Example usage for org.objectweb.asm Opcodes ARETURN

Introduction

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

Prototype

int ARETURN

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

Click Source Link

Usage

From source file:org.pitest.mutationtest.engine.gregor.mutators.ReturnValsMutator.java

License:Apache License

private static ZeroOperandMutation areturnMutation() {
    return new ZeroOperandMutation() {

        public void apply(final int opCode, final MethodVisitor mv) {

            // Strategy translated from jumble BCEL code
            // if result is non-null make it null, otherwise hard case
            // for moment throw runtime exception
            final Label l1 = new Label();
            mv.visitJumpInsn(Opcodes.IFNONNULL, l1);
            mv.visitTypeInsn(Opcodes.NEW, "java/lang/RuntimeException");
            mv.visitInsn(Opcodes.DUP);/*w  ww.ja  v  a2s . c  o m*/
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/RuntimeException", "<init>", "()V", false);
            mv.visitInsn(Opcodes.ATHROW);
            mv.visitLabel(l1);
            mv.visitInsn(Opcodes.ACONST_NULL);
            mv.visitInsn(Opcodes.ARETURN);
        }

        public String decribe(final int opCode, final MethodInfo methodInfo) {
            return "mutated return of Object value for " + methodInfo.getDescription()
                    + " to ( if (x != null) null else throw new RuntimeException )";
        }

    };
}

---

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

License:Open Source License

@Test
public void test_xReturn() throws Exception {
    SymbolicValue returnValue = new SymbolicValue();
    int[] opcodes = { Opcodes.IRETURN, Opcodes.LRETURN, Opcodes.FRETURN, Opcodes.DRETURN, Opcodes.ARETURN };
    for (int opcode : opcodes) {
        ProgramState programState = execute(new Instruction(opcode),
                ProgramState.EMPTY_STATE.stackValue(returnValue));
        assertThat(programState.peekValue()).isNull();
        assertThat(programState.exitValue()).isEqualTo(returnValue);
    }/*from  www . jav a2 s  .com*/
}

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From source file:org.spongepowered.despector.emitter.bytecode.statement.BytecodeReturnEmitter.java

License:Open Source License

@Override
public void emit(BytecodeEmitterContext ctx, Return stmt, boolean semicolon) {
    MethodVisitor mv = ctx.getMethodVisitor();
    if (!stmt.getValue().isPresent()) {
        mv.visitInsn(Opcodes.RETURN);//from w  w  w . j a  v a  2 s  .  c  o  m
    } else {
        ctx.updateStack(-1);
        Instruction insn = stmt.getValue().get();
        ctx.emitInstruction(insn, ctx.getMethod().getReturnType());
        TypeSignature ret = ctx.getMethod().getReturnType();
        if (ret == ClassTypeSignature.INT || ret == ClassTypeSignature.BOOLEAN || ret == ClassTypeSignature.BYTE
                || ret == ClassTypeSignature.SHORT || ret == ClassTypeSignature.CHAR) {
            mv.visitInsn(Opcodes.IRETURN);
        } else if (ret == ClassTypeSignature.LONG) {
            mv.visitInsn(Opcodes.LRETURN);
        } else if (ret == ClassTypeSignature.FLOAT) {
            mv.visitInsn(Opcodes.FRETURN);
        } else if (ret == ClassTypeSignature.DOUBLE) {
            mv.visitInsn(Opcodes.DRETURN);
        } else {
            mv.visitInsn(Opcodes.ARETURN);
        }
    }
}

---

From source file:org.spongepowered.mod.asm.transformers.EventTransformer.java

License:MIT License

protected static MethodNode createGetGameMethod() {
    MethodNode methodNode = new MethodNode(Opcodes.ASM4, Opcodes.ACC_PUBLIC, "getGame",
            "()Lorg/spongepowered/api/Game;", null, null);
    methodNode.instructions.add(new FieldInsnNode(Opcodes.GETSTATIC, "org/spongepowered/mod/SpongeMod",
            "instance", "Lorg/spongepowered/mod/SpongeMod;"));
    methodNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "org/spongepowered/mod/SpongeMod",
            "getGame", "()Lorg/spongepowered/mod/SpongeGame;", false));
    methodNode.instructions.add(new InsnNode(Opcodes.ARETURN));
    methodNode.maxLocals = 1;//from www  .j a  va2s .  co m
    methodNode.maxStack = 1;
    return methodNode;
}

---

From source file:org.spongepowered.mod.asm.transformers.EventTransformer.java

License:MIT License

protected static MethodNode createGetSimpleNameMethod() {
    MethodNode methodNode = new MethodNode(Opcodes.ASM4, Opcodes.ACC_PUBLIC, "getSimpleName",
            "()Ljava/lang/String;", null, null);
    methodNode.instructions.add(new VarInsnNode(Opcodes.ALOAD, 0));
    methodNode.instructions.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, "java/lang/Object", "getClass",
            "()Ljava/lang/Class;", false));
    methodNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "java/lang/Class", "getSimpleName",
            "()Ljava/lang/String;", false));
    methodNode.instructions.add(new InsnNode(Opcodes.ARETURN));
    methodNode.maxLocals = 1;//from  w  ww  .  ja v  a  2 s . c o m
    methodNode.maxStack = 1;
    return methodNode;
}

---

From source file:org.spongepowered.mod.asm.transformers.PriorityTransformer.java

License:MIT License

private MethodNode createGetGameMethod() {
    MethodNode methodNode = new MethodNode(Opcodes.ASM4, Opcodes.ACC_PUBLIC, "getGame",
            "()Lorg/spongepowered/api/Game;", null, null);
    methodNode.instructions.add(new FieldInsnNode(Opcodes.GETSTATIC, "org/spongepowered/mod/SpongeMod",
            "instance", "Lorg/spongepowered/mod/SpongeMod;"));
    methodNode.instructions.add(new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "org/spongepowered/mod/SpongeMod",
            "getGame", "()Lorg/spongepowered/mod/SpongeGame;", false));
    methodNode.instructions.add(new InsnNode(Opcodes.ARETURN));
    methodNode.maxLocals = 1;/* w  ww. jav  a  2 s.  com*/
    methodNode.maxStack = 1;
    return methodNode;
}

---

From source file:org.teavm.flavour.regex.bytecode.MatcherClassBuilder.java

License:Apache License

private void buildRestartMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "restart", "()" + Type.getDescriptor(Matcher.class),
            null, null);/* w w w .  java  2 s.co  m*/
    mv.visitCode();

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "domain", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ICONST_0);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "state", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(2, 1);
    mv.visitEnd();
}

---

From source file:org.teavm.flavour.regex.bytecode.MatcherClassBuilder.java

License:Apache License

private void buildForkMethod(ClassVisitor cv, String className) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "fork", "()" + Type.getDescriptor(Matcher.class),
            null, null);/*from  www.  j a va2  s . co m*/
    mv.visitCode();

    mv.visitTypeInsn(Opcodes.NEW, className);
    mv.visitInsn(Opcodes.DUP);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, className, "<init>", "()V", false);

    mv.visitInsn(Opcodes.DUP);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "domain", "I");
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "domain", "I");

    mv.visitInsn(Opcodes.DUP);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "state", "I");
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "state", "I");

    mv.visitInsn(Opcodes.DUP);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "index", "I");
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "index", "I");

    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(2, 1);
    mv.visitEnd();
}

---

From source file:org.teavm.flavour.regex.bytecode.MatcherClassBuilder.java

License:Apache License

private void buildEndMethod(ClassVisitor cv, String className, Dfa dfa) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "end", "()" + Type.getDescriptor(Matcher.class), null,
            null);/*w ww. java 2  s  .co  m*/

    stateLabels = new Label[dfa.getStates().size()];
    Arrays.setAll(stateLabels, i -> new Label());
    int[] keys = new int[dfa.getStates().size()];
    Arrays.setAll(keys, IntUnaryOperator.identity());

    saveLabel = new Label();
    errorLabel = new Label();

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "state", "I");
    mv.visitLookupSwitchInsn(errorLabel, keys, stateLabels);

    for (int i = 0; i < dfa.getStates().size(); ++i) {
        mv.visitLabel(stateLabels[i]);
        DfaTransition transition = dfa.getStates().get(i).getTransition(-1);
        if (transition == null) {
            mv.visitJumpInsn(Opcodes.GOTO, errorLabel);
        } else {
            DfaState target = transition.getTarget();
            mv.visitIntInsn(Opcodes.SIPUSH, transition.getTarget().getIndex());
            mv.visitVarInsn(Opcodes.ISTORE, 1);
            mv.visitIntInsn(Opcodes.SIPUSH, !target.isTerminal() ? -1 : target.getDomains()[0]);
            mv.visitVarInsn(Opcodes.ISTORE, 2);
            debug(mv, "DFA: " + i + " .-> " + target.getIndex() + " " + Arrays.toString(target.getDomains()));
            mv.visitJumpInsn(Opcodes.GOTO, saveLabel);
        }
    }

    mv.visitLabel(errorLabel);
    debug(mv, "DFA: error");
    mv.visitInsn(Opcodes.ICONST_M1);
    mv.visitVarInsn(Opcodes.ISTORE, 1);
    mv.visitInsn(Opcodes.ICONST_M1);
    mv.visitVarInsn(Opcodes.ISTORE, 2);
    mv.visitLabel(saveLabel);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "state", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 2);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "domain", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(3, 3);
    mv.visitEnd();
}

---

From source file:org.teavm.flavour.regex.bytecode.MatcherClassBuilder.java

License:Apache License

private void buildWorkerMethod(ClassVisitor cv, String className, Dfa dfa) {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "feed",
            "(Ljava/lang/String;IIZ)" + Type.getDescriptor(Matcher.class), null, null);
    mv.visitCode();//from   w w  w  .  ja  v a2  s  .  c  o m

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitFieldInsn(Opcodes.GETFIELD, className, "state", "I");
    mv.visitVarInsn(Opcodes.ISTORE, 5);

    errorLabel = new Label();
    saveLabel = new Label();
    loopLabel = new Label();
    continueLabel = new Label();

    mv.visitLabel(loopLabel);
    generateLengthGuard(mv);

    stateLabels = new Label[dfa.getStates().size()];
    Arrays.setAll(stateLabels, i -> new Label());
    int[] keys = new int[dfa.getStates().size()];
    Arrays.setAll(keys, IntUnaryOperator.identity());

    mv.visitVarInsn(Opcodes.ILOAD, 5);
    mv.visitLookupSwitchInsn(errorLabel, keys, stateLabels);

    mv.visitLabel(continueLabel);
    mv.visitIincInsn(2, 1);
    mv.visitJumpInsn(Opcodes.GOTO, loopLabel);

    mv.visitLabel(errorLabel);
    debug(mv, "DFA: error");
    mv.visitInsn(Opcodes.ICONST_M1);
    mv.visitVarInsn(Opcodes.ISTORE, 5);

    mv.visitLabel(saveLabel);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 5);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "state", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 2);
    mv.visitFieldInsn(Opcodes.PUTFIELD, className, "index", "I");
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ARETURN);

    for (int i = 0; i < dfa.getStates().size(); ++i) {
        mv.visitLabel(stateLabels[i]);
        DfaState state = dfa.getStates().get(i);
        generateTransitions(state, mv);
    }

    mv.visitMaxs(3, 6);
    mv.visitEnd();
}

---

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