perf tools: Refine parse/config callchain functions

Pass global callchain_param into parse_callchain_record_opt and
perf_evsel__config_callgraph as parameter. So we can reuse these
functions to parse/config local param for callchain.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438677022-34296-3-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 15 insertions, 14 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f51131b11ad7..25cf6b404e8a 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -779,7 +779,7 @@ int record_parse_callchain_opt(const struct option *opt,
                 return 0;
         }
 
-        ret = parse_callchain_record_opt(arg);
+        ret = parse_callchain_record_opt(arg, &callchain_param);
         if (!ret)
                 callchain_debug();
 
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 9f643ee77001..931cca8e6ae8 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -53,7 +53,7 @@ static int get_stack_size(const char *str, unsigned long *_size)
 }
 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
 
-int parse_callchain_record_opt(const char *arg)
+int parse_callchain_record_opt(const char *arg, struct callchain_param *param)
 {
         char *tok, *name, *saveptr = NULL;
         char *buf;
@@ -73,7 +73,7 @@ int parse_callchain_record_opt(const char *arg)
                 /* Framepointer style */
                 if (!strncmp(name, "fp", sizeof("fp"))) {
                         if (!strtok_r(NULL, ",", &saveptr)) {
-                                callchain_param.record_mode = CALLCHAIN_FP;
+                                param->record_mode = CALLCHAIN_FP;
                                 ret = 0;
                         } else
                                 pr_err("callchain: No more arguments "
@@ -86,20 +86,20 @@ int parse_callchain_record_opt(const char *arg)
                         const unsigned long default_stack_dump_size = 8192;
 
                         ret = 0;
-                        callchain_param.record_mode = CALLCHAIN_DWARF;
-                        callchain_param.dump_size = default_stack_dump_size;
+                        param->record_mode = CALLCHAIN_DWARF;
+                        param->dump_size = default_stack_dump_size;
 
                         tok = strtok_r(NULL, ",", &saveptr);
                         if (tok) {
                                 unsigned long size = 0;
 
                                 ret = get_stack_size(tok, &size);
-                                callchain_param.dump_size = size;
+                                param->dump_size = size;
                         }
 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
                 } else if (!strncmp(name, "lbr", sizeof("lbr"))) {
                         if (!strtok_r(NULL, ",", &saveptr)) {
-                                callchain_param.record_mode = CALLCHAIN_LBR;
+                                param->record_mode = CALLCHAIN_LBR;
                                 ret = 0;
                         } else
                                 pr_err("callchain: No more arguments "
@@ -219,7 +219,7 @@ int perf_callchain_config(const char *var, const char *value)
         var += sizeof("call-graph.") - 1;
 
         if (!strcmp(var, "record-mode"))
-                return parse_callchain_record_opt(value);
+                return parse_callchain_record_opt(value, &callchain_param);
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
         if (!strcmp(var, "dump-size")) {
                 unsigned long size = 0;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 679c2c6d8ade..68a32c2fe87a 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -177,7 +177,7 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
                         bool hide_unresolved);
 
 extern const char record_callchain_help[];
-int parse_callchain_record_opt(const char *arg);
+int parse_callchain_record_opt(const char *arg, struct callchain_param *param);
 int parse_callchain_report_opt(const char *arg);
 int perf_callchain_config(const char *var, const char *value);
 
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 7febfe255703..f572f469a30d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -545,14 +545,15 @@ int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
 
 static void
 perf_evsel__config_callgraph(struct perf_evsel *evsel,
-                             struct record_opts *opts)
+                             struct record_opts *opts,
+                             struct callchain_param *param)
 {
         bool function = perf_evsel__is_function_event(evsel);
         struct perf_event_attr *attr = &evsel->attr;
 
         perf_evsel__set_sample_bit(evsel, CALLCHAIN);
 
-        if (callchain_param.record_mode == CALLCHAIN_LBR) {
+        if (param->record_mode == CALLCHAIN_LBR) {
                 if (!opts->branch_stack) {
                         if (attr->exclude_user) {
                                 pr_warning("LBR callstack option is only available "
@@ -568,12 +569,12 @@ perf_evsel__config_callgraph(struct perf_evsel *evsel,
                                     "Falling back to framepointers.\n");
         }
 
-        if (callchain_param.record_mode == CALLCHAIN_DWARF) {
+        if (param->record_mode == CALLCHAIN_DWARF) {
                 if (!function) {
                         perf_evsel__set_sample_bit(evsel, REGS_USER);
                         perf_evsel__set_sample_bit(evsel, STACK_USER);
                         attr->sample_regs_user = PERF_REGS_MASK;
-                        attr->sample_stack_user = callchain_param.dump_size;
+                        attr->sample_stack_user = param->dump_size;
                         attr->exclude_callchain_user = 1;
                 } else {
                         pr_info("Cannot use DWARF unwind for function trace event,"
@@ -714,7 +715,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
                 evsel->attr.exclude_callchain_user = 1;
 
         if (callchain_param.enabled && !evsel->no_aux_samples)
-                perf_evsel__config_callgraph(evsel, opts);
+                perf_evsel__config_callgraph(evsel, opts, &callchain_param);
 
         if (opts->sample_intr_regs) {
                 attr->sample_regs_intr = PERF_REGS_MASK;