| /* |
| * Copyright (c) 2006, 2010, 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_CI_CIMETHODBLOCKS_HPP |
| #define SHARE_VM_CI_CIMETHODBLOCKS_HPP |
| |
| #include "ci/ciMethod.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| |
| class ciBlock; |
| |
| typedef short ciBlockIndex; |
| |
| class ciMethodBlocks : public ResourceObj { |
| private: |
| ciMethod *_method; |
| Arena *_arena; |
| GrowableArray<ciBlock *> *_blocks; |
| ciBlock **_bci_to_block; |
| int _num_blocks; |
| int _code_size; |
| |
| void do_analysis(); |
| public: |
| ciMethodBlocks(Arena *arena, ciMethod *meth); |
| |
| ciBlock *block_containing(int bci); |
| ciBlock *block(int index) { return _blocks->at(index); } |
| ciBlock *make_block_at(int bci); |
| ciBlock *split_block_at(int bci); |
| bool is_block_start(int bci); |
| int num_blocks() { return _num_blocks;} |
| void clear_processed(); |
| |
| ciBlock *make_dummy_block(); // a block not associated with a bci |
| |
| #ifndef PRODUCT |
| void dump(); |
| #endif |
| }; |
| |
| class ciBlock : public ResourceObj { |
| private: |
| int _idx; |
| int _start_bci; |
| int _limit_bci; |
| int _control_bci; |
| uint _flags; |
| int _ex_start_bci; |
| int _ex_limit_bci; |
| #ifndef PRODUCT |
| ciMethod *_method; |
| #endif |
| enum { |
| Processed = (1 << 0), |
| Handler = (1 << 1), |
| MayThrow = (1 << 2), |
| DoesJsr = (1 << 3), |
| DoesRet = (1 << 4), |
| RetTarget = (1 << 5), |
| HasHandler = (1 << 6) |
| }; |
| |
| |
| public: |
| enum { |
| fall_through_bci = -1 |
| }; |
| |
| ciBlock(ciMethod *method, int index, int start_bci); |
| int start_bci() const { return _start_bci; } |
| int limit_bci() const { return _limit_bci; } |
| int control_bci() const { return _control_bci; } |
| int index() const { return _idx; } |
| void set_start_bci(int bci) { _start_bci = bci; } |
| void set_limit_bci(int bci) { _limit_bci = bci; } |
| void set_control_bci(int bci) { _control_bci = bci;} |
| void set_exception_range(int start_bci, int limit_bci); |
| int ex_start_bci() const { return _ex_start_bci; } |
| int ex_limit_bci() const { return _ex_limit_bci; } |
| bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); } |
| |
| // flag handling |
| bool processed() const { return (_flags & Processed) != 0; } |
| bool is_handler() const { return (_flags & Handler) != 0; } |
| bool may_throw() const { return (_flags & MayThrow) != 0; } |
| bool does_jsr() const { return (_flags & DoesJsr) != 0; } |
| bool does_ret() const { return (_flags & DoesRet) != 0; } |
| bool has_handler() const { return (_flags & HasHandler) != 0; } |
| bool is_ret_target() const { return (_flags & RetTarget) != 0; } |
| void set_processed() { _flags |= Processed; } |
| void clear_processed() { _flags &= ~Processed; } |
| void set_handler() { _flags |= Handler; } |
| void set_may_throw() { _flags |= MayThrow; } |
| void set_does_jsr() { _flags |= DoesJsr; } |
| void clear_does_jsr() { _flags &= ~DoesJsr; } |
| void set_does_ret() { _flags |= DoesRet; } |
| void clear_does_ret() { _flags &= ~DoesRet; } |
| void set_is_ret_target() { _flags |= RetTarget; } |
| void set_has_handler() { _flags |= HasHandler; } |
| void clear_exception_handler() { _flags &= ~Handler; _ex_start_bci = -1; _ex_limit_bci = -1; } |
| #ifndef PRODUCT |
| ciMethod *method() const { return _method; } |
| void dump(); |
| void print_on(outputStream* st) const PRODUCT_RETURN; |
| #endif |
| }; |
| |
| #endif // SHARE_VM_CI_CIMETHODBLOCKS_HPP |