Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodDataOop.hpp @ 1257:7b4415a18c8a
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author | kvn |
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date | Fri, 12 Feb 2010 15:27:36 -0800 |
parents | 576e77447e3c |
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0 | 1 /* |
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2 * Copyright 2000-2010 Sun Microsystems, Inc. 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 * | |
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 class BytecodeStream; | |
26 | |
27 // The MethodData object collects counts and other profile information | |
28 // during zeroth-tier (interpretive) and first-tier execution. | |
29 // The profile is used later by compilation heuristics. Some heuristics | |
30 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
31 // optimization often has a down-side, a corner case that it handles | |
32 // poorly, but which is thought to be rare. The profile provides | |
33 // evidence of this rarity for a given method or even BCI. It allows | |
34 // the compiler to back out of the optimization at places where it | |
35 // has historically been a poor choice. Other heuristics try to use | |
36 // specific information gathered about types observed at a given site. | |
37 // | |
38 // All data in the profile is approximate. It is expected to be accurate | |
39 // on the whole, but the system expects occasional inaccuraces, due to | |
40 // counter overflow, multiprocessor races during data collection, space | |
41 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
42 // optimization quality but will not affect correctness. Also, each MDO | |
43 // is marked with its birth-date ("creation_mileage") which can be used | |
44 // to assess the quality ("maturity") of its data. | |
45 // | |
46 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
47 // state. Also, certain recorded per-BCI events are given one-bit counters | |
48 // which overflow to a saturated state which applied to all counters at | |
49 // that BCI. In other words, there is a small lattice which approximates | |
50 // the ideal of an infinite-precision counter for each event at each BCI, | |
51 // and the lattice quickly "bottoms out" in a state where all counters | |
52 // are taken to be indefinitely large. | |
53 // | |
54 // The reader will find many data races in profile gathering code, starting | |
55 // with invocation counter incrementation. None of these races harm correct | |
56 // execution of the compiled code. | |
57 | |
941 | 58 // forward decl |
59 class ProfileData; | |
60 | |
0 | 61 // DataLayout |
62 // | |
63 // Overlay for generic profiling data. | |
64 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
65 private: | |
66 // Every data layout begins with a header. This header | |
67 // contains a tag, which is used to indicate the size/layout | |
68 // of the data, 4 bits of flags, which can be used in any way, | |
69 // 4 bits of trap history (none/one reason/many reasons), | |
70 // and a bci, which is used to tie this piece of data to a | |
71 // specific bci in the bytecodes. | |
72 union { | |
73 intptr_t _bits; | |
74 struct { | |
75 u1 _tag; | |
76 u1 _flags; | |
77 u2 _bci; | |
78 } _struct; | |
79 } _header; | |
80 | |
81 // The data layout has an arbitrary number of cells, each sized | |
82 // to accomodate a pointer or an integer. | |
83 intptr_t _cells[1]; | |
84 | |
85 // Some types of data layouts need a length field. | |
86 static bool needs_array_len(u1 tag); | |
87 | |
88 public: | |
89 enum { | |
90 counter_increment = 1 | |
91 }; | |
92 | |
93 enum { | |
94 cell_size = sizeof(intptr_t) | |
95 }; | |
96 | |
97 // Tag values | |
98 enum { | |
99 no_tag, | |
100 bit_data_tag, | |
101 counter_data_tag, | |
102 jump_data_tag, | |
103 receiver_type_data_tag, | |
104 virtual_call_data_tag, | |
105 ret_data_tag, | |
106 branch_data_tag, | |
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107 multi_branch_data_tag, |
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108 arg_info_data_tag |
0 | 109 }; |
110 | |
111 enum { | |
112 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
113 // The trap state breaks down further as [recompile:1 | reason:3]. | |
114 // This further breakdown is defined in deoptimization.cpp. | |
115 // See Deoptimization::trap_state_reason for an assert that | |
116 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
117 // | |
118 // The trap_state is collected only if ProfileTraps is true. | |
119 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
120 trap_shift = BitsPerByte - trap_bits, | |
121 trap_mask = right_n_bits(trap_bits), | |
122 trap_mask_in_place = (trap_mask << trap_shift), | |
123 flag_limit = trap_shift, | |
124 flag_mask = right_n_bits(flag_limit), | |
125 first_flag = 0 | |
126 }; | |
127 | |
128 // Size computation | |
129 static int header_size_in_bytes() { | |
130 return cell_size; | |
131 } | |
132 static int header_size_in_cells() { | |
133 return 1; | |
134 } | |
135 | |
136 static int compute_size_in_bytes(int cell_count) { | |
137 return header_size_in_bytes() + cell_count * cell_size; | |
138 } | |
139 | |
140 // Initialization | |
141 void initialize(u1 tag, u2 bci, int cell_count); | |
142 | |
143 // Accessors | |
144 u1 tag() { | |
145 return _header._struct._tag; | |
146 } | |
147 | |
148 // Return a few bits of trap state. Range is [0..trap_mask]. | |
149 // The state tells if traps with zero, one, or many reasons have occurred. | |
150 // It also tells whether zero or many recompilations have occurred. | |
151 // The associated trap histogram in the MDO itself tells whether | |
152 // traps are common or not. If a BCI shows that a trap X has | |
153 // occurred, and the MDO shows N occurrences of X, we make the | |
154 // simplifying assumption that all N occurrences can be blamed | |
155 // on that BCI. | |
156 int trap_state() { | |
157 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
158 } | |
159 | |
160 void set_trap_state(int new_state) { | |
161 assert(ProfileTraps, "used only under +ProfileTraps"); | |
162 uint old_flags = (_header._struct._flags & flag_mask); | |
163 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
164 } | |
165 | |
166 u1 flags() { | |
167 return _header._struct._flags; | |
168 } | |
169 | |
170 u2 bci() { | |
171 return _header._struct._bci; | |
172 } | |
173 | |
174 void set_header(intptr_t value) { | |
175 _header._bits = value; | |
176 } | |
177 void release_set_header(intptr_t value) { | |
178 OrderAccess::release_store_ptr(&_header._bits, value); | |
179 } | |
180 intptr_t header() { | |
181 return _header._bits; | |
182 } | |
183 void set_cell_at(int index, intptr_t value) { | |
184 _cells[index] = value; | |
185 } | |
186 void release_set_cell_at(int index, intptr_t value) { | |
187 OrderAccess::release_store_ptr(&_cells[index], value); | |
188 } | |
189 intptr_t cell_at(int index) { | |
190 return _cells[index]; | |
191 } | |
192 intptr_t* adr_cell_at(int index) { | |
193 return &_cells[index]; | |
194 } | |
195 oop* adr_oop_at(int index) { | |
196 return (oop*)&(_cells[index]); | |
197 } | |
198 | |
199 void set_flag_at(int flag_number) { | |
200 assert(flag_number < flag_limit, "oob"); | |
201 _header._struct._flags |= (0x1 << flag_number); | |
202 } | |
203 bool flag_at(int flag_number) { | |
204 assert(flag_number < flag_limit, "oob"); | |
205 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
206 } | |
207 | |
208 // Low-level support for code generation. | |
209 static ByteSize header_offset() { | |
210 return byte_offset_of(DataLayout, _header); | |
211 } | |
212 static ByteSize tag_offset() { | |
213 return byte_offset_of(DataLayout, _header._struct._tag); | |
214 } | |
215 static ByteSize flags_offset() { | |
216 return byte_offset_of(DataLayout, _header._struct._flags); | |
217 } | |
218 static ByteSize bci_offset() { | |
219 return byte_offset_of(DataLayout, _header._struct._bci); | |
220 } | |
221 static ByteSize cell_offset(int index) { | |
222 return byte_offset_of(DataLayout, _cells[index]); | |
223 } | |
224 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
225 static int flag_number_to_byte_constant(int flag_number) { | |
226 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
227 DataLayout temp; temp.set_header(0); | |
228 temp.set_flag_at(flag_number); | |
229 return temp._header._struct._flags; | |
230 } | |
231 // Return a value which, when or-ed as a word into _header, sets the flag. | |
232 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
233 DataLayout temp; temp.set_header(0); | |
234 temp._header._struct._flags = byte_constant; | |
235 return temp._header._bits; | |
236 } | |
941 | 237 |
238 // GC support | |
239 ProfileData* data_in(); | |
240 void follow_weak_refs(BoolObjectClosure* cl); | |
0 | 241 }; |
242 | |
243 | |
244 // ProfileData class hierarchy | |
245 class ProfileData; | |
246 class BitData; | |
247 class CounterData; | |
248 class ReceiverTypeData; | |
249 class VirtualCallData; | |
250 class RetData; | |
251 class JumpData; | |
252 class BranchData; | |
253 class ArrayData; | |
254 class MultiBranchData; | |
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255 class ArgInfoData; |
0 | 256 |
257 | |
258 // ProfileData | |
259 // | |
260 // A ProfileData object is created to refer to a section of profiling | |
261 // data in a structured way. | |
262 class ProfileData : public ResourceObj { | |
263 private: | |
264 #ifndef PRODUCT | |
265 enum { | |
266 tab_width_one = 16, | |
267 tab_width_two = 36 | |
268 }; | |
269 #endif // !PRODUCT | |
270 | |
271 // This is a pointer to a section of profiling data. | |
272 DataLayout* _data; | |
273 | |
274 protected: | |
275 DataLayout* data() { return _data; } | |
276 | |
277 enum { | |
278 cell_size = DataLayout::cell_size | |
279 }; | |
280 | |
281 public: | |
282 // How many cells are in this? | |
283 virtual int cell_count() { | |
284 ShouldNotReachHere(); | |
285 return -1; | |
286 } | |
287 | |
288 // Return the size of this data. | |
289 int size_in_bytes() { | |
290 return DataLayout::compute_size_in_bytes(cell_count()); | |
291 } | |
292 | |
293 protected: | |
294 // Low-level accessors for underlying data | |
295 void set_intptr_at(int index, intptr_t value) { | |
296 assert(0 <= index && index < cell_count(), "oob"); | |
297 data()->set_cell_at(index, value); | |
298 } | |
299 void release_set_intptr_at(int index, intptr_t value) { | |
300 assert(0 <= index && index < cell_count(), "oob"); | |
301 data()->release_set_cell_at(index, value); | |
302 } | |
303 intptr_t intptr_at(int index) { | |
304 assert(0 <= index && index < cell_count(), "oob"); | |
305 return data()->cell_at(index); | |
306 } | |
307 void set_uint_at(int index, uint value) { | |
308 set_intptr_at(index, (intptr_t) value); | |
309 } | |
310 void release_set_uint_at(int index, uint value) { | |
311 release_set_intptr_at(index, (intptr_t) value); | |
312 } | |
313 uint uint_at(int index) { | |
314 return (uint)intptr_at(index); | |
315 } | |
316 void set_int_at(int index, int value) { | |
317 set_intptr_at(index, (intptr_t) value); | |
318 } | |
319 void release_set_int_at(int index, int value) { | |
320 release_set_intptr_at(index, (intptr_t) value); | |
321 } | |
322 int int_at(int index) { | |
323 return (int)intptr_at(index); | |
324 } | |
325 int int_at_unchecked(int index) { | |
326 return (int)data()->cell_at(index); | |
327 } | |
328 void set_oop_at(int index, oop value) { | |
329 set_intptr_at(index, (intptr_t) value); | |
330 } | |
331 oop oop_at(int index) { | |
332 return (oop)intptr_at(index); | |
333 } | |
334 oop* adr_oop_at(int index) { | |
335 assert(0 <= index && index < cell_count(), "oob"); | |
336 return data()->adr_oop_at(index); | |
337 } | |
338 | |
339 void set_flag_at(int flag_number) { | |
340 data()->set_flag_at(flag_number); | |
341 } | |
342 bool flag_at(int flag_number) { | |
343 return data()->flag_at(flag_number); | |
344 } | |
345 | |
346 // two convenient imports for use by subclasses: | |
347 static ByteSize cell_offset(int index) { | |
348 return DataLayout::cell_offset(index); | |
349 } | |
350 static int flag_number_to_byte_constant(int flag_number) { | |
351 return DataLayout::flag_number_to_byte_constant(flag_number); | |
352 } | |
353 | |
354 ProfileData(DataLayout* data) { | |
355 _data = data; | |
356 } | |
357 | |
358 public: | |
359 // Constructor for invalid ProfileData. | |
360 ProfileData(); | |
361 | |
362 u2 bci() { | |
363 return data()->bci(); | |
364 } | |
365 | |
366 address dp() { | |
367 return (address)_data; | |
368 } | |
369 | |
370 int trap_state() { | |
371 return data()->trap_state(); | |
372 } | |
373 void set_trap_state(int new_state) { | |
374 data()->set_trap_state(new_state); | |
375 } | |
376 | |
377 // Type checking | |
378 virtual bool is_BitData() { return false; } | |
379 virtual bool is_CounterData() { return false; } | |
380 virtual bool is_JumpData() { return false; } | |
381 virtual bool is_ReceiverTypeData(){ return false; } | |
382 virtual bool is_VirtualCallData() { return false; } | |
383 virtual bool is_RetData() { return false; } | |
384 virtual bool is_BranchData() { return false; } | |
385 virtual bool is_ArrayData() { return false; } | |
386 virtual bool is_MultiBranchData() { return false; } | |
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387 virtual bool is_ArgInfoData() { return false; } |
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388 |
0 | 389 |
390 BitData* as_BitData() { | |
391 assert(is_BitData(), "wrong type"); | |
392 return is_BitData() ? (BitData*) this : NULL; | |
393 } | |
394 CounterData* as_CounterData() { | |
395 assert(is_CounterData(), "wrong type"); | |
396 return is_CounterData() ? (CounterData*) this : NULL; | |
397 } | |
398 JumpData* as_JumpData() { | |
399 assert(is_JumpData(), "wrong type"); | |
400 return is_JumpData() ? (JumpData*) this : NULL; | |
401 } | |
402 ReceiverTypeData* as_ReceiverTypeData() { | |
403 assert(is_ReceiverTypeData(), "wrong type"); | |
404 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
405 } | |
406 VirtualCallData* as_VirtualCallData() { | |
407 assert(is_VirtualCallData(), "wrong type"); | |
408 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
409 } | |
410 RetData* as_RetData() { | |
411 assert(is_RetData(), "wrong type"); | |
412 return is_RetData() ? (RetData*) this : NULL; | |
413 } | |
414 BranchData* as_BranchData() { | |
415 assert(is_BranchData(), "wrong type"); | |
416 return is_BranchData() ? (BranchData*) this : NULL; | |
417 } | |
418 ArrayData* as_ArrayData() { | |
419 assert(is_ArrayData(), "wrong type"); | |
420 return is_ArrayData() ? (ArrayData*) this : NULL; | |
421 } | |
422 MultiBranchData* as_MultiBranchData() { | |
423 assert(is_MultiBranchData(), "wrong type"); | |
424 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
425 } | |
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426 ArgInfoData* as_ArgInfoData() { |
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427 assert(is_ArgInfoData(), "wrong type"); |
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428 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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429 } |
0 | 430 |
431 | |
432 // Subclass specific initialization | |
433 virtual void post_initialize(BytecodeStream* stream, methodDataOop mdo) {} | |
434 | |
435 // GC support | |
436 virtual void follow_contents() {} | |
437 virtual void oop_iterate(OopClosure* blk) {} | |
438 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr) {} | |
439 virtual void adjust_pointers() {} | |
941 | 440 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure) {} |
0 | 441 |
442 #ifndef SERIALGC | |
443 // Parallel old support | |
444 virtual void follow_contents(ParCompactionManager* cm) {} | |
445 virtual void update_pointers() {} | |
446 virtual void update_pointers(HeapWord* beg_addr, HeapWord* end_addr) {} | |
447 #endif // SERIALGC | |
448 | |
449 // CI translation: ProfileData can represent both MethodDataOop data | |
450 // as well as CIMethodData data. This function is provided for translating | |
451 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
452 // most ProfileData don't require any translation, so we provide the null | |
453 // translation here, and the required translators are in the ci subclasses. | |
454 virtual void translate_from(ProfileData* data) {} | |
455 | |
456 virtual void print_data_on(outputStream* st) { | |
457 ShouldNotReachHere(); | |
458 } | |
459 | |
460 #ifndef PRODUCT | |
461 void print_shared(outputStream* st, const char* name); | |
462 void tab(outputStream* st); | |
463 #endif | |
464 }; | |
465 | |
466 // BitData | |
467 // | |
468 // A BitData holds a flag or two in its header. | |
469 class BitData : public ProfileData { | |
470 protected: | |
471 enum { | |
472 // null_seen: | |
473 // saw a null operand (cast/aastore/instanceof) | |
474 null_seen_flag = DataLayout::first_flag + 0 | |
475 }; | |
476 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
477 public: | |
478 BitData(DataLayout* layout) : ProfileData(layout) { | |
479 } | |
480 | |
481 virtual bool is_BitData() { return true; } | |
482 | |
483 static int static_cell_count() { | |
484 return bit_cell_count; | |
485 } | |
486 | |
487 virtual int cell_count() { | |
488 return static_cell_count(); | |
489 } | |
490 | |
491 // Accessor | |
492 | |
493 // The null_seen flag bit is specially known to the interpreter. | |
494 // Consulting it allows the compiler to avoid setting up null_check traps. | |
495 bool null_seen() { return flag_at(null_seen_flag); } | |
496 void set_null_seen() { set_flag_at(null_seen_flag); } | |
497 | |
498 | |
499 // Code generation support | |
500 static int null_seen_byte_constant() { | |
501 return flag_number_to_byte_constant(null_seen_flag); | |
502 } | |
503 | |
504 static ByteSize bit_data_size() { | |
505 return cell_offset(bit_cell_count); | |
506 } | |
507 | |
508 #ifndef PRODUCT | |
509 void print_data_on(outputStream* st); | |
510 #endif | |
511 }; | |
512 | |
513 // CounterData | |
514 // | |
515 // A CounterData corresponds to a simple counter. | |
516 class CounterData : public BitData { | |
517 protected: | |
518 enum { | |
519 count_off, | |
520 counter_cell_count | |
521 }; | |
522 public: | |
523 CounterData(DataLayout* layout) : BitData(layout) {} | |
524 | |
525 virtual bool is_CounterData() { return true; } | |
526 | |
527 static int static_cell_count() { | |
528 return counter_cell_count; | |
529 } | |
530 | |
531 virtual int cell_count() { | |
532 return static_cell_count(); | |
533 } | |
534 | |
535 // Direct accessor | |
536 uint count() { | |
537 return uint_at(count_off); | |
538 } | |
539 | |
540 // Code generation support | |
541 static ByteSize count_offset() { | |
542 return cell_offset(count_off); | |
543 } | |
544 static ByteSize counter_data_size() { | |
545 return cell_offset(counter_cell_count); | |
546 } | |
547 | |
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548 void set_count(uint count) { |
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549 set_uint_at(count_off, count); |
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550 } |
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551 |
0 | 552 #ifndef PRODUCT |
553 void print_data_on(outputStream* st); | |
554 #endif | |
555 }; | |
556 | |
557 // JumpData | |
558 // | |
559 // A JumpData is used to access profiling information for a direct | |
560 // branch. It is a counter, used for counting the number of branches, | |
561 // plus a data displacement, used for realigning the data pointer to | |
562 // the corresponding target bci. | |
563 class JumpData : public ProfileData { | |
564 protected: | |
565 enum { | |
566 taken_off_set, | |
567 displacement_off_set, | |
568 jump_cell_count | |
569 }; | |
570 | |
571 void set_displacement(int displacement) { | |
572 set_int_at(displacement_off_set, displacement); | |
573 } | |
574 | |
575 public: | |
576 JumpData(DataLayout* layout) : ProfileData(layout) { | |
577 assert(layout->tag() == DataLayout::jump_data_tag || | |
578 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
579 } | |
580 | |
581 virtual bool is_JumpData() { return true; } | |
582 | |
583 static int static_cell_count() { | |
584 return jump_cell_count; | |
585 } | |
586 | |
587 virtual int cell_count() { | |
588 return static_cell_count(); | |
589 } | |
590 | |
591 // Direct accessor | |
592 uint taken() { | |
593 return uint_at(taken_off_set); | |
594 } | |
595 // Saturating counter | |
596 uint inc_taken() { | |
597 uint cnt = taken() + 1; | |
598 // Did we wrap? Will compiler screw us?? | |
599 if (cnt == 0) cnt--; | |
600 set_uint_at(taken_off_set, cnt); | |
601 return cnt; | |
602 } | |
603 | |
604 int displacement() { | |
605 return int_at(displacement_off_set); | |
606 } | |
607 | |
608 // Code generation support | |
609 static ByteSize taken_offset() { | |
610 return cell_offset(taken_off_set); | |
611 } | |
612 | |
613 static ByteSize displacement_offset() { | |
614 return cell_offset(displacement_off_set); | |
615 } | |
616 | |
617 // Specific initialization. | |
618 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
619 | |
620 #ifndef PRODUCT | |
621 void print_data_on(outputStream* st); | |
622 #endif | |
623 }; | |
624 | |
625 // ReceiverTypeData | |
626 // | |
627 // A ReceiverTypeData is used to access profiling information about a | |
628 // dynamic type check. It consists of a counter which counts the total times | |
629 // that the check is reached, and a series of (klassOop, count) pairs | |
630 // which are used to store a type profile for the receiver of the check. | |
631 class ReceiverTypeData : public CounterData { | |
632 protected: | |
633 enum { | |
634 receiver0_offset = counter_cell_count, | |
635 count0_offset, | |
636 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
637 }; | |
638 | |
639 public: | |
640 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
641 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
642 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
643 } | |
644 | |
645 virtual bool is_ReceiverTypeData() { return true; } | |
646 | |
647 static int static_cell_count() { | |
648 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
649 } | |
650 | |
651 virtual int cell_count() { | |
652 return static_cell_count(); | |
653 } | |
654 | |
655 // Direct accessors | |
656 static uint row_limit() { | |
657 return TypeProfileWidth; | |
658 } | |
659 static int receiver_cell_index(uint row) { | |
660 return receiver0_offset + row * receiver_type_row_cell_count; | |
661 } | |
662 static int receiver_count_cell_index(uint row) { | |
663 return count0_offset + row * receiver_type_row_cell_count; | |
664 } | |
665 | |
666 // Get the receiver at row. The 'unchecked' version is needed by parallel old | |
667 // gc; it does not assert the receiver is a klass. During compaction of the | |
668 // perm gen, the klass may already have moved, so the is_klass() predicate | |
669 // would fail. The 'normal' version should be used whenever possible. | |
670 klassOop receiver_unchecked(uint row) { | |
671 assert(row < row_limit(), "oob"); | |
672 oop recv = oop_at(receiver_cell_index(row)); | |
673 return (klassOop)recv; | |
674 } | |
675 | |
676 klassOop receiver(uint row) { | |
677 klassOop recv = receiver_unchecked(row); | |
678 assert(recv == NULL || ((oop)recv)->is_klass(), "wrong type"); | |
679 return recv; | |
680 } | |
681 | |
941 | 682 void set_receiver(uint row, oop p) { |
683 assert((uint)row < row_limit(), "oob"); | |
684 set_oop_at(receiver_cell_index(row), p); | |
685 } | |
686 | |
0 | 687 uint receiver_count(uint row) { |
688 assert(row < row_limit(), "oob"); | |
689 return uint_at(receiver_count_cell_index(row)); | |
690 } | |
691 | |
941 | 692 void set_receiver_count(uint row, uint count) { |
693 assert(row < row_limit(), "oob"); | |
694 set_uint_at(receiver_count_cell_index(row), count); | |
695 } | |
696 | |
697 void clear_row(uint row) { | |
698 assert(row < row_limit(), "oob"); | |
1251
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699 // Clear total count - indicator of polymorphic call site. |
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700 // The site may look like as monomorphic after that but |
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701 // it allow to have more accurate profiling information because |
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702 // there was execution phase change since klasses were unloaded. |
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703 // If the site is still polymorphic then MDO will be updated |
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704 // to reflect it. But it could be the case that the site becomes |
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705 // only bimorphic. Then keeping total count not 0 will be wrong. |
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706 // Even if we use monomorphic (when it is not) for compilation |
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707 // we will only have trap, deoptimization and recompile again |
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708 // with updated MDO after executing method in Interpreter. |
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709 // An additional receiver will be recorded in the cleaned row |
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710 // during next call execution. |
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711 // |
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712 // Note: our profiling logic works with empty rows in any slot. |
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713 // We do sorting a profiling info (ciCallProfile) for compilation. |
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714 // |
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715 set_count(0); |
941 | 716 set_receiver(row, NULL); |
717 set_receiver_count(row, 0); | |
718 } | |
719 | |
0 | 720 // Code generation support |
721 static ByteSize receiver_offset(uint row) { | |
722 return cell_offset(receiver_cell_index(row)); | |
723 } | |
724 static ByteSize receiver_count_offset(uint row) { | |
725 return cell_offset(receiver_count_cell_index(row)); | |
726 } | |
727 static ByteSize receiver_type_data_size() { | |
728 return cell_offset(static_cell_count()); | |
729 } | |
730 | |
731 // GC support | |
732 virtual void follow_contents(); | |
733 virtual void oop_iterate(OopClosure* blk); | |
734 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr); | |
735 virtual void adjust_pointers(); | |
941 | 736 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure); |
0 | 737 |
738 #ifndef SERIALGC | |
739 // Parallel old support | |
740 virtual void follow_contents(ParCompactionManager* cm); | |
741 virtual void update_pointers(); | |
742 virtual void update_pointers(HeapWord* beg_addr, HeapWord* end_addr); | |
743 #endif // SERIALGC | |
744 | |
745 oop* adr_receiver(uint row) { | |
746 return adr_oop_at(receiver_cell_index(row)); | |
747 } | |
748 | |
749 #ifndef PRODUCT | |
750 void print_receiver_data_on(outputStream* st); | |
751 void print_data_on(outputStream* st); | |
752 #endif | |
753 }; | |
754 | |
755 // VirtualCallData | |
756 // | |
757 // A VirtualCallData is used to access profiling information about a | |
758 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
759 class VirtualCallData : public ReceiverTypeData { | |
760 public: | |
761 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
762 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
763 } | |
764 | |
765 virtual bool is_VirtualCallData() { return true; } | |
766 | |
767 static int static_cell_count() { | |
768 // At this point we could add more profile state, e.g., for arguments. | |
769 // But for now it's the same size as the base record type. | |
770 return ReceiverTypeData::static_cell_count(); | |
771 } | |
772 | |
773 virtual int cell_count() { | |
774 return static_cell_count(); | |
775 } | |
776 | |
777 // Direct accessors | |
778 static ByteSize virtual_call_data_size() { | |
779 return cell_offset(static_cell_count()); | |
780 } | |
781 | |
782 #ifndef PRODUCT | |
783 void print_data_on(outputStream* st); | |
784 #endif | |
785 }; | |
786 | |
787 // RetData | |
788 // | |
789 // A RetData is used to access profiling information for a ret bytecode. | |
790 // It is composed of a count of the number of times that the ret has | |
791 // been executed, followed by a series of triples of the form | |
792 // (bci, count, di) which count the number of times that some bci was the | |
793 // target of the ret and cache a corresponding data displacement. | |
794 class RetData : public CounterData { | |
795 protected: | |
796 enum { | |
797 bci0_offset = counter_cell_count, | |
798 count0_offset, | |
799 displacement0_offset, | |
800 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
801 }; | |
802 | |
803 void set_bci(uint row, int bci) { | |
804 assert((uint)row < row_limit(), "oob"); | |
805 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
806 } | |
807 void release_set_bci(uint row, int bci) { | |
808 assert((uint)row < row_limit(), "oob"); | |
809 // 'release' when setting the bci acts as a valid flag for other | |
810 // threads wrt bci_count and bci_displacement. | |
811 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
812 } | |
813 void set_bci_count(uint row, uint count) { | |
814 assert((uint)row < row_limit(), "oob"); | |
815 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
816 } | |
817 void set_bci_displacement(uint row, int disp) { | |
818 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
819 } | |
820 | |
821 public: | |
822 RetData(DataLayout* layout) : CounterData(layout) { | |
823 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
824 } | |
825 | |
826 virtual bool is_RetData() { return true; } | |
827 | |
828 enum { | |
829 no_bci = -1 // value of bci when bci1/2 are not in use. | |
830 }; | |
831 | |
832 static int static_cell_count() { | |
833 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
834 } | |
835 | |
836 virtual int cell_count() { | |
837 return static_cell_count(); | |
838 } | |
839 | |
840 static uint row_limit() { | |
841 return BciProfileWidth; | |
842 } | |
843 static int bci_cell_index(uint row) { | |
844 return bci0_offset + row * ret_row_cell_count; | |
845 } | |
846 static int bci_count_cell_index(uint row) { | |
847 return count0_offset + row * ret_row_cell_count; | |
848 } | |
849 static int bci_displacement_cell_index(uint row) { | |
850 return displacement0_offset + row * ret_row_cell_count; | |
851 } | |
852 | |
853 // Direct accessors | |
854 int bci(uint row) { | |
855 return int_at(bci_cell_index(row)); | |
856 } | |
857 uint bci_count(uint row) { | |
858 return uint_at(bci_count_cell_index(row)); | |
859 } | |
860 int bci_displacement(uint row) { | |
861 return int_at(bci_displacement_cell_index(row)); | |
862 } | |
863 | |
864 // Interpreter Runtime support | |
865 address fixup_ret(int return_bci, methodDataHandle mdo); | |
866 | |
867 // Code generation support | |
868 static ByteSize bci_offset(uint row) { | |
869 return cell_offset(bci_cell_index(row)); | |
870 } | |
871 static ByteSize bci_count_offset(uint row) { | |
872 return cell_offset(bci_count_cell_index(row)); | |
873 } | |
874 static ByteSize bci_displacement_offset(uint row) { | |
875 return cell_offset(bci_displacement_cell_index(row)); | |
876 } | |
877 | |
878 // Specific initialization. | |
879 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
880 | |
881 #ifndef PRODUCT | |
882 void print_data_on(outputStream* st); | |
883 #endif | |
884 }; | |
885 | |
886 // BranchData | |
887 // | |
888 // A BranchData is used to access profiling data for a two-way branch. | |
889 // It consists of taken and not_taken counts as well as a data displacement | |
890 // for the taken case. | |
891 class BranchData : public JumpData { | |
892 protected: | |
893 enum { | |
894 not_taken_off_set = jump_cell_count, | |
895 branch_cell_count | |
896 }; | |
897 | |
898 void set_displacement(int displacement) { | |
899 set_int_at(displacement_off_set, displacement); | |
900 } | |
901 | |
902 public: | |
903 BranchData(DataLayout* layout) : JumpData(layout) { | |
904 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
905 } | |
906 | |
907 virtual bool is_BranchData() { return true; } | |
908 | |
909 static int static_cell_count() { | |
910 return branch_cell_count; | |
911 } | |
912 | |
913 virtual int cell_count() { | |
914 return static_cell_count(); | |
915 } | |
916 | |
917 // Direct accessor | |
918 uint not_taken() { | |
919 return uint_at(not_taken_off_set); | |
920 } | |
921 | |
922 uint inc_not_taken() { | |
923 uint cnt = not_taken() + 1; | |
924 // Did we wrap? Will compiler screw us?? | |
925 if (cnt == 0) cnt--; | |
926 set_uint_at(not_taken_off_set, cnt); | |
927 return cnt; | |
928 } | |
929 | |
930 // Code generation support | |
931 static ByteSize not_taken_offset() { | |
932 return cell_offset(not_taken_off_set); | |
933 } | |
934 static ByteSize branch_data_size() { | |
935 return cell_offset(branch_cell_count); | |
936 } | |
937 | |
938 // Specific initialization. | |
939 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
940 | |
941 #ifndef PRODUCT | |
942 void print_data_on(outputStream* st); | |
943 #endif | |
944 }; | |
945 | |
946 // ArrayData | |
947 // | |
948 // A ArrayData is a base class for accessing profiling data which does | |
949 // not have a statically known size. It consists of an array length | |
950 // and an array start. | |
951 class ArrayData : public ProfileData { | |
952 protected: | |
953 friend class DataLayout; | |
954 | |
955 enum { | |
956 array_len_off_set, | |
957 array_start_off_set | |
958 }; | |
959 | |
960 uint array_uint_at(int index) { | |
961 int aindex = index + array_start_off_set; | |
962 return uint_at(aindex); | |
963 } | |
964 int array_int_at(int index) { | |
965 int aindex = index + array_start_off_set; | |
966 return int_at(aindex); | |
967 } | |
968 oop array_oop_at(int index) { | |
969 int aindex = index + array_start_off_set; | |
970 return oop_at(aindex); | |
971 } | |
972 void array_set_int_at(int index, int value) { | |
973 int aindex = index + array_start_off_set; | |
974 set_int_at(aindex, value); | |
975 } | |
976 | |
977 // Code generation support for subclasses. | |
978 static ByteSize array_element_offset(int index) { | |
979 return cell_offset(array_start_off_set + index); | |
980 } | |
981 | |
982 public: | |
983 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
984 | |
985 virtual bool is_ArrayData() { return true; } | |
986 | |
987 static int static_cell_count() { | |
988 return -1; | |
989 } | |
990 | |
991 int array_len() { | |
992 return int_at_unchecked(array_len_off_set); | |
993 } | |
994 | |
995 virtual int cell_count() { | |
996 return array_len() + 1; | |
997 } | |
998 | |
999 // Code generation support | |
1000 static ByteSize array_len_offset() { | |
1001 return cell_offset(array_len_off_set); | |
1002 } | |
1003 static ByteSize array_start_offset() { | |
1004 return cell_offset(array_start_off_set); | |
1005 } | |
1006 }; | |
1007 | |
1008 // MultiBranchData | |
1009 // | |
1010 // A MultiBranchData is used to access profiling information for | |
1011 // a multi-way branch (*switch bytecodes). It consists of a series | |
1012 // of (count, displacement) pairs, which count the number of times each | |
1013 // case was taken and specify the data displacment for each branch target. | |
1014 class MultiBranchData : public ArrayData { | |
1015 protected: | |
1016 enum { | |
1017 default_count_off_set, | |
1018 default_disaplacement_off_set, | |
1019 case_array_start | |
1020 }; | |
1021 enum { | |
1022 relative_count_off_set, | |
1023 relative_displacement_off_set, | |
1024 per_case_cell_count | |
1025 }; | |
1026 | |
1027 void set_default_displacement(int displacement) { | |
1028 array_set_int_at(default_disaplacement_off_set, displacement); | |
1029 } | |
1030 void set_displacement_at(int index, int displacement) { | |
1031 array_set_int_at(case_array_start + | |
1032 index * per_case_cell_count + | |
1033 relative_displacement_off_set, | |
1034 displacement); | |
1035 } | |
1036 | |
1037 public: | |
1038 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1039 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1040 } | |
1041 | |
1042 virtual bool is_MultiBranchData() { return true; } | |
1043 | |
1044 static int compute_cell_count(BytecodeStream* stream); | |
1045 | |
1046 int number_of_cases() { | |
1047 int alen = array_len() - 2; // get rid of default case here. | |
1048 assert(alen % per_case_cell_count == 0, "must be even"); | |
1049 return (alen / per_case_cell_count); | |
1050 } | |
1051 | |
1052 uint default_count() { | |
1053 return array_uint_at(default_count_off_set); | |
1054 } | |
1055 int default_displacement() { | |
1056 return array_int_at(default_disaplacement_off_set); | |
1057 } | |
1058 | |
1059 uint count_at(int index) { | |
1060 return array_uint_at(case_array_start + | |
1061 index * per_case_cell_count + | |
1062 relative_count_off_set); | |
1063 } | |
1064 int displacement_at(int index) { | |
1065 return array_int_at(case_array_start + | |
1066 index * per_case_cell_count + | |
1067 relative_displacement_off_set); | |
1068 } | |
1069 | |
1070 // Code generation support | |
1071 static ByteSize default_count_offset() { | |
1072 return array_element_offset(default_count_off_set); | |
1073 } | |
1074 static ByteSize default_displacement_offset() { | |
1075 return array_element_offset(default_disaplacement_off_set); | |
1076 } | |
1077 static ByteSize case_count_offset(int index) { | |
1078 return case_array_offset() + | |
1079 (per_case_size() * index) + | |
1080 relative_count_offset(); | |
1081 } | |
1082 static ByteSize case_array_offset() { | |
1083 return array_element_offset(case_array_start); | |
1084 } | |
1085 static ByteSize per_case_size() { | |
1086 return in_ByteSize(per_case_cell_count) * cell_size; | |
1087 } | |
1088 static ByteSize relative_count_offset() { | |
1089 return in_ByteSize(relative_count_off_set) * cell_size; | |
1090 } | |
1091 static ByteSize relative_displacement_offset() { | |
1092 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1093 } | |
1094 | |
1095 // Specific initialization. | |
1096 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
1097 | |
1098 #ifndef PRODUCT | |
1099 void print_data_on(outputStream* st); | |
1100 #endif | |
1101 }; | |
1102 | |
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1103 class ArgInfoData : public ArrayData { |
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1104 |
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1105 public: |
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1106 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1107 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1108 } |
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1109 |
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1110 virtual bool is_ArgInfoData() { return true; } |
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1111 |
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1112 |
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1113 int number_of_args() { |
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1114 return array_len(); |
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1115 } |
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1116 |
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1117 uint arg_modified(int arg) { |
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1118 return array_uint_at(arg); |
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1119 } |
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1120 |
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1121 void set_arg_modified(int arg, uint val) { |
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1122 array_set_int_at(arg, val); |
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1123 } |
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1124 |
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1125 #ifndef PRODUCT |
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1126 void print_data_on(outputStream* st); |
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1127 #endif |
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1128 }; |
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1129 |
0 | 1130 // methodDataOop |
1131 // | |
1132 // A methodDataOop holds information which has been collected about | |
1133 // a method. Its layout looks like this: | |
1134 // | |
1135 // ----------------------------- | |
1136 // | header | | |
1137 // | klass | | |
1138 // ----------------------------- | |
1139 // | method | | |
1140 // | size of the methodDataOop | | |
1141 // ----------------------------- | |
1142 // | Data entries... | | |
1143 // | (variable size) | | |
1144 // | | | |
1145 // . . | |
1146 // . . | |
1147 // . . | |
1148 // | | | |
1149 // ----------------------------- | |
1150 // | |
1151 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1152 // DataLayout in the array corresponds to a specific bytecode in the | |
1153 // method. The entries in the array are sorted by the corresponding | |
1154 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1155 // which point to the underlying blocks of DataLayout structures. | |
1156 // | |
1157 // During interpretation, if profiling in enabled, the interpreter | |
1158 // maintains a method data pointer (mdp), which points at the entry | |
1159 // in the array corresponding to the current bci. In the course of | |
1160 // intepretation, when a bytecode is encountered that has profile data | |
1161 // associated with it, the entry pointed to by mdp is updated, then the | |
1162 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1163 // is NULL to begin with, the interpreter assumes that the current method | |
1164 // is not (yet) being profiled. | |
1165 // | |
1166 // In methodDataOop parlance, "dp" is a "data pointer", the actual address | |
1167 // of a DataLayout element. A "di" is a "data index", the offset in bytes | |
1168 // from the base of the data entry array. A "displacement" is the byte offset | |
1169 // in certain ProfileData objects that indicate the amount the mdp must be | |
1170 // adjusted in the event of a change in control flow. | |
1171 // | |
1172 | |
1173 class methodDataOopDesc : public oopDesc { | |
1174 friend class VMStructs; | |
1175 private: | |
1176 friend class ProfileData; | |
1177 | |
1178 // Back pointer to the methodOop | |
1179 methodOop _method; | |
1180 | |
1181 // Size of this oop in bytes | |
1182 int _size; | |
1183 | |
1184 // Cached hint for bci_to_dp and bci_to_data | |
1185 int _hint_di; | |
1186 | |
1187 // Whole-method sticky bits and flags | |
1188 public: | |
1189 enum { | |
1190 _trap_hist_limit = 16, // decoupled from Deoptimization::Reason_LIMIT | |
1191 _trap_hist_mask = max_jubyte, | |
1192 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1193 }; // Public flag values | |
1194 private: | |
1195 uint _nof_decompiles; // count of all nmethod removals | |
1196 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1197 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1198 union { | |
1199 intptr_t _align; | |
1200 u1 _array[_trap_hist_limit]; | |
1201 } _trap_hist; | |
1202 | |
1203 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1204 intx _eflags; // flags on escape information | |
1205 intx _arg_local; // bit set of non-escaping arguments | |
1206 intx _arg_stack; // bit set of stack-allocatable arguments | |
1207 intx _arg_returned; // bit set of returned arguments | |
1208 | |
1209 int _creation_mileage; // method mileage at MDO creation | |
1210 | |
1211 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1212 int _data_size; | |
1213 | |
1214 // Beginning of the data entries | |
1215 intptr_t _data[1]; | |
1216 | |
1217 // Helper for size computation | |
1218 static int compute_data_size(BytecodeStream* stream); | |
1219 static int bytecode_cell_count(Bytecodes::Code code); | |
1220 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1221 | |
1222 // Helper for initialization | |
1223 DataLayout* data_layout_at(int data_index) { | |
1224 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); | |
1225 return (DataLayout*) (((address)_data) + data_index); | |
1226 } | |
1227 | |
1228 // Initialize an individual data segment. Returns the size of | |
1229 // the segment in bytes. | |
1230 int initialize_data(BytecodeStream* stream, int data_index); | |
1231 | |
1232 // Helper for data_at | |
1233 DataLayout* limit_data_position() { | |
1234 return (DataLayout*)((address)data_base() + _data_size); | |
1235 } | |
1236 bool out_of_bounds(int data_index) { | |
1237 return data_index >= data_size(); | |
1238 } | |
1239 | |
1240 // Give each of the data entries a chance to perform specific | |
1241 // data initialization. | |
1242 void post_initialize(BytecodeStream* stream); | |
1243 | |
1244 // hint accessors | |
1245 int hint_di() const { return _hint_di; } | |
1246 void set_hint_di(int di) { | |
1247 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1248 _hint_di = di; | |
1249 } | |
1250 ProfileData* data_before(int bci) { | |
1251 // avoid SEGV on this edge case | |
1252 if (data_size() == 0) | |
1253 return NULL; | |
1254 int hint = hint_di(); | |
1255 if (data_layout_at(hint)->bci() <= bci) | |
1256 return data_at(hint); | |
1257 return first_data(); | |
1258 } | |
1259 | |
1260 // What is the index of the first data entry? | |
1261 int first_di() { return 0; } | |
1262 | |
1263 // Find or create an extra ProfileData: | |
1264 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1265 | |
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1266 // return the argument info cell |
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1267 ArgInfoData *arg_info(); |
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1268 |
0 | 1269 public: |
1270 static int header_size() { | |
1271 return sizeof(methodDataOopDesc)/wordSize; | |
1272 } | |
1273 | |
1274 // Compute the size of a methodDataOop before it is created. | |
1275 static int compute_allocation_size_in_bytes(methodHandle method); | |
1276 static int compute_allocation_size_in_words(methodHandle method); | |
1277 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1278 | |
1279 // Determine if a given bytecode can have profile information. | |
1280 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1281 return bytecode_cell_count(code) != no_profile_data; | |
1282 } | |
1283 | |
1284 // Perform initialization of a new methodDataOop | |
1285 void initialize(methodHandle method); | |
1286 | |
1287 // My size | |
1288 int object_size_in_bytes() { return _size; } | |
1289 int object_size() { | |
1290 return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); | |
1291 } | |
1292 | |
1293 int creation_mileage() const { return _creation_mileage; } | |
1294 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1295 bool is_mature() const; // consult mileage and ProfileMaturityPercentage | |
1296 static int mileage_of(methodOop m); | |
1297 | |
1298 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1299 enum EscapeFlag { | |
1300 estimated = 1 << 0, | |
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1301 return_local = 1 << 1, |
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1302 return_allocated = 1 << 2, |
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1303 allocated_escapes = 1 << 3, |
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1304 unknown_modified = 1 << 4 |
0 | 1305 }; |
1306 | |
1307 intx eflags() { return _eflags; } | |
1308 intx arg_local() { return _arg_local; } | |
1309 intx arg_stack() { return _arg_stack; } | |
1310 intx arg_returned() { return _arg_returned; } | |
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1311 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1312 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1313 return aid->arg_modified(a); } |
0 | 1314 |
1315 void set_eflags(intx v) { _eflags = v; } | |
1316 void set_arg_local(intx v) { _arg_local = v; } | |
1317 void set_arg_stack(intx v) { _arg_stack = v; } | |
1318 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1319 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1320 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1321 |
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1322 aid->set_arg_modified(a, v); } |
0 | 1323 |
1324 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1325 | |
1326 // Location and size of data area | |
1327 address data_base() const { | |
1328 return (address) _data; | |
1329 } | |
1330 int data_size() { | |
1331 return _data_size; | |
1332 } | |
1333 | |
1334 // Accessors | |
1335 methodOop method() { return _method; } | |
1336 | |
1337 // Get the data at an arbitrary (sort of) data index. | |
1338 ProfileData* data_at(int data_index); | |
1339 | |
1340 // Walk through the data in order. | |
1341 ProfileData* first_data() { return data_at(first_di()); } | |
1342 ProfileData* next_data(ProfileData* current); | |
1343 bool is_valid(ProfileData* current) { return current != NULL; } | |
1344 | |
1345 // Convert a dp (data pointer) to a di (data index). | |
1346 int dp_to_di(address dp) { | |
1347 return dp - ((address)_data); | |
1348 } | |
1349 | |
1350 address di_to_dp(int di) { | |
1351 return (address)data_layout_at(di); | |
1352 } | |
1353 | |
1354 // bci to di/dp conversion. | |
1355 address bci_to_dp(int bci); | |
1356 int bci_to_di(int bci) { | |
1357 return dp_to_di(bci_to_dp(bci)); | |
1358 } | |
1359 | |
1360 // Get the data at an arbitrary bci, or NULL if there is none. | |
1361 ProfileData* bci_to_data(int bci); | |
1362 | |
1363 // Same, but try to create an extra_data record if one is needed: | |
1364 ProfileData* allocate_bci_to_data(int bci) { | |
1365 ProfileData* data = bci_to_data(bci); | |
1366 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1367 } | |
1368 | |
1369 // Add a handful of extra data records, for trap tracking. | |
1370 DataLayout* extra_data_base() { return limit_data_position(); } | |
1371 DataLayout* extra_data_limit() { return (DataLayout*)((address)this + object_size_in_bytes()); } | |
1372 int extra_data_size() { return (address)extra_data_limit() | |
1373 - (address)extra_data_base(); } | |
1374 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1375 | |
1376 // Return (uint)-1 for overflow. | |
1377 uint trap_count(int reason) const { | |
1378 assert((uint)reason < _trap_hist_limit, "oob"); | |
1379 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1380 } | |
1381 // For loops: | |
1382 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1383 static uint trap_count_limit() { return _trap_hist_mask; } | |
1384 uint inc_trap_count(int reason) { | |
1385 // Count another trap, anywhere in this method. | |
1386 assert(reason >= 0, "must be single trap"); | |
1387 if ((uint)reason < _trap_hist_limit) { | |
1388 uint cnt1 = 1 + _trap_hist._array[reason]; | |
1389 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
1390 _trap_hist._array[reason] = cnt1; | |
1391 return cnt1; | |
1392 } else { | |
1393 return _trap_hist_mask + (++_nof_overflow_traps); | |
1394 } | |
1395 } else { | |
1396 // Could not represent the count in the histogram. | |
1397 return (++_nof_overflow_traps); | |
1398 } | |
1399 } | |
1400 | |
1401 uint overflow_trap_count() const { | |
1402 return _nof_overflow_traps; | |
1403 } | |
1404 uint overflow_recompile_count() const { | |
1405 return _nof_overflow_recompiles; | |
1406 } | |
1407 void inc_overflow_recompile_count() { | |
1408 _nof_overflow_recompiles += 1; | |
1409 } | |
1410 uint decompile_count() const { | |
1411 return _nof_decompiles; | |
1412 } | |
1413 void inc_decompile_count() { | |
1414 _nof_decompiles += 1; | |
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1415 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
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1416 method()->set_not_compilable(); |
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1417 } |
0 | 1418 } |
1419 | |
1420 // Support for code generation | |
1421 static ByteSize data_offset() { | |
1422 return byte_offset_of(methodDataOopDesc, _data[0]); | |
1423 } | |
1424 | |
1425 // GC support | |
1426 oop* adr_method() const { return (oop*)&_method; } | |
1427 bool object_is_parsable() const { return _size != 0; } | |
1428 void set_object_is_parsable(int object_size_in_bytes) { _size = object_size_in_bytes; } | |
1429 | |
1430 #ifndef PRODUCT | |
1431 // printing support for method data | |
1432 void print_data_on(outputStream* st); | |
1433 #endif | |
1434 | |
1435 // verification | |
1436 void verify_data_on(outputStream* st); | |
1437 }; |