From 348a48c80275445af03c893a955f29c3db0eb62d Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Mon, 10 Jun 2024 11:10:13 +0200
Subject: executor: use close_range if available

Close_range is faster.
---
 executor/common_linux.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'executor/common_linux.h')

diff --git a/executor/common_linux.h b/executor/common_linux.h
index 6b1826c65..f7f64a5c6 100644
--- a/executor/common_linux.h
+++ b/executor/common_linux.h
@@ -4818,12 +4818,17 @@ static void setup_test()
 #endif
 
 #if SYZ_EXECUTOR || SYZ_CLOSE_FDS
+#include <sys/syscall.h>
 #define SYZ_HAVE_CLOSE_FDS 1
 static void close_fds()
 {
 #if SYZ_EXECUTOR
 	if (!flag_close_fds)
 		return;
+#endif
+#ifdef SYS_close_range
+	if (!syscall(SYS_close_range, 3, MAX_FDS, 0))
+		return;
 #endif
 	// Keeping a 9p transport pipe open will hang the proccess dead,
 	// so close all opened file descriptors.
-- 
cgit mrf-deployment