Review request (6204603 new Solaris mmap semantics for class data archive file)

[Steve Bohne]

Thanks for any reviews.

Fixed 6204603: Modify hotspot to use new Solaris mmap semantics for
class data archive file

http://web-east.east/~sbohne/webrev/6204603

Modify Solaris os::attempt_reserve_memory_at() to pass an address hint
to mmap when reserving memory for the shared archive.  Previously we
used successive anonymous mmap calls to "zero in" on the correct region.
Since snv_84 (see 5003415) Solaris will attempt to honor the address
hint.  If the new call fails, we simply fall back to the old method.

Reviewed by:

Fix verified (y/n): y

Verification testing:
   java -client -Xshare:on -XX:+PrintMiscellaneous -XX:+Verbose -version
     (fastdebug, Solaris SPARC + x86)

Other testing:
   NSK vm.quick -client Solaris SPARC + x86
   JPRT


Thanks,
Steve

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