1 /* 2 * Copyright (c) 1997, 2013, 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_X86_VM_FRAME_X86_HPP 26 #define CPU_X86_VM_FRAME_X86_HPP 27 28 #include "runtime/synchronizer.hpp" 29 #include "utilities/top.hpp" 30 31 // A frame represents a physical stack frame (an activation). Frames can be 32 // C or Java frames, and the Java frames can be interpreted or compiled. 33 // In contrast, vframes represent source-level activations, so that one physical frame 34 // can correspond to multiple source level frames because of inlining. 35 // A frame is comprised of {pc, fp, sp} 36 // ------------------------------ Asm interpreter ---------------------------------------- 37 // Layout of asm interpreter frame: 38 // [expression stack ] * <- sp 39 // [monitors ] \ 40 // ... | monitor block size 41 // [monitors ] / 42 // [monitor block size ] 43 // [byte code index/pointr] = bcx() bcx_offset 44 // [pointer to locals ] = locals() locals_offset 45 // [constant pool cache ] = cache() cache_offset 46 // [methodData ] = mdp() mdx_offset 47 // [Method* ] = method() method_offset 48 // [last sp ] = last_sp() last_sp_offset 49 // [old stack pointer ] (sender_sp) sender_sp_offset 50 // [old frame pointer ] <- fp = link() 51 // [return pc ] 52 // [oop temp ] (only for native calls) 53 // [locals and parameters ] 54 // <- sender sp 55 // ------------------------------ Asm interpreter ---------------------------------------- 56 57 // ------------------------------ C++ interpreter ---------------------------------------- 58 // 59 // Layout of C++ interpreter frame: (While executing in BytecodeInterpreter::run) 60 // 61 // <- SP (current esp/rsp) 62 // [local variables ] BytecodeInterpreter::run local variables 63 // ... BytecodeInterpreter::run local variables 64 // [local variables ] BytecodeInterpreter::run local variables 65 // [old frame pointer ] fp [ BytecodeInterpreter::run's ebp/rbp ] 66 // [return pc ] (return to frame manager) 67 // [interpreter_state* ] (arg to BytecodeInterpreter::run) -------------- 68 // [expression stack ] <- last_Java_sp | 69 // [... ] * <- interpreter_state.stack | 70 // [expression stack ] * <- interpreter_state.stack_base | 71 // [monitors ] \ | 72 // ... | monitor block size | 73 // [monitors ] / <- interpreter_state.monitor_base | 74 // [struct interpretState ] <-----------------------------------------| 75 // [return pc ] (return to callee of frame manager [1] 76 // [locals and parameters ] 77 // <- sender sp 78 79 // [1] When the C++ interpreter calls a new method it returns to the frame 80 // manager which allocates a new frame on the stack. In that case there 81 // is no real callee of this newly allocated frame. The frame manager is 82 // aware of the additional frame(s) and will pop them as nested calls 83 // complete. However, to make it look good in the debugger the frame 84 // manager actually installs a dummy pc pointing to RecursiveInterpreterActivation 85 // with a fake interpreter_state* parameter to make it easy to debug 86 // nested calls. 87 88 // Note that contrary to the layout for the assembly interpreter the 89 // expression stack allocated for the C++ interpreter is full sized. 90 // However this is not as bad as it seems as the interpreter frame_manager 91 // will truncate the unused space on successive method calls. 92 // 93 // ------------------------------ C++ interpreter ---------------------------------------- 94 95 public: 96 enum { 97 pc_return_offset = 0, 98 // All frames 99 link_offset = 0, 100 return_addr_offset = 1, 101 // non-interpreter frames 102 sender_sp_offset = 2, 103 104 #ifndef CC_INTERP 105 106 // Interpreter frames 107 interpreter_frame_result_handler_offset = 3, // for native calls only 108 interpreter_frame_oop_temp_offset = 2, // for native calls only 109 110 interpreter_frame_sender_sp_offset = -1, 111 // outgoing sp before a call to an invoked method 112 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, 113 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, 114 interpreter_frame_mdx_offset = interpreter_frame_method_offset - 1, 115 interpreter_frame_cache_offset = interpreter_frame_mdx_offset - 1, 116 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, 117 interpreter_frame_bcx_offset = interpreter_frame_locals_offset - 1, 118 interpreter_frame_initial_sp_offset = interpreter_frame_bcx_offset - 1, 119 120 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, 121 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, 122 123 #endif // CC_INTERP 124 125 // Entry frames 126 #ifdef AMD64 127 #ifdef _WIN64 128 entry_frame_after_call_words = 28, 129 entry_frame_call_wrapper_offset = 2, 130 131 arg_reg_save_area_bytes = 32, // Register argument save area 132 #else 133 entry_frame_after_call_words = 13, 134 entry_frame_call_wrapper_offset = -6, 135 136 arg_reg_save_area_bytes = 0, 137 #endif // _WIN64 138 #else 139 entry_frame_call_wrapper_offset = 2, 140 #endif // AMD64 141 142 // Native frames 143 144 native_frame_initial_param_offset = 2 145 146 }; 147 ptr_at(int offset) const148 intptr_t ptr_at(int offset) const { 149 return *ptr_at_addr(offset); 150 } 151 ptr_at_put(int offset,intptr_t value)152 void ptr_at_put(int offset, intptr_t value) { 153 *ptr_at_addr(offset) = value; 154 } 155 156 private: 157 // an additional field beyond _sp and _pc: 158 intptr_t* _fp; // frame pointer 159 // The interpreter and adapters will extend the frame of the caller. 160 // Since oopMaps are based on the sp of the caller before extension 161 // we need to know that value. However in order to compute the address 162 // of the return address we need the real "raw" sp. Since sparc already 163 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's 164 // original sp we use that convention. 165 166 intptr_t* _unextended_sp; 167 void adjust_unextended_sp(); 168 ptr_at_addr(int offset) const169 intptr_t* ptr_at_addr(int offset) const { 170 return (intptr_t*) addr_at(offset); 171 } 172 173 #ifdef ASSERT 174 // Used in frame::sender_for_{interpreter,compiled}_frame 175 static void verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp); 176 #endif 177 178 public: 179 // Constructors 180 181 frame(intptr_t* sp, intptr_t* fp, address pc); 182 183 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); 184 185 frame(intptr_t* sp, intptr_t* fp); 186 187 void init(intptr_t* sp, intptr_t* fp, address pc); 188 189 // accessors for the instance variables 190 // Note: not necessarily the real 'frame pointer' (see real_fp) fp() const191 intptr_t* fp() const { return _fp; } 192 193 inline address* sender_pc_addr() const; 194 195 // return address of param, zero origin index. 196 inline address* native_param_addr(int idx) const; 197 198 // expression stack tos if we are nested in a java call 199 intptr_t* interpreter_frame_last_sp() const; 200 201 // helper to update a map with callee-saved RBP 202 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); 203 204 #ifndef CC_INTERP 205 // deoptimization support 206 void interpreter_frame_set_last_sp(intptr_t* sp); 207 #endif // CC_INTERP 208 209 #ifdef CC_INTERP 210 inline interpreterState get_interpreterState() const; 211 #endif // CC_INTERP 212 213 #endif // CPU_X86_VM_FRAME_X86_HPP 214