Mercurial > hg > graal-compiler
view src/share/vm/oops/constMethodOop.cpp @ 2246:fbf3184da15d
7012339: JSR 292 crash in G1SATBCardTableModRefBS::write_ref_field_pre_work()
Reviewed-by: jrose, never
author | twisti |
---|---|
date | Tue, 01 Feb 2011 05:51:24 -0800 |
parents | f95d63e2154a |
children | 2fe087c3e814 |
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/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "oops/constMethodOop.hpp" #include "oops/methodOop.hpp" // 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; }