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Re: "emacs -nw" hangs in a terminal

On 5/23/2012 10:15 AM, Corinna Vinschen wrote:
On May 23 08:00, Ken Brown wrote:
I don't know what this has to do with the longjmp, but the thread
which gets crated right after pressing Ctrl-G is due to a select or
poll call.  The descriptor is a pipe, fifo, or pty.

After the longjmp, emacs has finished processing the C-g and goes back into its idle loop, in which it repeatedly calls select.

gdb doesn't normally show the threads created by select. If it did, it would always create voluminous output. Can you infer anything from the fact that it shows this one?

The problem with stackdumps is that the addresses only make sense
for a single version of the Cygwin DLL.  If that's a self-built
version, what does `addr2line -e /bin/cygwin1.dll 610CFA77' print?
If it's 1.7.15, please install the cygwin-debug package and call
the same addr2line.

I assume the address corresponds to, line 625, but I'm
quite busy with the pthread_cancel stuff, so I didn't look deeper
into this problem.

Yes, that's correct. (I'm using the 20120516 snapshot.)

eax=80106D50 ebx=34322D73 ecx=766231E7 edx=00000000 esi=00000001
ebp=048FACC8 esp=048FACA0
program=C:\cygwin\home\kbrown\src\emacs\test-nox\src\emacs.exe, pid
6492, thread pipesel
Yes, that's exactly the created thread.  Do you happen to know what
kind of descriptor has been given to select at this point?  Is that
a pty master side perhaps?

Based on the emacs code, I think that's right. But maybe I need to download the source for the snapshot I'm using (or build cygwin1.dll myself) so that I can step through the first call to select after the longjmp and see exactly where the crash is happening.


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