linux-kernel - [PATCH 3/8] perf symbol: Save vmlinux or kallsyms path loaded

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1384806771-2945-4-git-send-email-dsahern@gmail.com>
Date:	Mon, 18 Nov 2013 13:32:46 -0700
From:	David Ahern <dsahern@...il.com>
To:	acme@...stprotocols.net, linux-kernel@...r.kernel.org
Cc:	David Ahern <dsahern@...il.com>, Ingo Molnar <mingo@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 3/8] perf symbol: Save vmlinux or kallsyms path loaded

Save vmlinux or kallsyms path loaded using embedded default lookup (ie.,
not a user specified path). Upcoming perf sched timehist command requires
kernel symbols for properly computing idle times and prints a warning
if the kernel symbols are not loaded.

Signed-off-by: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
---
 tools/perf/util/symbol.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index f55c18da1e40..915eb6c4a248 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1437,6 +1437,8 @@ int dso__load_vmlinux(struct dso *dso, struct map *map,
 			dso->data_type = DSO_BINARY_TYPE__VMLINUX;
 		dso__set_long_name(dso, (char *)vmlinux);
 		dso__set_loaded(dso, map->type);
+		if (symbol_conf.vmlinux_name == NULL)
+			symbol_conf.vmlinux_name = strdup(symfs_vmlinux);
 		pr_debug("Using %s for symbols\n", symfs_vmlinux);
 	}
 
@@ -1629,8 +1631,11 @@ static int dso__load_kernel_sym(struct dso *dso, struct map *map,
 
 do_kallsyms:
 	err = dso__load_kallsyms(dso, kallsyms_filename, map, filter);
-	if (err > 0)
+	if (err > 0) {
+		if (symbol_conf.kallsyms_name == NULL)
+			symbol_conf.kallsyms_name = strdup(kallsyms_filename);
 		pr_debug("Using %s for symbols\n", kallsyms_filename);
+	}
 	free(kallsyms_allocated_filename);
 
 	if (err > 0 && !dso__is_kcore(dso)) {
-- 
1.8.3.4 (Apple Git-47)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/