Add a -pgo flag for "go build" (and other build actions), to
specify the file path of a profile used for PGO. Special name
"off" turns off PGO.
The given profile path is passed to the compiler.
The build cache is sensitive to the content of the given PGO
profile.
TODO: auto mode.
For #55022.
Change-Id: Ieee1b131b4c041f9502fd0a1acf112f3e44246be
Reviewed-on: https://go-review.googlesource.com/c/go/+/438736
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
The -C flag is like tar -C or make -C: it changes to the named directory
early in command startup, before anything else happens.
Fixes#50332.
Change-Id: I8e4546f69044cb3a028d4d26dfba482b08cb845d
Reviewed-on: https://go-review.googlesource.com/c/go/+/421436
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Enable -msan flag on freebsd/amd64 and amend PIE comment in
internal/work/init.go to indicate that MSAN requires PIE on all platforms
except linux/amd64.
R=go1.20
For #53298
Change-Id: I93d94efa95d7f292c23c433fb1d3f4301d820bde
Reviewed-on: https://go-review.googlesource.com/c/go/+/411275
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
The flag is now removed from `go build` and `go test`.
It has been deprecated since Go 1.16, printing a warning message.
The idea was to fully delete it in Go 1.17, but that didn't happen.
First, delete the BuildI variable and its flag declarations,
as well as all the bits of docs that mentioned the flag.
Second, delete or simplify the code paths that used BuildI.
Third, adapt the tests to the removed flag.
Some of them are removed, like test_relative_import_dash_i.txt and
TestGoTestDashIDashOWritesBinary, as they centered around the flag.
The rest are modified to not cover or use the flag.
Finally, change cmd/dist to no longer use `go install -i`.
The purpose of the flag was that, when bootstrapping the toolchain,
all of its dependencies would also be installed as object files.
When removing the use of the -i flags, the checkNotStale call right
after building toolchain3 would fail as expected,
because runtime/internal/sys is now only up to date in the build cache.
Luckily, that's not a problem: we run `go install std cmd` right after,
so all standard library packages will be installed as object files.
Move the checkNotStale call after that install command.
Fixes#41696.
Change-Id: I5d8139f18aaee07da886d483e663f3f2f00d5f3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/416094
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gopher Robot <gobot@golang.org>
If GOEXPERIMENT=coverageredesign is in effect, introduce a new
top-level '-cover' option to "go build" to turn on new-style hybrid
code coverage instrumentation. Similarly, use the new instrumentation
for "go test -cover".
The main effects of "-cover" under the hood are to instrument files at
the package level using cmd/cover and to pass additional options to
the compiler when building instrumented packages.
The previous workflow for "go tool -cover mypkg" would expand to a
series of "go tool cover" commands (one per file) followed by a single
package compilation command to build the rewritten sources.
With the new workflow, the Go command will pass all of the Go files in
a package to the cover tool as a chunk (along with a config file
containing other parameters), then the cover tool will write
instrumented versions of the sources along with another "output"
config with info on coverage variable names for the the compiler. The
Go command will then kick off the compiler on the modified source
files, also passing in the config file generated by cmd/cover.
Updates #51430.
Change-Id: Id65621ff6a8c70a30168c1412c2d6f805ff3b9e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/355452
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Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
For proposal #41583, add a new 'go test -skip' flag to make it easy
to disable specific tests, benchmarks, examples, or fuzz targets.
Fixes#41583.
Change-Id: Id12a6575f505dafdce4a149aedc454a002e93afa
Reviewed-on: https://go-review.googlesource.com/c/go/+/421439
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
This does not enable any new functionality. It should
behave identically to GOPPC64=power9.
Updates #44549
Change-Id: I9a860544527fcfe97cbaf89686459d40dcf9593e
Reviewed-on: https://go-review.googlesource.com/c/go/+/352791
Run-TryBot: Paul Murphy <murp@ibm.com>
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Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Following proposal discussion in #38687, add go generate -skip
to allow easier skipping of specific //go:generate directives.
Fixes#38687.
Change-Id: Ied5b4042965dd6a2b93c1c517045fccae2d95c3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/421440
Auto-Submit: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Rob Pike <r@golang.org>
This PR fixes a simple typo. It adds a space after a comma. Noticed while looking at `go help test` output.
Change-Id: I5b54f4da0d08a056bffc04899983d858dfa91043
GitHub-Last-Rev: da9cab5eb9
GitHub-Pull-Request: golang/go#53931
Reviewed-on: https://go-review.googlesource.com/c/go/+/418034
Reviewed-by: Bryan Mills <bcmills@google.com>
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The go list -m and go mod download commands now have a -reuse flag,
which is passed the name of a file containing the JSON output from a
previous run of the same command. (It is up to the caller to ensure
that flags such as -versions or -retracted, which affect the output,
are consistent between the old and new run.)
The new run uses the old JSON to evaluate whether the answer is
unchanged since the old run. If so, it reuses that information,
avoiding a costly 'git fetch', and sets a new Reuse: true field in its
own JSON output.
This dance with saving the JSON output and passing it back to -reuse
is not necessary on most systems, because the go command caches
version control checkouts in the module cache. That cache means that a
new 'git fetch' would only download the commits that are new since the
previous one (often none at all).
The dance becomes important only on systems that do not preserve the
module cache, for example by running 'go clean -modcache' aggressively
or by running in some environment that starts with an empty file
system.
For #53644.
Change-Id: I447960abf8055f83cc6dbc699a9fde9931130004
Reviewed-on: https://go-review.googlesource.com/c/go/+/411398
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Clarify that the //go:build line is an expression of constraints,
not a constraint itself.
Fixes#53308
Change-Id: Ib67243c6ee5cfe3b688c12b943b5e7496f686035
Reviewed-on: https://go-review.googlesource.com/c/go/+/411697
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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>
Reviewed-by: David Chase <drchase@google.com>
Also align Retracted documentation with actual type of []string
Fixes#51876
Change-Id: I3b34e53424aa7ee5330eb71adac23510fff91798
Reviewed-on: https://go-review.googlesource.com/c/go/+/394677
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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In https://golang.org/cl/263542 we added BuildID to the Package struct
in the docs for "go list", correctly pointing out that it's only set
when -export is used.
Further down, the doc details the -export flag on its own.
It already mentioned the Export field, and we forgot to add a mention to
BuildID as well. Do that.
Change-Id: I5838a8900edae8012fe333937d86baea3066c5f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/392114
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Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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.
(This is a redo of CL 401775 with a fix for a build break due to an
intervening commit that removed the internal/execabs package.)
Updates #44853.
Change-Id: I719d4ef2b22cb2d5516e1494cd453c3efb47d6c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/403851
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
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Reviewed-by: Ian Lance Taylor <iant@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.
Updates #44853.
Change-Id: Ib877a817209ab2be68a8e22c418fe4a4a20880fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/401775
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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>
When we added VCS stamping in the Go 1.18 release, we defaulted to
-buildvcs=true, on the theory that most folks will actually want VCS
information stamped.
We also made -buildvcs=true error out if a VCS directory is found and
no VCS tool is available, on the theory that a user who builds with
'-buildvcs=true' will be very surprised if the VCS metadata is
silently missing.
However, that causes a problem for CI environments that don't have the
appropriate VCS tool installed. (And we know that's a common situation
because we're in that situation ourselves — see #46693!)
The new '-buildvcs=auto' setting provides a middle ground: it stamps
VCS information by default when the tool is present (and reports
explicit errors if the tool errors out), but omits the metadata
when the tool isn't present at all.
Fixes#51748.
Updates #51999.
Change-Id: Iebc955c2af0abca9b7517f62ca48b1d944eb2df4
Reviewed-on: https://go-review.googlesource.com/c/go/+/398855
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Auto-Submit: Bryan Mills <bcmills@google.com>
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Code generators may reasonably expect to find the GOROOT for which the
code is being generated.
If the generator invokes 'go run' (which ought to be reasonable to do)
and the user has set 'GOFLAGS=trimpath' (which also ought to be
reasonable), then either 'go generate' or 'go run' needs to set GOROOT
explicitly.
I would argue that it is more appropriate for 'go generate' to set
GOROOT than for 'go run' to do so, since a user may reasonably invoke
'go run' to reproduce a user-reported bug in a standalone Go program,
but should not invoke 'go generate' except to regenerate code for a Go
package.
Updates #51461.
Change-Id: Iceba233b4eebd57c40cf5dcd4af9031d210dc9d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/399157
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]
Reformat alldocs.go using the new doc comment formatter.
This file is so large it gets its own gofmt CL.
For #51082.
Change-Id: Ie14cf1aad776e6f4180d88245d05a86e5fb6a3b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/384267
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
The new "unix" build tag matches any Unix or Unix-like system.
This is only recognized on go:build lines, not in file names.
For #20322Fixes#51572
Change-Id: I3a991f9e69353b25e259bc6462709cdcd83640fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/389934
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
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Otherwise, the behavior of 'go work use -r' (without arguments)
may be surprising.
Change-Id: I50cf1339591720ec5bd333146b89c9944ce420d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/389855
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This change removes the -workfile flag and allows the go.work file path
to be set using GOWORK (which was previously read-only). This removes
the potential discrepancy and confusion between the flag and environment
variable.
GOWORK will still return the actual path of the go.work file found if it
is set to '' or 'auto'. GOWORK will return 'off' if it is set to 'off'.
For #45713Fixes#51171
Change-Id: I72eed65d47c63c81433f2b54158d514daeaa1ab3
Reviewed-on: https://go-review.googlesource.com/c/go/+/385995
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>
For #45713
Change-Id: Ia55a96702b99cccaf5d96c2125ee513700658444
Reviewed-on: https://go-review.googlesource.com/c/go/+/381874
Trust: Ian Lance Taylor <iant@golang.org>
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Trust: Michael Matloob <matloob@golang.org>
Fixes#50501
(in a sense, by removing a flag that looks like it should do something
it does not)
Change-Id: I69ae4862706a6283cda4016fd43b361bb21557f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/378576
Trust: Bryan Mills <bcmills@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
The change clarifies in the release notes for go1.18 that the variable
is for compilation and references the microarchitecture description in
the Go Wiki,
https://golang.org/wiki/MinimumRequirements#amd64,
and references the same information in the output of go help
environment.
Fixes#50174
Change-Id: I6a7d5a06f48463a810c96cc9c76fe66113d5147c
Reviewed-on: https://go-review.googlesource.com/c/go/+/372194
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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That is replaced by `go work edit`.
Change-Id: I39996c7bea0182a18edf6a1f70b6616c74099a1b
Reviewed-on: https://go-review.googlesource.com/c/go/+/370139
Reviewed-by: Michael Matloob <matloob@golang.org>
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
This CL updates "go help doc" docs so they reflect the following
changes:
- CL 59413 modified "go doc", so the behavior of the two-args case is
consistent with the one-arg one.
- CL 141397 removed godoc's command-line interface in favor of "go doc".
Fixes#49830.
Change-Id: I0923634291d34ae663fe2944d69757462b814919
Reviewed-on: https://go-review.googlesource.com/c/go/+/367497
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
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The current error message that no go.mod files were found is not
helpful, especially when a go.mod file exists in the current directory.
Fixes#49594
Change-Id: I750475ce8654eeb3e0a2857d5a2de1a9c6ede415
Reviewed-on: https://go-review.googlesource.com/c/go/+/365319
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
This change updates the cmd module's requirement on x/mod and vendors in
the changes.
This pulls in the following changes into our vendored copy of x/mod:
golang.org/cl/351319: module: accept trailing slash in MatchPrefixPattern
golang.org/cl/353749: semver: remove unused err field
golang.org/cl/355630: x/mod: update requirement on x/crypto
golang.org/cl/359412: modfile: rename directory directive to use
Changes have been made in cmd/go renaming all uses of directory to use
and fixing references to functions in x/mod/modfile to account for the
changes in the last of thse CLs.
For #45713
Change-Id: I9121d08f6e6b11838bca50e6cbd756baeeae867b
Reviewed-on: https://go-review.googlesource.com/c/go/+/364114
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
For #45713, #48257
Change-Id: I7e9248f22fe7ab33b151e07cc296d64c194154e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/359534
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
This change doesn't modify any functionality.
It also doesn't update all of the comments and
variable names of the internal code, but everything
user facing should be correct.
Updates #49185
Change-Id: Ia8b2c94b89ba45897c4085ea0c17a3d8896f7ec7
Reviewed-on: https://go-review.googlesource.com/c/go/+/362794
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
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Reviewed-by: Roland Shoemaker <roland@golang.org>
Adds a new flag to 'go mod vendor' which overrides the default
'vendor' destination directory. This can be helpful for writing the
vendor tree to a temporary location for use by other tools.
The argument can be a relative or an absolute path.
This flag has no other influence on how the command behaves.
Fixes#47327
Change-Id: I4502931127616b181dc90a2066d2fb57bfe48f96
Reviewed-on: https://go-review.googlesource.com/c/go/+/338149
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
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This brings the workspace related commands into their own namespace.
Fixes#48256
Change-Id: I9d5e3d4c45798913d742c532c1571006e6f9cc57
Reviewed-on: https://go-review.googlesource.com/c/go/+/357611
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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The help text for the go test -shuffle flag is not indented like the
other flags. This patch brings it into alignment.
Fixes#49357
Change-Id: I3f18dc7cd84d5f23099262acf6e2fedccb11379c
Reviewed-on: https://go-review.googlesource.com/c/go/+/361395
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Michael Matloob <matloob@golang.org>
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