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>
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>
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>
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>
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>
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>
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>
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>
We're turning up Macs in a network environment that clashes with this
test. I don't think it's critical to get it working, so skip it.
For #49149.
Change-Id: I925e3ecc5356c4cefd208bdcff3d98021215d0b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/402181
Reviewed-by: Alex Rakoczy <alex@golang.org>
Run-TryBot: Heschi Kreinick <heschi@google.com>
Auto-Submit: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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>
This makes clearer that skipStdinCopyError is always defined and never
overridden in tests.
Secondarily, it may also help reduce init-time work and allow the
linker and/or inliner to better optimize this package.
(Noticed while prototyping #50436.)
Change-Id: I4f3c1bc146384a98136a4039f82165ed106c14b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/401897
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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.
Fixes#52409.
Change-Id: Id466c8a34a49055ab26f2687a6b2b657cb64bed6
Reviewed-on: https://go-review.googlesource.com/c/go/+/402177
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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>
Fixes#30715
Change-Id: Ia3712d248b6dc86abef71ccea6e705a571933d53
GitHub-Last-Rev: 6ae68402a5
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>
Fixes#52411
Change-Id: I2fd13a453622992c52d49aade7cd058cfc8a77ca
GitHub-Last-Rev: d5987c2ec8
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.
For #52301.
Change-Id: Id36c499651b9c48e6b8b0107d01f73d2a7b6bab8
Reviewed-on: https://go-review.googlesource.com/c/go/+/402155
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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>
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.
Change-Id: If785a8b8d6e1b9ad4d2ae67493b54055ab6cbc85
Reviewed-on: https://go-review.googlesource.com/c/go/+/361212
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Austin Clements <austin@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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.
Updates #48297.
Change-Id: Ifd424147ce1a1b53732ff0cf55a81df1a9beeb3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/402157
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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 an off-by-one error in COFFSymbolReadSectionDefAux, specifically
the code that tests whether a symbol index is valid.
Fixes#52525.
Change-Id: I1b6e5dacfd99249c694bef5ae606e90fdb2ef521
Reviewed-on: https://go-review.googlesource.com/c/go/+/402156
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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.
Change-Id: I523f1862f5874b0635a6c0fa83d35a6cfac6073b
Reviewed-on: https://go-review.googlesource.com/c/go/+/402154
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Values are taken from cmd/internal/sys/arch.go. Also fix some incorrect
alphabetical sorting to put arm > amd.
Updates #46229Fixes#52495
Change-Id: If7d2c675238093692060358003915f1649792cf5
Reviewed-on: https://go-review.googlesource.com/c/go/+/401576
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
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>
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>
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>
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>
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Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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.)
Fixes#52492.
Change-Id: I9e7874985e2820a6a4b703abe4f8e2035d5138c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/401575
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
In CL 397477 I merged long tests into the built-in cmd/release flow.
Skip them during the boringcrypto release for now; we've never run them
before.
For #51797.
Change-Id: I8d5caa945a2558cd3a311a90be5bfb62ae7b0ace
Reviewed-on: https://go-review.googlesource.com/c/go/+/401338
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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This is an exact copy of CL 401096 after fixing #52472 in CL 401654.
For #51087
For #52472
Change-Id: Ib3c914949a15517aacdca2d72e69e1c7b217e430
Reviewed-on: https://go-review.googlesource.com/c/go/+/401656
Run-TryBot: Michael Pratt <mpratt@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
This is an exact copy of CL 388478 after fixing #52472 in CL 401654.
For #51087
For #52472
Change-Id: I6c6bd7ddcab1512c682e6b44f61c7bcde97f5c58
Reviewed-on: https://go-review.googlesource.com/c/go/+/401655
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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>
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Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
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>
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Reviewed-by: Robert Griesemer <gri@google.com>
To begin aligning with types2 error reporting, use an error_ type to
hold unevaluated error information, to report via Checker.report.
Change-Id: Ic5ac515759961e55b81acc9eeaac4db25b61804c
Reviewed-on: https://go-review.googlesource.com/c/go/+/400824
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
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>
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Reviewed-by: Robert Griesemer <gri@google.com>
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>
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>
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 #35247Fixes#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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In CL 339309 this was probably copied from the respective godoc comment
in package inet.af/netaddr, also see
https://pkg.go.dev/inet.af/netaddr#IP.Is4
In net/netip the type is named Addr, so adjust the godoc comment
accordingly.
Change-Id: Ib5ab8054067f8b74119efa4732192a8407189f9b
Reviewed-on: https://go-review.googlesource.com/c/go/+/401394
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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>
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()).
Performance:
Bool 1.65ns ± 0% 0.51ns ± 3% -68.81% (p=0.008 n=5+5)
String 1.97ns ± 1% 0.70ns ± 1% -64.25% (p=0.008 n=5+5)
Bytes 8.90ns ± 2% 0.89ns ± 1% -89.95% (p=0.008 n=5+5)
NamedBytes 8.89ns ± 1% 8.88ns ± 1% ~ (p=0.548 n=5+5)
BytesArray 10.0ns ± 2% 10.2ns ± 1% +1.58% (p=0.048 n=5+5)
SliceLen 1.97ns ± 1% 0.45ns ± 1% -77.22% (p=0.008 n=5+5)
MapLen 2.62ns ± 1% 3.07ns ± 1% +17.24% (p=0.008 n=5+5)
StringLen 1.96ns ± 1% 1.98ns ± 2% ~ (p=0.151 n=5+5)
ArrayLen 1.96ns ± 1% 2.19ns ± 1% +11.46% (p=0.008 n=5+5)
SliceCap 1.76ns ± 1% 0.45ns ± 2% -74.28% (p=0.008 n=5+5)
There's a slight slowdown (~10-20%) for obtaining the length
of a string or map, but a substantial improvement for slices.
Performance according to encoding/json:
CodeMarshal 555µs ± 2% 562µs ± 4% ~ (p=0.421 n=5+5)
MarshalBytes/32 163ns ± 1% 157ns ± 1% -3.82% (p=0.008 n=5+5)
MarshalBytes/256 453ns ± 1% 447ns ± 1% ~ (p=0.056 n=5+5)
MarshalBytes/4096 4.10µs ± 1% 4.09µs ± 0% ~ (p=1.000 n=5+4)
CodeUnmarshal 3.16ms ± 2% 3.02ms ± 1% -4.18% (p=0.008 n=5+5)
CodeUnmarshalReuse 2.64ms ± 3% 2.51ms ± 2% -4.81% (p=0.016 n=5+5)
UnmarshalString 65.4ns ± 4% 64.1ns ± 0% ~ (p=0.190 n=5+4)
UnmarshalFloat64 59.8ns ± 5% 58.9ns ± 2% ~ (p=0.222 n=5+5)
UnmarshalInt64 51.7ns ± 1% 50.0ns ± 2% -3.26% (p=0.008 n=5+5)
EncodeMarshaler 23.6ns ±11% 20.8ns ± 1% -12.10% (p=0.016 n=5+4)
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>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Partially fixes https://github.com/golang/go/issues/38674
The first commit has the actual unification, the second commit just cleans things up by moving shared code into its own package for clarity.
Change-Id: I85067f8b247df02f94684ec1297a1a42263bba0c
GitHub-Last-Rev: 370a4ecad3
GitHub-Pull-Request: golang/go#52315
Reviewed-on: https://go-review.googlesource.com/c/go/+/399542
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
