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Issue #72 ternar operator fix

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AS3: chained assignments deobfuscation fix
This commit is contained in:
Jindra Petk
2013-04-13 09:46:16 +02:00
parent 08e5939e05
commit 7e081b1ba5
18 changed files with 136 additions and 4 deletions
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59
trunk/src/com/jpexs/decompiler/flash/abc/avm2/AVM2Code.java
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@@ -2414,7 +2414,7 @@ public class AVM2Code implements Serializable {
private static int removeTraps(boolean secondPass, boolean useVisited, List localData, Stack<GraphTargetItem> stack, List<GraphTargetItem> output, AVM2GraphSource code, int ip, int lastIp, List<Integer> visited, HashMap<GraphSourceItem, Decision> decisions) {
boolean debugMode = false;
int ret = 0;
while ((ip > -1) && ip < code.size()) {
iploop:while ((ip > -1) && ip < code.size()) {
if (useVisited && visited.contains(ip)) {
break;
}
@@ -2430,6 +2430,60 @@ public class AVM2Code implements Serializable {
if (debugMode) {
System.out.println((useVisited ? "useV " : "") + "Visit " + ip + ": " + ins + " stack:" + Highlighting.stripHilights(stack.toString()));
}
AVM2Instruction ains=(AVM2Instruction)ins;
if (ains.definition instanceof DupIns) {
do {
AVM2Instruction insAfter = (AVM2Instruction)code.get(ip + 1);
if (insAfter.definition instanceof ConvertBIns) { //SWF compiled with debug contain convert_b
ip++;
insAfter = (AVM2Instruction)code.get(ip + 1);
}
if (insAfter.definition instanceof SetLocalTypeIns) {
//chained assignments
int reg = (((SetLocalTypeIns) insAfter.definition).getRegisterId(insAfter));
for (int t = ip + 1; t < code.size(); t++) {
if (((AVM2Instruction)code.get(t)).definition instanceof KillIns) {
if (((AVM2Instruction)code.get(t)).operands[0] == reg) {
break;
}
}
if (((AVM2Instruction)code.get(t)).definition instanceof GetLocalTypeIns) {
if (((GetLocalTypeIns) ((AVM2Instruction)code.get(t)).definition).getRegisterId((AVM2Instruction)code.get(t)) == reg) {
if (((AVM2Instruction)code.get(t + 1)).definition instanceof KillIns) {
if (((AVM2Instruction)code.get(t + 1)).operands[0] == reg) {
code.getCode().initToSource();
ConvertOutput assignment = code.getCode().toSourceOutput(false, (Boolean)localData.get(0), (Integer)localData.get(1), (HashMap<Integer, GraphTargetItem>)localData.get(2), stack, (Stack<GraphTargetItem>)localData.get(3), (ABC)localData.get(7), (ConstantPool)localData.get(4), (MethodInfo[])localData.get(5), (MethodBody)localData.get(6), ip + 2, t - 1, (HashMap<Integer, String>)localData.get(8), (List<String>)localData.get(9), null);
stack.push(assignment.output.remove(assignment.output.size() - 1));
ip = t + 2;
continue iploop;
}
}
}
}
}
if (!code.getCode().isKilled(reg, 0, code.size()-1)) {
for (int i = ip; i >= 0; i--) {
if (((AVM2Instruction)code.get(i)).definition instanceof DupIns) {
GraphTargetItem v = stack.pop();
stack.push(new LocalRegTreeItem((AVM2Instruction)ins, reg, v));
stack.push(v);
} else {
break;
}
}
} else {
break;
}
ip++;
continue iploop;
//}
} else {
break;
}
} while (((AVM2Instruction)ins).definition instanceof DupIns);
}
if ((ins instanceof AVM2Instruction) && (((AVM2Instruction) ins).definition instanceof NewFunctionIns)) {
stack.push(new BooleanTreeItem(null, true));
} else {
@@ -2439,10 +2493,11 @@ public class AVM2Code implements Serializable {
break;
}
if (ins.isBranch() || ins.isJump()) {
List<Integer> branches = ins.getBranches(code);
if ((ins instanceof AVM2Instruction) && ((AVM2Instruction) ins).definition instanceof IfTypeIns
&& (!(((AVM2Instruction) ins).definition instanceof JumpIns)) && (!stack.isEmpty()) && (stack.peek().isCompileTime())) {
&& (!(((AVM2Instruction) ins).definition instanceof JumpIns)) && (!stack.isEmpty()) && (stack.peek().isCompileTime())&&(!stack.peek().hasSideEffect())) {
boolean condition = stack.peek().toBoolean();
if (debugMode) {
if (condition) {