add test case for #32912

Author: nyuichi

src/runtime/vdso_test.go

@@ -0,0 +1,46 @@
+// Copyright 2019 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.
+
+// invoke signal hander in the VDSO context
+// see issue 32912
+
+package runtime_test
+
+import (
+   "fmt"
+   "io/ioutil"
+   "os"
+   "runtime/pprof"
+   "time"
+   "testing"
+)
+
+func TestVDSO(t *testing.T) {
+        f, err := ioutil.TempFile("", "timeprofnow")
+        if err != nil {
+                fmt.Fprintln(os.Stderr, err)
+                os.Exit(2)
+        }
+        if err := pprof.StartCPUProfile(f); err != nil {
+                fmt.Fprintln(os.Stderr, err)
+                os.Exit(2)
+        }
+        t0 := time.Now()
+        t1 := t0
+        // We should get a profiling signal 100 times a second,
+        // so running for 10 seconds should be sufficient.
+        for t1.Sub(t0) < 10*time.Second {
+                t1 = time.Now()
+        }
+        pprof.StopCPUProfile()
+        name := f.Name()
+        if err := f.Close(); err != nil {
+                fmt.Fprintln(os.Stderr, err)
+                os.Exit(2)
+        }
+        if err := os.Remove(name); err != nil {
+                fmt.Fprintln(os.Stderr, err)
+                os.Exit(2)
+        }
+}