Adds helper functions for the literal pooling, large branch handling
and code emission stages of the span7 assembler pass. This hides the
implementation of the current assembler from the general workflow in
span7 to make the implementation easier to change in future.
Updates #44734
Change-Id: I8859956b23ad4faebeeff6df28051b098ef90fed
Reviewed-on: https://go-review.googlesource.com/c/go/+/595755
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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On Android, faccessat2 syscall (which supports flags like AT_EACCESS) is
not allowed, so syscall.Faccessat tries to emulate AT_EACCESS check in
userspace using os.Stat, os.Geteuid etc.
Also, according to [1],
> Android doesn't have setuid programs, and never runs code with euid!=uid.
This means on Android the proper AT_EACCESS check is neither possible
nor really needed.
Let's skip the syscall.Faccessat userspace emulation of AT_EACCESS
check and return ENOSYS, so the callers can use a fallback.
This should speed up exec.LookPath on Android.
[1]: 508b2f6e5c/libc/bionic/faccessat.cpp (50)
Change-Id: If7b529fa314480b70e9ae9cdd8c7ce82cd55d233
Reviewed-on: https://go-review.googlesource.com/c/go/+/611298
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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Eaccess, initially added by CL 414824 for linux only, was later
implemented for freebsd (CL 531155), netbsd (CL 531876), dragonfly
(CL 532675), openbsd (CL 538836), and darwin (CL 579976).
The only unix platforms which lack Eaccess are Solaris/Illumos and AIX.
For AIX, syscall.Faccessat is already available, the only missing piece
was AT_EACCESS constant. Let's take it from [1], which, judging by a few
other known AT_ constants, appears to be accurate.
For Solaris, wire the faccessat using the same logic as in the syscall
package.
Now, when we have faccessat for every unix, we can drop eaccess_other.go
and consolidate Eaccess implementations to use faccessat.
[1]: https://github.com/rust-lang/libc/blob/main/src/unix/aix/mod.rs
Change-Id: I7e1b90dedc5d8174235d3a79d5c662f3dcb909c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/611295
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Change-Id: I3d4c66793afa3769a8450e2d65093a0f9115596e
Reviewed-on: https://go-review.googlesource.com/c/go/+/611043
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Change-Id: I384a7391a26f24402c055aec98b37927305e2a39
Reviewed-on: https://go-review.googlesource.com/c/go/+/611042
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Change-Id: I09c134fff728d32c5bc475889b8c673cc18120a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/611041
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Function stdlibImportcfgFile creates a temporary directory and a file in
it, which are never deleted.
The easiest to fix this (without creating the file unnecessarily, or
creating it multiple times) is to add a global tmpDir and use it in
stdlibImportcfgFile.
Change-Id: Ia971b4478d9e0fa7c3a9b4c66e13fd5a4af9cbaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/610818
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Change-Id: I90fd0318c7f85032ef8b6621331fe2a8a2da41f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/611040
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Change-Id: I9828c7c4f9c27efabf072ec1d83b3ce94c14cc0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/610817
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Change-Id: I6c1d148ae4c899142b160533d8bdf662494bcd7c
Reviewed-on: https://go-review.googlesource.com/c/go/+/611039
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Change-Id: I62f1c51be89e9c2f22cc7b0b2e554ffa3da907ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/611038
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This code creates a few directories under a temporary directory that was
just created before, so using MkdirTemp is not needed here.
Change-Id: Icfc45b70349bc1927efb1647bcc9fd58aa82b792
Reviewed-on: https://go-review.googlesource.com/c/go/+/611037
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Change-Id: I35d47bcac37945237bfef9f06195bc55dc9aa920
Reviewed-on: https://go-review.googlesource.com/c/go/+/611036
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Currently when one of the tests in TestFiles fail, then the error looks
like this:
--- testdata/generics.input
+++ testdata/generics.golden
which is confusing, with this change it will be:
--- format(testdata/generics.input)
+++ testdata/generics.golden
Change-Id: Id5c080c5237acd82303d2f41cace8a3fe9ea08e0
GitHub-Last-Rev: aedafc05fd
GitHub-Pull-Request: golang/go#69292
Reviewed-on: https://go-review.googlesource.com/c/go/+/610559
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Cleaner code, less global variables
Change-Id: I6d842932e538849260b36fa408bc5ddae68c05ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/611018
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Rename initPathExts to pathExts, make it return the slice of extensions,
and wrap into sync.OnceValue.
While at it, return early if PATHEXT is empty.
Change-Id: I33508762e87edd226e0a52df4063473c496c0210
Reviewed-on: https://go-review.googlesource.com/c/go/+/611017
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Auto-Submit: Ian Lance Taylor <iant@google.com>
Use sync.OnceValues (CL 451356, since Go 1.21) instead of sync.Once for
cleaner code and less global variables, preventing their potential
misuse.
Change-Id: I9d7ccc42847fe77af1757672c31bb39e20007f92
Reviewed-on: https://go-review.googlesource.com/c/go/+/611016
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Now that Go 1.22.6 is the minimum bootstrap toolchain (cf. CL 606156),
the slices package (introduced in Go 1.21) can be used in packages built
using the bootstrap toolchain.
For #64751
Change-Id: I0115213da4b1f0a1fa0ef7ad34456fbf52e00fae
Reviewed-on: https://go-review.googlesource.com/c/go/+/611095
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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The new bootstrap toolchain allows us to use the built-in clear.
Updates #64751
Change-Id: Ic363e1059f34c46eaa4267c0b40a4ed8d5b3961b
GitHub-Last-Rev: 46ca735bfc
GitHub-Pull-Request: golang/go#69253
Reviewed-on: https://go-review.googlesource.com/c/go/+/610516
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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frugal no longer uses these methods from next Go version
Fixes#69222
Change-Id: Ie71de0752cabef7d5584d3392d6e5920ba742350
Reviewed-on: https://go-review.googlesource.com/c/go/+/609918
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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CL 580779 accidentally committed an un-gofmt-ed all_test.go
Change-Id: I071ad8d8d08cab12032ff8d3eebecb55e808f14a
Reviewed-on: https://go-review.googlesource.com/c/go/+/610561
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Commit-Queue: Ian Lance Taylor <iant@google.com>
With Checker.updateExprType0 and Checker.updateExprType being the
same now, rename updateExprType0 to updateExprType and remove the
old updateExprType.
Change-Id: Ib5c3d74e7fac9cedcc87ad521b7543b8d7f83943
Reviewed-on: https://go-review.googlesource.com/c/go/+/611276
Reviewed-by: Tim King <taking@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Change-Id: I4f52503bab569d85f28ae8920079de26a331b7ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/610560
Reviewed-by: Robert Griesemer <gri@google.com>
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Move the code for type checking of basic literals into literals.go.
In go/types, the respective code is now generated from the types2 source.
Change-Id: Ib21eb7a87e11b77bcb2469985f9844964d35df57
Reviewed-on: https://go-review.googlesource.com/c/go/+/610540
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Adjust Checker.overflow call sites to match types2
where possible.
Change-Id: Iaa0d423f2ebf642428c745c4ac4f712e4136dffb
Reviewed-on: https://go-review.googlesource.com/c/go/+/610956
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Move the code for type checking of function literals into
literals.go.
In go/types, the respective code is now generated from the types2 source.
Change-Id: Ic81ab3c0d3c66d99bc0f2e21d66bf9a896ef9375
Reviewed-on: https://go-review.googlesource.com/c/go/+/610996
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Preparation for generation of function literal type checking code
from types2 source.
Change-Id: I6b3029c34c2507d356ac8874154537bc6c38a715
Reviewed-on: https://go-review.googlesource.com/c/go/+/610995
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Change-Id: I0635101b984725ee24c2207ebfdb413d29212b67
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Preparation for generation of go/types/literals.go from types2 sources.
Change-Id: I9af23fbe1e448976394ddd7b348188c2595d8afe
Reviewed-on: https://go-review.googlesource.com/c/go/+/610557
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Move code into separate function in separate file.
Replace "goto Error" statements with "x.mode = invalid; return".
No other semantic changes.
Change-Id: I2d5e858e8df3dc1011fa79cdac3db9d3e7b1dfe5
Reviewed-on: https://go-review.googlesource.com/c/go/+/610556
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Generally, the parser strips (i.e., does not record in the syntax tree)
unnecessary parentheses. Specifically, given a type parameter list of
the form
[P (C),]
it records it as
[P C]
and then no comma is required when printing. However it did only strip
one level of parentheses, and
[P ((C)),]
made it through, causing a panic when printing. Somewhat related,
the printer stripped parentheses around constraints as well.
This CL implements a more consistent behavior:
1) The parser strips all parentheses around constraints. For testing
purposes, a local flag (keep_parens) can be set to retain the
parentheses.
2) The printer code now correctly intruces a comma if parentheses
are present (e.g., when testing with keep_parens). This case does
not occur in normal operation.
3) The printer does not strip parentheses around constraints since
the parser does it already.
For #69206.
Change-Id: I974a800265625e8daf9477faa9ee4dd74dbd17ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/610758
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Now that we're bootstrapping from a toolchain that has the slices
package.
Updates #64751
Change-Id: I876ec6d261466344faf33f8c5cda229dd1e4185f
Reviewed-on: https://go-review.googlesource.com/c/go/+/610602
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Now that we're bootstrapping from a toolchain that has the slices
package.
Updates #64751
Change-Id: I2e63d95577d058670d3dc75bd45d6e050c6f0e25
Reviewed-on: https://go-review.googlesource.com/c/go/+/610601
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Now that Go 1.22.6 is the minimum bootstrap toolchain (cf. CL 606156),
the slices package (introduced in Go 1.21) can be used in packages built
using the bootstrap toolchain.
For #64751
Change-Id: Ife0daa37c0982d9ec1afab07b9d40a1dfee9b7d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/610575
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This change makes sure that we do not format comments
as doc comments inside of a declaration and makes the
go doc formatter idempotent:
Previously:
// test comment
//go:directive2
// test comment
func main() {
}
was formatted to:
// test comment
//go:directive2
// test comment
func main() {
}
after another formatting, it got formatted with doc rules into:
// test comment
// test comment
//
//go:directive2
func main() {
}
With this change it gets directly to the correct form (last one).
Change-Id: Id7d8f03e43474357cd714e0672e886652c3fce86
GitHub-Last-Rev: 9833b87536
GitHub-Pull-Request: golang/go#69134
Reviewed-on: https://go-review.googlesource.com/c/go/+/609077
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Change-Id: I8b4c19ed1085d2ffb07e2c8db33a10b6d70988eb
Reviewed-on: https://go-review.googlesource.com/c/go/+/611015
Reviewed-by: Michael Matloob <matloob@golang.org>
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Limit the size of build constraints that we will parse. This prevents a
number of stack exhaustions that can be hit when parsing overly complex
constraints. The imposed limits are unlikely to ever be hit in real
world usage.
Fixes#69141
Fixes CVE-2024-34158
Change-Id: I38b614bf04caa36eefc6a4350d848588c4cef3c4
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1540
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Russ Cox <rsc@google.com>
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This change makes sure that we are properly checking the ignored field
recursion depth in decIgnoreOpFor consistently. This prevents stack
exhaustion when attempting to decode a message that contains an
extremely deeply nested struct which is ignored.
Thanks to Md Sakib Anwar of The Ohio State University (anwar.40@osu.edu)
for reporting this issue.
Fixes#69139
Fixes CVE-2024-34156
Change-Id: Iacce06be95a5892b3064f1c40fcba2e2567862d6
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1440
Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
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Now that we're bootstrapping from a toolchain that has the slices
package.
Updates #64751
Change-Id: I3227e55f87e033dae63a2d1712b7f9373fe49731
Reviewed-on: https://go-review.googlesource.com/c/go/+/610603
Reviewed-by: Robert Griesemer <gri@google.com>
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When testing with PWD set, it's possible for the stat of PWD to fail
with ENAMETOOLONG, and for syscall.Getwd to fail for the same reason.
If PWD contains symlinks, the fallback code won't know about them.
If Getwd returns the same result as PWD with resolved symlinks,
the test should not fail.
Change-Id: I39587ddb826d4e18339e185aad0cdd60167b1079
Reviewed-on: https://go-review.googlesource.com/c/go/+/610759
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tim King <taking@google.com>
When specifying the package to build, a relative path is sufficient.
Change-Id: I1ae08065b5cd77ec25be42dc1e664720a07baa62
Reviewed-on: https://go-review.googlesource.com/c/go/+/610039
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Commit-Queue: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Calls to os.Getwd were needed to set the cwd for go build to an absolute
path. Since CL 401340 os/exec takes care of setting PWD to a
filepath.Abs(cmd.Dir), so it looks like an absolute path is not
really required.
Change-Id: Ib3abffc9087a3329d8f40f81eb65f1b2c1a03a9c
Reviewed-on: https://go-review.googlesource.com/c/go/+/610038
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Commit-Queue: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Among other things, this should fix a regression in printf
whereby materialized aliases caused "any" and "interface{}"
in printf signatures not to be recognized as identical.
It also updates ureader.go used by vendored x/tools during
some tests, including cmd/internal/moddeps.TestAllDependencies.
This test uses golang.org/x/tools/cmd/bundle which uses x/reader.
Fixes#68796
Change-Id: I9f0711e66a5c4daaffe695c515aea3b8fb3d01e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/610736
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Tim King <taking@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This implementation utilizes the same registers found in the reference
implementation, aiming to produce a minimal semantic diff between the
Avo-generated output and the original hand-written assembly.
To verify the Avo implementation, the reference and Avo-generated
assembly files are fed to `go tool asm`, capturing the debug output into
corresponding temp files. The debug output contains supplementary
metadata (line numbers, instruction offsets, and source file references)
that must be removed in order to obtain a semantic diff of the two
files. This is accomplished via a small utility script written in awk.
The reference assembly file does not specify a frame size for a number
of the defined assembly functions. Avo automatically infers the frame
size when generating the TEXT directive, leading to a diff on those
lines.
Commands used to verify Avo output:
GOROOT=$(go env GOROOT)
ASM_PATH="src/crypto/internal/nistec/p256_asm_amd64.s"
REFERENCE="54fe0fd43fcf8609666c16ae6d15ed92873b1564"
go tool asm -o /dev/null -I "$GOROOT"/src/runtime -debug \
<(git cat-file -p "$REFERENCE:$ASM_PATH") \
> /tmp/reference.s
go tool asm -o /dev/null -I "$GOROOT"/src/runtime -debug \
"$ASM_PATH" \
> /tmp/avo.s
normalize(){
awk '{
$1=$2=$3="";
print substr($0,4)
}'
}
diff <(normalize < /tmp/reference.s) <(normalize < /tmp/avo.s)
1c1
< TEXT <unlinkable>.p256OrdLittleToBig(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256OrdLittleToBig(SB), NOSPLIT, $0-16
3c3
< TEXT <unlinkable>.p256OrdBigToLittle(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256OrdBigToLittle(SB), NOSPLIT, $0-16
5c5
< TEXT <unlinkable>.p256LittleToBig(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256LittleToBig(SB), NOSPLIT, $0-16
7c7
< TEXT <unlinkable>.p256BigToLittle(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256BigToLittle(SB), NOSPLIT, $0-16
23c23
< TEXT <unlinkable>.p256MovCond(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256MovCond(SB), NOSPLIT, $0-32
74c74
< TEXT <unlinkable>.p256NegCond(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256NegCond(SB), NOSPLIT, $0-16
99c99
< TEXT <unlinkable>.p256Sqr(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256Sqr(SB), NOSPLIT, $0-24
234c234
< TEXT <unlinkable>.p256Mul(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256Mul(SB), NOSPLIT, $0-24
401c401
< TEXT <unlinkable>.p256FromMont(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256FromMont(SB), NOSPLIT, $0-16
465c465
< TEXT <unlinkable>.p256Select(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256Select(SB), NOSPLIT, $0-24
513c513
< TEXT <unlinkable>.p256SelectAffine(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256SelectAffine(SB), NOSPLIT, $0-24
566c566
< TEXT <unlinkable>.p256OrdMul(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256OrdMul(SB), NOSPLIT, $0-24
806c806
< TEXT <unlinkable>.p256OrdSqr(SB), NOSPLIT, $0
---
> TEXT <unlinkable>.p256OrdSqr(SB), NOSPLIT, $0-24
Change-Id: I610b097c573b9d9018f0e26bc2afde5edb3f954b
Reviewed-on: https://go-review.googlesource.com/c/go/+/599875
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
