On Tue, 24 Jan 2023 00:16:10 GMT, Alex Menkov <amen...@openjdk.org> wrote:
> classFileParser drops stack map frames for JDK classes (when verification is > not required). > As a result JvmtiClassFileReconstituter cannot restore the attribute for > class redefinition. > Note that if the class is in CDS archive, the frames are restored from CDS, > so this issue affects only JDK classes which are not in CDS. > This code is old (from "initial load") and I don't understand the reason it > was implemented this way. > > Testing: tier1-tier6 The StackMapTable attribute was introduced to support the new split-verifier by JSR-202. As it is only needed for verification it is elided if verification is not required. Looking at this issue it seems to me that ASM is incorrect to always expect/require that a StackMapTable be present as that is not a requirement of the VM spec. ------------- PR: https://git.openjdk.org/jdk/pull/12155
