The LLVM AddressSanitizer can be used to run an instrumented version of Window.js that looks for memory leaks, uses-after-free, uninitialized reads and other memory bugs.

This requires a debug build on Linux with Clang.

First, edit src/CMakeLists.txt and enable the -fsanitize=address options. Then make a full rebuild of Window.js in Debug mode.

Some of the leaks detected by ASAN come from external library and are just distracting; they can be suppressed by setting this environment variable:

$ export LSAN_OPTIONS=suppressions=libraries/asan-linux-suppressions.txt

Now just run windowjs as usual, and ASAN will report any memory issues found at shutdown.