Scripting Eclipse Java Debugger?

Question

When using gdb to debug there are a couple of ways to automate the actions performed when a break point is hit. This is good for cases where I only have compiled code with debug symbols, not source code. It is also nice when I want to instrument something interactively without relying on code reloading to insert print statements.

Is there a way to do this with the Eclipse debugger and Java code? All I need is a way to print objects and variables and then continue from the breakpoint.

Can't you just hover over the object in question and inspect it? There's also a "variables" view for the debug perspective, right for this purpose. You can even change values on the run, within their scope. — Mena
– Mena, Commented Jul 6, 2015 at 16:11
Yes but doing that manually is slow and tedious when I can automate it. Also, then the history of values is in my head instead of in the console. — asm
– asm, Commented Jul 6, 2015 at 17:31
I can "instrument something interactively without relying on code reloading". — asm
– asm, Commented Jul 6, 2015 at 17:42

Grim · Accepted Answer · 2015-07-22 14:16:49Z

2

You can inject code using conditional breakpoints.

In this example the breakpoint never suspends because of return false;, but always print the absolut path of a file-variable named "file"! enter image description here

edited Jul 22, 2015 at 14:16

answered Jul 6, 2015 at 16:12

Grim

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2 Comments

asm Over a year ago

Thanks, I did not realize that this could be arbitrary code.

Mena Over a year ago

Interesting. Can't wait to try that stuff out!

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