On 21.08.2020 17:10, Patrick Welche wrote:
> pbulk was idle stuck building kio at
>
> dbus24339 0.0 0.0 182156 9644 pts/6 Il 12:45PM 0:00.04
> /usr/pkg/bin/cmake -E cmake_autogen
> /tmp/pkgsrc/devel/kio/work/kio-5.70.1/_KDE_build/src/urifilters/ikws/CMakeFiles/kurisearchfilter_autogen.dir/AutogenInfo.json
>
>
> Trying to debug:
>
> # gcore -c cmake.core 24339
> gcore: ptrace(PT_DUMPCORE) to 24339 failed: Permission denied
> # gcore 24339
> gcore: ptrace(PT_ATTACH) to 24339 failed: No such process
>
> Permission denied? and sure enough after that, there was no process.
>
There is a general bug in ptrace(PT_ATTACH) that checks permissions on
behalf of the dumping process. For example, once a child sets
RLIMIT_CORE to 0, you cannot attach to it and dump the core.
> Thoughts on giving root permission? (I should have just gdb attached...)
>
Other ptrace(2) semantics are not affected with the current NetBSD behavior.
New GDB (upcoming in base / pkgsrc), gained gdb-gcore support that uses
ptrace(PT_DUMPCORE), thus suffers from the same problem.
>
> Cheers,
>
> Patrick
>
signature.asc
Description: OpenPGP digital signature
