1
0
mirror of https://github.com/golang/go synced 2024-11-24 21:50:11 -07:00
Commit Graph

51648 Commits

Author SHA1 Message Date
Robert Griesemer
20c300bc70 spec: the type of a constant cannot be a type parameter
Add corresponding rules and a couple of examples.

Fixes #50202.

Change-Id: I4287b5e2d0fd29a0c871795e07f1bb529c9c6004
Reviewed-on: https://go-review.googlesource.com/c/go/+/384240
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-09 21:50:10 +00:00
Robert Griesemer
5d3476c3db spec: use "core type" rather than "structural type"
This change in terminology prevents potential confusion
that migth be caused by associating "structural type"
with "structural typing"; the two are not connected.

Also, adjusted introductory paragraph of section on
constraint type inference: type inference goes in both
directions, from type parameter to core type and vice
versa. The previous description was not quite accurate.

Change-Id: If4ca300f525eea660f68486302619aa6ad5dbc2c
Reviewed-on: https://go-review.googlesource.com/c/go/+/384238
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-09 21:50:07 +00:00
Eric Lagergren
9ed0d81fb5 crypto/aes: fix key size typo
AES-196 does not exist, but AES-192 does.

Signed-off-by: Eric Lagergren <eric@ericlagergren.com>
Change-Id: I8c9ac67735e99e5b2ee7fb9824029c1164221153
Reviewed-on: https://go-review.googlesource.com/c/go/+/384374
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
2022-02-09 21:39:49 +00:00
Carlos Amedee
a3aed62512 doc/go1.18: update Go 1.18 release note TODOs using relnote
For #47694.

Change-Id: I5f6850e171f574a5342671778df854dc68a5148f
Reviewed-on: https://go-review.googlesource.com/c/go/+/384554
Trust: Carlos Amedee <carlos@golang.org>
Run-TryBot: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Alex Rakoczy <alex@golang.org>
Trust: Alex Rakoczy <alex@golang.org>
Run-TryBot: Alex Rakoczy <alex@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-09 21:15:07 +00:00
Bryan C. Mills
846c06d33b net: fix a race in TestLookupContextCancel
If the actual DNS lookup in LookupIPAddr completes quickly enough,
it may succeed even if the passed-in Context is already canceled.
That would (rarely) cause TestLookupContextCancel to fail due to an
unexpectedly-nil error.

This change uses the existing testHookLookupIP hook to delay the
cancellation until the lookup has started (to try to provoke the code
path for which the test was added), and then block the lookup result
until LookupIPAddr has noticed it.

Fixes #51084
Updates #22724

Change-Id: I331ac61a652ac88f6d4c85bf62466237b76d53ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/384237
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-09 20:12:16 +00:00
Bryan C. Mills
9cec77ac11 runtime/debug: replace (*BuildInfo).Marshal methods with Parse and String
Since a String method cannot return an error, escape fields that may
contain unsanitized values, and unescape them during parsing.

Add a fuzz test to verify that calling the String method on any
BuildInfo returned by Parse produces a string that parses to the same
BuildInfo. (Note that this doesn't ensure that String always produces
a parseable input: we assume that a user constructing a BuildInfo
provides valid paths and versions, so we don't bother to escape those.
It also doesn't ensure that ParseBuildInfo accepts all inputs that
ought to be valid.)

Fixes #51026

Change-Id: Ida18010ce47622cfedb1494060f32bd7705df014
Reviewed-on: https://go-review.googlesource.com/c/go/+/384154
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2022-02-09 19:44:03 +00:00
Meng Zhuo
be0d049a42 runtime: AES maphash scramble 3 times on 386
Issue #43130 shows flaky hash not inbalanced on 386 platform,
which is using AES hashing instead of wyhash.
This CL increase the scramble times to 3 that amd64 using right now.

Fixes #43130

Change-Id: I9d012eda99ff71c13a89448f46fcb9c5e7cec921
Reviewed-on: https://go-review.googlesource.com/c/go/+/384075
Trust: mzh <mzh@golangcn.org>
Run-TryBot: mzh <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2022-02-09 06:35:15 +00:00
Robert Griesemer
255acb0c05 doc/go1.18: document behavior of go/types predicates for extended interfaces
For #47694.

Change-Id: Ic27193b65ef4b3c0c932107b8731b5f8d3190ad5
Reviewed-on: https://go-review.googlesource.com/c/go/+/383918
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-09 05:39:47 +00:00
Cherry Mui
e4ca3fa345 cmd/dist: test cgo internal linking on darwin-arm64
CL 383554 disables testing cgo internal linking on all ARM64 but
Windows, because it doesn't work with newer GCC. But
- darwin-arm64 works, and it does not use GCC
- we don't support cgo internal linking on windows-arm64 anyway.

This CL fixes the condition.

Change-Id: I9eb7b81ef75e482f5e95d2edae4863ba21396432
Reviewed-on: https://go-review.googlesource.com/c/go/+/384269
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-08 23:46:01 +00:00
Sean Liao
6749dd40b3 net/smtp: match actual behavior for Auth.Start
Looking at history, it appears to never have worked as documented.

Fixes #48759

Change-Id: I066307c28e3ed1875c1c4049bade62e2818dd400
Reviewed-on: https://go-review.googlesource.com/c/go/+/383998
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
2022-02-08 23:39:48 +00:00
Adrian Hesketh
0b7e586e48 os: add examples for Mkdir and MkdirAll
Provides example using value for the perm argument that matches the value set by the mkdir command on MacOS and Linux.

Change-Id: I98d9ac9668de4dc0efde2484f5b00d005628ac9e
GitHub-Last-Rev: 44e617912f
GitHub-Pull-Request: golang/go#50641
Reviewed-on: https://go-review.googlesource.com/c/go/+/378874
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
2022-02-08 23:38:05 +00:00
Robert Griesemer
c5bce7445e go/types, types2: AssertableTo is undefined for generalized interfaces
Document that AssertableTo is undefined (at least for 1.18) if
the first argument is a generalized interface; i.e., an interface
that may only be used as a constraint in Go code.

Still, implement it as we might expect it to be defined in the
future, to prevent problems down the road due to Hyrum's Law.

While at it, also removed the internal flag forceStrict and its
one use in Checker.assertableTo; forceStrict was never enabled
and if it would have been enabled, the behavior would not have
been correct.

Change-Id: Ie4dc9345c88d04c9640f881132154a002db22643
Reviewed-on: https://go-review.googlesource.com/c/go/+/383917
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-08 23:29:18 +00:00
Cherry Mui
0cbe3e00d8 runtime: fix an error message in TestCrashDumpsAllThreads
Change-Id: I04962c836fd448378b8bf071ba848f3b24253dce
Reviewed-on: https://go-review.googlesource.com/c/go/+/384159
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-08 22:39:05 +00:00
Ian Lance Taylor
5442f4d51b runtime: restore old mp.fastrand initialization
CL 337350 changed mp.fastrand from a [2]uint32 to a uint64 and changed
the initialization to a single call of int64Hash. However, int64Hash
returns uintptr, so 32-bit systems this always left the most
significant 32 bits of mp.fastrand initialized to 0. The new code also
did not protect against initializing mp.fastrand to 0, which on a
system that does not implement math.Mul64 (most 32-bit systems) would
lead fastrand to always return 0.

This CL restores the mp.fastrand initialization to what it was before
CL 337350, adjusted for the change from [2]uint32 to uint64.

Change-Id: I663b415d9424d967e8e665ce2d017604dcd5b204
Reviewed-on: https://go-review.googlesource.com/c/go/+/383916
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-08 22:26:40 +00:00
Ian Lance Taylor
540632841e bytes, strings: mention Cut in docs for Split and SplitN
For #46336

Change-Id: Idc23302085e14e24d571f5995d6d33ca964a0021
Reviewed-on: https://go-review.googlesource.com/c/go/+/382954
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2022-02-08 22:25:54 +00:00
Robert Griesemer
3e514a0103 spec: explicitly define integer, floating-point, and complex types
The terms "integer type", "floating-point type", and "complex type"
are used frequently in the spec but are not explicitly (only indirectly)
defined.

Slightly rephrased the section on numeric types and introduce these
terms explicitly. Add links to this section.

Change-Id: I3fb888933bece047da8b356b684c855618e9aee4
Reviewed-on: https://go-review.googlesource.com/c/go/+/384157
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-08 22:16:52 +00:00
Ian Lance Taylor
f524a2baa4 builtin: clarify that interface types do not implement comparable
Fixes #51083

Change-Id: Ic9207ae4104b06749925186e0eb4f18edf1b5007
Reviewed-on: https://go-review.googlesource.com/c/go/+/384235
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2022-02-08 21:59:36 +00:00
Bryan C. Mills
275aedccd4 runtime: skip TestGdbBacktrace flakes matching a known GDB internal error
TestGdbBacktrace occasionally fails due to a GDB internal error.
We have observed the error on various linux builders since at least
October 2020, and it has been reported upstream at least twice.¹²

Since the bug is external to the Go project and does not appear to be
fixed upstream, this failure mode can only add noise.

¹https://sourceware.org/bugzilla/show_bug.cgi?id=24628
²https://sourceware.org/bugzilla/show_bug.cgi?id=28551

Fixes #43068

Change-Id: I6c92006a5d730f1c4df54b0307f080b3d643cc6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/384234
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-08 21:57:24 +00:00
pierwill
1fe8f47cc3 cmd/compile: correct doc comment name for OrderedOrEqual
Change-Id: I9ac2565f8d39a30c5f10d924a934441b30e12e98
GitHub-Last-Rev: 6943ac4ac5
GitHub-Pull-Request: golang/go#50983
Reviewed-on: https://go-review.googlesource.com/c/go/+/382459
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
2022-02-08 21:31:01 +00:00
Bryan C. Mills
9e0de1fe7b cmd/go: remove deleted subdirectories in 'go work use'
Also remove absolute names (relative to PWD) when updating relative
directories, and relative names when updating absolute directories.

Fixes #50959

Change-Id: If129019cad7146e82face7f23427b28240d29cfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/383837
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-08 19:03:52 +00:00
Daniel Martí
ef06a5f44a misc/reboot: don't use symlinks when copying GOROOT/src
go:embed disallows using symlinked files by design.
crypto/elliptic is the first std package to use it as of CL 380475,
and unfortunately that broke the TestRepeatBootstrap long test.

The reason it uses symlinks is for speed; it wants to copy GOROOT/src,
but regular files aren't going to be modified in any way,
so a symlink, if supported, means not needing to copy the contents.

Replace the symlink attempt with hard links,
which will mean regular files remain as such, fixing go:embed.
It's worth noting that on many systems hard links won't work,
as the temporary filesystem tends to be separate,
but it doesn't hurt to try.

In my system, where /tmp is tmpfs, the test now copies more bytes.
With the added Logf, I can see overlayDir goes from ~30ms to ~100ms.
This makes sense, as GOROOT/src currently weighs around 100MiB.
To alleviate that slow-down, stop copying testdata directories,
as they currently weigh around 20MiB and aren't needed for the test.
This gets overlayDir on my system down to an acceptable ~70ms.

I briefly considered teaching overlayDir what files can be symlinks,
but that seemed fairly complex long-term, as any file could be embedded.

While here, start using testing.T.TempDir and fs.WalkDir.

For #50995.

Change-Id: I17947e6bdee96237e1ca0606ad0b95e7c5987bc1
Reviewed-on: https://go-review.googlesource.com/c/go/+/383995
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-08 15:30:12 +00:00
Daniel Martí
c856fbf361 crypto/elliptic: use go:embed for the precomputed p256 table
go.dev/cl/339591 changed the code generation to use a constant string,
so that the ~88KiB table can be marked read-only.

The compiled code became a lot better, but unfortunately,
the generated Go source became significantly more inefficient.
The numbers below compare "gofmt -l" and "go tool compile" of said file,
where "old" is the file as of Go 1.17, and "new" as of master in 2022/01/19:

	name           old time/op         new time/op         delta
	Gofmt                 22.8ms ± 6%        898.5ms ± 3%  +3837.32%  (p=0.000 n=8+8)
	GoToolCompile         26.9ms ± 2%        371.1ms ± 2%  +1278.36%  (p=0.000 n=7+8)

	name           old user-time/op    new user-time/op    delta
	Gofmt                 25.7ms ±65%        897.1ms ± 3%  +3383.86%  (p=0.000 n=8+8)
	GoToolCompile         35.1ms ±26%        367.2ms ± 3%   +945.80%  (p=0.000 n=8+8)

	name           old sys-time/op     new sys-time/op     delta
	Gofmt                6.42ms ±276%         7.23ms ±38%       ~     (p=0.412 n=8+6)
	GoToolCompile        9.20ms ±100%        13.90ms ±53%       ~     (p=0.105 n=8+8)

	name           old peak-RSS-bytes  new peak-RSS-bytes  delta
	Gofmt                 9.11MB ± 7%        22.79MB ± 1%   +150.23%  (p=0.000 n=8+8)
	GoToolCompile         25.1MB ± 2%         68.6MB ± 2%   +173.57%  (p=0.000 n=8+8)

"+" operators are binary expressions at the syntax tree level,
which are represented by packages like go/ast as roughly:

	struct {
		X  Expr
		Op Token
		Y  Expr
	}

Since each node is a pointer, chains of "+" operators act like linked lists.
The generated code has about 14k lines, and 8 "+" operators per line,
meaning that we end up with a linked list with over 11k elements.

This explains the slow-down in gofmt; the printer must walk said list,
and it does so more than once to work out how to format it.
It seems like the compiler is similarly affected by the huge length.

To remedy the effect of the linked list, use go:embed instead.
This results in the same string variable with the binary table,
but it greatly reduces the amount of syntax and its cost above.
We still keep the generator around, but modified so it produces the
binary file to be embedded rather than a large Go file.

Finally, we update go/build/deps_test.go to allow crypto/elliptic to
depend on embed; it's a tiny package and crypto/elliptic was already
manually embedding assets via code generation.
The change to deps_test.go was briefly discussed in the issue below.

Fixes #50995.

Change-Id: I0c8b432710e971a296a2e9c99147cc2cad9662aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/380475
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
2022-02-08 08:41:09 +00:00
Josh Bleecher Snyder
69e1711f28 doc/go1.18: mention linker improvements
Change-Id: I12cad608448ddd17a5da2b1d1209007102d892a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/383914
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-07 23:45:09 +00:00
Robert Findley
911c78fe54 go/parser: fix incorrect resolution of receiver type parameters
Declare receiver type parameters in the function scope, but don't
resolve them (for now), as ast.Object.Decl is not documented to hold
*ast.Idents. This avoids incorrect resolution of identifiers to names
outside the function scope.

Also make tracing and error reporting more consistent.

For golang/go#50956

Change-Id: I8cd61dd25f4c0f6b974221599b00e23d8da206a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/382247
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-07 21:57:29 +00:00
Robert Griesemer
7db75b368d go/types, types2: ensure we have an interface before checking constraints
Due to delayed computation of constraint type sets it is possible that
a type argument is checked against a constraint before that constraint
has been wrapped into an implicit interface (if needed).

When the type checker is about to check whether a type argument
implements a constraint, it's always safe to force wrapping of
a constraint in an implicit interface (if necessary) before doing
the implements check.

Also, use a better position for tracing output related to constraint
type set computation.

Fixes #51048.

Change-Id: I52fecbf57814f09b62762452d7e17c2a230fdd59
Reviewed-on: https://go-review.googlesource.com/c/go/+/383834
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-07 21:00:02 +00:00
Robert Griesemer
49030c87e0 go/types, types2: record correct argument type for cap, len
Record the actual argument type for a cap/len call, not the
underlying type.

Fixes #51055.

Change-Id: Ia0e746a462377f030424ccaec0babf72b78da420
Reviewed-on: https://go-review.googlesource.com/c/go/+/383474
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-07 20:21:30 +00:00
Ian Lance Taylor
8f374aa27f runtime: don't assume that 0.25 * 100 is representable as int
For the gofrontend, it's not; there are some trailing one bits,
which is permitted by the spec.

Change-Id: I58f5a5347068bb488306ec8e73da7c59376f1ae1
Reviewed-on: https://go-review.googlesource.com/c/go/+/383635
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2022-02-07 18:19:38 +00:00
Ian Lance Taylor
fa04846404 doc/go1.18: mention new x/exp generic packages
Change-Id: I119cfb1a0da9af89ced78935b8fcdfdb8d9b4ab6
Reviewed-on: https://go-review.googlesource.com/c/go/+/383794
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2022-02-07 18:09:07 +00:00
Bryan C. Mills
3c4c10ea8c misc/cgo: fix aliasing bugs in parallel tests that append to shared slices
These tests use a slice to represent the base C compiler command (with
flags). Appending to that slice can cause subtle aliasing bugs, such
as commands that silently corrupt the arguments of other concurrent
commands in parallel tests.

In this change, we explicitly reduce the capacity of the command slice
to force appends to it to always allocate unique new slices.

Fixes #49693

Change-Id: Ide466bf65f12cb6cead3dcba69f513cccb60a160
Reviewed-on: https://go-review.googlesource.com/c/go/+/383754
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-07 17:51:57 +00:00
Than McIntosh
867a3d5502 test: apply GO_TEST_TIMEOUT_SCALE scaling to test timeouts
Change run.go to apply the GO_TEST_TIMEOUT_SCALE scaling factor to
test timeouts (mentioned in "-t" clause in test header).

Also with this patch, bump up the timeout for fixedbugs/issue46234.go
from 30 to 45 seconds, to avoid flakes on very slow builders.

Updates #50973.

Change-Id: Icbafa482860e24cc1e72fee53511bcc764d06bf1
Reviewed-on: https://go-review.googlesource.com/c/go/+/382774
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-07 12:32:51 +00:00
Ian Lance Taylor
334a591a3f os: don't repeat dir argument in CreateTemp error
The dir argument is already in prefix, we shouldn't add it again.

Change-Id: I42a158bec3a43950fce24f57b808da3ad8c5ef5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/383636
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2022-02-07 07:14:28 +00:00
Benny Siegert
1d6051380c cmd/dist: skip internal linking tests on arm64
The previous workaround for issue #39466 only disabled this test for
Linux. However, the issue manifests for all arm64 systems with gcc 9.4
and above. The new netbsd-arm64 builder uses NetBSD-current with gcc
10.3, so it fails in the same way.

Updates #39466

Change-Id: I276a99a5e60914e5c22f74a680e461bea17cfe92
Reviewed-on: https://go-review.googlesource.com/c/go/+/383554
Trust: Benny Siegert <bsiegert@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-02-07 06:38:18 +00:00
Ian Lance Taylor
d588f48770 runtime: change sys.PtrSize to goarch.PtrSize in comments
The code was updated, the comments were not.

Change-Id: If387779f3abd5e8a1b487fe34c33dcf9ce5fa7ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/383495
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-05 06:14:58 +00:00
Robert Griesemer
7c9885def5 go/types, types2: use identical missingMethod in both type checkers
Further simplify and regularize Checker.missingMethod and use the
same code in both type checkers.

This enables case-folding lookup for go/types.

Adjusted test case that looks for alternative methods.

Change-Id: I5b8cc598c295c329ff93b1c65787cc6140f0900e
Reviewed-on: https://go-review.googlesource.com/c/go/+/382858
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:58 +00:00
Robert Griesemer
aadbfc30af go/types, types2: always use missingMethodReason in checker.Implements
Remove special case where we don't have a *Checker and always use
Checker.missingMethodReason in Checker.implements.

Look for zero methods rather than empty interface to exit early
from Checker.missingMethod, and remove the extra test in
Checker.implements.

With this change we get consistent and more detailed error messages
from all places where we do a form of the "implements" test.

To make this possible, allow for the receiver to be nil in
- Checker.sprintf
- Checker.missingMethodReason
- Checker.interfacePtrError
- Checker.funcString

Allowing Checker.sprintf with nil Checker permits further simplifying
in a couple of places.

Change-Id: I0ea7178c9efbcd4a25ded2a66e2b058db52dc4d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/383054
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:54 +00:00
Robert Griesemer
f1903fd4ec go/types, types2: simplify Checker.typeAssertion, use same code in both type checkers
- Remove the xtyp argument from the Checker.typeAssertion parameter
  list; it was confusing and not needed. Adjusted call sites.

- Simplify logic in Checker.typeAssertion.

- Use the same code in both types2 and go/types, specifically
  use the same error positions.

- Adjust error messages as needed.

This removes another subtle discrepancy between types2 and go/types.
The go/types error messages don't have the have/want appendix for
the affected error messages yet because we don't use case folding
in lookups yet.

Change-Id: Id39f5c473da36c9baad60082f85cf1f34dc26c50
Reviewed-on: https://go-review.googlesource.com/c/go/+/383014
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:50 +00:00
Robert Griesemer
ef843ae49c go/types, types2: simplify missingMethodReason
Added a funcString helper so we don't need to rewrite strings
with strings.Replace.

Use compiler format for error message about wrong method type;
this removes another unnecessary variation.

Simplify conditions for pointer-to-interface related error:
if one of the involved types is an interface pointer, it can't
have any methods.

Rewrite logic so we don't need all the else-if branches.

Adjusted a test case for types2 accordingly. The go/types version
of this test case has a different error because the implementation
of Checker.typeAssertion is different in the two type checkers
(the types2 version gives errors closer to the 1.17 compiler).

Change-Id: I19e604d7063c3e31e8290bd78384a9f38bb0d740
Reviewed-on: https://go-review.googlesource.com/c/go/+/382694
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:47 +00:00
Robert Griesemer
d9eba71a64 go/types, types2: fix bug in types2.MissingMethod
Because Checker.missingMethod also looks up methods matching
matching case-folded names, when Checker.missingMethod returns
an alternative method, that method does not automatically have
the wrong type. It may be a method with a different name.

Adjust types2.MissingMethod to check the alternative method
name before reporting a wrong type.

Add API test that verifies (now correct) behavior for this
case.

Ported the code also to go/types, though it was not a bug
there yet because looking up with case-folding is not yet
enabled.

Change-Id: Iaa48808535c9265a9879338ea666c6c021e93a2b
Reviewed-on: https://go-review.googlesource.com/c/go/+/382634
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:43 +00:00
Robert Griesemer
727790a2fd go/types, types2: remove superflous type parameter length checks
There is no need to check for length equality of type parameter
lists in Checker.missingMethod: the Identical predicate does
this check. Furthermore, we don't have methods with their own
type parameters. Remove the unnecessary (duplicate) code.

Also, update doc string on missingMethod and rename the 2nd
result parameter for clarity, and clarify internal comments.

For go/types, include the same case-folding code as for types2
but leave it disabled or now. Adjust any other differences in
the missingMethod implementation.

With this change, the types2 and go/types code of missingMethod
is identical again except for the disabled case-folding lookup.

No functionality changes.

Preparation for fixing some of the outstanding error reporting issues.

Change-Id: I4778d006c17f4e084ecc2cac7386c68e86aa49eb
Reviewed-on: https://go-review.googlesource.com/c/go/+/382614
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:38 +00:00
Robert Griesemer
d5bd3f9a6c go/types, types2: use same method lookup code in both type checkers
types2 has some code to handle case-folding when doing method lookups
which was missing in go/types. This change is a first step to match
the implementations. Specifically:

In types2:
- remove the lookupMethodFold names in favor of just lookupMethod,
  but with the foldCase flag (e.g., instead if lookupMethodFold,
  we just use lookupMethod)
- rename checkFold to foldCase everywhere
- add foldCase parameter where it was missing
- moved foldCase paremeter to the end in lookupFieldOrMethod
- no functionality changes

In go/types:
- match function signatures with types2 use
- always provide false as argument for foldCase for now
- no functionality changes

Preparation for fixing some of the outstanding error reporting issues.

Change-Id: If129a5feb89ddf96a3596e8d73b23afa591875a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/382461
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:35 +00:00
Robert Griesemer
63e833154c go/types, types2: better error messages for expression switches
Fixes #50965.

Change-Id: I61a74bdb46cf5e72ab94dbe8bd114704282b6211
Reviewed-on: https://go-review.googlesource.com/c/go/+/382354
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:29 +00:00
Robert Griesemer
e052044d6b go/types, types2: better error messages for comparisons
Refactor Checker.comparison such that its logic is easier to reason
about and so that special cases can be handled more directly.

Use the appropriate operand (of 1st or 2nd operand) for error
reporting (position and type), rather than always using the
first operand.

Use an extra parameter to indicate a switch case
comparison; in this case the error is always reported at
the position of the first operand. (The error messages are
not yet adjusted for switches; see next CL.)

Introduce a new kindString function which is used to print simplified
types in error messages (related to comparisons only): instead of
printing the details of a struct type, we just print "struct" where
the details are not relevant. This matches the 1.17 compiler behavior.

Added a "reportf" parameter to the internal comparable function so we
can report an error cause in addition to the boolean result. Rather
than passing a *string for cause, we pass a function to record the
cause so that we can use the *Checker context for printing (needed
for proper type qualification). This mechanism reports the same
details now as the 1.17 compiler.

Adjusted various tests as needed added new test files.

Fixes #50918.

Change-Id: I1f0e7af22f09db4d31679c667c71a9038a8dc9d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/381964
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2022-02-04 23:42:25 +00:00
Katie Hockman
f9763a648b internal/fuzz: change meaning of "total" in output
Fixes #51023

Change-Id: I7dd9f7c696e15ba9c6c887d4c4e0f4d281a82b17
Reviewed-on: https://go-review.googlesource.com/c/go/+/383414
Trust: Katie Hockman <katie@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-04 22:34:05 +00:00
Katie Hockman
56a5397248 testing: remove TODO and link to fuzz docs
Change-Id: I3f5ee9629b0b0f3f29a021a656dbf3bca27e582d
Reviewed-on: https://go-review.googlesource.com/c/go/+/383415
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-04 22:27:25 +00:00
Brandon Bennett
2aafd9ea17 cmd/go: preserve LIBRARY_PATH and C_INCLUDE_PATH for script tests
In bespoke build environments default libraries may be specificied with
LIBRARY_PATH, C_INCLUDE_PATH enviroment variables to overide the system
(i.e glibc). Allow them though to allow cgo testing of these enviroments.

Fixes #50985

Change-Id: I7497a7715d9b635a6ae97efaab94a7ff01cdf8e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/383334
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Trust: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-04 20:50:14 +00:00
Ian Lance Taylor
02224c8ce4 cmd/go: accept "-F dir" in compiler flags
Fixes #51008

Change-Id: I5e47c7be59d4aae1d5059d99231422212cffa23a
Reviewed-on: https://go-review.googlesource.com/c/go/+/383217
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
2022-02-04 20:44:18 +00:00
Kevin Burke
6e56fcedfb internal/nettrace: fix spelling error
Change-Id: Ibf51c0687197c0d791916b21cba7f8408aa5300a
Reviewed-on: https://go-review.googlesource.com/c/go/+/383216
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Trust: Kevin Burke <kevin@burke.dev>
2022-02-04 20:20:02 +00:00
Robert Findley
4afcc9f35e go/parser, go/types: don't parse type parameters on methods
The go/parser package is updated to report an error on method type
parameters, and to not store them in the AST. Tests are updated
accordingly, and error messages are normalized accross go/parser and the
compiler syntax package.

Before this CL, go/parser would parse type parameters on method
declarations and interface methods, leaving it to go/types to complain.
There are several problems with this:

- Interface Methods and Method declarations do not have type parameters
  in the spec. We try to align the parser with the productions in the
  spec.
- Parsing method type parameters means that downstream libraries
  (go/doc, go/format, etc.) theoretically need to handle them, even
  though they are not part of the language.
- Relatedly, go/types has inconsistent handling of method type
  parameters due to support being removed, leading to the crasher in
  #50427.

It is more consistent and safer to disallow type parameters on methods
in the parser.

Fixes #50427

Change-Id: I555766da0c76c4cf1cfe0baa9416863088088b4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/382538
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-02-04 00:43:57 +00:00
Keith Randall
4e2410617d cmd/compile: restrict generics test to -G=3
Change-Id: Ifdb4f4f4fab8d45847ca525198b3960f87799f0c
Reviewed-on: https://go-review.googlesource.com/c/go/+/383034
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
2022-02-03 23:55:05 +00:00
Ian Lance Taylor
248ad855b7 misc/cgo/test: disable unhelpful GCC warning
GCC 9 warns about a change in the ABI of passing structs with bitfields,
but we don't care.

Fixes #50987

Change-Id: Ica658d04172a42a7be788f94d31a714bb8c4766f
Reviewed-on: https://go-review.googlesource.com/c/go/+/382956
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Trust: Benny Siegert <bsiegert@gmail.com>
2022-02-03 22:55:24 +00:00