| /* |
| * 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.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_TYPE; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.SETTER_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) { |
| 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<Property>); |
| 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 className, final MemberInfo memInfo, final List<MemberInfo> specs) { |
| final boolean arityFound = (memInfo.getArity() != MemberInfo.DEFAULT_ARITY); |
| |
| mi.loadLiteral(memInfo.getName()); |
| mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, memInfo.getJavaName(), memInfo.getJavaDesc())); |
| |
| 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); |
| } |
| } |
| |
| 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(); |
| |
| // property = AccessorProperty.create(key, flags, getter, setter); |
| mi.loadLiteral(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))); |
| // 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))); |
| } |
| 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(); |
| |
| // property = AccessorProperty.create(key, flags, getter, setter); |
| mi.loadLiteral(propertyName); |
| // setup flags |
| mi.push(getter.getAttributes()); |
| // setup getter method handle |
| mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, |
| getter.getJavaName(), getter.getJavaDesc())); |
| // setup setter method handle |
| if (setter == null) { |
| mi.pushNull(); |
| } else { |
| mi.visitLdcInsn(new Handle(H_INVOKESTATIC, className, |
| setter.getJavaName(), setter.getJavaDesc())); |
| } |
| 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 ScriptClassInfo getScriptClassInfo(final ClassReader reader) { |
| final ScriptClassInfoCollector scic = new ScriptClassInfoCollector(); |
| reader.accept(scic, 0); |
| return scic.getScriptClassInfo(); |
| } |
| } |
