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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2010-10-21 12:13:41 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-10-21 20:11:44 +0200 |
| commit | 469b9b88488e89114bb3e9ac5ee7906b7b96123f (patch) | |
| tree | 9f002195a8b1167eddbe560ac834e6ba2dedb19f /tools/perf/util/probe-finder.h | |
| parent | perf probe: Show accessible global variables (diff) | |
| download | linux-469b9b88488e89114bb3e9ac5ee7906b7b96123f.tar.xz linux-469b9b88488e89114bb3e9ac5ee7906b7b96123f.zip | |
perf probe: Add basic module support
Add basic module probe support on perf probe. This introduces "--module
<MODNAME>" option to perf probe for putting probes and showing lines and
variables in the given module.
Currently, this supports only probing on running modules. Supporting off-line
module probing is the next step.
e.g.)
[show lines]
# ./perf probe --module drm -L drm_vblank_info
<drm_vblank_info:0>
0 int drm_vblank_info(struct seq_file *m, void *data)
1 {
struct drm_info_node *node = (struct drm_info_node *) m->private
3 struct drm_device *dev = node->minor->dev;
...
[show vars]
# ./perf probe --module drm -V drm_vblank_info:3
Available variables at drm_vblank_info:3
@<drm_vblank_info+20>
(unknown_type) data
struct drm_info_node* node
struct seq_file* m
[put a probe]
# ./perf probe --module drm drm_vblank_info:3 node m
Add new event:
probe:drm_vblank_info (on drm_vblank_info:3 with node m)
You can now use it on all perf tools, such as:
perf record -e probe:drm_vblank_info -aR sleep 1
[list probes]
# ./perf probe -l
probe:drm_vblank_info (on drm_vblank_info:3@drivers/gpu/drm/drm_info.c with ...
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20101021101341.3542.71638.stgit@ltc236.sdl.hitachi.co.jp>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-finder.h')
| -rw-r--r-- | tools/perf/util/probe-finder.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h index 516912a04011..bba69d455699 100644 --- a/tools/perf/util/probe-finder.h +++ b/tools/perf/util/probe-finder.h @@ -22,7 +22,7 @@ extern int find_probe_trace_events(int fd, struct perf_probe_event *pev, int max_tevs); /* Find a perf_probe_point from debuginfo */ -extern int find_perf_probe_point(int fd, unsigned long addr, +extern int find_perf_probe_point(unsigned long addr, struct perf_probe_point *ppt); /* Find a line range */ @@ -35,6 +35,7 @@ extern int find_available_vars_at(int fd, struct perf_probe_event *pev, #include <dwarf.h> #include <libdw.h> +#include <libdwfl.h> #include <version.h> struct probe_finder { |