Mercurial > jdk8-mips64-public > hotspot / annotate
src/cpu/x86/vm/javaFrameAnchor_x86.hpp@f90c822e73f8 (annotated)
src/cpu/x86/vm/javaFrameAnchor_x86.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| 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_X86_VM_JAVAFRAMEANCHOR_X86_HPP |
| aoqi@0 | 26 | #define CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | private: |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | // FP value associated with _last_Java_sp: |
| aoqi@0 | 31 | intptr_t* volatile _last_Java_fp; // pointer is volatile not what it points to |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | public: |
| aoqi@0 | 34 | // Each arch must define reset, save, restore |
| aoqi@0 | 35 | // These are used by objects that only care about: |
| aoqi@0 | 36 | // 1 - initializing a new state (thread creation, javaCalls) |
| aoqi@0 | 37 | // 2 - saving a current state (javaCalls) |
| aoqi@0 | 38 | // 3 - restoring an old state (javaCalls) |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | void clear(void) { |
| aoqi@0 | 41 | // clearing _last_Java_sp must be first |
| aoqi@0 | 42 | _last_Java_sp = NULL; |
| aoqi@0 | 43 | // fence? |
| aoqi@0 | 44 | _last_Java_fp = NULL; |
| aoqi@0 | 45 | _last_Java_pc = NULL; |
| aoqi@0 | 46 | } |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | void copy(JavaFrameAnchor* src) { |
| aoqi@0 | 49 | // In order to make sure the transition state is valid for "this" |
| aoqi@0 | 50 | // We must clear _last_Java_sp before copying the rest of the new data |
| aoqi@0 | 51 | // |
| aoqi@0 | 52 | // Hack Alert: Temporary bugfix for 4717480/4721647 |
| aoqi@0 | 53 | // To act like previous version (pd_cache_state) don't NULL _last_Java_sp |
| aoqi@0 | 54 | // unless the value is changing |
| aoqi@0 | 55 | // |
| aoqi@0 | 56 | if (_last_Java_sp != src->_last_Java_sp) |
| aoqi@0 | 57 | _last_Java_sp = NULL; |
| aoqi@0 | 58 | |
| aoqi@0 | 59 | _last_Java_fp = src->_last_Java_fp; |
| aoqi@0 | 60 | _last_Java_pc = src->_last_Java_pc; |
| aoqi@0 | 61 | // Must be last so profiler will always see valid frame if has_last_frame() is true |
| aoqi@0 | 62 | _last_Java_sp = src->_last_Java_sp; |
| aoqi@0 | 63 | } |
| aoqi@0 | 64 | |
| aoqi@0 | 65 | // Always walkable |
| aoqi@0 | 66 | bool walkable(void) { return true; } |
| aoqi@0 | 67 | // Never any thing to do since we are always walkable and can find address of return addresses |
| aoqi@0 | 68 | void make_walkable(JavaThread* thread) { } |
| aoqi@0 | 69 | |
| aoqi@0 | 70 | intptr_t* last_Java_sp(void) const { return _last_Java_sp; } |
| aoqi@0 | 71 | |
| aoqi@0 | 72 | address last_Java_pc(void) { return _last_Java_pc; } |
| aoqi@0 | 73 | |
| aoqi@0 | 74 | private: |
| aoqi@0 | 75 | |
| aoqi@0 | 76 | static ByteSize last_Java_fp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_fp); } |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | public: |
| aoqi@0 | 79 | |
| aoqi@0 | 80 | void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | intptr_t* last_Java_fp(void) { return _last_Java_fp; } |
| aoqi@0 | 83 | // Assert (last_Java_sp == NULL || fp == NULL) |
| aoqi@0 | 84 | void set_last_Java_fp(intptr_t* fp) { _last_Java_fp = fp; } |
| aoqi@0 | 85 | |
| aoqi@0 | 86 | #endif // CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP |
