Re: Working around NoClassDefFound
Thanks Remi, that makes sense. My call paths don't have too many types (4 or 5 maybe) so this might be worth exploring. I assume this includes any handles to cast back to those types. Hmm...an idea is forming. I will try to play with this later this week. - Charlie (mobile) On Jul 4, 2012 3:59 AM, "Rémi Forax" wrote: > On 07/04/2012 03:01 AM, Mark Roos wrote: > > From Charlie > > > > It also doesn't appear to happen with JRuby on the boot > > classpath...it happens only when JRuby is loaded in a child > > classloader. > > > > That was my experience as well. The only way I found to avoid it was to > > put my code into the bootClassPath. I messed with other ideas ( but not > > Rémi's) but the error always eventually returned. > > > > regards > > mark > > There is only one workaround to avoid the NoClassDefFound error as far > as I know, > the signature of all invokedynamic calls must not contain any class > which is not in the bootclasspath. > So either you put the runtime classes in the bootclasspath or you erase > all your signature to only use > primitive types and Object. > > cheers, > Rémi > > ___ > mlvm-dev mailing list > mlvm-dev@openjdk.java.net > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev > ___ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
Re: Working around NoClassDefFound
On 07/04/2012 03:01 AM, Mark Roos wrote: > From Charlie > > It also doesn't appear to happen with JRuby on the boot > classpath...it happens only when JRuby is loaded in a child > classloader. > > That was my experience as well. The only way I found to avoid it was to > put my code into the bootClassPath. I messed with other ideas ( but not > Rémi's) but the error always eventually returned. > > regards > mark There is only one workaround to avoid the NoClassDefFound error as far as I know, the signature of all invokedynamic calls must not contain any class which is not in the bootclasspath. So either you put the runtime classes in the bootclasspath or you erase all your signature to only use primitive types and Object. cheers, Rémi ___ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
Re: Working around NoClassDefFound
>From Charlie It also doesn't appear to happen with JRuby on the boot classpath...it happens only when JRuby is loaded in a child classloader. That was my experience as well. The only way I found to avoid it was to put my code into the bootClassPath. I messed with other ideas ( but not Rémi's) but the error always eventually returned. regards mark___ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
Working around NoClassDefFound
Ok folks...last I heard from Christian the new indy backend is not going to make u6, so I'm actively seeking workarounds for the dreaded NoClassDefFoundError. I believe Remi suggested something like erasing the types in the MH tree and then re-casting them or something, but I can't find the thread. I have fixed some instances of it by making sure I generate jitted Ruby code into isolated classloaders rather than ever sharing the code across classloaders, but it's not a good general solution. I don't have an easy reproduction yet. Since it only happens when indy jits, and since I only use indy once Ruby code jits, it's a bit unpredictable. It also doesn't appear to happen with JRuby on the boot classpath...it happens only when JRuby is loaded in a child classloader. So...has anyone found a way to work around NCDFE? - Charlie ___ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
