>Number: 173723 >Category: kern >Synopsis: Add file descriptor information to process core dumps >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Mon Nov 19 17:00:00 UTC 2012 >Closed-Date: >Last-Modified: >Originator: John Baldwin >Release: >Organization: >Environment: >Description: ELF core files already include metadata about processes including notes with the context of each running thread. Occasionally I have wanted to examine the open fd's associated with a process while debugging. With the advent of 'procstat -f' we now have a useful structure that holds file descriptor info in a somewhat abstract manner. It seems possible that we could add a new set of notes to a core dump listing the various file descriptors associated with the process at the time of exit storing 'kinfo_file' objects in the relevant notes. It is probably worth including additional notes for other "files" such as the working directory, etc. as show in 'procstat -f' output of a running process.
Once this is present there should be ways to extract the information from a core. One would be to teach libprocstat how to look for data from a core file (and thus procstat). Another useful thing to do would be to add a new custom command to gdb to dump this table from within gdb. Said command could use libprocstat to work against both coredumps and running processes. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
