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Commit Graph

46788 Commits

Author SHA1 Message Date
Rebecca Stambler
759309029f doc: update editors.html for Go 1.16
Rerank editor plugins based on popularity (Go 2019 survey), and remove
Atom, as it is no longer popular.

Change-Id: I06d39b67eec24a920439b9ea1198b6e2a939874e
Reviewed-on: https://go-review.googlesource.com/c/go/+/283073
Trust: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-01-11 19:45:02 +00:00
Matthew Dempsky
44d1a8523a [dev.typeparams] cmd/compile/internal/types2: fixes for all.bash
This CL implements a number of minor fixes that were discovered in
getting -G=3 working for running all.bash.

1. Field tags were handled incorrectly. If a struct type had some
fields with tags, but later fields without tags, the trailing tag-less
fields would all copy the tag of the last tagged field. Fixed by
simply reinitializing `tag` to "" for each field visited.

2. Change the ending of switch case clause scopes from the end of the
last statement to the next "case" token or the switch-ending "}"
token. I don't think this is strictly necessary, but it matches my
intuition about where case-clause scopes end and cmd/compile's current
scoping logic (admittedly influenced by the former).

3. Change select statements to correctly use the scope of each
individual communication clause, instead of the scope of the entire
select statement. This issue appears to be due to the original
go/types code being written to rebind "s" from the *SelectStmt to the
Stmt in the range loop, and then being further asserted to "clause" of
type *CommClause. In most places within the loop body, "clause" was
used, but the rebound "s" identifier was used for the scope
boundaries.

However, in the syntax AST, SelectStmt directly contains a
[]*CommClause (rather than a *BlockStmt, with []Stmt), so no assertion
is necessary and instead of rebinding "s", the range loop was updated
to directly declare "clause".

4. The end position for increment/decrement statements (x++/x--) was
incorrectly calculated. Within the syntax AST, these are represented
as "x += ImplicitOne", and for AssignStmts types2 calculated the end
position as the end position of the RHS operand. But ImplicitOne
doesn't have any position information.

To workaround this, this CL detects ImplicitOne and then computes the
end position of the LHS operand instead, and then adds 2. In practice
this should be correct, though it could be wrong for ill-formatted
statements like "x ++".

Change-Id: I13d4830af39cb3f3b9f0d996672869d3db047ed2
Reviewed-on: https://go-review.googlesource.com/c/go/+/282914
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-01-11 19:28:34 +00:00
Matthew Dempsky
8123bc90b8 [dev.typeparams] cmd/go: relax test expectation
go/types reports `"pkg/path" imported and not used` rather than
`imported and not used: "pkg/path"`, like cmd/compile. Relax the test
expectation to accomodate either.

Change-Id: I318992946160a9090f8991f4c97784ba1d1b78b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/282913
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-01-11 19:24:35 +00:00
Matthew Dempsky
8c5aa42c79 [dev.typeparams] cmd/compile: calculate variable sizes in walk
Walk already explicitly calculates the size of all expression types,
to make sure they're known before SSA generation (which is concurrent,
and thus not safe to modify shared state like types). Might as well
compute all local variable sizes too, to be consistent.

Reduces the burden of the frontend to make sure it's calculated the
size of types that only the backend cares about.

Passes toolstash -cmp.

Change-Id: I68bcca67b4640bfc875467e4ed4d47104b1932f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/282912
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-01-11 19:24:28 +00:00
Rob Findley
1ce0854157 [dev.typeparams] import stmt changes from dev.go2go
Import logic for typechecking statements involving generics from the
dev.go2go branch.  Notably, range type checking was simplified in
dev.go2go, resulting in the removal of the _InvalidChanRange error code.

Change-Id: I84c2665226c2b9b74e85f7fb6df257b0a292e5d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/282120
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Trust: Robert Findley <rfindley@google.com>
2021-01-11 18:23:13 +00:00
Rob Findley
eb53a6c7cf [dev.typeparams] import operand.go changes from dev.go2go
This involved some non-trivial changes from dev.go2go, due to the
refactoring of assignability in master.

Change-Id: I73d99053fc8b184ae79b7b8973bd15e69e50fe6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/282119
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Trust: Robert Findley <rfindley@google.com>
2021-01-11 18:23:01 +00:00
Rob Findley
81cd99858d [dev.typeparams] go/types: import expr changes from dev.go2go
This change imports assignments.go, builtins.go, call.go,
conversions.go, and expr.go from the dev.go2go branch.

Changes from dev.go2go:
 - Update error positions and codes.
 - Fix some failing tests due to error message changes.
 - Fix a bug in exprInternal where normal IndexExpr checking wasn't
   proceeding in the case of a non-generic indexed func.
 - Fix the type of the second operand in commaerr expressions to be
   universeError. We should add tests in a later CL.

This code was mostly reviewed, but call.go and expr.go were marked
incomplete.  Additionally, these two files had notably diverged from
types2, requiring further understanding.

The dev.go2go branch significantly simplified the type checking of
arguments, resulting in the removal of the _InvalidDotDotDot operand
error code.

Change-Id: Iba2cef95e17bfaa6da6d4eb94c2e2ce1c691ac44
Reviewed-on: https://go-review.googlesource.com/c/go/+/282193
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Trust: Robert Findley <rfindley@google.com>
2021-01-11 18:22:49 +00:00
Cherry Zhang
c3b4c7093a cmd/internal/objfile: don't require runtime.symtab symbol for XCOFF
For some reason (that I didn't look into), externally linked
AIX binaries don't have runtime.symtab symbol. Since recent Go
releases (Go 1.3 maybe?), that symbol is empty and not necessary
anyway. Don't require it.

Fixes #40972.

Change-Id: I73a1f0142195ea6debdba8a4f6e12cadc3980dc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/279995
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-01-11 18:19:08 +00:00
Matthew Dempsky
7fd84c6e46 [dev.regabi] cmd/compile: remove OCLOSUREREAD
After the previous CLs, all closure reads are handled during SSA
construction.

Change-Id: Iad67b01fa2d3798f50ea647be7ccf8195f189c27
Reviewed-on: https://go-review.googlesource.com/c/go/+/281512
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-01-10 08:02:23 +00:00
Matthew Dempsky
c9c26d7ffb [dev.regabi] cmd/compile: use ClosureVars for method value wrappers
Similar to with regular closures, we can change method value wrappers
to use ClosureVars and allow SSA construction to take care of wiring
it up appropriately.

Change-Id: I05c0b1bcec4e24305324755df35b7bc5b8a6ce7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/281353
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-10 08:02:16 +00:00
Matthew Dempsky
950cf4d46c [dev.regabi] cmd/compile: bind closure vars during SSA constructions
For function literals that aren't inlined or directly called, we need
to pass their arguments via a closure struct. This also means we need
to rewrite uses of closure variables to access from this closure
struct.

Currently we do this rewrite in a pass before walking begins. This CL
moves the code to SSA construction instead, alongside binding other
input parameters.

Change-Id: I13538ef3394e2d6f75d5b7b2d0adbb00db812dc2
Reviewed-on: https://go-review.googlesource.com/c/go/+/281352
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
2021-01-10 08:02:06 +00:00
Matthew Dempsky
8b2efa990b [dev.regabi] cmd/compile: deref PAUTOHEAPs during SSA construction
Currently, during walk we rewrite PAUTOHEAP uses into derefs of their
corresponding Heapaddr, but we can easily do this instead during SSA
construction. This does involve updating two test cases:

* nilptr3.go

This file had a test that we emit a "removed nil check" diagnostic for
the implicit dereference from accessing a PAUTOHEAP variable. This CL
removes this diagnostic, since it's not really useful to end users:
from the user's point of view, there's no pointer anyway, so they
needn't care about whether we check for nil or not. That's a purely
internal detail. And with the PAUTOHEAP dereference handled during SSA
construction, we can more robustly ensure this happens, rather than
relying on setting a flag in walk and hoping that SSA sees it.

* issue20780.go

Previously, when PAUTOHEAPs were dereferenced during walk, it had a
consequence that when they're passed as a function call argument, they
would first get copied to the stack before being copied to their
actual destination. Moving the dereferencing to SSA had a side-effect
of eliminating this unnecessary temporary, and copying directly to the
destination parameter.

The test is updated to instead call "g(h(), h())" where h() returns a
large value, as the first result will always need to be spilled
somewhere will calling the second function. Maybe eventually we're
smart enough to realize it can be spilled to the heap, but we don't do
that today.

Because I'm concerned that the direct copy-to-parameter optimization
could interfere with race-detector instrumentation (e.g., maybe the
copies were previously necessary to ensure they're not clobbered by
inserted raceread calls?), I've also added issue20780b.go to exercise
this in a few different ways.

Change-Id: I720598cb32b17518bc10a03e555620c0f25fd28d
Reviewed-on: https://go-review.googlesource.com/c/go/+/281293
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-01-10 08:01:49 +00:00
Jay Conrod
59bfc18e34 cmd/go: add hint to read 'go help vcs' to GOVCS errors
Fixes #43596

Change-Id: Iff925d077b5de64161e88c9471402bc7e8885fcd
Reviewed-on: https://go-review.googlesource.com/c/go/+/282713
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-08 22:55:41 +00:00
Robert Griesemer
6ee9b118a2 [dev.regabi] cmd/compile: remove fmt_test code; it has outlived its usefulness
With the recent compiler rewrites and cleanups to gc/fmt.go, the
"safety net" provided by fmt_test has become less important and
the test itself has become a burden (often breaks because of small
format changes elsewhere).

Eventually, the syntax and types2 packages will provide most error
and diagnostic compiler output at which point fmt.go can be further
simplified as well.

Change-Id: Ie93eefd3e1166f3548fed0199b732dbd6c81948a
Reviewed-on: https://go-review.googlesource.com/c/go/+/282560
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-01-08 22:40:47 +00:00
Robert Griesemer
822aeacd9e [dev.typeparams] cmd/compile/internal/syntax: remove ShortString, use String instead
Follow-up on feedback by mdempsky@ in https://golang.org/cl/282552 .

Change-Id: I1e5bb2d67cc8ae29fed100b87d18a33b3e2069eb
Reviewed-on: https://go-review.googlesource.com/c/go/+/282672
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 22:00:23 +00:00
Jay Conrod
cd6f3a54e4 cmd/go: revise 'go help' documentation for modules
Module-related help pages now contain a brief summary and point to the
reference documentation at golang.org/ref/mod for details.

Help pages for commands like 'go get' still describe the basic usage
and summarize flags but don't provide as much background detail.

Fixes #41427
Fixes #43419

Change-Id: Icacd38e0f33c352c447cc5a496c99674493abde2
Reviewed-on: https://go-review.googlesource.com/c/go/+/282615
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-08 20:21:06 +00:00
Jay Conrod
6192b98751 cmd/go: make hints in error messages more consistent
* All commands the user can run to fix the problem now appear alone on
  a separate line after a tab.
* Removed -d from 'go get' commands.
* Replaced 'go mod tidy' with 'go mod download $modpath' when a
  package might be provided by a module missing a sum.
* Errors about 'path@version' syntax are more explicit.

Fixes #29415
Fixes #42087
Fixes #43430
Fixes #43523

Change-Id: I4427c2c4506a727a2c727d652fd2d506bb134d3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/282121
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-08 20:19:51 +00:00
Jay Conrod
25886cf4bd cmd/go: preserve sums for indirect deps fetched by 'go mod download'
Previously, commands that wrote go.sum (except 'go mod tidy') would
retain sums for zip files of directly required modules. Sums of
indirect dependencies wouldn't be retained unless they were used to
load packages.

With this change, sums for indirect dependencies will be retained if
they're available. This allows users to add missing sums with
'go mod download example.com/mod', which previously only worked for
directly required modules.

Note that 'go mod download' without arguments now adds sums for every
module in the build list. That matches 1.15 behavior.

For #41103

Change-Id: I4cce2bf1c73578dae836bdb5adb32da071554f1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/282692
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-01-08 19:48:42 +00:00
Michael Anthony Knyszek
6250833911 runtime/metrics: mark histogram metrics as cumulative
All the current histogram metrics accumulate counts from program start
to infinity, and can be reasonably used to compute rates (also to
generate windowed distributions).

Change-Id: I5196c59867de34fba41bb8552606fa315460cef9
Reviewed-on: https://go-review.googlesource.com/c/go/+/282633
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-01-08 18:15:53 +00:00
Michael Anthony Knyszek
8f6a9acbb3 runtime/metrics: remove unused StopTheWorld Description field
This change removes the as-of-yet unused StopTheWorld field in the
Description struct. Adding a new field to a struct is much easier than
removing it, so let's save it for when we actually need it.

Change-Id: I8074b8569187c1a148500575fa8a661534e875d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/282632
Run-TryBot: Michael Knyszek <mknyszek@google.com>
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Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-01-08 18:15:43 +00:00
Robert Griesemer
d017a1b649 [dev.typeparams] cmd/compile/internal/syntax: add Walk node vistor from types2
This moves the Walk visitor from the types2 to the syntax
package. There are no changes but for package name adjustments.
Preparation for a more full-fledged node visitor.

Change-Id: I95217e27ff943ac58a7638fb8d1cd347d0d554b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/282556
Trust: Robert Griesemer <gri@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 17:32:20 +00:00
Robert Griesemer
7903214fcc [dev.typeparams] cmd/compile/internal/syntax: add ShortString tests
This CL moves the exprstring_test.go from the types2
package into the syntax package (which contains the
actual ShortString function). The code is mostly un-
changed but for the updated TestShortString function.

Change-Id: Ib39e3181e643fc0ac96ddf144a3114893a50c2fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/282554
Trust: Robert Griesemer <gri@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 17:32:18 +00:00
Robert Griesemer
0aede1205b [dev.typeparams] cmd/compile/internal/types2: use syntax printer to print expressions
The syntax package has a full-fledged node printer. Use that printer
to create the expression strings needed in error messages, and remove
the local (essentially) duplicate code for creating expression strings.

Change-Id: I03673e5e79b3c1470f8073ebbe840a90fd9053ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/282553
Trust: Robert Griesemer <gri@golang.org>
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2021-01-08 17:32:16 +00:00
Robert Griesemer
934f9dc0ef [dev.typeparams] cmd/compile/internal/syntax: clean up node printing API
Preparation for using the syntax printer as expression printer in types2.

- Introduced Form to control printing format
- Cleaned up/added String and ShortString convenience functions
- Implemented ShortForm format which prints … for non-empty
  function and composite literal bodies
- Added test to check write error handling

Change-Id: Ie86e46d766fb60fcf07ef643c7788b2ef440ffa8
Reviewed-on: https://go-review.googlesource.com/c/go/+/282552
Trust: Robert Griesemer <gri@golang.org>
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2021-01-08 17:32:14 +00:00
Russ Cox
6598c65646 cmd/compile: fix exponential-time init-cycle reporting
I have a real 7,000-line Go program (not so big)
that took over two minutes to report a trivial init cycle.
I thought the compiler was in an infinite loop but
it was actually just very slow.

CL 170062 rewrote init cycle reporting but replaced
a linear-time algorithm with an exponential one:
it explores all paths through the call graph of functions
involved in the cycle.

The net effect was that  Go 1.12 took 0.25 seconds to load,
typecheck, and then diagnose the cycle in my program,
while Go 1.13 takes 600X longer.

This CL makes the new reporting code run in linear time,
restoring the speed of Go 1.12 but preserving the semantic
fixes from CL 170062.

Change-Id: I7d6dc95676d577d9b96f5953b516a64db93249bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/282314
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 17:14:20 +00:00
Russ Cox
fefad1dc85 test: fix timeout code for invoking compiler
When running go tool compile,
go tool is running compile as a subprocess.
Killing go tool with Process.Kill leaves the subprocess behind.
Send an interrupt signal first, which it can forward on
to the compile subprocess.

Also report the timeout in errorcheck -t.

Change-Id: I7ae0029bbe543ed7e60e0fea790dd0739d10bcaa
Reviewed-on: https://go-review.googlesource.com/c/go/+/282313
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 17:14:00 +00:00
Russ Cox
6728118e0a cmd/go: pass signals forward during "go tool"
This way, if a SIGINT is sent to the go command,
it is forwarded on to the underlying tool.

Otherwise trying to use os.Process.Signal to kill
"go tool compile" only kills the "go tool" not the "compile".

Change-Id: Iac7cd4f06096469f5e76164df813a379c0da3822
Reviewed-on: https://go-review.googlesource.com/c/go/+/282312
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-01-08 17:13:48 +00:00
Russ Cox
e65c543f3c go/build/constraint: add parser for build tag constraint expressions
This package implements a parser for the new //go:build constraint lines.
The parser also handles // +build lines, to be able to process legacy files.

This will not be used in the standard library until Go 1.17,
but it seems worth publishing in Go 1.16 so that code that
needs to process both kinds of lines once Go 1.17 comes out
will be able to build using Go 1.16 as well.

For #41184. Design in https://golang.org/design/draft-gobuild.

Change-Id: I756c0de4081c5039e8b7397200e5274f223ab111
Reviewed-on: https://go-review.googlesource.com/c/go/+/240604
Run-TryBot: Russ Cox <rsc@golang.org>
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Trust: Russ Cox <rsc@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2021-01-08 17:08:44 +00:00
Austin Clements
0c5afc4fb7 testing/fstest,os: clarify racy behavior of TestFS
The testing.TestFS function assumes that the file system it's testing
doesn't change under it. Clarify this in the documentation and fix the
use of os.TestDirFS that's currently susceptible to this race.

Fixes #42637.

Change-Id: Ia7792380726177f8953d150ee87381b66cb01cb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/282452
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2021-01-08 16:34:00 +00:00
Michael Anthony Knyszek
32afcc9436 runtime/metrics: change unit on *-by-size metrics to match bucket unit
This change modifies the *-by-size metrics' units to be based off the
bucket's unit (bytes) as opposed to the unit of the counts (objects).
This convention is more in-line with distributions in other metrics
systems.

Change-Id: Id3b68a09f52f0e1ff9f4346f613ae1cbd9f52f73
Reviewed-on: https://go-review.googlesource.com/c/go/+/282352
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2021-01-08 16:28:15 +00:00
Ian Lance Taylor
c6513bca5a io/fs: minor corrections to Glob doc
The documentation for Glob was copied from filepath.Glob, and needs a bit
of tweaking: paths are not rooted at slash; the separator is always '/'.

Fixes #43537

Change-Id: Id64daa137e2762b66a82a5b9e60bbe603f4e2f5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/282173
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2021-01-08 15:41:36 +00:00
Baokun Lee
b241938e04 [dev.regabi] cmd/compile: fix some methods error text
Change-Id: Ie9b034efba30d66a869c5e991b60c76198fd330f
Reviewed-on: https://go-review.googlesource.com/c/go/+/279444
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2021-01-08 11:05:29 +00:00
Keith Randall
304f769ffc cmd/compile: don't short-circuit copies whose source is volatile
Current optimization: When we copy a->b and then b->c, we might as well
copy a->c instead of b->c (then b might be dead and go away).

*Except* if a is a volatile location (might be clobbered by a call).
In that case, we really do want to copy a immediately, because there
might be a call before we can do the a->c copy.

User calls can't happen in between, because the rule matches up the
memory states. But calls inserted for memory barriers, particularly
runtime.typedmemmove, can.

(I guess we could introduce a register-calling-convention version
of runtime.typedmemmove, but that seems a bigger change than this one.)

Fixes #43570

Change-Id: Ifa518bb1a6f3a8dd46c352d4fd54ea9713b3eb1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/282492
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2021-01-08 05:00:06 +00:00
Michael Anthony Knyszek
ae97717133 runtime,runtime/metrics: use explicit histogram boundaries
This change modifies the semantics of
runtime/metrics.Float64Histogram.Buckets to remove implicit buckets to
that extend to positive and negative infinity and instead defines all
bucket boundaries as explicitly listed.

Bucket boundaries remain the same as before except
/gc/heap/allocs-by-size:objects and /gc/heap/frees-by-size:objects no
longer have a bucket that extends to negative infinity.

This change simplifies the Float64Histogram API, making it both easier
to understand and easier to use.

Also, add a test for allocs-by-size and frees-by-size that checks them
against MemStats.

Fixes #43443.

Change-Id: I5620f15bd084562dadf288f733c4a8cace21910c
Reviewed-on: https://go-review.googlesource.com/c/go/+/281238
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2021-01-08 03:43:44 +00:00
Meng Zhuo
a9ccd2d795 go/build: skip string literal while findEmbed
The findEmbed function looking for comment by readbyte,
however it might have constant or variables that contains
comment.
Maybe we should use ast parser in the future.

Fixes #43373

Change-Id: I92544384fc4c11363d8b2f6b9898c8dea1602767
Reviewed-on: https://go-review.googlesource.com/c/go/+/280332
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2021-01-08 02:18:40 +00:00
yangwenmai
d92f8add32 archive/tar: fix typo in comment
Change-Id: Ifcc565b34b3c3bb7ee62bb0525648a5d2895bf0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/282013
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
2021-01-08 02:03:24 +00:00
Ian Lance Taylor
cab1202183 cmd/link: accept extra blocks in TestFallocate
For #41127

Change-Id: I794a082299c6dce4202223197ece1864bed36810
Reviewed-on: https://go-review.googlesource.com/c/go/+/282555
Trust: Ian Lance Taylor <iant@golang.org>
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2021-01-08 01:58:34 +00:00
Meng Zhuo
ee4d32249b io/fs: minor corrections to Glob release date
io/fs is introduced in 2020, not 2009 nor 2010

Change-Id: I7d63aae17b1f8c3af1ded2f639e3fb76ff2aea81
Reviewed-on: https://go-review.googlesource.com/c/go/+/282232
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2021-01-08 01:48:01 +00:00
Ian Lance Taylor
54bd1ccce2 cmd: update to latest golang.org/x/tools
In particular bring in CL 201973, which reverts support for multiple
keys in a struct tag.

For #40281
For #43083
For #43226

Change-Id: I66e76639cbbca55bdbff6956acdb0a97650fdd31
Reviewed-on: https://go-review.googlesource.com/c/go/+/282412
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2021-01-08 01:33:44 +00:00
Ian Lance Taylor
9ec21a8f34 Revert "reflect: support multiple keys in struct tags"
Proposal #40281 was initially accepted, but has now been declined.
This CL removes most of the work done to implement it.

Specifically this reverts CLs 248341, 274448, 274474, and 278392.

For #40281
For #43226

Change-Id: I5a9ebb4d9cb5fb0962434b64c59beb8343030be5
Reviewed-on: https://go-review.googlesource.com/c/go/+/281515
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2021-01-07 23:43:25 +00:00
Ian Lance Taylor
091414b5b7 io/fs: correct WalkDirFunc documentation
The documentation was copied from filepath.WalkFunc, and the copy was
not fully adjusted to the new circumstances.

Fixes #43536

Change-Id: I09687c7656e6938ebd9fc1e1643d34be88cf141d
Reviewed-on: https://go-review.googlesource.com/c/go/+/282172
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2021-01-07 23:38:51 +00:00
Michael Matloob
9b55088d6b doc/go1.16: add release note for disallowing non-ASCII import paths
golang.org/cl/251878 disallowed non-ASCII characters in import paths,
in module mode. They were already disallowed in module paths, so this
change just extended the restriction to the package subdirectory of
the module. Update the release notes to alert users of this change.

Fixes #43052

Change-Id: I1caf9ef978dd3ac599a3f82c5c376ad62e6fc436
Reviewed-on: https://go-review.googlesource.com/c/go/+/282194
Trust: Michael Matloob <matloob@golang.org>
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2021-01-07 22:28:57 +00:00
Matthew Dempsky
5b9152de57 [dev.typeparams] all: merge dev.regabi (cb05a0a) into dev.typeparams
Merge List:

+ 2021-01-05 cb05a0aa6a [dev.regabi] cmd/compile: remove toolstash scaffolding
+ 2021-01-05 9821838832 [dev.regabi] cmd/compile: remove CaptureVars
+ 2021-01-05 fd43831f44 [dev.regabi] cmd/compile: reimplement capture analysis
+ 2021-01-05 fb69c67cad [dev.regabi] test: enable finalizer tests on !amd64
+ 2021-01-05 81f4f0e912 [dev.regabi] cmd/compile: remove race-y check in Name.Canonical
+ 2021-01-05 4a9d9adea4 [dev.regabi] cmd/compile: remove initname function

Change-Id: I519f349ff62b6c9bc5db2a0d34feef4b5d42cbae
2021-01-07 11:37:49 -08:00
Cuong Manh Le
fa90aaca7d cmd/compile: fix late expand_calls leaf type for OpStructSelect/OpArraySelect
For the example in #43551, before late call expansion, the OpArg type is
decomposed to int64. But the late call expansion is currently decompose
it to "x.Key" instead.

This CL make expand_calls decompose further for struct { 1-field type }
and array [1]elem.

This matches the previous rules for early decompose args:

(StructSelect (StructMake1 x)) => x
(ArraySelect (ArrayMake1 x)) => x

Fixes #43551

Change-Id: I2f1ebe18cb81cb967f494331c3d237535d2859e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/282332
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2021-01-07 19:31:03 +00:00
Michael Matloob
7cee66d4cb cmd/go: add documentation for Embed fields in go list output
This change the struct fields for EmbedPatterns and EmbedFiles
to the Package struct listed in the go list documentation that
specifies the fields available to the go list template.

Fixes #43081

Change-Id: I89c325a9d6292a6ce484ee588b172d2f84e2333a
Reviewed-on: https://go-review.googlesource.com/c/go/+/282195
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2021-01-07 18:56:09 +00:00
Ian Lance Taylor
e60cffa4ca html/template: attach functions to namespace
The text/template functions are stored in a data structure shared by
all related templates, so do the same with the original, unwrapped,
functions on the html/template side.

For #39807
Fixes #43295

Change-Id: I9f64a0a601f1151c863a2833b5be2baf649b6cef
Reviewed-on: https://go-review.googlesource.com/c/go/+/279492
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2021-01-07 17:51:29 +00:00
Ikko Ashimine
6da2d3b7d7 cmd/link: fix typo in asm.go
targetting -> targeting

Change-Id: Ie1752b1293426fe908799731acb352408db98d85
GitHub-Last-Rev: 4cf2a211b9
GitHub-Pull-Request: golang/go#43564
Reviewed-on: https://go-review.googlesource.com/c/go/+/282272
Trust: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-01-07 17:49:47 +00:00
Rob Findley
7e689f86e3 [dev.typeparams] go/types: move use and useLHS to match dev.go2go
This is a pure code move to simplify the diff.

Change-Id: I56ce4d17ed9f003d79f748e267c46a17feefe301
Reviewed-on: https://go-review.googlesource.com/c/go/+/282192
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2021-01-07 17:41:35 +00:00
Meng Zhuo
df81a15819 runtime: check mips64 VDSO clock_gettime return code
We introduced VDSO feature for mips64x in Go1.14, however Linux kernel
didn't ship VDSO safe fallback until 4.13.

This CL checks vdso return code it may fix this issue.

name         old time/op  new time/op  delta
Now           174ns ± 0%   176ns ± 0%  +1.20%  (p=0.000 n=8+9)
NowUnixNano   175ns ± 0%   177ns ± 0%  +1.13%  (p=0.000 n=9+7)
FormatNow    1.01µs ± 1%  1.02µs ± 3%    ~     (p=0.181 n=10+10)

Fixes #39046

Change-Id: Ibcefe4c8334f634c7ef18fa70f3c7dbe8306f224
Reviewed-on: https://go-review.googlesource.com/c/go/+/270717
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2021-01-07 01:55:27 +00:00
Filippo Valsorda
4787e906cf crypto/x509: rollback new CertificateRequest fields
In general, we don't want to encourage reading them from CSRs, and
applications that really want to can parse the Extensions field.

Note that this also fixes a bug where the error of
parseKeyUsageExtension was not handled in parseCertificateRequest.

Fixes #43477
Updates #37172

Change-Id: Ia5707b0e23cecc0aed57e419a1ca25e26eea6bbe
Reviewed-on: https://go-review.googlesource.com/c/go/+/281235
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2021-01-06 21:24:47 +00:00