1 /* 2 * Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2014 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_PPC_JAVAFRAMEANCHOR_PPC_HPP 27 #define CPU_PPC_JAVAFRAMEANCHOR_PPC_HPP 28 29 public: 30 // Each arch must define reset, save, restore 31 // These are used by objects that only care about: 32 // 1 - initializing a new state (thread creation, javaCalls) 33 // 2 - saving a current state (javaCalls) 34 // 3 - restoring an old state (javaCalls) 35 36 inline void clear(void) { 37 // clearing _last_Java_sp must be first 38 _last_Java_sp = NULL; 39 // fence? 40 OrderAccess::release(); 41 _last_Java_pc = NULL; 42 } 43 set(intptr_t * sp,address pc)44 inline void set(intptr_t* sp, address pc) { 45 _last_Java_pc = pc; 46 OrderAccess::release(); 47 _last_Java_sp = sp; 48 } 49 copy(JavaFrameAnchor * src)50 void copy(JavaFrameAnchor* src) { 51 // In order to make sure the transition state is valid for "this". 52 // We must clear _last_Java_sp before copying the rest of the new data. 53 // 54 // Hack Alert: Temporary bugfix for 4717480/4721647 55 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp 56 // unless the value is changing. 57 if (_last_Java_sp != src->_last_Java_sp) { 58 _last_Java_sp = NULL; 59 OrderAccess::release(); 60 } 61 _last_Java_pc = src->_last_Java_pc; 62 // Must be last so profiler will always see valid frame if has_last_frame() is true. 63 OrderAccess::release(); 64 _last_Java_sp = src->_last_Java_sp; 65 } 66 67 // Always walkable. walkable(void)68 bool walkable(void) { return true; } 69 // Never any thing to do since we are always walkable and can find address of return addresses. make_walkable(JavaThread * thread)70 void make_walkable(JavaThread* thread) { } 71 last_Java_sp(void) const72 intptr_t* last_Java_sp(void) const { return _last_Java_sp; } 73 last_Java_pc(void)74 address last_Java_pc(void) { return _last_Java_pc; } 75 set_last_Java_sp(intptr_t * sp)76 void set_last_Java_sp(intptr_t* sp) { OrderAccess::release(); _last_Java_sp = sp; } 77 78 #endif // CPU_PPC_JAVAFRAMEANCHOR_PPC_HPP 79