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-rw-r--r--src/runtime/chanbarrier_test.go83
1 files changed, 83 insertions, 0 deletions
diff --git a/src/runtime/chanbarrier_test.go b/src/runtime/chanbarrier_test.go
new file mode 100644
index 0000000..d479574
--- /dev/null
+++ b/src/runtime/chanbarrier_test.go
@@ -0,0 +1,83 @@
+// Copyright 2015 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 runtime_test
+
+import (
+ "runtime"
+ "sync"
+ "testing"
+)
+
+type response struct {
+}
+
+type myError struct {
+}
+
+func (myError) Error() string { return "" }
+
+func doRequest(useSelect bool) (*response, error) {
+ type async struct {
+ resp *response
+ err error
+ }
+ ch := make(chan *async, 0)
+ done := make(chan struct{}, 0)
+
+ if useSelect {
+ go func() {
+ select {
+ case ch <- &async{resp: nil, err: myError{}}:
+ case <-done:
+ }
+ }()
+ } else {
+ go func() {
+ ch <- &async{resp: nil, err: myError{}}
+ }()
+ }
+
+ r := <-ch
+ runtime.Gosched()
+ return r.resp, r.err
+}
+
+func TestChanSendSelectBarrier(t *testing.T) {
+ testChanSendBarrier(true)
+}
+
+func TestChanSendBarrier(t *testing.T) {
+ testChanSendBarrier(false)
+}
+
+func testChanSendBarrier(useSelect bool) {
+ var wg sync.WaitGroup
+ var globalMu sync.Mutex
+ outer := 100
+ inner := 100000
+ if testing.Short() || runtime.GOARCH == "wasm" {
+ outer = 10
+ inner = 1000
+ }
+ for i := 0; i < outer; i++ {
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ var garbage []byte
+ for j := 0; j < inner; j++ {
+ _, err := doRequest(useSelect)
+ _, ok := err.(myError)
+ if !ok {
+ panic(1)
+ }
+ garbage = make([]byte, 1<<10)
+ }
+ globalMu.Lock()
+ global = garbage
+ globalMu.Unlock()
+ }()
+ }
+ wg.Wait()
+}