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dragonwell8_jdk
提交 6f00077f 编写于 作者: M mhaupt
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8081512: Remove sun.invoke.anon classes, or move / co-locate them with tests 

Reviewed-by: mchung, sundar
上级 5e449602
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src/share/classes/sun/invoke/anon/AnonymousClassLoader.java 已删除 100644 → 0
浏览文件 @ 5e449602
/*
* Copyright (c) 2008, 2012, 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 sun.invoke.anon;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import sun.misc.IOUtils;
/**
* Anonymous class loader. Will load any valid classfile, producing
* a {@link Class} metaobject, without installing that class in the
* system dictionary. Therefore, {@link Class#forName(String)} will never
* produce a reference to an anonymous class.
* <p>
* The access permissions of the anonymous class are borrowed from
* a <em>host class</em>. The new class behaves as if it were an
* inner class of the host class. It can access the host's private
* members, if the creator of the class loader has permission to
* do so (or to create accessible reflective objects).
* <p>
* When the anonymous class is loaded, elements of its constant pool
* can be patched to new values. This provides a hook to pre-resolve
* named classes in the constant pool to other classes, including
* anonymous ones. Also, string constants can be pre-resolved to
* any reference. (The verifier treats non-string, non-class reference
* constants as plain objects.)
* <p>
* Why include the patching function? It makes some use cases much easier.
* Second, the constant pool needed some internal patching anyway,
* to anonymize the loaded class itself. Finally, if you are going
* to use this seriously, you'll want to build anonymous classes
* on top of pre-existing anonymous classes, and that requires patching.
*
* <p>%%% TO-DO:
* <ul>
* <li>needs better documentation</li>
* <li>needs more security work (for safe delegation)</li>
* <li>needs a clearer story about error processing</li>
* <li>patch member references also (use ';' as delimiter char)</li>
* <li>patch method references to (conforming) method handles</li>
* </ul>
*
* @author jrose
* @author Remi Forax
* @see <a href="http://blogs.sun.com/jrose/entry/anonymous_classes_in_the_vm">
* http://blogs.sun.com/jrose/entry/anonymous_classes_in_the_vm</a>
*/
public class AnonymousClassLoader {
final Class<?> hostClass;
// Privileged constructor.
private AnonymousClassLoader(Class<?> hostClass) {
this.hostClass = hostClass;
}
public static AnonymousClassLoader make(sun.misc.Unsafe unsafe, Class<?> hostClass) {
if (unsafe == null) throw new NullPointerException();
return new AnonymousClassLoader(hostClass);
}
public Class<?> loadClass(byte[] classFile) {
if (defineAnonymousClass == null) {
// no JVM support; try to fake an approximation
try {
return fakeLoadClass(new ConstantPoolParser(classFile).createPatch());
} catch (InvalidConstantPoolFormatException ee) {
throw new IllegalArgumentException(ee);
}
}
return loadClass(classFile, null);
}
public Class<?> loadClass(ConstantPoolPatch classPatch) {
if (defineAnonymousClass == null) {
// no JVM support; try to fake an approximation
return fakeLoadClass(classPatch);
}
Object[] patches = classPatch.patchArray;
// Convert class names (this late in the game)
// to use slash '/' instead of dot '.'.
// Java likes dots, but the JVM likes slashes.
for (int i = 0; i < patches.length; i++) {
Object value = patches[i];
if (value != null) {
byte tag = classPatch.getTag(i);
switch (tag) {
case ConstantPoolVisitor.CONSTANT_Class:
if (value instanceof String) {
if (patches == classPatch.patchArray)
patches = patches.clone();
patches[i] = ((String)value).replace('.', '/');
}
break;
case ConstantPoolVisitor.CONSTANT_Fieldref:
case ConstantPoolVisitor.CONSTANT_Methodref:
case ConstantPoolVisitor.CONSTANT_InterfaceMethodref:
case ConstantPoolVisitor.CONSTANT_NameAndType:
// When/if the JVM supports these patches,
// we'll probably need to reformat them also.
// Meanwhile, let the class loader create the error.
break;
}
}
}
return loadClass(classPatch.outer.classFile, classPatch.patchArray);
}
private Class<?> loadClass(byte[] classFile, Object[] patchArray) {
try {
return (Class<?>)
defineAnonymousClass.invoke(unsafe,
hostClass, classFile, patchArray);
} catch (Exception ex) {
throwReflectedException(ex);
throw new RuntimeException("error loading into "+hostClass, ex);
}
}
private static void throwReflectedException(Exception ex) {
if (ex instanceof InvocationTargetException) {
Throwable tex = ((InvocationTargetException)ex).getTargetException();
if (tex instanceof Error)
throw (Error) tex;
ex = (Exception) tex;
}
if (ex instanceof RuntimeException) {
throw (RuntimeException) ex;
}
}
private Class<?> fakeLoadClass(ConstantPoolPatch classPatch) {
// Implementation:
// 1. Make up a new name nobody has used yet.
// 2. Inspect the tail-header of the class to find the this_class index.
// 3. Patch the CONSTANT_Class for this_class to the new name.
// 4. Add other CP entries required by (e.g.) string patches.
// 5. Flatten Class constants down to their names, making sure that
// the host class loader can pick them up again accurately.
// 6. Generate the edited class file bytes.
//
// Potential limitations:
// * The class won't be truly anonymous, and may interfere with others.
// * Flattened class constants might not work, because of loader issues.
// * Pseudo-string constants will not flatten down to real strings.
// * Method handles will (of course) fail to flatten to linkage strings.
if (true) throw new UnsupportedOperationException("NYI");
Object[] cpArray;
try {
cpArray = classPatch.getOriginalCP();
} catch (InvalidConstantPoolFormatException ex) {
throw new RuntimeException(ex);
}
int thisClassIndex = classPatch.getParser().getThisClassIndex();
String thisClassName = (String) cpArray[thisClassIndex];
synchronized (AnonymousClassLoader.class) {
thisClassName = thisClassName+"\\|"+(++fakeNameCounter);
}
classPatch.putUTF8(thisClassIndex, thisClassName);
byte[] classFile = null;
return unsafe.defineClass(null, classFile, 0, classFile.length,
hostClass.getClassLoader(),
hostClass.getProtectionDomain());
}
private static int fakeNameCounter = 99999;
// ignore two warnings on this line:
private static sun.misc.Unsafe unsafe = sun.misc.Unsafe.getUnsafe();
// preceding line requires that this class be on the boot class path
static private final Method defineAnonymousClass;
static {
Method dac = null;
Class<? extends sun.misc.Unsafe> unsafeClass = unsafe.getClass();
try {
dac = unsafeClass.getMethod("defineAnonymousClass",
Class.class,
byte[].class,
Object[].class);
} catch (Exception ee) {
dac = null;
}
defineAnonymousClass = dac;
}
private static void noJVMSupport() {
throw new UnsupportedOperationException("no JVM support for anonymous classes");
}
private static native Class<?> loadClassInternal(Class<?> hostClass,
byte[] classFile,
Object[] patchArray);
public static byte[] readClassFile(Class<?> templateClass) throws IOException {
String templateName = templateClass.getName();
int lastDot = templateName.lastIndexOf('.');
java.net.URL url = templateClass.getResource(templateName.substring(lastDot+1)+".class");
java.net.URLConnection connection = url.openConnection();
int contentLength = connection.getContentLength();
if (contentLength < 0)
throw new IOException("invalid content length "+contentLength);
return IOUtils.readFully(connection.getInputStream(), contentLength, true);
}
}
src/share/classes/sun/invoke/anon/ConstantPoolParser.java 已删除 100644 → 0
浏览文件 @ 5e449602
/*
* Copyright (c) 2008, 2011, 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 sun.invoke.anon;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import static sun.invoke.anon.ConstantPoolVisitor.*;
/** A constant pool parser.
*/
public class ConstantPoolParser {
final byte[] classFile;
final byte[] tags;
final char[] firstHeader; // maghi, maglo, minor, major, cplen
// these are filled in on first parse:
int endOffset;
char[] secondHeader; // flags, this_class, super_class, intlen
// used to decode UTF8 array
private char[] charArray = new char[80];
/** Creates a constant pool parser.
* @param classFile an array of bytes containing a class.
* @throws InvalidConstantPoolFormatException if the header of the class has errors.
*/
public ConstantPoolParser(byte[] classFile) throws InvalidConstantPoolFormatException {
this.classFile = classFile;
this.firstHeader = parseHeader(classFile);
this.tags = new byte[firstHeader[4]];
}
/** Create a constant pool parser by loading the bytecodes of the
* class taken as argument.
*
* @param templateClass the class to parse.
*
* @throws IOException raised if an I/O occurs when loading
* the bytecode of the template class.
* @throws InvalidConstantPoolFormatException if the header of the class has errors.
*
* @see #ConstantPoolParser(byte[])
* @see AnonymousClassLoader#readClassFile(Class)
*/
public ConstantPoolParser(Class<?> templateClass) throws IOException, InvalidConstantPoolFormatException {
this(AnonymousClassLoader.readClassFile(templateClass));
}
/** Creates an empty patch to patch the class file
* used by the current parser.
* @return a new class patch.
*/
public ConstantPoolPatch createPatch() {
return new ConstantPoolPatch(this);
}
/** Report the tag of the indicated CP entry.
* @param index
* @return one of {@link ConstantPoolVisitor#CONSTANT_Utf8}, etc.
*/
public byte getTag(int index) {
getEndOffset(); // trigger an exception if we haven't parsed yet
return tags[index];
}
/** Report the length of the constant pool. */
public int getLength() {
return firstHeader[4];
}
/** Report the offset, within the class file, of the start of the constant pool. */
public int getStartOffset() {
return firstHeader.length * 2;
}
/** Report the offset, within the class file, of the end of the constant pool. */
public int getEndOffset() {
if (endOffset == 0)
throw new IllegalStateException("class file has not yet been parsed");
return endOffset;
}
/** Report the CP index of this class's own name. */
public int getThisClassIndex() {
getEndOffset(); // provoke exception if not yet parsed
return secondHeader[1];
}
/** Report the total size of the class file. */
public int getTailLength() {
return classFile.length - getEndOffset();
}
/** Write the head (header plus constant pool)
* of the class file to the indicated stream.
*/
public void writeHead(OutputStream out) throws IOException {
out.write(classFile, 0, getEndOffset());
}
/** Write the head (header plus constant pool)
* of the class file to the indicated stream,
* incorporating the non-null entries of the given array
* as patches.
*/
void writePatchedHead(OutputStream out, Object[] patchArray) {
// this will be useful to partially emulate the class loader on old JVMs
throw new UnsupportedOperationException("Not yet implemented");
}
/** Write the tail (everything after the constant pool)
* of the class file to the indicated stream.
*/
public void writeTail(OutputStream out) throws IOException {
out.write(classFile, getEndOffset(), getTailLength());
}
private static char[] parseHeader(byte[] classFile) throws InvalidConstantPoolFormatException {
char[] result = new char[5];
ByteBuffer buffer = ByteBuffer.wrap(classFile);
for (int i = 0; i < result.length; i++)
result[i] = (char) getUnsignedShort(buffer);
int magic = result[0] << 16 | result[1] << 0;
if (magic != 0xCAFEBABE)
throw new InvalidConstantPoolFormatException("invalid magic number "+magic);
// skip major, minor version
int len = result[4];
if (len < 1)
throw new InvalidConstantPoolFormatException("constant pool length < 1");
return result;
}
/** Parse the constant pool of the class
* calling a method visit* each time a constant pool entry is parsed.
*
* The order of the calls to visit* is not guaranteed to be the same
* than the order of the constant pool entry in the bytecode array.
*
* @param visitor
* @throws InvalidConstantPoolFormatException
*/
public void parse(ConstantPoolVisitor visitor) throws InvalidConstantPoolFormatException {
ByteBuffer buffer = ByteBuffer.wrap(classFile);
buffer.position(getStartOffset()); //skip header
Object[] values = new Object[getLength()];
try {
parseConstantPool(buffer, values, visitor);
} catch(BufferUnderflowException e) {
throw new InvalidConstantPoolFormatException(e);
}
if (endOffset == 0) {
endOffset = buffer.position();
secondHeader = new char[4];
for (int i = 0; i < secondHeader.length; i++) {
secondHeader[i] = (char) getUnsignedShort(buffer);
}
}
resolveConstantPool(values, visitor);
}
private char[] getCharArray(int utfLength) {
if (utfLength <= charArray.length)
return charArray;
return charArray = new char[utfLength];
}
private void parseConstantPool(ByteBuffer buffer, Object[] values, ConstantPoolVisitor visitor) throws InvalidConstantPoolFormatException {
for (int i = 1; i < tags.length; ) {
byte tag = (byte) getUnsignedByte(buffer);
assert(tags[i] == 0 || tags[i] == tag);
tags[i] = tag;
switch (tag) {
case CONSTANT_Utf8:
int utfLen = getUnsignedShort(buffer);
String value = getUTF8(buffer, utfLen, getCharArray(utfLen));
visitor.visitUTF8(i, CONSTANT_Utf8, value);
tags[i] = tag;
values[i++] = value;
break;
case CONSTANT_Integer:
visitor.visitConstantValue(i, tag, buffer.getInt());
i++;
break;
case CONSTANT_Float:
visitor.visitConstantValue(i, tag, buffer.getFloat());
i++;
break;
case CONSTANT_Long:
visitor.visitConstantValue(i, tag, buffer.getLong());
i+=2;
break;
case CONSTANT_Double:
visitor.visitConstantValue(i, tag, buffer.getDouble());
i+=2;
break;
case CONSTANT_Class: // fall through:
case CONSTANT_String:
tags[i] = tag;
values[i++] = new int[] { getUnsignedShort(buffer) };
break;
case CONSTANT_Fieldref: // fall through:
case CONSTANT_Methodref: // fall through:
case CONSTANT_InterfaceMethodref: // fall through:
case CONSTANT_NameAndType:
tags[i] = tag;
values[i++] = new int[] { getUnsignedShort(buffer), getUnsignedShort(buffer) };
break;
default:
throw new AssertionError("invalid constant "+tag);
}
}
}
private void resolveConstantPool(Object[] values, ConstantPoolVisitor visitor) {
// clean out the int[] values, which are temporary
for (int beg = 1, end = values.length-1, beg2, end2;
beg <= end;
beg = beg2, end = end2) {
beg2 = end; end2 = beg-1;
//System.out.println("CP resolve pass: "+beg+".."+end);
for (int i = beg; i <= end; i++) {
Object value = values[i];
if (!(value instanceof int[]))
continue;
int[] array = (int[]) value;
byte tag = tags[i];
switch (tag) {
case CONSTANT_String:
String stringBody = (String) values[array[0]];
visitor.visitConstantString(i, tag, stringBody, array[0]);
values[i] = null;
break;
case CONSTANT_Class: {
String className = (String) values[array[0]];
// use the external form favored by Class.forName:
className = className.replace('/', '.');
visitor.visitConstantString(i, tag, className, array[0]);
values[i] = className;
break;
}
case CONSTANT_NameAndType: {
String memberName = (String) values[array[0]];
String signature = (String) values[array[1]];
visitor.visitDescriptor(i, tag, memberName, signature,
array[0], array[1]);
values[i] = new String[] {memberName, signature};
break;
}
case CONSTANT_Fieldref: // fall through:
case CONSTANT_Methodref: // fall through:
case CONSTANT_InterfaceMethodref: {
Object className = values[array[0]];
Object nameAndType = values[array[1]];
if (!(className instanceof String) ||
!(nameAndType instanceof String[])) {
// one more pass is needed
if (beg2 > i) beg2 = i;
if (end2 < i) end2 = i;
continue;
}
String[] nameAndTypeArray = (String[]) nameAndType;
visitor.visitMemberRef(i, tag,
(String)className,
nameAndTypeArray[0],
nameAndTypeArray[1],
array[0], array[1]);
values[i] = null;
}
break;
default:
continue;
}
}
}
}
private static int getUnsignedByte(ByteBuffer buffer) {
return buffer.get() & 0xFF;
}
private static int getUnsignedShort(ByteBuffer buffer) {
int b1 = getUnsignedByte(buffer);
int b2 = getUnsignedByte(buffer);
return (b1 << 8) + (b2 << 0);
}
private static String getUTF8(ByteBuffer buffer, int utfLen, char[] charArray) throws InvalidConstantPoolFormatException {
int utfLimit = buffer.position() + utfLen;
int index = 0;
while (buffer.position() < utfLimit) {
int c = buffer.get() & 0xff;
if (c > 127) {
buffer.position(buffer.position() - 1);
return getUTF8Extended(buffer, utfLimit, charArray, index);
}
charArray[index++] = (char)c;
}
return new String(charArray, 0, index);
}
private static String getUTF8Extended(ByteBuffer buffer, int utfLimit, char[] charArray, int index) throws InvalidConstantPoolFormatException {
int c, c2, c3;
while (buffer.position() < utfLimit) {
c = buffer.get() & 0xff;
switch (c >> 4) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
/* 0xxxxxxx*/
charArray[index++] = (char)c;
break;
case 12: case 13:
/* 110x xxxx 10xx xxxx*/
c2 = buffer.get();
if ((c2 & 0xC0) != 0x80)
throw new InvalidConstantPoolFormatException(
"malformed input around byte " + buffer.position());
charArray[index++] = (char)(((c & 0x1F) << 6) |
(c2 & 0x3F));
break;
case 14:
/* 1110 xxxx 10xx xxxx 10xx xxxx */
c2 = buffer.get();
c3 = buffer.get();
if (((c2 & 0xC0) != 0x80) || ((c3 & 0xC0) != 0x80))
throw new InvalidConstantPoolFormatException(
"malformed input around byte " + (buffer.position()));
charArray[index++] = (char)(((c & 0x0F) << 12) |
((c2 & 0x3F) << 6) |
((c3 & 0x3F) << 0));
break;
default:
/* 10xx xxxx, 1111 xxxx */
throw new InvalidConstantPoolFormatException(
"malformed input around byte " + buffer.position());
}
}
// The number of chars produced may be less than utflen
return new String(charArray, 0, index);
}
}
src/share/classes/sun/invoke/anon/ConstantPoolPatch.java 已删除 100644 → 0
浏览文件 @ 5e449602
/*
* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.invoke.anon;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.Map;
import static sun.invoke.anon.ConstantPoolVisitor.*;
/** A class and its patched constant pool.
*
* This class allow to modify (patch) a constant pool
* by changing the value of its entry.
* Entry are referenced using index that can be get
* by parsing the constant pool using
* {@link ConstantPoolParser#parse(ConstantPoolVisitor)}.
*
* @see ConstantPoolVisitor
* @see ConstantPoolParser#createPatch()
*/
public class ConstantPoolPatch {
final ConstantPoolParser outer;
final Object[] patchArray;
ConstantPoolPatch(ConstantPoolParser outer) {
this.outer = outer;
this.patchArray = new Object[outer.getLength()];
}
/** Create a {@link ConstantPoolParser} and
* a {@link ConstantPoolPatch} in one step.
* Equivalent to {@code new ConstantPoolParser(classFile).createPatch()}.
*
* @param classFile an array of bytes containing a class.
* @see #ConstantPoolParser(Class)
*/
public ConstantPoolPatch(byte[] classFile) throws InvalidConstantPoolFormatException {
this(new ConstantPoolParser(classFile));
}
/** Create a {@link ConstantPoolParser} and
* a {@link ConstantPoolPatch} in one step.
* Equivalent to {@code new ConstantPoolParser(templateClass).createPatch()}.
*
* @param templateClass the class to parse.
* @see #ConstantPoolParser(Class)
*/
public ConstantPoolPatch(Class<?> templateClass) throws IOException, InvalidConstantPoolFormatException {
this(new ConstantPoolParser(templateClass));
}
/** Creates a patch from an existing patch.
* All changes are copied from that patch.
* @param patch a patch
*
* @see ConstantPoolParser#createPatch()
*/
public ConstantPoolPatch(ConstantPoolPatch patch) {
outer = patch.outer;
patchArray = patch.patchArray.clone();
}
/** Which parser built this patch? */
public ConstantPoolParser getParser() {
return outer;
}
/** Report the tag at the given index in the constant pool. */
public byte getTag(int index) {
return outer.getTag(index);
}
/** Report the current patch at the given index of the constant pool.
* Null means no patch will be made.
* To observe the unpatched entry at the given index, use
* {@link #getParser()}{@code .}@link ConstantPoolParser#parse(ConstantPoolVisitor)}
*/
public Object getPatch(int index) {
Object value = patchArray[index];
if (value == null) return null;
switch (getTag(index)) {
case CONSTANT_Fieldref:
case CONSTANT_Methodref:
case CONSTANT_InterfaceMethodref:
if (value instanceof String)
value = stripSemis(2, (String) value);
break;
case CONSTANT_NameAndType:
if (value instanceof String)
value = stripSemis(1, (String) value);
break;
}
return value;
}
/** Clear all patches. */
public void clear() {
Arrays.fill(patchArray, null);
}
/** Clear one patch. */
public void clear(int index) {
patchArray[index] = null;
}
/** Produce the patches as an array. */
public Object[] getPatches() {
return patchArray.clone();
}
/** Produce the original constant pool as an array. */
public Object[] getOriginalCP() throws InvalidConstantPoolFormatException {
return getOriginalCP(0, patchArray.length, -1);
}
/** Walk the constant pool, applying patches using the given map.
*
* @param utf8Map Utf8 strings to modify, if encountered
* @param classMap Classes (or their names) to modify, if encountered
* @param valueMap Constant values to modify, if encountered
* @param deleteUsedEntries if true, delete map entries that are used
*/
public void putPatches(final Map<String,String> utf8Map,
final Map<String,Object> classMap,
final Map<Object,Object> valueMap,
boolean deleteUsedEntries) throws InvalidConstantPoolFormatException {
final HashSet<String> usedUtf8Keys;
final HashSet<String> usedClassKeys;
final HashSet<Object> usedValueKeys;
if (deleteUsedEntries) {
usedUtf8Keys = (utf8Map == null) ? null : new HashSet<String>();
usedClassKeys = (classMap == null) ? null : new HashSet<String>();
usedValueKeys = (valueMap == null) ? null : new HashSet<Object>();
} else {
usedUtf8Keys = null;
usedClassKeys = null;
usedValueKeys = null;
}
outer.parse(new ConstantPoolVisitor() {
@Override
public void visitUTF8(int index, byte tag, String utf8) {
putUTF8(index, utf8Map.get(utf8));
if (usedUtf8Keys != null) usedUtf8Keys.add(utf8);
}
@Override
public void visitConstantValue(int index, byte tag, Object value) {
putConstantValue(index, tag, valueMap.get(value));
if (usedValueKeys != null) usedValueKeys.add(value);
}
@Override
public void visitConstantString(int index, byte tag, String name, int nameIndex) {
if (tag == CONSTANT_Class) {
putConstantValue(index, tag, classMap.get(name));
if (usedClassKeys != null) usedClassKeys.add(name);
} else {
assert(tag == CONSTANT_String);
visitConstantValue(index, tag, name);
}
}
});
if (usedUtf8Keys != null) utf8Map.keySet().removeAll(usedUtf8Keys);
if (usedClassKeys != null) classMap.keySet().removeAll(usedClassKeys);
if (usedValueKeys != null) valueMap.keySet().removeAll(usedValueKeys);
}
Object[] getOriginalCP(final int startIndex,
final int endIndex,
final int tagMask) throws InvalidConstantPoolFormatException {
final Object[] cpArray = new Object[endIndex - startIndex];
outer.parse(new ConstantPoolVisitor() {
void show(int index, byte tag, Object value) {
if (index < startIndex || index >= endIndex) return;
if (((1 << tag) & tagMask) == 0) return;
cpArray[index - startIndex] = value;
}
@Override
public void visitUTF8(int index, byte tag, String utf8) {
show(index, tag, utf8);
}
@Override
public void visitConstantValue(int index, byte tag, Object value) {
assert(tag != CONSTANT_String);
show(index, tag, value);
}
@Override
public void visitConstantString(int index, byte tag,
String value, int j) {
show(index, tag, value);
}
@Override
public void visitMemberRef(int index, byte tag,
String className, String memberName,
String signature,
int j, int k) {
show(index, tag, new String[]{ className, memberName, signature });
}
@Override
public void visitDescriptor(int index, byte tag,
String memberName, String signature,
int j, int k) {
show(index, tag, new String[]{ memberName, signature });
}
});
return cpArray;
}
/** Write the head (header plus constant pool)
* of the patched class file to the indicated stream.
*/
void writeHead(OutputStream out) throws IOException {
outer.writePatchedHead(out, patchArray);
}
/** Write the tail (everything after the constant pool)
* of the patched class file to the indicated stream.
*/
void writeTail(OutputStream out) throws IOException {
outer.writeTail(out);
}
private void checkConstantTag(byte tag, Object value) {
if (value == null)
throw new IllegalArgumentException(
"invalid null constant value");
if (classForTag(tag) != value.getClass())
throw new IllegalArgumentException(
"invalid constant value"
+ (tag == CONSTANT_None ? ""
: " for tag "+tagName(tag))
+ " of class "+value.getClass());
}
private void checkTag(int index, byte putTag) {
byte tag = outer.tags[index];
if (tag != putTag)
throw new IllegalArgumentException(
"invalid put operation"
+ " for " + tagName(putTag)
+ " at index " + index + " found " + tagName(tag));
}
private void checkTagMask(int index, int tagBitMask) {
byte tag = outer.tags[index];
int tagBit = ((tag & 0x1F) == tag) ? (1 << tag) : 0;
if ((tagBit & tagBitMask) == 0)
throw new IllegalArgumentException(
"invalid put operation"
+ " at index " + index + " found " + tagName(tag));
}
private static void checkMemberName(String memberName) {
if (memberName.indexOf(';') >= 0)
throw new IllegalArgumentException("memberName " + memberName + " contains a ';'");
}
/** Set the entry of the constant pool indexed by index to
* a new string.
*
* @param index an index to a constant pool entry containing a
* {@link ConstantPoolVisitor#CONSTANT_Utf8} value.
* @param utf8 a string
*
* @see ConstantPoolVisitor#visitUTF8(int, byte, String)
*/
public void putUTF8(int index, String utf8) {
if (utf8 == null) { clear(index); return; }
checkTag(index, CONSTANT_Utf8);
patchArray[index] = utf8;
}
/** Set the entry of the constant pool indexed by index to
* a new value, depending on its dynamic type.
*
* @param index an index to a constant pool entry containing a
* one of the following structures:
* {@link ConstantPoolVisitor#CONSTANT_Integer},
* {@link ConstantPoolVisitor#CONSTANT_Float},
* {@link ConstantPoolVisitor#CONSTANT_Long},
* {@link ConstantPoolVisitor#CONSTANT_Double},
* {@link ConstantPoolVisitor#CONSTANT_String}, or
* {@link ConstantPoolVisitor#CONSTANT_Class}
* @param value a boxed int, float, long or double; or a string or class object
* @throws IllegalArgumentException if the type of the constant does not
* match the constant pool entry type,
* as reported by {@link #getTag(int)}
*
* @see #putConstantValue(int, byte, Object)
* @see ConstantPoolVisitor#visitConstantValue(int, byte, Object)
* @see ConstantPoolVisitor#visitConstantString(int, byte, String, int)
*/
public void putConstantValue(int index, Object value) {
if (value == null) { clear(index); return; }
byte tag = tagForConstant(value.getClass());
checkConstantTag(tag, value);
checkTag(index, tag);
patchArray[index] = value;
}
/** Set the entry of the constant pool indexed by index to
* a new value.
*
* @param index an index to a constant pool entry matching the given tag
* @param tag one of the following values:
* {@link ConstantPoolVisitor#CONSTANT_Integer},
* {@link ConstantPoolVisitor#CONSTANT_Float},
* {@link ConstantPoolVisitor#CONSTANT_Long},
* {@link ConstantPoolVisitor#CONSTANT_Double},
* {@link ConstantPoolVisitor#CONSTANT_String}, or
* {@link ConstantPoolVisitor#CONSTANT_Class}
* @param value a boxed number, string, or class object
* @throws IllegalArgumentException if the type of the constant does not
* match the constant pool entry type, or if a class name contains
* '/' or ';'
*
* @see #putConstantValue(int, Object)
* @see ConstantPoolVisitor#visitConstantValue(int, byte, Object)
* @see ConstantPoolVisitor#visitConstantString(int, byte, String, int)
*/
public void putConstantValue(int index, byte tag, Object value) {
if (value == null) { clear(index); return; }
checkTag(index, tag);
if (tag == CONSTANT_Class && value instanceof String) {
checkClassName((String) value);
} else if (tag == CONSTANT_String) {
// the JVM accepts any object as a patch for a string
} else {
// make sure the incoming value is the right type
checkConstantTag(tag, value);
}
checkTag(index, tag);
patchArray[index] = value;
}
/** Set the entry of the constant pool indexed by index to
* a new {@link ConstantPoolVisitor#CONSTANT_NameAndType} value.
*
* @param index an index to a constant pool entry containing a
* {@link ConstantPoolVisitor#CONSTANT_NameAndType} value.
* @param memberName a memberName
* @param signature a signature
* @throws IllegalArgumentException if memberName contains the character ';'
*
* @see ConstantPoolVisitor#visitDescriptor(int, byte, String, String, int, int)
*/
public void putDescriptor(int index, String memberName, String signature) {
checkTag(index, CONSTANT_NameAndType);
checkMemberName(memberName);
patchArray[index] = addSemis(memberName, signature);
}
/** Set the entry of the constant pool indexed by index to
* a new {@link ConstantPoolVisitor#CONSTANT_Fieldref},
* {@link ConstantPoolVisitor#CONSTANT_Methodref}, or
* {@link ConstantPoolVisitor#CONSTANT_InterfaceMethodref} value.
*
* @param index an index to a constant pool entry containing a member reference
* @param className a class name
* @param memberName a field or method name
* @param signature a field or method signature
* @throws IllegalArgumentException if memberName contains the character ';'
* or signature is not a correct signature
*
* @see ConstantPoolVisitor#visitMemberRef(int, byte, String, String, String, int, int)
*/
public void putMemberRef(int index, byte tag,
String className, String memberName, String signature) {
checkTagMask(tag, CONSTANT_MemberRef_MASK);
checkTag(index, tag);
checkClassName(className);
checkMemberName(memberName);
if (signature.startsWith("(") == (tag == CONSTANT_Fieldref))
throw new IllegalArgumentException("bad signature: "+signature);
patchArray[index] = addSemis(className, memberName, signature);
}
static private final int CONSTANT_MemberRef_MASK =
CONSTANT_Fieldref
| CONSTANT_Methodref
| CONSTANT_InterfaceMethodref;
private static final Map<Class<?>, Byte> CONSTANT_VALUE_CLASS_TAG
= new IdentityHashMap<Class<?>, Byte>();
private static final Class<?>[] CONSTANT_VALUE_CLASS = new Class<?>[16];
static {
Object[][] values = {
{Integer.class, CONSTANT_Integer},
{Long.class, CONSTANT_Long},
{Float.class, CONSTANT_Float},
{Double.class, CONSTANT_Double},
{String.class, CONSTANT_String},
{Class.class, CONSTANT_Class}
};
for (Object[] value : values) {
Class<?> cls = (Class<?>)value[0];
Byte tag = (Byte) value[1];
CONSTANT_VALUE_CLASS_TAG.put(cls, tag);
CONSTANT_VALUE_CLASS[(byte)tag] = cls;
}
}
static Class<?> classForTag(byte tag) {
if ((tag & 0xFF) >= CONSTANT_VALUE_CLASS.length)
return null;
return CONSTANT_VALUE_CLASS[tag];
}
static byte tagForConstant(Class<?> cls) {
Byte tag = CONSTANT_VALUE_CLASS_TAG.get(cls);
return (tag == null) ? CONSTANT_None : (byte)tag;
}
private static void checkClassName(String className) {
if (className.indexOf('/') >= 0 || className.indexOf(';') >= 0)
throw new IllegalArgumentException("invalid class name " + className);
}
static String addSemis(String name, String... names) {
StringBuilder buf = new StringBuilder(name.length() * 5);
buf.append(name);
for (String name2 : names) {
buf.append(';').append(name2);
}
String res = buf.toString();
assert(stripSemis(names.length, res)[0].equals(name));
assert(stripSemis(names.length, res)[1].equals(names[0]));
assert(names.length == 1 ||
stripSemis(names.length, res)[2].equals(names[1]));
return res;
}
static String[] stripSemis(int count, String string) {
String[] res = new String[count+1];
int pos = 0;
for (int i = 0; i < count; i++) {
int pos2 = string.indexOf(';', pos);
if (pos2 < 0) pos2 = string.length(); // yuck
res[i] = string.substring(pos, pos2);
pos = pos2;
}
res[count] = string.substring(pos);
return res;
}
public String toString() {
StringBuilder buf = new StringBuilder(this.getClass().getName());
buf.append("{");
Object[] origCP = null;
for (int i = 0; i < patchArray.length; i++) {
if (patchArray[i] == null) continue;
if (origCP != null) {
buf.append(", ");
} else {
try {
origCP = getOriginalCP();
} catch (InvalidConstantPoolFormatException ee) {
origCP = new Object[0];
}
}
Object orig = (i < origCP.length) ? origCP[i] : "?";
buf.append(orig).append("=").append(patchArray[i]);
}
buf.append("}");
return buf.toString();
}
}
src/share/classes/sun/invoke/anon/ConstantPoolVisitor.java 已删除 100644 → 0
浏览文件 @ 5e449602
/*
* Copyright (c) 2008, 2011, 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 sun.invoke.anon;
/**
* A visitor called by {@link ConstantPoolParser#parse(ConstantPoolVisitor)}
* when a constant pool entry is parsed.
* <p>
* A visit* method is called when a constant pool entry is parsed.
* The first argument is always the constant pool index.
* The second argument is always the constant pool tag,
* even for methods like {@link #visitUTF8(int, byte, String)} which only apply to one tag.
* String arguments refer to Utf8 or NameAndType entries declared elsewhere,
* and are always accompanied by the indexes of those entries.
* <p>
* The order of the calls to the visit* methods is not necessarily related
* to the order of the entries in the constant pool.
* If one entry has a reference to another entry, the latter (lower-level)
* entry will be visited first.
* <p>
* The following table shows the relation between constant pool entry
* types and the corresponding visit* methods:
*
* <table border=1 cellpadding=5 summary="constant pool visitor methods">
* <tr><th>Tag(s)</th><th>Method</th></tr>
* <tr>
* <td>{@link #CONSTANT_Utf8}</td>
* <td>{@link #visitUTF8(int, byte, String)}</td>
* </tr><tr>
* <td>{@link #CONSTANT_Integer}, {@link #CONSTANT_Float},
* {@link #CONSTANT_Long}, {@link #CONSTANT_Double}</td>
* <td>{@link #visitConstantValue(int, byte, Object)}</td>
* </tr><tr>
* <td>{@link #CONSTANT_String}, {@link #CONSTANT_Class}</td>
* <td>{@link #visitConstantString(int, byte, String, int)}</td>
* </tr><tr>
* <td>{@link #CONSTANT_NameAndType}</td>
* <td>{@link #visitDescriptor(int, byte, String, String, int, int)}</td>
* </tr><tr>
* <td>{@link #CONSTANT_Fieldref},
* {@link #CONSTANT_Methodref},
* {@link #CONSTANT_InterfaceMethodref}</td>
* <td>{@link #visitMemberRef(int, byte, String, String, String, int, int)}</td>
* </tr>
* </table>
*
* @see ConstantPoolPatch
* @author Remi Forax
* @author jrose
*/
public class ConstantPoolVisitor {
/** Called each time an UTF8 constant pool entry is found.
* @param index the constant pool index
* @param tag always {@link #CONSTANT_Utf8}
* @param utf8 string encoded in modified UTF-8 format passed as a {@code String}
*
* @see ConstantPoolPatch#putUTF8(int, String)
*/
public void visitUTF8(int index, byte tag, String utf8) {
// do nothing
}
/** Called for each constant pool entry that encodes an integer,
* a float, a long, or a double.
* Constant strings and classes are not managed by this method but
* by {@link #visitConstantString(int, byte, String, int)}.
*
* @param index the constant pool index
* @param tag one of {@link #CONSTANT_Integer},
* {@link #CONSTANT_Float},
* {@link #CONSTANT_Long},
* or {@link #CONSTANT_Double}
* @param value encoded value
*
* @see ConstantPoolPatch#putConstantValue(int, Object)
*/
public void visitConstantValue(int index, byte tag, Object value) {
// do nothing
}
/** Called for each constant pool entry that encodes a string or a class.
* @param index the constant pool index
* @param tag one of {@link #CONSTANT_String},
* {@link #CONSTANT_Class},
* @param name string body or class name (using dot separator)
* @param nameIndex the index of the Utf8 string for the name
*
* @see ConstantPoolPatch#putConstantValue(int, byte, Object)
*/
public void visitConstantString(int index, byte tag,
String name, int nameIndex) {
// do nothing
}
/** Called for each constant pool entry that encodes a name and type.
* @param index the constant pool index
* @param tag always {@link #CONSTANT_NameAndType}
* @param memberName a field or method name
* @param signature the member signature
* @param memberNameIndex index of the Utf8 string for the member name
* @param signatureIndex index of the Utf8 string for the signature
*
* @see ConstantPoolPatch#putDescriptor(int, String, String)
*/
public void visitDescriptor(int index, byte tag,
String memberName, String signature,
int memberNameIndex, int signatureIndex) {
// do nothing
}
/** Called for each constant pool entry that encodes a field or method.
* @param index the constant pool index
* @param tag one of {@link #CONSTANT_Fieldref},
* or {@link #CONSTANT_Methodref},
* or {@link #CONSTANT_InterfaceMethodref}
* @param className the class name (using dot separator)
* @param memberName name of the field or method
* @param signature the field or method signature
* @param classNameIndex index of the Utf8 string for the class name
* @param descriptorIndex index of the NameAndType descriptor constant
*
* @see ConstantPoolPatch#putMemberRef(int, byte, String, String, String)
*/
public void visitMemberRef(int index, byte tag,
String className, String memberName, String signature,
int classNameIndex, int descriptorIndex) {
// do nothing
}
public static final byte
CONSTANT_None = 0,
CONSTANT_Utf8 = 1,
//CONSTANT_Unicode = 2, /* unused */
CONSTANT_Integer = 3,
CONSTANT_Float = 4,
CONSTANT_Long = 5,
CONSTANT_Double = 6,
CONSTANT_Class = 7,
CONSTANT_String = 8,
CONSTANT_Fieldref = 9,
CONSTANT_Methodref = 10,
CONSTANT_InterfaceMethodref = 11,
CONSTANT_NameAndType = 12;
private static String[] TAG_NAMES = {
"Empty",
"Utf8",
null, //"Unicode",
"Integer",
"Float",
"Long",
"Double",
"Class",
"String",
"Fieldref",
"Methodref",
"InterfaceMethodref",
"NameAndType"
};
public static String tagName(byte tag) {
String name = null;
if ((tag & 0xFF) < TAG_NAMES.length)
name = TAG_NAMES[tag];
if (name == null)
name = "Unknown#"+(tag&0xFF);
return name;
}
}
src/share/classes/sun/invoke/anon/InvalidConstantPoolFormatException.java 已删除 100644 → 0
浏览文件 @ 5e449602
/*
* Copyright (c) 2008, 2011, 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 sun.invoke.anon;
/** Exception used when there is an error in the constant pool
* format.
*/
public class InvalidConstantPoolFormatException extends Exception {
private static final long serialVersionUID=-6103888330523770949L;
public InvalidConstantPoolFormatException(String message,Throwable cause) {
super(message,cause);
}
public InvalidConstantPoolFormatException(String message) {
super(message);
}
public InvalidConstantPoolFormatException(Throwable cause) {
super(cause);
}
}
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