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@@ -1,7 +1,8 @@
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/*
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* builtin-buildid-list.c
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*
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- * Builtin buildid-list command: list buildids in perf.data
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+ * Builtin buildid-list command: list buildids in perf.data or in the running
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+ * kernel.
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*
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* Copyright (C) 2009, Red Hat Inc.
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* Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
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@@ -17,6 +18,7 @@
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static char const *input_name = "perf.data";
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static bool force;
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+static bool show_kernel;
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static bool with_hits;
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static const char * const buildid_list_usage[] = {
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@@ -29,12 +31,13 @@ static const struct option options[] = {
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OPT_STRING('i', "input", &input_name, "file",
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"input file name"),
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OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
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+ OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose"),
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OPT_END()
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};
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-static int __cmd_buildid_list(void)
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+static int perf_session__list_build_ids(void)
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{
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struct perf_session *session;
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@@ -52,6 +55,30 @@ static int __cmd_buildid_list(void)
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return 0;
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}
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+static int sysfs__fprintf_build_id(FILE *fp)
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+{
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+ u8 kallsyms_build_id[BUILD_ID_SIZE];
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+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
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+
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+ if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
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+ sizeof(kallsyms_build_id)) != 0)
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+ return -1;
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+
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+ build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
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+ sbuild_id);
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+ fprintf(fp, "%s\n", sbuild_id);
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+ return 0;
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+}
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+
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+static int __cmd_buildid_list(void)
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+{
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+
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+ if (show_kernel)
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+ return sysfs__fprintf_build_id(stdout);
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+
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+ return perf_session__list_build_ids();
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+}
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+
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int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, options, buildid_list_usage, 0);
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