perf probe: Add filters support for available functions
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>
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index abb423e..fcde003 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -45,6 +45,7 @@
#include "util/probe-event.h"
#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
+#define DEFAULT_FUNC_FILTER "!_*"
#define MAX_PATH_LEN 256
/* Session management structure */
@@ -159,6 +160,7 @@
return ret;
}
+#endif
static int opt_set_filter(const struct option *opt __used,
const char *str, int unset __used)
@@ -180,7 +182,6 @@
return 0;
}
-#endif
static const char * const probe_usage[] = {
"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
@@ -236,10 +237,6 @@
"Show accessible variables on PROBEDEF", opt_show_vars),
OPT_BOOLEAN('\0', "externs", ¶ms.show_ext_vars,
"Show external variables too (with --vars only)"),
- OPT_CALLBACK('\0', "filter", NULL,
- "[!]FILTER", "Set a variable filter (with --vars only)\n"
- "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\")",
- opt_set_filter),
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
OPT_STRING('s', "source", &symbol_conf.source_prefix,
@@ -252,6 +249,11 @@
"Set how many probe points can be found for a probe."),
OPT_BOOLEAN('F', "funcs", ¶ms.show_funcs,
"Show potential probe-able functions."),
+ OPT_CALLBACK('\0', "filter", NULL,
+ "[!]FILTER", "Set a filter (with --vars/funcs only)\n"
+ "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
+ "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
+ opt_set_filter),
OPT_END()
};
@@ -322,7 +324,12 @@
pr_err(" Error: Don't use --funcs with --vars.\n");
usage_with_options(probe_usage, options);
}
- ret = show_available_funcs(params.target_module);
+ if (!params.filter)
+ params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
+ NULL);
+ ret = show_available_funcs(params.target_module,
+ params.filter);
+ strfilter__delete(params.filter);
if (ret < 0)
pr_err(" Error: Failed to show functions."
" (%d)\n", ret);