RFR(S) 8181858: [JVMCI] JVMCI should update the trap counters when invalidating for Reason_not_compiled_exception_handler
cthalinger at twitter.com
Tue Aug 22 19:37:13 UTC 2017
Great we got this finally fixed. Thanks.
> On Aug 18, 2017, at 8:40 AM, Tom Rodriguez <tom.rodriguez at oracle.com> wrote:
> JVMCI permits trapping when exception handlers haven't been compiled into the generated code. When this is a normal uncommon trap the counter in the MDO is updated but when the invalidation is forced during exception dispatch the counter isn't updated. This leads to invalidate/recompile cycles that will never terminate because the compiler doesn't know why the previous invalidation happened. Tested with a Graal unit test https://github.com/graalvm/graal/commit/d92dc3f90c0ba1502a9e28a4faf7973ffd9a1889#diff-96a2a5e9fc63d48d47a9ef9722a7c3d9R102.
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