--- a/jdk/src/share/classes/sun/dyn/anon/ConstantPoolPatch.java Wed Jul 05 17:38:31 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,503 +0,0 @@
-/*
- * Copyright (c) 2008, 2009, 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.dyn.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.dyn.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();
- }
-}