JDK 11 jdk.compiler.jmod - Compiler Tool
JDK 11 jdk.compiler.jmod is the JMOD file for JDK 11 Compiler tool,
which can be invoked by the "javac" command.
JDK 11 Compiler tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.compiler.jmod.
JDK 11 Compiler tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 Compiler source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.compiler.
You can click and view the content of each source code file in the list below.
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⏎ com/sun/tools/javac/jvm/ClassWriter.java
/*
* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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*/
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 java.util.stream.Collectors;
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.SignatureGenerator.InvalidSignatureException;
import com.sun.tools.javac.code.Types.UniqueType;
import com.sun.tools.javac.comp.Check;
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.resources.CompilerProperties.Errors;
import com.sun.tools.javac.resources.CompilerProperties.Fragments;
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;
/** Preview language level.
*/
private Preview preview;
/**
* Target class version.
*/
private Target target;
/**
* Source language version.
*/
private Source source;
/** Type utilities. */
private Types types;
private Check check;
/**
* 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);
preview = Preview.instance(context);
target = Target.instance(context);
source = Source.instance(context);
types = Types.instance(context);
check = Check.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 NestMembers attribute (if needed)
*/
int writeNestMembersIfNeeded(ClassSymbol csym) {
ListBuffer<Symbol> nested = new ListBuffer<>();
listNested(csym, nested);
Set<Symbol> nestedUnique = new LinkedHashSet<>(nested);
if (csym.owner.kind == PCK && !nestedUnique.isEmpty()) {
int alenIdx = writeAttr(names.NestMembers);
databuf.appendChar(nestedUnique.size());
for (Symbol s : nestedUnique) {
databuf.appendChar(pool.put(s));
}
endAttr(alenIdx);
return 1;
}
return 0;
}
/**
* Write NestHost attribute (if needed)
*/
int writeNestHostIfNeeded(ClassSymbol csym) {
if (csym.owner.kind != PCK) {
int alenIdx = writeAttr(names.NestHost);
databuf.appendChar(pool.put(csym.outermostClass()));
endAttr(alenIdx);
return 1;
}
return 0;
}
private void listNested(Symbol sym, ListBuffer<Symbol> seen) {
if (sym.kind != TYP) return;
ClassSymbol csym = (ClassSymbol)sym;
if (csym.owner.kind != PCK) {
seen.add(csym);
}
if (csym.members() != null) {
for (Symbol s : sym.members().getSymbols()) {
listNested(s, seen);
}
}
if (csym.trans_local != null) {
for (Symbol s : csym.trans_local) {
listNested(s, seen);
}
}
}
/** 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) && target.hasMethodParameters()) {
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 non-denotable type (non-denotable
// types are not supported in signature attribute grammar!)
return !types.isSameType(t, types.erasure(t)) &&
check.checkDenotable(t);
}
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.getName());
out.close();
out = null;
} catch (InvalidSignatureException ex) {
log.error(Errors.CannotGenerateClass(c, Fragments.IllegalSignature(c, ex.type())));
} 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 (preview.isEnabled()) {
poolbuf.appendChar(ClassFile.PREVIEW_MINOR_VERSION);
} else {
poolbuf.appendChar(target.minorVersion);
}
poolbuf.appendChar(target.majorVersion);
if (c.owner.kind != MDL) {
if (target.hasNestmateAccess()) {
acount += writeNestMembersIfNeeded(c);
acount += writeNestHostIfNeeded(c);
}
}
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;
}
}
⏎ com/sun/tools/javac/jvm/ClassWriter.java
Or download all of them as a single archive file:
File name: jdk.compiler-11.0.1-src.zip File size: 1347269 bytes Release date: 2018-11-04 Download
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