perf evlist: Introduce perf_evlist__add_attrs

Replacing the open coded equivalents in 'perf stat'.

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-1btwadnf2tds2g07hsccsdse@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

3 files changed, 48 insertions, 33 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 7d98676808d8..227befbecec8 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1107,22 +1107,13 @@ static const struct option options[] = {
  */
 static int add_default_attributes(void)
 {
-        struct perf_evsel *pos;
-        size_t attr_nr = 0;
-        size_t c;
-
         /* Set attrs if no event is selected and !null_run: */
         if (null_run)
                 return 0;
 
         if (!evsel_list->nr_entries) {
-                for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
-                        pos = perf_evsel__new(default_attrs + c, c + attr_nr);
-                        if (pos == NULL)
-                                return -1;
-                        perf_evlist__add(evsel_list, pos);
-                }
-                attr_nr += c;
+                if (perf_evlist__add_attrs_array(evsel_list, default_attrs) < 0)
+                        return -1;
         }
 
         /* Detailed events get appended to the event list: */
@@ -1131,38 +1122,21 @@ static int add_default_attributes(void)
                 return 0;
 
         /* Append detailed run extra attributes: */
-        for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
-                pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
-                if (pos == NULL)
-                        return -1;
-                perf_evlist__add(evsel_list, pos);
-        }
-        attr_nr += c;
+        if (perf_evlist__add_attrs_array(evsel_list, detailed_attrs) < 0)
+                return -1;
 
         if (detailed_run < 2)
                 return 0;
 
         /* Append very detailed run extra attributes: */
-        for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
-                pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
-                if (pos == NULL)
-                        return -1;
-                perf_evlist__add(evsel_list, pos);
-        }
+        if (perf_evlist__add_attrs_array(evsel_list, very_detailed_attrs) < 0)
+                return -1;
 
         if (detailed_run < 3)
                 return 0;
 
         /* Append very, very detailed run extra attributes: */
-        for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
-                pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
-                if (pos == NULL)
-                        return -1;
-                perf_evlist__add(evsel_list, pos);
-        }
-
-
-        return 0;
+        return perf_evlist__add_attrs_array(evsel_list, very_very_detailed_attrs);
 }
 
 int cmd_stat(int argc, const char **argv, const char *prefix __used)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index fbb4b4ab9cc6..58aa1e0092bd 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -13,6 +13,8 @@
 #include "evsel.h"
 #include "util.h"
 
+#include "parse-events.h"
+
 #include <sys/mman.h>
 
 #include <linux/bitops.h>
@@ -76,6 +78,14 @@ void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry)
         ++evlist->nr_entries;
 }
 
+static void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
+                                          struct list_head *list,
+                                          int nr_entries)
+{
+        list_splice_tail(list, &evlist->entries);
+        evlist->nr_entries += nr_entries;
+}
+
 int perf_evlist__add_default(struct perf_evlist *evlist)
 {
         struct perf_event_attr attr = {
@@ -100,6 +110,30 @@ error:
         return -ENOMEM;
 }
 
+int perf_evlist__add_attrs(struct perf_evlist *evlist,
+                           struct perf_event_attr *attrs, size_t nr_attrs)
+{
+        struct perf_evsel *evsel, *n;
+        LIST_HEAD(head);
+        size_t i;
+
+        for (i = 0; i < nr_attrs; i++) {
+                evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i);
+                if (evsel == NULL)
+                        goto out_delete_partial_list;
+                list_add_tail(&evsel->node, &head);
+        }
+
+        perf_evlist__splice_list_tail(evlist, &head, nr_attrs);
+
+        return 0;
+
+out_delete_partial_list:
+        list_for_each_entry_safe(evsel, n, &head, node)
+                perf_evsel__delete(evsel);
+        return -1;
+}
+
 void perf_evlist__disable(struct perf_evlist *evlist)
 {
         int cpu, thread;
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 1779ffef7828..57d91ff2c56a 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -2,8 +2,10 @@
 #define __PERF_EVLIST_H 1
 
 #include <linux/list.h>
+#include <stdio.h>
 #include "../perf.h"
 #include "event.h"
+#include "util.h"
 
 struct pollfd;
 struct thread_map;
@@ -39,6 +41,11 @@ void perf_evlist__delete(struct perf_evlist *evlist);
 
 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
 int perf_evlist__add_default(struct perf_evlist *evlist);
+int perf_evlist__add_attrs(struct perf_evlist *evlist,
+                           struct perf_event_attr *attrs, size_t nr_attrs);
+
+#define perf_evlist__add_attrs_array(evlist, array) \
+        perf_evlist__add_attrs(evlist, array, ARRAY_SIZE(array))
 
 void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
                          int cpu, int thread, u64 id);