Adding upstream version 1.21.8.upstream/1.21.8

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

1 files changed, 44 insertions, 0 deletions

diff --git a/src/runtime/testdata/testprog/framepointer.go b/src/runtime/testdata/testprog/framepointer.go
new file mode 100644
index 0000000..cee6f7d
--- /dev/null
+++ b/src/runtime/testdata/testprog/framepointer.go
@@ -0,0 +1,44 @@
+// Copyright 2023 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 amd64 || arm64
+
+package main
+
+import "unsafe"
+
+func init() {
+	register("FramePointerAdjust", FramePointerAdjust)
+}
+
+func FramePointerAdjust() { framePointerAdjust1(0) }
+
+//go:noinline
+func framePointerAdjust1(x int) {
+	argp := uintptr(unsafe.Pointer(&x))
+	fp := *getFP()
+	if !(argp-0x100 <= fp && fp <= argp+0x100) {
+		print("saved FP=", fp, " &x=", argp, "\n")
+		panic("FAIL")
+	}
+
+	// grow the stack
+	grow(10000)
+
+	// check again
+	argp = uintptr(unsafe.Pointer(&x))
+	fp = *getFP()
+	if !(argp-0x100 <= fp && fp <= argp+0x100) {
+		print("saved FP=", fp, " &x=", argp, "\n")
+		panic("FAIL")
+	}
+}
+
+func grow(n int) {
+	if n > 0 {
+		grow(n - 1)
+	}
+}
+
+func getFP() *uintptr