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Clisprail
359 lines
11 KiB
Java
359 lines
11 KiB
Java
/***
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* ASM: a very small and fast Java bytecode manipulation framework
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* Copyright (c) 2000-2011 INRIA, France Telecom
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.objectweb.asm.tree.analysis;
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import java.util.List;
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import org.objectweb.asm.Handle;
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import org.objectweb.asm.Opcodes;
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import org.objectweb.asm.Type;
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import org.objectweb.asm.tree.AbstractInsnNode;
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import org.objectweb.asm.tree.FieldInsnNode;
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import org.objectweb.asm.tree.IntInsnNode;
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import org.objectweb.asm.tree.InvokeDynamicInsnNode;
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import org.objectweb.asm.tree.LdcInsnNode;
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import org.objectweb.asm.tree.MethodInsnNode;
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import org.objectweb.asm.tree.MultiANewArrayInsnNode;
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import org.objectweb.asm.tree.TypeInsnNode;
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/**
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* An {@link Interpreter} for {@link BasicValue} values.
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*
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* @author Eric Bruneton
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* @author Bing Ran
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*/
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public class BasicInterpreter extends Interpreter<BasicValue> implements
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Opcodes {
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public BasicInterpreter() {
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super(ASM4);
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}
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protected BasicInterpreter(final int api) {
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super(api);
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}
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@Override
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public BasicValue newValue(final Type type) {
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if (type == null) {
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return BasicValue.UNINITIALIZED_VALUE;
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}
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switch (type.getSort()) {
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case Type.VOID:
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return null;
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case Type.BOOLEAN:
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case Type.CHAR:
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case Type.BYTE:
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case Type.SHORT:
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case Type.INT:
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return BasicValue.INT_VALUE;
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case Type.FLOAT:
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return BasicValue.FLOAT_VALUE;
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case Type.LONG:
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return BasicValue.LONG_VALUE;
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case Type.DOUBLE:
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return BasicValue.DOUBLE_VALUE;
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case Type.ARRAY:
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case Type.OBJECT:
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return BasicValue.REFERENCE_VALUE;
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default:
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throw new Error("Internal error");
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}
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}
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@Override
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public BasicValue newOperation(final AbstractInsnNode insn)
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throws AnalyzerException {
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switch (insn.getOpcode()) {
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case ACONST_NULL:
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return newValue(Type.getObjectType("null"));
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case ICONST_M1:
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case ICONST_0:
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case ICONST_1:
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case ICONST_2:
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case ICONST_3:
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case ICONST_4:
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case ICONST_5:
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return BasicValue.INT_VALUE;
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case LCONST_0:
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case LCONST_1:
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return BasicValue.LONG_VALUE;
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case FCONST_0:
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case FCONST_1:
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case FCONST_2:
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return BasicValue.FLOAT_VALUE;
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case DCONST_0:
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case DCONST_1:
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return BasicValue.DOUBLE_VALUE;
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case BIPUSH:
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case SIPUSH:
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return BasicValue.INT_VALUE;
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case LDC:
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Object cst = ((LdcInsnNode) insn).cst;
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if (cst instanceof Integer) {
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return BasicValue.INT_VALUE;
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} else if (cst instanceof Float) {
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return BasicValue.FLOAT_VALUE;
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} else if (cst instanceof Long) {
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return BasicValue.LONG_VALUE;
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} else if (cst instanceof Double) {
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return BasicValue.DOUBLE_VALUE;
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} else if (cst instanceof String) {
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return newValue(Type.getObjectType("java/lang/String"));
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} else if (cst instanceof Type) {
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int sort = ((Type) cst).getSort();
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if (sort == Type.OBJECT || sort == Type.ARRAY) {
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return newValue(Type.getObjectType("java/lang/Class"));
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} else if (sort == Type.METHOD) {
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return newValue(Type
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.getObjectType("java/lang/invoke/MethodType"));
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} else {
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throw new IllegalArgumentException("Illegal LDC constant "
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+ cst);
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}
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} else if (cst instanceof Handle) {
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return newValue(Type
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.getObjectType("java/lang/invoke/MethodHandle"));
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} else {
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throw new IllegalArgumentException("Illegal LDC constant "
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+ cst);
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}
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case JSR:
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return BasicValue.RETURNADDRESS_VALUE;
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case GETSTATIC:
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return newValue(Type.getType(((FieldInsnNode) insn).desc));
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case NEW:
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return newValue(Type.getObjectType(((TypeInsnNode) insn).desc));
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default:
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throw new Error("Internal error.");
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}
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}
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@Override
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public BasicValue copyOperation(final AbstractInsnNode insn,
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final BasicValue value) throws AnalyzerException {
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return value;
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}
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@Override
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public BasicValue unaryOperation(final AbstractInsnNode insn,
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final BasicValue value) throws AnalyzerException {
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switch (insn.getOpcode()) {
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case INEG:
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case IINC:
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case L2I:
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case F2I:
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case D2I:
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case I2B:
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case I2C:
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case I2S:
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return BasicValue.INT_VALUE;
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case FNEG:
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case I2F:
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case L2F:
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case D2F:
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return BasicValue.FLOAT_VALUE;
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case LNEG:
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case I2L:
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case F2L:
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case D2L:
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return BasicValue.LONG_VALUE;
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case DNEG:
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case I2D:
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case L2D:
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case F2D:
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return BasicValue.DOUBLE_VALUE;
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case IFEQ:
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case IFNE:
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case IFLT:
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case IFGE:
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case IFGT:
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case IFLE:
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case TABLESWITCH:
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case LOOKUPSWITCH:
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case IRETURN:
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case LRETURN:
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case FRETURN:
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case DRETURN:
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case ARETURN:
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case PUTSTATIC:
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return null;
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case GETFIELD:
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return newValue(Type.getType(((FieldInsnNode) insn).desc));
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case NEWARRAY:
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switch (((IntInsnNode) insn).operand) {
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case T_BOOLEAN:
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return newValue(Type.getType("[Z"));
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case T_CHAR:
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return newValue(Type.getType("[C"));
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case T_BYTE:
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return newValue(Type.getType("[B"));
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case T_SHORT:
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return newValue(Type.getType("[S"));
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case T_INT:
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return newValue(Type.getType("[I"));
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case T_FLOAT:
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return newValue(Type.getType("[F"));
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case T_DOUBLE:
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return newValue(Type.getType("[D"));
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case T_LONG:
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return newValue(Type.getType("[J"));
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default:
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throw new AnalyzerException(insn, "Invalid array type");
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}
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case ANEWARRAY:
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String desc = ((TypeInsnNode) insn).desc;
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return newValue(Type.getType("[" + Type.getObjectType(desc)));
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case ARRAYLENGTH:
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return BasicValue.INT_VALUE;
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case ATHROW:
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return null;
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case CHECKCAST:
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desc = ((TypeInsnNode) insn).desc;
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return newValue(Type.getObjectType(desc));
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case INSTANCEOF:
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return BasicValue.INT_VALUE;
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case MONITORENTER:
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case MONITOREXIT:
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case IFNULL:
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case IFNONNULL:
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return null;
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default:
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throw new Error("Internal error.");
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}
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}
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@Override
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public BasicValue binaryOperation(final AbstractInsnNode insn,
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final BasicValue value1, final BasicValue value2)
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throws AnalyzerException {
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switch (insn.getOpcode()) {
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case IALOAD:
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case BALOAD:
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case CALOAD:
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case SALOAD:
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case IADD:
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case ISUB:
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case IMUL:
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case IDIV:
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case IREM:
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case ISHL:
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case ISHR:
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case IUSHR:
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case IAND:
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case IOR:
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case IXOR:
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return BasicValue.INT_VALUE;
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case FALOAD:
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case FADD:
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case FSUB:
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case FMUL:
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case FDIV:
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case FREM:
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return BasicValue.FLOAT_VALUE;
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case LALOAD:
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case LADD:
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case LSUB:
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case LMUL:
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case LDIV:
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case LREM:
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case LSHL:
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case LSHR:
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case LUSHR:
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case LAND:
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case LOR:
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case LXOR:
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return BasicValue.LONG_VALUE;
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case DALOAD:
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case DADD:
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case DSUB:
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case DMUL:
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case DDIV:
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case DREM:
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return BasicValue.DOUBLE_VALUE;
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case AALOAD:
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return BasicValue.REFERENCE_VALUE;
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case LCMP:
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case FCMPL:
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case FCMPG:
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case DCMPL:
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case DCMPG:
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return BasicValue.INT_VALUE;
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case IF_ICMPEQ:
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case IF_ICMPNE:
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case IF_ICMPLT:
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case IF_ICMPGE:
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case IF_ICMPGT:
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case IF_ICMPLE:
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case IF_ACMPEQ:
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case IF_ACMPNE:
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case PUTFIELD:
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return null;
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default:
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throw new Error("Internal error.");
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}
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}
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@Override
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public BasicValue ternaryOperation(final AbstractInsnNode insn,
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final BasicValue value1, final BasicValue value2,
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final BasicValue value3) throws AnalyzerException {
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return null;
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}
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@Override
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public BasicValue naryOperation(final AbstractInsnNode insn,
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final List<? extends BasicValue> values) throws AnalyzerException {
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int opcode = insn.getOpcode();
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if (opcode == MULTIANEWARRAY) {
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return newValue(Type.getType(((MultiANewArrayInsnNode) insn).desc));
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} else if (opcode == INVOKEDYNAMIC) {
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return newValue(Type
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.getReturnType(((InvokeDynamicInsnNode) insn).desc));
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} else {
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return newValue(Type.getReturnType(((MethodInsnNode) insn).desc));
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}
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}
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@Override
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public void returnOperation(final AbstractInsnNode insn,
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final BasicValue value, final BasicValue expected)
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throws AnalyzerException {
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}
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@Override
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public BasicValue merge(final BasicValue v, final BasicValue w) {
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if (!v.equals(w)) {
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return BasicValue.UNINITIALIZED_VALUE;
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}
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return v;
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}
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}
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