126
127 // Physical location queries
128 bool is_register_loc() { return reg()->is_reg(); }
129 bool is_stack_loc() { return reg()->is_stack(); }
130
131 // Returns offset from sp.
132 int stack_offset() {
133 assert(is_stack_loc(), "must be stack location");
134 return reg()->reg2stack();
135 }
136
137 void print_on(outputStream* st) const;
138 void print() const { print_on(tty); }
139 };
140
141
142 class OopMap: public ResourceObj {
143 friend class OopMapStream;
144 friend class VMStructs;
145 private:
146 int _pc_offset;
147 int _omv_count;
148 int _omv_data_size;
149 unsigned char* _omv_data;
150 CompressedWriteStream* _write_stream;
151
152 debug_only( OopMapValue::oop_types* _locs_used; int _locs_length;)
153
154 // Accessors
155 unsigned char* omv_data() const { return _omv_data; }
156 void set_omv_data(unsigned char* value) { _omv_data = value; }
157 int omv_data_size() const { return _omv_data_size; }
158 void set_omv_data_size(int value) { _omv_data_size = value; }
159 int omv_count() const { return _omv_count; }
160 void set_omv_count(int value) { _omv_count = value; }
161 void increment_count() { _omv_count++; }
162 CompressedWriteStream* write_stream() const { return _write_stream; }
163 void set_write_stream(CompressedWriteStream* value) { _write_stream = value; }
164
165 private:
166 enum DeepCopyToken { _deep_copy_token };
167 OopMap(DeepCopyToken, OopMap* source); // used only by deep_copy
168
169 public:
170 OopMap(int frame_size, int arg_count);
171
172 // pc-offset handling
173 int offset() const { return _pc_offset; }
174 void set_offset(int o) { _pc_offset = o; }
175
176 // Check to avoid double insertion
177 debug_only(OopMapValue::oop_types locs_used( int indx ) { return _locs_used[indx]; })
178
179 // Construction
180 // frame_size units are stack-slots (4 bytes) NOT intptr_t; we can name odd
181 // slots to hold 4-byte values like ints and floats in the LP64 build.
182 void set_oop ( VMReg local);
183 void set_value( VMReg local);
184 void set_narrowoop(VMReg local);
185 void set_dead ( VMReg local);
186 void set_callee_saved( VMReg local, VMReg caller_machine_register );
187 void set_derived_oop ( VMReg local, VMReg derived_from_local_register );
188 void set_xxx(VMReg reg, OopMapValue::oop_types x, VMReg optional);
189
190 int heap_size() const;
191 void copy_to(address addr);
192 OopMap* deep_copy();
193
194 bool has_derived_pointer() const PRODUCT_RETURN0;
195
196 bool legal_vm_reg_name(VMReg local) {
197 return OopMapValue::legal_vm_reg_name(local);
198 }
199
200 // Printing
201 void print_on(outputStream* st) const;
202 void print() const { print_on(tty); }
203 };
204
205
206 class OopMapSet : public ResourceObj {
207 friend class VMStructs;
208 private:
209 int _om_count;
210 int _om_size;
211 OopMap** _om_data;
212
213 int om_count() const { return _om_count; }
214 void set_om_count(int value) { _om_count = value; }
215 void increment_count() { _om_count++; }
216 int om_size() const { return _om_size; }
217 void set_om_size(int value) { _om_size = value; }
218 OopMap** om_data() const { return _om_data; }
219 void set_om_data(OopMap** value) { _om_data = value; }
220 void grow_om_data();
221 void set(int index,OopMap* value) { assert((index == 0) || ((index > 0) && (index < om_size())),"bad index"); _om_data[index] = value; }
222
223 public:
224 OopMapSet();
225
226 // returns the number of OopMaps in this OopMapSet
227 int size() const { return _om_count; }
228 // returns the OopMap at a given index
229 OopMap* at(int index) const { assert((index >= 0) && (index <= om_count()),"bad index"); return _om_data[index]; }
230
231 // Collect OopMaps.
232 void add_gc_map(int pc, OopMap* map);
233
234 // Returns the only oop map. Used for reconstructing
235 // Adapter frames during deoptimization
236 OopMap* singular_oop_map();
237
238 // returns OopMap in that is anchored to the pc
239 OopMap* find_map_at_offset(int pc_offset) const;
240
241 int heap_size() const;
242 void copy_to(address addr);
243
244 // Methods oops_do() and all_do() filter out NULL oops and
245 // oop == Universe::narrow_oop_base() before passing oops
246 // to closures.
247
248 // Iterates through frame for a compiled method
249 static void oops_do (const frame* fr,
250 const RegisterMap* reg_map, OopClosure* f);
251 static void update_register_map(const frame* fr, RegisterMap *reg_map);
252
253 // Iterates through frame for a compiled method for dead ones and values, too
254 static void all_do(const frame* fr, const RegisterMap* reg_map,
255 OopClosure* oop_fn,
256 void derived_oop_fn(oop* base, oop* derived),
257 OopClosure* value_fn);
258
259 // Printing
260 void print_on(outputStream* st) const;
261 void print() const { print_on(tty); }
262 };
263
264
265 class OopMapStream : public StackObj {
266 private:
267 CompressedReadStream* _stream;
268 int _mask;
269 int _size;
270 int _position;
271 bool _valid_omv;
272 OopMapValue _omv;
273 void find_next();
274
275 public:
276 OopMapStream(OopMap* oop_map);
277 OopMapStream(OopMap* oop_map, int oop_types_mask);
278 bool is_done() { if(!_valid_omv) { find_next(); } return !_valid_omv; }
279 void next() { find_next(); }
280 OopMapValue current() { return _omv; }
281 };
282
283
284 // Derived pointer support. This table keeps track of all derived points on a
285 // stack. It is cleared before each scavenge/GC. During the traversal of all
286 // oops, it is filled in with references to all locations that contains a
287 // derived oop (assumed to be very few). When the GC is complete, the derived
288 // pointers are updated based on their base pointers new value and an offset.
289 #ifdef COMPILER2
290 class DerivedPointerTable : public AllStatic {
291 friend class VMStructs;
292 private:
293 static GrowableArray<DerivedPointerEntry*>* _list;
294 static bool _active; // do not record pointers for verify pass etc.
295 public:
296 static void clear(); // Called before scavenge/GC
297 static void add(oop *derived, oop *base); // Called during scavenge/GC
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126
127 // Physical location queries
128 bool is_register_loc() { return reg()->is_reg(); }
129 bool is_stack_loc() { return reg()->is_stack(); }
130
131 // Returns offset from sp.
132 int stack_offset() {
133 assert(is_stack_loc(), "must be stack location");
134 return reg()->reg2stack();
135 }
136
137 void print_on(outputStream* st) const;
138 void print() const { print_on(tty); }
139 };
140
141
142 class OopMap: public ResourceObj {
143 friend class OopMapStream;
144 friend class VMStructs;
145 private:
146 int _pc_offset; // offset in the code that this OopMap corresponds to
147 int _omv_count; // number of OopMapValues in the stream
148 CompressedWriteStream* _write_stream;
149
150 debug_only( OopMapValue::oop_types* _locs_used; int _locs_length;)
151
152 // Accessors
153 int omv_count() const { return _omv_count; }
154 void set_omv_count(int value) { _omv_count = value; }
155 void increment_count() { _omv_count++; }
156 CompressedWriteStream* write_stream() const { return _write_stream; }
157 void set_write_stream(CompressedWriteStream* value) { _write_stream = value; }
158
159 private:
160 enum DeepCopyToken { _deep_copy_token };
161 OopMap(DeepCopyToken, OopMap* source); // used only by deep_copy
162
163 public:
164 OopMap(int frame_size, int arg_count);
165
166 // pc-offset handling
167 int offset() const { return _pc_offset; }
168 void set_offset(int o) { _pc_offset = o; }
169 int count() const { return _omv_count; }
170 int data_size() const { return write_stream()->position(); }
171 address data() const { return write_stream()->buffer(); }
172
173 // Check to avoid double insertion
174 debug_only(OopMapValue::oop_types locs_used( int indx ) { return _locs_used[indx]; })
175
176 // Construction
177 // frame_size units are stack-slots (4 bytes) NOT intptr_t; we can name odd
178 // slots to hold 4-byte values like ints and floats in the LP64 build.
179 void set_oop ( VMReg local);
180 void set_value( VMReg local);
181 void set_narrowoop(VMReg local);
182 void set_dead ( VMReg local);
183 void set_callee_saved( VMReg local, VMReg caller_machine_register );
184 void set_derived_oop ( VMReg local, VMReg derived_from_local_register );
185 void set_xxx(VMReg reg, OopMapValue::oop_types x, VMReg optional);
186
187 int heap_size() const;
188 void copy_data_to(address addr) const;
189 OopMap* deep_copy();
190
191 bool legal_vm_reg_name(VMReg local) {
192 return OopMapValue::legal_vm_reg_name(local);
193 }
194
195 // Printing
196 void print_on(outputStream* st) const;
197 void print() const { print_on(tty); }
198 bool equals(const OopMap* other) const;
199 };
200
201
202 class OopMapSet : public ResourceObj {
203 friend class VMStructs;
204 private:
205 int _om_count;
206 int _om_size;
207 OopMap** _om_data;
208
209 int om_count() const { return _om_count; }
210 void set_om_count(int value) { _om_count = value; }
211 void increment_count() { _om_count++; }
212 int om_size() const { return _om_size; }
213 void set_om_size(int value) { _om_size = value; }
214 OopMap** om_data() const { return _om_data; }
215 void set_om_data(OopMap** value) { _om_data = value; }
216 void grow_om_data();
217 void set(int index,OopMap* value) { assert((index == 0) || ((index > 0) && (index < om_size())),"bad index"); _om_data[index] = value; }
218
219 public:
220 OopMapSet();
221
222 // returns the number of OopMaps in this OopMapSet
223 int size() const { return _om_count; }
224 // returns the OopMap at a given index
225 OopMap* at(int index) const { assert((index >= 0) && (index <= om_count()),"bad index"); return _om_data[index]; }
226
227 // Collect OopMaps.
228 void add_gc_map(int pc, OopMap* map);
229
230 // Returns the only oop map. Used for reconstructing
231 // Adapter frames during deoptimization
232 OopMap* singular_oop_map();
233
234 // returns OopMap in that is anchored to the pc
235 OopMap* find_map_at_offset(int pc_offset) const;
236
237 int heap_size() const;
238
239 // Methods oops_do() and all_do() filter out NULL oops and
240 // oop == Universe::narrow_oop_base() before passing oops
241 // to closures.
242
243 // Iterates through frame for a compiled method
244 static void oops_do (const frame* fr,
245 const RegisterMap* reg_map, OopClosure* f);
246 static void update_register_map(const frame* fr, RegisterMap *reg_map);
247
248 // Iterates through frame for a compiled method for dead ones and values, too
249 static void all_do(const frame* fr, const RegisterMap* reg_map,
250 OopClosure* oop_fn,
251 void derived_oop_fn(oop* base, oop* derived),
252 OopClosure* value_fn);
253
254 // Printing
255 void print_on(outputStream* st) const;
256 void print() const { print_on(tty); }
257 };
258
259 class ImmutableOopMapBuilder;
260
261 class ImmutableOopMap {
262 friend class OopMapStream;
263 friend class VMStructs;
264 #ifdef ASSERT
265 friend class ImmutableOopMapBuilder;
266 #endif
267 private:
268 int _count; // contains the number of entries in this OopMap
269
270 address data_addr() const { return (address) this + sizeof(ImmutableOopMap); }
271 public:
272 ImmutableOopMap(const OopMap* oopmap);
273
274 bool has_derived_pointer() const PRODUCT_RETURN0;
275 int count() const { return _count; }
276
277 // Printing
278 void print_on(outputStream* st) const;
279 void print() const { print_on(tty); }
280 };
281
282 class ImmutableOopMapSet;
283 class ImmutableOopMap;
284 class OopMapSet;
285
286 class ImmutableOopMapPair {
287 friend class VMStructs;
288 private:
289 int _pc_offset; // program counter offset from the beginning of the method
290 int _oopmap_offset; // offset in the data in the ImmutableOopMapSet where the ImmutableOopMap is located
291 public:
292 ImmutableOopMapPair(int pc_offset, int oopmap_offset) : _pc_offset(pc_offset), _oopmap_offset(oopmap_offset) {
293 assert(pc_offset >= 0 && oopmap_offset >= 0, "check");
294 }
295 const ImmutableOopMap* get_from(const ImmutableOopMapSet* set) const;
296
297 int pc_offset() const { return _pc_offset; }
298 int oopmap_offset() const { return _oopmap_offset; }
299 };
300
301 class ImmutableOopMapSet {
302 friend class VMStructs;
303 private:
304 int _count; // nr of ImmutableOopMapPairs in the Set
305 int _size; // nr of bytes including ImmutableOopMapSet itself
306
307 address data() const { return (address) this + sizeof(*this) + sizeof(ImmutableOopMapPair) * _count; }
308
309 public:
310 ImmutableOopMapSet(const OopMapSet* oopmap_set, int size) : _count(oopmap_set->size()), _size(size) {}
311
312 ImmutableOopMap* oopmap_at_offset(int offset) const {
313 assert(offset >= 0 && offset < _size, "must be within boundaries");
314 address addr = data() + offset;
315 return (ImmutableOopMap*) addr;
316 }
317
318 ImmutableOopMapPair* get_pairs() const { return (ImmutableOopMapPair*) ((address) this + sizeof(*this)); }
319
320 static ImmutableOopMapSet* build_from(const OopMapSet* oopmap_set);
321
322 const ImmutableOopMap* find_map_at_offset(int pc_offset) const;
323
324 const ImmutableOopMapPair* pair_at(int index) const { assert(index >= 0 && index < _count, "check"); return &get_pairs()[index]; }
325
326 int count() const { return _count; }
327 int size() const { return _size; }
328
329 void print_on(outputStream* st) const;
330 void print() const { print_on(tty); }
331 };
332
333 class OopMapStream : public StackObj {
334 private:
335 CompressedReadStream* _stream;
336 int _mask;
337 int _size;
338 int _position;
339 bool _valid_omv;
340 OopMapValue _omv;
341 void find_next();
342
343 public:
344 OopMapStream(OopMap* oop_map, int oop_types_mask = OopMapValue::type_mask_in_place);
345 OopMapStream(const ImmutableOopMap* oop_map, int oop_types_mask = OopMapValue::type_mask_in_place);
346 bool is_done() { if(!_valid_omv) { find_next(); } return !_valid_omv; }
347 void next() { find_next(); }
348 OopMapValue current() { return _omv; }
349 };
350
351
352 // Derived pointer support. This table keeps track of all derived points on a
353 // stack. It is cleared before each scavenge/GC. During the traversal of all
354 // oops, it is filled in with references to all locations that contains a
355 // derived oop (assumed to be very few). When the GC is complete, the derived
356 // pointers are updated based on their base pointers new value and an offset.
357 #ifdef COMPILER2
358 class DerivedPointerTable : public AllStatic {
359 friend class VMStructs;
360 private:
361 static GrowableArray<DerivedPointerEntry*>* _list;
362 static bool _active; // do not record pointers for verify pass etc.
363 public:
364 static void clear(); // Called before scavenge/GC
365 static void add(oop *derived, oop *base); // Called during scavenge/GC
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