process hanging on 7.2-PRERELEASE

[Max Brazhnikov]

On Sat, 2 May 2009 15:45:17 +0300, Kostik Belousov wrote:
> On Sat, May 02, 2009 at 02:43:52PM +0400, Max Brazhnikov wrote:
> > Currently all kde4 ports marked as jobs_unsafe, because of automoc4
> > hangs. The problem can be easely reproduced building e.g.
> > accessibility/kdeaccessibility4 with multiple jobs: replace
> > MAKE_JOBS_UNSAFE with MAKE_JOBS_SAFE in port Makefile and run 'make
> > MAKE_JOBS_NUMBER=16'. Build will be freezed on
> >
> > /usr/local/bin/cmake -E cmake_progress_report
> > /tank/obj/usr/ports/accessibility/kdeaccessibility4/work/kdeaccessibility
> >-4.2.2/build/CMakeFiles  77 78 79 8081 82 83 84 85 86 87 88 89 90 91 92 93
> > 94 95
> > [ 95%] Built target kmouth
> >
> > # ps | grep automoc4
> > 77829  p4  S+     0:00.27 /usr/local/bin/automoc4
> > /tank/obj/usr/ports/accessibility/kdeaccessibility4/ 77840  p4  I+    
> > 0:00.00 /usr/local/bin/automoc4
> > /tank/obj/usr/ports/accessibility/kdeaccessibility4/
> >
> > #gdb66 automoc4 77829
> > 0x2846fb3b in select () at select.S:2
> > 2       RSYSCALL(select)
> > (gdb) bt
> > #0  0x2846fb3b in select () at select.S:2
> > #1  0x2838d788 in __select (numfds=6, readfds=0xbf9feee8, writefds=0x0,
> > exceptfds=0x0, timeout=0x0) at
> > /usr/freebsd/7/src/lib/libthr/thread/thr_syscalls.c:444
> > #2  0x281b4f3d in QProcessManager::run (this=0x287142f0) at
> > io/qprocess_unix.cpp:301 #3  0x280f30e2 in QThreadPrivate::start
> > (arg=0x287142f0) at thread/qthread_unix.cpp:185 #4  0x2838b68a in
> > thread_start (curthread=0x28701150) at
> > /usr/freebsd/7/src/lib/libthr/thread/thr_create.c:288 #5  0x00000000 in
> > ?? ()
> > Current language:  auto; currently asm
> > (gdb)
> >
> >
> > # gdb66 automoc4 77840
> > 0x28395593 in _umtx_op_err () at
> > /usr/freebsd/7/src/lib/libthr/arch/i386/i386/_umtx_op_err.S:36 36     
> > SYSCALL_ERR(_umtx_op)
> > (gdb) bt
> > #0  0x28395593 in _umtx_op_err () at
> > /usr/freebsd/7/src/lib/libthr/arch/i386/i386/_umtx_op_err.S:36 #1 
> > 0x283953c4 in __thr_umutex_lock (mtx=0x8054f3c, id=100416) at
> > /usr/freebsd/7/src/lib/libthr/thread/thr_umtx.c:58 #2  0x28390502 in
> > mutex_lock_sleep (curthread=0x28701040, m=0x8054f3c, abstime=0x0) at
> > /usr/freebsd/7/src/lib/libthr/thread/thr_mutex.c:401 #3  0x283fb0ea in
> > _malloc_postfork () at /usr/freebsd/7/src/lib/libc/stdlib/malloc.c:1029
> > #4  0x28393038 in _fork () at
> > /usr/freebsd/7/src/lib/libthr/thread/thr_fork.c:178 #5  0x281b7381 in
> > QProcessPrivate::startProcess (this=0x287720f0) at
> > io/qprocess_unix.cpp:570 #6  0x2817a181 in QProcess::start
> > (this=0xbfbfe1b8, program=@0xbfbfe5dc, arguments=@0xbfbfe1b4,
> > mode=@0xbfbfe1c0) at io/qprocess.cpp:1508 #7  0x08051720 in
> > AutoMoc::echoColor (this=0xbfbfe5c8, msg=@0xbfbfe258) at
> > /tank/obj/usr/ports/devel/automoc4/work/automoc4-0.9.88/kde4automoc.cpp:7
> >3 #8  0x0804c0a7 in AutoMoc::generateMoc (this=0xbfbfe5c8,
> > sourceFile=@0x28714418, mocFileName=@0x2871441c) at
> > /tank/obj/usr/ports/devel/automoc4/work/automoc4-0.9.88/kde4automoc.cpp:5
> >69 #9  0x0804f4ae in AutoMoc::run (this=0xbfbfe5c8) at
> > /tank/obj/usr/ports/devel/automoc4/work/automoc4-0.9.88/kde4automoc.cpp:4
> >70 #10 0x080504e6 in main (argc=Cannot access memory at address 0x0 ) at
> > /tank/obj/usr/ports/devel/automoc4/work/automoc4-0.9.88/kde4automoc.cpp:1
> >14 Current language:  auto; currently asm
> > (gdb)
>
> Great.
>
> I think this is a missed merge of the r185514 to 7. Can you, please,
> retest with that revision merged ?

Great! With the patch I can't reproduce the problem!