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1 /* |
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2 * Copyright (c) 1997, 2013, 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 SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
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26 #define SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
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27 |
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28 #include "oops/arrayOop.hpp" |
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29 #include "runtime/deoptimization.hpp" |
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30 #include "runtime/frame.inline.hpp" |
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31 #include "runtime/monitorChunk.hpp" |
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32 #include "utilities/growableArray.hpp" |
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33 |
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34 // A vframeArray is an array used for momentarily storing off stack Java method activations |
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35 // during deoptimization. Essentially it is an array of vframes where each vframe |
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36 // data is stored off stack. This structure will never exist across a safepoint so |
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37 // there is no need to gc any oops that are stored in the structure. |
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38 |
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39 |
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40 class LocalsClosure; |
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41 class ExpressionStackClosure; |
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42 class MonitorStackClosure; |
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43 class MonitorArrayElement; |
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44 class StackValueCollection; |
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45 |
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46 // A vframeArrayElement is an element of a vframeArray. Each element |
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47 // represent an interpreter frame which will eventually be created. |
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48 |
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49 class vframeArrayElement : public _ValueObj { |
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50 friend class VMStructs; |
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51 |
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52 private: |
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53 |
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54 frame _frame; // the interpreter frame we will unpack into |
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55 int _bci; // raw bci for this vframe |
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56 bool _reexecute; // whether sould we reexecute this bytecode |
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57 Method* _method; // the method for this vframe |
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58 MonitorChunk* _monitors; // active monitors for this vframe |
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59 StackValueCollection* _locals; |
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60 StackValueCollection* _expressions; |
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61 |
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62 public: |
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63 |
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64 frame* iframe(void) { return &_frame; } |
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65 |
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66 int bci(void) const; |
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67 |
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68 int raw_bci(void) const { return _bci; } |
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69 bool should_reexecute(void) const { return _reexecute; } |
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70 |
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71 Method* method(void) const { return _method; } |
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72 |
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73 MonitorChunk* monitors(void) const { return _monitors; } |
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74 |
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75 void free_monitors(JavaThread* jt); |
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76 |
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77 StackValueCollection* locals(void) const { return _locals; } |
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78 |
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79 StackValueCollection* expressions(void) const { return _expressions; } |
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80 |
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81 void fill_in(compiledVFrame* vf); |
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82 |
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83 // Formerly part of deoptimizedVFrame |
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84 |
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85 |
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86 // Returns the on stack word size for this frame |
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87 // callee_parameters is the number of callee locals residing inside this frame |
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88 int on_stack_size(int callee_parameters, |
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89 int callee_locals, |
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90 bool is_top_frame, |
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91 int popframe_extra_stack_expression_els) const; |
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92 |
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93 // Unpacks the element to skeletal interpreter frame |
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94 void unpack_on_stack(int caller_actual_parameters, |
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95 int callee_parameters, |
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96 int callee_locals, |
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97 frame* caller, |
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98 bool is_top_frame, |
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99 bool is_bottom_frame, |
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100 int exec_mode); |
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101 |
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102 #ifndef PRODUCT |
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103 void print(outputStream* st); |
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104 #endif /* PRODUCT */ |
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105 }; |
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106 |
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107 // this can be a ResourceObj if we don't save the last one... |
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108 // but it does make debugging easier even if we can't look |
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109 // at the data in each vframeElement |
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110 |
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111 class vframeArray: public CHeapObj<mtCompiler> { |
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112 friend class VMStructs; |
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113 |
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114 private: |
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115 |
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116 |
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117 // Here is what a vframeArray looks like in memory |
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118 |
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119 /* |
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120 fixed part |
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121 description of the original frame |
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122 _frames - number of vframes in this array |
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123 adapter info |
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124 callee register save area |
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125 variable part |
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126 vframeArrayElement [ 0 ] |
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127 ... |
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128 vframeArrayElement [_frames - 1] |
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129 |
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130 */ |
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131 |
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132 JavaThread* _owner_thread; |
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133 vframeArray* _next; |
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134 frame _original; // the original frame of the deoptee |
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135 frame _caller; // caller of root frame in vframeArray |
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136 frame _sender; |
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137 |
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138 Deoptimization::UnrollBlock* _unroll_block; |
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139 int _frame_size; |
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140 |
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141 int _frames; // number of javavframes in the array (does not count any adapter) |
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142 |
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143 intptr_t _callee_registers[RegisterMap::reg_count]; |
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144 unsigned char _valid[RegisterMap::reg_count]; |
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145 |
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146 vframeArrayElement _elements[1]; // First variable section. |
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147 |
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148 void fill_in_element(int index, compiledVFrame* vf); |
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149 |
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150 bool is_location_valid(int i) const { return _valid[i] != 0; } |
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151 void set_location_valid(int i, bool valid) { _valid[i] = valid; } |
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152 |
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153 public: |
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154 |
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155 |
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156 // Tells whether index is within bounds. |
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157 bool is_within_bounds(int index) const { return 0 <= index && index < frames(); } |
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158 |
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159 // Accessores for instance variable |
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160 int frames() const { return _frames; } |
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161 |
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162 static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, |
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163 RegisterMap* reg_map, frame sender, frame caller, frame self); |
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164 |
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165 |
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166 vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; } |
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167 |
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168 // Allocates a new vframe in the array and fills the array with vframe information in chunk |
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169 void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map); |
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170 |
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171 // Returns the owner of this vframeArray |
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172 JavaThread* owner_thread() const { return _owner_thread; } |
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173 |
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174 // Accessors for next |
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175 vframeArray* next() const { return _next; } |
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176 void set_next(vframeArray* value) { _next = value; } |
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177 |
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178 // Accessors for sp |
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179 intptr_t* sp() const { return _original.sp(); } |
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180 |
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181 intptr_t* unextended_sp() const { return _original.unextended_sp(); } |
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182 |
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183 address original_pc() const { return _original.pc(); } |
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184 |
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185 frame original() const { return _original; } |
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186 |
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187 frame caller() const { return _caller; } |
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188 |
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189 frame sender() const { return _sender; } |
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190 |
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191 // Accessors for unroll block |
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192 Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; } |
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193 void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; } |
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194 |
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195 // Returns the size of the frame that got deoptimized |
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196 int frame_size() const { return _frame_size; } |
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197 |
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198 // Unpack the array on the stack passed in stack interval |
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199 void unpack_to_stack(frame &unpack_frame, int exec_mode, int caller_actual_parameters); |
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200 |
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201 // Deallocates monitor chunks allocated during deoptimization. |
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202 // This should be called when the array is not used anymore. |
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203 void deallocate_monitor_chunks(); |
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204 |
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205 |
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206 |
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207 // Accessor for register map |
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208 address register_location(int i) const; |
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209 |
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210 void print_on_2(outputStream* st) PRODUCT_RETURN; |
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211 void print_value_on(outputStream* st) const PRODUCT_RETURN; |
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212 |
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213 #ifndef PRODUCT |
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214 // Comparing |
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215 bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk); |
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216 #endif |
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217 |
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218 }; |
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219 |
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220 #endif // SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |