RFR (S): 8154172: C1: NPE is thrown instead of linkage error when invoking nonexistent method
vladimir.x.ivanov at oracle.com
Wed Apr 13 16:01:52 UTC 2016
C1 unconditionally inserts null check before doing a call, even if it
throws an error during linkage. It contradicts JVMS which requires that
linking errors precede run-time errors.
The fix is to detect non-resolvable cases and avoid null checks /
profiling altogether letting the runtime to throw a linkage error.
Testing: regression test, JPRT, RBT (pit-hs-comp.js + jck).
- klass->is_loaded() && !target->is_loaded() is true when method
- static vs non-static checks aren't needed because
stream()->get_method already returns unloaded method in such case;
More information about the hotspot-compiler-dev