Reduce data races (#14549)

* Add race conditions into test

* Fix Race in GetManager()

* DataAsync() use error chan

* just log no chan

* finish
This commit is contained in:
6543 2021-02-03 22:36:38 +01:00 committed by GitHub
parent 0d1444751f
commit 87009ab40a
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 18 additions and 6 deletions

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@ -11,6 +11,8 @@ import (
"io" "io"
"strconv" "strconv"
"strings" "strings"
gitea_log "code.gitea.io/gitea/modules/log"
) )
// Blob represents a Git object. // Blob represents a Git object.
@ -27,13 +29,13 @@ type Blob struct {
// Calling the Close function on the result will discard all unread output. // Calling the Close function on the result will discard all unread output.
func (b *Blob) DataAsync() (io.ReadCloser, error) { func (b *Blob) DataAsync() (io.ReadCloser, error) {
stdoutReader, stdoutWriter := io.Pipe() stdoutReader, stdoutWriter := io.Pipe()
var err error
go func() { go func() {
stderr := &strings.Builder{} stderr := &strings.Builder{}
err = NewCommand("cat-file", "--batch").RunInDirFullPipeline(b.repoPath, stdoutWriter, stderr, strings.NewReader(b.ID.String()+"\n")) err := NewCommand("cat-file", "--batch").RunInDirFullPipeline(b.repoPath, stdoutWriter, stderr, strings.NewReader(b.ID.String()+"\n"))
if err != nil { if err != nil {
err = ConcatenateError(err, stderr.String()) err = ConcatenateError(err, stderr.String())
gitea_log.Error("Blob.DataAsync Error: %v", err)
_ = stdoutWriter.CloseWithError(err) _ = stdoutWriter.CloseWithError(err)
} else { } else {
_ = stdoutWriter.Close() _ = stdoutWriter.Close()
@ -50,8 +52,8 @@ func (b *Blob) DataAsync() (io.ReadCloser, error) {
return &LimitedReaderCloser{ return &LimitedReaderCloser{
R: bufReader, R: bufReader,
C: stdoutReader, C: stdoutReader,
N: int64(size), N: size,
}, err }, nil
} }
// Size returns the uncompressed size of the blob // Size returns the uncompressed size of the blob

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@ -25,6 +25,7 @@ var (
// ErrExecTimeout represent a timeout error // ErrExecTimeout represent a timeout error
ErrExecTimeout = errors.New("Process execution timeout") ErrExecTimeout = errors.New("Process execution timeout")
manager *Manager manager *Manager
managerInit sync.Once
// DefaultContext is the default context to run processing commands in // DefaultContext is the default context to run processing commands in
DefaultContext = context.Background() DefaultContext = context.Background()
@ -48,11 +49,11 @@ type Manager struct {
// GetManager returns a Manager and initializes one as singleton if there's none yet // GetManager returns a Manager and initializes one as singleton if there's none yet
func GetManager() *Manager { func GetManager() *Manager {
if manager == nil { managerInit.Do(func() {
manager = &Manager{ manager = &Manager{
processes: make(map[int64]*Process), processes: make(map[int64]*Process),
} }
} })
return manager return manager
} }

View File

@ -12,6 +12,15 @@ import (
"github.com/stretchr/testify/assert" "github.com/stretchr/testify/assert"
) )
func TestGetManager(t *testing.T) {
go func() {
// test race protection
_ = GetManager()
}()
pm := GetManager()
assert.NotNil(t, pm)
}
func TestManager_Add(t *testing.T) { func TestManager_Add(t *testing.T) {
pm := Manager{processes: make(map[int64]*Process)} pm := Manager{processes: make(map[int64]*Process)}