Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/code/pcDesc.hpp@f90c822e73f8 (annotated)
src/share/vm/code/pcDesc.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
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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) 1997, 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 SHARE_VM_CODE_PCDESC_HPP |
| aoqi@0 | 26 | #define SHARE_VM_CODE_PCDESC_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "memory/allocation.hpp" |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | // PcDescs map a physical PC (given as offset from start of nmethod) to |
| aoqi@0 | 31 | // the corresponding source scope and byte code index. |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | class nmethod; |
| aoqi@0 | 34 | |
| aoqi@0 | 35 | class PcDesc VALUE_OBJ_CLASS_SPEC { |
| aoqi@0 | 36 | friend class VMStructs; |
| aoqi@0 | 37 | private: |
| aoqi@0 | 38 | int _pc_offset; // offset from start of nmethod |
| aoqi@0 | 39 | int _scope_decode_offset; // offset for scope in nmethod |
| aoqi@0 | 40 | int _obj_decode_offset; |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | enum { |
| aoqi@0 | 43 | PCDESC_reexecute = 1 << 0, |
| aoqi@0 | 44 | PCDESC_is_method_handle_invoke = 1 << 1, |
| aoqi@0 | 45 | PCDESC_return_oop = 1 << 2 |
| aoqi@0 | 46 | }; |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | int _flags; |
| aoqi@0 | 49 | |
| aoqi@0 | 50 | void set_flag(int mask, bool z) { |
| aoqi@0 | 51 | _flags = z ? (_flags | mask) : (_flags & ~mask); |
| aoqi@0 | 52 | } |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | public: |
| aoqi@0 | 55 | int pc_offset() const { return _pc_offset; } |
| aoqi@0 | 56 | int scope_decode_offset() const { return _scope_decode_offset; } |
| aoqi@0 | 57 | int obj_decode_offset() const { return _obj_decode_offset; } |
| aoqi@0 | 58 | |
| aoqi@0 | 59 | void set_pc_offset(int x) { _pc_offset = x; } |
| aoqi@0 | 60 | void set_scope_decode_offset(int x) { _scope_decode_offset = x; } |
| aoqi@0 | 61 | void set_obj_decode_offset(int x) { _obj_decode_offset = x; } |
| aoqi@0 | 62 | |
| aoqi@0 | 63 | // Constructor (only used for static in nmethod.cpp) |
| aoqi@0 | 64 | // Also used by ScopeDesc::sender()] |
| aoqi@0 | 65 | PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | enum { |
| aoqi@0 | 68 | // upper and lower exclusive limits real offsets: |
| aoqi@0 | 69 | lower_offset_limit = -1, |
| aoqi@0 | 70 | upper_offset_limit = (unsigned int)-1 >> 1 |
| aoqi@0 | 71 | }; |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | // Flags |
| aoqi@0 | 74 | bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; } |
| aoqi@0 | 75 | void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); } |
| aoqi@0 | 76 | |
| aoqi@0 | 77 | // Does pd refer to the same information as pd? |
| aoqi@0 | 78 | bool is_same_info(const PcDesc* pd) { |
| aoqi@0 | 79 | return _scope_decode_offset == pd->_scope_decode_offset && |
| aoqi@0 | 80 | _obj_decode_offset == pd->_obj_decode_offset && |
| aoqi@0 | 81 | _flags == pd->_flags; |
| aoqi@0 | 82 | } |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; } |
| aoqi@0 | 85 | void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); } |
| aoqi@0 | 86 | |
| aoqi@0 | 87 | bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; } |
| aoqi@0 | 88 | void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); } |
| aoqi@0 | 89 | |
| aoqi@0 | 90 | // Returns the real pc |
| aoqi@0 | 91 | address real_pc(const nmethod* code) const; |
| aoqi@0 | 92 | |
| aoqi@0 | 93 | void print(nmethod* code); |
| aoqi@0 | 94 | bool verify(nmethod* code); |
| aoqi@0 | 95 | }; |
| aoqi@0 | 96 | |
| aoqi@0 | 97 | #endif // SHARE_VM_CODE_PCDESC_HPP |
