To attach the VSCode debugger to a running process, make sure that the program enables debugging support, obtains process information, configures the launch.json file, and starts debugging. 1. The program must be started in debug mode, such as Node.js uses --inspect, Python uses debugpy; 2. Get the IP and port of the target process, which can be queried through the service log or command line tool; 3. Add the attachment type configuration in launch.json to specify the correct host and port; 4. Select configuration in VSCode and start debugging, pay attention to checking the connection status and log prompts to solve common problems.
To attach a VSCode debugger to a running process, the key is to configure how the debugger and the target program communicate. Different languages have different debugging protocols and plug-in support, but the overall idea is the same: find the target process, enable the debug port, and set connection parameters in VSCode.
1. Make sure the program has debug support enabled
Debuggers in most languages require the program to be debugged with debug parameters at startup. For example:
- Node.js needs to be started with
--inspector--inspect-brk - Python may need to use
ptvsdordebugpypackages to enable remote debugging - .NET Core uses the
--debugparameter or appends it throughdotnet dbgcommand
If you don't know whether the program supports remote debugging, first check the document to confirm whether there are relevant parameters or plug-in support.
2. Obtain information about the target process
You need to know the IP address of the target process ( localhost if it is local) and the debug port number. Some services will output listening addresses when starting, for example, Node.js uses 9229 by default, and Python's debugpy is 5678 by default.
You can also use the command line tool to find:
-
tasklistandnetstatcan be used on Windows - You can use
ps aux | grep <program></program>andlsof -i :<port></port>on Linux/macOS
3. Configure the launch.json file of VSCode
VSCode's debugging function depends on .vscode/launch.json file. You need to add a configuration item of "attach". Here is an example of Python:
{
"name": "Python: Attach",
"type": "python",
"request": "attach",
"connect": {
"host": "localhost",
"port": 5678
}
}For Node.js, you can write it like this:
{
"name": "Node.js: Attach",
"type": "node",
"request": "attach",
"runtimeExecutable": null,
"runtimeArgs": [],
"restart": false,
"console": "integratedTerminal",
"internalConsoleOptions": "neverOpen"
} The key is to set request to "attach" and ensure that the port is consistent with the target process.
4. Start debugging
After saving the configuration, open the debug sidebar in VSCode, select the item you just configured, and click "Start debugging". If everything works fine, you should be able to see the breakpoint being activated and you can see the current execution status in the call stack.
FAQ:
- The connection may be because the firewall or the port is not open
- If you do not see variable information, check if the language server or debugger version matches
- Sometimes it takes a few seconds to connect, don't cancel it too quickly
Basically that's it. As long as the target program supports debug mode, VSCode can be connected through configuration. The details are prone to errors in the port and debugger types, and paying more attention to log prompts will be more helpful.
The above is the detailed content of How to attach VSCode debugger to a running process?. For more information, please follow other related articles on the PHP Chinese website!
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