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-rw-r--r--src/runtime/testdata/testprogcgo/aprof.go56
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
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+++ b/src/runtime/testdata/testprogcgo/aprof.go
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+// 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")
+}