Example usage for org.objectweb.asm MethodVisitor visitJumpInsn

List of usage examples for org.objectweb.asm MethodVisitor visitJumpInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitJumpInsn.

Prototype

public void visitJumpInsn(final int opcode, final Label label)

Source Link

Document

Visits a jump instruction.

Usage

From source file:org.glowroot.agent.advicegen.AdviceGenerator.java

License:Apache License

private void addOnReturnMethod(ClassWriter cw) {
    boolean entryOrTimer = !config.traceEntryEnabledProperty().isEmpty();
    String travelerType = entryOrTimer ? "Ljava/lang/Object;" : "Lorg/glowroot/agent/plugin/api/TraceEntry;";
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onReturn",
            "(Lorg/glowroot/agent/plugin/api/weaving/OptionalReturn;" + travelerType + ")V", null, null);
    mv.visitParameterAnnotation(0, "Lorg/glowroot/agent/plugin/api/weaving/BindOptionalReturn;", true)
            .visitEnd();/* w ww . jav a2s  .  co  m*/
    mv.visitParameterAnnotation(1, "Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true).visitEnd();
    int travelerParamIndex = 1;
    visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnReturn;");
    mv.visitCode();
    if (!config.traceEntryEnabledProperty().isEmpty()) {
        mv.visitVarInsn(ALOAD, travelerParamIndex);
        // TraceEntryImpl implements both TraceEntry and Timer so cannot check instanceof Timer
        // to differentiate here (but can check isntanceof TraceEntry)
        mv.visitTypeInsn(INSTANCEOF, "org/glowroot/agent/plugin/api/TraceEntry");
        Label label = new Label();
        mv.visitJumpInsn(IFNE, label);
        mv.visitVarInsn(ALOAD, travelerParamIndex);
        mv.visitTypeInsn(CHECKCAST, "org/glowroot/agent/plugin/api/Timer");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/Timer", "stop", "()V", true);
        mv.visitInsn(RETURN);
        mv.visitLabel(label);
    }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn", "isVoid", "()Z",
            true);
    Label notVoidLabel = new Label();
    Label endIfLabel = new Label();
    mv.visitJumpInsn(IFEQ, notVoidLabel);
    mv.visitLdcInsn("void");
    mv.visitJumpInsn(GOTO, endIfLabel);
    mv.visitLabel(notVoidLabel);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn", "getValue",
            "()Ljava/lang/Object;", true);
    mv.visitLabel(endIfLabel);
    mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/advicegen/GenericMessageSupplier",
            "updateWithReturnValue", "(Lorg/glowroot/agent/plugin/api/TraceEntry;Ljava/lang/Object;)V", false);
    mv.visitVarInsn(ALOAD, travelerParamIndex);
    Integer stackTraceThresholdMillis = config.traceEntryStackThresholdMillis();
    if (stackTraceThresholdMillis == null) {
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "end", "()V", true);
    } else {
        mv.visitLdcInsn(stackTraceThresholdMillis.longValue());
        mv.visitFieldInsn(GETSTATIC, "java/util/concurrent/TimeUnit", "MILLISECONDS",
                "Ljava/util/concurrent/TimeUnit;");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "endWithStackTrace",
                "(JLjava/util/concurrent/TimeUnit;)V", true);
    }
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.glowroot.agent.advicegen.AdviceGenerator.java

License:Apache License

private void addOnThrowMethod(ClassWriter cw) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onThrow",
            "(Ljava/lang/Throwable;Lorg/glowroot/agent/plugin/api/TraceEntry;)V", null, null);
    visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnThrow;");
    mv.visitParameterAnnotation(0, "Lorg/glowroot/agent/plugin/api/weaving/BindThrowable;", true).visitEnd();
    mv.visitParameterAnnotation(1, "Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true).visitEnd();
    mv.visitCode();//  www.j ava 2  s  .c  o  m
    if (!config.traceEntryEnabledProperty().isEmpty()) {
        mv.visitVarInsn(ALOAD, 1);
        Label l0 = new Label();
        mv.visitJumpInsn(IFNONNULL, l0);
        mv.visitInsn(RETURN);
        mv.visitLabel(l0);
    }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "endWithError",
            "(Ljava/lang/Throwable;)V", true);
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.glowroot.agent.weaving.AdviceGenerator.java

License:Apache License

@RequiresNonNull("methodMetaInternalName")
private void addOnBeforeMethod(ClassWriter cw) {
    MethodVisitor mv = visitOnBeforeMethod(cw, "Lorg/glowroot/agent/plugin/api/TraceEntry;");
    mv.visitCode();/*ww  w.  j  a  va  2 s .  c o m*/
    if (!config.traceEntryEnabledProperty().isEmpty() && pluginId != null) {
        mv.visitFieldInsn(GETSTATIC, adviceInternalName, "entryEnabled",
                "Lorg/glowroot/agent/plugin/api/config/BooleanProperty;");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/config/BooleanProperty", "value",
                "()Z", true);
        Label label = new Label();
        mv.visitJumpInsn(IFNE, label);
        // entryEnabled is false, collect timer only
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETSTATIC, adviceInternalName, "timerName",
                "Lorg/glowroot/agent/plugin/api/TimerName;");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "startTimer",
                "(Lorg/glowroot/agent/plugin/api/TimerName;)" + "Lorg/glowroot/agent/plugin/api/Timer;", true);
        mv.visitInsn(ARETURN);
        mv.visitLabel(label);
    }
    mv.visitVarInsn(ALOAD, 0);
    if (config.isTransaction()) {
        String transactionType = config.transactionType();
        if (transactionType.isEmpty()) {
            mv.visitLdcInsn("<no transaction type provided>");
        } else {
            mv.visitLdcInsn(transactionType);
        }
        mv.visitVarInsn(ALOAD, 4);
        mv.visitMethodInsn(INVOKEVIRTUAL, methodMetaInternalName, "getTransactionNameTemplate",
                "()Lorg/glowroot/agent/weaving/MessageTemplate;", false);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitVarInsn(ALOAD, 3);
        mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/weaving/GenericMessageSupplier", "create",
                "(Lorg/glowroot/agent/weaving/MessageTemplate;"
                        + "Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;)"
                        + "Lorg/glowroot/agent/weaving/GenericMessageSupplier;",
                false);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/glowroot/agent/weaving/GenericMessageSupplier", "getMessageText",
                "()Ljava/lang/String;", false);
    }
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKEVIRTUAL, methodMetaInternalName, "getMessageTemplate",
            "()Lorg/glowroot/agent/weaving/MessageTemplate;", false);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitVarInsn(ALOAD, 3);
    mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/weaving/GenericMessageSupplier", "create",
            "(Lorg/glowroot/agent/weaving/MessageTemplate;"
                    + "Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;)"
                    + "Lorg/glowroot/agent/weaving/GenericMessageSupplier;",
            false);
    mv.visitFieldInsn(GETSTATIC, adviceInternalName, "timerName", "Lorg/glowroot/agent/plugin/api/TimerName;");
    if (config.isTransaction()) {
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/OptionalThreadContext",
                "startTransaction",
                "(Ljava/lang/String;Ljava/lang/String;" + "Lorg/glowroot/agent/plugin/api/MessageSupplier;"
                        + "Lorg/glowroot/agent/plugin/api/TimerName;)"
                        + "Lorg/glowroot/agent/plugin/api/TraceEntry;",
                true);
    } else {
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/ThreadContext", "startTraceEntry",
                "(Lorg/glowroot/agent/plugin/api/MessageSupplier;"
                        + "Lorg/glowroot/agent/plugin/api/TimerName;)"
                        + "Lorg/glowroot/agent/plugin/api/TraceEntry;",
                true);
    }
    addCodeForOptionalTransactionAttributes(mv);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.glowroot.agent.weaving.AdviceGenerator.java

License:Apache License

private void addOnReturnMethod(ClassWriter cw) {
    boolean entryOrTimer = !config.traceEntryEnabledProperty().isEmpty();
    String travelerType = entryOrTimer ? "Ljava/lang/Object;" : "Lorg/glowroot/agent/plugin/api/TraceEntry;";
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onReturn",
            "(Lorg/glowroot/agent/plugin/api/weaving/OptionalReturn;" + travelerType + ")V", null, null);
    mv.visitParameterAnnotation(0, "Lorg/glowroot/agent/plugin/api/weaving/BindOptionalReturn;", true)
            .visitEnd();//from  ww w  . ja va  2s  . c  om
    mv.visitParameterAnnotation(1, "Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true).visitEnd();
    int travelerParamIndex = 1;
    visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnReturn;");
    mv.visitCode();
    if (!config.traceEntryEnabledProperty().isEmpty()) {
        mv.visitVarInsn(ALOAD, travelerParamIndex);
        // TraceEntryImpl implements both TraceEntry and Timer so cannot check instanceof Timer
        // to differentiate here (but can check isntanceof TraceEntry)
        mv.visitTypeInsn(INSTANCEOF, "org/glowroot/agent/plugin/api/TraceEntry");
        Label label = new Label();
        mv.visitJumpInsn(IFNE, label);
        mv.visitVarInsn(ALOAD, travelerParamIndex);
        mv.visitTypeInsn(CHECKCAST, "org/glowroot/agent/plugin/api/Timer");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/Timer", "stop", "()V", true);
        mv.visitInsn(RETURN);
        mv.visitLabel(label);
    }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn", "isVoid", "()Z",
            true);
    Label notVoidLabel = new Label();
    Label endIfLabel = new Label();
    mv.visitJumpInsn(IFEQ, notVoidLabel);
    mv.visitLdcInsn("void");
    mv.visitJumpInsn(GOTO, endIfLabel);
    mv.visitLabel(notVoidLabel);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn", "getValue",
            "()Ljava/lang/Object;", true);
    mv.visitLabel(endIfLabel);
    mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/weaving/GenericMessageSupplier",
            "updateWithReturnValue", "(Lorg/glowroot/agent/plugin/api/TraceEntry;Ljava/lang/Object;)V", false);
    mv.visitVarInsn(ALOAD, travelerParamIndex);
    Integer stackTraceThresholdMillis = config.traceEntryStackThresholdMillis();
    if (stackTraceThresholdMillis == null) {
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "end", "()V", true);
    } else {
        mv.visitLdcInsn(stackTraceThresholdMillis.longValue());
        mv.visitFieldInsn(GETSTATIC, "java/util/concurrent/TimeUnit", "MILLISECONDS",
                "Ljava/util/concurrent/TimeUnit;");
        mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "endWithStackTrace",
                "(JLjava/util/concurrent/TimeUnit;)V", true);
    }
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.glowroot.agent.weaving.GenerateMoreHackedConstructorBytecode.java

License:Apache License

static LazyDefinedClass generateMoreHackedConstructorBytecode() throws Exception {

    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;

    // 1.7+ since testing frames
    cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "MoreHackedConstructorBytecode", null,
            Test.class.getName().replace('.', '/'), new String[] {});

    {/* ww  w.  j ava 2s. c  o  m*/
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        Label trueLabel = new Label();
        mv.visitInsn(ICONST_0);
        mv.visitJumpInsn(IFEQ, trueLabel);
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ATHROW);
        mv.visitLabel(trueLabel);
        mv.visitFrame(F_SAME, 0, null, 0, null);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, Test.class.getName().replace('.', '/'), "<init>", "()V", false);

        mv.visitInsn(RETURN);

        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
    cw.visitEnd();

    return ImmutableLazyDefinedClass.builder().type(Type.getObjectType("MoreHackedConstructorBytecode"))
            .bytes(cw.toByteArray()).build();
}

From source file:org.glowroot.agent.weaving.GenerateStillMoreNotPerfectBytecode.java

License:Apache License

static LazyDefinedClass generateStillMoreNotPerfectBytecode() throws Exception {

    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;

    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, "StillMoreNotPerfectBytecode", null, "java/lang/Object",
            new String[] { Test.class.getName().replace('.', '/') });

    {/*from   www. j  a va2 s  .  c  o m*/
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "execute", "()V", null, null);
        mv.visitCode();
        Label label = new Label();
        mv.visitJumpInsn(GOTO, label);
        // need to generate more than Short.MAX_VALUE instructions so that asm has to generate
        // special instructions in org.objectweb.asm.Label.resolve() and do a second pass at the
        // end of org.objectweb.asm.ClassWriter.toByteArray(), which ended up causing
        // java.lang.NegativeArraySizeException at
        // org.objectweb.asm.Frame.merge(Frame.java:1197)
        // before frames were ignored for Java 6 bytecode in
        // WeavingMethodVisitor.visitImplicitFrame()
        for (int i = 0; i < 20000; i++) {
            mv.visitInsn(ICONST_1);
            mv.visitInsn(POP);
        }
        Label label2 = new Label();
        mv.visitLabel(label2);
        mv.visitInsn(POP);
        mv.visitLabel(label);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
    cw.visitEnd();

    return ImmutableLazyDefinedClass.builder().type(Type.getObjectType("StillMoreNotPerfectBytecode"))
            .bytes(cw.toByteArray()).build();
}

From source file:org.glowroot.agent.weaving.WeavingClassVisitor.java

License:Apache License

@RequiresNonNull({ "type", "metaHolderInternalName", "loader" })
private void generateMetaHolder() throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, metaHolderInternalName, null, "java/lang/Object", null);
    Type metaHolderType = Type.getObjectType(metaHolderInternalName);
    MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
    mv.visitCode();//from ww  w .  ja va  2  s  .com
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/ClassNotFoundException");
    mv.visitLabel(l0);
    for (Type classMetaType : classMetaTypes) {
        String classMetaInternalName = classMetaType.getInternalName();
        String classMetaFieldName = "glowroot$class$meta$" + classMetaInternalName.replace('/', '$');
        FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, classMetaFieldName,
                "L" + classMetaInternalName + ";", null, null);
        fv.visitEnd();
        mv.visitTypeInsn(NEW, classMetaInternalName);
        mv.visitInsn(DUP);
        loadType(mv, type, metaHolderType);
        mv.visitMethodInsn(INVOKESPECIAL, classMetaInternalName, "<init>", "(Ljava/lang/Class;)V", false);
        mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, classMetaFieldName,
                "L" + classMetaInternalName + ";");
    }
    for (MethodMetaGroup methodMetaGroup : methodMetaGroups) {
        for (Type methodMetaType : methodMetaGroup.methodMetaTypes()) {
            String methodMetaInternalName = methodMetaType.getInternalName();
            String methodMetaFieldName = "glowroot$method$meta$" + methodMetaGroup.uniqueNum() + '$'
                    + methodMetaInternalName.replace('/', '$');
            FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, methodMetaFieldName,
                    "L" + methodMetaInternalName + ";", null, null);
            fv.visitEnd();
            mv.visitTypeInsn(NEW, methodMetaInternalName);
            mv.visitInsn(DUP);
            loadType(mv, type, metaHolderType);
            mv.visitLdcInsn(methodMetaGroup.methodName());
            mv.visitIntInsn(BIPUSH, methodMetaGroup.methodParameterTypes().size());
            mv.visitTypeInsn(ANEWARRAY, "java/lang/Class");
            for (int i = 0; i < methodMetaGroup.methodParameterTypes().size(); i++) {
                mv.visitInsn(DUP);
                mv.visitIntInsn(BIPUSH, i);
                loadType(mv, methodMetaGroup.methodParameterTypes().get(i), metaHolderType);
                mv.visitInsn(AASTORE);
            }
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredMethod",
                    "(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;", false);
            mv.visitMethodInsn(INVOKESPECIAL, methodMetaInternalName, "<init>", "(Ljava/lang/reflect/Method;)V",
                    false);
            mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, methodMetaFieldName,
                    "L" + methodMetaInternalName + ";");
        }
    }
    // this is just try/catch ClassNotFoundException/re-throw AssertionError
    mv.visitLabel(l1);
    Label l3 = new Label();
    mv.visitJumpInsn(GOTO, l3);
    mv.visitLabel(l2);
    mv.visitFrame(F_SAME1, 0, null, 1, new Object[] { "java/lang/ClassNotFoundException" });
    mv.visitVarInsn(ASTORE, 0);
    mv.visitTypeInsn(NEW, "java/lang/AssertionError");
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/AssertionError", "<init>", "(Ljava/lang/Object;)V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l3);
    mv.visitFrame(F_SAME, 0, null, 0, null);

    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
    cw.visitEnd();
    byte[] bytes = cw.toByteArray();
    ClassLoaders.defineClass(ClassNames.fromInternalName(metaHolderInternalName), bytes, loader);
}

From source file:org.glowroot.weaving.WeavingClassVisitor.java

License:Apache License

@RequiresNonNull({ "type", "metaHolderInternalName", "loader" })
private void generateMetaHolder() throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, metaHolderInternalName, null, "java/lang/Object", null);
    Type metaHolderType = Type.getObjectType(metaHolderInternalName);
    MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
    mv.visitCode();//  w  w  w. ja v  a  2 s  .  c  o m
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/ClassNotFoundException");
    mv.visitLabel(l0);
    for (Type classMetaType : classMetaTypes) {
        String classMetaInternalName = classMetaType.getInternalName();
        String classMetaFieldName = "glowroot$class$meta$" + classMetaInternalName.replace('/', '$');
        FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, classMetaFieldName,
                "L" + classMetaInternalName + ";", null, null);
        fv.visitEnd();
        mv.visitTypeInsn(NEW, classMetaInternalName);
        mv.visitInsn(DUP);
        loadType(mv, type, metaHolderType);
        mv.visitMethodInsn(INVOKESPECIAL, classMetaInternalName, "<init>", "(Ljava/lang/Class;)V", false);
        mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, classMetaFieldName,
                "L" + classMetaInternalName + ";");
    }
    for (MethodMetaGroup methodMetaGroup : methodMetaGroups) {
        for (Type methodMetaType : methodMetaGroup.methodMetaTypes()) {
            String methodMetaInternalName = methodMetaType.getInternalName();
            String methodMetaFieldName = "glowroot$method$meta$" + methodMetaGroup.uniqueNum() + '$'
                    + methodMetaInternalName.replace('/', '$');
            FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_FINAL + ACC_STATIC, methodMetaFieldName,
                    "L" + methodMetaInternalName + ";", null, null);
            fv.visitEnd();
            mv.visitTypeInsn(NEW, methodMetaInternalName);
            mv.visitInsn(DUP);
            loadType(mv, type, metaHolderType);
            loadType(mv, methodMetaGroup.returnType(), metaHolderType);

            mv.visitIntInsn(BIPUSH, methodMetaGroup.parameterTypes().size());
            mv.visitTypeInsn(ANEWARRAY, "java/lang/Class");
            for (int i = 0; i < methodMetaGroup.parameterTypes().size(); i++) {
                mv.visitInsn(DUP);
                mv.visitIntInsn(BIPUSH, i);
                loadType(mv, methodMetaGroup.parameterTypes().get(i), metaHolderType);
                mv.visitInsn(AASTORE);
            }

            mv.visitMethodInsn(INVOKESPECIAL, methodMetaInternalName, "<init>",
                    "(Ljava/lang/Class;Ljava/lang/Class;[Ljava/lang/Class;)V", false);
            mv.visitFieldInsn(PUTSTATIC, metaHolderInternalName, methodMetaFieldName,
                    "L" + methodMetaInternalName + ";");
        }
    }
    // this is just try/catch ClassNotFoundException/re-throw AssertionError
    mv.visitLabel(l1);
    Label l3 = new Label();
    mv.visitJumpInsn(GOTO, l3);
    mv.visitLabel(l2);
    mv.visitFrame(F_SAME1, 0, null, 1, new Object[] { "java/lang/ClassNotFoundException" });
    mv.visitVarInsn(ASTORE, 0);
    mv.visitTypeInsn(NEW, "java/lang/AssertionError");
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/AssertionError", "<init>", "(Ljava/lang/Object;)V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l3);
    mv.visitFrame(F_SAME, 0, null, 0, null);

    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
    cw.visitEnd();
    byte[] bytes = cw.toByteArray();
    ClassLoaders.defineClass(ClassNames.fromInternalName(metaHolderInternalName), bytes, loader);
}

From source file:org.graalvm.compiler.core.test.SubWordInputTest2.java

License:Open Source License

@Override
protected byte[] generateClass(String internalClassName) {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    cw.visit(52, ACC_SUPER | ACC_PUBLIC, internalClassName, null, "java/lang/Object", null);

    final char typeChar = kind.getTypeChar();
    String getDescriptor = "(" + typeChar + ")" + "Z";
    MethodVisitor get = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, GET, getDescriptor, null, null);
    get.visitCode();/*from   w  ww  .  ja  va2 s . co m*/
    get.visitVarInsn(ILOAD, 0);
    Label label = new Label();
    get.visitJumpInsn(IFGE, label);
    get.visitInsn(ICONST_0);
    get.visitInsn(IRETURN);
    get.visitLabel(label);
    get.visitInsn(ICONST_1);
    get.visitInsn(IRETURN);
    get.visitMaxs(1, 1);
    get.visitEnd();

    MethodVisitor snippet = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, WRAPPER, "(I)Z", null, null);
    snippet.visitCode();
    snippet.visitVarInsn(ILOAD, 0);
    snippet.visitMethodInsn(INVOKESTATIC, internalClassName, GET, getDescriptor, false);
    snippet.visitInsn(IRETURN);
    snippet.visitMaxs(1, 1);
    snippet.visitEnd();

    cw.visitEnd();
    return cw.toByteArray();
}

From source file:org.graalvm.compiler.core.test.SubWordTestUtil.java

License:Open Source License

static void testEqual(MethodVisitor snippet) {
    Label label = new Label();
    snippet.visitJumpInsn(IF_ICMPNE, label);
    snippet.visitInsn(ICONST_1);//from  w  w w . j a  va 2  s  .c o  m
    snippet.visitInsn(IRETURN);
    snippet.visitLabel(label);
    snippet.visitInsn(ICONST_0);
    snippet.visitInsn(IRETURN);
}