jdk8-mips64-public/hotspot: src/cpu/ppc/vm/javaFrameAnchor

     1 /*

     2  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2012, 2014 SAP AG. All rights reserved.

     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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

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    24  */

    26 #ifndef CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP

    27 #define CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP

    29 public:

    30   // Each arch must define reset, save, restore

    31   // These are used by objects that only care about:

    32   //  1 - initializing a new state (thread creation, javaCalls)

    33   //  2 - saving a current state (javaCalls)

    34   //  3 - restoring an old state (javaCalls)

    36   inline void clear(void) {

    37     // clearing _last_Java_sp must be first

    38     _last_Java_sp = NULL;

    39     // fence?

    40     OrderAccess::release();

    41     _last_Java_pc = NULL;

    42   }

    44   inline void set(intptr_t* sp, address pc) {

    45     _last_Java_pc = pc;

    46     OrderAccess::release();

    47     _last_Java_sp = sp;

    48   }

    50   void copy(JavaFrameAnchor* src) {

    51     // In order to make sure the transition state is valid for "this".

    52     // We must clear _last_Java_sp before copying the rest of the new data.

    53     //

    54     // Hack Alert: Temporary bugfix for 4717480/4721647

    55     // To act like previous version (pd_cache_state) don't NULL _last_Java_sp

    56     // unless the value is changing.

    57     if (_last_Java_sp != src->_last_Java_sp) {

    58       _last_Java_sp = NULL;

    59       OrderAccess::release();

    60     }

    61     _last_Java_pc = src->_last_Java_pc;

    62     // Must be last so profiler will always see valid frame if has_last_frame() is true.

    63     OrderAccess::release();

    64     _last_Java_sp = src->_last_Java_sp;

    65   }

    67   // Always walkable.

    68   bool walkable(void) { return true; }

    69   // Never any thing to do since we are always walkable and can find address of return addresses.

    70   void make_walkable(JavaThread* thread) { }

    72   intptr_t* last_Java_sp(void) const  { return _last_Java_sp; }

    74   address last_Java_pc(void)          { return _last_Java_pc; }

    76   void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; }

    78 #endif // CPU_PPC_VM_JAVAFRAMEANCHOR_PPC_HPP

src/cpu/ppc/vm/javaFrameAnchor_ppc.hpp@70aa912cebe5