From 61e076a2957ee73a05f0f78585c2dfd17ee2fa4b Mon Sep 17 00:00:00 2001
From: Jens-H <Jens-H@users.noreply.github.com>
Date: Sat, 28 Nov 2020 19:01:25 +0100
Subject: [PATCH] Fix LinuxEvents destructor to close all fd

---
 benchmarks/linux-perf-events.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/benchmarks/linux-perf-events.h b/benchmarks/linux-perf-events.h
index 2725205..46d9db9 100644
--- a/benchmarks/linux-perf-events.h
+++ b/benchmarks/linux-perf-events.h
@@ -53,7 +53,11 @@ template <int TYPE = PERF_TYPE_HARDWARE> class LinuxEvents {
     temp_result_vec.resize(num_events * 2 + 1);
   }
 
-  ~LinuxEvents() { close(fd); }
+  ~LinuxEvents() {
+      // This solution expects that the fds are increasing numbers without
+      // gaps. Certainly this is not always true.
+      for (int i = fd; fd - num_events - i != 0; i--) { close(i); }
+  }
 
   inline void start() {
     if (ioctl(fd, PERF_EVENT_IOC_RESET, PERF_IOC_FLAG_GROUP) == -1) {