ceremonyclient/pebble/internal/arenaskl/race_test.go
Cassandra Heart 2e2a1e4789
v1.2.0 (#31)
2024-01-03 01:31:42 -06:00

43 lines
1.3 KiB
Go

//go:build race
// +build race
// Copyright 2020 The LevelDB-Go and Pebble 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 arenaskl
import (
"testing"
"github.com/stretchr/testify/require"
)
// TestNodeArenaEnd tests allocating a node at the boundary of an arena. In Go
// 1.14 when the race detector is running, Go will also perform some pointer
// alignment checks. It will detect alignment issues, for example #667 where a
// node's memory would straddle the arena boundary, with unused regions of the
// node struct dipping into unallocated memory. This test is only run when the
// race build tag is provided.
func TestNodeArenaEnd(t *testing.T) {
ikey := makeIkey("a")
val := []byte("b")
// Rather than hardcode an arena size at just the right size, try
// allocating using successively larger arena sizes until we allocate
// successfully. The prior attempt will have exercised the right code
// path.
for i := uint32(1); i < 256; i++ {
a := newArena(i)
_, err := newNode(a, 1, ikey, val)
if err == nil {
// We reached an arena size big enough to allocate a node.
// If there's an issue at the boundary, the race detector would
// have found it by now.
t.Log(i)
break
}
require.Equal(t, ErrArenaFull, err)
}
}