On Wed, 20 Aug 2025 15:36:14 GMT, Evgeny Astigeevich <eastigeev...@openjdk.org> wrote:
> There is a race between `JvmtiClassFileReconstituter::copy_bytecodes` and > `InstanceKlass::link_class_impl`. `InstanceKlass::link_class_impl` can be > rewriting bytecodes. `JvmtiClassFileReconstituter::copy_bytecodes` will not > restore them to the original ones because the flag `rewritten` is `false`. > This will result in invalid bytecode. > > This PR adds a lock (`init_lock`) to the `copy_bytecodes` method to prevent > reading bytecodes while they are being rewritten during class linking. > > Tested fastdebug and release builds: Linux x86_64 and arm64 > - The reproducer from JDK-8277444 passed. > - Tier1 - tier3 passed. Hi @coleenp, Could you please take a look? ------------- PR Comment: https://git.openjdk.org/jdk/pull/26863#issuecomment-3206937011
