Second, it required enabling experimental WebAssembly thread support. ![]() ![]() However, it turned out, that getting GDB to compile was just a tip of the iceberg:įirst of all, the binary we got was huge - about 90MB! We tackled all the compiler issues one by one, and 7 patch files later, we got it to compile! spent the next evening on a very long call with my friend Benny Meisels. I set up a Docker container with Emscripten, a WebAssembly compiler toolchain, downloaded the latest GDB source archive, and. This seemed like the most straightforward solution, and I also expected it to provide decent performance. My first thought was: GDB is written in C/C++, so I may be able to compile it into a WebAssembly binary, which can run in any modern browser. Let's get started! First Attempt: WebAssembly In this blog post, I'll share with you three different approaches I tried, and the surprising solution: running GDB using a tiny Linux system running in a Virtual Machine (VM) inside the browser. The Wokwi Simulator is running in the browser, so it only made sense to try and get GDB to run in the browser too, giving our users that magical click on a link and get right into GDB experience. In short - the user experience was far from ideal. However, using GDB in Wokwi wasn't easy: you had to download and install a copy of avr-gdb on your computer, and then also download and set up a special proxy that would bridge the simulator running in the browser with GDB. ![]() ![]() Recently, I added GDB support for the Wokwi Arduino Simulator, by implementing the gdbserver protocol.
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