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1 /* |
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * Copyright (c) 2016 SAP SE. 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 #include "precompiled.hpp" |
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27 #include "interpreter/interpreter.hpp" |
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28 #include "oops/constMethod.hpp" |
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29 #include "oops/method.hpp" |
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30 #include "runtime/frame.inline.hpp" |
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31 #include "utilities/debug.hpp" |
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32 #include "utilities/macros.hpp" |
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33 |
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34 int AbstractInterpreter::BasicType_as_index(BasicType type) { |
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35 int i = 0; |
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36 switch (type) { |
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37 case T_BOOLEAN: i = 0; break; |
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38 case T_CHAR : i = 1; break; |
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39 case T_BYTE : i = 2; break; |
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40 case T_SHORT : i = 3; break; |
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41 case T_INT : i = 4; break; |
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42 case T_LONG : i = 5; break; |
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43 case T_VOID : i = 6; break; |
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44 case T_FLOAT : i = 7; break; |
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45 case T_DOUBLE : i = 8; break; |
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46 case T_OBJECT : i = 9; break; |
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47 case T_ARRAY : i = 9; break; |
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48 default : ShouldNotReachHere(); |
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49 } |
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50 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); |
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51 return i; |
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52 } |
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53 |
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54 bool AbstractInterpreter::can_be_compiled(methodHandle m) { |
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55 // No special entry points that preclude compilation. |
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56 return true; |
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57 } |
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58 |
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59 // How much stack a method top interpreter activation needs in words. |
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60 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
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61 |
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62 // We have to size the following 2 frames: |
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63 // |
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64 // [TOP_IJAVA_FRAME_ABI] |
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65 // [ENTRY_FRAME] |
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66 // |
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67 // This expands to (see frame_s390.hpp): |
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68 // |
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69 // [TOP_IJAVA_FRAME_ABI] |
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70 // [operand stack] > stack |
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71 // [monitors] (optional) > monitors |
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72 // [IJAVA_STATE] > interpreter_state |
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73 // [PARENT_IJAVA_FRAME_ABI] |
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74 // [callee's locals w/o arguments] \ locals |
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75 // [outgoing arguments] / |
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76 // [ENTRY_FRAME_LOCALS] |
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77 |
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78 int locals = method->max_locals() * BytesPerWord; |
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79 int interpreter_state = frame::z_ijava_state_size; |
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80 |
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81 int stack = method->max_stack() * BytesPerWord; |
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82 int monitors = method->is_synchronized() ? frame::interpreter_frame_monitor_size_in_bytes() : 0; |
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83 |
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84 int total_bytes = |
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85 frame::z_top_ijava_frame_abi_size + |
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86 stack + |
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87 monitors + |
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88 interpreter_state + |
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89 frame::z_parent_ijava_frame_abi_size + |
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90 locals + |
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91 frame::z_entry_frame_locals_size; |
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92 |
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93 return (total_bytes/BytesPerWord); |
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94 } |
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95 |
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96 // Returns number of stackElementWords needed for the interpreter frame with the |
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97 // given sections. |
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98 // This overestimates the stack by one slot in case of alignments. |
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99 int AbstractInterpreter::size_activation(int max_stack, |
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100 int temps, |
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101 int extra_args, |
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102 int monitors, |
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103 int callee_params, |
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104 int callee_locals, |
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105 bool is_top_frame) { |
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106 // Note: This calculation must exactly parallel the frame setup |
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107 // in AbstractInterpreterGenerator::generate_method_entry. |
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108 |
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109 assert((Interpreter::stackElementSize == frame::alignment_in_bytes), "must align frame size"); |
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110 const int abi_scratch = is_top_frame ? (frame::z_top_ijava_frame_abi_size / Interpreter::stackElementSize) : |
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111 (frame::z_parent_ijava_frame_abi_size / Interpreter::stackElementSize); |
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112 |
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113 const int size = |
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114 max_stack + |
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115 (callee_locals - callee_params) + // Already counted in max_stack(). |
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116 monitors * frame::interpreter_frame_monitor_size() + |
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117 abi_scratch + |
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118 frame::z_ijava_state_size / Interpreter::stackElementSize; |
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119 |
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120 // Fixed size of an interpreter frame. |
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121 return size; |
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122 } |
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123 |
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124 // Fills a sceletal interpreter frame generated during deoptimizations. |
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125 // |
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126 // Parameters: |
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127 // |
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128 // interpreter_frame != NULL: |
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129 // set up the method, locals, and monitors. |
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130 // The frame interpreter_frame, if not NULL, is guaranteed to be the |
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131 // right size, as determined by a previous call to this method. |
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132 // It is also guaranteed to be walkable even though it is in a skeletal state |
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133 // |
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134 // is_top_frame == true: |
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135 // We're processing the *oldest* interpreter frame! |
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136 // |
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137 // pop_frame_extra_args: |
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138 // If this is != 0 we are returning to a deoptimized frame by popping |
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139 // off the callee frame. We want to re-execute the call that called the |
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140 // callee interpreted, but since the return to the interpreter would pop |
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141 // the arguments off advance the esp by dummy popframe_extra_args slots. |
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142 // Popping off those will establish the stack layout as it was before the call. |
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143 // |
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144 |
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145 void AbstractInterpreter::layout_activation(Method* method, |
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146 int tempcount, |
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147 int popframe_extra_args, |
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148 int moncount, |
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149 int caller_actual_parameters, |
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150 int callee_param_count, |
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151 int callee_locals_count, |
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152 frame* caller, |
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153 frame* interpreter_frame, |
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154 bool is_top_frame, |
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155 bool is_bottom_frame) { |
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156 // TOP_IJAVA_FRAME: |
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157 // |
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158 // 0 [TOP_IJAVA_FRAME_ABI] -+ |
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159 // 16 [operand stack] | size |
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160 // [monitors] (optional) | |
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161 // [IJAVA_STATE] -+ |
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162 // Note: own locals are located in the caller frame. |
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163 // |
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164 // PARENT_IJAVA_FRAME: |
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165 // |
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166 // 0 [PARENT_IJAVA_FRAME_ABI] -+ |
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167 // [callee's locals w/o arguments] | |
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168 // [outgoing arguments] | size |
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169 // [used part of operand stack w/o arguments] | |
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170 // [monitors] (optional) | |
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171 // [IJAVA_STATE] -+ |
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172 // |
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173 |
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174 // Now we know our caller, calc the exact frame layout and size |
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175 // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0). |
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176 intptr_t* locals_base = (caller->is_interpreted_frame()) |
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177 ? (caller->interpreter_frame_tos_address() + caller_actual_parameters - 1) |
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178 : (caller->sp() + method->max_locals() - 1 + |
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179 frame::z_parent_ijava_frame_abi_size / Interpreter::stackElementSize); |
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180 |
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181 intptr_t* monitor_base = (intptr_t*)((address)interpreter_frame->fp() - frame::z_ijava_state_size); |
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182 intptr_t* monitor = monitor_base - (moncount * frame::interpreter_frame_monitor_size()); |
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183 intptr_t* operand_stack_base = monitor; |
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184 intptr_t* tos = operand_stack_base - tempcount - popframe_extra_args; |
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185 intptr_t* top_frame_sp = |
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186 operand_stack_base - method->max_stack() - frame::z_top_ijava_frame_abi_size / Interpreter::stackElementSize; |
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187 intptr_t* sender_sp; |
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188 if (caller->is_interpreted_frame()) { |
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189 sender_sp = caller->interpreter_frame_top_frame_sp(); |
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190 } else if (caller->is_compiled_frame()) { |
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191 sender_sp = caller->fp() - caller->cb()->frame_size(); |
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192 // The bottom frame's sender_sp is its caller's unextended_sp. |
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193 // It was already set when its skeleton was pushed (see push_skeleton_frames()). |
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194 // Note: the unextended_sp is required by nmethod::orig_pc_addr(). |
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195 assert(is_bottom_frame && (sender_sp == caller->unextended_sp()), |
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196 "must initialize sender_sp of bottom skeleton frame when pushing it"); |
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197 } else { |
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198 assert(caller->is_entry_frame(), "is there a new frame type??"); |
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199 sender_sp = caller->sp(); // Call_stub only uses it's fp. |
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200 } |
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201 |
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202 interpreter_frame->interpreter_frame_set_method(method); |
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203 interpreter_frame->interpreter_frame_set_mirror(method->method_holder()->java_mirror()); |
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204 interpreter_frame->interpreter_frame_set_locals(locals_base); |
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205 interpreter_frame->interpreter_frame_set_monitor_end((BasicObjectLock *)monitor); |
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206 *interpreter_frame->interpreter_frame_cache_addr() = method->constants()->cache(); |
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207 interpreter_frame->interpreter_frame_set_tos_address(tos); |
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208 interpreter_frame->interpreter_frame_set_sender_sp(sender_sp); |
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209 interpreter_frame->interpreter_frame_set_top_frame_sp(top_frame_sp); |
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210 } |