Mercurial > hg > truffle
view src/share/vm/runtime/javaFrameAnchor.hpp @ 15583:d331b7c3d7c4
[single-pass-iter] start of evolution towards a node iterator less memory-hungry
author | Miguel Garcia <miguel.m.garcia@oracle.com> |
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date | Fri, 09 May 2014 16:22:54 +0200 |
parents | 4ca6dc0799b6 |
children | 52b4284cb496 |
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/* * Copyright (c) 2002, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP #define SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP #include "utilities/globalDefinitions.hpp" #ifdef TARGET_OS_ARCH_linux_x86 # include "orderAccess_linux_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_sparc # include "orderAccess_linux_sparc.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_zero # include "orderAccess_linux_zero.inline.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_x86 # include "orderAccess_solaris_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_sparc # include "orderAccess_solaris_sparc.inline.hpp" #endif #ifdef TARGET_OS_ARCH_windows_x86 # include "orderAccess_windows_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_arm # include "orderAccess_linux_arm.inline.hpp" #endif #ifdef TARGET_OS_ARCH_linux_ppc # include "orderAccess_linux_ppc.inline.hpp" #endif #ifdef TARGET_OS_ARCH_bsd_x86 # include "orderAccess_bsd_x86.inline.hpp" #endif #ifdef TARGET_OS_ARCH_bsd_zero # include "orderAccess_bsd_zero.inline.hpp" #endif // // 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; } #ifdef TARGET_ARCH_x86 # include "javaFrameAnchor_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "javaFrameAnchor_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "javaFrameAnchor_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "javaFrameAnchor_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "javaFrameAnchor_ppc.hpp" #endif public: JavaFrameAnchor() { clear(); } JavaFrameAnchor(JavaFrameAnchor *src) { copy(src); } 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); } }; #endif // SHARE_VM_RUNTIME_JAVAFRAMEANCHOR_HPP