Commit Graph

837 Commits

Author SHA1 Message Date
Ian Cottrell 214274eeeb go/packages: changes to the API per CL 125305
Collapse the main entry points to the single Load function.
Make public the Mode enumeration in the Config.
Add a lowest level mode that does not do the import graph.
Remove PkgPath.
Remove the DisableCgo option.
Rename some fields of Package:
  Srcs -> GoFiles
  OtherSrcs -> OtherFiles
  Type -> Types
  Files -> Syntax
  Info -> TypesInfo
delete the All function

Change-Id: I54e5dc3ca5cb0b7e33fe6aa6f70cc66e18ea8cac
Reviewed-on: https://go-review.googlesource.com/125535
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-25 00:10:29 +00:00
Ian Cottrell ded554d068 go/packages: splitting the scratch fields out of Package
This makes Package a struct we can re-use in other places/algorithms.

Change-Id: I2e095a624bf44223319ba1ea3d60deb727b38f81
Reviewed-on: https://go-review.googlesource.com/124855
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-23 20:42:46 +00:00
Russ Cox 96ee42108a go/packages: revise documentation
I made a pass through the documentation trying to simplify
and make it more accessible to readers who are unfamiliar
with all the ins and outs of the implementation.

I also added TODOs about things I don't understand
and names that we should think about changing.

Change-Id: I633316bd407f3360eb8a683bc8d85fba93ca381e
Reviewed-on: https://go-review.googlesource.com/125305
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-23 18:30:23 +00:00
Michael Matloob 54f9f5980a go/packages: remove Package.IsTest field
We have not yet settled on the meaning of Package.IsTest, and more
deeply which packages are test and which are non test packages.

This change will remove Package.IsTest in the meantime to avoid
confusion. We may later add a boolean or some other way to distinguish
test and non-test packages.

Change-Id: If6b128f7914009fdd42b8bc3de3bff73c8f006cd
Reviewed-on: https://go-review.googlesource.com/124388
Reviewed-by: Russ Cox <rsc@golang.org>
2018-07-19 17:37:31 +00:00
Michael Matloob d74aaa1f57 go/packages: Options.{Dir,Env} pass-through
This change adds optional Dir string and Env []string options
that are passed through to the build system's metadata query.
As with exec.Cmd, the defaults are inherited from the parent
process.

Options.GOPATH is gone. If the client needs to override
GOPATH, they must use Env, but typically the inherited environment
is correct.

The tests not longer use os.Chdir.

We now guarantee that Package.Srcs are absolute file names.

Added test for Options.Dir and relative patterns.

This is a copy of golang.org/cl/123777, which had a merge conflict.

Change-Id: I301724581f3d8c712ea78fa5ab5cabd909940dca
Reviewed-on: https://go-review.googlesource.com/123777
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-17 15:06:01 +00:00
Brad Fitzpatrick fd2d2c45eb go/packages: fix/skip some tests making build.golang.org red
Updates golang/go#26387

Change-Id: I5d91f3747b4f17186813d830f24aa510f5cf0060
Reviewed-on: https://go-review.googlesource.com/123957
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-07-14 20:55:45 +00:00
Alan Donovan 18e9dfbf20 go/packages: add Option.Tests bool, which affects pattern expansion
In the go build system, test packages and executables do not have a
name distinct from the package under test; they are implied, so
"go test fmt" means build those packages but "go build fmt" does not.

This change adds a Tests boolean option to indicate that implied
tests are desired during pattern expansion.
It has no effect on build systems that have explicit names
for tests, such as Blaze/Bazel.

The gopackages diagnostic tool now has a -test flag.

Change-Id: I424f343958c4286539e518d5f30067da19a57f3b
Reviewed-on: https://go-review.googlesource.com/123775
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-13 17:38:36 +00:00
Alan Donovan 9d3ae49c73 go/packages: report a distinguished ErrGoTooOld error for older go commands
We should add support for older go commands using the multiple-calls
approach of earlier drafts of go/packages.

Also, tag tests for go1.11 to make 1.10 builder happy.

Change-Id: Ia04979528af25cbcd4b4fa5b21cb91d014d530c1
Reviewed-on: https://go-review.googlesource.com/123756
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-07-13 17:38:21 +00:00
Alan Donovan 2087f8c107 go/packages: remove POSIX filename assumption from test
Change-Id: If1aac9f109b05897b21a2f27a4050fbee2cc2d2e
Reviewed-on: https://go-review.googlesource.com/123357
Run-TryBot: Alan Donovan <adonovan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-11 20:34:38 +00:00
Alan Donovan 9622293277 go/packages: a new Go package loader for go, vgo and other build systems
This package defines a new API for applications that need information
about Go packages, such as their source files, tests, dependencies,
and (optionally) typed syntax trees. It is intended to replace both
go/build and golang.org/x/tools/go/loader with an API that is simpler
yet supports a range of build systems including 'go build', vgo,
Bazel, and Blaze.

This CL contains the API, the "go list"-based implementation, and some
basic tests. More tests, more features as described in doc.go, and
implementations for bazel and blaze will follow.

Read doc.go for orientation and a list of open questions.

Change-Id: Ib39f15b5e4e2f854553e7185fec5cf135641ffb0
Reviewed-on: https://go-review.googlesource.com/116359
Run-TryBot: Alan Donovan <adonovan@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2018-07-11 20:11:18 +00:00
LE Manh Cuong 8cb83b71b4 imports: fix lost line between package and import statement
Fixes golang/go#26290

Change-Id: Ide797a46bf1d0d6070940fb5b9db3e76502bc528
Reviewed-on: https://go-review.googlesource.com/122736
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-07-10 02:38:27 +00:00
Alan Donovan 16699b2d33 go/gcexportdata: add -package flag to diagnostic tool
...to show information about indirectly mentioned packages.

Change-Id: Ib74b56493861bf41d9720760e76ace186efae2ea
Reviewed-on: https://go-review.googlesource.com/121195
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-06-27 17:17:06 +00:00
Robert Griesemer 56e9b8e653 go/internal/gcimporter,gccgoimporter: use types.NewInterfaceType
https://go-review.googlesource.com/c/go/+/120875 changed the name
of types.NewInterface2 to NewInterfaceType. Adjust x/tools code to
match new API.

For golang/go#25301.

Change-Id: I21e13566f7c88591a16ce461cb4cce8901980b05
Reviewed-on: https://go-review.googlesource.com/120895
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-06-26 17:42:40 +00:00
Austin Clements 25b95b4822 go/ssa: fix some incorrect comments
Change-Id: I8aa4780e0fa4a182678f1d34b247ab203e906144
Reviewed-on: https://go-review.googlesource.com/119915
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-06-20 14:00:53 +00:00
David Symonds fcb3cb6c24 go/vcs: match go-import package prefixes by slash
This is related to golang/go#15947.

This ports https://golang.org/cl/23732 (June 2016)
from cmd/go to this repository.

Change-Id: I9960556bd19775b433d4eecc0ecca3f09ce1368b
Reviewed-on: https://go-review.googlesource.com/119935
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-06-20 03:09:55 +00:00
Robert Griesemer c995a08888 go/internal/gcimporter: move 1.11 specific tests out of non-1.11 builds (fix build)
TBR=adonovan

The tests TestImportedTypes and TestIssue25301 are dependent on many
1.11-specific bug fixes that went into go/types. Just move them out
of non-1.11 builds.

While doing so, also extended the set of test cases run by
TestImportedTypes (now matching the corresponding tests cases
in the std lib).

This also makes it again unnecessary to factor out the embeddedType
function into build-specific versions. Removed again.

For https://github.com/golang/lint/issues/402.

Change-Id: I45eb8c3d1dcca7b392f14a7660bc1599a44a0d41
Reviewed-on: https://go-review.googlesource.com/118567
Reviewed-by: Robert Griesemer <gri@golang.org>
2018-06-13 19:12:07 +00:00
Robert Griesemer e580e344d4 go/internal/gcimporter: don't use Interface.EmbeddedType for builds before go1.11
For https://github.com/golang/lint/issues/402.

Change-Id: I3f4eab123e52460980e76f5ffaca3a77a3af7374
Reviewed-on: https://go-review.googlesource.com/118565
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2018-06-13 18:37:28 +00:00
Robert Griesemer 6f857df7d4 go/internal/gccgoimporter: use types.NewInterface (not NewInterface2) for builds before Go 1.11
For https://github.com/golang/lint/issues/402.

Change-Id: I06d944aaa168fb595ff96eb27a7d6e7da344ebd6
Reviewed-on: https://go-review.googlesource.com/118564
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
2018-06-13 18:13:43 +00:00
Robert Griesemer 9d855108b0 go/internal/gcimporter: missed a NewInterface2 call in prior CL
For https://github.com/golang/lint/issues/402.

Change-Id: Ideaac18b4f0be1674bb07010840b3d10e6ebe9d6
Reviewed-on: https://go-review.googlesource.com/118639
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
2018-06-13 18:12:16 +00:00
Robert Griesemer 58c6d92c35 go/internal/gcimporter: use types.NewInterface (not NewInterface2) for builds before Go 1.11
For https://github.com/golang/lint/issues/402.

Change-Id: If8802c93679af57bcb50c43f386f37458813d910
Reviewed-on: https://go-review.googlesource.com/118563
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-06-13 17:48:59 +00:00
Robert Griesemer 9a70f1fcbf go/internal/gcimporter, gccgoimporter: updated to match latest version in std lib
This CL brings over the changes from:

https://go-review.googlesource.com/118496 (better error message when importer is out of date)
https://go-review.googlesource.com/114317 (permit embedding of non-defined interfaces via alias type names)
https://go-review.googlesource.com/85318  (use named receiver types for methods of named interfaces)
https://go-review.googlesource.com/42870  (report import path if package is not found)
https://go-review.googlesource.com/41710  (version tests for 1.8, v4 and v5)

Also updated go/gcexportdata to select between binary and new indexed export format.

For golang/go#25856.
For golang/go#25301.
For golang/go#20230.
For golang/go#13829.

Change-Id: Ibf77c50f86e767cef411bd1d3809e12397678958
Reviewed-on: https://go-review.googlesource.com/118555
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-06-13 15:25:57 +00:00
Ian Lance Taylor c65208ee29 go/...: make most tests pass with gccgo
There is one non-test change: have FakeContext change the compiler to
"gc", as callers expect to be accessing a gc-style GOROOT.

The go/pointer, go/ssa, and go/ssa/interp tests still fail with gccgo.

Change-Id: I850c9618401f6b9e63d7ca7196f91931b03f1524
Reviewed-on: https://go-review.googlesource.com/117395
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-06-08 16:58:49 +00:00
Andrew Gerrand 28aef64757 go/internal/gcimporter: return error from BExportData
This change adds an error return value to BExportData and replaces the
various calls to log.Fatal within that library with panics that
propagate the internal error up the call stack to BExportData which
recovers and returns the error.

Fixes golang/go#25431

Change-Id: Id628c63a04145bb469bd6fbc7fbab1b0fa291b2c
Reviewed-on: https://go-review.googlesource.com/113457
Reviewed-by: David Symonds <dsymonds@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-05-17 02:09:35 +00:00
Rebecca Stambler 6e0e2181b9 go/internal/gcimporter: support indexed export data
Support indexed export data in the x/tools gcimporter. Fixes tests with
tip.

This is just a copy of the bimport.go and iimport.go files in the
standard library gcimporter package, including some minor fixes to the
existing bimport.go. The iexport logic in x/tools still needs to be
updated.

Fixes golang/go#25052

Change-Id: I2858e5c0853735c904f32b7b27c1c288a9e62e88
Reviewed-on: https://go-review.googlesource.com/109595
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2018-04-26 19:07:32 +00:00
Tobias Klauser ccd319aab1 go/ssa/interp: add internal/syscall/unix.syscall_fcntl to fix tests
CL 100077 added the syscall_fcntl function in the internal/syscall/unix
package to refer to syscall.fcntl outside of the syscall package in a
unified way.

Add a replacement that simulates a successful fcntl call to fix the
interp tests.

Change-Id: I05847d222f18a19cb30f1395497e708a027a002e
Reviewed-on: https://go-review.googlesource.com/106415
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-04-11 19:48:31 +00:00
Matthew Dempsky 5dfd8930f2 go/internal/gcimporter: rename from go/gcimporter15
Follow through on promise to remove the old API.

Change-Id: If1f5addfeb1b82acc5a1730474e2f06102dbb615
Reviewed-on: https://go-review.googlesource.com/105977
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-04-10 13:03:03 +00:00
Matthew Dempsky 14d5b80f95 go/gcimporter15: support bimport format v6
Format change introduced by golang.org/cl/105038.

Change-Id: I76eefe9ce7f52743cb5cdcfe77e5ee0b5eb8743f
Reviewed-on: https://go-review.googlesource.com/105976
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-04-09 23:44:46 +00:00
Dmitri Shuralyov 9f6d4ad827 go/buildutil: use build.Import to find GOPATH containing x/tools
Previously, the test assumed that golang.org/x/tools was always in the
first GOPATH workspace. It may not be. Find it dynamically instead.

Fixes golang/go#19400.

Change-Id: I9c75d5ff1409aebd403d7ad4314b496fe1a04140
Reviewed-on: https://go-review.googlesource.com/94900
Run-TryBot: Dmitri Shuralyov <dmitri@shuralyov.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2018-03-05 17:28:52 +00:00
Dmitri Shuralyov e8fdd2090a go/vcs: fix command injection in VCS path
Apply same change as CL 94656 did for cmd/go/internal/get, but for
golang.org/x/tools/go/vcs, to help keep them in sync.

It indirectly includes changes from CL 94603, since CL 94656 was
rebased on top of CL 94603.

Updates golang/go#23867.
Helps golang/go#11490.

Change-Id: I33eca1aba19f47bbe3e83d4ef9f9cc9a9c9ae975
Reviewed-on: https://go-review.googlesource.com/94899
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-02-21 04:00:24 +00:00
Alan Donovan 2c62430689 go/callgraph/cha: fix bug computing correspondence of abstract/concrete methods
In a dynamic interface method call x.f() where x has type I, it is not sound
to assume that the receiver of the types.Signature for types.Func f has type I, as
Func objects for abstract methods may be shared by multiple interfaces.

Fixes golang/go#23925

Change-Id: I755e3010d1310480c46855e072946346626b3e59
Reviewed-on: https://go-review.googlesource.com/95697
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-02-21 01:23:17 +00:00
Dmitri Shuralyov a4ae709237 go/vcs: add package comment
According to https://golang.org/doc/effective_go.html#commentary,
"Every package should have a package comment."

Updates golang/go#11490.

GitHub-Last-Rev: 8dd80d0f1cbd94ab14dbfdbf0199ca199f33e1fd
GitHub-Pull-Request: golang/tools#22
Change-Id: Ia3af83cc68bcde12c37492ad240031aecf6934a3
Reviewed-on: https://go-review.googlesource.com/93081
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-02-14 20:11:16 +00:00
Daniel Martí 90b807ada4 all: fix a few issues found by unparam
In cmd/present, a mode was being passed to the function parse, but it
wasn't actually being used. Use it.

In go/ssa, checkFinalInstr received an idx integer but it doesn't
actually need it. Get rid of it.

Lastly, in imports, findImportStdlib always returned rename==false. Get
rid of that result parameter.

Change-Id: I719006b69ee80a3ef4b0ea24c1c206016a7e304b
Reviewed-on: https://go-review.googlesource.com/93596
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-02-13 22:52:51 +00:00
Alan Donovan a5d79d28aa go/...: fix/disable broken tests
gp/ssa: add {Start,Stop}TestLog methods to synthesized test main package.

go/ssa/interp: add (not thread-safe) intrinsics for atomic.Value,
which are now used by Getenv.

go/pointer: disable test of callbacks from runtime timers
as the analysis's intrinsics are out of date.  Also fix 3 typos.

Change-Id: I25f95ba18986727275a730b465e7fd23c08b2af2
Reviewed-on: https://go-review.googlesource.com/88055
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-01-17 18:00:52 +00:00
Robert Griesemer fbec762f83 go/internal/gccgoimporter: parse optional escape info in export data
This is a copy of https://go-review.googlesource.com/c/go/+/86977
and brings those changes into the x/tools repo.

It also includes a minor change to parser.go that was done via
https://go-review.googlesource.com/37839 but that wasn't brought
over.

For golang/go#23324.

Change-Id: I84b7cf134fec250ac340e404802158860cb3c630
Reviewed-on: https://go-review.googlesource.com/87295
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-01-11 04:04:09 +00:00
Brad Fitzpatrick ef037a11d2 go/ssa/interp: skip tests on darwin until crashes are fixed
Updates golang/go#23166

Change-Id: Ie9db70d6f2f8d90817ec3de35e6ca51ec476f949
Reviewed-on: https://go-review.googlesource.com/85995
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-01-03 17:43:40 +00:00
Michael Hudson-Doyle 894cde2672 go/ssa/interp: add intrinsic for math.hasVectorFaciliy to fix tests on s390x
Change-Id: I482924585d2d74a25bf88169900a8788b5333738
Reviewed-on: https://go-review.googlesource.com/85235
Reviewed-by: Michael Munday <mike.munday@ibm.com>
Run-TryBot: Michael Munday <mike.munday@ibm.com>
2018-01-02 20:34:48 +00:00
Kashav Madan f271d7a0f8 go/pointer: fix typo ("distiction" -> "distinction")
Change-Id: I88334b30b08e110b837c255220385c9c4cd4a823
Reviewed-on: https://go-review.googlesource.com/85576
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2017-12-28 08:16:41 +00:00
Robert Griesemer 04447353bc go/ssa: complete interface types for correct string form (fix build)
Fixes golang/go#22933.

Change-Id: I0cf0aab8b77114ee7eb1e181aee2c5b75087aa83
Reviewed-on: https://go-review.googlesource.com/80897
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-11-30 18:55:14 +00:00
Alan Donovan 2c687adedb go/ssa/interp: drop interpretation of "testing" package
The "testing" package depends on low-level details that change too often.

Change-Id: I59101e16588296cb40c851d4a34ddf199f4d176c
Reviewed-on: https://go-review.googlesource.com/80376
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-11-28 21:57:06 +00:00
Alan Donovan 0e42b0fe40 go/ssa/interp: add fake runtime.callerName to fix broken tests
We are inching towards the point at which I blow away this entire
package, or at least all tests that interpret the standard "testing"
package.

Change-Id: I06d99aac6d7baab14ee6c6a61afe0af34b814767
Reviewed-on: https://go-review.googlesource.com/80356
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-11-28 20:52:38 +00:00
Robert Griesemer 6d70fb2e85 go/ast/astutil: add Apply, for rewriting Go ASTs
This change implements an AST walker, Apply, with the capability
to perform various actions (including rewrites) during the AST
walk, in pre- and post-iteration order.

Ideally we would like to have this functionality in the std lib
(go/ast), but as this change contains significant new API, it
is better to first gain some experience with it in x/tools.

Credits: This is joint work of Josh Bleecher Snyder, Roger
Peppe, and myself (author of this CL). The code is based on
proposal golang/go#17108 which I had started, together with an
initial implementation. It was then reworked significantly by
Josh in golang.org/cl/55790, further refined by suggestions
from Roger (allocation reduction), and finally cleaned up a bit
by me (AST simplifications).

Fixes golang/go#17108.

Change-Id: I56d56b7f2bc5be2acfeb927f76aea7f264bb7b94
Reviewed-on: https://go-review.googlesource.com/77811
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-11-16 01:30:56 +00:00
Dmitri Shuralyov ebae2dcdba go/vcs: reject update of VCS inside VCS
Manually apply same change as CL 68110 did for cmd/go/internal/get,
but for golang.org/x/tools/go/vcs, to help keep them in sync.

Updates golang/go#22125.
Helps golang/go#11490.

Change-Id: I255f7a494d9572389fc8dc8ce96891b6fcc214a0
Reviewed-on: https://go-review.googlesource.com/68352
Reviewed-by: Russ Cox <rsc@golang.org>
2017-10-05 08:21:07 +00:00
haya14busa 84a35ef54d go/ast/astutil: new third-party imports shouldn't go in the std group
Before this change, astutil would only do a prefix match of a new import
with all the existing ones, to try to place it in the correct group. If
none was found, the new import would be placed at the beginning of the
first import group.

This works well for new std imports, but it doesn't work well for new
third-party packages that don't share any prefix with any of the
existing imports.

Example:

	import (
		"time"

		"github.com/golang/snappy"
	)

When adding "golang.org/x/sys/unix" with astutil.AddImport, the import
is inserted as follows:

	import (
		"golang.org/x/sys/unix"
		"time"

		"github.com/golang/snappy"
	)

And goimports reorganizes the imports to separate std and third-party
packages:

	import (
		"time"

		"golang.org/x/sys/unix"

		"github.com/golang/snappy"
	)

We usually don't want to introduce a new import group; in most cases,
the desired behavior is separating std from third-party packages.

With this CL, new imports that don't share prefix with any existing ones
will be placed with the first group of third-party imports, if any
exist. If no third-party import group exists, a new one will be added.
In the case of our example above, this will be the new outcome:

	import (
		"time"

		"github.com/golang/snappy"
		"golang.org/x/sys/unix"
	)

Fixes golang/go#19190.

Change-Id: Id4630015c029bd815234a6c8726cb97f4af16f1c
Reviewed-on: https://go-review.googlesource.com/37552
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2017-08-15 00:39:00 +00:00
Kirill Smelkov c2d03f470b go/loader: Fix thinko in FindPackage hook signature
(*build.Context).Import has signature of

	(ctx, importPath, fromDir, mode)

not

	(ctx, fromDir, importPath, mode)

and the loader actually uses the first version.

The thinko was introduced in d6e83e53 (go/loader: changes for vendor
support; CL 18053) and was possible because importPath and fromDir both
have the same type string.

Fix it.

Change-Id: I52deaec6d141846b8a495835b121c1bdc2864215
Reviewed-on: https://go-review.googlesource.com/47343
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-07-05 16:38:48 +00:00
Alan Donovan 63c6481f3b go/loader: fix a data race
The loader was calling (*types.Checker).Files on the "unsafe" package,
a global variable.  Even with zero files, this operation is not a no-op
because it sets the package's "complete" flag, leading to a data race.
(Because Unsafe.complete is already set at construction, the
race is benign, but is reported by -race nonetheless.)

Fixes golang/go#20718

Change-Id: I5a4f95be5ab4c60ea3b6c2a7fb6f1b67acbf42bc
Reviewed-on: https://go-review.googlesource.com/46071
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2017-06-19 17:45:44 +00:00
Alan Donovan 34f7837286 go/ssa: remove statement with no effect
Change-Id: I1c7958ab16f19fbdc71d2305da3d4afb6e150f73
Reviewed-on: https://go-review.googlesource.com/45934
Reviewed-by: Dmitri Shuralyov <shurcool@gmail.com>
2017-06-15 21:28:45 +00:00
Alan Donovan 6d30ceaab7 go/ssa: fix regression in φ-elimination
https://go-review.googlesource.com/37157 introduced a bug that caused
some live φ-nodes to be removed from the CFG.  The cause was that
reachability traversal considered edges only among "new" φ-nodes
(those introduced during SSA renaming) but not existing φ-nodes from
&& and || expressions.  The fix is to mark existing phis, and thus
other phis reachable from them, as live.  We also clear the Phi.block
field when eliminating a φ-node.

Also, during reachability, we treat DebugRef instructions as roots
like any other non-Phi instruction.  This eliminates a related known
bug whereby the operand of a DebugRef may be a dead φ.

This change also adds a sanity check that all operands of an SSA value
that are themselves instructions must belong to a block.  The sanity
check would fail 7 times on the standard library without the fix.

Fixes golang/go#19622

Change-Id: If3a897a6a593a17bc3f0f8228d1edf483be7a3d0
Reviewed-on: https://go-review.googlesource.com/45832
Run-TryBot: Dominik Honnef <dominik@honnef.co>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dominik Honnef <dominik@honnef.co>
2017-06-15 18:36:17 +00:00
Alan Donovan 365911de24 go/ssa: opt: avoid an allocation
In the dom tree traversal, the final child of each node now
inherits the parent's renaming map, reducing garbage.

This reduces allocations by 1.4% and bytes allocated by 2.0% when
building SSA for the entire standard library.

Change-Id: Id19b6d6766b3e0bf32d1db1238eff8a42d11b242
Reviewed-on: https://go-review.googlesource.com/45833
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-06-15 16:36:43 +00:00
Robert Griesemer b9ad13c5e8 go/gcexportdata: fix test again (fix older builds)
This time, chose a package that's not changed across several builds.
Follow-up on https://go-review.googlesource.com/45151.

Change-Id: I0b487a45f8b12179b3aa495d852c0b7caa44c921
Reviewed-on: https://go-review.googlesource.com/45154
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-06-08 21:12:18 +00:00
Robert Griesemer add5a52034 go/gcexportdata: fix test output (fix build)
Change-Id: Ib9a92c7b7ac09e739177b8c4c16f893dfb5e4420
Reviewed-on: https://go-review.googlesource.com/45151
Reviewed-by: Alan Donovan <adonovan@google.com>
2017-06-08 18:19:49 +00:00