From 1c22fdf36037e9c65bad38ee36d346fe7691283b Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 2 May 2018 10:59:09 -0400
Subject: libuv: linux/sparc64: use fcntl to set and clear O_NONBLOCK
Upstream libuv commits:
* node-v0.6.0~28 (linux: use ioctl(FIONBIO) to set O_NONBLOCK, saves a syscall, 2011-10-29)
* v1.11.0~11 (unix: use async-signal safe functions between fork and exec, 2016-12-12)
left an asymmetry in the way O_NONBLOCK is set and cleared. Normally
ioctl/FIONBIO is used for both. However, uv_spawn uses fcntl/O_NONBLOCK
to clear O_NONBLOCK between fork and exec. This fails on Linux/sparc64
where setting via ioctl/FIONBIO actually sets two bits (in O_NDELAY)
that cause clearing via fcntl/O_NONBLOCK to be silently ignored (though
clearing via ioctl/FIONBIO or fcntl/O_NDELAY works).
Since CMake commit v3.11.0-rc1~117^2 (CTest: Re-implement test process
handling using libuv, 2017-12-10), CTest uses libuv. On Linux/sparc64
child processes have been started with non-blocking output pipes. This
can lead to write errors or lost output from children not prepared to
deal with `EAGAIN` on stdout or stderr.
Fix this for now by switching libuv back to fcntl/O_NONBLOCK to set and
clear O_NONBLOCK when compiled on Linux/sparc64.
LibUV-Issue: 1830
Fixes: #17941
---
Utilities/cmlibuv/src/unix/internal.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Utilities/cmlibuv/src/unix/internal.h b/Utilities/cmlibuv/src/unix/internal.h
index 9cc87f0..668e576 100644
--- a/Utilities/cmlibuv/src/unix/internal.h
+++ b/Utilities/cmlibuv/src/unix/internal.h
@@ -184,7 +184,7 @@ struct uv__stream_queued_fds_s {
defined(__DragonFly__) || \
defined(__FreeBSD__) || \
defined(__FreeBSD_kernel__) || \
- defined(__linux__) || \
+ (defined(__linux__) && !defined(__sparc__)) || \
defined(__OpenBSD__) || \
defined(__NetBSD__)
#define uv__cloexec uv__cloexec_ioctl
--
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