Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/code/pcDesc.hpp
src/share/vm/code/pcDesc.hpp
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
equal
deleted
inserted
replaced
| -1:000000000000 | 0:f90c822e73f8 |
|---|---|
| 1 /* | |
| 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. | |
| 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 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_CODE_PCDESC_HPP | |
| 26 #define SHARE_VM_CODE_PCDESC_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 | |
| 30 // PcDescs map a physical PC (given as offset from start of nmethod) to | |
| 31 // the corresponding source scope and byte code index. | |
| 32 | |
| 33 class nmethod; | |
| 34 | |
| 35 class PcDesc VALUE_OBJ_CLASS_SPEC { | |
| 36 friend class VMStructs; | |
| 37 private: | |
| 38 int _pc_offset; // offset from start of nmethod | |
| 39 int _scope_decode_offset; // offset for scope in nmethod | |
| 40 int _obj_decode_offset; | |
| 41 | |
| 42 enum { | |
| 43 PCDESC_reexecute = 1 << 0, | |
| 44 PCDESC_is_method_handle_invoke = 1 << 1, | |
| 45 PCDESC_return_oop = 1 << 2 | |
| 46 }; | |
| 47 | |
| 48 int _flags; | |
| 49 | |
| 50 void set_flag(int mask, bool z) { | |
| 51 _flags = z ? (_flags | mask) : (_flags & ~mask); | |
| 52 } | |
| 53 | |
| 54 public: | |
| 55 int pc_offset() const { return _pc_offset; } | |
| 56 int scope_decode_offset() const { return _scope_decode_offset; } | |
| 57 int obj_decode_offset() const { return _obj_decode_offset; } | |
| 58 | |
| 59 void set_pc_offset(int x) { _pc_offset = x; } | |
| 60 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } | |
| 61 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } | |
| 62 | |
| 63 // Constructor (only used for static in nmethod.cpp) | |
| 64 // Also used by ScopeDesc::sender()] | |
| 65 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); | |
| 66 | |
| 67 enum { | |
| 68 // upper and lower exclusive limits real offsets: | |
| 69 lower_offset_limit = -1, | |
| 70 upper_offset_limit = (unsigned int)-1 >> 1 | |
| 71 }; | |
| 72 | |
| 73 // Flags | |
| 74 bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; } | |
| 75 void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); } | |
| 76 | |
| 77 // Does pd refer to the same information as pd? | |
| 78 bool is_same_info(const PcDesc* pd) { | |
| 79 return _scope_decode_offset == pd->_scope_decode_offset && | |
| 80 _obj_decode_offset == pd->_obj_decode_offset && | |
| 81 _flags == pd->_flags; | |
| 82 } | |
| 83 | |
| 84 bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; } | |
| 85 void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); } | |
| 86 | |
| 87 bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; } | |
| 88 void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); } | |
| 89 | |
| 90 // Returns the real pc | |
| 91 address real_pc(const nmethod* code) const; | |
| 92 | |
| 93 void print(nmethod* code); | |
| 94 bool verify(nmethod* code); | |
| 95 }; | |
| 96 | |
| 97 #endif // SHARE_VM_CODE_PCDESC_HPP |
