| /* |
| * Copyright 2003-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| # include "incls/_precompiled.incl" |
| # include "incls/_constMethodOop.cpp.incl" |
| |
| // Static initialization |
| const u2 constMethodOopDesc::MAX_IDNUM = 0xFFFE; |
| const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF; |
| |
| // How big must this constMethodObject be? |
| |
| int constMethodOopDesc::object_size(int code_size, |
| int compressed_line_number_size, |
| int local_variable_table_length, |
| int checked_exceptions_length) { |
| int extra_bytes = code_size; |
| if (compressed_line_number_size > 0) { |
| extra_bytes += compressed_line_number_size; |
| } |
| if (checked_exceptions_length > 0) { |
| extra_bytes += sizeof(u2); |
| extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement); |
| } |
| if (local_variable_table_length > 0) { |
| extra_bytes += sizeof(u2); |
| extra_bytes += |
| local_variable_table_length * sizeof(LocalVariableTableElement); |
| } |
| int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; |
| return align_object_size(header_size() + extra_words); |
| } |
| |
| |
| // linenumber table - note that length is unknown until decompression, |
| // see class CompressedLineNumberReadStream. |
| |
| u_char* constMethodOopDesc::compressed_linenumber_table() const { |
| // Located immediately following the bytecodes. |
| assert(has_linenumber_table(), "called only if table is present"); |
| return code_end(); |
| } |
| |
| u2* constMethodOopDesc::checked_exceptions_length_addr() const { |
| // Located at the end of the constMethod. |
| assert(has_checked_exceptions(), "called only if table is present"); |
| return last_u2_element(); |
| } |
| |
| u2* constMethodOopDesc::localvariable_table_length_addr() const { |
| assert(has_localvariable_table(), "called only if table is present"); |
| if (has_checked_exceptions()) { |
| // If checked_exception present, locate immediately before them. |
| return (u2*) checked_exceptions_start() - 1; |
| } else { |
| // Else, the linenumber table is at the end of the constMethod. |
| return last_u2_element(); |
| } |
| } |
| |
| |
| // Update the flags to indicate the presence of these optional fields. |
| void constMethodOopDesc::set_inlined_tables_length( |
| int checked_exceptions_len, |
| int compressed_line_number_size, |
| int localvariable_table_len) { |
| // Must be done in the order below, otherwise length_addr accessors |
| // will not work. Only set bit in header if length is positive. |
| assert(_flags == 0, "Error"); |
| if (compressed_line_number_size > 0) { |
| _flags |= _has_linenumber_table; |
| } |
| if (checked_exceptions_len > 0) { |
| _flags |= _has_checked_exceptions; |
| *(checked_exceptions_length_addr()) = checked_exceptions_len; |
| } |
| if (localvariable_table_len > 0) { |
| _flags |= _has_localvariable_table; |
| *(localvariable_table_length_addr()) = localvariable_table_len; |
| } |
| } |
| |
| |
| int constMethodOopDesc::checked_exceptions_length() const { |
| return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; |
| } |
| |
| |
| CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const { |
| u2* addr = checked_exceptions_length_addr(); |
| u2 length = *addr; |
| assert(length > 0, "should only be called if table is present"); |
| addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); |
| return (CheckedExceptionElement*) addr; |
| } |
| |
| |
| int constMethodOopDesc::localvariable_table_length() const { |
| return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; |
| } |
| |
| |
| LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const { |
| u2* addr = localvariable_table_length_addr(); |
| u2 length = *addr; |
| assert(length > 0, "should only be called if table is present"); |
| addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); |
| return (LocalVariableTableElement*) addr; |
| } |