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1 /* |
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2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef CPU_X86_VM_FRAME_X86_HPP |
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26 #define CPU_X86_VM_FRAME_X86_HPP |
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27 |
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28 #include "runtime/synchronizer.hpp" |
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29 |
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30 // A frame represents a physical stack frame (an activation). Frames can be |
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31 // C or Java frames, and the Java frames can be interpreted or compiled. |
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32 // In contrast, vframes represent source-level activations, so that one physical frame |
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33 // can correspond to multiple source level frames because of inlining. |
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34 // A frame is comprised of {pc, fp, sp} |
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35 // ------------------------------ Asm interpreter ---------------------------------------- |
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36 // Layout of asm interpreter frame: |
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37 // [expression stack ] * <- sp |
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38 // [monitors ] \ |
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39 // ... | monitor block size |
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40 // [monitors ] / |
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41 // [monitor block size ] |
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42 // [byte code pointer ] = bcp() bcp_offset |
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43 // [pointer to locals ] = locals() locals_offset |
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44 // [constant pool cache ] = cache() cache_offset |
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45 // [methodData ] = mdp() mdx_offset |
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46 // [Method* ] = method() method_offset |
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47 // [last sp ] = last_sp() last_sp_offset |
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48 // [old stack pointer ] (sender_sp) sender_sp_offset |
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49 // [old frame pointer ] <- fp = link() |
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50 // [return pc ] |
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51 // [oop temp ] (only for native calls) |
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52 // [locals and parameters ] |
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53 // <- sender sp |
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54 // ------------------------------ Asm interpreter ---------------------------------------- |
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55 |
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56 public: |
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57 enum { |
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58 pc_return_offset = 0, |
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59 // All frames |
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60 link_offset = 0, |
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61 return_addr_offset = 1, |
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62 // non-interpreter frames |
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63 sender_sp_offset = 2, |
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64 |
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65 // Interpreter frames |
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66 interpreter_frame_result_handler_offset = 3, // for native calls only |
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67 interpreter_frame_oop_temp_offset = 2, // for native calls only |
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68 |
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69 interpreter_frame_sender_sp_offset = -1, |
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70 // outgoing sp before a call to an invoked method |
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71 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, |
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72 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, |
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73 interpreter_frame_mirror_offset = interpreter_frame_method_offset - 1, |
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74 interpreter_frame_mdp_offset = interpreter_frame_mirror_offset - 1, |
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75 interpreter_frame_cache_offset = interpreter_frame_mdp_offset - 1, |
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76 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, |
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77 interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, |
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78 interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, |
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79 |
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80 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, |
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81 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, |
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82 |
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83 // Entry frames |
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84 #ifdef AMD64 |
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85 #ifdef _WIN64 |
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86 entry_frame_after_call_words = 60, |
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87 entry_frame_call_wrapper_offset = 2, |
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88 |
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89 arg_reg_save_area_bytes = 32 // Register argument save area |
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90 #else |
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91 entry_frame_after_call_words = 13, |
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92 entry_frame_call_wrapper_offset = -6, |
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93 |
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94 arg_reg_save_area_bytes = 0 |
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95 #endif // _WIN64 |
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96 #else |
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97 entry_frame_call_wrapper_offset = 2 |
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98 #endif // AMD64 |
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99 }; |
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100 |
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101 intptr_t ptr_at(int offset) const { |
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102 return *ptr_at_addr(offset); |
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103 } |
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104 |
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105 void ptr_at_put(int offset, intptr_t value) { |
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106 *ptr_at_addr(offset) = value; |
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107 } |
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108 |
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109 private: |
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110 // an additional field beyond _sp and _pc: |
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111 intptr_t* _fp; // frame pointer |
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112 // The interpreter and adapters will extend the frame of the caller. |
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113 // Since oopMaps are based on the sp of the caller before extension |
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114 // we need to know that value. However in order to compute the address |
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115 // of the return address we need the real "raw" sp. Since sparc already |
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116 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's |
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117 // original sp we use that convention. |
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118 |
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119 intptr_t* _unextended_sp; |
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120 void adjust_unextended_sp(); |
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121 |
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122 intptr_t* ptr_at_addr(int offset) const { |
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123 return (intptr_t*) addr_at(offset); |
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124 } |
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125 |
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126 #ifdef ASSERT |
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127 // Used in frame::sender_for_{interpreter,compiled}_frame |
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128 static void verify_deopt_original_pc(CompiledMethod* nm, intptr_t* unextended_sp); |
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129 #endif |
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130 |
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131 public: |
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132 // Constructors |
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133 |
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134 frame(intptr_t* sp, intptr_t* fp, address pc); |
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135 |
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136 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); |
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137 |
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138 frame(intptr_t* sp, intptr_t* fp); |
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139 |
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140 void init(intptr_t* sp, intptr_t* fp, address pc); |
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141 |
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142 // accessors for the instance variables |
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143 // Note: not necessarily the real 'frame pointer' (see real_fp) |
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144 intptr_t* fp() const { return _fp; } |
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145 |
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146 inline address* sender_pc_addr() const; |
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147 |
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148 // expression stack tos if we are nested in a java call |
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149 intptr_t* interpreter_frame_last_sp() const; |
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150 |
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151 // helper to update a map with callee-saved RBP |
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152 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); |
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153 |
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154 // deoptimization support |
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155 void interpreter_frame_set_last_sp(intptr_t* sp); |
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156 |
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157 #endif // CPU_X86_VM_FRAME_X86_HPP |