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| author | Tobias Klauser <tklauser@distanz.ch> | 2022-03-03 10:19:07 +0100 |
|---|---|---|
| committer | Tobias Klauser <tobias.klauser@gmail.com> | 2022-03-03 20:47:17 +0000 |
| commit | 9d34fc5108d91bfcce3c465069dbb2c563af4229 (patch) | |
| tree | 266610efcdc56e77e06bc02888a2452487e4f45f /src/runtime/sys_linux_amd64.s | |
| parent | 58804ea67a28c1d8e37ed548b685bc0c09638886 (diff) | |
| download | go-9d34fc5108d91bfcce3c465069dbb2c563af4229.tar.xz | |
runtime: remove fallback to pipe on platforms with pipe2
On Linux, the minimum required kernel version for Go 1.18 was be changed
to 2.6.32, see #45964. The pipe2 syscall was added in 2.6.27.
All other platforms already provide the pipe2 syscall in the minimum
supported version:
- DragonFly BSD added it in version 4.2, see
https://www.dragonflybsd.org/release42/
- FreeBSD added it in version 10.0, see
https://www.freebsd.org/cgi/man.cgi?pipe(2)#end
- NetBSD added it in version 6.0, see
https://man.netbsd.org/pipe2.2#HISTORY
- OpenBSD added it in version 5.7, see
https://man.openbsd.org/pipe.2#HISTORY
- Illumos supports it since 2013, see
https://www.illumos.org/issues/3714
- Solaris supports it since 11.4
This also allows to remove setNonblock which was only used in the pipe
fallback path on these platforms.
Change-Id: I1f40d32fd3065d74e22af77b9ff2292b9cf66706
Reviewed-on: https://go-review.googlesource.com/c/go/+/389354
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/sys_linux_amd64.s')
| -rw-r--r-- | src/runtime/sys_linux_amd64.s | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s index f0e58e11db..4be0801114 100644 --- a/src/runtime/sys_linux_amd64.s +++ b/src/runtime/sys_linux_amd64.s @@ -22,7 +22,6 @@ #define SYS_rt_sigaction 13 #define SYS_rt_sigprocmask 14 #define SYS_rt_sigreturn 15 -#define SYS_pipe 22 #define SYS_sched_yield 24 #define SYS_mincore 27 #define SYS_madvise 28 @@ -114,14 +113,6 @@ TEXT runtime·read(SB),NOSPLIT,$0-28 MOVL AX, ret+24(FP) RET -// func pipe() (r, w int32, errno int32) -TEXT runtime·pipe(SB),NOSPLIT,$0-12 - LEAQ r+0(FP), DI - MOVL $SYS_pipe, AX - SYSCALL - MOVL AX, errno+8(FP) - RET - // func pipe2(flags int32) (r, w int32, errno int32) TEXT runtime·pipe2(SB),NOSPLIT,$0-20 LEAQ r+8(FP), DI @@ -708,21 +699,6 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0 SYSCALL RET -// func runtime·setNonblock(int32 fd) -TEXT runtime·setNonblock(SB),NOSPLIT,$0-4 - MOVL fd+0(FP), DI // fd - MOVQ $3, SI // F_GETFL - MOVQ $0, DX - MOVL $SYS_fcntl, AX - SYSCALL - MOVL fd+0(FP), DI // fd - MOVQ $4, SI // F_SETFL - MOVQ $0x800, DX // O_NONBLOCK - ORL AX, DX - MOVL $SYS_fcntl, AX - SYSCALL - RET - // int access(const char *name, int mode) TEXT runtime·access(SB),NOSPLIT,$0 // This uses faccessat instead of access, because Android O blocks access. |