jdk8-mips64-public/hotspot: src/share/vm/oops/constMethodOop.cpp@ddd894528dbc

7056328: JSR 292 invocation sometimes fails in adapters for types not on boot class path
Reviewed-by: never

     1 /*

     2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "oops/constMethodOop.hpp"

    27 #include "oops/methodOop.hpp"

    29 // Static initialization

    30 const u2 constMethodOopDesc::MAX_IDNUM   = 0xFFFE;

    31 const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF;

    33 // How big must this constMethodObject be?

    35 int constMethodOopDesc::object_size(int code_size,

    36                                     int compressed_line_number_size,

    37                                     int local_variable_table_length,

    38                                     int checked_exceptions_length) {

    39   int extra_bytes = code_size;

    40   if (compressed_line_number_size > 0) {

    41     extra_bytes += compressed_line_number_size;

    42   }

    43   if (checked_exceptions_length > 0) {

    44     extra_bytes += sizeof(u2);

    45     extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement);

    46   }

    47   if (local_variable_table_length > 0) {

    48     extra_bytes += sizeof(u2);

    49     extra_bytes +=

    50               local_variable_table_length * sizeof(LocalVariableTableElement);

    51   }

    52   int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord;

    53   return align_object_size(header_size() + extra_words);

    54 }

    57 // linenumber table - note that length is unknown until decompression,

    58 // see class CompressedLineNumberReadStream.

    60 u_char* constMethodOopDesc::compressed_linenumber_table() const {

    61   // Located immediately following the bytecodes.

    62   assert(has_linenumber_table(), "called only if table is present");

    63   return code_end();

    64 }

    66 u2* constMethodOopDesc::checked_exceptions_length_addr() const {

    67   // Located at the end of the constMethod.

    68   assert(has_checked_exceptions(), "called only if table is present");

    69   return last_u2_element();

    70 }

    72 u2* constMethodOopDesc::localvariable_table_length_addr() const {

    73   assert(has_localvariable_table(), "called only if table is present");

    74   if (has_checked_exceptions()) {

    75     // If checked_exception present, locate immediately before them.

    76     return (u2*) checked_exceptions_start() - 1;

    77   } else {

    78     // Else, the linenumber table is at the end of the constMethod.

    79     return last_u2_element();

    80   }

    81 }

    84 // Update the flags to indicate the presence of these optional fields.

    85 void constMethodOopDesc::set_inlined_tables_length(

    86                                               int checked_exceptions_len,

    87                                               int compressed_line_number_size,

    88                                               int localvariable_table_len) {

    89   // Must be done in the order below, otherwise length_addr accessors

    90   // will not work. Only set bit in header if length is positive.

    91   assert(_flags == 0, "Error");

    92   if (compressed_line_number_size > 0) {

    93     _flags |= _has_linenumber_table;

    94   }

    95   if (checked_exceptions_len > 0) {

    96     _flags |= _has_checked_exceptions;

    97     *(checked_exceptions_length_addr()) = checked_exceptions_len;

    98   }

    99   if (localvariable_table_len > 0) {

   100     _flags |= _has_localvariable_table;

   101     *(localvariable_table_length_addr()) = localvariable_table_len;

   102   }

   103 }

   106 int constMethodOopDesc::checked_exceptions_length() const {

   107   return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0;

   108 }

   111 CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const {

   112   u2* addr = checked_exceptions_length_addr();

   113   u2 length = *addr;

   114   assert(length > 0, "should only be called if table is present");

   115   addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2);

   116   return (CheckedExceptionElement*) addr;

   117 }

   120 int constMethodOopDesc::localvariable_table_length() const {

   121   return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0;

   122 }

   125 LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const {

   126   u2* addr = localvariable_table_length_addr();

   127   u2 length = *addr;

   128   assert(length > 0, "should only be called if table is present");

   129   addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2);

   130   return (LocalVariableTableElement*) addr;

   131 }

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