如何调试eclipse后端代码？

Question

我正在工作的eclipse JUNO由我工作的公司自定义。当我单击特定菜单时，它没有按应有的方式工作。因此，我想查看负责该代码或可能是哪个代码单击该插件会被调用，该怎么办？

Answer 1

You have two options:

1. Run your customized eclipse from your development environment in debug mode
2. Attach to running customized eclipse using Eclipse remote debugger

Both options require to have configured development environment in Eclipse, I prefer to use option (2) because it doesn't require to have everything compiled and you always can add missing sources into development environment being in debugging session.

(1) You need to have all sources imported in dev eclipse and compiled without errors. Then you just create Eclipse Application launch configuration and run it in debug mode.

(2) Yo need to start your customized eclipse with remote debugger enabled. Add in your custom eclipse eclipse.ini file following lines in -vmargs part

-Xdebug
-Xrunjdwp:transport=dt_socket,address=8001,server=y,suspend=y

So you would have something like this

-startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.100.v20110505
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-XX:MaxPermSize=512m
-Xms1024m
-Xmx2048m
-Xdebug
-Xrunjdwp:transport=dt_socket,address=8001,server=y,suspend=y

Now you can start custom eclipse. You won't see anything because it would be in debug mode and wait until remote debugger is attached. Console output should contain message

...
Listening for transport dt_socket at address: 8001

In your development eclipse import source code you want to debug. Make sure you use source code the custom eclipse was built from or line numbers won't match in debug. There is no need to have source compiled without errors.

Go in Project->Debug Configurations ... and create new Remote Java Application config.

Give it name you want and configure port as 8001 (see options in eclipse.ini above).

Go to Source tab and add all projects with sources you need during debug.

Run it, ignore warning about compilation errors and you should see eclipse splash form your custom eclipse started before. After that you can use debugger as usual.