--- old/src/hotspot/cpu/sparc/javaFrameAnchor_sparc.hpp 2020-05-01 02:29:05.003678864 -0700 +++ /dev/null 2020-03-09 18:57:19.455001459 -0700 @@ -1,102 +0,0 @@ -/* - * Copyright (c) 2002, 2019, 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_SPARC_JAVAFRAMEANCHOR_SPARC_HPP -#define CPU_SPARC_JAVAFRAMEANCHOR_SPARC_HPP - -private: - volatile int _flags; - -public: - - enum pd_Constants { - flushed = 1 // winodows have flushed - }; - - int flags(void) { return _flags; } - void set_flags(int flags) { _flags = flags; } - - static ByteSize flags_offset() { return byte_offset_of(JavaFrameAnchor, _flags); } - - // Each arch must define clear, copy - // 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? - _flags = 0; - _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; - - _flags = src->_flags; - _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; - } - - // Is stack walkable - inline bool walkable( void) { - return _flags & flushed; - } - - void make_walkable(JavaThread* thread); - - void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } - - address last_Java_pc(void) { return _last_Java_pc; } - - // These are only used by friends -private: - - intptr_t* last_Java_sp() const { - // _last_Java_sp will always be a an unbiased stack pointer - // if is is biased then some setter screwed up. This is - // deadly. - assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp"); - return _last_Java_sp; - } - - void capture_last_Java_pc(intptr_t* sp); - - void set_window_flushed( void) { - _flags |= flushed; - OrderAccess::fence(); - } - -#endif // CPU_SPARC_JAVAFRAMEANCHOR_SPARC_HPP