Retro68/gcc/libgo/go/runtime/runtime_mmap_test.go
2017-04-10 13:32:00 +02:00

31 lines
883 B
Go

// Copyright 2016 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.
// +build ignore
package runtime_test
import (
"runtime"
"runtime/internal/sys"
"testing"
)
// Test that the error value returned by mmap is positive, as that is
// what the code in mem_bsd.go, mem_darwin.go, and mem_linux.go expects.
// See the uses of ENOMEM in sysMap in those files.
func TestMmapErrorSign(t *testing.T) {
p := runtime.Mmap(nil, ^uintptr(0)&^(sys.PhysPageSize-1), 0, runtime.MAP_ANON|runtime.MAP_PRIVATE, -1, 0)
// The runtime.mmap function is nosplit, but t.Errorf is not.
// Reset the pointer so that we don't get an "invalid stack
// pointer" error from t.Errorf if we call it.
v := uintptr(p)
p = nil
if v != runtime.ENOMEM {
t.Errorf("mmap = %v, want %v", v, runtime.ENOMEM)
}
}