Mercurial > hg > graal-compiler
comparison src/share/vm/runtime/vframeArray.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 9987d9d5eb0e |
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1 /* | |
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // A vframeArray is an array used for momentarily storing off stack Java method activations | |
26 // during deoptimization. Essentially it is an array of vframes where each vframe | |
27 // data is stored off stack. This structure will never exist across a safepoint so | |
28 // there is no need to gc any oops that are stored in the structure. | |
29 | |
30 | |
31 class LocalsClosure; | |
32 class ExpressionStackClosure; | |
33 class MonitorStackClosure; | |
34 class MonitorArrayElement; | |
35 class StackValueCollection; | |
36 | |
37 // A vframeArrayElement is an element of a vframeArray. Each element | |
38 // represent an interpreter frame which will eventually be created. | |
39 | |
40 class vframeArrayElement : public _ValueObj { | |
41 private: | |
42 | |
43 frame _frame; // the interpreter frame we will unpack into | |
44 int _bci; // raw bci for this vframe | |
45 methodOop _method; // the method for this vframe | |
46 MonitorChunk* _monitors; // active monitors for this vframe | |
47 StackValueCollection* _locals; | |
48 StackValueCollection* _expressions; | |
49 | |
50 public: | |
51 | |
52 frame* iframe(void) { return &_frame; } | |
53 | |
54 int bci(void) const; | |
55 | |
56 int raw_bci(void) const { return _bci; } | |
57 | |
58 methodOop method(void) const { return _method; } | |
59 | |
60 MonitorChunk* monitors(void) const { return _monitors; } | |
61 | |
62 void free_monitors(JavaThread* jt); | |
63 | |
64 StackValueCollection* locals(void) const { return _locals; } | |
65 | |
66 StackValueCollection* expressions(void) const { return _expressions; } | |
67 | |
68 void fill_in(compiledVFrame* vf); | |
69 | |
70 // Formerly part of deoptimizedVFrame | |
71 | |
72 | |
73 // Returns the on stack word size for this frame | |
74 // callee_parameters is the number of callee locals residing inside this frame | |
75 int on_stack_size(int callee_parameters, | |
76 int callee_locals, | |
77 bool is_top_frame, | |
78 int popframe_extra_stack_expression_els) const; | |
79 | |
80 // Unpacks the element to skeletal interpreter frame | |
81 void unpack_on_stack(int callee_parameters, | |
82 int callee_locals, | |
83 frame* caller, | |
84 bool is_top_frame, | |
85 int exec_mode); | |
86 | |
87 #ifndef PRODUCT | |
88 void print(outputStream* st); | |
89 #endif /* PRODUCT */ | |
90 }; | |
91 | |
92 // this can be a ResourceObj if we don't save the last one... | |
93 // but it does make debugging easier even if we can't look | |
94 // at the data in each vframeElement | |
95 | |
96 class vframeArray: public CHeapObj { | |
97 private: | |
98 | |
99 | |
100 // Here is what a vframeArray looks like in memory | |
101 | |
102 /* | |
103 fixed part | |
104 description of the original frame | |
105 _frames - number of vframes in this array | |
106 adapter info | |
107 callee register save area | |
108 variable part | |
109 vframeArrayElement [ 0 ] | |
110 ... | |
111 vframeArrayElement [_frames - 1] | |
112 | |
113 */ | |
114 | |
115 JavaThread* _owner_thread; | |
116 vframeArray* _next; | |
117 frame _original; // the original frame of the deoptee | |
118 frame _caller; // caller of root frame in vframeArray | |
119 frame _sender; | |
120 | |
121 Deoptimization::UnrollBlock* _unroll_block; | |
122 int _frame_size; | |
123 | |
124 int _frames; // number of javavframes in the array (does not count any adapter) | |
125 | |
126 intptr_t _callee_registers[RegisterMap::reg_count]; | |
127 unsigned char _valid[RegisterMap::reg_count]; | |
128 | |
129 vframeArrayElement _elements[1]; // First variable section. | |
130 | |
131 void fill_in_element(int index, compiledVFrame* vf); | |
132 | |
133 bool is_location_valid(int i) const { return _valid[i] != 0; } | |
134 void set_location_valid(int i, bool valid) { _valid[i] = valid; } | |
135 | |
136 public: | |
137 | |
138 | |
139 // Tells whether index is within bounds. | |
140 bool is_within_bounds(int index) const { return 0 <= index && index < frames(); } | |
141 | |
142 // Accessores for instance variable | |
143 int frames() const { return _frames; } | |
144 | |
145 static vframeArray* allocate(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, | |
146 RegisterMap* reg_map, frame sender, frame caller, frame self); | |
147 | |
148 | |
149 vframeArrayElement* element(int index) { assert(is_within_bounds(index), "Bad index"); return &_elements[index]; } | |
150 | |
151 // Allocates a new vframe in the array and fills the array with vframe information in chunk | |
152 void fill_in(JavaThread* thread, int frame_size, GrowableArray<compiledVFrame*>* chunk, const RegisterMap *reg_map); | |
153 | |
154 // Returns the owner of this vframeArray | |
155 JavaThread* owner_thread() const { return _owner_thread; } | |
156 | |
157 // Accessors for next | |
158 vframeArray* next() const { return _next; } | |
159 void set_next(vframeArray* value) { _next = value; } | |
160 | |
161 // Accessors for sp | |
162 intptr_t* sp() const { return _original.sp(); } | |
163 | |
164 intptr_t* unextended_sp() const { return _original.unextended_sp(); } | |
165 | |
166 address original_pc() const { return _original.pc(); } | |
167 | |
168 frame original() const { return _original; } | |
169 | |
170 frame caller() const { return _caller; } | |
171 | |
172 frame sender() const { return _sender; } | |
173 | |
174 // Accessors for unroll block | |
175 Deoptimization::UnrollBlock* unroll_block() const { return _unroll_block; } | |
176 void set_unroll_block(Deoptimization::UnrollBlock* block) { _unroll_block = block; } | |
177 | |
178 // Returns the size of the frame that got deoptimized | |
179 int frame_size() const { return _frame_size; } | |
180 | |
181 // Unpack the array on the stack passed in stack interval | |
182 void unpack_to_stack(frame &unpack_frame, int exec_mode); | |
183 | |
184 // Deallocates monitor chunks allocated during deoptimization. | |
185 // This should be called when the array is not used anymore. | |
186 void deallocate_monitor_chunks(); | |
187 | |
188 | |
189 | |
190 // Accessor for register map | |
191 address register_location(int i) const; | |
192 | |
193 void print_on_2(outputStream* st) PRODUCT_RETURN; | |
194 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
195 | |
196 #ifndef PRODUCT | |
197 // Comparing | |
198 bool structural_compare(JavaThread* thread, GrowableArray<compiledVFrame*>* chunk); | |
199 #endif | |
200 | |
201 }; |