Messages in this thread | | | Date | Mon, 02 Dec 2013 14:59:33 +0900 | From | Masami Hiramatsu <> | Subject | Re: [PATCH 1/2] perf probe: Improve error message when function not found |
| |
(2013/12/02 9:07), David Ahern wrote: > When requesting a function from a userspace library the error message to > the user is less than helpful. e.g., > > perf probe -x /lib64/libpthread-2.14.90.so -a 'lock_full=__pthread_mutex_lock_full' > no symbols found in /lib64/libpthread-2.14.90.so, maybe install a debug package? > Failed to load map. > Error: Failed to add events. (-22) > > In this cae the symbol really does exist but is a local symbol which is > filtered: > > nm /lib64/libpthread-2.14.90.so | grep __pthread_mutex_lock_full > 0000000000005700 t __pthread_mutex_lock_full > > With this patch: > perf probe -x /lib64/libpthread-2.14.90.so -a 'lock_full=__pthread_mutex_lock_full' > > no symbols found in /lib64/libpthread-2.14.90.so, maybe install a debug package? > Failed to find function in /lib64/libpthread-2.14.90.so. Perhaps it is a local variable?
Hmm, indeed current message is too less information, but your message looks wired. I think just showing "Failed to find requested symbol in %s" is enough. :)
Thank you,
-- Masami HIRAMATSU IT Management Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com
| |