summaryrefslogtreecommitdiff
path: root/tools/perf/util/probe-event.c
diff options
context:
space:
mode:
authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2011-01-20 17:15:39 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-01-28 14:20:01 +0300
commitbd09d7b5efeb13965b6725b4a3e9944908bca9d2 (patch)
treed2cd48d6c60288a0cf7d4d7bfe8fdcfed31221d7 /tools/perf/util/probe-event.c
parent68baa431ec2f14ba7510d4e79bceb6ceaf0d3b74 (diff)
downloadlinux-bd09d7b5efeb13965b6725b4a3e9944908bca9d2.tar.xz
perf probe: Add variable filter support
Add filters support for available variable list. Default filter is "!__k???tab_*&!__crc_*" for filtering out automatically generated symbols. The format of filter rule is "[!]GLOBPATTERN", so you can use wild cards. If the filter rule starts with '!', matched variables are filter out. e.g.: # perf probe -V schedule --externs --filter=cpu* Available variables at schedule @<schedule+0> cpumask_var_t cpu_callout_mask cpumask_var_t cpu_core_map cpumask_var_t cpu_isolated_map cpumask_var_t cpu_sibling_map int cpu_number long unsigned int* cpu_bit_bitmap ... 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: <20110120141539.25915.43401.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> [ committer note: Removed the elf.h include as it was fixed up in e80711c] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/probe-event.c')
-rw-r--r--tools/perf/util/probe-event.c66
1 files changed, 40 insertions, 26 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 859d377a3df3..077e0518f0f7 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -451,12 +451,14 @@ end:
}
static int show_available_vars_at(int fd, struct perf_probe_event *pev,
- int max_vls, bool externs)
+ int max_vls, struct strfilter *_filter,
+ bool externs)
{
char *buf;
- int ret, i;
+ int ret, i, nvars;
struct str_node *node;
struct variable_list *vls = NULL, *vl;
+ const char *var;
buf = synthesize_perf_probe_point(&pev->point);
if (!buf)
@@ -464,36 +466,45 @@ static int show_available_vars_at(int fd, struct perf_probe_event *pev,
pr_debug("Searching variables at %s\n", buf);
ret = find_available_vars_at(fd, pev, &vls, max_vls, externs);
- if (ret > 0) {
- /* Some variables were found */
- fprintf(stdout, "Available variables at %s\n", buf);
- for (i = 0; i < ret; i++) {
- vl = &vls[i];
- /*
- * A probe point might be converted to
- * several trace points.
- */
- fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
- vl->point.offset);
- free(vl->point.symbol);
- if (vl->vars) {
- strlist__for_each(node, vl->vars)
+ if (ret <= 0) {
+ pr_err("Failed to find variables at %s (%d)\n", buf, ret);
+ goto end;
+ }
+ /* Some variables are found */
+ fprintf(stdout, "Available variables at %s\n", buf);
+ for (i = 0; i < ret; i++) {
+ vl = &vls[i];
+ /*
+ * A probe point might be converted to
+ * several trace points.
+ */
+ fprintf(stdout, "\t@<%s+%lu>\n", vl->point.symbol,
+ vl->point.offset);
+ free(vl->point.symbol);
+ nvars = 0;
+ if (vl->vars) {
+ strlist__for_each(node, vl->vars) {
+ var = strchr(node->s, '\t') + 1;
+ if (strfilter__compare(_filter, var)) {
fprintf(stdout, "\t\t%s\n", node->s);
- strlist__delete(vl->vars);
- } else
- fprintf(stdout, "(No variables)\n");
+ nvars++;
+ }
+ }
+ strlist__delete(vl->vars);
}
- free(vls);
- } else
- pr_err("Failed to find variables at %s (%d)\n", buf, ret);
-
+ if (nvars == 0)
+ fprintf(stdout, "\t\t(No matched variables)\n");
+ }
+ free(vls);
+end:
free(buf);
return ret;
}
/* Show available variables on given probe point */
int show_available_vars(struct perf_probe_event *pevs, int npevs,
- int max_vls, const char *module, bool externs)
+ int max_vls, const char *module,
+ struct strfilter *_filter, bool externs)
{
int i, fd, ret = 0;
@@ -510,7 +521,8 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
setup_pager();
for (i = 0; i < npevs && ret >= 0; i++)
- ret = show_available_vars_at(fd, &pevs[i], max_vls, externs);
+ ret = show_available_vars_at(fd, &pevs[i], max_vls, _filter,
+ externs);
close(fd);
return ret;
@@ -556,7 +568,9 @@ int show_line_range(struct line_range *lr __unused, const char *module __unused)
int show_available_vars(struct perf_probe_event *pevs __unused,
int npevs __unused, int max_vls __unused,
- const char *module __unused, bool externs __unused)
+ const char *module __unused,
+ struct strfilter *filter __unused,
+ bool externs __unused)
{
pr_warning("Debuginfo-analysis is not supported.\n");
return -ENOSYS;