Daniel Stone 6c8ae362bb CI: Never unload llvmpipe DSO whilst testing ... This commit is truly horrible. We want to run ASan with leak checking enabled in CI so we can catch memory leaks before they're introduced. This works well with Pixman, and with NIR-only drivers like iris or Panfrost. But when we run under llvmpipe - which we do under CI - we start failing because: - Mesa pulls in llvmpipe via dlopen - llvmpipe pulls in LLVM itself via DT_NEEDED - initialising LLVM's global type/etc systems performs thread-local allocations - llvmpipe can't free those allocations since the application might also be using LLVM - Weston stops using GL and destroys all GL objects, leading to Mesa unloading llvmpipe like it should - with everything disappearing from the process's vmap, ASan can no longer keep track of still-reachable pointers - tests fail because LLVM is 'leaking' Usually, an alternative is to LD_PRELOAD a shim which overrides dlclose() to be a no-op. This is not usable here, because when $LD_PRELOAD is not empty and ASan is not first in it, ASan immediately errors out. Prepending ASan doesn't work, because we run our tests through Meson (which also invokes Ninja), leading to LSan exploding over CPython and Ninja, which is not what we're interested in. It would be possible to inject _both_ ASan and a dlclose-does-nothing shim DSO into the LD_PRELOAD environment for every test, but that seems even worse, especially as Meson strongly discourages globbing for random files in the root. So, here we are, doing what we can: finding where swrast_dri.so (aka llvmpipe) lives, stashing that in an environment variable, and deliberately leaking a dlopen handle which we never close to ensure that neither llvmpipe nor LLVM leave our process's address space before we exit. Signed-off-by: Daniel Stone <daniels@collabora.com>		2022-07-05 10:15:49 +01:00
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per-test-asan.sh	CI: Disable ASan fast unwinding for suppressions	2022-07-05 10:15:48 +01:00
run-weston-tests.sh	CI: Never unload llvmpipe DSO whilst testing	2022-07-05 10:15:49 +01:00