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1082 lines (927 loc) · 41.3 KB
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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation, these intellectual property
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
* more additional patents or pending patent applications in the U.S. and in other countries.
*
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
* supplements.
*
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
* U.S. and other countries.
*
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
* Company, Ltd.
*/
package com.sun.max.tele.interpreter;
import static com.sun.cri.bytecode.Bytecodes.*;
import static com.sun.cri.bytecode.Bytecodes.UnsignedComparisons.*;
import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import com.sun.cri.bytecode.*;
import com.sun.max.lang.*;
import com.sun.max.program.*;
import com.sun.max.tele.*;
import com.sun.max.tele.reference.*;
import com.sun.max.tele.value.*;
import com.sun.max.unsafe.*;
import com.sun.max.vm.actor.holder.*;
import com.sun.max.vm.actor.member.*;
import com.sun.max.vm.bytecode.*;
import com.sun.max.vm.classfile.constant.*;
import com.sun.max.vm.cps.ir.*;
import com.sun.max.vm.cps.ir.interpreter.*;
import com.sun.max.vm.hosted.*;
import com.sun.max.vm.layout.*;
import com.sun.max.vm.reference.*;
import com.sun.max.vm.runtime.*;
import com.sun.max.vm.type.*;
import com.sun.max.vm.value.*;
/**
* Entry points and utility functions for the interpreter.
*
* @author Athul Acharya
* @author Doug Simon
*/
public final class TeleInterpreter {
private final TeleVM teleVM;
private Machine machine;
private Value returnValue;
public TeleInterpreter(TeleVM teleVM) {
this.teleVM = teleVM;
}
/**
* Creates an interpreter instance and uses it to execute a given method with the given arguments.
* Note that arguments must be dynamic types seen by the JavaPrototyper as legitimate VM classes.
*
* @param teleVM the remote VM
* @param classMethodActor the method to be executed
* @param args the arguments to passed to the method for execution
* @return the result of the execution
* @throws TeleInterpreterException if an uncaught exception occurs during execution of the method
*/
public static Value execute(TeleVM teleVM, ClassMethodActor classMethodActor, Value... args) throws TeleInterpreterException {
return new TeleInterpreter(teleVM).run(classMethodActor, args);
}
private Value run(ClassMethodActor classMethodActor, Value... arguments) throws TeleInterpreterException {
machine = new Machine(teleVM);
machine.pushFrame(classMethodActor);
int j = 0;
for (int i = 0; i < arguments.length; i++, j++) {
setLocal(j, arguments[i]);
if (arguments[i].isCategory2()) {
j++;
}
}
int opcode;
MethodStatus status;
while (true) {
opcode = machine.readOpcode();
try {
boolean isWide = false;
if (opcode == WIDE) {
opcode = machine.readOpcode();
isWide = true;
}
status = interpret(opcode, isWide);
if (status == MethodStatus.METHOD_END) {
break;
}
} catch (TeleInterpreterException executionException) {
ReferenceValue throwableReference = executionException.throwableReference();
boolean handled = machine.handleException(throwableReference); //if this succeeds we keep looping
if (!handled) {
throw executionException;
}
} catch (Throwable throwable) {
ReferenceValue throwableReference = ReferenceValue.from(throwable);
boolean handled = machine.handleException(throwableReference); //if this succeeds we keep looping
if (!handled) {
throw new TeleInterpreterException(throwable, machine);
}
}
}
if (returnValue instanceof TeleReferenceValue) {
returnValue = TeleReferenceValue.from(teleVM, machine.makeLocalReference((TeleReference) returnValue.asReference()));
}
Kind resultKind = classMethodActor.resultKind();
if (resultKind.stackKind == Kind.INT) {
returnValue = resultKind.convert(returnValue);
}
return returnValue;
}
private Value pop() {
return machine.pop();
}
private Value popCheckZero() throws TeleInterpreterException {
Value value = machine.pop();
if (value.isZero()) {
machine.raiseException(new ArithmeticException("Division by zero"));
}
return value;
}
private void push(Value value) {
machine.push(value);
}
private void jumpIf(boolean condition, int offset) {
if (condition) {
machine.jump(offset);
}
}
private void push(int value) {
push(IntValue.from(value));
}
private void setLocal(int index, Value value) {
machine.setLocal(index, value);
}
private Value local(int index) {
return machine.getLocal(index);
}
private short readS2() {
return machine.readShort();
}
private byte readS1() {
return machine.readByte();
}
private int readU2() {
return machine.readShort() & 0xffff;
}
private int readU1() {
return machine.readByte() & 0xff;
}
private void arrayLoad(Kind kind) throws TeleInterpreterException {
int index = machine.pop().asInt();
Reference array = machine.pop().asReference();
if (array.isZero()) {
machine.raiseException(new NullPointerException());
}
if (Layout.readArrayLength(array) <= index || index < 0) {
machine.raiseException(new ArrayIndexOutOfBoundsException());
}
switch (kind.asEnum) {
// Checkstyle: stop
case BYTE:
if (machine.toReferenceValue(array).getClassActor() == ClassRegistry.BOOLEAN_ARRAY) {
push(Layout.getBoolean(array, index) ? IntValue.ONE : IntValue.ZERO);
} else {
push(IntValue.from(Layout.getByte(array, index)));
}
break;
case CHAR: push(IntValue.from(Layout.getChar(array, index))); break;
case SHORT: push(IntValue.from(Layout.getShort(array, index))); break;
case INT: push(IntValue.from(Layout.getInt(array, index))); break;
case LONG: push(LongValue.from(Layout.getLong(array, index))); break;
case FLOAT: push(FloatValue.from(Layout.getFloat(array, index))); break;
case DOUBLE: push(DoubleValue.from(Layout.getDouble(array, index))); break;
case REFERENCE: push(machine.toReferenceValue(Layout.getReference(array, index))); break;
default: machine.raiseException(new ClassFormatError("Invalid array kind: " + kind));
// Checkstyle: resume
}
}
private void arrayStore(Kind kind) throws TeleInterpreterException {
Value val = pop();
int index = pop().toInt();
Reference array = pop().asReference();
if (array.isZero()) {
machine.raiseException(new NullPointerException());
}
if (Layout.readArrayLength(array) <= index || index < 0) {
machine.raiseException(new ArrayIndexOutOfBoundsException());
}
switch (kind.asEnum) {
// Checkstyle: stop
case BYTE: Layout.setByte(array, index, val.toByte()); break;
case CHAR: Layout.setChar(array, index, val.toChar()); break;
case SHORT: Layout.setShort(array, index, val.toShort()); break;
case INT: Layout.setInt(array, index, val.toInt()); break;
case LONG: Layout.setLong(array, index, val.toLong()); break;
case FLOAT: Layout.setFloat(array, index, val.toFloat()); break;
case DOUBLE: Layout.setDouble(array, index, val.toDouble()); break;
case REFERENCE: Layout.setReference(array, index, val.asReference()); break;
default: machine.raiseException(new ClassFormatError("Invalid array kind: " + kind));
// Checkstyle: resume
}
}
private int minus1IfWordWidth(int bitPosition) {
return bitPosition == Word.widthValue().numberOfBits ? -1 : bitPosition;
}
private MethodStatus interpret(int opcode, boolean isWide) throws Throwable {
switch (opcode) {
// Checkstyle: stop
case NOP: break;
case ACONST_NULL: push(ReferenceValue.NULL); break;
case ICONST_M1: push(IntValue.from(-1)); break;
case ICONST_0: push(IntValue.ZERO); break;
case ICONST_1: push(IntValue.ONE); break;
case ICONST_2: push(IntValue.TWO); break;
case ICONST_3: push(IntValue.THREE); break;
case ICONST_4: push(IntValue.FOUR); break;
case ICONST_5: push(IntValue.FIVE); break;
case LCONST_0: push(LongValue.ZERO); break;
case LCONST_1: push(LongValue.ONE); break;
case FCONST_0: push(FloatValue.ZERO); break;
case FCONST_1: push(FloatValue.ONE); break;
case FCONST_2: push(FloatValue.TWO); break;
case DCONST_0: push(DoubleValue.ZERO); break;
case DCONST_1: push(DoubleValue.ONE); break;
case BIPUSH: push(IntValue.from(readS1())); break;
case SIPUSH: push(IntValue.from(readS2())); break;
case LDC: push(machine.resolveConstantReference(readU1())); break;
case LDC_W:
case LDC2_W: push(machine.resolveConstantReference(readU2())); break;
case ILOAD:
case LLOAD:
case FLOAD:
case DLOAD:
case WLOAD:
case ALOAD: push(local(isWide ? readU2() : readU1())); break;
case ILOAD_0:
case ILOAD_1:
case ILOAD_2:
case ILOAD_3: push(local(opcode - ILOAD_0)); break;
case LLOAD_0:
case LLOAD_1:
case LLOAD_2:
case LLOAD_3: push(local(opcode - LLOAD_0)); break;
case FLOAD_0:
case FLOAD_1:
case FLOAD_2:
case FLOAD_3: push(local(opcode - FLOAD_0)); break;
case DLOAD_0:
case DLOAD_1:
case DLOAD_2:
case DLOAD_3: push(local(opcode - DLOAD_0)); break;
case ALOAD_0:
case ALOAD_1:
case ALOAD_2:
case ALOAD_3: push(local(opcode - ALOAD_0)); break;
case IALOAD: arrayLoad(Kind.INT); break;
case LALOAD: arrayLoad(Kind.LONG); break;
case FALOAD: arrayLoad(Kind.FLOAT); break;
case DALOAD: arrayLoad(Kind.DOUBLE); break;
case AALOAD: arrayLoad(Kind.REFERENCE); break;
case BALOAD: arrayLoad(Kind.BYTE); break;
case CALOAD: arrayLoad(Kind.CHAR); break;
case SALOAD: arrayLoad(Kind.SHORT); break;
case ISTORE:
case LSTORE:
case FSTORE:
case DSTORE:
case ASTORE: setLocal(isWide ? readU2() : readU1(), pop()); break;
case ISTORE_0:
case ISTORE_1:
case ISTORE_2:
case ISTORE_3: setLocal(opcode - ISTORE_0, pop()); break;
case LSTORE_0:
case LSTORE_1:
case LSTORE_2:
case LSTORE_3: setLocal(opcode - LSTORE_0, pop()); break;
case FSTORE_0:
case FSTORE_1:
case FSTORE_2:
case FSTORE_3: setLocal(opcode - FSTORE_0, pop()); break;
case DSTORE_0:
case DSTORE_1:
case DSTORE_2:
case DSTORE_3: setLocal(opcode - DSTORE_0, pop()); break;
case ASTORE_0:
case ASTORE_1:
case ASTORE_2:
case ASTORE_3: setLocal(opcode - ASTORE_0, pop()); break;
case IASTORE: arrayStore(Kind.INT); break;
case LASTORE: arrayStore(Kind.LONG); break;
case FASTORE: arrayStore(Kind.FLOAT); break;
case DASTORE: arrayStore(Kind.DOUBLE); break;
case AASTORE: arrayStore(Kind.REFERENCE); break;
case BASTORE: arrayStore(Kind.BYTE); break;
case CASTORE: arrayStore(Kind.CHAR); break;
case SASTORE: arrayStore(Kind.SHORT); break;
case POP: pop(); break;
case POP2: if (!pop().isCategory2()) pop(); break;
case DUP:
push(machine.peek());
break;
case DUP_X1: {
Value s1 = pop();
Value s2 = pop();
push(s1);
push(s2);
push(s1);
break;
}
case DUP_X2: {
Value s1 = pop();
Value s2 = pop();
if (s2.isCategory2()) {
push(s1);
push(s2);
push(s1);
} else {
Value s3 = pop();
push(s1);
push(s3);
push(s2);
push(s1);
}
break;
}
case DUP2: {
Value s1 = pop();
if (s1.isCategory2()) {
push(s1);
push(s1);
} else {
Value s2 = pop();
push(s2);
push(s1);
push(s2);
push(s1);
}
break;
}
case DUP2_X1: {
Value s1 = pop();
if (s1.isCategory2()) {
Value s2 = pop();
push(s1);
push(s2);
push(s1);
} else {
Value s2 = pop();
Value s3 = pop();
push(s2);
push(s1);
push(s3);
push(s2);
push(s1);
}
break;
}
case DUP2_X2: {
Value s1 = pop();
if (s1.isCategory2()) {
Value s2 = pop();
if (s2.isCategory2()) {
push(s1);
push(s2);
push(s1);
} else {
Value s3 = pop();
push(s1);
push(s3);
push(s2);
push(s1);
}
} else {
Value s2 = pop();
Value s3 = pop();
if (s3.isCategory2()) {
push(s2);
push(s1);
push(s3);
push(s2);
push(s1);
} else {
Value s4 = pop();
push(s2);
push(s1);
push(s4);
push(s3);
push(s2);
push(s1);
}
}
break;
}
case SWAP: {
Value s1 = pop();
Value s2 = pop();
push(s1);
push(s2);
break;
}
case IADD: push(IntValue.from(pop().asInt() + pop().asInt())); break;
case LADD: push(LongValue.from(pop().asLong() + pop().asLong())); break;
case FADD: push(FloatValue.from(pop().asFloat() + pop().asFloat())); break;
case DADD: push(DoubleValue.from(pop().asDouble() + pop().asDouble())); break;
case ISUB: push(IntValue.from(-pop().asInt() + pop().asInt())); break;
case LSUB: push(LongValue.from(-pop().asLong() + pop().asLong())); break;
case FSUB: push(FloatValue.from(-pop().asFloat() + pop().asFloat())); break;
case DSUB: push(DoubleValue.from(-pop().asDouble() + pop().asDouble())); break;
case IMUL: push(IntValue.from(pop().asInt() * pop().asInt())); break;
case LMUL: push(LongValue.from(pop().asLong() * pop().asLong())); break;
case FMUL: push(FloatValue.from(pop().asFloat() * pop().asFloat())); break;
case DMUL: push(DoubleValue.from(pop().asDouble() * pop().asDouble())); break;
case IDIV: { int v2 = popCheckZero().asInt(); push(IntValue.from(pop().asInt() / v2)); break; }
case LDIV: { long v2 = popCheckZero().asLong(); push(LongValue.from(pop().asLong() / v2)); break; }
case FDIV: { float v2 = popCheckZero().asFloat(); push(FloatValue.from(pop().asFloat() / v2)); break; }
case DDIV: { double v2 = popCheckZero().asDouble(); push(DoubleValue.from(pop().asDouble() / v2)); break; }
case IREM: { int v2 = popCheckZero().asInt(); push(IntValue.from(pop().asInt() % v2)); break; }
case LREM: { long v2 = popCheckZero().asLong(); push(LongValue.from(pop().asLong() % v2)); break; }
case FREM: { float v2 = popCheckZero().asFloat(); push(FloatValue.from(pop().asFloat() % v2)); break; }
case DREM: { double v2 = popCheckZero().asDouble(); push(DoubleValue.from(pop().asDouble() % v2)); break; }
case INEG: push(IntValue.from(0 - pop().asInt())); break;
case LNEG: push(LongValue.from(0 - pop().asLong())); break;
case FNEG: push(FloatValue.from((float) 0.0 - pop().asFloat())); break;
case DNEG: push(DoubleValue.from(0.0 - pop().asDouble())); break;
case ISHL: { int amount = pop().asInt(); int value = pop().asInt(); push(IntValue.from(value << (amount & 0x1F))); break; }
case LSHL: { int amount = pop().asInt(); long value = pop().asLong(); push(LongValue.from(value << (amount & 0x3F))); break; }
case ISHR: { int amount = pop().asInt(); int value = pop().asInt(); push(IntValue.from(value >> (amount & 0x1F))); break; }
case LSHR: { int amount = pop().asInt(); long value = pop().asLong(); push(LongValue.from(value >> (amount & 0x3F))); break; }
case IUSHR: { int amount = pop().asInt(); int value = pop().asInt(); push(IntValue.from(value >>> (amount & 0x1F))); break; }
case LUSHR: { int amount = pop().asInt(); long value = pop().asLong(); push(LongValue.from(value >>> (amount & 0x3F))); break; }
case IAND: push(IntValue.from(pop().asInt() & pop().asInt())); break;
case LAND: push(LongValue.from(pop().asLong() & pop().asLong())); break;
case IOR: push(IntValue.from(pop().asInt() | pop().asInt())); break;
case LOR: push(LongValue.from(pop().asLong() | pop().asLong())); break;
case IXOR: push(IntValue.from(pop().asInt() ^ pop().asInt())); break;
case LXOR: push(LongValue.from(pop().asLong() ^ pop().asLong())); break;
case IINC: {
int index = isWide ? readU2() : readU1();
int increment = isWide ? readS2() : readS1();
int value = local(index).asInt();
setLocal(index, IntValue.from(value + increment));
break;
}
case I2L: push(LongValue.from(pop().asInt())); break;
case I2F: push(FloatValue.from(pop().asInt())); break;
case I2D: push(DoubleValue.from(pop().asInt())); break;
case L2I: push(IntValue.from((int) pop().asLong())); break;
case L2F: push(FloatValue.from(pop().asLong())); break;
case L2D: push(DoubleValue.from(pop().asLong())); break;
case F2I: push(IntValue.from((int) pop().asFloat())); break;
case F2L: push(LongValue.from((long) pop().asFloat())); break;
case F2D: push(DoubleValue.from(pop().asFloat())); break;
case D2I: push(IntValue.from((int) pop().asDouble())); break;
case D2L: push(LongValue.from((long) pop().asDouble())); break;
case D2F: push(FloatValue.from((float) pop().asDouble())); break;
case I2B: push(IntValue.from(pop().toByte())); break;
case I2C: push(IntValue.from(pop().toChar())); break;
case I2S: push(IntValue.from(pop().toShort())); break;
case LCMP: {
long right = pop().asLong();
long left = pop().asLong();
int result = (left < right) ? -1 : (left == right) ? 0 : 1;
push(IntValue.from(result));
break;
}
case FCMPL:
case FCMPG: {
float right = pop().asFloat();
float left = pop().asFloat();
int result = (left < right) ? -1 : (left == right) ? 0 : 1;
push(IntValue.from(result));
break;
}
case DCMPL:
case DCMPG: {
double right = pop().asDouble();
double left = pop().asDouble();
int result = (left < right) ? -1 : (left == right) ? 0 : 1;
push(IntValue.from(result));
break;
}
case IFEQ: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 == 0) {
machine.jump(offset);
}
break;
}
case IFNE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 != 0) {
machine.jump(offset);
}
break;
}
case IFLT: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 < 0) {
machine.jump(offset);
}
break;
}
case IFGE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 >= 0) {
machine.jump(offset);
}
break;
}
case IFGT: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 > 0) {
machine.jump(offset);
}
break;
}
case IFLE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
if (s1 <= 0) {
machine.jump(offset);
}
break;
}
case IF_ICMPEQ: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 == s1) {
machine.jump(offset);
}
break;
}
case IF_ICMPNE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 != s1) {
machine.jump(offset);
}
break;
}
case IF_ICMPLT: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 < s1) {
machine.jump(offset);
}
break;
}
case IF_ICMPGE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 >= s1) {
machine.jump(offset);
}
break;
}
case IF_ICMPGT: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 > s1) {
machine.jump(offset);
}
break;
}
case IF_ICMPLE: {
final short offset = readS2();
final int s1 = machine.pop().asInt();
final int s2 = machine.pop().asInt();
if (s2 <= s1) {
machine.jump(offset);
}
break;
}
case IF_ACMPEQ: {
final short offset = readS2();
final ReferenceValue s1 = (ReferenceValue) machine.pop();
final ReferenceValue s2 = (ReferenceValue) machine.pop();
if (s2.equals(s1)) {
machine.jump(offset);
}
break;
}
case IF_ACMPNE: {
final short offset = readS2();
final ReferenceValue s1 = (ReferenceValue) machine.pop();
final ReferenceValue s2 = (ReferenceValue) machine.pop();
if (!s2.equals(s1)) {
machine.jump(offset);
}
break;
}
case GOTO: {
final short offset = readS2();
machine.jump(offset);
break;
}
case JSR: {
short offset = readS2();
int returnPosition = machine.currentThread().frame().currentBytePosition();
push(IntValue.from(returnPosition));
machine.jump(offset);
break;
}
case RET: {
int index = isWide ? readU2() : readU1();
int value = local(index).asInt();
machine.currentThread().frame().setBytecodePosition(value);
break;
}
case TABLESWITCH: {
int index = pop().asInt();
machine.alignInstructionPosition();
int defawlt = machine.readInt();
int low = machine.readInt();
int high = machine.readInt();
if (index < low || index > high) {
machine.jump(defawlt);
} else {
int jumpTableIndex = index - low;
machine.skipBytes(jumpTableIndex * 4);
int offset = machine.readInt();
machine.jump(offset);
}
break;
}
case LOOKUPSWITCH: {
int key = pop().asInt();
machine.alignInstructionPosition();
int defawlt = machine.readInt();
int nPairs = machine.readInt();
boolean foundMatch = false;
for (int i = 0; i < nPairs; i++) {
int value = machine.readInt();
int offset = machine.readInt();
if (value == key) {
machine.jump(offset);
foundMatch = true;
break;
}
}
if (!foundMatch) {
machine.jump(defawlt);
}
break;
}
case IRETURN:
case LRETURN:
case FRETURN:
case DRETURN:
case ARETURN: {
Value result = pop();
ExecutionFrame frame = machine.popFrame();
//if this was the topmost frame on the stack
if (frame == null) {
returnValue = result;
return MethodStatus.METHOD_END;
}
push(result);
break;
}
case RETURN: {
ExecutionFrame frame = machine.popFrame();
if (frame == null) {
returnValue = VoidValue.VOID;
return MethodStatus.METHOD_END;
}
break;
}
case GETSTATIC: push(machine.getStatic(readU2())); break;
case PUTSTATIC: machine.putStatic(readU2(), pop()); break;
case GETFIELD: push(machine.getField(pop().asReference(), readU2())); break;
case PUTFIELD: {
Value value = pop();
Object instance = pop().asBoxedJavaValue();
machine.putField(instance, readU2(), value);
break;
}
case INVOKEVIRTUAL: {
int cpIndex = readU2();
ClassMethodActor resolveMethod = (ClassMethodActor) machine.resolveMethod(cpIndex);
ClassMethodActor methodActor = resolveMethod;
Value value = machine.peek(methodActor.descriptor().numberOfParameters() + 1);
if (value instanceof ReferenceValue) {
ReferenceValue receiver = (ReferenceValue) value;
if (receiver.isZero()) {
machine.raiseException(new NullPointerException());
}
ClassActor dynamicClass = receiver.getClassActor();
assert dynamicClass != null;
methodActor = dynamicClass.findVirtualMethodActor(methodActor);
}
if (methodActor == null) {
ReferenceValue receiver = (ReferenceValue) value;
ClassActor dynamicClass = receiver.getClassActor();
methodActor = dynamicClass.findVirtualMethodActor(methodActor);
machine.raiseException(new AbstractMethodError());
} else if (methodActor.isAbstract()) {
machine.raiseException(new AbstractMethodError());
}
machine.invokeMethod(methodActor);
break;
}
case INVOKESPECIAL: {
int cpIndex = readU2();
ClassMethodActor methodActor = (ClassMethodActor) machine.resolveMethod(cpIndex);
Value receiver = machine.peek(methodActor.descriptor().numberOfParameters() + 1);
if (receiver.isZero() && receiver instanceof ReferenceValue) {
machine.raiseException(new NullPointerException());
}
machine.invokeMethod(methodActor);
break;
}
case INVOKESTATIC: {
int cpIndex = readU2();
ClassMethodActor methodActor = (ClassMethodActor) machine.resolveMethod(cpIndex);
machine.invokeMethod(methodActor);
break;
}
case INVOKEINTERFACE: {
int cpIndex = readU2();
readU2();
InterfaceMethodActor methodActor = (InterfaceMethodActor) machine.resolveMethod(cpIndex);
ReferenceValue receiver = (ReferenceValue) machine.peek(methodActor.descriptor().numberOfParameters() + 1);
if (receiver.isZero()) {
machine.raiseException(new NullPointerException());
}
ClassActor dynamicClass = receiver.getClassActor();
assert dynamicClass != null;
if (!dynamicClass.getAllInterfaceActors().contains((InterfaceActor) methodActor.holder())) {
machine.raiseException(new IncompatibleClassChangeError(dynamicClass + " does not implement " + methodActor.holder()));
}
VirtualMethodActor dynamicMethodActor = dynamicClass.findVirtualMethodActor(methodActor);
if (dynamicMethodActor == null) {
machine.raiseException(new AbstractMethodError("No such method " + methodActor + " found in " + dynamicClass));
} else if (dynamicMethodActor.isAbstract()) {
machine.raiseException(new AbstractMethodError("Method " + dynamicMethodActor + " is abstract in " + dynamicClass));
} else if (!dynamicMethodActor.isPublic()) {
machine.raiseException(new IllegalAccessError("Method " + dynamicMethodActor + " is not public in " + dynamicClass));
}
machine.invokeMethod(dynamicMethodActor);
break;
}
case NEW: {
int cpIndex = readU2();
ClassActor classActor = machine.resolveClassReference(cpIndex);
push(ReferenceValue.from(Objects.allocateInstance(classActor.toJava())));
break;
}
case NEWARRAY: {
int arrayType = readU1();
int arraySize = pop().asInt();
if (arraySize < 0) {
machine.raiseException(new NegativeArraySizeException());
}
switch (arrayType) {
case 4:
push(ReferenceValue.from(new boolean[arraySize]));
break;
case 5:
push(ReferenceValue.from(new char[arraySize]));
break;
case 6:
push(ReferenceValue.from(new float[arraySize]));
break;
case 7:
push(ReferenceValue.from(new double[arraySize]));
break;
case 8:
push(ReferenceValue.from(new byte[arraySize]));
break;
case 9:
push(ReferenceValue.from(new short[arraySize]));
break;
case 10:
push(ReferenceValue.from(new int[arraySize]));
break;
case 11:
push(ReferenceValue.from(new long[arraySize]));
break;
}
break;
}
case ANEWARRAY: {
int cpIndex = readU2();
int arraySize = pop().asInt();
ClassActor classActor = machine.resolveClassReference(cpIndex);
if (arraySize < 0) {
machine.raiseException(new NegativeArraySizeException());
}
push(ReferenceValue.from(Array.newInstance(classActor.toJava(), arraySize)));
break;
}
case ARRAYLENGTH: {
Reference array = pop().asReference();
if (array.isZero()) {
machine.raiseException(new NullPointerException());
}
push(IntValue.from(Layout.readArrayLength(array)));
break;
}
case ATHROW: {
ReferenceValue t = (ReferenceValue) pop();
if (t.isZero()) {
throw new NullPointerException();
} else {
throw machine.raiseException(t);
}
}
case CHECKCAST: {
int cpIndex = readU2();
ClassActor classActor = machine.resolveClassReference(cpIndex);
ReferenceValue object = (ReferenceValue) pop();
if (!object.isZero()) {
if (!classActor.isAssignableFrom(object.getClassActor())) {
String message = object.getClassActor().toJava() + " is not a subclass of " + classActor;
machine.raiseException(new ClassCastException(message));
}
}
push(object);
break;
}
case INSTANCEOF: {
int cpIndex = readU2();
ClassActor classActor = machine.resolveClassReference(cpIndex);
ReferenceValue object = (ReferenceValue) pop();
if (object.isZero() || !classActor.isAssignableFrom(object.getClassActor())) {
push(IntValue.from(0));
} else {
push(IntValue.from(1));
}
break;
}
case MONITORENTER:
case MONITOREXIT:
pop();
break;
case MULTIANEWARRAY: {
int cpIndex = readU2();
ClassActor arrayClassActor = machine.resolveClassReference(cpIndex);
int lengthsCount = (short) (readS1() & 0x7F);
if (lengthsCount < 1) {