Merge

8005857: assert in GC_locker from PSOldGen::expand with -XX:+PrintGCDetails and Verbose Summary: Use GC_locker::is_active_and_needs_gc() instead of GC_locker::is_active() for providing information about the reason of heap expansion. Reviewed-by: jmasa, johnc

8009408: gc/metaspace/ClassMetaspaceSizeInJmapHeap.java fails with "exit code 1" Reviewed-by: brutisso, sla, ctornqvi

8010463: G1: Crashes with -UseTLAB and heap verification Summary: Some parts of the G1 heap can only be walked during a safepoint. Skip verifying these parts of the heap when verifying during JVM startup. Reviewed-by: brutisso, tschatzl

7112912: Message "Error occurred during initialization of VM" on boxes with lots of RAM 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

7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine 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

Merge