JDK-6812721 : Block's frequency should not be NaN
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: hs15
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: solaris_10
  • CPU: sparc
  • Submitted: 2009-03-04
  • Updated: 2010-04-03
  • Resolved: 2009-03-18
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JDK 6 JDK 7 Other
6u14Fixed 7Fixed hs14Fixed
Related Reports
Relates :  
JDK-6784930 - server jvm fails with assert(!n->is_SpillCopy(),"") in -Xcomp mode with fastdebug bits
Description
Calculated block's frequency could be NaN which can cause all kind of problems in Register_Allocate and PhaseBlockLayout phases.
Specifically we hit  SEGV with HS14 VM on Solaris 8 in qsort() because edge_order() method returns incorrect value
for a block with NaN frequency.
Comments
EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/19f25e603e7b
04-03-2009
EVALUATION See description.
04-03-2009