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Message-ID: | <004101c24194$734d82a0$6132bc3e@BABEL> |
From: | "Conrad Scott" <Conrad DOT Scott AT dsl DOT pipex DOT com> |
To: | <cygwin-developers AT cygwin DOT com> |
References: | <016a01c24148$e61594e0$6132bc3e AT BABEL> <20020811192301 DOT GA9017 AT redhat DOT com> |
Subject: | Re: SIGCLD (?) problem |
Date: | Mon, 12 Aug 2002 01:08:55 +0100 |
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"Christopher Faylor" <cgf AT redhat DOT com> wrote: > I don't see how there could be a race. thread 2 should be the > signal thread. It would be interesting to see what it is doing. > It sounds like it has not been started or something, which would > make the "wait_for_me" function block forever. (gdb) thread 2 [Switching to thread 2 (thread 1852.0x97c)]#0 0x77e8b650 in _system_dlls__ () (gdb) where #0 0x77e8b650 in _system_dlls__ () Cannot access memory at address 0x3 I get exactly the same result for threads 4 thru 9 as well; so this does seem to be the hung-at-creation state (?) for a thread. Thread 10 gives me: (gdb) thread 10 [Switching to thread 10 (thread 1852.0x900)]#0 0x77f91771 in _system_dlls__ () (gdb) where #0 0x77f91771 in _system_dlls__ () #1 0x77e8b2d8 in _system_dlls__ () So, thread 1 is blocked in wait4; thread 3 in wait_subproc; thread 10 in wherever that is; while threads 2 and 4-9 are all at 0x77e8b650. BTW I don't know how (i.e. I haven't bothered to find out how) to convert these system DLL addresses into function names, so I hope this is of some use. > I've made some changes and added some assertions throughout the code. > I don't think they will solve the problem but it may make things a > little clearer if there is a problem. Once I've updated everything, I'll try the re-build once or twice more and see if I can catch it again. > Could you check on the value of wait_sig_inited? Is it non-zero? > The problem is that the process processing thread should not have > to be waiting for this. (gdb) print wait_sig_inited $4 = 0x14c Give a shout if you want any more information: I'll keep the process here for a while longer. Cheers, // Conrad
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