summaryrefslogtreecommitdiffstats
path: root/test/abi/part_live.go
diff options
context:
space:
mode:
Diffstat (limited to 'test/abi/part_live.go')
-rw-r--r--test/abi/part_live.go48
1 files changed, 48 insertions, 0 deletions
diff --git a/test/abi/part_live.go b/test/abi/part_live.go
new file mode 100644
index 0000000..592b6b3
--- /dev/null
+++ b/test/abi/part_live.go
@@ -0,0 +1,48 @@
+// run
+
+// Copyright 2021 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.
+
+// A test for partial liveness / partial spilling / compiler-induced GC failure
+
+package main
+
+import "runtime"
+import "unsafe"
+
+//go:registerparams
+func F(s []int) {
+ for i, x := range s {
+ G(i, x)
+ }
+ GC()
+ G(len(s), cap(s))
+ GC()
+}
+
+//go:noinline
+//go:registerparams
+func G(int, int) {}
+
+//go:registerparams
+func GC() { runtime.GC(); runtime.GC() }
+
+func main() {
+ s := make([]int, 3)
+ escape(s)
+ p := int(uintptr(unsafe.Pointer(&s[2])) + 42) // likely point to unallocated memory
+ poison([3]int{p, p, p})
+ F(s)
+}
+
+//go:noinline
+//go:registerparams
+func poison([3]int) {}
+
+//go:noinline
+//go:registerparams
+func escape(s []int) {
+ g = s
+}
+var g []int