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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2010-10-21 14:13:41 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-10-21 22:11:44 +0400
commit469b9b88488e89114bb3e9ac5ee7906b7b96123f (patch)
tree9f002195a8b1167eddbe560ac834e6ba2dedb19f /tools/perf/builtin-probe.c
parentfb8c5a56c7ddbc2b0d2ee7a8da60fe1355f75141 (diff)
downloadlinux-469b9b88488e89114bb3e9ac5ee7906b7b96123f.tar.xz
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/builtin-probe.c')
-rw-r--r--tools/perf/builtin-probe.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index bdf60cfdf70f..2e000c068cc5 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -57,6 +57,7 @@ static struct {
struct perf_probe_event events[MAX_PROBES];
struct strlist *dellist;
struct line_range line_range;
+ const char *target_module;
int max_probe_points;
} params;
@@ -162,8 +163,8 @@ static const char * const probe_usage[] = {
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
"perf probe --list",
#ifdef DWARF_SUPPORT
- "perf probe --line 'LINEDESC'",
- "perf probe [--externs] --vars 'PROBEPOINT'",
+ "perf probe [<options>] --line 'LINEDESC'",
+ "perf probe [<options>] --vars 'PROBEPOINT'",
#endif
NULL
};
@@ -214,6 +215,8 @@ static const struct option options[] = {
"file", "vmlinux pathname"),
OPT_STRING('s', "source", &symbol_conf.source_prefix,
"directory", "path to kernel source"),
+ OPT_STRING('m', "module", &params.target_module,
+ "modname", "target module name"),
#endif
OPT__DRY_RUN(&probe_event_dry_run),
OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
@@ -278,7 +281,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
usage_with_options(probe_usage, options);
}
- ret = show_line_range(&params.line_range);
+ ret = show_line_range(&params.line_range, params.target_module);
if (ret < 0)
pr_err(" Error: Failed to show lines. (%d)\n", ret);
return ret;
@@ -291,6 +294,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
}
ret = show_available_vars(params.events, params.nevents,
params.max_probe_points,
+ params.target_module,
params.show_ext_vars);
if (ret < 0)
pr_err(" Error: Failed to show vars. (%d)\n", ret);
@@ -310,6 +314,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
if (params.nevents) {
ret = add_perf_probe_events(params.events, params.nevents,
params.max_probe_points,
+ params.target_module,
params.force_add);
if (ret < 0) {
pr_err(" Error: Failed to add events. (%d)\n", ret);