src/hotspot/os_cpu/linux_x86/gc/z/zPhysicalMemoryBacking_linux_x86.cpp

*** 235,270 ****
    // From an NMT point of view we treat the first heap mapping (marked0) as committed
    return ZAddress::marked0(offset);
  }
  
  void ZPhysicalMemoryBacking::map(ZPhysicalMemory pmem, uintptr_t offset) const {
!   if (ZUnmapBadViews) {
!     // Only map the good view, for debugging only
      map_view(pmem, ZAddress::good(offset), AlwaysPreTouch);
    } else {
      // Map all views
      map_view(pmem, ZAddress::marked0(offset), AlwaysPreTouch);
      map_view(pmem, ZAddress::marked1(offset), AlwaysPreTouch);
      map_view(pmem, ZAddress::remapped(offset), AlwaysPreTouch);
    }
  }
  
  void ZPhysicalMemoryBacking::unmap(ZPhysicalMemory pmem, uintptr_t offset) const {
!   if (ZUnmapBadViews) {
!     // Only map the good view, for debugging only
      unmap_view(pmem, ZAddress::good(offset));
    } else {
      // Unmap all views
      unmap_view(pmem, ZAddress::marked0(offset));
      unmap_view(pmem, ZAddress::marked1(offset));
      unmap_view(pmem, ZAddress::remapped(offset));
    }
  }
  
! void ZPhysicalMemoryBacking::flip(ZPhysicalMemory pmem, uintptr_t offset) const {
!   assert(ZUnmapBadViews, "Should be enabled");
!   const uintptr_t addr_good = ZAddress::good(offset);
!   const uintptr_t addr_bad = ZAddress::is_marked(ZAddressGoodMask) ? ZAddress::remapped(offset) : ZAddress::marked(offset);
!   // Map/Unmap views
!   map_view(pmem, addr_good, false /* pretouch */);
!   unmap_view(pmem, addr_bad);
  }
--- 235,273 ----
    // From an NMT point of view we treat the first heap mapping (marked0) as committed
    return ZAddress::marked0(offset);
  }
  
  void ZPhysicalMemoryBacking::map(ZPhysicalMemory pmem, uintptr_t offset) const {
!   if (ZVerifyViews) {
!     // Map good view
      map_view(pmem, ZAddress::good(offset), AlwaysPreTouch);
    } else {
      // Map all views
      map_view(pmem, ZAddress::marked0(offset), AlwaysPreTouch);
      map_view(pmem, ZAddress::marked1(offset), AlwaysPreTouch);
      map_view(pmem, ZAddress::remapped(offset), AlwaysPreTouch);
    }
  }
  
  void ZPhysicalMemoryBacking::unmap(ZPhysicalMemory pmem, uintptr_t offset) const {
!   if (ZVerifyViews) {
!     // Unmap good view
      unmap_view(pmem, ZAddress::good(offset));
    } else {
      // Unmap all views
      unmap_view(pmem, ZAddress::marked0(offset));
      unmap_view(pmem, ZAddress::marked1(offset));
      unmap_view(pmem, ZAddress::remapped(offset));
    }
  }
  
! void ZPhysicalMemoryBacking::debug_map(ZPhysicalMemory pmem, uintptr_t offset) const {
!   // Map good view
!   assert(ZVerifyViews, "Should be enabled");
!   map_view(pmem, ZAddress::good(offset), false /* pretouch */);
! }
! 
! void ZPhysicalMemoryBacking::debug_unmap(ZPhysicalMemory pmem, uintptr_t offset) const {
!   // Unmap good view
!   assert(ZVerifyViews, "Should be enabled");
!   unmap_view(pmem, ZAddress::good(offset));
  }