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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

19
tools/perf/builtin-probe.c
View File

@ -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 @@ static int opt_show_vars(const struct option *opt __used,
return ret;
}
#endif
static int opt_set_filter(const struct option *opt __used,
const char *str, int unset __used)
@ -180,7 +182,6 @@ static int opt_set_filter(const struct option *opt __used,
return 0;
}
#endif
static const char * const probe_usage[] = {
"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
@ -236,10 +237,6 @@ static const struct option options[] = {
"Show accessible variables on PROBEDEF", opt_show_vars),
OPT_BOOLEAN('\0', "externs", &params.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 @@ static const struct option options[] = {
"Set how many probe points can be found for a probe."),
OPT_BOOLEAN('F', "funcs", &params.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 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
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);