JDK-8240831 : [JVMCI] Export missing vmStructs entries used by JVMCI compilers
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 11,15
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2020-03-10
  • Updated: 2020-06-04
  • Resolved: 2020-03-12
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

To download the current JDK release, click here.
JDK 11 JDK 15
11.0.8-oracleFixed 15 b15Fixed
Description
There are several constants, fields used by Graal that are not exported in jvmci/vmStructs_jvmci.cpp. On the Graal end, these entries are optional but will disable various optimization, and hence lead to performance degradation. 
Comments
URL: https://hg.openjdk.java.net/jdk/jdk/rev/2d4a9ff1de2e User: dnsimon Date: 2020-03-12 12:21:39 +0000
12-03-2020

ILW = Performance regression due to missing vmStruct exports through JVMCI, with Graal as JIT, no workaround = MMH = P3
11-03-2020