hg: jdk/submit: 8230765: Implement nmethod barrier for x86_32 platforms

[zgu at redhat.com]

Changeset: 02a1d512e188
Author:    zgu
Date:      2019-09-09 11:43 -0400
URL:       https://hg.openjdk.java.net/jdk/submit/rev/02a1d512e188

8230765: Implement nmethod barrier for x86_32 platforms

! src/hotspot/cpu/x86/gc/shared/barrierSetAssembler_x86.cpp
! src/hotspot/cpu/x86/gc/shared/barrierSetNMethod_x86.cpp
! src/hotspot/cpu/x86/sharedRuntime_x86_32.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_32.cpp
! src/hotspot/cpu/x86/stubRoutines_x86.hpp
! src/hotspot/cpu/x86/stubRoutines_x86_32.cpp
! src/hotspot/share/gc/shared/barrierSetNMethod.hpp
! src/hotspot/share/gc/z/zBarrierSetNMethod.cpp
! src/hotspot/share/gc/z/zBarrierSetNMethod.hpp