xlibtrace | LD_PRELOAD library to trace libX11 calls

xlibtrace is a Shell library. xlibtrace has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

xlibtrace displays the interaction between X11 client programs and the X11 client shared library (libX11.so), by showing the Xlib calls that are made. Output is shown in a similar style to strace(1). xlibtrace works by using the $LD_PRELOAD dynamic linker option to insert itself between the target X11 client program and libX11.so. This allows it to "intercept" all calls to X functions, whereupon it has the opportunity to print the name of the function being called, along with any arguments and return value. xlibtrace allows the user to investigate which X functions are being called, when they are being called, what parameters are passed and what the return value is. This can be particularly useful when analysing the behaviour of closed-source X11 programs.