Example usage for org.objectweb.asm Label Label

Introduction

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

Prototype

public Label() 

Source Link

Document

Constructs a new label.

Usage

From source file:com.weibo.lodil.mmap.impl.GenerateHugeArrays.java

License:Apache License

public static byte[] dumpImpl(final TypeModel tm) {

    final ClassWriter cw = new ClassWriter(0);
    FieldVisitor fv;//w w  w  . j a  v a 2 s.  c o  m
    MethodVisitor mv;

    final String name = tm.bcType();

    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, name + "Impl",
            "Ljava/lang/Object;L" + name + ";L" + collections + "api/HugeElement<L" + name
                    + ";>;Ljava/io/Externalizable;",
            "java/lang/Object",
            new String[] { name, collections + "api/HugeElement", "java/io/Externalizable" });

    cw.visitSource(tm.getClass().getSimpleName() + "Impl.java", null);

    for (final FieldModel fm : tm.fields()) {
        fv = cw.visitField(ACC_PRIVATE, "m_" + fm.fieldName(), fm.bcLFieldType(), null, null);
        fv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(30, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
        mv.visitInsn(RETURN);
        final Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l0, l1, 0);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    for (final FieldModel fm : tm.fields()) {
        mv = cw.visitMethod(ACC_PUBLIC, "set" + fm.titleFieldName(), "(" + fm.bcLFieldType() + ")V", null,
                null);
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(47, l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(loadFor(fm.bcType()), 1);
        mv.visitFieldInsn(PUTFIELD, name + "Impl", "m_" + fm.fieldName(), fm.bcLFieldType());
        final Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLineNumber(48, l1);
        mv.visitInsn(RETURN);
        final Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l0, l2, 0);
        mv.visitLocalVariable("b", fm.bcLFieldType(), null, l0, l2, 1);
        mv.visitMaxs(1 + fm.bcFieldSize(), 1 + fm.bcFieldSize());
        mv.visitEnd();

        mv = cw.visitMethod(ACC_PUBLIC, "get" + fm.titleFieldName(), "()" + fm.bcLFieldType(), null, null);
        mv.visitCode();
        final Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLineNumber(45, l3);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, name + "Impl", "m_" + fm.fieldName(), fm.bcLFieldType());
        mv.visitInsn(returnFor(fm.bcType()));
        final Label l4 = new Label();
        mv.visitLabel(l4);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l3, l4, 0);
        mv.visitMaxs(1 + fm.bcFieldSize(), 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "index", "(J)V", null, null);
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(175, l0);
        mv.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>", "()V");
        mv.visitInsn(ATHROW);
        final Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l0, l1, 0);
        mv.visitLocalVariable("n", "J", null, l0, l1, 1);
        mv.visitMaxs(2, 3);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "index", "()J", null, null);
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(180, l0);
        mv.visitInsn(LCONST_0);
        mv.visitInsn(LRETURN);
        final Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l0, l1, 0);
        mv.visitMaxs(2, 1);
        mv.visitEnd();
    }
    appendToStringHashCodeEqualsCopyOf(tm, cw, name + "Impl", false);

    {
        mv = cw.visitMethod(ACC_PUBLIC, "hugeElementType", "()L" + collections + "api/HugeElementType;", null,
                null);
        mv.visitCode();
        final Label l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(236, l0);
        mv.visitFieldInsn(GETSTATIC, collections + "api/HugeElementType", "BeanImpl",
                "L" + collections + "api/HugeElementType;");
        mv.visitInsn(ARETURN);
        final Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLocalVariable("this", "L" + name + "Impl;", null, l0, l1, 0);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    cw.visitEnd();

    final byte[] bytes = cw.toByteArray();
    // ClassReader cr = new ClassReader(bytes);
    // cr.accept(new ASMifierClassVisitor(new PrintWriter(System.out)), 0);

    return bytes;
}

---

From source file:com.wordpress.thesolidsnake.bahasaku.target.jvm.BahasaKuVisitor.java

License:Apache License

public BahasaKuVisitor(File sourceFile, boolean enableTrace) {

    this.sourceFile = sourceFile;
    if (!sourceFile.getName().endsWith(".baku")) {
        throw new RuntimeException(
                "Nama source file [" + sourceFile.getName() + "] tidak diakhiri dengan .baku");
    }//from  www .j ava 2 s  . co  m
    this.namaSourceFile = sourceFile.getName().substring(0, sourceFile.getName().lastIndexOf('.'));
    this.enableTrace = enableTrace;
    this.namaVariabel = new ArrayList<>();

    cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    if (enableTrace) {
        cv = new TraceClassVisitor(cw, new PrintWriter(System.out));
    } else {
        cv = cw;
    }

    // Membuat sebuah class public dengan nama (tanpa package) sesuai dengan namaFile
    cv.visit(V1_7, ACC_PUBLIC + ACC_SUPER, namaSourceFile, null, "java/lang/Object", null);

    // Membuat method static void main(String[] args).
    // Seluruh implementasi kode program BahasaKu akan ada di method ini.
    mv = cv.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
    mv.visitCode();
    label0 = new Label();
    mv.visitLabel(label0);

}

---

From source file:com.wordpress.thesolidsnake.bahasaku.target.jvm.BahasaKuVisitor.java

License:Apache License

public void generateOutput() {
    mv.visitInsn(RETURN);// ww  w .j  a v a2 s .  co m
    Label label = new Label();
    mv.visitLabel(label);
    for (int i = 0; i < namaVariabel.size(); i++) {
        mv.visitLocalVariable(namaVariabel.get(i), "Ljava/lang/Object;", null, label0, label, i);
    }
    mv.visitMaxs(0, 0);
    mv.visitEnd();
    cv.visitEnd();

    Path targetFile = Paths.get(sourceFile.getAbsoluteFile().getParent().toString(), namaSourceFile + ".class");
    System.out.println("Menghasilkan target file di lokasi: " + targetFile.toString() + "\n");
    try {
        Files.write(targetFile, cw.toByteArray(), StandardOpenOption.CREATE,
                StandardOpenOption.TRUNCATE_EXISTING);
    } catch (Exception ex) {
        System.out.println("Terjadi kesalahan saat membuat file target!");
        ex.printStackTrace();
    }
}

---

From source file:com.xruby.compiler.codegen.MethodGenerator.java

License:BSD License

public void returnIfBlockReturned() {
    dup();//from  ww w  .  j  a va  2  s .c  om
    invokeVirtual(Types.RUBY_VALUE_TYPE, Method.getMethod("boolean returnedInBlock()"));
    Label after_return = new Label();
    ifZCmp(GeneratorAdapter.EQ, after_return);
    returnValue();//TODO more error checking, may not in the method context
    mark(after_return);
    /*TODO if it is going to return any way, should not not check.
      Right now the code may look like:
      if(!rubyvalue5.returnedInBlock()) goto _L2; else goto _L1
      _L1:
              return;
      _L2:
              return;
      */
}

---

From source file:com.xruby.compiler.codegen.MethodGenerator.java

License:BSD License

public void checkBreakedOrReturned(boolean is_in_block) {
    int value = newLocal(Types.RUBY_VALUE_TYPE);
    storeLocal(value);/*from  w  ww  .j a va2 s.  co  m*/

    invokeVirtual(Types.RUBY_BLOCK_TYPE, CgUtil.getMethod("breakedOrReturned", Type.BOOLEAN_TYPE));
    Label after_return = new Label();
    ifZCmp(GeneratorAdapter.EQ, after_return);
    if (is_in_block) {
        loadThis();
        push(true);
        putField(Types.RUBY_BLOCK_TYPE, "__break__", Type.BOOLEAN_TYPE);
    }
    loadLocal(value);
    returnValue();//TODO more error checking, may not in the method context
    mark(after_return);
    loadLocal(value);
}

---

From source file:com.xruby.compiler.codegen.RubyCompilerImpl.java

License:BSD License

public void visitMethodDefinitionDefaultParameters(int size) {
    assert (size > 0);
    //create a empty array if arg is null (avoid null reference)
    MethodGenerator mg = cg_.getMethodGenerator();
    mg.loadArg(1);/*ww  w.  j a v a  2  s. c  o m*/
    Label label = new Label();
    mg.ifNonNull(label);
    mg.ObjectFactory_createArray(size, 0, false);
    mg.storeArg(1);
    mg.mark(label);
}

---

From source file:com.xruby.compiler.codegen.RubyCompilerImpl.java

License:BSD License

public Object visitMethodDefinitionDefaultParameterBegin(int index) {
    Label next_label = new Label();

    MethodGenerator mg = cg_.getMethodGenerator();
    mg.loadMethodPrameterLength();/*from   w w  w .  ja v  a 2 s.  c om*/
    mg.push(index);
    mg.ifICmp(GeneratorAdapter.GT, next_label);

    mg.loadArg(1);

    return next_label;
}

---

From source file:com.xruby.compiler.codegen.RubyCompilerImpl.java

License:BSD License

public Object visitAfterIfCondition() {
    MethodGenerator mg = cg_.getMethodGenerator();
    mg.RubyValue_isTrue();//www . j  a  v a 2  s .  c om
    Label label = new Label();
    mg.ifZCmp(GeneratorAdapter.EQ, label);
    return label;
}

---

From source file:com.xruby.compiler.codegen.RubyCompilerImpl.java

License:BSD License

public Object visitAfterIfBody(Object next_label, Object end_label) {
    if (null == end_label) {
        end_label = new Label();
    }/*from  ww w .j av  a2s . c  o  m*/

    MethodGenerator mg = cg_.getMethodGenerator();
    if (null != next_label) {
        mg.goTo((Label) end_label);
        mg.mark((Label) next_label);
    } else {
        mg.mark((Label) end_label);
    }

    return end_label;
}

---

From source file:com.xruby.compiler.codegen.RubyCompilerImpl.java

License:BSD License

public Object visitAfterWhenCondition(Object case_value, boolean mrhs) {
    int i = (Integer) case_value;
    MethodGenerator mg = cg_.getMethodGenerator();
    mg.loadLocal(i);/*from w w w  . j a  va  2 s.c o m*/
    if (!mrhs) {
        mg.RubyAPI_testCaseEqual();
    } else {
        mg.RubyAPI_testCaseEqual2();
    }
    Label label = new Label();
    mg.ifZCmp(GeneratorAdapter.EQ, label);
    return label;
}

---

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