noxiouz
4c7af7d9d1
Add %I (TID in initial PID namespace) to the core_pattern, so the kernel passes the crashing thread's TID to systemd-coredump. Use it to read the thread's comm name from /proc/<tid>/comm and log both as new journal fields: COREDUMP_TID= — TID of the crashing thread COREDUMP_THREAD_NAME= — comm name of the crashing thread These fields are also stored as xattrs on external coredump files (user.coredump.tid, user.coredump.thread_name) and displayed by coredumpctl info alongside the PID line. For single-threaded processes the TID equals the PID and thread_name equals comm; for multi-threaded programs with named worker threads (pthread_setname_np / PR_SET_NAME) this identifies which thread crashed without needing to open the coredump file itself. The new fields are optional in the socket forwarding path, so older systemd-coredump senders are handled gracefully. Co-developed-by: Claude <claude@anthropic.com>
38 lines
1.8 KiB
Plaintext
38 lines
1.8 KiB
Plaintext
# This file is part of systemd.
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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# See sysctl.d(5) for the description of the files in this directory.
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# Pipe the core file to systemd-coredump. The systemd-coredump process spawned
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# by the kernel will start a second copy of itself as the
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# systemd-coredump@.service, which will do the actual processing and storing of
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# the core dump.
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#
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# See systemd-coredump(8) and core(5).
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kernel.core_pattern=|{{LIBEXECDIR}}/systemd-coredump %P %u %g %s %t %c %h %d %F %I
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# Allow 16 coredumps to be dispatched in parallel by the kernel.
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# We collect metadata from /proc/%P/, and thus need to make sure the crashed
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# processes are not reaped until we have finished collecting what we need. The
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# kernel default for this sysctl is "0" which means the kernel doesn't wait for
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# userspace to finish processing before reaping the crashed processes. With a
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# higher setting the kernel will delay reaping until we are done, but only for
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# the specified number of crashes in parallel. The value of 16 is chosen to
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# match systemd-coredump.socket's MaxConnections= value.
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kernel.core_pipe_limit=16
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# Also dump processes executing a set-user-ID/set-group-ID program that is
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# owned by a user/group other than the real user/group ID of the process, or
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# a program that has file capabilities. ("2" is called "suidsafe" in core(5)).
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#
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# systemd-coredump will store the core file owned by the effective uid and gid
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# of the running process (and not the filesystem-user-ID which the kernel uses
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# when saving a core dump).
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#
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# See proc(5), setuid(2), capabilities(7).
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fs.suid_dumpable=2
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