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org.objectweb.asm.commons.AnalyzerAdapter Maven / Gradle / Ivy
// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.commons;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
/**
* A {@link MethodVisitor} that keeps track of stack map frame changes between {@link
* #visitFrame(int, int, Object[], int, Object[])} calls. This adapter must be used with the {@link
* org.objectweb.asm.ClassReader#EXPAND_FRAMES} option. Each visitX instruction delegates to
* the next visitor in the chain, if any, and then simulates the effect of this instruction on the
* stack map frame, represented by {@link #locals} and {@link #stack}. The next visitor in the chain
* can get the state of the stack map frame before each instruction by reading the value of
* these fields in its visitX methods (this requires a reference to the AnalyzerAdapter that
* is before it in the chain). If this adapter is used with a class that does not contain stack map
* table attributes (i.e., pre Java 6 classes) then this adapter may not be able to compute the
* stack map frame for each instruction. In this case no exception is thrown but the {@link #locals}
* and {@link #stack} fields will be null for these instructions.
*
* @author Eric Bruneton
*/
public class AnalyzerAdapter extends MethodVisitor {
/**
* The local variable slots for the current execution frame. Primitive types are represented by
* {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link Opcodes#FLOAT}, {@link Opcodes#LONG},
* {@link Opcodes#DOUBLE},{@link Opcodes#NULL} or {@link Opcodes#UNINITIALIZED_THIS} (long and
* double are represented by two elements, the second one being TOP). Reference types are
* represented by String objects (representing internal names), and uninitialized types by Label
* objects (this label designates the NEW instruction that created this uninitialized value). This
* field is {@literal null} for unreachable instructions.
*/
public List locals;
/**
* The operand stack slots for the current execution frame. Primitive types are represented by
* {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link Opcodes#FLOAT}, {@link Opcodes#LONG},
* {@link Opcodes#DOUBLE},{@link Opcodes#NULL} or {@link Opcodes#UNINITIALIZED_THIS} (long and
* double are represented by two elements, the second one being TOP). Reference types are
* represented by String objects (representing internal names), and uninitialized types by Label
* objects (this label designates the NEW instruction that created this uninitialized value). This
* field is {@literal null} for unreachable instructions.
*/
public List stack;
/** The labels that designate the next instruction to be visited. May be {@literal null}. */
private List labels;
/**
* The uninitialized types in the current execution frame. This map associates internal names to
* Label objects. Each label designates a NEW instruction that created the currently uninitialized
* types, and the associated internal name represents the NEW operand, i.e. the final, initialized
* type value.
*/
public Map uninitializedTypes;
/** The maximum stack size of this method. */
private int maxStack;
/** The maximum number of local variables of this method. */
private int maxLocals;
/** The owner's class name. */
private String owner;
/**
* Constructs a new {@link AnalyzerAdapter}. Subclasses must not use this constructor .
* Instead, they must use the {@link #AnalyzerAdapter(int, String, int, String, String,
* MethodVisitor)} version.
*
* @param owner the owner's class name.
* @param access the method's access flags (see {@link Opcodes}).
* @param name the method's name.
* @param descriptor the method's descriptor (see {@link Type}).
* @param methodVisitor the method visitor to which this adapter delegates calls. May be {@literal
* null}.
* @throws IllegalStateException If a subclass calls this constructor.
*/
public AnalyzerAdapter(
final String owner,
final int access,
final String name,
final String descriptor,
final MethodVisitor methodVisitor) {
this(/* latest api = */ Opcodes.ASM8, owner, access, name, descriptor, methodVisitor);
if (getClass() != AnalyzerAdapter.class) {
throw new IllegalStateException();
}
}
/**
* Constructs a new {@link AnalyzerAdapter}.
*
* @param api the ASM API version implemented by this visitor. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6}, {@link Opcodes#ASM7} or {@link
* Opcodes#ASM8}.
* @param owner the owner's class name.
* @param access the method's access flags (see {@link Opcodes}).
* @param name the method's name.
* @param descriptor the method's descriptor (see {@link Type}).
* @param methodVisitor the method visitor to which this adapter delegates calls. May be {@literal
* null}.
*/
protected AnalyzerAdapter(
final int api,
final String owner,
final int access,
final String name,
final String descriptor,
final MethodVisitor methodVisitor) {
super(api, methodVisitor);
this.owner = owner;
locals = new ArrayList<>();
stack = new ArrayList<>();
uninitializedTypes = new HashMap<>();
if ((access & Opcodes.ACC_STATIC) == 0) {
if ("".equals(name)) {
locals.add(Opcodes.UNINITIALIZED_THIS);
} else {
locals.add(owner);
}
}
for (Type argumentType : Type.getArgumentTypes(descriptor)) {
switch (argumentType.getSort()) {
case Type.BOOLEAN:
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
case Type.INT:
locals.add(Opcodes.INTEGER);
break;
case Type.FLOAT:
locals.add(Opcodes.FLOAT);
break;
case Type.LONG:
locals.add(Opcodes.LONG);
locals.add(Opcodes.TOP);
break;
case Type.DOUBLE:
locals.add(Opcodes.DOUBLE);
locals.add(Opcodes.TOP);
break;
case Type.ARRAY:
locals.add(argumentType.getDescriptor());
break;
case Type.OBJECT:
locals.add(argumentType.getInternalName());
break;
default:
throw new AssertionError();
}
}
maxLocals = locals.size();
}
@Override
public void visitFrame(
final int type,
final int numLocal,
final Object[] local,
final int numStack,
final Object[] stack) {
if (type != Opcodes.F_NEW) { // Uncompressed frame.
throw new IllegalArgumentException(
"AnalyzerAdapter only accepts expanded frames (see ClassReader.EXPAND_FRAMES)");
}
super.visitFrame(type, numLocal, local, numStack, stack);
if (this.locals != null) {
this.locals.clear();
this.stack.clear();
} else {
this.locals = new ArrayList<>();
this.stack = new ArrayList<>();
}
visitFrameTypes(numLocal, local, this.locals);
visitFrameTypes(numStack, stack, this.stack);
maxLocals = Math.max(maxLocals, this.locals.size());
maxStack = Math.max(maxStack, this.stack.size());
}
private static void visitFrameTypes(
final int numTypes, final Object[] frameTypes, final List result) {
for (int i = 0; i < numTypes; ++i) {
Object frameType = frameTypes[i];
result.add(frameType);
if (frameType == Opcodes.LONG || frameType == Opcodes.DOUBLE) {
result.add(Opcodes.TOP);
}
}
}
@Override
public void visitInsn(final int opcode) {
super.visitInsn(opcode);
execute(opcode, 0, null);
if ((opcode >= Opcodes.IRETURN && opcode <= Opcodes.RETURN) || opcode == Opcodes.ATHROW) {
this.locals = null;
this.stack = null;
}
}
@Override
public void visitIntInsn(final int opcode, final int operand) {
super.visitIntInsn(opcode, operand);
execute(opcode, operand, null);
}
@Override
public void visitVarInsn(final int opcode, final int var) {
super.visitVarInsn(opcode, var);
boolean isLongOrDouble =
opcode == Opcodes.LLOAD
|| opcode == Opcodes.DLOAD
|| opcode == Opcodes.LSTORE
|| opcode == Opcodes.DSTORE;
maxLocals = Math.max(maxLocals, var + (isLongOrDouble ? 2 : 1));
execute(opcode, var, null);
}
@Override
public void visitTypeInsn(final int opcode, final String type) {
if (opcode == Opcodes.NEW) {
if (labels == null) {
Label label = new Label();
labels = new ArrayList<>(3);
labels.add(label);
if (mv != null) {
mv.visitLabel(label);
}
}
for (Label label : labels) {
uninitializedTypes.put(label, type);
}
}
super.visitTypeInsn(opcode, type);
execute(opcode, 0, type);
}
@Override
public void visitFieldInsn(
final int opcode, final String owner, final String name, final String descriptor) {
super.visitFieldInsn(opcode, owner, name, descriptor);
execute(opcode, 0, descriptor);
}
@Override
public void visitMethodInsn(
final int opcodeAndSource,
final String owner,
final String name,
final String descriptor,
final boolean isInterface) {
if (api < Opcodes.ASM5 && (opcodeAndSource & Opcodes.SOURCE_DEPRECATED) == 0) {
// Redirect the call to the deprecated version of this method.
super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
return;
}
super.visitMethodInsn(opcodeAndSource, owner, name, descriptor, isInterface);
int opcode = opcodeAndSource & ~Opcodes.SOURCE_MASK;
if (this.locals == null) {
labels = null;
return;
}
pop(descriptor);
if (opcode != Opcodes.INVOKESTATIC) {
Object value = pop();
if (opcode == Opcodes.INVOKESPECIAL && name.equals("")) {
Object initializedValue;
if (value == Opcodes.UNINITIALIZED_THIS) {
initializedValue = this.owner;
} else {
initializedValue = uninitializedTypes.get(value);
}
for (int i = 0; i < locals.size(); ++i) {
if (locals.get(i) == value) {
locals.set(i, initializedValue);
}
}
for (int i = 0; i < stack.size(); ++i) {
if (stack.get(i) == value) {
stack.set(i, initializedValue);
}
}
}
}
pushDescriptor(descriptor);
labels = null;
}
@Override
public void visitInvokeDynamicInsn(
final String name,
final String descriptor,
final Handle bootstrapMethodHandle,
final Object... bootstrapMethodArguments) {
super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
if (this.locals == null) {
labels = null;
return;
}
pop(descriptor);
pushDescriptor(descriptor);
labels = null;
}
@Override
public void visitJumpInsn(final int opcode, final Label label) {
super.visitJumpInsn(opcode, label);
execute(opcode, 0, null);
if (opcode == Opcodes.GOTO) {
this.locals = null;
this.stack = null;
}
}
@Override
public void visitLabel(final Label label) {
super.visitLabel(label);
if (labels == null) {
labels = new ArrayList<>(3);
}
labels.add(label);
}
@Override
public void visitLdcInsn(final Object value) {
super.visitLdcInsn(value);
if (this.locals == null) {
labels = null;
return;
}
if (value instanceof Integer) {
push(Opcodes.INTEGER);
} else if (value instanceof Long) {
push(Opcodes.LONG);
push(Opcodes.TOP);
} else if (value instanceof Float) {
push(Opcodes.FLOAT);
} else if (value instanceof Double) {
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
} else if (value instanceof String) {
push("java/lang/String");
} else if (value instanceof Type) {
int sort = ((Type) value).getSort();
if (sort == Type.OBJECT || sort == Type.ARRAY) {
push("java/lang/Class");
} else if (sort == Type.METHOD) {
push("java/lang/invoke/MethodType");
} else {
throw new IllegalArgumentException();
}
} else if (value instanceof Handle) {
push("java/lang/invoke/MethodHandle");
} else if (value instanceof ConstantDynamic) {
pushDescriptor(((ConstantDynamic) value).getDescriptor());
} else {
throw new IllegalArgumentException();
}
labels = null;
}
@Override
public void visitIincInsn(final int var, final int increment) {
super.visitIincInsn(var, increment);
maxLocals = Math.max(maxLocals, var + 1);
execute(Opcodes.IINC, var, null);
}
@Override
public void visitTableSwitchInsn(
final int min, final int max, final Label dflt, final Label... labels) {
super.visitTableSwitchInsn(min, max, dflt, labels);
execute(Opcodes.TABLESWITCH, 0, null);
this.locals = null;
this.stack = null;
}
@Override
public void visitLookupSwitchInsn(final Label dflt, final int[] keys, final Label[] labels) {
super.visitLookupSwitchInsn(dflt, keys, labels);
execute(Opcodes.LOOKUPSWITCH, 0, null);
this.locals = null;
this.stack = null;
}
@Override
public void visitMultiANewArrayInsn(final String descriptor, final int numDimensions) {
super.visitMultiANewArrayInsn(descriptor, numDimensions);
execute(Opcodes.MULTIANEWARRAY, numDimensions, descriptor);
}
@Override
public void visitLocalVariable(
final String name,
final String descriptor,
final String signature,
final Label start,
final Label end,
final int index) {
char firstDescriptorChar = descriptor.charAt(0);
maxLocals =
Math.max(
maxLocals, index + (firstDescriptorChar == 'J' || firstDescriptorChar == 'D' ? 2 : 1));
super.visitLocalVariable(name, descriptor, signature, start, end, index);
}
@Override
public void visitMaxs(final int maxStack, final int maxLocals) {
if (mv != null) {
this.maxStack = Math.max(this.maxStack, maxStack);
this.maxLocals = Math.max(this.maxLocals, maxLocals);
mv.visitMaxs(this.maxStack, this.maxLocals);
}
}
// -----------------------------------------------------------------------------------------------
private Object get(final int local) {
maxLocals = Math.max(maxLocals, local + 1);
return local < locals.size() ? locals.get(local) : Opcodes.TOP;
}
private void set(final int local, final Object type) {
maxLocals = Math.max(maxLocals, local + 1);
while (local >= locals.size()) {
locals.add(Opcodes.TOP);
}
locals.set(local, type);
}
private void push(final Object type) {
stack.add(type);
maxStack = Math.max(maxStack, stack.size());
}
private void pushDescriptor(final String fieldOrMethodDescriptor) {
String descriptor =
fieldOrMethodDescriptor.charAt(0) == '('
? Type.getReturnType(fieldOrMethodDescriptor).getDescriptor()
: fieldOrMethodDescriptor;
switch (descriptor.charAt(0)) {
case 'V':
return;
case 'Z':
case 'C':
case 'B':
case 'S':
case 'I':
push(Opcodes.INTEGER);
return;
case 'F':
push(Opcodes.FLOAT);
return;
case 'J':
push(Opcodes.LONG);
push(Opcodes.TOP);
return;
case 'D':
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
return;
case '[':
push(descriptor);
break;
case 'L':
push(descriptor.substring(1, descriptor.length() - 1));
break;
default:
throw new AssertionError();
}
}
private Object pop() {
return stack.remove(stack.size() - 1);
}
private void pop(final int numSlots) {
int size = stack.size();
int end = size - numSlots;
for (int i = size - 1; i >= end; --i) {
stack.remove(i);
}
}
private void pop(final String descriptor) {
char firstDescriptorChar = descriptor.charAt(0);
if (firstDescriptorChar == '(') {
int numSlots = 0;
Type[] types = Type.getArgumentTypes(descriptor);
for (Type type : types) {
numSlots += type.getSize();
}
pop(numSlots);
} else if (firstDescriptorChar == 'J' || firstDescriptorChar == 'D') {
pop(2);
} else {
pop(1);
}
}
private void execute(final int opcode, final int intArg, final String stringArg) {
if (opcode == Opcodes.JSR || opcode == Opcodes.RET) {
throw new IllegalArgumentException("JSR/RET are not supported");
}
if (this.locals == null) {
labels = null;
return;
}
Object value1;
Object value2;
Object value3;
Object t4;
switch (opcode) {
case Opcodes.NOP:
case Opcodes.INEG:
case Opcodes.LNEG:
case Opcodes.FNEG:
case Opcodes.DNEG:
case Opcodes.I2B:
case Opcodes.I2C:
case Opcodes.I2S:
case Opcodes.GOTO:
case Opcodes.RETURN:
break;
case Opcodes.ACONST_NULL:
push(Opcodes.NULL);
break;
case Opcodes.ICONST_M1:
case Opcodes.ICONST_0:
case Opcodes.ICONST_1:
case Opcodes.ICONST_2:
case Opcodes.ICONST_3:
case Opcodes.ICONST_4:
case Opcodes.ICONST_5:
case Opcodes.BIPUSH:
case Opcodes.SIPUSH:
push(Opcodes.INTEGER);
break;
case Opcodes.LCONST_0:
case Opcodes.LCONST_1:
push(Opcodes.LONG);
push(Opcodes.TOP);
break;
case Opcodes.FCONST_0:
case Opcodes.FCONST_1:
case Opcodes.FCONST_2:
push(Opcodes.FLOAT);
break;
case Opcodes.DCONST_0:
case Opcodes.DCONST_1:
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
break;
case Opcodes.ILOAD:
case Opcodes.FLOAD:
case Opcodes.ALOAD:
push(get(intArg));
break;
case Opcodes.LLOAD:
case Opcodes.DLOAD:
push(get(intArg));
push(Opcodes.TOP);
break;
case Opcodes.LALOAD:
case Opcodes.D2L:
pop(2);
push(Opcodes.LONG);
push(Opcodes.TOP);
break;
case Opcodes.DALOAD:
case Opcodes.L2D:
pop(2);
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
break;
case Opcodes.AALOAD:
pop(1);
value1 = pop();
if (value1 instanceof String) {
pushDescriptor(((String) value1).substring(1));
} else if (value1 == Opcodes.NULL) {
push(value1);
} else {
push("java/lang/Object");
}
break;
case Opcodes.ISTORE:
case Opcodes.FSTORE:
case Opcodes.ASTORE:
value1 = pop();
set(intArg, value1);
if (intArg > 0) {
value2 = get(intArg - 1);
if (value2 == Opcodes.LONG || value2 == Opcodes.DOUBLE) {
set(intArg - 1, Opcodes.TOP);
}
}
break;
case Opcodes.LSTORE:
case Opcodes.DSTORE:
pop(1);
value1 = pop();
set(intArg, value1);
set(intArg + 1, Opcodes.TOP);
if (intArg > 0) {
value2 = get(intArg - 1);
if (value2 == Opcodes.LONG || value2 == Opcodes.DOUBLE) {
set(intArg - 1, Opcodes.TOP);
}
}
break;
case Opcodes.IASTORE:
case Opcodes.BASTORE:
case Opcodes.CASTORE:
case Opcodes.SASTORE:
case Opcodes.FASTORE:
case Opcodes.AASTORE:
pop(3);
break;
case Opcodes.LASTORE:
case Opcodes.DASTORE:
pop(4);
break;
case Opcodes.POP:
case Opcodes.IFEQ:
case Opcodes.IFNE:
case Opcodes.IFLT:
case Opcodes.IFGE:
case Opcodes.IFGT:
case Opcodes.IFLE:
case Opcodes.IRETURN:
case Opcodes.FRETURN:
case Opcodes.ARETURN:
case Opcodes.TABLESWITCH:
case Opcodes.LOOKUPSWITCH:
case Opcodes.ATHROW:
case Opcodes.MONITORENTER:
case Opcodes.MONITOREXIT:
case Opcodes.IFNULL:
case Opcodes.IFNONNULL:
pop(1);
break;
case Opcodes.POP2:
case Opcodes.IF_ICMPEQ:
case Opcodes.IF_ICMPNE:
case Opcodes.IF_ICMPLT:
case Opcodes.IF_ICMPGE:
case Opcodes.IF_ICMPGT:
case Opcodes.IF_ICMPLE:
case Opcodes.IF_ACMPEQ:
case Opcodes.IF_ACMPNE:
case Opcodes.LRETURN:
case Opcodes.DRETURN:
pop(2);
break;
case Opcodes.DUP:
value1 = pop();
push(value1);
push(value1);
break;
case Opcodes.DUP_X1:
value1 = pop();
value2 = pop();
push(value1);
push(value2);
push(value1);
break;
case Opcodes.DUP_X2:
value1 = pop();
value2 = pop();
value3 = pop();
push(value1);
push(value3);
push(value2);
push(value1);
break;
case Opcodes.DUP2:
value1 = pop();
value2 = pop();
push(value2);
push(value1);
push(value2);
push(value1);
break;
case Opcodes.DUP2_X1:
value1 = pop();
value2 = pop();
value3 = pop();
push(value2);
push(value1);
push(value3);
push(value2);
push(value1);
break;
case Opcodes.DUP2_X2:
value1 = pop();
value2 = pop();
value3 = pop();
t4 = pop();
push(value2);
push(value1);
push(t4);
push(value3);
push(value2);
push(value1);
break;
case Opcodes.SWAP:
value1 = pop();
value2 = pop();
push(value1);
push(value2);
break;
case Opcodes.IALOAD:
case Opcodes.BALOAD:
case Opcodes.CALOAD:
case Opcodes.SALOAD:
case Opcodes.IADD:
case Opcodes.ISUB:
case Opcodes.IMUL:
case Opcodes.IDIV:
case Opcodes.IREM:
case Opcodes.IAND:
case Opcodes.IOR:
case Opcodes.IXOR:
case Opcodes.ISHL:
case Opcodes.ISHR:
case Opcodes.IUSHR:
case Opcodes.L2I:
case Opcodes.D2I:
case Opcodes.FCMPL:
case Opcodes.FCMPG:
pop(2);
push(Opcodes.INTEGER);
break;
case Opcodes.LADD:
case Opcodes.LSUB:
case Opcodes.LMUL:
case Opcodes.LDIV:
case Opcodes.LREM:
case Opcodes.LAND:
case Opcodes.LOR:
case Opcodes.LXOR:
pop(4);
push(Opcodes.LONG);
push(Opcodes.TOP);
break;
case Opcodes.FALOAD:
case Opcodes.FADD:
case Opcodes.FSUB:
case Opcodes.FMUL:
case Opcodes.FDIV:
case Opcodes.FREM:
case Opcodes.L2F:
case Opcodes.D2F:
pop(2);
push(Opcodes.FLOAT);
break;
case Opcodes.DADD:
case Opcodes.DSUB:
case Opcodes.DMUL:
case Opcodes.DDIV:
case Opcodes.DREM:
pop(4);
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
break;
case Opcodes.LSHL:
case Opcodes.LSHR:
case Opcodes.LUSHR:
pop(3);
push(Opcodes.LONG);
push(Opcodes.TOP);
break;
case Opcodes.IINC:
set(intArg, Opcodes.INTEGER);
break;
case Opcodes.I2L:
case Opcodes.F2L:
pop(1);
push(Opcodes.LONG);
push(Opcodes.TOP);
break;
case Opcodes.I2F:
pop(1);
push(Opcodes.FLOAT);
break;
case Opcodes.I2D:
case Opcodes.F2D:
pop(1);
push(Opcodes.DOUBLE);
push(Opcodes.TOP);
break;
case Opcodes.F2I:
case Opcodes.ARRAYLENGTH:
case Opcodes.INSTANCEOF:
pop(1);
push(Opcodes.INTEGER);
break;
case Opcodes.LCMP:
case Opcodes.DCMPL:
case Opcodes.DCMPG:
pop(4);
push(Opcodes.INTEGER);
break;
case Opcodes.GETSTATIC:
pushDescriptor(stringArg);
break;
case Opcodes.PUTSTATIC:
pop(stringArg);
break;
case Opcodes.GETFIELD:
pop(1);
pushDescriptor(stringArg);
break;
case Opcodes.PUTFIELD:
pop(stringArg);
pop();
break;
case Opcodes.NEW:
push(labels.get(0));
break;
case Opcodes.NEWARRAY:
pop();
switch (intArg) {
case Opcodes.T_BOOLEAN:
pushDescriptor("[Z");
break;
case Opcodes.T_CHAR:
pushDescriptor("[C");
break;
case Opcodes.T_BYTE:
pushDescriptor("[B");
break;
case Opcodes.T_SHORT:
pushDescriptor("[S");
break;
case Opcodes.T_INT:
pushDescriptor("[I");
break;
case Opcodes.T_FLOAT:
pushDescriptor("[F");
break;
case Opcodes.T_DOUBLE:
pushDescriptor("[D");
break;
case Opcodes.T_LONG:
pushDescriptor("[J");
break;
default:
throw new IllegalArgumentException("Invalid array type " + intArg);
}
break;
case Opcodes.ANEWARRAY:
pop();
pushDescriptor("[" + Type.getObjectType(stringArg));
break;
case Opcodes.CHECKCAST:
pop();
pushDescriptor(Type.getObjectType(stringArg).getDescriptor());
break;
case Opcodes.MULTIANEWARRAY:
pop(intArg);
pushDescriptor(stringArg);
break;
default:
throw new IllegalArgumentException("Invalid opcode " + opcode);
}
labels = null;
}
}
