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517 lines
14 KiB
517 lines
14 KiB
// Copyright 2024 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"encoding/binary"
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"errors"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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)
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func TestValidateCode(t *testing.T) {
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for i, test := range []struct {
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code []byte
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section int
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metadata []*functionMetadata
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err error
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}{
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{
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code: []byte{
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byte(CALLER),
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byte(POP),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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},
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{
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code: []byte{
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byte(CALLF), 0x00, 0x00,
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byte(RETF),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0, maxStackHeight: 0}},
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},
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{
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code: []byte{
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byte(ADDRESS),
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byte(CALLF), 0x00, 0x00,
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byte(POP),
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byte(RETF),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0, maxStackHeight: 1}},
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},
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{
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code: []byte{
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byte(CALLER),
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byte(POP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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err: errInvalidCodeTermination,
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},
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{
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code: []byte{
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byte(RJUMP),
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byte(0x00),
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byte(0x01),
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byte(CALLER),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 0}},
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err: errUnreachableCode,
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},
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{
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code: []byte{
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byte(PUSH1),
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byte(0x42),
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byte(ADD),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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err: ErrStackUnderflow{stackLen: 1, required: 2},
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},
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{
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code: []byte{
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byte(PUSH1),
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byte(0x42),
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byte(POP),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 2}},
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err: errInvalidMaxStackHeight,
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},
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{
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code: []byte{
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byte(PUSH0),
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byte(RJUMPI),
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byte(0x00),
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byte(0x01),
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byte(PUSH1),
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byte(0x42), // jumps to here
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byte(POP),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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err: errInvalidJumpDest,
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},
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{
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code: []byte{
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byte(PUSH0),
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byte(RJUMPV),
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byte(0x01),
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byte(0x00),
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byte(0x01),
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byte(0x00),
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byte(0x02),
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byte(PUSH1),
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byte(0x42), // jumps to here
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byte(POP), // and here
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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err: errInvalidJumpDest,
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},
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{
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code: []byte{
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byte(PUSH0),
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byte(RJUMPV),
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byte(0x00),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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err: errTruncatedImmediate,
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},
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{
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code: []byte{
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byte(RJUMP), 0x00, 0x03,
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byte(JUMPDEST), // this code is unreachable to forward jumps alone
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byte(JUMPDEST),
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byte(RETURN),
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byte(PUSH1), 20,
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byte(PUSH1), 39,
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byte(PUSH1), 0x00,
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byte(DATACOPY),
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byte(PUSH1), 20,
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byte(PUSH1), 0x00,
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byte(RJUMP), 0xff, 0xef,
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 3}},
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err: errUnreachableCode,
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},
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{
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code: []byte{
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byte(PUSH1), 1,
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byte(RJUMPI), 0x00, 0x03,
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byte(JUMPDEST),
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byte(JUMPDEST),
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byte(STOP),
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byte(PUSH1), 20,
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byte(PUSH1), 39,
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byte(PUSH1), 0x00,
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byte(DATACOPY),
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byte(PUSH1), 20,
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byte(PUSH1), 0x00,
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byte(RETURN),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 3}},
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},
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{
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code: []byte{
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byte(PUSH1), 1,
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byte(RJUMPV), 0x01, 0x00, 0x03, 0xff, 0xf8,
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byte(JUMPDEST),
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byte(JUMPDEST),
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byte(STOP),
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byte(PUSH1), 20,
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byte(PUSH1), 39,
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byte(PUSH1), 0x00,
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byte(DATACOPY),
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byte(PUSH1), 20,
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byte(PUSH1), 0x00,
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byte(RETURN),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 3}},
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},
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{
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code: []byte{
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byte(STOP),
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byte(STOP),
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byte(INVALID),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 0}},
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err: errUnreachableCode,
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},
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{
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code: []byte{
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byte(RETF),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 1, maxStackHeight: 0}},
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err: errInvalidOutputs,
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},
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{
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code: []byte{
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byte(RETF),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 3, outputs: 3, maxStackHeight: 3}},
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},
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{
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code: []byte{
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byte(CALLF), 0x00, 0x01,
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byte(POP),
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byte(STOP),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}, {inputs: 0, outputs: 1, maxStackHeight: 0}},
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},
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{
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code: []byte{
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byte(ORIGIN),
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byte(ORIGIN),
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byte(CALLF), 0x00, 0x01,
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byte(POP),
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byte(RETF),
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},
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section: 0,
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metadata: []*functionMetadata{{inputs: 0, outputs: 0, maxStackHeight: 2}, {inputs: 2, outputs: 1, maxStackHeight: 2}},
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},
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} {
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container := &Container{
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types: test.metadata,
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data: make([]byte, 0),
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subContainers: make([]*Container, 0),
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}
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_, err := validateCode(test.code, test.section, container, &pragueEOFInstructionSet, false)
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if !errors.Is(err, test.err) {
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t.Errorf("test %d (%s): unexpected error (want: %v, got: %v)", i, common.Bytes2Hex(test.code), test.err, err)
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}
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}
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}
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// BenchmarkRJUMPI tries to benchmark the RJUMPI opcode validation
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// For this we do a bunch of RJUMPIs that jump backwards (in a potential infinite loop).
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func BenchmarkRJUMPI(b *testing.B) {
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snippet := []byte{
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byte(PUSH0),
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byte(RJUMPI), 0xFF, 0xFC,
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}
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code := []byte{}
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for i := 0; i < params.MaxCodeSize/len(snippet)-1; i++ {
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code = append(code, snippet...)
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}
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code = append(code, byte(STOP))
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container := &Container{
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types: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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data: make([]byte, 0),
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subContainers: make([]*Container, 0),
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := validateCode(code, 0, container, &pragueEOFInstructionSet, false)
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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// BenchmarkRJUMPV tries to benchmark the validation of the RJUMPV opcode
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// for this we set up as many RJUMPV opcodes with a full jumptable (containing 0s) as possible.
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func BenchmarkRJUMPV(b *testing.B) {
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snippet := []byte{
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byte(PUSH0),
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byte(RJUMPV),
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0xff, // count
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0x00, 0x00,
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}
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for i := 0; i < 255; i++ {
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snippet = append(snippet, []byte{0x00, 0x00}...)
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}
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code := []byte{}
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for i := 0; i < 24576/len(snippet)-1; i++ {
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code = append(code, snippet...)
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}
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code = append(code, byte(PUSH0))
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code = append(code, byte(STOP))
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container := &Container{
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types: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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data: make([]byte, 0),
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subContainers: make([]*Container, 0),
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := validateCode(code, 0, container, &pragueEOFInstructionSet, false)
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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// BenchmarkEOFValidation tries to benchmark the code validation for the CALLF/RETF operation.
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// For this we set up code that calls into 1024 code sections which can either
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// - just contain a RETF opcode
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// - or code to again call into 1024 code sections.
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// We can't have all code sections calling each other, otherwise we would exceed 48KB.
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func BenchmarkEOFValidation(b *testing.B) {
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var container Container
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var code []byte
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maxSections := 1024
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for i := 0; i < maxSections; i++ {
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code = append(code, byte(CALLF))
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code = binary.BigEndian.AppendUint16(code, uint16(i%(maxSections-1))+1)
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}
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// First container
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container.codeSections = append(container.codeSections, append(code, byte(STOP)))
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0x80, maxStackHeight: 0})
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inner := []byte{
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byte(RETF),
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}
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for i := 0; i < 1023; i++ {
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container.codeSections = append(container.codeSections, inner)
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0, maxStackHeight: 0})
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}
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for i := 0; i < 12; i++ {
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container.codeSections[i+1] = append(code, byte(RETF))
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}
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bin := container.MarshalBinary()
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if len(bin) > 48*1024 {
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b.Fatal("Exceeds 48Kb")
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}
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var container2 Container
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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if err := container2.UnmarshalBinary(bin, true); err != nil {
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b.Fatal(err)
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}
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if err := container2.ValidateCode(&pragueEOFInstructionSet, false); err != nil {
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b.Fatal(err)
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}
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}
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}
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// BenchmarkEOFValidation tries to benchmark the code validation for the CALLF/RETF operation.
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// For this we set up code that calls into 1024 code sections which
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// - contain calls to some other code sections.
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// We can't have all code sections calling each other, otherwise we would exceed 48KB.
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func BenchmarkEOFValidation2(b *testing.B) {
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var container Container
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var code []byte
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maxSections := 1024
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for i := 0; i < maxSections; i++ {
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code = append(code, byte(CALLF))
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code = binary.BigEndian.AppendUint16(code, uint16(i%(maxSections-1))+1)
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}
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code = append(code, byte(STOP))
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// First container
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container.codeSections = append(container.codeSections, code)
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0x80, maxStackHeight: 0})
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inner := []byte{
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byte(CALLF), 0x03, 0xE8,
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byte(CALLF), 0x03, 0xE9,
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byte(CALLF), 0x03, 0xF0,
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byte(CALLF), 0x03, 0xF1,
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byte(CALLF), 0x03, 0xF2,
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byte(CALLF), 0x03, 0xF3,
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byte(CALLF), 0x03, 0xF4,
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byte(CALLF), 0x03, 0xF5,
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byte(CALLF), 0x03, 0xF6,
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byte(CALLF), 0x03, 0xF7,
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byte(CALLF), 0x03, 0xF8,
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byte(CALLF), 0x03, 0xF,
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byte(RETF),
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}
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for i := 0; i < 1023; i++ {
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container.codeSections = append(container.codeSections, inner)
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0, maxStackHeight: 0})
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}
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bin := container.MarshalBinary()
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if len(bin) > 48*1024 {
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b.Fatal("Exceeds 48Kb")
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}
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var container2 Container
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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if err := container2.UnmarshalBinary(bin, true); err != nil {
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b.Fatal(err)
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}
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if err := container2.ValidateCode(&pragueEOFInstructionSet, false); err != nil {
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b.Fatal(err)
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}
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}
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}
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// BenchmarkEOFValidation3 tries to benchmark the code validation for the CALLF/RETF and RJUMPI/V operations.
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// For this we set up code that calls into 1024 code sections which either
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// - contain an RJUMP opcode
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// - contain calls to other code sections
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// We can't have all code sections calling each other, otherwise we would exceed 48KB.
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func BenchmarkEOFValidation3(b *testing.B) {
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var container Container
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var code []byte
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snippet := []byte{
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byte(PUSH0),
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byte(RJUMPV),
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0xff, // count
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0x00, 0x00,
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}
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for i := 0; i < 255; i++ {
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snippet = append(snippet, []byte{0x00, 0x00}...)
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}
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code = append(code, snippet...)
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// First container, calls into all other containers
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maxSections := 1024
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for i := 0; i < maxSections; i++ {
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code = append(code, byte(CALLF))
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code = binary.BigEndian.AppendUint16(code, uint16(i%(maxSections-1))+1)
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}
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code = append(code, byte(STOP))
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container.codeSections = append(container.codeSections, code)
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0x80, maxStackHeight: 1})
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// Other containers
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for i := 0; i < 1023; i++ {
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container.codeSections = append(container.codeSections, []byte{byte(RJUMP), 0x00, 0x00, byte(RETF)})
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container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0, maxStackHeight: 0})
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}
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// Other containers
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for i := 0; i < 68; i++ {
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container.codeSections[i+1] = append(snippet, byte(RETF))
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container.types[i+1] = &functionMetadata{inputs: 0, outputs: 0, maxStackHeight: 1}
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}
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bin := container.MarshalBinary()
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if len(bin) > 48*1024 {
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b.Fatal("Exceeds 48Kb")
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}
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b.ResetTimer()
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b.ReportMetric(float64(len(bin)), "bytes")
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for i := 0; i < b.N; i++ {
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for k := 0; k < 40; k++ {
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var container2 Container
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if err := container2.UnmarshalBinary(bin, true); err != nil {
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b.Fatal(err)
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}
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if err := container2.ValidateCode(&pragueEOFInstructionSet, false); err != nil {
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b.Fatal(err)
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}
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}
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}
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}
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func BenchmarkRJUMPI_2(b *testing.B) {
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code := []byte{
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byte(PUSH0),
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byte(RJUMPI), 0xFF, 0xFC,
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}
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for i := 0; i < params.MaxCodeSize/4-1; i++ {
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code = append(code, byte(PUSH0))
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x := -4 * i
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code = append(code, byte(RJUMPI))
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code = binary.BigEndian.AppendUint16(code, uint16(x))
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}
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code = append(code, byte(STOP))
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container := &Container{
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types: []*functionMetadata{{inputs: 0, outputs: 0x80, maxStackHeight: 1}},
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data: make([]byte, 0),
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subContainers: make([]*Container, 0),
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := validateCode(code, 0, container, &pragueEOFInstructionSet, false)
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if err != nil {
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b.Fatal(err)
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}
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}
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}
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func FuzzUnmarshalBinary(f *testing.F) {
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f.Fuzz(func(_ *testing.T, input []byte) {
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var container Container
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container.UnmarshalBinary(input, true)
|
|
})
|
|
}
|
|
|
|
func FuzzValidate(f *testing.F) {
|
|
f.Fuzz(func(_ *testing.T, code []byte, maxStack uint16) {
|
|
var container Container
|
|
container.types = append(container.types, &functionMetadata{inputs: 0, outputs: 0x80, maxStackHeight: maxStack})
|
|
validateCode(code, 0, &container, &pragueEOFInstructionSet, true)
|
|
})
|
|
}
|
|
|