Reviewed-by: stefank, tschatzl

Summary: The patch for 8006088 misses regression tests after a merge error, this CR provides them.
Reviewed-by: jwilhelm, tamao, jmasa

Reviewed-by: jcoomes

Summary: Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich.
Reviewed-by: tschatzl, jmasa

Reviewed-by: mgerdin, johnc, tschatzl

8013032: CMS: assert(used() == used_after_gc && used_after_gc <= capacity()) failed: used: 0 used_after_gc: 292080 capacity: 1431699456
Reviewed-by: tschatzl, mgerdin, johnc

Summary: Fixed tests to use new way of utilizing the WB API, fixed issue with where custom classloader got the classes from
Reviewed-by: collins, mgerdin, zgu

Summary: Update JNIEXPORT and JNIIMPORT to work with other compilers that don't necessarily have the __attribute__ type qualifier
Reviewed-by: dholmes, dcubed, coleenp

Summary: Replace ifdefs with SUPPORTS_NATIVE_CX8 set in platform include file
Reviewed-by: dholmes, dlong

Reviewed-by: coleenp, mgronlun, rbackman

Reviewed-by: sspitsyn, coleenp

Summary: Fixed broken Zero build.
Reviewed-by: twisti, coleenp, kvn

Summary: Refactored shrink_by() to only use region counts and not byte sizes
Reviewed-by: johnc, tschatzl

Reviewed-by: coleenp, sspitsyn

Summary: Make processing of minimum, initial and maximum heap size more intiutive by removing previous limitations on allowed values, and make error reporting consistent. Further, fix errors in ergonomic heap sizing.
Reviewed-by: johnc, jwilhelm, tamao

8013120: NMT: Kitchensink crashes with assert(next_region == NULL || !next_region->is_committed_region()) failed: Sanity check
Summary: Fixed NMT to deal with releasing virtual memory region when there are still committed regions within it
Reviewed-by: acorn, coleenp

8013648: Guarantee(VerifyBeforeGC || VerifyDuringGC || VerifyBeforeExit || VerifyAfterGC) failed: too expensive
Summary: Fix code to call correct version of function find_class().
Reviewed-by: coleenp, rdurbin, dcubed

Summary: Make sure max alignemnt is at least as large as min alignment
Reviewed-by: johnc, jmasa, tschatzl

Reviewed-by: jcoomes

Reviewed-by: acorn, sla

Reviewed-by: mgronlun, rbackman, kvn