[Bug libgcj/27294] New: gij throws NullPointerException, when the interpreter is not enabled

[Bug libgcj/27294] New: gij throws NullPointerException, when the interpreter is not enabled

[debian-gcc at lists dot debian dot org]

gij-4.1 \
            -classpath build/bootstrap/ecj.jar:/usr/share/ant/lib/ant.jar \
            org.eclipse.jdt.internal.compiler.batch.Main \
            -bootclasspath /usr/share/java/libgcj-4.1.jar \
            build/bin

Exception in thread "main" java.lang.NullPointerException
   at java.lang.ClassLoader.defineClass (ClassLoader.java:451)
   at java.security.SecureClassLoader.defineClass (SecureClassLoader.java:108)
   at java.net.URLClassLoader.findClass (URLClassLoader.java:1166)
   at java.lang.ClassLoader.loadClass (ClassLoader.java:317)
   at java.lang.ClassLoader.loadClass (ClassLoader.java:260)
   at java.lang.Class.forName (natClass.cc:88)
   at gnu.java.lang.MainThread.run (MainThread.java:95)
make: *** [build/stamp] Error 1

>>>>> "Martin" == Martin Michlmayr <tbm@cyrius.com> writes:

Hmm.  We probably ought to throw a different exception here.  Would
you mind filing a bug for this?

Martin> Exception in thread "main" java.lang.NullPointerException
Martin>    at java.lang.ClassLoader.defineClass (ClassLoader.java:451)

What this most likely means is that there is an attempt to define a
class from bytecode, and the attempt failed.

Looking at libjava/configure.host, I see that the interpreter is not
enabled for the MIPS port.  So, an exception here is to be expected.

[testing the latter, just the bug report for the NullPointerException]


-- 
           Summary: gij throws NullPointerException, when the interpreter is
                    not enabled
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27294

[Bug libgcj/27294] gij throws NullPointerException, when the interpreter is not enabled

[tromey at gcc dot gnu dot org]

------- Comment #1 from tromey at gcc dot gnu dot org  2006-05-04 18:10 -------
It isn't clear what exception we ought to throw here.

What is happening is that we've found a .class file for a class
we're searching for, but libgcj is not configured to properly
handle class files.

VirtualMachineError would be ok from a spec. point of view.
But it is a bit unfriendly.  This is what I'm leaning toward.

ClassFormatError would also be legal but it is a bit of a lie.


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-05-04 18:10:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27294

[Bug libgcj/27294] gij throws NullPointerException, when the interpreter is not enabled

[tromey at gcc dot gnu dot org]

------- Comment #2 from tromey at gcc dot gnu dot org  2006-05-05 15:05 -------
Subject: Bug 27294

Author: tromey
Date: Fri May  5 15:05:20 2006
New Revision: 113554

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113554
Log:
        PR libgcj/27294:
        * java/lang/natVMClassLoader.cc (defineClass): Throw
        VirtualMachineError if no interpreter configured.

Modified:
    trunk/libjava/ChangeLog
    trunk/libjava/java/lang/natVMClassLoader.cc


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27294

[Bug libgcj/27294] gij throws NullPointerException, when the interpreter is not enabled

[tromey at gcc dot gnu dot org]

------- Comment #3 from tromey at gcc dot gnu dot org  2006-05-05 15:06 -------
Now we print something nicer:

opsy. gij t
Exception in thread "main" java.lang.VirtualMachineError: found class file for
class t, but no interpreter configured in this libgcj


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27294