mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-10 18:25:17 +00:00
54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
/*
|
|
* Copyright 2017 Dgraph Labs, Inc. and Contributors
|
|
* Modifications copyright (C) 2017 Andy Kimball and Contributors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package arenaskl
|
|
|
|
import (
|
|
"math"
|
|
"testing"
|
|
|
|
"github.com/cockroachdb/pebble/internal/constants"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func newArena(n uint32) *Arena {
|
|
return NewArena(make([]byte, n))
|
|
}
|
|
|
|
// TestArenaSizeOverflow tests that large allocations do not cause Arena's
|
|
// internal size accounting to overflow and produce incorrect results.
|
|
func TestArenaSizeOverflow(t *testing.T) {
|
|
a := newArena(constants.MaxUint32OrInt)
|
|
|
|
// Allocating under the limit throws no error.
|
|
offset, _, err := a.alloc(math.MaxUint16, 1, 0)
|
|
require.Nil(t, err)
|
|
require.Equal(t, uint32(1), offset)
|
|
require.Equal(t, uint32(math.MaxUint16)+1, a.Size())
|
|
|
|
// Allocating over the limit could cause an accounting
|
|
// overflow if 32-bit arithmetic was used. It shouldn't.
|
|
_, _, err = a.alloc(math.MaxUint32, 1, 0)
|
|
require.Equal(t, ErrArenaFull, err)
|
|
require.Equal(t, uint32(constants.MaxUint32OrInt), a.Size())
|
|
|
|
// Continuing to allocate continues to throw an error.
|
|
_, _, err = a.alloc(math.MaxUint16, 1, 0)
|
|
require.Equal(t, ErrArenaFull, err)
|
|
require.Equal(t, uint32(constants.MaxUint32OrInt), a.Size())
|
|
}
|