--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassWriter.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,1877 @@
+/*
+ * Copyright (c) 1999, 2016, 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 com.sun.tools.javac.jvm;
+
+import java.io.*;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+
+import javax.tools.JavaFileManager;
+import javax.tools.FileObject;
+import javax.tools.JavaFileManager.Location;
+import javax.tools.JavaFileObject;
+
+import com.sun.tools.javac.code.*;
+import com.sun.tools.javac.code.Attribute.RetentionPolicy;
+import com.sun.tools.javac.code.Directive.*;
+import com.sun.tools.javac.code.Symbol.*;
+import com.sun.tools.javac.code.Type.*;
+import com.sun.tools.javac.code.Types.UniqueType;
+import com.sun.tools.javac.file.PathFileObject;
+import com.sun.tools.javac.jvm.Pool.DynamicMethod;
+import com.sun.tools.javac.jvm.Pool.Method;
+import com.sun.tools.javac.jvm.Pool.MethodHandle;
+import com.sun.tools.javac.jvm.Pool.Variable;
+import com.sun.tools.javac.main.Option;
+import com.sun.tools.javac.util.*;
+
+import static com.sun.tools.javac.code.Flags.*;
+import static com.sun.tools.javac.code.Kinds.Kind.*;
+import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE;
+import static com.sun.tools.javac.code.TypeTag.*;
+import static com.sun.tools.javac.main.Option.*;
+
+import static javax.tools.StandardLocation.CLASS_OUTPUT;
+
+/** This class provides operations to map an internal symbol table graph
+ * rooted in a ClassSymbol into a classfile.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ */
+public class ClassWriter extends ClassFile {
+ protected static final Context.Key<ClassWriter> classWriterKey = new Context.Key<>();
+
+ private final Options options;
+
+ /** Switch: verbose output.
+ */
+ private boolean verbose;
+
+ /** Switch: emit source file attribute.
+ */
+ private boolean emitSourceFile;
+
+ /** Switch: generate CharacterRangeTable attribute.
+ */
+ private boolean genCrt;
+
+ /** Switch: describe the generated stackmap.
+ */
+ private boolean debugstackmap;
+
+ /**
+ * Target class version.
+ */
+ private Target target;
+
+ /**
+ * Source language version.
+ */
+ private Source source;
+
+ /** Type utilities. */
+ private Types types;
+
+ /**
+ * If true, class files will be written in module-specific subdirectories
+ * of the CLASS_OUTPUT location.
+ */
+ public boolean multiModuleMode;
+
+ /** The initial sizes of the data and constant pool buffers.
+ * Sizes are increased when buffers get full.
+ */
+ static final int DATA_BUF_SIZE = 0x0fff0;
+ static final int POOL_BUF_SIZE = 0x1fff0;
+
+ /** An output buffer for member info.
+ */
+ ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
+
+ /** An output buffer for the constant pool.
+ */
+ ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
+
+ /** The constant pool.
+ */
+ Pool pool;
+
+ /** The inner classes to be written, as a set.
+ */
+ Set<ClassSymbol> innerClasses;
+
+ /** The inner classes to be written, as a queue where
+ * enclosing classes come first.
+ */
+ ListBuffer<ClassSymbol> innerClassesQueue;
+
+ /** The bootstrap methods to be written in the corresponding class attribute
+ * (one for each invokedynamic)
+ */
+ Map<DynamicMethod.BootstrapMethodsKey, DynamicMethod.BootstrapMethodsValue> bootstrapMethods;
+
+ /** The log to use for verbose output.
+ */
+ private final Log log;
+
+ /** The name table. */
+ private final Names names;
+
+ /** Access to files. */
+ private final JavaFileManager fileManager;
+
+ /** Sole signature generator */
+ private final CWSignatureGenerator signatureGen;
+
+ /** The tags and constants used in compressed stackmap. */
+ static final int SAME_FRAME_SIZE = 64;
+ static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
+ static final int SAME_FRAME_EXTENDED = 251;
+ static final int FULL_FRAME = 255;
+ static final int MAX_LOCAL_LENGTH_DIFF = 4;
+
+ /** Get the ClassWriter instance for this context. */
+ public static ClassWriter instance(Context context) {
+ ClassWriter instance = context.get(classWriterKey);
+ if (instance == null)
+ instance = new ClassWriter(context);
+ return instance;
+ }
+
+ /** Construct a class writer, given an options table.
+ */
+ protected ClassWriter(Context context) {
+ context.put(classWriterKey, this);
+
+ log = Log.instance(context);
+ names = Names.instance(context);
+ options = Options.instance(context);
+ target = Target.instance(context);
+ source = Source.instance(context);
+ types = Types.instance(context);
+ fileManager = context.get(JavaFileManager.class);
+ signatureGen = new CWSignatureGenerator(types);
+
+ verbose = options.isSet(VERBOSE);
+ genCrt = options.isSet(XJCOV);
+ debugstackmap = options.isSet("debug.stackmap");
+
+ emitSourceFile = options.isUnset(G_CUSTOM) ||
+ options.isSet(G_CUSTOM, "source");
+
+ String modifierFlags = options.get("debug.dumpmodifiers");
+ if (modifierFlags != null) {
+ dumpClassModifiers = modifierFlags.indexOf('c') != -1;
+ dumpFieldModifiers = modifierFlags.indexOf('f') != -1;
+ dumpInnerClassModifiers = modifierFlags.indexOf('i') != -1;
+ dumpMethodModifiers = modifierFlags.indexOf('m') != -1;
+ }
+ }
+
+/******************************************************************
+ * Diagnostics: dump generated class names and modifiers
+ ******************************************************************/
+
+ /** Value of option 'dumpmodifiers' is a string
+ * indicating which modifiers should be dumped for debugging:
+ * 'c' -- classes
+ * 'f' -- fields
+ * 'i' -- innerclass attributes
+ * 'm' -- methods
+ * For example, to dump everything:
+ * javac -XDdumpmodifiers=cifm MyProg.java
+ */
+ private boolean dumpClassModifiers; // -XDdumpmodifiers=c
+ private boolean dumpFieldModifiers; // -XDdumpmodifiers=f
+ private boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
+ private boolean dumpMethodModifiers; // -XDdumpmodifiers=m
+
+
+ /** Return flags as a string, separated by " ".
+ */
+ public static String flagNames(long flags) {
+ StringBuilder sbuf = new StringBuilder();
+ int i = 0;
+ long f = flags & StandardFlags;
+ while (f != 0) {
+ if ((f & 1) != 0) {
+ sbuf.append(" ");
+ sbuf.append(flagName[i]);
+ }
+ f = f >> 1;
+ i++;
+ }
+ return sbuf.toString();
+ }
+ //where
+ private final static String[] flagName = {
+ "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
+ "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
+ "ABSTRACT", "STRICTFP"};
+
+/******************************************************************
+ * Output routines
+ ******************************************************************/
+
+ /** Write a character into given byte buffer;
+ * byte buffer will not be grown.
+ */
+ void putChar(ByteBuffer buf, int op, int x) {
+ buf.elems[op ] = (byte)((x >> 8) & 0xFF);
+ buf.elems[op+1] = (byte)((x ) & 0xFF);
+ }
+
+ /** Write an integer into given byte buffer;
+ * byte buffer will not be grown.
+ */
+ void putInt(ByteBuffer buf, int adr, int x) {
+ buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
+ buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
+ buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
+ buf.elems[adr+3] = (byte)((x ) & 0xFF);
+ }
+
+ /**
+ * Signature Generation
+ */
+ private class CWSignatureGenerator extends Types.SignatureGenerator {
+
+ /**
+ * An output buffer for type signatures.
+ */
+ ByteBuffer sigbuf = new ByteBuffer();
+
+ CWSignatureGenerator(Types types) {
+ super(types);
+ }
+
+ /**
+ * Assemble signature of given type in string buffer.
+ * Check for uninitialized types before calling the general case.
+ */
+ @Override
+ public void assembleSig(Type type) {
+ switch (type.getTag()) {
+ case UNINITIALIZED_THIS:
+ case UNINITIALIZED_OBJECT:
+ // we don't yet have a spec for uninitialized types in the
+ // local variable table
+ assembleSig(types.erasure(((UninitializedType)type).qtype));
+ break;
+ default:
+ super.assembleSig(type);
+ }
+ }
+
+ @Override
+ protected void append(char ch) {
+ sigbuf.appendByte(ch);
+ }
+
+ @Override
+ protected void append(byte[] ba) {
+ sigbuf.appendBytes(ba);
+ }
+
+ @Override
+ protected void append(Name name) {
+ sigbuf.appendName(name);
+ }
+
+ @Override
+ protected void classReference(ClassSymbol c) {
+ enterInner(c);
+ }
+
+ private void reset() {
+ sigbuf.reset();
+ }
+
+ private Name toName() {
+ return sigbuf.toName(names);
+ }
+
+ private boolean isEmpty() {
+ return sigbuf.length == 0;
+ }
+ }
+
+ /**
+ * Return signature of given type
+ */
+ Name typeSig(Type type) {
+ Assert.check(signatureGen.isEmpty());
+ //- System.out.println(" ? " + type);
+ signatureGen.assembleSig(type);
+ Name n = signatureGen.toName();
+ signatureGen.reset();
+ //- System.out.println(" " + n);
+ return n;
+ }
+
+ /** Given a type t, return the extended class name of its erasure in
+ * external representation.
+ */
+ public Name xClassName(Type t) {
+ if (t.hasTag(CLASS)) {
+ return names.fromUtf(externalize(t.tsym.flatName()));
+ } else if (t.hasTag(ARRAY)) {
+ return typeSig(types.erasure(t));
+ } else {
+ throw new AssertionError("xClassName expects class or array type, got " + t);
+ }
+ }
+
+/******************************************************************
+ * Writing the Constant Pool
+ ******************************************************************/
+
+ /** Thrown when the constant pool is over full.
+ */
+ public static class PoolOverflow extends Exception {
+ private static final long serialVersionUID = 0;
+ public PoolOverflow() {}
+ }
+ public static class StringOverflow extends Exception {
+ private static final long serialVersionUID = 0;
+ public final String value;
+ public StringOverflow(String s) {
+ value = s;
+ }
+ }
+
+ /** Write constant pool to pool buffer.
+ * Note: during writing, constant pool
+ * might grow since some parts of constants still need to be entered.
+ */
+ void writePool(Pool pool) throws PoolOverflow, StringOverflow {
+ int poolCountIdx = poolbuf.length;
+ poolbuf.appendChar(0);
+ int i = 1;
+ while (i < pool.pp) {
+ Object value = pool.pool[i];
+ Assert.checkNonNull(value);
+ if (value instanceof Method || value instanceof Variable)
+ value = ((DelegatedSymbol)value).getUnderlyingSymbol();
+
+ if (value instanceof MethodSymbol) {
+ MethodSymbol m = (MethodSymbol)value;
+ if (!m.isDynamic()) {
+ poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
+ ? CONSTANT_InterfaceMethodref
+ : CONSTANT_Methodref);
+ poolbuf.appendChar(pool.put(m.owner));
+ poolbuf.appendChar(pool.put(nameType(m)));
+ } else {
+ //invokedynamic
+ DynamicMethodSymbol dynSym = (DynamicMethodSymbol)m;
+ MethodHandle handle = new MethodHandle(dynSym.bsmKind, dynSym.bsm, types);
+ DynamicMethod.BootstrapMethodsKey key = new DynamicMethod.BootstrapMethodsKey(dynSym, types);
+
+ // Figure out the index for existing BSM; create a new BSM if no key
+ DynamicMethod.BootstrapMethodsValue val = bootstrapMethods.get(key);
+ if (val == null) {
+ int index = bootstrapMethods.size();
+ val = new DynamicMethod.BootstrapMethodsValue(handle, index);
+ bootstrapMethods.put(key, val);
+ }
+
+ //init cp entries
+ pool.put(names.BootstrapMethods);
+ pool.put(handle);
+ for (Object staticArg : dynSym.staticArgs) {
+ pool.put(staticArg);
+ }
+ poolbuf.appendByte(CONSTANT_InvokeDynamic);
+ poolbuf.appendChar(val.index);
+ poolbuf.appendChar(pool.put(nameType(dynSym)));
+ }
+ } else if (value instanceof VarSymbol) {
+ VarSymbol v = (VarSymbol)value;
+ poolbuf.appendByte(CONSTANT_Fieldref);
+ poolbuf.appendChar(pool.put(v.owner));
+ poolbuf.appendChar(pool.put(nameType(v)));
+ } else if (value instanceof Name) {
+ poolbuf.appendByte(CONSTANT_Utf8);
+ byte[] bs = ((Name)value).toUtf();
+ poolbuf.appendChar(bs.length);
+ poolbuf.appendBytes(bs, 0, bs.length);
+ if (bs.length > Pool.MAX_STRING_LENGTH)
+ throw new StringOverflow(value.toString());
+ } else if (value instanceof ClassSymbol) {
+ ClassSymbol c = (ClassSymbol)value;
+ if (c.owner.kind == TYP) pool.put(c.owner);
+ poolbuf.appendByte(CONSTANT_Class);
+ if (c.type.hasTag(ARRAY)) {
+ poolbuf.appendChar(pool.put(typeSig(c.type)));
+ } else {
+ poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
+ enterInner(c);
+ }
+ } else if (value instanceof NameAndType) {
+ NameAndType nt = (NameAndType)value;
+ poolbuf.appendByte(CONSTANT_NameandType);
+ poolbuf.appendChar(pool.put(nt.name));
+ poolbuf.appendChar(pool.put(typeSig(nt.uniqueType.type)));
+ } else if (value instanceof Integer) {
+ poolbuf.appendByte(CONSTANT_Integer);
+ poolbuf.appendInt(((Integer)value).intValue());
+ } else if (value instanceof Long) {
+ poolbuf.appendByte(CONSTANT_Long);
+ poolbuf.appendLong(((Long)value).longValue());
+ i++;
+ } else if (value instanceof Float) {
+ poolbuf.appendByte(CONSTANT_Float);
+ poolbuf.appendFloat(((Float)value).floatValue());
+ } else if (value instanceof Double) {
+ poolbuf.appendByte(CONSTANT_Double);
+ poolbuf.appendDouble(((Double)value).doubleValue());
+ i++;
+ } else if (value instanceof String) {
+ poolbuf.appendByte(CONSTANT_String);
+ poolbuf.appendChar(pool.put(names.fromString((String)value)));
+ } else if (value instanceof UniqueType) {
+ Type type = ((UniqueType)value).type;
+ if (type.hasTag(METHOD)) {
+ poolbuf.appendByte(CONSTANT_MethodType);
+ poolbuf.appendChar(pool.put(typeSig((MethodType)type)));
+ } else {
+ Assert.check(type.hasTag(ARRAY));
+ poolbuf.appendByte(CONSTANT_Class);
+ poolbuf.appendChar(pool.put(xClassName(type)));
+ }
+ } else if (value instanceof MethodHandle) {
+ MethodHandle ref = (MethodHandle)value;
+ poolbuf.appendByte(CONSTANT_MethodHandle);
+ poolbuf.appendByte(ref.refKind);
+ poolbuf.appendChar(pool.put(ref.refSym));
+ } else if (value instanceof ModuleSymbol) {
+ ModuleSymbol m = (ModuleSymbol)value;
+ poolbuf.appendByte(CONSTANT_Module);
+ poolbuf.appendChar(pool.put(m.name));
+ } else if (value instanceof PackageSymbol) {
+ PackageSymbol m = (PackageSymbol)value;
+ poolbuf.appendByte(CONSTANT_Package);
+ poolbuf.appendChar(pool.put(names.fromUtf(externalize(m.fullname))));
+ } else {
+ Assert.error("writePool " + value);
+ }
+ i++;
+ }
+ if (pool.pp > Pool.MAX_ENTRIES)
+ throw new PoolOverflow();
+ putChar(poolbuf, poolCountIdx, pool.pp);
+ }
+
+ /** Given a symbol, return its name-and-type.
+ */
+ NameAndType nameType(Symbol sym) {
+ return new NameAndType(sym.name, sym.externalType(types), types);
+ // the NameAndType is generated from a symbol reference, and the
+ // adjustment of adding an additional this$n parameter needs to be made.
+ }
+
+/******************************************************************
+ * Writing Attributes
+ ******************************************************************/
+
+ /** Write header for an attribute to data buffer and return
+ * position past attribute length index.
+ */
+ int writeAttr(Name attrName) {
+ databuf.appendChar(pool.put(attrName));
+ databuf.appendInt(0);
+ return databuf.length;
+ }
+
+ /** Fill in attribute length.
+ */
+ void endAttr(int index) {
+ putInt(databuf, index - 4, databuf.length - index);
+ }
+
+ /** Leave space for attribute count and return index for
+ * number of attributes field.
+ */
+ int beginAttrs() {
+ 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) {
+ 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++;
+ }
+ 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 ((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;
+ }
+
+
+ private void writeParamAnnotations(List<VarSymbol> params,
+ RetentionPolicy retention) {
+ for (VarSymbol s : params) {
+ ListBuffer<Attribute.Compound> buf = new ListBuffer<>();
+ for (Attribute.Compound a : s.getRawAttributes())
+ if (types.getRetention(a) == retention)
+ buf.append(a);
+ databuf.appendChar(buf.length());
+ for (Attribute.Compound a : buf)
+ writeCompoundAttribute(a);
+ }
+
+ }
+
+ private void writeParamAnnotations(MethodSymbol m,
+ RetentionPolicy retention) {
+ databuf.appendByte(m.params.length());
+ writeParamAnnotations(m.params, retention);
+ }
+
+ /** 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);
+ writeParamAnnotations(m, RetentionPolicy.RUNTIME);
+ endAttr(attrIndex);
+ attrCount++;
+ }
+ if (hasInvisible) {
+ int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);
+ writeParamAnnotations(m, RetentionPolicy.CLASS);
+ 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<>();
+ ListBuffer<Attribute.Compound> invisibles = new ListBuffer<>();
+ 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(types.erasure(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.getExceptionIndex());
+ 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 module attributes
+ **********************************************************************/
+
+ /** Write the Module attribute if needed.
+ * Returns the number of attributes written (0 or 1).
+ */
+ int writeModuleAttribute(ClassSymbol c) {
+ ModuleSymbol m = (ModuleSymbol) c.owner;
+
+ int alenIdx = writeAttr(names.Module);
+
+ databuf.appendChar(pool.put(m));
+ databuf.appendChar(ModuleFlags.value(m.flags)); // module_flags
+ databuf.appendChar(m.version != null ? pool.put(m.version) : 0);
+
+ ListBuffer<RequiresDirective> requires = new ListBuffer<>();
+ for (RequiresDirective r: m.requires) {
+ if (!r.flags.contains(RequiresFlag.EXTRA))
+ requires.add(r);
+ }
+ databuf.appendChar(requires.size());
+ for (RequiresDirective r: requires) {
+ databuf.appendChar(pool.put(r.module));
+ databuf.appendChar(RequiresFlag.value(r.flags));
+ databuf.appendChar(r.module.version != null ? pool.put(r.module.version) : 0);
+ }
+
+ List<ExportsDirective> exports = m.exports;
+ databuf.appendChar(exports.size());
+ for (ExportsDirective e: exports) {
+ databuf.appendChar(pool.put(e.packge));
+ databuf.appendChar(ExportsFlag.value(e.flags));
+ if (e.modules == null) {
+ databuf.appendChar(0);
+ } else {
+ databuf.appendChar(e.modules.size());
+ for (ModuleSymbol msym: e.modules) {
+ databuf.appendChar(pool.put(msym));
+ }
+ }
+ }
+
+ List<OpensDirective> opens = m.opens;
+ databuf.appendChar(opens.size());
+ for (OpensDirective o: opens) {
+ databuf.appendChar(pool.put(o.packge));
+ databuf.appendChar(OpensFlag.value(o.flags));
+ if (o.modules == null) {
+ databuf.appendChar(0);
+ } else {
+ databuf.appendChar(o.modules.size());
+ for (ModuleSymbol msym: o.modules) {
+ databuf.appendChar(pool.put(msym));
+ }
+ }
+ }
+
+ List<UsesDirective> uses = m.uses;
+ databuf.appendChar(uses.size());
+ for (UsesDirective s: uses) {
+ databuf.appendChar(pool.put(s.service));
+ }
+
+ // temporary fix to merge repeated provides clause for same service;
+ // eventually this should be disallowed when analyzing the module,
+ // so that each service type only appears once.
+ Map<ClassSymbol, Set<ClassSymbol>> mergedProvides = new LinkedHashMap<>();
+ for (ProvidesDirective p : m.provides) {
+ mergedProvides.computeIfAbsent(p.service, s -> new LinkedHashSet<>()).addAll(p.impls);
+ }
+ databuf.appendChar(mergedProvides.size());
+ mergedProvides.forEach((srvc, impls) -> {
+ databuf.appendChar(pool.put(srvc));
+ databuf.appendChar(impls.size());
+ impls.forEach(impl -> databuf.appendChar(pool.put(impl)));
+ });
+
+ endAttr(alenIdx);
+ return 1;
+ }
+
+/**********************************************************************
+ * 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<>();
+ innerClassesQueue = new ListBuffer<>();
+ 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
+ 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.BootstrapMethodsKey, DynamicMethod.BootstrapMethodsValue> entry : bootstrapMethods.entrySet()) {
+ DynamicMethod.BootstrapMethodsKey bsmKey = entry.getKey();
+ //write BSM handle
+ databuf.appendChar(pool.get(entry.getValue().mh));
+ Object[] uniqueArgs = bsmKey.getUniqueArgs();
+ //write static args length
+ databuf.appendChar(uniqueArgs.length);
+ //write static args array
+ 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 " + v.name);
+ pw.println("---" + flagNames(v.flags()));
+ }
+ databuf.appendChar(pool.put(v.name));
+ 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 " + m.name);
+ pw.println("---" + flagNames(m.flags()));
+ }
+ databuf.appendChar(pool.put(m.name));
+ 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)) {
+ if (!m.isLambdaMethod()) // Per JDK-8138729, do not emit parameters table for lambda bodies.
+ acount += writeMethodParametersAttr(m);
+ }
+ acount += writeMemberAttrs(m);
+ if (!m.isLambdaMethod())
+ 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 += 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 += 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 += 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 += 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 s) {
+ // process them in reverse sibling order;
+ // i.e., process them in declaration order.
+ List<VarSymbol> vars = List.nil();
+ for (Symbol sym : s.getSymbols(NON_RECURSIVE)) {
+ if (sym.kind == VAR) vars = vars.prepend((VarSymbol)sym);
+ }
+ while (vars.nonEmpty()) {
+ writeField(vars.head);
+ vars = vars.tail;
+ }
+ }
+
+ void writeMethods(Scope s) {
+ List<MethodSymbol> methods = List.nil();
+ for (Symbol sym : s.getSymbols(NON_RECURSIVE)) {
+ if (sym.kind == MTH && (sym.flags() & HYPOTHETICAL) == 0)
+ methods = methods.prepend((MethodSymbol)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
+ {
+ String name = (c.owner.kind == MDL ? c.name : c.flatname).toString();
+ Location outLocn;
+ if (multiModuleMode) {
+ ModuleSymbol msym = c.owner.kind == MDL ? (ModuleSymbol) c.owner : c.packge().modle;
+ outLocn = fileManager.getLocationForModule(CLASS_OUTPUT, msym.name.toString());
+ } else {
+ outLocn = CLASS_OUTPUT;
+ }
+ JavaFileObject outFile
+ = fileManager.getJavaFileForOutput(outLocn,
+ name,
+ 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<>();
+
+ Type supertype = types.supertype(c.type);
+ List<Type> interfaces = types.interfaces(c.type);
+ List<Type> typarams = c.type.getTypeArguments();
+
+ int flags;
+ if (c.owner.kind == MDL) {
+ flags = ACC_MODULE;
+ } else {
+ flags = adjustFlags(c.flags() & ~DEFAULT);
+ if ((flags & PROTECTED) != 0) flags |= PUBLIC;
+ flags = flags & ClassFlags & ~STRICTFP;
+ if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
+ }
+
+ if (dumpClassModifiers) {
+ PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
+ pw.println();
+ pw.println("CLASSFILE " + c.getQualifiedName());
+ pw.println("---" + flagNames(flags));
+ }
+ databuf.appendChar(flags);
+
+ if (c.owner.kind == MDL) {
+ PackageSymbol unnamed = ((ModuleSymbol) c.owner).unnamedPackage;
+ databuf.appendChar(pool.put(new ClassSymbol(0, names.module_info, unnamed)));
+ } else {
+ 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 (Symbol sym : c.members().getSymbols(NON_RECURSIVE)) {
+ switch (sym.kind) {
+ case VAR: fieldsCount++; break;
+ case MTH: if ((sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
+ break;
+ case TYP: enterInner((ClassSymbol)sym); break;
+ default : Assert.error();
+ }
+ }
+
+ if (c.trans_local != null) {
+ for (ClassSymbol local : c.trans_local) {
+ enterInner(local);
+ }
+ }
+
+ databuf.appendChar(fieldsCount);
+ writeFields(c.members());
+ databuf.appendChar(methodsCount);
+ writeMethods(c.members());
+
+ 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) {
+ 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 = PathFileObject.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);
+ if (c.owner.kind == MDL) {
+ acount += writeModuleAttribute(c);
+ acount += writeFlagAttrs(c.owner.flags() & ~DEPRECATED);
+ }
+ acount += writeExtraClassAttributes(c);
+
+ poolbuf.appendInt(JAVA_MAGIC);
+
+ if (c.owner.kind == MDL) {
+ // temporarily overide to force use of v53 for module-info.class
+ poolbuf.appendChar(0);
+ poolbuf.appendChar(53);
+ } else {
+ 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 & BRIDGE) != 0)
+ result |= ACC_BRIDGE;
+ if ((flags & VARARGS) != 0)
+ 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;
+ }
+}