forked from luck/tmp_suning_uos_patched
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>
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tools/perf
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@ -16,6 +16,8 @@ This command displays the buildids found in a perf.data file, so that other
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tools can be used to fetch packages with matching symbol tables for use by
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perf report.
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It can also be used to show the build id of the running kernel.
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OPTIONS
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-------
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-H::
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@ -27,6 +29,9 @@ OPTIONS
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-f::
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--force::
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Don't do ownership validation.
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-k::
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--kernel::
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Show running kernel build id.
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-v::
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--verbose::
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Be more verbose.
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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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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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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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static int __cmd_buildid_list(void)
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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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return perf_session__list_build_ids();
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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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