--- a/hotspot/src/share/vm/runtime/virtualspace.hpp Mon Apr 27 09:02:41 2015 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,222 +0,0 @@
-/*
- * Copyright (c) 1997, 2015, 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
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifndef SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
-#define SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
-
-#include "memory/allocation.hpp"
-
-// ReservedSpace is a data structure for reserving a contiguous address range.
-
-class ReservedSpace VALUE_OBJ_CLASS_SPEC {
- friend class VMStructs;
- protected:
- char* _base;
- size_t _size;
- size_t _noaccess_prefix;
- size_t _alignment;
- bool _special;
- private:
- bool _executable;
-
- // ReservedSpace
- ReservedSpace(char* base, size_t size, size_t alignment, bool special,
- bool executable);
- protected:
- void initialize(size_t size, size_t alignment, bool large,
- char* requested_address,
- bool executable);
-
- public:
- // Constructor
- ReservedSpace();
- // Initialize the reserved space with the given size. If preferred_page_size
- // is set, use this as minimum page size/alignment. This may waste some space
- // if the given size is not aligned to that value, as the reservation will be
- // aligned up to the final alignment in this case.
- ReservedSpace(size_t size, size_t preferred_page_size = 0);
- ReservedSpace(size_t size, size_t alignment, bool large,
- char* requested_address = NULL);
- ReservedSpace(size_t size, size_t alignment, bool large, bool executable);
-
- // Accessors
- char* base() const { return _base; }
- size_t size() const { return _size; }
- size_t alignment() const { return _alignment; }
- bool special() const { return _special; }
- bool executable() const { return _executable; }
- size_t noaccess_prefix() const { return _noaccess_prefix; }
- bool is_reserved() const { return _base != NULL; }
- void release();
-
- // Splitting
- ReservedSpace first_part(size_t partition_size, size_t alignment,
- bool split = false, bool realloc = true);
- ReservedSpace last_part (size_t partition_size, size_t alignment);
-
- // These simply call the above using the default alignment.
- inline ReservedSpace first_part(size_t partition_size,
- bool split = false, bool realloc = true);
- inline ReservedSpace last_part (size_t partition_size);
-
- // Alignment
- static size_t page_align_size_up(size_t size);
- static size_t page_align_size_down(size_t size);
- static size_t allocation_align_size_up(size_t size);
- static size_t allocation_align_size_down(size_t size);
-};
-
-ReservedSpace
-ReservedSpace::first_part(size_t partition_size, bool split, bool realloc)
-{
- return first_part(partition_size, alignment(), split, realloc);
-}
-
-ReservedSpace ReservedSpace::last_part(size_t partition_size)
-{
- return last_part(partition_size, alignment());
-}
-
-// Class encapsulating behavior specific of memory space reserved for Java heap.
-class ReservedHeapSpace : public ReservedSpace {
- private:
- void try_reserve_heap(size_t size, size_t alignment, bool large,
- char *requested_address);
- void try_reserve_range(char *highest_start, char *lowest_start,
- size_t attach_point_alignment, char *aligned_HBMA,
- char *upper_bound, size_t size, size_t alignment, bool large);
- void initialize_compressed_heap(const size_t size, size_t alignment, bool large);
- // Create protection page at the beginning of the space.
- void establish_noaccess_prefix();
- public:
- // Constructor. Tries to find a heap that is good for compressed oops.
- ReservedHeapSpace(size_t size, size_t forced_base_alignment, bool large);
- // Returns the base to be used for compression, i.e. so that null can be
- // encoded safely and implicit null checks can work.
- char *compressed_oop_base() { return _base - _noaccess_prefix; }
-};
-
-// Class encapsulating behavior specific memory space for Code
-class ReservedCodeSpace : public ReservedSpace {
- public:
- // Constructor
- ReservedCodeSpace(size_t r_size, size_t rs_align, bool large);
-};
-
-// VirtualSpace is data structure for committing a previously reserved address range in smaller chunks.
-
-class VirtualSpace VALUE_OBJ_CLASS_SPEC {
- friend class VMStructs;
- private:
- // Reserved area
- char* _low_boundary;
- char* _high_boundary;
-
- // Committed area
- char* _low;
- char* _high;
-
- // The entire space has been committed and pinned in memory, no
- // os::commit_memory() or os::uncommit_memory().
- bool _special;
-
- // Need to know if commit should be executable.
- bool _executable;
-
- // MPSS Support
- // Each virtualspace region has a lower, middle, and upper region.
- // Each region has an end boundary and a high pointer which is the
- // high water mark for the last allocated byte.
- // The lower and upper unaligned to LargePageSizeInBytes uses default page.
- // size. The middle region uses large page size.
- char* _lower_high;
- char* _middle_high;
- char* _upper_high;
-
- char* _lower_high_boundary;
- char* _middle_high_boundary;
- char* _upper_high_boundary;
-
- size_t _lower_alignment;
- size_t _middle_alignment;
- size_t _upper_alignment;
-
- // MPSS Accessors
- char* lower_high() const { return _lower_high; }
- char* middle_high() const { return _middle_high; }
- char* upper_high() const { return _upper_high; }
-
- char* lower_high_boundary() const { return _lower_high_boundary; }
- char* middle_high_boundary() const { return _middle_high_boundary; }
- char* upper_high_boundary() const { return _upper_high_boundary; }
-
- size_t lower_alignment() const { return _lower_alignment; }
- size_t middle_alignment() const { return _middle_alignment; }
- size_t upper_alignment() const { return _upper_alignment; }
-
- public:
- // Committed area
- char* low() const { return _low; }
- char* high() const { return _high; }
-
- // Reserved area
- char* low_boundary() const { return _low_boundary; }
- char* high_boundary() const { return _high_boundary; }
-
- bool special() const { return _special; }
-
- public:
- // Initialization
- VirtualSpace();
- bool initialize_with_granularity(ReservedSpace rs, size_t committed_byte_size, size_t max_commit_ganularity);
- bool initialize(ReservedSpace rs, size_t committed_byte_size);
-
- // Destruction
- ~VirtualSpace();
-
- // Reserved memory
- size_t reserved_size() const;
- // Actually committed OS memory
- size_t actual_committed_size() const;
- // Memory used/expanded in this virtual space
- size_t committed_size() const;
- // Memory left to use/expand in this virtual space
- size_t uncommitted_size() const;
-
- bool contains(const void* p) const;
-
- // Operations
- // returns true on success, false otherwise
- bool expand_by(size_t bytes, bool pre_touch = false);
- void shrink_by(size_t bytes);
- void release();
-
- void check_for_contiguity() PRODUCT_RETURN;
-
- // Debugging
- void print_on(outputStream* out) PRODUCT_RETURN;
- void print();
-};
-
-#endif // SHARE_VM_RUNTIME_VIRTUALSPACE_HPP