Need reviewers for changes in JVM initialization code (added check for -XX:StackShadowPages option)

[Pavel Tisnovsky]

Hi all,

can anybody please review two quite simple changes in JVM initialization 
code? Webrev is available at:
http://cr.openjdk.java.net/~ptisnovs/StackShadowPagesCheck/

When -XX:StackShadowPages is set to negative integer or zero value, JVM 
segfaulted on Linux and, according to 
http://bugs.sun.com/view_bug.do?bug_id=6885308, hangs up on Solaris 
(although I only check this issue on Linux)

I also would like to add more check for -XX:StackRedPages, 
-XX:StackShadowPages and -XX:StackYellowPages options to avoid issue 
described in the bug report mentioned above 
(http://bugs.sun.com/view_bug.do?bug_id=6885308) but I'm unable to find 
relevant information about proper conditions (it may depends on page 
sizes, VM stack size etc.). Any ideas?

Cheers
Pavel Tisnovsky