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-rw-r--r--src/runtime/testdata/testprogcgo/numgoroutine.go93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/runtime/testdata/testprogcgo/numgoroutine.go b/src/runtime/testdata/testprogcgo/numgoroutine.go
new file mode 100644
index 0000000..1b9f202
--- /dev/null
+++ b/src/runtime/testdata/testprogcgo/numgoroutine.go
@@ -0,0 +1,93 @@
+// Copyright 2017 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.
+
+//go:build !plan9 && !windows
+// +build !plan9,!windows
+
+package main
+
+/*
+#include <stddef.h>
+#include <pthread.h>
+
+extern void CallbackNumGoroutine();
+
+static void* thread2(void* arg __attribute__ ((unused))) {
+ CallbackNumGoroutine();
+ return NULL;
+}
+
+static void CheckNumGoroutine() {
+ pthread_t tid;
+ pthread_create(&tid, NULL, thread2, NULL);
+ pthread_join(tid, NULL);
+}
+*/
+import "C"
+
+import (
+ "fmt"
+ "runtime"
+ "strings"
+)
+
+var baseGoroutines int
+
+func init() {
+ register("NumGoroutine", NumGoroutine)
+}
+
+func NumGoroutine() {
+ // Test that there are just the expected number of goroutines
+ // running. Specifically, test that the spare M's goroutine
+ // doesn't show up.
+ if _, ok := checkNumGoroutine("first", 1+baseGoroutines); !ok {
+ return
+ }
+
+ // Test that the goroutine for a callback from C appears.
+ if C.CheckNumGoroutine(); !callbackok {
+ return
+ }
+
+ // Make sure we're back to the initial goroutines.
+ if _, ok := checkNumGoroutine("third", 1+baseGoroutines); !ok {
+ return
+ }
+
+ fmt.Println("OK")
+}
+
+func checkNumGoroutine(label string, want int) (string, bool) {
+ n := runtime.NumGoroutine()
+ if n != want {
+ fmt.Printf("%s NumGoroutine: want %d; got %d\n", label, want, n)
+ return "", false
+ }
+
+ sbuf := make([]byte, 32<<10)
+ sbuf = sbuf[:runtime.Stack(sbuf, true)]
+ n = strings.Count(string(sbuf), "goroutine ")
+ if n != want {
+ fmt.Printf("%s Stack: want %d; got %d:\n%s\n", label, want, n, string(sbuf))
+ return "", false
+ }
+ return string(sbuf), true
+}
+
+var callbackok bool
+
+//export CallbackNumGoroutine
+func CallbackNumGoroutine() {
+ stk, ok := checkNumGoroutine("second", 2+baseGoroutines)
+ if !ok {
+ return
+ }
+ if !strings.Contains(stk, "CallbackNumGoroutine") {
+ fmt.Printf("missing CallbackNumGoroutine from stack:\n%s\n", stk)
+ return
+ }
+
+ callbackok = true
+}