Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/test/fixedbugs/issue16948.go b/test/fixedbugs/issue16948.go
new file mode 100644
index 0000000..c986024
--- /dev/null
+++ b/test/fixedbugs/issue16948.go
@@ -0,0 +1,34 @@
+// run
+
+// 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.
+
+// issue 16948: make sure intrinsified atomic ops won't
+// confuse the scheduler.
+
+package main
+
+import "sync/atomic"
+
+func main() {
+	f()
+}
+
+var x int32
+
+type T [10]int
+var sink *T
+
+func f() (t T) {
+	atomic.AddInt32(&x, 1)
+	g(42, 42, 42, 42, 42, &t) // use int values that is invalid pointer to smash the stack slot of return value of runtime.newobject
+	return
+}
+
+//go:noinline
+func g(a, b, c, d, e int, p *T) {
+	var t [10000]int // a large stack frame to trigger stack growing
+	_ = t
+	sink = p // force p (in caller) heap allocated
+}