perf probe: Show all cached probes
perf probe --list shows all cached probes when --cache is given. Each
caches are shown with on which binary that probed. E.g.:
-----
# perf probe --cache vfs_read \$params
# perf probe --cache -x /lib64/libc-2.17.so getaddrinfo \$params
# perf probe --cache --list
[kernel.kallsyms] (1466a0a250b5d0070c6d0f03c5fed30b237970a1):
vfs_read $params
/usr/lib64/libc-2.17.so (c31ffe7942bfd77b2fca8f9bd5709d387a86d3bc):
getaddrinfo $params
-----
Note that $params requires debuginfo.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/146736020674.27797.13488316780383460180.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index a94ee47..156e3d8 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -367,10 +367,17 @@
{
char cpath[PATH_MAX];
char sbuildid[SBUILD_ID_SIZE];
- char *dir_name;
+ char *dir_name = NULL;
bool is_kallsyms = !target;
int ret, fd;
+ if (target && build_id_cache__cached(target)) {
+ /* This is a cached buildid */
+ strncpy(sbuildid, target, SBUILD_ID_SIZE);
+ dir_name = build_id_cache__linkname(sbuildid, NULL, 0);
+ goto found;
+ }
+
if (target)
ret = filename__sprintf_build_id(target, sbuildid);
else {
@@ -394,8 +401,11 @@
dir_name = build_id_cache__cachedir(sbuildid, target, is_kallsyms,
false);
- if (!dir_name)
+found:
+ if (!dir_name) {
+ pr_debug("Failed to get cache from %s\n", target);
return -ENOMEM;
+ }
snprintf(cpath, PATH_MAX, "%s/probes", dir_name);
fd = open(cpath, O_CREAT | O_RDWR, 0644);
@@ -673,3 +683,55 @@
out:
return ret;
}
+
+static int probe_cache__show_entries(struct probe_cache *pcache,
+ struct strfilter *filter)
+{
+ struct probe_cache_entry *entry;
+ char buf[128], *ptr;
+
+ list_for_each_entry(entry, &pcache->entries, node) {
+ if (entry->pev.event) {
+ ptr = buf;
+ snprintf(buf, 128, "%s:%s",
+ entry->pev.group, entry->pev.event);
+ } else
+ ptr = entry->spev;
+ if (strfilter__compare(filter, ptr))
+ printf("%s\n", entry->spev);
+ }
+ return 0;
+}
+
+/* Show all cached probes */
+int probe_cache__show_all_caches(struct strfilter *filter)
+{
+ struct probe_cache *pcache;
+ struct strlist *bidlist;
+ struct str_node *nd;
+ char *buf = strfilter__string(filter);
+
+ pr_debug("list cache with filter: %s\n", buf);
+ free(buf);
+
+ bidlist = build_id_cache__list_all();
+ if (!bidlist) {
+ pr_debug("Failed to get buildids: %d\n", errno);
+ return -EINVAL;
+ }
+ strlist__for_each_entry(nd, bidlist) {
+ pcache = probe_cache__new(nd->s);
+ if (!pcache)
+ continue;
+ if (!list_empty(&pcache->entries)) {
+ buf = build_id_cache__origname(nd->s);
+ printf("%s (%s):\n", buf, nd->s);
+ free(buf);
+ probe_cache__show_entries(pcache, filter);
+ }
+ probe_cache__delete(pcache);
+ }
+ strlist__delete(bidlist);
+
+ return 0;
+}