1 /* 2 * Copyright (c) 2018, 2019, 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_OOPS_METHOD_INLINE_HPP 26 #define SHARE_OOPS_METHOD_INLINE_HPP 27 28 #include "oops/method.hpp" 29 #include "runtime/orderAccess.hpp" 30 31 inline address Method::from_compiled_entry() const { 32 return OrderAccess::load_acquire(&_from_compiled_entry); 33 } 34 35 inline address Method::from_interpreted_entry() const { 36 return OrderAccess::load_acquire(&_from_interpreted_entry); 37 } 38 39 inline void Method::set_method_data(MethodData* data) { 40 // The store into method must be released. On platforms without 41 // total store order (TSO) the reference may become visible before 42 // the initialization of data otherwise. 43 OrderAccess::release_store(&_method_data, data); 44 } 45 46 inline CompiledMethod* volatile Method::code() const { 47 assert( check_code(), "" ); 48 return OrderAccess::load_acquire(&_code); 49 } 50 51 // Write (bci, line number) pair to stream 52 inline void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) { 53 // bci and line number does not compress into single byte. 54 // Write out escape character and use regular compression for bci and line number. 55 write_byte((jubyte)0xFF); 56 write_signed_int(bci_delta); 57 write_signed_int(line_delta); 58 } 59 60 inline void CompressedLineNumberWriteStream::write_pair_inline(int bci, int line) { 61 int bci_delta = bci - _bci; 62 int line_delta = line - _line; 63 _bci = bci; 64 _line = line; 65 // Skip (0,0) deltas - they do not add information and conflict with terminator. 66 if (bci_delta == 0 && line_delta == 0) return; 67 // Check if bci is 5-bit and line number 3-bit unsigned. 68 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) { 69 // Compress into single byte. 70 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta; 71 // Check that value doesn't match escape character. 72 if (value != 0xFF) { 73 write_byte(value); 74 return; 75 } 76 } 77 write_pair_regular(bci_delta, line_delta); 78 } 79 80 inline void CompressedLineNumberWriteStream::write_pair(int bci, int line) { 81 write_pair_inline(bci, line); 82 } 83 84 inline bool Method::has_compiled_code() const { return code() != NULL; } 85 86 #endif // SHARE_OOPS_METHOD_INLINE_HPP