| /* |
| * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_CODE_PCDESC_HPP |
| #define SHARE_VM_CODE_PCDESC_HPP |
| |
| #include "memory/allocation.hpp" |
| |
| // PcDescs map a physical PC (given as offset from start of nmethod) to |
| // the corresponding source scope and byte code index. |
| |
| class CompiledMethod; |
| |
| class PcDesc VALUE_OBJ_CLASS_SPEC { |
| friend class VMStructs; |
| private: |
| int _pc_offset; // offset from start of nmethod |
| int _scope_decode_offset; // offset for scope in nmethod |
| int _obj_decode_offset; |
| |
| enum { |
| PCDESC_reexecute = 1 << 0, |
| PCDESC_is_method_handle_invoke = 1 << 1, |
| PCDESC_return_oop = 1 << 2, |
| PCDESC_rethrow_exception = 1 << 3 |
| }; |
| |
| int _flags; |
| |
| void set_flag(int mask, bool z) { |
| _flags = z ? (_flags | mask) : (_flags & ~mask); |
| } |
| |
| public: |
| int pc_offset() const { return _pc_offset; } |
| int scope_decode_offset() const { return _scope_decode_offset; } |
| int obj_decode_offset() const { return _obj_decode_offset; } |
| |
| void set_pc_offset(int x) { _pc_offset = x; } |
| void set_scope_decode_offset(int x) { _scope_decode_offset = x; } |
| void set_obj_decode_offset(int x) { _obj_decode_offset = x; } |
| |
| // Constructor (only used for static in nmethod.cpp) |
| // Also used by ScopeDesc::sender()] |
| PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); |
| |
| enum { |
| // upper and lower exclusive limits real offsets: |
| lower_offset_limit = -1, |
| upper_offset_limit = (unsigned int)-1 >> 1 |
| }; |
| |
| // Flags |
| bool rethrow_exception() const { return (_flags & PCDESC_rethrow_exception) != 0; } |
| void set_rethrow_exception(bool z) { set_flag(PCDESC_rethrow_exception, z); } |
| bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; } |
| void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); } |
| |
| // Does pd refer to the same information as pd? |
| bool is_same_info(const PcDesc* pd) { |
| return _scope_decode_offset == pd->_scope_decode_offset && |
| _obj_decode_offset == pd->_obj_decode_offset && |
| _flags == pd->_flags; |
| } |
| |
| bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; } |
| void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); } |
| |
| bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; } |
| void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); } |
| |
| // Returns the real pc |
| address real_pc(const CompiledMethod* code) const; |
| |
| void print(CompiledMethod* code); |
| bool verify(CompiledMethod* code); |
| }; |
| |
| #endif // SHARE_VM_CODE_PCDESC_HPP |