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Bug ID: 6812587 Use auxv to determine SPARC hardware features on Solaris
6812587 : Use auxv to determine SPARC hardware features on Solaris

Details
Type:
Enhancement
Submit Date:
2009-03-03
Status:
Closed
Updated Date:
2011-03-08
Project Name:
JDK
Resolved Date:
2011-03-08
Component:
hotspot
OS:
generic
Sub-Component:
compiler
CPU:
generic
Priority:
P5
Resolution:
Fixed
Affected Versions:
hs15
Fixed Versions:
hs15

Related Reports
Backport:
JDK-2175227 - Use auxv to determine SPARC hardware features on Solaris
Backport:
JDK-2180551 - Use auxv to determine SPARC hardware features on Solaris

Sub Tasks

Description
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.

Comments
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/6af0a709d52b
2009-03-11 
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.
2009-03-10 
EVALUATION

A similar function to getisax(2) should be used to determine all possible instruction set extensions.
2009-03-03


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