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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2011-01-13 21:46:11 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-01-24 10:57:55 -0200
commite80711ca8512c8586da0c3e18e2f1caf73c88731 (patch)
tree2b6493cd34b5a68ec9008c34a47f8f145711132f /tools/perf/builtin-probe.c
parent5069ed86be3c2f28bcdf7fae1374ec0c325aafba (diff)
downloadop-kernel-dev-e80711ca8512c8586da0c3e18e2f1caf73c88731.zip
op-kernel-dev-e80711ca8512c8586da0c3e18e2f1caf73c88731.tar.gz
perf probe: Add --funcs to show available functions in symtab
Add --funcs to show available functions in symtab. Originally this feature came from Srikar's uprobes patches ( http://lkml.org/lkml/2010/8/27/244 ) e.g. ... __ablkcipher_walk_complete __absent_pages_in_range __account_scheduler_latency __add_pages __alloc_pages_nodemask __alloc_percpu __alloc_reserved_percpu __alloc_skb __alloc_workqueue_key __any_online_cpu __ata_ehi_push_desc ... This also supports symbols in module, e.g. ... cleanup_module cpuid_maxphyaddr emulate_clts emulate_instruction emulate_int_real emulate_invlpg emulator_get_dr emulator_set_dr emulator_task_switch emulator_write_emulated emulator_write_phys fx_init ... Original-patch-from: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Franck Bui-Huu <fbuihuu@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20110113124611.22426.10835.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> [ committer note: Add missing elf.h for STB_GLOBAL that broke a RHEL4 build ] 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.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index add163c..6cf708a 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -52,6 +52,7 @@ static struct {
bool show_lines;
bool show_vars;
bool show_ext_vars;
+ bool show_funcs;
bool mod_events;
int nevents;
struct perf_probe_event events[MAX_PROBES];
@@ -221,6 +222,8 @@ static const struct option options[] = {
OPT__DRY_RUN(&probe_event_dry_run),
OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
"Set how many probe points can be found for a probe."),
+ OPT_BOOLEAN('F', "funcs", &params.show_funcs,
+ "Show potential probe-able functions."),
OPT_END()
};
@@ -246,7 +249,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
params.max_probe_points = MAX_PROBES;
if ((!params.nevents && !params.dellist && !params.list_events &&
- !params.show_lines))
+ !params.show_lines && !params.show_funcs))
usage_with_options(probe_usage, options);
/*
@@ -267,12 +270,36 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
pr_err(" Error: Don't use --list with --vars.\n");
usage_with_options(probe_usage, options);
}
+ if (params.show_funcs) {
+ pr_err(" Error: Don't use --list with --funcs.\n");
+ usage_with_options(probe_usage, options);
+ }
ret = show_perf_probe_events();
if (ret < 0)
pr_err(" Error: Failed to show event list. (%d)\n",
ret);
return ret;
}
+ if (params.show_funcs) {
+ if (params.nevents != 0 || params.dellist) {
+ pr_err(" Error: Don't use --funcs with"
+ " --add/--del.\n");
+ usage_with_options(probe_usage, options);
+ }
+ if (params.show_lines) {
+ pr_err(" Error: Don't use --funcs with --line.\n");
+ usage_with_options(probe_usage, options);
+ }
+ if (params.show_vars) {
+ pr_err(" Error: Don't use --funcs with --vars.\n");
+ usage_with_options(probe_usage, options);
+ }
+ ret = show_available_funcs(params.target_module);
+ if (ret < 0)
+ pr_err(" Error: Failed to show functions."
+ " (%d)\n", ret);
+ return ret;
+ }
#ifdef DWARF_SUPPORT
if (params.show_lines) {
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