1. 编译ethereum源代码

安装g1.8版本到/opt/go，并且设置go运行环境变量，在go工作目录${HOME}/go执行：

export GOROOT=/opt/go
export PATH=$PATH:$GOROOT/bin
export GOPATH=$PWD

将go-ethereum源代码拷贝到${HOME}/go目录下，进入${HOME}/go/go-ethereum/目录下执行：

make

生成的geth可执行文件在build/bin/geth

2. 编写初始块数据

genesis.json文件内容如下：

{
    "config": {
        "chainId": 10,
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },
    "nonce":"0x0000000000000042",
    "mixhash":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "difficulty": "0x1",
    "alloc": {
    },
    "coinbase":"0x0000000000000000000000000000000000000000",
    "timestamp": "0x00",
    "parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "extraData": "GenesisBlock",
    "gasLimit":"0xffffffff"
}

3. 初始化

编写初始化脚本geth_init.sh

#!/bin/bash

BASE_PATH=$(cd `dirname $0`; pwd)

geth --datadir "$BASE_PATH/chain"  init genesis.json

#run geth in testnet
#geth --identity "ethereum-002" --rpc --rpcaddr "192.168.0.117" --rpcport "8080" --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --testnet --networkid 2288  init genesis.json

4. 启动

编写启动脚本geth_start.sh

#!/bin/bash

BASE_PATH=$(cd `dirname $0`; pwd)

#geth --datadir "$BASE_PATH/chain"  init genesis.json
geth --identity "ethereum" --rpc --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --networkid 2088 console

#run geth in testnet
#geth --identity "ethereum-002" --rpc --rpcaddr "192.168.0.117" --rpcport "8080" --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --testnet --networkid 2288  init genesis.json
#geth --identity "ethereum-002" --rpc --rpcaddr "192.168.0.178" --rpcport "8080" --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --testnet --networkid 2288  console

5. 使用源代码调试ethereum

在编译go-ethereum后，build目录下会多出一个目录_workspace,该目录下建立go语言工作环境，按照如下编写脚本启动go：

#!/bin/bash

BASE_PATH=$(cd `dirname $0`; pwd)

export GOPATH="${HOME}/go/go-ethereum-1.6.0/build/_workspace"
GETH_PATH=${GOPATH}/src/github.com/ethereum/go-ethereum/cmd/geth
GETH=${GETH_PATH}/*[^_test].go
chmod +x ${GETH}
go run ${GETH}  --datadir "$BASE_PATH/chain"  init genesis.json
go run ${GETH} --identity "ethereum" --rpc --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --networkid 2088 console

在genesis.json同级目录下执行该脚本，可达到与执行文件同样的效果。

6. 编译后使用gdb调试以太坊

在go-ethereum代码中嵌入调试断点，使用gdb启动调试，插入代码断点：

import "runtime"

runtime.Breakpoint()

gdb启动的shell脚步内容如下：

#!/bin/bash

BASE_PATH=$(cd `dirname $0`; pwd)

source /opt/go/env.sh

ETHEREUM_ROOT=${HOME}/gocode/go-ethereum-1.6.7
GETH=${ETHEREUM_ROOT}/build/bin/geth
cd ${ETHEREUM_ROOT}
make
cd ${BASE_PATH}
#gdb --args ${GETH}  --datadir "$BASE_PATH/chain"  init genesis.json
gdb --args ${GETH} --debug --identity "etherum" --rpc --rpccorsdomain "*" --datadir "$BASE_PATH/chain" --port "30303"  --rpcapi "db,eth,net,web3" --networkid 2088 console