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perf probe: Show accessible global variables

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Add --externs for allowing --vars to show accessible global (externally
defined) variables from a given probe point too.

This will give you a hint which globals can be accessible from the probe point.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20101021101335.3542.31003.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 2010-10-21 19:13:35 +09:00 • committed by Arnaldo Carvalho de Melo
parent c82ec0a2bd
commit fb8c5a56c7
6 changed files with 41 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

8
tools/perf/util/probe-event.c
View file

@ -379,7 +379,7 @@ end:
}
static int show_available_vars_at(int fd, struct perf_probe_event *pev,
int max_vls)
int max_vls, bool externs)
{
char *buf;
int ret, i;
@ -391,7 +391,7 @@ static int show_available_vars_at(int fd, struct perf_probe_event *pev,
return -EINVAL;
pr_debug("Searching variables at %s\n", buf);
ret = find_available_vars_at(fd, pev, &vls, max_vls);
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);
@ -421,7 +421,7 @@ static int show_available_vars_at(int fd, struct perf_probe_event *pev,
/* Show available variables on given probe point */
int show_available_vars(struct perf_probe_event *pevs, int npevs,
int max_vls)
int max_vls, bool externs)
{
int i, fd, ret = 0;
@ -438,7 +438,7 @@ 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);
ret = show_available_vars_at(fd, &pevs[i], max_vls, externs);
close(fd);
return ret;