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Commit Graph

49450 Commits

Author SHA1 Message Date
Joel Sing
0b66310924 cmd/internal/obj/riscv: avoid obj.Prog rewriting for store instructions
Rather than rewriting the obj.Prog for a store instruction, generate the
appropriate machine instruction sequence directly.

Change-Id: I026250ca3d249a1013243948a4e567b708b72d0c
Reviewed-on: https://go-review.googlesource.com/c/go/+/344452
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-04 10:43:00 +00:00
Joel Sing
8a01010c26 cmd/internal/obj/riscv: avoid obj.Prog rewriting for load instructions
Rather than rewriting the obj.Prog for a load instruction, generate the
appropriate machine instruction sequence directly.

Change-Id: Iba656dbf2dff2bce02aa221d9a5cad7b7c4630d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/344451
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-04 10:42:46 +00:00
Joel Sing
9cb5716f00 cmd/internal/obj/riscv: avoid obj.Prog rewriting for constant loads
Rather than rewriting the obj.Prog for a MOV pseudo-instruction targeting
a constant to register load, generate the appropriate machine instruction
sequence directly.

Change-Id: I38e62f282b39be2a0a241f32280d306558d49b44
Reviewed-on: https://go-review.googlesource.com/c/go/+/344450
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-04 10:42:34 +00:00
Tao Qingyun
4957976b1a cmd/link: make npkgsyms meaningful
npkgsyms always equals 1 currently.

Change-Id: Ie88bc273beaace12ec7432054ca7c151396e8e35
GitHub-Last-Rev: c5d3b12b88
GitHub-Pull-Request: golang/go#46988
Reviewed-on: https://go-review.googlesource.com/c/go/+/331929
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2021-09-03 22:56:58 +00:00
Tim King
d9244f8b64 Revert "go/ast: clarify when Ident.Obj is nil"
This reverts commit 52aef05498.

Reason for revert: After discussion on CL 347530, it is not clear this is an improvement to the documentation.

Updates #48141

Change-Id: I5f3d9995c5f5666b92602c4b8ec393673baa73fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/347592
Trust: Cherry Mui <cherryyz@google.com>
Trust: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-09-03 21:31:30 +00:00
rhysd
04d8d24960 misc/wasm: enable ECMAScript strict mode
Current wasm_exec.js does not enable ECMAScript strict mode. But it is
recommended to be enabled because it

1. eliminates some ECMAScript silent errors by changing them to throw
   errors
2. fixes mistakes that make it difficult for JavaScript engines to
   perform optimizations
3. prohibits some syntax likely to be defined in future versions of
   ECMAScript

This commit enables ECMAScript strict mode in wasm_exec.js following the
transition guide:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode/Transitioning_to_strict_mode

Fixes #47116

Change-Id: Ib8ffceee37e9127698fb51304241f1e429efe83e
Reviewed-on: https://go-review.googlesource.com/c/go/+/334269
Reviewed-by: Richard Musiol <neelance@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Richard Musiol <neelance@gmail.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-03 19:56:09 +00:00
Cuong Manh Le
52aef05498 go/ast: clarify when Ident.Obj is nil
Fixes #48141

Change-Id: Id20b7801d31456ffd74301ed0fd84788b8982fb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/347530
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-03 15:32:47 +00:00
Joel Sing
ab7c904bf2 cmd/internal/obj/riscv: factor out instructions for MOV pseudo-instructions
This factors out the machine instruction generation for MOV pseudo-instructions,
which will simplify further changes.

Change-Id: Ic0d2c3ae9e0881f7894af50ed45e93b0e4961632
Reviewed-on: https://go-review.googlesource.com/c/go/+/344461
Trust: Joel Sing <joel@sing.id.au>
Trust: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-09-03 05:27:58 +00:00
Brad Fitzpatrick
17910ed4ff refect: rename Ptr Kind to Pointer (but keep Ptr)
reflect.Ptr didn't match reflect.UnsafePointer or unsafe.Pointer
so rename it to reflect.Pointer. Keep reflect.Ptr for compatibility.

Likewise with PtrTo.

Change to use it in std will come in a subsequent CL.

Fixes #47651

Change-Id: I5d4abe2b2fe10948bd68bb12c557165bedffbcba
Reviewed-on: https://go-review.googlesource.com/c/go/+/341333
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-09-03 04:24:17 +00:00
Nigel Tao
9f69a44308 image/draw: add RGBA64Image fast path
name               old time/op  new time/op  delta
GenericOver-4      15.0ms ± 1%   2.9ms ± 1%  -80.56%  (p=0.008 n=5+5)
GenericMaskOver-4  7.82ms ± 4%  1.69ms ± 2%  -78.38%  (p=0.008 n=5+5)
GenericSrc-4       6.13ms ± 3%  1.66ms ± 1%  -72.90%  (p=0.008 n=5+5)
GenericMaskSrc-4   11.5ms ± 1%   2.0ms ± 0%  -82.77%  (p=0.008 n=5+5)

Updates #44808.

Change-Id: I131cf6fad01708540390a8012d8f2a21e849fe9d
Reviewed-on: https://go-review.googlesource.com/c/go/+/340049
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Nigel Tao <nigeltao@golang.org>
2021-09-03 01:38:54 +00:00
Joe Sylve
065f380815 debug/dwarf: check for DWARFv4 AttrDataBitOffset value
AttrBitOffset is deprecated (but reserved) in DWARFv4.  This fix adds
logic to check the new AttrDataBitOffset attribute if AttrBitOffset
attribute is not present.

Fixes #46784

Change-Id: I7406dcaa4c98e95df72361fd4462c39e6be8879d
GitHub-Last-Rev: 5aa10d0491
GitHub-Pull-Request: golang/go#46790
Reviewed-on: https://go-review.googlesource.com/c/go/+/328709
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
2021-09-02 19:56:24 +00:00
Cherry Mui
a8aa6cfa6d cmd/compile: correct a comment in uint64Tofloat
We only do z>>1 once (as it should be). Remove the extra one
in the comment.

Change-Id: I6fea05fe697de07e160bd686697377babcb3e4c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/347400
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-09-02 19:36:22 +00:00
Matthew Dempsky
58244eee01 test: only test -G=3 by default
-G=0 is in maintenance mode, so limit testing it to the longtest
builders.

Change-Id: Ie8a01866b506183d0201f2a3730377cfa663da80
Reviewed-on: https://go-review.googlesource.com/c/go/+/347298
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-02 19:33:52 +00:00
Cuong Manh Le
9633195ae1 src: do not emit warning when GOROOT_BOOTSTRAP is unset
Fixes #48155

Change-Id: I610a20d3af55035bb0b1047509361b204253801e
Reviewed-on: https://go-review.googlesource.com/c/go/+/347273
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-09-02 19:16:19 +00:00
Robert Findley
7609b50701 go/types: systematic detection of missing instantiation
This is a port of CL 346471 to go/types. Additionally, CheckExpr was
updated for the new API to explicitly allow generic expressions.

The error messages in issue39634.go2 are different because go/parser
produces an IndexExpr with BadExpr index value, for backward
compatibility.

Change-Id: I725926de183a016381513fe0e750d1280688ce29
Reviewed-on: https://go-review.googlesource.com/c/go/+/347391
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-09-02 17:30:32 +00:00
Damien Neil
acc2957bc9 net/http: fix hang in probing for a zero-length request body
Fix a hang that occurs when making a request and all of the following apply:
* The request method is one of GET, HEAD, DELETE, OPTIONS, PROPFIND, or SEARCH.
* The Request.Body is non-nil.
* The content length is not set, or is set to -1.
* Transfer-Encoding: chunked is not set.
* The request body does not respond to a read within 200ms.

In this case, we give up on probing for a zero-length body and send the
request while the probe completes in the background. Fix a bug in the
io.Reader wrapping the in-flight probe: It should return io.EOF after
the probe completes, but does not.

Fixes #47568.

Change-Id: I7f9188c96e1210055df68424081af927006e4816
Reviewed-on: https://go-review.googlesource.com/c/go/+/340256
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ingo Oeser <nightlyone@googlemail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2021-09-02 17:00:30 +00:00
Damien Neil
2a463a22ce net/http: close request body after recovering from a handler panic
When recovering from a panic in a HTTP handler, close the request body
before closing the *conn, ensuring that the *conn's bufio.Reader is safe
to recycle.

Fixes #46866.

Change-Id: I3fe304592e3b423a0970727d68bc1229c3752939
Reviewed-on: https://go-review.googlesource.com/c/go/+/329922
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2021-09-02 16:59:57 +00:00
Dmitri Shuralyov
ead3fe0dba all: update vendored dependencies for Go 1.18
Go 1.18 development is well underway. This is a time to update all
golang.org/x/... module versions that contribute packages to the std
and cmd modules in the standard library to latest master versions.

	gotip $ updatestd -goroot=$(pwd) -branch=master
	> go version
	go version devel go1.18-2872496ba5 Wed Sep 1 23:41:53 2021 +0000 darwin/amd64
	> go env GOROOT
	/Users/dmitshur/gotip
	> go version -m /Users/dmitshur/go/bin/bundle
	/Users/dmitshur/go/bin/bundle: go1.17
		path	golang.org/x/tools/cmd/bundle
		mod	golang.org/x/tools	v0.1.5	h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA=
		dep	golang.org/x/mod	v0.4.2	h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
		dep	golang.org/x/sys	v0.0.0-20210510120138-977fb7262007	h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
		dep	golang.org/x/xerrors	v0.0.0-20200804184101-5ec99f83aff1	h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=

	skipping github.com/chzyer/logex (out of scope, it's not a golang.org/x dependency)
	skipping github.com/chzyer/readline (out of scope, it's not a golang.org/x dependency)
	skipping github.com/chzyer/test (out of scope, it's not a golang.org/x dependency)
	skipping github.com/google/pprof (out of scope, it's not a golang.org/x dependency)
	skipping github.com/ianlancetaylor/demangle (out of scope, it's not a golang.org/x dependency)
	skipping github.com/yuin/goldmark (out of scope, it's not a golang.org/x dependency)
	skipping golang.org/x/tools (temporarily out of scope due to golang.org/issue/48124)
	skipping rsc.io/pdf (out of scope, it's not a golang.org/x dependency)
	updating module cmd in /Users/dmitshur/gotip/src/cmd
	> go mod edit -go=1.18
	> go get -d golang.org/x/arch@ebb09ed340f18f7e2a2200f1adf792992c448346 golang.org/x/crypto@32db794688a5a24a23a43f2a984cecd5b3d8da58 golang.org/x/mod@1b1db11ec8f43eeafa9418698423dc637655ff0c golang.org/x/net@e898025ed96aa6d08e98132b8dca210e9e7a0cd2 golang.org/x/sync@036812b2e83c0ddf193dd5a34e034151da389d09 golang.org/x/sys@f4d43177bf5e2ee98617956e417d0555d4b69c17 golang.org/x/term@6886f2dfbf5b25f595b4fe4279c49956e867c59b golang.org/x/text@383b2e75a7a4198c42f8f87833eefb772868a56f golang.org/x/xerrors@5ec99f83aff198f5fbd629d6c8d8eb38a04218ca
	go get: upgraded golang.org/x/arch v0.0.0-20210502124803-cbf565b21d1e => v0.0.0-20210901143047-ebb09ed340f1
	go get: upgraded golang.org/x/mod v0.5.1-0.20210827163434-4029241eb1d5 => v0.5.1-0.20210830214625-1b1db11ec8f4
	go get: upgraded golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 => v0.0.0-20210825183410-e898025ed96a
	go get: upgraded golang.org/x/term v0.0.0-20210503060354-a79de5458b56 => v0.0.0-20210615171337-6886f2dfbf5b
	go get: upgraded golang.org/x/text v0.3.3 => v0.3.7
	> go mod tidy
	> go mod vendor

	skipping golang.org/x/tools (temporarily out of scope due to golang.org/issue/48124)
	updating module std in /Users/dmitshur/gotip/src
	> go mod edit -go=1.18
	> go get -d golang.org/x/crypto@32db794688a5a24a23a43f2a984cecd5b3d8da58 golang.org/x/net@e898025ed96aa6d08e98132b8dca210e9e7a0cd2 golang.org/x/sys@f4d43177bf5e2ee98617956e417d0555d4b69c17 golang.org/x/term@6886f2dfbf5b25f595b4fe4279c49956e867c59b golang.org/x/text@383b2e75a7a4198c42f8f87833eefb772868a56f
	go get: upgraded golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 => v0.0.0-20210615171337-6886f2dfbf5b
	go get: upgraded golang.org/x/text v0.3.7-0.20210503195748-5c7c50ebbd4f => v0.3.7
	> go mod tidy
	> go mod vendor

	updating bundles in /Users/dmitshur/gotip/src
	> go generate -run=bundle std cmd

The x/tools module will be updated in a following CL,
after issue #48124 is resolved.

The module in GOROOT/src/crypto/ed25519/internal/edwards25519/field/_asm
directory is not updated in this CL.

For #36905.

Change-Id: I728000e8465c0fbf6976629e6da42cc4f9be20fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/347191
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2021-09-02 16:37:53 +00:00
Robert Findley
08588e6036 go/internal/gcimporter: always call SetTParams, even if empty
This resolves an outstanding TODO to be consistent about calling
SetTParams.

Done in both go/internal/gcimporter and cmd/compile/internal/importer.

Change-Id: Ief642efe016f02bab1bab960f6731a0ac0a8ad28
Reviewed-on: https://go-review.googlesource.com/c/go/+/347389
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-09-02 16:26:26 +00:00
Dmitri Shuralyov
d01388b04f all: update vendored golang.org/x/crypto
Ran the following commands inside std and cmd modules:

	go get -d golang.org/x/crypto@32db794688a5a24a23a43f2a984cecd5b3d8da58  # master
	go mod tidy
	go mod vendor

Also add the new golang.org/x/crypto/curve25519/internal/field package
(it was created in x/crypto CL 315269) to TestDependencies in go/build.
Position it next to its upstream copy, since its required dependencies
are expected to be identical.

For #36905.

Change-Id: I589499cd7176c9b4b8758e59025653d19b58130e
Reviewed-on: https://go-review.googlesource.com/c/go/+/347190
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
2021-09-02 16:15:00 +00:00
Keith Randall
782aa42255 cmd/link: mark stacks as non-executable on freebsd
Fixes #48112

Change-Id: I673a5fe61171e5ba3d8ce58daac79391fb4758f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/346872
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-02 15:14:50 +00:00
Dmitri Shuralyov
d8b156773c all: update vendored golang.org/x/sys
Ran the following commands inside std and cmd modules:

	go get -d golang.org/x/sys@f4d43177bf5e2ee98617956e417d0555d4b69c17  # master
	go mod tidy
	go mod vendor

Followed by the following command in std module:

	go generate syscall internal/syscall/...

For #36905.

Change-Id: I53d6ba03246372b6f7abd5ac57dbb71715d6eb4a
Reviewed-on: https://go-review.googlesource.com/c/go/+/347189
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2021-09-02 15:05:39 +00:00
Than McIntosh
014a9720f9 cmd/link: avoid crash on undefined func sym with external linking
Fix a buglet in relocation processing that crops up with external
linking when you have an undefined function symbol that also has a
prototype (as if it were being defined in assembly src).

Fixes #47993.

Change-Id: Ib655492a63b205ffdc124cfd0cb7f7b731571821
Reviewed-on: https://go-review.googlesource.com/c/go/+/345473
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-09-02 14:44:50 +00:00
Ben Shi
37d4532867 cmd/internal/obj/riscv: simplify addition with constant
This CL simplifies riscv addition (add r, imm) to
(ADDI (ADDI r, imm/2), imm-imm/2) if imm is in specific ranges.
(-4096 <= imm <= -2049 or 2048 <= imm <= 4094)

There is little impact to the go1 benchmark, while the total
size of pkg/linux_riscv64 decreased by about 11KB.

Change-Id: I236eb8af3b83bb35ce9c0b318fc1d235e8ab9a4e
GitHub-Last-Rev: a2f56a0763
GitHub-Pull-Request: golang/go#48110
Reviewed-on: https://go-review.googlesource.com/c/go/+/346689
Run-TryBot: Ben Shi <powerman1st@163.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Michael Munday <mike.munday@lowrisc.org>
2021-09-02 14:35:10 +00:00
Robert Findley
4fb79569d2 go/internal/gcimporter: add import tests for type parameters
Add a new test TestImportTypeparamTests that compiles and imports
packages contained in test/typeparam, and compares the resulting package
scope with the scope produced by type-checking directly.

In the process, fix a bug in go/types affecting embedded instances with
more than one type argument. This was uncovered by smoketest.go.

To enable this new test it was easiest to move gcimporter_test.go to an
external test, which required copying the pkgExts variable.

Fixes #48101

Change-Id: Ie4d981bf463e886a8d141809805d184dbbf64607
Reviewed-on: https://go-review.googlesource.com/c/go/+/347070
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-09-02 14:05:36 +00:00
Robert Findley
b8420baf46 go/internal/gcimporter: add support for importing parameterized types
Port the necessary logic to go/internal/gcimporter from
cmd/compile/internal/importer/iimport.go to support type parameters.

This is a partial port of several compiler CLs: at least CL 319930,
CL 322609, CL 323029, CL 338192, CL 340251, and CL 340989. Because these
ports were not interleaved with the corresponding go/types API changes,
it is easier to just take the latest importer logic.

Notably, the equivalent of types2.AsTypeParam is not used. It should be
unnecessary.

Updates #48101

Change-Id: I938bd8debc3f6a68a3ad8d44c61ef9c5038be7e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/347069
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2021-09-02 14:02:42 +00:00
Hans
4591f49938 runtime: do not alloc never used tail bytes in fixalloc
Currently, the '_FixAllocChunk % fixalloc.size' tail bytes
will never be used when allocing from persistentalloc.

Wasted bytes on darwin/amd64:
  _FixAllocChunk % mheap_.spanalloc.size             = 64
  _FixAllocChunk % mheap_.cachealloc.size            = 784
  _FixAllocChunk % mheap_.specialfinalizeralloc.size = 16
  _FixAllocChunk % mheap_.specialprofilealloc.size   = 16
  _FixAllocChunk % mheap_.specialReachableAlloc.size = 16
  _FixAllocChunk % mheap_.arenaHintAlloc.size        = 16

After this commit, fixalloc alloc '_FixAllocChunk / fixalloc.size'
objects exactly with zero waste. Sizeof(fixalloc{}) is unchanged.

Change-Id: Ifc551f5b7aa9d842fa559abbe532ffcfb4d3540c
GitHub-Last-Rev: e08b4c66b8
GitHub-Pull-Request: golang/go#47439
Reviewed-on: https://go-review.googlesource.com/c/go/+/338090
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2021-09-02 13:53:25 +00:00
Carlo Alberto Ferraris
a35c5c98c0 runtime: constify a test variable
Simple cleanup, no functionality change.

Change-Id: I8eceda4496a396e0117a0a601186c653982fb004
GitHub-Last-Rev: 58defc575e
GitHub-Pull-Request: golang/go#47389
Reviewed-on: https://go-review.googlesource.com/c/go/+/337289
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2021-09-02 13:52:06 +00:00
Hans
90ed541149 runtime: ensure the fixalloc object size is valid
Usually, fixalloc is used to allocate small, persistent and reuseable
objects. The size is typically between range [sizeof(mlink), _FixAllocChunk].

It's rare for being out of the range. But if it did happen, we got a
hard-to-discover memory corruption. This commit prevents that situation by limiting object's size.

Change-Id: If6ef8b0831596464e0f55d09f79094b79ae08c66
GitHub-Last-Rev: cb8b1b01bb
GitHub-Pull-Request: golang/go#47395
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2021-09-02 13:45:48 +00:00
Xargin
69107e73ce runtime: change 0 to pollNoError in netpollblock
Change-Id: I95e91ff21420e396aef876e77bc4ccdc45ab40ca
GitHub-Last-Rev: 8e6bd3f002
GitHub-Pull-Request: golang/go#47372
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2021-09-02 13:44:36 +00:00
Leonard Wang
08e2519ded cmd/compile: workaround inlining of closures with range statements
ORANGE is still not inlineable now. This CL is correct only when the range statement is statically dead, and thus not counted during the inline budget check.
If we support range statements in inlining closures in the future, may require additional processing.

Fixes #48033.

Change-Id: I28f5755c28cfa27e41daef9eff2ae332059909bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/345436
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2021-09-02 12:49:05 +00:00
Tobias Klauser
6705191e02 syscall: drop fallback to accept in Accept on Linux
The minimum required Linux kernel version for Go 1.18 will be changed to
2.6.32, see #45964. The current minimum required version is 2.6.23 and
accept4 was added in 2.6.28, so the fallback to accept in Accept on
Linux can be removed.

For #45964

Change-Id: I78fc4e5b58417bbc540912c9dbf1b1b3db888fea
Reviewed-on: https://go-review.googlesource.com/c/go/+/346849
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2021-09-02 09:25:10 +00:00
Tobias Klauser
17e9d148d3 syscall: drop fallback to utimes in UtimesNano on Linux
The minimum required Linux kernel version for Go 1.18 will be changed to
2.6.32, see #45964. The current minimum required version is 2.6.23 and
utimensat was added in 2.6.22, so the fallback isn't even necessary for
the current minimum supported version. Remove the fallback to utimes.

For #45964

Change-Id: I5536f6ea7a34944dd9165f1533c10692171fb0c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/346790
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2021-09-02 09:24:59 +00:00
Tobias Klauser
d13d62c49a os, syscall: remove fallback to pipe syscall on Linux
The minimum required Linux kernel version for Go 1.18 will be changed to
2.6.32, see #45964. The pipe2 syscall was added in 2.6.27, so the
fallback to use the pipe syscall in os.Pipe and syscall.forkExecPipe on
Linux can be removed.

For #45964

Change-Id: I033a534f2b39e9bafc9980c9ce980e92f1e3a136
Reviewed-on: https://go-review.googlesource.com/c/go/+/346789
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2021-09-02 09:24:44 +00:00
Cuong Manh Le
840b4292c9 src: emit warning when make.bash run with invalid GOROOT_BOOTSTRAP
When setting an invalid GOROOT_BOOTSTRAP, make.bash try looking at env to
find a valid go command and use that GOROOT instead. It's better if the
script emit a warning, instead of silently change the GOROOT_BOOTSTRAP.

Change-Id: I6038093d5e8c072da27bcae44b125f6774f809a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/326030
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2021-09-02 07:31:53 +00:00
Cuong Manh Le
1ae7ddc235 test: always run test in unified IR mode regardless of explicit -G flag
Currently, if a test explicitly specify -G flag, if that flag conflict
with compiler default -G flag, the test will be skipped. That's the
reason CL 346469 haven't fixed the unified IR stuff, but still make the
unified builder passed.

This CL makes run.go always run the test in unified IR mode, regardless
of the explicit -G flag specified.

Updates #48094

Change-Id: I959ecaff6aca07844f0ffcf36caa60cf0747e8ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/347271
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2021-09-02 06:44:04 +00:00
Cuong Manh Le
3db4888a05 cmd/compile: use types2.Unsafe to represent package unsafe in gcimports
Followup todo in CL 346769.

Change-Id: I6c870014523426d65d135da999f97a818a997237
Reviewed-on: https://go-review.googlesource.com/c/go/+/347270
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2021-09-02 06:43:58 +00:00
Cuong Manh Le
9afbf82667 cmd/compile: allow objStub from unsafe package
CL 346469 added support for unsafe.Sizeof and friends to operate on
generic parameters for compiler importer/exporter. This CL adds support
for unified IR.

Updates #48094

Change-Id: I63af1a7c3478f59b03ecc23229ac2254d3457868
Reviewed-on: https://go-review.googlesource.com/c/go/+/346769
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2021-09-02 06:43:50 +00:00
Meng Zhuo
1bd35fab05 runtime: use vDSO clock_gettime on linux/riscv64
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
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2021-09-02 01:23:38 +00:00
Robert Griesemer
df4c625d88 cmd/compile: disable type list syntax for the compiler
Add (temporary) syntax.AllowTypeLists mode to control the
acceptance of type lists; the compiler doesn't set it,
but existing syntax and types2 tests do so that the code
remains exercised while it exists.

Adjust various tests to use the type set notation.

Change-Id: I798e607912552db6bfe38a7cd4324b74c6bf4d95
Reviewed-on: https://go-review.googlesource.com/c/go/+/347249
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2021-09-02 01:06:17 +00:00
Robert Griesemer
2872496ba5 cmd/compile/internal/types2: systematic detection of missing instantiation
When type-checking expressions, detection of uninstantiated generic
functions and types was somewhat ad-hoc.

Add an extra parameter "allowGenerics" to rawExpr. If not set, the
result operand cannot be generic.

The only place where rawExpr is called with allowGenerics != false
is from exprOrType, which passes an allowGenerics parameter through.

The only place where exprOrType is called with allowGenerics == true
is when handling index expressions and calls. Make sure that we only
accept generic operands where expected, and check the other branches.

As a result, a recently added varType call (CL 345970) can be removed
again.

This also fixes a bug where an error for a conversion to generic
type was reported after the conversion (i.e., with the converted
value, rather than the generic type). Added a test case for that.

For #48048.

Change-Id: I8576326f5fcfb58d78b3ce8572068aa32e66c568
Reviewed-on: https://go-review.googlesource.com/c/go/+/346471
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2021-09-01 23:41:53 +00:00
Damien Neil
0bfd6fcea6 all: update golang.org/x/net to pull in CL 346890
For #42777.

Change-Id: I963db8c666e8bcf0fc4f390b359db6408a0f792b
Reviewed-on: https://go-review.googlesource.com/c/go/+/347010
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2021-09-01 22:28:21 +00:00
Matthew Dempsky
88859f3cd8 cmd/compile: optimize unified IR handling of imported functions
This CL skips reading of imported function bodies except from the
local package or for inlining. Previously, we wasted a bunch of CPU
and memory by reading in normal function bodies for all imported
functions and methods.

Change-Id: I0b3df3f4a3e2819117dac11a1f9e4526288c14d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/347030
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2021-09-01 21:38:48 +00:00
Matthew Dempsky
50f38d0405 cmd/compile: emit unified IR wrappers after inlining
This CL delays unified IR's wrapper generation to after inlining.

Change-Id: Idfe496663489d6b797a647eb17200c6322d0334a
Reviewed-on: https://go-review.googlesource.com/c/go/+/347029
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2021-09-01 21:38:43 +00:00
Leonard Wang
5e0f8edbdc cmd/compile: remove useless fcount
Change-Id: Ibc23b43dc9a7fabb27d7991977b283459f3deae3
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2021-09-01 21:26:54 +00:00
Michael Munday
ea51e223c2 cmd/{asm,compile}: add fused multiply-add support on riscv64
Add support to the assembler for F[N]M{ADD,SUB}[SD] instructions.
Argument order is:

  OP RS1, RS2, RS3, RD

Also, add support for the FMA intrinsic to the compiler. Automatic
FMA matching is left to a future CL.

Change-Id: I47166c7393b2ab6bfc2e42aa8c1a8997c3a071b3
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2021-09-01 21:17:04 +00:00
Cuong Manh Le
711e1c8224 cmd/compile: fix irgen mis-handling invalid function declaration
In -G=3 mode, irgen use its own generated IR, which is mis-handling of
bodyless function and declared function with //go:noescape pragma.

Fix this by adopting the same logic in noder.funcDecl, which minor
change in linkname detection.

Fixes #48097

Change-Id: Ibef921c1f75e071ca61685e0cb4543f2ee5efc7f
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2021-09-01 19:51:25 +00:00
seifchen
592ee433f5 spec: adjust example for consistency
Change-Id: I5ff9078907b78f31aec42abf749a193b15bc5109
GitHub-Last-Rev: 1f96d84f20
GitHub-Pull-Request: golang/go#47732
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2021-09-01 19:23:15 +00:00
Matthew Dempsky
6c5f028242 cmd/compile/internal/pkginit: separate "init" and "inittask" logic
This CL splits the creation of the "init" function responsible for
executing package-scope variable initialization statemens from the
creation of the "inittask" record that tells the runtime how to
sequence all program-wide package initialization.

Longer term, this is desirable because sorting variable initialization
is already handled by types2 (with Info.InitOrder), so we might as
well reuse that.

As a more immediate impetus, for unified IR, I want to defer method
wrapper generation until after inlining (to know which wrappers are
needed). But the staticinit optimization used to decide whether to
emit the inittask calls into reflectdata, which in turn tries to
generate its own method wrappers. So separating the work allows to
create the "init" function early and then emit "inittask" after
inlining is done.

Change-Id: Ice1d421f92feecaaeafdf7da6b9647c0f27e3571
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2021-09-01 18:16:17 +00:00
Paul E. Murphy
8f397bc118 cmd/internal/obj/ppc64: improve long conditional branch fixup
Improve the code which fixes up conditional branches which exceed the
range of a single instruction by inserting one extra jump when
possible instead of two.

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2021-09-01 17:25:30 +00:00