16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/g1PageBasedVirtualSpace.hpp"
27 #include "gc/shared/workgroup.hpp"
28 #include "oops/markOop.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/os.inline.hpp"
32 #include "services/memTracker.hpp"
33 #include "utilities/bitMap.inline.hpp"
34
35 G1PageBasedVirtualSpace::G1PageBasedVirtualSpace(ReservedSpace rs, size_t used_size, size_t page_size) :
36 _low_boundary(NULL), _high_boundary(NULL), _committed(), _page_size(0), _special(false),
37 _dirty(), _executable(false) {
38 initialize_with_page_size(rs, used_size, page_size);
39 }
40
41 void G1PageBasedVirtualSpace::initialize_with_page_size(ReservedSpace rs, size_t used_size, size_t page_size) {
42 guarantee(rs.is_reserved(), "Given reserved space must have been reserved already.");
43
44 vmassert(_low_boundary == NULL, "VirtualSpace already initialized");
45 vmassert(page_size > 0, "Page size must be non-zero.");
46
47 guarantee(is_ptr_aligned(rs.base(), page_size),
48 "Reserved space base " PTR_FORMAT " is not aligned to requested page size " SIZE_FORMAT, p2i(rs.base()), page_size);
49 guarantee(is_size_aligned(used_size, os::vm_page_size()),
50 "Given used reserved space size needs to be OS page size aligned (%d bytes) but is " SIZE_FORMAT, os::vm_page_size(), used_size);
51 guarantee(used_size <= rs.size(),
52 "Used size of reserved space " SIZE_FORMAT " bytes is smaller than reservation at " SIZE_FORMAT " bytes", used_size, rs.size());
53 guarantee(is_size_aligned(rs.size(), page_size),
54 "Expected that the virtual space is size aligned, but " SIZE_FORMAT " is not aligned to page size " SIZE_FORMAT, rs.size(), page_size);
55
56 _low_boundary = rs.base();
57 _high_boundary = _low_boundary + used_size;
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16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/g1PageBasedVirtualSpace.hpp"
27 #include "gc/shared/workgroup.hpp"
28 #include "oops/markOop.hpp"
29 #include "oops/oop.inline.hpp"
30 #include "runtime/atomic.hpp"
31 #include "runtime/os.inline.hpp"
32 #include "services/memTracker.hpp"
33 #include "utilities/bitMap.inline.hpp"
34
35 G1PageBasedVirtualSpace::G1PageBasedVirtualSpace(ReservedSpace rs, size_t used_size, size_t page_size) :
36 _low_boundary(NULL), _high_boundary(NULL), _committed(mtGC), _page_size(0), _special(false),
37 _dirty(mtGC), _executable(false) {
38 initialize_with_page_size(rs, used_size, page_size);
39 }
40
41 void G1PageBasedVirtualSpace::initialize_with_page_size(ReservedSpace rs, size_t used_size, size_t page_size) {
42 guarantee(rs.is_reserved(), "Given reserved space must have been reserved already.");
43
44 vmassert(_low_boundary == NULL, "VirtualSpace already initialized");
45 vmassert(page_size > 0, "Page size must be non-zero.");
46
47 guarantee(is_ptr_aligned(rs.base(), page_size),
48 "Reserved space base " PTR_FORMAT " is not aligned to requested page size " SIZE_FORMAT, p2i(rs.base()), page_size);
49 guarantee(is_size_aligned(used_size, os::vm_page_size()),
50 "Given used reserved space size needs to be OS page size aligned (%d bytes) but is " SIZE_FORMAT, os::vm_page_size(), used_size);
51 guarantee(used_size <= rs.size(),
52 "Used size of reserved space " SIZE_FORMAT " bytes is smaller than reservation at " SIZE_FORMAT " bytes", used_size, rs.size());
53 guarantee(is_size_aligned(rs.size(), page_size),
54 "Expected that the virtual space is size aligned, but " SIZE_FORMAT " is not aligned to page size " SIZE_FORMAT, rs.size(), page_size);
55
56 _low_boundary = rs.base();
57 _high_boundary = _low_boundary + used_size;
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