ciMethodBlocks.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2006, 2008, 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 26class ciBlock; 27 28typedef short ciBlockIndex; 29 30class ciMethodBlocks : public ResourceObj { 31private: 32 ciMethod *_method; 33 Arena *_arena; 34 GrowableArray<ciBlock *> *_blocks; 35 ciBlock **_bci_to_block; 36 int _num_blocks; 37 int _code_size; 38 39 void do_analysis(); 40public: 41 ciMethodBlocks(Arena *arena, ciMethod *meth); 42 43 ciBlock *block_containing(int bci); 44 ciBlock *block(int index) { return _blocks->at(index); } 45 ciBlock *make_block_at(int bci); 46 ciBlock *split_block_at(int bci); 47 bool is_block_start(int bci); 48 int num_blocks() { return _num_blocks;} 49 void clear_processed(); 50 51 ciBlock *make_dummy_block(); // a block not associated with a bci 52 53#ifndef PRODUCT 54 void dump(); 55#endif 56}; 57 58class ciBlock : public ResourceObj { 59private: 60 int _idx; 61 int _start_bci; 62 int _limit_bci; 63 int _control_bci; 64 uint _flags; 65 int _ex_start_bci; 66 int _ex_limit_bci; 67#ifndef PRODUCT 68 ciMethod *_method; 69#endif 70 enum { 71 Processed = (1 << 0), 72 Handler = (1 << 1), 73 MayThrow = (1 << 2), 74 DoesJsr = (1 << 3), 75 DoesRet = (1 << 4), 76 RetTarget = (1 << 5), 77 HasHandler = (1 << 6) 78 }; 79 80 81public: 82 enum { 83 fall_through_bci = -1 84 }; 85 86 ciBlock(ciMethod *method, int index, int start_bci); 87 int start_bci() const { return _start_bci; } 88 int limit_bci() const { return _limit_bci; } 89 int control_bci() const { return _control_bci; } 90 int index() const { return _idx; } 91 void set_start_bci(int bci) { _start_bci = bci; } 92 void set_limit_bci(int bci) { _limit_bci = bci; } 93 void set_control_bci(int bci) { _control_bci = bci;} 94 void set_exception_range(int start_bci, int limit_bci); 95 int ex_start_bci() const { return _ex_start_bci; } 96 int ex_limit_bci() const { return _ex_limit_bci; } 97 bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); } 98 99 // flag handling 100 bool processed() const { return (_flags & Processed) != 0; } 101 bool is_handler() const { return (_flags & Handler) != 0; } 102 bool may_throw() const { return (_flags & MayThrow) != 0; } 103 bool does_jsr() const { return (_flags & DoesJsr) != 0; } 104 bool does_ret() const { return (_flags & DoesRet) != 0; } 105 bool has_handler() const { return (_flags & HasHandler) != 0; } 106 bool is_ret_target() const { return (_flags & RetTarget) != 0; } 107 void set_processed() { _flags |= Processed; } 108 void clear_processed() { _flags &= ~Processed; } 109 void set_handler() { _flags |= Handler; } 110 void set_may_throw() { _flags |= MayThrow; } 111 void set_does_jsr() { _flags |= DoesJsr; } 112 void clear_does_jsr() { _flags &= ~DoesJsr; } 113 void set_does_ret() { _flags |= DoesRet; } 114 void clear_does_ret() { _flags &= ~DoesRet; } 115 void set_is_ret_target() { _flags |= RetTarget; } 116 void set_has_handler() { _flags |= HasHandler; } 117 void clear_exception_handler() { _flags &= ~Handler; _ex_start_bci = -1; _ex_limit_bci = -1; } 118#ifndef PRODUCT 119 ciMethod *method() const { return _method; } 120 void dump(); 121 void print_on(outputStream* st) const PRODUCT_RETURN; 122#endif 123}; 124