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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
e03e593143
Unaliged stores are unspecified behavior according to C rules, hence address sanitizers may complain. Even though this worked fine in practice (it's almost impossible here for the compiler to do something "wrong" even if it assumes the store is aligned, given such stores work just fine on x86), we should follow the rules. The widely accepted solution for this (it may be somewhat surprising you can't actually do unaligned assignments explicitly somehow in C) nowadays is to just use memcpy(). The compiler should figure out (at least with optimizations enabled) it's just a trivial store and optimize it back to a single cpu instruction, while still satisfying asan. (I've verified that even in debug builds the memcpy() is actually optimized away anyway, I suspect there's some compiler flags somewhere forcing this behavior.) Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/10208 Reviewed-by: Jose Fonseca <jose.fonseca@broadcom.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27896> |
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.