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annotate src/share/vm/runtime/vframeArray.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
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Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | 0bf37f737702 |
| children | 52b4284cb496 d3f3f7677537 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |
| 26 #define SHARE_VM_RUNTIME_VFRAMEARRAY_HPP | |
| 27 | |
| 28 #include "oops/arrayOop.hpp" | |
| 29 #include "runtime/deoptimization.hpp" | |
| 30 #include "runtime/frame.inline.hpp" | |
| 31 #include "runtime/monitorChunk.hpp" | |
| 32 #include "utilities/growableArray.hpp" | |
| 33 | |
| 0 | 34 // A vframeArray is an array used for momentarily storing off stack Java method activations |
| 35 // during deoptimization. Essentially it is an array of vframes where each vframe | |
| 36 // data is stored off stack. This structure will never exist across a safepoint so | |
| 37 // there is no need to gc any oops that are stored in the structure. | |
| 38 | |
| 39 | |
| 40 class LocalsClosure; | |
| 41 class ExpressionStackClosure; | |
| 42 class MonitorStackClosure; | |
| 43 class MonitorArrayElement; | |
| 44 class StackValueCollection; | |
| 45 | |
| 46 // A vframeArrayElement is an element of a vframeArray. Each element | |
| 47 // represent an interpreter frame which will eventually be created. | |
| 48 | |
| 49 class vframeArrayElement : public _ValueObj { | |
| 3939 | 50 friend class VMStructs; |
| 51 | |
| 0 | 52 private: |
| 53 | |
| 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 |
| 0 | 58 MonitorChunk* _monitors; // active monitors for this vframe |
| 59 StackValueCollection* _locals; | |
| 60 StackValueCollection* _expressions; | |
| 61 | |
| 62 public: | |
| 63 | |
| 64 frame* iframe(void) { return &_frame; } | |
| 65 | |
| 66 int bci(void) const; | |
| 67 | |
| 68 int raw_bci(void) const { return _bci; } | |
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69 bool should_reexecute(void) const { return _reexecute; } |
| 0 | 70 |
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71 Method* method(void) const { return _method; } |
| 0 | 72 |
| 73 MonitorChunk* monitors(void) const { return _monitors; } | |
| 74 | |
| 75 void free_monitors(JavaThread* jt); | |
| 76 | |
| 77 StackValueCollection* locals(void) const { return _locals; } | |
| 78 | |
| 79 StackValueCollection* expressions(void) const { return _expressions; } | |
| 80 | |
| 81 void fill_in(compiledVFrame* vf); | |
| 82 | |
| 83 // Formerly part of deoptimizedVFrame | |
| 84 | |
| 85 | |
| 86 // Returns the on stack word size for this frame | |
| 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, |
| 0 | 89 int callee_locals, |
| 90 bool is_top_frame, | |
| 91 int popframe_extra_stack_expression_els) const; | |
| 92 | |
| 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, |
| 0 | 96 int callee_locals, |
| 97 frame* caller, | |
| 98 bool is_top_frame, | |
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99 bool is_bottom_frame, |
| 0 | 100 int exec_mode); |
| 101 | |
| 102 #ifndef PRODUCT | |
| 103 void print(outputStream* st); | |
| 104 #endif /* PRODUCT */ | |
| 105 }; | |
| 106 | |
| 107 // this can be a ResourceObj if we don't save the last one... | |
| 108 // but it does make debugging easier even if we can't look | |
| 109 // at the data in each vframeElement | |
| 110 | |
| 6197 | 111 class vframeArray: public CHeapObj<mtCompiler> { |
| 3939 | 112 friend class VMStructs; |
| 113 | |
| 0 | 114 private: |
| 115 | |
| 116 | |
| 117 // Here is what a vframeArray looks like in memory | |
| 118 | |
| 119 /* | |
| 120 fixed part | |
| 121 description of the original frame | |
| 122 _frames - number of vframes in this array | |
| 123 adapter info | |
| 124 callee register save area | |
| 125 variable part | |
| 126 vframeArrayElement [ 0 ] | |
| 127 ... | |
| 128 vframeArrayElement [_frames - 1] | |
| 129 | |
| 130 */ | |
| 131 | |
| 132 JavaThread* _owner_thread; | |
| 133 vframeArray* _next; | |
| 134 frame _original; // the original frame of the deoptee | |
| 135 frame _caller; // caller of root frame in vframeArray | |
| 136 frame _sender; | |
| 137 | |
| 138 Deoptimization::UnrollBlock* _unroll_block; | |
| 139 int _frame_size; | |
| 140 | |
| 141 int _frames; // number of javavframes in the array (does not count any adapter) | |
| 142 | |
| 143 intptr_t _callee_registers[RegisterMap::reg_count]; | |
| 144 unsigned char _valid[RegisterMap::reg_count]; | |
| 145 | |
| 146 vframeArrayElement _elements[1]; // First variable section. | |
| 147 | |
| 148 void fill_in_element(int index, compiledVFrame* vf); | |
| 149 | |
| 150 bool is_location_valid(int i) const { return _valid[i] != 0; } | |
| 151 void set_location_valid(int i, bool valid) { _valid[i] = valid; } | |
| 152 | |
| 153 public: | |
| 154 | |
| 155 | |
| 156 // Tells whether index is within bounds. | |
| 157 bool is_within_bounds(int index) const { return 0 <= index && index < frames(); } | |
| 158 | |
| 159 // Accessores for instance variable | |
| 160 int frames() const { return _frames; } | |
| 161 | |
| 162 static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, | |
| 163 RegisterMap* reg_map, frame sender, frame caller, frame self); | |
| 164 | |
| 165 | |
| 166 vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; } | |
| 167 | |
| 168 // Allocates a new vframe in the array and fills the array with vframe information in chunk | |
| 169 void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map); | |
| 170 | |
| 171 // Returns the owner of this vframeArray | |
| 172 JavaThread* owner_thread() const { return _owner_thread; } | |
| 173 | |
| 174 // Accessors for next | |
| 175 vframeArray* next() const { return _next; } | |
| 176 void set_next(vframeArray* value) { _next = value; } | |
| 177 | |
| 178 // Accessors for sp | |
| 179 intptr_t* sp() const { return _original.sp(); } | |
| 180 | |
| 181 intptr_t* unextended_sp() const { return _original.unextended_sp(); } | |
| 182 | |
| 183 address original_pc() const { return _original.pc(); } | |
| 184 | |
| 185 frame original() const { return _original; } | |
| 186 | |
| 187 frame caller() const { return _caller; } | |
| 188 | |
| 189 frame sender() const { return _sender; } | |
| 190 | |
| 191 // Accessors for unroll block | |
| 192 Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; } | |
| 193 void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; } | |
| 194 | |
| 195 // Returns the size of the frame that got deoptimized | |
| 196 int frame_size() const { return _frame_size; } | |
| 197 | |
| 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); |
| 0 | 200 |
| 201 // Deallocates monitor chunks allocated during deoptimization. | |
| 202 // This should be called when the array is not used anymore. | |
| 203 void deallocate_monitor_chunks(); | |
| 204 | |
| 205 | |
| 206 | |
| 207 // Accessor for register map | |
| 208 address register_location(int i) const; | |
| 209 | |
| 210 void print_on_2(outputStream* st) PRODUCT_RETURN; | |
| 211 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
| 212 | |
| 213 #ifndef PRODUCT | |
| 214 // Comparing | |
| 215 bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk); | |
| 216 #endif | |
| 217 | |
| 218 }; | |
| 1972 | 219 |
| 220 #endif // SHARE_VM_RUNTIME_VFRAMEARRAY_HPP |