perf tools: Add global list of opened dso objects

Adding global list of opened dso objects, so we can
track them and use the list for caching dso data file
descriptors.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-5-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

2 files changed, 40 insertions, 2 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 5acb4b8b35d7..5d7c7bcc6276 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -136,7 +136,22 @@ int dso__read_binary_type_filename(const struct dso *dso,
         return ret;
 }
 
-static int open_dso(struct dso *dso, struct machine *machine)
+/*
+ * Global list of open DSOs.
+ */
+static LIST_HEAD(dso__data_open);
+
+static void dso__list_add(struct dso *dso)
+{
+        list_add_tail(&dso->data.open_entry, &dso__data_open);
+}
+
+static void dso__list_del(struct dso *dso)
+{
+        list_del(&dso->data.open_entry);
+}
+
+static int __open_dso(struct dso *dso, struct machine *machine)
 {
         int fd;
         char *root_dir = (char *)"";
@@ -159,14 +174,35 @@ static int open_dso(struct dso *dso, struct machine *machine)
         return fd;
 }
 
-void dso__data_close(struct dso *dso)
+static int open_dso(struct dso *dso, struct machine *machine)
+{
+        int fd = __open_dso(dso, machine);
+
+        if (fd > 0)
+                dso__list_add(dso);
+
+        return fd;
+}
+
+static void close_data_fd(struct dso *dso)
 {
         if (dso->data.fd >= 0) {
                 close(dso->data.fd);
                 dso->data.fd = -1;
+                dso__list_del(dso);
         }
 }
 
+static void close_dso(struct dso *dso)
+{
+        close_data_fd(dso);
+}
+
+void dso__data_close(struct dso *dso)
+{
+        close_dso(dso);
+}
+
 int dso__data_fd(struct dso *dso, struct machine *machine)
 {
         enum dso_binary_type binary_type_data[] = {
@@ -499,6 +535,7 @@ struct dso *dso__new(const char *name)
                 dso->kernel = DSO_TYPE_USER;
                 dso->needs_swap = DSO_SWAP__UNSET;
                 INIT_LIST_HEAD(&dso->node);
+                INIT_LIST_HEAD(&dso->data.open_entry);
         }
 
         return dso;
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index e48dcf59b570..90988bf06641 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -103,6 +103,7 @@ struct dso {
         struct {
                 struct rb_root   cache;
                 int              fd;
+                struct list_head open_entry;
         } data;
 
         char             name[0];