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e09bc37026
OpenJDK 11 misuses the low bits in pointers that have an assumed alignment. This is undefined behavior and compiler optimizations break the code at runtime, causing SIGSEGV in the garbage collector. This was originally noticed for clang13, but GCC15 seems to do similar optimizations now. The UB was removed in JDK14. See https://bugs.openjdk.org/browse/JDK-8229258 This is a smaller version of the unsuccessful backport PR proposed upstream: https://github.com/openjdk/jdk11u-dev/pull/1284 Removed the .github/workflows changes and everything from the markOop to markWord rename and file move from the patch. I found a way to avoid most of the `markOopDesc`->`markOop` renames with a typedef, and dropped the changes to all architectures besides x86 and aarch64. Fixes: https://github.com/nixos/nixpkgs/issues/526834