perf record: Add --buildid-mmap option to enable PERF_RECORD_MMAP2's build id

[linux-2.6-microblaze.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index fd39116..7bb10e9 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -102,6 +102,7 @@ struct record {
        bool                    no_buildid_cache;
        bool                    no_buildid_cache_set;
        bool                    buildid_all;
+       bool                    buildid_mmap;
        bool                    timestamp_filename;
        bool                    timestamp_boundary;
        struct switch_output    switch_output;
@@ -2135,6 +2136,8 @@ static int perf_record_config(const char *var, const char *value, void *cb)
                        rec->no_buildid_cache = true;
                else if (!strcmp(value, "skip"))
                        rec->no_buildid = true;
+               else if (!strcmp(value, "mmap"))
+                       rec->buildid_mmap = true;
                else
                        return -1;
                return 0;
@@ -2552,6 +2555,8 @@ static struct option __record_options[] = {
                   "file", "vmlinux pathname"),
        OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
                    "Record build-id of all DSOs regardless of hits"),
+       OPT_BOOLEAN(0, "buildid-mmap", &record.buildid_mmap,
+                   "Record build-id in map events"),
        OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
                    "append timestamp to output filename"),
        OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary,
@@ -2655,6 +2660,21 @@ int cmd_record(int argc, const char **argv)
 
        }
 
+       if (rec->buildid_mmap) {
+               if (!perf_can_record_build_id()) {
+                       pr_err("Failed: no support to record build id in mmap events, update your kernel.\n");
+                       err = -EINVAL;
+                       goto out_opts;
+               }
+               pr_debug("Enabling build id in mmap2 events.\n");
+               /* Enable mmap build id synthesizing. */
+               symbol_conf.buildid_mmap2 = true;
+               /* Enable perf_event_attr::build_id bit. */
+               rec->opts.build_id = true;
+               /* Disable build id cache. */
+               rec->no_buildid = true;
+       }
+
        if (rec->opts.kcore)
                rec->data.is_dir = true;