linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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 16/20] perf-list: Skip SDTs placed in invalid binaries
Date: Wed, 15 Jun 2016 12:30:12 +0900	[thread overview]
Message-ID: <20160615033012.31330.15736.stgit@devbox> (raw)
In-Reply-To: <20160615032728.31330.45150.stgit@devbox>

From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

Skip SDTs placed in invalid (non-exist, or older version)
binaries. Note that perf-probe --cache --list and
perf-probe --cache --del still handle all the caches
including invalid binaries.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 Changes in v7:
  - Validate build-id via sysfs if it is for kallsyms,
 Changes in v4:
  - Rename a parameter 'valid' to 'validonly' :)
---
 tools/perf/builtin-probe.c     |    2 +-
 tools/perf/util/build-id.c     |   33 ++++++++++++++++++++++++++++++++-
 tools/perf/util/build-id.h     |    2 +-
 tools/perf/util/parse-events.c |    2 +-
 tools/perf/util/probe-file.c   |    2 +-
 5 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 6c2c0d1..03ea72d 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -370,7 +370,7 @@ static int del_perf_probe_caches(struct strfilter *filter)
 	struct str_node *nd;
 	int ret;
 
-	bidlist = build_id_cache__list_all();
+	bidlist = build_id_cache__list_all(false);
 	if (!bidlist) {
 		ret = -errno;
 		pr_debug("Failed to get buildids: %d\n", ret);
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 95d4490..a28ef39 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -206,6 +206,31 @@ out:
 	return ret;
 }
 
+/* Check if the given build_id cache is valid on current running system */
+static bool build_id_cache__valid_id(char *sbuild_id)
+{
+	char real_sbuild_id[SBUILD_ID_SIZE] = "";
+	char *pathname;
+	int ret = 0;
+	bool result = false;
+
+	pathname = build_id_cache__origname(sbuild_id);
+	if (!pathname)
+		return false;
+
+	if (!strcmp(pathname, DSO__NAME_KALLSYMS))
+		ret = sysfs__sprintf_build_id("/", real_sbuild_id);
+	else if (pathname[0] == '/')
+		ret = filename__sprintf_build_id(pathname, real_sbuild_id);
+	else
+		ret = -EINVAL;	/* Should we support other special DSO cache? */
+	if (ret >= 0)
+		result = (strcmp(sbuild_id, real_sbuild_id) == 0);
+	free(pathname);
+
+	return result;
+}
+
 static const char *build_id_cache__basename(bool is_kallsyms, bool is_vdso)
 {
 	return is_kallsyms ? "kallsyms" : (is_vdso ? "vdso" : "elf");
@@ -433,13 +458,17 @@ static bool lsdir_bid_tail_filter(const char *name __maybe_unused,
 	return (i == SBUILD_ID_SIZE - 3) && (d->d_name[i] == '\0');
 }
 
-struct strlist *build_id_cache__list_all(void)
+struct strlist *build_id_cache__list_all(bool validonly)
 {
 	struct strlist *toplist, *linklist = NULL, *bidlist;
 	struct str_node *nd, *nd2;
 	char *topdir, *linkdir = NULL;
 	char sbuild_id[SBUILD_ID_SIZE];
 
+	/* for filename__ functions */
+	if (validonly)
+		symbol__init(NULL);
+
 	/* Open the top-level directory */
 	if (asprintf(&topdir, "%s/.build-id/", buildid_dir) < 0)
 		return NULL;
@@ -470,6 +499,8 @@ struct strlist *build_id_cache__list_all(void)
 			if (snprintf(sbuild_id, SBUILD_ID_SIZE, "%s%s",
 				     nd->s, nd2->s) != SBUILD_ID_SIZE - 1)
 				goto err_out;
+			if (validonly && !build_id_cache__valid_id(sbuild_id))
+				continue;
 			if (strlist__add(bidlist, sbuild_id) < 0)
 				goto err_out;
 		}
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index b742e27..64e740f 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -34,7 +34,7 @@ char *build_id_cache__origname(const char *sbuild_id);
 char *build_id_cache__linkname(const char *sbuild_id, char *bf, size_t size);
 char *build_id_cache__cachedir(const char *sbuild_id, const char *name,
 			       bool is_kallsyms, bool is_vdso);
-struct strlist *build_id_cache__list_all(void);
+struct strlist *build_id_cache__list_all(bool validonly);
 int build_id_cache__list_build_ids(const char *pathname,
 				   struct strlist **result);
 bool build_id_cache__cached(const char *sbuild_id);
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 05bd505..54a4e2b 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2002,7 +2002,7 @@ void print_sdt_events(const char *subsys_glob, const char *event_glob,
 		pr_debug("Failed to allocate new strlist for SDT\n");
 		return;
 	}
-	bidlist = build_id_cache__list_all();
+	bidlist = build_id_cache__list_all(true);
 	if (!bidlist) {
 		pr_debug("Failed to get buildids: %d\n", errno);
 		return;
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index 0e22ef7..a6a2d60 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -806,7 +806,7 @@ int probe_cache__show_all_caches(struct strfilter *filter)
 	pr_debug("list cache with filter: %s\n", buf);
 	free(buf);
 
-	bidlist = build_id_cache__list_all();
+	bidlist = build_id_cache__list_all(false);
 	if (!bidlist) {
 		pr_debug("Failed to get buildids: %d\n", errno);
 		return -EINVAL;

  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 ` Masami Hiramatsu [this message]
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 ` [PATCH perf/core v11 19/20] perf probe: Search SDT/cached event from all probe caches Masami Hiramatsu
2016-06-15  3:30 ` [PATCH perf/core v11 20/20] perf probe: Support @BUILDID or @FILE suffix for SDT events Masami Hiramatsu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20160615033012.31330.15736.stgit@devbox \
    --to=mhiramat@kernel.org \
    --cc=acme@kernel.org \
    --cc=ananth@linux.vnet.ibm.com \
    --cc=brendan.d.gregg@gmail.com \
    --cc=hemant@linux.vnet.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=namhyung@kernel.org \
    --cc=peterz@infradead.org \
    --subject='Re: [PATCH perf/core v11 16/20] perf-list: Skip SDTs placed in invalid binaries' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox