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[dev.typeparams] all: merge master (785a8f6) into dev.typeparams

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- test/run.go

  CL 328050 added fixedbugs/issue46749.go to -G=3 excluded files list

Merge List:

+ 2021-06-16 785a8f677f cmd/compile: better error message for invalid untyped operation
+ 2021-06-16 a752bc0746 syscall: fix TestGroupCleanupUserNamespace test failure on Fedora
+ 2021-06-15 d77f4c0c5c net/http: improve some server docs
+ 2021-06-15 219fe9d547 cmd/go: ignore UTF8 BOM when reading source code
+ 2021-06-15 723f199edd cmd/link: set correct flags in .dynamic for PIE buildmode
+ 2021-06-15 4d2d89ff42 cmd/go, go/build: update docs to use //go:build syntax
+ 2021-06-15 033d885315 doc/go1.17: document go run pkg@version
+ 2021-06-15 ea8612ef42 syscall: disable c-shared test when no cgo, for windows/arm
+ 2021-06-15 abc56fd1a0 internal/bytealg: remove duplicate go:build line
+ 2021-06-15 4061d3463b syscall: rewrite handle inheritance test to use C rather than Powershell
+ 2021-06-15 cf4e3e3d3b reflect: explain why convertible or comparable types may still panic
+ 2021-06-14 7841cb14d9 doc/go1.17: assorted fixes
+ 2021-06-14 8a5a6f46dc debug/elf: don't apply DWARF relocations for ET_EXEC binaries
+ 2021-06-14 9d13f8d43e runtime: update the variable name in comment
+ 2021-06-14 0fd20ed5b6 reflect: use same conversion panic in reflect and runtime
+ 2021-06-14 6bbb0a9d4a cmd/internal/sys: mark windows/arm64 as c-shared-capable
+ 2021-06-14 d4f34f8c63 doc/go1.17: reword "results" in stack trace printing

Change-Id: I60d1f67c4d48cd4093c350fc89bd60c454d23944
This commit is contained in:
Cuong Manh Le 2021-06-16 14:52:05 +07:00
commit 4d6f9d60cf
25 changed files with 281 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
doc/go1.17.html
View File

@ -59,7 +59,7 @@ Do not send CLs removing the interior tags from such phrases.
</ul>
<p>
These enhancements were added to simplify writing code that conforms
The package unsafe enhancements were added to simplify writing code that conforms
to <code>unsafe.Pointer</code>'s <a href="/pkg/unsafe/#Pointer">safety
rules</a>, but the rules remain unchanged. In particular, existing
programs that correctly use <code>unsafe.Pointer</code> remain
@ -292,6 +292,18 @@ Do not send CLs removing the interior tags from such phrases.
<a href="https://golang.org/design/draft-gobuild">https://golang.org/design/draft-gobuild</a>.
</p>
<h4 id="go run"><code>go</code> <code>run</code></h4>
<p><!-- golang.org/issue/42088 -->
<code>go</code> <code>run</code> now accepts arguments with version suffixes
(for example, <code>go</code> <code>run</code>
<code>example.com/cmd@v1.0.0</code>). This causes <code>go</code>
<code>run</code> to build and run packages in module-aware mode, ignoring the
<code>go.mod</code> file in the current directory or any parent directory, if
there is one. This is useful for running executables without installing them or
without changing dependencies of the current module.
</p>
<h3 id="gofmt">Gofmt</h3>
<p>
@ -406,7 +418,8 @@ func Foo() bool {
by commas. Aggregate-typed (struct, array, string, slice, interface, and complex)
arguments are delimited by curly braces. A caveat is that the value of an
argument that only lives in a register and is not stored to memory may be
inaccurate. Results (which were usually inaccurate) are no longer printed.
inaccurate. Function return values (which were usually inaccurate) are no longer
printed.
</p>
<p><!-- CL 283112, golang.org/issue/28727 -->
@ -734,7 +747,7 @@ func Foo() bool {
These components were always interpreted as decimal, but some operating systems treat them as octal.
This mismatch could hypothetically lead to security issues if a Go application was used to validate IP addresses
which were then used in their original form with non-Go applications which interpreted components as octal. Generally,
it is advisable to always re-encoded values after validation, which avoids this class of parser misalignment issues.
it is advisable to always re-encode values after validation, which avoids this class of parser misalignment issues.
</p>
</dd>
</dl><!-- net -->
@ -785,7 +798,7 @@ func Foo() bool {
<dd>
<p><!-- CL 268020 -->
The <a href="/pkg/os/#File.WriteString"><code>File.WriteString</code></a> method
has been optimized to no longer make a copy of the input string.
has been optimized to not make a copy of the input string.
</p>
</dd>
</dl><!-- os -->
@ -811,6 +824,14 @@ func Foo() bool {
The <a href="/pkg/reflect/#ArrayOf"><code>ArrayOf</code></a> function now panics when
called with a negative length.
</p>
<p><!-- CL 301652 -->
Checking the <a href="/pkg/reflect/#Type"><code>Type.ConvertibleTo</code></a> method
is no longer sufficient to guarantee that a call to
<a href="/pkg/reflect/#Value.Convert"><code>Value.Convert</code></a> will not panic.
It may panic when converting `[]T` to `*[N]T` if the slice's length is less than N.
See the language changes section above.
</p>
</dd>
</dl><!-- reflect -->
@ -837,7 +858,7 @@ func Foo() bool {
<dd>
<p><!-- CL 170079, CL 170080 -->
The <code>strconv</code> package now uses Ulf Adams's Ryū algorithm for formatting floating-point numbers.
This algorithm improves performance on most inputs, and is more than 99% faster on worst-case inputs.
This algorithm improves performance on most inputs and is more than 99% faster on worst-case inputs.
</p>
<p><!-- CL 314775 -->

20
src/cmd/compile/internal/typecheck/const.go
View File

@ -633,6 +633,17 @@ func defaultlit2(l ir.Node, r ir.Node, force bool) (ir.Node, ir.Node) {
if l.Type() == nil || r.Type() == nil {
return l, r
}
if !l.Type().IsInterface() && !r.Type().IsInterface() {
// Can't mix bool with non-bool, string with non-string.
if l.Type().IsBoolean() != r.Type().IsBoolean() {
return l, r
}
if l.Type().IsString() != r.Type().IsString() {
return l, r
}
}
if !l.Type().IsUntyped() {
r = convlit(r, l.Type())
return l, r
@ -647,17 +658,10 @@ func defaultlit2(l ir.Node, r ir.Node, force bool) (ir.Node, ir.Node) {
return l, r
}
// Can't mix bool with non-bool, string with non-string, or nil with anything (untyped).
if l.Type().IsBoolean() != r.Type().IsBoolean() {
return l, r
}
if l.Type().IsString() != r.Type().IsString() {
return l, r
}
// Can't mix nil with anything untyped.
if ir.IsNil(l) || ir.IsNil(r) {
return l, r
}
t := defaultType(mixUntyped(l.Type(), r.Type()))
l = convlit(l, t)
r = convlit(r, t)

2
src/cmd/dist/test.go vendored
View File

@ -1057,7 +1057,7 @@ func (t *tester) supportedBuildmode(mode string) bool {
"darwin-amd64", "darwin-arm64",
"freebsd-amd64",
"android-arm", "android-arm64", "android-386",
"windows-amd64", "windows-386":
"windows-amd64", "windows-386", "windows-arm64":
return true
}
return false

42
src/cmd/go/alldocs.go
View File

@ -1568,7 +1568,7 @@
//
// A build constraint, also known as a build tag, is a line comment that begins
//
// // +build
// //go:build
//
// that lists the conditions under which a file should be included in the package.
// Constraints may appear in any kind of source file (not just Go), but
@ -1576,30 +1576,20 @@
// only by blank lines and other line comments. These rules mean that in Go
// files a build constraint must appear before the package clause.
//
// To distinguish build constraints from package documentation, a series of
// build constraints must be followed by a blank line.
// To distinguish build constraints from package documentation,
// a build constraint should be followed by a blank line.
//
// A build constraint is evaluated as the OR of space-separated options.
// Each option evaluates as the AND of its comma-separated terms.
// Each term consists of letters, digits, underscores, and dots.
// A term may be negated with a preceding !.
// For example, the build constraint:
// A build constraint is evaluated as an expression containing options
// combined by ||, &&, and ! operators and parentheses. Operators have
// the same meaning as in Go.
//
// // +build linux,386 darwin,!cgo
// For example, the following build constraint constrains a file to
// build when the "linux" and "386" constraints are satisfied, or when
// "darwin" is satisfied and "cgo" is not:
//
// corresponds to the boolean formula:
// //go:build (linux && 386) || (darwin && !cgo)
//
// (linux AND 386) OR (darwin AND (NOT cgo))
//
// A file may have multiple build constraints. The overall constraint is the AND
// of the individual constraints. That is, the build constraints:
//
// // +build linux darwin
// // +build amd64
//
// corresponds to the boolean formula:
//
// (linux OR darwin) AND amd64
// It is an error for a file to have more than one //go:build line.
//
// During a particular build, the following words are satisfied:
//
@ -1637,24 +1627,28 @@
//
// To keep a file from being considered for the build:
//
// // +build ignore
// //go:build ignore
//
// (any other unsatisfied word will work as well, but "ignore" is conventional.)
//
// To build a file only when using cgo, and only on Linux and OS X:
//
// // +build linux,cgo darwin,cgo
// //go:build cgo && (linux || darwin)
//
// Such a file is usually paired with another file implementing the
// default functionality for other systems, which in this case would
// carry the constraint:
//
// // +build !linux,!darwin !cgo
// //go:build !(cgo && (linux || darwin))
//
// Naming a file dns_windows.go will cause it to be included only when
// building the package for Windows; similarly, math_386.s will be included
// only when building the package for 32-bit x86.
//
// Go versions 1.16 and earlier used a different syntax for build constraints,
// with a "// +build" prefix. The gofmt command will add an equivalent //go:build
// constraint when encountering the older syntax.
//
//
// Build modes
//

42
src/cmd/go/internal/help/helpdoc.go
View File

@ -784,7 +784,7 @@ var HelpBuildConstraint = &base.Command{
Long: `
A build constraint, also known as a build tag, is a line comment that begins
// +build
//go:build
that lists the conditions under which a file should be included in the package.
Constraints may appear in any kind of source file (not just Go), but
@ -792,30 +792,20 @@ they must appear near the top of the file, preceded
only by blank lines and other line comments. These rules mean that in Go
files a build constraint must appear before the package clause.
To distinguish build constraints from package documentation, a series of
build constraints must be followed by a blank line.
To distinguish build constraints from package documentation,
a build constraint should be followed by a blank line.
A build constraint is evaluated as the OR of space-separated options.
Each option evaluates as the AND of its comma-separated terms.
Each term consists of letters, digits, underscores, and dots.
A term may be negated with a preceding !.
For example, the build constraint:
A build constraint is evaluated as an expression containing options
combined by ||, &&, and ! operators and parentheses. Operators have
the same meaning as in Go.
// +build linux,386 darwin,!cgo
For example, the following build constraint constrains a file to
build when the "linux" and "386" constraints are satisfied, or when
"darwin" is satisfied and "cgo" is not:
corresponds to the boolean formula:
//go:build (linux && 386) || (darwin && !cgo)
(linux AND 386) OR (darwin AND (NOT cgo))
A file may have multiple build constraints. The overall constraint is the AND
of the individual constraints. That is, the build constraints:
// +build linux darwin
// +build amd64
corresponds to the boolean formula:
(linux OR darwin) AND amd64
It is an error for a file to have more than one //go:build line.
During a particular build, the following words are satisfied:
@ -853,22 +843,26 @@ in addition to ios tags and files.
To keep a file from being considered for the build:
// +build ignore
//go:build ignore
(any other unsatisfied word will work as well, but "ignore" is conventional.)
To build a file only when using cgo, and only on Linux and OS X:
// +build linux,cgo darwin,cgo
//go:build cgo && (linux || darwin)
Such a file is usually paired with another file implementing the
default functionality for other systems, which in this case would
carry the constraint:
// +build !linux,!darwin !cgo
//go:build !(cgo && (linux || darwin))
Naming a file dns_windows.go will cause it to be included only when
building the package for Windows; similarly, math_386.s will be included
only when building the package for 32-bit x86.
Go versions 1.16 and earlier used a different syntax for build constraints,
with a "// +build" prefix. The gofmt command will add an equivalent //go:build
constraint when encountering the older syntax.
`,
}

18
src/cmd/go/internal/imports/read.go
View File

@ -8,6 +8,7 @@ package imports
import (
"bufio"
"bytes"
"errors"
"io"
"unicode/utf8"
@ -22,6 +23,19 @@ type importReader struct {
nerr int
}
var bom = []byte{0xef, 0xbb, 0xbf}
func newImportReader(b *bufio.Reader) *importReader {
// Remove leading UTF-8 BOM.
// Per https://golang.org/ref/spec#Source_code_representation:
// a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
// if it is the first Unicode code point in the source text.
if leadingBytes, err := b.Peek(3); err == nil && bytes.Equal(leadingBytes, bom) {
b.Discard(3)
}
return &importReader{b: b}
}
func isIdent(c byte) bool {
return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '_' || c >= utf8.RuneSelf
}
@ -201,7 +215,7 @@ func (r *importReader) readImport(imports *[]string) {
// ReadComments is like io.ReadAll, except that it only reads the leading
// block of comments in the file.
func ReadComments(f io.Reader) ([]byte, error) {
r := &importReader{b: bufio.NewReader(f)}
r := newImportReader(bufio.NewReader(f))
r.peekByte(true)
if r.err == nil && !r.eof {
// Didn't reach EOF, so must have found a non-space byte. Remove it.
@ -213,7 +227,7 @@ func ReadComments(f io.Reader) ([]byte, error) {
// ReadImports is like io.ReadAll, except that it expects a Go file as input
// and stops reading the input once the imports have completed.
func ReadImports(f io.Reader, reportSyntaxError bool, imports *[]string) ([]byte, error) {
r := &importReader{b: bufio.NewReader(f)}
r := newImportReader(bufio.NewReader(f))
r.readKeyword("package")
r.readIdent()

26
src/cmd/go/internal/imports/read_test.go
View File

@ -66,6 +66,10 @@ var readImportsTests = []readTest{
`,
"",
},
{
"\ufeff𝔻" + `package p; import "x";ℙvar x = 1`,
"",
},
}
var readCommentsTests = []readTest{
@ -81,6 +85,10 @@ var readCommentsTests = []readTest{
`ℙpackage p; import . "x"`,
"",
},
{
"\ufeff𝔻" + `ℙpackage p; import . "x"`,
"",
},
{
`// foo
@ -90,6 +98,19 @@ var readCommentsTests = []readTest{
/*/ zot */
// asdf
ℙHello, world`,
"",
},
{
"\ufeff𝔻" + `// foo
/* bar */
/* quux */ // baz
/*/ zot */
// asdf
ℙHello, world`,
"",
@ -107,6 +128,11 @@ func testRead(t *testing.T, tests []readTest, read func(io.Reader) ([]byte, erro
in = tt.in[:j] + tt.in[j+len("ℙ"):]
testOut = tt.in[:j]
}
d := strings.Index(tt.in, "𝔻")
if d >= 0 {
in = in[:d] + in[d+len("𝔻"):]
testOut = testOut[d+len("𝔻"):]
}
r := strings.NewReader(in)
buf, err := read(r)
if err != nil {

27
src/cmd/go/testdata/script/build_ignore_leading_bom.txt vendored Normal file
View File

@ -0,0 +1,27 @@
# Per https://golang.org/ref/spec#Source_code_representation:
# a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
# if it is the first Unicode code point in the source text.
go list -f 'Imports: {{.Imports}} EmbedFiles: {{.EmbedFiles}}' .
stdout '^Imports: \[embed m/hello\] EmbedFiles: \[.*file\]$'
-- go.mod --
module m
go 1.16
-- m.go --
package main
import (
_ "embed"
"m/hello"
)
//go:embed file
var s string
-- hello/hello.go --
package hello
-- file --

2
src/cmd/internal/sys/supported.go
View File

@ -74,7 +74,7 @@ func BuildModeSupported(compiler, buildmode, goos, goarch string) bool {
"android/amd64", "android/arm", "android/arm64", "android/386",
"freebsd/amd64",
"darwin/amd64", "darwin/arm64",
"windows/amd64", "windows/386":
"windows/amd64", "windows/386", "windows/arm64":
return true
}
return false

5
src/cmd/link/internal/ld/elf.go
View File

@ -950,6 +950,11 @@ func elfdynhash(ctxt *Link) {
}
s = ldr.CreateSymForUpdate(".dynamic", 0)
if ctxt.BuildMode == BuildModePIE {
// https://github.com/bminor/glibc/blob/895ef79e04a953cac1493863bcae29ad85657ee1/elf/elf.h#L986
const DTFLAGS_1_PIE = 0x08000000
Elfwritedynent(ctxt.Arch, s, elf.DT_FLAGS_1, uint64(DTFLAGS_1_PIE))
}
elfverneed = nfile
if elfverneed != 0 {
elfWriteDynEntSym(ctxt, s, elf.DT_VERNEED, gnuVersionR.Sym())

7
src/debug/elf/file.go
View File

@ -1164,6 +1164,13 @@ func (f *File) DWARF() (*dwarf.Data, error) {
b = dbuf
}
if f.Type == ET_EXEC {
// Do not apply relocations to DWARF sections for ET_EXEC binaries.
// Relocations should already be applied, and .rela sections may
// contain incorrect data.
return b, nil
}
for _, r := range f.Sections {
if r.Type != SHT_RELA && r.Type != SHT_REL {
continue

2
src/go/build/doc.go
View File

@ -59,7 +59,7 @@
//
// A build constraint, also known as a build tag, is a line comment that begins
//
// // +build
// //go:build
//
// that lists the conditions under which a file should be included in the
// package. Build constraints may also be part of a file's name

13
src/go/build/read.go
View File

@ -6,6 +6,7 @@ package build
import (
"bufio"
"bytes"
"errors"
"fmt"
"go/ast"
@ -28,9 +29,19 @@ type importReader struct {
pos token.Position
}
var bom = []byte{0xef, 0xbb, 0xbf}
func newImportReader(name string, r io.Reader) *importReader {
b := bufio.NewReader(r)
// Remove leading UTF-8 BOM.
// Per https://golang.org/ref/spec#Source_code_representation:
// a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
// if it is the first Unicode code point in the source text.
if leadingBytes, err := b.Peek(3); err == nil && bytes.Equal(leadingBytes, bom) {
b.Discard(3)
}
return &importReader{
b: bufio.NewReader(r),
b: b,
pos: token.Position{
Filename: name,
Line: 1,

36
src/go/build/read_test.go
View File

@ -66,6 +66,10 @@ var readGoInfoTests = []readTest{
`,
"",
},
{
"\ufeff𝔻" + `package p; import "x";ℙvar x = 1`,
"",
},
}
var readCommentsTests = []readTest{
@ -81,6 +85,10 @@ var readCommentsTests = []readTest{
`ℙpackage p; import . "x"`,
"",
},
{
"\ufeff𝔻" + `ℙpackage p; import . "x"`,
"",
},
{
`// foo
@ -90,6 +98,19 @@ var readCommentsTests = []readTest{
/*/ zot */
// asdf
ℙHello, world`,
"",
},
{
"\ufeff𝔻" + `// foo
/* bar */
/* quux */ // baz
/*/ zot */
// asdf
ℙHello, world`,
"",
@ -107,6 +128,11 @@ func testRead(t *testing.T, tests []readTest, read func(io.Reader) ([]byte, erro
in = tt.in[:j] + tt.in[j+len("ℙ"):]
testOut = tt.in[:j]
}
d := strings.Index(tt.in, "𝔻")
if d >= 0 {
in = in[:d] + in[d+len("𝔻"):]
testOut = testOut[d+len("𝔻"):]
}
r := strings.NewReader(in)
buf, err := read(r)
if err != nil {
@ -264,6 +290,12 @@ var readEmbedTests = []struct {
test:3:14:y
test:3:16:z`,
},
{
"\ufeffpackage p\nimport \"embed\"\n//go:embed x y z\nvar files embed.FS",
`test:3:12:x
test:3:14:y
test:3:16:z`,
},
{
"package p\nimport \"embed\"\nvar s = \"/*\"\n//go:embed x\nvar files embed.FS",
`test:4:12:x`,
@ -292,6 +324,10 @@ var readEmbedTests = []struct {
"package p\n//go:embed x y z\nvar files embed.FS", // no import, no scan
"",
},
{
"\ufeffpackage p\n//go:embed x y z\nvar files embed.FS", // no import, no scan
"",
},
}
func TestReadEmbed(t *testing.T) {

1
src/internal/bytealg/index_generic.go
View File

@ -2,7 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
//go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
// +build !amd64,!arm64,!s390x,!ppc64le,!ppc64

1
src/internal/bytealg/index_native.go
View File

@ -2,7 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// go:build amd64 || arm64 || s390x || ppc64le || ppc64
//go:build amd64 || arm64 || s390x || ppc64le || ppc64
// +build amd64 arm64 s390x ppc64le ppc64

10
src/net/http/server.go
View File

@ -333,7 +333,7 @@ func (c *conn) hijackLocked() (rwc net.Conn, buf *bufio.ReadWriter, err error) {
const bufferBeforeChunkingSize = 2048
// chunkWriter writes to a response's conn buffer, and is the writer
// wrapped by the response.bufw buffered writer.
// wrapped by the response.w buffered writer.
//
// chunkWriter also is responsible for finalizing the Header, including
// conditionally setting the Content-Type and setting a Content-Length
@ -1529,12 +1529,12 @@ func (w *response) bodyAllowed() bool {
// The Writers are wired together like:
//
// 1. *response (the ResponseWriter) ->
// 2. (*response).w, a *bufio.Writer of bufferBeforeChunkingSize bytes
// 2. (*response).w, a *bufio.Writer of bufferBeforeChunkingSize bytes ->
// 3. chunkWriter.Writer (whose writeHeader finalizes Content-Length/Type)
// and which writes the chunk headers, if needed.
// 4. conn.buf, a bufio.Writer of default (4kB) bytes, writing to ->
// and which writes the chunk headers, if needed ->
// 4. conn.bufw, a *bufio.Writer of default (4kB) bytes, writing to ->
// 5. checkConnErrorWriter{c}, which notes any non-nil error on Write
// and populates c.werr with it if so. but otherwise writes to:
// and populates c.werr with it if so, but otherwise writes to ->
// 6. the rwc, the net.Conn.
//
// TODO(bradfitz): short-circuit some of the buffering when the

2
src/reflect/all_test.go
View File

@ -4371,7 +4371,7 @@ func TestConvertPanic(t *testing.T) {
if !v.Type().ConvertibleTo(pt) {
t.Errorf("[]byte should be convertible to *[8]byte")
}
shouldPanic("reflect: cannot convert slice with length 4 to array pointer with length 8", func() {
shouldPanic("reflect: cannot convert slice with length 4 to pointer to array with length 8", func() {
_ = v.Convert(pt)
})
}

4
src/reflect/type.go
View File

@ -107,10 +107,14 @@ type Type interface {
// ConvertibleTo reports whether a value of the type is convertible to type u.
// Even if ConvertibleTo returns true, the conversion may still panic.
// For example, a slice of type []T is convertible to *[N]T,
// but the conversion will panic if its length is less than N.
ConvertibleTo(u Type) bool
// Comparable reports whether values of this type are comparable.
// Even if Comparable returns true, the comparison may still panic.
// For example, values of interface type are comparable,
// but the comparison will panic if their dynamic type is not comparable.
Comparable() bool
// Methods applicable only to some types, depending on Kind.

2
src/reflect/value.go
View File

@ -3067,7 +3067,7 @@ func cvtSliceArrayPtr(v Value, t Type) Value {
n := t.Elem().Len()
h := (*unsafeheader.Slice)(v.ptr)
if n > h.Len {
panic("reflect: cannot convert slice with length " + itoa.Itoa(h.Len) + " to array pointer with length " + itoa.Itoa(n))
panic("reflect: cannot convert slice with length " + itoa.Itoa(h.Len) + " to pointer to array with length " + itoa.Itoa(n))
}
return Value{t.common(), h.Data, v.flag&^(flagIndir|flagAddr|flagKindMask) | flag(Ptr)}
}

4
src/runtime/proc.go
View File

@ -516,8 +516,8 @@ var (
allglock mutex
allgs []*g
// allglen and allgptr are atomic variables that contain len(allg) and
// &allg[0] respectively. Proper ordering depends on totally-ordered
// allglen and allgptr are atomic variables that contain len(allgs) and
// &allgs[0] respectively. Proper ordering depends on totally-ordered
// loads and stores. Writes are protected by allglock.
//
// allgptr is updated before allglen. Readers should read allglen

1
src/syscall/exec_linux_test.go
View File

@ -318,6 +318,7 @@ func TestGroupCleanupUserNamespace(t *testing.T) {
"uid=0(root) gid=0(root) groups=0(root),65534",
"uid=0(root) gid=0(root) groups=0(root),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody)", // Alpine; see https://golang.org/issue/19938
"uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023", // CentOS with SELinux context, see https://golang.org/issue/34547
"uid=0(root) gid=0(root) groups=0(root),65534(nobody) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023", // Fedora with SElinux context, see https://golang.org/issue/46752
}
for _, e := range expected {
if strOut == e {

39
src/syscall/syscall_windows_test.go
View File

@ -10,7 +10,6 @@ import (
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"syscall"
"testing"
@ -79,10 +78,8 @@ func TestTOKEN_ALL_ACCESS(t *testing.T) {
func TestStdioAreInheritable(t *testing.T) {
testenv.MustHaveGoBuild(t)
testenv.MustHaveCGO(t)
testenv.MustHaveExecPath(t, "gcc")
if runtime.GOARCH == "arm64" || runtime.GOARCH == "arm" {
t.Skip("Powershell is not native on ARM; see golang.org/issues/46701")
}
tmpdir := t.TempDir()
@ -114,18 +111,28 @@ func main() {}
t.Fatalf("failed to build go library: %s\n%s", err, out)
}
// run powershell script
psscript := fmt.Sprintf(`
hostname;
$signature = " [DllImport("%q")] public static extern void HelloWorld(); ";
Add-Type -MemberDefinition $signature -Name World -Namespace Hello;
[Hello.World]::HelloWorld();
hostname;
`, dll)
psscript = strings.ReplaceAll(psscript, "\n", "")
out, err = exec.Command("powershell", "-Command", psscript).CombinedOutput()
// build c exe
const exetext = `
#include <stdlib.h>
#include <windows.h>
int main(int argc, char *argv[])
{
system("hostname");
((void(*)(void))GetProcAddress(LoadLibraryA(%q), "HelloWorld"))();
system("hostname");
return 0;
}
`
exe := filepath.Join(tmpdir, "helloworld.exe")
cmd = exec.Command("gcc", "-o", exe, "-xc", "-")
cmd.Stdin = strings.NewReader(fmt.Sprintf(exetext, dll))
out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
if err != nil {
t.Fatalf("Powershell command failed: %v: %v", err, string(out))
t.Fatalf("failed to build c executable: %s\n%s", err, out)
}
out, err = exec.Command(exe).CombinedOutput()
if err != nil {
t.Fatalf("c program execution failed: %v: %v", err, string(out))
}
hostname, err := os.Hostname()
@ -137,6 +144,6 @@ hostname;
have = strings.ReplaceAll(have, "\r", "")
want := fmt.Sprintf("%sHello World%s", hostname, hostname)
if have != want {
t.Fatalf("Powershell command output is wrong: got %q, want %q", have, want)
t.Fatalf("c program output is wrong: got %q, want %q", have, want)
}
}

37
test/fixedbugs/issue46749.go Normal file
View File

@ -0,0 +1,37 @@
// errorcheck
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package p
var s string
var b bool
var i int
var iface interface{}
var (
_ = "" + b // ERROR "invalid operation.*mismatched types.*untyped string and bool"
_ = "" + i // ERROR "invalid operation.*mismatched types.*untyped string and int"
_ = "" + nil // ERROR "invalid operation.*mismatched types.*untyped string and nil"
)
var (
_ = s + false // ERROR "invalid operation.*mismatched types.*string and untyped bool"
_ = s + 1 // ERROR "invalid operation.*mismatched types.*string and untyped int"
_ = s + nil // ERROR "invalid operation.*mismatched types.*string and nil"
)
var (
_ = "" + false // ERROR "invalid operation.*mismatched types.*untyped string and untyped bool"
_ = "" + 1 // ERROR "invalid operation.*mismatched types.*untyped string and untyped int"
)
var (
_ = b + 1 // ERROR "invalid operation.*mismatched types.*bool and untyped int"
_ = i + false // ERROR "invalid operation.*mismatched types.*int and untyped bool"
_ = iface + 1 // ERROR "invalid operation.*mismatched types.*interface {} and int"
_ = iface + 1.0 // ERROR "invalid operation.*mismatched types.*interface {} and float64"
_ = iface + false // ERROR "invalid operation.*mismatched types.*interface {} and bool"
)

1
test/run.go
View File

@ -2089,6 +2089,7 @@ var excludedFiles = map[string]bool{
"fixedbugs/issue7525d.go": true, // types2 reports init cycle error on different line - ok otherwise
"fixedbugs/issue7525e.go": true, // types2 reports init cycle error on different line - ok otherwise
"fixedbugs/issue7525.go": true, // types2 reports init cycle error on different line - ok otherwise
"fixedbugs/issue46749.go": true, // types2 reports can not convert error instead of type mismatched
"fixedbugs/issue9691.go": true, // "cannot assign to int(.autotmp_4)" (probably irgen's fault)
// tests that rely on -m diagnostics, which currently differ with -G=3