From: Masami Hiramatsu <mhiramat@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
linux-kernel@vger.kernel.org, Namhyung Kim <namhyung@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Hemant Kumar <hemant@linux.vnet.ibm.com>,
Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>,
Brendan Gregg <brendan.d.gregg@gmail.com>
Subject: [PATCH perf/core v11 19/20] perf probe: Search SDT/cached event from all probe caches
Date: Wed, 15 Jun 2016 12:30:41 +0900 [thread overview]
Message-ID: <20160615033040.31330.32457.stgit@devbox> (raw)
In-Reply-To: <20160615032728.31330.45150.stgit@devbox>
Search SDT/cached event from all probe caches if user doesn't
pass any binary. With this, we don't have to specify target
binary for SDT and named cached events (which start with %).
E.g. without this, a target binary must be passed with -x.
# perf probe -x /usr/lib64/libc-2.20.so -a %sdt_libc:\*
With this change, we don't need it anymore.
# perf probe -a %sdt_libc:\*
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
Changes from v10:
- Splitted from "perf probe: Allow wildcard for cached events"
---
tools/perf/util/probe-event.c | 105 ++++++++++++++++++++++++++++++++++-------
1 file changed, 86 insertions(+), 19 deletions(-)
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 7b41633..81e22f1 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -2557,41 +2557,60 @@ static int probe_trace_event__set_name(struct probe_trace_event *tev,
return 0;
}
-static int __add_probe_trace_events(struct perf_probe_event *pev,
- struct probe_trace_event *tevs,
- int ntevs, bool allow_suffix)
+static int __open_probe_file_and_namelist(bool uprobe,
+ struct strlist **namelist)
{
- int i, fd, ret;
- struct probe_trace_event *tev = NULL;
- struct probe_cache *cache = NULL;
- struct strlist *namelist;
+ int fd;
- fd = probe_file__open(PF_FL_RW | (pev->uprobes ? PF_FL_UPROBE : 0));
+ fd = probe_file__open(PF_FL_RW | (uprobe ? PF_FL_UPROBE : 0));
if (fd < 0)
return fd;
/* Get current event names */
- namelist = probe_file__get_namelist(fd);
- if (!namelist) {
+ *namelist = probe_file__get_namelist(fd);
+ if (!(*namelist)) {
pr_debug("Failed to get current event list.\n");
- ret = -ENOMEM;
- goto close_out;
+ close(fd);
+ return -ENOMEM;
}
+ return fd;
+}
+
+static int __add_probe_trace_events(struct perf_probe_event *pev,
+ struct probe_trace_event *tevs,
+ int ntevs, bool allow_suffix)
+{
+ int i, fd[2] = {-1, -1}, up, ret;
+ struct probe_trace_event *tev = NULL;
+ struct probe_cache *cache = NULL;
+ struct strlist *namelist[2] = {NULL, NULL};
+
+ up = pev->uprobes ? 1 : 0;
+ fd[up] = __open_probe_file_and_namelist(up, &namelist[up]);
+ if (fd[up] < 0)
+ return fd[up];
ret = 0;
for (i = 0; i < ntevs; i++) {
tev = &tevs[i];
+ up = tev->uprobes ? 1 : 0;
+ if (fd[up] == -1) { /* Open the kprobe/uprobe_events */
+ fd[up] = __open_probe_file_and_namelist(up,
+ &namelist[up]);
+ if (fd[up] < 0)
+ goto close_out;
+ }
/* Skip if the symbol is out of .text or blacklisted */
if (!tev->point.symbol && !pev->uprobes)
continue;
/* Set new name for tev (and update namelist) */
- ret = probe_trace_event__set_name(tev, pev, namelist,
+ ret = probe_trace_event__set_name(tev, pev, namelist[up],
allow_suffix);
if (ret < 0)
break;
- ret = probe_file__add_event(fd, tev);
+ ret = probe_file__add_event(fd[up], tev);
if (ret < 0)
break;
@@ -2614,9 +2633,12 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
probe_cache__delete(cache);
}
- strlist__delete(namelist);
close_out:
- close(fd);
+ for (up = 0; up < 2; up++) {
+ strlist__delete(namelist[up]);
+ if (fd[up] >= 0)
+ close(fd[up]);
+ }
return ret;
}
@@ -2989,6 +3011,48 @@ static int find_cached_events(struct perf_probe_event *pev,
return ret;
}
+/* Try to find probe_trace_event from all probe caches */
+static int find_cached_events_all(struct perf_probe_event *pev,
+ struct probe_trace_event **tevs)
+{
+ struct probe_trace_event *tmp_tevs = NULL;
+ struct strlist *bidlist;
+ struct str_node *nd;
+ char *pathname;
+ int ntevs = 0;
+ int ret;
+
+ /* Get the buildid list of all valid caches */
+ bidlist = build_id_cache__list_all(true);
+ if (!bidlist) {
+ ret = -errno;
+ pr_debug("Failed to get buildids: %d\n", ret);
+ return ret;
+ }
+
+ ret = 0;
+ strlist__for_each(nd, bidlist) {
+ pathname = build_id_cache__origname(nd->s);
+ ret = find_cached_events(pev, &tmp_tevs, pathname);
+ /* In the case of cnt == 0, we just skip it */
+ if (ret > 0)
+ ret = concat_probe_trace_events(tevs, &ntevs,
+ &tmp_tevs, ret);
+ free(pathname);
+ if (ret < 0)
+ break;
+ }
+ strlist__delete(bidlist);
+
+ if (ret < 0) {
+ clear_probe_trace_events(*tevs, ntevs);
+ zfree(tevs);
+ } else
+ ret = ntevs;
+
+ return ret;
+}
+
static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
struct probe_trace_event **tevs)
{
@@ -2998,10 +3062,13 @@ static int find_probe_trace_events_from_cache(struct perf_probe_event *pev,
struct str_node *node;
int ret, i;
- if (pev->sdt)
+ if (pev->sdt) {
/* For SDT/cached events, we use special search functions */
- return find_cached_events(pev, tevs, pev->target);
-
+ if (!pev->target)
+ return find_cached_events_all(pev, tevs);
+ else
+ return find_cached_events(pev, tevs, pev->target);
+ }
cache = probe_cache__new(pev->target);
if (!cache)
return 0;
next prev parent reply other threads:[~2016-06-15 3:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-15 3:27 [PATCH perf/core v11 00/20] perf-probe --cache and SDT support Masami Hiramatsu
2016-06-15 3:27 ` [PATCH perf/core v11 01/20] perf: util: Fix rm_rf() to handle non-regular files correctly Masami Hiramatsu
2016-06-15 3:27 ` [PATCH perf/core v11 02/20] perf-probe: Fix to add NULL check for strndup Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 03/20] perf-buildid: Rename and export build_id_cache__cachedir() Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 04/20] perf probe: Add perf_probe_event__copy() Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 05/20] perf probe: Recover and export synthesize_perf_probe_point() Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 06/20] perf probe-file: Introduce perf_cache interfaces Masami Hiramatsu
2016-06-16 8:39 ` [tip:perf/core] perf probe: " tip-bot for Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 07/20] perf probe: Add --cache option to cache the probe definitions Masami Hiramatsu
2016-06-15 17:38 ` Arnaldo Carvalho de Melo
2016-06-15 21:38 ` Masami Hiramatsu
2016-06-16 14:29 ` Arnaldo Carvalho de Melo
2016-06-16 23:48 ` Masami Hiramatsu
2016-06-16 8:39 ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2016-06-15 3:28 ` [PATCH perf/core v11 08/20] perf probe: Use cache entry if possible Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 09/20] perf probe: Show all cached probes Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 10/20] perf probe: Remove caches when --cache is given Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 11/20] perf/sdt: ELF support for SDT Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 12/20] perf probe: Add group name support Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 13/20] perf buildid-cache: Scan and import user SDT events to probe cache Masami Hiramatsu
2016-06-15 3:29 ` [PATCH perf/core v11 14/20] perf probe: Accept %sdt and %cached event name Masami Hiramatsu
2016-06-15 3:30 ` [PATCH perf/core v11 15/20] perf-list: Show SDT and pre-cached events Masami Hiramatsu
2016-06-15 3:30 ` [PATCH perf/core v11 16/20] perf-list: Skip SDTs placed in invalid binaries Masami Hiramatsu
2016-06-15 3:30 ` [PATCH perf/core v11 17/20] perf: probe-cache: Add for_each_probe_cache_entry() wrapper Masami Hiramatsu
2016-06-15 3:30 ` [PATCH perf/core v11 18/20] perf probe: Allow wildcard for cached events Masami Hiramatsu
2016-06-15 3:30 ` Masami Hiramatsu [this message]
2016-06-15 3:30 ` [PATCH perf/core v11 20/20] perf probe: Support @BUILDID or @FILE suffix for SDT events Masami Hiramatsu
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