gdb调试doris_be

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Doris BE开发调试环境

工欲善其事，必先利其器

环境准备

使gdb调试时，能正确访问源码的方法

  1. 若测试环境与编译环境在同一个节点，在使用docker时映射源码路径与真实源码路径完全一致即可

例如:

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-v /data1/workspace/gaoyuanfeng/gyf-doris/doris:/data1/workspace/gaoyuanfeng/gyf-doris/doris
  1. 若测试环境与编译环境不在同一个节点，那么只需要在测环境下放置一份代码，代码所在路径要与编译环境的路径一致

检查测试环境gdb版本

要求gdb版本不低于10.2

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gdb --version

若无网环境，可手动安装gdb 14.1，以下是手动安装gdb到用户目录下的示例：

  1. 先下载并上传以下安装包到服务器用户根目录下

gmp-6.3.0
mpfr-4.2.1
gdb-14.1

  1. 执行以下操作
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cd
mkdir .gmp .mpfr .gdb
tar xvf /gmp-6.3.0.tar.xz
cd gmp-6.3.0
./configure --prefix=$HOME/.gmp
make -j64
make install
cd
tar xvfz mpfr-4.2.1.tar.gz
cd mpfr-4.2.1
./configure --prefix=$HOME/.mpfr --with-gmp=$HOME/.gmp
make -j64
make install
cd
tar xvfz gdb-14.1.tar.gz
cd gdb-14.1
./configure --prefix=$HOME/.gdb --with-gmp=$HOME/.gmp --with-mpfr=$HOME/.mpfr
make -j64
make install
cd
echo 'export PATH=$HOME/.gdb/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

可根据需求自行修改安装目录

编译debug版doris_be

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BUILD_TYPE=Debug sh build.sh

gdb调试

  1. fe.conf添加配置

目的：避免因为gdb调试中因超过心跳时间限制导致超时，进而SQL执行报错而终止

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bdbje_heartbeat_timeout_second = 600
remote_fragment_exec_timeout_ms = 600000
max_backend_heartbeat_failure_tolerance_count = 100

参数官方说明

  1. 启动doris

  2. 调试

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gdb -p {be_pid}

be pid 可使用如下两种方式获取

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cat be/bin/be.pid
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lsof -i | grep -m 1 doris_be | awk "{print $2}"

使用vscode调试

  1. 安装 C/C++ 插件，也可下载离线包进行安装cpptools

  1. 配置launch.json, 也可在工作目录下手动创建 .vscode/launch.json
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{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(gdb) Attach",
            "type": "cppdbg",
            "request": "attach",
            "program": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be/lib/doris_be",
            "processId": "${command:pickProcess}",
            "MIMode": "gdb",
            "miDebuggerPath": "/home/gaoyuanfeng/.gdb/bin/gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        },
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be/lib/doris_be",
            "args": [],
            "stopAtEntry": false,
            "cwd": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be",
            "environment": [
                {
                    "name": "DORIS_HOME",
                    "value": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be"
                },
                {
                    "name": "UDF_RUNTIME_DIR",
                    "value": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be/lib/udf-runtime"
                },
                {
                    "name": "LOG_DIR",
                    "value": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be/log"
                },
                {
                    "name": "PID_DIR",
                    "value": "/data09/workspace/gaoyuanfeng/gyf-doris/doris/output/be/bin"
                }
            ],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "/home/gaoyuanfeng/.gdb/bin/gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        }
    ]
}

根据实际情况修改gdb等路径

  1. 演示


参考资料

Doris BE开发调试环境 – vscode