Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodData.hpp @ 12816:2720ab7a0d70
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author | ccheung |
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date | Fri, 04 Oct 2013 21:00:43 -0700 |
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0 | 1 /* |
7956 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_METHODDATAOOP_HPP |
26 #define SHARE_VM_OOPS_METHODDATAOOP_HPP | |
27 | |
28 #include "interpreter/bytecodes.hpp" | |
29 #include "memory/universe.hpp" | |
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30 #include "oops/method.hpp" |
1972 | 31 #include "oops/oop.hpp" |
32 #include "runtime/orderAccess.hpp" | |
33 | |
0 | 34 class BytecodeStream; |
7956 | 35 class KlassSizeStats; |
0 | 36 |
37 // The MethodData object collects counts and other profile information | |
38 // during zeroth-tier (interpretive) and first-tier execution. | |
39 // The profile is used later by compilation heuristics. Some heuristics | |
40 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
41 // optimization often has a down-side, a corner case that it handles | |
42 // poorly, but which is thought to be rare. The profile provides | |
43 // evidence of this rarity for a given method or even BCI. It allows | |
44 // the compiler to back out of the optimization at places where it | |
45 // has historically been a poor choice. Other heuristics try to use | |
46 // specific information gathered about types observed at a given site. | |
47 // | |
48 // All data in the profile is approximate. It is expected to be accurate | |
49 // on the whole, but the system expects occasional inaccuraces, due to | |
50 // counter overflow, multiprocessor races during data collection, space | |
51 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
52 // optimization quality but will not affect correctness. Also, each MDO | |
53 // is marked with its birth-date ("creation_mileage") which can be used | |
54 // to assess the quality ("maturity") of its data. | |
55 // | |
56 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
57 // state. Also, certain recorded per-BCI events are given one-bit counters | |
58 // which overflow to a saturated state which applied to all counters at | |
59 // that BCI. In other words, there is a small lattice which approximates | |
60 // the ideal of an infinite-precision counter for each event at each BCI, | |
61 // and the lattice quickly "bottoms out" in a state where all counters | |
62 // are taken to be indefinitely large. | |
63 // | |
64 // The reader will find many data races in profile gathering code, starting | |
65 // with invocation counter incrementation. None of these races harm correct | |
66 // execution of the compiled code. | |
67 | |
941 | 68 // forward decl |
69 class ProfileData; | |
70 | |
0 | 71 // DataLayout |
72 // | |
73 // Overlay for generic profiling data. | |
74 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
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75 friend class VMStructs; |
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76 |
0 | 77 private: |
78 // Every data layout begins with a header. This header | |
79 // contains a tag, which is used to indicate the size/layout | |
80 // of the data, 4 bits of flags, which can be used in any way, | |
81 // 4 bits of trap history (none/one reason/many reasons), | |
82 // and a bci, which is used to tie this piece of data to a | |
83 // specific bci in the bytecodes. | |
84 union { | |
85 intptr_t _bits; | |
86 struct { | |
87 u1 _tag; | |
88 u1 _flags; | |
89 u2 _bci; | |
90 } _struct; | |
91 } _header; | |
92 | |
93 // The data layout has an arbitrary number of cells, each sized | |
94 // to accomodate a pointer or an integer. | |
95 intptr_t _cells[1]; | |
96 | |
97 // Some types of data layouts need a length field. | |
98 static bool needs_array_len(u1 tag); | |
99 | |
100 public: | |
101 enum { | |
102 counter_increment = 1 | |
103 }; | |
104 | |
105 enum { | |
106 cell_size = sizeof(intptr_t) | |
107 }; | |
108 | |
109 // Tag values | |
110 enum { | |
111 no_tag, | |
112 bit_data_tag, | |
113 counter_data_tag, | |
114 jump_data_tag, | |
115 receiver_type_data_tag, | |
116 virtual_call_data_tag, | |
117 ret_data_tag, | |
118 branch_data_tag, | |
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119 multi_branch_data_tag, |
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120 arg_info_data_tag |
0 | 121 }; |
122 | |
123 enum { | |
124 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
125 // The trap state breaks down further as [recompile:1 | reason:3]. | |
126 // This further breakdown is defined in deoptimization.cpp. | |
127 // See Deoptimization::trap_state_reason for an assert that | |
128 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
129 // | |
130 // The trap_state is collected only if ProfileTraps is true. | |
131 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
132 trap_shift = BitsPerByte - trap_bits, | |
133 trap_mask = right_n_bits(trap_bits), | |
134 trap_mask_in_place = (trap_mask << trap_shift), | |
135 flag_limit = trap_shift, | |
136 flag_mask = right_n_bits(flag_limit), | |
137 first_flag = 0 | |
138 }; | |
139 | |
140 // Size computation | |
141 static int header_size_in_bytes() { | |
142 return cell_size; | |
143 } | |
144 static int header_size_in_cells() { | |
145 return 1; | |
146 } | |
147 | |
148 static int compute_size_in_bytes(int cell_count) { | |
149 return header_size_in_bytes() + cell_count * cell_size; | |
150 } | |
151 | |
152 // Initialization | |
153 void initialize(u1 tag, u2 bci, int cell_count); | |
154 | |
155 // Accessors | |
156 u1 tag() { | |
157 return _header._struct._tag; | |
158 } | |
159 | |
160 // Return a few bits of trap state. Range is [0..trap_mask]. | |
161 // The state tells if traps with zero, one, or many reasons have occurred. | |
162 // It also tells whether zero or many recompilations have occurred. | |
163 // The associated trap histogram in the MDO itself tells whether | |
164 // traps are common or not. If a BCI shows that a trap X has | |
165 // occurred, and the MDO shows N occurrences of X, we make the | |
166 // simplifying assumption that all N occurrences can be blamed | |
167 // on that BCI. | |
168 int trap_state() { | |
169 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
170 } | |
171 | |
172 void set_trap_state(int new_state) { | |
173 assert(ProfileTraps, "used only under +ProfileTraps"); | |
174 uint old_flags = (_header._struct._flags & flag_mask); | |
175 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
176 } | |
177 | |
178 u1 flags() { | |
179 return _header._struct._flags; | |
180 } | |
181 | |
182 u2 bci() { | |
183 return _header._struct._bci; | |
184 } | |
185 | |
186 void set_header(intptr_t value) { | |
187 _header._bits = value; | |
188 } | |
189 void release_set_header(intptr_t value) { | |
190 OrderAccess::release_store_ptr(&_header._bits, value); | |
191 } | |
192 intptr_t header() { | |
193 return _header._bits; | |
194 } | |
195 void set_cell_at(int index, intptr_t value) { | |
196 _cells[index] = value; | |
197 } | |
198 void release_set_cell_at(int index, intptr_t value) { | |
199 OrderAccess::release_store_ptr(&_cells[index], value); | |
200 } | |
201 intptr_t cell_at(int index) { | |
202 return _cells[index]; | |
203 } | |
204 | |
205 void set_flag_at(int flag_number) { | |
206 assert(flag_number < flag_limit, "oob"); | |
207 _header._struct._flags |= (0x1 << flag_number); | |
208 } | |
209 bool flag_at(int flag_number) { | |
210 assert(flag_number < flag_limit, "oob"); | |
211 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
212 } | |
213 | |
214 // Low-level support for code generation. | |
215 static ByteSize header_offset() { | |
216 return byte_offset_of(DataLayout, _header); | |
217 } | |
218 static ByteSize tag_offset() { | |
219 return byte_offset_of(DataLayout, _header._struct._tag); | |
220 } | |
221 static ByteSize flags_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._flags); | |
223 } | |
224 static ByteSize bci_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._bci); | |
226 } | |
227 static ByteSize cell_offset(int index) { | |
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228 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 229 } |
230 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
231 static int flag_number_to_byte_constant(int flag_number) { | |
232 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
233 DataLayout temp; temp.set_header(0); | |
234 temp.set_flag_at(flag_number); | |
235 return temp._header._struct._flags; | |
236 } | |
237 // Return a value which, when or-ed as a word into _header, sets the flag. | |
238 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
239 DataLayout temp; temp.set_header(0); | |
240 temp._header._struct._flags = byte_constant; | |
241 return temp._header._bits; | |
242 } | |
941 | 243 |
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244 ProfileData* data_in(); |
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245 |
941 | 246 // GC support |
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247 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 248 }; |
249 | |
250 | |
251 // ProfileData class hierarchy | |
252 class ProfileData; | |
253 class BitData; | |
254 class CounterData; | |
255 class ReceiverTypeData; | |
256 class VirtualCallData; | |
257 class RetData; | |
258 class JumpData; | |
259 class BranchData; | |
260 class ArrayData; | |
261 class MultiBranchData; | |
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262 class ArgInfoData; |
0 | 263 |
264 | |
265 // ProfileData | |
266 // | |
267 // A ProfileData object is created to refer to a section of profiling | |
268 // data in a structured way. | |
269 class ProfileData : public ResourceObj { | |
270 private: | |
271 #ifndef PRODUCT | |
272 enum { | |
273 tab_width_one = 16, | |
274 tab_width_two = 36 | |
275 }; | |
276 #endif // !PRODUCT | |
277 | |
278 // This is a pointer to a section of profiling data. | |
279 DataLayout* _data; | |
280 | |
281 protected: | |
282 DataLayout* data() { return _data; } | |
283 | |
284 enum { | |
285 cell_size = DataLayout::cell_size | |
286 }; | |
287 | |
288 public: | |
289 // How many cells are in this? | |
290 virtual int cell_count() { | |
291 ShouldNotReachHere(); | |
292 return -1; | |
293 } | |
294 | |
295 // Return the size of this data. | |
296 int size_in_bytes() { | |
297 return DataLayout::compute_size_in_bytes(cell_count()); | |
298 } | |
299 | |
300 protected: | |
301 // Low-level accessors for underlying data | |
302 void set_intptr_at(int index, intptr_t value) { | |
303 assert(0 <= index && index < cell_count(), "oob"); | |
304 data()->set_cell_at(index, value); | |
305 } | |
306 void release_set_intptr_at(int index, intptr_t value) { | |
307 assert(0 <= index && index < cell_count(), "oob"); | |
308 data()->release_set_cell_at(index, value); | |
309 } | |
310 intptr_t intptr_at(int index) { | |
311 assert(0 <= index && index < cell_count(), "oob"); | |
312 return data()->cell_at(index); | |
313 } | |
314 void set_uint_at(int index, uint value) { | |
315 set_intptr_at(index, (intptr_t) value); | |
316 } | |
317 void release_set_uint_at(int index, uint value) { | |
318 release_set_intptr_at(index, (intptr_t) value); | |
319 } | |
320 uint uint_at(int index) { | |
321 return (uint)intptr_at(index); | |
322 } | |
323 void set_int_at(int index, int value) { | |
324 set_intptr_at(index, (intptr_t) value); | |
325 } | |
326 void release_set_int_at(int index, int value) { | |
327 release_set_intptr_at(index, (intptr_t) value); | |
328 } | |
329 int int_at(int index) { | |
330 return (int)intptr_at(index); | |
331 } | |
332 int int_at_unchecked(int index) { | |
333 return (int)data()->cell_at(index); | |
334 } | |
335 void set_oop_at(int index, oop value) { | |
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336 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 337 } |
338 oop oop_at(int index) { | |
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339 return cast_to_oop(intptr_at(index)); |
0 | 340 } |
341 | |
342 void set_flag_at(int flag_number) { | |
343 data()->set_flag_at(flag_number); | |
344 } | |
345 bool flag_at(int flag_number) { | |
346 return data()->flag_at(flag_number); | |
347 } | |
348 | |
349 // two convenient imports for use by subclasses: | |
350 static ByteSize cell_offset(int index) { | |
351 return DataLayout::cell_offset(index); | |
352 } | |
353 static int flag_number_to_byte_constant(int flag_number) { | |
354 return DataLayout::flag_number_to_byte_constant(flag_number); | |
355 } | |
356 | |
357 ProfileData(DataLayout* data) { | |
358 _data = data; | |
359 } | |
360 | |
361 public: | |
362 // Constructor for invalid ProfileData. | |
363 ProfileData(); | |
364 | |
365 u2 bci() { | |
366 return data()->bci(); | |
367 } | |
368 | |
369 address dp() { | |
370 return (address)_data; | |
371 } | |
372 | |
373 int trap_state() { | |
374 return data()->trap_state(); | |
375 } | |
376 void set_trap_state(int new_state) { | |
377 data()->set_trap_state(new_state); | |
378 } | |
379 | |
380 // Type checking | |
381 virtual bool is_BitData() { return false; } | |
382 virtual bool is_CounterData() { return false; } | |
383 virtual bool is_JumpData() { return false; } | |
384 virtual bool is_ReceiverTypeData(){ return false; } | |
385 virtual bool is_VirtualCallData() { return false; } | |
386 virtual bool is_RetData() { return false; } | |
387 virtual bool is_BranchData() { return false; } | |
388 virtual bool is_ArrayData() { return false; } | |
389 virtual bool is_MultiBranchData() { return false; } | |
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390 virtual bool is_ArgInfoData() { return false; } |
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391 |
0 | 392 |
393 BitData* as_BitData() { | |
394 assert(is_BitData(), "wrong type"); | |
395 return is_BitData() ? (BitData*) this : NULL; | |
396 } | |
397 CounterData* as_CounterData() { | |
398 assert(is_CounterData(), "wrong type"); | |
399 return is_CounterData() ? (CounterData*) this : NULL; | |
400 } | |
401 JumpData* as_JumpData() { | |
402 assert(is_JumpData(), "wrong type"); | |
403 return is_JumpData() ? (JumpData*) this : NULL; | |
404 } | |
405 ReceiverTypeData* as_ReceiverTypeData() { | |
406 assert(is_ReceiverTypeData(), "wrong type"); | |
407 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
408 } | |
409 VirtualCallData* as_VirtualCallData() { | |
410 assert(is_VirtualCallData(), "wrong type"); | |
411 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
412 } | |
413 RetData* as_RetData() { | |
414 assert(is_RetData(), "wrong type"); | |
415 return is_RetData() ? (RetData*) this : NULL; | |
416 } | |
417 BranchData* as_BranchData() { | |
418 assert(is_BranchData(), "wrong type"); | |
419 return is_BranchData() ? (BranchData*) this : NULL; | |
420 } | |
421 ArrayData* as_ArrayData() { | |
422 assert(is_ArrayData(), "wrong type"); | |
423 return is_ArrayData() ? (ArrayData*) this : NULL; | |
424 } | |
425 MultiBranchData* as_MultiBranchData() { | |
426 assert(is_MultiBranchData(), "wrong type"); | |
427 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
428 } | |
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429 ArgInfoData* as_ArgInfoData() { |
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430 assert(is_ArgInfoData(), "wrong type"); |
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431 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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432 } |
0 | 433 |
434 | |
435 // Subclass specific initialization | |
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436 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 437 |
438 // GC support | |
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439 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 440 |
441 // CI translation: ProfileData can represent both MethodDataOop data | |
442 // as well as CIMethodData data. This function is provided for translating | |
443 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
444 // most ProfileData don't require any translation, so we provide the null | |
445 // translation here, and the required translators are in the ci subclasses. | |
446 virtual void translate_from(ProfileData* data) {} | |
447 | |
448 virtual void print_data_on(outputStream* st) { | |
449 ShouldNotReachHere(); | |
450 } | |
451 | |
452 #ifndef PRODUCT | |
453 void print_shared(outputStream* st, const char* name); | |
454 void tab(outputStream* st); | |
455 #endif | |
456 }; | |
457 | |
458 // BitData | |
459 // | |
460 // A BitData holds a flag or two in its header. | |
461 class BitData : public ProfileData { | |
462 protected: | |
463 enum { | |
464 // null_seen: | |
465 // saw a null operand (cast/aastore/instanceof) | |
466 null_seen_flag = DataLayout::first_flag + 0 | |
467 }; | |
468 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
469 public: | |
470 BitData(DataLayout* layout) : ProfileData(layout) { | |
471 } | |
472 | |
473 virtual bool is_BitData() { return true; } | |
474 | |
475 static int static_cell_count() { | |
476 return bit_cell_count; | |
477 } | |
478 | |
479 virtual int cell_count() { | |
480 return static_cell_count(); | |
481 } | |
482 | |
483 // Accessor | |
484 | |
485 // The null_seen flag bit is specially known to the interpreter. | |
486 // Consulting it allows the compiler to avoid setting up null_check traps. | |
487 bool null_seen() { return flag_at(null_seen_flag); } | |
488 void set_null_seen() { set_flag_at(null_seen_flag); } | |
489 | |
490 | |
491 // Code generation support | |
492 static int null_seen_byte_constant() { | |
493 return flag_number_to_byte_constant(null_seen_flag); | |
494 } | |
495 | |
496 static ByteSize bit_data_size() { | |
497 return cell_offset(bit_cell_count); | |
498 } | |
499 | |
500 #ifndef PRODUCT | |
501 void print_data_on(outputStream* st); | |
502 #endif | |
503 }; | |
504 | |
505 // CounterData | |
506 // | |
507 // A CounterData corresponds to a simple counter. | |
508 class CounterData : public BitData { | |
509 protected: | |
510 enum { | |
511 count_off, | |
512 counter_cell_count | |
513 }; | |
514 public: | |
515 CounterData(DataLayout* layout) : BitData(layout) {} | |
516 | |
517 virtual bool is_CounterData() { return true; } | |
518 | |
519 static int static_cell_count() { | |
520 return counter_cell_count; | |
521 } | |
522 | |
523 virtual int cell_count() { | |
524 return static_cell_count(); | |
525 } | |
526 | |
527 // Direct accessor | |
528 uint count() { | |
529 return uint_at(count_off); | |
530 } | |
531 | |
532 // Code generation support | |
533 static ByteSize count_offset() { | |
534 return cell_offset(count_off); | |
535 } | |
536 static ByteSize counter_data_size() { | |
537 return cell_offset(counter_cell_count); | |
538 } | |
539 | |
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540 void set_count(uint count) { |
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541 set_uint_at(count_off, count); |
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542 } |
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543 |
0 | 544 #ifndef PRODUCT |
545 void print_data_on(outputStream* st); | |
546 #endif | |
547 }; | |
548 | |
549 // JumpData | |
550 // | |
551 // A JumpData is used to access profiling information for a direct | |
552 // branch. It is a counter, used for counting the number of branches, | |
553 // plus a data displacement, used for realigning the data pointer to | |
554 // the corresponding target bci. | |
555 class JumpData : public ProfileData { | |
556 protected: | |
557 enum { | |
558 taken_off_set, | |
559 displacement_off_set, | |
560 jump_cell_count | |
561 }; | |
562 | |
563 void set_displacement(int displacement) { | |
564 set_int_at(displacement_off_set, displacement); | |
565 } | |
566 | |
567 public: | |
568 JumpData(DataLayout* layout) : ProfileData(layout) { | |
569 assert(layout->tag() == DataLayout::jump_data_tag || | |
570 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
571 } | |
572 | |
573 virtual bool is_JumpData() { return true; } | |
574 | |
575 static int static_cell_count() { | |
576 return jump_cell_count; | |
577 } | |
578 | |
579 virtual int cell_count() { | |
580 return static_cell_count(); | |
581 } | |
582 | |
583 // Direct accessor | |
584 uint taken() { | |
585 return uint_at(taken_off_set); | |
586 } | |
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587 |
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588 void set_taken(uint cnt) { |
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589 set_uint_at(taken_off_set, cnt); |
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590 } |
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591 |
0 | 592 // Saturating counter |
593 uint inc_taken() { | |
594 uint cnt = taken() + 1; | |
595 // Did we wrap? Will compiler screw us?? | |
596 if (cnt == 0) cnt--; | |
597 set_uint_at(taken_off_set, cnt); | |
598 return cnt; | |
599 } | |
600 | |
601 int displacement() { | |
602 return int_at(displacement_off_set); | |
603 } | |
604 | |
605 // Code generation support | |
606 static ByteSize taken_offset() { | |
607 return cell_offset(taken_off_set); | |
608 } | |
609 | |
610 static ByteSize displacement_offset() { | |
611 return cell_offset(displacement_off_set); | |
612 } | |
613 | |
614 // Specific initialization. | |
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615 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 616 |
617 #ifndef PRODUCT | |
618 void print_data_on(outputStream* st); | |
619 #endif | |
620 }; | |
621 | |
622 // ReceiverTypeData | |
623 // | |
624 // A ReceiverTypeData is used to access profiling information about a | |
625 // dynamic type check. It consists of a counter which counts the total times | |
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626 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 627 // which are used to store a type profile for the receiver of the check. |
628 class ReceiverTypeData : public CounterData { | |
629 protected: | |
630 enum { | |
631 receiver0_offset = counter_cell_count, | |
632 count0_offset, | |
633 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
634 }; | |
635 | |
636 public: | |
637 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
638 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
639 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
640 } | |
641 | |
642 virtual bool is_ReceiverTypeData() { return true; } | |
643 | |
644 static int static_cell_count() { | |
645 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
646 } | |
647 | |
648 virtual int cell_count() { | |
649 return static_cell_count(); | |
650 } | |
651 | |
652 // Direct accessors | |
653 static uint row_limit() { | |
654 return TypeProfileWidth; | |
655 } | |
656 static int receiver_cell_index(uint row) { | |
657 return receiver0_offset + row * receiver_type_row_cell_count; | |
658 } | |
659 static int receiver_count_cell_index(uint row) { | |
660 return count0_offset + row * receiver_type_row_cell_count; | |
661 } | |
662 | |
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663 Klass* receiver(uint row) { |
0 | 664 assert(row < row_limit(), "oob"); |
665 | |
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666 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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667 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 668 return recv; |
669 } | |
670 | |
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671 void set_receiver(uint row, Klass* k) { |
941 | 672 assert((uint)row < row_limit(), "oob"); |
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673 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 674 } |
675 | |
0 | 676 uint receiver_count(uint row) { |
677 assert(row < row_limit(), "oob"); | |
678 return uint_at(receiver_count_cell_index(row)); | |
679 } | |
680 | |
941 | 681 void set_receiver_count(uint row, uint count) { |
682 assert(row < row_limit(), "oob"); | |
683 set_uint_at(receiver_count_cell_index(row), count); | |
684 } | |
685 | |
686 void clear_row(uint row) { | |
687 assert(row < row_limit(), "oob"); | |
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688 // Clear total count - indicator of polymorphic call site. |
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689 // The site may look like as monomorphic after that but |
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690 // it allow to have more accurate profiling information because |
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691 // there was execution phase change since klasses were unloaded. |
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692 // If the site is still polymorphic then MDO will be updated |
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693 // to reflect it. But it could be the case that the site becomes |
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694 // only bimorphic. Then keeping total count not 0 will be wrong. |
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695 // Even if we use monomorphic (when it is not) for compilation |
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696 // we will only have trap, deoptimization and recompile again |
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697 // with updated MDO after executing method in Interpreter. |
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698 // An additional receiver will be recorded in the cleaned row |
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699 // during next call execution. |
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700 // |
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701 // Note: our profiling logic works with empty rows in any slot. |
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702 // We do sorting a profiling info (ciCallProfile) for compilation. |
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703 // |
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704 set_count(0); |
941 | 705 set_receiver(row, NULL); |
706 set_receiver_count(row, 0); | |
707 } | |
708 | |
0 | 709 // Code generation support |
710 static ByteSize receiver_offset(uint row) { | |
711 return cell_offset(receiver_cell_index(row)); | |
712 } | |
713 static ByteSize receiver_count_offset(uint row) { | |
714 return cell_offset(receiver_count_cell_index(row)); | |
715 } | |
716 static ByteSize receiver_type_data_size() { | |
717 return cell_offset(static_cell_count()); | |
718 } | |
719 | |
720 // GC support | |
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721 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 722 |
723 #ifndef PRODUCT | |
724 void print_receiver_data_on(outputStream* st); | |
725 void print_data_on(outputStream* st); | |
726 #endif | |
727 }; | |
728 | |
729 // VirtualCallData | |
730 // | |
731 // A VirtualCallData is used to access profiling information about a | |
732 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
733 class VirtualCallData : public ReceiverTypeData { | |
734 public: | |
735 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
736 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
737 } | |
738 | |
739 virtual bool is_VirtualCallData() { return true; } | |
740 | |
741 static int static_cell_count() { | |
742 // At this point we could add more profile state, e.g., for arguments. | |
743 // But for now it's the same size as the base record type. | |
744 return ReceiverTypeData::static_cell_count(); | |
745 } | |
746 | |
747 virtual int cell_count() { | |
748 return static_cell_count(); | |
749 } | |
750 | |
751 // Direct accessors | |
752 static ByteSize virtual_call_data_size() { | |
753 return cell_offset(static_cell_count()); | |
754 } | |
755 | |
756 #ifndef PRODUCT | |
757 void print_data_on(outputStream* st); | |
758 #endif | |
759 }; | |
760 | |
761 // RetData | |
762 // | |
763 // A RetData is used to access profiling information for a ret bytecode. | |
764 // It is composed of a count of the number of times that the ret has | |
765 // been executed, followed by a series of triples of the form | |
766 // (bci, count, di) which count the number of times that some bci was the | |
767 // target of the ret and cache a corresponding data displacement. | |
768 class RetData : public CounterData { | |
769 protected: | |
770 enum { | |
771 bci0_offset = counter_cell_count, | |
772 count0_offset, | |
773 displacement0_offset, | |
774 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
775 }; | |
776 | |
777 void set_bci(uint row, int bci) { | |
778 assert((uint)row < row_limit(), "oob"); | |
779 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
780 } | |
781 void release_set_bci(uint row, int bci) { | |
782 assert((uint)row < row_limit(), "oob"); | |
783 // 'release' when setting the bci acts as a valid flag for other | |
784 // threads wrt bci_count and bci_displacement. | |
785 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
786 } | |
787 void set_bci_count(uint row, uint count) { | |
788 assert((uint)row < row_limit(), "oob"); | |
789 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
790 } | |
791 void set_bci_displacement(uint row, int disp) { | |
792 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
793 } | |
794 | |
795 public: | |
796 RetData(DataLayout* layout) : CounterData(layout) { | |
797 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
798 } | |
799 | |
800 virtual bool is_RetData() { return true; } | |
801 | |
802 enum { | |
803 no_bci = -1 // value of bci when bci1/2 are not in use. | |
804 }; | |
805 | |
806 static int static_cell_count() { | |
807 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
808 } | |
809 | |
810 virtual int cell_count() { | |
811 return static_cell_count(); | |
812 } | |
813 | |
814 static uint row_limit() { | |
815 return BciProfileWidth; | |
816 } | |
817 static int bci_cell_index(uint row) { | |
818 return bci0_offset + row * ret_row_cell_count; | |
819 } | |
820 static int bci_count_cell_index(uint row) { | |
821 return count0_offset + row * ret_row_cell_count; | |
822 } | |
823 static int bci_displacement_cell_index(uint row) { | |
824 return displacement0_offset + row * ret_row_cell_count; | |
825 } | |
826 | |
827 // Direct accessors | |
828 int bci(uint row) { | |
829 return int_at(bci_cell_index(row)); | |
830 } | |
831 uint bci_count(uint row) { | |
832 return uint_at(bci_count_cell_index(row)); | |
833 } | |
834 int bci_displacement(uint row) { | |
835 return int_at(bci_displacement_cell_index(row)); | |
836 } | |
837 | |
838 // Interpreter Runtime support | |
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839 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 840 |
841 // Code generation support | |
842 static ByteSize bci_offset(uint row) { | |
843 return cell_offset(bci_cell_index(row)); | |
844 } | |
845 static ByteSize bci_count_offset(uint row) { | |
846 return cell_offset(bci_count_cell_index(row)); | |
847 } | |
848 static ByteSize bci_displacement_offset(uint row) { | |
849 return cell_offset(bci_displacement_cell_index(row)); | |
850 } | |
851 | |
852 // Specific initialization. | |
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853 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 854 |
855 #ifndef PRODUCT | |
856 void print_data_on(outputStream* st); | |
857 #endif | |
858 }; | |
859 | |
860 // BranchData | |
861 // | |
862 // A BranchData is used to access profiling data for a two-way branch. | |
863 // It consists of taken and not_taken counts as well as a data displacement | |
864 // for the taken case. | |
865 class BranchData : public JumpData { | |
866 protected: | |
867 enum { | |
868 not_taken_off_set = jump_cell_count, | |
869 branch_cell_count | |
870 }; | |
871 | |
872 void set_displacement(int displacement) { | |
873 set_int_at(displacement_off_set, displacement); | |
874 } | |
875 | |
876 public: | |
877 BranchData(DataLayout* layout) : JumpData(layout) { | |
878 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
879 } | |
880 | |
881 virtual bool is_BranchData() { return true; } | |
882 | |
883 static int static_cell_count() { | |
884 return branch_cell_count; | |
885 } | |
886 | |
887 virtual int cell_count() { | |
888 return static_cell_count(); | |
889 } | |
890 | |
891 // Direct accessor | |
892 uint not_taken() { | |
893 return uint_at(not_taken_off_set); | |
894 } | |
895 | |
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896 void set_not_taken(uint cnt) { |
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897 set_uint_at(not_taken_off_set, cnt); |
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898 } |
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899 |
0 | 900 uint inc_not_taken() { |
901 uint cnt = not_taken() + 1; | |
902 // Did we wrap? Will compiler screw us?? | |
903 if (cnt == 0) cnt--; | |
904 set_uint_at(not_taken_off_set, cnt); | |
905 return cnt; | |
906 } | |
907 | |
908 // Code generation support | |
909 static ByteSize not_taken_offset() { | |
910 return cell_offset(not_taken_off_set); | |
911 } | |
912 static ByteSize branch_data_size() { | |
913 return cell_offset(branch_cell_count); | |
914 } | |
915 | |
916 // Specific initialization. | |
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917 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 918 |
919 #ifndef PRODUCT | |
920 void print_data_on(outputStream* st); | |
921 #endif | |
922 }; | |
923 | |
924 // ArrayData | |
925 // | |
926 // A ArrayData is a base class for accessing profiling data which does | |
927 // not have a statically known size. It consists of an array length | |
928 // and an array start. | |
929 class ArrayData : public ProfileData { | |
930 protected: | |
931 friend class DataLayout; | |
932 | |
933 enum { | |
934 array_len_off_set, | |
935 array_start_off_set | |
936 }; | |
937 | |
938 uint array_uint_at(int index) { | |
939 int aindex = index + array_start_off_set; | |
940 return uint_at(aindex); | |
941 } | |
942 int array_int_at(int index) { | |
943 int aindex = index + array_start_off_set; | |
944 return int_at(aindex); | |
945 } | |
946 oop array_oop_at(int index) { | |
947 int aindex = index + array_start_off_set; | |
948 return oop_at(aindex); | |
949 } | |
950 void array_set_int_at(int index, int value) { | |
951 int aindex = index + array_start_off_set; | |
952 set_int_at(aindex, value); | |
953 } | |
954 | |
955 // Code generation support for subclasses. | |
956 static ByteSize array_element_offset(int index) { | |
957 return cell_offset(array_start_off_set + index); | |
958 } | |
959 | |
960 public: | |
961 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
962 | |
963 virtual bool is_ArrayData() { return true; } | |
964 | |
965 static int static_cell_count() { | |
966 return -1; | |
967 } | |
968 | |
969 int array_len() { | |
970 return int_at_unchecked(array_len_off_set); | |
971 } | |
972 | |
973 virtual int cell_count() { | |
974 return array_len() + 1; | |
975 } | |
976 | |
977 // Code generation support | |
978 static ByteSize array_len_offset() { | |
979 return cell_offset(array_len_off_set); | |
980 } | |
981 static ByteSize array_start_offset() { | |
982 return cell_offset(array_start_off_set); | |
983 } | |
984 }; | |
985 | |
986 // MultiBranchData | |
987 // | |
988 // A MultiBranchData is used to access profiling information for | |
989 // a multi-way branch (*switch bytecodes). It consists of a series | |
990 // of (count, displacement) pairs, which count the number of times each | |
991 // case was taken and specify the data displacment for each branch target. | |
992 class MultiBranchData : public ArrayData { | |
993 protected: | |
994 enum { | |
995 default_count_off_set, | |
996 default_disaplacement_off_set, | |
997 case_array_start | |
998 }; | |
999 enum { | |
1000 relative_count_off_set, | |
1001 relative_displacement_off_set, | |
1002 per_case_cell_count | |
1003 }; | |
1004 | |
1005 void set_default_displacement(int displacement) { | |
1006 array_set_int_at(default_disaplacement_off_set, displacement); | |
1007 } | |
1008 void set_displacement_at(int index, int displacement) { | |
1009 array_set_int_at(case_array_start + | |
1010 index * per_case_cell_count + | |
1011 relative_displacement_off_set, | |
1012 displacement); | |
1013 } | |
1014 | |
1015 public: | |
1016 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1017 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1018 } | |
1019 | |
1020 virtual bool is_MultiBranchData() { return true; } | |
1021 | |
1022 static int compute_cell_count(BytecodeStream* stream); | |
1023 | |
1024 int number_of_cases() { | |
1025 int alen = array_len() - 2; // get rid of default case here. | |
1026 assert(alen % per_case_cell_count == 0, "must be even"); | |
1027 return (alen / per_case_cell_count); | |
1028 } | |
1029 | |
1030 uint default_count() { | |
1031 return array_uint_at(default_count_off_set); | |
1032 } | |
1033 int default_displacement() { | |
1034 return array_int_at(default_disaplacement_off_set); | |
1035 } | |
1036 | |
1037 uint count_at(int index) { | |
1038 return array_uint_at(case_array_start + | |
1039 index * per_case_cell_count + | |
1040 relative_count_off_set); | |
1041 } | |
1042 int displacement_at(int index) { | |
1043 return array_int_at(case_array_start + | |
1044 index * per_case_cell_count + | |
1045 relative_displacement_off_set); | |
1046 } | |
1047 | |
1048 // Code generation support | |
1049 static ByteSize default_count_offset() { | |
1050 return array_element_offset(default_count_off_set); | |
1051 } | |
1052 static ByteSize default_displacement_offset() { | |
1053 return array_element_offset(default_disaplacement_off_set); | |
1054 } | |
1055 static ByteSize case_count_offset(int index) { | |
1056 return case_array_offset() + | |
1057 (per_case_size() * index) + | |
1058 relative_count_offset(); | |
1059 } | |
1060 static ByteSize case_array_offset() { | |
1061 return array_element_offset(case_array_start); | |
1062 } | |
1063 static ByteSize per_case_size() { | |
1064 return in_ByteSize(per_case_cell_count) * cell_size; | |
1065 } | |
1066 static ByteSize relative_count_offset() { | |
1067 return in_ByteSize(relative_count_off_set) * cell_size; | |
1068 } | |
1069 static ByteSize relative_displacement_offset() { | |
1070 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1071 } | |
1072 | |
1073 // Specific initialization. | |
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1074 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1075 |
1076 #ifndef PRODUCT | |
1077 void print_data_on(outputStream* st); | |
1078 #endif | |
1079 }; | |
1080 | |
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1081 class ArgInfoData : public ArrayData { |
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1082 |
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1083 public: |
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1084 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1085 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1086 } |
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1087 |
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1088 virtual bool is_ArgInfoData() { return true; } |
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1089 |
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1090 |
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1091 int number_of_args() { |
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1092 return array_len(); |
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1093 } |
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1094 |
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1095 uint arg_modified(int arg) { |
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1096 return array_uint_at(arg); |
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1097 } |
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1098 |
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1099 void set_arg_modified(int arg, uint val) { |
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1100 array_set_int_at(arg, val); |
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1101 } |
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1102 |
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1103 #ifndef PRODUCT |
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1104 void print_data_on(outputStream* st); |
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1105 #endif |
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1106 }; |
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1107 |
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1108 // MethodData* |
0 | 1109 // |
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1110 // A MethodData* holds information which has been collected about |
0 | 1111 // a method. Its layout looks like this: |
1112 // | |
1113 // ----------------------------- | |
1114 // | header | | |
1115 // | klass | | |
1116 // ----------------------------- | |
1117 // | method | | |
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1118 // | size of the MethodData* | |
0 | 1119 // ----------------------------- |
1120 // | Data entries... | | |
1121 // | (variable size) | | |
1122 // | | | |
1123 // . . | |
1124 // . . | |
1125 // . . | |
1126 // | | | |
1127 // ----------------------------- | |
1128 // | |
1129 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1130 // DataLayout in the array corresponds to a specific bytecode in the | |
1131 // method. The entries in the array are sorted by the corresponding | |
1132 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1133 // which point to the underlying blocks of DataLayout structures. | |
1134 // | |
1135 // During interpretation, if profiling in enabled, the interpreter | |
1136 // maintains a method data pointer (mdp), which points at the entry | |
1137 // in the array corresponding to the current bci. In the course of | |
1138 // intepretation, when a bytecode is encountered that has profile data | |
1139 // associated with it, the entry pointed to by mdp is updated, then the | |
1140 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1141 // is NULL to begin with, the interpreter assumes that the current method | |
1142 // is not (yet) being profiled. | |
1143 // | |
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1144 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1145 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1146 // from the base of the data entry array. A "displacement" is the byte offset | |
1147 // in certain ProfileData objects that indicate the amount the mdp must be | |
1148 // adjusted in the event of a change in control flow. | |
1149 // | |
1150 | |
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1151 class MethodData : public Metadata { |
0 | 1152 friend class VMStructs; |
1153 private: | |
1154 friend class ProfileData; | |
1155 | |
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1156 // Back pointer to the Method* |
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1157 Method* _method; |
0 | 1158 |
1159 // Size of this oop in bytes | |
1160 int _size; | |
1161 | |
1162 // Cached hint for bci_to_dp and bci_to_data | |
1163 int _hint_di; | |
1164 | |
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1165 MethodData(methodHandle method, int size, TRAPS); |
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1166 public: |
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1167 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1168 MethodData() {}; // For ciMethodData |
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1169 |
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1170 bool is_methodData() const volatile { return true; } |
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1171 |
0 | 1172 // Whole-method sticky bits and flags |
1173 enum { | |
3345 | 1174 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1175 _trap_hist_mask = max_jubyte, |
1176 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1177 }; // Public flag values | |
1178 private: | |
1179 uint _nof_decompiles; // count of all nmethod removals | |
1180 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1181 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1182 union { | |
1183 intptr_t _align; | |
1184 u1 _array[_trap_hist_limit]; | |
1185 } _trap_hist; | |
1186 | |
1187 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1188 intx _eflags; // flags on escape information | |
1189 intx _arg_local; // bit set of non-escaping arguments | |
1190 intx _arg_stack; // bit set of stack-allocatable arguments | |
1191 intx _arg_returned; // bit set of returned arguments | |
1192 | |
1783 | 1193 int _creation_mileage; // method mileage at MDO creation |
1194 | |
1195 // How many invocations has this MDO seen? | |
1196 // These counters are used to determine the exact age of MDO. | |
1197 // We need those because in tiered a method can be concurrently | |
1198 // executed at different levels. | |
1199 InvocationCounter _invocation_counter; | |
1200 // Same for backedges. | |
1201 InvocationCounter _backedge_counter; | |
2252 | 1202 // Counter values at the time profiling started. |
1203 int _invocation_counter_start; | |
1204 int _backedge_counter_start; | |
1783 | 1205 // Number of loops and blocks is computed when compiling the first |
1206 // time with C1. It is used to determine if method is trivial. | |
1207 short _num_loops; | |
1208 short _num_blocks; | |
1209 // Highest compile level this method has ever seen. | |
1210 u1 _highest_comp_level; | |
1211 // Same for OSR level | |
1212 u1 _highest_osr_comp_level; | |
1213 // Does this method contain anything worth profiling? | |
1214 bool _would_profile; | |
0 | 1215 |
1216 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1217 int _data_size; | |
1218 | |
1219 // Beginning of the data entries | |
1220 intptr_t _data[1]; | |
1221 | |
1222 // Helper for size computation | |
1223 static int compute_data_size(BytecodeStream* stream); | |
1224 static int bytecode_cell_count(Bytecodes::Code code); | |
1225 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1226 | |
1227 // Helper for initialization | |
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1228 DataLayout* data_layout_at(int data_index) const { |
0 | 1229 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1230 return (DataLayout*) (((address)_data) + data_index); | |
1231 } | |
1232 | |
1233 // Initialize an individual data segment. Returns the size of | |
1234 // the segment in bytes. | |
1235 int initialize_data(BytecodeStream* stream, int data_index); | |
1236 | |
1237 // Helper for data_at | |
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1238 DataLayout* limit_data_position() const { |
0 | 1239 return (DataLayout*)((address)data_base() + _data_size); |
1240 } | |
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1241 bool out_of_bounds(int data_index) const { |
0 | 1242 return data_index >= data_size(); |
1243 } | |
1244 | |
1245 // Give each of the data entries a chance to perform specific | |
1246 // data initialization. | |
1247 void post_initialize(BytecodeStream* stream); | |
1248 | |
1249 // hint accessors | |
1250 int hint_di() const { return _hint_di; } | |
1251 void set_hint_di(int di) { | |
1252 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1253 _hint_di = di; | |
1254 } | |
1255 ProfileData* data_before(int bci) { | |
1256 // avoid SEGV on this edge case | |
1257 if (data_size() == 0) | |
1258 return NULL; | |
1259 int hint = hint_di(); | |
1260 if (data_layout_at(hint)->bci() <= bci) | |
1261 return data_at(hint); | |
1262 return first_data(); | |
1263 } | |
1264 | |
1265 // What is the index of the first data entry? | |
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1266 int first_di() const { return 0; } |
0 | 1267 |
1268 // Find or create an extra ProfileData: | |
1269 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1270 | |
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1271 // return the argument info cell |
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1272 ArgInfoData *arg_info(); |
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1273 |
0 | 1274 public: |
1275 static int header_size() { | |
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1276 return sizeof(MethodData)/wordSize; |
0 | 1277 } |
1278 | |
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1279 // Compute the size of a MethodData* before it is created. |
0 | 1280 static int compute_allocation_size_in_bytes(methodHandle method); |
1281 static int compute_allocation_size_in_words(methodHandle method); | |
1282 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1283 | |
1284 // Determine if a given bytecode can have profile information. | |
1285 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1286 return bytecode_cell_count(code) != no_profile_data; | |
1287 } | |
1288 | |
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1289 // reset into original state |
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1290 void init(); |
0 | 1291 |
1292 // My size | |
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1293 int size_in_bytes() const { return _size; } |
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1294 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1295 #if INCLUDE_SERVICES |
1296 void collect_statistics(KlassSizeStats *sz) const; | |
1297 #endif | |
0 | 1298 |
1299 int creation_mileage() const { return _creation_mileage; } | |
1300 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1301 |
1302 int invocation_count() { | |
1303 if (invocation_counter()->carry()) { | |
1304 return InvocationCounter::count_limit; | |
1305 } | |
1306 return invocation_counter()->count(); | |
1307 } | |
1308 int backedge_count() { | |
1309 if (backedge_counter()->carry()) { | |
1310 return InvocationCounter::count_limit; | |
1311 } | |
1312 return backedge_counter()->count(); | |
1313 } | |
1314 | |
2252 | 1315 int invocation_count_start() { |
1316 if (invocation_counter()->carry()) { | |
1317 return 0; | |
1318 } | |
1319 return _invocation_counter_start; | |
1320 } | |
1321 | |
1322 int backedge_count_start() { | |
1323 if (backedge_counter()->carry()) { | |
1324 return 0; | |
1325 } | |
1326 return _backedge_counter_start; | |
1327 } | |
1328 | |
1329 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1330 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1331 | |
1332 void reset_start_counters() { | |
1333 _invocation_counter_start = invocation_count(); | |
1334 _backedge_counter_start = backedge_count(); | |
1335 } | |
1336 | |
1783 | 1337 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1338 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1339 | |
1340 void set_would_profile(bool p) { _would_profile = p; } | |
1341 bool would_profile() const { return _would_profile; } | |
1342 | |
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1343 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 1344 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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1345 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 1346 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
1347 | |
1348 int num_loops() const { return _num_loops; } | |
1349 void set_num_loops(int n) { _num_loops = n; } | |
1350 int num_blocks() const { return _num_blocks; } | |
1351 void set_num_blocks(int n) { _num_blocks = n; } | |
1352 | |
0 | 1353 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1354 static int mileage_of(Method* m); |
0 | 1355 |
1356 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1357 enum EscapeFlag { | |
1358 estimated = 1 << 0, | |
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1359 return_local = 1 << 1, |
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1360 return_allocated = 1 << 2, |
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1361 allocated_escapes = 1 << 3, |
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1362 unknown_modified = 1 << 4 |
0 | 1363 }; |
1364 | |
1365 intx eflags() { return _eflags; } | |
1366 intx arg_local() { return _arg_local; } | |
1367 intx arg_stack() { return _arg_stack; } | |
1368 intx arg_returned() { return _arg_returned; } | |
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1369 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1370 assert(aid != NULL, "arg_info must be not null"); |
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1371 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1372 return aid->arg_modified(a); } |
0 | 1373 |
1374 void set_eflags(intx v) { _eflags = v; } | |
1375 void set_arg_local(intx v) { _arg_local = v; } | |
1376 void set_arg_stack(intx v) { _arg_stack = v; } | |
1377 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1378 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1379 assert(aid != NULL, "arg_info must be not null"); |
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1380 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1381 aid->set_arg_modified(a, v); } |
0 | 1382 |
1383 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1384 | |
1385 // Location and size of data area | |
1386 address data_base() const { | |
1387 return (address) _data; | |
1388 } | |
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1389 int data_size() const { |
0 | 1390 return _data_size; |
1391 } | |
1392 | |
1393 // Accessors | |
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1394 Method* method() const { return _method; } |
0 | 1395 |
1396 // Get the data at an arbitrary (sort of) data index. | |
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1397 ProfileData* data_at(int data_index) const; |
0 | 1398 |
1399 // Walk through the data in order. | |
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1400 ProfileData* first_data() const { return data_at(first_di()); } |
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1401 ProfileData* next_data(ProfileData* current) const; |
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1402 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 1403 |
1404 // Convert a dp (data pointer) to a di (data index). | |
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1405 int dp_to_di(address dp) const { |
0 | 1406 return dp - ((address)_data); |
1407 } | |
1408 | |
1409 address di_to_dp(int di) { | |
1410 return (address)data_layout_at(di); | |
1411 } | |
1412 | |
1413 // bci to di/dp conversion. | |
1414 address bci_to_dp(int bci); | |
1415 int bci_to_di(int bci) { | |
1416 return dp_to_di(bci_to_dp(bci)); | |
1417 } | |
1418 | |
1419 // Get the data at an arbitrary bci, or NULL if there is none. | |
1420 ProfileData* bci_to_data(int bci); | |
1421 | |
1422 // Same, but try to create an extra_data record if one is needed: | |
1423 ProfileData* allocate_bci_to_data(int bci) { | |
1424 ProfileData* data = bci_to_data(bci); | |
1425 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1426 } | |
1427 | |
1428 // Add a handful of extra data records, for trap tracking. | |
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1429 DataLayout* extra_data_base() const { return limit_data_position(); } |
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1430 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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1431 int extra_data_size() const { return (address)extra_data_limit() |
0 | 1432 - (address)extra_data_base(); } |
1433 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1434 | |
1435 // Return (uint)-1 for overflow. | |
1436 uint trap_count(int reason) const { | |
1437 assert((uint)reason < _trap_hist_limit, "oob"); | |
1438 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1439 } | |
1440 // For loops: | |
1441 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1442 static uint trap_count_limit() { return _trap_hist_mask; } | |
1443 uint inc_trap_count(int reason) { | |
1444 // Count another trap, anywhere in this method. | |
1445 assert(reason >= 0, "must be single trap"); | |
1446 if ((uint)reason < _trap_hist_limit) { | |
1447 uint cnt1 = 1 + _trap_hist._array[reason]; | |
1448 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
1449 _trap_hist._array[reason] = cnt1; | |
1450 return cnt1; | |
1451 } else { | |
1452 return _trap_hist_mask + (++_nof_overflow_traps); | |
1453 } | |
1454 } else { | |
1455 // Could not represent the count in the histogram. | |
1456 return (++_nof_overflow_traps); | |
1457 } | |
1458 } | |
1459 | |
1460 uint overflow_trap_count() const { | |
1461 return _nof_overflow_traps; | |
1462 } | |
1463 uint overflow_recompile_count() const { | |
1464 return _nof_overflow_recompiles; | |
1465 } | |
1466 void inc_overflow_recompile_count() { | |
1467 _nof_overflow_recompiles += 1; | |
1468 } | |
1469 uint decompile_count() const { | |
1470 return _nof_decompiles; | |
1471 } | |
1472 void inc_decompile_count() { | |
1473 _nof_decompiles += 1; | |
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1474 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 1475 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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1476 } |
0 | 1477 } |
1478 | |
1479 // Support for code generation | |
1480 static ByteSize data_offset() { | |
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1481 return byte_offset_of(MethodData, _data[0]); |
0 | 1482 } |
1483 | |
1783 | 1484 static ByteSize invocation_counter_offset() { |
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1485 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 1486 } |
1487 static ByteSize backedge_counter_offset() { | |
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1488 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 1489 } |
1490 | |
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1491 // Deallocation support - no pointer fields to deallocate |
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1492 void deallocate_contents(ClassLoaderData* loader_data) {} |
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1493 |
0 | 1494 // GC support |
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1495 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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1496 |
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1497 // Printing |
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1498 #ifndef PRODUCT |
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1499 void print_on (outputStream* st) const; |
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1500 #endif |
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1501 void print_value_on(outputStream* st) const; |
0 | 1502 |
1503 #ifndef PRODUCT | |
1504 // printing support for method data | |
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1505 void print_data_on(outputStream* st) const; |
0 | 1506 #endif |
1507 | |
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1508 const char* internal_name() const { return "{method data}"; } |
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1509 |
0 | 1510 // verification |
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1511 void verify_on(outputStream* st); |
0 | 1512 void verify_data_on(outputStream* st); |
1513 }; | |
1972 | 1514 |
1515 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |