add stack test

R=r
DELTA=48  (48 added, 0 deleted, 0 changed)
OCL=23715
CL=23732

diff --git a/test/stack.go b/test/stack.go
new file mode 100644 (file)
index 0000000..9fecc91
--- /dev/null
+++ b/test/stack.go
@@ -0,0 +1,52 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 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.
+
+// Try to tickle stack splitting bugs by doing
+// go and defer at different stack depths.
+
+package main
+
+type T [20] int;
+
+func g(c chan int, t T) {
+       s := 0;
+       for i := 0; i < len(t); i++ {
+               s += t[i];
+       }
+       c <- s;
+}
+
+func d(t T) {
+       s := 0;
+       for i := 0; i < len(t); i++ {
+               s += t[i];
+       }
+       if s != len(t) {
+               panicln("bad defer", s);
+       }
+}
+
+var c = make(chan int);
+var t T;
+
+func recur(n int) {
+       go g(c, t);
+       s := <-c;
+       if s != len(t) {
+               panicln("bad go", s);
+       }
+       if n > 0 {
+               recur(n-1);
+       }
+       defer d(t);
+}
+
+func main() {
+       for i := 0; i < len(t); i++ {
+               t[i] = 1;
+       }
+       recur(10000);
+}