JDK-6812587 : Use auxv to determine SPARC hardware features on Solaris
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs15
  • Priority: P5
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2009-03-03
  • Updated: 2014-05-23
  • Resolved: 2011-03-08
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JDK 6 JDK 7 Other
6u18Fixed 7Fixed hs15Fixed
Related Reports
Relates :  
VM_Version::platform_features() in vm_version_solaris_sparc.cpp uses sysinfo(SI_ISALIST, ...) to determine hardware features.  Unfortunately it not possible to find out all instruction set extensions like popc, which is required for 6378821.

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/6af0a709d52b

EVALUATION It seems that the auxv file is not trustworthy on systems where getisax(2) is not supported. We will use getisax(2) on systems where it's available (Solaris 10 or later) and the old legacy code for all other systems.

EVALUATION A similar function to getisax(2) should be used to determine all possible instruction set extensions.