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analysis_test.go
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analysis_test.go
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// Copyright 2017 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 (
"math/bits"
"testing"
"github.com/ethereum/go-ethereum/crypto"
)
func TestJumpDestAnalysis(t *testing.T) {
tests := []struct {
code []byte
exp byte
which int
}{
{[]byte{byte(PUSH1), 0x01, 0x01, 0x01}, 0b0000_0010, 0},
{[]byte{byte(PUSH1), byte(PUSH1), byte(PUSH1), byte(PUSH1)}, 0b0000_1010, 0},
{[]byte{0x00, byte(PUSH1), 0x00, byte(PUSH1), 0x00, byte(PUSH1), 0x00, byte(PUSH1)}, 0b0101_0100, 0},
{[]byte{byte(PUSH8), byte(PUSH8), byte(PUSH8), byte(PUSH8), byte(PUSH8), byte(PUSH8), byte(PUSH8), byte(PUSH8), 0x01, 0x01, 0x01}, bits.Reverse8(0x7F), 0},
{[]byte{byte(PUSH8), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0000_0001, 1},
{[]byte{0x01, 0x01, 0x01, 0x01, 0x01, byte(PUSH2), byte(PUSH2), byte(PUSH2), 0x01, 0x01, 0x01}, 0b1100_0000, 0},
{[]byte{0x01, 0x01, 0x01, 0x01, 0x01, byte(PUSH2), 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0000_0000, 1},
{[]byte{byte(PUSH3), 0x01, 0x01, 0x01, byte(PUSH1), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0010_1110, 0},
{[]byte{byte(PUSH3), 0x01, 0x01, 0x01, byte(PUSH1), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0000_0000, 1},
{[]byte{0x01, byte(PUSH8), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b1111_1100, 0},
{[]byte{0x01, byte(PUSH8), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0000_0011, 1},
{[]byte{byte(PUSH16), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b1111_1110, 0},
{[]byte{byte(PUSH16), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b1111_1111, 1},
{[]byte{byte(PUSH16), 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 0b0000_0001, 2},
{[]byte{byte(PUSH8), 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, byte(PUSH1), 0x01}, 0b1111_1110, 0},
{[]byte{byte(PUSH8), 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, byte(PUSH1), 0x01}, 0b0000_0101, 1},
{[]byte{byte(PUSH32)}, 0b1111_1110, 0},
{[]byte{byte(PUSH32)}, 0b1111_1111, 1},
{[]byte{byte(PUSH32)}, 0b1111_1111, 2},
{[]byte{byte(PUSH32)}, 0b1111_1111, 3},
{[]byte{byte(PUSH32)}, 0b0000_0001, 4},
}
for i, test := range tests {
ret := codeBitmap(test.code)
if ret[test.which] != test.exp {
t.Fatalf("test %d: expected %x, got %02x", i, test.exp, ret[test.which])
}
}
}
const analysisCodeSize = 1200 * 1024
func BenchmarkJumpdestAnalysis_1200k(bench *testing.B) {
// 1.4 ms
code := make([]byte, analysisCodeSize)
bench.SetBytes(analysisCodeSize)
bench.ResetTimer()
for i := 0; i < bench.N; i++ {
codeBitmap(code)
}
bench.StopTimer()
}
func BenchmarkJumpdestHashing_1200k(bench *testing.B) {
// 4 ms
code := make([]byte, analysisCodeSize)
bench.SetBytes(analysisCodeSize)
bench.ResetTimer()
for i := 0; i < bench.N; i++ {
crypto.Keccak256Hash(code)
}
bench.StopTimer()
}
func BenchmarkJumpdestOpAnalysis(bench *testing.B) {
var op OpCode
bencher := func(b *testing.B) {
code := make([]byte, analysisCodeSize)
b.SetBytes(analysisCodeSize)
for i := range code {
code[i] = byte(op)
}
bits := make(bitvec, len(code)/8+1+4)
b.ResetTimer()
for i := 0; i < b.N; i++ {
for j := range bits {
bits[j] = 0
}
codeBitmapInternal(code, bits)
}
}
for op = PUSH1; op <= PUSH32; op++ {
bench.Run(op.String(), bencher)
}
op = JUMPDEST
bench.Run(op.String(), bencher)
op = STOP
bench.Run(op.String(), bencher)
}