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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2011-08-11 20:02:35 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-08-12 09:22:46 -0300 |
| commit | a128405c6b40371c59c34b00cc66ed06285b9551 (patch) | |
| tree | 4ce07ab8dd02161b5acd678498652916ef07b309 /tools | |
| parent | 8afa2a707d3d1320df5d35966729ac5262da737d (diff) | |
| download | linux-3.10-a128405c6b40371c59c34b00cc66ed06285b9551.tar.gz linux-3.10-a128405c6b40371c59c34b00cc66ed06285b9551.tar.bz2 linux-3.10-a128405c6b40371c59c34b00cc66ed06285b9551.zip | |
perf probe: Fix line walker to check CU correctly
Fix line walker to check whether a given DIE is CU or not.
Actually this function accepts CU, subprogram and inlined_subroutine
DIEs.
Without this fix, perf probe always fails to analyze lines on inlined
functions;
$ perf probe -L pre_schedule
Debuginfo analysis failed. (-2)
Error: Failed to show lines. (-2)
This fixes that bug, as below.
$ perf probe -L pre_schedule
<pre_schedule@/home/mhiramat/ksrc/linux-2.6/kernel/sched.c:0>
0 static inline void pre_schedule(struct rq *rq, struct task_struct *prev
{
2 if (prev->sched_class->pre_schedule)
3 prev->sched_class->pre_schedule(rq, prev);
}
/* rq->lock is NOT held, but preemption is disabled */
Changes from v1:
- Update against current tip tree.(Fix dwarf-aux.c)
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20110811110235.19900.20614.stgit@fedora15
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/dwarf-aux.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c index fddf40f30d3..d35b454f98b 100644 --- a/tools/perf/util/dwarf-aux.c +++ b/tools/perf/util/dwarf-aux.c @@ -439,7 +439,7 @@ static int __die_walk_culines_cb(Dwarf_Die *sp_die, void *data) /** * die_walk_lines - Walk on lines inside given DIE - * @rt_die: a root DIE (CU or subprogram) + * @rt_die: a root DIE (CU, subprogram or inlined_subroutine) * @callback: callback routine * @data: user data * @@ -460,12 +460,12 @@ int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data) size_t nlines, i; /* Get the CU die */ - if (dwarf_tag(rt_die) == DW_TAG_subprogram) + if (dwarf_tag(rt_die) != DW_TAG_compile_unit) cu_die = dwarf_diecu(rt_die, &die_mem, NULL, NULL); else cu_die = rt_die; if (!cu_die) { - pr_debug2("Failed to get CU from subprogram\n"); + pr_debug2("Failed to get CU from given DIE.\n"); return -EINVAL; } |