Subject: Re: commit -- more signal handling stuff
From: sam th (sam@uchicago.edu)
Date: Sat Jul 15 2000 - 07:49:28 CDT
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On Sat, 15 Jul 2000, Tim Allen wrote:
> The important question is, does the core that gets dumped there show you
> the call stack at the time of the problem (eg segfault) that triggered the
> signal, or is it just the call stack of your new signal trapping
> code? Hopefully the former, otherwise the core isn't much use.
>
It shows the call stack all the way to the abort call. But you needen't
worry, here's an example (from undoing page numbers):
(gdb) bt
#0 0x401694e1 in __kill () from /lib/libc.so.6
#1 0x40169156 in raise (sig=6) at ../sysdeps/posix/raise.c:27
#2 0x4016a868 in abort () at ../sysdeps/generic/abort.c:88
#3 0x80bed4a in AP_UnixApp::catchSignals (this=0x83dca58, sig_num=11)
at ap_UnixApp.cpp:1166
#4 0x80bec89 in signalWrapper (sig_num=11) at ap_UnixApp.cpp:1145
#5 <signal handler called>
#6 0x810a7f2 in UT_Vector::getNthItem (this=0x843bd90, n=0)
at ut_vector.cpp:163
#7 0x815e59a in pf_Frag_Strux::getFmtHandle (this=0x843bd70, lid=0)
at pf_Frag_Strux.cpp:49
#8 0x815d4c9 in PD_Document::notifyListeners (this=0x84338c8,
pfs=0x843bd70,
pcr=0x84459c8) at pd_Document.cpp:456
#9 0x816996d in pt_PieceTable::_doTheDo (this=0x8434180, pcr=0x84459c8,
bUndo=1 '\001') at pt_PT_Undo.cpp:209
#10 0x816a534 in pt_PieceTable::undoCmd (this=0x8434180) at
pt_PT_Undo.cpp:447
#11 0x815d92c in PD_Document::undoCmd (this=0x84338c8, repeatCount=0)
at pd_Document.cpp:592
#12 0x81398c4 in FV_View::cmdUndo (this=0x843c8a8, count=1) at
fv_View.cpp:4777
#13 0x80e6485 in ap_EditMethods::undo (pAV_View=0x843c8a8)
at ap_EditMethods.cpp:1333
#14 0x81a5b9c in EV_Keyboard::invokeKeyboardMethod (this=0x83cb810,
pView=0x843c8a8, pEM=0x837bf60, pData=0xbffff4fa, dataLength=1)
at ev_Keyboard.cpp:74
#15 0x81a1fca in ev_UnixKeyboard::keyPressEvent (this=0x83cb810,
pView=0x843c8a8, e=0x84449d8) at ev_UnixKeyboard.cpp:145
#16 0x819412f in XAP_UnixFrame::_fe::key_press_event (w=0x83cbc20,
e=0x84449d8)
at xap_UnixFrame.cpp:254
#5 is the signal handler call, and everything before that is real abi
calls.
sam th
sam@uchicago.edu
http://www.abisource.com/~sam/
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