diff -r ad578adff5df -r 5b673a9fa682 hotspot/src/share/vm/gc/g1/g1Allocator.hpp --- a/hotspot/src/share/vm/gc/g1/g1Allocator.hpp Thu Feb 23 15:59:14 2017 -0500 +++ b/hotspot/src/share/vm/gc/g1/g1Allocator.hpp Wed Dec 07 13:51:20 2016 +0100 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -312,12 +312,19 @@ virtual void waste(size_t& wasted, size_t& undo_wasted); }; +// G1ArchiveRegionMap is a boolean array used to mark G1 regions as +// archive regions. This allows a quick check for whether an object +// should not be marked because it is in an archive region. +class G1ArchiveRegionMap : public G1BiasedMappedArray { +protected: + bool default_value() const { return false; } +}; + // G1ArchiveAllocator is used to allocate memory in archive // regions. Such regions are not modifiable by GC, being neither // scavenged nor compacted, or even marked in the object header. // They can contain no pointers to non-archive heap regions, class G1ArchiveAllocator : public CHeapObj { - protected: G1CollectedHeap* _g1h; @@ -378,6 +385,24 @@ _summary_bytes_used = 0; } + // Create the _archive_region_map which is used to identify archive objects. + static inline void enable_archive_object_check(); + + // Set the regions containing the specified address range as archive/non-archive. + static inline void set_range_archive(MemRegion range, bool is_archive); + + static inline bool is_archive_object(oop object); + +private: + static bool _archive_check_enabled; + static G1ArchiveRegionMap _archive_region_map; + + // Check if an object is in an archive region using the _archive_region_map. + static inline bool in_archive_range(oop object); + + // Check if archive object checking is enabled, to avoid calling in_archive_range + // unnecessarily. + static inline bool archive_check_enabled(); }; #endif // SHARE_VM_GC_G1_G1ALLOCATOR_HPP