When 'perf record -g' a existing process, even with debuginfo
packages, still cannnot get symbol from 'perf report'.
try:
perf record -g -p `pidof xxx` -f
perf report
68.26% :1181 b74870f2 [.] 0x000000b74870f2
|
|--32.09%-- 0xb73b5b44
| 0xb7487102
| 0xb748a4e2
| 0xb748633d
| 0xb73b41cd
| 0xb73b4467
| 0xb747d531
The reason is: for existing process, in __cmd_record(),
the pid is 0 rather than the existing process id.
Signed-off-by: Austin Zhang <austin_zhang@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4710.10.255.24.35.1265389362.squirrel@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
f7e7ee3675