(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...@hitachi.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
