Mercurial > hg > truffle
annotate src/share/vm/oops/methodDataOop.hpp @ 2904:1916da1d3e11
Merge.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 08 Jun 2011 17:26:49 +0200 |
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0 | 1 /* |
2227 | 2 * Copyright (c) 2000, 2011, 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_OOPS_METHODDATAOOP_HPP |
26 #define SHARE_VM_OOPS_METHODDATAOOP_HPP | |
27 | |
28 #include "interpreter/bytecodes.hpp" | |
29 #include "memory/universe.hpp" | |
30 #include "oops/methodOop.hpp" | |
31 #include "oops/oop.hpp" | |
32 #include "runtime/orderAccess.hpp" | |
33 | |
0 | 34 class BytecodeStream; |
35 | |
36 // The MethodData object collects counts and other profile information | |
37 // during zeroth-tier (interpretive) and first-tier execution. | |
38 // The profile is used later by compilation heuristics. Some heuristics | |
39 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
40 // optimization often has a down-side, a corner case that it handles | |
41 // poorly, but which is thought to be rare. The profile provides | |
42 // evidence of this rarity for a given method or even BCI. It allows | |
43 // the compiler to back out of the optimization at places where it | |
44 // has historically been a poor choice. Other heuristics try to use | |
45 // specific information gathered about types observed at a given site. | |
46 // | |
47 // All data in the profile is approximate. It is expected to be accurate | |
48 // on the whole, but the system expects occasional inaccuraces, due to | |
49 // counter overflow, multiprocessor races during data collection, space | |
50 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
51 // optimization quality but will not affect correctness. Also, each MDO | |
52 // is marked with its birth-date ("creation_mileage") which can be used | |
53 // to assess the quality ("maturity") of its data. | |
54 // | |
55 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
56 // state. Also, certain recorded per-BCI events are given one-bit counters | |
57 // which overflow to a saturated state which applied to all counters at | |
58 // that BCI. In other words, there is a small lattice which approximates | |
59 // the ideal of an infinite-precision counter for each event at each BCI, | |
60 // and the lattice quickly "bottoms out" in a state where all counters | |
61 // are taken to be indefinitely large. | |
62 // | |
63 // The reader will find many data races in profile gathering code, starting | |
64 // with invocation counter incrementation. None of these races harm correct | |
65 // execution of the compiled code. | |
66 | |
941 | 67 // forward decl |
68 class ProfileData; | |
69 | |
0 | 70 // DataLayout |
71 // | |
72 // Overlay for generic profiling data. | |
73 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
74 private: | |
75 // Every data layout begins with a header. This header | |
76 // contains a tag, which is used to indicate the size/layout | |
77 // of the data, 4 bits of flags, which can be used in any way, | |
78 // 4 bits of trap history (none/one reason/many reasons), | |
79 // and a bci, which is used to tie this piece of data to a | |
80 // specific bci in the bytecodes. | |
81 union { | |
82 intptr_t _bits; | |
83 struct { | |
84 u1 _tag; | |
85 u1 _flags; | |
86 u2 _bci; | |
87 } _struct; | |
88 } _header; | |
89 | |
90 // The data layout has an arbitrary number of cells, each sized | |
91 // to accomodate a pointer or an integer. | |
92 intptr_t _cells[1]; | |
93 | |
94 // Some types of data layouts need a length field. | |
95 static bool needs_array_len(u1 tag); | |
96 | |
97 public: | |
98 enum { | |
99 counter_increment = 1 | |
100 }; | |
101 | |
102 enum { | |
103 cell_size = sizeof(intptr_t) | |
104 }; | |
105 | |
106 // Tag values | |
107 enum { | |
108 no_tag, | |
109 bit_data_tag, | |
110 counter_data_tag, | |
111 jump_data_tag, | |
112 receiver_type_data_tag, | |
113 virtual_call_data_tag, | |
114 ret_data_tag, | |
115 branch_data_tag, | |
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116 multi_branch_data_tag, |
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117 arg_info_data_tag |
0 | 118 }; |
119 | |
120 enum { | |
121 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
122 // The trap state breaks down further as [recompile:1 | reason:3]. | |
123 // This further breakdown is defined in deoptimization.cpp. | |
124 // See Deoptimization::trap_state_reason for an assert that | |
125 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
126 // | |
127 // The trap_state is collected only if ProfileTraps is true. | |
128 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
129 trap_shift = BitsPerByte - trap_bits, | |
130 trap_mask = right_n_bits(trap_bits), | |
131 trap_mask_in_place = (trap_mask << trap_shift), | |
132 flag_limit = trap_shift, | |
133 flag_mask = right_n_bits(flag_limit), | |
134 first_flag = 0 | |
135 }; | |
136 | |
137 // Size computation | |
138 static int header_size_in_bytes() { | |
139 return cell_size; | |
140 } | |
141 static int header_size_in_cells() { | |
142 return 1; | |
143 } | |
144 | |
145 static int compute_size_in_bytes(int cell_count) { | |
146 return header_size_in_bytes() + cell_count * cell_size; | |
147 } | |
148 | |
149 // Initialization | |
150 void initialize(u1 tag, u2 bci, int cell_count); | |
151 | |
152 // Accessors | |
153 u1 tag() { | |
154 return _header._struct._tag; | |
155 } | |
156 | |
157 // Return a few bits of trap state. Range is [0..trap_mask]. | |
158 // The state tells if traps with zero, one, or many reasons have occurred. | |
159 // It also tells whether zero or many recompilations have occurred. | |
160 // The associated trap histogram in the MDO itself tells whether | |
161 // traps are common or not. If a BCI shows that a trap X has | |
162 // occurred, and the MDO shows N occurrences of X, we make the | |
163 // simplifying assumption that all N occurrences can be blamed | |
164 // on that BCI. | |
165 int trap_state() { | |
166 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
167 } | |
168 | |
169 void set_trap_state(int new_state) { | |
170 assert(ProfileTraps, "used only under +ProfileTraps"); | |
171 uint old_flags = (_header._struct._flags & flag_mask); | |
172 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
173 } | |
174 | |
175 u1 flags() { | |
176 return _header._struct._flags; | |
177 } | |
178 | |
179 u2 bci() { | |
180 return _header._struct._bci; | |
181 } | |
182 | |
183 void set_header(intptr_t value) { | |
184 _header._bits = value; | |
185 } | |
186 void release_set_header(intptr_t value) { | |
187 OrderAccess::release_store_ptr(&_header._bits, value); | |
188 } | |
189 intptr_t header() { | |
190 return _header._bits; | |
191 } | |
192 void set_cell_at(int index, intptr_t value) { | |
193 _cells[index] = value; | |
194 } | |
195 void release_set_cell_at(int index, intptr_t value) { | |
196 OrderAccess::release_store_ptr(&_cells[index], value); | |
197 } | |
198 intptr_t cell_at(int index) { | |
199 return _cells[index]; | |
200 } | |
201 intptr_t* adr_cell_at(int index) { | |
202 return &_cells[index]; | |
203 } | |
204 oop* adr_oop_at(int index) { | |
205 return (oop*)&(_cells[index]); | |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
212 bool flag_at(int flag_number) { | |
213 assert(flag_number < flag_limit, "oob"); | |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
233 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
234 static int flag_number_to_byte_constant(int flag_number) { | |
235 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
236 DataLayout temp; temp.set_header(0); | |
237 temp.set_flag_at(flag_number); | |
238 return temp._header._struct._flags; | |
239 } | |
240 // Return a value which, when or-ed as a word into _header, sets the flag. | |
241 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
242 DataLayout temp; temp.set_header(0); | |
243 temp._header._struct._flags = byte_constant; | |
244 return temp._header._bits; | |
245 } | |
941 | 246 |
247 // GC support | |
248 ProfileData* data_in(); | |
249 void follow_weak_refs(BoolObjectClosure* cl); | |
0 | 250 }; |
251 | |
252 | |
253 // ProfileData class hierarchy | |
254 class ProfileData; | |
255 class BitData; | |
256 class CounterData; | |
257 class ReceiverTypeData; | |
258 class VirtualCallData; | |
259 class RetData; | |
260 class JumpData; | |
261 class BranchData; | |
262 class ArrayData; | |
263 class MultiBranchData; | |
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264 class ArgInfoData; |
0 | 265 |
266 | |
267 // ProfileData | |
268 // | |
269 // A ProfileData object is created to refer to a section of profiling | |
270 // data in a structured way. | |
271 class ProfileData : public ResourceObj { | |
272 private: | |
273 #ifndef PRODUCT | |
274 enum { | |
275 tab_width_one = 16, | |
276 tab_width_two = 36 | |
277 }; | |
278 #endif // !PRODUCT | |
279 | |
280 // This is a pointer to a section of profiling data. | |
281 DataLayout* _data; | |
282 | |
283 protected: | |
284 DataLayout* data() { return _data; } | |
285 | |
286 enum { | |
287 cell_size = DataLayout::cell_size | |
288 }; | |
289 | |
290 public: | |
291 // How many cells are in this? | |
292 virtual int cell_count() { | |
293 ShouldNotReachHere(); | |
294 return -1; | |
295 } | |
296 | |
297 // Return the size of this data. | |
298 int size_in_bytes() { | |
299 return DataLayout::compute_size_in_bytes(cell_count()); | |
300 } | |
301 | |
302 protected: | |
303 // Low-level accessors for underlying data | |
304 void set_intptr_at(int index, intptr_t value) { | |
305 assert(0 <= index && index < cell_count(), "oob"); | |
306 data()->set_cell_at(index, value); | |
307 } | |
308 void release_set_intptr_at(int index, intptr_t value) { | |
309 assert(0 <= index && index < cell_count(), "oob"); | |
310 data()->release_set_cell_at(index, value); | |
311 } | |
312 intptr_t intptr_at(int index) { | |
313 assert(0 <= index && index < cell_count(), "oob"); | |
314 return data()->cell_at(index); | |
315 } | |
316 void set_uint_at(int index, uint value) { | |
317 set_intptr_at(index, (intptr_t) value); | |
318 } | |
319 void release_set_uint_at(int index, uint value) { | |
320 release_set_intptr_at(index, (intptr_t) value); | |
321 } | |
322 uint uint_at(int index) { | |
323 return (uint)intptr_at(index); | |
324 } | |
325 void set_int_at(int index, int value) { | |
326 set_intptr_at(index, (intptr_t) value); | |
327 } | |
328 void release_set_int_at(int index, int value) { | |
329 release_set_intptr_at(index, (intptr_t) value); | |
330 } | |
331 int int_at(int index) { | |
332 return (int)intptr_at(index); | |
333 } | |
334 int int_at_unchecked(int index) { | |
335 return (int)data()->cell_at(index); | |
336 } | |
337 void set_oop_at(int index, oop value) { | |
338 set_intptr_at(index, (intptr_t) value); | |
339 } | |
340 oop oop_at(int index) { | |
341 return (oop)intptr_at(index); | |
342 } | |
343 oop* adr_oop_at(int index) { | |
344 assert(0 <= index && index < cell_count(), "oob"); | |
345 return data()->adr_oop_at(index); | |
346 } | |
347 | |
348 void set_flag_at(int flag_number) { | |
349 data()->set_flag_at(flag_number); | |
350 } | |
351 bool flag_at(int flag_number) { | |
352 return data()->flag_at(flag_number); | |
353 } | |
354 | |
355 // two convenient imports for use by subclasses: | |
356 static ByteSize cell_offset(int index) { | |
357 return DataLayout::cell_offset(index); | |
358 } | |
359 static int flag_number_to_byte_constant(int flag_number) { | |
360 return DataLayout::flag_number_to_byte_constant(flag_number); | |
361 } | |
362 | |
363 ProfileData(DataLayout* data) { | |
364 _data = data; | |
365 } | |
366 | |
367 public: | |
368 // Constructor for invalid ProfileData. | |
369 ProfileData(); | |
370 | |
371 u2 bci() { | |
372 return data()->bci(); | |
373 } | |
374 | |
375 address dp() { | |
376 return (address)_data; | |
377 } | |
378 | |
379 int trap_state() { | |
380 return data()->trap_state(); | |
381 } | |
382 void set_trap_state(int new_state) { | |
383 data()->set_trap_state(new_state); | |
384 } | |
385 | |
386 // Type checking | |
387 virtual bool is_BitData() { return false; } | |
388 virtual bool is_CounterData() { return false; } | |
389 virtual bool is_JumpData() { return false; } | |
390 virtual bool is_ReceiverTypeData(){ return false; } | |
391 virtual bool is_VirtualCallData() { return false; } | |
392 virtual bool is_RetData() { return false; } | |
393 virtual bool is_BranchData() { return false; } | |
394 virtual bool is_ArrayData() { return false; } | |
395 virtual bool is_MultiBranchData() { return false; } | |
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396 virtual bool is_ArgInfoData() { return false; } |
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397 |
0 | 398 |
399 BitData* as_BitData() { | |
400 assert(is_BitData(), "wrong type"); | |
401 return is_BitData() ? (BitData*) this : NULL; | |
402 } | |
403 CounterData* as_CounterData() { | |
404 assert(is_CounterData(), "wrong type"); | |
405 return is_CounterData() ? (CounterData*) this : NULL; | |
406 } | |
407 JumpData* as_JumpData() { | |
408 assert(is_JumpData(), "wrong type"); | |
409 return is_JumpData() ? (JumpData*) this : NULL; | |
410 } | |
411 ReceiverTypeData* as_ReceiverTypeData() { | |
412 assert(is_ReceiverTypeData(), "wrong type"); | |
413 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
414 } | |
415 VirtualCallData* as_VirtualCallData() { | |
416 assert(is_VirtualCallData(), "wrong type"); | |
417 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
418 } | |
419 RetData* as_RetData() { | |
420 assert(is_RetData(), "wrong type"); | |
421 return is_RetData() ? (RetData*) this : NULL; | |
422 } | |
423 BranchData* as_BranchData() { | |
424 assert(is_BranchData(), "wrong type"); | |
425 return is_BranchData() ? (BranchData*) this : NULL; | |
426 } | |
427 ArrayData* as_ArrayData() { | |
428 assert(is_ArrayData(), "wrong type"); | |
429 return is_ArrayData() ? (ArrayData*) this : NULL; | |
430 } | |
431 MultiBranchData* as_MultiBranchData() { | |
432 assert(is_MultiBranchData(), "wrong type"); | |
433 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
434 } | |
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435 ArgInfoData* as_ArgInfoData() { |
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436 assert(is_ArgInfoData(), "wrong type"); |
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437 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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438 } |
0 | 439 |
440 | |
441 // Subclass specific initialization | |
442 virtual void post_initialize(BytecodeStream* stream, methodDataOop mdo) {} | |
443 | |
444 // GC support | |
445 virtual void follow_contents() {} | |
446 virtual void oop_iterate(OopClosure* blk) {} | |
447 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr) {} | |
448 virtual void adjust_pointers() {} | |
941 | 449 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure) {} |
0 | 450 |
451 #ifndef SERIALGC | |
452 // Parallel old support | |
453 virtual void follow_contents(ParCompactionManager* cm) {} | |
454 virtual void update_pointers() {} | |
455 #endif // SERIALGC | |
456 | |
457 // CI translation: ProfileData can represent both MethodDataOop data | |
458 // as well as CIMethodData data. This function is provided for translating | |
459 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
460 // most ProfileData don't require any translation, so we provide the null | |
461 // translation here, and the required translators are in the ci subclasses. | |
462 virtual void translate_from(ProfileData* data) {} | |
463 | |
464 virtual void print_data_on(outputStream* st) { | |
465 ShouldNotReachHere(); | |
466 } | |
467 | |
468 #ifndef PRODUCT | |
469 void print_shared(outputStream* st, const char* name); | |
470 void tab(outputStream* st); | |
471 #endif | |
472 }; | |
473 | |
474 // BitData | |
475 // | |
476 // A BitData holds a flag or two in its header. | |
477 class BitData : public ProfileData { | |
478 protected: | |
479 enum { | |
480 // null_seen: | |
481 // saw a null operand (cast/aastore/instanceof) | |
482 null_seen_flag = DataLayout::first_flag + 0 | |
483 }; | |
484 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
485 public: | |
486 BitData(DataLayout* layout) : ProfileData(layout) { | |
487 } | |
488 | |
489 virtual bool is_BitData() { return true; } | |
490 | |
491 static int static_cell_count() { | |
492 return bit_cell_count; | |
493 } | |
494 | |
495 virtual int cell_count() { | |
496 return static_cell_count(); | |
497 } | |
498 | |
499 // Accessor | |
500 | |
501 // The null_seen flag bit is specially known to the interpreter. | |
502 // Consulting it allows the compiler to avoid setting up null_check traps. | |
503 bool null_seen() { return flag_at(null_seen_flag); } | |
504 void set_null_seen() { set_flag_at(null_seen_flag); } | |
505 | |
506 | |
507 // Code generation support | |
508 static int null_seen_byte_constant() { | |
509 return flag_number_to_byte_constant(null_seen_flag); | |
510 } | |
511 | |
512 static ByteSize bit_data_size() { | |
513 return cell_offset(bit_cell_count); | |
514 } | |
515 | |
516 #ifndef PRODUCT | |
517 void print_data_on(outputStream* st); | |
518 #endif | |
519 }; | |
520 | |
521 // CounterData | |
522 // | |
523 // A CounterData corresponds to a simple counter. | |
524 class CounterData : public BitData { | |
525 protected: | |
526 enum { | |
527 count_off, | |
528 counter_cell_count | |
529 }; | |
530 public: | |
531 CounterData(DataLayout* layout) : BitData(layout) {} | |
532 | |
533 virtual bool is_CounterData() { return true; } | |
534 | |
535 static int static_cell_count() { | |
536 return counter_cell_count; | |
537 } | |
538 | |
539 virtual int cell_count() { | |
540 return static_cell_count(); | |
541 } | |
542 | |
543 // Direct accessor | |
544 uint count() { | |
545 return uint_at(count_off); | |
546 } | |
547 | |
548 // Code generation support | |
549 static ByteSize count_offset() { | |
550 return cell_offset(count_off); | |
551 } | |
552 static ByteSize counter_data_size() { | |
553 return cell_offset(counter_cell_count); | |
554 } | |
555 | |
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556 void set_count(uint count) { |
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557 set_uint_at(count_off, count); |
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558 } |
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559 |
0 | 560 #ifndef PRODUCT |
561 void print_data_on(outputStream* st); | |
562 #endif | |
563 }; | |
564 | |
565 // JumpData | |
566 // | |
567 // A JumpData is used to access profiling information for a direct | |
568 // branch. It is a counter, used for counting the number of branches, | |
569 // plus a data displacement, used for realigning the data pointer to | |
570 // the corresponding target bci. | |
571 class JumpData : public ProfileData { | |
572 protected: | |
573 enum { | |
574 taken_off_set, | |
575 displacement_off_set, | |
576 jump_cell_count | |
577 }; | |
578 | |
579 void set_displacement(int displacement) { | |
580 set_int_at(displacement_off_set, displacement); | |
581 } | |
582 | |
583 public: | |
584 JumpData(DataLayout* layout) : ProfileData(layout) { | |
585 assert(layout->tag() == DataLayout::jump_data_tag || | |
586 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
587 } | |
588 | |
589 virtual bool is_JumpData() { return true; } | |
590 | |
591 static int static_cell_count() { | |
592 return jump_cell_count; | |
593 } | |
594 | |
595 virtual int cell_count() { | |
596 return static_cell_count(); | |
597 } | |
598 | |
599 // Direct accessor | |
600 uint taken() { | |
601 return uint_at(taken_off_set); | |
602 } | |
603 // Saturating counter | |
604 uint inc_taken() { | |
605 uint cnt = taken() + 1; | |
606 // Did we wrap? Will compiler screw us?? | |
607 if (cnt == 0) cnt--; | |
608 set_uint_at(taken_off_set, cnt); | |
609 return cnt; | |
610 } | |
611 | |
612 int displacement() { | |
613 return int_at(displacement_off_set); | |
614 } | |
615 | |
616 // Code generation support | |
617 static ByteSize taken_offset() { | |
618 return cell_offset(taken_off_set); | |
619 } | |
620 | |
621 static ByteSize displacement_offset() { | |
622 return cell_offset(displacement_off_set); | |
623 } | |
624 | |
625 // Specific initialization. | |
626 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
627 | |
628 #ifndef PRODUCT | |
629 void print_data_on(outputStream* st); | |
630 #endif | |
631 }; | |
632 | |
633 // ReceiverTypeData | |
634 // | |
635 // A ReceiverTypeData is used to access profiling information about a | |
636 // dynamic type check. It consists of a counter which counts the total times | |
637 // that the check is reached, and a series of (klassOop, count) pairs | |
638 // which are used to store a type profile for the receiver of the check. | |
639 class ReceiverTypeData : public CounterData { | |
640 protected: | |
641 enum { | |
642 receiver0_offset = counter_cell_count, | |
643 count0_offset, | |
644 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
645 }; | |
646 | |
647 public: | |
648 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
649 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
650 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
651 } | |
652 | |
653 virtual bool is_ReceiverTypeData() { return true; } | |
654 | |
655 static int static_cell_count() { | |
656 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
657 } | |
658 | |
659 virtual int cell_count() { | |
660 return static_cell_count(); | |
661 } | |
662 | |
663 // Direct accessors | |
664 static uint row_limit() { | |
665 return TypeProfileWidth; | |
666 } | |
667 static int receiver_cell_index(uint row) { | |
668 return receiver0_offset + row * receiver_type_row_cell_count; | |
669 } | |
670 static int receiver_count_cell_index(uint row) { | |
671 return count0_offset + row * receiver_type_row_cell_count; | |
672 } | |
673 | |
674 // Get the receiver at row. The 'unchecked' version is needed by parallel old | |
675 // gc; it does not assert the receiver is a klass. During compaction of the | |
676 // perm gen, the klass may already have moved, so the is_klass() predicate | |
677 // would fail. The 'normal' version should be used whenever possible. | |
678 klassOop receiver_unchecked(uint row) { | |
679 assert(row < row_limit(), "oob"); | |
680 oop recv = oop_at(receiver_cell_index(row)); | |
681 return (klassOop)recv; | |
682 } | |
683 | |
684 klassOop receiver(uint row) { | |
685 klassOop recv = receiver_unchecked(row); | |
686 assert(recv == NULL || ((oop)recv)->is_klass(), "wrong type"); | |
687 return recv; | |
688 } | |
689 | |
941 | 690 void set_receiver(uint row, oop p) { |
691 assert((uint)row < row_limit(), "oob"); | |
692 set_oop_at(receiver_cell_index(row), p); | |
693 } | |
694 | |
0 | 695 uint receiver_count(uint row) { |
696 assert(row < row_limit(), "oob"); | |
697 return uint_at(receiver_count_cell_index(row)); | |
698 } | |
699 | |
941 | 700 void set_receiver_count(uint row, uint count) { |
701 assert(row < row_limit(), "oob"); | |
702 set_uint_at(receiver_count_cell_index(row), count); | |
703 } | |
704 | |
705 void clear_row(uint row) { | |
706 assert(row < row_limit(), "oob"); | |
1251
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707 // Clear total count - indicator of polymorphic call site. |
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708 // The site may look like as monomorphic after that but |
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709 // it allow to have more accurate profiling information because |
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710 // there was execution phase change since klasses were unloaded. |
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711 // If the site is still polymorphic then MDO will be updated |
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712 // to reflect it. But it could be the case that the site becomes |
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713 // only bimorphic. Then keeping total count not 0 will be wrong. |
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714 // Even if we use monomorphic (when it is not) for compilation |
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715 // we will only have trap, deoptimization and recompile again |
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716 // with updated MDO after executing method in Interpreter. |
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717 // An additional receiver will be recorded in the cleaned row |
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718 // during next call execution. |
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719 // |
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720 // Note: our profiling logic works with empty rows in any slot. |
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721 // We do sorting a profiling info (ciCallProfile) for compilation. |
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722 // |
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723 set_count(0); |
941 | 724 set_receiver(row, NULL); |
725 set_receiver_count(row, 0); | |
726 } | |
727 | |
0 | 728 // Code generation support |
729 static ByteSize receiver_offset(uint row) { | |
730 return cell_offset(receiver_cell_index(row)); | |
731 } | |
732 static ByteSize receiver_count_offset(uint row) { | |
733 return cell_offset(receiver_count_cell_index(row)); | |
734 } | |
735 static ByteSize receiver_type_data_size() { | |
736 return cell_offset(static_cell_count()); | |
737 } | |
738 | |
739 // GC support | |
740 virtual void follow_contents(); | |
741 virtual void oop_iterate(OopClosure* blk); | |
742 virtual void oop_iterate_m(OopClosure* blk, MemRegion mr); | |
743 virtual void adjust_pointers(); | |
941 | 744 virtual void follow_weak_refs(BoolObjectClosure* is_alive_closure); |
0 | 745 |
746 #ifndef SERIALGC | |
747 // Parallel old support | |
748 virtual void follow_contents(ParCompactionManager* cm); | |
749 virtual void update_pointers(); | |
750 #endif // SERIALGC | |
751 | |
752 oop* adr_receiver(uint row) { | |
753 return adr_oop_at(receiver_cell_index(row)); | |
754 } | |
755 | |
756 #ifndef PRODUCT | |
757 void print_receiver_data_on(outputStream* st); | |
758 void print_data_on(outputStream* st); | |
759 #endif | |
760 }; | |
761 | |
762 // VirtualCallData | |
763 // | |
764 // A VirtualCallData is used to access profiling information about a | |
765 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
766 class VirtualCallData : public ReceiverTypeData { | |
767 public: | |
768 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
769 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
770 } | |
771 | |
772 virtual bool is_VirtualCallData() { return true; } | |
773 | |
774 static int static_cell_count() { | |
775 // At this point we could add more profile state, e.g., for arguments. | |
776 // But for now it's the same size as the base record type. | |
777 return ReceiverTypeData::static_cell_count(); | |
778 } | |
779 | |
780 virtual int cell_count() { | |
781 return static_cell_count(); | |
782 } | |
783 | |
784 // Direct accessors | |
785 static ByteSize virtual_call_data_size() { | |
786 return cell_offset(static_cell_count()); | |
787 } | |
788 | |
789 #ifndef PRODUCT | |
790 void print_data_on(outputStream* st); | |
791 #endif | |
792 }; | |
793 | |
794 // RetData | |
795 // | |
796 // A RetData is used to access profiling information for a ret bytecode. | |
797 // It is composed of a count of the number of times that the ret has | |
798 // been executed, followed by a series of triples of the form | |
799 // (bci, count, di) which count the number of times that some bci was the | |
800 // target of the ret and cache a corresponding data displacement. | |
801 class RetData : public CounterData { | |
802 protected: | |
803 enum { | |
804 bci0_offset = counter_cell_count, | |
805 count0_offset, | |
806 displacement0_offset, | |
807 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
808 }; | |
809 | |
810 void set_bci(uint row, int bci) { | |
811 assert((uint)row < row_limit(), "oob"); | |
812 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
813 } | |
814 void release_set_bci(uint row, int bci) { | |
815 assert((uint)row < row_limit(), "oob"); | |
816 // 'release' when setting the bci acts as a valid flag for other | |
817 // threads wrt bci_count and bci_displacement. | |
818 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
819 } | |
820 void set_bci_count(uint row, uint count) { | |
821 assert((uint)row < row_limit(), "oob"); | |
822 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
823 } | |
824 void set_bci_displacement(uint row, int disp) { | |
825 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
826 } | |
827 | |
828 public: | |
829 RetData(DataLayout* layout) : CounterData(layout) { | |
830 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
831 } | |
832 | |
833 virtual bool is_RetData() { return true; } | |
834 | |
835 enum { | |
836 no_bci = -1 // value of bci when bci1/2 are not in use. | |
837 }; | |
838 | |
839 static int static_cell_count() { | |
840 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
841 } | |
842 | |
843 virtual int cell_count() { | |
844 return static_cell_count(); | |
845 } | |
846 | |
847 static uint row_limit() { | |
848 return BciProfileWidth; | |
849 } | |
850 static int bci_cell_index(uint row) { | |
851 return bci0_offset + row * ret_row_cell_count; | |
852 } | |
853 static int bci_count_cell_index(uint row) { | |
854 return count0_offset + row * ret_row_cell_count; | |
855 } | |
856 static int bci_displacement_cell_index(uint row) { | |
857 return displacement0_offset + row * ret_row_cell_count; | |
858 } | |
859 | |
860 // Direct accessors | |
861 int bci(uint row) { | |
862 return int_at(bci_cell_index(row)); | |
863 } | |
864 uint bci_count(uint row) { | |
865 return uint_at(bci_count_cell_index(row)); | |
866 } | |
867 int bci_displacement(uint row) { | |
868 return int_at(bci_displacement_cell_index(row)); | |
869 } | |
870 | |
871 // Interpreter Runtime support | |
872 address fixup_ret(int return_bci, methodDataHandle mdo); | |
873 | |
874 // Code generation support | |
875 static ByteSize bci_offset(uint row) { | |
876 return cell_offset(bci_cell_index(row)); | |
877 } | |
878 static ByteSize bci_count_offset(uint row) { | |
879 return cell_offset(bci_count_cell_index(row)); | |
880 } | |
881 static ByteSize bci_displacement_offset(uint row) { | |
882 return cell_offset(bci_displacement_cell_index(row)); | |
883 } | |
884 | |
885 // Specific initialization. | |
886 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
887 | |
888 #ifndef PRODUCT | |
889 void print_data_on(outputStream* st); | |
890 #endif | |
891 }; | |
892 | |
893 // BranchData | |
894 // | |
895 // A BranchData is used to access profiling data for a two-way branch. | |
896 // It consists of taken and not_taken counts as well as a data displacement | |
897 // for the taken case. | |
898 class BranchData : public JumpData { | |
899 protected: | |
900 enum { | |
901 not_taken_off_set = jump_cell_count, | |
902 branch_cell_count | |
903 }; | |
904 | |
905 void set_displacement(int displacement) { | |
906 set_int_at(displacement_off_set, displacement); | |
907 } | |
908 | |
909 public: | |
910 BranchData(DataLayout* layout) : JumpData(layout) { | |
911 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
912 } | |
913 | |
914 virtual bool is_BranchData() { return true; } | |
915 | |
916 static int static_cell_count() { | |
917 return branch_cell_count; | |
918 } | |
919 | |
920 virtual int cell_count() { | |
921 return static_cell_count(); | |
922 } | |
923 | |
924 // Direct accessor | |
925 uint not_taken() { | |
926 return uint_at(not_taken_off_set); | |
927 } | |
928 | |
929 uint inc_not_taken() { | |
930 uint cnt = not_taken() + 1; | |
931 // Did we wrap? Will compiler screw us?? | |
932 if (cnt == 0) cnt--; | |
933 set_uint_at(not_taken_off_set, cnt); | |
934 return cnt; | |
935 } | |
936 | |
937 // Code generation support | |
938 static ByteSize not_taken_offset() { | |
939 return cell_offset(not_taken_off_set); | |
940 } | |
941 static ByteSize branch_data_size() { | |
942 return cell_offset(branch_cell_count); | |
943 } | |
944 | |
945 // Specific initialization. | |
946 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
947 | |
948 #ifndef PRODUCT | |
949 void print_data_on(outputStream* st); | |
950 #endif | |
951 }; | |
952 | |
953 // ArrayData | |
954 // | |
955 // A ArrayData is a base class for accessing profiling data which does | |
956 // not have a statically known size. It consists of an array length | |
957 // and an array start. | |
958 class ArrayData : public ProfileData { | |
959 protected: | |
960 friend class DataLayout; | |
961 | |
962 enum { | |
963 array_len_off_set, | |
964 array_start_off_set | |
965 }; | |
966 | |
967 uint array_uint_at(int index) { | |
968 int aindex = index + array_start_off_set; | |
969 return uint_at(aindex); | |
970 } | |
971 int array_int_at(int index) { | |
972 int aindex = index + array_start_off_set; | |
973 return int_at(aindex); | |
974 } | |
975 oop array_oop_at(int index) { | |
976 int aindex = index + array_start_off_set; | |
977 return oop_at(aindex); | |
978 } | |
979 void array_set_int_at(int index, int value) { | |
980 int aindex = index + array_start_off_set; | |
981 set_int_at(aindex, value); | |
982 } | |
983 | |
984 // Code generation support for subclasses. | |
985 static ByteSize array_element_offset(int index) { | |
986 return cell_offset(array_start_off_set + index); | |
987 } | |
988 | |
989 public: | |
990 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
991 | |
992 virtual bool is_ArrayData() { return true; } | |
993 | |
994 static int static_cell_count() { | |
995 return -1; | |
996 } | |
997 | |
998 int array_len() { | |
999 return int_at_unchecked(array_len_off_set); | |
1000 } | |
1001 | |
1002 virtual int cell_count() { | |
1003 return array_len() + 1; | |
1004 } | |
1005 | |
1006 // Code generation support | |
1007 static ByteSize array_len_offset() { | |
1008 return cell_offset(array_len_off_set); | |
1009 } | |
1010 static ByteSize array_start_offset() { | |
1011 return cell_offset(array_start_off_set); | |
1012 } | |
1013 }; | |
1014 | |
1015 // MultiBranchData | |
1016 // | |
1017 // A MultiBranchData is used to access profiling information for | |
1018 // a multi-way branch (*switch bytecodes). It consists of a series | |
1019 // of (count, displacement) pairs, which count the number of times each | |
1020 // case was taken and specify the data displacment for each branch target. | |
1021 class MultiBranchData : public ArrayData { | |
1022 protected: | |
1023 enum { | |
1024 default_count_off_set, | |
1025 default_disaplacement_off_set, | |
1026 case_array_start | |
1027 }; | |
1028 enum { | |
1029 relative_count_off_set, | |
1030 relative_displacement_off_set, | |
1031 per_case_cell_count | |
1032 }; | |
1033 | |
1034 void set_default_displacement(int displacement) { | |
1035 array_set_int_at(default_disaplacement_off_set, displacement); | |
1036 } | |
1037 void set_displacement_at(int index, int displacement) { | |
1038 array_set_int_at(case_array_start + | |
1039 index * per_case_cell_count + | |
1040 relative_displacement_off_set, | |
1041 displacement); | |
1042 } | |
1043 | |
1044 public: | |
1045 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1046 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1047 } | |
1048 | |
1049 virtual bool is_MultiBranchData() { return true; } | |
1050 | |
1051 static int compute_cell_count(BytecodeStream* stream); | |
1052 | |
1053 int number_of_cases() { | |
1054 int alen = array_len() - 2; // get rid of default case here. | |
1055 assert(alen % per_case_cell_count == 0, "must be even"); | |
1056 return (alen / per_case_cell_count); | |
1057 } | |
1058 | |
1059 uint default_count() { | |
1060 return array_uint_at(default_count_off_set); | |
1061 } | |
1062 int default_displacement() { | |
1063 return array_int_at(default_disaplacement_off_set); | |
1064 } | |
1065 | |
1066 uint count_at(int index) { | |
1067 return array_uint_at(case_array_start + | |
1068 index * per_case_cell_count + | |
1069 relative_count_off_set); | |
1070 } | |
1071 int displacement_at(int index) { | |
1072 return array_int_at(case_array_start + | |
1073 index * per_case_cell_count + | |
1074 relative_displacement_off_set); | |
1075 } | |
1076 | |
1077 // Code generation support | |
1078 static ByteSize default_count_offset() { | |
1079 return array_element_offset(default_count_off_set); | |
1080 } | |
1081 static ByteSize default_displacement_offset() { | |
1082 return array_element_offset(default_disaplacement_off_set); | |
1083 } | |
1084 static ByteSize case_count_offset(int index) { | |
1085 return case_array_offset() + | |
1086 (per_case_size() * index) + | |
1087 relative_count_offset(); | |
1088 } | |
1089 static ByteSize case_array_offset() { | |
1090 return array_element_offset(case_array_start); | |
1091 } | |
1092 static ByteSize per_case_size() { | |
1093 return in_ByteSize(per_case_cell_count) * cell_size; | |
1094 } | |
1095 static ByteSize relative_count_offset() { | |
1096 return in_ByteSize(relative_count_off_set) * cell_size; | |
1097 } | |
1098 static ByteSize relative_displacement_offset() { | |
1099 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1100 } | |
1101 | |
1102 // Specific initialization. | |
1103 void post_initialize(BytecodeStream* stream, methodDataOop mdo); | |
1104 | |
1105 #ifndef PRODUCT | |
1106 void print_data_on(outputStream* st); | |
1107 #endif | |
1108 }; | |
1109 | |
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1110 class ArgInfoData : public ArrayData { |
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1111 |
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1112 public: |
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1113 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1114 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1115 } |
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1116 |
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1117 virtual bool is_ArgInfoData() { return true; } |
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1118 |
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1119 |
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1120 int number_of_args() { |
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1121 return array_len(); |
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1122 } |
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1123 |
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1124 uint arg_modified(int arg) { |
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1125 return array_uint_at(arg); |
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1126 } |
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1127 |
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1128 void set_arg_modified(int arg, uint val) { |
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1129 array_set_int_at(arg, val); |
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1130 } |
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1131 |
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1132 #ifndef PRODUCT |
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1133 void print_data_on(outputStream* st); |
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1134 #endif |
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1135 }; |
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1136 |
0 | 1137 // methodDataOop |
1138 // | |
1139 // A methodDataOop holds information which has been collected about | |
1140 // a method. Its layout looks like this: | |
1141 // | |
1142 // ----------------------------- | |
1143 // | header | | |
1144 // | klass | | |
1145 // ----------------------------- | |
1146 // | method | | |
1147 // | size of the methodDataOop | | |
1148 // ----------------------------- | |
1149 // | Data entries... | | |
1150 // | (variable size) | | |
1151 // | | | |
1152 // . . | |
1153 // . . | |
1154 // . . | |
1155 // | | | |
1156 // ----------------------------- | |
1157 // | |
1158 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1159 // DataLayout in the array corresponds to a specific bytecode in the | |
1160 // method. The entries in the array are sorted by the corresponding | |
1161 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1162 // which point to the underlying blocks of DataLayout structures. | |
1163 // | |
1164 // During interpretation, if profiling in enabled, the interpreter | |
1165 // maintains a method data pointer (mdp), which points at the entry | |
1166 // in the array corresponding to the current bci. In the course of | |
1167 // intepretation, when a bytecode is encountered that has profile data | |
1168 // associated with it, the entry pointed to by mdp is updated, then the | |
1169 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1170 // is NULL to begin with, the interpreter assumes that the current method | |
1171 // is not (yet) being profiled. | |
1172 // | |
1173 // In methodDataOop parlance, "dp" is a "data pointer", the actual address | |
1174 // of a DataLayout element. A "di" is a "data index", the offset in bytes | |
1175 // from the base of the data entry array. A "displacement" is the byte offset | |
1176 // in certain ProfileData objects that indicate the amount the mdp must be | |
1177 // adjusted in the event of a change in control flow. | |
1178 // | |
1179 | |
1180 class methodDataOopDesc : public oopDesc { | |
1181 friend class VMStructs; | |
1182 private: | |
1183 friend class ProfileData; | |
1184 | |
1185 // Back pointer to the methodOop | |
1186 methodOop _method; | |
1187 | |
1188 // Size of this oop in bytes | |
1189 int _size; | |
1190 | |
1191 // Cached hint for bci_to_dp and bci_to_data | |
1192 int _hint_di; | |
1193 | |
1194 // Whole-method sticky bits and flags | |
1195 public: | |
1196 enum { | |
1197 _trap_hist_limit = 16, // decoupled from Deoptimization::Reason_LIMIT | |
1198 _trap_hist_mask = max_jubyte, | |
1199 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1200 }; // Public flag values | |
1201 private: | |
1202 uint _nof_decompiles; // count of all nmethod removals | |
1203 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1204 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1205 union { | |
1206 intptr_t _align; | |
1207 u1 _array[_trap_hist_limit]; | |
1208 } _trap_hist; | |
1209 | |
1210 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1211 intx _eflags; // flags on escape information | |
1212 intx _arg_local; // bit set of non-escaping arguments | |
1213 intx _arg_stack; // bit set of stack-allocatable arguments | |
1214 intx _arg_returned; // bit set of returned arguments | |
1215 | |
1783 | 1216 int _creation_mileage; // method mileage at MDO creation |
1217 | |
1218 // How many invocations has this MDO seen? | |
1219 // These counters are used to determine the exact age of MDO. | |
1220 // We need those because in tiered a method can be concurrently | |
1221 // executed at different levels. | |
1222 InvocationCounter _invocation_counter; | |
1223 // Same for backedges. | |
1224 InvocationCounter _backedge_counter; | |
2252 | 1225 // Counter values at the time profiling started. |
1226 int _invocation_counter_start; | |
1227 int _backedge_counter_start; | |
1783 | 1228 // Number of loops and blocks is computed when compiling the first |
1229 // time with C1. It is used to determine if method is trivial. | |
1230 short _num_loops; | |
1231 short _num_blocks; | |
1232 // Highest compile level this method has ever seen. | |
1233 u1 _highest_comp_level; | |
1234 // Same for OSR level | |
1235 u1 _highest_osr_comp_level; | |
1236 // Does this method contain anything worth profiling? | |
1237 bool _would_profile; | |
0 | 1238 |
1239 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1240 int _data_size; | |
1241 | |
1242 // Beginning of the data entries | |
1243 intptr_t _data[1]; | |
1244 | |
1245 // Helper for size computation | |
1246 static int compute_data_size(BytecodeStream* stream); | |
1247 static int bytecode_cell_count(Bytecodes::Code code); | |
1248 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1249 | |
1250 // Helper for initialization | |
1251 DataLayout* data_layout_at(int data_index) { | |
1252 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); | |
1253 return (DataLayout*) (((address)_data) + data_index); | |
1254 } | |
1255 | |
1256 // Initialize an individual data segment. Returns the size of | |
1257 // the segment in bytes. | |
1258 int initialize_data(BytecodeStream* stream, int data_index); | |
1259 | |
1260 // Helper for data_at | |
1261 DataLayout* limit_data_position() { | |
1262 return (DataLayout*)((address)data_base() + _data_size); | |
1263 } | |
1264 bool out_of_bounds(int data_index) { | |
1265 return data_index >= data_size(); | |
1266 } | |
1267 | |
1268 // Give each of the data entries a chance to perform specific | |
1269 // data initialization. | |
1270 void post_initialize(BytecodeStream* stream); | |
1271 | |
1272 // hint accessors | |
1273 int hint_di() const { return _hint_di; } | |
1274 void set_hint_di(int di) { | |
1275 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1276 _hint_di = di; | |
1277 } | |
1278 ProfileData* data_before(int bci) { | |
1279 // avoid SEGV on this edge case | |
1280 if (data_size() == 0) | |
1281 return NULL; | |
1282 int hint = hint_di(); | |
1283 if (data_layout_at(hint)->bci() <= bci) | |
1284 return data_at(hint); | |
1285 return first_data(); | |
1286 } | |
1287 | |
1288 // What is the index of the first data entry? | |
1289 int first_di() { return 0; } | |
1290 | |
1291 // Find or create an extra ProfileData: | |
1292 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1293 | |
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1294 // return the argument info cell |
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1295 ArgInfoData *arg_info(); |
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1296 |
0 | 1297 public: |
1298 static int header_size() { | |
1299 return sizeof(methodDataOopDesc)/wordSize; | |
1300 } | |
1301 | |
1302 // Compute the size of a methodDataOop before it is created. | |
1303 static int compute_allocation_size_in_bytes(methodHandle method); | |
1304 static int compute_allocation_size_in_words(methodHandle method); | |
1305 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1306 | |
1307 // Determine if a given bytecode can have profile information. | |
1308 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1309 return bytecode_cell_count(code) != no_profile_data; | |
1310 } | |
1311 | |
1312 // Perform initialization of a new methodDataOop | |
1313 void initialize(methodHandle method); | |
1314 | |
1315 // My size | |
1316 int object_size_in_bytes() { return _size; } | |
1317 int object_size() { | |
1318 return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); | |
1319 } | |
1320 | |
1321 int creation_mileage() const { return _creation_mileage; } | |
1322 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1323 |
1324 int invocation_count() { | |
1325 if (invocation_counter()->carry()) { | |
1326 return InvocationCounter::count_limit; | |
1327 } | |
1328 return invocation_counter()->count(); | |
1329 } | |
1330 int backedge_count() { | |
1331 if (backedge_counter()->carry()) { | |
1332 return InvocationCounter::count_limit; | |
1333 } | |
1334 return backedge_counter()->count(); | |
1335 } | |
1336 | |
2252 | 1337 int invocation_count_start() { |
1338 if (invocation_counter()->carry()) { | |
1339 return 0; | |
1340 } | |
1341 return _invocation_counter_start; | |
1342 } | |
1343 | |
1344 int backedge_count_start() { | |
1345 if (backedge_counter()->carry()) { | |
1346 return 0; | |
1347 } | |
1348 return _backedge_counter_start; | |
1349 } | |
1350 | |
1351 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1352 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1353 | |
1354 void reset_start_counters() { | |
1355 _invocation_counter_start = invocation_count(); | |
1356 _backedge_counter_start = backedge_count(); | |
1357 } | |
1358 | |
1783 | 1359 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1360 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1361 | |
1362 void set_would_profile(bool p) { _would_profile = p; } | |
1363 bool would_profile() const { return _would_profile; } | |
1364 | |
1365 int highest_comp_level() { return _highest_comp_level; } | |
1366 void set_highest_comp_level(int level) { _highest_comp_level = level; } | |
1367 int highest_osr_comp_level() { return _highest_osr_comp_level; } | |
1368 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } | |
1369 | |
1370 int num_loops() const { return _num_loops; } | |
1371 void set_num_loops(int n) { _num_loops = n; } | |
1372 int num_blocks() const { return _num_blocks; } | |
1373 void set_num_blocks(int n) { _num_blocks = n; } | |
1374 | |
0 | 1375 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
1376 static int mileage_of(methodOop m); | |
1377 | |
1378 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1379 enum EscapeFlag { | |
1380 estimated = 1 << 0, | |
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1381 return_local = 1 << 1, |
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1382 return_allocated = 1 << 2, |
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1383 allocated_escapes = 1 << 3, |
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1384 unknown_modified = 1 << 4 |
0 | 1385 }; |
1386 | |
1387 intx eflags() { return _eflags; } | |
1388 intx arg_local() { return _arg_local; } | |
1389 intx arg_stack() { return _arg_stack; } | |
1390 intx arg_returned() { return _arg_returned; } | |
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1391 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1392 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1393 return aid->arg_modified(a); } |
0 | 1394 |
1395 void set_eflags(intx v) { _eflags = v; } | |
1396 void set_arg_local(intx v) { _arg_local = v; } | |
1397 void set_arg_stack(intx v) { _arg_stack = v; } | |
1398 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1399 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1400 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1401 |
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1402 aid->set_arg_modified(a, v); } |
0 | 1403 |
1404 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1405 | |
1406 // Location and size of data area | |
1407 address data_base() const { | |
1408 return (address) _data; | |
1409 } | |
1410 int data_size() { | |
1411 return _data_size; | |
1412 } | |
1413 | |
1414 // Accessors | |
1415 methodOop method() { return _method; } | |
1416 | |
1417 // Get the data at an arbitrary (sort of) data index. | |
1418 ProfileData* data_at(int data_index); | |
1419 | |
1420 // Walk through the data in order. | |
1421 ProfileData* first_data() { return data_at(first_di()); } | |
1422 ProfileData* next_data(ProfileData* current); | |
1423 bool is_valid(ProfileData* current) { return current != NULL; } | |
1424 | |
1425 // Convert a dp (data pointer) to a di (data index). | |
1426 int dp_to_di(address dp) { | |
1427 return dp - ((address)_data); | |
1428 } | |
1429 | |
1430 address di_to_dp(int di) { | |
1431 return (address)data_layout_at(di); | |
1432 } | |
1433 | |
1434 // bci to di/dp conversion. | |
1435 address bci_to_dp(int bci); | |
1436 int bci_to_di(int bci) { | |
1437 return dp_to_di(bci_to_dp(bci)); | |
1438 } | |
1439 | |
1440 // Get the data at an arbitrary bci, or NULL if there is none. | |
1441 ProfileData* bci_to_data(int bci); | |
1442 | |
1443 // Same, but try to create an extra_data record if one is needed: | |
1444 ProfileData* allocate_bci_to_data(int bci) { | |
1445 ProfileData* data = bci_to_data(bci); | |
1446 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1447 } | |
1448 | |
1449 // Add a handful of extra data records, for trap tracking. | |
1450 DataLayout* extra_data_base() { return limit_data_position(); } | |
1451 DataLayout* extra_data_limit() { return (DataLayout*)((address)this + object_size_in_bytes()); } | |
1452 int extra_data_size() { return (address)extra_data_limit() | |
1453 - (address)extra_data_base(); } | |
1454 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1455 | |
1456 // Return (uint)-1 for overflow. | |
1457 uint trap_count(int reason) const { | |
1458 assert((uint)reason < _trap_hist_limit, "oob"); | |
1459 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1460 } | |
1461 // For loops: | |
1462 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1463 static uint trap_count_limit() { return _trap_hist_mask; } | |
1464 uint inc_trap_count(int reason) { | |
1465 // Count another trap, anywhere in this method. | |
1466 assert(reason >= 0, "must be single trap"); | |
1467 if ((uint)reason < _trap_hist_limit) { | |
1468 uint cnt1 = 1 + _trap_hist._array[reason]; | |
1469 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
1470 _trap_hist._array[reason] = cnt1; | |
1471 return cnt1; | |
1472 } else { | |
1473 return _trap_hist_mask + (++_nof_overflow_traps); | |
1474 } | |
1475 } else { | |
1476 // Could not represent the count in the histogram. | |
1477 return (++_nof_overflow_traps); | |
1478 } | |
1479 } | |
1480 | |
1481 uint overflow_trap_count() const { | |
1482 return _nof_overflow_traps; | |
1483 } | |
1484 uint overflow_recompile_count() const { | |
1485 return _nof_overflow_recompiles; | |
1486 } | |
1487 void inc_overflow_recompile_count() { | |
1488 _nof_overflow_recompiles += 1; | |
1489 } | |
1490 uint decompile_count() const { | |
1491 return _nof_decompiles; | |
1492 } | |
1493 void inc_decompile_count() { | |
1494 _nof_decompiles += 1; | |
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1495 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
1783 | 1496 method()->set_not_compilable(CompLevel_full_optimization); |
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1497 } |
0 | 1498 } |
1499 | |
1500 // Support for code generation | |
1501 static ByteSize data_offset() { | |
1502 return byte_offset_of(methodDataOopDesc, _data[0]); | |
1503 } | |
1504 | |
1783 | 1505 static ByteSize invocation_counter_offset() { |
1506 return byte_offset_of(methodDataOopDesc, _invocation_counter); | |
1507 } | |
1508 static ByteSize backedge_counter_offset() { | |
1509 return byte_offset_of(methodDataOopDesc, _backedge_counter); | |
1510 } | |
1511 | |
0 | 1512 // GC support |
1513 oop* adr_method() const { return (oop*)&_method; } | |
1514 bool object_is_parsable() const { return _size != 0; } | |
1515 void set_object_is_parsable(int object_size_in_bytes) { _size = object_size_in_bytes; } | |
1516 | |
1517 #ifndef PRODUCT | |
1518 // printing support for method data | |
1519 void print_data_on(outputStream* st); | |
1520 #endif | |
1521 | |
1522 // verification | |
1523 void verify_data_on(outputStream* st); | |
1524 }; | |
1972 | 1525 |
1526 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |