go/build should use the ctxt routines, not os directly.
These snuck in.
Change-Id: I918d4de923eb485bfd524e4f1b1310a7a165ad03
Reviewed-on: https://go-review.googlesource.com/c/go/+/266357
Trust: Russ Cox <rsc@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
These messages can happen if there are
duplicate body-less function declarations.
Using panic gives the panic handler
a chance to handle the panic by printing the
queued error messages instead of an internal error.
And if there are no queued error messages,
using panic pinpoints the stack trace leading
to the incorrect use of NewFuncInfo/NewFileInfo.
Change-Id: I7e7ea9822ff9a1e7140f5e5b7cfd6437ff9318a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/266338
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
We should still be able to devirtualize here, but I need to understand
the AST better. While I'm doing that, at least switch to a graceful
failure case (i.e., skip the optimization and print a warning message)
to fix the x/text builders.
Updates #42279.
Change-Id: Ie2b0b701fccf590d0cabfead703fc2fa999072cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/266359
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
After inlining, add a pass that looks for interface calls where we can
statically determine the interface value's concrete type. If such a
case is found, insert an explicit type assertion to the concrete type
so that escape analysis can see it.
Fixes#33160.
Change-Id: I36932c691693f0069e34384086d63133e249b06b
Reviewed-on: https://go-review.googlesource.com/c/go/+/264837
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: David Chase <drchase@google.com>
When inlining a function call "f()", if "f" contains exactly 1
"return" statement and doesn't name its result parameters, it's
inlined to declare+initialize the result value using the AST
representation that's compatible with staticValue.
Also, extend staticValue to skip over OCONVNOP nodes (often introduced
by inlining), and fix various bits of code related to handling method
expressions.
Updates #33160.
Change-Id: If8652e319f0a5700cf9d40a7a62e369a2a359229
Reviewed-on: https://go-review.googlesource.com/c/go/+/266199
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Update #36641
Change-Id: I8618da30d8940a56d6cc86a37a2f54b31ee029e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/263601
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Go Bot <gobot@golang.org>
This reverts CL 263457.
It turns out that this still missed changes to cmd/link/internal/ld/config.go
and some of these build modes also fail once cgo is enabled. Disable again for
now.
Change-Id: Iaf40d44e1551afd5b040d357f04af134f55a64a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/266317
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Joel Sing <joel@sing.id.au>
This change fixes two failng tests on linux-ppc64x:
- TestAllThreadsSyscall() exposed a real bug in the ppc64x support:
- It turns out that the r2 syscall return value is not defined
on all architectures. Notably linux-ppc64x so address that by
introducing a private architectural constant in the syscall
package, archHonorsR2: true if r2 has a determanistic value.
- TestSetuidEtc() was sensitive to /proc/<PID>/status content:
- The amount of padding space has changed with kernel vintage.
- Stress testing revealed a race with /proc files disappearing.
Fixes#42178
Change-Id: Ie6fc0b8f2f94a409ac0e5756e73bfce113274709
Reviewed-on: https://go-review.googlesource.com/c/go/+/266202
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
The inlining pass previously bailed upon encountering a go or defer statement, so it would not inline functions e.g. used to provide arguments to the deferred function. This change preserves the behavior of not inlining the
deferred function itself, but it allows the inlining walk to proceed into its arguments.
Fixes#42194
Change-Id: I4e82029d8dcbe69019cc83ae63a4b29af45ec777
Reviewed-on: https://go-review.googlesource.com/c/go/+/264997
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
The final piece of //go:embed support: have the go command stitch
together parsing in go/build, low-level data initialization in cmd/compile,
and the new data structures in package embed, to make the //go:embed
feature actually function.
And test, now that all the pieces are available to work together.
For #41191.
(Issue not fixed: still need to add a tool for use by Bazel.)
Change-Id: Ib1d198345c3b4d557d340f292eda13b984b65d65
Reviewed-on: https://go-review.googlesource.com/c/go/+/243945
Trust: Russ Cox <rsc@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Trust: Johan Brandhorst <johan.brandhorst@gmail.com>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Johan Brandhorst <johan.brandhorst@gmail.com>
This reverts commit 50af50d136.
Reason for revert: Causes failures in the runtime package test on Darwin, apparently.
Change-Id: I006bc1b3443fa7207e92fb4a93e3fb438d4d3de3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266257
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
This fixes a case missed in CL 258220.
For #36460
Updates #26241
Updates #37438
Change-Id: I5e8c2ee1e08e41cc2eb34e54c617cb5e4bf69c5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/266018
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
This reverts CL 250497. It also moves all blank identifier imports below the rest of the imports for clarity.
Reason for revert: The blank identifier import was intentional to show that it's needed for its registration side effect. The duplicate import should stay since it communicates that the side-effect is important to tools and to future developers updating this file.
Change-Id: I626e6329db50f47453aa71085a05d21bf6efe0ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/265078
Run-TryBot: Katie Hockman <katie@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Change the definitions of selected runtime assembly routines
from ABI0 (the default) to ABIInternal. The ABIInternal def is
intended to indicate that these functions don't follow the existing Go
runtime ABI. In addition, convert the assembly reference to
runtime.main (from runtime.mainPC) to ABIInternal. Finally, for
functions such as "runtime.duffzero" that are called directly from
generated code, make sure that the compiler looks up the correct
ABI version.
This is intended to support the register abi work, however these
changes should not have any issues even when GOEXPERIMENT=regabi is
not in effect.
Updates #27539, #40724.
Change-Id: I9846f8dcaccc95718cf2e61a18b7e924a0677e4c
Reviewed-on: https://go-review.googlesource.com/c/go/+/262319
Run-TryBot: Than McIntosh <thanm@google.com>
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Trust: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Rulegen was not run again between patchsets 2 and 3 of CL 264683, so
the rewritegeneric.go file is out of sync. Run rulegen.
Change-Id: I67d8d267c4f666943ed9bf8c33aac2ac6013336a
Reviewed-on: https://go-review.googlesource.com/c/go/+/266080
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rémy Oudompheng <remyoudompheng@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Ignore an additional class of errors form fallocate, falling back to
heap allocated buffers for output.
Fixes#41356
Change-Id: Iaaa91620cec644c78978e0b258f166bc204a3f85
Reviewed-on: https://go-review.googlesource.com/c/go/+/254777
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
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Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Update #40995
Change-Id: Ie028dfd87ef8731804567a0501f1f7758e8dd203
Reviewed-on: https://go-review.googlesource.com/c/go/+/250580
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
The X27 register (known as S11 via its ABI name) is the g register on riscv64.
Prevent assembly from referring to it by either of these names.
Change-Id: Iba389eb8e44e097c0142c5b3d92e72bcae8a244a
Reviewed-on: https://go-review.googlesource.com/c/go/+/265519
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Avoid saving unnecessary registers in gcWriteBarrier on riscv64, which also
removes references to X4 and X27 (TP and g registers).
Change-Id: I2854161dcdf0c6047a45347165371827dcf8c1cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/265518
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This patch adds support for CASx and CASPx atomic instructions.
go syntax gnu syntax
CASD Rs, (Rn|RSP), Rt => cas Xs, Xt, (Xn|SP)
CASALW Rs, (Rn|RSP), Rt => casal Ws, Wt, (Xn|SP)
CASPD (Rs, Rs+1), (Rn|RSP), (Rt, Rt+1) => casp Xs, Xs+1, Xt, Xt+1, (Xn|SP)
CASPW (Rs, Rs+1), (Rn|RSP), (Rt, Rt+1) => casp Ws, Ws+1, Wt, Wt+1, (Xn|SP)
This patch changes the type of prog.RestArgs from "[]Addr" to
"[]struct{Addr, Pos}", Pos is a enum, indicating the position of
the operand.
This patch also adds test cases.
Change-Id: Ib971cfda7890b7aa895d17bab22dea326c7fcaa4
Reviewed-on: https://go-review.googlesource.com/c/go/+/233277
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This patch sorts the test cases in the arm64.s file by instruction
category and deletes comments related to the old parser.
Change-Id: I9bbf56281e247a4fd8d5e670e8ad67c923aef1ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/263458
Trust: fannie zhang <Fannie.Zhang@arm.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This patch enables VSLI, VUADDW(2), VUSRA and FMOVQ SIMD instructions
required by the issue #40725. And the GNU syntax of 'FMOVQ' is 128-bit
ldr/str(immediate, simd&fp).
Add test cases.
Fixes#40725
Change-Id: Ide968ef4a9385ce4cd8f69bce854289014d30456
Reviewed-on: https://go-review.googlesource.com/c/go/+/258397
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
As it says, delay expanpsion of OpArg to the expand_calls phase,
to enable (eventually) interprocedural SSA optimizations, and
(sooner) change to a register ABI.
Includes a round of cleanup to function names and comments,
largely to match the expanded scope of the functions.
This CL removes the per-function dependence on GOSSAHASH,
but the go116lateCallExpansion kill switch remains (and was
tested locally to ensure it worked).
Two functions in expand_calls.go that performed overlapping
things were combined into a single function that is called
twice.
Fixes#42236.
For #40724.
Change-Id: Icbb78947eaa39f17f2c1210d5c2caef20abd6571
Reviewed-on: https://go-review.googlesource.com/c/go/+/262117
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
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Some of the current functions for encoding load/store with
immediate offset instructions, like opstr12(), opstr9(),
opldr12(), opldr9() and opldrpp(), etc., they have the same
code, so this patch refactors them and merges them into two
functions opstr() and opldr().
Change-Id: I60367f8b720b77c7ebe6d66905a950dcf7701836
Reviewed-on: https://go-review.googlesource.com/c/go/+/263479
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
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Trust: fannie zhang <Fannie.Zhang@arm.com>
Drop error check because errors can be
not only ErrTxDone for tx stmt executions,
and the purpose of the test is just reproducing
deadlock.
Fixes#42259
Change-Id: I9e7105ada1403ec7064dcc1c3385b36893a1c195
Reviewed-on: https://go-review.googlesource.com/c/go/+/266097
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
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This is done by decomposing the number to be divided in 32-bit
components and using the 32-bit magic multiply. For the lowering to be
effective the constant must fit in 16 bits.
On ARM the expression n / 5 compiles to 25 instructions.
Benchmark for GOARCH=arm (Cortex-A53)
name old time/op new time/op delta
DivconstU64/3-6 1.19µs ± 0% 0.03µs ± 1% -97.40% (p=0.000 n=9+9)
DivconstU64/5-6 1.18µs ± 1% 0.03µs ± 1% -97.38% (p=0.000 n=10+8)
DivconstU64/37-6 1.13µs ± 1% 0.04µs ± 1% -96.51% (p=0.000 n=10+8)
DivconstU64/1234567-6 852ns ± 0% 901ns ± 1% +5.73% (p=0.000 n=8+9)
Benchmark for GOARCH=386 (Haswell)
name old time/op new time/op delta
DivconstU64/3-4 18.0ns ± 2% 5.6ns ± 1% -69.06% (p=0.000 n=10+10)
DivconstU64/5-4 17.8ns ± 1% 5.5ns ± 1% -68.87% (p=0.000 n=9+10)
DivconstU64/37-4 17.8ns ± 1% 7.3ns ± 0% -58.90% (p=0.000 n=10+10)
DivconstU64/1234567-4 17.5ns ± 1% 16.0ns ± 0% -8.55% (p=0.000 n=10+9)
Change-Id: I38a19b4d59093ec021ef2e5241364a3dad4eae73
Reviewed-on: https://go-review.googlesource.com/c/go/+/264683
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
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Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Fixes#42223
Change-Id: Icf9bb61d48f0a6c7fd6f74e80e333a4837aa52ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/265781
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Also make canMergeSym take Syms instead of interface{}
Change-Id: I4926a1fc586aa90e198249d67e5b520404b40869
Reviewed-on: https://go-review.googlesource.com/c/go/+/265817
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
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Reviewed-by: Keith Randall <khr@golang.org>
rewrite.go has two identical functions log2 and log64; the former has
been there for a while, while the latter was added together with
log{8,16,32} for use in typed rules.
This change deletes log2 and switches to using log64 everywhere.
Change-Id: I759b878814e4c115a5fa470274f22477738d69ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/265457
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Update #40995
Change-Id: I6963ead1a7c4520092361cce80edb17010e7f436
Reviewed-on: https://go-review.googlesource.com/c/go/+/250579
Trust: Joel Sing <joel@sing.id.au>
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Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
The g register is now in X27 (previously X4, which collided with TP usage). Remove
X27 from preempt save/restore.
Change-Id: I9dd38ec3a8222fa0710757463769dbfac8ae7d20
Reviewed-on: https://go-review.googlesource.com/c/go/+/265517
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
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Following golang.org/cl/259578, findrunnable still must touch every
other P in checkTimers in order to look for timers to steal. This scales
poorly with GOMAXPROCS and potentially performs poorly by pulling remote
Ps into cache.
Add timerpMask, a bitmask that tracks whether each P may have any timers
on its timer heap.
Ideally we would update this field on any timer add / remove to always
keep it up to date. Unfortunately, updating a shared global structure is
antithetical to sharding timers by P, and doing so approximately doubles
the cost of addtimer / deltimer in microbenchmarks.
Instead we only (potentially) clear the mask when the P goes idle. This
covers the best case of avoiding looking at a P _at all_ when it is idle
and has no timers. See the comment on updateTimerPMask for more details
on the trade-off. Future CLs may be able to expand cases we can avoid
looking at the timers.
Note that the addition of idlepMask to p.init is a no-op. The zero value
of the mask is the correct init value so it is not necessary, but it is
included for clarity.
Benchmark results from WakeupParallel/syscall/pair/race/1ms (see
golang.org/cl/228577). Note that these are on top of golang.org/cl/259578:
name old msec new msec delta
Perf-task-clock-8 244 ± 4% 246 ± 4% ~ (p=0.841 n=5+5)
Perf-task-clock-16 247 ±11% 252 ± 4% ~ (p=1.000 n=5+5)
Perf-task-clock-32 270 ± 1% 268 ± 2% ~ (p=0.548 n=5+5)
Perf-task-clock-64 302 ± 3% 296 ± 1% ~ (p=0.222 n=5+5)
Perf-task-clock-128 358 ± 3% 352 ± 2% ~ (p=0.310 n=5+5)
Perf-task-clock-256 483 ± 3% 458 ± 1% -5.16% (p=0.008 n=5+5)
Perf-task-clock-512 663 ± 1% 612 ± 4% -7.61% (p=0.008 n=5+5)
Perf-task-clock-1024 1.06k ± 1% 0.95k ± 2% -10.24% (p=0.008 n=5+5)
Updates #28808
Updates #18237
Change-Id: I4239cd89f21ad16dfbbef58d81981da48acd0605
Reviewed-on: https://go-review.googlesource.com/c/go/+/264477
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Trust: Michael Pratt <mpratt@google.com>
This reverts commit 8f26b57f9a.
Reason for revert: break a bunch of code, include standard library.
Fixes#42123
Change-Id: Ife90ecbafd2cb395623d1db555fbfc9c1b0098e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/264026
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Reviewed-by: Russ Cox <rsc@golang.org>
procfs(5) is not always mounted in DragonFly BSD, for example during
the binary package build with synth. os.Executable() consumers
will then fail, we've spotted this when trying to build tinygo:
[...]
copying source files
./build/tinygo build-builtins -target=armv6m-none-eabi [...]
panic: could not get executable path: readlink /proc/curproc/file:
no such file or directory
[...]
Use KERN_PROC_PATHNAME as FreeBSD does.
Change-Id: Ic65bea02cd0309fb24dec8ba8d2b151d1acde67b
GitHub-Last-Rev: 083120a43b
GitHub-Pull-Request: golang/go#36826
Reviewed-on: https://go-review.googlesource.com/c/go/+/216622
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Tx acquires tx.closemu W-lock and then acquires stmt.closemu.W-lock
to fully close the transaction and associated prepared statement.
Stmt query and execution run in reverse ways - acquires
stmt.closemu.R-lock and then acquires tx.closemu.R-lock to grab tx
connection, which may cause deadlock.
Prevent the lock is held around tx.closePrepared to ensure no
deadlock happens.
Fixes#40985
Change-Id: If53909822b87bce11861a6e3035ecb9476d2cd17
Reviewed-on: https://go-review.googlesource.com/c/go/+/250178
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Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Follow-up for CL 265819.
Given the -pre tag added recently, a new stable version is likely
tagged soon. This would break TestCodeRepoVersions on the longtest
builders again. Since the other test cases in codeRepoVersionsTests
already provide enough coverage, drop gopkg.in/russross/blackfriday.v2
to avoid breaking TestCodeRepoVersions once the release happens.
Updates #28856
Change-Id: If86a637b5e47f59faf9048fc1cbbae6e8f1dcc53
Reviewed-on: https://go-review.googlesource.com/c/go/+/265917
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Sysmon can actually get the RW lock execLock while holding the sysmon
lock (if no M is available), so there is an edge from lockRankSysmon to
lockRankRwmutexR. The stack trace is sysmon() [gets sched.sysmonlock] ->
startm() -> newm() -> newm1() -> execLock.runlock() [gets
execLock.rLock]
Change-Id: I9658659ba3899afb5219114d66b989abd50540db
Reviewed-on: https://go-review.googlesource.com/c/go/+/265721
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
With previous CLs, internal linking without cgo should work well.
Enable it by default. And stop always requiring cgo.
Enable tests that were previously disabled due to the lack of
internal linking.
Updates #38485.
Change-Id: I45125b9c263fd21d6847aa6b14ecaea3a2989b29
Reviewed-on: https://go-review.googlesource.com/c/go/+/265121
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Now that we have the G register saved, we can enable asynchronous
preemption for pure Go programs on darwin/arm64.
Updates #38485, #36365.
Change-Id: Ic654fa4dce369efe289b38d59cf1a184b358fe9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/265120
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Now that we always have TLS set up, we can always save the G
register, regardless of whether cgo is used. This makes pure Go
programs signal-safe.
Updates #38485.
Change-Id: Icbc69acf0e2a5652fbcbbd074258a1a5efe87f1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/265119
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Currently, on darwin/arm64 we set up TLS using cgo. TLS is not
set for pure Go programs. As we use libc for syscalls on darwin,
we need to save the G register before the libc call. Otherwise it
is not signal-safe, as a signal may land during the execution of
a libc function, where the G register may be clobbered.
This CL initializes TLS in Go, by calling the pthread functions
directly without cgo. This makes it possible to save the G
register to TLS in pure Go programs (done in a later CL).
Inspired by Elias's CL 209197. Write the logic in Go instead of
assembly.
Updates #38485, #35853.
Change-Id: I257ba2a411ad387b2f4d50d10129d37fec7a226e
Reviewed-on: https://go-review.googlesource.com/c/go/+/265118
Trust: Cherry Zhang <cherryyz@google.com>
Trust: Elias Naur <mail@eliasnaur.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Implement runtime.duffzero and runtime.duffcopy for riscv64.
Use obj.ADUFFZERO/obj.ADUFFCOPY for medium size, word aligned
zeroing/moving.
Change-Id: I42ec622055630c94cb77e286d8d33dbe7c9f846c
Reviewed-on: https://go-review.googlesource.com/c/go/+/237797
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
