frame_x86.hpp revision 1879:f95d63e2154a
1/* 2 * Copyright (c) 1997, 2010, 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// [methodOop ] = 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. Howevers tTo 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 succesive 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 = 8, 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 }; 147 148 intptr_t ptr_at(int offset) const { 149 return *ptr_at_addr(offset); 150 } 151 152 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; 167 168 intptr_t* ptr_at_addr(int offset) const { 169 return (intptr_t*) addr_at(offset); 170 } 171 172#if ASSERT 173 // Used in frame::sender_for_{interpreter,compiled}_frame 174 static void verify_deopt_original_pc( nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false); 175 static void verify_deopt_mh_original_pc(nmethod* nm, intptr_t* unextended_sp) { 176 verify_deopt_original_pc(nm, unextended_sp, true); 177 } 178#endif 179 180 public: 181 // Constructors 182 183 frame(intptr_t* sp, intptr_t* fp, address pc); 184 185 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); 186 187 frame(intptr_t* sp, intptr_t* fp); 188 189 // accessors for the instance variables 190 intptr_t* fp() const { return _fp; } 191 192 inline address* sender_pc_addr() const; 193 194 // return address of param, zero origin index. 195 inline address* native_param_addr(int idx) const; 196 197 // expression stack tos if we are nested in a java call 198 intptr_t* interpreter_frame_last_sp() const; 199 200#ifndef CC_INTERP 201 // deoptimization support 202 void interpreter_frame_set_last_sp(intptr_t* sp); 203#endif // CC_INTERP 204 205#ifdef CC_INTERP 206 inline interpreterState get_interpreterState() const; 207#endif // CC_INTERP 208 209#endif // CPU_X86_VM_FRAME_X86_HPP 210