diff options
| -rw-r--r-- | tools/perf/Documentation/perf-buildid-list.txt | 5 | ||||
| -rw-r--r-- | tools/perf/builtin-buildid-list.c | 31 |
2 files changed, 34 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-buildid-list.txt b/tools/perf/Documentation/perf-buildid-list.txt index 5eaac6f26d51..770a7f3bd754 100644 --- a/tools/perf/Documentation/perf-buildid-list.txt +++ b/tools/perf/Documentation/perf-buildid-list.txt @@ -16,6 +16,8 @@ This command displays the buildids found in a perf.data file, so that other tools can be used to fetch packages with matching symbol tables for use by perf report. +It can also be used to show the build id of the running kernel. + OPTIONS ------- -H:: @@ -27,6 +29,9 @@ OPTIONS -f:: --force:: Don't do ownership validation. +-k:: +--kernel:: + Show running kernel build id. -v:: --verbose:: Be more verbose. 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); |