Mercurial > hg > truffle
annotate src/cpu/sparc/vm/registerMap_sparc.hpp @ 20304:a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
| author | tschatzl |
|---|---|
| date | Mon, 21 Jul 2014 10:00:31 +0200 |
| parents | cba7b5c2d53f |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef CPU_SPARC_VM_REGISTERMAP_SPARC_HPP |
| 26 #define CPU_SPARC_VM_REGISTERMAP_SPARC_HPP | |
| 27 | |
| 0 | 28 // machine-dependent implemention for register maps |
| 29 friend class frame; | |
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30 friend class MethodHandles; |
| 0 | 31 |
| 32 private: | |
| 33 intptr_t* _window; // register window save area (for L and I regs) | |
| 34 intptr_t* _younger_window; // previous save area (for O regs, if needed) | |
| 35 | |
| 36 address pd_location(VMReg reg) const; | |
| 37 void pd_clear(); | |
| 38 void pd_initialize_from(const RegisterMap* map) { | |
| 39 _window = map->_window; | |
| 40 _younger_window = map->_younger_window; | |
| 41 _location_valid[0] = 0; // avoid the shift_individual_registers game | |
| 42 } | |
| 43 void pd_initialize() { | |
| 44 _window = NULL; | |
| 45 _younger_window = NULL; | |
| 46 _location_valid[0] = 0; // avoid the shift_individual_registers game | |
| 47 } | |
| 48 void shift_window(intptr_t* sp, intptr_t* younger_sp) { | |
| 49 _window = sp; | |
| 50 _younger_window = younger_sp; | |
| 51 // Throw away locations for %i, %o, and %l registers: | |
| 52 // But do not throw away %g register locs. | |
| 53 if (_location_valid[0] != 0) shift_individual_registers(); | |
| 54 } | |
| 55 void shift_individual_registers(); | |
| 56 // When popping out of compiled frames, we make all IRegs disappear. | |
| 57 void make_integer_regs_unsaved() { _location_valid[0] = 0; } | |
| 1972 | 58 |
| 59 #endif // CPU_SPARC_VM_REGISTERMAP_SPARC_HPP |