Example usage for org.objectweb.asm Opcodes NOP

List of usage examples for org.objectweb.asm Opcodes NOP

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Introduction

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

Prototype

int NOP

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

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Usage

From source file:org.eclipse.objectteams.otredyn.bytecode.asm.AsmTypeHelper.java

License:Open Source License

public static AbstractInsnNode getBoxingInstructionForType(Type type) {
    String className = getObjectType(type);
    if (className == null)
        return new InsnNode(Opcodes.NOP);

    String desc = Type.getMethodDescriptor(Type.getObjectType(className), new Type[] { type });
    return new MethodInsnNode(Opcodes.INVOKESTATIC, className, "valueOf", desc, false);
}

From source file:org.evosuite.graphs.cfg.BytecodeInstructionPool.java

License:Open Source License

/**
 * <p>/*from  w  w  w .  jav  a  2 s .c o m*/
 * createFakeInstruction
 * </p>
 * 
 * @param className
 *            a {@link java.lang.String} object.
 * @param methodName
 *            a {@link java.lang.String} object.
 * @return a {@link org.evosuite.graphs.cfg.BytecodeInstruction} object.
 */
public BytecodeInstruction createFakeInstruction(String className, String methodName) {

    AbstractInsnNode fakeNode = new InsnNode(Opcodes.NOP);

    int instructionId = getInstructionsIn(className, methodName).size();

    BytecodeInstruction instruction = new BytecodeInstruction(classLoader, className, methodName, instructionId,
            -1, fakeNode);

    registerInstruction(instruction);

    return instruction;

}

From source file:org.jacoco.core.instr.ResizeInstructionsTest.java

License:Open Source License

/**
 * Test of ASM bug/*from w ww.j ava 2 s  .  co m*/
 * <a href="https://gitlab.ow2.org/asm/asm/issues/317792">#317792</a>.
 */
@Test
public void should_not_loose_InnerClasses_attribute() throws Exception {
    byte[] source = TargetLoader.getClassDataAsBytes(Inner.class);

    final ClassReader cr = InstrSupport.classReaderFor(source);
    final ClassWriter cw = new ClassWriter(0);
    cr.accept(new ClassVisitor(InstrSupport.ASM_API_VERSION, cw) {
        @Override
        public void visitEnd() {
            final MethodVisitor mv = cv.visitMethod(0, "m", "()V", null, null);
            mv.visitCode();
            addCauseOfResizeInstructions(mv);
            mv.visitInsn(Opcodes.NOP);
            mv.visitMaxs(2, 1);
            mv.visitEnd();
            super.visitEnd();
        }
    }, 0);
    source = cw.toByteArray();

    final byte[] bytes = instrumenter.instrument(source, "");

    final TargetLoader targetLoader = new TargetLoader();
    final Class<?> outer = targetLoader.add(ResizeInstructionsTest.class,
            TargetLoader.getClassDataAsBytes(ResizeInstructionsTest.class));
    final Class<?> inner = targetLoader.add(Inner.class, bytes);
    assertSame(outer, inner.getEnclosingClass());
    assertNotNull(inner.getEnclosingClass());
    assertSame(outer, inner.getDeclaringClass());
    assertNotNull(inner.getDeclaringClass());
}

From source file:org.jacoco.core.instr.ResizeInstructionsTest.java

License:Open Source License

/**
 * Adds code that triggers usage of// ww  w  .  j a va2 s .c  om
 * {@link org.objectweb.asm.MethodWriter#COMPUTE_INSERTED_FRAMES} during
 * instrumentation.
 */
private static void addCauseOfResizeInstructions(final MethodVisitor mv) {
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitInsn(Opcodes.ICONST_1);
    final Label target = new Label();
    mv.visitJumpInsn(Opcodes.IFLE, target);
    for (int i = 0; i < Short.MAX_VALUE; i++) {
        mv.visitInsn(Opcodes.NOP);
    }
    mv.visitLabel(target);
}

From source file:org.jacoco.core.internal.analysis.AC_MethodAnalyzerTest.java

License:Open Source License

private void createLinearSequence() {
    final Label l0 = new Label();
    method.visitLabel(l0);//from ww w.  j a  va  2 s .  c o  m
    method.visitLineNumber(1001, l0);
    method.visitInsn(Opcodes.NOP);
    final Label l1 = new Label();
    method.visitLabel(l1);
    method.visitLineNumber(1002, l1);
    method.visitInsn(Opcodes.RETURN);
}

From source file:org.jacoco.core.internal.analysis.AC_MethodAnalyzerTest.java

License:Open Source License

private void createIfBranchMerge() {
    final Label l0 = new Label();
    method.visitLabel(l0);//from ww  w.  j  a v a  2 s .c  o  m
    method.visitLineNumber(1001, l0);
    method.visitVarInsn(Opcodes.ILOAD, 1);
    Label l1 = new Label();
    method.visitJumpInsn(Opcodes.IFEQ, l1);
    final Label l2 = new Label();
    method.visitLabel(l2);
    method.visitLineNumber(1002, l2);
    method.visitInsn(Opcodes.NOP);
    method.visitLabel(l1);
    method.visitLineNumber(1003, l1);
    method.visitInsn(Opcodes.RETURN);
}

From source file:org.jacoco.core.internal.analysis.filter.AbstractMatcherTest.java

License:Open Source License

@Test
public void skipNonOpcodes() {
    m.visitFrame(Opcodes.F_FULL, 0, null, 0, null);
    final Label label = new Label();
    m.visitLabel(label);/*from w w w  .  j  a  v a 2 s.  c  o m*/
    m.visitLineNumber(42, label);
    m.visitInsn(Opcodes.NOP);

    // should skip all non opcodes
    matcher.cursor = m.instructions.getFirst();
    matcher.skipNonOpcodes();
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should not change cursor when it points on instruction with opcode
    matcher.skipNonOpcodes();
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should not do anything when cursor is null
    matcher.cursor = null;
    matcher.skipNonOpcodes();
}

From source file:org.jacoco.core.internal.analysis.filter.AbstractMatcherTest.java

License:Open Source License

@Test
public void nextIs() {
    m.visitInsn(Opcodes.NOP);
    m.visitInsn(Opcodes.NOP);/*from  w w w  . jav a2  s.c om*/

    // should set cursor to null when opcode mismatch
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIs(Opcodes.ATHROW);
    assertNull(matcher.cursor);

    // should set cursor to next instruction when match
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIs(Opcodes.NOP);
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should not do anything when cursor is null
    matcher.cursor = null;
    matcher.nextIs(Opcodes.NOP);
}

From source file:org.jacoco.core.internal.analysis.filter.AbstractMatcherTest.java

License:Open Source License

@Test
public void nextIsSwitch() {
    // should set cursor to null when opcode mismatch
    m.visitInsn(Opcodes.NOP);
    m.visitInsn(Opcodes.NOP);/*from   w  w  w.  j a  va2s.com*/
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIsSwitch();
    assertNull(matcher.cursor);

    // should set cursor to next instruction when match
    m.instructions.clear();
    m.visitInsn(Opcodes.NOP);
    m.visitTableSwitchInsn(0, 0, new Label());
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIsSwitch();
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should set cursor to next instruction when match
    m.instructions.clear();
    m.visitInsn(Opcodes.NOP);
    m.visitLookupSwitchInsn(new Label(), null, new Label[0]);
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIsSwitch();
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should not do anything when cursor is null
    matcher.cursor = null;
    matcher.nextIsSwitch();
}

From source file:org.jacoco.core.internal.analysis.filter.AbstractMatcherTest.java

License:Open Source License

@Test
public void nextIsVar() {
    m.visitInsn(Opcodes.NOP);
    m.visitVarInsn(Opcodes.ILOAD, 42);/*  ww  w.j av  a2  s.c o  m*/

    // should set cursor to null when opcode mismatch
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIsVar(Opcodes.ALOAD, "name");
    assertNull(matcher.cursor);

    // should set cursor to next instruction when match
    matcher.cursor = m.instructions.getFirst();
    matcher.nextIsVar(Opcodes.ILOAD, "name");
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should set cursor to null when var mismatch
    matcher.cursor = m.instructions.getFirst();
    matcher.vars.put("name", new VarInsnNode(Opcodes.ILOAD, 13));
    matcher.nextIsVar(Opcodes.ILOAD, "name");
    assertNull(matcher.cursor);

    // should set cursor to next instruction when match
    matcher.cursor = m.instructions.getFirst();
    matcher.vars.put("name", new VarInsnNode(Opcodes.ILOAD, 42));
    matcher.nextIsVar(Opcodes.ILOAD, "name");
    assertSame(m.instructions.getLast(), matcher.cursor);

    // should not do anything when cursor is null
    matcher.cursor = null;
    matcher.nextIsVar(Opcodes.ILOAD, "name");
}