1 files changed, 56 insertions, 0 deletions
diff --git a/src/runtime/testdata/testprogcgo/aprof.go b/src/runtime/testdata/testprogcgo/aprof.go
new file mode 100644
index 0000000..1687014
--- /dev/null
+++ b/src/runtime/testdata/testprogcgo/aprof.go
@@ -0,0 +1,56 @@
+// Copyright 2016 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 main
+
+// Test that SIGPROF received in C code does not crash the process
+// looking for the C code's func pointer.
+
+// This is a regression test for issue 14599, where profiling fails when the
+// function is the first C function. Exported functions are the first C
+// functions, so we use an exported function. Exported functions are created in
+// lexicographical order of source files, so this file is named aprof.go to
+// ensure its function is first.
+
+// extern void CallGoNop();
+import "C"
+
+import (
+	"bytes"
+	"fmt"
+	"runtime/pprof"
+	"time"
+)
+
+func init() {
+	register("CgoCCodeSIGPROF", CgoCCodeSIGPROF)
+}
+
+//export GoNop
+func GoNop() {}
+
+func CgoCCodeSIGPROF() {
+	c := make(chan bool)
+	go func() {
+		<-c
+		start := time.Now()
+		for i := 0; i < 1e7; i++ {
+			if i%1000 == 0 {
+				if time.Since(start) > time.Second {
+					break
+				}
+			}
+			C.CallGoNop()
+		}
+		c <- true
+	}()
+
+	var buf bytes.Buffer
+	pprof.StartCPUProfile(&buf)
+	c <- true
+	<-c
+	pprof.StopCPUProfile()
+
+	fmt.Println("OK")
+}