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-rw-r--r--test/fixedbugs/issue24491b.go46
1 files changed, 46 insertions, 0 deletions
diff --git a/test/fixedbugs/issue24491b.go b/test/fixedbugs/issue24491b.go
new file mode 100644
index 0000000..142d798
--- /dev/null
+++ b/test/fixedbugs/issue24491b.go
@@ -0,0 +1,46 @@
+// run
+
+// Copyright 2020 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.
+
+// This test makes sure unsafe-uintptr arguments are not
+// kept alive longer than expected.
+
+package main
+
+import (
+ "runtime"
+ "unsafe"
+)
+
+var done = make(chan bool)
+
+func setup() unsafe.Pointer {
+ s := "ok"
+ runtime.SetFinalizer(&s, func(p *string) { close(done) })
+ return unsafe.Pointer(&s)
+}
+
+//go:noinline
+//go:uintptrescapes
+func before(p uintptr) int {
+ runtime.GC()
+ select {
+ case <-done:
+ panic("GC early")
+ default:
+ }
+ return 0
+}
+
+func after() int {
+ runtime.GC()
+ runtime.GC()
+ <-done
+ return 0
+}
+
+func main() {
+ _ = before(uintptr(setup())) + after()
+}