Reviewed-by: kvn, sla

Reviewed-by: jcoomes

Summary: Zero Symbol* for constant pool strings to indicate pseudo_strings (objects that aren't strings).  Clean up JVM_CONSTANT_Object and unused flags.
Reviewed-by: sspitsyn, jrose

Reviewed-by: coleenp, mgronlun

Summary: Added NULL pointer check for arena size record
Reviewed-by: sspitsyn, dholmes

Summary: report_vm_out_of_memory() should allow VMError.report_and_die() to handle multiple out of native memory errors.
Reviewed-by: dcubed, dholmes, coleenp, acorn
Contributed-by: ron.durbin@oracle.com

Summary: Add regression test for crash seen in 8005875. Test is run with G1 and PGCT=0 and issues "jcmd <pid> Thread.print" against itself. Without the fix for 8005875 the test will crash.
Reviewed-by: brutisso

Summary: Delete the questionable source code because it is for no-longer supported versions of Linux.
Reviewed-by: mikael, coleenp

Summary: Regression test for 8000311. Verifies that PLABStats works with zero parallel GC threads.
Reviewed-by: jmasa, johnc
Contributed-by: NFilipp Zhinkin <filipp.zhinkin@oracle.com>

Summary: Modify WhiteBoxAPI to use interface classes from test/testlibrary instead, add ClassFileInstaller to resolve the boot class path issue
Reviewed-by: ctornqvi, dsamersoff, coleenp, kvn

Summary: Adds code to HotSpot to properly update MethodParameter attributes' constant pool indexes when redefineClasses is called
Reviewed-by: coleenp, sspitsyn

Summary: Save errno before processing signal, then restore it.
Reviewed-by: acorn, sspitsyn

Summary: Added few checks and early bailout from Superword optimization to avoid such cases in a future.
Reviewed-by: roland, twisti

Summary: Strip lines matching the performance warning from the output before diff.
Reviewed-by: kvn

Summary: Added an explicit timeouts.
Reviewed-by: kvn, twisti

Reviewed-by: dholmes, rbackman

Reviewed-by: dholmes, mikael

Summary: use expensive node logic for other more math nodes.
Reviewed-by: kvn

Reviewed-by: jcoomes

Reviewed-by: dholmes, rbackman

Summary: This is a fix of an initialization mistake for class AdaptiveSizePolicy.
Reviewed-by: jmasa
Contributed-by: NTao Mao <tao.mao@oracle.com>