1806 lines
67 KiB
Java
1806 lines
67 KiB
Java
/*
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* Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.javac.jvm;
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import java.io.*;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.HashSet;
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import javax.tools.JavaFileManager;
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import javax.tools.FileObject;
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import javax.tools.JavaFileObject;
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import com.sun.tools.javac.code.*;
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import com.sun.tools.javac.code.Attribute.RetentionPolicy;
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import com.sun.tools.javac.code.Symbol.*;
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import com.sun.tools.javac.code.Type.*;
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import com.sun.tools.javac.code.Types.UniqueType;
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import com.sun.tools.javac.file.BaseFileObject;
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import com.sun.tools.javac.jvm.Pool.DynamicMethod;
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import com.sun.tools.javac.jvm.Pool.Method;
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import com.sun.tools.javac.jvm.Pool.MethodHandle;
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import com.sun.tools.javac.jvm.Pool.Variable;
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import com.sun.tools.javac.util.*;
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import static com.sun.tools.javac.code.Flags.*;
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import static com.sun.tools.javac.code.Kinds.*;
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import static com.sun.tools.javac.code.TypeTag.*;
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import static com.sun.tools.javac.jvm.UninitializedType.*;
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import static com.sun.tools.javac.main.Option.*;
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import static javax.tools.StandardLocation.CLASS_OUTPUT;
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/** This class provides operations to map an internal symbol table graph
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* rooted in a ClassSymbol into a classfile.
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*
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* <p><b>This is NOT part of any supported API.
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* If you write code that depends on this, you do so at your own risk.
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* This code and its internal interfaces are subject to change or
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* deletion without notice.</b>
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*/
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public class ClassWriter extends ClassFile {
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protected static final Context.Key<ClassWriter> classWriterKey =
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new Context.Key<ClassWriter>();
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private final Options options;
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/** Switch: verbose output.
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*/
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private boolean verbose;
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/** Switch: scramble private field names.
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*/
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private boolean scramble;
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/** Switch: scramble all field names.
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*/
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private boolean scrambleAll;
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/** Switch: retrofit mode.
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*/
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private boolean retrofit;
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/** Switch: emit source file attribute.
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*/
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private boolean emitSourceFile;
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/** Switch: generate CharacterRangeTable attribute.
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*/
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private boolean genCrt;
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/** Switch: describe the generated stackmap.
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*/
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boolean debugstackmap;
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/**
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* Target class version.
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*/
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private Target target;
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/**
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* Source language version.
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*/
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private Source source;
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/** Type utilities. */
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private Types types;
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/** The initial sizes of the data and constant pool buffers.
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* Sizes are increased when buffers get full.
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*/
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static final int DATA_BUF_SIZE = 0x0fff0;
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static final int POOL_BUF_SIZE = 0x1fff0;
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/** An output buffer for member info.
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*/
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ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
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/** An output buffer for the constant pool.
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*/
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ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
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/** The constant pool.
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*/
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Pool pool;
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/** The inner classes to be written, as a set.
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*/
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Set<ClassSymbol> innerClasses;
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/** The inner classes to be written, as a queue where
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* enclosing classes come first.
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*/
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ListBuffer<ClassSymbol> innerClassesQueue;
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/** The bootstrap methods to be written in the corresponding class attribute
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* (one for each invokedynamic)
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*/
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Map<DynamicMethod, MethodHandle> bootstrapMethods;
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/** The log to use for verbose output.
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*/
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private final Log log;
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/** The name table. */
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private final Names names;
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/** Access to files. */
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private final JavaFileManager fileManager;
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/** Sole signature generator */
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private final CWSignatureGenerator signatureGen;
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/** The tags and constants used in compressed stackmap. */
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static final int SAME_FRAME_SIZE = 64;
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static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
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static final int SAME_FRAME_EXTENDED = 251;
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static final int FULL_FRAME = 255;
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static final int MAX_LOCAL_LENGTH_DIFF = 4;
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/** Get the ClassWriter instance for this context. */
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public static ClassWriter instance(Context context) {
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ClassWriter instance = context.get(classWriterKey);
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if (instance == null)
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instance = new ClassWriter(context);
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return instance;
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}
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/** Construct a class writer, given an options table.
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*/
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protected ClassWriter(Context context) {
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context.put(classWriterKey, this);
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log = Log.instance(context);
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names = Names.instance(context);
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options = Options.instance(context);
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target = Target.instance(context);
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source = Source.instance(context);
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types = Types.instance(context);
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fileManager = context.get(JavaFileManager.class);
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signatureGen = new CWSignatureGenerator(types);
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verbose = options.isSet(VERBOSE);
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scramble = options.isSet("-scramble");
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scrambleAll = options.isSet("-scrambleAll");
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retrofit = options.isSet("-retrofit");
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genCrt = options.isSet(XJCOV);
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debugstackmap = options.isSet("debugstackmap");
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emitSourceFile = options.isUnset(G_CUSTOM) ||
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options.isSet(G_CUSTOM, "source");
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String dumpModFlags = options.get("dumpmodifiers");
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dumpClassModifiers =
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(dumpModFlags != null && dumpModFlags.indexOf('c') != -1);
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dumpFieldModifiers =
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(dumpModFlags != null && dumpModFlags.indexOf('f') != -1);
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dumpInnerClassModifiers =
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(dumpModFlags != null && dumpModFlags.indexOf('i') != -1);
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dumpMethodModifiers =
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(dumpModFlags != null && dumpModFlags.indexOf('m') != -1);
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}
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/******************************************************************
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* Diagnostics: dump generated class names and modifiers
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******************************************************************/
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/** Value of option 'dumpmodifiers' is a string
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* indicating which modifiers should be dumped for debugging:
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* 'c' -- classes
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* 'f' -- fields
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* 'i' -- innerclass attributes
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* 'm' -- methods
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* For example, to dump everything:
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* javac -XDdumpmodifiers=cifm MyProg.java
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*/
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private final boolean dumpClassModifiers; // -XDdumpmodifiers=c
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private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f
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private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
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private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m
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/** Return flags as a string, separated by " ".
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*/
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public static String flagNames(long flags) {
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StringBuilder sbuf = new StringBuilder();
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int i = 0;
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long f = flags & StandardFlags;
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while (f != 0) {
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if ((f & 1) != 0) {
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sbuf.append(" ");
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sbuf.append(flagName[i]);
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}
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f = f >> 1;
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i++;
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}
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return sbuf.toString();
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}
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//where
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private final static String[] flagName = {
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"PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
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"SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
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"ABSTRACT", "STRICTFP"};
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/******************************************************************
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* Output routines
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******************************************************************/
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/** Write a character into given byte buffer;
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* byte buffer will not be grown.
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*/
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void putChar(ByteBuffer buf, int op, int x) {
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buf.elems[op ] = (byte)((x >> 8) & 0xFF);
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buf.elems[op+1] = (byte)((x ) & 0xFF);
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}
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/** Write an integer into given byte buffer;
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* byte buffer will not be grown.
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*/
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void putInt(ByteBuffer buf, int adr, int x) {
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buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
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buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
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buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
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buf.elems[adr+3] = (byte)((x ) & 0xFF);
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}
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/**
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* Signature Generation
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*/
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private class CWSignatureGenerator extends Types.SignatureGenerator {
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/**
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* An output buffer for type signatures.
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*/
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ByteBuffer sigbuf = new ByteBuffer();
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CWSignatureGenerator(Types types) {
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super(types);
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}
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/**
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* Assemble signature of given type in string buffer.
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* Check for uninitialized types before calling the general case.
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*/
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@Override
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public void assembleSig(Type type) {
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type = type.unannotatedType();
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switch (type.getTag()) {
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case UNINITIALIZED_THIS:
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case UNINITIALIZED_OBJECT:
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// we don't yet have a spec for uninitialized types in the
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// local variable table
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assembleSig(types.erasure(((UninitializedType)type).qtype));
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break;
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default:
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super.assembleSig(type);
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}
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}
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@Override
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protected void append(char ch) {
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sigbuf.appendByte(ch);
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}
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@Override
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protected void append(byte[] ba) {
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sigbuf.appendBytes(ba);
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}
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@Override
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protected void append(Name name) {
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sigbuf.appendName(name);
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}
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@Override
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protected void classReference(ClassSymbol c) {
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enterInner(c);
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}
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private void reset() {
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sigbuf.reset();
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}
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private Name toName() {
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return sigbuf.toName(names);
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}
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private boolean isEmpty() {
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return sigbuf.length == 0;
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}
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}
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/**
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* Return signature of given type
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*/
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Name typeSig(Type type) {
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Assert.check(signatureGen.isEmpty());
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//- System.out.println(" ? " + type);
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signatureGen.assembleSig(type);
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Name n = signatureGen.toName();
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signatureGen.reset();
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//- System.out.println(" " + n);
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return n;
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}
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/** Given a type t, return the extended class name of its erasure in
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* external representation.
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*/
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public Name xClassName(Type t) {
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if (t.hasTag(CLASS)) {
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return names.fromUtf(externalize(t.tsym.flatName()));
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} else if (t.hasTag(ARRAY)) {
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return typeSig(types.erasure(t));
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} else {
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throw new AssertionError("xClassName");
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}
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}
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/******************************************************************
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* Writing the Constant Pool
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******************************************************************/
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/** Thrown when the constant pool is over full.
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*/
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public static class PoolOverflow extends Exception {
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private static final long serialVersionUID = 0;
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public PoolOverflow() {}
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}
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public static class StringOverflow extends Exception {
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private static final long serialVersionUID = 0;
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public final String value;
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public StringOverflow(String s) {
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value = s;
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}
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}
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/** Write constant pool to pool buffer.
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* Note: during writing, constant pool
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* might grow since some parts of constants still need to be entered.
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*/
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void writePool(Pool pool) throws PoolOverflow, StringOverflow {
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int poolCountIdx = poolbuf.length;
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poolbuf.appendChar(0);
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int i = 1;
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while (i < pool.pp) {
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Object value = pool.pool[i];
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Assert.checkNonNull(value);
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if (value instanceof Method || value instanceof Variable)
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value = ((DelegatedSymbol)value).getUnderlyingSymbol();
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if (value instanceof MethodSymbol) {
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MethodSymbol m = (MethodSymbol)value;
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if (!m.isDynamic()) {
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poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
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? CONSTANT_InterfaceMethodref
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: CONSTANT_Methodref);
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poolbuf.appendChar(pool.put(m.owner));
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poolbuf.appendChar(pool.put(nameType(m)));
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} else {
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//invokedynamic
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DynamicMethodSymbol dynSym = (DynamicMethodSymbol)m;
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MethodHandle handle = new MethodHandle(dynSym.bsmKind, dynSym.bsm, types);
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DynamicMethod dynMeth = new DynamicMethod(dynSym, types);
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bootstrapMethods.put(dynMeth, handle);
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//init cp entries
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pool.put(names.BootstrapMethods);
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pool.put(handle);
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for (Object staticArg : dynSym.staticArgs) {
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pool.put(staticArg);
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}
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poolbuf.appendByte(CONSTANT_InvokeDynamic);
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poolbuf.appendChar(bootstrapMethods.size() - 1);
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poolbuf.appendChar(pool.put(nameType(dynSym)));
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}
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} else if (value instanceof VarSymbol) {
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VarSymbol v = (VarSymbol)value;
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poolbuf.appendByte(CONSTANT_Fieldref);
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poolbuf.appendChar(pool.put(v.owner));
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poolbuf.appendChar(pool.put(nameType(v)));
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} else if (value instanceof Name) {
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poolbuf.appendByte(CONSTANT_Utf8);
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byte[] bs = ((Name)value).toUtf();
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poolbuf.appendChar(bs.length);
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poolbuf.appendBytes(bs, 0, bs.length);
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if (bs.length > Pool.MAX_STRING_LENGTH)
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throw new StringOverflow(value.toString());
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} else if (value instanceof ClassSymbol) {
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ClassSymbol c = (ClassSymbol)value;
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if (c.owner.kind == TYP) pool.put(c.owner);
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poolbuf.appendByte(CONSTANT_Class);
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if (c.type.hasTag(ARRAY)) {
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poolbuf.appendChar(pool.put(typeSig(c.type)));
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} else {
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poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
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enterInner(c);
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}
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} else if (value instanceof NameAndType) {
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NameAndType nt = (NameAndType)value;
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poolbuf.appendByte(CONSTANT_NameandType);
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poolbuf.appendChar(pool.put(nt.name));
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poolbuf.appendChar(pool.put(typeSig(nt.uniqueType.type)));
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} else if (value instanceof Integer) {
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poolbuf.appendByte(CONSTANT_Integer);
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poolbuf.appendInt(((Integer)value).intValue());
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} else if (value instanceof Long) {
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poolbuf.appendByte(CONSTANT_Long);
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poolbuf.appendLong(((Long)value).longValue());
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i++;
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} else if (value instanceof Float) {
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poolbuf.appendByte(CONSTANT_Float);
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poolbuf.appendFloat(((Float)value).floatValue());
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} else if (value instanceof Double) {
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poolbuf.appendByte(CONSTANT_Double);
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poolbuf.appendDouble(((Double)value).doubleValue());
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i++;
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} else if (value instanceof String) {
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poolbuf.appendByte(CONSTANT_String);
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poolbuf.appendChar(pool.put(names.fromString((String)value)));
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} else if (value instanceof UniqueType) {
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Type type = ((UniqueType)value).type;
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if (type instanceof MethodType) {
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poolbuf.appendByte(CONSTANT_MethodType);
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poolbuf.appendChar(pool.put(typeSig((MethodType)type)));
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} else {
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if (type.hasTag(CLASS)) enterInner((ClassSymbol)type.tsym);
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poolbuf.appendByte(CONSTANT_Class);
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poolbuf.appendChar(pool.put(xClassName(type)));
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}
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} else if (value instanceof MethodHandle) {
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MethodHandle ref = (MethodHandle)value;
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poolbuf.appendByte(CONSTANT_MethodHandle);
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poolbuf.appendByte(ref.refKind);
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poolbuf.appendChar(pool.put(ref.refSym));
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} else {
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Assert.error("writePool " + value);
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}
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i++;
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}
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if (pool.pp > Pool.MAX_ENTRIES)
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throw new PoolOverflow();
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putChar(poolbuf, poolCountIdx, pool.pp);
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}
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/** Given a field, return its name.
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*/
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Name fieldName(Symbol sym) {
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if (scramble && (sym.flags() & PRIVATE) != 0 ||
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scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)
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return names.fromString("_$" + sym.name.getIndex());
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else
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return sym.name;
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}
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|
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/** Given a symbol, return its name-and-type.
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*/
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NameAndType nameType(Symbol sym) {
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return new NameAndType(fieldName(sym),
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retrofit
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? sym.erasure(types)
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: sym.externalType(types), types);
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// if we retrofit, then the NameAndType has been read in as is
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// and no change is necessary. If we compile normally, the
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// NameAndType is generated from a symbol reference, and the
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// adjustment of adding an additional this$n parameter needs to be made.
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}
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|
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/******************************************************************
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* Writing Attributes
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|
******************************************************************/
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|
|
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/** Write header for an attribute to data buffer and return
|
|
* position past attribute length index.
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|
*/
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int writeAttr(Name attrName) {
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databuf.appendChar(pool.put(attrName));
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databuf.appendInt(0);
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return databuf.length;
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}
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|
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/** Fill in attribute length.
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|
*/
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|
void endAttr(int index) {
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putInt(databuf, index - 4, databuf.length - index);
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|
}
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|
|
/** Leave space for attribute count and return index for
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|
* number of attributes field.
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|
*/
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|
int beginAttrs() {
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|
databuf.appendChar(0);
|
|
return databuf.length;
|
|
}
|
|
|
|
/** Fill in number of attributes.
|
|
*/
|
|
void endAttrs(int index, int count) {
|
|
putChar(databuf, index - 2, count);
|
|
}
|
|
|
|
/** Write the EnclosingMethod attribute if needed.
|
|
* Returns the number of attributes written (0 or 1).
|
|
*/
|
|
int writeEnclosingMethodAttribute(ClassSymbol c) {
|
|
if (!target.hasEnclosingMethodAttribute())
|
|
return 0;
|
|
return writeEnclosingMethodAttribute(names.EnclosingMethod, c);
|
|
}
|
|
|
|
/** Write the EnclosingMethod attribute with a specified name.
|
|
* Returns the number of attributes written (0 or 1).
|
|
*/
|
|
protected int writeEnclosingMethodAttribute(Name attributeName, ClassSymbol c) {
|
|
if (c.owner.kind != MTH && // neither a local class
|
|
c.name != names.empty) // nor anonymous
|
|
return 0;
|
|
|
|
int alenIdx = writeAttr(attributeName);
|
|
ClassSymbol enclClass = c.owner.enclClass();
|
|
MethodSymbol enclMethod =
|
|
(c.owner.type == null // local to init block
|
|
|| c.owner.kind != MTH) // or member init
|
|
? null
|
|
: (MethodSymbol)c.owner;
|
|
databuf.appendChar(pool.put(enclClass));
|
|
databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));
|
|
endAttr(alenIdx);
|
|
return 1;
|
|
}
|
|
|
|
/** Write flag attributes; return number of attributes written.
|
|
*/
|
|
int writeFlagAttrs(long flags) {
|
|
int acount = 0;
|
|
if ((flags & DEPRECATED) != 0) {
|
|
int alenIdx = writeAttr(names.Deprecated);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if ((flags & ENUM) != 0 && !target.useEnumFlag()) {
|
|
int alenIdx = writeAttr(names.Enum);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {
|
|
int alenIdx = writeAttr(names.Synthetic);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {
|
|
int alenIdx = writeAttr(names.Bridge);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {
|
|
int alenIdx = writeAttr(names.Varargs);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {
|
|
int alenIdx = writeAttr(names.Annotation);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
return acount;
|
|
}
|
|
|
|
/** Write member (field or method) attributes;
|
|
* return number of attributes written.
|
|
*/
|
|
int writeMemberAttrs(Symbol sym) {
|
|
int acount = writeFlagAttrs(sym.flags());
|
|
long flags = sym.flags();
|
|
if (source.allowGenerics() &&
|
|
(flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&
|
|
(flags & ANONCONSTR) == 0 &&
|
|
(!types.isSameType(sym.type, sym.erasure(types)) ||
|
|
signatureGen.hasTypeVar(sym.type.getThrownTypes()))) {
|
|
// note that a local class with captured variables
|
|
// will get a signature attribute
|
|
int alenIdx = writeAttr(names.Signature);
|
|
databuf.appendChar(pool.put(typeSig(sym.type)));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
acount += writeJavaAnnotations(sym.getRawAttributes());
|
|
acount += writeTypeAnnotations(sym.getRawTypeAttributes(), false);
|
|
return acount;
|
|
}
|
|
|
|
/**
|
|
* Write method parameter names attribute.
|
|
*/
|
|
int writeMethodParametersAttr(MethodSymbol m) {
|
|
MethodType ty = m.externalType(types).asMethodType();
|
|
final int allparams = ty.argtypes.size();
|
|
if (m.params != null && allparams != 0) {
|
|
final int attrIndex = writeAttr(names.MethodParameters);
|
|
databuf.appendByte(allparams);
|
|
// Write extra parameters first
|
|
for (VarSymbol s : m.extraParams) {
|
|
final int flags =
|
|
((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
|
|
((int) m.flags() & SYNTHETIC);
|
|
databuf.appendChar(pool.put(s.name));
|
|
databuf.appendChar(flags);
|
|
}
|
|
// Now write the real parameters
|
|
for (VarSymbol s : m.params) {
|
|
final int flags =
|
|
((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
|
|
((int) m.flags() & SYNTHETIC);
|
|
databuf.appendChar(pool.put(s.name));
|
|
databuf.appendChar(flags);
|
|
}
|
|
// Now write the captured locals
|
|
for (VarSymbol s : m.capturedLocals) {
|
|
final int flags =
|
|
((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
|
|
((int) m.flags() & SYNTHETIC);
|
|
databuf.appendChar(pool.put(s.name));
|
|
databuf.appendChar(flags);
|
|
}
|
|
endAttr(attrIndex);
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
|
|
/** Write method parameter annotations;
|
|
* return number of attributes written.
|
|
*/
|
|
int writeParameterAttrs(MethodSymbol m) {
|
|
boolean hasVisible = false;
|
|
boolean hasInvisible = false;
|
|
if (m.params != null) {
|
|
for (VarSymbol s : m.params) {
|
|
for (Attribute.Compound a : s.getRawAttributes()) {
|
|
switch (types.getRetention(a)) {
|
|
case SOURCE: break;
|
|
case CLASS: hasInvisible = true; break;
|
|
case RUNTIME: hasVisible = true; break;
|
|
default: ;// /* fail soft */ throw new AssertionError(vis);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int attrCount = 0;
|
|
if (hasVisible) {
|
|
int attrIndex = writeAttr(names.RuntimeVisibleParameterAnnotations);
|
|
databuf.appendByte(m.params.length());
|
|
for (VarSymbol s : m.params) {
|
|
ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
|
|
for (Attribute.Compound a : s.getRawAttributes())
|
|
if (types.getRetention(a) == RetentionPolicy.RUNTIME)
|
|
buf.append(a);
|
|
databuf.appendChar(buf.length());
|
|
for (Attribute.Compound a : buf)
|
|
writeCompoundAttribute(a);
|
|
}
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
if (hasInvisible) {
|
|
int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);
|
|
databuf.appendByte(m.params.length());
|
|
for (VarSymbol s : m.params) {
|
|
ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
|
|
for (Attribute.Compound a : s.getRawAttributes())
|
|
if (types.getRetention(a) == RetentionPolicy.CLASS)
|
|
buf.append(a);
|
|
databuf.appendChar(buf.length());
|
|
for (Attribute.Compound a : buf)
|
|
writeCompoundAttribute(a);
|
|
}
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
return attrCount;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Writing Java-language annotations (aka metadata, attributes)
|
|
**********************************************************************/
|
|
|
|
/** Write Java-language annotations; return number of JVM
|
|
* attributes written (zero or one).
|
|
*/
|
|
int writeJavaAnnotations(List<Attribute.Compound> attrs) {
|
|
if (attrs.isEmpty()) return 0;
|
|
ListBuffer<Attribute.Compound> visibles = new ListBuffer<Attribute.Compound>();
|
|
ListBuffer<Attribute.Compound> invisibles = new ListBuffer<Attribute.Compound>();
|
|
for (Attribute.Compound a : attrs) {
|
|
switch (types.getRetention(a)) {
|
|
case SOURCE: break;
|
|
case CLASS: invisibles.append(a); break;
|
|
case RUNTIME: visibles.append(a); break;
|
|
default: ;// /* fail soft */ throw new AssertionError(vis);
|
|
}
|
|
}
|
|
|
|
int attrCount = 0;
|
|
if (visibles.length() != 0) {
|
|
int attrIndex = writeAttr(names.RuntimeVisibleAnnotations);
|
|
databuf.appendChar(visibles.length());
|
|
for (Attribute.Compound a : visibles)
|
|
writeCompoundAttribute(a);
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
if (invisibles.length() != 0) {
|
|
int attrIndex = writeAttr(names.RuntimeInvisibleAnnotations);
|
|
databuf.appendChar(invisibles.length());
|
|
for (Attribute.Compound a : invisibles)
|
|
writeCompoundAttribute(a);
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
return attrCount;
|
|
}
|
|
|
|
int writeTypeAnnotations(List<Attribute.TypeCompound> typeAnnos, boolean inCode) {
|
|
if (typeAnnos.isEmpty()) return 0;
|
|
|
|
ListBuffer<Attribute.TypeCompound> visibles = new ListBuffer<>();
|
|
ListBuffer<Attribute.TypeCompound> invisibles = new ListBuffer<>();
|
|
|
|
for (Attribute.TypeCompound tc : typeAnnos) {
|
|
if (tc.hasUnknownPosition()) {
|
|
boolean fixed = tc.tryFixPosition();
|
|
|
|
// Could we fix it?
|
|
if (!fixed) {
|
|
// This happens for nested types like @A Outer. @B Inner.
|
|
// For method parameters we get the annotation twice! Once with
|
|
// a valid position, once unknown.
|
|
// TODO: find a cleaner solution.
|
|
PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
|
|
pw.println("ClassWriter: Position UNKNOWN in type annotation: " + tc);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (tc.position.type.isLocal() != inCode)
|
|
continue;
|
|
if (!tc.position.emitToClassfile())
|
|
continue;
|
|
switch (types.getRetention(tc)) {
|
|
case SOURCE: break;
|
|
case CLASS: invisibles.append(tc); break;
|
|
case RUNTIME: visibles.append(tc); break;
|
|
default: ;// /* fail soft */ throw new AssertionError(vis);
|
|
}
|
|
}
|
|
|
|
int attrCount = 0;
|
|
if (visibles.length() != 0) {
|
|
int attrIndex = writeAttr(names.RuntimeVisibleTypeAnnotations);
|
|
databuf.appendChar(visibles.length());
|
|
for (Attribute.TypeCompound p : visibles)
|
|
writeTypeAnnotation(p);
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
|
|
if (invisibles.length() != 0) {
|
|
int attrIndex = writeAttr(names.RuntimeInvisibleTypeAnnotations);
|
|
databuf.appendChar(invisibles.length());
|
|
for (Attribute.TypeCompound p : invisibles)
|
|
writeTypeAnnotation(p);
|
|
endAttr(attrIndex);
|
|
attrCount++;
|
|
}
|
|
|
|
return attrCount;
|
|
}
|
|
|
|
/** A visitor to write an attribute including its leading
|
|
* single-character marker.
|
|
*/
|
|
class AttributeWriter implements Attribute.Visitor {
|
|
public void visitConstant(Attribute.Constant _value) {
|
|
Object value = _value.value;
|
|
switch (_value.type.getTag()) {
|
|
case BYTE:
|
|
databuf.appendByte('B');
|
|
break;
|
|
case CHAR:
|
|
databuf.appendByte('C');
|
|
break;
|
|
case SHORT:
|
|
databuf.appendByte('S');
|
|
break;
|
|
case INT:
|
|
databuf.appendByte('I');
|
|
break;
|
|
case LONG:
|
|
databuf.appendByte('J');
|
|
break;
|
|
case FLOAT:
|
|
databuf.appendByte('F');
|
|
break;
|
|
case DOUBLE:
|
|
databuf.appendByte('D');
|
|
break;
|
|
case BOOLEAN:
|
|
databuf.appendByte('Z');
|
|
break;
|
|
case CLASS:
|
|
Assert.check(value instanceof String);
|
|
databuf.appendByte('s');
|
|
value = names.fromString(value.toString()); // CONSTANT_Utf8
|
|
break;
|
|
default:
|
|
throw new AssertionError(_value.type);
|
|
}
|
|
databuf.appendChar(pool.put(value));
|
|
}
|
|
public void visitEnum(Attribute.Enum e) {
|
|
databuf.appendByte('e');
|
|
databuf.appendChar(pool.put(typeSig(e.value.type)));
|
|
databuf.appendChar(pool.put(e.value.name));
|
|
}
|
|
public void visitClass(Attribute.Class clazz) {
|
|
databuf.appendByte('c');
|
|
databuf.appendChar(pool.put(typeSig(clazz.classType)));
|
|
}
|
|
public void visitCompound(Attribute.Compound compound) {
|
|
databuf.appendByte('@');
|
|
writeCompoundAttribute(compound);
|
|
}
|
|
public void visitError(Attribute.Error x) {
|
|
throw new AssertionError(x);
|
|
}
|
|
public void visitArray(Attribute.Array array) {
|
|
databuf.appendByte('[');
|
|
databuf.appendChar(array.values.length);
|
|
for (Attribute a : array.values) {
|
|
a.accept(this);
|
|
}
|
|
}
|
|
}
|
|
AttributeWriter awriter = new AttributeWriter();
|
|
|
|
/** Write a compound attribute excluding the '@' marker. */
|
|
void writeCompoundAttribute(Attribute.Compound c) {
|
|
databuf.appendChar(pool.put(typeSig(c.type)));
|
|
databuf.appendChar(c.values.length());
|
|
for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {
|
|
databuf.appendChar(pool.put(p.fst.name));
|
|
p.snd.accept(awriter);
|
|
}
|
|
}
|
|
|
|
void writeTypeAnnotation(Attribute.TypeCompound c) {
|
|
writePosition(c.position);
|
|
writeCompoundAttribute(c);
|
|
}
|
|
|
|
void writePosition(TypeAnnotationPosition p) {
|
|
databuf.appendByte(p.type.targetTypeValue()); // TargetType tag is a byte
|
|
switch (p.type) {
|
|
// instanceof
|
|
case INSTANCEOF:
|
|
// new expression
|
|
case NEW:
|
|
// constructor/method reference receiver
|
|
case CONSTRUCTOR_REFERENCE:
|
|
case METHOD_REFERENCE:
|
|
databuf.appendChar(p.offset);
|
|
break;
|
|
// local variable
|
|
case LOCAL_VARIABLE:
|
|
// resource variable
|
|
case RESOURCE_VARIABLE:
|
|
databuf.appendChar(p.lvarOffset.length); // for table length
|
|
for (int i = 0; i < p.lvarOffset.length; ++i) {
|
|
databuf.appendChar(p.lvarOffset[i]);
|
|
databuf.appendChar(p.lvarLength[i]);
|
|
databuf.appendChar(p.lvarIndex[i]);
|
|
}
|
|
break;
|
|
// exception parameter
|
|
case EXCEPTION_PARAMETER:
|
|
databuf.appendChar(p.exception_index);
|
|
break;
|
|
// method receiver
|
|
case METHOD_RECEIVER:
|
|
// Do nothing
|
|
break;
|
|
// type parameter
|
|
case CLASS_TYPE_PARAMETER:
|
|
case METHOD_TYPE_PARAMETER:
|
|
databuf.appendByte(p.parameter_index);
|
|
break;
|
|
// type parameter bound
|
|
case CLASS_TYPE_PARAMETER_BOUND:
|
|
case METHOD_TYPE_PARAMETER_BOUND:
|
|
databuf.appendByte(p.parameter_index);
|
|
databuf.appendByte(p.bound_index);
|
|
break;
|
|
// class extends or implements clause
|
|
case CLASS_EXTENDS:
|
|
databuf.appendChar(p.type_index);
|
|
break;
|
|
// throws
|
|
case THROWS:
|
|
databuf.appendChar(p.type_index);
|
|
break;
|
|
// method parameter
|
|
case METHOD_FORMAL_PARAMETER:
|
|
databuf.appendByte(p.parameter_index);
|
|
break;
|
|
// type cast
|
|
case CAST:
|
|
// method/constructor/reference type argument
|
|
case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
|
|
case METHOD_INVOCATION_TYPE_ARGUMENT:
|
|
case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
|
|
case METHOD_REFERENCE_TYPE_ARGUMENT:
|
|
databuf.appendChar(p.offset);
|
|
databuf.appendByte(p.type_index);
|
|
break;
|
|
// We don't need to worry about these
|
|
case METHOD_RETURN:
|
|
case FIELD:
|
|
break;
|
|
case UNKNOWN:
|
|
throw new AssertionError("jvm.ClassWriter: UNKNOWN target type should never occur!");
|
|
default:
|
|
throw new AssertionError("jvm.ClassWriter: Unknown target type for position: " + p);
|
|
}
|
|
|
|
{ // Append location data for generics/arrays.
|
|
databuf.appendByte(p.location.size());
|
|
java.util.List<Integer> loc = TypeAnnotationPosition.getBinaryFromTypePath(p.location);
|
|
for (int i : loc)
|
|
databuf.appendByte((byte)i);
|
|
}
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Writing Objects
|
|
**********************************************************************/
|
|
|
|
/** Enter an inner class into the `innerClasses' set/queue.
|
|
*/
|
|
void enterInner(ClassSymbol c) {
|
|
if (c.type.isCompound()) {
|
|
throw new AssertionError("Unexpected intersection type: " + c.type);
|
|
}
|
|
try {
|
|
c.complete();
|
|
} catch (CompletionFailure ex) {
|
|
System.err.println("error: " + c + ": " + ex.getMessage());
|
|
throw ex;
|
|
}
|
|
if (!c.type.hasTag(CLASS)) return; // arrays
|
|
if (pool != null && // pool might be null if called from xClassName
|
|
c.owner.enclClass() != null &&
|
|
(innerClasses == null || !innerClasses.contains(c))) {
|
|
// log.errWriter.println("enter inner " + c);//DEBUG
|
|
enterInner(c.owner.enclClass());
|
|
pool.put(c);
|
|
if (c.name != names.empty)
|
|
pool.put(c.name);
|
|
if (innerClasses == null) {
|
|
innerClasses = new HashSet<ClassSymbol>();
|
|
innerClassesQueue = new ListBuffer<ClassSymbol>();
|
|
pool.put(names.InnerClasses);
|
|
}
|
|
innerClasses.add(c);
|
|
innerClassesQueue.append(c);
|
|
}
|
|
}
|
|
|
|
/** Write "inner classes" attribute.
|
|
*/
|
|
void writeInnerClasses() {
|
|
int alenIdx = writeAttr(names.InnerClasses);
|
|
databuf.appendChar(innerClassesQueue.length());
|
|
for (List<ClassSymbol> l = innerClassesQueue.toList();
|
|
l.nonEmpty();
|
|
l = l.tail) {
|
|
ClassSymbol inner = l.head;
|
|
inner.markAbstractIfNeeded(types);
|
|
char flags = (char) adjustFlags(inner.flags_field);
|
|
if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT
|
|
if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag
|
|
flags &= ~STRICTFP; //inner classes should not have the strictfp flag set.
|
|
if (dumpInnerClassModifiers) {
|
|
PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
|
|
pw.println("INNERCLASS " + inner.name);
|
|
pw.println("---" + flagNames(flags));
|
|
}
|
|
databuf.appendChar(pool.get(inner));
|
|
databuf.appendChar(
|
|
inner.owner.kind == TYP && !inner.name.isEmpty() ? pool.get(inner.owner) : 0);
|
|
databuf.appendChar(
|
|
!inner.name.isEmpty() ? pool.get(inner.name) : 0);
|
|
databuf.appendChar(flags);
|
|
}
|
|
endAttr(alenIdx);
|
|
}
|
|
|
|
/** Write "bootstrapMethods" attribute.
|
|
*/
|
|
void writeBootstrapMethods() {
|
|
int alenIdx = writeAttr(names.BootstrapMethods);
|
|
databuf.appendChar(bootstrapMethods.size());
|
|
for (Map.Entry<DynamicMethod, MethodHandle> entry : bootstrapMethods.entrySet()) {
|
|
DynamicMethod dmeth = entry.getKey();
|
|
DynamicMethodSymbol dsym = (DynamicMethodSymbol)dmeth.baseSymbol();
|
|
//write BSM handle
|
|
databuf.appendChar(pool.get(entry.getValue()));
|
|
//write static args length
|
|
databuf.appendChar(dsym.staticArgs.length);
|
|
//write static args array
|
|
Object[] uniqueArgs = dmeth.uniqueStaticArgs;
|
|
for (Object o : uniqueArgs) {
|
|
databuf.appendChar(pool.get(o));
|
|
}
|
|
}
|
|
endAttr(alenIdx);
|
|
}
|
|
|
|
/** Write field symbol, entering all references into constant pool.
|
|
*/
|
|
void writeField(VarSymbol v) {
|
|
int flags = adjustFlags(v.flags());
|
|
databuf.appendChar(flags);
|
|
if (dumpFieldModifiers) {
|
|
PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
|
|
pw.println("FIELD " + fieldName(v));
|
|
pw.println("---" + flagNames(v.flags()));
|
|
}
|
|
databuf.appendChar(pool.put(fieldName(v)));
|
|
databuf.appendChar(pool.put(typeSig(v.erasure(types))));
|
|
int acountIdx = beginAttrs();
|
|
int acount = 0;
|
|
if (v.getConstValue() != null) {
|
|
int alenIdx = writeAttr(names.ConstantValue);
|
|
databuf.appendChar(pool.put(v.getConstValue()));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
acount += writeMemberAttrs(v);
|
|
endAttrs(acountIdx, acount);
|
|
}
|
|
|
|
/** Write method symbol, entering all references into constant pool.
|
|
*/
|
|
void writeMethod(MethodSymbol m) {
|
|
int flags = adjustFlags(m.flags());
|
|
databuf.appendChar(flags);
|
|
if (dumpMethodModifiers) {
|
|
PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
|
|
pw.println("METHOD " + fieldName(m));
|
|
pw.println("---" + flagNames(m.flags()));
|
|
}
|
|
databuf.appendChar(pool.put(fieldName(m)));
|
|
databuf.appendChar(pool.put(typeSig(m.externalType(types))));
|
|
int acountIdx = beginAttrs();
|
|
int acount = 0;
|
|
if (m.code != null) {
|
|
int alenIdx = writeAttr(names.Code);
|
|
writeCode(m.code);
|
|
m.code = null; // to conserve space
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
List<Type> thrown = m.erasure(types).getThrownTypes();
|
|
if (thrown.nonEmpty()) {
|
|
int alenIdx = writeAttr(names.Exceptions);
|
|
databuf.appendChar(thrown.length());
|
|
for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
|
|
databuf.appendChar(pool.put(l.head.tsym));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if (m.defaultValue != null) {
|
|
int alenIdx = writeAttr(names.AnnotationDefault);
|
|
m.defaultValue.accept(awriter);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
if (options.isSet(PARAMETERS))
|
|
acount += writeMethodParametersAttr(m);
|
|
acount += writeMemberAttrs(m);
|
|
acount += writeParameterAttrs(m);
|
|
endAttrs(acountIdx, acount);
|
|
}
|
|
|
|
/** Write code attribute of method.
|
|
*/
|
|
void writeCode(Code code) {
|
|
databuf.appendChar(code.max_stack);
|
|
databuf.appendChar(code.max_locals);
|
|
databuf.appendInt(code.cp);
|
|
databuf.appendBytes(code.code, 0, code.cp);
|
|
databuf.appendChar(code.catchInfo.length());
|
|
for (List<char[]> l = code.catchInfo.toList();
|
|
l.nonEmpty();
|
|
l = l.tail) {
|
|
for (int i = 0; i < l.head.length; i++)
|
|
databuf.appendChar(l.head[i]);
|
|
}
|
|
int acountIdx = beginAttrs();
|
|
int acount = 0;
|
|
|
|
if (code.lineInfo.nonEmpty()) {
|
|
int alenIdx = writeAttr(names.LineNumberTable);
|
|
databuf.appendChar(code.lineInfo.length());
|
|
for (List<char[]> l = code.lineInfo.reverse();
|
|
l.nonEmpty();
|
|
l = l.tail)
|
|
for (int i = 0; i < l.head.length; i++)
|
|
databuf.appendChar(l.head[i]);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
if (genCrt && (code.crt != null)) {
|
|
CRTable crt = code.crt;
|
|
int alenIdx = writeAttr(names.CharacterRangeTable);
|
|
int crtIdx = beginAttrs();
|
|
int crtEntries = crt.writeCRT(databuf, code.lineMap, log);
|
|
endAttrs(crtIdx, crtEntries);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
// counter for number of generic local variables
|
|
if (code.varDebugInfo && code.varBufferSize > 0) {
|
|
int nGenericVars = 0;
|
|
int alenIdx = writeAttr(names.LocalVariableTable);
|
|
databuf.appendChar(code.getLVTSize());
|
|
for (int i=0; i<code.varBufferSize; i++) {
|
|
Code.LocalVar var = code.varBuffer[i];
|
|
|
|
for (Code.LocalVar.Range r: var.aliveRanges) {
|
|
// write variable info
|
|
Assert.check(r.start_pc >= 0
|
|
&& r.start_pc <= code.cp);
|
|
databuf.appendChar(r.start_pc);
|
|
Assert.check(r.length > 0
|
|
&& (r.start_pc + r.length) <= code.cp);
|
|
databuf.appendChar(r.length);
|
|
VarSymbol sym = var.sym;
|
|
databuf.appendChar(pool.put(sym.name));
|
|
Type vartype = sym.erasure(types);
|
|
databuf.appendChar(pool.put(typeSig(vartype)));
|
|
databuf.appendChar(var.reg);
|
|
if (needsLocalVariableTypeEntry(var.sym.type)) {
|
|
nGenericVars++;
|
|
}
|
|
}
|
|
}
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
|
|
if (nGenericVars > 0) {
|
|
alenIdx = writeAttr(names.LocalVariableTypeTable);
|
|
databuf.appendChar(nGenericVars);
|
|
int count = 0;
|
|
|
|
for (int i=0; i<code.varBufferSize; i++) {
|
|
Code.LocalVar var = code.varBuffer[i];
|
|
VarSymbol sym = var.sym;
|
|
if (!needsLocalVariableTypeEntry(sym.type))
|
|
continue;
|
|
for (Code.LocalVar.Range r : var.aliveRanges) {
|
|
// write variable info
|
|
databuf.appendChar(r.start_pc);
|
|
databuf.appendChar(r.length);
|
|
databuf.appendChar(pool.put(sym.name));
|
|
databuf.appendChar(pool.put(typeSig(sym.type)));
|
|
databuf.appendChar(var.reg);
|
|
count++;
|
|
}
|
|
}
|
|
Assert.check(count == nGenericVars);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
}
|
|
|
|
if (code.stackMapBufferSize > 0) {
|
|
if (debugstackmap) System.out.println("Stack map for " + code.meth);
|
|
int alenIdx = writeAttr(code.stackMap.getAttributeName(names));
|
|
writeStackMap(code);
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
acount += writeTypeAnnotations(code.meth.getRawTypeAttributes(), true);
|
|
|
|
endAttrs(acountIdx, acount);
|
|
}
|
|
//where
|
|
private boolean needsLocalVariableTypeEntry(Type t) {
|
|
//a local variable needs a type-entry if its type T is generic
|
|
//(i.e. |T| != T) and if it's not an intersection type (not supported
|
|
//in signature attribute grammar)
|
|
return (!types.isSameType(t, types.erasure(t)) &&
|
|
!t.isCompound());
|
|
}
|
|
|
|
void writeStackMap(Code code) {
|
|
int nframes = code.stackMapBufferSize;
|
|
if (debugstackmap) System.out.println(" nframes = " + nframes);
|
|
databuf.appendChar(nframes);
|
|
|
|
switch (code.stackMap) {
|
|
case CLDC:
|
|
for (int i=0; i<nframes; i++) {
|
|
if (debugstackmap) System.out.print(" " + i + ":");
|
|
Code.StackMapFrame frame = code.stackMapBuffer[i];
|
|
|
|
// output PC
|
|
if (debugstackmap) System.out.print(" pc=" + frame.pc);
|
|
databuf.appendChar(frame.pc);
|
|
|
|
// output locals
|
|
int localCount = 0;
|
|
for (int j=0; j<frame.locals.length;
|
|
j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
|
|
localCount++;
|
|
}
|
|
if (debugstackmap) System.out.print(" nlocals=" +
|
|
localCount);
|
|
databuf.appendChar(localCount);
|
|
for (int j=0; j<frame.locals.length;
|
|
j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
|
|
if (debugstackmap) System.out.print(" local[" + j + "]=");
|
|
writeStackMapType(frame.locals[j]);
|
|
}
|
|
|
|
// output stack
|
|
int stackCount = 0;
|
|
for (int j=0; j<frame.stack.length;
|
|
j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
|
|
stackCount++;
|
|
}
|
|
if (debugstackmap) System.out.print(" nstack=" +
|
|
stackCount);
|
|
databuf.appendChar(stackCount);
|
|
for (int j=0; j<frame.stack.length;
|
|
j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
|
|
if (debugstackmap) System.out.print(" stack[" + j + "]=");
|
|
writeStackMapType(frame.stack[j]);
|
|
}
|
|
if (debugstackmap) System.out.println();
|
|
}
|
|
break;
|
|
case JSR202: {
|
|
Assert.checkNull(code.stackMapBuffer);
|
|
for (int i=0; i<nframes; i++) {
|
|
if (debugstackmap) System.out.print(" " + i + ":");
|
|
StackMapTableFrame frame = code.stackMapTableBuffer[i];
|
|
frame.write(this);
|
|
if (debugstackmap) System.out.println();
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
throw new AssertionError("Unexpected stackmap format value");
|
|
}
|
|
}
|
|
|
|
//where
|
|
void writeStackMapType(Type t) {
|
|
if (t == null) {
|
|
if (debugstackmap) System.out.print("empty");
|
|
databuf.appendByte(0);
|
|
}
|
|
else switch(t.getTag()) {
|
|
case BYTE:
|
|
case CHAR:
|
|
case SHORT:
|
|
case INT:
|
|
case BOOLEAN:
|
|
if (debugstackmap) System.out.print("int");
|
|
databuf.appendByte(1);
|
|
break;
|
|
case FLOAT:
|
|
if (debugstackmap) System.out.print("float");
|
|
databuf.appendByte(2);
|
|
break;
|
|
case DOUBLE:
|
|
if (debugstackmap) System.out.print("double");
|
|
databuf.appendByte(3);
|
|
break;
|
|
case LONG:
|
|
if (debugstackmap) System.out.print("long");
|
|
databuf.appendByte(4);
|
|
break;
|
|
case BOT: // null
|
|
if (debugstackmap) System.out.print("null");
|
|
databuf.appendByte(5);
|
|
break;
|
|
case CLASS:
|
|
case ARRAY:
|
|
if (debugstackmap) System.out.print("object(" + t + ")");
|
|
databuf.appendByte(7);
|
|
databuf.appendChar(pool.put(t));
|
|
break;
|
|
case TYPEVAR:
|
|
if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");
|
|
databuf.appendByte(7);
|
|
databuf.appendChar(pool.put(types.erasure(t).tsym));
|
|
break;
|
|
case UNINITIALIZED_THIS:
|
|
if (debugstackmap) System.out.print("uninit_this");
|
|
databuf.appendByte(6);
|
|
break;
|
|
case UNINITIALIZED_OBJECT:
|
|
{ UninitializedType uninitType = (UninitializedType)t;
|
|
databuf.appendByte(8);
|
|
if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);
|
|
databuf.appendChar(uninitType.offset);
|
|
}
|
|
break;
|
|
default:
|
|
throw new AssertionError();
|
|
}
|
|
}
|
|
|
|
/** An entry in the JSR202 StackMapTable */
|
|
abstract static class StackMapTableFrame {
|
|
abstract int getFrameType();
|
|
|
|
void write(ClassWriter writer) {
|
|
int frameType = getFrameType();
|
|
writer.databuf.appendByte(frameType);
|
|
if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);
|
|
}
|
|
|
|
static class SameFrame extends StackMapTableFrame {
|
|
final int offsetDelta;
|
|
SameFrame(int offsetDelta) {
|
|
this.offsetDelta = offsetDelta;
|
|
}
|
|
int getFrameType() {
|
|
return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;
|
|
}
|
|
@Override
|
|
void write(ClassWriter writer) {
|
|
super.write(writer);
|
|
if (getFrameType() == SAME_FRAME_EXTENDED) {
|
|
writer.databuf.appendChar(offsetDelta);
|
|
if (writer.debugstackmap){
|
|
System.out.print(" offset_delta=" + offsetDelta);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static class SameLocals1StackItemFrame extends StackMapTableFrame {
|
|
final int offsetDelta;
|
|
final Type stack;
|
|
SameLocals1StackItemFrame(int offsetDelta, Type stack) {
|
|
this.offsetDelta = offsetDelta;
|
|
this.stack = stack;
|
|
}
|
|
int getFrameType() {
|
|
return (offsetDelta < SAME_FRAME_SIZE) ?
|
|
(SAME_FRAME_SIZE + offsetDelta) :
|
|
SAME_LOCALS_1_STACK_ITEM_EXTENDED;
|
|
}
|
|
@Override
|
|
void write(ClassWriter writer) {
|
|
super.write(writer);
|
|
if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
|
|
writer.databuf.appendChar(offsetDelta);
|
|
if (writer.debugstackmap) {
|
|
System.out.print(" offset_delta=" + offsetDelta);
|
|
}
|
|
}
|
|
if (writer.debugstackmap) {
|
|
System.out.print(" stack[" + 0 + "]=");
|
|
}
|
|
writer.writeStackMapType(stack);
|
|
}
|
|
}
|
|
|
|
static class ChopFrame extends StackMapTableFrame {
|
|
final int frameType;
|
|
final int offsetDelta;
|
|
ChopFrame(int frameType, int offsetDelta) {
|
|
this.frameType = frameType;
|
|
this.offsetDelta = offsetDelta;
|
|
}
|
|
int getFrameType() { return frameType; }
|
|
@Override
|
|
void write(ClassWriter writer) {
|
|
super.write(writer);
|
|
writer.databuf.appendChar(offsetDelta);
|
|
if (writer.debugstackmap) {
|
|
System.out.print(" offset_delta=" + offsetDelta);
|
|
}
|
|
}
|
|
}
|
|
|
|
static class AppendFrame extends StackMapTableFrame {
|
|
final int frameType;
|
|
final int offsetDelta;
|
|
final Type[] locals;
|
|
AppendFrame(int frameType, int offsetDelta, Type[] locals) {
|
|
this.frameType = frameType;
|
|
this.offsetDelta = offsetDelta;
|
|
this.locals = locals;
|
|
}
|
|
int getFrameType() { return frameType; }
|
|
@Override
|
|
void write(ClassWriter writer) {
|
|
super.write(writer);
|
|
writer.databuf.appendChar(offsetDelta);
|
|
if (writer.debugstackmap) {
|
|
System.out.print(" offset_delta=" + offsetDelta);
|
|
}
|
|
for (int i=0; i<locals.length; i++) {
|
|
if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
|
|
writer.writeStackMapType(locals[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static class FullFrame extends StackMapTableFrame {
|
|
final int offsetDelta;
|
|
final Type[] locals;
|
|
final Type[] stack;
|
|
FullFrame(int offsetDelta, Type[] locals, Type[] stack) {
|
|
this.offsetDelta = offsetDelta;
|
|
this.locals = locals;
|
|
this.stack = stack;
|
|
}
|
|
int getFrameType() { return FULL_FRAME; }
|
|
@Override
|
|
void write(ClassWriter writer) {
|
|
super.write(writer);
|
|
writer.databuf.appendChar(offsetDelta);
|
|
writer.databuf.appendChar(locals.length);
|
|
if (writer.debugstackmap) {
|
|
System.out.print(" offset_delta=" + offsetDelta);
|
|
System.out.print(" nlocals=" + locals.length);
|
|
}
|
|
for (int i=0; i<locals.length; i++) {
|
|
if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
|
|
writer.writeStackMapType(locals[i]);
|
|
}
|
|
|
|
writer.databuf.appendChar(stack.length);
|
|
if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }
|
|
for (int i=0; i<stack.length; i++) {
|
|
if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");
|
|
writer.writeStackMapType(stack[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Compare this frame with the previous frame and produce
|
|
* an entry of compressed stack map frame. */
|
|
static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,
|
|
int prev_pc,
|
|
Type[] prev_locals,
|
|
Types types) {
|
|
Type[] locals = this_frame.locals;
|
|
Type[] stack = this_frame.stack;
|
|
int offset_delta = this_frame.pc - prev_pc - 1;
|
|
if (stack.length == 1) {
|
|
if (locals.length == prev_locals.length
|
|
&& compare(prev_locals, locals, types) == 0) {
|
|
return new SameLocals1StackItemFrame(offset_delta, stack[0]);
|
|
}
|
|
} else if (stack.length == 0) {
|
|
int diff_length = compare(prev_locals, locals, types);
|
|
if (diff_length == 0) {
|
|
return new SameFrame(offset_delta);
|
|
} else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {
|
|
// APPEND
|
|
Type[] local_diff = new Type[-diff_length];
|
|
for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {
|
|
local_diff[j] = locals[i];
|
|
}
|
|
return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,
|
|
offset_delta,
|
|
local_diff);
|
|
} else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {
|
|
// CHOP
|
|
return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,
|
|
offset_delta);
|
|
}
|
|
}
|
|
// FULL_FRAME
|
|
return new FullFrame(offset_delta, locals, stack);
|
|
}
|
|
|
|
static boolean isInt(Type t) {
|
|
return (t.getTag().isStrictSubRangeOf(INT) || t.hasTag(BOOLEAN));
|
|
}
|
|
|
|
static boolean isSameType(Type t1, Type t2, Types types) {
|
|
if (t1 == null) { return t2 == null; }
|
|
if (t2 == null) { return false; }
|
|
|
|
if (isInt(t1) && isInt(t2)) { return true; }
|
|
|
|
if (t1.hasTag(UNINITIALIZED_THIS)) {
|
|
return t2.hasTag(UNINITIALIZED_THIS);
|
|
} else if (t1.hasTag(UNINITIALIZED_OBJECT)) {
|
|
if (t2.hasTag(UNINITIALIZED_OBJECT)) {
|
|
return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;
|
|
} else {
|
|
return false;
|
|
}
|
|
} else if (t2.hasTag(UNINITIALIZED_THIS) || t2.hasTag(UNINITIALIZED_OBJECT)) {
|
|
return false;
|
|
}
|
|
|
|
return types.isSameType(t1, t2);
|
|
}
|
|
|
|
static int compare(Type[] arr1, Type[] arr2, Types types) {
|
|
int diff_length = arr1.length - arr2.length;
|
|
if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {
|
|
return Integer.MAX_VALUE;
|
|
}
|
|
int len = (diff_length > 0) ? arr2.length : arr1.length;
|
|
for (int i=0; i<len; i++) {
|
|
if (!isSameType(arr1[i], arr2[i], types)) {
|
|
return Integer.MAX_VALUE;
|
|
}
|
|
}
|
|
return diff_length;
|
|
}
|
|
}
|
|
|
|
void writeFields(Scope.Entry e) {
|
|
// process them in reverse sibling order;
|
|
// i.e., process them in declaration order.
|
|
List<VarSymbol> vars = List.nil();
|
|
for (Scope.Entry i = e; i != null; i = i.sibling) {
|
|
if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);
|
|
}
|
|
while (vars.nonEmpty()) {
|
|
writeField(vars.head);
|
|
vars = vars.tail;
|
|
}
|
|
}
|
|
|
|
void writeMethods(Scope.Entry e) {
|
|
List<MethodSymbol> methods = List.nil();
|
|
for (Scope.Entry i = e; i != null; i = i.sibling) {
|
|
if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)
|
|
methods = methods.prepend((MethodSymbol)i.sym);
|
|
}
|
|
while (methods.nonEmpty()) {
|
|
writeMethod(methods.head);
|
|
methods = methods.tail;
|
|
}
|
|
}
|
|
|
|
/** Emit a class file for a given class.
|
|
* @param c The class from which a class file is generated.
|
|
*/
|
|
public JavaFileObject writeClass(ClassSymbol c)
|
|
throws IOException, PoolOverflow, StringOverflow
|
|
{
|
|
JavaFileObject outFile
|
|
= fileManager.getJavaFileForOutput(CLASS_OUTPUT,
|
|
c.flatname.toString(),
|
|
JavaFileObject.Kind.CLASS,
|
|
c.sourcefile);
|
|
OutputStream out = outFile.openOutputStream();
|
|
try {
|
|
writeClassFile(out, c);
|
|
if (verbose)
|
|
log.printVerbose("wrote.file", outFile);
|
|
out.close();
|
|
out = null;
|
|
} finally {
|
|
if (out != null) {
|
|
// if we are propagating an exception, delete the file
|
|
out.close();
|
|
outFile.delete();
|
|
outFile = null;
|
|
}
|
|
}
|
|
return outFile; // may be null if write failed
|
|
}
|
|
|
|
/** Write class `c' to outstream `out'.
|
|
*/
|
|
public void writeClassFile(OutputStream out, ClassSymbol c)
|
|
throws IOException, PoolOverflow, StringOverflow {
|
|
Assert.check((c.flags() & COMPOUND) == 0);
|
|
databuf.reset();
|
|
poolbuf.reset();
|
|
signatureGen.reset();
|
|
pool = c.pool;
|
|
innerClasses = null;
|
|
innerClassesQueue = null;
|
|
bootstrapMethods = new LinkedHashMap<DynamicMethod, MethodHandle>();
|
|
|
|
Type supertype = types.supertype(c.type);
|
|
List<Type> interfaces = types.interfaces(c.type);
|
|
List<Type> typarams = c.type.getTypeArguments();
|
|
|
|
int flags = adjustFlags(c.flags() & ~DEFAULT);
|
|
if ((flags & PROTECTED) != 0) flags |= PUBLIC;
|
|
flags = flags & ClassFlags & ~STRICTFP;
|
|
if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
|
|
if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;
|
|
if (dumpClassModifiers) {
|
|
PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
|
|
pw.println();
|
|
pw.println("CLASSFILE " + c.getQualifiedName());
|
|
pw.println("---" + flagNames(flags));
|
|
}
|
|
databuf.appendChar(flags);
|
|
|
|
databuf.appendChar(pool.put(c));
|
|
databuf.appendChar(supertype.hasTag(CLASS) ? pool.put(supertype.tsym) : 0);
|
|
databuf.appendChar(interfaces.length());
|
|
for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
|
|
databuf.appendChar(pool.put(l.head.tsym));
|
|
int fieldsCount = 0;
|
|
int methodsCount = 0;
|
|
for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {
|
|
switch (e.sym.kind) {
|
|
case VAR: fieldsCount++; break;
|
|
case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
|
|
break;
|
|
case TYP: enterInner((ClassSymbol)e.sym); break;
|
|
default : Assert.error();
|
|
}
|
|
}
|
|
|
|
if (c.trans_local != null) {
|
|
for (ClassSymbol local : c.trans_local) {
|
|
enterInner(local);
|
|
}
|
|
}
|
|
|
|
databuf.appendChar(fieldsCount);
|
|
writeFields(c.members().elems);
|
|
databuf.appendChar(methodsCount);
|
|
writeMethods(c.members().elems);
|
|
|
|
int acountIdx = beginAttrs();
|
|
int acount = 0;
|
|
|
|
boolean sigReq =
|
|
typarams.length() != 0 || supertype.allparams().length() != 0;
|
|
for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)
|
|
sigReq = l.head.allparams().length() != 0;
|
|
if (sigReq) {
|
|
Assert.check(source.allowGenerics());
|
|
int alenIdx = writeAttr(names.Signature);
|
|
if (typarams.length() != 0) signatureGen.assembleParamsSig(typarams);
|
|
signatureGen.assembleSig(supertype);
|
|
for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
|
|
signatureGen.assembleSig(l.head);
|
|
databuf.appendChar(pool.put(signatureGen.toName()));
|
|
signatureGen.reset();
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
if (c.sourcefile != null && emitSourceFile) {
|
|
int alenIdx = writeAttr(names.SourceFile);
|
|
// WHM 6/29/1999: Strip file path prefix. We do it here at
|
|
// the last possible moment because the sourcefile may be used
|
|
// elsewhere in error diagnostics. Fixes 4241573.
|
|
//databuf.appendChar(c.pool.put(c.sourcefile));
|
|
String simpleName = BaseFileObject.getSimpleName(c.sourcefile);
|
|
databuf.appendChar(c.pool.put(names.fromString(simpleName)));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
if (genCrt) {
|
|
// Append SourceID attribute
|
|
int alenIdx = writeAttr(names.SourceID);
|
|
databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
// Append CompilationID attribute
|
|
alenIdx = writeAttr(names.CompilationID);
|
|
databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));
|
|
endAttr(alenIdx);
|
|
acount++;
|
|
}
|
|
|
|
acount += writeFlagAttrs(c.flags());
|
|
acount += writeJavaAnnotations(c.getRawAttributes());
|
|
acount += writeTypeAnnotations(c.getRawTypeAttributes(), false);
|
|
acount += writeEnclosingMethodAttribute(c);
|
|
acount += writeExtraClassAttributes(c);
|
|
|
|
poolbuf.appendInt(JAVA_MAGIC);
|
|
poolbuf.appendChar(target.minorVersion);
|
|
poolbuf.appendChar(target.majorVersion);
|
|
|
|
writePool(c.pool);
|
|
|
|
if (innerClasses != null) {
|
|
writeInnerClasses();
|
|
acount++;
|
|
}
|
|
|
|
if (!bootstrapMethods.isEmpty()) {
|
|
writeBootstrapMethods();
|
|
acount++;
|
|
}
|
|
|
|
endAttrs(acountIdx, acount);
|
|
|
|
poolbuf.appendBytes(databuf.elems, 0, databuf.length);
|
|
out.write(poolbuf.elems, 0, poolbuf.length);
|
|
|
|
pool = c.pool = null; // to conserve space
|
|
}
|
|
|
|
/**Allows subclasses to write additional class attributes
|
|
*
|
|
* @return the number of attributes written
|
|
*/
|
|
protected int writeExtraClassAttributes(ClassSymbol c) {
|
|
return 0;
|
|
}
|
|
|
|
int adjustFlags(final long flags) {
|
|
int result = (int)flags;
|
|
if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag())
|
|
result &= ~SYNTHETIC;
|
|
if ((flags & ENUM) != 0 && !target.useEnumFlag())
|
|
result &= ~ENUM;
|
|
if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag())
|
|
result &= ~ANNOTATION;
|
|
|
|
if ((flags & BRIDGE) != 0 && target.useBridgeFlag())
|
|
result |= ACC_BRIDGE;
|
|
if ((flags & VARARGS) != 0 && target.useVarargsFlag())
|
|
result |= ACC_VARARGS;
|
|
if ((flags & DEFAULT) != 0)
|
|
result &= ~ABSTRACT;
|
|
return result;
|
|
}
|
|
|
|
long getLastModified(FileObject filename) {
|
|
long mod = 0;
|
|
try {
|
|
mod = filename.getLastModified();
|
|
} catch (SecurityException e) {
|
|
throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());
|
|
}
|
|
return mod;
|
|
}
|
|
}
|