Filippo Valsorda [Sat, 30 Oct 2021 06:01:35 +0000 (02:01 -0400)]
crypto/elliptic: use generics for nistec-based curves
There was no way to use an interface because the methods on the Point
types return concrete Point values, as they should.
A couple somewhat minor annoyances:
- Allocations went up due to #48849. This is fine here, where
math/big causes allocations anyway, but would probably not be fine
in nistec itself.
- Carrying the newPoint/newGenerator functions around as a field is
a little weird, even if type-safe. It also means we have to make
what were functions methods so they can access newPoint to return
the zero value. This is #35966.
For #52182
Change-Id: I050f3a27f15d3f189818da80da9de0cba0548931
Reviewed-on: https://go-review.googlesource.com/c/go/+/360015 Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Roland Shoemaker <roland@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
Filippo Valsorda [Sat, 30 Oct 2021 04:27:51 +0000 (00:27 -0400)]
crypto/elliptic: refactor package structure
Not quite golang.org/wiki/TargetSpecific compliant, but almost.
The only substantial code change is in randFieldElement: it used to use
Params().BitSize instead of Params().N.BitLen(), which is semantically
incorrect, even if the two values are the same for all named curves.
Keith Randall [Tue, 26 Apr 2022 23:32:07 +0000 (16:32 -0700)]
runtime: disable windowed Smhasher test on 32-bit systems
This test tends to be flaky on 32-bit systems.
There's not enough bits in the hash output, so we
expect a nontrivial number of collisions, and it is
often quite a bit higher than expected.
Fixes #43130
Change-Id: If35413b7c45eed778a08b834dacf98009ceca840
Reviewed-on: https://go-review.googlesource.com/c/go/+/402456
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Keith Randall <khr@google.com>
Michael Anthony Knyszek [Thu, 10 Feb 2022 00:49:44 +0000 (00:49 +0000)]
runtime: refactor the scavenger and make it testable
This change refactors the scavenger into a type whose methods represent
the actual function and scheduling of the scavenger. It also stubs out
access to global state in order to make it testable.
This change thus also adds a test for the scavenger. In writing this
test, I discovered the lack of a behavior I expected: if the
pageAlloc.scavenge returns < the bytes requested scavenged, that means
the heap is exhausted. This has been true this whole time, but was not
documented or explicitly relied upon. This change rectifies that. In
theory this means the scavenger could spin in run() indefinitely (as
happened in the test) if shouldStop never told it to stop. In practice,
shouldStop fires long before the heap is exhausted, but for future
changes it may be important. At the very least it's good to be
intentional about these things.
While we're here, I also moved the call to stopTimer out of wake and
into sleep. There's no reason to add more operations to a context that's
already precarious (running without a P on sysmon).
Change-Id: Ib31b86379fd9df84f25ae282734437afc540da5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/384734 Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Anthony Knyszek [Thu, 24 Mar 2022 18:06:47 +0000 (18:06 +0000)]
runtime: disable idle mark workers with at least one dedicated worker
This change completes the proposal laid out in #44163. With #44313
resolved, we now ensure that stopped Ms are able to wake up and become
dedicated GC workers. As a result, idle GC workers are in theory no
longer required to be a proxy for scheduling dedicated mark workers.
And, with at least one dedicated mark worker running (which is
non-preemptible) we ensure the GC makes progress in all circumstances
when at least one is running. Currently we ensure at least one idle mark
worker is available at all times because it's possible before #44313
that a dedicated worker doesn't ever get scheduled, leading to a
deadlock if user goroutines block on a GC completing. But now that extra
idle mark worker should be unnecessary to ensure GC progress when at
least one dedicated mark worker is going to be scheduled.
Fixes #44163.
Change-Id: I62889ef2db4e69d44da883e8e6eebcfe5398c86d
Reviewed-on: https://go-review.googlesource.com/c/go/+/395634 Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Anthony Knyszek [Fri, 18 Mar 2022 23:59:12 +0000 (23:59 +0000)]
runtime: move scheduling decisions by schedule into findrunnable
This change moves several scheduling decisions made by schedule into
findrunnable. The main motivation behind this change is the fact that
stopped Ms can't become dedicated or fractional GC workers. The main
reason for this is that when a stopped M wakes up, it stays in
findrunnable until it finds work, which means it will never consider GC
work. On that note, it'll also never consider becoming the trace reader,
either.
Another way of looking at it is that this change tries to make
findrunnable aware of more sources of work than it was before. With this
change, any M in findrunnable should be capable of becoming a GC worker,
resolving #44313. While we're here, let's also make more sources of
work, such as the trace reader, visible to handoffp, which should really
be checking all sources of work. With that, we also now correctly handle
the case where StopTrace is called from the last live M that is also
locked (#39004). stoplockedm calls handoffp to start a new M and handle
the work it cannot, and once we include the trace reader in that, we
ensure that the trace reader gets scheduled.
This change attempts to preserve the exact same ordering of work
checking to reduce its impact.
One consequence of this change is that upon entering schedule, some
sources of work won't be checked twice (i.e. the local and global
runqs, and timers) as they do now, which in some sense gives them a
lower priority than they had before.
Fixes #39004.
Fixes #44313.
Change-Id: I5d8b7f63839db8d9a3e47cdda604baac1fe615ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/393880 Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Anthony Knyszek [Wed, 16 Mar 2022 15:47:57 +0000 (15:47 +0000)]
runtime: reduce max idle mark workers during periodic GC cycles
This change reduces the maximum number of idle mark workers during
periodic (currently every 2 minutes) GC cycles to 1.
Idle mark workers soak up all available and unused Ps, up to GOMAXPROCS.
While this provides some throughput and latency benefit in general, it
can cause what appear to be massive CPU utilization spikes in otherwise
idle applications. This is mostly an issue for *very* idle applications,
ones idle enough to trigger periodic GC cycles. This spike also tends to
interact poorly with auto-scaling systems, as the system might assume
the load average is very low and suddenly see a massive burst in
activity.
The result of this change is not to bring down this 100% (of GOMAXPROCS)
CPU utilization spike to 0%, but rather
min(25% + 1/GOMAXPROCS*100%, 100%)
Idle mark workers also do incur a small latency penalty as they must be
descheduled for other work that might pop up. Luckily the runtime is
pretty good about getting idle mark workers off of Ps, so in general
the latency benefit from shorter GC cycles outweighs this cost. But, the
cost is still non-zero and may be more significant in idle applications
that aren't invoking assists and write barriers quite as often.
We can't completely eliminate idle mark workers because they're
currently necessary for GC progress in some circumstances. Namely,
they're critical for progress when all we have is fractional workers. If
a fractional worker meets its quota, and all user goroutines are blocked
directly or indirectly on a GC cycle (via runtime.GOMAXPROCS, or
runtime.GC), the program may deadlock without GC workers, since the
fractional worker will go to sleep with nothing to wake it.
Fixes #37116.
For #44163.
Change-Id: Ib74793bb6b88d1765c52d445831310b0d11ef423
Reviewed-on: https://go-review.googlesource.com/c/go/+/393394 Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Anthony Knyszek [Thu, 21 Apr 2022 22:18:31 +0000 (22:18 +0000)]
runtime: yield instead of sleeping in runqgrab on OpenBSD
OpenBSD has a coarse sleep granularity that rounds up to 10 ms
increments. This can cause significant STW delays, among other issues.
As far as I can tell, there's only 1 tightly timed sleep without an
explicit wakeup for which this actually matters.
Fixes #52475.
Change-Id: Ic69fc11096ddbbafd79b2dcdf3f912fde242db24
Reviewed-on: https://go-review.googlesource.com/c/go/+/401638 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Anthony Knyszek [Mon, 10 Jan 2022 22:59:26 +0000 (22:59 +0000)]
runtime: make alloc count metrics truly monotonic
Right now we export alloc count metrics via the runtime/metrics package
and mark them as monotonic, but that's not actually true. As an
optimization, the runtime assumes a span is always fully allocated
before being uncached, and updates the accounting as such. In the rare
case that it's wrong, the span has enough information to back out what
did not get allocated.
This change uses 16 bits of padding in the mspan to house another field
that represents the amount of mspan slots filled just as the mspan is
cached. This is information is enough to get an exact count, allowing us
to make the metrics truly monotonic.
Change-Id: Iaff3ca43f8745dc1bbb0232372423e014b89b920
Reviewed-on: https://go-review.googlesource.com/c/go/+/377516 Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Hana [Tue, 26 Apr 2022 14:38:11 +0000 (10:38 -0400)]
SECURITY.md: replace golang.org with go.dev
Change-Id: Ic0e882fc6666c9adcd5f2dffc96e201f3146fa0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/402180
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Michael Pratt [Mon, 7 Mar 2022 22:52:53 +0000 (17:52 -0500)]
runtime: use ABIInternal for most calls to sigtrampgo
sigtramp on openbsd-arm64 is teetering on the edge of the nosplit stack
limit. Add more headroom by calling sigtrampgo using ABIInternal, which
eliminates a 48-byte ABI wrapper frame.
openbsd-amd64 has slightly more space, but is also close to the limit,
so convert it as well.
Other operating systems don't have it as bad, but many have nearly
identical implementations of sigtramp, so I have converted them as well.
I've omitted darwin-arm64 and solaris, as those are quite different and
would benefit from not needing ifdef for both cases.
For #51485.
Change-Id: I70512645d4208b346a59d5e5d03836a45833b1d7
Reviewed-on: https://go-review.googlesource.com/c/go/+/390814
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
os/exec: use a TestMain to avoid hijacking stdout for helper commands
The previous implementation of helperCommand relied on running a
well-known Test function which implemented all known commands.
That not only added Skip noise in the test's output, but also (and
more importantly) meant that the commands could not write directly to
stdout in the usual way, since the testing package hijacks os.Stdout
for its own use.
The new implementation addresses the above issues, and also ensures
that all registered commands are actually used, reducing the risk of
an unused command sticking around after refactoring.
It also sets the subprocess environment variable directly in the test
process, instead of on each individual helper command's Env field,
allowing helper commands to be used without an explicit Env.
Updates #50599.
(Also for #50436.)
Change-Id: I189c7bed9a07cfe47a084b657b88575b1ee370b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/401934
Run-TryBot: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
When we call time.Unix(s, ns), the internal representation is
s + 62135596800, where 62135596800 is the number of
seconds from Jan 1 1 to Jan 1 1970.
If quickcheck generates numbers too close to 2^63,
the addition can wraparound to make a very negative
internal 64-bit value. Wraparounds are not guarded
against, since they would not arise in any reasonable program,
so just avoid testing near them.
Robert Griesemer [Mon, 25 Apr 2022 23:26:10 +0000 (16:26 -0700)]
cmd/compile/internal/syntax: parser to accept ~x as unary expression
Accept ~x as ordinary unary expression in the parser but recognize
such expressions as invalid in the type checker.
This change opens the door to recognizing complex type constraint
literals such as `*E|~int` in `[P *E|~int]` and parse them correctly
instead of reporting a parse error because `P*E|~int` syntactically
looks like an incorrect array length expression (binary expression
where the RHS of | is an invalid unary expression ~int).
As a result, the parser is more forgiving with expressions but the
type checker will reject invalid uses as before.
We could pass extra information into the binary/unary expression
parse functions to prevent the use of ~ in invalid situations but
it doesn't seem worth the trouble. In fact it may be advantageous
to allow a more liberal expression syntax especially in the presence
of errors (better parser synchronization after an error).
Preparation for fixing #49482.
Change-Id: I119e8bd9445dfa6460fcd7e0658e3554a34b2769
Reviewed-on: https://go-review.googlesource.com/c/go/+/402255
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Change-Id: I46543e188bf25384e529a9d5a3095033ac618bbd
Reviewed-on: https://go-review.googlesource.com/c/go/+/402057
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Carl Johnson [Mon, 28 Mar 2022 17:02:43 +0000 (17:02 +0000)]
net/http: add MaxBytesError
Fixes #30715
Change-Id: Ia3712d248b6dc86abef71ccea6e705a571933d53
GitHub-Last-Rev: 6ae68402a5a7c57f7f18e945d48c69ba2b134078
GitHub-Pull-Request: golang/go#49359
Reviewed-on: https://go-review.googlesource.com/c/go/+/361397 Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
reflect: support Len and Cap on pointer-to-array Value
Fixes #52411
Change-Id: I2fd13a453622992c52d49aade7cd058cfc8a77ca
GitHub-Last-Rev: d5987c2ec817ebd01d9e1adb3bd2e75274dbbabd
GitHub-Pull-Request: golang/go#52423
Reviewed-on: https://go-review.googlesource.com/c/go/+/400954 Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This test occasionally fails on the dragonfly-amd64 builder with
"directory not empty". Since that is the only platform on which we
observe these failures, and since the test had a different (and also
invalid-looking) failure mode prior to this one (in #50716), we
suspect that it is due to either a bug in the platform or a
platform-specific Go bug.
slices: use !{{Less}} instead of {{GreaterOrEqual}}
In CL 371574 PatchSet 18, we replaced all !{{Less}} with {{GreaterOrEqual}} to fix a problem(handle NaNs when sorting float64 slice) in exp/slices.
We don't actually need this change, because we don't guarantee that the slice will be sorted eventually if there are NaNs(we could have a[i] < a[j] for some i,j with i>j).
This CL reverts all the replacements in exp/slices and does not affect any codes in the sort package.
Change-Id: Idc225d480de3e2efef2add35c709ed880d1306cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/400534 Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Eli Bendersky <eliben@google.com> Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
Austin Clements [Fri, 5 Nov 2021 01:06:06 +0000 (21:06 -0400)]
cmd/dist: add maymorestack tests
These tests run the runtime, reflect, and sync package tests with the
two maymorestack hooks we have.
These tests only run on the longtest builders (or with
GO_TEST_SHORT=false) because we're running the runtime test two
additional times and the mayMoreStackMove hook makes it about twice as
slow (~230 seconds).
To run just these tests by hand, do
GO_TEST_SHORT=false go tool dist test -run mayMoreStack
Updates #48297.
This detected #49354, which was found as a flake on the dashboard, but
was reliably reproducible with these tests; and #49395.
There are a few tests of the scheduler run queue API that allocate a
local []g and test using those G's. However, the run queue API
frequently converts between *g and guintptr, which is safe for "real"
Gs because they're heap-allocated and hence don't move, but if these
tests get a stack movement while holding one of these local *g's as a
guintptr, it won't get updated and the test will fail.
Park Zhou [Fri, 11 Feb 2022 06:55:36 +0000 (14:55 +0800)]
cmd/compile: align table
Signed-off-by: Park Zhou <buildpaas@gmail.com>
Change-Id: Idbbd2779264a7310b839af8291315e5e38b7ced9
Reviewed-on: https://go-review.googlesource.com/c/go/+/402120 Reviewed-by: Robert Griesemer <gri@google.com> Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
Fix up TestEd25519Vectors to download files into its own temporary mod
cache, as opposed relying on whatever GOPATH or GOMODCACHE setting is
in effect when the test is run.
Robert Findley [Fri, 22 Apr 2022 15:47:11 +0000 (11:47 -0400)]
go/types, types2: add loong64 to gcArchSizes
Values are taken from cmd/internal/sys/arch.go. Also fix some incorrect
alphabetical sorting to put arm > amd.
Updates #46229
Fixes #52495
Change-Id: If7d2c675238093692060358003915f1649792cf5
Reviewed-on: https://go-review.googlesource.com/c/go/+/401576
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
Joel Sing [Thu, 21 Apr 2022 17:30:42 +0000 (03:30 +1000)]
os: use a lower file count for TestOpenFileLimit on openbsd
OpenBSD has a default soft limit of 512 and hard limit of 1024 - as such,
attempting to open 1200 files is always going to fail unless the defaults
have been changed. On this platform use 768 instead such that it passes
without requiring customisation.
Fixes #51713
Change-Id: I7679c8fd73d4b263145129e9308afdb29d67bb54
Reviewed-on: https://go-review.googlesource.com/c/go/+/401594 Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com> Reviewed-by: 谢致邦 <xiezhibang@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Peter Weinberger <pjw@google.com>
eric fang [Tue, 22 Mar 2022 07:04:35 +0000 (07:04 +0000)]
runtime: support for debugger function calls on linux/arm64
This CL adds support for debugger function calls on linux arm64
platform. The protocol is basically the same as in CL 109699, except for
the following differences:
1, The abi difference which affect parameter passing and frame layout.
2, Stores communication information in R20.
3, The closure register is R26.
4, Use BRK 0 instruction to generate a breakpoint. The saved PC in
sigcontext is the PC where the signal occurred, not the next PC.
In addition, this CL refactors the existing code (which is dedicated to
amd64) for easier multi-arch scaling.
Fixes #50614
Change-Id: I06b14e345cc89aab175f4a5f2287b765da85a86b
Reviewed-on: https://go-review.googlesource.com/c/go/+/395754 Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Eric Fang <eric.fang@arm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Keith Randall [Fri, 22 Apr 2022 00:04:34 +0000 (17:04 -0700)]
runtime/race: add s390x .syso file
Built using racebuild.
Note that racebuild fails when trying to test the .syso, because the
Go runtime doesn't think we support s390x race yet. But it builds the
.syso as a side effect which I grabbed. There's something of a
chicken-and-egg bootstrapping problem here, unfortunately.
Change-Id: Ibc6d04fd3a9bfb3224d08e8b78dcf09bb139a59d
Reviewed-on: https://go-review.googlesource.com/c/go/+/401714
Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Jonathan Albrecht <jonathan.albrecht@ibm.com>
Ian Lance Taylor [Fri, 22 Apr 2022 21:41:57 +0000 (14:41 -0700)]
regexp/syntax: rename ErrInvalidDepth to ErrNestingDepth
The proposal accepted the name ErrNestingDepth.
For #51684
Change-Id: I702365f19e5e1889dbcc3c971eecff68e0b08727
Reviewed-on: https://go-review.googlesource.com/c/go/+/401854
Run-TryBot: Ian Lance Taylor <iant@golang.org> 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: Rob Pike <r@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
net: eliminate a deadlock on the failure path in TestNotTemporaryRead
This fixes a deadlock-on-failure that I probably introduced in
CL 385314.
This doesn't explain why the failure observed in #52492 occurred, but
it will at least give us more information to diagnose the failure if
it happens again. (The deadlock currently prevents the t.Fatal log
message from being written to the test's output.)
Dmitri Shuralyov [Wed, 20 Apr 2022 16:46:17 +0000 (12:46 -0400)]
runtime: skip TestNoShrinkStackWhileParking on openbsd
The test has proven to be flaky on OpenBSD since March, and there
hasn't been progress on resolving this finding. Mark the test as
flaky to so that this problem doesn't block the Go 1.19 release.
Updates #51482.
Change-Id: I92ad7498c20cfa94565880363bec85f9a4f3e916
Reviewed-on: https://go-review.googlesource.com/c/go/+/401335
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Robert Findley [Mon, 18 Apr 2022 22:14:51 +0000 (18:14 -0400)]
go/types: use error_.errorf for reporting related error information
Use error_.errorf for reporting related error information rather than
inlining the "\n\t". This aligns go/types with types2 in cases where the
related information has no position information. In other cases,
go/types needs to report a "continuation error" (starting with '\t') so
that users can access multiple error positions.
Change-Id: Ica98466596c374e0c1e502e7227c8d8c803b4c22
Reviewed-on: https://go-review.googlesource.com/c/go/+/400825
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@google.com>
Robert Findley [Mon, 18 Apr 2022 20:47:42 +0000 (16:47 -0400)]
go/types: remove unnecessary indirection when reporting errors
Checker.err was only called to report errors created with
Checker.newError or Checker.newErrorf. Update the API to pass around
*Error rather than error, eliminating unnecessary type assertions and
handling.
Change-Id: I995a120c7e87266e656b8ff3fd9ed3d368fd17fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/400823
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@google.com>
Archana R [Wed, 10 Nov 2021 07:18:42 +0000 (01:18 -0600)]
internal/bytealg: optimize cmpbody for ppc64le/ppc64
Vectorize the cmpbody loop for bytes of size greater than or equal
to 32 on both POWER8(LE and BE) and POWER9(LE and BE) and improve
performance of smaller size compares
Performance improves for most sizes with this change on POWER8, 9
and POWER10. For the very small sizes (upto 8) the overhead of
calling function starts to impact performance.
cmd/compile: enable Asan check for global variables
With this patch, -asan option can detect the error memory
access to global variables.
So this patch makes a few changes:
1. Add the asanregisterglobals runtime support function,
which calls asan runtime function _asan_register_globals
to register global variables.
2. Create a new initialization function for the package
being compiled. This function initializes an array of
instrumented global variables and pass it to function
runtime.asanregisterglobals. An instrumented global
variable has trailing redzone.
3. Writes the new size of instrumented global variables
that have trailing redzones into object file.
4. Notice that the current implementation is only compatible with
the ASan library from version v7 to v9. Therefore, using the
-asan option requires that the gcc version is not less than 7
and the clang version is less than 4, otherwise a segmentation
fault will occur. So this patch adds a check on whether the compiler
being used is a supported version in cmd/go.
Change-Id: I664e74dcabf5dc7ed46802859174606454e8f1d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/321715 Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Fannie Zhang <Fannie.Zhang@arm.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Meng Zhuo [Wed, 30 Mar 2022 10:19:48 +0000 (18:19 +0800)]
internal/bytealg: port bytealg functions to reg ABI on riscv64
This CL adds support for the reg ABI to the bytes functions for
riscv64. These are initially under control of the
GOEXPERIMENT macro until all changes are in.
Change-Id: I026295ae38e2aba055f7a51c77f92c1921e5ec97
Reviewed-on: https://go-review.googlesource.com/c/go/+/361916
Run-TryBot: mzh <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Bryan C. Mills [Thu, 2 Dec 2021 14:39:22 +0000 (09:39 -0500)]
runtime/cgo: remove stdlib.h warning workaround on darwin
CL 205457 added the flag -Wno-nullability-completeness to work
around a user-reported build breakage on macOS Catalina.
However, according to
https://golang.org/issue/35247#issuecomment-589115489 the root cause
of the breakage may be a toolchain misconfiguration on the host
(perhaps compiling the XCode stdlib using a Homebrew build of the
"clang" compiler?).
Adding an obscure warning flag to enable building stdlib.h with an
otherwise-broken toolchain seems clearly inappropriate to me.
If need be we can instead provide guidance to users on how to unbreak
their toolchain.
Updates #35247
Fixes #49913
Change-Id: I84def34e101bed7911d8d78a991a29095b8791fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/368634 Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Ian Lance Taylor [Tue, 19 Apr 2022 17:32:54 +0000 (10:32 -0700)]
regexp: change ErrInvalidDepth message to match proposal
Also update the file in $GOROOT/api/next to use proposal number.
For #51684
Change-Id: I28bfa6bc1cee98a17b13da196d41cda34d968bb0
Reviewed-on: https://go-review.googlesource.com/c/go/+/401076 Reviewed-by: Rob Pike <r@golang.org> 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>
Joe Tsai [Sun, 17 Apr 2022 02:01:48 +0000 (19:01 -0700)]
reflect: make more Value methods inlineable
The following Value methods are now inlineable:
Bool for ~bool
String for ~string (but not other kinds)
Bytes for []byte (but not ~[]byte or ~[N]byte)
Len for ~[]T (but not ~[N]T, ~chan T, ~map[K]V, or ~string)
Cap for ~[]T (but not ~[N]T or ~chan T)
For Bytes, we only have enough inline budget to inline one type,
so we optimize for unnamed []byte, which is far more common than
named []byte or [N]byte.
For Len and Cap, we only have enough inline budget to inline one kind,
so we optimize for ~[]T, which is more common than the others.
The exception is string, but the size of a string can be obtained
through len(v.String()).
Add all inlineable methods of Value to cmd/compile/internal/test/inl_test.go.
Change-Id: Ifc192491918af6b62f7fe3a094a5a5256bfb326d
Reviewed-on: https://go-review.googlesource.com/c/go/+/400676 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> 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>
Change-Id: Ia0a4be56d4e1fbfc73e6ce24f01a658c89a74adb
GitHub-Last-Rev: dd95e50c4b37a031d3ee852bbb7487f748526562
GitHub-Pull-Request: golang/go#52393
Reviewed-on: https://go-review.googlesource.com/c/go/+/400694 Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Carlo Alberto Ferraris [Fri, 21 Jan 2022 05:21:38 +0000 (14:21 +0900)]
bufio: implement large write forwarding in Writer.WriteString
Currently bufio.Writer implements forwarding to the underlying Writer
for large writes via Write, but it does not do the same for large
writes via WriteString.
If the underlying Writer is also a StringWriter, use the same "large
writes" logic also in WriteString while taking care to only check
once per call to WriteString whether the underlying Writer implements
StringWriter.
Change-Id: Id81901c07b035936816b9e41b1f5688e699ee8e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/380074 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>
Ian Lance Taylor [Sun, 17 Apr 2022 01:28:29 +0000 (18:28 -0700)]
reflect: in assignTo only allocate target if needed
Also correct parameter name in comment.
Change-Id: Ic9486e08c2eea184faccf181cda7da808793def6
Reviewed-on: https://go-review.googlesource.com/c/go/+/400674
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dan Kortschak <dan@kortschak.io> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Joseph Tsai <joetsai@digital-static.net> Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Michael Pratt [Thu, 24 Feb 2022 21:54:13 +0000 (16:54 -0500)]
syscall: define Syscall in terms of RawSyscall on linux
This is a re-do of CL 388477, fixing #52472.
It is unsafe to call syscall.RawSyscall from syscall.Syscall with
-coverpkg=all and -race. This is because:
1. Coverage adds a sync/atomic call in RawSyscall to increment the
coverage counter.
2. Race mode instruments sync/atomic calls with TSAN runtime calls. TSAN
eventually calls runtime.racecallbackfunc, which expects
getg().m.p != 0, which is no longer true after entersyscall().
cmd/go actually avoids adding coverage instrumention to package runtime
in race mode entirely to avoid these kinds of problems. Rather than also
excluding all of syscall for this one function, work around by calling
RawSyscall6 instead, which avoids coverage instrumention both by being
written in assembly and in package runtime/*.
For #51087
Fixes #52472
Change-Id: Iaffd27df03753020c4716059a455d6ca7b62f347
Reviewed-on: https://go-review.googlesource.com/c/go/+/401654
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Michael Pratt <mpratt@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Michael Pratt [Wed, 12 Jan 2022 23:27:28 +0000 (18:27 -0500)]
cmd/trace: embed static content
cmd/trace is currently somewhat painful to use in odd environments since
it depends on the presence of $GOROOT/misc/trace to serve the static
trace viewer content.
Use //go:embed to embed this content directly into cmd/trace for easier
use.
Change-Id: I83b7d97dbecc9773f3b5a6b3bc4a6597473bc01a
Reviewed-on: https://go-review.googlesource.com/c/go/+/378194
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Daniel Martí [Thu, 21 Apr 2022 13:06:20 +0000 (14:06 +0100)]
go/format: skip go/ast's object resolution
Just like https://golang.org/cl/401454 removed the work from gofmt for a
nice ~5% speed-up in the default case, we can also use the option in the
equivalent go/format for programs which use it rather than gofmt,
as go/format makes no use of objects either.
No benchmark numbers as we already measured the ~5% speed-up with gofmt
in the other CL linked above.
See #46485.
Change-Id: Icbf98e6d46a616081314e2faa13f1dfade3bbaef
Reviewed-on: https://go-review.googlesource.com/c/go/+/401474
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Daniel Martí [Thu, 21 Apr 2022 13:00:26 +0000 (14:00 +0100)]
cmd/gofmt: only resolve go/ast objects when needed
go/parser will by default resolve objects as per the go/ast.Object type,
which is then used by gofmt's rewrite and simplify flags.
However, none of that is needed if neither of the flags is set,
so we can avoid the work entirely for a nice speed-up.
benchcmd -n 8 GofmtSrcCmd gofmt -l ~/tip/src/cmd
name old time/op new time/op delta
GofmtSrcCmd 957ms ± 7% 908ms ± 7% -5.12% (p=0.028 n=8+8)
name old user-time/op new user-time/op delta
GofmtSrcCmd 11.2s ± 1% 10.4s ± 1% -7.23% (p=0.001 n=7+7)
name old sys-time/op new sys-time/op delta
GofmtSrcCmd 325ms ±29% 286ms ±22% ~ (p=0.065 n=8+8)
name old peak-RSS-bytes new peak-RSS-bytes delta
GofmtSrcCmd 295MB ±17% 276MB ±15% ~ (p=0.328 n=8+8)
See #46485.
Change-Id: Iad1ae294953710c233f7837d7eb02e23d11c6185
Reviewed-on: https://go-review.googlesource.com/c/go/+/401454
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Roland Shoemaker [Thu, 21 Apr 2022 20:47:26 +0000 (13:47 -0700)]
crypto/x509: revert serial length restriction
This reverts CL400377, which restricted serials passed to
x509.CreateCertificate to <= 20 octets. Unfortunately this turns out to
be something _a lot_ of people get wrong. Since it's not particularly
obvious how to properly generate conformant serials, until we provide
an easier way for people to get this right, reverting this restriction
makes sense (possible solution discussed in #52444.)
Change-Id: Ia85a0ffe61e2e547abdaf1389c3e1ad29e28a2be
Reviewed-on: https://go-review.googlesource.com/c/go/+/401657 Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
Ian Lance Taylor [Wed, 13 Apr 2022 21:35:15 +0000 (14:35 -0700)]
misc/cgo/test: remove timing dependency from TestParallelSleep
Rename it TestIssue1560 since it no longer sleeps.
For #1560
Fixes #45586
Change-Id: I338eee9de43e871da142143943e9435218438e90
Reviewed-on: https://go-review.googlesource.com/c/go/+/400194 Reviewed-by: Bryan Mills <bcmills@google.com> 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>
Michael Matloob [Tue, 12 Apr 2022 19:17:18 +0000 (15:17 -0400)]
cmd/go: add a better error message when in a module outside workspace
When the user is trying to list or build a package in a module that's
outside of the workspace provide a more clear message hinting to the
user that they can add the module to the workspace using go work use.
Fixes #51604
Change-Id: I1202ecb2f22fd6351bfdec88ed613b8167687fb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/400014
Run-TryBot: Michael Matloob <matloob@golang.org> Reviewed-by: Michael Matloob <matloob@golang.org>
Auto-Submit: Michael Matloob <matloob@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Pratt [Mon, 28 Feb 2022 18:41:33 +0000 (13:41 -0500)]
syscall: move Syscall declarations to OS files
Future CLs will be changing the provenance of these functions. Move the
declarations to the individual OS files now so that future CLs can
change only 1 OS at a time rather than changing all at once.
For #51087
Change-Id: I5e1bca71e670263d8c0faa586c1b6b4de1a114b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/388474
Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Michael Pratt [Fri, 25 Feb 2022 19:21:25 +0000 (14:21 -0500)]
cmd/compile: add //go:uintptrkeepalive
This CL exports the existing ir.UintptrKeepAlive via the new directive
//go:uintptrkeepalive. This makes the compiler insert KeepAlives for
pointers converted to uintptr in calls, keeping them alive for the
duration of the call.
//go:uintptrkeepalive requires //go:nosplit, as stack growth can't
handle these arguments (it cannot know which are pointers). We currently
check this on the immediate function, but the actual restriction applies
to all transitive calls.
The existing //go:uintptrescapes is an extension of
//go:uintptrkeepalive which forces pointers to escape to the heap, thus
eliminating the stack growth issue.
This pragma is limited to the standard library.
For #51087
Change-Id: If9a19d484d3561b4219e5539b70c11a3cc09391e
Reviewed-on: https://go-review.googlesource.com/c/go/+/388095
Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
cmd/go: replace some calls to base.AppendPWD with cmd.Environ
With #50599 implemented, base.AppendPWD is redundant if cmd.Env would
otherwise be nil, and calls to os.Environ followed by base.AppendPWD
can be replaced by a simpler call to cmd.Environ.
Updates #50599.
Change-Id: I94a22e2a4cc8e83c815ac41702ea0b1ee5034ecc
Reviewed-on: https://go-review.googlesource.com/c/go/+/401534
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Change-Id: If3d8391d81e8de869dbb3c857f0570817e8aa440
Reviewed-on: https://go-review.googlesource.com/c/go/+/400914 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Change-Id: I5698c7576a0f39ae62de7bea64286ac8e578d421
Reviewed-on: https://go-review.googlesource.com/c/go/+/400916 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Change-Id: I5ccbcea4c53658136b25ca608faec19eeec2e908
Reviewed-on: https://go-review.googlesource.com/c/go/+/400915 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Roland Shoemaker [Tue, 19 Apr 2022 19:05:10 +0000 (12:05 -0700)]
crypto/x509: use SAN when comparing certs during path building
Per RFC 4158 Section 2.4.2, when we are discarding candidate
certificates during path building, use the SANs as well as subject and
public key when checking whether a certificate is already present in
the built path. This supports the case where a certificate in the chain
(typically a leaf) has the exact same subject and public key as another
certificate in the chain (typically its parent) but has SANs which don't
match.
Change-Id: I212c234e94a1f6afbe9691e4a3ba257461db3a7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/401115 Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
os/exec: preserve original order of entries in dedupEnv
Once #50599 is implemented, the entries will be observable via the
Environ method. I find it confusing for later entries in the list to
jump arbitrarily far forward based on entries for the same key that no
longer exist.
This also fixes the deduplication logic for the degenerate Windows
keys observed in #49886, which were previously deduplicated as empty
keys.
(It does not do anything about the even-more-degenerate keys observed
in #52436.)
Andrew Gerrand [Tue, 19 Apr 2022 05:11:37 +0000 (15:11 +1000)]
cmd/go/internal/test: wrap os.Stdout always
There is an issue where 'go test' will hang after the tests complete if
a test starts a sub-process that does not exit (see #24050).
However, go test only exhibits that behavior when a package name is
explicitly passed as an argument. If 'go test' is invoked without any
package arguments then the package in the working directory is assumed,
however in that case (and only that case) os.Stdout is used as the test
process's cmd.Stdout, which does *not* cause 'go test' wait for the
sub-process to exit (see #23019).
This change wraps os.Stdout in an io.Writer struct in this case, hiding
the *os.File from the os/exec package, causing cmd.Wait to always wait
for the full output from the test process and any of its sub-processes.
In other words, this makes 'go test' exhibit the same behavior as
'go test .' (or 'go test ./...' and so on).
Update #23019
Update #24050
Change-Id: Ica09bf156f3b017f9a31aad91ed0f16a7837195b
Reviewed-on: https://go-review.googlesource.com/c/go/+/400877 Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Andrew Gerrand <adg@golang.org>
Auto-Submit: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Andrew Gerrand <adg@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Support fastrand64 in the runtime, although fastrand uses wyrand to generate 64-bit random number, it still returns uint32. In some cases, we need to generate a 64-bit random number, the new API would be faster and easier to use, and at least we can use the new function in these places:
name time/op
Fastrand-16 0.09ns ± 5%
Fastrand64-16 0.09ns ± 6%
Change-Id: Ibb97378c7ca59bc7dc15535d4872fa58ea112e6a
Reviewed-on: https://go-review.googlesource.com/c/go/+/400734 Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Phil Kulin [Wed, 20 Apr 2022 14:13:29 +0000 (14:13 +0000)]
reflect: remove unused overflowPad variable
overflowPad variable in bucketOf function is a holdover from a NaCl port
and never used now.
Change-Id: Ib68fdb054e1b6a655ffbfd34521a3f8773a22694
GitHub-Last-Rev: f281be9c115a87605fd28b39c0b09eed54cc774a
GitHub-Pull-Request: golang/go#52449
Reviewed-on: https://go-review.googlesource.com/c/go/+/401274
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Robert Griesemer [Wed, 20 Apr 2022 19:05:30 +0000 (12:05 -0700)]
cmd/compile/internal/syntax: correct an error string
When we have an error in a function type used in an expression
we don't know until we see an opening { whether we have a function
literal or a function type. Use "function type" as context because
that's always correct in the specific error message.
Change-Id: I9aad8fcddf31ae53daa53cebd2c2001f08eabde0
Reviewed-on: https://go-review.googlesource.com/c/go/+/401316 Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Robert Griesemer <gri@google.com> Reviewed-by: Robert Griesemer <gri@google.com>
This test forces GOARCH to amd64, but currently uses the default GOOS.
This works on every OS that supports amd64, which is every OS we
support except AIX. Hence, on AIX this fails with an unsupported
GOOS/GOARCH combination.
go/internal/srcimporter: add context to cgo errors
An error message like "could not import os/user (exit status 1)"
(observed in https://go.dev/issue/52407) is fairly inscrutable.
On the other hand, srcimporter doesn't report errors with quite enough
structure to dump the entire stderr output from 'go tool cgo' without
potentially overwhelming the caller. Here, we split the difference by
describing which command failed but not printing the output of that
command.
For #52407, that would at least provide a stronger clue connecting
to #52408.