github.com/jeffallen/go-ethereum@v1.1.4-0.20150910155051-571d3236c49c/core/vm/logger.go (about)

     1  // Copyright 2015 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  package vm
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"unicode"
    23  
    24  	"github.com/ethereum/go-ethereum/common"
    25  )
    26  
    27  func StdErrFormat(logs []StructLog) {
    28  	fmt.Fprintf(os.Stderr, "VM STAT %d OPs\n", len(logs))
    29  	for _, log := range logs {
    30  		fmt.Fprintf(os.Stderr, "PC %08d: %s GAS: %v COST: %v", log.Pc, log.Op, log.Gas, log.GasCost)
    31  		if log.Err != nil {
    32  			fmt.Fprintf(os.Stderr, " ERROR: %v", log.Err)
    33  		}
    34  		fmt.Fprintf(os.Stderr, "\n")
    35  
    36  		fmt.Fprintln(os.Stderr, "STACK =", len(log.Stack))
    37  
    38  		for i := len(log.Stack) - 1; i >= 0; i-- {
    39  			fmt.Fprintf(os.Stderr, "%04d: %x\n", len(log.Stack)-i-1, common.LeftPadBytes(log.Stack[i].Bytes(), 32))
    40  		}
    41  
    42  		const maxMem = 10
    43  		addr := 0
    44  		fmt.Fprintln(os.Stderr, "MEM =", len(log.Memory))
    45  		for i := 0; i+16 <= len(log.Memory) && addr < maxMem; i += 16 {
    46  			data := log.Memory[i : i+16]
    47  			str := fmt.Sprintf("%04d: % x  ", addr*16, data)
    48  			for _, r := range data {
    49  				if r == 0 {
    50  					str += "."
    51  				} else if unicode.IsPrint(rune(r)) {
    52  					str += fmt.Sprintf("%s", string(r))
    53  				} else {
    54  					str += "?"
    55  				}
    56  			}
    57  			addr++
    58  			fmt.Fprintln(os.Stderr, str)
    59  		}
    60  
    61  		fmt.Fprintln(os.Stderr, "STORAGE =", len(log.Storage))
    62  		for h, item := range log.Storage {
    63  			fmt.Fprintf(os.Stderr, "%x: %x\n", h, common.LeftPadBytes(item, 32))
    64  		}
    65  		fmt.Fprintln(os.Stderr)
    66  	}
    67  }