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Trying to fine tune stuff, found a *1 not removed which is messing with some stuff, added test

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This commit is contained in:
Adam
2015-10-23 12:04:23 -04:00
parent 85c49413dd
commit d4f40eaf03
2 changed files with 131 additions and 1 deletions
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31
src/main/java/net/runelite/deob/deobfuscators/arithmetic/ModArith.java
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@@ -93,6 +93,35 @@ public class ModArith implements Deobfuscator
return true;
}
}
else if (pushedsfi.getInstruction() instanceof IMul)
{
Instruction one = pushedsfi.getPops().get(0).getPushed().getInstruction();
Instruction two = pushedsfi.getPops().get(1).getPushed().getInstruction();
LDC_W pci = null;
Instruction other = null;
if (one instanceof LDC_W)
{
pci = (LDC_W) one;
other = two;
}
else if (two instanceof LDC_W)
{
pci = (LDC_W) two;
other = one;
}
if (pci != null
&& !(other instanceof GetFieldInstruction))
{
if (pci.getConstant().getObject() instanceof Integer)
{
int i = pci.getConstantAsInt();
if (DMath.isBig(i))
return true;
}
}
}
}
}
// field * imul
@@ -515,7 +544,7 @@ public class ModArith implements Deobfuscator
//getter -442113225
//setter -2129182073
if (f.getName().equals("field606"))
if (f.getName().equals("field2130"))
{
//Collection<Integer> col3 = col.stream().map(i -> i.value).collect(Collectors.toSet());

101
src/test/java/net/runelite/deob/deobfuscators/arithmetic/MultiplyOneDeobfuscatorTest.java
View File

@@ -10,10 +10,14 @@ import net.runelite.deob.attributes.code.instructions.Goto;
import net.runelite.deob.attributes.code.instructions.IConst_1;
import net.runelite.deob.attributes.code.instructions.IConst_2;
import net.runelite.deob.attributes.code.instructions.IConst_3;
import net.runelite.deob.attributes.code.instructions.IConst_M1;
import net.runelite.deob.attributes.code.instructions.ILoad;
import net.runelite.deob.attributes.code.instructions.IMul;
import net.runelite.deob.attributes.code.instructions.IStore_0;
import net.runelite.deob.attributes.code.instructions.IStore_1;
import net.runelite.deob.attributes.code.instructions.If;
import net.runelite.deob.attributes.code.instructions.If0;
import net.runelite.deob.attributes.code.instructions.LDC_W;
import net.runelite.deob.attributes.code.instructions.NOP;
import net.runelite.deob.attributes.code.instructions.SiPush;
import net.runelite.deob.attributes.code.instructions.VReturn;
@@ -131,4 +135,101 @@ public class MultiplyOneDeobfuscatorTest
Assert.assertTrue(one.getInstructions() == null);
Assert.assertTrue(mul.getInstructions() == null);
}
// iconst_1
// iconst_m1
// iload 5
// if_icmpeq LABEL0x56d1
// iload 5
// iconst_1
// if_icmpne LABEL0x56e8
// goto LABEL0x56d1
//LABEL0x56d1:
// getstatic class139/field2130 I
// ldc_w -1440517609
// imul
// goto LABEL0x5708
//LABEL0x56e8:
// getstatic class139/field2130 I
// ldc_w -1440517609
// imul
// getstatic client/field377 I
// iadd
// iconst_2
// idiv
//LABEL0x5708:
// imul
// putstatic client/field377 I
//
// client.field377 = 1 * (-1 != var5 && var5 != 1?(class139.field2130 + client.field377) / 2:class139.field2130);
@Test
public void test2()
{
ClassGroup group = ClassGroupFactory.generateGroup();
Code code = group.findClass("test").findMethod("func").getCode();
Instructions ins = code.getInstructions();
code.setMaxStack(2);
// vars[0] = 3
Instruction[] prepareVariables = {
new IConst_3(ins),
new IStore_0(ins),
new IConst_2(ins),
new IStore_1(ins)
};
for (Instruction i : prepareVariables)
ins.addInstruction(i);
NOP label = new NOP(ins),
label2 = new NOP(ins),
label3 = new NOP(ins);
IConst_1 one = new IConst_1(ins);
IMul mul = new IMul(ins);
Instruction body[] = {
one,
new IConst_M1(ins),
new ILoad(ins, 0),
new If(ins, label),
new ILoad(ins, 0),
new IConst_1(ins),
new If(ins, label2),
label,
new ILoad(ins, 1),
new LDC_W(ins, -1440517609),
new IMul(ins),
new Goto(ins, label3),
label2,
new ILoad(ins, 1),
new LDC_W(ins, -1440517609),
new IMul(ins),
label3,
mul,
new VReturn(ins)
};
for (Instruction i : body)
ins.addInstruction(i);
// check execution runs ok
Execution e = new Execution(group);
e.populateInitialMethods();
e.run();
Deobfuscator d = new MultiplyOneDeobfuscator();
d.run(group);
Assert.assertTrue(one.getInstructions() == null);
Assert.assertTrue(mul.getInstructions() == null);
}
}