This is the second post about debugging with strace. In our solution, we have a process that runs another process. The parent communicates with the child process via TCP socket. In order to know whether the child is ready for communication the parent reads its stdout and looks for the…

Debugging is an important part of software engineering and every developer has a few debugging tools in his toolbelt. Usually, I use logs and a debugger and that’s enough for my everyday work. But lately, I had to work with an open-source SIP client called baresip. Baresip is a very…

I was recently investigating a bug and would like to share an unexpected, yet interesting discovery regarding the cause of the issue. In order to provide an idea of what I was working on, consider the following code as a simplified representation: In my case, the code was working…

Exceptions are an inherent part of modern C++. Everything is clear with the exceptions that can be handled, but what do we do with the exceptions that have no foreseeable resolution? One of the ways to work with them is to catch, log, and exit the application. …

For the past five years, my go-to text editors have been Vim and gVim/ MacVim. Currently, I work on macOS with Ubuntu, as a target OS, running on the local VMware Fusion virtual machine. Personally, I prefer to use the macOS GUI over Ubuntu and do not enjoy constantly switching between…

Recently, I was writing a script whose function was to retrieve and parse a list of processes that were running in a docker container. The script was based on another script that did the same by ssh-ing to a remote server. …

Intro Recently, I have been reviewing the function std::async and decided to get a better understanding. The C++ standard says: The function template async provides a mechanism to launch a function potentially in a new thread and provides the result of the function in a future object with which it shares…

As a reader may know UDP network protocol does not support either message retransmission or acknowledge. It means that all these problems are supposed to be handled at the application level. In the audio/video transmission domain the problem is usually solved with forward error correction technique. The idea is to…

Once upon a time, in the company where I work for there was a bug in production that caused to the “Too many files open” error. I was able to locate the class responsible for the issue, it was a class working with os.pipefile descriptors, let’s call it OsPipeHolder. …