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2024-11-25runtime: using ABIInternal on syscall for riscv64Meng Zhuo
Change-Id: I550e6b9682df3a3ef75fba6da95c92a30da7bb22 Reviewed-on: https://go-review.googlesource.com/c/go/+/620755 Reviewed-by: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-11-09all: clean up addition of constants in riscv64 assemblyJoel Sing
Use ADD with constants, instead of ADDI. Also use SUB with a positive constant rather than ADD with a negative constant. The resulting assembly is still the same. Change-Id: Ife10bf5ae4122e525f0e7d41b5e463e748236a9c Reviewed-on: https://go-review.googlesource.com/c/go/+/540136 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: M Zhuo <mzh@golangcn.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Mark Ryan <markdryan@rivosinc.com> Reviewed-by: Heschi Kreinick <heschi@google.com> Run-TryBot: Joel Sing <joel@sing.id.au>
2022-10-18runtime: always keep global reference to mp until mexit completesMichael Pratt
Ms are allocated via standard heap allocation (`new(m)`), which means we must keep them alive (i.e., reachable by the GC) until we are completely done using them. Ms are primarily reachable through runtime.allm. However, runtime.mexit drops the M from allm fairly early, long before it is done using the M structure. If that was the last reference to the M, it is now at risk of being freed by the GC and used for some other allocation, leading to memory corruption. Ms with a Go-allocated stack coincidentally already keep a reference to the M in sched.freem, so that the stack can be freed lazily. This reference has the side effect of keeping this Ms reachable. However, Ms with an OS stack skip this and are at risk of corruption. Fix this lifetime by extending sched.freem use to all Ms, with the value of mp.freeWait determining whether the stack needs to be freed or not. Fixes #56243. Change-Id: Ic0c01684775f5646970df507111c9abaac0ba52e Reviewed-on: https://go-review.googlesource.com/c/go/+/443716 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
2022-10-07runtime: move epoll syscalls to runtime/internal/syscallAndrew Pogrebnoy
This change moves Linux epoll's syscalls implementation to the "runtime/internal/syscall" package. The intention in this CL was to minimise behavioural changes but make the code more generalised. This also will allow adding new syscalls (like epoll_pwait2) without the need to implement assembly stubs for each arch. It also drops epoll_create as not all architectures provide this call. epoll_create1 was added to the kernel in version 2.6.27 and Go requires Linux kernel version 2.6.32 or later since Go 1.18. So it is safe to always use epoll_create1. This is a resubmit as the previous CL 421994 was reverted due to test failures after the merge with the master. The issue was fixed in CL 438615 For #53824 For #51087 Change-Id: I1bd0f23a85b4f9b80178c5dd36fd3e95ff4f9648 Reviewed-on: https://go-review.googlesource.com/c/go/+/440115 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Pratt <mpratt@google.com> Run-TryBot: Michael Pratt <mpratt@google.com>
2022-09-30Revert "runtime: move epoll syscalls to runtime/internal/syscall"Michael Pratt
This reverts CL 421994. Reason for revert: breaks runtime.TestCheckPtr2 For #53824 For #51087 Change-Id: I044ea4d6efdffe0a4b7fb0d2bb3717d9f391fc59 Reviewed-on: https://go-review.googlesource.com/c/go/+/437295 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Michael Pratt <mpratt@google.com> Auto-Submit: Michael Pratt <mpratt@google.com> Reviewed-by: Bryan Mills <bcmills@google.com>
2022-09-30runtime: move epoll syscalls to runtime/internal/syscallAndrew Pogrebnoy
This change moves Linux epoll's syscalls implementation to the "runtime/internal/syscall" package. The intention in this CL was to minimise behavioural changes but make the code more generalised. This also will allow adding new syscalls (like epoll_pwait2) without the need to implement assembly stubs for each arch. It also drops epoll_create as not all architectures provide this call. epoll_create1 was added to the kernel in version 2.6.27 and Go requires Linux kernel version 2.6.32 or later since Go 1.18. So it is safe to always use epoll_create1. For #53824 For #51087 Change-Id: I9a6a26b7f2075a38e041de1bab4691da0ecb94fc Reviewed-on: https://go-review.googlesource.com/c/go/+/421994 Reviewed-by: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Run-TryBot: Michael Pratt <mpratt@google.com> Auto-Submit: Michael Pratt <mpratt@google.com>
2022-04-28runtime: mark sigtramp as TOPFRAMEMichael Pratt
Currently throw() in the signal handler results in "fatal error: unknown return pc from runtime.sigreturn ...". Marking sigtramp as TOPFRAME allows gentraceback to stop tracebacks at the end of a signal handler, since there is not much beyond sigtramp. This is just done on Linux for now, but may apply to other Unix systems as well. Change-Id: I96edcb945283f417a5bfe00ce2fb2b1a0d578692 Reviewed-on: https://go-review.googlesource.com/c/go/+/402190 Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Michael Pratt <mpratt@google.com> Auto-Submit: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
2022-03-03runtime: remove fallback to pipe on platforms with pipe2Tobias Klauser
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>
2021-09-27runtime: add timer_create syscalls for LinuxRhys Hiltner
Updates #35057 Change-Id: Id702b502fa4e4005ba1e450a945bc4420a8a8b8c Reviewed-on: https://go-review.googlesource.com/c/go/+/342052 Run-TryBot: Rhys Hiltner <rhys@justin.tv> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Michael Pratt <mpratt@google.com> Trust: Than McIntosh <thanm@google.com>
2021-09-02runtime: use vDSO clock_gettime on linux/riscv64Meng Zhuo
Speed up nanotime1 and walltime on riscv64 with vDSO, just like the other vDSO-enabled targets. name old time/op new time/op delta Now 1.53µs ± 1% 1.05µs ± 3% -31.74% (p=0.000 n=10+10) NowUnixNano 1.54µs ± 0% 1.05µs ± 2% -31.91% (p=0.000 n=9+10) NowUnixMilli 1.56µs ± 1% 1.06µs ± 1% -31.73% (p=0.000 n=10+10) NowUnixMicro 1.56µs ± 1% 1.05µs ± 1% -32.80% (p=0.000 n=9+10) Change-Id: I69b3fe3cc57685a826c53b366c0992e8048399bb Reviewed-on: https://go-review.googlesource.com/c/go/+/328509 Trust: Meng Zhuo <mzh@golangcn.org> Run-TryBot: Meng Zhuo <mzh@golangcn.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-08-16runtime: remove unused getrlimit on linux/riscv64Tobias Klauser
Follow CL 94775 and CL 93655 which removed the (commented-out) usage of this function on other platforms. Change-Id: I28e0569d8531d0c09f3caefa7c4eb54fb5bd8a33 Reviewed-on: https://go-review.googlesource.com/c/go/+/334429 Trust: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-04-29runtime: rename walltime1 to walltimeIan Lance Taylor
Change-Id: Iec9de5ca56eb68d524bbaa0668515dbd09ad38a1 Reviewed-on: https://go-review.googlesource.com/c/go/+/314770 Trust: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-03-15cmd/internal/obj/riscv: add FENCE instructionJoel Sing
Also remove #define's that were previously in use. Updates #36765 Change-Id: I90b6a8629c78f549012f3f6c5f3b325336182712 Reviewed-on: https://go-review.googlesource.com/c/go/+/220539 Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-01-19runtime: add support for linux/riscv64Joel Sing
Based on riscv-go port. Updates #27532 Change-Id: If522807a382130be3c8d40f4b4c1131d1de7c9e3 Reviewed-on: https://go-review.googlesource.com/c/go/+/204632 Run-TryBot: Joel Sing <joel@sing.id.au> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
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