/* | |
* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. | |
* Copyright 2007, 2008 Red Hat, Inc. | |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
* | |
* This code is free software; you can redistribute it and/or modify it | |
* under the terms of the GNU General Public License version 2 only, as | |
* published by the Free Software Foundation. | |
* | |
* This code is distributed in the hope that it will be useful, but WITHOUT | |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
* version 2 for more details (a copy is included in the LICENSE file that | |
* accompanied this code). | |
* | |
* You should have received a copy of the GNU General Public License version | |
* 2 along with this work; if not, write to the Free Software Foundation, | |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
* | |
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
* CA 95054 USA or visit www.sun.com if you need additional information or | |
* have any questions. | |
* | |
*/ | |
public: | |
// Each arch must define reset, save, restore | |
// These are used by objects that only care about: | |
// 1 - initializing a new state (thread creation, javaCalls) | |
// 2 - saving a current state (javaCalls) | |
// 3 - restoring an old state (javaCalls) | |
void clear() { | |
// clearing _last_Java_sp must be first | |
_last_Java_sp = NULL; | |
// fence? | |
_last_Java_pc = NULL; | |
} | |
void copy(JavaFrameAnchor* src) { | |
// In order to make sure the transition state is valid for "this" | |
// We must clear _last_Java_sp before copying the rest of the new | |
// data | |
// | |
// Hack Alert: Temporary bugfix for 4717480/4721647 To act like | |
// previous version (pd_cache_state) don't NULL _last_Java_sp | |
// unless the value is changing | |
// | |
if (_last_Java_sp != src->_last_Java_sp) | |
_last_Java_sp = NULL; | |
_last_Java_pc = src->_last_Java_pc; | |
// Must be last so profiler will always see valid frame if | |
// has_last_frame() is true | |
_last_Java_sp = src->_last_Java_sp; | |
} | |
bool walkable() { | |
return true; | |
} | |
void make_walkable(JavaThread* thread) { | |
// nothing to do | |
} | |
intptr_t* last_Java_sp() const { | |
return _last_Java_sp; | |
} | |
void set_last_Java_sp(intptr_t* sp) { | |
_last_Java_sp = sp; | |
} |