Example usage for org.objectweb.asm Opcodes V1_7

List of usage examples for org.objectweb.asm Opcodes V1_7

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In this page you can find the example usage for org.objectweb.asm Opcodes V1_7.

Prototype

int V1_7

To view the source code for org.objectweb.asm Opcodes V1_7.

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Usage

From source file:br.usp.each.saeg.badua.core.internal.ContentTypeDetector.java

License:Open Source License

private static int determineType(final InputStream in) throws IOException {
    final int header = readInt(in);
    switch (header) {
    case ZIPFILE:
        return ZIPFILE;
    case PACK200FILE:
        return PACK200FILE;
    case CLASSFILE:
        // also verify version to distinguish from Mach Object files:
        switch (readInt(in)) {
        case Opcodes.V1_1:
        case Opcodes.V1_2:
        case Opcodes.V1_3:
        case Opcodes.V1_4:
        case Opcodes.V1_5:
        case Opcodes.V1_6:
        case Opcodes.V1_7:
        case Opcodes.V1_8:
            return CLASSFILE;
        }//from  w  w w  . ja  va  2 s .c o  m
    }
    if ((header & 0xffff0000) == GZFILE) {
        return GZFILE;
    }
    return UNKNOWN;
}

From source file:co.cask.cdap.internal.app.runtime.batch.distributed.ContainerLauncherGenerator.java

License:Apache License

/**
 * Generates the bytecode for a main class and writes to the given {@link JarOutputStream}.
 * The generated class looks like this://from  ww  w .java2 s .  c  om
 *
 * <pre>{@code
 * class className {
 *   public static void main(String[] args) {
 *     MapReduceContainerLauncher.launch(launcherClassPath, classLoaderName, className, args);
 *   }
 * }
 * }
 * </pre>
 *
 * The {@code launcherClassPath}, {@code classLoaderName} and {@code className} are represented as
 * string literals in the generated class.
 */
private static void generateLauncherClass(String launcherClassPath, String classLoaderName, String className,
        JarOutputStream output) throws IOException {
    String internalName = className.replace('.', '/');

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    classWriter.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, internalName, null,
            Type.getInternalName(Object.class), null);

    Method constructor = Methods.getMethod(void.class, "<init>");

    // Constructor
    // MRAppMaster()
    GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC, constructor, null, null, classWriter);

    mg.loadThis();
    mg.invokeConstructor(Type.getType(Object.class), constructor);
    mg.returnValue();
    mg.endMethod();

    // Main method.
    // public static void main(String[] args) {
    //   MapReduceContainerLauncher.launch(launcherClassPath, classLoaderName, className, args);
    // }
    Method mainMethod = Methods.getMethod(void.class, "main", String[].class);
    mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, mainMethod, null,
            new Type[] { Type.getType(Exception.class) }, classWriter);

    mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
    mg.visitLdcInsn("Launch class " + className);
    mg.invokeVirtual(Type.getType(PrintStream.class), Methods.getMethod(void.class, "println", String.class));

    // The Launcher classpath, classloader name and main classname are stored as string literal in the generated class
    mg.visitLdcInsn(launcherClassPath);
    mg.visitLdcInsn(classLoaderName);
    mg.visitLdcInsn(className);
    mg.loadArg(0);
    mg.invokeStatic(Type.getType(MapReduceContainerLauncher.class),
            Methods.getMethod(void.class, "launch", String.class, String.class, String.class, String[].class));
    mg.returnValue();
    mg.endMethod();

    classWriter.visitEnd();

    output.putNextEntry(new JarEntry(internalName + ".class"));
    output.write(classWriter.toByteArray());
}

From source file:co.cask.cdap.internal.app.runtime.batch.distributed.ContainerLauncherGenerator.java

License:Apache License

/**
 * Generates a class that has a static main method which delegates the call to a static method in the given delegator
 * class with method signature {@code public static void launch(String className, String[] args)}
 *
 * @param className the classname of the generated class
 * @param mainDelegator the class to delegate the main call to
 * @param output for writing the generated bytes
 *///from  ww w . ja  v  a  2 s . c  o  m
private static void generateMainClass(String className, Type mainDelegator, JarOutputStream output)
        throws IOException {
    String internalName = className.replace('.', '/');

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    classWriter.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, internalName, null,
            Type.getInternalName(Object.class), null);

    // Generate the default constructor, which just call super()
    Method constructor = Methods.getMethod(void.class, "<init>");
    GeneratorAdapter mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC, constructor, null, null, classWriter);
    mg.loadThis();
    mg.invokeConstructor(Type.getType(Object.class), constructor);
    mg.returnValue();
    mg.endMethod();

    // Generate the main method
    // public static void main(String[] args) {
    //   System.out.println("Launch class .....");
    //   <MainDelegator>.launch(<className>, args);
    // }
    Method mainMethod = Methods.getMethod(void.class, "main", String[].class);
    mg = new GeneratorAdapter(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, mainMethod, null,
            new Type[] { Type.getType(Exception.class) }, classWriter);

    mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
    mg.visitLdcInsn("Launch class " + className + " by calling " + mainDelegator.getClassName() + ".launch");
    mg.invokeVirtual(Type.getType(PrintStream.class), Methods.getMethod(void.class, "println", String.class));

    // The main classname is stored as string literal in the generated class
    mg.visitLdcInsn(className);
    mg.loadArg(0);
    mg.invokeStatic(mainDelegator, Methods.getMethod(void.class, "launch", String.class, String[].class));
    mg.returnValue();
    mg.endMethod();

    classWriter.visitEnd();

    output.putNextEntry(new JarEntry(internalName + ".class"));
    output.write(classWriter.toByteArray());
}

From source file:com.android.build.gradle.shrinker.parser.ProguardFlags.java

License:Apache License

public void target(@NonNull String target) {
    int version;/*from w ww .  j av a  2 s .c o m*/
    switch (target) {
    case "8":
    case "1.8":
        version = Opcodes.V1_8;
        break;
    case "7":
    case "1.7":
        version = Opcodes.V1_7;
        break;
    case "6":
    case "1.6":
        version = Opcodes.V1_6;
        break;
    case "5":
    case "1.5":
        version = Opcodes.V1_5;
        break;
    case "1.4":
        version = Opcodes.V1_4;
        break;
    case "1.3":
        version = Opcodes.V1_3;
        break;
    case "1.2":
        version = Opcodes.V1_2;
        break;
    case "1.1":
        version = Opcodes.V1_1;
        break;
    default:
        throw new AssertionError("Unknown target " + target);
    }

    this.bytecodeVersion = new BytecodeVersion(version);
}

From source file:com.changingbits.Builder.java

License:Apache License

/** Build a {@link LongRangeMultiSet} implementation to
 *  lookup intervals for a given point./*w w w  .j a  va2  s  .  c o  m*/
 *
 *  @param useAsm If true, the tree will be compiled to
 *  java bytecodes using the {@code asm} library; typically
 *  this results in a faster (~3X) implementation. */
public LongRangeMultiSet getMultiSet(boolean useAsm, boolean useArrayImpl) {

    finish(useArrayImpl);

    if (useAsm) {
        StringBuilder sb = new StringBuilder();
        sb.append('\n');
        int count = 0;
        for (LongRange range : ranges) {
            sb.append("// range ");
            sb.append(count++);
            sb.append(": ");
            sb.append(range);
            sb.append('\n');
        }
        sb.append('\n');
        sb.append("int upto = 0;\n");
        buildJavaSource(root, 0, sb);
        String javaSource = sb.toString();
        //System.out.println("java: " + javaSource);

        ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
        classWriter.visit(Opcodes.V1_7,
                Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC,
                COMPILED_TREE_CLASS.replace('.', '/'), null, LONG_RANGE_MULTI_SET_TYPE.getInternalName(), null);
        classWriter.visitSource(javaSource, null);

        Method m = Method.getMethod("void <init> ()");
        GeneratorAdapter constructor = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, m, null,
                null, classWriter);
        constructor.loadThis();
        constructor.loadArgs();
        constructor.invokeConstructor(LONG_RANGE_MULTI_SET_TYPE, m);
        constructor.returnValue();
        constructor.endMethod();

        GeneratorAdapter gen = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, LOOKUP_METHOD,
                null, null, classWriter);
        //Label labelTop = new Label();
        //Label labelEnd = new Label();
        //gen.visitLabel(labelTop);
        int uptoLocal = gen.newLocal(Type.INT_TYPE);
        //System.out.println("uptoLocal=" + uptoLocal);
        // nocommit is this not needed!?
        //gen.visitLocalVariable("upto", "I", null, labelTop, labelEnd, uptoLocal);
        gen.push(0);
        gen.storeLocal(uptoLocal, Type.INT_TYPE);
        buildAsm(gen, root, uptoLocal);
        // Return upto:
        gen.loadLocal(uptoLocal, Type.INT_TYPE);
        gen.returnValue();
        //gen.visitLabel(labelEnd);
        gen.endMethod();
        classWriter.visitEnd();

        byte[] bytes = classWriter.toByteArray();

        // javap -c /x/tmp/my.class
        /*
        try {
          FileOutputStream fos = new FileOutputStream(new File("/x/tmp/my.class"));
          fos.write(bytes);
          fos.close();
        } catch (Exception e) {
          throw new RuntimeException(e);
        }
        */

        // nocommit allow changing the class loader
        Class<? extends LongRangeMultiSet> treeClass = new Loader(LongRangeMultiSet.class.getClassLoader())
                .define(COMPILED_TREE_CLASS, classWriter.toByteArray());
        try {
            return treeClass.getConstructor().newInstance();
        } catch (InstantiationException | IllegalAccessException | NoSuchMethodException
                | InvocationTargetException e) {
            throw new RuntimeException(e);
        }

    } else if (useArrayImpl) {
        return new ArrayLongRangeMultiSet(root);
    } else {
        return new SimpleLongRangeMultiSet(root);
    }
}

From source file:com.changingbits.Builder.java

License:Apache License

public LongRangeCounter getCounter(boolean useAsm) {
    finish(false);/*from w  w  w.  ja  v a2s  .  co m*/
    if (useAsm) {
        StringBuilder sb = new StringBuilder();
        sb.append('\n');
        int count = 0;
        for (LongRange range : ranges) {
            sb.append("// range ");
            sb.append(count++);
            sb.append(": ");
            sb.append(range);
            sb.append('\n');
        }
        sb.append('\n');
        buildJavaCounterSource(root, 0, sb, false);
        String javaSource = sb.toString();
        //System.out.println("javaSource:\n" + javaSource);

        ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
        classWriter.visit(Opcodes.V1_7,
                Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC,
                COMPILED_COUNTER_CLASS.replace('.', '/'), null, BASE_LONG_RANGE_COUNTER_TYPE.getInternalName(),
                null);
        classWriter.visitSource(javaSource, null);
        Method m = Method.getMethod("void <init> (com.changingbits.Node, int, int)");
        GeneratorAdapter constructor = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, m, null,
                null, classWriter);
        constructor.loadThis();
        constructor.loadArgs();
        constructor.invokeConstructor(Type.getType(BaseLongRangeCounter.class), m);
        constructor.returnValue();
        constructor.endMethod();

        GeneratorAdapter gen = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, ADD_METHOD,
                null, null, classWriter);
        buildCounterAsm(gen, root, false);
        gen.returnValue();
        gen.endMethod();
        classWriter.visitEnd();

        byte[] bytes = classWriter.toByteArray();

        // javap -c /x/tmp/my.class
        /*
        try {
          FileOutputStream fos = new FileOutputStream(new File("/x/tmp/counter.class"));
          fos.write(bytes);
          fos.close();
        } catch (Exception e) {
          throw new RuntimeException(e);
        }
        */

        // nocommit allow changing the class loader
        Class<? extends LongRangeCounter> cl = new CounterLoader(LongRangeCounter.class.getClassLoader())
                .define(COMPILED_COUNTER_CLASS, classWriter.toByteArray());
        try {
            return cl.getConstructor(Node.class, int.class, int.class).newInstance(root,
                    elementaryIntervals.size(), ranges.length);
        } catch (InstantiationException | IllegalAccessException | NoSuchMethodException
                | InvocationTargetException e) {
            throw new RuntimeException(e);
        }
    } else {
        return new SimpleLongRangeCounter(root, elementaryIntervals, ranges.length);
    }
}

From source file:com.changingbits.Builder.java

License:Apache License

public LongRangeCounter getCounter2() {
    finish(false);/*from  w  ww .j a  v a  2s.  c  o  m*/

    // Maps each range to the leaf counts that contribute to it:
    Map<Integer, List<Integer>> rangeToLeaf = new HashMap<>();
    buildRangeToLeaf(root, new ArrayList<Integer>(), rangeToLeaf);

    StringBuilder sb = new StringBuilder();
    sb.append('\n');
    sb.append("public void add(long v) {\n");
    int count = 0;
    for (LongRange range : ranges) {
        sb.append("  // range ");
        sb.append(count++);
        sb.append(": ");
        sb.append(range);
        sb.append('\n');
    }

    buildJavaCounter2Source(root, 1, sb, false);

    sb.append("}\n\n");
    sb.append("public int[] getCounts() {\n");
    sb.append("  int[] counts = new int[");
    sb.append(ranges.length);
    sb.append("];\n");
    for (int range = 0; range < ranges.length; range++) {
        List<Integer> elements = rangeToLeaf.get(range);
        if (elements != null) {
            sb.append("  counts[");
            sb.append(range);
            sb.append("] = count");
            sb.append(elements.get(0));

            for (int i = 1; i < elements.size(); i++) {
                sb.append(" + count");
                sb.append(elements.get(i));
            }
            sb.append(";\n");
        }
    }
    sb.append("  return counts;\n}\n");

    String javaSource = sb.toString();
    //System.out.println("counter2 javaSource:\n" + javaSource);

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
    classWriter.visit(Opcodes.V1_7,
            Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC,
            COMPILED_COUNTER_CLASS2.replace('.', '/'), null, LONG_RANGE_COUNTER_TYPE.getInternalName(), null);
    classWriter.visitSource(javaSource, null);

    // Define "int countN" members:
    int numLeaves = elementaryIntervals.size();
    for (int i = 0; i < numLeaves; i++) {
        classWriter.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_SYNTHETIC, "count" + i, "I", null, null);
    }

    // init:
    Method m = Method.getMethod("void <init> ()");
    GeneratorAdapter constructor = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, m, null,
            null, classWriter);
    // Init all counters to 0:
    for (int i = 0; i < numLeaves; i++) {
        constructor.loadThis();
        constructor.push(0);
        constructor.putField(COMPILED_COUNTER_CLASS2_TYPE, "count" + i, Type.INT_TYPE);
    }
    constructor.loadThis();
    constructor.invokeConstructor(LONG_RANGE_COUNTER_TYPE, m);
    constructor.returnValue();
    constructor.endMethod();

    // void add(long v):
    GeneratorAdapter gen = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, ADD_METHOD, null,
            null, classWriter);
    buildCounterAsm2(gen, root, false);
    gen.returnValue();
    gen.endMethod();

    // int[] getCounts():
    gen = new GeneratorAdapter(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, GET_COUNTS_METHOD, null, null,
            classWriter);
    int countsLocal = gen.newLocal(INT_ARRAY_TYPE);
    gen.push(ranges.length);
    gen.newArray(Type.INT_TYPE);
    gen.storeLocal(countsLocal);

    for (int range = 0; range < ranges.length; range++) {
        List<Integer> elements = rangeToLeaf.get(range);
        if (elements != null) {
            gen.loadLocal(countsLocal);
            gen.push(range);

            gen.loadThis();
            gen.getField(COMPILED_COUNTER_CLASS2_TYPE, "count" + elements.get(0), Type.INT_TYPE);

            for (int i = 1; i < elements.size(); i++) {
                gen.loadThis();
                gen.getField(COMPILED_COUNTER_CLASS2_TYPE, "count" + elements.get(i), Type.INT_TYPE);
                gen.visitInsn(Opcodes.IADD);
            }

            gen.arrayStore(Type.INT_TYPE);
        }
    }

    gen.loadLocal(countsLocal);
    gen.returnValue();
    gen.endMethod();

    classWriter.visitEnd();

    byte[] bytes = classWriter.toByteArray();

    // javap -c /x/tmp/my.class
    /*
    try {
      FileOutputStream fos = new FileOutputStream(new File("/x/tmp/counter2.class"));
      fos.write(bytes);
      fos.close();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
    */

    // nocommit allow changing the class loader
    Class<? extends LongRangeCounter> cl = new CounterLoader(LongRangeCounter.class.getClassLoader())
            .define(COMPILED_COUNTER_CLASS2, classWriter.toByteArray());
    try {
        return cl.getConstructor().newInstance();
    } catch (InstantiationException | IllegalAccessException | NoSuchMethodException
            | InvocationTargetException e) {
        throw new RuntimeException(e);
    }
}

From source file:com.facebook.buck.jvm.java.abi.ClassVisitorDriverFromElement.java

License:Apache License

/** Gets the class file version corresponding to the given source version constant. */
private static int sourceVersionToClassFileVersion(SourceVersion version) {
    switch (version) {
    case RELEASE_0:
        return Opcodes.V1_1; // JVMS8 4.1: 1.0 and 1.1 both support version 45.3 (Opcodes.V1_1)
    case RELEASE_1:
        return Opcodes.V1_1;
    case RELEASE_2:
        return Opcodes.V1_2;
    case RELEASE_3:
        return Opcodes.V1_3;
    case RELEASE_4:
        return Opcodes.V1_4;
    case RELEASE_5:
        return Opcodes.V1_5;
    case RELEASE_6:
        return Opcodes.V1_6;
    case RELEASE_7:
        return Opcodes.V1_7;
    case RELEASE_8:
        return Opcodes.V1_8;
    default:// w w w .  j  ava 2  s.co  m
        throw new IllegalArgumentException(String.format("Unexpected source version: %s", version));
    }
}

From source file:com.facebook.buck.jvm.java.abi.SourceVersionUtils.java

License:Apache License

/** Gets the class file version corresponding to the given source version constant. */
public static int sourceVersionToClassFileVersion(SourceVersion version) {
    switch (version) {
    case RELEASE_0:
        return Opcodes.V1_1; // JVMS8 4.1: 1.0 and 1.1 both support version 45.3 (Opcodes.V1_1)
    case RELEASE_1:
        return Opcodes.V1_1;
    case RELEASE_2:
        return Opcodes.V1_2;
    case RELEASE_3:
        return Opcodes.V1_3;
    case RELEASE_4:
        return Opcodes.V1_4;
    case RELEASE_5:
        return Opcodes.V1_5;
    case RELEASE_6:
        return Opcodes.V1_6;
    case RELEASE_7:
        return Opcodes.V1_7;
    case RELEASE_8:
        return Opcodes.V1_8;
    default:/*from  ww w  . j a  va2s. c  o  m*/
        throw new IllegalArgumentException(String.format("Unexpected source version: %s", version));
    }
}

From source file:com.gargoylesoftware.js.nashorn.internal.runtime.linker.JavaAdapterBytecodeGenerator.java

License:Open Source License

/**
 * Creates a generator for the bytecode for the adapter for the specified superclass and interfaces.
 * @param superClass the superclass the adapter will extend.
 * @param interfaces the interfaces the adapter will implement.
 * @param commonLoader the class loader that can see all of superClass, interfaces, and Nashorn classes.
 * @param classOverride true to generate the bytecode for the adapter that has class-level overrides, false to
 * generate the bytecode for the adapter that has instance-level overrides.
 * @throws AdaptationException if the adapter can not be generated for some reason.
 *///from  ww w.  j  a v  a2  s  .  c o m
JavaAdapterBytecodeGenerator(final Class<?> superClass, final List<Class<?>> interfaces,
        final ClassLoader commonLoader, final boolean classOverride) throws AdaptationException {
    assert superClass != null && !superClass.isInterface();
    assert interfaces != null;

    this.superClass = superClass;
    this.interfaces = interfaces;
    this.classOverride = classOverride;
    this.commonLoader = commonLoader;
    cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS) {
        @Override
        protected String getCommonSuperClass(final String type1, final String type2) {
            // We need to override ClassWriter.getCommonSuperClass to use this factory's commonLoader as a class
            // loader to find the common superclass of two types when needed.
            return JavaAdapterBytecodeGenerator.this.getCommonSuperClass(type1, type2);
        }
    };
    superClassName = Type.getInternalName(superClass);
    generatedClassName = getGeneratedClassName(superClass, interfaces);

    cw.visit(Opcodes.V1_7, ACC_PUBLIC | ACC_SUPER, generatedClassName, null, superClassName,
            getInternalTypeNames(interfaces));
    generateGlobalFields();

    gatherMethods(superClass);
    gatherMethods(interfaces);
    samName = abstractMethodNames.size() == 1 ? abstractMethodNames.iterator().next() : null;
    generateHandleFields();
    generateConverterFields();
    if (classOverride) {
        generateClassInit();
    }
    generateConstructors();
    generateMethods();
    generateSuperMethods();
    if (hasExplicitFinalizer) {
        generateFinalizerMethods();
    }
    // }
    cw.visitEnd();
}