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src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp@8c95980d0b66 (annotated)
src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp
Sat, 07 Nov 2020 10:30:02 +0800
- author
- aoqi
- date
- Sat, 07 Nov 2020 10:30:02 +0800
- changeset 10026
- 8c95980d0b66
- parent 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP |
| aoqi@0 | 26 | #define CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | private: |
| aoqi@0 | 29 | volatile int _flags; |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | public: |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | enum pd_Constants { |
| aoqi@0 | 34 | flushed = 1 // winodows have flushed |
| aoqi@0 | 35 | }; |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | int flags(void) { return _flags; } |
| aoqi@0 | 38 | void set_flags(int flags) { _flags = flags; } |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | static ByteSize flags_offset() { return byte_offset_of(JavaFrameAnchor, _flags); } |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | // Each arch must define clear, copy |
| aoqi@0 | 43 | // These are used by objects that only care about: |
| aoqi@0 | 44 | // 1 - initializing a new state (thread creation, javaCalls) |
| aoqi@0 | 45 | // 2 - saving a current state (javaCalls) |
| aoqi@0 | 46 | // 3 - restoring an old state (javaCalls) |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | void clear(void) { |
| aoqi@0 | 49 | // clearing _last_Java_sp must be first |
| aoqi@0 | 50 | _last_Java_sp = NULL; |
| aoqi@0 | 51 | // fence? |
| aoqi@0 | 52 | _flags = 0; |
| aoqi@0 | 53 | _last_Java_pc = NULL; |
| aoqi@0 | 54 | } |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | void copy(JavaFrameAnchor* src) { |
| aoqi@0 | 57 | // In order to make sure the transition state is valid for "this" |
| aoqi@0 | 58 | // We must clear _last_Java_sp before copying the rest of the new data |
| aoqi@0 | 59 | // |
| aoqi@0 | 60 | // Hack Alert: Temporary bugfix for 4717480/4721647 |
| aoqi@0 | 61 | // To act like previous version (pd_cache_state) don't NULL _last_Java_sp |
| aoqi@0 | 62 | // unless the value is changing |
| aoqi@0 | 63 | // |
| aoqi@0 | 64 | if (_last_Java_sp != src->_last_Java_sp) |
| aoqi@0 | 65 | _last_Java_sp = NULL; |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | _flags = src->_flags; |
| aoqi@0 | 68 | _last_Java_pc = src->_last_Java_pc; |
| aoqi@0 | 69 | // Must be last so profiler will always see valid frame if has_last_frame() is true |
| aoqi@0 | 70 | _last_Java_sp = src->_last_Java_sp; |
| aoqi@0 | 71 | } |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | // Is stack walkable |
| aoqi@0 | 74 | inline bool walkable( void) { |
| aoqi@0 | 75 | return _flags & flushed; |
| aoqi@0 | 76 | } |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | void make_walkable(JavaThread* thread); |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | address last_Java_pc(void) { return _last_Java_pc; } |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | // These are only used by friends |
| aoqi@0 | 85 | private: |
| aoqi@0 | 86 | |
| aoqi@0 | 87 | intptr_t* last_Java_sp() const { |
| aoqi@0 | 88 | // _last_Java_sp will always be a an unbiased stack pointer |
| aoqi@0 | 89 | // if is is biased then some setter screwed up. This is |
| aoqi@0 | 90 | // deadly. |
| aoqi@0 | 91 | #ifdef _LP64 |
| aoqi@0 | 92 | assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp"); |
| aoqi@0 | 93 | #endif |
| aoqi@0 | 94 | return _last_Java_sp; |
| aoqi@0 | 95 | } |
| aoqi@0 | 96 | |
| aoqi@0 | 97 | void capture_last_Java_pc(intptr_t* sp); |
| aoqi@0 | 98 | |
| aoqi@0 | 99 | void set_window_flushed( void) { |
| aoqi@0 | 100 | _flags |= flushed; |
| aoqi@0 | 101 | OrderAccess::fence(); |
| aoqi@0 | 102 | } |
| aoqi@0 | 103 | |
| aoqi@0 | 104 | #endif // CPU_SPARC_VM_JAVAFRAMEANCHOR_SPARC_HPP |
