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Commit Graph

50516 Commits

Author SHA1 Message Date
Michael Pratt
f8779b9e75 runtime: rename _m_ to mp [generated]
_g_, _p_, and _m_ are primarily vestiges of the C version of the
runtime, while today we prefer Go-style variable names (generally gp,
pp, and mp).

This change replaces all remaining uses of _m_ with mp. There are very
few remaining and all replacements are trivial.

[git-generate]
cd src/runtime

rf 'mv canpanic._m_ canpanic.mp'
GOOS=solaris \
  rf 'mv semasleep._m_ semasleep.mp'
GOOS=aix GOARCH=ppc64 \
  rf 'mv semasleep._m_ semasleep.mp'

Change-Id: I83690f7b4d4dc57557963100e9a2560ff343f3e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/307813
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2021-10-26 20:12:32 +00:00
Dan Scales
b54bdd281e cmd/compile: clean up the switch statements in (*genInst).node()
There were two main outer switch statements in node() that can just be
combined. Also, for simplicity, changed an IsCmp() conditional into just
another case in the switch statement.

Also, the inner OCALL switch statement had a bunch of fairly duplicate
cases. Combined the cases that all had no special semantics, into a
single default case calling transformCall().

In the OCALL case in dictPass(), got rid of a check for OFUNCINST (which
will always have been removed by this point). Also, eliminated an assert
that could cause unneded failures. transformCall() should always be
called if the node op is still OCALL, so no need to assert on the ops of
call.X.

Added an extra test in issue47078.go, to explicitly check for case where
the X argument of a call is a DOTTYPE.

Change-Id: Ifb3f812ce12820a4ce08afe2887f00f7fc00cd2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/358596
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-26 20:08:41 +00:00
Katie Hockman
1dc77a38d2 internal/fuzz: tiny refactor+fix
Change-Id: I8db9c31ead3e5905b7f9d1faed36555e8aaa00cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/358054
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
Reviewed-by: Julie Qiu <julie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-26 19:04:53 +00:00
Mark Pulford
76cef81bcf cmd/go: stamp VCS commit time into binaries
Only Git and Mercurial are supported for now.

This CL also:
- Skips tagging "revision" and "committime" for empty repositories.
- Stores the full Mercurial changeset ID instead of the short form.

Fixes #37475

Change-Id: I62ab7a986d1ddb2a0e7166a6404b5aa80c2ee387
Reviewed-on: https://go-review.googlesource.com/c/go/+/356251
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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2021-10-26 17:10:45 +00:00
Robert Findley
1b2362bb83 cmd/compile/internal/typecheck: update doc for the 1.18 export format
Update the documentation in iexport.go to use the word 'Constraint'
rather than 'Bound', and to account for recent changes to the export
format.

Change-Id: I83fbcd336d5f865af804bc8bef4f5d997cd9f325
Reviewed-on: https://go-review.googlesource.com/c/go/+/358547
Trust: Robert Findley <rfindley@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-26 15:20:53 +00:00
Cuong Manh Le
283d8a3d53 all: use reflect.{Pointer,PointerTo}
Updates #47651
Updates #48665

Change-Id: I69a87b45a5cad7a07fbd855040cd9935cf874554
Reviewed-on: https://go-review.googlesource.com/c/go/+/358454
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2021-10-26 14:24:17 +00:00
Dmitri Shuralyov
a2b8c186f6 all: update vendored golang.org/x/tools
Pull in CL 358034 (and some more changes with passing tests) with:

	go get -d golang.org/x/tools@f916b54
	go mod tidy
	go mod vendor

This teaches x/tools/cmd/bundle and the package loader it uses about
the new export data version.

Fixes #49159.

Change-Id: Icc36e77e602b1cd2da03708f20d05a66fcf693cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/358620
Trust: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-26 14:05:47 +00:00
Paul E. Murphy
1e2820a6d7 cmd/internal/obj/ppc64: fix usage of CR bit arguments
CR bits and CR fields should be treated separately. Some instructions
modify an entire CR, a CR field, or a single CR bit.

Add a new argument class for CR bits, and teach the assembler the
recognize them as names like CR0LT or CR2SO, and update the CR
bit logic instructions to use them. They will no longer accept
register field (CRn) type arguments.

Fixes #46422
Change-Id: Iaba127d88abada0c2a49b8d3b07a976180565ae4
Reviewed-on: https://go-review.googlesource.com/c/go/+/357774
Run-TryBot: Paul Murphy <murp@ibm.com>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-26 11:58:05 +00:00
Tobias Klauser
23fdd7f0f7 syscall: add utimensat libc wrapper on darwin
Add utimensat as a wrapper around the libc function of the same name.
utimensat was added in macOS 10.13 which is the minimum supported
release since Go 1.17 dropped support for macOS 10.12.

This also allows to drop the fallback to setattrlistTimes which was
used to set timestamps with nanosecond resolution before utimensat could
be used, see #22528 and CL 74952.

Updates #22528

Change-Id: I87b6a76acf1d642ceede9254f7d9d06dddc3fd71
Reviewed-on: https://go-review.googlesource.com/c/go/+/358274
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 05:05:24 +00:00
Tobias Klauser
ec6c00418c syscall: use fcntl F_DUP2FD_CLOEXEC in forkAndExecInChild on illumos
Use fcntl(oldfd, F_DUP2FD_CLOEXEC, newfd) to duplicate the file
descriptor and mark is as close-on-exec instead of dup2 & fcntl.

Illumos implements dup3 like this in libc.

Change-Id: I9782bce553ffb832e9b1a12bbf3c0a40c821f56e
Reviewed-on: https://go-review.googlesource.com/c/go/+/358374
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 05:02:53 +00:00
fanzha02
adfb85b315 runtime, runtime/asan: add asan runtime support
These are the runtime support functions for letting Go code interoperate
with the C/C++ address sanitizer. Calls to asanread/asanwrite are now
inserted by the compiler with the -asan option.  Calls to
asanunpoison/asanpoison will be from other runtime functions in a
subsequent CL.

Updates #44853.

Change-Id: I9e8fc0ce937828bc7f4a8b6637453ddc3862c47b
Reviewed-on: https://go-review.googlesource.com/c/go/+/298613
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-26 01:22:47 +00:00
Fannie Zhang
49fda9e4f5 cmd/go: add -asan option
The -asan option compiles Go code to use the address sanitizer.  This is
intended for use when linking with C/C++ code compiled with -fsanitize=address.
When memory blocks are passed back and forth between C/C++ and Go, code in
both languages will agree as to whether the memory is validly allocated or not,
and will report errors for any use of invalid memory.

Updates #44853.

Change-Id: I0209002ef795cc1c823daae557fb80c906158db3
Reviewed-on: https://go-review.googlesource.com/c/go/+/298612
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-26 01:18:46 +00:00
fanzha02
41f74079a9 cmd/internal/obj/arm64: add a restriction on move constant instructions
For MOVK/MOVN/MOVZ instructions, the assembler does not accept zero
shifts, and the CL 275812 added the error check. This CL adds this
restriction to the document.

Change-Id: I8818d76ca2f11dade2307f3678ca521f4e64d164
Reviewed-on: https://go-review.googlesource.com/c/go/+/312210
Trust: fannie zhang <Fannie.Zhang@arm.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-26 01:07:41 +00:00
gosoon
0ec1b62ee2 doc/go1.18.html: fix a typo
gofmt -> <code>gofmt</code>

Change-Id: Idc01b01d8eb185f5e378000d11d622935b14db6e
GitHub-Last-Rev: 8d55dc7b86
GitHub-Pull-Request: golang/go#49084
Reviewed-on: https://go-review.googlesource.com/c/go/+/357251
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-10-26 00:38:52 +00:00
Gusted
b36b001ff1 container/list: remove unnecessary code
Remove a unnecessary statement in the test function, the variables
aren't checked afterwards. Also remove return statements in helper
functions and remove the declaration that a the helper function return a
value. The return value isn't used in the current state of code

Change-Id: I5bc384104c1002c4138e0894938778ae9710ce4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/358714
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>
2021-10-26 00:30:24 +00:00
Cherry Mui
e9eb66da30 cmd/internal/obj/riscv: don't split ADD to SP to two adds
When adding a large constant to a register we generate two adds,
we may generate two ADD instructions if the constant does not fit
in one ADD but does fit in two. This is generally fine except that
if the target register is SP (such as in function prologues or
epilogues for functions with large frames), this creates an
intermediate state that the SP is not 0 nor the full frame size.
For signal safety (preemption signal and profiling signal) we
require that the frame is either not created at all or fully
created, meaning that the SP must be written in a single
instruction. Splitting to two adds breaks the requirement. So not
splitting it.

(We could mark such instructions not async-preemptible. But
profiling signal can still cause problems.)

(We could generate "ADD $c1, SP, Rtmp; ADD $c2; Rtmp; SP" to save
an instruction if that is desired, while still ensuring that SP
is written in a single instruction.)

May fix flaky failures like https://build.golang.org/log/11537ec020a902b0ec0fc065f61161b729eb9880

Change-Id: I5cf38a6a028afe01aa3b6eeb163487bbd504b64f
Reviewed-on: https://go-review.googlesource.com/c/go/+/358436
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-25 23:28:03 +00:00
Dan Scales
fd2f4b58b3 cmd/compile: update the export version for generics
Bump the export version to a new value iexportVersionGo1_18 (2). This
will give a better error message when old compilers/tools encounter the
new export format (that includes parameterized types and functions).

We are also making a breaking change in the format:
 - a 'kind' byte is added to constant values

Also updated tinter() to pass the implicit bit through during type
substitution.

Tested that all tests still pass if the iexportVersionCurrent is changed
back to 1 in typecheck/iexport.go, iimporter/iimport.go, and
gcimporter/iimport.go

Updates #47654

Change-Id: I1dbeb167a97f6c7e0b7e0c011d6bada5db312b36
Reviewed-on: https://go-review.googlesource.com/c/go/+/357049
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Trust: Dan Scales <danscales@google.com>
2021-10-25 22:17:34 +00:00
fanzha02
85b3b4ee03 cmd/compile: add -asan option
The -asan option causes the compiler to add instrumentation for the
C/C++ address sanitizer.  Every memory read/write will be replaced
by a call to asanread/asanwrite.

This CL also inserts asan instrumentation during SSA building.

This CL passes tests but is not usable by itself. The actual
implementation of asanread/asanwrite in the runtime package, and
support for -asan in the go tool and tests, will follow in subsequent
CLs.

Updates #44853.

Change-Id: Ia18c9c5d5c351857420d2f6835f0daec2ad31096
Reviewed-on: https://go-review.googlesource.com/c/go/+/298611
Trust: fannie zhang <Fannie.Zhang@arm.com>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-25 21:51:20 +00:00
Ian Lance Taylor
60c3069dd8 internal/poll: avoid tiny allocator for splicePipe
We want to set a finalizer on splicePipe, so make it large enough to
not use the tiny allocator. Otherwise the finalizer will not run until
the rest of the tiny allocation can be freed. This only matters on
32-bit systems.

Fixes #48968

Change-Id: I8eb3c9f48fdccab7dc79c5b918d4257b6151ee91
Reviewed-on: https://go-review.googlesource.com/c/go/+/358114
Trust: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-25 21:03:33 +00:00
Cherry Mui
e35b5b25d9 cmd/compile: fix typo in comment in CL 358435
Change-Id: I0d8128668fc7a80b29aabc58dbc9a2929b889ec9
Reviewed-on: https://go-review.googlesource.com/c/go/+/358614
Trust: Cherry Mui <cherryyz@google.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2021-10-25 21:02:43 +00:00
Keith Randall
f92c8f07ac cmd/link: escape % characters in symbols when reporting errors
Generic function symbols sometimes have % in them, like:

    main.B2[%2eshape.string_0].m2·f

Which confuses this code because it doesn't esacpe % when
using this string as a format string, instead of a format argument.

Or could we get rid of the . -> %2e rewrite somehow?
I think it comes from LinkString.

Change-Id: I3275501f44cf30485e9d4577e0dfa77996d4939e
Reviewed-on: https://go-review.googlesource.com/c/go/+/357837
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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Reviewed-by: Dan Scales <danscales@google.com>
2021-10-25 20:41:00 +00:00
Keith Randall
72b6a89ca5 cmd/compile: revert most of CL 349169
The method of using references to dictionaries to hold methods
live during linker deadcode elimination wasn't working very well.
I implemented a new scheme in the CL below this, so this CL strips
out the old method.

The new method has the added benefit of having 0 runtime overhead
(unlike the stuff we're ripping out here, which does have a small overhead).

Update #48047

Change-Id: I68ac57119792d53c58f1480f407de6ab2bb53211
Reviewed-on: https://go-review.googlesource.com/c/go/+/357836
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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2021-10-25 20:40:00 +00:00
Keith Randall
0ae0d5c62e cmd/compile: remove MarkUsedIfaceMethodIndex mechanism
We don't need it any more, after CL 357835.

Change-Id: I1ff5f24b5540c3e80c4b35be8215a1c378952274
Reviewed-on: https://go-review.googlesource.com/c/go/+/357894
Trust: Keith Randall <khr@golang.org>
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2021-10-25 20:39:31 +00:00
Keith Randall
c26a32a500 cmd/compile,cmd/link: introduce generic interface call relocations
To capture the fact that a method was called on a generic interface,
so we can make sure the linker doesn't throw away any implementations
that might be the method called.

See the comment in reflect.go for details.

Fixes #49049

Change-Id: I0be74b6e727c1ecefedae072b149f59d539dc1e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/357835
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-10-25 20:39:17 +00:00
Richard Musiol
252324e879 cmd/link: increase reserved space for passing env on wasm
On wasm, the wasm_exec.js helper passes the command line arguments and
environment variables via a reserved space in the wasm linear memory.
Increase this reserved space from 4096 to 8192 bytes so more environment
variables can fit into the limit.

Later, after https://golang.org/cl/350737 landed, we can switch to the
WASI interface for getting the arguments and environment. This would
remove the limit entirely.

Fixes #49011

Change-Id: I48a6e952a97d33404ed692c98e9b49c5cd6b269b
Reviewed-on: https://go-review.googlesource.com/c/go/+/358194
Trust: Richard Musiol <neelance@gmail.com>
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2021-10-25 20:08:25 +00:00
Katie Hockman
8c94aa40e6 cmd/go/testdata/script: fix flaky test_fuzz_fuzztime test
Previously, the test would panic if the short timeout
was reached before fuzzing began. Increasing the
timeout should stop this test from being flaky.

Fixes #49046

Change-Id: Iaa0b3b3e8ea29d9a42ab5fc1c801fc73fffe1675
Reviewed-on: https://go-review.googlesource.com/c/go/+/358055
Trust: Katie Hockman <katie@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-25 18:59:26 +00:00
Agniva De Sarker
f47335e653 crypto/tls: add Conn.NetConn method
NetConn method gives us access to the underlying net.Conn
value.

Fixes #29257

Change-Id: I68b2a92ed9dab4be9900807c94184f8c0aeb4f72
Reviewed-on: https://go-review.googlesource.com/c/go/+/325250
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Trust: Agniva De Sarker <agniva.quicksilver@gmail.com>
Trust: Katie Hockman <katie@golang.org>
2021-10-25 18:46:45 +00:00
Cherry Mui
9012996a9a cmd/compile: don't clobber LR for tail calls
When doing a tail call the link register is live as the callee
will directly return to the caller (of the function that does the
tail call). Don't allocate or clobber the link register.

Fixes #49032.

Change-Id: I2d60f2354e5b6c14aa285c8983a9786687b90223
Reviewed-on: https://go-review.googlesource.com/c/go/+/358435
Trust: Cherry Mui <cherryyz@google.com>
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2021-10-25 17:46:41 +00:00
wdvxdr
95372efc4d cmd/compile: use SetInit instead of *PtrInit
Change-Id: Ie802ff27b611ed248d7b14f6e972e6300c181f43
Reviewed-on: https://go-review.googlesource.com/c/go/+/358316
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
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2021-10-25 17:29:14 +00:00
Robert Findley
bc0eb5789e cmd/compile/internal/typecheck: record whether an interface is implicit
In preparation for capturing the implicit interface bit in export data,
thread through the IsImplicit property from types2 into typecheck.

Change-Id: I9b46fe73de102935a127e6ececaacd76738b557e
Reviewed-on: https://go-review.googlesource.com/c/go/+/357109
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-10-25 17:18:40 +00:00
Robert Findley
70ffd852cc go/types: remove subscripts from type parameter names
Now that we've removed the necessity for subscripts in importers, we can
effectively eliminate them from the the type parameter API by removing
them from the type string.

Change-Id: Ic4491b0dea27b0e0ce2d0636dccfaf05168ef9e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/357814
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
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2021-10-25 17:09:57 +00:00
Charlotte Brandhorst-Satzkorn
52b10ab794 net/http: correct Content-Length parsing for js/wasm
The Content-Length was incorrectly set to 0 for ill-formed and invalid
values. In these cases, return an error.

If the Content-Length header was omitted, it was incorrectly set to 0.
In this case, set the Content-Length value to -1.

Fixes #49108

Change-Id: I24fe9a31ed5b6ddb53f2b2bd10f2c84e428823e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/358134
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Trust: David Crawshaw <crawshaw@golang.org>
2021-10-25 17:02:16 +00:00
wdvxdr
c6e82e5808 cmd/compile: fix inlining labeled switch statements
CL 357649 fixes inlining labeled FOR/RANGE loops,
we should do same translation for inlined SWITCH's label

Fixes #49145

Change-Id: I9a6f365f57e974271a1eb279b38e81f9b5148788
Reviewed-on: https://go-review.googlesource.com/c/go/+/358315
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-25 16:07:11 +00:00
Michael Pratt
2c66cab8a7 testing: skip extra -count iterations if there are no tests
When running benchmarks with high -count and no tests (either at all or
filtered with -run), the time for runTests to check for tests -count
times can add a significant delay to starting benchmarks.

To avoid this delay, make runTests bail out on the second iteration if
the first found no tests to run. We expect the same tests to run every
time, so there is no reason to duplicate work.

One caveat: the testing docs do not explicitly require the same subtests
to be run on every call, so this could break tests that depend on
multiple runs to actually run all tests. I consider such tests invalid,
but some may exist.

Fixes #49050

Change-Id: I7b34f3832b31493cc089ee0555e231f4dc690154
Reviewed-on: https://go-review.googlesource.com/c/go/+/356669
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-25 15:43:33 +00:00
Robert Griesemer
89cc528e43 cmd/compile/internal/types2: better error messages for empty type sets
- change _TypeSet.hasTerms() to report if a type set has actual types
  (excluding a "universe" term)
- handle empty type set type arguments correctly
- bring comments up-to-date in Checker.satisfies

Change-Id: I87f9a1096ebb21a1b08c87a9b59f400f3bc2f040
Reviewed-on: https://go-review.googlesource.com/c/go/+/358175
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-25 15:31:40 +00:00
Austin Clements
1ed060cf87 testing: reference benchmark format spec
This updates the testing package documentation to reference the
specification for the benchmark format, and points users to our
standard tools for working with benchmark data. (It's somewhat
remarkable how widely used benchstat appears to be given that we don't
mention it anywhere!)

Change-Id: Idbb4416d2fde9606ea7e6c15595f3b9e6a38f3b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/357589
Trust: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-25 14:50:31 +00:00
Olivier Wulveryck
fcd2d9cd75 image/draw: improve performances if mask is *image.Alpha
The existing DrawMask method is generic and is therefore calling the At().RGBA() method for every pixel of the mask and the source.
Do a specific implementation when the mask is *image.Alpha (which is
common) and use use the PixOffset method to increase performances.

name                old time/op  new time/op  delta
RGBA2-12            1.60ms ± 0%  1.13ms ± 1%  -29.16%  (p=0.008 n=5+5)
GenericMaskOver-12   915µs ± 4%   926µs ± 1%     ~     (p=0.190 n=5+4)
RGBA64Over-12       1.53ms ± 3%  1.21ms ± 2%  -20.74%  (p=0.008 n=5+5)
GrayOver-12         1.36ms ± 2%  1.01ms ± 7%  -26.27%  (p=0.008 n=5+5)

Fixes: #46395
Change-Id: Iaeaa8cfcc6a3fe93eb19b361f3bf076e41cac5b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/323749
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Trust: Nigel Tao <nigeltao@golang.org>
Trust: Andrew Gerrand <adg@golang.org>
Run-TryBot: Nigel Tao <nigeltao@golang.org>
2021-10-25 12:07:15 +00:00
Cuong Manh Le
7b554575e4 cmd/compile: factor out code to remove phi argument
CL 358117 fixed a bug that Phi's argument wasn't updated correctly after
removing a predecessor of Block. This CL factor out the code that
updates phi argument into a Block's method, so it's easier to use,
maintain and hopefully prevent that kind of bug in the future.

Change-Id: Ie9741e19ea28f56860425089b6093a381aa10f5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/357964
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-25 03:00:02 +00:00
Cuong Manh Le
f686f6a963 cmd/compile: remove Value.RemoveArg
It's only used in two places:

 - The one in regalloc.go can be replaced with v.resetArgs()
 - The one in rewrite.go can be open coded

and can cause wrong usage like the bug that CL 358117 fixed.

Change-Id: I125baf237db159d056fe4b1c73072331eea4d06a
Reviewed-on: https://go-review.googlesource.com/c/go/+/357965
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-25 02:59:35 +00:00
Keith Randall
8dbf3e9393 cmd/compile: fix fuse pass to do CFG surgery correctly
removePred and removeArg do different things. removePred moves the last
predecessor to index k, whereas removeArg slides all the args k or
greater down by 1 index.

Kind of unfortunate different behavior in things named similarly.

Fixes #49122

Change-Id: I9ae409bdac744e713f4c121f948e43db6fdc8542
Reviewed-on: https://go-review.googlesource.com/c/go/+/358117
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-10-23 20:23:35 +00:00
Robert Griesemer
16318df4a2 cmd/compile/internal/types2: comp literals to accept type sets with single underlying types
Change-Id: Ib51bcdf023910d244739ec176880a16e700851e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/357915
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:18:19 +00:00
Robert Griesemer
12e4404a0a cmd/compile/internal/types2: slice exprs to accept type sets with single underlying types
Change-Id: Ib9bd08ab6153129aaf8b77b41fc6ea302d0c1589
Reviewed-on: https://go-review.googlesource.com/c/go/+/357779
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:18:15 +00:00
Robert Griesemer
c526cf8c1e cmd/compile/internal/types2: range clause to accept type sets with single underlying types
This generalizes range clauses. Removed some dead code and cleaned
up the surrounding bits.

Change-Id: Icd8384205afa3f52b7e7df9abed5de2bb556861d
Reviewed-on: https://go-review.googlesource.com/c/go/+/357778
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:18:09 +00:00
Robert Griesemer
2d205ebb96 cmd/compile/internal/types2: make built-in to accept type sets with single underlying types
This generalizes make the same way copy was generalized and eliminates
a use of optype.

Change-Id: I8221abd53d77dde8ead47c0075c13fd2a3221642
Reviewed-on: https://go-review.googlesource.com/c/go/+/357776
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:18:04 +00:00
Robert Griesemer
3cd28baffd cmd/compile/internal/types2: factor out slice elem computation for copy built-in
Implement singleUnder[String] which determines a single underlying type
for a given type: either the underlying type, or the single underlying
type for a type parameter, if it exists. Use singleUnder[String] instead
of optype for copy built-in.

This CL removes a dependency on optype and also makes the copy built-in
slighty more general for generic arguments (the source argument may be
constrained by a slice or string simultaneously).

Change-Id: Ia329e96afc69a09d2ca3b1f82fe712d4f7ba1d9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/357413
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 16:17:58 +00:00
Robert Griesemer
b0f7eb6c0d cmd/go: update test script for reformatted error message (fix long builds)
TBR=iant

Change-Id: Ic72af52e5ff8d28f8102c07b03e4930df61445ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/358115
Trust: Robert Griesemer <gri@golang.org>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-23 12:44:47 +00:00
Cuong Manh Le
85d2751d2e cmd/compile: prevent compiling closures more than once
Since CL 282892, functions are always compiled before closures. To do
that, when walking the closure, it is added to its outer function queue
for scheduling compilation later. Thus, a closure may be added to queue
more than once, causing the ICE dues to being compiled twice.

To fix this, catching the re-walking of the closure expression and do
not add it to the compilation queue.

Fixes #49029

Change-Id: I7d188e8f5b4d5c4248a0d8e6389da26f1084e464
Reviewed-on: https://go-review.googlesource.com/c/go/+/357960
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2021-10-23 06:36:16 +00:00
Cuong Manh Le
6c200017bf doc: document new reflect.UnsafePointer function
Updates #40592

Change-Id: If66629e47ca9859128ee3ad8fb584e022d7a6982
Reviewed-on: https://go-review.googlesource.com/c/go/+/356255
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
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2021-10-23 06:31:02 +00:00
fanzha02
ae4d67c89d cmd/link: add -asan option
The -asan option causes the linker to link against the runtime/asan
package in order to use the C/C++ address sanitizer.

This CL passes tests but is not usable by itself.  The actual
runtime/asan package, and support for -asan in the go tool and the
compiler, and tests, are in separate CLs.

Updates #44853.

Change-Id: Ifc6046c1f75ba52777cbb3d937a4b66e91d5798d
Reviewed-on: https://go-review.googlesource.com/c/go/+/298610
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-10-22 21:48:34 +00:00
Robert Griesemer
5d414d180b cmd/compile/internal/types2: more detailed error messages for generic conversions
- slightly refactor convertibleTo and convertibleToImpl
- provide ability to return a conversion failure cause
- add detailed cause for generic conversions

For #47150.

Change-Id: Ie97d89be0234414ef4df22a6920e18acc944a102
Reviewed-on: https://go-review.googlesource.com/c/go/+/357249
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-22 21:26:30 +00:00