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perf probe: Add --funcs to show available functions in symtab

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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>
This commit is contained in:
Masami Hiramatsu
2011-01-13 21:46:11 +09:00
committed by Arnaldo Carvalho de Melo
parent 5069ed86be
commit e80711ca85
4 changed files with 99 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/builtin-probe.c
+28 -1
View File
@@ -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) {