11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
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/shared/blockOffsetTable.inline.hpp"
27 #include "gc/shared/collectedHeap.inline.hpp"
28 #include "gc/shared/space.inline.hpp"
29 #include "memory/iterator.hpp"
30 #include "memory/universe.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/java.hpp"
33 #include "services/memTracker.hpp"
34
35 //////////////////////////////////////////////////////////////////////
36 // BlockOffsetSharedArray
37 //////////////////////////////////////////////////////////////////////
38
39 BlockOffsetSharedArray::BlockOffsetSharedArray(MemRegion reserved,
40 size_t init_word_size):
41 _reserved(reserved), _end(NULL)
42 {
43 size_t size = compute_size(reserved.word_size());
44 ReservedSpace rs(size);
45 if (!rs.is_reserved()) {
46 vm_exit_during_initialization("Could not reserve enough space for heap offset array");
47 }
48
49 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
50
51 if (!_vs.initialize(rs, 0)) {
52 vm_exit_during_initialization("Could not reserve enough space for heap offset array");
53 }
54 _offset_array = (u_char*)_vs.low_boundary();
55 resize(init_word_size);
56 if (TraceBlockOffsetTable) {
57 gclog_or_tty->print_cr("BlockOffsetSharedArray::BlockOffsetSharedArray: ");
58 gclog_or_tty->print_cr(" "
59 " rs.base(): " INTPTR_FORMAT
60 " rs.size(): " INTPTR_FORMAT
61 " rs end(): " INTPTR_FORMAT,
62 p2i(rs.base()), rs.size(), p2i(rs.base() + rs.size()));
63 gclog_or_tty->print_cr(" "
64 " _vs.low_boundary(): " INTPTR_FORMAT
65 " _vs.high_boundary(): " INTPTR_FORMAT,
66 p2i(_vs.low_boundary()),
67 p2i(_vs.high_boundary()));
68 }
69 }
70
71 void BlockOffsetSharedArray::resize(size_t new_word_size) {
72 assert(new_word_size <= _reserved.word_size(), "Resize larger than reserved");
73 size_t new_size = compute_size(new_word_size);
74 size_t old_size = _vs.committed_size();
75 size_t delta;
76 char* high = _vs.high();
77 _end = _reserved.start() + new_word_size;
78 if (new_size > old_size) {
79 delta = ReservedSpace::page_align_size_up(new_size - old_size);
80 assert(delta > 0, "just checking");
81 if (!_vs.expand_by(delta)) {
82 // Do better than this for Merlin
83 vm_exit_out_of_memory(delta, OOM_MMAP_ERROR, "offset table expansion");
84 }
85 assert(_vs.high() == high + delta, "invalid expansion");
86 } else {
87 delta = ReservedSpace::page_align_size_down(old_size - new_size);
88 if (delta == 0) return;
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
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/shared/blockOffsetTable.inline.hpp"
27 #include "gc/shared/collectedHeap.inline.hpp"
28 #include "gc/shared/space.inline.hpp"
29 #include "memory/iterator.hpp"
30 #include "memory/universe.hpp"
31 #include "logging/log.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "runtime/java.hpp"
34 #include "services/memTracker.hpp"
35
36 //////////////////////////////////////////////////////////////////////
37 // BlockOffsetSharedArray
38 //////////////////////////////////////////////////////////////////////
39
40 BlockOffsetSharedArray::BlockOffsetSharedArray(MemRegion reserved,
41 size_t init_word_size):
42 _reserved(reserved), _end(NULL)
43 {
44 size_t size = compute_size(reserved.word_size());
45 ReservedSpace rs(size);
46 if (!rs.is_reserved()) {
47 vm_exit_during_initialization("Could not reserve enough space for heap offset array");
48 }
49
50 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC);
51
52 if (!_vs.initialize(rs, 0)) {
53 vm_exit_during_initialization("Could not reserve enough space for heap offset array");
54 }
55 _offset_array = (u_char*)_vs.low_boundary();
56 resize(init_word_size);
57 log_trace(gc, bot)("BlockOffsetSharedArray::BlockOffsetSharedArray: ");
58 log_trace(gc, bot)(" rs.base(): " INTPTR_FORMAT " rs.size(): " INTPTR_FORMAT " rs end(): " INTPTR_FORMAT,
59 p2i(rs.base()), rs.size(), p2i(rs.base() + rs.size()));
60 log_trace(gc, bot)(" _vs.low_boundary(): " INTPTR_FORMAT " _vs.high_boundary(): " INTPTR_FORMAT,
61 p2i(_vs.low_boundary()), p2i(_vs.high_boundary()));
62 }
63
64 void BlockOffsetSharedArray::resize(size_t new_word_size) {
65 assert(new_word_size <= _reserved.word_size(), "Resize larger than reserved");
66 size_t new_size = compute_size(new_word_size);
67 size_t old_size = _vs.committed_size();
68 size_t delta;
69 char* high = _vs.high();
70 _end = _reserved.start() + new_word_size;
71 if (new_size > old_size) {
72 delta = ReservedSpace::page_align_size_up(new_size - old_size);
73 assert(delta > 0, "just checking");
74 if (!_vs.expand_by(delta)) {
75 // Do better than this for Merlin
76 vm_exit_out_of_memory(delta, OOM_MMAP_ERROR, "offset table expansion");
77 }
78 assert(_vs.high() == high + delta, "invalid expansion");
79 } else {
80 delta = ReservedSpace::page_align_size_down(old_size - new_size);
81 if (delta == 0) return;
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