Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 9808:12fdb8fe0a35
turn assertions in NodeClass.FieldScanner into guarantees
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 17 May 2013 15:41:39 +0200 |
parents | 89e4d67fdd2a |
children | c76b43ed5089 |
rev | line source |
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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 { | |
75 private: | |
76 // Every data layout begins with a header. This header | |
77 // contains a tag, which is used to indicate the size/layout | |
78 // of the data, 4 bits of flags, which can be used in any way, | |
79 // 4 bits of trap history (none/one reason/many reasons), | |
80 // and a bci, which is used to tie this piece of data to a | |
81 // specific bci in the bytecodes. | |
82 union { | |
83 intptr_t _bits; | |
84 struct { | |
85 u1 _tag; | |
86 u1 _flags; | |
87 u2 _bci; | |
88 } _struct; | |
89 } _header; | |
90 | |
91 // The data layout has an arbitrary number of cells, each sized | |
92 // to accomodate a pointer or an integer. | |
93 intptr_t _cells[1]; | |
94 | |
95 // Some types of data layouts need a length field. | |
96 static bool needs_array_len(u1 tag); | |
97 | |
98 public: | |
99 enum { | |
100 counter_increment = 1 | |
101 }; | |
102 | |
103 enum { | |
104 cell_size = sizeof(intptr_t) | |
105 }; | |
106 | |
107 // Tag values | |
108 enum { | |
109 no_tag, | |
110 bit_data_tag, | |
111 counter_data_tag, | |
112 jump_data_tag, | |
113 receiver_type_data_tag, | |
114 virtual_call_data_tag, | |
115 ret_data_tag, | |
116 branch_data_tag, | |
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117 multi_branch_data_tag, |
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118 arg_info_data_tag |
0 | 119 }; |
120 | |
121 enum { | |
122 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
123 // The trap state breaks down further as [recompile:1 | reason:3]. | |
124 // This further breakdown is defined in deoptimization.cpp. | |
125 // See Deoptimization::trap_state_reason for an assert that | |
126 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
127 // | |
128 // The trap_state is collected only if ProfileTraps is true. | |
129 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
130 trap_shift = BitsPerByte - trap_bits, | |
131 trap_mask = right_n_bits(trap_bits), | |
132 trap_mask_in_place = (trap_mask << trap_shift), | |
133 flag_limit = trap_shift, | |
134 flag_mask = right_n_bits(flag_limit), | |
135 first_flag = 0 | |
136 }; | |
137 | |
138 // Size computation | |
139 static int header_size_in_bytes() { | |
140 return cell_size; | |
141 } | |
142 static int header_size_in_cells() { | |
143 return 1; | |
144 } | |
145 | |
146 static int compute_size_in_bytes(int cell_count) { | |
147 return header_size_in_bytes() + cell_count * cell_size; | |
148 } | |
149 | |
150 // Initialization | |
151 void initialize(u1 tag, u2 bci, int cell_count); | |
152 | |
153 // Accessors | |
154 u1 tag() { | |
155 return _header._struct._tag; | |
156 } | |
157 | |
158 // Return a few bits of trap state. Range is [0..trap_mask]. | |
159 // The state tells if traps with zero, one, or many reasons have occurred. | |
160 // It also tells whether zero or many recompilations have occurred. | |
161 // The associated trap histogram in the MDO itself tells whether | |
162 // traps are common or not. If a BCI shows that a trap X has | |
163 // occurred, and the MDO shows N occurrences of X, we make the | |
164 // simplifying assumption that all N occurrences can be blamed | |
165 // on that BCI. | |
166 int trap_state() { | |
167 return ((_header._struct._flags >> trap_shift) & trap_mask); | |
168 } | |
169 | |
170 void set_trap_state(int new_state) { | |
171 assert(ProfileTraps, "used only under +ProfileTraps"); | |
172 uint old_flags = (_header._struct._flags & flag_mask); | |
173 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
174 } | |
175 | |
176 u1 flags() { | |
177 return _header._struct._flags; | |
178 } | |
179 | |
180 u2 bci() { | |
181 return _header._struct._bci; | |
182 } | |
183 | |
184 void set_header(intptr_t value) { | |
185 _header._bits = value; | |
186 } | |
187 void release_set_header(intptr_t value) { | |
188 OrderAccess::release_store_ptr(&_header._bits, value); | |
189 } | |
190 intptr_t header() { | |
191 return _header._bits; | |
192 } | |
193 void set_cell_at(int index, intptr_t value) { | |
194 _cells[index] = value; | |
195 } | |
196 void release_set_cell_at(int index, intptr_t value) { | |
197 OrderAccess::release_store_ptr(&_cells[index], value); | |
198 } | |
199 intptr_t cell_at(int index) { | |
200 return _cells[index]; | |
201 } | |
202 | |
203 void set_flag_at(int flag_number) { | |
204 assert(flag_number < flag_limit, "oob"); | |
205 _header._struct._flags |= (0x1 << flag_number); | |
206 } | |
207 bool flag_at(int flag_number) { | |
208 assert(flag_number < flag_limit, "oob"); | |
209 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
210 } | |
211 | |
212 // Low-level support for code generation. | |
213 static ByteSize header_offset() { | |
214 return byte_offset_of(DataLayout, _header); | |
215 } | |
216 static ByteSize tag_offset() { | |
217 return byte_offset_of(DataLayout, _header._struct._tag); | |
218 } | |
219 static ByteSize flags_offset() { | |
220 return byte_offset_of(DataLayout, _header._struct._flags); | |
221 } | |
222 static ByteSize bci_offset() { | |
223 return byte_offset_of(DataLayout, _header._struct._bci); | |
224 } | |
225 static ByteSize cell_offset(int index) { | |
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226 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 227 } |
228 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
229 static int flag_number_to_byte_constant(int flag_number) { | |
230 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
231 DataLayout temp; temp.set_header(0); | |
232 temp.set_flag_at(flag_number); | |
233 return temp._header._struct._flags; | |
234 } | |
235 // Return a value which, when or-ed as a word into _header, sets the flag. | |
236 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
237 DataLayout temp; temp.set_header(0); | |
238 temp._header._struct._flags = byte_constant; | |
239 return temp._header._bits; | |
240 } | |
941 | 241 |
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242 ProfileData* data_in(); |
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243 |
941 | 244 // GC support |
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245 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 246 }; |
247 | |
248 | |
249 // ProfileData class hierarchy | |
250 class ProfileData; | |
251 class BitData; | |
252 class CounterData; | |
253 class ReceiverTypeData; | |
254 class VirtualCallData; | |
255 class RetData; | |
256 class JumpData; | |
257 class BranchData; | |
258 class ArrayData; | |
259 class MultiBranchData; | |
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260 class ArgInfoData; |
0 | 261 |
262 | |
263 // ProfileData | |
264 // | |
265 // A ProfileData object is created to refer to a section of profiling | |
266 // data in a structured way. | |
267 class ProfileData : public ResourceObj { | |
268 private: | |
269 #ifndef PRODUCT | |
270 enum { | |
271 tab_width_one = 16, | |
272 tab_width_two = 36 | |
273 }; | |
274 #endif // !PRODUCT | |
275 | |
276 // This is a pointer to a section of profiling data. | |
277 DataLayout* _data; | |
278 | |
279 protected: | |
280 DataLayout* data() { return _data; } | |
281 | |
282 enum { | |
283 cell_size = DataLayout::cell_size | |
284 }; | |
285 | |
286 public: | |
287 // How many cells are in this? | |
288 virtual int cell_count() { | |
289 ShouldNotReachHere(); | |
290 return -1; | |
291 } | |
292 | |
293 // Return the size of this data. | |
294 int size_in_bytes() { | |
295 return DataLayout::compute_size_in_bytes(cell_count()); | |
296 } | |
297 | |
298 protected: | |
299 // Low-level accessors for underlying data | |
300 void set_intptr_at(int index, intptr_t value) { | |
301 assert(0 <= index && index < cell_count(), "oob"); | |
302 data()->set_cell_at(index, value); | |
303 } | |
304 void release_set_intptr_at(int index, intptr_t value) { | |
305 assert(0 <= index && index < cell_count(), "oob"); | |
306 data()->release_set_cell_at(index, value); | |
307 } | |
308 intptr_t intptr_at(int index) { | |
309 assert(0 <= index && index < cell_count(), "oob"); | |
310 return data()->cell_at(index); | |
311 } | |
312 void set_uint_at(int index, uint value) { | |
313 set_intptr_at(index, (intptr_t) value); | |
314 } | |
315 void release_set_uint_at(int index, uint value) { | |
316 release_set_intptr_at(index, (intptr_t) value); | |
317 } | |
318 uint uint_at(int index) { | |
319 return (uint)intptr_at(index); | |
320 } | |
321 void set_int_at(int index, int value) { | |
322 set_intptr_at(index, (intptr_t) value); | |
323 } | |
324 void release_set_int_at(int index, int value) { | |
325 release_set_intptr_at(index, (intptr_t) value); | |
326 } | |
327 int int_at(int index) { | |
328 return (int)intptr_at(index); | |
329 } | |
330 int int_at_unchecked(int index) { | |
331 return (int)data()->cell_at(index); | |
332 } | |
333 void set_oop_at(int index, oop value) { | |
334 set_intptr_at(index, (intptr_t) value); | |
335 } | |
336 oop oop_at(int index) { | |
337 return (oop)intptr_at(index); | |
338 } | |
339 | |
340 void set_flag_at(int flag_number) { | |
341 data()->set_flag_at(flag_number); | |
342 } | |
343 bool flag_at(int flag_number) { | |
344 return data()->flag_at(flag_number); | |
345 } | |
346 | |
347 // two convenient imports for use by subclasses: | |
348 static ByteSize cell_offset(int index) { | |
349 return DataLayout::cell_offset(index); | |
350 } | |
351 static int flag_number_to_byte_constant(int flag_number) { | |
352 return DataLayout::flag_number_to_byte_constant(flag_number); | |
353 } | |
354 | |
355 ProfileData(DataLayout* data) { | |
356 _data = data; | |
357 } | |
358 | |
359 public: | |
360 // Constructor for invalid ProfileData. | |
361 ProfileData(); | |
362 | |
363 u2 bci() { | |
364 return data()->bci(); | |
365 } | |
366 | |
367 address dp() { | |
368 return (address)_data; | |
369 } | |
370 | |
371 int trap_state() { | |
372 return data()->trap_state(); | |
373 } | |
374 void set_trap_state(int new_state) { | |
375 data()->set_trap_state(new_state); | |
376 } | |
377 | |
378 // Type checking | |
379 virtual bool is_BitData() { return false; } | |
380 virtual bool is_CounterData() { return false; } | |
381 virtual bool is_JumpData() { return false; } | |
382 virtual bool is_ReceiverTypeData(){ return false; } | |
383 virtual bool is_VirtualCallData() { return false; } | |
384 virtual bool is_RetData() { return false; } | |
385 virtual bool is_BranchData() { return false; } | |
386 virtual bool is_ArrayData() { return false; } | |
387 virtual bool is_MultiBranchData() { return false; } | |
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388 virtual bool is_ArgInfoData() { return false; } |
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389 |
0 | 390 |
391 BitData* as_BitData() { | |
392 assert(is_BitData(), "wrong type"); | |
393 return is_BitData() ? (BitData*) this : NULL; | |
394 } | |
395 CounterData* as_CounterData() { | |
396 assert(is_CounterData(), "wrong type"); | |
397 return is_CounterData() ? (CounterData*) this : NULL; | |
398 } | |
399 JumpData* as_JumpData() { | |
400 assert(is_JumpData(), "wrong type"); | |
401 return is_JumpData() ? (JumpData*) this : NULL; | |
402 } | |
403 ReceiverTypeData* as_ReceiverTypeData() { | |
404 assert(is_ReceiverTypeData(), "wrong type"); | |
405 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
406 } | |
407 VirtualCallData* as_VirtualCallData() { | |
408 assert(is_VirtualCallData(), "wrong type"); | |
409 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
410 } | |
411 RetData* as_RetData() { | |
412 assert(is_RetData(), "wrong type"); | |
413 return is_RetData() ? (RetData*) this : NULL; | |
414 } | |
415 BranchData* as_BranchData() { | |
416 assert(is_BranchData(), "wrong type"); | |
417 return is_BranchData() ? (BranchData*) this : NULL; | |
418 } | |
419 ArrayData* as_ArrayData() { | |
420 assert(is_ArrayData(), "wrong type"); | |
421 return is_ArrayData() ? (ArrayData*) this : NULL; | |
422 } | |
423 MultiBranchData* as_MultiBranchData() { | |
424 assert(is_MultiBranchData(), "wrong type"); | |
425 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
426 } | |
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427 ArgInfoData* as_ArgInfoData() { |
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428 assert(is_ArgInfoData(), "wrong type"); |
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429 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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430 } |
0 | 431 |
432 | |
433 // Subclass specific initialization | |
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434 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 435 |
436 // GC support | |
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437 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 438 |
439 // CI translation: ProfileData can represent both MethodDataOop data | |
440 // as well as CIMethodData data. This function is provided for translating | |
441 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
442 // most ProfileData don't require any translation, so we provide the null | |
443 // translation here, and the required translators are in the ci subclasses. | |
444 virtual void translate_from(ProfileData* data) {} | |
445 | |
446 virtual void print_data_on(outputStream* st) { | |
447 ShouldNotReachHere(); | |
448 } | |
449 | |
450 #ifndef PRODUCT | |
451 void print_shared(outputStream* st, const char* name); | |
452 void tab(outputStream* st); | |
453 #endif | |
454 }; | |
455 | |
456 // BitData | |
457 // | |
458 // A BitData holds a flag or two in its header. | |
459 class BitData : public ProfileData { | |
460 protected: | |
461 enum { | |
462 // null_seen: | |
463 // saw a null operand (cast/aastore/instanceof) | |
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464 null_seen_flag = DataLayout::first_flag + 0 |
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465 #ifdef GRAAL |
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466 // bytecode threw any exception |
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467 , exception_seen_flag = null_seen_flag + 1 |
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468 #endif |
0 | 469 }; |
470 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
471 public: | |
472 BitData(DataLayout* layout) : ProfileData(layout) { | |
473 } | |
474 | |
475 virtual bool is_BitData() { return true; } | |
476 | |
477 static int static_cell_count() { | |
478 return bit_cell_count; | |
479 } | |
480 | |
481 virtual int cell_count() { | |
482 return static_cell_count(); | |
483 } | |
484 | |
485 // Accessor | |
486 | |
487 // The null_seen flag bit is specially known to the interpreter. | |
488 // Consulting it allows the compiler to avoid setting up null_check traps. | |
489 bool null_seen() { return flag_at(null_seen_flag); } | |
490 void set_null_seen() { set_flag_at(null_seen_flag); } | |
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491 #ifdef GRAAL |
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492 // true if an exception was thrown at the specific BCI |
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493 bool exception_seen() { return flag_at(exception_seen_flag); } |
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494 void set_exception_seen() { set_flag_at(exception_seen_flag); } |
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495 #endif |
0 | 496 |
497 // Code generation support | |
498 static int null_seen_byte_constant() { | |
499 return flag_number_to_byte_constant(null_seen_flag); | |
500 } | |
501 | |
502 static ByteSize bit_data_size() { | |
503 return cell_offset(bit_cell_count); | |
504 } | |
505 | |
506 #ifndef PRODUCT | |
507 void print_data_on(outputStream* st); | |
508 #endif | |
509 }; | |
510 | |
511 // CounterData | |
512 // | |
513 // A CounterData corresponds to a simple counter. | |
514 class CounterData : public BitData { | |
515 protected: | |
516 enum { | |
517 count_off, | |
518 counter_cell_count | |
519 }; | |
520 public: | |
521 CounterData(DataLayout* layout) : BitData(layout) {} | |
522 | |
523 virtual bool is_CounterData() { return true; } | |
524 | |
525 static int static_cell_count() { | |
526 return counter_cell_count; | |
527 } | |
528 | |
529 virtual int cell_count() { | |
530 return static_cell_count(); | |
531 } | |
532 | |
533 // Direct accessor | |
534 uint count() { | |
535 return uint_at(count_off); | |
536 } | |
537 | |
538 // Code generation support | |
539 static ByteSize count_offset() { | |
540 return cell_offset(count_off); | |
541 } | |
542 static ByteSize counter_data_size() { | |
543 return cell_offset(counter_cell_count); | |
544 } | |
545 | |
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546 void set_count(uint count) { |
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547 set_uint_at(count_off, count); |
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548 } |
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549 |
0 | 550 #ifndef PRODUCT |
551 void print_data_on(outputStream* st); | |
552 #endif | |
553 }; | |
554 | |
555 // JumpData | |
556 // | |
557 // A JumpData is used to access profiling information for a direct | |
558 // branch. It is a counter, used for counting the number of branches, | |
559 // plus a data displacement, used for realigning the data pointer to | |
560 // the corresponding target bci. | |
561 class JumpData : public ProfileData { | |
562 protected: | |
563 enum { | |
564 taken_off_set, | |
565 displacement_off_set, | |
566 jump_cell_count | |
567 }; | |
568 | |
569 void set_displacement(int displacement) { | |
570 set_int_at(displacement_off_set, displacement); | |
571 } | |
572 | |
573 public: | |
574 JumpData(DataLayout* layout) : ProfileData(layout) { | |
575 assert(layout->tag() == DataLayout::jump_data_tag || | |
576 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
577 } | |
578 | |
579 virtual bool is_JumpData() { return true; } | |
580 | |
581 static int static_cell_count() { | |
582 return jump_cell_count; | |
583 } | |
584 | |
585 virtual int cell_count() { | |
586 return static_cell_count(); | |
587 } | |
588 | |
589 // Direct accessor | |
590 uint taken() { | |
591 return uint_at(taken_off_set); | |
592 } | |
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593 |
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594 void set_taken(uint cnt) { |
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595 set_uint_at(taken_off_set, cnt); |
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596 } |
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597 |
0 | 598 // Saturating counter |
599 uint inc_taken() { | |
600 uint cnt = taken() + 1; | |
601 // Did we wrap? Will compiler screw us?? | |
602 if (cnt == 0) cnt--; | |
603 set_uint_at(taken_off_set, cnt); | |
604 return cnt; | |
605 } | |
606 | |
607 int displacement() { | |
608 return int_at(displacement_off_set); | |
609 } | |
610 | |
611 // Code generation support | |
612 static ByteSize taken_offset() { | |
613 return cell_offset(taken_off_set); | |
614 } | |
615 | |
616 static ByteSize displacement_offset() { | |
617 return cell_offset(displacement_off_set); | |
618 } | |
619 | |
620 // Specific initialization. | |
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621 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 622 |
623 #ifndef PRODUCT | |
624 void print_data_on(outputStream* st); | |
625 #endif | |
626 }; | |
627 | |
628 // ReceiverTypeData | |
629 // | |
630 // A ReceiverTypeData is used to access profiling information about a | |
631 // dynamic type check. It consists of a counter which counts the total times | |
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632 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 633 // which are used to store a type profile for the receiver of the check. |
634 class ReceiverTypeData : public CounterData { | |
635 protected: | |
636 enum { | |
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637 #ifdef GRAAL |
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638 // Graal is interested in knowing the percentage of type checks |
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639 // involving a type not explicitly in the profile |
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640 nonprofiled_receiver_count_off_set = counter_cell_count, |
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641 receiver0_offset, |
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642 #else |
0 | 643 receiver0_offset = counter_cell_count, |
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644 #endif |
0 | 645 count0_offset, |
646 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
647 }; | |
648 | |
649 public: | |
650 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
651 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
652 layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
653 } | |
654 | |
655 virtual bool is_ReceiverTypeData() { return true; } | |
656 | |
657 static int static_cell_count() { | |
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658 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
0 | 659 } |
660 | |
661 virtual int cell_count() { | |
662 return static_cell_count(); | |
663 } | |
664 | |
665 // Direct accessors | |
666 static uint row_limit() { | |
667 return TypeProfileWidth; | |
668 } | |
669 static int receiver_cell_index(uint row) { | |
670 return receiver0_offset + row * receiver_type_row_cell_count; | |
671 } | |
672 static int receiver_count_cell_index(uint row) { | |
673 return count0_offset + row * receiver_type_row_cell_count; | |
674 } | |
675 | |
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676 Klass* receiver(uint row) { |
0 | 677 assert(row < row_limit(), "oob"); |
678 | |
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679 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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680 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 681 return recv; |
682 } | |
683 | |
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684 void set_receiver(uint row, Klass* k) { |
941 | 685 assert((uint)row < row_limit(), "oob"); |
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686 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 687 } |
688 | |
0 | 689 uint receiver_count(uint row) { |
690 assert(row < row_limit(), "oob"); | |
691 return uint_at(receiver_count_cell_index(row)); | |
692 } | |
693 | |
941 | 694 void set_receiver_count(uint row, uint count) { |
695 assert(row < row_limit(), "oob"); | |
696 set_uint_at(receiver_count_cell_index(row), count); | |
697 } | |
698 | |
699 void clear_row(uint row) { | |
700 assert(row < row_limit(), "oob"); | |
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701 // Clear total count - indicator of polymorphic call site. |
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702 // The site may look like as monomorphic after that but |
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703 // it allow to have more accurate profiling information because |
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704 // there was execution phase change since klasses were unloaded. |
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705 // If the site is still polymorphic then MDO will be updated |
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706 // to reflect it. But it could be the case that the site becomes |
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707 // only bimorphic. Then keeping total count not 0 will be wrong. |
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708 // Even if we use monomorphic (when it is not) for compilation |
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709 // we will only have trap, deoptimization and recompile again |
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710 // with updated MDO after executing method in Interpreter. |
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711 // An additional receiver will be recorded in the cleaned row |
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712 // during next call execution. |
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713 // |
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714 // Note: our profiling logic works with empty rows in any slot. |
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715 // We do sorting a profiling info (ciCallProfile) for compilation. |
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716 // |
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717 set_count(0); |
941 | 718 set_receiver(row, NULL); |
719 set_receiver_count(row, 0); | |
720 } | |
721 | |
0 | 722 // Code generation support |
723 static ByteSize receiver_offset(uint row) { | |
724 return cell_offset(receiver_cell_index(row)); | |
725 } | |
726 static ByteSize receiver_count_offset(uint row) { | |
727 return cell_offset(receiver_count_cell_index(row)); | |
728 } | |
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729 #ifdef GRAAL |
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730 static ByteSize nonprofiled_receiver_count_offset() { |
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731 return cell_offset(nonprofiled_receiver_count_off_set); |
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732 } |
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733 #endif |
0 | 734 static ByteSize receiver_type_data_size() { |
735 return cell_offset(static_cell_count()); | |
736 } | |
737 | |
738 // GC support | |
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739 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 740 |
741 #ifndef PRODUCT | |
742 void print_receiver_data_on(outputStream* st); | |
743 void print_data_on(outputStream* st); | |
744 #endif | |
745 }; | |
746 | |
747 // VirtualCallData | |
748 // | |
749 // A VirtualCallData is used to access profiling information about a | |
750 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
751 class VirtualCallData : public ReceiverTypeData { | |
752 public: | |
753 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
754 assert(layout->tag() == DataLayout::virtual_call_data_tag, "wrong type"); | |
755 } | |
756 | |
757 virtual bool is_VirtualCallData() { return true; } | |
758 | |
759 static int static_cell_count() { | |
760 // At this point we could add more profile state, e.g., for arguments. | |
761 // But for now it's the same size as the base record type. | |
762 return ReceiverTypeData::static_cell_count(); | |
763 } | |
764 | |
765 virtual int cell_count() { | |
766 return static_cell_count(); | |
767 } | |
768 | |
769 // Direct accessors | |
770 static ByteSize virtual_call_data_size() { | |
771 return cell_offset(static_cell_count()); | |
772 } | |
773 | |
774 #ifndef PRODUCT | |
775 void print_data_on(outputStream* st); | |
776 #endif | |
777 }; | |
778 | |
779 // RetData | |
780 // | |
781 // A RetData is used to access profiling information for a ret bytecode. | |
782 // It is composed of a count of the number of times that the ret has | |
783 // been executed, followed by a series of triples of the form | |
784 // (bci, count, di) which count the number of times that some bci was the | |
785 // target of the ret and cache a corresponding data displacement. | |
786 class RetData : public CounterData { | |
787 protected: | |
788 enum { | |
789 bci0_offset = counter_cell_count, | |
790 count0_offset, | |
791 displacement0_offset, | |
792 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
793 }; | |
794 | |
795 void set_bci(uint row, int bci) { | |
796 assert((uint)row < row_limit(), "oob"); | |
797 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
798 } | |
799 void release_set_bci(uint row, int bci) { | |
800 assert((uint)row < row_limit(), "oob"); | |
801 // 'release' when setting the bci acts as a valid flag for other | |
802 // threads wrt bci_count and bci_displacement. | |
803 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
804 } | |
805 void set_bci_count(uint row, uint count) { | |
806 assert((uint)row < row_limit(), "oob"); | |
807 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
808 } | |
809 void set_bci_displacement(uint row, int disp) { | |
810 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
811 } | |
812 | |
813 public: | |
814 RetData(DataLayout* layout) : CounterData(layout) { | |
815 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
816 } | |
817 | |
818 virtual bool is_RetData() { return true; } | |
819 | |
820 enum { | |
821 no_bci = -1 // value of bci when bci1/2 are not in use. | |
822 }; | |
823 | |
824 static int static_cell_count() { | |
825 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
826 } | |
827 | |
828 virtual int cell_count() { | |
829 return static_cell_count(); | |
830 } | |
831 | |
832 static uint row_limit() { | |
833 return BciProfileWidth; | |
834 } | |
835 static int bci_cell_index(uint row) { | |
836 return bci0_offset + row * ret_row_cell_count; | |
837 } | |
838 static int bci_count_cell_index(uint row) { | |
839 return count0_offset + row * ret_row_cell_count; | |
840 } | |
841 static int bci_displacement_cell_index(uint row) { | |
842 return displacement0_offset + row * ret_row_cell_count; | |
843 } | |
844 | |
845 // Direct accessors | |
846 int bci(uint row) { | |
847 return int_at(bci_cell_index(row)); | |
848 } | |
849 uint bci_count(uint row) { | |
850 return uint_at(bci_count_cell_index(row)); | |
851 } | |
852 int bci_displacement(uint row) { | |
853 return int_at(bci_displacement_cell_index(row)); | |
854 } | |
855 | |
856 // Interpreter Runtime support | |
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857 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 858 |
859 // Code generation support | |
860 static ByteSize bci_offset(uint row) { | |
861 return cell_offset(bci_cell_index(row)); | |
862 } | |
863 static ByteSize bci_count_offset(uint row) { | |
864 return cell_offset(bci_count_cell_index(row)); | |
865 } | |
866 static ByteSize bci_displacement_offset(uint row) { | |
867 return cell_offset(bci_displacement_cell_index(row)); | |
868 } | |
869 | |
870 // Specific initialization. | |
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871 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 872 |
873 #ifndef PRODUCT | |
874 void print_data_on(outputStream* st); | |
875 #endif | |
876 }; | |
877 | |
878 // BranchData | |
879 // | |
880 // A BranchData is used to access profiling data for a two-way branch. | |
881 // It consists of taken and not_taken counts as well as a data displacement | |
882 // for the taken case. | |
883 class BranchData : public JumpData { | |
884 protected: | |
885 enum { | |
886 not_taken_off_set = jump_cell_count, | |
887 branch_cell_count | |
888 }; | |
889 | |
890 void set_displacement(int displacement) { | |
891 set_int_at(displacement_off_set, displacement); | |
892 } | |
893 | |
894 public: | |
895 BranchData(DataLayout* layout) : JumpData(layout) { | |
896 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
897 } | |
898 | |
899 virtual bool is_BranchData() { return true; } | |
900 | |
901 static int static_cell_count() { | |
902 return branch_cell_count; | |
903 } | |
904 | |
905 virtual int cell_count() { | |
906 return static_cell_count(); | |
907 } | |
908 | |
909 // Direct accessor | |
910 uint not_taken() { | |
911 return uint_at(not_taken_off_set); | |
912 } | |
913 | |
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914 void set_not_taken(uint cnt) { |
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915 set_uint_at(not_taken_off_set, cnt); |
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916 } |
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917 |
0 | 918 uint inc_not_taken() { |
919 uint cnt = not_taken() + 1; | |
920 // Did we wrap? Will compiler screw us?? | |
921 if (cnt == 0) cnt--; | |
922 set_uint_at(not_taken_off_set, cnt); | |
923 return cnt; | |
924 } | |
925 | |
926 // Code generation support | |
927 static ByteSize not_taken_offset() { | |
928 return cell_offset(not_taken_off_set); | |
929 } | |
930 static ByteSize branch_data_size() { | |
931 return cell_offset(branch_cell_count); | |
932 } | |
933 | |
934 // Specific initialization. | |
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935 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 936 |
937 #ifndef PRODUCT | |
938 void print_data_on(outputStream* st); | |
939 #endif | |
940 }; | |
941 | |
942 // ArrayData | |
943 // | |
944 // A ArrayData is a base class for accessing profiling data which does | |
945 // not have a statically known size. It consists of an array length | |
946 // and an array start. | |
947 class ArrayData : public ProfileData { | |
948 protected: | |
949 friend class DataLayout; | |
950 | |
951 enum { | |
952 array_len_off_set, | |
953 array_start_off_set | |
954 }; | |
955 | |
956 uint array_uint_at(int index) { | |
957 int aindex = index + array_start_off_set; | |
958 return uint_at(aindex); | |
959 } | |
960 int array_int_at(int index) { | |
961 int aindex = index + array_start_off_set; | |
962 return int_at(aindex); | |
963 } | |
964 oop array_oop_at(int index) { | |
965 int aindex = index + array_start_off_set; | |
966 return oop_at(aindex); | |
967 } | |
968 void array_set_int_at(int index, int value) { | |
969 int aindex = index + array_start_off_set; | |
970 set_int_at(aindex, value); | |
971 } | |
972 | |
973 // Code generation support for subclasses. | |
974 static ByteSize array_element_offset(int index) { | |
975 return cell_offset(array_start_off_set + index); | |
976 } | |
977 | |
978 public: | |
979 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
980 | |
981 virtual bool is_ArrayData() { return true; } | |
982 | |
983 static int static_cell_count() { | |
984 return -1; | |
985 } | |
986 | |
987 int array_len() { | |
988 return int_at_unchecked(array_len_off_set); | |
989 } | |
990 | |
991 virtual int cell_count() { | |
992 return array_len() + 1; | |
993 } | |
994 | |
995 // Code generation support | |
996 static ByteSize array_len_offset() { | |
997 return cell_offset(array_len_off_set); | |
998 } | |
999 static ByteSize array_start_offset() { | |
1000 return cell_offset(array_start_off_set); | |
1001 } | |
1002 }; | |
1003 | |
1004 // MultiBranchData | |
1005 // | |
1006 // A MultiBranchData is used to access profiling information for | |
1007 // a multi-way branch (*switch bytecodes). It consists of a series | |
1008 // of (count, displacement) pairs, which count the number of times each | |
1009 // case was taken and specify the data displacment for each branch target. | |
1010 class MultiBranchData : public ArrayData { | |
1011 protected: | |
1012 enum { | |
1013 default_count_off_set, | |
1014 default_disaplacement_off_set, | |
1015 case_array_start | |
1016 }; | |
1017 enum { | |
1018 relative_count_off_set, | |
1019 relative_displacement_off_set, | |
1020 per_case_cell_count | |
1021 }; | |
1022 | |
1023 void set_default_displacement(int displacement) { | |
1024 array_set_int_at(default_disaplacement_off_set, displacement); | |
1025 } | |
1026 void set_displacement_at(int index, int displacement) { | |
1027 array_set_int_at(case_array_start + | |
1028 index * per_case_cell_count + | |
1029 relative_displacement_off_set, | |
1030 displacement); | |
1031 } | |
1032 | |
1033 public: | |
1034 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1035 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1036 } | |
1037 | |
1038 virtual bool is_MultiBranchData() { return true; } | |
1039 | |
1040 static int compute_cell_count(BytecodeStream* stream); | |
1041 | |
1042 int number_of_cases() { | |
1043 int alen = array_len() - 2; // get rid of default case here. | |
1044 assert(alen % per_case_cell_count == 0, "must be even"); | |
1045 return (alen / per_case_cell_count); | |
1046 } | |
1047 | |
1048 uint default_count() { | |
1049 return array_uint_at(default_count_off_set); | |
1050 } | |
1051 int default_displacement() { | |
1052 return array_int_at(default_disaplacement_off_set); | |
1053 } | |
1054 | |
1055 uint count_at(int index) { | |
1056 return array_uint_at(case_array_start + | |
1057 index * per_case_cell_count + | |
1058 relative_count_off_set); | |
1059 } | |
1060 int displacement_at(int index) { | |
1061 return array_int_at(case_array_start + | |
1062 index * per_case_cell_count + | |
1063 relative_displacement_off_set); | |
1064 } | |
1065 | |
1066 // Code generation support | |
1067 static ByteSize default_count_offset() { | |
1068 return array_element_offset(default_count_off_set); | |
1069 } | |
1070 static ByteSize default_displacement_offset() { | |
1071 return array_element_offset(default_disaplacement_off_set); | |
1072 } | |
1073 static ByteSize case_count_offset(int index) { | |
1074 return case_array_offset() + | |
1075 (per_case_size() * index) + | |
1076 relative_count_offset(); | |
1077 } | |
1078 static ByteSize case_array_offset() { | |
1079 return array_element_offset(case_array_start); | |
1080 } | |
1081 static ByteSize per_case_size() { | |
1082 return in_ByteSize(per_case_cell_count) * cell_size; | |
1083 } | |
1084 static ByteSize relative_count_offset() { | |
1085 return in_ByteSize(relative_count_off_set) * cell_size; | |
1086 } | |
1087 static ByteSize relative_displacement_offset() { | |
1088 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1089 } | |
1090 | |
1091 // Specific initialization. | |
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1092 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1093 |
1094 #ifndef PRODUCT | |
1095 void print_data_on(outputStream* st); | |
1096 #endif | |
1097 }; | |
1098 | |
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1099 class ArgInfoData : public ArrayData { |
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1100 |
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1101 public: |
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1102 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1103 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1104 } |
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1105 |
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1106 virtual bool is_ArgInfoData() { return true; } |
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1107 |
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1108 |
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1109 int number_of_args() { |
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1110 return array_len(); |
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1111 } |
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1112 |
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1113 uint arg_modified(int arg) { |
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1114 return array_uint_at(arg); |
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1115 } |
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1116 |
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1117 void set_arg_modified(int arg, uint val) { |
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1118 array_set_int_at(arg, val); |
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1119 } |
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1120 |
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1121 #ifndef PRODUCT |
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1122 void print_data_on(outputStream* st); |
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1123 #endif |
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1124 }; |
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1125 |
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1126 // MethodData* |
0 | 1127 // |
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1128 // A MethodData* holds information which has been collected about |
0 | 1129 // a method. Its layout looks like this: |
1130 // | |
1131 // ----------------------------- | |
1132 // | header | | |
1133 // | klass | | |
1134 // ----------------------------- | |
1135 // | method | | |
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1136 // | size of the MethodData* | |
0 | 1137 // ----------------------------- |
1138 // | Data entries... | | |
1139 // | (variable size) | | |
1140 // | | | |
1141 // . . | |
1142 // . . | |
1143 // . . | |
1144 // | | | |
1145 // ----------------------------- | |
1146 // | |
1147 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1148 // DataLayout in the array corresponds to a specific bytecode in the | |
1149 // method. The entries in the array are sorted by the corresponding | |
1150 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1151 // which point to the underlying blocks of DataLayout structures. | |
1152 // | |
1153 // During interpretation, if profiling in enabled, the interpreter | |
1154 // maintains a method data pointer (mdp), which points at the entry | |
1155 // in the array corresponding to the current bci. In the course of | |
1156 // intepretation, when a bytecode is encountered that has profile data | |
1157 // associated with it, the entry pointed to by mdp is updated, then the | |
1158 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1159 // is NULL to begin with, the interpreter assumes that the current method | |
1160 // is not (yet) being profiled. | |
1161 // | |
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1162 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1163 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1164 // from the base of the data entry array. A "displacement" is the byte offset | |
1165 // in certain ProfileData objects that indicate the amount the mdp must be | |
1166 // adjusted in the event of a change in control flow. | |
1167 // | |
1168 | |
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1169 class MethodData : public Metadata { |
0 | 1170 friend class VMStructs; |
1171 private: | |
1172 friend class ProfileData; | |
1173 | |
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1174 // Back pointer to the Method* |
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1175 Method* _method; |
0 | 1176 |
1177 // Size of this oop in bytes | |
1178 int _size; | |
1179 | |
1180 // Cached hint for bci_to_dp and bci_to_data | |
1181 int _hint_di; | |
1182 | |
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1183 MethodData(methodHandle method, int size, TRAPS); |
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1184 public: |
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1185 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1186 MethodData() {}; // For ciMethodData |
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1187 |
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1188 bool is_methodData() const volatile { return true; } |
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1189 void initialize(); |
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1190 |
0 | 1191 // Whole-method sticky bits and flags |
1192 enum { | |
3345 | 1193 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1194 _trap_hist_mask = max_jubyte, |
1195 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1196 }; // Public flag values | |
1197 private: | |
1198 uint _nof_decompiles; // count of all nmethod removals | |
1199 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1200 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1201 union { | |
1202 intptr_t _align; | |
1203 u1 _array[_trap_hist_limit]; | |
1204 } _trap_hist; | |
1205 | |
1206 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1207 intx _eflags; // flags on escape information | |
1208 intx _arg_local; // bit set of non-escaping arguments | |
1209 intx _arg_stack; // bit set of stack-allocatable arguments | |
1210 intx _arg_returned; // bit set of returned arguments | |
1211 | |
1783 | 1212 int _creation_mileage; // method mileage at MDO creation |
1213 | |
1214 // How many invocations has this MDO seen? | |
1215 // These counters are used to determine the exact age of MDO. | |
1216 // We need those because in tiered a method can be concurrently | |
1217 // executed at different levels. | |
1218 InvocationCounter _invocation_counter; | |
1219 // Same for backedges. | |
1220 InvocationCounter _backedge_counter; | |
2252 | 1221 // Counter values at the time profiling started. |
1222 int _invocation_counter_start; | |
1223 int _backedge_counter_start; | |
1783 | 1224 // Number of loops and blocks is computed when compiling the first |
1225 // time with C1. It is used to determine if method is trivial. | |
1226 short _num_loops; | |
1227 short _num_blocks; | |
1228 // Highest compile level this method has ever seen. | |
1229 u1 _highest_comp_level; | |
1230 // Same for OSR level | |
1231 u1 _highest_osr_comp_level; | |
1232 // Does this method contain anything worth profiling? | |
1233 bool _would_profile; | |
0 | 1234 |
1235 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1236 int _data_size; | |
1237 | |
1238 // Beginning of the data entries | |
1239 intptr_t _data[1]; | |
1240 | |
1241 // Helper for size computation | |
1242 static int compute_data_size(BytecodeStream* stream); | |
1243 static int bytecode_cell_count(Bytecodes::Code code); | |
1244 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1245 | |
1246 // Helper for initialization | |
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1247 DataLayout* data_layout_at(int data_index) const { |
0 | 1248 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1249 return (DataLayout*) (((address)_data) + data_index); | |
1250 } | |
1251 | |
1252 // Initialize an individual data segment. Returns the size of | |
1253 // the segment in bytes. | |
1254 int initialize_data(BytecodeStream* stream, int data_index); | |
1255 | |
1256 // Helper for data_at | |
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1257 DataLayout* limit_data_position() const { |
0 | 1258 return (DataLayout*)((address)data_base() + _data_size); |
1259 } | |
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1260 bool out_of_bounds(int data_index) const { |
0 | 1261 return data_index >= data_size(); |
1262 } | |
1263 | |
1264 // Give each of the data entries a chance to perform specific | |
1265 // data initialization. | |
1266 void post_initialize(BytecodeStream* stream); | |
1267 | |
1268 // hint accessors | |
1269 int hint_di() const { return _hint_di; } | |
1270 void set_hint_di(int di) { | |
1271 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1272 _hint_di = di; | |
1273 } | |
1274 ProfileData* data_before(int bci) { | |
1275 // avoid SEGV on this edge case | |
1276 if (data_size() == 0) | |
1277 return NULL; | |
1278 int hint = hint_di(); | |
1279 if (data_layout_at(hint)->bci() <= bci) | |
1280 return data_at(hint); | |
1281 return first_data(); | |
1282 } | |
1283 | |
1284 // What is the index of the first data entry? | |
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1285 int first_di() const { return 0; } |
0 | 1286 |
1287 // Find or create an extra ProfileData: | |
1288 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1289 | |
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1290 // return the argument info cell |
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1291 ArgInfoData *arg_info(); |
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1292 |
0 | 1293 public: |
1294 static int header_size() { | |
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1295 return sizeof(MethodData)/wordSize; |
0 | 1296 } |
1297 | |
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1298 // Compute the size of a MethodData* before it is created. |
0 | 1299 static int compute_allocation_size_in_bytes(methodHandle method); |
1300 static int compute_allocation_size_in_words(methodHandle method); | |
1301 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1302 | |
1303 // Determine if a given bytecode can have profile information. | |
1304 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1305 return bytecode_cell_count(code) != no_profile_data; | |
1306 } | |
1307 | |
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1308 // reset into original state |
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1309 void init(); |
0 | 1310 |
1311 // My size | |
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1312 int size_in_bytes() const { return _size; } |
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1313 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1314 #if INCLUDE_SERVICES |
1315 void collect_statistics(KlassSizeStats *sz) const; | |
1316 #endif | |
0 | 1317 |
1318 int creation_mileage() const { return _creation_mileage; } | |
1319 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1320 |
1321 int invocation_count() { | |
1322 if (invocation_counter()->carry()) { | |
1323 return InvocationCounter::count_limit; | |
1324 } | |
1325 return invocation_counter()->count(); | |
1326 } | |
1327 int backedge_count() { | |
1328 if (backedge_counter()->carry()) { | |
1329 return InvocationCounter::count_limit; | |
1330 } | |
1331 return backedge_counter()->count(); | |
1332 } | |
1333 | |
2252 | 1334 int invocation_count_start() { |
1335 if (invocation_counter()->carry()) { | |
1336 return 0; | |
1337 } | |
1338 return _invocation_counter_start; | |
1339 } | |
1340 | |
1341 int backedge_count_start() { | |
1342 if (backedge_counter()->carry()) { | |
1343 return 0; | |
1344 } | |
1345 return _backedge_counter_start; | |
1346 } | |
1347 | |
1348 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1349 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1350 | |
1351 void reset_start_counters() { | |
1352 _invocation_counter_start = invocation_count(); | |
1353 _backedge_counter_start = backedge_count(); | |
1354 } | |
1355 | |
1783 | 1356 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1357 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1358 | |
1359 void set_would_profile(bool p) { _would_profile = p; } | |
1360 bool would_profile() const { return _would_profile; } | |
1361 | |
1362 int highest_comp_level() { return _highest_comp_level; } | |
1363 void set_highest_comp_level(int level) { _highest_comp_level = level; } | |
1364 int highest_osr_comp_level() { return _highest_osr_comp_level; } | |
1365 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } | |
1366 | |
1367 int num_loops() const { return _num_loops; } | |
1368 void set_num_loops(int n) { _num_loops = n; } | |
1369 int num_blocks() const { return _num_blocks; } | |
1370 void set_num_blocks(int n) { _num_blocks = n; } | |
1371 | |
0 | 1372 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1373 static int mileage_of(Method* m); |
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1374 static bool is_empty_data(int size, Bytecodes::Code code); |
0 | 1375 |
1376 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1377 enum EscapeFlag { | |
1378 estimated = 1 << 0, | |
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1379 return_local = 1 << 1, |
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1380 return_allocated = 1 << 2, |
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1381 allocated_escapes = 1 << 3, |
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1382 unknown_modified = 1 << 4 |
0 | 1383 }; |
1384 | |
1385 intx eflags() { return _eflags; } | |
1386 intx arg_local() { return _arg_local; } | |
1387 intx arg_stack() { return _arg_stack; } | |
1388 intx arg_returned() { return _arg_returned; } | |
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1389 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1390 assert(aid != NULL, "arg_info must be not null"); |
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1391 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1392 return aid->arg_modified(a); } |
0 | 1393 |
1394 void set_eflags(intx v) { _eflags = v; } | |
1395 void set_arg_local(intx v) { _arg_local = v; } | |
1396 void set_arg_stack(intx v) { _arg_stack = v; } | |
1397 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1398 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1399 assert(aid != NULL, "arg_info must be not null"); |
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1400 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1401 aid->set_arg_modified(a, v); } |
0 | 1402 |
1403 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1404 | |
1405 // Location and size of data area | |
1406 address data_base() const { | |
1407 return (address) _data; | |
1408 } | |
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1409 int data_size() const { |
0 | 1410 return _data_size; |
1411 } | |
1412 | |
1413 // Accessors | |
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1414 Method* method() const { return _method; } |
0 | 1415 |
1416 // Get the data at an arbitrary (sort of) data index. | |
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1417 ProfileData* data_at(int data_index) const; |
0 | 1418 |
1419 // Walk through the data in order. | |
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1420 ProfileData* first_data() const { return data_at(first_di()); } |
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1421 ProfileData* next_data(ProfileData* current) const; |
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1422 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 1423 |
1424 // Convert a dp (data pointer) to a di (data index). | |
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1425 int dp_to_di(address dp) const { |
0 | 1426 return dp - ((address)_data); |
1427 } | |
1428 | |
1429 address di_to_dp(int di) { | |
1430 return (address)data_layout_at(di); | |
1431 } | |
1432 | |
1433 // bci to di/dp conversion. | |
1434 address bci_to_dp(int bci); | |
1435 int bci_to_di(int bci) { | |
1436 return dp_to_di(bci_to_dp(bci)); | |
1437 } | |
1438 | |
1439 // Get the data at an arbitrary bci, or NULL if there is none. | |
1440 ProfileData* bci_to_data(int bci); | |
1441 | |
1442 // Same, but try to create an extra_data record if one is needed: | |
1443 ProfileData* allocate_bci_to_data(int bci) { | |
1444 ProfileData* data = bci_to_data(bci); | |
1445 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1446 } | |
1447 | |
1448 // Add a handful of extra data records, for trap tracking. | |
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1449 DataLayout* extra_data_base() const { return limit_data_position(); } |
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1450 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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1451 int extra_data_size() const { return (address)extra_data_limit() |
0 | 1452 - (address)extra_data_base(); } |
1453 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1454 | |
1455 // Return (uint)-1 for overflow. | |
1456 uint trap_count(int reason) const { | |
1457 assert((uint)reason < _trap_hist_limit, "oob"); | |
1458 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1459 } | |
1460 // For loops: | |
1461 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1462 static uint trap_count_limit() { return _trap_hist_mask; } | |
1463 uint inc_trap_count(int reason) { | |
1464 // Count another trap, anywhere in this method. | |
1465 assert(reason >= 0, "must be single trap"); | |
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1466 assert((uint)reason < _trap_hist_limit, "oob"); |
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1467 uint cnt1 = 1 + _trap_hist._array[reason]; |
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1468 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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1469 _trap_hist._array[reason] = cnt1; |
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1470 return cnt1; |
0 | 1471 } else { |
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1472 return _trap_hist_mask + (++_nof_overflow_traps); |
0 | 1473 } |
1474 } | |
1475 | |
1476 uint overflow_trap_count() const { | |
1477 return _nof_overflow_traps; | |
1478 } | |
1479 uint overflow_recompile_count() const { | |
1480 return _nof_overflow_recompiles; | |
1481 } | |
1482 void inc_overflow_recompile_count() { | |
1483 _nof_overflow_recompiles += 1; | |
1484 } | |
1485 uint decompile_count() const { | |
1486 return _nof_decompiles; | |
1487 } | |
1488 void inc_decompile_count() { | |
1489 _nof_decompiles += 1; | |
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1490 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 1491 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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1492 } |
0 | 1493 } |
1494 | |
1495 // Support for code generation | |
1496 static ByteSize data_offset() { | |
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1497 return byte_offset_of(MethodData, _data[0]); |
0 | 1498 } |
1499 | |
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1500 static ByteSize trap_history_offset() { |
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1501 return byte_offset_of(MethodData, _trap_hist._array); |
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1502 } |
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1503 |
1783 | 1504 static ByteSize invocation_counter_offset() { |
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1505 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 1506 } |
1507 static ByteSize backedge_counter_offset() { | |
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1508 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 1509 } |
1510 | |
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1511 // Deallocation support - no pointer fields to deallocate |
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1512 void deallocate_contents(ClassLoaderData* loader_data) {} |
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1513 |
0 | 1514 // GC support |
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1515 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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1516 |
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1517 // Printing |
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1518 #ifndef PRODUCT |
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1519 void print_on (outputStream* st) const; |
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1520 #endif |
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1521 void print_value_on(outputStream* st) const; |
0 | 1522 |
1523 #ifndef PRODUCT | |
1524 // printing support for method data | |
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1525 void print_data_on(outputStream* st) const; |
0 | 1526 #endif |
1527 | |
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1528 const char* internal_name() const { return "{method data}"; } |
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1529 |
0 | 1530 // verification |
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1531 void verify_on(outputStream* st); |
0 | 1532 void verify_data_on(outputStream* st); |
1533 }; | |
1972 | 1534 |
1535 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |