| /* |
| * Copyright (c) 2000, 2018, 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. |
| * |
| * 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.jvm.hotspot.oops; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| // A ConstantPool is an oop containing class constants |
| // as described in the class file |
| |
| public class ConstantPool extends Metadata implements ClassConstants { |
| private class CPSlot { |
| private Address ptr; |
| |
| CPSlot(Address ptr) { |
| this.ptr = ptr; |
| } |
| |
| public Symbol getSymbol() { |
| // (Lowest bit == 1) -> this is an pseudo string. |
| return Symbol.create(ptr.andWithMask(~1)); |
| } |
| } |
| private class CPKlassSlot { |
| private int name_index; |
| private int resolved_klass_index; |
| private static final int temp_resolved_klass_index = 0xffff; |
| |
| public CPKlassSlot(int n, int rk) { |
| name_index = n; |
| resolved_klass_index = rk; |
| } |
| public int getNameIndex() { |
| return name_index; |
| } |
| public int getResolvedKlassIndex() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(resolved_klass_index != temp_resolved_klass_index, "constant pool merging was incomplete"); |
| } |
| return resolved_klass_index; |
| } |
| } |
| |
| // Used for debugging this code |
| private static final boolean DEBUG = false; |
| |
| protected void debugMessage(String message) { |
| System.out.println(message); |
| } |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("ConstantPool"); |
| tags = type.getAddressField("_tags"); |
| operands = type.getAddressField("_operands"); |
| cache = type.getAddressField("_cache"); |
| poolHolder = new MetadataField(type.getAddressField("_pool_holder"), 0); |
| length = new CIntField(type.getCIntegerField("_length"), 0); |
| resolved_klasses = type.getAddressField("_resolved_klasses"); |
| headerSize = type.getSize(); |
| elementSize = 0; |
| // fetch constants: |
| INDY_BSM_OFFSET = db.lookupIntConstant("ConstantPool::_indy_bsm_offset").intValue(); |
| INDY_ARGC_OFFSET = db.lookupIntConstant("ConstantPool::_indy_argc_offset").intValue(); |
| INDY_ARGV_OFFSET = db.lookupIntConstant("ConstantPool::_indy_argv_offset").intValue(); |
| } |
| |
| public ConstantPool(Address addr) { |
| super(addr); |
| } |
| |
| public boolean isConstantPool() { return true; } |
| |
| private static AddressField tags; |
| private static AddressField operands; |
| private static AddressField cache; |
| private static AddressField resolved_klasses; |
| private static MetadataField poolHolder; |
| private static CIntField length; // number of elements in oop |
| |
| private static long headerSize; |
| private static long elementSize; |
| |
| private static int INDY_BSM_OFFSET; |
| private static int INDY_ARGC_OFFSET; |
| private static int INDY_ARGV_OFFSET; |
| |
| public U1Array getTags() { return new U1Array(tags.getValue(getAddress())); } |
| public U2Array getOperands() { return new U2Array(operands.getValue(getAddress())); } |
| public ConstantPoolCache getCache() { |
| Address addr = cache.getValue(getAddress()); |
| return (ConstantPoolCache) VMObjectFactory.newObject(ConstantPoolCache.class, addr); |
| } |
| public InstanceKlass getPoolHolder() { return (InstanceKlass)poolHolder.getValue(this); } |
| public int getLength() { return (int)length.getValue(getAddress()); } |
| public Oop getResolvedReferences() { |
| return getCache().getResolvedReferences(); |
| } |
| public KlassArray getResolvedKlasses() { |
| return new KlassArray(resolved_klasses.getValue(getAddress())); |
| } |
| |
| public U2Array referenceMap() { |
| return getCache().referenceMap(); |
| } |
| |
| public int objectToCPIndex(int index) { |
| return referenceMap().at(index); |
| } |
| |
| private long getElementSize() { |
| if (elementSize !=0 ) { |
| return elementSize; |
| } else { |
| elementSize = VM.getVM().getOopSize(); |
| } |
| return elementSize; |
| } |
| |
| private long indexOffset(long index) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(index >= 0 && index < getLength(), "invalid cp index " + index + " " + getLength()); |
| } |
| return (index * getElementSize()) + headerSize; |
| } |
| |
| public ConstantTag getTagAt(long index) { |
| return new ConstantTag((byte)getTags().at((int) index)); |
| } |
| |
| public CPSlot getSlotAt(long index) { |
| return new CPSlot(getAddressAtRaw(index)); |
| } |
| |
| public CPKlassSlot getKlassSlotAt(long index) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(index).isUnresolvedKlass() || getTagAt(index).isKlass(), "Corrupted constant pool"); |
| } |
| int value = getIntAt(index); |
| int name_index = extractHighShortFromInt(value); |
| int resolved_klass_index = extractLowShortFromInt(value); |
| return new CPKlassSlot(name_index, resolved_klass_index); |
| } |
| |
| public Address getAddressAtRaw(long index) { |
| return getAddress().getAddressAt(indexOffset(index)); |
| } |
| |
| public Symbol getSymbolAt(long index) { |
| return Symbol.create(getAddressAtRaw(index)); |
| } |
| |
| public int getIntAt(long index){ |
| return getAddress().getJIntAt(indexOffset(index)); |
| } |
| |
| public float getFloatAt(long index){ |
| return getAddress().getJFloatAt(indexOffset(index)); |
| } |
| |
| public long getLongAt(long index) { |
| int oneHalf = getAddress().getJIntAt(indexOffset(index + 1)); |
| int otherHalf = getAddress().getJIntAt(indexOffset(index)); |
| // buildLongFromIntsPD accepts higher address value, lower address value |
| // in that order. |
| return VM.getVM().buildLongFromIntsPD(oneHalf, otherHalf); |
| } |
| |
| public double getDoubleAt(long index) { |
| return Double.longBitsToDouble(getLongAt(index)); |
| } |
| |
| public int getFieldOrMethodAt(int which) { |
| if (DEBUG) { |
| System.err.print("ConstantPool.getFieldOrMethodAt(" + which + "): new index = "); |
| } |
| int i = -1; |
| ConstantPoolCache cache = getCache(); |
| if (cache == null) { |
| i = which; |
| } else { |
| // change byte-ordering and go via cache |
| i = cache.getEntryAt(0xFFFF & which).getConstantPoolIndex(); |
| } |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(i).isFieldOrMethod(), "Corrupted constant pool"); |
| } |
| if (DEBUG) { |
| System.err.println(i); |
| } |
| int res = getIntAt(i); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getFieldOrMethodAt(" + i + "): result = " + res); |
| } |
| return res; |
| } |
| |
| public int[] getNameAndTypeAt(int which) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(which).isNameAndType(), "Corrupted constant pool: " + which + " " + getTagAt(which)); |
| } |
| int i = getIntAt(which); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getNameAndTypeAt(" + which + "): result = " + i); |
| } |
| return new int[] { extractLowShortFromInt(i), extractHighShortFromInt(i) }; |
| } |
| |
| public Symbol getNameRefAt(int which) { |
| return implGetNameRefAt(which, false); |
| } |
| |
| public Symbol uncachedGetNameRefAt(int which) { |
| return implGetNameRefAt(which, true); |
| } |
| |
| private Symbol implGetNameRefAt(int which, boolean uncached) { |
| int signatureIndex = getNameRefIndexAt(implNameAndTypeRefIndexAt(which, uncached)); |
| return getSymbolAt(signatureIndex); |
| } |
| |
| public Symbol getSignatureRefAt(int which) { |
| return implGetSignatureRefAt(which, false); |
| } |
| |
| public Symbol uncachedGetSignatureRefAt(int which) { |
| return implGetSignatureRefAt(which, true); |
| } |
| |
| private Symbol implGetSignatureRefAt(int which, boolean uncached) { |
| int signatureIndex = getSignatureRefIndexAt(implNameAndTypeRefIndexAt(which, uncached)); |
| return getSymbolAt(signatureIndex); |
| } |
| |
| public static boolean isInvokedynamicIndex(int i) { return (i < 0); } |
| |
| public static int decodeInvokedynamicIndex(int i) { Assert.that(isInvokedynamicIndex(i), ""); return ~i; } |
| |
| // The invokedynamic points at a CP cache entry. This entry points back |
| // at the original CP entry (CONSTANT_InvokeDynamic) and also (via f2) at an entry |
| // in the resolved_references array (which provides the appendix argument). |
| public int invokedynamicCPCacheIndex(int index) { |
| Assert.that(isInvokedynamicIndex(index), "should be a invokedynamic index"); |
| return decodeInvokedynamicIndex(index); |
| } |
| |
| ConstantPoolCacheEntry invokedynamicCPCacheEntryAt(int index) { |
| // decode index that invokedynamic points to. |
| int cpCacheIndex = invokedynamicCPCacheIndex(index); |
| return getCache().getEntryAt(cpCacheIndex); |
| } |
| |
| private int implNameAndTypeRefIndexAt(int which, boolean uncached) { |
| int i = which; |
| if (!uncached && getCache() != null) { |
| if (isInvokedynamicIndex(which)) { |
| // Invokedynamic index is index into resolved_references |
| int poolIndex = invokedynamicCPCacheEntryAt(which).getConstantPoolIndex(); |
| poolIndex = invokeDynamicNameAndTypeRefIndexAt(poolIndex); |
| Assert.that(getTagAt(poolIndex).isNameAndType(), ""); |
| return poolIndex; |
| } |
| // change byte-ordering and go via cache |
| i = remapInstructionOperandFromCache(which); |
| } else { |
| if (getTagAt(which).isInvokeDynamic() || getTagAt(which).isDynamicConstant()) { |
| int poolIndex = invokeDynamicNameAndTypeRefIndexAt(which); |
| Assert.that(getTagAt(poolIndex).isNameAndType(), ""); |
| return poolIndex; |
| } |
| } |
| // assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
| // assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
| int refIndex = getIntAt(i); |
| return extractHighShortFromInt(refIndex); |
| } |
| |
| private int remapInstructionOperandFromCache(int operand) { |
| int cpc_index = operand; |
| // DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); |
| // assert((int)(u2)cpc_index == cpc_index, "clean u2"); |
| int member_index = getCache().getEntryAt(cpc_index).getConstantPoolIndex(); |
| return member_index; |
| } |
| |
| public int invokeDynamicNameAndTypeRefIndexAt(int which) { |
| // assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
| return extractHighShortFromInt(getIntAt(which)); |
| } |
| |
| // returns null, if not resolved. |
| public Klass getKlassAt(int which) { |
| if( ! getTagAt(which).isKlass()) return null; |
| int resolved_klass_index = getKlassSlotAt(which).getResolvedKlassIndex(); |
| KlassArray resolved_klasses = getResolvedKlasses(); |
| return resolved_klasses.getAt(resolved_klass_index); |
| } |
| |
| public Symbol getKlassNameAt(int which) { |
| int name_index = getKlassSlotAt(which).getNameIndex(); |
| return getSymbolAt(name_index); |
| } |
| |
| public Symbol getUnresolvedStringAt(int which) { |
| return getSlotAt(which).getSymbol(); |
| } |
| |
| // returns null, if not resolved. |
| public Klass getFieldOrMethodKlassRefAt(int which) { |
| int refIndex = getFieldOrMethodAt(which); |
| int klassIndex = extractLowShortFromInt(refIndex); |
| return getKlassAt(klassIndex); |
| } |
| |
| // returns null, if not resolved. |
| public Method getMethodRefAt(int which) { |
| Klass klass = getFieldOrMethodKlassRefAt(which); |
| if (klass == null) return null; |
| Symbol name = getNameRefAt(which); |
| Symbol sig = getSignatureRefAt(which); |
| // Consider the super class for arrays. (java.lang.Object) |
| if (klass.isArrayKlass()) { |
| klass = klass.getJavaSuper(); |
| } |
| return ((InstanceKlass)klass).findMethod(name.asString(), sig.asString()); |
| } |
| |
| // returns null, if not resolved. |
| public Field getFieldRefAt(int which) { |
| InstanceKlass klass = (InstanceKlass)getFieldOrMethodKlassRefAt(which); |
| if (klass == null) return null; |
| Symbol name = getNameRefAt(which); |
| Symbol sig = getSignatureRefAt(which); |
| return klass.findField(name.asString(), sig.asString()); |
| } |
| |
| public int getNameAndTypeRefIndexAt(int index) { |
| return implNameAndTypeRefIndexAt(index, false); |
| } |
| |
| /** Lookup for entries consisting of (name_index, signature_index) */ |
| public int getNameRefIndexAt(int index) { |
| int[] refIndex = getNameAndTypeAt(index); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getNameRefIndexAt(" + index + "): refIndex = " + refIndex[0]+"/"+refIndex[1]); |
| } |
| int i = refIndex[0]; |
| if (DEBUG) { |
| System.err.println("ConstantPool.getNameRefIndexAt(" + index + "): result = " + i); |
| } |
| return i; |
| } |
| |
| /** Lookup for entries consisting of (name_index, signature_index) */ |
| public int getSignatureRefIndexAt(int index) { |
| int[] refIndex = getNameAndTypeAt(index); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getSignatureRefIndexAt(" + index + "): refIndex = " + refIndex[0]+"/"+refIndex[1]); |
| } |
| int i = refIndex[1]; |
| if (DEBUG) { |
| System.err.println("ConstantPool.getSignatureRefIndexAt(" + index + "): result = " + i); |
| } |
| return i; |
| } |
| |
| /** Lookup for MethodHandle entries. */ |
| public int getMethodHandleIndexAt(int i) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(i).isMethodHandle(), "Corrupted constant pool"); |
| } |
| int res = extractHighShortFromInt(getIntAt(i)); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getMethodHandleIndexAt(" + i + "): result = " + res); |
| } |
| return res; |
| } |
| |
| /** Lookup for MethodHandle entries. */ |
| public int getMethodHandleRefKindAt(int i) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(i).isMethodHandle(), "Corrupted constant pool"); |
| } |
| int res = extractLowShortFromInt(getIntAt(i)); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getMethodHandleRefKindAt(" + i + "): result = " + res); |
| } |
| return res; |
| } |
| |
| /** Lookup for MethodType entries. */ |
| public int getMethodTypeIndexAt(int i) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(i).isMethodType(), "Corrupted constant pool"); |
| } |
| int res = getIntAt(i); |
| if (DEBUG) { |
| System.err.println("ConstantPool.getMethodHandleTypeAt(" + i + "): result = " + res); |
| } |
| return res; |
| } |
| |
| /** Lookup for multi-operand (InvokeDynamic, Dynamic) entries. */ |
| public short[] getBootstrapSpecifierAt(int i) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(getTagAt(i).isInvokeDynamic() || getTagAt(i).isDynamicConstant(), "Corrupted constant pool"); |
| } |
| int bsmSpec = extractLowShortFromInt(this.getIntAt(i)); |
| U2Array operands = getOperands(); |
| if (operands == null) return null; // safety first |
| int basePos = VM.getVM().buildIntFromShorts(operands.at(bsmSpec * 2 + 0), |
| operands.at(bsmSpec * 2 + 1)); |
| int argv = basePos + INDY_ARGV_OFFSET; |
| int argc = operands.at(basePos + INDY_ARGC_OFFSET); |
| int endPos = argv + argc; |
| short[] values = new short[endPos - basePos]; |
| for (int j = 0; j < values.length; j++) { |
| values[j] = operands.at(basePos+j); |
| } |
| return values; |
| } |
| |
| final private static String[] nameForTag = new String[] { |
| }; |
| |
| private String nameForTag(int tag) { |
| switch (tag) { |
| case JVM_CONSTANT_Utf8: return "JVM_CONSTANT_Utf8"; |
| case JVM_CONSTANT_Unicode: return "JVM_CONSTANT_Unicode"; |
| case JVM_CONSTANT_Integer: return "JVM_CONSTANT_Integer"; |
| case JVM_CONSTANT_Float: return "JVM_CONSTANT_Float"; |
| case JVM_CONSTANT_Long: return "JVM_CONSTANT_Long"; |
| case JVM_CONSTANT_Double: return "JVM_CONSTANT_Double"; |
| case JVM_CONSTANT_Class: return "JVM_CONSTANT_Class"; |
| case JVM_CONSTANT_String: return "JVM_CONSTANT_String"; |
| case JVM_CONSTANT_Fieldref: return "JVM_CONSTANT_Fieldref"; |
| case JVM_CONSTANT_Methodref: return "JVM_CONSTANT_Methodref"; |
| case JVM_CONSTANT_InterfaceMethodref: return "JVM_CONSTANT_InterfaceMethodref"; |
| case JVM_CONSTANT_NameAndType: return "JVM_CONSTANT_NameAndType"; |
| case JVM_CONSTANT_MethodHandle: return "JVM_CONSTANT_MethodHandle"; |
| case JVM_CONSTANT_MethodType: return "JVM_CONSTANT_MethodType"; |
| case JVM_CONSTANT_Dynamic: return "JVM_CONSTANT_Dynamic"; |
| case JVM_CONSTANT_InvokeDynamic: return "JVM_CONSTANT_InvokeDynamic"; |
| case JVM_CONSTANT_Invalid: return "JVM_CONSTANT_Invalid"; |
| case JVM_CONSTANT_UnresolvedClass: return "JVM_CONSTANT_UnresolvedClass"; |
| case JVM_CONSTANT_ClassIndex: return "JVM_CONSTANT_ClassIndex"; |
| case JVM_CONSTANT_StringIndex: return "JVM_CONSTANT_StringIndex"; |
| case JVM_CONSTANT_UnresolvedClassInError: return "JVM_CONSTANT_UnresolvedClassInError"; |
| case JVM_CONSTANT_MethodHandleInError:return "JVM_CONSTANT_MethodHandleInError"; |
| case JVM_CONSTANT_MethodTypeInError: return "JVM_CONSTANT_MethodTypeInError"; |
| } |
| throw new InternalError("Unknown tag: " + tag); |
| } |
| |
| public void iterateFields(MetadataVisitor visitor) { |
| super.iterateFields(visitor); |
| visitor.doMetadata(poolHolder, true); |
| |
| final int length = (int) getLength(); |
| // zero'th pool entry is always invalid. ignore it. |
| for (int index = 1; index < length; index++) { |
| int ctag = (int) getTags().at((int) index); |
| switch (ctag) { |
| case JVM_CONSTANT_ClassIndex: |
| case JVM_CONSTANT_StringIndex: |
| case JVM_CONSTANT_Integer: |
| visitor.doInt(new IntField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| break; |
| |
| case JVM_CONSTANT_Float: |
| visitor.doFloat(new FloatField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| break; |
| |
| case JVM_CONSTANT_Long: |
| visitor.doLong(new LongField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| // long entries occupy two slots |
| index++; |
| break; |
| |
| case JVM_CONSTANT_Double: |
| visitor.doDouble(new DoubleField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| // double entries occupy two slots |
| index++; |
| break; |
| |
| case JVM_CONSTANT_UnresolvedClassInError: |
| case JVM_CONSTANT_UnresolvedClass: |
| case JVM_CONSTANT_Class: |
| case JVM_CONSTANT_Utf8: |
| visitor.doOop(new OopField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| break; |
| |
| case JVM_CONSTANT_Fieldref: |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_InterfaceMethodref: |
| case JVM_CONSTANT_NameAndType: |
| case JVM_CONSTANT_MethodHandle: |
| case JVM_CONSTANT_MethodType: |
| case JVM_CONSTANT_Dynamic: |
| case JVM_CONSTANT_InvokeDynamic: |
| visitor.doInt(new IntField(new NamedFieldIdentifier(nameForTag(ctag)), indexOffset(index), true), true); |
| break; |
| } |
| } |
| } |
| |
| public void writeBytes(OutputStream os) throws IOException { |
| // Map between any modified UTF-8 and it's constant pool index. |
| Map utf8ToIndex = new HashMap(); |
| DataOutputStream dos = new DataOutputStream(os); |
| U1Array tags = getTags(); |
| int len = (int)getLength(); |
| int ci = 0; // constant pool index |
| |
| // collect all modified UTF-8 Strings from Constant Pool |
| |
| for (ci = 1; ci < len; ci++) { |
| int cpConstType = tags.at(ci); |
| if(cpConstType == JVM_CONSTANT_Utf8) { |
| Symbol sym = getSymbolAt(ci); |
| utf8ToIndex.put(sym.asString(), new Short((short) ci)); |
| } |
| else if(cpConstType == JVM_CONSTANT_Long || |
| cpConstType == JVM_CONSTANT_Double) { |
| ci++; |
| } |
| } |
| |
| |
| for(ci = 1; ci < len; ci++) { |
| int cpConstType = tags.at(ci); |
| // write cp_info |
| // write constant type |
| switch(cpConstType) { |
| case JVM_CONSTANT_Utf8: { |
| dos.writeByte(cpConstType); |
| Symbol sym = getSymbolAt(ci); |
| dos.writeShort((short)sym.getLength()); |
| dos.write(sym.asByteArray()); |
| if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString()); |
| break; |
| } |
| |
| case JVM_CONSTANT_Unicode: |
| throw new IllegalArgumentException("Unicode constant!"); |
| |
| case JVM_CONSTANT_Integer: |
| dos.writeByte(cpConstType); |
| dos.writeInt(getIntAt(ci)); |
| if (DEBUG) debugMessage("CP[" + ci + "] = int " + getIntAt(ci)); |
| break; |
| |
| case JVM_CONSTANT_Float: |
| dos.writeByte(cpConstType); |
| dos.writeFloat(getFloatAt(ci)); |
| if (DEBUG) debugMessage("CP[" + ci + "] = float " + getFloatAt(ci)); |
| break; |
| |
| case JVM_CONSTANT_Long: { |
| dos.writeByte(cpConstType); |
| long l = getLongAt(ci); |
| // long entries occupy two pool entries |
| ci++; |
| dos.writeLong(l); |
| break; |
| } |
| |
| case JVM_CONSTANT_Double: |
| dos.writeByte(cpConstType); |
| dos.writeDouble(getDoubleAt(ci)); |
| // double entries occupy two pool entries |
| ci++; |
| break; |
| |
| case JVM_CONSTANT_Class: { |
| dos.writeByte(cpConstType); |
| // Klass already resolved. ConstantPool constains Klass*. |
| Klass refKls = (Klass)Metadata.instantiateWrapperFor(getAddressAtRaw(ci)); |
| String klassName = refKls.getName().asString(); |
| Short s = (Short) utf8ToIndex.get(klassName); |
| dos.writeShort(s.shortValue()); |
| if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); |
| break; |
| } |
| |
| // case JVM_CONSTANT_ClassIndex: |
| case JVM_CONSTANT_UnresolvedClassInError: |
| case JVM_CONSTANT_UnresolvedClass: { |
| dos.writeByte(JVM_CONSTANT_Class); |
| String klassName = getSymbolAt(ci).asString(); |
| Short s = (Short) utf8ToIndex.get(klassName); |
| dos.writeShort(s.shortValue()); |
| if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); |
| break; |
| } |
| |
| case JVM_CONSTANT_String: { |
| dos.writeByte(cpConstType); |
| String str = getUnresolvedStringAt(ci).asString(); |
| Short s = (Short) utf8ToIndex.get(str); |
| dos.writeShort(s.shortValue()); |
| if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); |
| break; |
| } |
| |
| // all external, internal method/field references |
| case JVM_CONSTANT_Fieldref: |
| case JVM_CONSTANT_Methodref: |
| case JVM_CONSTANT_InterfaceMethodref: { |
| dos.writeByte(cpConstType); |
| int value = getIntAt(ci); |
| short klassIndex = (short) extractLowShortFromInt(value); |
| short nameAndTypeIndex = (short) extractHighShortFromInt(value); |
| dos.writeShort(klassIndex); |
| dos.writeShort(nameAndTypeIndex); |
| if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " + |
| klassIndex + ", N&T = " + nameAndTypeIndex); |
| break; |
| } |
| |
| case JVM_CONSTANT_NameAndType: { |
| dos.writeByte(cpConstType); |
| int value = getIntAt(ci); |
| short nameIndex = (short) extractLowShortFromInt(value); |
| short signatureIndex = (short) extractHighShortFromInt(value); |
| dos.writeShort(nameIndex); |
| dos.writeShort(signatureIndex); |
| if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex |
| + ", type = " + signatureIndex); |
| break; |
| } |
| |
| case JVM_CONSTANT_MethodHandle: { |
| dos.writeByte(cpConstType); |
| int value = getIntAt(ci); |
| byte refKind = (byte) extractLowShortFromInt(value); |
| short memberIndex = (short) extractHighShortFromInt(value); |
| dos.writeByte(refKind); |
| dos.writeShort(memberIndex); |
| if (DEBUG) debugMessage("CP[" + ci + "] = MH kind = " + |
| refKind + ", mem = " + memberIndex); |
| break; |
| } |
| |
| case JVM_CONSTANT_MethodType: { |
| dos.writeByte(cpConstType); |
| int value = getIntAt(ci); |
| short refIndex = (short) value; |
| dos.writeShort(refIndex); |
| if (DEBUG) debugMessage("CP[" + ci + "] = MT index = " + refIndex); |
| break; |
| } |
| |
| case JVM_CONSTANT_InvokeDynamic: { |
| dos.writeByte(cpConstType); |
| int value = getIntAt(ci); |
| short bsmIndex = (short) extractLowShortFromInt(value); |
| short nameAndTypeIndex = (short) extractHighShortFromInt(value); |
| dos.writeShort(bsmIndex); |
| dos.writeShort(nameAndTypeIndex); |
| if (DEBUG) debugMessage("CP[" + ci + "] = INDY bsm = " + |
| bsmIndex + ", N&T = " + nameAndTypeIndex); |
| break; |
| } |
| |
| default: |
| throw new InternalError("Unknown tag: " + cpConstType); |
| } // switch |
| } |
| dos.flush(); |
| return; |
| } |
| |
| public void printValueOn(PrintStream tty) { |
| tty.print("ConstantPool for " + getPoolHolder().getName().asString()); |
| } |
| |
| public long getSize() { |
| return alignSize(headerSize + getLength()); |
| } |
| |
| //---------------------------------------------------------------------- |
| // Internals only below this point |
| // |
| |
| private static int extractHighShortFromInt(int val) { |
| // must stay in sync with ConstantPool::name_and_type_at_put, method_at_put, etc. |
| return (val >> 16) & 0xFFFF; |
| } |
| |
| private static int extractLowShortFromInt(int val) { |
| // must stay in sync with ConstantPool::name_and_type_at_put, method_at_put, etc. |
| return val & 0xFFFF; |
| } |
| } |
