perf annotate: Move locking to struct annotation

Since we'll need it when implementing the live annotate TUI browser.

This also simplifies things a bit by having the list head for the source
code to be in the dynamicly allocated part of struct annotation, that
way we don't have to pass it around, it can be found from the struct
symbol that is passed everywhere.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 20 insertions, 14 deletions

diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index bc08b36a713a..b237c8678c22 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -28,22 +28,29 @@ struct source_line {
         char            *path;
 };
 
-/** struct annotation - symbols with hits have this attached as in sannotation
+/** struct annotated_source - symbols with hits have this attached as in sannotation
  *
  * @histogram: Array of addr hit histograms per event being monitored
- * @src_line: If 'print_lines' is specified, per source code line percentages
+ * @lines: If 'print_lines' is specified, per source code line percentages
+ * @source: source parsed from objdump -dS
  *
- * src_line is allocated, percentages calculated and all sorted by percentage
+ * lines is allocated, percentages calculated and all sorted by percentage
  * when the annotation is about to be presented, so the percentages are for
  * one of the entries in the histogram array, i.e. for the event/counter being
  * presented. It is deallocated right after symbol__{tui,tty,etc}_annotate
  * returns.
  */
-struct annotation {
-        struct source_line *src_line;
-        struct sym_hist    *histograms;
+struct annotated_source {
+        struct list_head   source;
+        struct source_line *lines;
         int                nr_histograms;
         int                sizeof_sym_hist;
+        struct sym_hist    histograms[0];
+};
+
+struct annotation {
+        pthread_mutex_t         lock;
+        struct annotated_source *src;
 };
 
 struct sannotation {
@@ -53,7 +60,8 @@ struct sannotation {
 
 static inline struct sym_hist *annotation__histogram(struct annotation *notes, int idx)
 {
-        return ((void *)notes->histograms) + (notes->sizeof_sym_hist * idx);
+        return (((void *)&notes->src->histograms) +
+                (notes->src->sizeof_sym_hist * idx));
 }
 
 static inline struct annotation *symbol__annotation(struct symbol *sym)
@@ -67,14 +75,12 @@ int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 int symbol__alloc_hist(struct symbol *sym, int nevents);
 void symbol__annotate_zero_histograms(struct symbol *sym);
 
-int symbol__annotate(struct symbol *sym, struct map *map,
-                     struct list_head *head, size_t privsize);
-int symbol__annotate_printf(struct symbol *sym, struct map *map,
-                            struct list_head *head, int evidx, bool full_paths,
-                            int min_pcnt, int max_lines);
+int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize);
+int symbol__annotate_init(struct map *map __used, struct symbol *sym);
+int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
+                            bool full_paths, int min_pcnt, int max_lines);
 void symbol__annotate_zero_histogram(struct symbol *sym, int evidx);
-void symbol__annotate_decay_histogram(struct symbol *sym,
-                                      struct list_head *head, int evidx);
+void symbol__annotate_decay_histogram(struct symbol *sym, int evidx);
 void objdump_line_list__purge(struct list_head *head);
 
 int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,