jdk8-mips64-public/hotspot: src/share/vm/oops/constMethodOop.cpp@8150fa46d2ed (annotated)

src/share/vm/oops/constMethodOop.cpp@8150fa46d2ed (annotated)

src/share/vm/oops/constMethodOop.cpp

Tue, 26 Jun 2012 19:08:44 -0400

author: jiangli
date: Tue, 26 Jun 2012 19:08:44 -0400
changeset 3917: 8150fa46d2ed
parent 3826: 2fe087c3e814
permissions: -rw-r--r--

7178145: Change constMethodOop::_exception_table to optionally inlined u2 table.
Summary: Change constMethodOop::_exception_table to optionally inlined u2 table.
Reviewed-by: bdelsart, coleenp, kamg

 /*
  * Copyright (c) 2003, 2012, 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 exception_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);
   }
   if (exception_table_length > 0) {
     extra_bytes += sizeof(u2);
     extra_bytes += exception_table_length * sizeof(ExceptionTableElement);
   }
   int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;
   return align_object_size(header_size() + extra_words);
 }
 methodOop constMethodOopDesc::method() const {
     return instanceKlass::cast(_constants->pool_holder())->method_with_idnum(
                                _method_idnum);
   }
 // 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::exception_table_length_addr() const {
   assert(has_exception_handler(), "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 exception table is at the end of the constMethod.
     return last_u2_element();
   }
 }
 u2* constMethodOopDesc::localvariable_table_length_addr() const {
   assert(has_localvariable_table(), "called only if table is present");
   if (has_exception_handler()) {
     // If exception_table present, locate immediately before them.
     return (u2*) exception_table_start() - 1;
   } else {
     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,
                                               int exception_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 (exception_table_len > 0) {
     _flags |= _has_exception_table;
     *(exception_table_length_addr()) = exception_table_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;
 }
 int constMethodOopDesc::exception_table_length() const {
   return has_exception_handler() ? *(exception_table_length_addr()) : 0;
 }
 ExceptionTableElement* constMethodOopDesc::exception_table_start() const {
   u2* addr = exception_table_length_addr();
   u2 length = *addr;
   assert(length > 0, "should only be called if table is present");
   addr -= length * sizeof(ExceptionTableElement) / sizeof(u2);
   return (ExceptionTableElement*)addr;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/constMethodOop.cpp@8150fa46d2ed (annotated)

src/share/vm/oops/constMethodOop.cpp