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Fix methodinliner to move jumps to the function being inlined to the right place

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(cherry picked from commit fae040a98f)
This commit is contained in:
Adam
2015-09-05 19:10:57 -04:00
parent 9878fb59b3
commit 9c16bc7ede
1 changed files with 21 additions and 10 deletions
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31
src/main/java/net/runelite/deob/deobfuscators/MethodInliner.java
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@@ -111,6 +111,8 @@ public class MethodInliner implements Deobfuscator
idx += descriptor.getTypeOfArg(j).getSlots();
}
Instruction firstParamStore = null;
for (int j = descriptor.size() - 1; j >= 0; --j)
{
Type type = descriptor.getTypeOfArg(j);
@@ -151,12 +153,15 @@ public class MethodInliner implements Deobfuscator
// insert storeIns before invoke instruction
ins.getInstructions().add(invokeIdx++, storeIns);
if (firstParamStore == null)
firstParamStore = storeIns;
}
int maxStack = code.getMaxStack() + invokedMethod.getCode().getMaxStack(); // not really right but ok
code.setMaxStack(maxStack);
inline(m, i, invokedMethod, lvtIndex);
inline(m, i, invokedMethod, lvtIndex, firstParamStore);
moveExceptions(m, invokedMethod);
++inlineCount;
break;
@@ -165,7 +170,7 @@ public class MethodInliner implements Deobfuscator
return inlineCount;
}
private void inline(Method method, Instruction invokeIns, Method invokeMethod, int lvtBase)
private void inline(Method method, Instruction invokeIns, Method invokeMethod, int lvtBase, Instruction firstParamStore)
{
Code methodCode = method.getCode(),
invokeMethodCode = invokeMethod.getCode();
@@ -177,11 +182,17 @@ public class MethodInliner implements Deobfuscator
Instruction nextInstruction = methodInstructions.getInstructions().get(idx + 1);
// move stuff which jumps to invokeIns to nop
// move stuff which jumps to invokeIns to firstParamStore. If there are no arguments that are stored,
// firstParamStore is null, and so create a nop instruction.
Instruction nop = new NOP(methodInstructions);
methodInstructions.getInstructions().add(idx + 1, nop);
++idx;
if (firstParamStore == null)
{
Instruction nop = new NOP(methodInstructions);
methodInstructions.getInstructions().add(idx + 1, nop);
++idx;
firstParamStore = nop;
}
methodInstructions.buildJumpGraph();
invokeMethodInstructions.buildJumpGraph();
@@ -191,15 +202,15 @@ public class MethodInliner implements Deobfuscator
assert fromI.jump.contains(invokeIns);
fromI.jump.remove(invokeIns);
fromI.replace(invokeIns, nop);
fromI.replace(invokeIns, firstParamStore);
fromI.jump.add(nop);
nop.from.add(fromI);
fromI.jump.add(firstParamStore);
firstParamStore.from.add(fromI);
}
invokeIns.from.clear();
for (net.runelite.deob.attributes.code.Exception e : invokeMethodCode.getExceptions().getExceptions())
e.replace(invokeIns, nop);
e.replace(invokeIns, firstParamStore);
methodInstructions.remove(invokeIns);