On Thu, 12 Jan 2023 20:28:50 GMT, Justin King <jck...@openjdk.org> wrote:
> The implementation of `offset_of` for GCC/Clang only deals with types are > aligned to 16 bytes or less, if they are more, such as `zCollectedHeap` the > behavior is undefined. UBSan also suggests that `offset_of` is not always a > compile time constant, as the stack trace came from the dynamic loader during > library loading. This patch changes `offset_of` to use `offsetof` and > disables the warning `invalid-offsetof` for the JVM. Please don't make this change. We are intentionally not using offsetof. See JDK-8239357. A change to the existing code would be to use `alignof(klass)` to align the space buffer, once use of `alignof` is approved. That would fix the alignment problem. ------------- PR: https://git.openjdk.org/jdk/pull/11978
