131 lines
4.8 KiB
C++
131 lines
4.8 KiB
C++
/*
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* Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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# include "incls/_precompiled.incl"
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# include "incls/_constMethodOop.cpp.incl"
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// Static initialization
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const u2 constMethodOopDesc::MAX_IDNUM = 0xFFFE;
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const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF;
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// How big must this constMethodObject be?
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int constMethodOopDesc::object_size(int code_size,
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int compressed_line_number_size,
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int local_variable_table_length,
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int checked_exceptions_length) {
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int extra_bytes = code_size;
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if (compressed_line_number_size > 0) {
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extra_bytes += compressed_line_number_size;
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}
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if (checked_exceptions_length > 0) {
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extra_bytes += sizeof(u2);
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extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement);
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}
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if (local_variable_table_length > 0) {
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extra_bytes += sizeof(u2);
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extra_bytes +=
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local_variable_table_length * sizeof(LocalVariableTableElement);
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}
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int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
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return align_object_size(header_size() + extra_words);
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}
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// linenumber table - note that length is unknown until decompression,
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// see class CompressedLineNumberReadStream.
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u_char* constMethodOopDesc::compressed_linenumber_table() const {
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// Located immediately following the bytecodes.
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assert(has_linenumber_table(), "called only if table is present");
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return code_end();
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}
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u2* constMethodOopDesc::checked_exceptions_length_addr() const {
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// Located at the end of the constMethod.
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assert(has_checked_exceptions(), "called only if table is present");
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return last_u2_element();
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}
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u2* constMethodOopDesc::localvariable_table_length_addr() const {
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assert(has_localvariable_table(), "called only if table is present");
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if (has_checked_exceptions()) {
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// If checked_exception present, locate immediately before them.
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return (u2*) checked_exceptions_start() - 1;
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} else {
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// Else, the linenumber table is at the end of the constMethod.
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return last_u2_element();
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}
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}
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// Update the flags to indicate the presence of these optional fields.
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void constMethodOopDesc::set_inlined_tables_length(
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int checked_exceptions_len,
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int compressed_line_number_size,
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int localvariable_table_len) {
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// Must be done in the order below, otherwise length_addr accessors
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// will not work. Only set bit in header if length is positive.
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assert(_flags == 0, "Error");
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if (compressed_line_number_size > 0) {
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_flags |= _has_linenumber_table;
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}
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if (checked_exceptions_len > 0) {
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_flags |= _has_checked_exceptions;
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*(checked_exceptions_length_addr()) = checked_exceptions_len;
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}
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if (localvariable_table_len > 0) {
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_flags |= _has_localvariable_table;
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*(localvariable_table_length_addr()) = localvariable_table_len;
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}
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}
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int constMethodOopDesc::checked_exceptions_length() const {
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return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0;
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}
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CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const {
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u2* addr = checked_exceptions_length_addr();
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u2 length = *addr;
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assert(length > 0, "should only be called if table is present");
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addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2);
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return (CheckedExceptionElement*) addr;
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}
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int constMethodOopDesc::localvariable_table_length() const {
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return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0;
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}
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LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const {
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u2* addr = localvariable_table_length_addr();
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u2 length = *addr;
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assert(length > 0, "should only be called if table is present");
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addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2);
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return (LocalVariableTableElement*) addr;
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}
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