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Diffstat (limited to 'test/abi/part_live.go')
-rw-r--r-- | test/abi/part_live.go | 48 |
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 |