Add debugging instructions (#985)

Add debugging instructions: pycharm + pdb

docs/debugging.md

@@ -0,0 +1,81 @@
+## Debugging
+
+Debugging GEF has a trick, let's see some examples
+
+## Debugging a command execution with pdb
+
+Open gef.py
+
+Search for **class NopCommand(GenericCommand)**, go to do_invoke method and insert:
+
+```python
+import pdb; pdb.set_trace()
+```
+
+Open a gdb session -> start -> nop
+
+Done!
+
+```bash
+gef➤  nop
+> /home/dreg/.gef-7c170cf6be3d84b2672a22e43b9128a23fe53c3b.py(6075)do_invoke()
+-> args : argparse.Namespace = kwargs["arguments"]
+(Pdb) ll
+6070 	    @only_if_gdb_running
+6071 	    @parse_arguments({"address": "$pc"}, {"--i": 1, "--b": True, "--f": True, "--n": True})
+6072 	    def do_invoke(self, _: List[str], **kwargs: Any) -> None:
+6073 	        import pdb; pdb.set_trace()
+6074
+6075 ->	        args : argparse.Namespace = kwargs["arguments"]
+6076 	        address = parse_address(args.address)
+```
+
+Learn more about [pdb](https://docs.python.org/3/library/pdb.html)
+
+## Debugging a command execution with pycharm
+
+Install [pycharm](https://www.jetbrains.com/help/pycharm/installation-guide.html)
+
+Create a new project:
+
+![pycharm1](https://github.com/hugsy/gef/assets/9882181/600a9522-208a-4f2e-89b2-707136ba020a)
+
+![pycharm2](https://github.com/hugsy/gef/assets/9882181/4cf51b17-6aa0-463f-b538-200dd9e9b5e6)
+
+Go to menu -> Run -> Edit configurations...:
+
+![pycharm3](https://github.com/hugsy/gef/assets/9882181/6fdacda8-c4cc-44e0-8fc1-3b18cf118fbe)
+
+Create a Python Debug Server:
+
+![pycharm4](https://github.com/hugsy/gef/assets/9882181/09f99b28-5716-48be-8a0c-8ed69920c4a0)
+
+![pycharm5](https://github.com/hugsy/gef/assets/9882181/814fe019-c390-4ca3-8605-e3842be04df1)
+
+Debug your new Unnamed:
+
+![pycharm6](https://github.com/hugsy/gef/assets/9882181/f0f1eee9-fcaa-4919-8985-8d7d09907ebd)
+
+![pycharm7](https://github.com/hugsy/gef/assets/9882181/039e8749-b949-49e8-917f-b592f9cf6dac)
+
+Copy the info from output Window to gef.py:
+
+![pycharm8](https://github.com/hugsy/gef/assets/9882181/be24ee23-3101-4b71-b62f-70883c9135ad)
+
+First, add to gef.py:
+
+```python
+import pydevd_pycharm
+```
+
+Second, search for **class NopCommand(GenericCommand)**, go to do_invoke method and insert:
+
+```python
+pydevd_pycharm.settrace('localhost', port=35747, stdoutToServer=True, stderrToServer=True)
+```
+
+Open a gdb session -> start -> nop
+
+Done!
+
+![pycharm9](https://github.com/hugsy/gef/assets/9882181/b22ec431-57e7-442a-835e-5817bdac7687)

mkdocs.yml

@@ -21,6 +21,7 @@ nav:
   - Testing: testing.md
   - Write extensions: api.md
   - API: api/gef.md
+  - Debugging: debugging.md
   - Coverage: https://hugsy.github.io/gef/coverage/
 - Commands:
   - aliases: commands/aliases.md