Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 7555:9c6602e65423
Updated .hgignore file to also ignore IntelliJ project files.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 25 Jan 2013 11:11:32 +0100 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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; |
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 | |
202 void set_flag_at(int flag_number) { | |
203 assert(flag_number < flag_limit, "oob"); | |
204 _header._struct._flags |= (0x1 << flag_number); | |
205 } | |
206 bool flag_at(int flag_number) { | |
207 assert(flag_number < flag_limit, "oob"); | |
208 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
209 } | |
210 | |
211 // Low-level support for code generation. | |
212 static ByteSize header_offset() { | |
213 return byte_offset_of(DataLayout, _header); | |
214 } | |
215 static ByteSize tag_offset() { | |
216 return byte_offset_of(DataLayout, _header._struct._tag); | |
217 } | |
218 static ByteSize flags_offset() { | |
219 return byte_offset_of(DataLayout, _header._struct._flags); | |
220 } | |
221 static ByteSize bci_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._bci); | |
223 } | |
224 static ByteSize cell_offset(int index) { | |
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225 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 226 } |
227 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
228 static int flag_number_to_byte_constant(int flag_number) { | |
229 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
230 DataLayout temp; temp.set_header(0); | |
231 temp.set_flag_at(flag_number); | |
232 return temp._header._struct._flags; | |
233 } | |
234 // Return a value which, when or-ed as a word into _header, sets the flag. | |
235 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
236 DataLayout temp; temp.set_header(0); | |
237 temp._header._struct._flags = byte_constant; | |
238 return temp._header._bits; | |
239 } | |
941 | 240 |
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241 ProfileData* data_in(); |
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242 |
941 | 243 // GC support |
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244 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 245 }; |
246 | |
247 | |
248 // ProfileData class hierarchy | |
249 class ProfileData; | |
250 class BitData; | |
251 class CounterData; | |
252 class ReceiverTypeData; | |
253 class VirtualCallData; | |
254 class RetData; | |
255 class JumpData; | |
256 class BranchData; | |
257 class ArrayData; | |
258 class MultiBranchData; | |
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259 class ArgInfoData; |
0 | 260 |
261 | |
262 // ProfileData | |
263 // | |
264 // A ProfileData object is created to refer to a section of profiling | |
265 // data in a structured way. | |
266 class ProfileData : public ResourceObj { | |
267 private: | |
268 #ifndef PRODUCT | |
269 enum { | |
270 tab_width_one = 16, | |
271 tab_width_two = 36 | |
272 }; | |
273 #endif // !PRODUCT | |
274 | |
275 // This is a pointer to a section of profiling data. | |
276 DataLayout* _data; | |
277 | |
278 protected: | |
279 DataLayout* data() { return _data; } | |
280 | |
281 enum { | |
282 cell_size = DataLayout::cell_size | |
283 }; | |
284 | |
285 public: | |
286 // How many cells are in this? | |
287 virtual int cell_count() { | |
288 ShouldNotReachHere(); | |
289 return -1; | |
290 } | |
291 | |
292 // Return the size of this data. | |
293 int size_in_bytes() { | |
294 return DataLayout::compute_size_in_bytes(cell_count()); | |
295 } | |
296 | |
297 protected: | |
298 // Low-level accessors for underlying data | |
299 void set_intptr_at(int index, intptr_t value) { | |
300 assert(0 <= index && index < cell_count(), "oob"); | |
301 data()->set_cell_at(index, value); | |
302 } | |
303 void release_set_intptr_at(int index, intptr_t value) { | |
304 assert(0 <= index && index < cell_count(), "oob"); | |
305 data()->release_set_cell_at(index, value); | |
306 } | |
307 intptr_t intptr_at(int index) { | |
308 assert(0 <= index && index < cell_count(), "oob"); | |
309 return data()->cell_at(index); | |
310 } | |
311 void set_uint_at(int index, uint value) { | |
312 set_intptr_at(index, (intptr_t) value); | |
313 } | |
314 void release_set_uint_at(int index, uint value) { | |
315 release_set_intptr_at(index, (intptr_t) value); | |
316 } | |
317 uint uint_at(int index) { | |
318 return (uint)intptr_at(index); | |
319 } | |
320 void set_int_at(int index, int value) { | |
321 set_intptr_at(index, (intptr_t) value); | |
322 } | |
323 void release_set_int_at(int index, int value) { | |
324 release_set_intptr_at(index, (intptr_t) value); | |
325 } | |
326 int int_at(int index) { | |
327 return (int)intptr_at(index); | |
328 } | |
329 int int_at_unchecked(int index) { | |
330 return (int)data()->cell_at(index); | |
331 } | |
332 void set_oop_at(int index, oop value) { | |
333 set_intptr_at(index, (intptr_t) value); | |
334 } | |
335 oop oop_at(int index) { | |
336 return (oop)intptr_at(index); | |
337 } | |
338 | |
339 void set_flag_at(int flag_number) { | |
340 data()->set_flag_at(flag_number); | |
341 } | |
342 bool flag_at(int flag_number) { | |
343 return data()->flag_at(flag_number); | |
344 } | |
345 | |
346 // two convenient imports for use by subclasses: | |
347 static ByteSize cell_offset(int index) { | |
348 return DataLayout::cell_offset(index); | |
349 } | |
350 static int flag_number_to_byte_constant(int flag_number) { | |
351 return DataLayout::flag_number_to_byte_constant(flag_number); | |
352 } | |
353 | |
354 ProfileData(DataLayout* data) { | |
355 _data = data; | |
356 } | |
357 | |
358 public: | |
359 // Constructor for invalid ProfileData. | |
360 ProfileData(); | |
361 | |
362 u2 bci() { | |
363 return data()->bci(); | |
364 } | |
365 | |
366 address dp() { | |
367 return (address)_data; | |
368 } | |
369 | |
370 int trap_state() { | |
371 return data()->trap_state(); | |
372 } | |
373 void set_trap_state(int new_state) { | |
374 data()->set_trap_state(new_state); | |
375 } | |
376 | |
377 // Type checking | |
378 virtual bool is_BitData() { return false; } | |
379 virtual bool is_CounterData() { return false; } | |
380 virtual bool is_JumpData() { return false; } | |
381 virtual bool is_ReceiverTypeData(){ return false; } | |
382 virtual bool is_VirtualCallData() { return false; } | |
383 virtual bool is_RetData() { return false; } | |
384 virtual bool is_BranchData() { return false; } | |
385 virtual bool is_ArrayData() { return false; } | |
386 virtual bool is_MultiBranchData() { return false; } | |
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387 virtual bool is_ArgInfoData() { return false; } |
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388 |
0 | 389 |
390 BitData* as_BitData() { | |
391 assert(is_BitData(), "wrong type"); | |
392 return is_BitData() ? (BitData*) this : NULL; | |
393 } | |
394 CounterData* as_CounterData() { | |
395 assert(is_CounterData(), "wrong type"); | |
396 return is_CounterData() ? (CounterData*) this : NULL; | |
397 } | |
398 JumpData* as_JumpData() { | |
399 assert(is_JumpData(), "wrong type"); | |
400 return is_JumpData() ? (JumpData*) this : NULL; | |
401 } | |
402 ReceiverTypeData* as_ReceiverTypeData() { | |
403 assert(is_ReceiverTypeData(), "wrong type"); | |
404 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
405 } | |
406 VirtualCallData* as_VirtualCallData() { | |
407 assert(is_VirtualCallData(), "wrong type"); | |
408 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
409 } | |
410 RetData* as_RetData() { | |
411 assert(is_RetData(), "wrong type"); | |
412 return is_RetData() ? (RetData*) this : NULL; | |
413 } | |
414 BranchData* as_BranchData() { | |
415 assert(is_BranchData(), "wrong type"); | |
416 return is_BranchData() ? (BranchData*) this : NULL; | |
417 } | |
418 ArrayData* as_ArrayData() { | |
419 assert(is_ArrayData(), "wrong type"); | |
420 return is_ArrayData() ? (ArrayData*) this : NULL; | |
421 } | |
422 MultiBranchData* as_MultiBranchData() { | |
423 assert(is_MultiBranchData(), "wrong type"); | |
424 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
425 } | |
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426 ArgInfoData* as_ArgInfoData() { |
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427 assert(is_ArgInfoData(), "wrong type"); |
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428 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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429 } |
0 | 430 |
431 | |
432 // Subclass specific initialization | |
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433 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 434 |
435 // GC support | |
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436 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 437 |
438 // CI translation: ProfileData can represent both MethodDataOop data | |
439 // as well as CIMethodData data. This function is provided for translating | |
440 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
441 // most ProfileData don't require any translation, so we provide the null | |
442 // translation here, and the required translators are in the ci subclasses. | |
443 virtual void translate_from(ProfileData* data) {} | |
444 | |
445 virtual void print_data_on(outputStream* st) { | |
446 ShouldNotReachHere(); | |
447 } | |
448 | |
449 #ifndef PRODUCT | |
450 void print_shared(outputStream* st, const char* name); | |
451 void tab(outputStream* st); | |
452 #endif | |
453 }; | |
454 | |
455 // BitData | |
456 // | |
457 // A BitData holds a flag or two in its header. | |
458 class BitData : public ProfileData { | |
459 protected: | |
460 enum { | |
461 // null_seen: | |
462 // saw a null operand (cast/aastore/instanceof) | |
463 null_seen_flag = DataLayout::first_flag + 0 | |
464 }; | |
465 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
466 public: | |
467 BitData(DataLayout* layout) : ProfileData(layout) { | |
468 } | |
469 | |
470 virtual bool is_BitData() { return true; } | |
471 | |
472 static int static_cell_count() { | |
473 return bit_cell_count; | |
474 } | |
475 | |
476 virtual int cell_count() { | |
477 return static_cell_count(); | |
478 } | |
479 | |
480 // Accessor | |
481 | |
482 // The null_seen flag bit is specially known to the interpreter. | |
483 // Consulting it allows the compiler to avoid setting up null_check traps. | |
484 bool null_seen() { return flag_at(null_seen_flag); } | |
485 void set_null_seen() { set_flag_at(null_seen_flag); } | |
486 | |
487 | |
488 // Code generation support | |
489 static int null_seen_byte_constant() { | |
490 return flag_number_to_byte_constant(null_seen_flag); | |
491 } | |
492 | |
493 static ByteSize bit_data_size() { | |
494 return cell_offset(bit_cell_count); | |
495 } | |
496 | |
497 #ifndef PRODUCT | |
498 void print_data_on(outputStream* st); | |
499 #endif | |
500 }; | |
501 | |
502 // CounterData | |
503 // | |
504 // A CounterData corresponds to a simple counter. | |
505 class CounterData : public BitData { | |
506 protected: | |
507 enum { | |
508 count_off, | |
509 counter_cell_count | |
510 }; | |
511 public: | |
512 CounterData(DataLayout* layout) : BitData(layout) {} | |
513 | |
514 virtual bool is_CounterData() { return true; } | |
515 | |
516 static int static_cell_count() { | |
517 return counter_cell_count; | |
518 } | |
519 | |
520 virtual int cell_count() { | |
521 return static_cell_count(); | |
522 } | |
523 | |
524 // Direct accessor | |
525 uint count() { | |
526 return uint_at(count_off); | |
527 } | |
528 | |
529 // Code generation support | |
530 static ByteSize count_offset() { | |
531 return cell_offset(count_off); | |
532 } | |
533 static ByteSize counter_data_size() { | |
534 return cell_offset(counter_cell_count); | |
535 } | |
536 | |
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537 void set_count(uint count) { |
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538 set_uint_at(count_off, count); |
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539 } |
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540 |
0 | 541 #ifndef PRODUCT |
542 void print_data_on(outputStream* st); | |
543 #endif | |
544 }; | |
545 | |
546 // JumpData | |
547 // | |
548 // A JumpData is used to access profiling information for a direct | |
549 // branch. It is a counter, used for counting the number of branches, | |
550 // plus a data displacement, used for realigning the data pointer to | |
551 // the corresponding target bci. | |
552 class JumpData : public ProfileData { | |
553 protected: | |
554 enum { | |
555 taken_off_set, | |
556 displacement_off_set, | |
557 jump_cell_count | |
558 }; | |
559 | |
560 void set_displacement(int displacement) { | |
561 set_int_at(displacement_off_set, displacement); | |
562 } | |
563 | |
564 public: | |
565 JumpData(DataLayout* layout) : ProfileData(layout) { | |
566 assert(layout->tag() == DataLayout::jump_data_tag || | |
567 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
568 } | |
569 | |
570 virtual bool is_JumpData() { return true; } | |
571 | |
572 static int static_cell_count() { | |
573 return jump_cell_count; | |
574 } | |
575 | |
576 virtual int cell_count() { | |
577 return static_cell_count(); | |
578 } | |
579 | |
580 // Direct accessor | |
581 uint taken() { | |
582 return uint_at(taken_off_set); | |
583 } | |
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584 |
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585 void set_taken(uint cnt) { |
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586 set_uint_at(taken_off_set, cnt); |
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587 } |
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588 |
0 | 589 // Saturating counter |
590 uint inc_taken() { | |
591 uint cnt = taken() + 1; | |
592 // Did we wrap? Will compiler screw us?? | |
593 if (cnt == 0) cnt--; | |
594 set_uint_at(taken_off_set, cnt); | |
595 return cnt; | |
596 } | |
597 | |
598 int displacement() { | |
599 return int_at(displacement_off_set); | |
600 } | |
601 | |
602 // Code generation support | |
603 static ByteSize taken_offset() { | |
604 return cell_offset(taken_off_set); | |
605 } | |
606 | |
607 static ByteSize displacement_offset() { | |
608 return cell_offset(displacement_off_set); | |
609 } | |
610 | |
611 // Specific initialization. | |
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612 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 613 |
614 #ifndef PRODUCT | |
615 void print_data_on(outputStream* st); | |
616 #endif | |
617 }; | |
618 | |
619 // ReceiverTypeData | |
620 // | |
621 // A ReceiverTypeData is used to access profiling information about a | |
622 // dynamic type check. It consists of a counter which counts the total times | |
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623 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 624 // which are used to store a type profile for the receiver of the check. |
625 class ReceiverTypeData : public CounterData { | |
626 protected: | |
627 enum { | |
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628 #ifdef GRAAL |
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629 // Graal is interested in knowing the percentage of type checks |
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630 // involving a type not explicitly in the profile |
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631 nonprofiled_receiver_count_off_set = counter_cell_count, |
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632 receiver0_offset, |
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633 #else |
0 | 634 receiver0_offset = counter_cell_count, |
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635 #endif |
0 | 636 count0_offset, |
637 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
638 }; | |
639 | |
640 public: | |
641 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
642 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
643 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
644 } | |
645 | |
646 virtual bool is_ReceiverTypeData() { return true; } | |
647 | |
648 static int static_cell_count() { | |
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649 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
0 | 650 } |
651 | |
652 virtual int cell_count() { | |
653 return static_cell_count(); | |
654 } | |
655 | |
656 // Direct accessors | |
657 static uint row_limit() { | |
658 return TypeProfileWidth; | |
659 } | |
660 static int receiver_cell_index(uint row) { | |
661 return receiver0_offset + row * receiver_type_row_cell_count; | |
662 } | |
663 static int receiver_count_cell_index(uint row) { | |
664 return count0_offset + row * receiver_type_row_cell_count; | |
665 } | |
666 | |
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667 Klass* receiver(uint row) { |
0 | 668 assert(row < row_limit(), "oob"); |
669 | |
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670 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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671 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 672 return recv; |
673 } | |
674 | |
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675 void set_receiver(uint row, Klass* k) { |
941 | 676 assert((uint)row < row_limit(), "oob"); |
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677 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 678 } |
679 | |
0 | 680 uint receiver_count(uint row) { |
681 assert(row < row_limit(), "oob"); | |
682 return uint_at(receiver_count_cell_index(row)); | |
683 } | |
684 | |
941 | 685 void set_receiver_count(uint row, uint count) { |
686 assert(row < row_limit(), "oob"); | |
687 set_uint_at(receiver_count_cell_index(row), count); | |
688 } | |
689 | |
690 void clear_row(uint row) { | |
691 assert(row < row_limit(), "oob"); | |
1251
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692 // Clear total count - indicator of polymorphic call site. |
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693 // The site may look like as monomorphic after that but |
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694 // it allow to have more accurate profiling information because |
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695 // there was execution phase change since klasses were unloaded. |
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696 // If the site is still polymorphic then MDO will be updated |
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697 // to reflect it. But it could be the case that the site becomes |
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698 // only bimorphic. Then keeping total count not 0 will be wrong. |
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699 // Even if we use monomorphic (when it is not) for compilation |
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700 // we will only have trap, deoptimization and recompile again |
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701 // with updated MDO after executing method in Interpreter. |
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702 // An additional receiver will be recorded in the cleaned row |
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703 // during next call execution. |
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704 // |
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705 // Note: our profiling logic works with empty rows in any slot. |
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706 // We do sorting a profiling info (ciCallProfile) for compilation. |
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707 // |
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708 set_count(0); |
941 | 709 set_receiver(row, NULL); |
710 set_receiver_count(row, 0); | |
711 } | |
712 | |
0 | 713 // Code generation support |
714 static ByteSize receiver_offset(uint row) { | |
715 return cell_offset(receiver_cell_index(row)); | |
716 } | |
717 static ByteSize receiver_count_offset(uint row) { | |
718 return cell_offset(receiver_count_cell_index(row)); | |
719 } | |
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720 #ifdef GRAAL |
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721 static ByteSize nonprofiled_receiver_count_offset() { |
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722 return cell_offset(nonprofiled_receiver_count_off_set); |
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723 } |
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724 #endif |
0 | 725 static ByteSize receiver_type_data_size() { |
726 return cell_offset(static_cell_count()); | |
727 } | |
728 | |
729 // GC support | |
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730 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 731 |
732 #ifndef PRODUCT | |
733 void print_receiver_data_on(outputStream* st); | |
734 void print_data_on(outputStream* st); | |
735 #endif | |
736 }; | |
737 | |
738 // VirtualCallData | |
739 // | |
740 // A VirtualCallData is used to access profiling information about a | |
741 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
742 class VirtualCallData : public ReceiverTypeData { | |
743 public: | |
744 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
745 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
746 } | |
747 | |
748 virtual bool is_VirtualCallData() { return true; } | |
749 | |
750 static int static_cell_count() { | |
751 // At this point we could add more profile state, e.g., for arguments. | |
752 // But for now it's the same size as the base record type. | |
753 return ReceiverTypeData::static_cell_count(); | |
754 } | |
755 | |
756 virtual int cell_count() { | |
757 return static_cell_count(); | |
758 } | |
759 | |
760 // Direct accessors | |
761 static ByteSize virtual_call_data_size() { | |
762 return cell_offset(static_cell_count()); | |
763 } | |
764 | |
765 #ifndef PRODUCT | |
766 void print_data_on(outputStream* st); | |
767 #endif | |
768 }; | |
769 | |
770 // RetData | |
771 // | |
772 // A RetData is used to access profiling information for a ret bytecode. | |
773 // It is composed of a count of the number of times that the ret has | |
774 // been executed, followed by a series of triples of the form | |
775 // (bci, count, di) which count the number of times that some bci was the | |
776 // target of the ret and cache a corresponding data displacement. | |
777 class RetData : public CounterData { | |
778 protected: | |
779 enum { | |
780 bci0_offset = counter_cell_count, | |
781 count0_offset, | |
782 displacement0_offset, | |
783 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
784 }; | |
785 | |
786 void set_bci(uint row, int bci) { | |
787 assert((uint)row < row_limit(), "oob"); | |
788 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
789 } | |
790 void release_set_bci(uint row, int bci) { | |
791 assert((uint)row < row_limit(), "oob"); | |
792 // 'release' when setting the bci acts as a valid flag for other | |
793 // threads wrt bci_count and bci_displacement. | |
794 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
795 } | |
796 void set_bci_count(uint row, uint count) { | |
797 assert((uint)row < row_limit(), "oob"); | |
798 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
799 } | |
800 void set_bci_displacement(uint row, int disp) { | |
801 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
802 } | |
803 | |
804 public: | |
805 RetData(DataLayout* layout) : CounterData(layout) { | |
806 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
807 } | |
808 | |
809 virtual bool is_RetData() { return true; } | |
810 | |
811 enum { | |
812 no_bci = -1 // value of bci when bci1/2 are not in use. | |
813 }; | |
814 | |
815 static int static_cell_count() { | |
816 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
817 } | |
818 | |
819 virtual int cell_count() { | |
820 return static_cell_count(); | |
821 } | |
822 | |
823 static uint row_limit() { | |
824 return BciProfileWidth; | |
825 } | |
826 static int bci_cell_index(uint row) { | |
827 return bci0_offset + row * ret_row_cell_count; | |
828 } | |
829 static int bci_count_cell_index(uint row) { | |
830 return count0_offset + row * ret_row_cell_count; | |
831 } | |
832 static int bci_displacement_cell_index(uint row) { | |
833 return displacement0_offset + row * ret_row_cell_count; | |
834 } | |
835 | |
836 // Direct accessors | |
837 int bci(uint row) { | |
838 return int_at(bci_cell_index(row)); | |
839 } | |
840 uint bci_count(uint row) { | |
841 return uint_at(bci_count_cell_index(row)); | |
842 } | |
843 int bci_displacement(uint row) { | |
844 return int_at(bci_displacement_cell_index(row)); | |
845 } | |
846 | |
847 // Interpreter Runtime support | |
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848 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 849 |
850 // Code generation support | |
851 static ByteSize bci_offset(uint row) { | |
852 return cell_offset(bci_cell_index(row)); | |
853 } | |
854 static ByteSize bci_count_offset(uint row) { | |
855 return cell_offset(bci_count_cell_index(row)); | |
856 } | |
857 static ByteSize bci_displacement_offset(uint row) { | |
858 return cell_offset(bci_displacement_cell_index(row)); | |
859 } | |
860 | |
861 // Specific initialization. | |
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862 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 863 |
864 #ifndef PRODUCT | |
865 void print_data_on(outputStream* st); | |
866 #endif | |
867 }; | |
868 | |
869 // BranchData | |
870 // | |
871 // A BranchData is used to access profiling data for a two-way branch. | |
872 // It consists of taken and not_taken counts as well as a data displacement | |
873 // for the taken case. | |
874 class BranchData : public JumpData { | |
875 protected: | |
876 enum { | |
877 not_taken_off_set = jump_cell_count, | |
878 branch_cell_count | |
879 }; | |
880 | |
881 void set_displacement(int displacement) { | |
882 set_int_at(displacement_off_set, displacement); | |
883 } | |
884 | |
885 public: | |
886 BranchData(DataLayout* layout) : JumpData(layout) { | |
887 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
888 } | |
889 | |
890 virtual bool is_BranchData() { return true; } | |
891 | |
892 static int static_cell_count() { | |
893 return branch_cell_count; | |
894 } | |
895 | |
896 virtual int cell_count() { | |
897 return static_cell_count(); | |
898 } | |
899 | |
900 // Direct accessor | |
901 uint not_taken() { | |
902 return uint_at(not_taken_off_set); | |
903 } | |
904 | |
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905 void set_not_taken(uint cnt) { |
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906 set_uint_at(not_taken_off_set, cnt); |
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907 } |
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908 |
0 | 909 uint inc_not_taken() { |
910 uint cnt = not_taken() + 1; | |
911 // Did we wrap? Will compiler screw us?? | |
912 if (cnt == 0) cnt--; | |
913 set_uint_at(not_taken_off_set, cnt); | |
914 return cnt; | |
915 } | |
916 | |
917 // Code generation support | |
918 static ByteSize not_taken_offset() { | |
919 return cell_offset(not_taken_off_set); | |
920 } | |
921 static ByteSize branch_data_size() { | |
922 return cell_offset(branch_cell_count); | |
923 } | |
924 | |
925 // Specific initialization. | |
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926 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 927 |
928 #ifndef PRODUCT | |
929 void print_data_on(outputStream* st); | |
930 #endif | |
931 }; | |
932 | |
933 // ArrayData | |
934 // | |
935 // A ArrayData is a base class for accessing profiling data which does | |
936 // not have a statically known size. It consists of an array length | |
937 // and an array start. | |
938 class ArrayData : public ProfileData { | |
939 protected: | |
940 friend class DataLayout; | |
941 | |
942 enum { | |
943 array_len_off_set, | |
944 array_start_off_set | |
945 }; | |
946 | |
947 uint array_uint_at(int index) { | |
948 int aindex = index + array_start_off_set; | |
949 return uint_at(aindex); | |
950 } | |
951 int array_int_at(int index) { | |
952 int aindex = index + array_start_off_set; | |
953 return int_at(aindex); | |
954 } | |
955 oop array_oop_at(int index) { | |
956 int aindex = index + array_start_off_set; | |
957 return oop_at(aindex); | |
958 } | |
959 void array_set_int_at(int index, int value) { | |
960 int aindex = index + array_start_off_set; | |
961 set_int_at(aindex, value); | |
962 } | |
963 | |
964 // Code generation support for subclasses. | |
965 static ByteSize array_element_offset(int index) { | |
966 return cell_offset(array_start_off_set + index); | |
967 } | |
968 | |
969 public: | |
970 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
971 | |
972 virtual bool is_ArrayData() { return true; } | |
973 | |
974 static int static_cell_count() { | |
975 return -1; | |
976 } | |
977 | |
978 int array_len() { | |
979 return int_at_unchecked(array_len_off_set); | |
980 } | |
981 | |
982 virtual int cell_count() { | |
983 return array_len() + 1; | |
984 } | |
985 | |
986 // Code generation support | |
987 static ByteSize array_len_offset() { | |
988 return cell_offset(array_len_off_set); | |
989 } | |
990 static ByteSize array_start_offset() { | |
991 return cell_offset(array_start_off_set); | |
992 } | |
993 }; | |
994 | |
995 // MultiBranchData | |
996 // | |
997 // A MultiBranchData is used to access profiling information for | |
998 // a multi-way branch (*switch bytecodes). It consists of a series | |
999 // of (count, displacement) pairs, which count the number of times each | |
1000 // case was taken and specify the data displacment for each branch target. | |
1001 class MultiBranchData : public ArrayData { | |
1002 protected: | |
1003 enum { | |
1004 default_count_off_set, | |
1005 default_disaplacement_off_set, | |
1006 case_array_start | |
1007 }; | |
1008 enum { | |
1009 relative_count_off_set, | |
1010 relative_displacement_off_set, | |
1011 per_case_cell_count | |
1012 }; | |
1013 | |
1014 void set_default_displacement(int displacement) { | |
1015 array_set_int_at(default_disaplacement_off_set, displacement); | |
1016 } | |
1017 void set_displacement_at(int index, int displacement) { | |
1018 array_set_int_at(case_array_start + | |
1019 index * per_case_cell_count + | |
1020 relative_displacement_off_set, | |
1021 displacement); | |
1022 } | |
1023 | |
1024 public: | |
1025 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1026 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1027 } | |
1028 | |
1029 virtual bool is_MultiBranchData() { return true; } | |
1030 | |
1031 static int compute_cell_count(BytecodeStream* stream); | |
1032 | |
1033 int number_of_cases() { | |
1034 int alen = array_len() - 2; // get rid of default case here. | |
1035 assert(alen % per_case_cell_count == 0, "must be even"); | |
1036 return (alen / per_case_cell_count); | |
1037 } | |
1038 | |
1039 uint default_count() { | |
1040 return array_uint_at(default_count_off_set); | |
1041 } | |
1042 int default_displacement() { | |
1043 return array_int_at(default_disaplacement_off_set); | |
1044 } | |
1045 | |
1046 uint count_at(int index) { | |
1047 return array_uint_at(case_array_start + | |
1048 index * per_case_cell_count + | |
1049 relative_count_off_set); | |
1050 } | |
1051 int displacement_at(int index) { | |
1052 return array_int_at(case_array_start + | |
1053 index * per_case_cell_count + | |
1054 relative_displacement_off_set); | |
1055 } | |
1056 | |
1057 // Code generation support | |
1058 static ByteSize default_count_offset() { | |
1059 return array_element_offset(default_count_off_set); | |
1060 } | |
1061 static ByteSize default_displacement_offset() { | |
1062 return array_element_offset(default_disaplacement_off_set); | |
1063 } | |
1064 static ByteSize case_count_offset(int index) { | |
1065 return case_array_offset() + | |
1066 (per_case_size() * index) + | |
1067 relative_count_offset(); | |
1068 } | |
1069 static ByteSize case_array_offset() { | |
1070 return array_element_offset(case_array_start); | |
1071 } | |
1072 static ByteSize per_case_size() { | |
1073 return in_ByteSize(per_case_cell_count) * cell_size; | |
1074 } | |
1075 static ByteSize relative_count_offset() { | |
1076 return in_ByteSize(relative_count_off_set) * cell_size; | |
1077 } | |
1078 static ByteSize relative_displacement_offset() { | |
1079 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1080 } | |
1081 | |
1082 // Specific initialization. | |
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1083 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1084 |
1085 #ifndef PRODUCT | |
1086 void print_data_on(outputStream* st); | |
1087 #endif | |
1088 }; | |
1089 | |
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1090 class ArgInfoData : public ArrayData { |
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1091 |
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1092 public: |
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1093 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1094 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1095 } |
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1096 |
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1097 virtual bool is_ArgInfoData() { return true; } |
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1098 |
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1099 |
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1100 int number_of_args() { |
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1101 return array_len(); |
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1102 } |
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1103 |
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1104 uint arg_modified(int arg) { |
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1105 return array_uint_at(arg); |
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1106 } |
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1107 |
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1108 void set_arg_modified(int arg, uint val) { |
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1109 array_set_int_at(arg, val); |
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1110 } |
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1111 |
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1112 #ifndef PRODUCT |
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1113 void print_data_on(outputStream* st); |
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1114 #endif |
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1115 }; |
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1116 |
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1117 // MethodData* |
0 | 1118 // |
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1119 // A MethodData* holds information which has been collected about |
0 | 1120 // a method. Its layout looks like this: |
1121 // | |
1122 // ----------------------------- | |
1123 // | header | | |
1124 // | klass | | |
1125 // ----------------------------- | |
1126 // | method | | |
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1127 // | size of the MethodData* | |
0 | 1128 // ----------------------------- |
1129 // | Data entries... | | |
1130 // | (variable size) | | |
1131 // | | | |
1132 // . . | |
1133 // . . | |
1134 // . . | |
1135 // | | | |
1136 // ----------------------------- | |
1137 // | |
1138 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1139 // DataLayout in the array corresponds to a specific bytecode in the | |
1140 // method. The entries in the array are sorted by the corresponding | |
1141 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1142 // which point to the underlying blocks of DataLayout structures. | |
1143 // | |
1144 // During interpretation, if profiling in enabled, the interpreter | |
1145 // maintains a method data pointer (mdp), which points at the entry | |
1146 // in the array corresponding to the current bci. In the course of | |
1147 // intepretation, when a bytecode is encountered that has profile data | |
1148 // associated with it, the entry pointed to by mdp is updated, then the | |
1149 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1150 // is NULL to begin with, the interpreter assumes that the current method | |
1151 // is not (yet) being profiled. | |
1152 // | |
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1153 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1154 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1155 // from the base of the data entry array. A "displacement" is the byte offset | |
1156 // in certain ProfileData objects that indicate the amount the mdp must be | |
1157 // adjusted in the event of a change in control flow. | |
1158 // | |
1159 | |
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1160 class MethodData : public Metadata { |
0 | 1161 friend class VMStructs; |
1162 private: | |
1163 friend class ProfileData; | |
1164 | |
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1165 // Back pointer to the Method* |
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1166 Method* _method; |
0 | 1167 |
1168 // Size of this oop in bytes | |
1169 int _size; | |
1170 | |
1171 // Cached hint for bci_to_dp and bci_to_data | |
1172 int _hint_di; | |
1173 | |
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1174 MethodData(methodHandle method, int size, TRAPS); |
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1175 public: |
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1176 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1177 MethodData() {}; // For ciMethodData |
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1178 |
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1179 bool is_methodData() const volatile { return true; } |
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1180 |
0 | 1181 // Whole-method sticky bits and flags |
1182 enum { | |
3345 | 1183 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1184 _trap_hist_mask = max_jubyte, |
1185 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1186 }; // Public flag values | |
1187 private: | |
1188 uint _nof_decompiles; // count of all nmethod removals | |
1189 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1190 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1191 union { | |
1192 intptr_t _align; | |
1193 u1 _array[_trap_hist_limit]; | |
1194 } _trap_hist; | |
1195 | |
1196 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1197 intx _eflags; // flags on escape information | |
1198 intx _arg_local; // bit set of non-escaping arguments | |
1199 intx _arg_stack; // bit set of stack-allocatable arguments | |
1200 intx _arg_returned; // bit set of returned arguments | |
1201 | |
1783 | 1202 int _creation_mileage; // method mileage at MDO creation |
1203 | |
1204 // How many invocations has this MDO seen? | |
1205 // These counters are used to determine the exact age of MDO. | |
1206 // We need those because in tiered a method can be concurrently | |
1207 // executed at different levels. | |
1208 InvocationCounter _invocation_counter; | |
1209 // Same for backedges. | |
1210 InvocationCounter _backedge_counter; | |
2252 | 1211 // Counter values at the time profiling started. |
1212 int _invocation_counter_start; | |
1213 int _backedge_counter_start; | |
1783 | 1214 // Number of loops and blocks is computed when compiling the first |
1215 // time with C1. It is used to determine if method is trivial. | |
1216 short _num_loops; | |
1217 short _num_blocks; | |
1218 // Highest compile level this method has ever seen. | |
1219 u1 _highest_comp_level; | |
1220 // Same for OSR level | |
1221 u1 _highest_osr_comp_level; | |
1222 // Does this method contain anything worth profiling? | |
1223 bool _would_profile; | |
0 | 1224 |
1225 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1226 int _data_size; | |
1227 | |
1228 // Beginning of the data entries | |
1229 intptr_t _data[1]; | |
1230 | |
1231 // Helper for size computation | |
1232 static int compute_data_size(BytecodeStream* stream); | |
1233 static int bytecode_cell_count(Bytecodes::Code code); | |
1234 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1235 | |
1236 // Helper for initialization | |
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1237 DataLayout* data_layout_at(int data_index) const { |
0 | 1238 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1239 return (DataLayout*) (((address)_data) + data_index); | |
1240 } | |
1241 | |
1242 // Initialize an individual data segment. Returns the size of | |
1243 // the segment in bytes. | |
1244 int initialize_data(BytecodeStream* stream, int data_index); | |
1245 | |
1246 // Helper for data_at | |
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1247 DataLayout* limit_data_position() const { |
0 | 1248 return (DataLayout*)((address)data_base() + _data_size); |
1249 } | |
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1250 bool out_of_bounds(int data_index) const { |
0 | 1251 return data_index >= data_size(); |
1252 } | |
1253 | |
1254 // Give each of the data entries a chance to perform specific | |
1255 // data initialization. | |
1256 void post_initialize(BytecodeStream* stream); | |
1257 | |
1258 // hint accessors | |
1259 int hint_di() const { return _hint_di; } | |
1260 void set_hint_di(int di) { | |
1261 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1262 _hint_di = di; | |
1263 } | |
1264 ProfileData* data_before(int bci) { | |
1265 // avoid SEGV on this edge case | |
1266 if (data_size() == 0) | |
1267 return NULL; | |
1268 int hint = hint_di(); | |
1269 if (data_layout_at(hint)->bci() <= bci) | |
1270 return data_at(hint); | |
1271 return first_data(); | |
1272 } | |
1273 | |
1274 // What is the index of the first data entry? | |
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1275 int first_di() const { return 0; } |
0 | 1276 |
1277 // Find or create an extra ProfileData: | |
1278 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1279 | |
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1280 // return the argument info cell |
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1281 ArgInfoData *arg_info(); |
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1282 |
0 | 1283 public: |
1284 static int header_size() { | |
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1285 return sizeof(MethodData)/wordSize; |
0 | 1286 } |
1287 | |
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1288 // Compute the size of a MethodData* before it is created. |
0 | 1289 static int compute_allocation_size_in_bytes(methodHandle method); |
1290 static int compute_allocation_size_in_words(methodHandle method); | |
1291 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1292 | |
1293 // Determine if a given bytecode can have profile information. | |
1294 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1295 return bytecode_cell_count(code) != no_profile_data; | |
1296 } | |
1297 | |
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1298 // Perform initialization of a new MethodData* |
0 | 1299 void initialize(methodHandle method); |
1300 | |
1301 // My size | |
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1302 int size_in_bytes() const { return _size; } |
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1303 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
0 | 1304 |
1305 int creation_mileage() const { return _creation_mileage; } | |
1306 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1307 |
1308 int invocation_count() { | |
1309 if (invocation_counter()->carry()) { | |
1310 return InvocationCounter::count_limit; | |
1311 } | |
1312 return invocation_counter()->count(); | |
1313 } | |
1314 int backedge_count() { | |
1315 if (backedge_counter()->carry()) { | |
1316 return InvocationCounter::count_limit; | |
1317 } | |
1318 return backedge_counter()->count(); | |
1319 } | |
1320 | |
2252 | 1321 int invocation_count_start() { |
1322 if (invocation_counter()->carry()) { | |
1323 return 0; | |
1324 } | |
1325 return _invocation_counter_start; | |
1326 } | |
1327 | |
1328 int backedge_count_start() { | |
1329 if (backedge_counter()->carry()) { | |
1330 return 0; | |
1331 } | |
1332 return _backedge_counter_start; | |
1333 } | |
1334 | |
1335 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1336 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1337 | |
1338 void reset_start_counters() { | |
1339 _invocation_counter_start = invocation_count(); | |
1340 _backedge_counter_start = backedge_count(); | |
1341 } | |
1342 | |
1783 | 1343 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1344 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1345 | |
1346 void set_would_profile(bool p) { _would_profile = p; } | |
1347 bool would_profile() const { return _would_profile; } | |
1348 | |
1349 int highest_comp_level() { return _highest_comp_level; } | |
1350 void set_highest_comp_level(int level) { _highest_comp_level = level; } | |
1351 int highest_osr_comp_level() { return _highest_osr_comp_level; } | |
1352 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } | |
1353 | |
1354 int num_loops() const { return _num_loops; } | |
1355 void set_num_loops(int n) { _num_loops = n; } | |
1356 int num_blocks() const { return _num_blocks; } | |
1357 void set_num_blocks(int n) { _num_blocks = n; } | |
1358 | |
0 | 1359 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1360 static int mileage_of(Method* m); |
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1361 static bool is_empty_data(int size, Bytecodes::Code code); |
0 | 1362 |
1363 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1364 enum EscapeFlag { | |
1365 estimated = 1 << 0, | |
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1366 return_local = 1 << 1, |
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1367 return_allocated = 1 << 2, |
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1368 allocated_escapes = 1 << 3, |
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1369 unknown_modified = 1 << 4 |
0 | 1370 }; |
1371 | |
1372 intx eflags() { return _eflags; } | |
1373 intx arg_local() { return _arg_local; } | |
1374 intx arg_stack() { return _arg_stack; } | |
1375 intx arg_returned() { return _arg_returned; } | |
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1376 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1377 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1378 return aid->arg_modified(a); } |
0 | 1379 |
1380 void set_eflags(intx v) { _eflags = v; } | |
1381 void set_arg_local(intx v) { _arg_local = v; } | |
1382 void set_arg_stack(intx v) { _arg_stack = v; } | |
1383 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1384 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1385 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1386 |
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1387 aid->set_arg_modified(a, v); } |
0 | 1388 |
1389 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1390 | |
1391 // Location and size of data area | |
1392 address data_base() const { | |
1393 return (address) _data; | |
1394 } | |
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1395 int data_size() const { |
0 | 1396 return _data_size; |
1397 } | |
1398 | |
1399 // Accessors | |
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1400 Method* method() const { return _method; } |
0 | 1401 |
1402 // Get the data at an arbitrary (sort of) data index. | |
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1403 ProfileData* data_at(int data_index) const; |
0 | 1404 |
1405 // Walk through the data in order. | |
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1406 ProfileData* first_data() const { return data_at(first_di()); } |
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1407 ProfileData* next_data(ProfileData* current) const; |
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1408 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 1409 |
1410 // Convert a dp (data pointer) to a di (data index). | |
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1411 int dp_to_di(address dp) const { |
0 | 1412 return dp - ((address)_data); |
1413 } | |
1414 | |
1415 address di_to_dp(int di) { | |
1416 return (address)data_layout_at(di); | |
1417 } | |
1418 | |
1419 // bci to di/dp conversion. | |
1420 address bci_to_dp(int bci); | |
1421 int bci_to_di(int bci) { | |
1422 return dp_to_di(bci_to_dp(bci)); | |
1423 } | |
1424 | |
1425 // Get the data at an arbitrary bci, or NULL if there is none. | |
1426 ProfileData* bci_to_data(int bci); | |
1427 | |
1428 // Same, but try to create an extra_data record if one is needed: | |
1429 ProfileData* allocate_bci_to_data(int bci) { | |
1430 ProfileData* data = bci_to_data(bci); | |
1431 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1432 } | |
1433 | |
1434 // Add a handful of extra data records, for trap tracking. | |
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1435 DataLayout* extra_data_base() const { return limit_data_position(); } |
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1436 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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1437 int extra_data_size() const { return (address)extra_data_limit() |
0 | 1438 - (address)extra_data_base(); } |
1439 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1440 | |
1441 // Return (uint)-1 for overflow. | |
1442 uint trap_count(int reason) const { | |
1443 assert((uint)reason < _trap_hist_limit, "oob"); | |
1444 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1445 } | |
1446 // For loops: | |
1447 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1448 static uint trap_count_limit() { return _trap_hist_mask; } | |
1449 uint inc_trap_count(int reason) { | |
1450 // Count another trap, anywhere in this method. | |
1451 assert(reason >= 0, "must be single trap"); | |
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1452 assert((uint)reason < _trap_hist_limit, "oob"); |
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1453 uint cnt1 = 1 + _trap_hist._array[reason]; |
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1454 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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1455 _trap_hist._array[reason] = cnt1; |
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1456 return cnt1; |
0 | 1457 } else { |
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1458 return _trap_hist_mask + (++_nof_overflow_traps); |
0 | 1459 } |
1460 } | |
1461 | |
1462 uint overflow_trap_count() const { | |
1463 return _nof_overflow_traps; | |
1464 } | |
1465 uint overflow_recompile_count() const { | |
1466 return _nof_overflow_recompiles; | |
1467 } | |
1468 void inc_overflow_recompile_count() { | |
1469 _nof_overflow_recompiles += 1; | |
1470 } | |
1471 uint decompile_count() const { | |
1472 return _nof_decompiles; | |
1473 } | |
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1474 void inc_decompile_count(); |
0 | 1475 |
1476 // Support for code generation | |
1477 static ByteSize data_offset() { | |
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1478 return byte_offset_of(MethodData, _data[0]); |
0 | 1479 } |
1480 | |
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1481 static ByteSize trap_history_offset() { |
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1482 return byte_offset_of(MethodData, _trap_hist._array); |
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1483 } |
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1484 |
1783 | 1485 static ByteSize invocation_counter_offset() { |
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1486 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 1487 } |
1488 static ByteSize backedge_counter_offset() { | |
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1489 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 1490 } |
1491 | |
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1492 // Deallocation support - no pointer fields to deallocate |
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1493 void deallocate_contents(ClassLoaderData* loader_data) {} |
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1494 |
0 | 1495 // GC support |
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1496 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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1497 |
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1498 // Printing |
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1499 #ifndef PRODUCT |
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1500 void print_on (outputStream* st) const; |
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1501 #endif |
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1502 void print_value_on(outputStream* st) const; |
0 | 1503 |
1504 #ifndef PRODUCT | |
1505 // printing support for method data | |
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1506 void print_data_on(outputStream* st) const; |
0 | 1507 #endif |
1508 | |
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1509 const char* internal_name() const { return "{method data}"; } |
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1510 |
0 | 1511 // verification |
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1512 void verify_on(outputStream* st); |
0 | 1513 void verify_data_on(outputStream* st); |
1514 }; | |
1972 | 1515 |
1516 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |