Summary: Ergonomics now also takes available virtual memory into account when deciding for a heap size. The helper method to determine the maximum allocatable memory block now uses the appropriate OS specific calls to retrieve available virtual memory for the java process. In 32 bit environments this method now also searches for the maximum actually reservable amount of memory. Merge previously separate implementations for Linux/BSD/Solaris into a single method.
Reviewed-by: jmasa, tamao

Summary: Keep a counter of how many times we were stalled by the GC locker, add a diagnostic flag which sets the limit.
Reviewed-by: brutisso, ehelin, johnc

Reviewed-by: mgerdin, stefank

Reviewed-by: jcoomes

Reviewed-by: jmasa, stefank

Summary: added guarantee() to print_entry_on()
Reviewed-by: kvn

Summary: added guarantee() to pd_address_in_code()
Reviewed-by: kvn

Summary: Enforce MaxMetaspaceSize for both metaspace parts, check MaxMetaspaceSize against "reserved", not "capacity"
Reviewed-by: jmasa, johnc

Reviewed-by: kvn, jcoomes

Summary: Remove the related assertions becasue they do not hold here.
Reviewed-by: jmasa, tschatzl
Contributed-by: Ntamao <tao.mao@oracle.com>

Summary: add guarantee() to insert_pre_post_loops()
Reviewed-by: kvn

Summary: add guarantee() to disqualify_method()
Reviewed-by: kvn

Summary: add guarantee() to get_instance_klass_for_declared_method_holder()
Reviewed-by: kvn

Summary: add guarantee() to set_to_interpreted()
Reviewed-by: kvn

Summary: add guarantee() checks
Reviewed-by: kvn

Summary: add guarantee() checks to merge_state_into_bb()
Reviewed-by: kvn

Summary: added missing parenthesis
Reviewed-by: jrose

Summary: If the marking stack overflows while the marking tasks are draining the SATB buffers, remark will exit with some SATB buffers left unprocessed. Relax the guarantee to allow for overflow.
Reviewed-by: jmasa, brutisso

Summary: add NULL checks for compiler name
Reviewed-by: twisti, kvn

Summary: add guarantee() to DoScheduling()
Reviewed-by: twisti, kvn

Reviewed-by: sla, coleenp, kmo
Contributed-by: yunda.mly@taobao.com

Reviewed-by: coleenp, sla
Contributed-by: yunda.mly@taobao.com

Reviewed-by: kvn, stefank, rbackman, twisti
Contributed-by: niclas.adlertz@oracle.com

Summary: Skip reference processing if the global marking stack overflows during remark. Refactor and rename set_phase(); move code that sets the concurrency level into its own routine. Do not call set_phase() from within parallel reference processing; use the concurrency level routine instead. The marking state should only set reset by CMTask[0] during the concurrent phase of the marking cycle; if an overflow occurs at any stage during the remark, the marking state will be reset after reference processing.
Reviewed-by: brutisso, jmasa

Reviewed-by: twisti, collins, bobv, jwilhelm

Summary: In CMTask::do_marking_step(), Skip offering termination and entering the first and second synchronization barriers if called from a serial context, i.e. the VM thread.
Reviewed-by: brutisso, tschatzl

Summary: support for strings that have same life-time as code that uses them.
Reviewed-by: kvn, twisti

Reviewed-by: kvn, vlivanov