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61751 Commits

Author SHA1 Message Date
Matthieu Baerts (NGI0)
97ae1817fb net: check for MPTCP in DialTCP and ListenTCP
Setting GODEBUG=multipathtcp= [1] has no effects on apps using
ListenTCP or DialTCP directly.

According to the documentation, these functions are supposed to act like
Listen and Dial respectively:

    ListenTCP acts like Listen for TCP networks.
    DialTCP acts like Dial for TCP networks.

So when reading this, I think we should expect GODEBUG=multipathtcp= to
act on these functions as well.

Also, since #69016, MPTCP is used by default (if supported) with TCP
listeners. Similarly, when ListenTCP is used directly, MPTCP is
unexpectedly not used. It is strange to have a different behaviour.

So now, ListenTCP and DialTCP also check for MPTCP. Those are the exact
same checks that are done in dial.go, see Listen and dialSingle.

[1] https://pkg.go.dev/net#Dialer.SetMultipathTCP

Fixes #70500

Change-Id: I646431a74571668e505493fa8c1b2206bf30ed09
GitHub-Last-Rev: 69a31a1b03
GitHub-Pull-Request: golang/go#70501
Reviewed-on: https://go-review.googlesource.com/c/go/+/630715
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-11-21 22:53:35 +00:00
Roland Shoemaker
f69711434a crypto/tls: add server-side ECH
Adds support for server-side ECH.

We make a couple of implementation decisions that are not completely
in-line with the spec. In particular, we don't enforce that the SNI
matches the ECHConfig public_name, and we implement a hybrid
shared/backend mode (rather than shared or split mode, as described in
Section 7). Both of these match the behavior of BoringSSL.

The hybrid server mode will either act as a shared mode server, where-in
the server accepts "outer" client hellos and unwraps them before
processing the "inner" hello, or accepts bare "inner" hellos initially.
This lets the server operate either transparently as a shared mode
server, or a backend server, in Section 7 terminology. This seems like
the best implementation choice for a TLS library.

Fixes #68500

Change-Id: Ife69db7c1886610742e95e76b0ca92587e6d7ed4
Reviewed-on: https://go-review.googlesource.com/c/go/+/623576
Reviewed-by: Filippo Valsorda <filippo@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-11-21 22:50:04 +00:00
Sean Liao
50087aa1b4 crypto/rand: add Text for secure random strings
Fixes #67057

Change-Id: Id4a1d07bc45d9ebf90b7e6ef507002908dcfa12d
Reviewed-on: https://go-review.googlesource.com/c/go/+/627477
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
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2024-11-21 22:39:37 +00:00
Dmitri Shuralyov
0db250104c internal/copyright: skip testdata and vendor directories only
Using filepath.SkipDir without confirming that d is a directory makes
it prone to taking unintended action if a file (not a directory) with
the same name gets added.

This isn't a problem today, but we shouldn't spend human code review
time checking that this doesn't somehow happen in the future, either.

Change-Id: I29bf203ddef175c3ad23c9ddc10fa934126ac853
Reviewed-on: https://go-review.googlesource.com/c/go/+/630635
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
2024-11-21 22:36:18 +00:00
Joel Sing
dc8ceb63a8 cmd/internal/obj/riscv: rework instruction encoding information
Currently, instruction encoding is a slice of encoding types, which
is indexed by a masked version of the riscv64 opcode. Additional
information about some instructions (for example, if an instruction
has a ternary form and if there is an immediate form for an instruction)
is manually specified in other parts of the assembler code.

Rework the instruction encoding information so that we use a table
driven form, providing additional data for each instruction where
relevant. This means that we can simplify other parts of the code
by simply looking up the instruction data and reusing minimal logic.

Change-Id: I7b3b6c61a4868647edf28bd7dbae2150e043ae00
Cq-Include-Trybots: luci.golang.try:gotip-linux-riscv64
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Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
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2024-11-21 22:31:25 +00:00
Damien Neil
83e6781cb7 os: drop unnecessary trailing . from symlink targets
Adjust splitPathInRoot to match its documented behavior
of dropping . path components except at the end of the path.
This function takes a prefix, path, and suffix; previously
it would preserve a trailing . at the end of the path
even when joining to a suffix.

The practical effect of this change is that we we'll skip
a pointless open of . when following a symlink under some
circumstances:

  - open "a/target"
  - "a" is a symlink to "b/."
  - previously: we rewrite our path to "b/./target"
  - now: we rewrite our path to "b/target"

This is a fairly unimportant edge case, and our observable
behavior isn't changing. The main motivation for this change is
that the overall behavior is more comprehensible if splitPathInRoot
follows its documentation.

Change-Id: I96c6a5e3f489cdac991ba1bd702180d69625bc64
Reviewed-on: https://go-review.googlesource.com/c/go/+/630615
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-21 22:25:09 +00:00
cuishuang
a925402b62 all: fix some function names and typos in comment
Change-Id: I07e7c8eaa5bd4bac0d576b2f2f4cd3f81b0b77a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/630055
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2024-11-21 22:16:20 +00:00
Junyang Shao
154fb4e1d4 testing: Update testing.B.Loop to save benchmark results.
This is fixing some the missing logic of CL 627755.

Change-Id: I35acffef7299331fce21da4a80a26185b2e909f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/630455
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2024-11-21 22:09:32 +00:00
Damien Neil
0c6dbd99c5 os: fix Root tests on Plan9
Fixes #70484

Change-Id: I609834aca3e97bf494565da513cd2b8a83123c89
Reviewed-on: https://go-review.googlesource.com/c/go/+/630216
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-21 21:54:35 +00:00
Xiaolin Zhao
5a22174eee all: update golang.org/x/tools to v0.27.0
Commands run:
	cd $GOROOT/src/cmd
	go get golang.org/x/tools@v0.27.0
	go mod tidy
	go mod vendor

Needed for CL 623475. Introduced ABIInternal syscall support.

Change-Id: I03d7576747826243c25658f360b24ef9b84f0f04
Reviewed-on: https://go-review.googlesource.com/c/go/+/620738
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: David Chase <drchase@google.com>
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Reviewed-by: abner chenc <chenguoqi@loongson.cn>
2024-11-21 21:19:12 +00:00
Cherry Mui
a1d62aa475 hash/maphash: simplify pointer size checks
Use internal/goarch.PtrSize, instead of unsafe.Sizeof(uintptr(0)).

Change-Id: If501ae9853ed384c4b9485e2c3b0aeba03c17685
Reviewed-on: https://go-review.googlesource.com/c/go/+/630795
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2024-11-21 21:15:24 +00:00
Xiaolin Zhao
efe0a86551 cmd/compile/internal/ssa: make _gen an actual submodule and skip it in TestStdlib
After tools CL 612038, the package astutil stops being vendored, but
_gen/rulegen.go needs to import this package.
In particular, after update golang.org/x/tools, the package astutil
is deleted from the vendor directory, and got error when run TestStdlib
in longtest. So in this CL, we make _gen an actual submodule and
skip it in TestStdlib.

Change-Id: I76f77b66427f6490b4746698711a6e307ad2ba79
Reviewed-on: https://go-review.googlesource.com/c/go/+/629015
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2024-11-21 20:50:15 +00:00
Daniel McCarney
6a7733af45 crypto/pbkdf2: init package
This commit imports the x/crypto/pbkdf2 package as described in the
linked proposal. The code is unchanged with the exception of a few
small updates to reflect feedback from the proposal comment period:

* the Key function is made generic over a hash.Hash
* the h function is moved to be the first argument
* keyLen is renamed to keyLength
* an error return is added
* the unit tests were moved to the pbkdf2_test package

Updates #69488

Change-Id: If72f854daeb65a5c7fbe45ebd341e63a33340624
Reviewed-on: https://go-review.googlesource.com/c/go/+/628135
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
2024-11-21 20:38:05 +00:00
Michael Matloob
a86ea80197 cmd/go/internal/tool: set Internal.ExeName on tool's package
While the cached name of an executable is set based on the base name of
the package path, the executable produced as the output of link doesn't
have ExeName set on it and is just called a.out (with a .exe suffix on
Windows). Set ExeName so that the first time the binary is run, from the
directory link is run in, it has the right name for ps.

For #48429

Change-Id: Ic049304ec6fd5b23c2f5aaaf91aa58d79fe5a7ba
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/630695
Reviewed-by: Conrad Irwin <conrad.irwin@gmail.com>
Reviewed-by: Hongxiang Jiang <hxjiang@golang.org>
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2024-11-21 19:44:18 +00:00
Daniel McCarney
a3a31ec8ed cmd/dist: skip FIPS 140-3 testing
This will be re-enabled by an in-progress CR. For now, ignore this test
process to prevent build breakage.

Change-Id: Ica1cb1c4f9844164ab32767ce2a499021d40b997
Reviewed-on: https://go-review.googlesource.com/c/go/+/630237
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
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2024-11-21 19:02:18 +00:00
Cherry Mui
e1c3b8a490 hash/maphash: use compiler-generated hash function for Comparable
For Comparable, we can just use the compiler-generated hash
function without using reflection.

This results in some performance improvement:

                                │   old.txt    │               new.txt               │
                                │    sec/op    │   sec/op     vs base                │
Comparable/int64-8                 7.956n ± 0%   3.816n ± 3%  -52.03% (p=0.000 n=10)
Comparable/uint64-8                8.227n ± 1%   3.814n ± 0%  -53.64% (p=0.000 n=10)
Comparable/uintptr-8               7.959n ± 0%   3.814n ± 1%  -52.08% (p=0.000 n=10)
Comparable/interface_{}-8         17.480n ± 1%   5.574n ± 0%  -68.11% (p=0.000 n=10)
Comparable/string-8               27.520n ± 6%   3.714n ± 4%  -86.50% (p=0.000 n=10)
Comparable/bool-8                  8.759n ± 2%   3.978n ± 0%  -54.58% (p=0.000 n=10)
Comparable/*float64-8              7.956n ± 0%   3.815n ± 0%  -52.06% (p=0.000 n=10)
Comparable/float64-8              23.555n ± 1%   4.247n ± 4%  -81.97% (p=0.000 n=10)
Comparable/complex128-8            26.73n ± 0%   10.00n ± 0%  -62.58% (p=0.000 n=10)
Comparable/struct_{}-8             6.367n ± 2%   2.123n ± 0%  -66.66% (p=0.000 n=10)
Comparable/maphash.testStruct-8   135.60n ± 2%   15.78n ± 0%  -88.36% (p=0.000 n=10)
geomean                            15.13n        4.702n       -68.92%

Change-Id: Ie86e6d7876cf8bf44ccfbd90f64480e14451bbf8
Reviewed-on: https://go-review.googlesource.com/c/go/+/630415
Reviewed-by: Keith Randall <khr@golang.org>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2024-11-21 18:31:36 +00:00
Jayanth Krishnamurthy jayanth.krishnamurthy@ibm.com
7403a6a122 cmd/internal/obj/ppc64: support for decimal floating point instructions
1. Support for decimal arithmetic quad instructions of powerpc: DADDQ, DSUBQ, DMULQ
and DDIVQ.
2. Support for decimal compare ordered, unordered,  quad instructions of powerpc:
DCMPU, DCMPO, DCMPUQ, and DCMPOQ.
Change-Id: I32a15a7f0a127b022b1f43d376e0ab0f7e9dd108
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Reviewed-on: https://go-review.googlesource.com/c/go/+/623036
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2024-11-21 18:27:17 +00:00
Russ Cox
c37d9a0f93 cmd/link: remove debugging dreg
I left this behind accidentally.

Change-Id: I70f97b8214775e89c612890aead26431c9a443a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/630575
Auto-Submit: Russ Cox <rsc@golang.org>
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2024-11-21 16:42:42 +00:00
qiulaidongfeng
f5973c2183 cmd/go: fix -changed don`t print when GOFIPS140 is non-default
See https://github.com/golang/go/issues/70200#issuecomment-2468562595,
GOFIPS140 value when building the toolchain (off when not set)
is the default value for GOFIPS140,
it is buildcfg.defaultGOFIPS140,
export as buildcfg.DefaultGOFIPS140 that can be used in the cmd/go.

For #70200

Change-Id: I5a4873a718eeefda8e65bfab51d9d3d5ad2c21b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/629996
Reviewed-by: Michael Matloob <matloob@golang.org>
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2024-11-21 16:35:55 +00:00
Daniel McCarney
4671276c5d crypto/tls: FIPS 140-3 mode
Consolidates handling of FIPS 140-3 considerations for the tls package.
Considerations specific to certificates are now handled in tls instead
of x509 to limit the area-of-effect of FIPS as much as possible.
Boringcrypto specific prefixes are renamed as appropriate.

For #69536

Co-authored-by: Filippo Valsorda <filippo@golang.org>
Change-Id: I1b1fef83c3599e4c9b98ad81db582ac93253030b
Reviewed-on: https://go-review.googlesource.com/c/go/+/629675
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
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2024-11-21 16:34:27 +00:00
Maksym Sobolyev
21b5f2637a runtime: utilize EVFILT_USER more effectively
Re-work kqueue_event wakeup logic to use one-shot events. In an
event of waking up a wrong thread, simply re-post the event.

This saves close to 1 system call per wakeup on average, since
chances of non-blocking poller picking it up is pretty low.

Change-Id: I202d0d57a31d91ac5354ea075215f647c65790d3
GitHub-Last-Rev: e707d47326
GitHub-Pull-Request: golang/go#70408
Reviewed-on: https://go-review.googlesource.com/c/go/+/628975
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2024-11-21 16:24:21 +00:00
Russ Cox
844426104a internal/copyright: add test that copyright notices exist
We shouldn't spend human code review time checking this.
Let the computer check.

Change-Id: I6de9d733c128d833b958b0e43a52b564e8f82dd3
Reviewed-on: https://go-review.googlesource.com/c/go/+/630417
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Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
2024-11-21 16:12:09 +00:00
Russ Cox
c1a0ee3764 cmd/go: sort "no test files" test results into normal ordering
The code takes care to print test results during "go test ./..."
in the package order, delaying prints until it's that package's
turn, even when tests run in parallel. For some reason, the
prints about the test not running were not included in that,
making them print out of order. Fix that, printing that result
with the usual result printer.

This is particularly noticeable during all.bash when we start
letting cmd/dist vet packages without tests.

Change-Id: If07f9fe5a6fac2b57b24d599126b451357a164e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/630416
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2024-11-21 16:11:20 +00:00
Russ Cox
f7b15264c8 cmd/dist: vet non-test packages in short mode
Pass all packages to go test, even if they don't have test files,
so that go test can still run vet.

I just got burned by a vet error in a package without a test
showing up when I added an (unrelated) test.
There are not enough packages without tests to be worth
the "savings" of not letting the go command vet those packages.

For #60463.

Change-Id: Ib9258655151144dce6a51deeae73d651aa46cb2c
Reviewed-on: https://go-review.googlesource.com/c/go/+/630015
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2024-11-21 16:10:16 +00:00
Russ Cox
ce33585a1a cmd/dist: adjust FIPS 140 tests
An earlier CL moved the actual test from crypto/internal/fips/check
to crypto/internal/fipstest (now crypto/internal/fips140test),
so this cmd/dist check has been doing nothing for a little while.
Fix it to do what it intends.

Also run the actual crypto package tests in FIPS mode in long mode.

Change-Id: Iea8113376b95ec068a459cb8f3d0e77d3e2340f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/630116
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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2024-11-21 16:10:06 +00:00
Michael Pratt
02df9bbdbd reflect: set swissmap GroupSize
This was missed in CL 627716.

For #54766.

Change-Id: Ib987efa8abe6e89367e2e1b71a33b64ac6b01b1f
Reviewed-on: https://go-review.googlesource.com/c/go/+/630279
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Michael Pratt <mpratt@google.com>
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2024-11-21 15:52:29 +00:00
Michael Matloob
6daf022e0f cmd/go remove base.ShortPathConservative
This CL rolls forward CL 630276, fixing the issues with the longtest builders that required the revert in CL 630317.

The change this CL makes compared to CL 630276 is adding the
shortPathErrorList function to rewrite the paths in the modfile.Errors
in a modfile.ErrorList using base.ShortPath and calling it on the error
returned from modfile.Parse.

The following is the commit message from the original change:

This CL first removes the base.ShortPathConservative function. It had
two classes of uses. The first was in opening files where the paths end
up in error messages. In all those cases, the non-shortened paths are
used to open the files, and ShortPath is only used for the error
messages. The second is in base.RelPaths. RelPaths will now call
ShortPath for each of the paths passed in instead of calling
RelConservative and then doing the same check as ShortPath to see if the
path is shorter.

To avoid the possibility of incorrect relative paths ending up in error
messages (that might have command lines suggested for users to run), and
to avoid the possibility of incorrect relative paths appearing in the
output of base.RelPaths, base.ShortPaths always does an os.SameFile
check to make sure that the relative path its providing is actually
correct. Since this makes ShortPath slower than just manipulating paths
(because we need to stat the files), we need to be continue to enforce
that ShortPath is only called for error messages (with the exception of
base.RelPaths and its callers).

This is a simpler way of solving the problem that base.ShortPaths
intended to solve.

For #68383

Change-Id: Ibcefb343535bd82999916b2282e9b512bb683433
Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest,gotip-linux-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/630280
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2024-11-21 15:47:21 +00:00
Conrad Irwin
a5c1b1c433 cmd/go: cache executables for tools defined in go.mod
This allows for executables created by `go tool` to be re-used from the
cache.

Change-Id: I382672239244beb3cf6e227182f550c049de102b
Reviewed-on: https://go-review.googlesource.com/c/go/+/630339
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Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2024-11-21 15:44:19 +00:00
Damien Neil
57147256e6 os: recognize EFTYPE, EINVAL as a refusal to open a symlink
NetBSD returns EFTYPE when opening a symlink with O_NOFOLLOW.

Dragonfly seems to return EINVAL. Only check for EINVAL on Dragonfly,
since that seems like a bit of a broad net.

Change-Id: I031357816f1fe4c370373001207e65996087597f
Reviewed-on: https://go-review.googlesource.com/c/go/+/630396
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-11-21 15:20:22 +00:00
Keith Randall
0a0a7a5642 cmd/compile: fix rewrite rules for multiply/add
x - (y - c) == (x - y) + c, not (x - y) - c. Oops.

Fixes #70481

Change-Id: I0e54d8e65dd9843c6b92c543ac69d69ee21f617c
Reviewed-on: https://go-review.googlesource.com/c/go/+/630397
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Reviewed-by: Jakub Ciolek <jakub@ciolek.dev>
Auto-Submit: Keith Randall <khr@golang.org>
2024-11-21 15:06:30 +00:00
Michael Matloob
3ff868f2f5 cmd/go: cache executables built for go run
This change implements executable caching. It always caches the outputs of
link steps used by go run. To do so we need to make a few changes:

The first is that we want to cache binaries in a slightly different
location than we cache other outputs. The reason for doing so is so that
the name of the file could be the name of the program built.  Instead of
placing the files in $GOCACHE/<two digit prefix>/<hash>-d, we place them
in $GOCACHE/<two digit prefix>/<hash>-d/<executable name>. This is done
by adding a new function called PutExecutable that works differently
from Put in two ways: first, it causes the binaries to written 0777
rather than 0666 so they can be executed.  Second, PutExecutable also
writes its outputs to a new location in a directory with the output id
based name, with the file named based on p.Internal.ExeName or otherwise
the base name of the package (plus the .exe suffix on Windows).

The next changes are for writing and reading binaries from the cache. In
cmd/go/internal/work.updateBuildID, which updates build ids to the
content based id and then writes outputs to the cache, we first make the
change to always write the content based id into a binary. This is
because we won't be throwing the binaries away after running them. Then,
if the action is a link action, and we enabled excutable caching for the
action, we write the output to the binary cache.

When reading binaries, in the useCache function, we switch to using the
binary cache, and we also print the cached link outputs (which are
stored using the build action's action id).

Finally, we change go run to execute the built output from the cache.

The support for caching tools defined in a module that are run by go
tool will also use this functionality.

Fixes #69290
For #48429

Change-Id: Ic5f1d3b29d8e9786fd0d564460e3a5f53e951f41
Reviewed-on: https://go-review.googlesource.com/c/go/+/613095
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
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2024-11-21 14:52:30 +00:00
Russ Cox
28f4e14ebe crypto/internal/fips140deps: fix test for running in FIPS snapshot
In a FIPS snapshot, the import paths have a snapshot version number.
Remove that version in the test before proceeding with the usual checks.

Change-Id: I15c9d11dcac6d33330b334b8e5056c215bffa75c
Reviewed-on: https://go-review.googlesource.com/c/go/+/629977
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
2024-11-21 10:40:09 +00:00
Robert Griesemer
a2a4f00783 go/types, types2: simplify Checker.resolveBaseTypeName (cleanup)
Method receivers that denote cgo-generated types are not permitted
per issues #60725 and #57926. There's no need to collect such methods
in the first place. Simplify Checker.resolveBaseTypeName so that it
doesn't find a base type name in these cases.

Also, simplify the test case for issue #59944 and update it to use
current cgo-generated output.

For #60725.
For #57926.
For #59944.

Change-Id: I70594daebc3d4d594c5b06be138f66f8927b0e58
Reviewed-on: https://go-review.googlesource.com/c/go/+/630395
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Robert Griesemer <gri@google.com>
2024-11-21 05:01:49 +00:00
Robert Griesemer
b631b8e674 go/types, types: better error message position for invalid receiver errors
Errors related to invalid receivers are based on the receiver base type.
Position the error message at the receiver base type, not the receiver
variable.

Add an additional example with an (invalid) generic receiver type.

Also, fix a panic when the code is run w/o Alias types enabled.

Change-Id: I610df171e4c447bbe03b904937c12e4170508b3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/630376
Reviewed-by: Tim King <taking@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
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2024-11-21 05:01:47 +00:00
Ian Lance Taylor
a9428eab40 cmd/cgo/internal/testsanitizers: use t.TempDir
Change-Id: I6b2c25ab045aaec8bb6c25511b12d178d155fc25
Reviewed-on: https://go-review.googlesource.com/c/go/+/630338
Reviewed-by: Cherry Mui <cherryyz@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
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2024-11-21 02:18:27 +00:00
Ian Lance Taylor
f96987888f cmd/cgo/internal/testsanitizers: don't create fuzz corpus
The TestASANFuzz test would sometimes create a fuzz corpus
in testdata/testdata/FuzzReverse. Avoid modifying the source
directory by building the test with "go test -c" and running
it in a temporary directory.

Change-Id: I12e2da4c85165fa35e0dc1aa6b46c6d0fbccaab8
Reviewed-on: https://go-review.googlesource.com/c/go/+/630377
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2024-11-21 02:17:08 +00:00
Rhys Hiltner
adc9c45587 runtime: clean up new lock2 structure
Simplify some flow control, as suggested on https://go.dev/cl/620435.

The MutexCapture microbenchmark shows a bit of throughput improvement at
moderate levels of contention, and little change to capture and
starvation. (Note that the capture and starvation figures below are in
terms of power-of-two buckets multiplied by throughput, so they either
follow similar patterns or move by a factor of two.)

For #68578

goos: linux
goarch: amd64
pkg: runtime
cpu: 13th Gen Intel(R) Core(TM) i7-13700H
                │     old      │                 new                  │
                │    sec/op    │    sec/op     vs base                │
MutexCapture      18.21n ±  0%   18.35n ±  0%   +0.77% (p=0.000 n=10)
MutexCapture-2    21.46n ±  8%   21.05n ± 12%        ~ (p=0.796 n=10)
MutexCapture-3    22.56n ±  9%   22.59n ± 18%        ~ (p=0.631 n=10)
MutexCapture-4    22.85n ±  5%   22.74n ±  2%        ~ (p=0.565 n=10)
MutexCapture-5    22.84n ±  5%   22.50n ± 14%        ~ (p=0.912 n=10)
MutexCapture-6    23.33n ± 14%   22.22n ±  3%   -4.78% (p=0.004 n=10)
MutexCapture-7    27.04n ± 14%   23.78n ± 15%        ~ (p=0.089 n=10)
MutexCapture-8    25.44n ± 10%   23.03n ±  6%   -9.48% (p=0.004 n=10)
MutexCapture-9    25.56n ±  7%   24.39n ± 11%        ~ (p=0.218 n=10)
MutexCapture-10   26.77n ± 10%   24.00n ±  7%  -10.33% (p=0.023 n=10)
MutexCapture-11   27.02n ±  7%   24.55n ± 15%   -9.18% (p=0.035 n=10)
MutexCapture-12   26.71n ±  8%   24.96n ±  8%        ~ (p=0.148 n=10)
MutexCapture-13   25.58n ±  4%   25.82n ±  5%        ~ (p=0.271 n=10)
MutexCapture-14   26.86n ±  6%   25.91n ±  7%        ~ (p=0.529 n=10)
MutexCapture-15   25.12n ± 13%   26.16n ±  4%        ~ (p=0.353 n=10)
MutexCapture-16   26.18n ±  4%   26.21n ±  9%        ~ (p=0.838 n=10)
MutexCapture-17   26.04n ±  4%   25.85n ±  5%        ~ (p=0.363 n=10)
MutexCapture-18   26.02n ±  7%   25.93n ±  5%        ~ (p=0.853 n=10)
MutexCapture-19   25.67n ±  5%   26.21n ±  4%        ~ (p=0.631 n=10)
MutexCapture-20   25.50n ±  6%   25.99n ±  8%        ~ (p=0.404 n=10)
geomean           24.73n         24.02n         -2.88%

                │      old       │                  new                   │
                │ sec/streak-p90 │ sec/streak-p90  vs base                │
MutexCapture        76.36m ±  0%    76.96m ±   0%   +0.79% (p=0.000 n=10)
MutexCapture-2     10.609µ ± 50%    5.390µ ± 119%        ~ (p=0.579 n=10)
MutexCapture-3      5.936µ ± 93%    5.782µ ±  18%        ~ (p=0.684 n=10)
MutexCapture-4      5.849µ ±  5%    5.820µ ±   2%        ~ (p=0.579 n=10)
MutexCapture-5      5.849µ ±  5%    5.759µ ±  14%        ~ (p=0.912 n=10)
MutexCapture-6      5.975µ ± 14%    5.687µ ±   3%   -4.81% (p=0.004 n=10)
MutexCapture-7      6.921µ ± 14%    6.086µ ±  18%        ~ (p=0.165 n=10)
MutexCapture-8      6.512µ ± 10%    5.894µ ±   6%   -9.50% (p=0.004 n=10)
MutexCapture-9      6.544µ ±  7%    6.245µ ±  11%        ~ (p=0.218 n=10)
MutexCapture-10     6.962µ ± 11%    6.144µ ±   7%  -11.76% (p=0.023 n=10)
MutexCapture-11     6.938µ ±  7%    6.284µ ± 130%        ~ (p=0.190 n=10)
MutexCapture-12     6.838µ ±  8%    6.408µ ±  13%        ~ (p=0.404 n=10)
MutexCapture-13     6.549µ ±  4%    6.608µ ±   5%        ~ (p=0.271 n=10)
MutexCapture-14     6.877µ ±  8%    6.634µ ±   7%        ~ (p=0.436 n=10)
MutexCapture-15     6.433µ ± 13%    6.697µ ±   4%        ~ (p=0.247 n=10)
MutexCapture-16     6.702µ ± 10%    6.711µ ± 116%        ~ (p=0.796 n=10)
MutexCapture-17     6.730µ ±  3%    6.619µ ±   5%        ~ (p=0.225 n=10)
MutexCapture-18     6.663µ ±  7%    6.716µ ±  13%        ~ (p=0.853 n=10)
MutexCapture-19     6.570µ ±  5%    6.710µ ±   4%        ~ (p=0.529 n=10)
MutexCapture-20     6.528µ ±  6%    6.775µ ±  11%        ~ (p=0.247 n=10)
geomean             10.66µ          10.00µ          -6.13%

                │      old       │                  new                   │
                │ sec/starve-p90 │ sec/starve-p90  vs base                │
MutexCapture-2    10.609µ ±  50%    5.390µ ± 119%        ~ (p=0.579 n=10)
MutexCapture-3     184.8µ ±  91%    183.9µ ±  48%        ~ (p=0.436 n=10)
MutexCapture-4     388.8µ ± 270%    375.6µ ± 280%        ~ (p=0.436 n=10)
MutexCapture-5     807.2µ ±  83%   2880.9µ ±  85%        ~ (p=0.105 n=10)
MutexCapture-6     2.272m ±  61%    2.173m ±  34%        ~ (p=0.280 n=10)
MutexCapture-7     1.351m ± 125%    2.990m ±  70%        ~ (p=0.393 n=10)
MutexCapture-8     3.328m ±  97%    3.064m ±  96%        ~ (p=0.739 n=10)
MutexCapture-9     3.526m ±  91%    3.081m ±  47%  -12.62% (p=0.015 n=10)
MutexCapture-10    3.641m ±  86%    3.228m ±  90%  -11.34% (p=0.005 n=10)
MutexCapture-11    3.324m ± 109%    3.190m ±  71%        ~ (p=0.481 n=10)
MutexCapture-12    3.519m ±  77%    3.200m ± 106%        ~ (p=0.393 n=10)
MutexCapture-13    3.353m ±  91%    3.368m ±  99%        ~ (p=0.853 n=10)
MutexCapture-14    3.314m ± 101%    3.396m ± 286%        ~ (p=0.353 n=10)
MutexCapture-15    3.534m ±  83%    3.397m ±  91%        ~ (p=0.739 n=10)
MutexCapture-16    3.485m ±  90%    3.436m ± 116%        ~ (p=0.853 n=10)
MutexCapture-17    6.516m ±  48%    3.452m ±  88%        ~ (p=0.190 n=10)
MutexCapture-18    6.645m ± 105%    3.439m ± 108%        ~ (p=0.218 n=10)
MutexCapture-19    6.521m ±  46%    4.907m ±  42%        ~ (p=0.529 n=10)
MutexCapture-20    6.532m ±  47%    3.516m ±  89%        ~ (p=0.089 n=10)
geomean            1.919m           1.783m          -7.06%

Change-Id: I36106e1baf8afd132f1568748d1b83b797fa260e
Reviewed-on: https://go-review.googlesource.com/c/go/+/629415
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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2024-11-20 23:27:49 +00:00
Damien Neil
c315862c99 os: add OpenInRoot
For #67002

Change-Id: If919ee8a5e3d90e91c7848330762e3254245fba1
Reviewed-on: https://go-review.googlesource.com/c/go/+/629555
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-20 23:21:51 +00:00
Damien Neil
a1b5394dba os: add Root.FS
For #67002

Change-Id: Ib687c92d645b9172677e5781a3e51ef1a0427c30
Reviewed-on: https://go-review.googlesource.com/c/go/+/629518
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-20 23:21:42 +00:00
Damien Neil
3d56891969 os: add Root.Stat and Root.Lstat
For #67002

Change-Id: I0903f45dbb4c44ea0280c340c96c5f3c3c0781be
Reviewed-on: https://go-review.googlesource.com/c/go/+/627475
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
2024-11-20 23:21:29 +00:00
Damien Neil
49d24d469e os: add Root.Remove
For #67002

Change-Id: Ibbf44c0bf62f53695a7399ba0dae5b84d5efd374
Reviewed-on: https://go-review.googlesource.com/c/go/+/627076
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-20 23:21:14 +00:00
Damien Neil
43d90c6a14 os: add Root
Add os.Root, a type which represents a directory and permits performing
file operations within that directory.

For #67002

Change-Id: I863f4f1bc320a89b1125ae4237761f3e9320a901
Reviewed-on: https://go-review.googlesource.com/c/go/+/612136
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-11-20 23:20:45 +00:00
Junyang Shao
558f5372fc cmd/compile,testing: implement one-time rampup logic for testing.B.Loop
testing.B.Loop now does its own loop scheduling without interaction with b.N.
b.N will be updated to the actual iterations b.Loop controls when b.Loop returns false.

This CL also added tests for fixed iteration count (benchtime=100x case).

This CL also ensured that b.Loop() is inlined.

For #61515

Change-Id: Ia15f4462f4830ef4ec51327520ff59910eb4bb58
Reviewed-on: https://go-review.googlesource.com/c/go/+/627755
Reviewed-by: Michael Pratt <mpratt@google.com>
Commit-Queue: Junyang Shao <shaojunyang@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-11-20 23:19:48 +00:00
Russ Cox
60299c2513 cmd/go: revert "remove base.ShortPathConservative"
This reverts commit 2e07ff3543 (CL 630276).

Reason for revert: broke longtest builders.

Change-Id: I86b313cc6c1be061b408502e96a09916a6ac2c4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/630317
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2024-11-20 23:14:02 +00:00
Tobias Klauser
c94a9fdf65 os: use ignoringEINTR2 in (*Process).pidWait
This was missed in CL 627479.

Change-Id: Ibcd511573c330bf782fe6a8a50d56bb70aedf3c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/629915
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-11-20 22:54:25 +00:00
Michael Pratt
dce30a1920 cmd/compile: intrinsify swissmap match calls with SIMD on amd64
Use similar SIMD operations to the ones used in Abseil. We still
using 8-slot groups (even though the XMM registers could handle 16-slot
groups) to keep the implementation simpler (no changes to the memory
layout of maps).

Still, the implementations of matchH2 and matchEmpty are shorter than
the portable version using standard arithmetic operations. They also
return a packed bitset, which avoids the need to shift in bitset.first.

That said, the packed bitset is a downside in cognitive complexity, as
we have to think about two different possible representations. This
doesn't leak out of the API, but we do need to intrinsify bitset to
switch to a compatible implementation.

The compiler's intrinsics don't support intrinsifying methods, so the
implementations move to free functions.

This makes operations between 0-3% faster on my machine. e.g.,

MapGetHit/impl=runtimeMap/t=Int64/len=6-12                      12.34n ±  1%   11.42n ± 1%   -7.46% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=12-12                     15.14n ±  2%   14.88n ± 1%   -1.72% (p=0.009 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=18-12                     15.04n ±  6%   14.66n ± 2%   -2.53% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=24-12                     15.80n ±  1%   15.48n ± 3%        ~ (p=0.444 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=30-12                     15.55n ±  4%   14.77n ± 3%   -5.02% (p=0.004 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=64-12                     15.26n ±  1%   15.05n ± 1%        ~ (p=0.055 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=128-12                    15.34n ±  1%   15.02n ± 2%   -2.09% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=256-12                    15.42n ±  1%   15.15n ± 1%   -1.75% (p=0.001 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=512-12                    15.48n ±  1%   15.18n ± 1%   -1.94% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=1024-12                   17.38n ±  1%   17.05n ± 1%   -1.90% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=2048-12                   17.96n ±  0%   17.59n ± 1%   -2.06% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=4096-12                   18.36n ±  1%   18.18n ± 1%   -0.98% (p=0.013 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=8192-12                   18.75n ±  0%   18.31n ± 1%   -2.35% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=65536-12                  26.25n ±  0%   25.95n ± 1%   -1.14% (p=0.000 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=262144-12                 44.24n ±  1%   44.06n ± 1%        ~ (p=0.181 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=1048576-12                85.02n ±  0%   85.35n ± 0%   +0.39% (p=0.032 n=25)
MapGetHit/impl=runtimeMap/t=Int64/len=4194304-12                98.87n ±  1%   98.85n ± 1%        ~ (p=0.799 n=25)

For #54766.

Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10,gotip-linux-amd64-goamd64v3
Change-Id: Ic1b852f02744404122cb3672900fd95f4625905e
Reviewed-on: https://go-review.googlesource.com/c/go/+/626277
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2024-11-20 22:41:14 +00:00
Ian Lance Taylor
b8ba5b440b cmd/cgo: improve error message for unknown name
Fixes #70472

Change-Id: Ib50d1dd5a648afc199ed62a507d54d0b0ccb1da2
Reviewed-on: https://go-review.googlesource.com/c/go/+/630375
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2024-11-20 22:16:58 +00:00
Robert Griesemer
ae9938fae2 doc: document new restriction on cgo-generated method receicer types
Follow-up on CL 629715.

For #60725.

Change-Id: I1b980ad44f73550b633c74fc881c70255e7d8565
Reviewed-on: https://go-review.googlesource.com/c/go/+/630335
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2024-11-20 21:44:47 +00:00
Michael Pratt
cf5ec0720f cmd/compile: remove types.Compare map bucket special cases
runtime.hmap never directly refers to the bucket type (it uses an
unsafe.Pointer), thus it shouldn't be possible to have infinite
recursion here.

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Russ Cox
a947912d8a internal/byteorder: use canonical Go casing in names
If Be and Le stand for big-endian and little-endian,
then they should be BE and LE.

Change-Id: I723e3962b8918da84791783d3c547638f1c9e8a9
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2024-11-20 20:59:28 +00:00