1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)cardTableExtension.hpp 1.20 07/05/05 17:05:26 JVM"
3 #endif
4 /*
5 * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
66 HeapWord* space_top,
67 PSPromotionManager* pm,
68 uint stripe_number);
69
70 // Verification
71 static void verify_all_young_refs_imprecise();
72 static void verify_all_young_refs_precise();
73
74 bool addr_is_marked_imprecise(void *addr);
75 bool addr_is_marked_precise(void *addr);
76
77 void set_card_newgen(void* addr) { jbyte* p = byte_for(addr); *p = verify_card; }
78
79 // Testers for entries
80 static bool card_is_dirty(int value) { return value == dirty_card; }
81 static bool card_is_newgen(int value) { return value == youngergen_card; }
82 static bool card_is_clean(int value) { return value == clean_card; }
83 static bool card_is_verify(int value) { return value == verify_card; }
84
85 // Card marking
86 void inline_write_ref_field_gc(oop* field, oop new_val) {
87 jbyte* byte = byte_for(field);
88 *byte = youngergen_card;
89 }
90
91 // Adaptive size policy support
92 // Allows adjustment of the base and size of the covered regions
93 void resize_covered_region(MemRegion new_region);
94 // Finds the covered region to resize based on the start address
95 // of the covered regions.
96 void resize_covered_region_by_start(MemRegion new_region);
97 // Finds the covered region to resize based on the end address
98 // of the covered regions.
99 void resize_covered_region_by_end(int changed_region, MemRegion new_region);
100 // Finds the lowest start address of a covered region that is
101 // previous (i.e., lower index) to the covered region with index "ind".
102 HeapWord* lowest_prev_committed_start(int ind) const;
103
104 #ifdef ASSERT
105
106 bool is_valid_card_address(jbyte* addr) {
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1 #ifdef USE_PRAGMA_IDENT_HDR
2 #pragma ident "@(#)cardTableExtension.hpp 1.20 07/05/05 17:05:26 JVM"
3 #endif
4 /*
5 * Copyright 2001-2008 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
66 HeapWord* space_top,
67 PSPromotionManager* pm,
68 uint stripe_number);
69
70 // Verification
71 static void verify_all_young_refs_imprecise();
72 static void verify_all_young_refs_precise();
73
74 bool addr_is_marked_imprecise(void *addr);
75 bool addr_is_marked_precise(void *addr);
76
77 void set_card_newgen(void* addr) { jbyte* p = byte_for(addr); *p = verify_card; }
78
79 // Testers for entries
80 static bool card_is_dirty(int value) { return value == dirty_card; }
81 static bool card_is_newgen(int value) { return value == youngergen_card; }
82 static bool card_is_clean(int value) { return value == clean_card; }
83 static bool card_is_verify(int value) { return value == verify_card; }
84
85 // Card marking
86 void inline_write_ref_field_gc(void* field, oop new_val) {
87 jbyte* byte = byte_for(field);
88 *byte = youngergen_card;
89 }
90
91 // Adaptive size policy support
92 // Allows adjustment of the base and size of the covered regions
93 void resize_covered_region(MemRegion new_region);
94 // Finds the covered region to resize based on the start address
95 // of the covered regions.
96 void resize_covered_region_by_start(MemRegion new_region);
97 // Finds the covered region to resize based on the end address
98 // of the covered regions.
99 void resize_covered_region_by_end(int changed_region, MemRegion new_region);
100 // Finds the lowest start address of a covered region that is
101 // previous (i.e., lower index) to the covered region with index "ind".
102 HeapWord* lowest_prev_committed_start(int ind) const;
103
104 #ifdef ASSERT
105
106 bool is_valid_card_address(jbyte* addr) {
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