perf record: Export record_opts based callchain parsing helper

To be able to call it outside option parsing, like when setting a
default --call-graph parameter in 'perf trace' when just --min-stack is
used.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-xay69plylwibpb3l4isrpl1k@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 26 insertions, 15 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3239a6ec9d23..5b4758a08a49 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -930,45 +930,50 @@ out_delete_session:
         return status;
 }
 
-static void callchain_debug(void)
+static void callchain_debug(struct callchain_param *callchain)
 {
         static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
 
-        pr_debug("callchain: type %s\n", str[callchain_param.record_mode]);
+        pr_debug("callchain: type %s\n", str[callchain->record_mode]);
 
-        if (callchain_param.record_mode == CALLCHAIN_DWARF)
+        if (callchain->record_mode == CALLCHAIN_DWARF)
                 pr_debug("callchain: stack dump size %d\n",
-                         callchain_param.dump_size);
+                         callchain->dump_size);
 }
 
-int record_parse_callchain_opt(const struct option *opt,
-                               const char *arg,
-                               int unset)
+int record_opts__parse_callchain(struct record_opts *record,
+                                 struct callchain_param *callchain,
+                                 const char *arg, bool unset)
 {
         int ret;
-        struct record_opts *record = (struct record_opts *)opt->value;
-
         record->callgraph_set = true;
-        callchain_param.enabled = !unset;
+        callchain->enabled = !unset;
 
         /* --no-call-graph */
         if (unset) {
-                callchain_param.record_mode = CALLCHAIN_NONE;
+                callchain->record_mode = CALLCHAIN_NONE;
                 pr_debug("callchain: disabled\n");
                 return 0;
         }
 
-        ret = parse_callchain_record_opt(arg, &callchain_param);
+        ret = parse_callchain_record_opt(arg, callchain);
         if (!ret) {
                 /* Enable data address sampling for DWARF unwind. */
-                if (callchain_param.record_mode == CALLCHAIN_DWARF)
+                if (callchain->record_mode == CALLCHAIN_DWARF)
                         record->sample_address = true;
-                callchain_debug();
+                callchain_debug(callchain);
         }
 
         return ret;
 }
 
+int record_parse_callchain_opt(const struct option *opt,
+                               const char *arg,
+                               int unset)
+{
+        return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
+}
+
 int record_callchain_opt(const struct option *opt,
                          const char *arg __maybe_unused,
                          int unset __maybe_unused)
@@ -981,7 +986,7 @@ int record_callchain_opt(const struct option *opt,
         if (callchain_param.record_mode == CALLCHAIN_NONE)
                 callchain_param.record_mode = CALLCHAIN_FP;
 
-        callchain_debug();
+        callchain_debug(&callchain_param);
         return 0;
 }
 
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index cae5a7b1f5c8..65e2a4f7cb4e 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -212,6 +212,12 @@ struct hist_entry;
 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
 int record_callchain_opt(const struct option *opt, const char *arg, int unset);
 
+struct record_opts;
+
+int record_opts__parse_callchain(struct record_opts *record,
+                                 struct callchain_param *callchain,
+                                 const char *arg, bool unset);
+
 int sample__resolve_callchain(struct perf_sample *sample,
                               struct callchain_cursor *cursor, struct symbol **parent,
                               struct perf_evsel *evsel, struct addr_location *al,