stats: Provide a mechanism to get a callback when stats are dumped.

This mechanism is useful for dumping output that is correlated with stats
dumping, but isn't tracked by the gem5 statistics.

2 files changed, 13 insertions, 0 deletions

diff --git a/src/base/statistics.cc b/src/base/statistics.cc
index 545d08cab..8034625be 100644
--- a/src/base/statistics.cc
+++ b/src/base/statistics.cc
@@ -433,6 +433,7 @@ Formula::str() const
     return root ? root->str() : "";
 }
 
+CallbackQueue dumpQueue;
 CallbackQueue resetQueue;
 
 void
@@ -458,6 +459,12 @@ enable()
     _enabled = true;
 }
 
+void
+registerDumpCallback(Callback *cb)
+{
+    dumpQueue.add(cb);
+}
+
 } // namespace Stats
 
 void
diff --git a/src/base/statistics.hh b/src/base/statistics.hh
index 67c09bb6a..c36f8f461 100644
--- a/src/base/statistics.hh
+++ b/src/base/statistics.hh
@@ -3135,6 +3135,12 @@ bool enabled();
  */
 void registerResetCallback(Callback *cb);
 
+/**
+ * Register a callback that should be called whenever statistics are
+ * about to be dumped
+ */
+void registerDumpCallback(Callback *cb);
+
 std::list<Info *> &statsList();
 
 } // namespace Stats