author | jiangli |
Wed, 06 Jun 2012 14:33:43 -0400 | |
changeset 12937 | 0032fb2caff6 |
parent 7397 | 5b173b4ca846 |
child 13282 | 9872915dd78d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "oops/constMethodOop.hpp" |
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#include "oops/methodOop.hpp" |
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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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||
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0032fb2caff6
7172967: Eliminate constMethod's _method backpointer to methodOop.
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parents:
7397
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methodOop constMethodOopDesc::method() const { |
0032fb2caff6
7172967: Eliminate constMethod's _method backpointer to methodOop.
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return instanceKlass::cast(_constants->pool_holder())->method_with_idnum( |
0032fb2caff6
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_method_idnum); |
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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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} |