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1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * |
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6 * This code is free software; you can redistribute it and/or modify it |
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7 * under the terms of the GNU General Public License version 2 only, as |
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8 * published by the Free Software Foundation. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
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23 * |
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24 */ |
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25 |
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26 #ifndef CPU_AARCH64_VM_FRAME_AARCH64_HPP |
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27 #define CPU_AARCH64_VM_FRAME_AARCH64_HPP |
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28 |
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29 #include "runtime/synchronizer.hpp" |
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30 #include "utilities/top.hpp" |
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31 |
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32 // A frame represents a physical stack frame (an activation). Frames can be |
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33 // C or Java frames, and the Java frames can be interpreted or compiled. |
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34 // In contrast, vframes represent source-level activations, so that one physical frame |
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35 // can correspond to multiple source level frames because of inlining. |
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36 // A frame is comprised of {pc, fp, sp} |
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37 // ------------------------------ Asm interpreter ---------------------------------------- |
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38 // Layout of asm interpreter frame: |
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39 // [expression stack ] * <- sp |
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40 |
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41 // [monitors[0] ] \ |
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42 // ... | monitor block size = k |
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43 // [monitors[k-1] ] / |
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44 // [frame initial esp ] ( == &monitors[0], initially here) initial_sp_offset |
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45 // [byte code index/pointr] = bcx() bcx_offset |
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46 |
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47 // [pointer to locals ] = locals() locals_offset |
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48 // [constant pool cache ] = cache() cache_offset |
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49 |
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50 // [methodData ] = mdp() mdx_offset |
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51 // [methodOop ] = method() method_offset |
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52 |
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53 // [last esp ] = last_sp() last_sp_offset |
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54 // [old stack pointer ] (sender_sp) sender_sp_offset |
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55 |
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56 // [old frame pointer ] <- fp = link() |
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57 // [return pc ] |
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58 |
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59 // [last sp ] |
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60 // [oop temp ] (only for native calls) |
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61 |
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62 // [locals and parameters ] |
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63 // <- sender sp |
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64 // ------------------------------ Asm interpreter ---------------------------------------- |
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65 |
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66 // ------------------------------ C++ interpreter ---------------------------------------- |
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67 // |
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68 // Layout of C++ interpreter frame: (While executing in BytecodeInterpreter::run) |
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69 // |
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70 // <- SP (current esp/rsp) |
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71 // [local variables ] BytecodeInterpreter::run local variables |
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72 // ... BytecodeInterpreter::run local variables |
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73 // [local variables ] BytecodeInterpreter::run local variables |
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74 // [old frame pointer ] fp [ BytecodeInterpreter::run's ebp/rbp ] |
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75 // [return pc ] (return to frame manager) |
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76 // [interpreter_state* ] (arg to BytecodeInterpreter::run) -------------- |
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77 // [expression stack ] <- last_Java_sp | |
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78 // [... ] * <- interpreter_state.stack | |
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79 // [expression stack ] * <- interpreter_state.stack_base | |
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80 // [monitors ] \ | |
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81 // ... | monitor block size | |
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82 // [monitors ] / <- interpreter_state.monitor_base | |
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83 // [struct interpretState ] <-----------------------------------------| |
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84 // [return pc ] (return to callee of frame manager [1] |
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85 // [locals and parameters ] |
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86 // <- sender sp |
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87 |
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88 // [1] When the c++ interpreter calls a new method it returns to the frame |
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89 // manager which allocates a new frame on the stack. In that case there |
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90 // is no real callee of this newly allocated frame. The frame manager is |
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91 // aware of the additional frame(s) and will pop them as nested calls |
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92 // complete. Howevers tTo make it look good in the debugger the frame |
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93 // manager actually installs a dummy pc pointing to RecursiveInterpreterActivation |
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94 // with a fake interpreter_state* parameter to make it easy to debug |
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95 // nested calls. |
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96 |
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97 // Note that contrary to the layout for the assembly interpreter the |
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98 // expression stack allocated for the C++ interpreter is full sized. |
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99 // However this is not as bad as it seems as the interpreter frame_manager |
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100 // will truncate the unused space on succesive method calls. |
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101 // |
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102 // ------------------------------ C++ interpreter ---------------------------------------- |
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103 |
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104 public: |
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105 enum { |
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106 pc_return_offset = 0, |
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107 // All frames |
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108 link_offset = 0, |
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109 return_addr_offset = 1, |
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110 sender_sp_offset = 2, |
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111 |
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112 #ifndef CC_INTERP |
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113 |
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114 // Interpreter frames |
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115 interpreter_frame_oop_temp_offset = 3, // for native calls only |
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116 |
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117 interpreter_frame_sender_sp_offset = -1, |
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118 // outgoing sp before a call to an invoked method |
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119 interpreter_frame_last_sp_offset = interpreter_frame_sender_sp_offset - 1, |
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120 interpreter_frame_method_offset = interpreter_frame_last_sp_offset - 1, |
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121 interpreter_frame_mdp_offset = interpreter_frame_method_offset - 1, |
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122 interpreter_frame_cache_offset = interpreter_frame_mdp_offset - 1, |
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123 interpreter_frame_locals_offset = interpreter_frame_cache_offset - 1, |
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124 interpreter_frame_bcp_offset = interpreter_frame_locals_offset - 1, |
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125 interpreter_frame_initial_sp_offset = interpreter_frame_bcp_offset - 1, |
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126 |
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127 interpreter_frame_monitor_block_top_offset = interpreter_frame_initial_sp_offset, |
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128 interpreter_frame_monitor_block_bottom_offset = interpreter_frame_initial_sp_offset, |
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129 |
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130 #endif // CC_INTERP |
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131 |
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132 // Entry frames |
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133 // n.b. these values are determined by the layout defined in |
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134 // stubGenerator for the Java call stub |
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135 entry_frame_after_call_words = 27, |
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136 entry_frame_call_wrapper_offset = -8, |
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137 |
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138 // we don't need a save area |
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139 arg_reg_save_area_bytes = 0, |
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140 |
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141 // TODO - check that this is still correct |
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142 // Native frames |
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143 |
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144 native_frame_initial_param_offset = 2 |
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145 |
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146 }; |
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147 |
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148 intptr_t ptr_at(int offset) const { |
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149 return *ptr_at_addr(offset); |
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150 } |
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151 |
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152 void ptr_at_put(int offset, intptr_t value) { |
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153 *ptr_at_addr(offset) = value; |
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154 } |
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155 |
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156 private: |
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157 // an additional field beyond _sp and _pc: |
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158 intptr_t* _fp; // frame pointer |
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159 // The interpreter and adapters will extend the frame of the caller. |
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160 // Since oopMaps are based on the sp of the caller before extension |
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161 // we need to know that value. However in order to compute the address |
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162 // of the return address we need the real "raw" sp. Since sparc already |
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163 // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's |
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164 // original sp we use that convention. |
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165 |
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166 intptr_t* _unextended_sp; |
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167 void adjust_unextended_sp(); |
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168 |
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169 intptr_t* ptr_at_addr(int offset) const { |
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170 return (intptr_t*) addr_at(offset); |
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171 } |
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172 |
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173 #ifdef ASSERT |
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174 // Used in frame::sender_for_{interpreter,compiled}_frame |
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175 static void verify_deopt_original_pc( nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false); |
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176 static void verify_deopt_mh_original_pc(nmethod* nm, intptr_t* unextended_sp) { |
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177 verify_deopt_original_pc(nm, unextended_sp, true); |
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178 } |
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179 #endif |
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180 |
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181 public: |
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182 // Constructors |
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183 |
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184 frame(intptr_t* sp, intptr_t* fp, address pc); |
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185 |
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186 frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc); |
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187 |
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188 frame(intptr_t* sp, intptr_t* fp); |
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189 |
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190 void init(intptr_t* sp, intptr_t* fp, address pc); |
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191 |
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192 // accessors for the instance variables |
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193 // Note: not necessarily the real 'frame pointer' (see real_fp) |
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194 intptr_t* fp() const { return _fp; } |
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195 |
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196 inline address* sender_pc_addr() const; |
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197 |
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198 // return address of param, zero origin index. |
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199 inline address* native_param_addr(int idx) const; |
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200 |
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201 // expression stack tos if we are nested in a java call |
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202 intptr_t* interpreter_frame_last_sp() const; |
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203 |
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204 // helper to update a map with callee-saved RBP |
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205 static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr); |
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206 |
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207 #ifndef CC_INTERP |
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208 // deoptimization support |
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209 void interpreter_frame_set_last_sp(intptr_t* sp); |
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210 #endif // CC_INTERP |
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211 |
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212 #ifdef CC_INTERP |
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213 inline interpreterState get_interpreterState() const; |
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214 #endif // CC_INTERP |
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215 |
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216 #endif // CPU_AARCH64_VM_FRAME_AARCH64_HPP |