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perf probe: Add filters support for available functions

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Add filters support for available function list.

Default filter is "!_*" for filtering out local-purpose symbols.

e.g.:
 # perf probe --filter="add*" -F
add_disk
add_disk_randomness
add_input_randomness
add_interrupt_randomness
add_memory
add_page_to_unevictable_list
add_page_wait_queue
...

Cc: 2nddept-manager@sdl.hitachi.co.jp
Cc: Chase Douglas <chase.douglas@canonical.com>
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: <20110120141545.25915.85930.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>
This commit is contained in:
Masami Hiramatsu 2011-01-20 23:15:45 +09:00 • committed by Arnaldo Carvalho de Melo
parent bd09d7b5ef
commit 3c42258c9a
4 changed files with 32 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

23
tools/perf/util/probe-event.c
View file

@ -1951,21 +1951,23 @@ int del_perf_probe_events(struct strlist *dellist)
return ret;
}
/* TODO: don't use a global variable for filter ... */
static struct strfilter *available_func_filter;
/*
* If a symbol corresponds to a function with global binding return 0.
* For all others return 1.
* If a symbol corresponds to a function with global binding and
* matches filter return 0. For all others return 1.
*/
static int filter_non_global_functions(struct map *map __unused,
struct symbol *sym)
static int filter_available_functions(struct map *map __unused,
struct symbol *sym)
{
if (sym->binding != STB_GLOBAL)
return 1;
return 0;
if (sym->binding == STB_GLOBAL &&
strfilter__compare(available_func_filter, sym->name))
return 0;
return 1;
}
int show_available_funcs(const char *module)
int show_available_funcs(const char *module, struct strfilter *_filter)
{
struct map *map;
int ret;
@ -1981,7 +1983,8 @@ int show_available_funcs(const char *module)
pr_err("Failed to find %s map.\n", (module) ? : "kernel");
return -EINVAL;
}
if (map__load(map, filter_non_global_functions)) {
available_func_filter = _filter;
if (map__load(map, filter_available_functions)) {
pr_err("Failed to load map.\n");
return -EINVAL;
}