RFR (S) JDK-8025004: -XX:+CheckUnhandledOops asserts for JDK 8 solaris sparc fastdebug binaries

[Lois Foltan]

Please review the following fix:

Webrev:
     http://cr.openjdk.java.net/~coleenp/bug_jdk8025004/

Bug: -XX:+CheckUnhandledOops asserts for JDK 8 solaris sparc fastdebug 
binaries
     https://bugs.openjdk.java.net/browse/JDK-8025004

Summary of fix:
     This fix is to work around a Solaris Studio C++ 12u1 & 12u3 
compiler bug. Basically in fastdebug builds
     on Solaris, CHECK_UNHANDLED_OOPs is defined causing an oop to be 
defined as a class instead of a oopDesc *.
     Code within oops/instanceKlass.cpp defines several stack local 
variables as "volatile oop init_lock". Solaris Studio C++
     compilers erroneously call the oop's destructor twice for the 
volatile oop upon exit from the code segment
     within the member functions. Remove the keyword "volatile" from all 
"init_lock" stack local variables defined
     within oops/instanceKlass.cpp. This bug has been reported to the 
Solaris Studio C++ compiler team.

Tests:
     JTREG, vm.quick.testlist on Solaris with -XX:+CheckUnhandledOops 
specified

Thank you, Lois