36 lines
1.3 KiB
Go
36 lines
1.3 KiB
Go
|
// Copyright 2022 The go-ethereum Authors
|
||
|
|
// This file is part of the go-ethereum library.
|
||
|
|
//
|
||
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
// the Free Software Foundation, either version 3 of the License, or
|
||
|
|
// (at your option) any later version.
|
||
|
|
//
|
||
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
// GNU Lesser General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU Lesser General Public License
|
||
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
package vm
|
||
|
|
|
||
|
|
import (
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
"github.com/stretchr/testify/require"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TestJumpTableCopy tests that deep copy is necessery to prevent modify shared jump table
|
||
|
|
func TestJumpTableCopy(t *testing.T) {
|
||
|
|
tbl := newMergeInstructionSet()
|
||
|
|
require.Equal(t, uint64(0), tbl[SLOAD].constantGas)
|
||
|
|
|
||
|
|
// a deep copy won't modify the shared jump table
|
||
|
|
deepCopy := copyJumpTable(&tbl)
|
||
|
|
deepCopy[SLOAD].constantGas = 100
|
||
|
|
require.Equal(t, uint64(100), deepCopy[SLOAD].constantGas)
|
||
|
|
require.Equal(t, uint64(0), tbl[SLOAD].constantGas)
|
||
|
|
}
|