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From: "eigelc at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug rust/29550] Segmentation fault in infrun.c
Date: Thu, 08 Sep 2022 08:31:09 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29550

--- Comment #2 from Cristian Eigel <eigelc at gmail dot com> ---
This is going to be rather complex and you need rust 1.63 to reproduce (the
project is written in rust). This can only be done in Linux. The project I =
was
debugging is this: https://github.com/esrlabs/northstar. Please download it.

>From the quickstart (in the Readme) run these steps:
```
sudo apt-get install build-essential libclang1 squashfs-tools
./examples/build_examples.sh
cargo run --release --bin northstar
```

The last command will ask for an elevation of privilege. The script which is
doing that is .cargo/runner-x86_64-unknown-linux-gnu (in case you want to
inspect what's it trying to do). The script is running because the
.cargo/config has it set as a runner.


In yet another console, run ps -a and get the pid of northstar-fork. Then r=
un
sudo gdb --pid {THAT_PID_ABOVE}
Once in gdb run these commands

```
set follow-fork-mode child
b northstar-runtime/src/runtime/fork/init/mod.rs:150
continue
```

These should be after the fork call in the function run.

Now in another console:
```
cargo run --release --bin northstar-nstar -- start console
```
At these point the gdb would get the seg-fault.

If you want to stop just before the seg-fault, then put the break at line 1=
44
(or before the fork is called) and then next from there.

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