To help illustrate a bit, here's a snippit of the code to create the allocator. It succeeds, but the allocator later throws NoClassDefFoundError.
https://gist.github.com/headius/cce750221cf73df76cb7f7ce92c1a759 - Charlie On Fri, Jun 29, 2018 at 8:00 PM, Charles Oliver Nutter <head...@headius.com> wrote: > Hello folks! > > I'm improving JRuby's support for instance variables-as-fields, which > involves generating a new JVM class with a field per instance variable in > the Ruby class. > > The construction process for these classes involves an implementation of > my "ObjectAllocator" interface, which is stored with the Ruby class. > > Previously, the generated classes also included a generated child class > that implenented ObjectAllocator appropriately. I was hoping to use > LambdaMetafactory to avoid generating that class, but I'm running into a > problem. > > Say we have a Ruby class with three instance variables. JRuby will > generate a "RubyObject3" class that holds those variables in their own > fields var0, var1, and var2. The process leading up to the bug goes like > this: > > * Generate the RubyObject3 class, in its own classloader that's a child of > the current one. > * Acquire a constructor handle for that class. > * Use that constructor with LambdaMetafactory.metafactory to produce an > allocator-creating call site. > * Invoke that call site to get the one allocator instance we need. > > Note that since the metafactory call requires a Lookup, I am providing it > one from the parent classloader. > > I am able to get through this process without error. However, when I > finally invoke the allocator, I get a NoClassDefFoundError and a stack > trace that ends at the allocator call. > > So...what am I doing wrong? > > - Charlie >
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