From 5d411fd147d652e9d7bb259f4048693c6e4742aa Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Mon, 9 Mar 2020 16:30:19 -0700
Subject: [PATCH] memcheck/tests: Fix timerfd syscall test

modern libc provides these functions, moreover this also ensures that we
are 64bit time_t safe. Fallback to existing definitions if libc does not
have the implementation or syscall is not defined

Upstream-Status: Submitted [https://sourceforge.net/p/valgrind/mailman/message/36943897/]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 config.h.in                            |  9 +++++++++
 configure.ac                           |  3 +++
 memcheck/tests/linux/timerfd-syscall.c | 10 ++++++++--
 5 files changed, 32 insertions(+), 2 deletions(-)

--- a/config.h.in
+++ b/config.h.in
@@ -301,6 +301,9 @@
 /* Define to 1 if you have the <sys/sysnvl.h> header file. */
 #undef HAVE_SYS_SYSNVL_H
 
+/* Define to 1 if you have the <sys/timerfd.h> header file. */
+#undef HAVE_SYS_TIMERFD_H
+
 /* Define to 1 if you have the <sys/time.h> header file. */
 #undef HAVE_SYS_TIME_H
 
--- a/configure.ac
+++ b/configure.ac
@@ -4098,6 +4098,7 @@ AC_CHECK_HEADERS([       \
         sys/syscall.h    \
         sys/sysnvl.h     \
         sys/time.h       \
+        sys/timerfd.h    \
         sys/types.h      \
         ])
 
--- a/memcheck/tests/linux/timerfd-syscall.c
+++ b/memcheck/tests/linux/timerfd-syscall.c
@@ -45,6 +45,9 @@
 #if defined(HAVE_SYS_TIME_H)
 #include <sys/time.h>
 #endif
+#if defined(HAVE_SYS_TIMERFD_H)
+#include <sys/timerfd.h>
+#endif
 #if defined(HAVE_SYS_TYPES_H)
 #include <sys/types.h>
 #endif
@@ -54,7 +57,8 @@
  * timerfd_* system call numbers introduced in 2.6.23. These constants are
  * not yet in the glibc 2.7 headers, that is why they are defined here.
  */
-#ifndef __NR_timerfd_create
+#if !defined(HAVE_SYS_TIMERFD_H)
+#if !defined(__NR_timerfd_create)
 #if defined(__x86_64__)
 #define __NR_timerfd_create  283
 #elif defined(__i386__)
@@ -67,8 +71,10 @@
 #error Cannot detect your architecture!
 #endif
 #endif
+#endif
 
-#ifndef __NR_timerfd_settime
+#if !defined(HAVE_SYS_TIMERFD_H)
+#if !defined(__NR_timerfd_settime)
 #if defined(__x86_64__)
 #define __NR_timerfd_settime 286
 #define __NR_timerfd_gettime 287
@@ -85,7 +91,7 @@
 #error Cannot detect your architecture!
 #endif
 #endif
-
+#endif
 
 
 /* Definitions from include/linux/timerfd.h */
@@ -127,6 +133,7 @@ void set_timespec(struct timespec *tmr,
   tmr->tv_nsec = (long) (1000ULL * (ustime % 1000000ULL));
 }
 
+#if !defined(HAVE_SYS_TIMERFD_H)
 int timerfd_create(int clockid, int flags)
 {
   return syscall(__NR_timerfd_create, clockid, flags);
@@ -142,6 +149,7 @@ int timerfd_gettime(int ufc, struct itim
 {
   return syscall(__NR_timerfd_gettime, ufc, otmr);
 }
+#endif
 
 long waittmr(int tfd, int timeo)
 {
