import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; //导入依赖的package包/类
/**
 * External entry point for ScriptClassInfoCollector if run from the command line
 *
 * @param args arguments - one argument is needed, the name of the class to collect info from
 *
 * @throws IOException if there are problems reading class
 */
public static void main(final String[] args) throws IOException {
    if (args.length != 1) {
        System.err.println("Usage: " + ScriptClassInfoCollector.class.getName() + " <class>");
        System.exit(1);
    }

    final String fileName = args[0].replace('.', '/') + ".class";
    final ScriptClassInfo sci = ClassGenerator.getScriptClassInfo(fileName);
    if (sci == null) {
        System.err.println("No @ScriptClass in " + fileName);
        System.exit(2);
        throw new AssertionError(); //guard against warning that sci is null below
    }

    try {
        sci.verify();
    } catch (final Exception e) {
        System.err.println(e.getMessage());
        System.exit(3);
    }

    final ClassWriter writer = ClassGenerator.makeClassWriter();
    try (final BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName))) {
        final ClassReader reader = new ClassReader(bis);
        final CheckClassAdapter checker = new CheckClassAdapter(writer);
        final ScriptClassInstrumentor instr = new ScriptClassInstrumentor(checker, sci);
        reader.accept(instr, 0);
    }

    try (FileOutputStream fos = new FileOutputStream(fileName)) {
        fos.write(writer.toByteArray());
    }
}
 

import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; //导入依赖的package包/类
/**
 * External entry point for ScriptClassInfoCollector if run from the command line
 *
 * @param args arguments - one argument is needed, the name of the class to collect info from
 *
 * @throws IOException if there are problems reading class
 */
public static void main(final String[] args) throws IOException {
    if (args.length != 1) {
        System.err.println("Usage: " + ScriptClassInstrumentor.class.getName() + " <class>");
        System.exit(1);
    }

    final String fileName = args[0].replace('.', '/') + ".class";
    final ScriptClassInfo sci = ClassGenerator.getScriptClassInfo(fileName);
    if (sci == null) {
        System.err.println("No @ScriptClass in " + fileName);
        System.exit(2);
        throw new AssertionError(); //guard against warning that sci is null below
    }

    try {
        sci.verify();
    } catch (final Exception e) {
        System.err.println(e.getMessage());
        System.exit(3);
    }

    final ClassWriter writer = ClassGenerator.makeClassWriter();
    try (final BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fileName))) {
        final ClassReader reader = new ClassReader(bis);
        final CheckClassAdapter checker = new CheckClassAdapter(writer);
        final ScriptClassInstrumentor instr = new ScriptClassInstrumentor(checker, sci);
        reader.accept(instr, 0);
    }

    try (FileOutputStream fos = new FileOutputStream(fileName)) {
        fos.write(writer.toByteArray());
    }
}
 

import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; //导入依赖的package包/类
private static void verify(final byte[] buf) {
    final ClassReader cr = new ClassReader(buf);
    CheckClassAdapter.verify(cr, false, new PrintWriter(System.err));
}
 

import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; //导入依赖的package包/类
/**
 * Verify generated bytecode before emission. This is called back from the
 * {@link ObjectClassGenerator} or the {@link Compiler}. If the "--verify-code" parameter
 * hasn't been given, this is a nop
 *
 * Note that verification may load classes -- we don't want to do that unless
 * user specified verify option. We check it here even though caller
 * may have already checked that flag
 *
 * @param bytecode bytecode to verify
 */
public void verify(final byte[] bytecode) {
    if (env._verify_code) {
        // No verification when security manager is around as verifier
        // may load further classes - which should be avoided.
        if (System.getSecurityManager() == null) {
            CheckClassAdapter.verify(new ClassReader(bytecode), sharedLoader, false, new PrintWriter(System.err, true));
        }
    }
}
 

import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; //导入依赖的package包/类
/**
 * Verify generated bytecode before emission. This is called back from the
 * {@link ObjectClassGenerator} or the {@link Compiler}. If the "--verify-code" parameter
 * hasn't been given, this is a nop
 *
 * Note that verification may load classes -- we don't want to do that unless
 * user specified verify option. We check it here even though caller
 * may have already checked that flag
 *
 * @param bytecode bytecode to verify
 */
public void verify(final byte[] bytecode) {
    if (env._verify_code) {
        // No verification when security manager is around as verifier
        // may load further classes - which should be avoided.
        if (System.getSecurityManager() == null) {
            CheckClassAdapter.verify(new ClassReader(bytecode), theStructLoader, false, new PrintWriter(System.err, true));
        }
    }
}