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Commit Graph

60036 Commits

Author SHA1 Message Date
Kir Kolyshkin
2f6426834c os: make use of pidfd on linux
Use Process.handle field to store pidfd, and make use of it. Only use
pidfd functionality if all the needed syscalls are available.

1. Add/use pidfdWorks, which checks that all needed pidfd-related
   functionality works.

2. os.StartProcess: obtain the pidfd from the kernel, if possible, using
   the functionality added by CL 520266. Note we could not modify
   syscall.StartProcess to return pidfd directly because it is a public
   API and its callers do not expect it, so we have to use ensurePidfd
   and getPidfd.

3. (*Process).Kill: use pidfdSendSignal, if available and the pidfd is
   known. Otherwise, fall back to the old implementation.

4. (*Process).Wait: use pidfdWait, if available, otherwise fall back to
   using waitid/wait4. This is more complicated than expected due to
   struct siginfo_t idiosyncrasy.

NOTE pidfdSendSignal and pidfdWait are used without a race workaround
(blockUntilWaitable and sigMu, added by CL 23967) because with pidfd,
PID recycle issue doesn't exist (IOW, pidfd, unlike PID, is guaranteed
to refer to one particular process) and thus the race doesn't exist
either.

Rework of CL 528438 (reverted in CL 566477 because of #65857).

For #62654.
Updates #13987.

Change-Id: If5ef8920bd8619dc428b6282ffe4fb8c258ca224
Reviewed-on: https://go-review.googlesource.com/c/go/+/570036
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com>
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Auto-Submit: Cherry Mui <cherryyz@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2024-05-17 01:23:00 +00:00
qiulaidongfeng
69105d79ef cmd/go: unexport loadImport
Complete a TODO.

Change-Id: I39869df4d95a5a5f6019e281719b942fbf4ba7db
GitHub-Last-Rev: c664b5332e
GitHub-Pull-Request: golang/go#67091
Reviewed-on: https://go-review.googlesource.com/c/go/+/581939
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2024-05-17 00:11:59 +00:00
Jorropo
1b8117b34a cmd/compile: fix indentation level in generic.rules
Change-Id: I60a9abe72f786e18a59339df271c5521d2d1cda2
Reviewed-on: https://go-review.googlesource.com/c/go/+/555155
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Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-05-16 22:21:05 +00:00
Mauri de Souza Meneguzzo
c89318667f runtime: cleanup crashstack code
This patch removes redundant guards for the crash stack feature, as all
supported Go architectures now have a crash stack implementation.

Change-Id: I7ffb61c57955778d687073418130b2aaab0ff183
GitHub-Last-Rev: 6ff56d6420
GitHub-Pull-Request: golang/go#67202
Reviewed-on: https://go-review.googlesource.com/c/go/+/583416
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 21:49:14 +00:00
Michael Matloob
036e93ba76 cmd/go: add go telemetry command and GOTELEMETRY, GOTELEMETRYDIR
Add the go telemetry command to support setting and viewing the
telemetry mode. Also add the non-settable GOTELEMETRY and GOTELEMETRYDIR
variables to go env, which contain the mode and telemetry dir.

For #67111

Change-Id: Id7e89cefe30acfe3d865fa467315fe7cda975de9
Reviewed-on: https://go-review.googlesource.com/c/go/+/584535
Reviewed-by: Robert Findley <rfindley@google.com>
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2024-05-16 20:16:39 +00:00
Robert Griesemer
26ed0528c7 go/types, types2: report error for floating-point iteration variable
While at it, slightly improve documentation and code.
Also, add additional test cases for #66561.

Updates #66561.
Fixes #67027.

Change-Id: I682b0e9227e065d6bbd199871c2e1ecff13edc66
Reviewed-on: https://go-review.googlesource.com/c/go/+/580937
Reviewed-by: Robert Griesemer <gri@google.com>
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2024-05-16 18:56:00 +00:00
Chen.Zhidong
a523152ea1 net/http: add Pattern field in Request to return matched pattern info
Fixes #66405

Change-Id: Icd80944b6ca081aa7addd4fb85d2b3c29b6c9542
GitHub-Last-Rev: c6e32742c4
GitHub-Pull-Request: golang/go#66618
Reviewed-on: https://go-review.googlesource.com/c/go/+/574997
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
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2024-05-16 18:42:34 +00:00
Jonathan Amsterdam
06b4578160 doc/README.md: give example of package-less symbol link
Change-Id: I84d7b6aae7319cc62628a2b5ee752a0680377a15
Reviewed-on: https://go-review.googlesource.com/c/go/+/586135
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2024-05-16 18:37:47 +00:00
Mike Beaumont
78e50d0fa0 crypto/tls: don't call tlsrsakex.IncNonDefault with FIPS
We haven't called tlsrsakex.Value() yet at this point if we're using
FIPS, like if CipherSuites != nil. This adds needFIPS as a gate next to
CipherSuites != nil. FIPS specifies suites that would be skipped if
tlsarsakex were set.

Fixes #65991

Change-Id: I8070d8f43f27c04067490af8cc7ec5e787f2b9bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/582315
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Bypass: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-05-16 17:33:18 +00:00
Yoann Congal
18104621ce crypto/x509: fix certificate request creation with RSA-PSS
In case of a RSA-PSS algorithm, the hashFunc of CreateCertificateRequest
is embedded in a rsa.PSSOptions struct. Given to key.Sign(), this will
generate a proper RSA-PSS signature.

Pasted from the RSA-PSS handling code in CreateCertificate().

Fixes #45990
Fixes #65074

Change-Id: I8475afa79d8add107f092cc2871d38300e7b3903
GitHub-Last-Rev: 63fb0214c3
GitHub-Pull-Request: golang/go#55153
Reviewed-on: https://go-review.googlesource.com/c/go/+/431916
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-05-16 17:32:30 +00:00
Tobias Klauser
6ed31e3c3e net: fix typo in ctrlCtxFn parameter name
context.Context parameters are commonly named ctx, not cxt.

Change-Id: Icaadbcd38b054694959e5e8a058552a3e54be6d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/586016
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Reviewed-by: Damien Neil <dneil@google.com>
2024-05-16 16:54:32 +00:00
apocelipes
2b42ed6483 crypto: use byteorder to simplify consumeUint32 and consumeUint64
A follow-up for the recent CL 585017.

Change-Id: I9faaff7fdf62fc931fc7f64dbe238de277280730
GitHub-Last-Rev: 468d60c396
GitHub-Pull-Request: golang/go#67425
Reviewed-on: https://go-review.googlesource.com/c/go/+/586035
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
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2024-05-16 16:50:58 +00:00
Jonathan Amsterdam
4c1cc1c97f doc/next/64910.md: reword release note
Change-Id: I41a01dd2bcaf5716703946bad42830d4e8095c11
Reviewed-on: https://go-review.googlesource.com/c/go/+/586136
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 16:44:13 +00:00
Rob Findley
6a05055780 go/ast: fix bug handling the result of yield in Preorder
Once yield returns false, ast.Preorder must not call yield on any more
nodes. Even after the function passed to ast.Inspect returns false, it
may be invoked again with a non-nil node. Therefore, we must explicitly
truncate the inspection.

For #66339

Change-Id: I2b01e4e96a2d7aca785467c15ab59da13208c161
Reviewed-on: https://go-review.googlesource.com/c/go/+/585520
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-05-16 16:34:10 +00:00
Jonathan Amsterdam
db7bb2742c log/slog: handle times with undefined UnixNanos
slog tries to represent a time.Time without allocations, which involves
storing its UnixNanos value. But UnixNanos is undefined for some valid
times. Provide a fallback representation for those times by storing them
in the `any` field of `Value`.

Fixes #65902.

Change-Id: I736c739a92f77d7b1122ea0831524acdd2c4703f
Reviewed-on: https://go-review.googlesource.com/c/go/+/585519
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2024-05-16 16:12:08 +00:00
Damien Neil
505000b2d3 net/http: simplify HTTP/1 request cancelation
HTTP requests have three separate user cancelation signals:

	Transport.CancelRequest
	Request.Cancel
	Request.Context()

In addition, a request can be canceled due to errors.

The Transport keeps a map of all in-flight requests,
with an associated func to run if CancelRequest is
called. Confusingly, this func is *not* run if
Request.Cancel is closed or the request context expires.

The map of in-flight requests is also used to communicate
between roundTrip and readLoop. In particular, if readLoop
reads a response immediately followed by an EOF, it may
send racing signals to roundTrip: The connection has
closed, but also there is a response available.
This race is resolved by readLoop communicating through
the request map that this request has successfully
completed.

This CL refactors all of this.

In-flight requests now have a context which is canceled
when any of the above cancelation events occurs.

The map of requests to cancel funcs remains, but is
used strictly for implementing Transport.CancelRequest.
It is not used to communicate information about the
state of a request.

Change-Id: Ie157edc0ce35f719866a0a2cb0e70514fd119ff8
Reviewed-on: https://go-review.googlesource.com/c/go/+/546676
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-05-16 15:57:17 +00:00
Damien Neil
33d725e575 archive/zip: treat truncated EOCDR comment as an error
When scanning for an end of central directory record,
treat an EOCDR signature with a record containing a truncated
comment as an error. Previously, we would skip over the invalid
record and look for another one. Other implementations do not
do this (they either consider this a hard error, or just ignore
the truncated comment). This parser misalignment allowed
presenting entirely different archive contents to Go programs
and other zip decoders.

Fixes #66869

Change-Id: I94e5cb028534bb5704588b8af27f1e22ea49c7c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/585397
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 15:56:19 +00:00
Jes Cok
2b3d98f2ba doc: make symbol links simpler for relnotes
Change-Id: Ie8ff3d1d1398618b9a229aa3cb1ef2deaa58c3d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/586056
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 15:53:51 +00:00
Michael Matloob
643ad42d5c cmd/go/internal/envcmd: fix showing GODEBUG env value
It was accidently dropped in CL 563137

For #34208

Change-Id: I0aea93fda6260f07bc662dea92d1eabb26f82ca0
Reviewed-on: https://go-review.googlesource.com/c/go/+/586095
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2024-05-16 15:26:42 +00:00
Alan Donovan
a22cb5cabe runtime/debug: eliminate temporary variadicity from SetCrashOutput
Updates #67182

Change-Id: I33fc8c515f4a9d120262ba30f61aea80ede5e9f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/585420
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
2024-05-16 15:19:04 +00:00
qiulaidongfeng
6cd066f8b2 cmd/go: add -changed to query for non-defaults in the env
Fixes #34208

Change-Id: I8ec2d96262dcd7cbf870f6173690143c54190722
GitHub-Last-Rev: 6543df4784
GitHub-Pull-Request: golang/go#65655
Reviewed-on: https://go-review.googlesource.com/c/go/+/563137
Reviewed-by: Alan Donovan <adonovan@google.com>
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2024-05-16 14:34:32 +00:00
Alan Donovan
d367b2a475 cmd/vendor/golang.org/x/telemetry: update to 9ff3ad9
Updates #67182

Change-Id: I76b312ccbd1ea98eb2f4e3beec9e8b42e633ea5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/585819
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2024-05-16 14:32:04 +00:00
Jonathan Amsterdam
ee0bf1d1b6 doc/README.md: mention adding the proposal issue
Inform users that every accepted proposal should be mentioned
in the release notes to avoid generating a TODO.

Also, clarify instructions for the release team.

For #64169.

Change-Id: I03921739af31fc93f4b5808b2c7c98e28ad3da11
Reviewed-on: https://go-review.googlesource.com/c/go/+/584615
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 12:38:55 +00:00
Mateusz Poliwczak
722d59436b crypto/x509: add text and binary marshal methods to OID
Fixes #66249

Change-Id: I5973a19a087a35ad951e8a220d3e6e4456c7577f
GitHub-Last-Rev: 921ca8bd0c
GitHub-Pull-Request: golang/go#66599
Reviewed-on: https://go-review.googlesource.com/c/go/+/575295
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
2024-05-16 02:00:26 +00:00
Cuong Manh Le
8ce2fedaeb cmd/compile: add test case for using Alias types
CL 579935 disabled usage of Alias types in the compiler, and tracks
the problem with issue #66873. The test case in #65893 passes now
with the current tip. This CL adds a test case to ensure there is no
regression once Alias types are enabled for the compiler.

Updates #66873
Fixes #65893

Change-Id: I51b51bb13ca59549bc5925dd95f73da40465556d
Reviewed-on: https://go-review.googlesource.com/c/go/+/568455
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2024-05-16 01:45:48 +00:00
Tobias Klauser
63a0a905fa math/rand/v2: use max builtin in tests
Change-Id: I6d0050319c66fb62c817206e646e1a9449dc444c
Reviewed-on: https://go-review.googlesource.com/c/go/+/585715
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-05-16 01:44:46 +00:00
Michael Pratt
1ffc296717 runtime: always update stack bounds on cgocallback
callbackUpdateSystemStack contains a fast path to exit early without
update if SP is already within the g0.stack bounds.

This is not safe, as a subsequent call may have new stack bounds that
only partially overlap the old stack bounds. In this case it is possible
to see an SP that is in the old stack bounds, but very close to the
bottom of the bounds due to the partial overlap. In that case we're very
likely to "run out" of space on the system stack.

We only need to do this on extra Ms, as normal Ms have precise bounds
defined when we allocated the stack.

TSAN annotations are added to x_cgo_getstackbounds because bounds is a
pointer into the Go stack. The stack can be reused when an old thread
exits and a new thread starts, but TSAN can't see the synchronization
there. This isn't a new case, but we are now calling more often.

Fixes #62440.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest
Change-Id: I5389050494987b7668d0b317fb92f85e61d798ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/584597
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2024-05-16 01:32:45 +00:00
Hiroaki Nakamura
fba90c9096 cmd/go/internal/script: Fix build tags of isETXTBSY
syscall.ETXTBSY is only meaningful on Unix platforms, not on Windows.

Fixes #67356

Change-Id: I1b13292d821d61d820b396e08be9a4dd1683e843
Reviewed-on: https://go-review.googlesource.com/c/go/+/585695
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
2024-05-16 00:12:01 +00:00
Jes Cok
ae5ee7042e net/http, reflect: rename Test function names
To be consistent with other tests.

Change-Id: Ibea1d3bf57a295f024e05173d17112ce46a4f0bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/585895
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Damien Neil <dneil@google.com>
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Auto-Submit: Ian Lance Taylor <iant@google.com>
2024-05-15 23:39:44 +00:00
Michael Matloob
13d36a9b46 cmd/go: don't start upload until after toolchain selection
Run telemetry.Start (without the upload) first thing so we can increment
counters in toolchain selection. Then run telemetry.StartWithUpload
after toolchain selection so we don't start the upload until after
toolchain selection has happened so we don't start something heavyweight
before selection.

Change-Id: Ia8979175a163265c3e29f6cb11a4ada4714d1d95
Reviewed-on: https://go-review.googlesource.com/c/go/+/585419
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Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
2024-05-15 21:51:49 +00:00
Alan Donovan
7730e5b783 go/ast: add Preorder go1.23 iterator
This CL adds a new function Preorder that makes it
easier to iterate over the nodes of a syntax tree.
In particular, break, continue, and return retain
their usual continuations.

Fixes #66339

Change-Id: I438b3c23780c91ed589871ad3b8822d54e8fabc7
Reviewed-on: https://go-review.googlesource.com/c/go/+/570680
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
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2024-05-15 21:44:50 +00:00
Robert Griesemer
3c8f925606 go/types, types2: factor out type parameter access into genericType
Also, remove types2.Signature.SetTypeParams as it is not used
and does not exist in go/types.

Change-Id: I16c3ae988988d3735907e9c6c56e8626497ea405
Reviewed-on: https://go-review.googlesource.com/c/go/+/581817
Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2024-05-15 21:33:05 +00:00
Robert Griesemer
bf279b71e2 go/types, types2: add Alias.{TypeParams, SetTypeParams, TypeArgs, Origin}
Fixes #67143.

Change-Id: I8bf9c2559f95d3d6a40874454208ae074b68875c
Reviewed-on: https://go-review.googlesource.com/c/go/+/583757
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-05-15 21:32:30 +00:00
Alan Donovan
36b06c3d2f cmd/vendor/golang.org/x/telemetry: update to ac8fed8
Updates #67182

Change-Id: I14f6a35491e3a58fff2f33285bd13ac706668df6
Reviewed-on: https://go-review.googlesource.com/c/go/+/585818
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
2024-05-15 21:12:15 +00:00
Alan Donovan
3f7a030e02 runtime/debug: add SetCrashOutput(...CrashOptions) parameter
This is a placeholder for future options (e.g. JSON).

The parameter is temporarily variadic to avoid breaking
x/telemetry (see CL 585378), but I plan to remove
the "..." later this week.

Updates #67182

Change-Id: I3f6f39455d852f92902f8e3f007d3093cbe555db
Reviewed-on: https://go-review.googlesource.com/c/go/+/585557
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
2024-05-15 21:04:14 +00:00
Rob Findley
3d80761531 go/types, types2: add additional documentation for Underlying
The concept of an underlying type has become more complicated with the
addition of TypeParam and Alias types. Update the documentation to
clarify that it strips off Named, TypeParam, and Alias types, and to
reference the spec.

Fixes #65774

Change-Id: I40a8efe15b45591b95068acbf4ef9eae17a4cef1
Reviewed-on: https://go-review.googlesource.com/c/go/+/585456
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
2024-05-15 20:03:31 +00:00
Cherry Mui
c4772d30bf cmd/link: disallow pull-only linknames
As mentioned in CL 584598, linkname is a mechanism that, when
abused, can break API integrity and even safety of Go programs.
CL 584598 is a first step to restrict the use of linknames, by
implementing a blocklist. This CL takes a step further, tightening
up the restriction by allowing linkname references ("pull") only
when the definition side explicitly opts into it, by having a
linkname on the definition (possibly to itself). This way, it is at
least clear on the definition side that the symbol, despite being
unexported, is accessed outside of the package. Unexported symbols
without linkname can now be actually private. This is similar to
the symbol visibility rule used by gccgo for years (which defines
unexported non-linknamed symbols as C static symbols).

As there can be pull-only linknames in the wild that may be broken
by this change, we currently only enforce this rule for symbols
defined in the standard library. Push linknames are added in the
standard library to allow things build.

Linkname references to external (non-Go) symbols are still allowed,
as their visibility is controlled by the C symbol visibility rules
and enforced by the C (static or dynamic) linker.

Assembly symbols are treated similar to linknamed symbols.

This is controlled by -checklinkname linker flag, currently not
enabled by default. A follow-up CL will enable it by default.

Change-Id: I07344f5c7a02124dbbef0fbc8fec3b666a4b2b0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/585358
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2024-05-15 19:57:43 +00:00
Cherry Mui
849770dec9 cmd/compile: disallow linkname referring to instantiations
Linknaming an instantiated generic symbol isn't particularly
useful: it doesn't guarantee the instantiation exists, and the
instantiated symbol name may be subject to change. Checked with a
large code corpus, currently there is no occurrance of linkname
to an instantiated generic symbol (or symbol with a bracket in its
name). This also suggests that it is not very useful. Linkname is
already an unsafe mechanism. We don't need to allow it to do more
unsafe things without justification.

Change-Id: Ifaa20c98166b28a9d7dc3290c013c2b5bb7682e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/585458
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2024-05-15 19:27:25 +00:00
Alan Donovan
bf0b605dfb runtime: make convTstring write barrier unreachable from throw
CL 581215 changed 'throw' so that instead of print(s) it called
a more complicated function, printpanicval, that statically
appeared to have convTstring in its call graph, even though this
isn't dynamically reachable when called with a string argument.

However, this caused the link-time static callgraph test to point
out that throw (which is called in nowritebarrierrec contexts
such as markgc) reaches a write barrier.

The solution is to inline and specialize the printpanicval
function for strings; it reduces to printindented.

Thanks to mpratt for pointing out that the reachability
check is on the fully lowered code, and is thus sensitive
to optimizations such as inlining.
I added an explanatory comment on the line that generates
the error message to help future users confused as I was.

Fixes golang/go#67274

Change-Id: Ief110d554de365ce4c09509dceee000cbee30ad9
Reviewed-on: https://go-review.googlesource.com/c/go/+/584617
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2024-05-15 17:29:46 +00:00
Michael Matloob
90b1521138 cmd/go/internal/modload: compute direct in workspace mode
The Requirements structure, which represents the root level requirements
of the module graph also has a 'direct' field which contains the set of
direct dependencies of a module.

Before this change, in workspace mode, the direct field was not set on
the Requirements structure. This change sets direct in the two places
it's needed: when initializing Requirements from the workspace's mod
files and when updating Requirements based on imports.

When initializing Requirements from the workspace's mod files, this
change will use the 'indirect' comments in those mod files to record the
set of direct modules passed to the Requirements.

There is a loop in updateRequirements where we consider the imports of
the packages we loaded from the main module to make sure that all those
imported packages' modules are required.  The loop also updates direct
for each of those modules (which have at least one package directly
imported by the main modules).  Before this change, in the workspace
case we continued early from the loop and didn't proceed to the code
where direct is computed. This change fixes that.

Fixes #66789

Change-Id: I2b497fbf28c2197e8ba8e8ca5314c1a720f16364
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/580256
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2024-05-15 16:04:44 +00:00
David Chase
18d0e6a14f cmd/compile, cmd/internal: fine-grained fiddling with loop alignment
This appears to be useful only on amd64, and was specifically
benchmarked on Apple Silicon and did not produce any benefit there.
This CL adds the assembly instruction `PCALIGNMAX align,amount`
which aligns to `align` if that can be achieved with `amount`
or fewer bytes of padding. (0 means never, but will align the
enclosing function.)

Specifically, if low-order-address-bits + amount are
greater than or equal to align; thus, `PCALIGNMAX 64,63` is
the same as `PCALIGN 64` and `PCALIGNMAX 64,0` will never
emit any alignment, but will still cause the function itself
to be aligned to (at least) 64 bytes.

Change-Id: Id51a056f1672f8095e8f755e01f72836c9686aa3
Reviewed-on: https://go-review.googlesource.com/c/go/+/577935
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2024-05-15 15:44:14 +00:00
Matthew Dempsky
31c8150082 cmd/compile/internal/noder: enable type aliases in type checker
This CL fixes an initialization loop during IR construction, that
stems from IR lacking first-class support for aliases. As a
workaround, we avoid publishing alias declarations until the RHS type
expression has been constructed.

Thanks to gri@ for investigating while I was out.

Fixes #66873.

Change-Id: I11e0d96ea6c357c295da47f44b6ec408edef89b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/585399
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
2024-05-15 15:09:14 +00:00
Kir Kolyshkin
c3c97ad1bf run.bash: rm bumping open files soft limit
Since CL 393354 this should no longer be necessary.

Change-Id: Ie9a7f779515aaf8b40a4f0083ba680f7b0231f04
Reviewed-on: https://go-review.googlesource.com/c/go/+/585576
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>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2024-05-15 15:02:23 +00:00
Cherry Mui
27603028eb cmd/internal/obj/x86: make SEH symbols content-addressable
Currently, the SEH symbol is defined as an aux symbol of the
function symbol, without adding to ctxt.Data. Each function has
its own SEH symbol. As there are a lot of duplications of the
SEH symbol contents, currently a Go object file may contain many
copies of identical SEH symbols. They are deduplicated at link
time. But it does make the linker do redundant work, and make it
hard to reason about the SEH symbol writing in the object file
writer, and its resolution in the linker. In fact, in the object
file writer, the same SEH symbol may be added to the ctxt.defs
multiple times (as it is the aux of multiple function symbols),
which is not expected.

In fact, "aux symbol" is just a mechanism to associate auxiliary
data to another symbol. The auxiliary data symbol itself can be an
ordinary data symbol, even a content-addressable symbol. Define
the SEH symbol as a conntent-addressable symbol and add it to
ctxt.Data. This way there is only one definition of each unique
SEH symbol, which can be the aux of many functions.

While here, add a check to ensure that we add a symbol at most
once to the defs list.

Change-Id: Ie7a0cf02ca114060423e025931b30de97ca330fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/585656
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2024-05-15 14:41:10 +00:00
Cherry Mui
8056540772 cmd/internal/obj: print symbol index at -S=3
When the compiler or assembler's -S flag is set to 3 or higher,
print the symbol index, for debugging.

Change-Id: Ia7a42b0c017105ef12fd97b3e52de0e155b0cf2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/585655
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2024-05-15 14:39:06 +00:00
Paul E. Murphy
408739fc96 cmd/compile,cmd/asm: on PPC64, generate compares against constant 0
Merge the handling of CMPx r,r,cr and CMPx r,i,cr when assembling.

This prevents generating machine code like cmpd rx,r0 when cmpdi rx,0
is preferred. The preferred form can be fused on Power10 for faster
execution of some instruction sequences.

Likewise, update a common case to use $0 instead of R0 to take
advantage of this.

Change-Id: If2549ca25a5f7d23001885ad444c70d829b3b066
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10,gotip-linux-ppc64_power8,gotip-linux-ppc64le_power10,gotip-linux-ppc64le_power8,gotip-linux-ppc64le_power9
Reviewed-on: https://go-review.googlesource.com/c/go/+/585137
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2024-05-15 13:55:28 +00:00
Russ Cox
6ccd8e4cf6 cmd/go: add support for godebug lines in go.mod and go.work
The fact that the go line sets both the language version and the
GODEBUG compatibility version can be a problem, especially since
the go line is also required to be ≥ the go lines of any required
dependency modules.

This change adds a new 'godebug' line to go.mod and go.work
to allow setting the GODEBUG values for the entire module.

It also adds a new meta-value default=go1.21 that means
take the defaults from Go 1.21 no matter what the go line says.

These were discussed in proposal #65573.

Fixes #65573.

Change-Id: I91746322a10178370ed1015ce5278372a024c824
Reviewed-on: https://go-review.googlesource.com/c/go/+/584476
Auto-Submit: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2024-05-15 13:52:10 +00:00
Paul E. Murphy
0222a028f1 cmd/compile/internal/ssa: combine more shift and masking on PPC64
Investigating binaries, these patterns seem to show up frequently.

Change-Id: I987251e4070e35c25e98da321e444ccaa1526912
Reviewed-on: https://go-review.googlesource.com/c/go/+/583302
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2024-05-15 13:27:41 +00:00
Russ Cox
bbdad50c09 doc/godebug: correct gotypealias=1 deprecation
Per the note earlier in the page, GODEBUGs are maintained for a
minimum of two years (four Go releases). Not said but certainly
implied is that they are maintained for four Go releases from the
point where people started needing to use them.

Since people would start needing gotypesalias=0 in Go 1.23,
it can be removed in Go 1.27.

Change-Id: Ifad63a1fff63c3f96f2ee192ca74bd1ce8bdb61f
Reviewed-on: https://go-review.googlesource.com/c/go/+/585457
Auto-Submit: Russ Cox <rsc@golang.org>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Eli Bendersky <eliben@google.com>
2024-05-15 12:20:56 +00:00
Michael Stapelberg
d05af62695 syscall: skip TestAmbientCapsUserns when restricted, document
fixes golang/go#67088

Change-Id: I42e7a8d02b161187772f147e3e136ab6e0f71d7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/585059
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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2024-05-15 07:45:37 +00:00