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[dev.boringcrypto.go1.16] all: merge go1.16.15 into dev.boringcrypto.go1.16

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Change-Id: I574f47761ceb4e224a2a31b5096e27126f171238
This commit is contained in:
Carlos Amedee 2022-03-07 12:32:05 -05:00
commit 649671b08f
12 changed files with 281 additions and 51 deletions
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4
src/cmd/compile/internal/ssa/gen/RISCV64.rules
View File

@ -249,7 +249,7 @@
(Leq64F ...) => (FLED ...)
(Leq32F ...) => (FLES ...)
(EqPtr x y) => (SEQZ (SUB <x.Type> x y))
(EqPtr x y) => (SEQZ (SUB <typ.Uintptr> x y))
(Eq64 x y) => (SEQZ (SUB <x.Type> x y))
(Eq32 x y) => (SEQZ (SUBW <x.Type> x y))
(Eq16 x y) => (SEQZ (SUB <x.Type> (ZeroExt16to64 x) (ZeroExt16to64 y)))
@ -257,7 +257,7 @@
(Eq64F ...) => (FEQD ...)
(Eq32F ...) => (FEQS ...)
(NeqPtr x y) => (SNEZ (SUB <x.Type> x y))
(NeqPtr x y) => (SNEZ (SUB <typ.Uintptr> x y))
(Neq64 x y) => (SNEZ (SUB <x.Type> x y))
(Neq32 x y) => (SNEZ (SUBW <x.Type> x y))
(Neq16 x y) => (SNEZ (SUB <x.Type> (ZeroExt16to64 x) (ZeroExt16to64 y)))

10
src/cmd/compile/internal/ssa/rewriteRISCV64.go
View File

@ -960,13 +960,14 @@ func rewriteValueRISCV64_OpEqPtr(v *Value) bool {
v_1 := v.Args[1]
v_0 := v.Args[0]
b := v.Block
typ := &b.Func.Config.Types
// match: (EqPtr x y)
// result: (SEQZ (SUB <x.Type> x y))
// result: (SEQZ (SUB <typ.Uintptr> x y))
for {
x := v_0
y := v_1
v.reset(OpRISCV64SEQZ)
v0 := b.NewValue0(v.Pos, OpRISCV64SUB, x.Type)
v0 := b.NewValue0(v.Pos, OpRISCV64SUB, typ.Uintptr)
v0.AddArg2(x, y)
v.AddArg(v0)
return true
@ -2519,13 +2520,14 @@ func rewriteValueRISCV64_OpNeqPtr(v *Value) bool {
v_1 := v.Args[1]
v_0 := v.Args[0]
b := v.Block
typ := &b.Func.Config.Types
// match: (NeqPtr x y)
// result: (SNEZ (SUB <x.Type> x y))
// result: (SNEZ (SUB <typ.Uintptr> x y))
for {
x := v_0
y := v_1
v.reset(OpRISCV64SNEZ)
v0 := b.NewValue0(v.Pos, OpRISCV64SUB, x.Type)
v0 := b.NewValue0(v.Pos, OpRISCV64SUB, typ.Uintptr)
v0.AddArg2(x, y)
v.AddArg(v0)
return true

53
src/cmd/go/internal/modfetch/coderepo.go
View File

@ -305,17 +305,46 @@ func (r *codeRepo) convert(info *codehost.RevInfo, statVers string) (*RevInfo, e
//
// (If the version is +incompatible, then the go.mod file must not exist:
// +incompatible is not an ongoing opt-out from semantic import versioning.)
var canUseIncompatible func() bool
canUseIncompatible = func() bool {
var ok bool
if r.codeDir == "" && r.pathMajor == "" {
incompatibleOk := map[string]bool{}
canUseIncompatible := func(v string) bool {
if r.codeDir != "" || r.pathMajor != "" {
// A non-empty codeDir indicates a module within a subdirectory,
// which necessarily has a go.mod file indicating the module boundary.
// A non-empty pathMajor indicates a module path with a major-version
// suffix, which must match.
return false
}
ok, seen := incompatibleOk[""]
if !seen {
_, errGoMod := r.code.ReadFile(info.Name, "go.mod", codehost.MaxGoMod)
if errGoMod != nil {
ok = true
ok = (errGoMod != nil)
incompatibleOk[""] = ok
}
if !ok {
// A go.mod file exists at the repo root.
return false
}
// Per https://go.dev/issue/51324, previous versions of the 'go' command
// didn't always check for go.mod files in subdirectories, so if the user
// requests a +incompatible version explicitly, we should continue to allow
// it. Otherwise, if vN/go.mod exists, expect that release tags for that
// major version are intended for the vN module.
if v != "" && !strings.HasSuffix(statVers, "+incompatible") {
major := semver.Major(v)
ok, seen = incompatibleOk[major]
if !seen {
_, errGoModSub := r.code.ReadFile(info.Name, path.Join(major, "go.mod"), codehost.MaxGoMod)
ok = (errGoModSub != nil)
incompatibleOk[major] = ok
}
if !ok {
return false
}
}
canUseIncompatible = func() bool { return ok }
return ok
return true
}
// checkCanonical verifies that the canonical version v is compatible with the
@ -367,7 +396,7 @@ func (r *codeRepo) convert(info *codehost.RevInfo, statVers string) (*RevInfo, e
base := strings.TrimSuffix(v, "+incompatible")
var errIncompatible error
if !module.MatchPathMajor(base, r.pathMajor) {
if canUseIncompatible() {
if canUseIncompatible(base) {
v = base + "+incompatible"
} else {
if r.pathMajor != "" {
@ -495,7 +524,7 @@ func (r *codeRepo) convert(info *codehost.RevInfo, statVers string) (*RevInfo, e
// Save the highest non-retracted canonical tag for the revision.
// If we don't find a better match, we'll use it as the canonical version.
if tagIsCanonical && semver.Compare(highestCanonical, v) < 0 && !isRetracted(v) {
if module.MatchPathMajor(v, r.pathMajor) || canUseIncompatible() {
if module.MatchPathMajor(v, r.pathMajor) || canUseIncompatible(v) {
highestCanonical = v
}
}
@ -513,12 +542,12 @@ func (r *codeRepo) convert(info *codehost.RevInfo, statVers string) (*RevInfo, e
// retracted versions.
allowedMajor := func(major string) func(v string) bool {
return func(v string) bool {
return (major == "" || semver.Major(v) == major) && !isRetracted(v)
return ((major == "" && canUseIncompatible(v)) || semver.Major(v) == major) && !isRetracted(v)
}
}
if pseudoBase == "" {
var tag string
if r.pseudoMajor != "" || canUseIncompatible() {
if r.pseudoMajor != "" || canUseIncompatible("") {
tag, _ = r.code.RecentTag(info.Name, tagPrefix, allowedMajor(r.pseudoMajor))
} else {
// Allow either v1 or v0, but not incompatible higher versions.

48
src/cmd/go/internal/modfetch/coderepo_test.go
View File

@ -458,6 +458,54 @@ var codeRepoTests = []codeRepoTest{
rev: "v3.0.0-devel",
err: `resolves to version v0.1.1-0.20220203155313-d59622f6e4d7 (v3.0.0-devel is not a tag)`,
},
// If v2/go.mod exists, then we should prefer to match the "v2"
// pseudo-versions to the nested module, and resolve the module in the parent
// directory to only compatible versions.
//
// However (https://go.dev/issue/51324), previous versions of the 'go' command
// didn't always do so, so if the user explicitly requests a +incompatible
// version (as would be present in an existing go.mod file), we should
// continue to allow it.
{
vcs: "git",
path: "vcs-test.golang.org/git/v2sub.git",
rev: "80beb17a1603",
version: "v0.0.0-20220222205507-80beb17a1603",
name: "80beb17a16036f17a5aedd1bb5bd6d407b3c6dc5",
short: "80beb17a1603",
time: time.Date(2022, 2, 22, 20, 55, 7, 0, time.UTC),
},
{
vcs: "git",
path: "vcs-test.golang.org/git/v2sub.git",
rev: "v2.0.0",
err: `module contains a go.mod file, so module path must match major version ("vcs-test.golang.org/git/v2sub.git/v2")`,
},
{
vcs: "git",
path: "vcs-test.golang.org/git/v2sub.git",
rev: "v2.0.1-0.20220222205507-80beb17a1603",
err: `module contains a go.mod file, so module path must match major version ("vcs-test.golang.org/git/v2sub.git/v2")`,
},
{
vcs: "git",
path: "vcs-test.golang.org/git/v2sub.git",
rev: "v2.0.0+incompatible",
version: "v2.0.0+incompatible",
name: "5fcd3eaeeb391d399f562fd45a50dac9fc34ae8b",
short: "5fcd3eaeeb39",
time: time.Date(2022, 2, 22, 20, 53, 33, 0, time.UTC),
},
{
vcs: "git",
path: "vcs-test.golang.org/git/v2sub.git",
rev: "v2.0.1-0.20220222205507-80beb17a1603+incompatible",
version: "v2.0.1-0.20220222205507-80beb17a1603+incompatible",
name: "80beb17a16036f17a5aedd1bb5bd6d407b3c6dc5",
short: "80beb17a1603",
time: time.Date(2022, 2, 22, 20, 55, 7, 0, time.UTC),
},
}
func TestCodeRepo(t *testing.T) {

6
src/net/dnsclient_unix.go
View File

@ -29,6 +29,10 @@ const (
// to be used as a useTCP parameter to exchange
useTCPOnly = true
useUDPOrTCP = false
// Maximum DNS packet size.
// Value taken from https://dnsflagday.net/2020/.
maxDNSPacketSize = 1232
)
var (
@ -81,7 +85,7 @@ func dnsPacketRoundTrip(c Conn, id uint16, query dnsmessage.Question, b []byte)
return dnsmessage.Parser{}, dnsmessage.Header{}, err
}
b = make([]byte, 512) // see RFC 1035
b = make([]byte, maxDNSPacketSize)
for {
n, err := c.Read(b)
if err != nil {

2
src/net/dnsclient_unix_test.go
View File

@ -881,7 +881,7 @@ func (f *fakeDNSPacketConn) Close() error {
func TestIgnoreDNSForgeries(t *testing.T) {
c, s := Pipe()
go func() {
b := make([]byte, 512)
b := make([]byte, maxDNSPacketSize)
n, err := s.Read(b)
if err != nil {
t.Error(err)

72
src/regexp/syntax/parse.go
View File

@ -76,13 +76,29 @@ const (
opVerticalBar
)
// maxHeight is the maximum height of a regexp parse tree.
// It is somewhat arbitrarily chosen, but the idea is to be large enough
// that no one will actually hit in real use but at the same time small enough
// that recursion on the Regexp tree will not hit the 1GB Go stack limit.
// The maximum amount of stack for a single recursive frame is probably
// closer to 1kB, so this could potentially be raised, but it seems unlikely
// that people have regexps nested even this deeply.
// We ran a test on Google's C++ code base and turned up only
// a single use case with depth > 100; it had depth 128.
// Using depth 1000 should be plenty of margin.
// As an optimization, we don't even bother calculating heights
// until we've allocated at least maxHeight Regexp structures.
const maxHeight = 1000
type parser struct {
flags Flags // parse mode flags
stack []*Regexp // stack of parsed expressions
free *Regexp
numCap int // number of capturing groups seen
wholeRegexp string
tmpClass []rune // temporary char class work space
tmpClass []rune // temporary char class work space
numRegexp int // number of regexps allocated
height map[*Regexp]int // regexp height for height limit check
}
func (p *parser) newRegexp(op Op) *Regexp {
@ -92,16 +108,52 @@ func (p *parser) newRegexp(op Op) *Regexp {
*re = Regexp{}
} else {
re = new(Regexp)
p.numRegexp++
}
re.Op = op
return re
}
func (p *parser) reuse(re *Regexp) {
if p.height != nil {
delete(p.height, re)
}
re.Sub0[0] = p.free
p.free = re
}
func (p *parser) checkHeight(re *Regexp) {
if p.numRegexp < maxHeight {
return
}
if p.height == nil {
p.height = make(map[*Regexp]int)
for _, re := range p.stack {
p.checkHeight(re)
}
}
if p.calcHeight(re, true) > maxHeight {
panic(ErrInternalError)
}
}
func (p *parser) calcHeight(re *Regexp, force bool) int {
if !force {
if h, ok := p.height[re]; ok {
return h
}
}
h := 1
for _, sub := range re.Sub {
hsub := p.calcHeight(sub, false)
if h < 1+hsub {
h = 1 + hsub
}
}
p.height[re] = h
return h
}
// Parse stack manipulation.
// push pushes the regexp re onto the parse stack and returns the regexp.
@ -137,6 +189,7 @@ func (p *parser) push(re *Regexp) *Regexp {
}
p.stack = append(p.stack, re)
p.checkHeight(re)
return re
}
@ -246,6 +299,7 @@ func (p *parser) repeat(op Op, min, max int, before, after, lastRepeat string) (
re.Sub = re.Sub0[:1]
re.Sub[0] = sub
p.stack[n-1] = re
p.checkHeight(re)
if op == OpRepeat && (min >= 2 || max >= 2) && !repeatIsValid(re, 1000) {
return "", &Error{ErrInvalidRepeatSize, before[:len(before)-len(after)]}
@ -693,6 +747,21 @@ func literalRegexp(s string, flags Flags) *Regexp {
// Flags, and returns a regular expression parse tree. The syntax is
// described in the top-level comment.
func Parse(s string, flags Flags) (*Regexp, error) {
return parse(s, flags)
}
func parse(s string, flags Flags) (_ *Regexp, err error) {
defer func() {
switch r := recover(); r {
default:
panic(r)
case nil:
// ok
case ErrInternalError:
err = &Error{Code: ErrInternalError, Expr: s}
}
}()
if flags&Literal != 0 {
// Trivial parser for literal string.
if err := checkUTF8(s); err != nil {
@ -704,7 +773,6 @@ func Parse(s string, flags Flags) (*Regexp, error) {
// Otherwise, must do real work.
var (
p parser
err error
c rune
op Op
lastRepeat string

7
src/regexp/syntax/parse_test.go
View File

@ -207,6 +207,11 @@ var parseTests = []parseTest{
// Valid repetitions.
{`((((((((((x{2}){2}){2}){2}){2}){2}){2}){2}){2}))`, ``},
{`((((((((((x{1}){2}){2}){2}){2}){2}){2}){2}){2}){2})`, ``},
// Valid nesting.
{strings.Repeat("(", 999) + strings.Repeat(")", 999), ``},
{strings.Repeat("(?:", 999) + strings.Repeat(")*", 999), ``},
{"(" + strings.Repeat("|", 12345) + ")", ``}, // not nested at all
}
const testFlags = MatchNL | PerlX | UnicodeGroups
@ -482,6 +487,8 @@ var invalidRegexps = []string{
`a{100000}`,
`a{100000,}`,
"((((((((((x{2}){2}){2}){2}){2}){2}){2}){2}){2}){2})",
strings.Repeat("(", 1000) + strings.Repeat(")", 1000),
strings.Repeat("(?:", 1000) + strings.Repeat(")*", 1000),
`\Q\E*`,
}

2
src/runtime/export_test.go
View File

@ -1226,3 +1226,5 @@ func (th *TimeHistogram) Count(bucket, subBucket uint) (uint64, bool) {
func (th *TimeHistogram) Record(duration int64) {
(*timeHistogram)(th).record(duration)
}
var TimeHistogramMetricsBuckets = timeHistogramMetricsBuckets

52
src/runtime/histogram.go
View File

@ -47,7 +47,7 @@ const (
// │ └---- Next 4 bits -> sub-bucket 1
// └------- Bit 5 set -> super-bucket 2
//
// Following this pattern, bucket 45 will have the bit 48 set. We don't
// Following this pattern, super-bucket 44 will have the bit 47 set. We don't
// have any buckets for higher values, so the highest sub-bucket will
// contain values of 2^48-1 nanoseconds or approx. 3 days. This range is
// more than enough to handle durations produced by the runtime.
@ -135,36 +135,30 @@ func float64NegInf() float64 {
func timeHistogramMetricsBuckets() []float64 {
b := make([]float64, timeHistTotalBuckets+1)
b[0] = float64NegInf()
for i := 0; i < timeHistNumSuperBuckets; i++ {
superBucketMin := uint64(0)
// The (inclusive) minimum for the first non-negative bucket is 0.
if i > 0 {
// The minimum for the second bucket will be
// 1 << timeHistSubBucketBits, indicating that all
// sub-buckets are represented by the next timeHistSubBucketBits
// bits.
// Thereafter, we shift up by 1 each time, so we can represent
// this pattern as (i-1)+timeHistSubBucketBits.
superBucketMin = uint64(1) << uint(i-1+timeHistSubBucketBits)
}
// subBucketShift is the amount that we need to shift the sub-bucket
// index to combine it with the bucketMin.
subBucketShift := uint(0)
if i > 1 {
// The first two super buckets are exact with respect to integers,
// so we'll never have to shift the sub-bucket index. Thereafter,
// we shift up by 1 with each subsequent bucket.
subBucketShift = uint(i - 2)
}
// Super-bucket 0 has no bits above timeHistSubBucketBits
// set, so just iterate over each bucket and assign the
// incrementing bucket.
for i := 0; i < timeHistNumSubBuckets; i++ {
bucketNanos := uint64(i)
b[i+1] = float64(bucketNanos) / 1e9
}
// Generate the rest of the super-buckets. It's easier to reason
// about if we cut out the 0'th bucket, so subtract one since
// we just handled that bucket.
for i := 0; i < timeHistNumSuperBuckets-1; i++ {
for j := 0; j < timeHistNumSubBuckets; j++ {
// j is the sub-bucket index. By shifting the index into position to
// combine with the bucket minimum, we obtain the minimum value for that
// sub-bucket.
subBucketMin := superBucketMin + (uint64(j) << subBucketShift)
// Convert the subBucketMin which is in nanoseconds to a float64 seconds value.
// Set the super-bucket bit.
bucketNanos := uint64(1) << (i + timeHistSubBucketBits)
// Set the sub-bucket bits.
bucketNanos |= uint64(j) << i
// The index for this bucket is going to be the (i+1)'th super bucket
// (note that we're starting from zero, but handled the first super-bucket
// earlier, so we need to compensate), and the j'th sub bucket.
// Add 1 because we left space for -Inf.
bucketIndex := (i+1)*timeHistNumSubBuckets + j + 1
// Convert nanoseconds to seconds via a division.
// These values will all be exactly representable by a float64.
b[i*timeHistNumSubBuckets+j+1] = float64(subBucketMin) / 1e9
b[bucketIndex] = float64(bucketNanos) / 1e9
}
}
b[len(b)-1] = float64Inf()

40
src/runtime/histogram_test.go
View File

@ -68,3 +68,43 @@ func TestTimeHistogram(t *testing.T) {
dummyTimeHistogram = TimeHistogram{}
}
func TestTimeHistogramMetricsBuckets(t *testing.T) {
buckets := TimeHistogramMetricsBuckets()
nonInfBucketsLen := TimeHistNumSubBuckets * TimeHistNumSuperBuckets
expBucketsLen := nonInfBucketsLen + 2 // Count -Inf and +Inf.
if len(buckets) != expBucketsLen {
t.Fatalf("unexpected length of buckets: got %d, want %d", len(buckets), expBucketsLen)
}
// Check the first non-Inf 2*TimeHistNumSubBuckets buckets in order, skipping the
// first bucket which should be -Inf (checked later).
//
// Because of the way this scheme works, the bottom TimeHistNumSubBuckets
// buckets are fully populated, and then the next TimeHistNumSubBuckets
// have the TimeHistSubBucketBits'th bit set, while the bottom are once
// again fully populated.
for i := 1; i <= 2*TimeHistNumSubBuckets+1; i++ {
if got, want := buckets[i], float64(i-1)/1e9; got != want {
t.Errorf("expected bucket %d to have value %e, got %e", i, want, got)
}
}
// Check some values.
idxToBucket := map[int]float64{
0: math.Inf(-1),
33: float64(0x10<<1) / 1e9,
34: float64(0x11<<1) / 1e9,
49: float64(0x10<<2) / 1e9,
58: float64(0x19<<2) / 1e9,
65: float64(0x10<<3) / 1e9,
513: float64(0x10<<31) / 1e9,
519: float64(0x16<<31) / 1e9,
expBucketsLen - 2: float64(0x1f<<43) / 1e9,
expBucketsLen - 1: math.Inf(1),
}
for idx, bucket := range idxToBucket {
if got, want := buckets[idx], bucket; got != want {
t.Errorf("expected bucket %d to have value %e, got %e", idx, want, got)
}
}
}

36
test/fixedbugs/issue51101.go Normal file
View File

@ -0,0 +1,36 @@
// run
// Copyright 2022 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.
// Issue 51101: on RISCV64, difference of two pointers
// was marked as pointer and crashes GC.
package main
var a, b int
func main() {
F(&b, &a)
}
//go:noinline
func F(a, b *int) bool {
x := a == b
G(x)
y := a != b
return y
}
//go:noinline
func G(bool) {
grow([1000]int{20})
}
func grow(x [1000]int) {
if x[0] != 0 {
x[0]--
grow(x)
}
}