github.hscsec.cn/juliankolbe/go-ethereum@v1.9.7/core/vm/runtime/fuzz.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // +build gofuzz
    18  
    19  package runtime
    20  
    21  // Fuzz is the basic entry point for the go-fuzz tool
    22  //
    23  // This returns 1 for valid parsable/runable code, 0
    24  // for invalid opcode.
    25  func Fuzz(input []byte) int {
    26  	_, _, err := Execute(input, input, &Config{
    27  		GasLimit: 3000000,
    28  	})
    29  
    30  	// invalid opcode
    31  	if err != nil && len(err.Error()) > 6 && string(err.Error()[:7]) == "invalid" {
    32  		return 0
    33  	}
    34  
    35  	return 1
    36  }