eclipse: debug programmatically initiated process

I'm programmatically executi开发者_运维知识库ng a java process via another java process in eclipse:

Process process = Runtime.getRuntime().exec(command, envp, dir);

Is there any way to tell eclipse to debug the child process?

Alternatively, I could solve this by chaining multiple launch configurations, ie launch process A, on completion launch process B - provided B could be launched in debug mode.

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If you use the "Remote Debug" feature in Eclipse then you can point it at any JVM instance. You just need to make sure that each instance is told to use a unique JDWP port. This is how you'd do it from the command line:

java -Xdebug -Xrunjdwp:transport=dt_socket,address=8998,server=y

So, change the 'address' part to whatever port you want, then you can point Eclipse at that port. Here's some more information:

http://java.dzone.com/articles/how-debug-remote-java-applicat

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Add a command line option to the child process as follows:

-Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=9999

(you can use a different port number than 9999, it's up to you, but best choose a number above 1024)

Then in Eclipse, create a Debug Configuration of type "Remote Java Application". Set the host as localhost and the port as 9999.

This developerWorks article has plenty of extra information.

EDIT: Incidentally for more flexibility in specifying the command line and environment of your child process, use the java.lang.ProcessBuilder class instead of Runtime.exec(...).