Mark, The new patch is uploaded, which still makes DRLVM crash and I don't understand the reason. According to the backtrace, following static initialization in new ReferenceQueue caused problem: private static final AtomicReferenceFieldUpdater nextUpdater = AtomicReferenceFieldUpdater .newUpdater(Node.class, Node.class, "next"); I'm not sure why this happens. Is there a rule that we should NOT use concurrent package inside java.lang package? The reduced stack backtrace is attached here: Stack trace: 0: 0x00ebaa24 check_pop_frame (exceptions.cpp:337) 1: 0x00ebac20 exn_rethrow_if_pending() (exceptions.cpp:402) 2: 0x00f5b9a4 vm_instantiate_cp_string_slow(Class*, unsigned int) (vm_strings.cpp:602) 3: 0x00ed0ea7 rth_ldc_ref_helper (jit_runtime_support.cpp:151) 4: 0x002c3551 stub::unknown 5: 0x00a40f31 java/lang/ref/ReferenceQueue$Node:: (()V): ReferenceQueue.java:35 6: 0x002c3257 (:-1) 7: 0x00ec444c JIT_execute_method_default (ini_iA32.cpp:296) 8: 0x0030b868 DrlEMImpl::executeMethod(_jmethodID*, jvalue*, jvalue*) (DrlEMImpl.cpp:523) 9: 0x00316db4 ExecuteMethod (em_intf.cpp:40) 10: 0x00ebf7a6 vm_execute_java_method_array (ini.cpp:61) 11: 0x00e9b3aa hythread_suspend_enable (hythread_ext.h:605) 12: 0x00ed1c0d initializeClass (jit_runtime_support.cpp:1234) 13: 0x002c3f21 stub::unknown Thanks a lot! On Wed, Feb 10, 2010 at 10:32 PM, Mark Hindess wrote: > > In message <201002101235.o1ACZ9MJ007644@d12av02.megacenter.de.ibm.com>, > Mark Hindess writes: >> >> In message <70c070d81002100402m5e80cab1r6e63639a8944b52e@mail.gmail.com>, >> James Gan writes: >> > >> > Mark, >> > >> > Thanks a lot! >> > >> > It seems that I used the wrong tool to generate the patch. Sorry for >> > the confusing that I made. >> > >> > I'll create a new patch and return here after two weeks. >> >> Excellent.  I've managed to make use of the current patch because the >> changes are widespread enough that you can cut the new code directly out >> of the patch if you strip the first two characters of each line. >> >> You should still make the clean patch since understanding the expected >> workflow will help speed up the evaluation of future contributions and >> I'd like to check that I'm making the changes as you intended. > > Using your new versions of these two classes causes DRLVM to crash so I > will have to wait until you have a new patch. > > -Mark. > > > > > -- Best Regards James Gan Current Project: Concurrent Building Block at http://amino-cbbs.sourceforge.net/ Blog: http://ganzhi.blogspot.com