Merge

8011898: gc/TestVerifyBeforeGCDuringStartup.java: java.lang.RuntimeException: '[Verifying' missing from stdout/stderr: [Error: Could not find or load main class] Summary: System.getProperty("test.java.opts") can return NULL, which gets converted to to the empty string, and the child java command then interprets that as the name of the main class. Reviewed-by: jmasa, brutisso

8013160: NPG: Remove unnecessary mark stack draining after CodeCache::do_unloading Reviewed-by: coleenp, mgerdin

8012915: ReservedSpace::align_reserved_region() broken on Windows Summary: remove unused constructors and helper methods for ReservedHeapSpace and ReservedSpace Reviewed-by: mgerdin, jmasa, johnc, tschatzl

8013132: Add a flag to turn off the output of the verbose verification code Reviewed-by: johnc, brutisso

8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t Summary: In graphKit INT operations were generated to access PtrQueue::_index which has type size_t. This is 64 bit on 64-bit machines. No problems occur on little endian machines as long as the index fits into 32 bit, but on big endian machines the upper part is read, which is zero. This leads to unnecessary branches to the slow path in the runtime. Reviewed-by: twisti, johnc Contributed-by: Martin Doerr <martin.doerr@sap.com>

8013136: NPG: Parallel class loading tests fail after fix for JDK-8011802 Summary: Move initialization of dependencies to before allocation of CLD Reviewed-by: stefank, coleenp

8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions Reviewed-by: mgerdin, coleenp

8011724: G1: Stack allocate instances of HeapRegionRemSetIterator Summary: Stack allocate instances of HeapRegionRemSetIterator during RSet scanning. Reviewed-by: brutisso, jwilhelm

8011802: NPG: init_dependencies in class loader data graph can cause invalid CLD Summary: Restructure initialization of ClassLoaderData to not add a new instance if init_dependencies fail Reviewed-by: stefank, coleenp