Strange hang when calling signal()

[Gleb Popov]

On Thu, Oct 4, 2018 at 12:26 PM Konstantin Belousov <kostikbel at gmail.com>
wrote:

> On Thu, Oct 04, 2018 at 11:39:21AM +0300, Gleb Popov wrote:
> > On Thu, Oct 4, 2018 at 11:21 AM Konstantin Belousov <kostikbel at gmail.com
> >
> > wrote:
> >
> > > On Thu, Oct 04, 2018 at 10:56:41AM +0300, Gleb Popov wrote:
> > > > On Thu, Oct 4, 2018 at 12:34 AM Konstantin Belousov <
> kostikbel at gmail.com
> > > >
> > > > wrote:
> > > >
> > > > > On Wed, Oct 03, 2018 at 03:18:12PM +0300, Gleb Popov wrote:
> > > > > > I failed to extract a reproducing testcase from that test. The
> > > extracted
> > > > > > code works fine, so either I missed something, or some hidden
> > > conditions
> > > > > > must be fulfilled for the bug to appear.
> > > > > >
> > > > > > Maybe I can try to dive into libc myself? Can you give me some
> > > guidance?
> > > > > Or
> > > > > > maybe you just build kdevelop yourself? It is a matter of
> handful of
> > > > > > commands.
> > > > >
> > > > > Can you provide me the minimal self-contained set of binaries and
> > > shared
> > > > > libraries and the instruction to reproduce the issue ?
> > > > >
> > > >
> > > > Pull in all needed depndencies
> > > > # pkg install kdevelop gmake cmake git
> > > >
> > > > Get KDevelop sources
> > > > # git clone git://anongit.kde.org/kdevelop.git
> > > >
> > > > # Build the test executable
> > > > # mkdir kdevelop/build
> > > > # cd kdevelop/build
> > > > # cmake ..
> > > > # gmake -j4 test_qthelpplugin
> > > >
> > > > Run the test executable and see that it hangs
> > > > # ./plugins/qthelp/tests/test_qthelpplugin testDefaultValue
> > > This is exactly the opposite of 'minimal'.  Provide me the tarball
> which
> > > have just the binary and non-base shared libs needed to reproduce.
> > >
> > > I am not going to install kde on my crash boxes.
> > >
> >
> > Ok, can do that, but
> >
> > # ldd ./plugins/qthelp/tests/test_qthelpplugin | wc -l
> >
> > gives 286. Would that suit you?
> As far as all the mess is extracted into a single directory and can be
> removed with rm -rf, I am fine.
>

I understand that you are reluctant to install KDE, but this "mess" can
also be removed with just

# pkg delete kdevelop
# pkg autoremove
# rm -rf ~/kdevelop

Anyway, I've copied all libraries from ldd output except base ones into a
separate dir, copied the test executable, set LD_LIBRARY_PATH to "."
aaaaaand the hang doesn't happen. Maybe I did something wrong?