Alexander, Yes - you are right.
It's just excellent illustration why I hate pipes. So CMake guys can remove this crap from their code and use socketpair() or like instead. \\wbr On Fri, Jul 11, 2014 at 12:33 PM, Kanevskiy, Alexander < alexander.kanevs...@intel.com> wrote: > On 11/07/14 12:15 , "Vitaly Chernooky" > <vitalii.chernoo...@globallogic.com> wrote: > > > This looks like old “good” bug in qemu that sometimes re-appear in certain > combination of host environment and sources you’re building: > > https://bugs.launchpad.net/qemu/+bug/955379 > > > > > >Hi all! > > > >Today I caught again a hang of local building process. > > > >I used debugger and strace in steps to catch a bug. > > > >so: > > > >$ pstree > >... > > | | └─gbs───sh───depanneur─┬─sh───sudo───build─┬─perl > > │ │ │ > >└─su───rpmbuild───sh───cmake───gmake > >... > >$ ps ax | grep gmake > >... > >1105 ? Z 0:00 [gmake] <defunct> > > > >... > >$ ps ax | grep cmake > >... > > 760 ? S 0:01 /usr/bin/cmake ... > > > >... > >$ sudo strace -p 760 > >[sudo] password for vitalii.chernookyi: > > > > > >Process 760 attached - interrupt to quit > >select(4, [3], NULL, NULL, NULL^C <unfinished ...> > > > > > >Process 760 detached > >$ ls -l /proc/760/fd/3 > > > >lr-x------ 1 vitalii.chernookyi tizendev 64 Jul 11 11:41 /proc/760/fd/3 > >-> pipe:[1670438] > > > >$ ls -l /proc/*/fd/* | grep 'pipe:\[1670438\]' > >lr-x------ 1 vitalii.chernookyi tizendev 64 Jul 11 11:41 /proc/760/fd/3 > >-> pipe:[1670438] > >l-wx------ 1 vitalii.chernookyi tizendev 64 Jul 11 11:42 /proc/760/fd/4 > >-> pipe:[1670438] > > > > > >$ sudo gdb -p 760 > >... > >0x0000000060138543 in ?? () > > > > > >(gdb) bt > >#0 0x0000000060138543 in ?? () > > > > > >#1 0x000000006004a4ce in ?? () > >#2 0x000000006004e2fe in ?? () > > > > > >#3 0x0000000060040309 in ?? () > >#4 0x00000000600039ee in ?? () > > > > > >#5 0x00000000600d9584 in ?? () > >#6 0x0000000060003f41 in ?? () > > > > > >#7 0x00007fff61dc5e88 in ?? () > >#8 0x0000000000000000 in ?? () > > > > > >(gdb) quit > > > > > > > > > >... > >$ > > > > > > > >So we caught a deedlock. > > > >Do anyone have any idea how to fix it? > > > > > >-- > >Vitaly Chernooky | Senior Developer - Product Engineering and Development > >GlobalLogic > >P +380.44.4929695 ext.1136 M +380.98.7920568 S cvv_2k > >www.globallogic.com <http://www.globallogic.com> > > > >http://www.globallogic.com/email_disclaimer.txt > > > > > > > > > > > > > > > -- > Best regards, Alexander Kanevskiy. > > --------------------------------------------------------------------- > Intel Finland Oy > Registered Address: PL 281, 00181 Helsinki > Business Identity Code: 0357606 - 4 > Domiciled in Helsinki > > This e-mail and any attachments may contain confidential material for > the sole use of the intended recipient(s). Any review or distribution > by others is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies. > -- *Vitaly Chernooky | Senior Developer - Product Engineering and Development* GlobalLogic P *+380.44.4929695 ext.1136* M *+380.98.7920568* S cvv_2k www.globallogic.com http://www.globallogic.com/email_disclaimer.txt
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