jdk8-mips64-public/hotspot: src/cpu/zero/vm/entry

6951784: Zero deoptimizer changes
Summary: The way Zero currently handles deoptimization can lead to methods being freed while they are still being executed.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>

     1 /*

     2  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.

     3  * Copyright 2008, 2009, 2010 Red Hat, Inc.

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

     5  *

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

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

     8  * published by the Free Software Foundation.

     9  *

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

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

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

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

    14  * accompanied this code).

    15  *

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

    17  * 2 along with this work; if not, write to the Free Software Foundation,

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

    19  *

    20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    21  * CA 95054 USA or visit www.sun.com if you need additional information or

    22  * have any questions.

    23  *

    24  */

    26 class ZeroEntry {

    27  public:

    28   ZeroEntry() {

    29     ShouldNotCallThis();

    30   }

    32  private:

    33   address _entry_point;

    35  public:

    36   address entry_point() const {

    37     return _entry_point;

    38   }

    39   void set_entry_point(address entry_point) {

    40     _entry_point = entry_point;

    41   }

    43  private:

    44   typedef int (*NormalEntryFunc)(methodOop method,

    45                                  intptr_t  base_pc,

    46                                  TRAPS);

    47   typedef int (*OSREntryFunc)(methodOop method,

    48                               address   osr_buf,

    49                               intptr_t  base_pc,

    50                               TRAPS);

    52  public:

    53   void invoke(methodOop method, TRAPS) const {

    54     maybe_deoptimize(

    55       ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD),

    56       THREAD);

    57   }

    58   void invoke_osr(methodOop method, address osr_buf, TRAPS) const {

    59     maybe_deoptimize(

    60       ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD),

    61       THREAD);

    62   }

    64  private:

    65   static void maybe_deoptimize(int deoptimized_frames, TRAPS) {

    66     if (deoptimized_frames)

    67       CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);

    68   }

    70  public:

    71   static ByteSize entry_point_offset() {

    72     return byte_offset_of(ZeroEntry, _entry_point);

    73   }

    74 };

src/cpu/zero/vm/entry_zero.hpp@22af4ce8dba1

src/cpu/zero/vm/entry_zero.hpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/zero/vm/entry_zero.hpp@22af4ce8dba1

src/cpu/zero/vm/entry_zero.hpp