Question: how does the RPC bridge handle class callbacks? about ghidra_bridge HOT 3 CLOSED

Ok, I've answered my own question. THIS IS AMAZING! Truly @justfoxing, amazing project. This works:

[ins] In [1]: import ghidra_bridge
         ...: b = ghidra_bridge.GhidraBridge(namespace=globals()) # creates the bridge and loads the fl
         ...: at API into the global namespace
         ...: print(getState().getCurrentAddress().getOffset())
4196125

[ins] In [2]: module = b.remote_import("ghidra.framework.model")

[ins] In [6]: class MyListener(module.DomainObjectListener):
         ...:     def domainObjectChanged(self, ev):
         ...:         print(ev)
         ...: 

[ins] In [7]: l = MyListener()

[ins] In [8]: l
Out[8]: <_bridged___main__.MyListener('org.python.proxies.__main__$MyListener$7@4082bddb', type=__main__.MyListener, handle=93b68807-cf8e-4a3e-9452-76a43a2198a7)>

[ins] In [9]: currentProgram.addListener(l)

ghidra.framework.model.DomainObjectChangedEvent[source=fauxware - .ProgramDB]

That last line you are seeing is a callback being handled after I changed a name in Ghidra. Wow, I'm honestly amazing.

I did however get one crash on the Ghidra side:

AttributeError: 'ghidra.program.database.ProgramDB' object has no attribute '__module__'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'ghidra.program.database.ProgramDB' object has no attribute '__module__'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'instancemethod' object has no attribute '_partialmethod'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'instancemethod' object has no attribute '__code__'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'instancemethod' object has no attribute '__defaults__'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'instancemethod' object has no attribute '__kwdefaults__'
Traceback (most recent call last):
  File "/home/mahaloz/ghidra_scripts/jfx_bridge/bridge.py", line 1003, in local_get
    result = getattr(target, name)
AttributeError: 'instancemethod' object has no attribute '__text_signature__'

from ghidra_bridge.

Yup, you can subclass Java classes remotely, this is super cursed :P Glad you've got your code sorted. Be aware that you may end up with issues if you close your ghidra bridge client while you have a callback like this registered - Ghidra will keep trying to send events to the callback, and the ghidra bridge server will throw exceptions when it finds the connection from the client closed, which can make things very sad if it's a callback that blocks the UI thread. If you do start having problems with that, check out https://github.com/justfoxing/jfx_bridge/#remoteify-and-remote-exec for an example of pushing a custom callback class onto the Ghidra-side to allow you to handle client disconnects safely.

As for the crash - hard to say without seeing the code you're using. Is it actually crashing your code, or is it just logging a bunch of AttributeErrors? IPython in particular queries for a bunch of attributes that may or may not exist as part of its amazing featureset, so a bunch of AttributeErrors are expected there.

from ghidra_bridge.

Yeah @justfoxing, the code I used to trigger this is exactly the code you see above in an IPython instance.
As for the disconnection causing crashes after you disconnect, you are totally right; It does, lol. Thanks for the advice, I'll close the issue since those crashes aren't causing anything bad :).

from ghidra_bridge.