Re: Does gcj pass -dy and -dn to linker?

[Bill Bland <wjb at netpd dot com>]

On Tue, 30 Oct 2001, Bryce McKinlay wrote:

> Strange - that sounds like some sort of race condition. What version of 
> glibc do you have?

glibc-2.1.3 (from the rpm distributed with Mandrake 7.2).  Are there known
problems with this?  Am I mad to attempt use this version with gcc 3.0.2?

> I understand. Can you run your program in GDB and send a backtrace?

Let me know if I did this wrong (first time using gdb!)
The program actually aborts *every* time I run it in gdb for some reason.

I ran gdb and said:

    (gdb) file myprog
    (gdb) set args -i foo.raw --find
    (gdb) run

to which gdb replied:

    Starting program: /home/wjb/myprog -i foo.raw --find
    warning: Unable to find dynamic linker breakpoint function.
    GDB will be unable to debug shared library initializers
    and track explicitly loaded dynamic code.

    Program received signal SIG32, Real-time event 32.

    0x4053617e in sigsuspend () from /lib/libc.so.6

I (assuming gdm had stopped at some kind of implicit breakpoint) said:

    (gdb) continue

and gdb said:

    Continuing.

    Program received signal SIGABRT, Aborted.
    0x404fa2b4 in pthread_setconcurrency () from /lib/libpthread.so.0

finally I said:

    (gdb) backtrace

and got the reply:

    #0  0x404fa2b4 in pthread_setconcurrency () from /lib/libpthread.so.0
    #1  0x404fa1a0 in pthread_setconcurrency () from /lib/libpthread.so.0
    #2  0x404fa449 in pthread_create () from /lib/libpthread.so.0
    #3  0x404df6f4 in GC_pthread_create (new_thread=0x81a3264,
        attr=0xbffff6e0, start_routine=0x402ae280 <_Z12really_startPv>, 
        arg=0x818bff8) at ../../../gcc-3.0.2/boehm-gc/linux_threads.c:683
    #4  0x402ae3e7 in 
        _Z15_Jv_ThreadStartPN4java4lang6ThreadEP12_Jv_Thread_tPFvS2_E
        (thread=0x8131f00, data=0x81a3260, 
        meth=0x401c10b0 <_ZN4java4lang6Thread4run_EPNS0_6ObjectE>) at
        ../../../gcc-3.0.2/libjava/posix-threads.cc:394
    #5  0x401c1318 in _ZN4java4lang6Thread5startEv (this=0x8131f00) at
        ../../../gcc-3.0.2/libjava/java/lang/natThread.cc:307
    #6  0x401a0de3 in JvRunMain (klass=0x8101620, argc=5,
        argv=0xbffff834) at ../../../gcc-3.0.2/libjava/prims.cc:852
    #7  0x804bb15 in main ()
    #8  0x4052fcbe in __libc_start_main () from /lib/libc.so.6

Perhaps it's a threads problem?  (naive guess based on the
appearance of the word "thread" lots of times in the backtrace ;-)  If it
helps at all, I compiled gcc 3.0.2 with the options:
  --enable-shared --enable-threads=posix

Please do let me know if I did any of this wrong.  As I said, it's my
first time using gdb.  Thanks again for your help.

Best wishes,
	Bill.