On Tue, Sep 06, 2016 at 04:12:12PM -0400, Jack Howarth wrote: > On Tue, Sep 06, 2016 at 08:12:05PM +0100, Ralph Corderoy wrote: > > Hi Jack, > > > > > > gnutar: Child died with signal 11 > > ... > > > stop reason = signal SIGPIPE > > > > SIGPIPE is 13. We want 11, SIGSEGV. Perhaps a "c" or two for continue > > will have the debugger carry on until the SEGV bites. > > $ ulimit -c unlimited > $ gnutar -zcvf test_data.tar.gz test_data > test_data/ > test_data/.noe.tbl.swp > test_data/dihedral.tbl > test_data/file.nam > test_data/io.mc > test_data/noe.tbl > gnutar: test_data.tar.gz: Cannot write: Broken pipe > gnutar: Child died with signal 11 > gnutar: Error is not recoverable: exiting now > $ lldb -c /cores/core.21601 `which gnutar` > (lldb) target create "/opt/local/bin/gnutar" --core "/cores/core.21601" > warning: (x86_64) /cores/core.21601 load command 84 LC_SEGMENT_64 has a > fileoff + filesize (0x296fe000) that extends beyond the end of the file > (0x296fd000), the segment will be truncated to match > Core file '/cores/core.21601' (x86_64) was loaded. > (lldb) bt > * thread #1: tid = 0x0000, 0x00007fff94ebb6d7 > libdispatch.dylib`_dispatch_queue_push_queue + 463, stop reason = signal > SIGSTOP > * frame #0: 0x00007fff94ebb6d7 libdispatch.dylib`_dispatch_queue_push_queue > + 463 > frame #1: 0x00007fff7478c4d0 libdispatch.dylib`_OS_dispatch_mach_vtable + > 48 > frame #2: 0x00007fff94eb9b06 > libdispatch.dylib`_dispatch_queue_wakeup_with_qos_slow + 126 > frame #3: 0x00007fff94ec013f libdispatch.dylib`_dispatch_mach_msg_send + > 1952 > frame #4: 0x00007fff94ebf8dc libdispatch.dylib`dispatch_mach_send + 262 > frame #5: 0x00007fff89448fc9 > libxpc.dylib`xpc_connection_send_message_with_reply + 131 > frame #6: 0x00007fff8e31ebdf CoreFoundation`__66-[CFPrefsSearchListSource > generationCountFromListOfSources:count:]_block_invoke_2 + 143 > frame #7: 0x00007fff8e31ea0d CoreFoundation`_CFPrefsWithDaemonConnection > + 381 > frame #8: 0x00007fff8e31db96 CoreFoundation`__66-[CFPrefsSearchListSource > generationCountFromListOfSources:count:]_block_invoke + 150 > frame #9: 0x00007fff8e31d933 CoreFoundation`-[CFPrefsSearchListSource > generationCountFromListOfSources:count:] + 179 > frame #10: 0x00007fff8e31d214 CoreFoundation`-[CFPrefsSearchListSource > alreadylocked_copyDictionary] + 324 > frame #11: 0x00007fff8e31ce5c CoreFoundation`-[CFPrefsSearchListSource > alreadylocked_copyValueForKey:] + 60 > frame #12: 0x00007fff8e31cdec > CoreFoundation`___CFPreferencesCopyAppValueWithContainer_block_invoke + 60 > frame #13: 0x00007fff8e314b10 CoreFoundation`+[CFPrefsSearchListSource > withSearchListForIdentifier:container:perform:] + 608 > frame #14: 0x00007fff8e314867 > CoreFoundation`_CFPreferencesCopyAppValueWithContainer + 183 > frame #15: 0x00000001021a6538 > libintl.8.dylib`_nl_language_preferences_default + 70 > frame #16: 0x00000001021a462f libintl.8.dylib`libintl_dcigettext + 667 > frame #17: 0x00000001021491f2 gnutar`sys_child_open_for_compress + 125 > frame #18: 0x000000010213011f gnutar`open_archive + 603 > frame #19: 0x00000001021355ab gnutar`create_archive + 67 > frame #20: 0x000000010214b494 gnutar`main + 3510 > frame #21: 0x00007fff895605ad libdyld.dylib`start + 1 > frame #22: 0x00007fff895605ad libdyld.dylib`start + 1 > (lldb) >
I also confirmed that this issue doesn't exist in tar 1.28. The fact that the backtrace for the crash seems to go through CoreFoundation reinforces my suspicion the problem is a thread not being locked properly. We had a problem with random failures in make 4.0/4.1 when executed within the fink packaging manager that could be suppressed by building make with '--disable-nls' to avoid the threading in the CoreFoundation framework. Upstream fixed this in make 4.2.1 with.... http://git.savannah.gnu.org/cgit/make.git/commit/?id=85c788572d054bc2c41b84007875edbd37ad3ed5 http://savannah.gnu.org/bugs/?46261#comment12 by using pselect() to lock the thread. Perhaps something similar needs to be done for the xpipe calls in tar 1.29? > > > > > -- > > Cheers, Ralph. > > https://plus.google.com/+RalphCorderoy
