当前位置: 首页>>代码示例>>Java>>正文

Java ClassWriter.visit方法代码示例

本文整理汇总了Java中jdk.internal.org.objectweb.asm.ClassWriter.visit方法的典型用法代码示例。如果您正苦于以下问题：Java ClassWriter.visit方法的具体用法？Java ClassWriter.visit怎么用？Java ClassWriter.visit使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类jdk.internal.org.objectweb.asm.ClassWriter的用法示例。


在下文中一共展示了ClassWriter.visit方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: generateClass

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
/**
 * Generates a class file with the given class name
 */
byte[] generateClass(String className) {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
                                     + ClassWriter.COMPUTE_FRAMES);
    cw.visit(V1_9,
            ACC_PUBLIC + ACC_SUPER,
            className.replace(".", "/"),
            null,
            "java/lang/Object",
            null);

    // <init>
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:25，代码来源:DefineClassTest.java

示例2: getClassFile

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
static byte[] getClassFile(String suffix) {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;
    cw.visit(52, ACC_PUBLIC | ACC_SUPER, CLASS_NAME + suffix, null, "java/lang/Object", null);
    {
        mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, METHOD_NAME, TYPE.toMethodDescriptorString(), null, null);
        mv.visitCode();
        Handle bsm = new Handle(H_INVOKESTATIC,
                CallSiteDepContextTest.class.getName().replace(".", "/"),
                "bootstrap",
                bsmMH.type().toMethodDescriptorString());
        mv.visitInvokeDynamicInsn("methodName", TYPE.toMethodDescriptorString(), bsm);
        mv.visitInsn(IRETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:20，代码来源:CallSiteDepContextTest.java

示例3: badHostClass

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
static public void badHostClass(Class<?> hostClass) {
    // choose a class name in the same package as the host class
    String className;
    if (hostClass != null) {
        String prefix = packageName(hostClass);
        if (prefix.length() > 0)
            prefix = prefix.replace('.', '/') + "/";
        className = prefix + "Anon";
    } else {
       className = "Anon";
    }

    // create the class
    String superName = "java/lang/Object";
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
                                     + ClassWriter.COMPUTE_FRAMES);
    cw.visit(V1_8, ACC_PUBLIC + ACC_FINAL + ACC_SUPER,
             className, null, superName, null);
    byte[] classBytes = cw.toByteArray();
    int cpPoolSize = constantPoolSize(classBytes);
    Class<?> anonClass
        = unsafe.defineAnonymousClass(hostClass, classBytes, new Object[cpPoolSize]);
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:24，代码来源:TestBadHostClass.java

示例4: verifyASM

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
static void verifyASM() throws Exception {
    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_8, ACC_PUBLIC, "X", null, "java/lang/Object", null);
    MethodVisitor mv = cw.visitMethod(ACC_STATIC, "foo",
            "()V", null, null);
    mv.visitMaxs(2, 1);
    mv.visitMethodInsn(INVOKESTATIC,
            "java/util/function/Function.class",
            "identity", "()Ljava/util/function/Function;", true);
    mv.visitInsn(RETURN);
    cw.visitEnd();
    byte[] carray = cw.toByteArray();
    // for debugging
    // write((new File("X.class")).toPath(), carray, CREATE, TRUNCATE_EXISTING);

    // verify using javap/classfile reader
    ClassFile cf = ClassFile.read(new ByteArrayInputStream(carray));
    int mcount = checkMethod(cf, "foo");
    if (mcount < 1) {
        throw new RuntimeException("unexpected method count, expected 1" +
                "but got " + mcount);
    }
}
开发者ID:JetBrains，项目名称:jdk8u_jdk，代码行数:24，代码来源:LambdaAsm.java

示例5: writeClassFile

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
public static void writeClassFile() throws Exception {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(99, ACC_PUBLIC + ACC_SUPER, "ClassFile", null, "java/lang/Object", null);
    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(1, 1);
    mv.visitEnd();
    cw.visitEnd();

    try (FileOutputStream fos = new FileOutputStream(new File("ClassFile.class"))) {
         fos.write(cw.toByteArray());
    }
}
开发者ID:ojdkbuild，项目名称:lookaside_java-1.8.0-openjdk，代码行数:19，代码来源:UnsupportedClassFileVersion.java

示例6: createClass

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
private static Class<?> createClass() {
    try {
        ClassWriter cw = new ClassWriter(0);
        cw.visit(Opcodes.V1_8,
                 Opcodes.ACC_FINAL + Opcodes.ACC_SUPER,
                 UNNAMED,
                 null,
                 OBJECT,
                 null);
        cw.visitSource(UNNAMED, null);
        cw.visitEnd();
        byte[] bytes = cw.toByteArray();
        ClassLoader loader = new ClassLoader(null) {
            @Override
            protected Class<?> findClass(String cn) throws ClassNotFoundException {
                if (cn.equals(UNNAMED))
                    return super.defineClass(UNNAMED, bytes, 0, bytes.length);
                throw new ClassNotFoundException(cn);
            }
        };
        return loader.loadClass(UNNAMED);
    } catch (Exception e) {
        throw new InternalError(e);
    }
}
开发者ID:campolake，项目名称:openjdk9，代码行数:26，代码来源:MethodHandles.java

示例7: loadClassData

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
private byte[] loadClassData(String name) throws Exception {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;
    switch (name) {
        case INTERFACE_NAME:
            cw.visit(V1_8, ACC_ABSTRACT | ACC_INTERFACE | ACC_PUBLIC, INTERFACE_NAME, null, "java/lang/Object", null);
            {
                mv = cw.visitMethod(ACC_PRIVATE, "privInstance", "()I", null, null);
                mv.visitCode();
                mv.visitLdcInsn(EXPECTED);
                mv.visitInsn(IRETURN);
                mv.visitMaxs(1, 1);
                mv.visitEnd();
            }
            break;
        case CLASS_NAME:
            cw.visit(52, ACC_SUPER | ACC_PUBLIC, CLASS_NAME, null, "java/lang/Object", new String[]{INTERFACE_NAME});
            {
                mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
                mv.visitCode();
                mv.visitVarInsn(ALOAD, 0);
                mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
                mv.visitInsn(RETURN);
                mv.visitMaxs(1, 1);
                mv.visitEnd();
            }
            break;
        default:
            break;
    }
    cw.visitEnd();

    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:35，代码来源:TestPrivateInterfaceMethodReflect.java

示例8: dumpT1

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
public static byte[] dumpT1() {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;

    cw.visit(52, ACC_PUBLIC | ACC_SUPER, "p1/T1", null, "java/lang/Object", null);
    {
        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(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
        mv.visitCode();
        mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
        mv.visitLdcInsn("p1/T1.m()");
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false);
        mv.visitIntInsn(BIPUSH, 3);
        mv.visitInsn(IRETURN);
        mv.visitMaxs(2, 1);
        mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:30，代码来源:TestConcreteClassWithAbstractMethod.java

示例9: generateTestClass

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
private static byte[] generateTestClass() {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

    cw.visit(TestOSRWithNonEmptyStack.CLASS_FILE_VERSION, ACC_PUBLIC,
            TestOSRWithNonEmptyStack.CLASS_NAME, null, "java/lang/Object",
            null);

    TestOSRWithNonEmptyStack.generateConstructor(cw);
    TestOSRWithNonEmptyStack.generateTestMethod(cw);

    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:14，代码来源:TestOSRWithNonEmptyStack.java

示例10: generateInvokerTemplate

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
/** Produces byte code for a class that is used as an injected invoker. */
private static byte[] generateInvokerTemplate() {
    ClassWriter cw = new ClassWriter(0);

    // private static class InjectedInvoker {
    //     @Hidden
    //     static Object invoke_V(MethodHandle vamh, Object[] args) throws Throwable {
    //        return vamh.invokeExact(args);
    //     }
    // }
    cw.visit(52, ACC_PRIVATE | ACC_SUPER, "InjectedInvoker", null, "java/lang/Object", null);

    MethodVisitor mv = cw.visitMethod(ACC_STATIC, "invoke_V",
                  "(Ljava/lang/invoke/MethodHandle;[Ljava/lang/Object;)Ljava/lang/Object;",
                  null, null);

    // Suppress invoker method in stack traces.
    AnnotationVisitor av0 = mv.visitAnnotation("Ljava/lang/invoke/LambdaForm$Hidden;", true);
    av0.visitEnd();

    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "invokeExact",
                       "([Ljava/lang/Object;)Ljava/lang/Object;", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();

    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:33，代码来源:MethodHandleImpl.java

示例11: generateStringMaker

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
private static byte[] generateStringMaker() {
    // interface StringMaker extends Maker {
    //   String make();
    // }
    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_7, ACC_INTERFACE | ACC_ABSTRACT, "StringMaker", null, "java/lang/Object", new String[]{"Maker"});
    cw.visitMethod(ACC_PUBLIC | ACC_ABSTRACT, "make",
            "()Ljava/lang/String;", null, null);
    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:12，代码来源:LambdaStackTrace.java

示例12: defineIndyBootstrapMethodClass

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
void defineIndyBootstrapMethodClass(ClassWriter cw) {
    cw.visit(52, ACC_SUPER | ACC_PUBLIC,
             BOOTSTRAP_METHOD_CLASS_NAME, null, "java/lang/Object", null);
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC,
                                      BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_DESC, null, null);
    mv.visitCode();
    defineIndyBootstrapMethodBody(mv);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:11，代码来源:BootstrapMethodErrorTest.java

示例13: dump_HasFinal

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
public static void dump_HasFinal () throws Exception {

        ClassWriter cw = new ClassWriter(0);
        MethodVisitor mv;

        cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HasFinal", null, "java/lang/Object", null);

        {
            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
            mv.visitCode();
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
            mv.visitInsn(RETURN);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
        }
        {
            mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "m", "(Ljava/lang/String;)V", null, null);
            mv.visitCode();
            mv.visitInsn(RETURN);
            mv.visitMaxs(0, 2);
            mv.visitEnd();
        }
        cw.visitEnd();
        try (FileOutputStream fos = new FileOutputStream(new File("HasFinal.class"))) {
             fos.write(cw.toByteArray());
        }
    }
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:29，代码来源:OverriderMsg.java

示例14: dumpP1B

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
public static byte[] dumpP1B() {

        ClassWriter cw = new ClassWriter(0);
        MethodVisitor mv;

        cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "P1/B", null, "P1/A", null);

        {
            mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
            mv.visitCode();
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn(INVOKESPECIAL, "P1/A", "<init>", "()V", false);
            mv.visitInsn(RETURN);
            mv.visitMaxs(1, 1);
            mv.visitEnd();
        }
        {
            mv = cw.visitMethod(0, "m", "()I", null, null);
            mv.visitCode();
            mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
            mv.visitLdcInsn("B.m");
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
            mv.visitIntInsn(BIPUSH, 2);
            mv.visitInsn(IRETURN);
            mv.visitMaxs(2, 1);
            mv.visitEnd();
        }
        cw.visitEnd();

        return cw.toByteArray();
    }
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:32，代码来源:TransitiveOverrideCFV50.java

示例15: dumpClassFile

import jdk.internal.org.objectweb.asm.ClassWriter; //导入方法依赖的package包/类
public static byte[] dumpClassFile(int cfv, int testDimension264, String arrayDim) throws Exception {
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
    MethodVisitor mv;

    classCName = "classCName_" + cfv + "_" + testDimension264;

    cw.visit(cfv, ACC_PUBLIC + ACC_SUPER, classCName, null, "java/lang/Object", null);
    {
        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(1, 1);
        mv.visitEnd();
    }
    {   // classCName main method
        mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
        mv.visitCode();
        mv.visitIntInsn(BIPUSH, 1);
        mv.visitTypeInsn(ANEWARRAY, arrayDim); // Test ANEWARRAY bytecode with various dimensions
        mv.visitInsn(RETURN);
        mv.visitMaxs(2, 2);
        mv.visitEnd();
    }
    cw.visitEnd();
    return cw.toByteArray();
}
开发者ID:AdoptOpenJDK，项目名称:openjdk-jdk10，代码行数:29，代码来源:TestANewArray.java


注：本文中的jdk.internal.org.objectweb.asm.ClassWriter.visit方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。