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+title = "使用clion远程调试openGauss"
+date = "2024-08-01"
+tags = ["远程调试"]
+archives = "202408"
+author = "justbk"
+summary = "利用clion远程调试功能，实现openGauss进程可视化调试，提升代码效率."
+img="/zh/post/justbk/title/perfermance_openGauss_logo.png"
+times = "12:30"
+
++++
+
+# 使用clion远程调试openGauss
+
+## 一、前言
+
+openGauss数据库默认在linux系的操作系统上编译和运行，要想可视化调试运行，要么换linux系的桌面系统、要么在命令行使用gdb进行调试。而我习惯使用windows办公，所以非常想通过clion远程调试功能来实现在windows上的openGauss开发与调试。对比gdb，可以在调试的时候直接查看或者跳转函数/变量定义，提升代码效率。
+
+## 二、环境准备
+
+本次利用clion的cmake和deployment功能实现远程调试，相关配置及规划如下：
+
+1.可以正常编译openGauss的linux服务器一台(openEuler 20.03 LTS(aarch64))，已安装相关的依赖，参考openGauss源码编译:[链接](https://gitee.com/opengauss/openGauss-server#%E7%BC%96%E8%AF%91),磁盘空间充足。
+
+2.windows机器一台，已安装clion（版本:2024.1.4），可以通过ssh远程到linux服务器。(clion 2020版本无法关联代码，请避雷)
+
+## 三、下载openGauss编译用源代码
+
+### 1. windows端
+
+a.下载代码前勿必先执行`git config --global core.autocrlf false` ,禁止crlf的自动转换。
+
+**注意**:这个配置默认是true，请使用空目录下载。
+
+b.下载openGauss-server源代码`git clone https://gitee.com/opengauss/openGauss-server.git`
+
+本次假定代码下载到`E:\code\gitee\openGauss-server`目录
+
+### 2. linux端
+
+可以通过clion配置Deployment功能自动上传，不过为了方便代码修改追踪，仍然建议直接使用git下载代码。
+
+另外三方库也需要下载,本次使用7.3版本，本次假定路径:`/home/zhoubin/work/binarylibs`
+
+本次假定代码下载到`/home/zhoubin/work/remote_debug/code`
+
+## 四、配置Linux端的cmake编译环境
+
+直接在linux下的~/.bashrc文件下补充以下配置:
+
+```shell
+MY_HOME=/home/zhoubin/work
+export DEBUG_TYPE=debug
+export ARCH=aarch64
+export GCC_VERSION=7.3.0
+
+export THIRD_BIN_PATH=$MY_HOME/binarylibs
+export JAVA_HOME=$THIRD_BIN_PATH/openjdk8/${ARCH}/jdk/
+export PATH=$PATH:${JAVA_HOME}/bin
+export APPEND_FLAGS="-g3 -w -fPIC"
+export GCCFOLDER=$THIRD_BIN_PATH/buildtools/gcc7.3
+export CC=$GCCFOLDER/gcc/bin/gcc
+export CXX=$GCCFOLDER/gcc/bin/g++
+export LD_LIBRARY_PATH=$GCCFOLDER/gcc/lib64:$GCCFOLDER/isl/lib:$GCCFOLDER/mpc/lib/:$GCCFOLDER/mpfr/lib/:$GCCFOLDER/gmp/lib/:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH=$THIRD_BIN_PATH/dependency/kerberos/comm/lib:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH=$THIRD_BIN_PATH/dependency/libcgroup/comm/lib:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH=$THIRD_BIN_PATH/dependency/openssl/comm/lib:$LD_LIBRARY_PATH
+export LD_LIBRARY_PATH=$THIRD_BIN_PATH/dependency/libcurl/comm/lib:$LD_LIBRARY_PATH
+export PATH=$GCCFOLDER/gcc/bin:$PATH
+export PREFIX_HOME=${MY_HOME}/remote_debug/code/dest
+export GAUSSHOME=$PREFIX_HOME
+export PATH=$GAUSSHOME/bin:$PATH
+export LD_LIBRARY_PATH=$GAUSSHOME/lib:$LD_LIBRARY_PATH
+```
+
+重新`source ~/.bashrc`后，验证是否可以通过cmake编译:
+
+```shell
+cd /home/zhoubin/work/remote_debug/code
+mkdir cmake_build
+cd cmake_build
+cmake .. -DENABLE_MULTIPLE_NODES=OFF -DENABLE_THREAD_SAFETY=ON -DENABLE_MOT=ON && make -sj20 && make install -sj
+```
+
+正常编译的结尾日志如下:
+
+```shell
+-- Created symlink: libatomic.so -> libatomic.so.1.2.0
+-- Created symlink: libatomic.so.1 -> libatomic.so.1.2.0
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libsecurec.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgcc_s.so.1
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so.1
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so.1.0.0
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libxgboost.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libpljava.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/postgresql/java/pljava.jar
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/share/postgresql/tmp/udstools.py
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/./lib
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/./lib/libmasstree.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib
+-- Installing: /home/zhoubin/work/remote_debug/code/dest/lib/libatomic.so
+-- Installing: /home/zhoubin/work/remote_debug/code/dest/lib/libatomic.so.1
+-- Installing: /home/zhoubin/work/remote_debug/code/dest/lib/libatomic.so.1.2.0
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgcc_s.so.1
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so.1
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so.1.0.0
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libgomp.so
+-- Created symlink: libcgroup.so.1 -> libcgroup.so
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/share/postgresql/extension/roach_api_stub.control
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/share/postgresql/extension/roach_api_stub--1.0.sql
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/postgresql/proc_srclib
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/postgresql/pg_plugin
+-- Up-to-date: /home/zhoubin/work/remote_debug/code/dest/lib/libsimsearch
+```
+
+为了更好的支持多线程调试，应该安装debuginfo相关安装包:
+
+```shell
+yum install glibc-debuginfo-2.28-36.oe1.aarch64 -y
+dnf debuginfo-install libxcrypt-4.4.8-4.oe1.aarch64 xz-libs-5.2.5-1.oe1.aarch64 -y
+dnf debuginfo-install glibc-2.28-63.oe1.aarch64 -y
+```
+
+## 五 Clion配置
+
+### 1.配置远程服务
+
+进入clion菜单File->Settings->Tools->SSH Configurations,添加一个linux的远程连接，下面的几个服务都会用到。
+
+![clion_ssh_config](img/clion_ssh_config.png)
+
+
+
+### 2.配置Deployment
+
+Deployment用于同步windows和linux之间的文件(含代码),进入clion菜单File->Settings->Build,Execution,Deployment，配置如下:
+
+![clion_deployment_config](img/clion_deployment_config.png)
+
+这个页面的Mappings需要配置windows和linux的映射， Excluded Paths配置不需要同步的文件目录。
+
+![clion_deployment_mappings_config](img/clion_deployment_mappings_config.png)
+
+
+
+### 3.配置Toolchains
+
+Toolchain主要是配置远程编译工具链，通过File->Settings->Build,Execution,Deployment->Toolchains,配置如下：
+
+![clion_toolchains_config](img/clion_toolchains_config.png)
+
+**注意**：gdb版本要高于gcc版本，本次gdb版本为8.3.1,gcc使用社区的7.3.0。
+
+### 4.配置cmake
+
+cmake用于远程配置工程并自动编译，进入File->Settings->Build,Execution,Deployment->CMake,配置如下:
+
+![clion_cmake_config](img/clion_cmake_config.png)
+
+针对openGauss的CMake参数：
+
+```shell
+-DENABLE_MULTIPLE_NODES=OFF -DENABLE_THREAD_SAFETY=ON -DENABLE_MOT=ON
+```
+
+针对openGauss的CMake环境变量,相关路径在3.2有说明，实际配置时相对替换掉就行：
+
+```shell
+DEBUG_TYPE=debug;ARCH=aarch64;GCC_VERSION=7.3.0;THIRD_BIN_PATH=/home/zhoubin/work/binarylibs;PATH=/home/zhoubin/work/binarylibs/buildtools/gcc7.3/gcc/bin:$PATH;APPEND_FLAGS="-g3 -w -fPIC";GCCFOLDER=/home/zhoubin/work/binarylibs/buildtools/gcc7.3;CC=/home/zhoubin/work/binarylibs/buildtools/gcc7.3/gcc/bin/gcc;CXX=/home/zhoubin/work/binarylibs/buildtools/gcc7.3/gcc/bin/g++;LD_LIBRARY_PATH=$THIRD_BIN_PATH/dependency/libcurl/comm/lib:$LD_LIBRARY_PATH;PREFIX_HOME=/home/zhoubin/work/remote_debug/code/dest;GAUSSHOME=$PREFIX_HOME;BUILD_TUPLE=aarch64;JAVA_HOME=$THIRD_BIN_PATH/openjdk8/${ARCH}/jdk/
+```
+
+### 5.cmake project load
+
+以上配置完成后，底部的CMake页签会自动进行向linux服务器Deployment工程代码，并进行远程CMake编译：
+
+![clion_cmake_reload](img/clion_cmake_reload.png)
+
+如果没有自动触发，可以手动在页签上进行刷新，等编译完成，详情日志如下:
+
+```shell
+-- /home/zhoubin/work/remote_debug/code/home/zhoubin/work/remote_debug/code/cmake_build_debug/home/zhoubin/work/remote_debug/code/dest
+-- Configuring done
+-- Generating done
+-- Build files have been written to: /home/zhoubin/work/remote_debug/code/cmake_build_debug
+```
+
+### 6.install
+
+CMake远程编译无问题后，最后一步是通过菜单Build->install完成openGauss远程安装，接下来就可以进行可视化调试了：
+
+![clion_cmake_install](img/clion_cmake_install.png)
+
+等待install完成后(编译完成日志与linux下直接cmake编译一致)，可以看到右边的调试栏里所有的openGauss的程序已经进入可运行状态，这样就可以选择任意组件进行调试了。
+
+## 六 调试pg_config
+
+### 1. 选择pg_config
+
+在可调试窗口选择pg_config,本次简单执行`pg_config --help`验证代码是否可以正常断点和执行。
+
+![clion_debug_pgconfig](img/clion_debug_pgconfig.png)
+
+启动前断点打在`src\bin\pg_config\pg_config.cpp`的main函数第一行，启动调试，可以看到正确进入到断点，堆栈和变量窗口已经可视化：
+
+![clion_debug_pgconfig_enter](img/clion_debug_pgconfig_enter.png)
+
+在断点后的单步/步入/步出/全速执行均可正常执行，现在远程调试功能已经ready。
+
+## 七 调试gaussdb
+
+这一步就是最关键的gaussdb进程的调试了，在进入调试前应该先在本次关联的服务器上先初始化好数据库，再通过参数正确的启动数据库。
+
+### 1.初始化数据库
+
+本步骤需要到linux服务器上执行，选择数据库目录为/home/zhoubin/work/tmp/1,执行下面的命令即可初始化一个数据库：
+
+```shell
+mkdir -p /home/zhoubin/work/tmp/1
+gs_initdb -D /home/zhoubin/work/tmp/1 --nodename=test -w Test@123
+```
+
+初始化完成后会提示使用`gaussdb -D /home/zhoubin/work/tmp/1 --single_node`命令启动数据库，这几个参数即为下一步的入参。
+
+**提示**：默认的端口5432容易被抢占，建议修改新的端口：
+
+```shell
+gs_guc set -D /home/zhoubin/work/tmp/1 -c "port=6123"
+```
+
+
+
+### 2.启动gaussdb调试
+
+先选择gaussdb目标，并配置执行参数：
+
+![clion_debug_gaussdb](img/clion_debug_gaussdb.png)
+
+**注意**：如果确定本次并没有修改代码，可以将`Before launch`中的Build步骤删除，不然每次启动调试都要重新构建，非常耗时间！
+
+
+
+下一步断点打在`src\gausskernel\process\main\main.cpp`的main函数第一行，打完断点即可启动调试:
+
+![clion_debug_gaussdb_enter](img/clion_debug_gaussdb_enter.png)
+
+可以看到断点进入了，并且常用的上下文变量`g_instance\t_thrd\u_sess`（手工添加的)都可视化了：
+
+![clion_debug_gaussdb_debugin](img/clion_debug_gaussdb_debugin.png)
+
+下一步全速执行时，突然断在了__poll函数，这是因为自定义的SIGUSR2信号被触发了，可以在gdb窗口执行`handle SIGUSR2 nostop noprint` 使进程继续执行：
+
+![clion_debug_gaussdb_handlesig](img/clion_debug_gaussdb_handlesig.png)
+
+现在就可以在可视化界面任意打断点、调试验证了。一起来参与openGauss内核代码贡献吧！！！
+
+## 八 FAQ
+
+本次搭建环境出了各种各样的错误，还是将遇到的问题做个记录。
+
+## 1. 第五步cmake project load的CMake窗口提示"Cannot reslove path"
+
+![clion_fail_cmake](img/clion_fail_cmake.png)
+
+**原因**: Clion版本bug,[链接](https://youtrack.jetbrains.com/issue/CPP-14487), Deployment的`root path`和Mappings配置已经失效。
+
+**解决方法**: 替换Clion新版本或者重启Clion后删除旧的Deployment，重新配置一次(建议换新版本，别在这折腾了)。
+
+### 2.cmake各种莫名其妙的报错
+
+**解决方法**:在CMake配置界面，增加`--trace`参数，然后查看cmake日志分析。
+
+### 3.调试时提示"warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available"
+
+**解决方法**：编辑`~/.gdbinit`文件，添加下面内容：
+
+```shell
+set auto-load safe-path /
+add-auto-load-safe-path /lib64/libthread_db-1.0.so
+```
+
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