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| -rw-r--r-- | open_issues/fork_deadlock.mdwn | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/open_issues/fork_deadlock.mdwn b/open_issues/fork_deadlock.mdwn new file mode 100644 index 00000000..cfb6b743 --- /dev/null +++ b/open_issues/fork_deadlock.mdwn @@ -0,0 +1,65 @@ +[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!tag open_issue_glibc]] + +This started appearing when Jérémie's [[glibc]] signal patches were integrated: +very sporadically, but still now and then, `fork` will hand, as follows, and +typically in `/bin/sh`. + +From a `libtool` invocation: + + #0 0x0107b13c in swtch_pri () at /build/eglibc-Q9jlik/eglibc-2.13/build-tree/hurd-i386-libc/mach/swtch_pri.S:2 + No locals. + #1 0x0107c9c4 in __spin_lock_solid (lock=0x125080c) at spin-solid.c:27 + No locals. + #2 0x01091427 in __spin_lock (__lock=<optimized out>) at ../mach/lock-intern.h:55 + No locals. + #3 _hurd_sigstate_lock (ss=0x1250008) at hurdsig.c:172 + No locals. + #4 0x011261ec in _hurd_critical_section_unlock (our_lock=<optimized out>) at ../hurd/hurd/signal.h:235 + No locals. + #5 __fork () at ../sysdeps/mach/hurd/fork.c:706 + env = {{__jmpbuf = {18784244, 19197896, 1, 16925832, 16925460, 17980399}, __mask_was_saved = 0, __saved_mask = 33}} + pid = 0 + err = <optimized out> + __PRETTY_FUNCTION__ = "__fork" + ss = 0x1250008 + threads = 0x0 + nthreads = 0 + stopped = 1 + i = 6 + [...] + + +Another one in `dash`: + + #0 0x0105927c in swtch_pri () at /media/erich/home/thomas/tmp/glibc/debian/eglibc-2.13/build-tree/hurd-i386-libc/mach/swtch_pri.S:2 + No locals. + #1 0x0105ac44 in __spin_lock_solid (lock=0x123580c) at spin-solid.c:27 + No locals. + #2 0x010701c7 in __spin_lock (__lock=<optimized out>) at ../mach/lock-intern.h:55 + No locals. + #3 _hurd_sigstate_lock (ss=0x1235008) at hurdsig.c:172 + No locals. + #4 0x011048f0 in _hurd_critical_section_unlock (our_lock=0x1235008) at ../hurd/hurd/signal.h:235 + ss = 0x1235008 + pending = <optimized out> + #5 __fork () at ../sysdeps/mach/hurd/fork.c:706 + env = {{__jmpbuf = {18780148, 19087304, 134621988, 0, 16938700, 17842902}, __mask_was_saved = 0, __saved_mask = 4294967295}} + pid = 0 + err = 0 + __PRETTY_FUNCTION__ = "__fork" + ss = 0x1235008 + threads = 0x0 + nthreads = 0 + stopped = 1 + i = 6 + [...] |