1 /* 2 * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef CPU_ARM_FRAME_ARM_HPP 26 #define CPU_ARM_FRAME_ARM_HPP 27 28 #include "runtime/synchronizer.hpp" 29 30 public: 31 enum { 32 pc_return_offset = 0, 33 // All frames 34 link_offset = 0, 35 return_addr_offset = 1, 36 // non-interpreter frames 37 sender_sp_offset = 2, 38 39 // Interpreter frames 40 interpreter_frame_oop_temp_offset = 2, // for native calls only 41 42 interpreter_frame_sender_sp_offset = -1, 43 // outgoing sp before a call to an invoked method 44 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, 45 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, 46 interpreter_frame_mirror_offset = interpreter_frame_method_offset - 1, 47 interpreter_frame_mdp_offset = interpreter_frame_mirror_offset - 1, 48 interpreter_frame_cache_offset = interpreter_frame_mdp_offset - 1, 49 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, 50 interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, 51 interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, 52 53 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, 54 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, 55 56 // Entry frames 57 entry_frame_call_wrapper_offset = 0 58 }; 59 ptr_at(int offset) const60 intptr_t ptr_at(int offset) const { 61 return *ptr_at_addr(offset); 62 } 63 ptr_at_put(int offset,intptr_t value)64 void ptr_at_put(int offset, intptr_t value) { 65 *ptr_at_addr(offset) = value; 66 } 67 68 private: 69 // an additional field beyond _sp and _pc: 70 intptr_t* _fp; // frame pointer 71 // The interpreter and adapters will extend the frame of the caller. 72 // Since oopMaps are based on the sp of the caller before extension 73 // we need to know that value. However in order to compute the address 74 // of the return address we need the real "raw" sp. Since sparc already 75 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's 76 // original sp we use that convention. 77 78 intptr_t* _unextended_sp; 79 void adjust_unextended_sp(); 80 ptr_at_addr(int offset) const81 intptr_t* ptr_at_addr(int offset) const { 82 return (intptr_t*) addr_at(offset); 83 } 84 85 #ifdef ASSERT 86 // Used in frame::sender_for_{interpreter,compiled}_frame 87 static void verify_deopt_original_pc( CompiledMethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false); verify_deopt_mh_original_pc(CompiledMethod * nm,intptr_t * unextended_sp)88 static void verify_deopt_mh_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) { 89 verify_deopt_original_pc(nm, unextended_sp, true); 90 } 91 #endif 92 93 public: 94 // Constructors 95 96 frame(intptr_t* sp, intptr_t* fp, address pc); 97 98 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); 99 100 frame(intptr_t* sp, intptr_t* fp); 101 102 void init(intptr_t* sp, intptr_t* fp, address pc); 103 104 // accessors for the instance variables 105 // Note: not necessarily the real 'frame pointer' (see real_fp) fp() const106 intptr_t* fp() const { return _fp; } 107 108 inline address* sender_pc_addr() const; 109 110 // expression stack tos if we are nested in a java call 111 intptr_t* interpreter_frame_last_sp() const; 112 113 // deoptimization support 114 void interpreter_frame_set_last_sp(intptr_t* sp); 115 116 // helper to update a map with callee-saved FP 117 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); 118 interpreter_frame_expression_stack_direction()119 static jint interpreter_frame_expression_stack_direction() { return -1; } 120 121 #endif // CPU_ARM_FRAME_ARM_HPP 122