(type2)) { - return StringConstants.SCRIPTOBJECT_TYPE; - } - return StringConstants.OBJECT_TYPE; - } - } - }; - } - - static MethodGenerator makeStaticInitializer(final ClassVisitor cv) { - return makeStaticInitializer(cv, CLINIT); - } - - static MethodGenerator makeStaticInitializer(final ClassVisitor cv, final String name) { - final int access = ACC_PUBLIC | ACC_STATIC; - final String desc = DEFAULT_INIT_DESC; - final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null); - return new MethodGenerator(mv, access, name, desc); - } - - static MethodGenerator makeConstructor(final ClassVisitor cv) { - final int access = 0; - final String name = INIT; - final String desc = DEFAULT_INIT_DESC; - final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null); - return new MethodGenerator(mv, access, name, desc); - } - - static MethodGenerator makeMethod(final ClassVisitor cv, final int access, final String name, final String desc) { - final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null); - return new MethodGenerator(mv, access, name, desc); - } - - static void emitStaticInitPrefix(final MethodGenerator mi, final String className, final int memberCount) { - mi.visitCode(); - if (memberCount > 0) { - // new ArrayList(int) - mi.newObject(ARRAYLIST_TYPE); - mi.dup(); - mi.push(memberCount); - mi.invokeSpecial(ARRAYLIST_TYPE, INIT, ARRAYLIST_INIT_DESC); - // stack: ArrayList - } else { - // java.util.Collections.EMPTY_LIST - mi.getStatic(COLLECTIONS_TYPE, COLLECTIONS_EMPTY_LIST, LIST_DESC); - // stack List - } - } - - static void emitStaticInitSuffix(final MethodGenerator mi, final String className) { - // stack: Collection - // pmap = PropertyMap.newMap(Collection); - mi.invokeStatic(PROPERTYMAP_TYPE, PROPERTYMAP_NEWMAP, PROPERTYMAP_NEWMAP_DESC); - // $nasgenmap$ = pmap; - mi.putStatic(className, PROPERTYMAP_FIELD_NAME, PROPERTYMAP_DESC); - mi.returnVoid(); - mi.computeMaxs(); - mi.visitEnd(); - } - - @SuppressWarnings("fallthrough") - private static Type memInfoType(final MemberInfo memInfo) { - switch (memInfo.getJavaDesc().charAt(0)) { - case 'I': return Type.INT_TYPE; - case 'J': return Type.LONG_TYPE; - case 'D': return Type.DOUBLE_TYPE; - default: assert false : memInfo.getJavaDesc(); - case 'L': return TYPE_OBJECT; - } - } - - private static String getterDesc(final MemberInfo memInfo) { - return Type.getMethodDescriptor(memInfoType(memInfo)); - } - - private static String setterDesc(final MemberInfo memInfo) { - return Type.getMethodDescriptor(Type.VOID_TYPE, memInfoType(memInfo)); - } - - static void addGetter(final ClassVisitor cv, final String owner, final MemberInfo memInfo) { - final int access = ACC_PUBLIC; - final String name = GETTER_PREFIX + memInfo.getJavaName(); - final String desc = getterDesc(memInfo); - final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null); - final MethodGenerator mi = new MethodGenerator(mv, access, name, desc); - mi.visitCode(); - if (memInfo.isStatic() && memInfo.getKind() == Kind.PROPERTY) { - mi.getStatic(owner, memInfo.getJavaName(), memInfo.getJavaDesc()); - } else { - mi.loadLocal(0); - mi.getField(owner, memInfo.getJavaName(), memInfo.getJavaDesc()); - } - mi.returnValue(); - mi.computeMaxs(); - mi.visitEnd(); - } - - static void addSetter(final ClassVisitor cv, final String owner, final MemberInfo memInfo) { - final int access = ACC_PUBLIC; - final String name = SETTER_PREFIX + memInfo.getJavaName(); - final String desc = setterDesc(memInfo); - final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null); - final MethodGenerator mi = new MethodGenerator(mv, access, name, desc); - mi.visitCode(); - if (memInfo.isStatic() && memInfo.getKind() == Kind.PROPERTY) { - mi.loadLocal(1); - mi.putStatic(owner, memInfo.getJavaName(), memInfo.getJavaDesc()); - } else { - mi.loadLocal(0); - mi.loadLocal(1); - mi.putField(owner, memInfo.getJavaName(), memInfo.getJavaDesc()); - } - mi.returnVoid(); - mi.computeMaxs(); - mi.visitEnd(); - } - - static void addMapField(final ClassVisitor cv) { - // add a PropertyMap static field - final FieldVisitor fv = cv.visitField(ACC_PRIVATE | ACC_STATIC | ACC_FINAL, - PROPERTYMAP_FIELD_NAME, PROPERTYMAP_DESC, null, null); - if (fv != null) { - fv.visitEnd(); - } - } - - static void addField(final ClassVisitor cv, final String name, final String desc) { - final FieldVisitor fv = cv.visitField(ACC_PRIVATE, name, desc, null, null); - if (fv != null) { - fv.visitEnd(); - } - } - - static void addFunctionField(final ClassVisitor cv, final String name) { - addField(cv, name, OBJECT_DESC); - } - - static void newFunction(final MethodGenerator mi, final String objName, final String className, final MemberInfo memInfo, final List specs) { - final boolean arityFound = (memInfo.getArity() != MemberInfo.DEFAULT_ARITY); - - loadFunctionName(mi, memInfo.getName()); - mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, memInfo.getJavaName(), memInfo.getJavaDesc(), false)); - - assert specs != null; - if (!specs.isEmpty()) { - mi.memberInfoArray(className, specs); - mi.invokeStatic(SCRIPTFUNCTION_TYPE, SCRIPTFUNCTION_CREATEBUILTIN, SCRIPTFUNCTION_CREATEBUILTIN_SPECS_DESC); - } else { - mi.invokeStatic(SCRIPTFUNCTION_TYPE, SCRIPTFUNCTION_CREATEBUILTIN, SCRIPTFUNCTION_CREATEBUILTIN_DESC); - } - - if (arityFound) { - mi.dup(); - mi.push(memInfo.getArity()); - mi.invokeVirtual(SCRIPTFUNCTION_TYPE, SCRIPTFUNCTION_SETARITY, SCRIPTFUNCTION_SETARITY_DESC); - } - - mi.dup(); - mi.loadLiteral(memInfo.getDocumentationKey(objName)); - mi.invokeVirtual(SCRIPTFUNCTION_TYPE, SCRIPTFUNCTION_SETDOCUMENTATIONKEY, SCRIPTFUNCTION_SETDOCUMENTATIONKEY_DESC); - } - - static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo memInfo) { - final String propertyName = memInfo.getName(); - // stack: Collection - // dup of Collection instance - mi.dup(); - - // Load property name, converting to Symbol if it begins with "@@" - loadPropertyKey(mi, propertyName); - // setup flags - mi.push(memInfo.getAttributes()); - // setup getter method handle - String javaName = GETTER_PREFIX + memInfo.getJavaName(); - mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, getterDesc(memInfo), false)); - // setup setter method handle - if (memInfo.isFinal()) { - mi.pushNull(); - } else { - javaName = SETTER_PREFIX + memInfo.getJavaName(); - mi.visitLdcInsn(new Handle(H_INVOKEVIRTUAL, className, javaName, setterDesc(memInfo), false)); - } - // property = AccessorProperty.create(key, flags, getter, setter); - mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC); - // boolean Collection.add(property) - mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC); - // pop return value of Collection.add - mi.pop(); - // stack: Collection - } - - static void linkerAddGetterSetter(final MethodGenerator mi, final String className, final MemberInfo getter, final MemberInfo setter) { - final String propertyName = getter.getName(); - // stack: Collection - // dup of Collection instance - mi.dup(); - - // Load property name, converting to Symbol if it begins with "@@" - loadPropertyKey(mi, propertyName); - // setup flags - mi.push(getter.getAttributes()); - // setup getter method handle - mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, - getter.getJavaName(), getter.getJavaDesc(), false)); - // setup setter method handle - if (setter == null) { - mi.pushNull(); - } else { - mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, - setter.getJavaName(), setter.getJavaDesc(), false)); - } - // property = AccessorProperty.create(key, flags, getter, setter); - mi.invokeStatic(ACCESSORPROPERTY_TYPE, ACCESSORPROPERTY_CREATE, ACCESSORPROPERTY_CREATE_DESC); - // boolean Collection.add(property) - mi.invokeInterface(COLLECTION_TYPE, COLLECTION_ADD, COLLECTION_ADD_DESC); - // pop return value of Collection.add - mi.pop(); - // stack: Collection - } - - static ScriptClassInfo getScriptClassInfo(final String fileName) throws IOException { - try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName))) { - return getScriptClassInfo(new ClassReader(bis)); - } - } - - static ScriptClassInfo getScriptClassInfo(final byte[] classBuf) { - return getScriptClassInfo(new ClassReader(classBuf)); - } - - private static void loadFunctionName(final MethodGenerator mi, final String propertyName) { - if (propertyName.startsWith(SYMBOL_PREFIX)) { - mi.loadLiteral("Symbol[" + propertyName.substring(2) + "]"); - } else { - mi.loadLiteral(propertyName); - } - } - - private static void loadPropertyKey(final MethodGenerator mi, final String propertyName) { - if (propertyName.startsWith(SYMBOL_PREFIX)) { - mi.getStatic(NATIVESYMBOL_TYPE, propertyName.substring(2), SYMBOL_DESC); - } else { - mi.loadLiteral(propertyName); - } - } - - private static ScriptClassInfo getScriptClassInfo(final ClassReader reader) { - final ScriptClassInfoCollector scic = new ScriptClassInfoCollector(); - reader.accept(scic, 0); - return scic.getScriptClassInfo(); - } -}