Using Go for Systems Programming
by Başar Subaşı
Discover how Go functions under the hood as a modern systems programming language. Learn how Go makes system calls directly, resulting in self-contained binaries that have no libc dependencies.
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Tutorials, challenges, courses, skill paths, playgrounds, and more — search the whole library in one place.
Writing a (valid) C program without main()
by Başar Subaşı
Walk through the C compilation pipeline: preprocessor, compiler, assembler, and linker. Start with a normal hello world, inspect macros and generated assembly, and end by producing a running binary that has no main() function.
Utilize POSIX Threads for Concurrency
by Başar Subaşı
Refactor a slow, single-threaded C file downloader that fetches files sequentially into a multi-threaded program using POSIX Threads (pthreads) to achieve concurrent downloads.
Create a Process from Scratch Using Syscalls
by Başar Subaşı
Write a C program that calls fork() to clone a process and execve() to execute a command, then print and retrieve the child process PID.
Count Optimized Assembly Instructions
by Başar Subaşı
Compile a small C loop with -O2 -S, inspect the generated assembly, report how many add instructions gcc produced and see how much it has optimized the equasion.
Inspect a Preprocessor Macro Expansion
by Başar Subaşı
Run gcc -E on a small C program and find the exact line where the preprocessor expanded a macro into a printf call.