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Mapping packet handlers works some. Tried to add inlining of results of static methods. Doesnt work well because it inf loops so its disabled usually. I think instead I can track this separately on the stack context and fix resolve() to deal with it.

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This commit is contained in:
Adam
2016-02-27 11:38:44 -05:00
parent 83f338a2e9
commit 19f2807c86
8 changed files with 324 additions and 107 deletions
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34
src/main/java/net/runelite/deob/attributes/code/instructions/If.java
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@@ -18,7 +18,9 @@ import java.util.List;
import net.runelite.deob.Field;
import net.runelite.deob.attributes.code.instruction.types.GetFieldInstruction;
import net.runelite.deob.attributes.code.instruction.types.MappableInstruction;
import net.runelite.deob.attributes.code.instruction.types.PushConstantInstruction;
import net.runelite.deob.deobfuscators.rename.MappingExecutorUtil;
import net.runelite.deob.deobfuscators.rename.PacketHandler;
import net.runelite.deob.deobfuscators.rename.ParallelExecutorMapping;
import net.runelite.deob.execution.Execution;
@@ -196,8 +198,16 @@ public abstract class If extends Instruction implements JumpingInstruction, Comp
if (f1.packetHandler && f2.packetHandler)
{
mapping.packetHandler1.add(this);
mapping.packetHandler2.add((If) other.getInstruction());
int pc1 = this.getConstantInstruction(ctx),
pc2 = this.getConstantInstruction(other);
assert (pc1 != -1) == (pc2 != -1);
if (pc1 == -1 && pc2 == -1)
return;
mapping.packetHandler1.add(new PacketHandler(this, pc1));
mapping.packetHandler2.add(new PacketHandler((If) other.getInstruction(), pc2));
}
}
@@ -223,6 +233,26 @@ public abstract class If extends Instruction implements JumpingInstruction, Comp
return gfi.getMyField();
}
private Integer getConstantInstruction(InstructionContext ctx)
{
PushConstantInstruction gfi = null;
for (StackContext sctx : ctx.getPops())
{
InstructionContext base = MappingExecutorUtil.resolve(sctx.getPushed(), sctx);
if (base.getInstruction() instanceof PushConstantInstruction)
{
if (gfi != null)
return null;
gfi = (PushConstantInstruction) base.getInstruction();
}
}
return (Integer) gfi.getConstant().getObject();
}
protected boolean isSameField(InstructionContext thisIc, InstructionContext otherIc)
{

136
src/main/java/net/runelite/deob/deobfuscators/rename/MappingExecutorUtil.java
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@@ -90,9 +90,6 @@ public class MappingExecutorUtil
frame.other = frame2;
frame2.other = frame;
MethodContext ctx1 = frame.getMethodCtx(),
ctx2 = frame2.getMethodCtx();
ParallellMappingExecutor parallel = new ParallellMappingExecutor(e, e2);
ParallelExecutorMapping mappings = new ParallelExecutorMapping(m1.getMethods().getClassFile().getGroup(),
m2.getMethods().getClassFile().getGroup());
@@ -128,96 +125,79 @@ public class MappingExecutorUtil
p2.getFrame().stop();
e.paused = e2.paused = false;
continue;
// if (!hit)
// {
// hit = true;
//
// throw new MappingException();
// }
//
// System.out.println("ERROR mapping " + p1 + " to " + p2);
//
// // methods don't map. find common static method and back out.
//
// Frame c1 = p1.getFrame(), c2 = p2.getFrame();
//
// while (c1 != null && c1.otherStatic == null)
// c1 = c1.returnTo;
//
// while (c2 != null && c2.otherStatic == null)
// c2 = c2.returnTo;
//
// // otherStatic would point to the original frame of the method, which the other might not be. we don't
// // care just compare the method.
// if (c1 == null || c2 == null || c1.otherStatic.getMethod() != c2.getMethod() || c2.otherStatic.getMethod() != c1.getMethod())
// {
// throw new MappingException();
// }
//
// // c1/c2 are top frames of static methods that we can't map.
// // return out of frames
// c1 = c1.returnTo;
// c2 = c2.returnTo;
//
// if (c1 == null || c2 == null)
// throw new MappingException();
//
// // Back execution out to c1 and c2.
// // When something is stepped into, the calling frame is removed.
// // Remove all frames from the respective method, add frame from good method to continue
// parallel.removeFramesFromMethod(p1.getFrame().getMethod());
// parallel.removeFramesFromMethod(p2.getFrame().getMethod());
//
// assert c1.other == null;
// assert c2.other == null;
//
// c1.other = c2;
// c2.other = c1;
//
// parallel.addFrame(c1, c2);
// continue;
}
// try
// {
mi1.map(mappings, p1, p2);
// }
// catch (Throwable ex)
// {
// p1.getFrame().stop();
// p2.getFrame().stop();
// ex.printStackTrace();
// }
e.paused = e2.paused = false;
}
// if (mappings.getMap().isEmpty() == false)
// {
// checkReturns(m1, ctx1);
// }
return mappings;
}
private static boolean checkReturns(Method method, MethodContext ctx)
public static ParallelExecutorMapping mapFrame(ClassGroup group1, ClassGroup group2, Instruction i1, Instruction i2)
{
List<Instruction> ins = method.getCode().getInstructions().getInstructions().stream().filter(i -> i instanceof ReturnInstruction).collect(Collectors.toList());
List<Instruction> exc = ctx.instructions.stream().map(i -> i.getInstruction()).collect(Collectors.toList());
for (Instruction i : ins)
Execution e = new Execution(group1);
e.step = true;
Frame frame = new Frame(e, i1.getInstructions().getCode().getAttributes().getMethod(), i1);
//frame.initialize();
e.frames.add(frame);
Execution e2 = new Execution(group2);
e2.step = true;
//Frame frame2 = new Frame(e2, m2);
Frame frame2 = new Frame(e2, i2.getInstructions().getCode().getAttributes().getMethod(), i2);
//frame2.initialize();
e2.frames.add(frame2);
frame.other = frame2;
frame2.other = frame;
ParallellMappingExecutor parallel = new ParallellMappingExecutor(e, e2);
ParallelExecutorMapping mappings = new ParallelExecutorMapping(group1, group2);
//mappings.m1 = m1;
//mappings.m2 = m2;
parallel.mappings = mappings;
int compare = 0;
while (parallel.step())
{
if (!exc.contains(i))
// get what each frame is paused/exited on
InstructionContext p1 = parallel.getP1(), p2 = parallel.getP2();
assert e.paused;
assert e2.paused;
++compare;
//System.out.println(p1.getInstruction() + " <-> " + p2.getInstruction());
//assert p1.getInstruction().getInstructions().getCode().getAttributes().getMethod() == m1;
//assert p2.getInstruction().getInstructions().getCode().getAttributes().getMethod() == m2;
assert p1.getInstruction() instanceof MappableInstruction;
assert p2.getInstruction() instanceof MappableInstruction;
MappableInstruction mi1 = (MappableInstruction) p1.getInstruction(),
mi2 = (MappableInstruction) p2.getInstruction();
if (!mi1.isSame(p1, p2))
{
return false;
mappings.crashed = true;
mi1.isSame(p1, p2);
p1.getFrame().stop();
p2.getFrame().stop();
e.paused = e2.paused = false;
continue;
}
mi1.map(mappings, p1, p2);
e.paused = e2.paused = false;
}
return true;
return mappings;
}
//private static boolean containsMappableInstruction
public static boolean isMappable(InvokeInstruction ii)
{
String className;

57
src/main/java/net/runelite/deob/deobfuscators/rename/PacketHandler.java Normal file
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@@ -0,0 +1,57 @@
package net.runelite.deob.deobfuscators.rename;
import java.util.List;
import net.runelite.deob.attributes.code.Instruction;
import net.runelite.deob.attributes.code.instructions.If;
import net.runelite.deob.attributes.code.instructions.IfICmpEq;
import net.runelite.deob.attributes.code.instructions.IfICmpNe;
public class PacketHandler
{
private final If branchInstruction;
private final int packetId;
public PacketHandler(If branchInstruction, int packetId)
{
this.branchInstruction = branchInstruction;
this.packetId = packetId;
}
public If getBranchInstruction()
{
return branchInstruction;
}
public int getPacketId()
{
return packetId;
}
@Override
public String toString()
{
return "PacketHandler{" + "packetId=" + packetId + '}';
}
public Instruction getFirstInsOfHandler()
{
if (branchInstruction instanceof IfICmpNe)
{
List<Instruction> ins = branchInstruction.getInstructions().getInstructions();
int idx = ins.indexOf(branchInstruction);
assert idx != -1;
return ins.get(idx + 1);
}
else if (branchInstruction instanceof IfICmpEq)
{
List<Instruction> jumps = branchInstruction.getJumps();
assert jumps.size() == 1;
return jumps.get(0);
}
else
{
assert false;
return null;
}
}
}

20
src/main/java/net/runelite/deob/deobfuscators/rename/ParallelExecutorMapping.java
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@@ -16,8 +16,8 @@ public class ParallelExecutorMapping
//private List<Object> order = new ArrayList<>();
public Method m1, m2;
public boolean crashed;
public List<If> packetHandler1 = new ArrayList<>();
public List<If> packetHandler2 = new ArrayList<>();
public List<PacketHandler> packetHandler1 = new ArrayList<>();
public List<PacketHandler> packetHandler2 = new ArrayList<>();
public ParallelExecutorMapping(ClassGroup group, ClassGroup group2)
{
@@ -73,4 +73,20 @@ public class ParallelExecutorMapping
else
assert false;
}
public PacketHandler findPacketHandler1(int id)
{
for (PacketHandler p : this.packetHandler1)
if (p.getPacketId() == id)
return p;
return null;
}
public PacketHandler findPacketHandler2(int id)
{
for (PacketHandler p : this.packetHandler2)
if (p.getPacketId() == id)
return p;
return null;
}
}

29
src/main/java/net/runelite/deob/execution/Frame.java
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@@ -53,6 +53,22 @@ public class Frame
nonStatic = method;
}
public Frame(Execution execution, Method method, Instruction i)
{
this.execution = execution;
this.method = method;
Code code = method.getCode();
stack = new Stack(code.getMaxStack());
variables = new Variables(code.getMaxLocals());
ctx = new MethodContext(execution);
nonStatic = method;
cur = i;
}
@Override
public String toString()
{
@@ -113,8 +129,7 @@ public class Frame
Code code = method.getCode();
cur = code.getInstructions().getInstructions().get(0);
}
static List<Frame> ffs = new ArrayList();
protected Frame(Frame other)
{
iscopy=true;
@@ -127,21 +142,11 @@ public class Frame
this.ctx = other.ctx;
this.nonStatic = other.nonStatic;
this.caller = other.caller;
ffs.add(this);
if (ffs.size() == 10)
{
for (Frame f : ffs)
{
System.out.println(f.method);
}
int i = 5;
}
if (other.returnTo != null)
{
this.returnTo = new Frame(other.returnTo);
this.returnTo.instructions.addAll(other.returnTo.instructions);
}
ffs.remove(this);
this.created = other.created;
this.forking = other.forking;
this.otherStatic = other.otherStatic;

50
src/main/java/net/runelite/deob/execution/ParallellMappingExecutor.java
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@@ -1,5 +1,6 @@
package net.runelite.deob.execution;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
@@ -7,6 +8,7 @@ import java.util.stream.Collectors;
import net.runelite.deob.Method;
import net.runelite.deob.attributes.code.instruction.types.ReturnInstruction;
import net.runelite.deob.attributes.code.instructions.InvokeStatic;
import net.runelite.deob.attributes.code.instructions.Return;
import net.runelite.deob.deobfuscators.rename.MappingExecutorUtil;
import net.runelite.deob.deobfuscators.rename.ParallelExecutorMapping;
@@ -294,7 +296,9 @@ public class ParallellMappingExecutor
return f2;
}
public static boolean enable = false;
public static List<StackContext> returnStacks = new ArrayList<>();
private Frame popStack(Frame f)
{
Execution e = f.getExecution();
@@ -308,10 +312,54 @@ public class ParallellMappingExecutor
InstructionContext i = f.getInstructions().get(f.getInstructions().size() - 1);
if (!(i.getInstruction() instanceof ReturnInstruction))
return f;
StackContext returnValue = null;
if (enable&& i.getInstruction() instanceof Return)
{
assert i.getPops().size() == 1;
returnValue = i.getPops().get(0);
}
Frame r = popStackForce(f);
f.returnTo = null;
// last ins must be an invokestatic
InstructionContext i2 = r.getInstructions().get(r.getInstructions().size() - 1);
assert i2.getInstruction() instanceof InvokeStatic;
if (returnValue != null)
{
// if the function retunred something, we must have pushed
assert i2.getPushes().size() == 1;
StackContext invokePushed = i2.getPushes().get(0);
if (invokePushed.getPushed().getInstruction() != i2.getInstruction())
//if (!(invokePushed.getPushed().getInstruction() instanceof InvokeStatic))
{
return r;
}
//returnStacks.add(invokePushed);
returnStacks.add(returnValue);
boolean b = returnStacks.contains(invokePushed);
assert invokePushed.getPopped().isEmpty();
// replace invokePushed with returnValue?
i2.getPushes().remove(invokePushed);
i2.getPushes().add(returnValue);
//invokePushed.setpushed = null
Stack stack = r.getStack();
StackContext s = stack.pop();
assert s == invokePushed;
stack.push(returnValue);
//assert invokePushed.getPushed().getPushes().contains(invokePushed);
//invokePushed.getpu
}
// step return frame
//r.execute();

1
src/main/java/net/runelite/deob/execution/StackContext.java
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@@ -47,6 +47,7 @@ public class StackContext
public void addPopped(InstructionContext popped)
{
// assert ParallellMappingExecutor.returnStacks.contains(this) == false;
if (!this.poppeds.contains(popped))
this.poppeds.add(popped);
}