hotspot/src/share/vm/interpreter/bytecodeStream.cpp
author trims
Thu, 27 May 2010 19:08:38 -0700
changeset 5547 f4b087cbb361
parent 1623 a0dd9009e992
child 5702 201c5cde25bb
permissions -rw-r--r--
6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1623
diff changeset
     2
 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1623
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1623
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 1623
diff changeset
    21
 * questions.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
489c9b5090e2 Initial load
duke
parents:
diff changeset
    25
# include "incls/_precompiled.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
    26
# include "incls/_bytecodeStream.cpp.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
Bytecodes::Code RawBytecodeStream::raw_next_special(Bytecodes::Code code) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    29
  assert(!is_last_bytecode(), "should have been checked");
489c9b5090e2 Initial load
duke
parents:
diff changeset
    30
  // set next bytecode position
1493
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    31
  address bcp = RawBytecodeStream::bcp();
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    32
  address end = method()->code_base() + end_bci();
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    33
  int l = Bytecodes::raw_special_length_at(bcp, end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    34
  if (l <= 0 || (_bci + l) > _end_bci) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    35
    code = Bytecodes::_illegal;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    36
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
    _next_bci += l;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
    assert(_bci < _next_bci, "length must be > 0");
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
    // set attributes
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
    _is_wide = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
    // check for special (uncommon) cases
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
    if (code == Bytecodes::_wide) {
1493
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    43
      if (bcp + 1 >= end) {
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    44
        code = Bytecodes::_illegal;
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    45
      } else {
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    46
        code = (Bytecodes::Code)bcp[1];
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    47
        _is_wide = true;
7d2dc5fbfa8c 6756528: Bytecodes::special_length_at reads past end of code buffer
kamg
parents: 1
diff changeset
    48
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
    49
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
  _code = code;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
  return code;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
}