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Commit Graph

52070 Commits

Author SHA1 Message Date
Austin Clements
60178e6240 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.

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>
2022-04-25 18:12:08 +00:00
Austin Clements
8619d3b2ec runtime: fix stack-move sensitivity in some tests
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>
2022-04-25 18:06:52 +00:00
Park Zhou
12763d141d 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>
2022-04-25 15:49:44 +00:00
Than McIntosh
94f25ec949 debug/pe: fix off by one error in valid symbol index test
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>
2022-04-25 15:42:53 +00:00
Than McIntosh
6b1d9aefa8 crypto/ed25519: test fixup
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>
2022-04-25 14:52:51 +00:00
Robert Findley
8140a605fe 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>
2022-04-25 13:37:03 +00:00
Meng Zhuo
96c8cc7fea runtime: add ABIInternal to strhash and memhash on riscv64
This CL fixes regression of strhash and memhash on riscv64

Change-Id: Icc10431a8199c8b1eb7b440cb42be4e53420e171
Reviewed-on: https://go-review.googlesource.com/c/go/+/362134
Run-TryBot: mzh <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
2022-04-24 01:22:21 +00:00
Joel Sing
e6dfdbd11d 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>
2022-04-23 14:26:25 +00:00
eric fang
9717e8f80f 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>
2022-04-23 05:38:56 +00:00
Keith Randall
7c680974c6 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>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Jonathan Albrecht <jonathan.albrecht@ibm.com>
2022-04-22 22:38:00 +00:00
Ian Lance Taylor
0bf545e51f 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>
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Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2022-04-22 22:35:03 +00:00
Bryan C. Mills
8e1a9c34ab 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.)

Fixes #52492.

Change-Id: I9e7874985e2820a6a4b703abe4f8e2035d5138c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/401575
Run-TryBot: Bryan Mills <bcmills@google.com>
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2022-04-22 21:27:09 +00:00
Michael Pratt
3e732411e5 runtime/internal/syscall: use ABIInternal for Syscall6 on amd64
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>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2022-04-22 19:53:07 +00:00
Michael Pratt
808d40d780 syscall: define Syscall6 in terms of RawSyscall6 on linux
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>
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2022-04-22 19:02:29 +00:00
Dmitri Shuralyov
534a911338 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>
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Reviewed-by: Michael Pratt <mpratt@google.com>
2022-04-22 17:22:12 +00:00
Robert Findley
3227501364 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>
2022-04-22 15:46:57 +00:00
Robert Findley
65d7345e8b go/types: introduce the error_ type to match types2
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>
TryBot-Result: Gopher Robot <gobot@golang.org>
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2022-04-22 15:46:52 +00:00
Robert Findley
1899472647 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>
2022-04-22 15:44:57 +00:00
Bryan Mills
507b70d1e8 Revert "cmd/compile: enable Asan check for global variables"
This reverts CL 321715.

Reason for revert: broke cmd/go.TestScript/install_msan_and_race_require_cgo on several builders.

Change-Id: Ia0392de555d6e973960769a0e4709f0193d16706
Reviewed-on: https://go-review.googlesource.com/c/go/+/401755
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
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2022-04-22 13:59:32 +00:00
Bryan Mills
440c9312c8 Revert "net: permit use of Resolver.PreferGo, netgo on Windows and Plan 9"
This reverts CL 400654.

Reason for revert: broke net.TestGoLookupIP on the darwin-amd64-nocgo builder.

Updates #33097.

Change-Id: Idaf94eda88c9d4401e667a4d31c00ce376d91909
Reviewed-on: https://go-review.googlesource.com/c/go/+/401754
Run-TryBot: Bryan Mills <bcmills@google.com>
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2022-04-22 13:39:44 +00:00
Archana R
78fb1d03d3 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.

POWER9:
name               old time/op  new time/op  delta
BytesCompare/1     4.60ns ± 0%  5.49ns ± 0%  +19.27%
BytesCompare/2     4.68ns ± 0%  5.46ns ± 0%  +16.71%
BytesCompare/4     6.58ns ± 0%  5.49ns ± 0%  -16.58%
BytesCompare/8     4.89ns ± 0%  5.46ns ± 0%  +11.64%
BytesCompare/16    5.21ns ± 0%  4.96ns ± 0%   -4.70%
BytesCompare/32    5.09ns ± 0%  4.98ns ± 0%   -2.14%
BytesCompare/64    6.40ns ± 0%  5.96ns ± 0%   -6.84%
BytesCompare/128   11.3ns ± 0%   8.1ns ± 0%  -28.09%
BytesCompare/256   15.1ns ± 0%  12.8ns ± 0%  -15.16%
BytesCompare/512   26.5ns ± 0%  23.3ns ± 5%  -12.03%
BytesCompare/1024  50.2ns ± 0%  41.6ns ± 2%  -17.01%
BytesCompare/2048  99.3ns ± 0%  86.5ns ± 0%  -12.88%

Change-Id: I24f93b2910591e6829ddd8509aa6eeaa6355c609
Reviewed-on: https://go-review.googlesource.com/c/go/+/362797
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Archana Ravindar <aravind5@in.ibm.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2022-04-22 12:12:38 +00:00
fanzha02
1e5987635c 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>
2022-04-22 04:42:23 +00:00
Meng Zhuo
be1d7388b3 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>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-22 01:41:25 +00:00
Bryan C. Mills
bf19163a54 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>
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2022-04-22 00:37:23 +00:00
Tobias Klauser
c9031a44b2 net/netip: fix Addr.Unmap reference in Addr.Is4 godoc comment
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>
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2022-04-22 00:25:08 +00:00
Ian Lance Taylor
575fd8817a 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>
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2022-04-22 00:10:17 +00:00
Brad Fitzpatrick
c510cd92cf net: permit use of Resolver.PreferGo, netgo on Windows and Plan 9
Fixes #33097

Change-Id: I2e55c7c113683814521f2068e0922b63c62ea5d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/400654
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2022-04-22 00:05:54 +00:00
Joe Tsai
67d6be139c 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()).

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>
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2022-04-21 23:45:36 +00:00
Derek Parker
3c29aca436 cmd/compile: Unify & improve struct comparisons
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>
2022-04-21 23:45:31 +00:00
mkontani
555bed939d test/typeparam: fix copyright message
Change-Id: Ia0a4be56d4e1fbfc73e6ce24f01a658c89a74adb
GitHub-Last-Rev: dd95e50c4b
GitHub-Pull-Request: golang/go#52393
Reviewed-on: https://go-review.googlesource.com/c/go/+/400694
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2022-04-21 23:41:49 +00:00
Carlo Alberto Ferraris
21e1ffe7bc 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
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2022-04-21 23:41:03 +00:00
Ian Lance Taylor
01837ca7eb 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
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2022-04-21 23:38:34 +00:00
Michael Pratt
bb004a179a 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
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2022-04-21 22:10:49 +00:00
Michael Pratt
889a902d21 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
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2022-04-21 21:18:18 +00:00
Daniel Martí
430ae97a25 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>
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2022-04-21 21:07:18 +00:00
Daniel Martí
f5af1e83a5 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
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-21 21:07:15 +00:00
Roland Shoemaker
4d96c3cdad 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>
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2022-04-21 21:06:36 +00:00
Michael Pratt
aac1d3a1b1 Revert "syscall: define Syscall in terms of RawSyscall on linux"
This reverts CL 388477, which breaks cmd/go
TestScript/cover_pkgall_runtime.

For #51087.
For #52472.

Change-Id: Id58af419a889281f15df2471c58fece011fcffbc
Reviewed-on: https://go-review.googlesource.com/c/go/+/401636
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2022-04-21 19:06:52 +00:00
Michael Pratt
d35ec0b899 Revert "syscall: define Syscall6 in terms of RawSyscall6 on linux"
This reverts CL 388478. Parent CL 388477 breaks cmd/go
TestScript/cover_pkgall_runtime.

For #51087.
For #52472.

Change-Id: Id5d5a4e138792cf130ecdcc6b996c8102d142a7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/401635
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2022-04-21 19:06:50 +00:00
Michael Pratt
347534343b Revert "runtime/internal/syscall: use ABIInternal for Syscall6 on amd64"
This reverts CL 401096. Grandparent CL 388477 breaks cmd/go
TestScript/cover_pkgall_runtime.

For #51087.
For #52472.

Change-Id: Ie82fe5f50975f66eb91fb0d01cd8bbbd0265eb4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/401634
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2022-04-21 19:06:49 +00:00
Ian Lance Taylor
a4ded4b5ff 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>
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2022-04-21 18:43:55 +00:00
Michael Matloob
f95db21332 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
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2022-04-21 18:22:57 +00:00
Michael Pratt
5b32a6f179 runtime/internal/syscall: use ABIInternal for Syscall6 on amd64
For #51087.

Change-Id: I25971760b63ec0d23d0f011521dd197d81a38976
Reviewed-on: https://go-review.googlesource.com/c/go/+/401096
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2022-04-21 18:07:33 +00:00
Michael Pratt
a56e2f672b syscall: define Syscall6 in terms of RawSyscall6 on linux
For #51087

Change-Id: I4a5b5cb74f12db8999c6ff0e98c3034b58af3959
Reviewed-on: https://go-review.googlesource.com/c/go/+/388478
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2022-04-21 18:07:25 +00:00
Michael Pratt
64e69d3925 syscall: define Syscall in terms of RawSyscall on linux
For #51087

Change-Id: I9de7e85ccf137ae73662759382334bcbe7208150
Reviewed-on: https://go-review.googlesource.com/c/go/+/388477
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2022-04-21 18:07:14 +00:00
Michael Pratt
f7b12ff6fb syscall: define RawSyscall in terms of RawSyscall6 on linux
For #51087

Change-Id: I63e07638507328efe33dbf7dd5f8a8b78890e037
Reviewed-on: https://go-review.googlesource.com/c/go/+/388476
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2022-04-21 18:07:03 +00:00
Michael Pratt
15602e8865 runtime/internal/syscall, syscall: replace RawSyscall6 with runtime implementation on linux
For #51087

Change-Id: I75a1bdeb5089454595f5ca04765a9c6e45cf9bd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/388475
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2022-04-21 18:06:56 +00:00
Michael Pratt
1de1c0d10d 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
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2022-04-21 18:06:48 +00:00
Michael Pratt
342b495301 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
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2022-04-21 18:06:38 +00:00
Michael Pratt
e25a5ce120 test: rename live_syscall.go to live_uintptrkeepalive.go
CL 388095 will change this file significantly. Move it preemptively to
ensure git tracks the move properly.

For #51087

Change-Id: I1408aecf8675723041b64e54cf44cdec38cc655c
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2022-04-21 18:06:26 +00:00