Mercurial > hg > graal-compiler
view src/share/vm/runtime/javaFrameAnchor.hpp @ 1333:3f12a94552cc
Added tag jdk7-b88 for changeset 4b60f23c4223
author | mikejwre |
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date | Thu, 08 Apr 2010 17:02:41 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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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); } };