From da90797f0cb3446f731236dfcc891c30192b48ca Mon Sep 17 00:00:00 2001
From: Ghanan Gowripalan <ghanan@google.com>
Date: Thu, 12 Oct 2023 15:01:28 -0700
Subject: [PATCH] Zero `fd_set` in `select_benchmark`

This is fixing a bug that caused the test to fail on ARM64 when running
under Starnix on Fuchsia. https://ci.chromium.org/b/8767565962564011473
is an example failing run.

PiperOrigin-RevId: 573021699
---
 test/perf/linux/select_benchmark.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/perf/linux/select_benchmark.cc b/test/perf/linux/select_benchmark.cc
index 1b2a92ae6..803310d50 100644
--- a/test/perf/linux/select_benchmark.cc
+++ b/test/perf/linux/select_benchmark.cc
@@ -36,6 +36,8 @@ namespace {
 void Setup(int count, std::vector<FileDescriptor>& event_fds, fd_set& read_fds,
            int& max_fd) {
   max_fd = -1;
+  FD_ZERO(&read_fds);
+
   for (int i = 0; i < count; ++i) {
     FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(NewEventFD());
     if (fd.get() > max_fd) {