protected boolean removeZeroJumps(AVM2Code code, MethodBody body) throws InterruptedException {
boolean result = false;
for (int i = 0; i < code.code.size(); i++) {
AVM2Instruction ins = code.code.get(i);
if (ins.definition instanceof JumpIns) {
if (ins.operands[0] == 0) {
if (Thread.currentThread().isInterrupted()) {
throw new InterruptedException();
}
code.removeInstruction(i, body);
i--;
result = true;
}
}
}
return result;
}
private boolean executeInstructions(
Map<Integer, Object> staticRegs,
MethodBody body,
ABC abc,
AVM2Code code,
LocalDataArea localData,
int idx,
int endIdx,
ExecutionResult result,
AVM2Instruction inlineIns)
throws InterruptedException {
int instructionsProcessed = 0;
FixItemCounterStack stack = (FixItemCounterStack) localData.operandStack;
Set<Long> refs = code.getImportantOffsets(body);
boolean modified = false;
while (true) {
if (idx > endIdx) {
break;
}
if (instructionsProcessed > executionLimit) {
break;
}
AVM2Instruction ins = code.code.get(idx);
if (instructionsProcessed > 0 && refs.contains(ins.getOffset())) {
break;
}
modified = modified | code.inlineJumpExit();
InstructionDefinition def = ins.definition;
if (inlineIns == ins) {
if (def instanceof SetLocalTypeIns) {
int regId = ((SetLocalTypeIns) def).getRegisterId(ins);
staticRegs.put(regId, localData.localRegisters.get(regId));
code.replaceInstruction(
idx, new AVM2Instruction(0, DeobfuscatePopIns.getInstance(), null), body);
modified = true;
}
}
if (def instanceof GetLocalTypeIns) {
int regId = ((GetLocalTypeIns) def).getRegisterId(ins);
if (staticRegs.containsKey(regId)) {
AVM2Instruction pushins = abc.constants.makePush(staticRegs.get(regId));
if (pushins == null) {
break;
}
code.replaceInstruction(idx, pushins, body);
modified = true;
ins = pushins;
def = ins.definition;
}
}
if (def instanceof NewFunctionIns
&& idx + 1 < code.code.size()
&& code.code.get(idx + 1).definition instanceof PopIns) {
code.removeInstruction(idx + 1, body);
code.removeInstruction(idx, body);
modified = true;
continue;
}
boolean ok = false;
// todo: honfika: order by statistics
if (def.isNotCompileTimeSupported()
|| def instanceof PushByteIns
|| def instanceof PushShortIns
|| def instanceof PushIntIns
|| def instanceof PushDoubleIns
|| def instanceof PushStringIns
|| def instanceof PushNullIns
|| def instanceof PushUndefinedIns
|| def instanceof PushFalseIns
|| def instanceof PushTrueIns
|| def instanceof DupIns
|| def instanceof SwapIns
|| def instanceof AddIns
|| def instanceof AddIIns
|| def instanceof SubtractIns
|| def instanceof SubtractIIns
|| def instanceof ModuloIns
|| def instanceof MultiplyIns
|| def instanceof MultiplyIIns //
|| def instanceof DivideIns //
|| def instanceof BitAndIns
|| def instanceof BitXorIns
|| def instanceof BitOrIns
|| def instanceof LShiftIns
|| def instanceof RShiftIns
|| def instanceof URShiftIns
|| def instanceof EqualsIns
|| def instanceof NotIns
|| def instanceof NegateIns //
|| def instanceof NegateIIns //
|| def instanceof IncrementIns //
|| def instanceof IncrementIIns //
|| def instanceof DecrementIns //
|| def instanceof DecrementIIns //
|| def instanceof IfTypeIns
|| def instanceof JumpIns
|| def instanceof EqualsIns
|| def instanceof LessEqualsIns
|| def instanceof GreaterEqualsIns
|| def instanceof GreaterThanIns
|| def instanceof LessThanIns
|| def instanceof StrictEqualsIns
|| def instanceof PopIns
|| def instanceof GetLocalTypeIns
|| def instanceof SetLocalTypeIns
|| def instanceof NewFunctionIns
|| def instanceof CoerceOrConvertTypeIns) {
ok = true;
}
if (!ok) {
break;
}
if (!(def instanceof NewFunctionIns)) {
// do not throw EmptyStackException, much faster
int requiredStackSize = def.getStackPopCount(ins, abc);
if (stack.size() < requiredStackSize) {
break;
}
if (requiredStackSize > 0 && !def.isNotCompileTimeSupported()) {
boolean notCompileTime = false;
for (int i = 0; i < requiredStackSize; i++) {
if (stack.peek(i + 1) == NotCompileTime.INSTANCE) {
notCompileTime = true;
break;
}
}
if (notCompileTime) {
break;
}
}
if (localData.scopeStack.size() < -def.getScopeStackDelta(ins, abc)) {
break;
}
boolean supported;
try {
localData.jump = null;
supported = def.execute(localData, abc.constants, ins);
} catch (AVM2ExecutionException ex) {
supported = false;
}
if (!supported) {
break;
}
}
boolean ifed = false;
if (def instanceof IfTypeIns && !(def instanceof JumpIns)) {
long address = ins.getTargetAddress();
int nidx = code.adr2pos(address);
AVM2Instruction tarIns = code.code.get(nidx);
// Some IfType instructions need more than 1 operand, we must pop out all of them
int stackCount = -def.getStackDelta(ins, abc);
if (localData.jump != null) {
// System.err.println("replacing " + ins + " on " + idx + " with jump");
AVM2Instruction jumpIns = new AVM2Instruction(0, AVM2Instructions.Jump, new int[] {0});
// jumpIns.operands[0] = ins.operands[0] /*- ins.getBytes().length*/ +
// jumpIns.getBytes().length;
code.replaceInstruction(idx, jumpIns, body);
jumpIns.operands[0] =
(int) (tarIns.getOffset() - jumpIns.getOffset() - jumpIns.getBytesLength());
for (int s = 0; s < stackCount; s++) {
code.insertInstruction(
idx,
new AVM2Instruction(ins.getOffset(), DeobfuscatePopIns.getInstance(), null),
true,
body);
}
idx = code.adr2pos(jumpIns.getTargetAddress());
} else {
// System.err.println("replacing " + ins + " on " + idx + " with pop");
code.replaceInstruction(
idx,
new AVM2Instruction(ins.getOffset(), DeobfuscatePopIns.getInstance(), null),
body);
for (int s = 1 /*first is replaced*/; s < stackCount; s++) {
code.insertInstruction(
idx,
new AVM2Instruction(ins.getOffset(), DeobfuscatePopIns.getInstance(), null),
true,
body);
}
// ins.definition = DeobfuscatePopIns.getInstance();
idx++;
}
modified = true;
ifed = true;
} else {
idx++;
}
instructionsProcessed++;
if (result != null && stack.allItemsFixed()) {
result.idx = idx == code.code.size() ? idx - 1 : idx;
result.instructionsProcessed = instructionsProcessed;
result.stack.clear();
result.stack.addAll(stack);
}
if (ifed) {
break;
}
if (localData.jump != null) {
idx = code.adr2pos(localData.jump);
if (idx == -1) {
throw new TranslateException("Jump target not found: " + localData.jump);
}
}
}
return modified;
}