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57289 Commits

Author SHA1 Message Date
Bryan C. Mills
230e549142 doc/go1.21: add a release note for CL 463177
I'm not sure why the relnote tool did not fill in a TODO for that
change; one was requested in
http://go.dev/cl/c/go/+/463177/3#message-87065dffb06e196fba9a325fefb32f16b41b6b15.

Updates #50807.
Updates #27225.

Change-Id: If6be8c126bcafb04ba92de88d2fc74a0557a07b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/509098
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
2023-07-12 18:13:43 +00:00
Paul E. Murphy
5e4000ad7f cmd/compile: on PPC64, fix sign/zero extension when masking
(ANDCCconst [y] (MOV.*reg x)) should only be merged when zero
extending. Otherwise, sign bits are lost on negative values.

(ANDCCconst [0xFF] (MOVBreg x)) should be simplified to a zero
extension of x. Likewise for the MOVHreg variant.

Fixes #61297

Change-Id: I04e4fd7dc6a826e870681f37506620d48393698b
Reviewed-on: https://go-review.googlesource.com/c/go/+/508775
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-07-12 16:34:02 +00:00
Jonathan Amsterdam
af8f94e3c5 src/README.vendor: s/latest/master/
Update the README to specify the module query "@master" instead of
"@latest".

Vendoring the highest tagged version is unlikely to be right. Usually
one wants to vendor the module at HEAD.

Change-Id: Id00d23523a13fd3dcd73d6eacefdf50bcdbfa26e
Reviewed-on: https://go-review.googlesource.com/c/go/+/508823
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-07-11 21:30:51 +00:00
Jonathan Amsterdam
3eaee3d5dd testing/slogtest: check for no group with empty record
As #61067 pointed out, slog did not properly handle empty groups.
https://go.dev/cl/508436 dealt with most cases inside slog itself,
but handlers must still do a check on their own. Namely, a handler
must not output a group created by WithGroup unless the Record
has attributes.

This change adds a test to slogtest to check that case.

Fixes #61227.

Change-Id: Ibc065b6e5f6e199a41bce8332ea8c7f9d8373392
Reviewed-on: https://go-review.googlesource.com/c/go/+/508438
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-11 20:08:28 +00:00
Bryan C. Mills
167c8b73bf net/http/fcgi: eliminate goroutine leaks in tests
Also fix a (minor) double-Close error in Serve that was exposed by the
test fix.

Serve accepts a net.Listener, which produces net.Conn instances.
The documentation for net.Conn requires its methods to be safe for
concurrent use, so most implementations likely allow Close to be
called multiple times as a side effect of making it safe to call
concurrently with other methods. However, the net.Conn interface is a
superset of the io.Closer interface, io.Closer explicitly leaves the
behavior of multiple Close calls undefined, and net.Conn does not
explicitly document a stricter requirement.

Perhaps more importantly, the test for the fcgi package calls
unexported functions that accept an io.ReadWriteCloser (not a
net.Conn), and at least one of the test-helper ReadWriteCloser
implementations expects Close to be called only once.

The goroutine leaks were exposed by a racy arbitrary timeout reported
in #61271. Fixing the goroutine leak exposed the double-Close error:
one of the leaked goroutines was blocked on reading from an unclosed
pipe. Closing the pipe (to unblock the goroutine) triggered the second
Close call.

Fixes #61271.

Change-Id: I5cfac8870e4bb4f13adeee48910d165dbd4b76fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/508815
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-11 18:51:39 +00:00
Bryan C. Mills
cb7a091d72 os/exec: ignore context.Canceled errors in TestConcurrentExec
We cancel the Context to unblock the test as soon as all of the "exit"
processes have completed. If that happens to occur before all of the
"hang" processes have started, the Start calls may fail with
context.Canceled.

Since those errors are possible in normal operation of the test,
ignore them.

Fixes #61277.
Updates #61080.

Change-Id: I20db083ec89ca88eb085ceb2892b9f87f83705ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/508755
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-07-11 17:37:32 +00:00
Jonathan Amsterdam
651869716a log/slog: replace nil contexts with context.Background()
Passing nil for a context is discouraged. We should avoid it.

Fixes #61219.

Change-Id: I664387070aacb56af580b6b0791ca40982d2a711
Reviewed-on: https://go-review.googlesource.com/c/go/+/508437
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2023-07-11 17:06:26 +00:00
Jonathan Amsterdam
3f8b04bfb5 log/slog: change XXXCtx functions to XXXContext
Fixes #61200.

Change-Id: I3071dbf673bcd2d24e62644b40d481c953703978
Reviewed-on: https://go-review.googlesource.com/c/go/+/508195
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-11 16:33:46 +00:00
Bryan C. Mills
4c58d6bf52 time: increase arbitrary upper bound in TestReset to 10s
The previous upper bound was around 0.375 s, which is empirically
too short on a slow, heavily-loaded builder. Since the test doesn't
seem to depend on the actual duration in any meaningful way, let's
make it several orders of magnitude larger.

Fixes #61266.

Change-Id: I6dde5e174966ee385db67e3cb87334f463c7e597
Reviewed-on: https://go-review.googlesource.com/c/go/+/508695
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-07-11 13:19:40 +00:00
Matthieu Baerts
6a063b01b0 net: mptcp: force using MPTCP with GODEBUG
When adding MPTCP support to address the proposal #56539, I missed the
GODEBUG setting from Russ Cox's plan:

  I am inclined to say that we add MPTCP as an opt-in for a release or
  two, and then make it opt-out. There should be a GODEBUG setting (...)

See: https://github.com/golang/go/issues/56539#issuecomment-1309294637

Thanks to andrius4669 for having reported this issue to me.

It makes sense to have this GODEBUG setting not to have to modify
applications to use MPTCP (if available). It can then be useful to
estimate the impact in case we want to switch from opt-in to opt-out
later.

The MPTCP E2E test has been modified to make sure we can enable MPTCP
either via the source code like it was already the case before or with
this environment variable:

  GODEBUG=multipathtcp=1

The documentation has been adapted accordingly.

I don't know if it is too late for Go 1.21 but I had to put a version in
the documentation. The modification is small, the risk seems low and
this was supposed to be there from the beginning according to Russ Cox's
specifications. It can also be backported or only be present in the
future v1.22 if it is easier.

Note: I didn't re-open #56539 or open a new one. It is not clear to me
what I should do in this case.

Fixes #56539

Change-Id: I9201f4dc0b99e3643075a34c7032a95528c48fa0
Reviewed-on: https://go-review.googlesource.com/c/go/+/507375
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
2023-07-11 00:36:57 +00:00
Bryan C. Mills
07ede7a543 syscall: serialize locks on ForkLock on platforms where forkExecPipe is not atomic
In CL 421441, we changed syscall to allow concurrent calls to
forkExec.

On platforms that support the pipe2 syscall that is the right
behavior, because pipe2 atomically opens the pipe with CLOEXEC already
set.

However, on platforms that do not support pipe2 (currently aix and
darwin), syscall.forkExecPipe is not atomic, and the pipes do not
initially have CLOEXEC set. If two calls to forkExec proceed
concurrently, a pipe intended for one child process can be
accidentally inherited by the other. If the process is long-lived, the
pipe can be held open unexpectedly and prevent the parent process from
reaching EOF reading the child's status from the pipe.

Fixes #61080.
Updates #23558.
Updates #54162.

Change-Id: I83edcc80674ff267a39d06260c5697c654ff5a4b
Reviewed-on: https://go-review.googlesource.com/c/go/+/507355
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
2023-07-10 19:19:59 +00:00
Cuong Manh Le
7dc62f3bda test: add test cases for index value with range array clear
Updates #61127

Change-Id: I5fb032c990b64bb4f455a7c0345cfb556bf263bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/508335
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
2023-07-10 16:36:41 +00:00
Cuong Manh Le
0b65b02ba5 cmd/compile: fix clear on slice with zero size elem
Fixed #61127

Change-Id: If07b04ebcc98438c66f273c0c94bea1f230dc2e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/507535
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2023-07-10 16:31:54 +00:00
Keith Randall
c4db811e44 cmd/compile: don't ICE on unaligned offsets for pointer writes
User code is unlikely to be correct, but don't crash the compiler
when the offset of a pointer in an object is not a multiple of the
pointer size.

Fixes #61187

Change-Id: Ie56bfcb38556c5dd6f702ae4ec1d4534c6acd420
Reviewed-on: https://go-review.googlesource.com/c/go/+/508555
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
2023-07-10 16:29:42 +00:00
qmuntal
5c15498609 os: support reading empty root directories on Windows
GetFileInformationByHandleEx can return `ERROR_FILE_NOT_FOUND` when no
files were found in a root directory, as per MS-FSA 2.1.5.6.3 [1].

This error code should not be treated as an error, but rather as an
indication that no files were found, in which case `readdir` should
return an empty slice.

This CL doesn't add any test as it is difficult to trigger this error
code. Empty root directories created using Windows utilities such as
`net use` always report at least the optional `.` and `..` entries.
A reproducer is provided in #61159, but it requires WinFSP to be
installed.

Fixes #61159

[1] https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-fsa/fa8194e0-53ec-413b-8315-e8fa85396fd8

Change-Id: Id46452030f5355c292e5b0abbf5e22af434a84d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/507775
Reviewed-by: Nick Craig-Wood <nickcw@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-07-07 22:02:26 +00:00
Than McIntosh
894d24d617 src/database/sql: run gofmt
Run gofmt on a source file.

Change-Id: I180d5cc7425fc5d8e9cf63005ac692f361beb1ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/508497
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Eli Bendersky <eliben@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-07 20:48:55 +00:00
Robert Findley
ac9137f8d3 go/types, types2: do not mutate arguments in NewChecker
CL 507975 resulted in new data races (as reported in #61212), because
the pkg argument to NewChecker was mutated.

Fix this by deferring the recording of the goVersion in pkg until type
checking is actually initiated via a call to Checker.Files.
Additionally, modify types2/check.go to bring it in sync with the
changes in go/types/check.go, and generate the new version_test.go from
the types2 file.

Also move parsing the version into checkFiles, for simplicity.

Fixes #61212

Change-Id: I15edb6c2cff3085622fe7c6a3b0dab531d27bd04
Reviewed-on: https://go-review.googlesource.com/c/go/+/508439
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2023-07-07 19:58:56 +00:00
Michael Munday
158d11196f math: add test that covers riscv64 fnm{add,sub} codegen
Adds a test that triggers the RISC-V fused multiply-add code
generation bug fixed by CL 506575.

Change-Id: Ia3a55a68b48c5cc6beac4e5235975dea31f3faf2
Reviewed-on: https://go-review.googlesource.com/c/go/+/507035
Auto-Submit: M Zhuo <mzh@golangcn.org>
Reviewed-by: M Zhuo <mzh@golangcn.org>
Run-TryBot: Michael Munday <mike.munday@lowrisc.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2023-07-07 17:39:26 +00:00
Jonathan Amsterdam
d3d78b4bcc log/slog: handle recursively empty groups
Handlers should not display empty groups.

A group with no attributes is certainly empty. But we also want to
consider a group to be empty if all its attributes are empty groups.
The built-in handlers did not handle this second case properly.
This CL fixes that.

There are two places in the implementation that we need to consider.

For Values of KindGroup, we change the GroupValue constructor to omit
Attrs that are empty groups. A Group is then empty if and only if it
has no Attrs. This avoids a recursive check for emptiness.
It does require allocation, but that doesn't worry us because Group
values should be relatively rare.

For groups established by WithGroup, we avoid opening such groups
unless the Record contains non-empty groups. As we did for values, we
avoid adding empty groups to records in the first place, so we only
need to check that the record has at least one Attr.

We are doing extra work, so we need to make sure we aren't slowing
things down unduly. Benchmarks before and after this change show
minimal differences.

Fixes #61067.

Change-Id: I684c7ca834bbf69210516faecae04ee548846fb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/508436
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-07 15:07:02 +00:00
Achille Roussel
39c5070712 os: do not skip directory entries with zero inodes on wasip1
When building programs to GOOS=wasip1, the program does not have the
guarantees that the underlying directories will come from a file system
where a zero inode value indicates that the entry was deleted but not
yet removed from the directory. The host runtime may be running on
windows or may be exposing virtual user-space file systems that do not
have the concept of inodes. In those setup, we assume that the host
runtime is in charge of dealing with edge cases such as skipping
directory entries with zero inodes when needed, and the guest
application should trust the list of entries that it sees;
therefore, we disable skipping over zero inodes on wasip1.

Change-Id: I99aa562441cdb4182965f270af054cf3cf7f8f20
Reviewed-on: https://go-review.googlesource.com/c/go/+/507915
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
2023-07-06 23:23:41 +00:00
Cherry Mui
e6ec2a34dc runtime: print output on failure in TestMemPprof
If running testprog fails, print the output.

For #60901.

Change-Id: Iee80fb09412ce13bae6ac3589779a8cdf7761765
Reviewed-on: https://go-review.googlesource.com/c/go/+/507978
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
2023-07-06 20:35:47 +00:00
Ian Lance Taylor
449ef3795d net: only build cgo_stub.go on unix or wasip1
We were building it for Windows, although Windows code never calls
any of these functions. When using -tags netgo that cause a multiple
definition of cgoAvailable.

Fixes #61153

Change-Id: Ib9e1de7720a8c0dacd6f12002917bf305dfa5405
Reviewed-on: https://go-review.googlesource.com/c/go/+/507655
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2023-07-06 19:37:13 +00:00
Russ Cox
6305d7fdd3 cmd/go: pass GoVersion in vet config
When invoking a vet tool with -vettool (or vet itself),
we need to pass the package's GoVersion to use when
analyzing the package.

The test of this behavior is in the x/tools/go/analysis CL 507880.

For #61176.

Change-Id: I3b5a90fcd19a0adc7fb29366e106e18f722fc061
Reviewed-on: https://go-review.googlesource.com/c/go/+/507976
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
2023-07-06 13:09:30 +00:00
Russ Cox
b490bdc27d go/types: record Config.GoVersion for reporting in Package.GoVersion method
Clients of go/types, such as analyzers, may need to know which
specific Go version a package is written for. Record that information
in the Package and expose it using the new GoVersion method.

Update parseGoVersion to handle the new Go versions that may
be passed around starting in Go 1.21.0: versions like "go1.21.0"
and "go1.21rc2". This is not strictly necessary today, but it adds some
valuable future-proofing.

While we are here, change NewChecker from panicking on invalid
version to saving an error for returning later from Files.
Go versions are now likely to be coming from a variety of sources,
not just hard-coded in calls to NewChecker, making a panic
inappropriate.

For #61174.
Fixes #61175.

Change-Id: Ibe41fe207c1b6e71064b1fe448ac55776089c541
Reviewed-on: https://go-review.googlesource.com/c/go/+/507975
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2023-07-06 13:09:19 +00:00
Merrick Clay
36ea4f9680 log/slog: fix faulty test
Adds an optional close quote in the expected log message regex for TestConnections to prevent failing when the source filepath is surrounded in quotes due to it containing one or more spaces.

Fixes #61161

Change-Id: I0dd71fb4389bff963bbfdc668ef4e4dfe787eafc
Reviewed-on: https://go-review.googlesource.com/c/go/+/508055
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-06 00:01:44 +00:00
Meng Zhuo
3fce111535 cmd/compile: fix FMA negative commutativity of riscv64
According to RISCV manual 11.6:

FMADD x,y,z computes x*y+z and
FNMADD x,y,z => -x*y-z
FMSUB x,y,z => x*y-z
FNMSUB x,y,z => -x*y+z respectively

However our implement of SSA convert FMADD -x,y,z to FNMADD x,y,z which
is wrong and should be convert to FNMSUB according to manual.

Change-Id: Ib297bc83824e121fd7dda171ed56ea9694a4e575
Reviewed-on: https://go-review.googlesource.com/c/go/+/506575
Run-TryBot: M Zhuo <mzh@golangcn.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Reviewed-by: Michael Munday <mike.munday@lowrisc.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-07-05 22:05:44 +00:00
Michael Munday
c8dad424bf math: fix portable FMA when x*y < 0 and x*y == -z
When x*y == -z the portable implementation of FMA copied the sign
bit from x*y into the result. This meant that when x*y == -z and
x*y < 0 the result was -0 which is incorrect.

Fixes #61130.

Change-Id: Ib93a568b7bdb9031e2aedfa1bdfa9bddde90851d
Reviewed-on: https://go-review.googlesource.com/c/go/+/507376
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Michael Munday <mike.munday@lowrisc.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joedian Reid <joedian@golang.org>
2023-07-05 22:05:30 +00:00
zikaeroh
cd6676126b database/sql: prevent internal context error from being returned from Rows.Err()
CL 497675 modified Rows such that context errors are propagated through
Rows.Err(). This caused an issue where calling Close meant that an
internal cancellation error would (eventually) be returned from Err:

1. A caller makes a query using a cancellable context.
2. initContextClose sees that either the query context or the
   transaction context can be canceled, so will need to spawn a
   goroutine to capture their errors.
3. initContextClose derives a context from the query context via
   WithCancel and sets rs.cancel.
4. When a user calls Close, rs.cancel is called. awaitDone's ctx is
   cancelled, which is good, since we don't want it to hang forever.
5. This internal cancellation (after CL 497675) has its error saved on
   contextDone.
6. Later, calling Err will return the error in contextDone if present.

This leads to a race condition depending on how quickly Err is called
after Close.

The docs for Close and Err state that calling Close should have no
affect on the return result for Err. So, a potential fix is to ensure
that awaitDone does not save the error when the cancellation comes from
a Close via rs.cancel.

This CL does that, using a new context not derived from the query
context, whose error is ignored as the query context's error used to be
before the original bugfix.

The included test fails before the CL, and passes afterward.

Fixes #60932

Change-Id: I2bf4c549efd83d62b86e298c9c45ebd06a3ad89a
Reviewed-on: https://go-review.googlesource.com/c/go/+/505397
Auto-Submit: Russ Cox <rsc@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2023-07-05 17:10:36 +00:00
Michael Anthony Knyszek
b2215e49c7 runtime,runtime/metrics: clarify OS stack metrics
There are some subtle details here about measuring OS stacks in cgo
programs. There's also an expectation about magnitude in the MemStats
docs that isn't in the runtime/metrics docs. Fix both.

Fixes #54396.

Change-Id: I6b60a62a4a304e6688e7ab4d511d66193fc25321
Reviewed-on: https://go-review.googlesource.com/c/go/+/502156
Run-TryBot: Michael Knyszek <mknyszek@google.com>
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2023-07-05 15:21:49 +00:00
Keith Randall
e126572f8a runtime: have ReadMemStats do a nil check before switching stacks
This gives the user a better stack trace experience. No need to
expose them to runtime.systemstack and friends.

Fixes #61158

Change-Id: I4f423f82e54b062773067c0ae64622e37cb3948b
Reviewed-on: https://go-review.googlesource.com/c/go/+/507755
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
2023-07-04 16:54:39 +00:00
Oleksandr Redko
e4ed92a355 os, syscall: update unreachable link about =C: envs
Change-Id: I185dec133599f9c69fda7563697bbc33e433fb78
Reviewed-on: https://go-review.googlesource.com/c/go/+/507135
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Auto-Submit: Ian Lance Taylor <iant@google.com>
2023-07-04 15:31:54 +00:00
Meng Zhuo
5c1a15df41 test/codegen: enable Mul2 DivPow2 test for riscv64
Change-Id: Ice0bb7a665599b334e927a1b00d1a5b400c15e3d
Reviewed-on: https://go-review.googlesource.com/c/go/+/506035
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
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Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
2023-07-04 13:33:45 +00:00
Michael Pratt
5b72f45dd1 runtime: check GOFLAGS not GCFLAGS
GCFLAGS doesn't have any defined meaning. cmd/dist enables
mayMoreStackPreempt with GOFLAGS.

For #55160.

Change-Id: I7ac71e4a1a983a56bd228ab5d24294db5cc595f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/507359
Run-TryBot: Michael Pratt <mpratt@google.com>
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Auto-Submit: Michael Pratt <mpratt@google.com>
2023-06-30 22:02:00 +00:00
Chris O'Hara
18e17e2cb1 net: enable pure Go resolver for wasip1
Top-level functions in the net package that only read files,
for example LookupPort(...), or LookupIP(host) where host resides
in /etc/hosts, now work on wasip1.

If the application has the ability to create sockets (for example,
when using a sockets extension to WASI preview 1), it's now
possible to do name resolution by passing a custom Dial function
to a Resolver instance.

Change-Id: I923886f67e336820bc89f09ea1855387c8dac61a
Reviewed-on: https://go-review.googlesource.com/c/go/+/500579
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Randy Reddig <ydnar@shaderlab.com>
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2023-06-29 23:06:46 +00:00
Chris O'Hara
1e97c51536 syscall: stub Getrlimit on wasip1
This is a prerequisite to enabling the pure Go resolver for
wasip1.

Change-Id: Iecd8a18ce4c9eb69a697d29930bedb7175b4f0ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/500577
Run-TryBot: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2023-06-29 23:05:01 +00:00
Jes Cok
683f51d307 cmd/asm/internal/lex: fix comment, remove the first "has"
Change-Id: I429f0fa6c99ef576fe83c7bd0d1c1e176ecbb179
GitHub-Last-Rev: fb581b7f27
GitHub-Pull-Request: golang/go#61066
Reviewed-on: https://go-review.googlesource.com/c/go/+/507097
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2023-06-29 22:49:50 +00:00
Robert Griesemer
2db31efdba cmd/compile/internal/types2: make TestIssue43124 match the go/types version
Replace the (flaky) types2.TestIssue43124 with the code of the
(stable) go/types version of this test.

While at it, replace a handful of syntax.Pos{} with the equivalent
nopos, to further reduce differences between the two versions of
the issues_test.go file.

For #61064.

Change-Id: I69f3e4627a48c9928e335d67736cb875ba3835fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/507215
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2023-06-29 18:29:51 +00:00
Damien Neil
499458f7ca net/http: validate Host header before sending
Verify that the Host header we send is valid.
Avoids surprising behavior such as a Host of "go.dev\r\nX-Evil:oops"
adding an X-Evil header to HTTP/1 requests.

Add a test, skip the test for HTTP/2. HTTP/2 is not vulnerable to
header injection in the way HTTP/1 is, but x/net/http2 doesn't validate
the header and will go into a retry loop when the server rejects it.
CL 506995 adds the necessary validation to x/net/http2.

For #60374

Change-Id: I05cb6866a9bead043101954dfded199258c6dd04
Reviewed-on: https://go-review.googlesource.com/c/go/+/506996
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
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2023-06-29 17:00:06 +00:00
Than McIntosh
fe73c186eb cmd/{go,compile}: run gofmt
Ran gofmt on a couple of Go source files that needed it.

Change-Id: I0e9f78831f531a728b892a63c6e0c517d92b11a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/507156
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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2023-06-29 16:02:11 +00:00
Chris O'Hara
da5d8fdd0c runtime: run wasip1 tests with wazero
The latest wazero release supports non-blocking I/O and pre-opened
sockets. Unmask the relevant wasip1 tests so that there are multiple
WebAssembly runtimes exercising these code paths.

Change-Id: I8506ab35186f98fde2cd3ce84634d5fcb7b053f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/503595
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Reviewed-by: Carlos Amedee <carlos@golang.org>
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2023-06-29 15:35:27 +00:00
Ben Hoyt
411c99671a slices, maps: add examples; doc comment fixes
There are currently no examples in the new slices and maps package, so
add some. This adds examples for most functions in the slices package
except the very obvious ones, and adds examples for the DeleteFunc and
EqualFunc functions in the maps package.

Also clarify/correct a few doc comments:

* EqualFunc takes an "equality" function, not a "comparison" function
* It's confusing for Delete and DeleteFunc to say they "do not create a
  new slice", as they do return a new slice. They already say they
  "return the modified slice" which is enough.
* Similar for Compact, and mention that it returns the modified slice
  (and say why)
* Note that CompactFunc keeps the first element in equal runs
* Say what cmp is in SortStableFunc and IsSortedFunc
* Say that MinFunc and MaxFunc return the first value

Change-Id: I59c7bb1c7cabc4986d81018a5aaf5b712d3310f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/505095
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2023-06-29 15:34:32 +00:00
Mark Ryan
03cd8a7b0e internal/bytealg: fix alignment code in equal_riscv64.s
The riscv64 implementation of equal has an optimization that is
applied when both pointers share the same alignment but that alignment
is not 8 bytes.  In this case it tries to align both pointers to an 8 byte boundaries,
by individually comparing the first few bytes of each buffer.  Unfortunately,
the existing code is incorrect.  It adjusts the pointers by the wrong number
of bytes resulting, in most cases, in pointers that are not 8 byte aligned.

This commit fixes the issue by individually comparing the first
(8 - (pointer & 7)) bytes of each buffer rather than the first
(pointer & 7) bytes.

This particular optimization is not covered by any of the existing
benchmarks so a new benchmark, BenchmarkEqualBothUnaligned,
is provided.  The benchmark tests the case where both pointers have
the same alignment but may not be 8 byte aligned.  Results of the
new benchmark along with some of the existing benchmarks generated on
a SiFive HiFive Unmatched A00 with 16GB of RAM running Ubuntu 23.04
are presented below.

Equal/0-4                                 3.356n ± 0%    3.357n ± 0%        ~ (p=0.840 n=10)
Equal/1-4                                 63.91n ± 7%    65.97n ± 5%   +3.22% (p=0.029 n=10)
Equal/6-4                                 72.94n ± 5%    76.09n ± 4%        ~ (p=0.075 n=10)
Equal/9-4                                 84.61n ± 7%    85.83n ± 3%        ~ (p=0.315 n=10)
Equal/15-4                                103.7n ± 2%    102.9n ± 4%        ~ (p=0.739 n=10)
Equal/16-4                                89.14n ± 3%   100.40n ± 4%  +12.64% (p=0.000 n=10)
Equal/20-4                                107.8n ± 3%    106.8n ± 3%        ~ (p=0.725 n=10)
Equal/32-4                                63.95n ± 8%    67.79n ± 7%        ~ (p=0.089 n=10)
Equal/4K-4                                1.256µ ± 1%    1.254µ ± 0%        ~ (p=0.925 n=10)
Equal/4M-4                                1.231m ± 0%    1.230m ± 0%   -0.04% (p=0.011 n=10)
Equal/64M-4                               19.77m ± 0%    19.78m ± 0%        ~ (p=0.052 n=10)
EqualBothUnaligned/64_0-4                 43.70n ± 4%    44.40n ± 5%        ~ (p=0.529 n=10)
EqualBothUnaligned/64_1-4                6957.5n ± 0%    105.9n ± 1%  -98.48% (p=0.000 n=10)
EqualBothUnaligned/64_4-4                 100.1n ± 2%    101.5n ± 4%        ~ (p=0.149 n=10)
EqualBothUnaligned/64_7-4               6965.00n ± 0%    95.60n ± 4%  -98.63% (p=0.000 n=10)
EqualBothUnaligned/4096_0-4               1.233µ ± 1%    1.225µ ± 0%   -0.65% (p=0.015 n=10)
EqualBothUnaligned/4096_1-4             584.226µ ± 0%    1.277µ ± 0%  -99.78% (p=0.000 n=10)
EqualBothUnaligned/4096_4-4               1.270µ ± 1%    1.268µ ± 0%        ~ (p=0.105 n=10)
EqualBothUnaligned/4096_7-4             584.944µ ± 0%    1.266µ ± 1%  -99.78% (p=0.000 n=10)
EqualBothUnaligned/4194304_0-4            1.241m ± 0%    1.236m ± 0%   -0.38% (p=0.035 n=10)
EqualBothUnaligned/4194304_1-4          600.956m ± 0%    1.238m ± 0%  -99.79% (p=0.000 n=10)
EqualBothUnaligned/4194304_4-4            1.239m ± 0%    1.241m ± 0%   +0.22% (p=0.007 n=10)
EqualBothUnaligned/4194304_7-4          601.036m ± 0%    1.239m ± 0%  -99.79% (p=0.000 n=10)
EqualBothUnaligned/67108864_0-4           19.79m ± 0%    19.78m ± 0%        ~ (p=0.393 n=10)
EqualBothUnaligned/67108864_1-4         9616.61m ± 0%    19.82m ± 0%  -99.79% (p=0.000 n=10)
EqualBothUnaligned/67108864_4-4           19.82m ± 0%    19.82m ± 0%        ~ (p=0.971 n=10)
EqualBothUnaligned/67108864_7-4         9616.34m ± 0%    19.86m ± 0%  -99.79% (p=0.000 n=10)
geomean                                   38.38µ         7.194µ       -81.26%

Change-Id: I4caab6c3450bd7e2773426b08b70bbc37fbe4e5f
Reviewed-on: https://go-review.googlesource.com/c/go/+/500855
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2023-06-29 02:34:59 +00:00
Cuong Manh Le
8b5fe5980c cmd/compile: handle min/max correctly in mayCall
CL 500575 changed mayCall to return "false" for min/max builtin.

However, with string or float, min/max requires runtime call, so mayCall
should return true instead. This's probably not a big problem, because
CL 506115 makes order pass handle min/max correctly. But it's still
better to do it the right way.

Updates #60582

Change-Id: I9779ca62bebd0f95e52ad5fa55b9160dc35b33aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/506855
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2023-06-28 21:18:31 +00:00
Matthew Dempsky
79d4defa75 cmd/compile/internal/ssagen: fix min/max codegen, again
The large-function phi placement algorithm evidently doesn't like the
same pseudo-variable being used to represent expressions of varying
types.

Instead, use the same tactic as used for "valVar" (ssa.go:6585--6587),
which is to just generate a fresh marker node each time.

Maybe we could just use the OMIN/OMAX nodes themselves as the key
(like we do for OANDAND/OOROR), but that just seems needlessly risky
for negligible memory savings. Using fresh marker values each time
seems obviously safe by comparison.

Fixes #61041.

Change-Id: Ie2600c9c37b599c2e26ae01f5f8a433025d7fd08
Reviewed-on: https://go-review.googlesource.com/c/go/+/506679
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2023-06-28 16:07:47 +00:00
Russ Cox
a3093eca64 cmd/go: enable slog vet check during 'go test'
The slog check is new and no existing code uses slog (it's new too),
so there are no concerns about false positives in existing code.
Enable it by default.

Change-Id: I4fc1480eeb5a3acc9e5e095e9d5428f5ce04b121
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2023-06-28 02:41:38 +00:00
Ian Lance Taylor
6691f438c3 cmd/dist, internal/abi: support bootstrapping with gccgo
The required gc bootstrap compiler, 1.17, has an internal/lazyregexp
package. It permits that package to be imported by internal/profile
while bootstrapping. The gccgo compiler also has an internal/lazyregexp
package, but it does not permit the gc compiler to import it.

Permit bootstrapping with gccgo by adding internal/lazyregexp to the
list of bootstrap directories.

The gccgo compiler recognizes the magic functions internal/abi.FuncPCABI0
and FuncPCABIInternal, but only in the internal/abi package, not
in the bootstrapping internal/abi package.

Permit bootstrapping with gccgo by adding definitions of those functions
with build tags so that they are only used by gccgo.

Fixes #60913

Change-Id: I3a78848d545db13314409d170d63f4cc737ca12e
Reviewed-on: https://go-review.googlesource.com/c/go/+/505036
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2023-06-27 21:15:37 +00:00
Hiro
942c1c12d8 runtime: fix trace.Stop deadlock when built with faketime
For #60806

Change-Id: I1ac18a6c7c703a1d6c4cd80f220059ba0be51e09
GitHub-Last-Rev: d300ca3f31
GitHub-Pull-Request: golang/go#60834
Reviewed-on: https://go-review.googlesource.com/c/go/+/503356
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2023-06-27 18:21:24 +00:00
Cuong Manh Le
4ad4128d3c cmd/compile: fix bad order of evaluation for min/max builtin
For float or string, min/max builtin performs a runtime call, so we need
to save its result to temporary variable. Otherwise, the runtime call
will clobber closure's arguments currently on the stack when passing
min/max as argument to closures.

Fixes #60990

Change-Id: I1397800f815ec7853182868678d0f760b22afff2
Reviewed-on: https://go-review.googlesource.com/c/go/+/506115
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2023-06-27 18:18:23 +00:00
Joe Tsai
4f36f7e4dd encoding: document that base32 and base64 do not use UTF-8
The invention of base32 and base64 predates the invention of UTF-8
and was never meant to output valid UTF-8.
By default, the output is always valid ASCII (and thus valid UTF-8)
except when the user specifies an alphabet or padding value
that is larger than '\x7f'. If that is done,
then the exact byte symbol is used rather than the UTF-8 encoding.

Fixes #60689

Change-Id: I4ec88d974ec0658ad1a578bbd65a809e27c73ea7
Reviewed-on: https://go-review.googlesource.com/c/go/+/505237
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2023-06-27 17:27:30 +00:00
qmuntal
8008c0840f syscall: clarify which handles are affected by SysProcAttr.NoInheritHandles
SysProcAttr.NoInheritHandles doc comment is not clear about which
handles are affected by it. This CL clarifies that it not only affects
the ones passed in AdditionalInheritedHandles, but also the ones
passed in ProcAttr.Files, which are required to be stderr, stdin and
stdout when calling syscall.StartProcess.

Updates #60942

Change-Id: I5bc5b3604b6db04b83f6764d5c5ffbdafeeb22fb
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2023-06-27 16:16:24 +00:00