Debugging/zh-cn

测试先行
Before you go through the pain of debugging use the Test framework to check if the standard tests work properly. If they do not run complete there is possibly a broken installation.

命令行
FreeCAD 的 "调试" 是由一些内部机制支持的. FreeCAD 的命令行版本提供了一些用于调试支持的选项.

The debugging of FreeCAD is supported by a few internal mechanisms. The command line version of FreeCAD provides some options for debugging support.

以下是 FreeCAD 0.15 中能识别的选项:

一般性选项: -v [ --version ]     打印版本字符串 -h [ --help ]        打印帮助信息 -c [ --console ]     以控制台模式启动 --response-file arg  也能使用 '@name' 指定

配置: -l [ --write-log ]      输出 log 文件到: $HOME/.FreeCAD/FreeCAD.log --log-file arg          不像 --write-log，这个命令允许记录到任意文件 -u [ --user-cfg ] arg   用于加载/保存用户设置的用户配置文件 -s [ --system-cfg ] arg 用于加载/保存系统设置的用户配置文件 -t [ --run-test ] arg   测试等级 -M [ --module-path ] arg 额外的模块路径 -P [ --python-path ] arg 额外的python路径

生成回溯
如果你运行 FreeCAD 开发中的出血边缘(bleeding edge)版本, 则可能会发生 "崩溃 ". 您可以通过向开发人员提供 "回溯 " 来帮助解决此类问题. 为此, 您需要运行软件的 "调试版本 ". "调试生成 " 是在编译时设置的参数, 因此您需要自己编译 FreeCAD, 或者获取编译 "调试 " 版本.

If you are running a version of FreeCAD from the bleeding edge of the development curve, it may "crash". You can help solve such problems by providing the developers with a "backtrace". To do this, you need to be running a "debug build" of the software. "Debug build" is a parameter that is set at compile time, so you'll either need to compile FreeCAD yourself, or obtain a pre-compiled "debug" version.

对于 Linux
Linux 调试 > 必要条件:

Linux Debugging →

Prerequisites:


 * 安装的 gdb 软件包
 * FreeCAD 的调试版本 (此时仅可通过 从源代码构建)
 * 导致崩溃的 FreeCAD 模式

步骤: 在终端窗口中输入以下内容:

Find FreeCAD binary on your system:

GNUdebugger will output some initializing information. The (gdb) shows GNUDebugger is running in the terminal, now input:

FreeCAD 现在就要启动. 执行导致 FreeCAD 崩溃或冻结的步骤, 然后在终端窗口中输入: (gdb) bt 这将生成一个冗长的列表, 确切地列出程序在崩溃或冻结时正在执行的工作. 将此内容包括在问题报告中.

This will generate a lengthy listing of exactly what the program was doing when it crashed or froze. Include this with your problem report.

Print the values of the local variables also. This can be combined with a number to limit the number of frames shown.

对于 MacOSX
MacOSX 调试 > 必要条件:

macOS Debugging →

Prerequisites:


 * 安装好的软件包 lldb
 * FreeCAD 的调试版本
 * 一个导致崩溃的 FreeCAD 模式

步骤: 在终端窗口中输入以下内容:

LLDB will output some initializing information. The (lldb) shows the debugger is running in the terminal, now input:

FreeCAD 现在就要启动. 执行导致 FreeCAD 崩溃或冻结的步骤, 然后在终端窗口中输入: (lldb) bt 这将生成一个冗长的列表, 确切地列出程序在崩溃或冻结时正在执行的工作. 将此内容包括在问题报告中.

This will generate a lengthy listing of exactly what the program was doing when it crashed or froze. Include this with your problem report.

List Libraries Loaded by FreeCAD
(Applicable to Linux and macOS)

Sometimes it's helpful to understand what libraries FreeCAD is loading, specifically if there are multiple libraries being loaded of the same name but different versions (version collision). In order to see which libraries are loaded by FreeCAD when it crashes you should open a terminal and run it in the debugger. In a second terminal window, find out the process id of FreeCAD:

Use the returned id and pass it to :

This prints a long list of loaded resources. So for example, if trying to ascertain if more than one Coin3d library versions is loaded, scroll through the list or search directly for Coin in the output:

Python 调试
这里是一个在 FreeCAD 中使用 winpdb 的例子:

For a more modern approach to debugging Python, see these posts:
 * Debugging macros with VS 2017
 * Python workbenches debugging
 * python3.dll, Qt5Windgets.dll, Qt5Gui.dll and Qt5Core.dll not found

winpdb
winpdb Debugging →

Here is an example of using Winpdb inside FreeCAD:

We need the Python debugger: Winpdb. If you do not have it installed, on Ubuntu/Debian install it with:

Now lets setup the debugger.


 * 1) Start Winpdb.
 * 2) Set the debugger password to "test": Go to menu File → ''Password" and set the password.

Now we will run a test Python script in FreeCAD step by step.


 * 1) 运行 winpdb 并且设置密码 (例如：测试)
 * 2) 使用以下内容创建一个 Python 文件


 * 1) 开始 FreeCAD 并将上述文件加载到 FreeCAD
 * 2) 按 F6 执行
 * 3) 现在 FreeCAD 将变得没有响应, 因为 Python 调试器正在等待
 * 4) 切换到 Windpdb GUI, 然后单击  "附加 ". 几秒钟后, 将出现一个项目  " ", 您必须双击
 * 现在, 当前执行的脚本出现在 Winpdb 中.
 * 1) 在最后一行设置断点并按 F5
 * 2) 现在按 F7 键跟踪 Python 代码 Draft.makeWire

Visual Studio Code (VS Code)
VS Code Debugging →

Prerequisites:


 * The ptvsd package needs to be installed in a Python 3 outside of FreeCAD, then the module must be copied to FreeCAD's Python library folder.

pypi page

Visual Studio Code documentation for remote debugging

Steps:
 * Add following code at the beginning of your script


 * Add a debug configuration in Visual Studio Code.
 * The config should look like this:

"configurations": [ {           "name": "Python: Attacher", "type": "python", "request": "attach", "port": 5678, "host": "localhost", "pathMappings": [ {                   "localRoot": "${workspaceFolder}", "remoteRoot": "." }           ]        },


 * In VS Code add a breakpoint anywhere you want.
 * Launch the script in FreeCAD. FreeCAD freeze waiting for attachment.
 * In VS Code start debugging using created configuration. You should see variables in debugger area.
 * When setting breakpoints, VS Code will complain about not finding the .py file opened in the VS Code editor.
 * Change "remoteRoot": "." to "remoteRoot": " "
 * For example, if the Python file resides in /home/FC_myscripts/myscript.py
 * Change to: "remoteRoot": "/home/FC_myscripts"
 * If you're just debugging FreeCAD macros from the FreeCAD macro folder, and that folder is "C:/Users/ /AppData/Roaming/FreeCAD/Macro", then use:
 * "localRoot": "C:/Users/ /AppData/Roaming/FreeCAD/Macro",
 * "remoteRoot": "C:/Users/ /AppData/Roaming/FreeCAD/Macro"
 * If your macro can't find ptvsd despite having installed it somewhere precede 'import ptvsd' with

Where the path is to the directory where ptvsd was installed. In the Mac package it is /Applications/FreeCAD.App/Contents/Resources/bin/python.
 * On the left bottom edge of VSCode you can choose the Python executable - it's best to make this the version packaged with FreeCAD.

You can locate it on your system by typing

into FreeCAD's Python console.

With LiClipse and AppImage
LiClipse Debugging →


 * Extract AppImage.


 * The sqashfs-root location is where the debugger later on is hooked up to.


 * Make sure you can start a FreeCAD session from within the squashfs-root location.


 * Should start up a FreeCAD commandline session.


 * Install LiClipse.
 * Comes ready with pydev and has installers for all platforms.
 * For linux it is just to extract (to any location) and run.


 * Configure liclipse for debugging.
 * Right-click pydev icon (upper right corner) and choose customize.
 * Activate "PyDev Debug" (through checkbox, or it might be needed to go to tab "Action Set Availability" and activate there first).
 * In the pydev menu you can now choose "start debug server".
 * Use menu window/open perspective/other > debug.
 * Right-click debug icon (upper right corner) and choose customize.
 * Checking "Debug" brings the debugging navigation tools to the toolbar.
 * Open preferences through menu window/preferences.
 * In PyDev/Interpreters add "new Interpreter by browsing".
 * The added interpreter should be:.
 * If you are only using this for fc, you can add AddOn workbench folders as well, or do that in a pydev-project later on.


 * Find path to in your liclipse installation.
 * Something along the lines of:.
 * Create a regular pydev-project in liclipse.
 * Import external sources, for example a macro that you want to debug, or an external workbench.
 * In that macro (or workbench .py file) add the code lines:




 * This is where the execution will halt when the macro is run.


 * Start the liclipse debug server (menu pydev).


 * Start FreeCAD.


 * Run the macro (or any other file with a trigger) from within freecad, as you would normally do.


 * Happy debugging.


 * The use of LiClipse for remote debugging, and the steps described here related to liclipse, should work on any platform. The parts related to AppImage is for linux only.

Debugging OpenCasCade
For developers needing to dig deeper in to the OpenCasCade kernel, user @abdullah has created a thread orientation discussing how to do so.