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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:16:40 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:16:40 +0000
commit47ab3d4a42e9ab51c465c4322d2ec233f6324e6b (patch)
treea61a0ffd83f4a3def4b36e5c8e99630c559aa723 /test/abi/part_live_2.go
parentInitial commit. (diff)
downloadgolang-1.18-upstream.tar.xz
golang-1.18-upstream.zip
Adding upstream version 1.18.10.upstream/1.18.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/abi/part_live_2.go')
-rw-r--r--test/abi/part_live_2.go53
1 files changed, 53 insertions, 0 deletions
diff --git a/test/abi/part_live_2.go b/test/abi/part_live_2.go
new file mode 100644
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+++ b/test/abi/part_live_2.go
@@ -0,0 +1,53 @@
+// 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()
+ H(&s[0]) // It's possible that this will make the spill redundant, but there's a bug in spill slot allocation.
+ G(len(s), cap(s))
+ GC()
+}
+
+//go:noinline
+//go:registerparams
+func G(int, int) {}
+
+//go:noinline
+//go:registerparams
+func H(*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