gpgme hangs in a multithreaded app
albrecht.dress at arcor.de
Thu Mar 27 19:56:01 CET 2003
Well, beleive it or, but changing the linking order removes the hang (I
prefer *not* to say that it's resolved...), and the rest of gpg enabled
balsa (including the more complicated stuff like signing, encrypting, ...)
works peferctly, too. The "successful" command was
gcc -o balsa [objects + local libs] -lpthread -lc -L/usr/local/lib -lgpgme
[rest of the libs...]
So I think you are right that this is a problem in either libc/libpthread
or in the gnome libs. Obviously extremely difficult to tack it down. If I
find some time (not soon, though...), I'll try to write a minimum program
to reproduce it. Hmmmm...
Anyway, thanks for your help!
P.S.: Viele Grüße nach Bochum; ich hab' da E-Technik studiert...
Am 27.03.03 14:14 schrieb(en) Marcus Brinkmann:
> gpgme in multithreaded applications is new area. I am happy you tried
> out. There are many pitfalls in GPGME which made it a bit difficult to
> it thread safe, but the ground work is done. Luckily, the problem you
> actually experiencing does not seem to be related to some of the more
> complex aspects in GPGME.
> _gpgme_get_program_version is a simple function, basically calling fork
> exec () to run gpg --version through a pipe and reading from the pipe to
> determine the version number. That the read() hangs can mean one of two
> 1. There is no data written to the pipe. That would mean gpg doesn't
> actually run, and you should follow the child to see what's going wrong.
> A simple check would be to see if gpg --version does run (and if, if it
> hanging or not). This might be difficult because of the timing. But you
> could replace /usr/bin/gpg with a wrapper to get more info.
> 2. The read is actually hanging. This would mean that there is some
> in glibc that causes this.
> You could also try writing a small test case that I can add to the
> It would make it easy for me to take a closer look at this.
Albrecht Dreß - Johanna-Kirchner-Straße 13 - D-53123 Bonn (Germany)
Phone (+49) 228 6199571 - mailto:albrecht.dress at arcor.de
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