Mercurial > hg > graal-jvmci-8
view src/cpu/x86/vm/javaFrameAnchor_x86.hpp @ 3714:b648304ba4ff
Change Graal monitor enter and exit from BasicObjectLock to BasicLock
author | Christian Wimmer <christian.wimmer@oracle.com> |
---|---|
date | Tue, 13 Dec 2011 21:17:46 -0800 |
parents | f95d63e2154a |
children |
line wrap: on
line source
/* * Copyright (c) 2002, 2010, 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 CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP #define CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP private: // FP value associated with _last_Java_sp: intptr_t* volatile _last_Java_fp; // pointer is volatile not what it points to 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(void) { // clearing _last_Java_sp must be first _last_Java_sp = NULL; // fence? _last_Java_fp = NULL; _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_fp = src->_last_Java_fp; _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; } // Always walkable bool walkable(void) { return true; } // Never any thing to do since we are always walkable and can find address of return addresses void make_walkable(JavaThread* thread) { } intptr_t* last_Java_sp(void) const { return _last_Java_sp; } address last_Java_pc(void) { return _last_Java_pc; } private: static ByteSize last_Java_fp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_fp); } public: void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } intptr_t* last_Java_fp(void) { return _last_Java_fp; } // Assert (last_Java_sp == NULL || fp == NULL) void set_last_Java_fp(intptr_t* fp) { _last_Java_fp = fp; } #endif // CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP