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1 /* |
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2 * Copyright (c) 2003, 2017, 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 #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/align.hpp" |
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32 #include "utilities/debug.hpp" |
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33 #include "utilities/macros.hpp" |
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34 |
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35 |
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36 int AbstractInterpreter::BasicType_as_index(BasicType type) { |
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37 int i = 0; |
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38 switch (type) { |
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39 case T_BOOLEAN: i = 0; break; |
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40 case T_CHAR : i = 1; break; |
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41 case T_BYTE : i = 2; break; |
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42 case T_SHORT : i = 3; break; |
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43 case T_INT : i = 4; break; |
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44 case T_LONG : i = 5; break; |
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45 case T_VOID : i = 6; break; |
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46 case T_FLOAT : i = 7; break; |
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47 case T_DOUBLE : i = 8; break; |
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48 case T_OBJECT : i = 9; break; |
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49 case T_ARRAY : i = 9; break; |
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50 default : ShouldNotReachHere(); |
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51 } |
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52 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, |
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53 "index out of bounds"); |
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54 return i; |
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55 } |
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56 |
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57 // How much stack a method activation needs in words. |
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58 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
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59 const int entry_size = frame::interpreter_frame_monitor_size(); |
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60 |
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61 // total overhead size: entry_size + (saved rfp thru expr stack |
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62 // bottom). be sure to change this if you add/subtract anything |
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63 // to/from the overhead area |
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64 const int overhead_size = |
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65 -(frame::interpreter_frame_initial_sp_offset) + entry_size; |
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66 |
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67 const int stub_code = frame::entry_frame_after_call_words; |
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68 const int method_stack = (method->max_locals() + method->max_stack()) * |
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69 Interpreter::stackElementWords; |
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70 return (overhead_size + method_stack + stub_code); |
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71 } |
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72 |
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73 // asm based interpreter deoptimization helpers |
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74 int AbstractInterpreter::size_activation(int max_stack, |
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75 int temps, |
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76 int extra_args, |
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77 int monitors, |
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78 int callee_params, |
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79 int callee_locals, |
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80 bool is_top_frame) { |
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81 // Note: This calculation must exactly parallel the frame setup |
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82 // in TemplateInterpreterGenerator::generate_method_entry. |
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83 |
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84 // fixed size of an interpreter frame: |
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85 int overhead = frame::sender_sp_offset - |
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86 frame::interpreter_frame_initial_sp_offset; |
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87 // Our locals were accounted for by the caller (or last_frame_adjust |
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88 // on the transistion) Since the callee parameters already account |
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89 // for the callee's params we only need to account for the extra |
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90 // locals. |
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91 int size = overhead + |
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92 (callee_locals - callee_params) + |
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93 monitors * frame::interpreter_frame_monitor_size() + |
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94 // On the top frame, at all times SP <= ESP, and SP is |
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95 // 16-aligned. We ensure this by adjusting SP on method |
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96 // entry and re-entry to allow room for the maximum size of |
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97 // the expression stack. When we call another method we bump |
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98 // SP so that no stack space is wasted. So, only on the top |
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99 // frame do we need to allow max_stack words. |
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100 (is_top_frame ? max_stack : temps + extra_args); |
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101 |
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102 // On AArch64 we always keep the stack pointer 16-aligned, so we |
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103 // must round up here. |
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104 size = align_up(size, 2); |
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105 |
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106 return size; |
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107 } |
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108 |
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109 void AbstractInterpreter::layout_activation(Method* method, |
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110 int tempcount, |
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111 int popframe_extra_args, |
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112 int moncount, |
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113 int caller_actual_parameters, |
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114 int callee_param_count, |
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115 int callee_locals, |
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116 frame* caller, |
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117 frame* interpreter_frame, |
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118 bool is_top_frame, |
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119 bool is_bottom_frame) { |
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120 // The frame interpreter_frame is guaranteed to be the right size, |
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121 // as determined by a previous call to the size_activation() method. |
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122 // It is also guaranteed to be walkable even though it is in a |
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123 // skeletal state |
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124 |
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125 int max_locals = method->max_locals() * Interpreter::stackElementWords; |
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126 int extra_locals = (method->max_locals() - method->size_of_parameters()) * |
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127 Interpreter::stackElementWords; |
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128 |
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129 #ifdef ASSERT |
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130 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable"); |
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131 #endif |
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132 |
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133 interpreter_frame->interpreter_frame_set_method(method); |
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134 // NOTE the difference in using sender_sp and |
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135 // interpreter_frame_sender_sp interpreter_frame_sender_sp is |
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136 // the original sp of the caller (the unextended_sp) and |
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137 // sender_sp is fp+8/16 (32bit/64bit) XXX |
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138 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1; |
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139 |
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140 #ifdef ASSERT |
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141 if (caller->is_interpreted_frame()) { |
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142 assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement"); |
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143 } |
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144 #endif |
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145 |
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146 interpreter_frame->interpreter_frame_set_locals(locals); |
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147 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin(); |
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148 BasicObjectLock* monbot = montop - moncount; |
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149 interpreter_frame->interpreter_frame_set_monitor_end(monbot); |
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150 |
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151 // Set last_sp |
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152 intptr_t* esp = (intptr_t*) monbot - |
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153 tempcount*Interpreter::stackElementWords - |
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154 popframe_extra_args; |
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155 interpreter_frame->interpreter_frame_set_last_sp(esp); |
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156 |
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157 // All frames but the initial (oldest) interpreter frame we fill in have |
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158 // a value for sender_sp that allows walking the stack but isn't |
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159 // truly correct. Correct the value here. |
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160 if (extra_locals != 0 && |
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161 interpreter_frame->sender_sp() == |
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162 interpreter_frame->interpreter_frame_sender_sp()) { |
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163 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + |
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164 extra_locals); |
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165 } |
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166 *interpreter_frame->interpreter_frame_cache_addr() = |
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167 method->constants()->cache(); |
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168 *interpreter_frame->interpreter_frame_mirror_addr() = |
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169 method->method_holder()->java_mirror(); |
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170 } |