hotspot/src/share/vm/runtime/orderAccess.cpp
author xlu
Thu, 24 Sep 2009 12:10:46 -0700
changeset 4006 7be2d5b3b15c
parent 3261 c7d5aae8d3f7
child 5547 f4b087cbb361
permissions -rw-r--r--
6880029: JDK 1.6.0_u14p Application crashed very early Reviewed-by: never, ysr, acorn
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
3261
c7d5aae8d3f7 6862919: Update copyright year
xdono
parents: 2338
diff changeset
     2
 * Copyright 2003-2009 Sun Microsystems, Inc.  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
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    19
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    20
 * CA 95054 USA or visit www.sun.com if you need additional information or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    21
 * have any questions.
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/_orderAccess.cpp.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
volatile intptr_t OrderAccess::dummy = 0;
2338
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    29
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    30
void OrderAccess::StubRoutines_fence() {
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    31
  // Use a stub if it exists.  It may not exist during bootstrap so do
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    32
  // nothing in that case but assert if no fence code exists after threads have been created
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    33
  void (*func)() = CAST_TO_FN_PTR(void (*)(), StubRoutines::fence_entry());
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    34
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    35
  if (func != NULL) {
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    36
    (*func)();
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    37
    return;
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    38
  }
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    39
  assert(Threads::number_of_threads() == 0, "for bootstrap only");
a8660a1b709b 6822204: volatile fences should prefer lock:addl to actual mfence instructions
never
parents: 1
diff changeset
    40
}