perf tools: Add dso__data_status_seen()

Add a function to track whether a caller has seen the data status of a
dso.  This is needed to enable callers to report the error exactly once
only per dso.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406035081-14301-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 8827db3d2cba..84e4a0546a31 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -359,6 +359,18 @@ out:
         return dso->data.fd;
 }
 
+bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
+{
+        u32 flag = 1 << by;
+
+        if (dso->data.status_seen & flag)
+                return true;
+
+        dso->data.status_seen |= flag;
+
+        return false;
+}
+
 static void
 dso_cache__free(struct rb_root *root)
 {
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index aeb7bcbf0239..c805f604da1f 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -46,6 +46,10 @@ enum dso_data_status {
         DSO_DATA_STATUS_OK      = 1,
 };
 
+enum dso_data_status_seen {
+        DSO_DATA_STATUS_SEEN_ITRACE,
+};
+
 #define DSO__SWAP(dso, type, val)                       \
 ({                                                      \
         type ____r = val;                               \
@@ -111,6 +115,7 @@ struct dso {
                 struct rb_root   cache;
                 int              fd;
                 int              status;
+                u32              status_seen;
                 size_t           file_size;
                 struct list_head open_entry;
         } data;
@@ -203,6 +208,7 @@ ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
                             struct machine *machine, u64 addr,
                             u8 *data, ssize_t size);
+bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
 
 struct map *dso__new_map(const char *name);
 struct dso *dso__kernel_findnew(struct machine *machine, const char *name,