Missing page size in verbose output on AIX

[AlenBadel]

Using the option -verbose:sizes should print out all available page sizes configured on the system for both the codecache and objectheap.

On AIX, the verbose output which lists the available page sizes that the codecache can use is missing the default page size of 64K. This happens even when verbose output verifies that it has committed to use 64K pages as the default page size.

To reproduce, run java -verbose:sizes -version
The output depends on what pages are configured on your system, but if you have 16M pages configured it will look something like the output below.

17:49:29    -Xlp:objectheap:pagesize=64K	 large page size
17:49:29                    available large page sizes:
17:49:29                    4K
17:49:29                    64K    
17:49:29                    16M
17:49:29    -Xlp:codecache:pagesize=64K	 large page size for JIT code cache
17:49:29                    available large page sizes for JIT code cache:
17:49:29                    4K
17:49:29                    16M .     

We can see that 64K is listed in the available large pages on the objectheap portion, but is not included on the codecache portion.

This issue only occurs on OpenJ9 AIX builds.

[AlenBadel]

(Reserved for analysis to follow)