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From "Vladimir Ivanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-885) [classlib][core][drlvm] unexpected LinkageError for ClassLoader.defineClass
Date Mon, 17 Jul 2006 04:28:13 GMT
[classlib][core][drlvm] unexpected LinkageError for ClassLoader.defineClass
---------------------------------------------------------------------------

                 Key: HARMONY-885
                 URL: http://issues.apache.org/jira/browse/HARMONY-885
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Vladimir Ivanov


According to J2SE specifications for method java.lang.ClassLoader.defineClass(byte[] b, int
off, int len):
 "Throws: ClassFormatError - if the data did not contain a valid class "

But Harmony API +DRLVM throws LinkageError in this case.

=================== test.java =======================
public class test {
    public static void main (String [] args) {
        try {
            byte[] array0 = new byte[] { 2, 2, 2, 2, 2, 2};
            new CL().defineKlass(array0, 0, 3);
            System.out.println("exception expected");
        } catch (ClassFormatError e) {
            System.out.println("Test passed: " + e);
        } catch (Throwable e) {
            System.out.println("Test failed: unexpected exception: " + e);
            e.printStackTrace();
        }
    }
}
class CL extends ClassLoader {
    public Class defineKlass(byte[] a, int i1, int i2) throws ClassFormatError {
        return super.defineClass(a, i1, i2);
    }
} 
=================================================

Output:
C:\tmp\tmp17>C:\jrockit-jdk1.5.0-windows-ia32\bin\java.exe -cp . -showversion test
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
BEA WebLogic JRockit(R) (build dra-38972-20041208-2001-win-ia32, R25.0.0-75, GC: System optimized
over throughput (initial strategy singleparpar))

Test passed: java.lang.ClassFormatError

C:\tmp\tmp17>C:\harmony\trunk_0427\deploy\jdk\jre\bin\java.exe -cp . -showversion test
java version 1.5 (subset)

(c) Copyright 1991, 2006 The Apache Software Foundation or its licensors, as applicable.
Test passed: java.lang.ClassFormatError: () unexpected EOF at offset=3

C:\tmp\tmp17>C:\harmony\drlvm\trunk\build\win_ia32_msvc_debug\deploy\jre\bin\ij -cp . -showversion
test
Apache Harmony DRLVM HEAD-4807 (2006-05-02), Windows/ia32/msvc 1310, debug
Test failed: unexpected exception: java.lang.LinkageError: DefineClass was called without
class name and class name could not be extracted from provid
ed class data
java.lang.LinkageError: DefineClass was called without class name and class name could not
be extracted from provided class data
        at java.lang.VMClassRegistry.defineClass()
        at java.lang.ClassLoader.defineClass()
        at java.lang.ClassLoader.defineClass()
        at java.lang.ClassLoader.defineClass()
        at CL.defineKlass(test.java:17)
        at test.main(test.java:5)

C:\tmp\tmp17>C:\harmony\drlvm\trunk\build\win_ia32_msvc_release\deploy\jre\bin\ij -cp .
-showversion test
Apache Harmony DRLVM HEAD-4807 (2006-05-02), Windows/ia32/msvc 1310, release
Test failed: unexpected exception: java.lang.LinkageError: DefineClass was called without
class name and class name could not be extracted from provid
ed class data
java.lang.LinkageError: DefineClass was called without class name and class name could not
be extracted from provided class data
        at java.lang.VMClassRegistry.defineClass()
        at java.lang.ClassLoader.defineClass()
        at java.lang.ClassLoader.defineClass()
        at java.lang.ClassLoader.defineClass()
        at CL.defineKlass(test.java:17)
        at test.main(test.java:5)




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