spinlock instances call on misaligned address

[w41ter]

$ uname -a
Linux Desktop 4.4.0-43-Microsoft #1-Microsoft Wed Dec 31 14:42:53 PST 2014 x86_64 x86_64 x86_64 GNU/Linux
$ clang++ --version
clang version 5.0.0-3~16.04.1 (tags/RELEASE_500/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

when compile with -fsanitize=undefined to check undefined behaviour, throws:

include/libcuckoo/cuckoohash_map.hh:762:5: runtime error: constructor call on misaligned address 0x7f3776070010 for type 'cuckoohash_map<std::__1::basic_string<char>, std::__1::basic_string<char>, std::__1::hash<std::__1::basic_string<char> >, std::__1::equal_to<std::__1::basic_string<char> >, std::__1::allocator<std::__1::pair<const std::__1::basic_string<char>, std::__1::basic_string<char> > >, 4>::spinlock *', which requires 64 byte alignment
0x7f3776070010: note: pointer points here
 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  00 00 00 00

[manugoyal-nuro]

Thanks for investigating! I think this is a duplicate of #53. The fix would be to use an aligned allocator for spinlocks.

[manugoyal]

Closing as this is a duplicate of #53.