On Thu, 4 Feb 2021 09:49:17 GMT, Vladimir Kempik <vkem...@openjdk.org> wrote:
> > You read my mind, Andrew. Unless, of course, it's optimized to leverage the > > fact that it's thread-specific.. > > it's thread-specific > > https://developer.apple.com/documentation/apple_silicon/porting_just-in-time_compilers_to_apple_silicon > > > Because pthread_jit_write_protect_np changes only the current thread’s > > permissions, avoid accessing the same memory region from multiple threads. > > Giving multiple threads access to the same memory region opens up a > > potential attack vector, in which one thread has write access and another > > has executable access to the same region. Umm, so how does patching work? We don't even know if other threads are executing the code we need to patch. ------------- PR: https://git.openjdk.java.net/jdk/pull/2200
