Example usage for org.objectweb.asm Opcodes IF

Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes IF_ICMPGE.

Prototype

int IF_ICMPGE

To view the source code for org.objectweb.asm Opcodes IF_ICMPGE.

Click Source Link

Usage

From source file:org.sonar.java.bytecode.se.BytecodeEGWalkerExecuteTest.java

License:Open Source License

@Test
public void test_compare_instructions() {
    int[] opcodes = { Opcodes.IF_ICMPEQ, Opcodes.IF_ICMPNE, Opcodes.IF_ICMPLT, Opcodes.IF_ICMPGE,
            Opcodes.IF_ACMPEQ, Opcodes.IF_ACMPNE };
    SymbolicValue left = new SymbolicValue();
    SymbolicValue right = new SymbolicValue();
    for (int opcode : opcodes) {
        ProgramState programState = walker.branchingState(new Instruction(opcode),
                ProgramState.EMPTY_STATE.stackValue(left).stackValue(right));
        RelationalSymbolicValue relSV = (RelationalSymbolicValue) programState.peekValue();
        assertThat(relSV.getLeftOp()).isSameAs(left);
        assertThat(relSV.getRightOp()).isSameAs(right);
    }/*from w  w  w . jav  a 2  s .co  m*/

    // these opcodes inverse operator and swap operands
    int[] swapOperandsOpcodes = { Opcodes.IF_ICMPLE, Opcodes.IF_ICMPGT };
    for (int opcode : swapOperandsOpcodes) {
        ProgramState programState = walker.branchingState(new Instruction(opcode),
                ProgramState.EMPTY_STATE.stackValue(left).stackValue(right));
        RelationalSymbolicValue relSV = (RelationalSymbolicValue) programState.peekValue();
        assertThat(relSV.getRightOp()).isSameAs(left);
        assertThat(relSV.getLeftOp()).isSameAs(right);
    }
}

From source file:org.spongepowered.asm.mixin.injection.points.JumpInsnPoint.java

License:MIT License

public JumpInsnPoint(InjectionPointData data) {
    this.opCode = data.getOpcode(-1, Opcodes.IFEQ, Opcodes.IFNE, Opcodes.IFLT, Opcodes.IFGE, Opcodes.IFGT,
            Opcodes.IFLE, Opcodes.IF_ICMPEQ, Opcodes.IF_ICMPNE, Opcodes.IF_ICMPLT, Opcodes.IF_ICMPGE,
            Opcodes.IF_ICMPGT, Opcodes.IF_ICMPLE, Opcodes.IF_ACMPEQ, Opcodes.IF_ACMPNE, Opcodes.GOTO,
            Opcodes.JSR, Opcodes.IFNULL, Opcodes.IFNONNULL, -1);
    this.ordinal = data.getOrdinal();
}

From source file:serianalyzer.JVMImpl.java

License:Open Source License

/**
 * @param opcode//from ww  w  . ja v a2s .  c  o  m
 * @param label
 * @param s
 * @return
 */
static boolean handleJVMJump(int opcode, Label label, JVMStackState s) {
    boolean tainted;
    switch (opcode) {
    case Opcodes.IF_ICMPEQ:
    case Opcodes.IF_ICMPNE:
    case Opcodes.IF_ICMPLT:
    case Opcodes.IF_ICMPGE:
    case Opcodes.IF_ICMPGT:
    case Opcodes.IF_ICMPLE:
    case Opcodes.IF_ACMPEQ:
    case Opcodes.IF_ACMPNE:
        BaseType o1 = s.pop();
        BaseType o2 = s.pop();
        tainted = !(o1 != null) || !(o2 != null) || o1.isTainted() || o2.isTainted();
        break;
    case Opcodes.IFEQ:
    case Opcodes.IFNE:
    case Opcodes.IFLT:
    case Opcodes.IFGE:
    case Opcodes.IFGT:
    case Opcodes.IFLE:
    case Opcodes.IFNULL:
    case Opcodes.IFNONNULL:
        BaseType c = s.pop();
        tainted = (c == null || c.isTainted());
        break;

    case Opcodes.JSR:
        s.push(new BasicConstant(Type.INT_TYPE, label));
        tainted = false;
        break;
    case Opcodes.GOTO:
        tainted = false;
        break;
    default:
        log.warn("Unsupported opcode " + opcode); //$NON-NLS-1$
        tainted = true;
    }
    return tainted;
}

From source file:uk.co.mysterymayhem.tessellatorfix.Transformer.java

private static byte[] patchTessellatorClass(byte[] bytes) {
    String targetMethodName;//from   w  ww.  j  a  va2s . c  om

    if (Plugin.runtimeDeobfEnabled) {
        targetMethodName = "func_147564_a";
    } else {
        targetMethodName = "getVertexState";
    }

    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(bytes);
    classReader.accept(classNode, 0);

    Iterator<MethodNode> methods = classNode.methods.iterator();
    while (methods.hasNext()) {
        MethodNode m = methods.next();
        if ((m.name.equals(targetMethodName)
                && m.desc.equals("(FFF)Lnet/minecraft/client/shader/TesselatorVertexState;"))) {
            FMLLog.info("Inside target Tessellator method");

            InsnList toInject = new InsnList();

            // Insertion of "if (this.rawBufferIndex < 1) return"
            LabelNode labelNode = new LabelNode();

            toInject.add(new VarInsnNode(Opcodes.ALOAD, 0));
            String fieldName;
            if (Plugin.runtimeDeobfEnabled) {
                fieldName = "field_147569_p";
            } else {
                fieldName = "rawBufferIndex";
            }
            toInject.add(new FieldInsnNode(Opcodes.GETFIELD, "net/minecraft/client/renderer/Tessellator",
                    fieldName, "I"));
            toInject.add(new InsnNode(Opcodes.ICONST_1));
            toInject.add(new JumpInsnNode(Opcodes.IF_ICMPGE, labelNode));
            toInject.add(new InsnNode(Opcodes.ACONST_NULL));
            toInject.add(new InsnNode(Opcodes.ARETURN));
            toInject.add(labelNode);

            // Insert after
            m.instructions.insert(toInject);

            ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
            classNode.accept(writer);
            FMLLog.info("Exiting target Tessellator method");
            return writer.toByteArray();
        }
    }

    FMLLog.warning("Could not find Tessellator method out of:");
    StringBuilder builder = new StringBuilder();
    for (MethodNode methodNode : classNode.methods) {
        builder.append(methodNode.name).append(":").append(methodNode.desc).append("\n");
    }
    FMLLog.info(builder.toString());

    return bytes;
}

From source file:v6.java.preverifier.MethodRewriter.java

License:Open Source License

/**
 * Visit the specified instruction and do the right thing.
 * //from w  w  w  .j  a va2s . co m
 * @param method
 * @param region
 * @param insnNode
 * @throws AnalyzerException
 */
private void visitInstruction(MethodNode method, Region region, AbstractInsnNode insnNode)
        throws AnalyzerException {
    int opcode = insnNode.getOpcode();
    switch (opcode) {
    case Opcodes.JSR:
        visitJumpToSubroutine(method, region, (JumpInsnNode) insnNode);
        break;

    case Opcodes.IFEQ:
    case Opcodes.IFNE:
    case Opcodes.IFLT:
    case Opcodes.IFGE:
    case Opcodes.IFGT:
    case Opcodes.IFLE:
    case Opcodes.IF_ICMPEQ:
    case Opcodes.IF_ICMPNE:
    case Opcodes.IF_ICMPLT:
    case Opcodes.IF_ICMPGE:
    case Opcodes.IF_ICMPGT:
    case Opcodes.IF_ICMPLE:
    case Opcodes.IF_ACMPEQ:
    case Opcodes.IF_ACMPNE:
    case Opcodes.GOTO:
    case Opcodes.IFNULL:
    case Opcodes.IFNONNULL:
        visitJump(method, region, (JumpInsnNode) insnNode);
        break;

    case Opcodes.LOOKUPSWITCH:
        visitLookupSwitch(method, region, (LookupSwitchInsnNode) insnNode);
        break;

    case Opcodes.TABLESWITCH:
        visitTableSwitch(method, region, (TableSwitchInsnNode) insnNode);
        break;

    default:
        insnNode.accept(method);
    }
}

Example usage for org.objectweb.asm Opcodes IF_ICMPGE

Introduction

Prototype

Usage