Examples with Instructions net.runelite.asm.attributes.code.Instructions used on opensource projects

Example 21 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class ModArith method insertGetterSetterMuls.

private void insertGetterSetterMuls(Encryption encr) {
    // before setfield insert imul * getter
    for (ClassFile cf : group.getClasses()) {
        for (Method m : cf.getMethods()) {
            Code code = m.getCode();
            if (code == null) {
                continue;
            }
            Instructions ins = code.getInstructions();
            List<Instruction> ilist = ins.getInstructions();
            for (int i = 0; i < ilist.size(); ++i) {
                Instruction in = ilist.get(i);
                if (in instanceof SetFieldInstruction) {
                    SetFieldInstruction sfi = (SetFieldInstruction) in;
                    Field f = sfi.getMyField();
                    if (f == null) {
                        continue;
                    }
                    Pair p = encr.getField(f.getPoolField());
                    if (p == null) {
                        continue;
                    }
                    // insert imul
                    if (p.getType() == Integer.class) {
                        ilist.add(i++, new LDC(ins, (int) p.getter));
                        ilist.add(i++, new IMul(ins));
                    } else if (p.getType() == Long.class) {
                        ilist.add(i++, new LDC(ins, (long) p.getter));
                        ilist.add(i++, new LMul(ins));
                    } else {
                        throw new IllegalStateException();
                    }
                } else if (in instanceof GetFieldInstruction) {
                    GetFieldInstruction sfi = (GetFieldInstruction) in;
                    Field f = sfi.getMyField();
                    if (f == null) {
                        continue;
                    }
                    Pair p = encr.getField(f.getPoolField());
                    if (p == null) {
                        continue;
                    }
                    // imul
                    if (p.getType() == Integer.class) {
                        ilist.add(++i, new LDC(ins, (int) p.setter));
                        ilist.add(++i, new IMul(ins));
                    } else if (p.getType() == Long.class) {
                        ilist.add(++i, new LDC(ins, (long) p.setter));
                        ilist.add(++i, new LMul(ins));
                    } else {
                        throw new IllegalStateException();
                    }
                }
            }
        }
    }
}

Example 22 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class ControlFlowDeobfuscator method runJumpLabel.

/**
 * remove jumps followed immediately by the label they are jumping to
 *
 * @param code
 */
private void runJumpLabel(Code code) {
    Instructions ins = code.getInstructions();
    List<Instruction> instructions = ins.getInstructions();
    for (int i = 0; i < instructions.size() - 1; ++i) {
        Instruction i1 = instructions.get(i), i2 = instructions.get(i + 1);
        if (!(i1 instanceof Goto)) {
            continue;
        }
        Goto g = (Goto) i1;
        assert g.getJumps().size() == 1;
        if (g.getJumps().get(0) != i2) {
            continue;
        }
        // remove jump
        ins.remove(i1);
        ++removedJumps;
    // i now points to i2, so next loop we go to next instruction
    }
}

Example 23 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class ControlFlowDeobfuscator method split.

/**
 * Add gotos at the end of blocks without terminal instructions
 *
 * @param code
 */
private void split(Code code) {
    Instructions ins = code.getInstructions();
    Exceptions exceptions = code.getExceptions();
    ControlFlowGraph graph = new ControlFlowGraph.Builder().build(code);
    List<Exception> exc = new ArrayList<>(exceptions.getExceptions());
    // Must clear this before ins.clear() runs
    exceptions.clear();
    ins.clear();
    // insert jumps where blocks flow into others
    for (Block block : graph.getBlocks()) {
        if (block.getFlowsInto() == null) {
            continue;
        }
        Block into = block.getFlowsInto();
        assert into.getFlowsFrom() == block;
        Instruction first = into.getInstructions().get(0);
        Label label;
        if (!(first instanceof Label)) {
            label = new Label(null);
            into.addInstruction(0, label);
        } else {
            label = (Label) first;
        }
        Goto g = new Goto(null, label);
        block.addInstruction(g);
        block.setFlowsInto(null);
        into.setFlowsFrom(null);
        ++insertedJump;
    }
    // Readd instructions from modified blocks
    for (Block block : graph.getBlocks()) {
        for (Instruction i : block.getInstructions()) {
            assert i.getInstructions() == null;
            // I shouldn't have to do this here
            i.setInstructions(ins);
            ins.addInstruction(i);
        }
    }
    // Readd exceptions
    for (Exception ex : exc) {
        exceptions.add(ex);
    }
}

Example 24 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class FieldInliner method inlineUse.

public int inlineUse() {
    int count = 0;
    for (Field f : fields) {
        // replace getfield with constant push
        List<FieldInstruction> fins = fieldInstructions.get(f).stream().filter(f2 -> f2 instanceof GetFieldInstruction).collect(Collectors.toList());
        Object value = f.getValue();
        for (FieldInstruction fin : fins) {
            // remove fin, add push constant
            Instruction i = (Instruction) fin;
            Instruction pushIns = new LDC(i.getInstructions(), value);
            List<Instruction> instructions = i.getInstructions().getInstructions();
            int idx = instructions.indexOf(i);
            assert idx != -1;
            i.getInstructions().remove(i);
            instructions.add(idx, pushIns);
            ++count;
        }
        f.getClassFile().removeField(f);
    }
    return count;
}

Example 25 with Instructions

use of net.runelite.asm.attributes.code.Instructions in project runelite by runelite.

the class IllegalStateExceptions method findInteresting.

/* find if, new, ..., athrow, replace with goto */
private void findInteresting(ClassGroup group) {
    for (ClassFile cf : group.getClasses()) {
        for (Method m : cf.getMethods()) {
            Code c = m.getCode();
            if (c == null)
                continue;
            Instructions instructions = c.getInstructions();
            List<Instruction> ilist = instructions.getInstructions();
            for (int i = 0; i < ilist.size(); ++i) {
                Instruction ins = ilist.get(i);
                if (// the if
                !(ins instanceof ComparisonInstruction))
                    continue;
                Instruction ins2 = ilist.get(i + 1);
                if (!(ins2 instanceof New))
                    continue;
                New new2 = (New) ins2;
                net.runelite.asm.pool.Class clazz = new2.getNewClass();
                if (!clazz.getName().contains("java/lang/IllegalStateException"))
                    continue;
                interesting.add(ins);
            }
        }
    }
}