1 files changed, 74 insertions, 0 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 75d230fef202..1c49d4e8767c 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -638,6 +638,77 @@ out_delete_session:
         return err;
 }
 
+#define BRANCH_OPT(n, m) \
+        { .name = n, .mode = (m) }
+
+#define BRANCH_END { .name = NULL }
+
+struct branch_mode {
+        const char *name;
+        int mode;
+};
+
+static const struct branch_mode branch_modes[] = {
+        BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
+        BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
+        BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
+        BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
+        BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
+        BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
+        BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
+        BRANCH_END
+};
+
+static int
+parse_branch_stack(const struct option *opt, const char *str, int unset __used)
+{
+#define ONLY_PLM \
+        (PERF_SAMPLE_BRANCH_USER        |\
+         PERF_SAMPLE_BRANCH_KERNEL      |\
+         PERF_SAMPLE_BRANCH_HV)
+
+        uint64_t *mode = (uint64_t *)opt->value;
+        const struct branch_mode *br;
+        char *s, *os, *p;
+        int ret = -1;
+
+        *mode = 0;
+
+        /* because str is read-only */
+        s = os = strdup(str);
+        if (!s)
+                return -1;
+
+        for (;;) {
+                p = strchr(s, ',');
+                if (p)
+                        *p = '\0';
+
+                for (br = branch_modes; br->name; br++) {
+                        if (!strcasecmp(s, br->name))
+                                break;
+                }
+                if (!br->name)
+                        goto error;
+
+                *mode |= br->mode;
+
+                if (!p)
+                        break;
+
+                s = p + 1;
+        }
+        ret = 0;
+
+        if ((*mode & ~ONLY_PLM) == 0) {
+                error("need at least one branch type with -b\n");
+                ret = -1;
+        }
+error:
+        free(os);
+        return ret;
+}
+
 static const char * const record_usage[] = {
         "perf record [<options>] [<command>]",
         "perf record [<options>] -- <command> [<options>]",
@@ -727,6 +798,9 @@ const struct option record_options[] = {
                      "monitor event in cgroup name only",
                      parse_cgroups),
         OPT_STRING('u', "uid", &record.uid_str, "user", "user to profile"),
+        OPT_CALLBACK('b', "branch-stack", &record.opts.branch_stack,
+                     "branch mode mask", "branch stack sampling modes",
+                     parse_branch_stack),
         OPT_END()
 };