1 files changed, 79 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/sysvshm_unix_test.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/sysvshm_unix_test.go
new file mode 100644
index 0000000..c1eff8d
--- /dev/null
+++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/sysvshm_unix_test.go
@@ -0,0 +1,79 @@
+// 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.
+
+//go:build (darwin && amd64) || linux
+// +build darwin,amd64 linux
+
+package unix_test
+
+import (
+	"runtime"
+	"testing"
+
+	"golang.org/x/sys/unix"
+)
+
+func TestSysvSharedMemory(t *testing.T) {
+	// create ipc
+	id, err := unix.SysvShmGet(unix.IPC_PRIVATE, 1024, unix.IPC_CREAT|unix.IPC_EXCL|0o600)
+
+	// ipc isn't implemented on android, should fail
+	if runtime.GOOS == "android" {
+		if err != unix.ENOSYS {
+			t.Fatalf("expected android to fail, but it didn't")
+		}
+		return
+	}
+
+	// The kernel may have been built without System V IPC support.
+	if err == unix.ENOSYS {
+		t.Skip("shmget not supported")
+	}
+
+	if err != nil {
+		t.Fatalf("SysvShmGet: %v", err)
+	}
+	defer func() {
+		_, err := unix.SysvShmCtl(id, unix.IPC_RMID, nil)
+		if err != nil {
+			t.Errorf("Remove failed: %v", err)
+		}
+	}()
+
+	// attach
+	b1, err := unix.SysvShmAttach(id, 0, 0)
+	if err != nil {
+		t.Fatalf("Attach: %v", err)
+	}
+
+	if len(b1) != 1024 {
+		t.Fatalf("b1 len = %v, want 1024", len(b1))
+	}
+
+	b1[42] = 'x'
+
+	// attach again
+	b2, err := unix.SysvShmAttach(id, 0, 0)
+	if err != nil {
+		t.Fatalf("Attach: %v", err)
+	}
+
+	if len(b2) != 1024 {
+		t.Fatalf("b2 len = %v, want 1024", len(b1))
+	}
+
+	b2[43] = 'y'
+	if b2[42] != 'x' || b1[43] != 'y' {
+		t.Fatalf("shared memory isn't shared")
+	}
+
+	// detach
+	if err = unix.SysvShmDetach(b2); err != nil {
+		t.Fatalf("Detach: %v", err)
+	}
+
+	if b1[42] != 'x' || b1[43] != 'y' {
+		t.Fatalf("shared memory was invalidated")
+	}
+}