eventloop: bound pending enter and proc-fd caches (task 425)

2 files changed, 18 insertions, 2 deletions

diff --git a/internal/event/pair.go b/internal/event/pair.go
index 131c6b3..3eb8a16 100644
--- a/internal/event/pair.go
+++ b/internal/event/pair.go
@@ -120,8 +120,14 @@ func (e *Pair) Dump() string {
 }
 
 func (e *Pair) Recycle() {
-	e.EnterEv.Recycle()
-	e.ExitEv.Recycle()
+	if e.EnterEv != nil {
+		e.EnterEv.Recycle()
+	}
+	if e.ExitEv != nil {
+		e.ExitEv.Recycle()
+	}
+	e.EnterEv = nil
+	e.ExitEv = nil
 	e.File = nil
 	e.Comm = ""
 	e.Duration = 0
diff --git a/internal/event/pair_test.go b/internal/event/pair_test.go
index 43e9945..eb033dc 100644
--- a/internal/event/pair_test.go
+++ b/internal/event/pair_test.go
@@ -55,3 +55,13 @@ func TestPairCalculateDurationsWithPreviousExit(t *testing.T) {
 		t.Fatalf("DurationToPrev = %d, want 500", pair.DurationToPrev)
 	}
 }
+
+func TestPairRecycleHandlesMissingExitEvent(t *testing.T) {
+	pair := NewPair(&types.OpenEvent{
+		Time: 1000,
+		Pid:  1,
+		Tid:  2,
+	})
+
+	pair.Recycle()
+}