On 21.08.2020 17:10, Patrick Welche wrote: > pbulk was idle stuck building kio at > > dbus 24339 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 >
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