perf hists: Add hists__filter_by_symbol

This function will be used for simple (sub-)string matching filter based
on user input.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1331887855-874-1-git-send-email-namhyung.kim@lge.com
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 8380c3d..2c624ad 100644 (file)
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -10,11 +10,14 @@ static bool hists__filter_entry_by_dso(struct hists *hists,
                                       struct hist_entry *he);
 static bool hists__filter_entry_by_thread(struct hists *hists,
                                          struct hist_entry *he);
+static bool hists__filter_entry_by_symbol(struct hists *hists,
+                                         struct hist_entry *he);
 
 enum hist_filter {
        HIST_FILTER__DSO,
        HIST_FILTER__THREAD,
        HIST_FILTER__PARENT,
+       HIST_FILTER__SYMBOL,
 };
 
 struct callchain_param callchain_param = {
@@ -420,6 +423,7 @@ static void hists__apply_filters(struct hists *hists, struct hist_entry *he)
 {
        hists__filter_entry_by_dso(hists, he);
        hists__filter_entry_by_thread(hists, he);
+       hists__filter_entry_by_symbol(hists, he);
 }
 
 static void __hists__collapse_resort(struct hists *hists, bool threaded)
@@ -1247,6 +1251,37 @@ void hists__filter_by_thread(struct hists *hists)
        }
 }
 
+static bool hists__filter_entry_by_symbol(struct hists *hists,
+                                         struct hist_entry *he)
+{
+       if (hists->symbol_filter_str != NULL &&
+           (!he->ms.sym || strstr(he->ms.sym->name,
+                                  hists->symbol_filter_str) == NULL)) {
+               he->filtered |= (1 << HIST_FILTER__SYMBOL);
+               return true;
+       }
+
+       return false;
+}
+
+void hists__filter_by_symbol(struct hists *hists)
+{
+       struct rb_node *nd;
+
+       hists->nr_entries = hists->stats.total_period = 0;
+       hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
+       hists__reset_col_len(hists);
+
+       for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
+               struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+
+               if (hists__filter_entry_by_symbol(hists, h))
+                       continue;
+
+               hists__remove_entry_filter(hists, h, HIST_FILTER__SYMBOL);
+       }
+}
+
 int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
 {
        return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 9413f3e..10343c0 100644 (file)
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -62,6 +62,7 @@ struct hists {
        const struct thread     *thread_filter;
        const struct dso        *dso_filter;
        const char              *uid_filter_str;
+       const char              *symbol_filter_str;
        pthread_mutex_t         lock;
        struct events_stats     stats;
        u64                     event_stream;
@@ -107,6 +108,7 @@ int hist_entry__annotate(struct hist_entry *self, size_t privsize);
 
 void hists__filter_by_dso(struct hists *hists);
 void hists__filter_by_thread(struct hists *hists);
+void hists__filter_by_symbol(struct hists *hists);
 
 u16 hists__col_len(struct hists *self, enum hist_column col);
 void hists__set_col_len(struct hists *self, enum hist_column col, u16 len);