> Support for this flag landed in Clang in 2020 only for X86, SystemZ and PowerPC.<p>How relevant is x86 code in terms of security? Genuine question. I thought Firefox defaults to x86_64 now even Windows. And in open source land, wouldn’t any OS components that could be compiled with Clang be x86_64 as well?
MSVC had this for as long as I can remember. I was a little surprised the major Linux compilers didn't have code to trigger guard pages on large allocations. It's not totally unreasonable to access a large buffer from the top down.