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This commit is contained in:
J. Duke 2007-12-01 00:00:00 +00:00
parent 686d76f772
commit 8153779ad3
2894 changed files with 911801 additions and 0 deletions
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hotspot/src/share/vm/runtime/javaFrameAnchor.hpp Normal file
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/*
* Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved.
* 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.
*
*/
//
// An object for encapsulating the machine/os dependent part of a JavaThread frame state
//
class JavaThread;
class JavaFrameAnchor VALUE_OBJ_CLASS_SPEC {
// Too many friends...
friend class CallNativeDirectNode;
friend class OptoRuntime;
friend class Runtime1;
friend class StubAssembler;
friend class CallRuntimeDirectNode;
friend class MacroAssembler;
friend class InterpreterGenerator;
friend class LIR_Assembler;
friend class GraphKit;
friend class StubGenerator;
friend class JavaThread;
friend class frame;
friend class VMStructs;
friend class BytecodeInterpreter;
friend class JavaCallWrapper;
private:
//
// Whenever _last_Java_sp != NULL other anchor fields MUST be valid!
// The stack may not be walkable [check with walkable() ] but the values must be valid.
// The profiler apparently depends on this.
//
intptr_t* volatile _last_Java_sp;
// Whenever we call from Java to native we can not be assured that the return
// address that composes the last_Java_frame will be in an accessible location
// so calls from Java to native store that pc (or one good enough to locate
// the oopmap) in the frame anchor. Since the frames that call from Java to
// native are never deoptimized we never need to patch the pc and so this
// is acceptable.
volatile address _last_Java_pc;
// tells whether the last Java frame is set
// It is important that when last_Java_sp != NULL that the rest of the frame
// anchor (including platform specific) all be valid.
bool has_last_Java_frame() const { return _last_Java_sp != NULL; }
// This is very dangerous unless sp == NULL
// Invalidate the anchor so that has_last_frame is false
// and no one should look at the other fields.
void zap(void) { _last_Java_sp = NULL; }
#include "incls/_javaFrameAnchor_pd.hpp.incl"
public:
JavaFrameAnchor() { clear(); }
JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); }
address last_Java_pc(void) { return _last_Java_pc; }
void set_last_Java_pc(address pc) { _last_Java_pc = pc; }
// Assembly stub generation helpers
static ByteSize last_Java_sp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_sp); }
static ByteSize last_Java_pc_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_pc); }
};