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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-08-29 08:07:22 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-09-29 16:41:37 -0300
commitf2add9cd66c87baea6762b099ee38ee742207699 (patch)
tree3c25e91bb38b2098fa2640b93caa1080b85cfbda /tools/perf/builtin-buildid-list.c
parent63e03724b51e7315a66a3f1fee6cb8b4a16dc8cc (diff)
downloadlinux-f2add9cd66c87baea6762b099ee38ee742207699.tar.gz
perf buildid-list: Add option to show the running kernel build id
[root@emilia ~]# perf buildid-list -k 07b0c016a2b30004e86132d0239945b1e88f5d75 Useful when diagnosing build id problems in debuginfo packages, etc. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-po1bl7acn6e1hhne90opmvtl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-buildid-list.c')
-rw-r--r--tools/perf/builtin-buildid-list.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 5af32ae9031e..4102eadcf849 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -1,7 +1,8 @@
/*
* builtin-buildid-list.c
*
- * Builtin buildid-list command: list buildids in perf.data
+ * Builtin buildid-list command: list buildids in perf.data or in the running
+ * kernel.
*
* Copyright (C) 2009, Red Hat Inc.
* Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
@@ -17,6 +18,7 @@
static char const *input_name = "perf.data";
static bool force;
+static bool show_kernel;
static bool with_hits;
static const char * const buildid_list_usage[] = {
@@ -29,12 +31,13 @@ static const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
+ OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose"),
OPT_END()
};
-static int __cmd_buildid_list(void)
+static int perf_session__list_build_ids(void)
{
struct perf_session *session;
@@ -52,6 +55,30 @@ static int __cmd_buildid_list(void)
return 0;
}
+static int sysfs__fprintf_build_id(FILE *fp)
+{
+ u8 kallsyms_build_id[BUILD_ID_SIZE];
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+ if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
+ sizeof(kallsyms_build_id)) != 0)
+ return -1;
+
+ build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
+ sbuild_id);
+ fprintf(fp, "%s\n", sbuild_id);
+ return 0;
+}
+
+static int __cmd_buildid_list(void)
+{
+
+ if (show_kernel)
+ return sysfs__fprintf_build_id(stdout);
+
+ return perf_session__list_build_ids();
+}
+
int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
{
argc = parse_options(argc, argv, options, buildid_list_usage, 0);