Merge

7146729: nightly failure after 7141200: tty is sometimes null during shutdown of main thread Reviewed-by: kvn

7145346: VerifyStackAtCalls is broken Summary: Replace call_epilog() encoding with macroassembler use. Moved duplicated code to x86.ad. Fixed return_addr() definition. Reviewed-by: never

7144318: GCLocker assert failure: assert(_needs_gc || SafepointSynchronize::is_at_safepoint( Reviewed-by: kvn, twisti

7143038: SIGSEGV in assert_equal / LinearScan::assign_reg_num Summary: forced exit may destory global objects that are still in use. Reviewed-by: twisti, never, kvn

7125136: SIGILL on linux amd64 in gc/ArrayJuggle/Juggle29 Summary: For C2 moved saving EBP after ESP adjustment. For C1 generated 5 byte nop instruction first if needed. Reviewed-by: never, twisti, azeemj

7142680: default GC affected by jvm path Summary: Removed old tiered code Reviewed-by: never, kvn

7145345: Code cache sweeper must cooperate with safepoints Summary: Safepoint in the sweeper loop in necessary Reviewed-by: kvn, never

7145537: minor tweaks to LogEvents Reviewed-by: kvn, twisti

7126041: jdk7u4 b05 and b06 crash with RubyMine 3.2.4, works well with b04 Summary: Goto that replaces a If mistaken to be a back branch and triggers erroneous OSR compilation. Reviewed-by: never, iveresov

7143061: nsk/stress/stack/b4525850 crash VM Reviewed-by: kvn, twisti

7144405: JumbleGC002 assert(m->offset() == pc_offset) failed: oopmap not found Summary: oop map needs pc stored in frame anchor in StubGenerator::generate_throw_exception() Reviewed-by: twisti, never, kvn

7143766: add ALT_JDK_IMAGE_DIR and improve test_jdk Reviewed-by: rbackman, jrose, dholmes

7141329: Strange values of stack_size in -XX:+TraceMethodHandles output Reviewed-by: kvn, never

7140985: HSDIS does not handle caller options correctly Summary: Fix typo. Reviewed-by: jrose, kvn Contributed-by: Andrew Haley <aph@redhat.com>