RFR(xs): 8065788: os::reserve_memory() on Windows should not assert that allocation size is aligned to OS allocation granularity.

[Thomas Stüfe]

Hi,

a very small change:

Bug Report: https://bugs.openjdk.java.net/browse/JDK-8065788
WebRev:     http://cr.openjdk.java.net/~simonis/webrevs/8065788/

os::reserve_memory() on Windows asserts that allocation size is allocated
to os::vm_allocation_granularity(). This assert is wrong and should be
removed.

Allocation granularity affects the alignment of attach addresses, not of
the allocated size. The latter is aligned to page size, but asserting that
would be unnecessarily strict, as VirtualAlloc() will just quietly align
size up to page size.

For details see MSDN on VirtualAlloc():
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366887%28v=vs.85%29.aspx


Kind Regards,

Thomas Stüfe