Update the comments about the list of Unix systems after CL 601357,
which moved one copy and eliminated another.
Change-Id: I12f5b14a53ce6f8b3a41c9a10f947465c291e2b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/623035
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Add support for assembling the FMA instructions present in the LoongArch
base ISA v1.00. This requires adding a new instruction format and making
use of a third source operand, which is put in RestArgs[0].
The single-precision instructions have the `.s` prefix in their official
mnemonics, and similar Go asm instructions all have `S` prefix for the
other architectures having FMA support, but in this change they instead
have `F` prefix in Go asm because loong64 currently follows the mips
backends in the naming convention. This could be changed later because
FMA is fully expressible in pure Go, making it unlikely to have to hand-
write such assembly in the wild.
Example mapping between actual encoding and Go asm syntax:
fmadd.s fd, fj, fk, fa -> FMADDF fa, fk, fj, fd
(prog.From = fa, prog.Reg = fk, prog.RestArgs[0] = fj and prog.To = fd)
fmadd.s fd, fd, fk, fa -> FMADDF fa, fk, fd
(prog.From = fa, prog.Reg = fk and prog.To = fd)
This patch is a copy of CL 477716.
Co-authored-by: WANG Xuerui <git@xen0n.name>
Change-Id: I9b4e4c601d6c5a854ee238f085849666e4faf090
Reviewed-on: https://go-review.googlesource.com/c/go/+/623877
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Fixes#70023
Change-Id: Ibac9c242f52a605e5fc307bdcaedb359bc2b1de9
Reviewed-on: https://go-review.googlesource.com/c/go/+/622238
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Change-Id: Ia4fbb436ca573b1820f2b4d06d2332f588334768
Reviewed-on: https://go-review.googlesource.com/c/go/+/624357
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Commands run (in both src and src/cmd):
go get golang.org/x/text@v0.19.0
go mod tidy
go mod vendor
This is in preparation for vendoring an updated x/tools it has a
requirement on x/text v0.19.0.
Change-Id: Ia61f668ce802a039d441eff1c3a105653edcc9cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/623856
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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Seems simple, but putting the return after fatal ensures that at the
point of the small group loop, no call has happened so the key is
still in a register. This ensures that we don't have to restore the
key from the stack before the comparison on each iteration. That gets
rid of a load from the inner loop.
name old time/op new time/op delta
MapAccessHit/Key=int64/Elem=int64/len=6-8 4.01ns ± 6% 3.85ns ± 3% -3.92% (p=0.001 n=10+10)
Change-Id: Ia23ac48e6c5522be88f7d9be0ff3489b2dfc52fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/624255
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Use matchEmptyOrDeleted instead of matchEmpty.
Streamline the code a bit.
TODO: replicate in all the _fast files.
Change-Id: I4df16a13a19df3aaae0c42e0c12f20552f08ead6
Reviewed-on: https://go-review.googlesource.com/c/go/+/624055
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It's a bit more efficient.
Change-Id: If813a597516c41fdac6f60e586641d0ee1cde025
Reviewed-on: https://go-review.googlesource.com/c/go/+/623818
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I don't think we have any code that uses this function.
Unless it is something for the future.
Change-Id: I7e44634f7a9c1d4d64d84c358447ccf213668d92
Reviewed-on: https://go-review.googlesource.com/c/go/+/622077
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Ever since we had to upgrade from our COS image, we've been experiencing
TSAN test failures. My best guess is that the ASLR randomization entropy
increased, causing TSAN to fail. TSAN already re-execs itself in Clang
18+ with ASLR disabled, so just execute the tests with ASLR disabled on
Linux.
Fixes#59418.
Change-Id: Icb4536ddf0f2f5e7850734564d40f5a208ab8d01
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This patch is a copy of CL 478595.
Co-authored-by: WANG Xuerui <git@xen0n.name>
Change-Id: Ifb6e8183c83a5dfe5dec84e173a74d5de62692a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/623875
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All remaining unary bitop instructions in the LoongArch v1.00 base ISA
are added with this change.
While at it, add the missing W suffix to the current CLO/CLZ names. They
are not used anywhere as far as we know, so no breakage is expected.
Also, stop reusing SLL's instruction format for simplicity, in favor of
a new but trivial instruction format case.
This patch is a copy of CL 477717.
Co-authored-by: WANG Xuerui <git@xen0n.name>
Change-Id: Idbcaca25dda1ed313674ef8b26da722e8d7151c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/623876
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We've already use size==0 to indicate sending until EOF for
poll.SendFile on non-Linux platforms: Windows/*BSD/macOS/Solaris.
Let's harmonize Linux with others, making poll.SendFile on Linux
match its comment.
Change-Id: Ibfe9c9aa8f16bc37812afce9f95995c715cce0bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/623057
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*BSD can also returns (>0, EAGAIN) with non-blocking socket,
it's therefore not macOS-specific.
Change-Id: I57a393da31fab7788ad5779a038396be8236b0f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/623056
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The function crypto/rand.read allocates on Plan 9, so this test
would always fail.
Fixes#69873
Change-Id: I8d661cb868c32f6985d0926f9ae7b30204cafbf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/624015
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
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When the SHA3 code was imported from x/crypto we determined the
keccackKats.json.deflate testcases were redundant with existing test
coverage and ACVP. While the testcases referencing the data were
already removed, we forgot to remove the data itself prior to this
commit.
Change-Id: Id2da9201653ff93e618e905bef53f57cf450b5b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/623655
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This tests fails sporadically on the aix-ppc64 CI. I suspect this is
an aix performance related issue. Skip the test.
AIX seems slow to perform a non-blocking reading on a pipe, and this
results in too many threads being created. This happens as far back
as go1.22, where I stopped looking.
On the GCC farm machine gcc119, The failure rate seemed coupled to
GOMAXPROCS; about 1% for <=8, up to 40%+ for >=30 for all releases
tested.
For #70131
Change-Id: If002b55e5a4586d10cc7876d7c25259e61b17163
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For #70130
Change-Id: Idd7ca3d11b78887709b83dd5c868de9cc506ecff
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Commands run (in both src and src/cmd):
go get golang.org/x/sys@v0.26.0
go mod tidy
go mod vendor
This is in preparation for vendoring an updated x/tools it has a
requirement on x/sys v0.26.0.
Change-Id: I122bb3a3bc97610ba71c52263b99c56e3354b59d
Reviewed-on: https://go-review.googlesource.com/c/go/+/623855
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Reviewed-by: Carlos Amedee <carlos@golang.org>
On some Windows systems the SOFTWARE\Microsoft\OneDrive registry key is REG_SZ rather than REG_EXPAND_SZ.
Change-Id: I3ccb8771377a73456f48da1b5cfae668130b3f7b
Reviewed-on: https://go-review.googlesource.com/c/go/+/623515
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For #54766.
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This gives us a place to clarify what the problem is
and how people should fix it.
For #65656Fixes#70093
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In CL 622075, I introduced code that violated unsafe.Pointer rules
by casting to uintptr and back across statements. This change corrects it.
Change-Id: Ib6f6c08d9ce33aaeaf41f390c7e9f13a7b8cb974
GitHub-Last-Rev: 01cc68a87c
GitHub-Pull-Request: golang/go#70129
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Avoid integer overflow when passing a number of bytes to sendfile.
Also, Solaris might not support passing a 0 length to read to
the end of a file, but it does support passing a very large length.
So just do that instead of looking up the source file size.
Change-Id: Ibf750892938d9e2bafb1256c6e380c88899495f4
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Also check for GOOS=illumos as well as GOOS=solaris.
Change-Id: I887e6cddc1b8ad0f4624c9491e089c6bb8bce70e
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Currently, at a cgo callback where there is already a Go frame on
the stack (i.e. C->Go->C->Go), we require that at the inner Go
callback the SP is within the g0's stack bounds set by a previous
callback. This is to prevent that the C code switches stack while
having a Go frame on the stack, which we don't really support. But
this could also happen when we cannot get accurate stack bounds,
e.g. when pthread_getattr_np is not available. Since the stack
bounds are just estimates based on the current SP, if there are
multiple C->Go callbacks with various stack depth, it is possible
that the SP of a later callback falls out of a previous call's
estimate. This leads to runtime throw in a seemingly reasonable
program.
This CL changes it to save the old g0 stack bounds at cgocallback,
update the bounds, and restore the old bounds at return. So each
callback will get its own stack bounds based on the current SP,
and when it returns, the outer callback has the its old stack
bounds restored.
Also, at a cgo callback when there is no Go frame on the stack,
we currently always get new stack bounds. We do this because if
we can only get estimated bounds based on the SP, and the stack
depth varies a lot between two C->Go calls, the previous
estimates may be off and we fall out or nearly fall out of the
previous bounds. But this causes a performance problem: the
pthread API to get accurate stack bounds (pthread_getattr_np) is
very slow when called on the main thread. Getting the stack bounds
every time significantly slows down repeated C->Go calls on the
main thread.
This CL fixes it by "caching" the stack bounds if they are
accurate. I.e. at the second time Go calls into C, if the previous
stack bounds are accurate, and the current SP is in bounds, we can
be sure it is the same stack and we don't need to update the bounds.
This avoids the repeated calls to pthread_getattr_np. If we cannot
get the accurate bounds, we continue to update the stack bounds
based on the SP, and that operation is very cheap.
On a Linux/AMD64 machine with glibc:
name old time/op new time/op delta
CgoCallbackMainThread-8 96.4µs ± 3% 0.1µs ± 2% -99.92% (p=0.000 n=10+9)
Fixes#68285.
Fixes#68587.
Change-Id: I3422badd5ad8ff63e1a733152d05fb7a44d5d435
Reviewed-on: https://go-review.googlesource.com/c/go/+/600296
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This is the only non-vendored file that imports x/sys/unix.
Switch to fetching the information in this package.
Change-Id: I4e54c2cd8b4953066e2bee42922f35c387fb43e9
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The compiler will stack allocate the Map struct and initial group if
possible.
Stack maps are initialized inline without calling into the runtime.
Small heap allocated maps use makemap_small.
These are the same heuristics as existing maps.
For #54766.
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A previous CL kept it across loop iterations, but those are more rare
than call iterations.
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Speeds up iteration by about 3%.
For #54766.
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Load the field we need from the type once outside the search loop.
Get rid of the multiply to compute the slot position. Instead compute
the slot position incrementally using addition.
Move the hashing later in access2.
Based on khr@'s CL 618959.
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This avoids some zero-extension ops on 64-bit machines.
Based on khr@'s CL 619479.
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Keep only a single seed; initialize it; and reset it when the map is
empty.
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Add all the specialized variants that exist for the existing maps.
Like the existing maps, the fast variants do not support indirect
key/elem.
Note that as of this CL, the Get and Put methods on Map/table are
effectively dead. They are only reachable from the internal/runtime/maps
unit tests.
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We use the same heuristics as existing maps.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: I44bb51483cae2c1714717f1b501850fb9e55a39a
Reviewed-on: https://go-review.googlesource.com/c/go/+/616461
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This is the same design as existing maps.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: I5f6ef5fea1e0f0616bcd90eaae7faee4cdac58c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/616460
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@google.com>
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: Iebc7f5482299cb7c4ecccc4c2eb46b4bc42c5fc3
Reviewed-on: https://go-review.googlesource.com/c/go/+/616459
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Rather than importing runtime directly, linkname the functions from
runtime. This allows importing internal/race from internal/runtime/*
packages, similar to internal/asan and internal/msan.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: Ibd9644557782076e3cee7927c8a6e6d2909f0a6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/616458
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
When given a hint size, set the initial capacity large enough to avoid
requiring growth in the average case.
When not given a hint (or given 0), don't allocate anything at all.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: I8844fc652b8d2d4e5136cd56f7e78999a07fe381
Reviewed-on: https://go-review.googlesource.com/c/go/+/616457
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
Regenerate RISC-V instruction table from the riscv-opcodes repository,
due to various changes and shuffling upstream.
This has been changed to remove pseudo-instructions, since Go only
needs the instruction encodings and including the pseudo-instructions
is creating unnecessary complications (for example, the inclusion
of ANOP and ARET, as well as strangely named aliases such as
AJALPSEUDO/AJALRPSEUDO). Remove pseudo-instructions that are not
currently supported by the assembler and add specific handling for
RDCYCLE, RDTIME and RDINSTRET, which were previously implemented
via the instruction encodings.
Change-Id: I78be4506ba6b627eba1f321406081a63bab5b2e6
Cq-Include-Trybots: luci.golang.try:gotip-linux-riscv64
Reviewed-on: https://go-review.googlesource.com/c/go/+/616116
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
On a whim I decided to investigate the possibility of whether the
flakiness on the asan builder was due to a concurrently executing test.
Of the most recent failures there were a few candidates, and this test
was one of them. After disabling each candidate one by one, we had a
winner: this test causes other concurrently executing tests, running
pure Go code, to spuriously fail.
I do not know why yet, but this test doesn't seem like it would have
incredibly high value for ASAN, and does funky things like MAP_FIXED in
recently unmapped regions, so I think it's fine.
For #70054.
For #64257.
Change-Id: Ib9a84d9b69812e76c390d99b00698710ee1ece1a
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-asan-clang15
Reviewed-on: https://go-review.googlesource.com/c/go/+/623336
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This enables manual inlining Map.Get/table.getWithoutKey to create a
simple fast path with no calls.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: Ic208dd4c02c7554f312b85b5fadccaf82b23545c
Reviewed-on: https://go-review.googlesource.com/c/go/+/616455
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
