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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:19:13 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:19:13 +0000
commitccd992355df7192993c666236047820244914598 (patch)
treef00fea65147227b7743083c6148396f74cd66935 /test/fixedbugs/issue8004.go
parentInitial commit. (diff)
downloadgolang-1.21-ccd992355df7192993c666236047820244914598.tar.xz
golang-1.21-ccd992355df7192993c666236047820244914598.zip
Adding upstream version 1.21.8.upstream/1.21.8
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/fixedbugs/issue8004.go')
-rw-r--r--test/fixedbugs/issue8004.go59
1 files changed, 59 insertions, 0 deletions
diff --git a/test/fixedbugs/issue8004.go b/test/fixedbugs/issue8004.go
new file mode 100644
index 0000000..548ee1c
--- /dev/null
+++ b/test/fixedbugs/issue8004.go
@@ -0,0 +1,59 @@
+// run
+
+// Copyright 2014 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 main
+
+import (
+ "reflect"
+ "runtime"
+ "unsafe"
+)
+
+func main() {
+ test1()
+ test2()
+}
+
+func test1() {
+ var all []interface{}
+ for i := 0; i < 100; i++ {
+ p := new([]int)
+ *p = append(*p, 1, 2, 3, 4)
+ h := (*reflect.SliceHeader)(unsafe.Pointer(p))
+ all = append(all, h, p)
+ }
+ runtime.GC()
+ for i := 0; i < 100; i++ {
+ p := *all[2*i+1].(*[]int)
+ if p[0] != 1 || p[1] != 2 || p[2] != 3 || p[3] != 4 {
+ println("BUG test1: bad slice at index", i, p[0], p[1], p[2], p[3])
+ return
+ }
+ }
+}
+
+type T struct {
+ H *reflect.SliceHeader
+ P *[]int
+}
+
+func test2() {
+ var all []T
+ for i := 0; i < 100; i++ {
+ p := new([]int)
+ *p = append(*p, 1, 2, 3, 4)
+ h := (*reflect.SliceHeader)(unsafe.Pointer(p))
+ all = append(all, T{H: h}, T{P: p})
+ }
+ runtime.GC()
+ for i := 0; i < 100; i++ {
+ p := *all[2*i+1].P
+ if p[0] != 1 || p[1] != 2 || p[2] != 3 || p[3] != 4 {
+ println("BUG test2: bad slice at index", i, p[0], p[1], p[2], p[3])
+ return
+ }
+ }
+}