Initial commit: Go 1.23 release state

test/fixedbugs/issue19168.go

@@ -0,0 +1,58 @@
+// errorcheck -0 -l -d=wb
+
+// Copyright 2017 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.
+
+package p
+
+import (
+	"reflect"
+	"unsafe"
+
+	reflect2 "reflect"
+)
+
+func sink(e interface{})
+
+func a(hdr *reflect.SliceHeader, p *byte) {
+	hdr.Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+}
+
+func b(hdr *reflect.StringHeader, p *byte) {
+	hdr.Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+}
+
+func c(hdrs *[1]reflect.SliceHeader, p *byte) {
+	hdrs[0].Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+}
+
+func d(hdr *struct{ s reflect.StringHeader }, p *byte) {
+	hdr.s.Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+}
+
+func e(p *byte) (resHeap, resStack string) {
+	sink(&resHeap)
+
+	hdr := (*reflect.StringHeader)(unsafe.Pointer(&resHeap))
+	hdr.Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+
+	// No write barrier for non-escaping stack vars.
+	hdr = (*reflect.StringHeader)(unsafe.Pointer(&resStack))
+	hdr.Data = uintptr(unsafe.Pointer(p))
+
+	return
+}
+
+func f(hdr *reflect2.SliceHeader, p *byte) {
+	hdr.Data = uintptr(unsafe.Pointer(p)) // ERROR "write barrier"
+}
+
+type SliceHeader struct {
+	Data uintptr
+}
+
+func g(hdr *SliceHeader, p *byte) {
+	// No write barrier for lookalike SliceHeader.
+	hdr.Data = uintptr(unsafe.Pointer(p))
+}