Messages in this thread | | | Date | Mon, 29 Dec 2014 21:21:51 -0700 | From | David Ahern <> | Subject | problems with perf probe and system libraries |
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Hi Masami:
I have been looking at perf-probe again and having a number of problems with top of tree.
Here's the first one I have isolated:
$ perf probe -x /lib64/libc-2.18.so -a 'malloc size=%di' Probe point 'malloc' not found. Error: Failed to add events.
$ perf probe -x /lib64/libc-2.18.so -F | grep malloc malloc malloc@plt malloc_atfork malloc_check malloc_consolidate malloc_hook_ini malloc_info malloc_printerr mallochook ptmalloc_init ptmalloc_init.part.8 ptmalloc_lock_all ptmalloc_unlock_all ptmalloc_unlock_all2 tr_mallochook
$ perf probe -x /lib64/libc-2.18.so -a 'malloc=malloc size=%di' Probe point 'malloc' not found. Error: Failed to add events.
A year ago (v3.12) this worked fine so I did a git bisect which points to:
commit fb7345bbf7fad9bf72ef63a19c707970b9685812 Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Date: Thu Dec 26 05:41:53 2013 +0000
perf probe: Support basic dwarf-based operations on uprobe events
I have tried top of tree on Fedora 16, 18 and 20 with a variety of kernels - and a variety of results. Reverting to 8a613d40e389b723fd5889ac8d4033ed4030be31 which is the commit before this one and it works again.
David
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