Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.cpp @ 12660:a2b1ee69ce46
Loose unnecessary input dependencies from write barriers
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Mon, 04 Nov 2013 15:42:27 +0100 |
parents | 359f7e70ae7f |
children | 096c224171c4 |
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 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "interpreter/bytecode.hpp" | |
28 #include "interpreter/bytecodeStream.hpp" | |
29 #include "interpreter/linkResolver.hpp" | |
7956 | 30 #include "memory/heapInspection.hpp" |
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31 #include "oops/methodData.hpp" |
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32 #include "prims/jvmtiRedefineClasses.hpp" |
1972 | 33 #include "runtime/compilationPolicy.hpp" |
34 #include "runtime/deoptimization.hpp" | |
35 #include "runtime/handles.inline.hpp" | |
0 | 36 |
37 // ================================================================== | |
38 // DataLayout | |
39 // | |
40 // Overlay for generic profiling data. | |
41 | |
42 // Some types of data layouts need a length field. | |
43 bool DataLayout::needs_array_len(u1 tag) { | |
45
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44 return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag); |
0 | 45 } |
46 | |
47 // Perform generic initialization of the data. More specific | |
48 // initialization occurs in overrides of ProfileData::post_initialize. | |
49 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { | |
50 _header._bits = (intptr_t)0; | |
51 _header._struct._tag = tag; | |
52 _header._struct._bci = bci; | |
53 for (int i = 0; i < cell_count; i++) { | |
54 set_cell_at(i, (intptr_t)0); | |
55 } | |
56 if (needs_array_len(tag)) { | |
57 set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. | |
58 } | |
59 } | |
60 | |
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61 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) { |
941 | 62 ResourceMark m; |
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63 data_in()->clean_weak_klass_links(cl); |
941 | 64 } |
65 | |
66 | |
0 | 67 // ================================================================== |
68 // ProfileData | |
69 // | |
70 // A ProfileData object is created to refer to a section of profiling | |
71 // data in a structured way. | |
72 | |
73 // Constructor for invalid ProfileData. | |
74 ProfileData::ProfileData() { | |
75 _data = NULL; | |
76 } | |
77 | |
78 #ifndef PRODUCT | |
79 void ProfileData::print_shared(outputStream* st, const char* name) { | |
80 st->print("bci: %d", bci()); | |
81 st->fill_to(tab_width_one); | |
82 st->print("%s", name); | |
83 tab(st); | |
84 int trap = trap_state(); | |
85 if (trap != 0) { | |
86 char buf[100]; | |
87 st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); | |
88 } | |
89 int flags = data()->flags(); | |
90 if (flags != 0) | |
91 st->print("flags(%d) ", flags); | |
92 } | |
93 | |
94 void ProfileData::tab(outputStream* st) { | |
95 st->fill_to(tab_width_two); | |
96 } | |
97 #endif // !PRODUCT | |
98 | |
99 // ================================================================== | |
100 // BitData | |
101 // | |
102 // A BitData corresponds to a one-bit flag. This is used to indicate | |
103 // whether a checkcast bytecode has seen a null value. | |
104 | |
105 | |
106 #ifndef PRODUCT | |
107 void BitData::print_data_on(outputStream* st) { | |
108 print_shared(st, "BitData"); | |
109 } | |
110 #endif // !PRODUCT | |
111 | |
112 // ================================================================== | |
113 // CounterData | |
114 // | |
115 // A CounterData corresponds to a simple counter. | |
116 | |
117 #ifndef PRODUCT | |
118 void CounterData::print_data_on(outputStream* st) { | |
119 print_shared(st, "CounterData"); | |
120 st->print_cr("count(%u)", count()); | |
121 } | |
122 #endif // !PRODUCT | |
123 | |
124 // ================================================================== | |
125 // JumpData | |
126 // | |
127 // A JumpData is used to access profiling information for a direct | |
128 // branch. It is a counter, used for counting the number of branches, | |
129 // plus a data displacement, used for realigning the data pointer to | |
130 // the corresponding target bci. | |
131 | |
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132 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 133 assert(stream->bci() == bci(), "wrong pos"); |
134 int target; | |
135 Bytecodes::Code c = stream->code(); | |
136 if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { | |
137 target = stream->dest_w(); | |
138 } else { | |
139 target = stream->dest(); | |
140 } | |
141 int my_di = mdo->dp_to_di(dp()); | |
142 int target_di = mdo->bci_to_di(target); | |
143 int offset = target_di - my_di; | |
144 set_displacement(offset); | |
145 } | |
146 | |
147 #ifndef PRODUCT | |
148 void JumpData::print_data_on(outputStream* st) { | |
149 print_shared(st, "JumpData"); | |
150 st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); | |
151 } | |
152 #endif // !PRODUCT | |
153 | |
154 // ================================================================== | |
155 // ReceiverTypeData | |
156 // | |
157 // A ReceiverTypeData is used to access profiling information about a | |
158 // dynamic type check. It consists of a counter which counts the total times | |
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159 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 160 // which are used to store a type profile for the receiver of the check. |
161 | |
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162 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
941 | 163 for (uint row = 0; row < row_limit(); row++) { |
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164 Klass* p = receiver(row); |
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165 if (p != NULL && !p->is_loader_alive(is_alive_cl)) { |
941 | 166 clear_row(row); |
167 } | |
168 } | |
169 } | |
170 | |
9765 | 171 #ifdef GRAAL |
172 void VirtualCallData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { | |
173 ReceiverTypeData::clean_weak_klass_links(is_alive_cl); | |
174 for (uint row = 0; row < method_row_limit(); row++) { | |
175 Method* p = method(row); | |
176 if (p != NULL && !p->method_holder()->is_loader_alive(is_alive_cl)) { | |
177 clear_method_row(row); | |
178 } | |
179 } | |
180 } | |
181 #endif // GRAAL | |
182 | |
0 | 183 #ifndef PRODUCT |
184 void ReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
185 uint row; | |
186 int entries = 0; | |
187 for (row = 0; row < row_limit(); row++) { | |
188 if (receiver(row) != NULL) entries++; | |
189 } | |
190 st->print_cr("count(%u) entries(%u)", count(), entries); | |
1783 | 191 int total = count(); |
192 for (row = 0; row < row_limit(); row++) { | |
193 if (receiver(row) != NULL) { | |
194 total += receiver_count(row); | |
195 } | |
196 } | |
0 | 197 for (row = 0; row < row_limit(); row++) { |
198 if (receiver(row) != NULL) { | |
199 tab(st); | |
200 receiver(row)->print_value_on(st); | |
1783 | 201 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
0 | 202 } |
203 } | |
204 } | |
205 void ReceiverTypeData::print_data_on(outputStream* st) { | |
206 print_shared(st, "ReceiverTypeData"); | |
207 print_receiver_data_on(st); | |
208 } | |
209 void VirtualCallData::print_data_on(outputStream* st) { | |
210 print_shared(st, "VirtualCallData"); | |
211 print_receiver_data_on(st); | |
212 } | |
213 #endif // !PRODUCT | |
214 | |
215 // ================================================================== | |
216 // RetData | |
217 // | |
218 // A RetData is used to access profiling information for a ret bytecode. | |
219 // It is composed of a count of the number of times that the ret has | |
220 // been executed, followed by a series of triples of the form | |
221 // (bci, count, di) which count the number of times that some bci was the | |
222 // target of the ret and cache a corresponding displacement. | |
223 | |
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224 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 225 for (uint row = 0; row < row_limit(); row++) { |
226 set_bci_displacement(row, -1); | |
227 set_bci(row, no_bci); | |
228 } | |
229 // release so other threads see a consistent state. bci is used as | |
230 // a valid flag for bci_displacement. | |
231 OrderAccess::release(); | |
232 } | |
233 | |
234 // This routine needs to atomically update the RetData structure, so the | |
235 // caller needs to hold the RetData_lock before it gets here. Since taking | |
236 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
237 // wrapper around a derived oop, taking the lock in _this_ method will | |
238 // basically cause the 'this' pointer's _data field to contain junk after the | |
239 // lock. We require the caller to take the lock before making the ProfileData | |
240 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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241 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
0 | 242 // First find the mdp which corresponds to the return bci. |
243 address mdp = h_mdo->bci_to_dp(return_bci); | |
244 | |
245 // Now check to see if any of the cache slots are open. | |
246 for (uint row = 0; row < row_limit(); row++) { | |
247 if (bci(row) == no_bci) { | |
248 set_bci_displacement(row, mdp - dp()); | |
249 set_bci_count(row, DataLayout::counter_increment); | |
250 // Barrier to ensure displacement is written before the bci; allows | |
251 // the interpreter to read displacement without fear of race condition. | |
252 release_set_bci(row, return_bci); | |
253 break; | |
254 } | |
255 } | |
256 return mdp; | |
257 } | |
258 | |
259 | |
260 #ifndef PRODUCT | |
261 void RetData::print_data_on(outputStream* st) { | |
262 print_shared(st, "RetData"); | |
263 uint row; | |
264 int entries = 0; | |
265 for (row = 0; row < row_limit(); row++) { | |
266 if (bci(row) != no_bci) entries++; | |
267 } | |
268 st->print_cr("count(%u) entries(%u)", count(), entries); | |
269 for (row = 0; row < row_limit(); row++) { | |
270 if (bci(row) != no_bci) { | |
271 tab(st); | |
272 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
273 bci(row), bci_count(row), bci_displacement(row)); | |
274 } | |
275 } | |
276 } | |
277 #endif // !PRODUCT | |
278 | |
279 // ================================================================== | |
280 // BranchData | |
281 // | |
282 // A BranchData is used to access profiling data for a two-way branch. | |
283 // It consists of taken and not_taken counts as well as a data displacement | |
284 // for the taken case. | |
285 | |
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286 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 287 assert(stream->bci() == bci(), "wrong pos"); |
288 int target = stream->dest(); | |
289 int my_di = mdo->dp_to_di(dp()); | |
290 int target_di = mdo->bci_to_di(target); | |
291 int offset = target_di - my_di; | |
292 set_displacement(offset); | |
293 } | |
294 | |
295 #ifndef PRODUCT | |
296 void BranchData::print_data_on(outputStream* st) { | |
297 print_shared(st, "BranchData"); | |
298 st->print_cr("taken(%u) displacement(%d)", | |
299 taken(), displacement()); | |
300 tab(st); | |
301 st->print_cr("not taken(%u)", not_taken()); | |
302 } | |
303 #endif | |
304 | |
305 // ================================================================== | |
306 // MultiBranchData | |
307 // | |
308 // A MultiBranchData is used to access profiling information for | |
309 // a multi-way branch (*switch bytecodes). It consists of a series | |
310 // of (count, displacement) pairs, which count the number of times each | |
311 // case was taken and specify the data displacment for each branch target. | |
312 | |
313 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
314 int cell_count = 0; | |
315 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 316 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
317 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
0 | 318 } else { |
2142 | 319 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
320 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
0 | 321 } |
322 return cell_count; | |
323 } | |
324 | |
325 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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326 MethodData* mdo) { |
0 | 327 assert(stream->bci() == bci(), "wrong pos"); |
328 int target; | |
329 int my_di; | |
330 int target_di; | |
331 int offset; | |
332 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 333 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
334 int len = sw.length(); | |
0 | 335 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
336 for (int count = 0; count < len; count++) { | |
2142 | 337 target = sw.dest_offset_at(count) + bci(); |
0 | 338 my_di = mdo->dp_to_di(dp()); |
339 target_di = mdo->bci_to_di(target); | |
340 offset = target_di - my_di; | |
341 set_displacement_at(count, offset); | |
342 } | |
2142 | 343 target = sw.default_offset() + bci(); |
0 | 344 my_di = mdo->dp_to_di(dp()); |
345 target_di = mdo->bci_to_di(target); | |
346 offset = target_di - my_di; | |
347 set_default_displacement(offset); | |
348 | |
349 } else { | |
2142 | 350 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
351 int npairs = sw.number_of_pairs(); | |
0 | 352 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
353 for (int count = 0; count < npairs; count++) { | |
2142 | 354 LookupswitchPair pair = sw.pair_at(count); |
355 target = pair.offset() + bci(); | |
0 | 356 my_di = mdo->dp_to_di(dp()); |
357 target_di = mdo->bci_to_di(target); | |
358 offset = target_di - my_di; | |
359 set_displacement_at(count, offset); | |
360 } | |
2142 | 361 target = sw.default_offset() + bci(); |
0 | 362 my_di = mdo->dp_to_di(dp()); |
363 target_di = mdo->bci_to_di(target); | |
364 offset = target_di - my_di; | |
365 set_default_displacement(offset); | |
366 } | |
367 } | |
368 | |
369 #ifndef PRODUCT | |
370 void MultiBranchData::print_data_on(outputStream* st) { | |
371 print_shared(st, "MultiBranchData"); | |
372 st->print_cr("default_count(%u) displacement(%d)", | |
373 default_count(), default_displacement()); | |
374 int cases = number_of_cases(); | |
375 for (int i = 0; i < cases; i++) { | |
376 tab(st); | |
377 st->print_cr("count(%u) displacement(%d)", | |
378 count_at(i), displacement_at(i)); | |
379 } | |
380 } | |
381 #endif | |
382 | |
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383 #ifndef PRODUCT |
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384 void ArgInfoData::print_data_on(outputStream* st) { |
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385 print_shared(st, "ArgInfoData"); |
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386 int nargs = number_of_args(); |
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387 for (int i = 0; i < nargs; i++) { |
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388 st->print(" 0x%x", arg_modified(i)); |
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389 } |
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390 st->cr(); |
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391 } |
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392 |
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393 #endif |
0 | 394 // ================================================================== |
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395 // MethodData* |
0 | 396 // |
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397 // A MethodData* holds information which has been collected about |
0 | 398 // a method. |
399 | |
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400 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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401 int size = MethodData::compute_allocation_size_in_words(method); |
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402 |
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403 return new (loader_data, size, false, MetaspaceObj::MethodDataType, THREAD) |
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404 MethodData(method(), size, CHECK_NULL); |
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405 } |
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406 |
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407 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
8883 | 408 #if defined(COMPILER1) && !(defined(COMPILER2) || defined(GRAAL)) |
8860 | 409 return no_profile_data; |
410 #else | |
0 | 411 switch (code) { |
412 case Bytecodes::_checkcast: | |
413 case Bytecodes::_instanceof: | |
414 case Bytecodes::_aastore: | |
415 if (TypeProfileCasts) { | |
416 return ReceiverTypeData::static_cell_count(); | |
417 } else { | |
418 return BitData::static_cell_count(); | |
419 } | |
420 case Bytecodes::_invokespecial: | |
421 case Bytecodes::_invokestatic: | |
422 return CounterData::static_cell_count(); | |
423 case Bytecodes::_goto: | |
424 case Bytecodes::_goto_w: | |
425 case Bytecodes::_jsr: | |
426 case Bytecodes::_jsr_w: | |
427 return JumpData::static_cell_count(); | |
428 case Bytecodes::_invokevirtual: | |
429 case Bytecodes::_invokeinterface: | |
430 return VirtualCallData::static_cell_count(); | |
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431 case Bytecodes::_invokedynamic: |
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432 return CounterData::static_cell_count(); |
0 | 433 case Bytecodes::_ret: |
434 return RetData::static_cell_count(); | |
435 case Bytecodes::_ifeq: | |
436 case Bytecodes::_ifne: | |
437 case Bytecodes::_iflt: | |
438 case Bytecodes::_ifge: | |
439 case Bytecodes::_ifgt: | |
440 case Bytecodes::_ifle: | |
441 case Bytecodes::_if_icmpeq: | |
442 case Bytecodes::_if_icmpne: | |
443 case Bytecodes::_if_icmplt: | |
444 case Bytecodes::_if_icmpge: | |
445 case Bytecodes::_if_icmpgt: | |
446 case Bytecodes::_if_icmple: | |
447 case Bytecodes::_if_acmpeq: | |
448 case Bytecodes::_if_acmpne: | |
449 case Bytecodes::_ifnull: | |
450 case Bytecodes::_ifnonnull: | |
451 return BranchData::static_cell_count(); | |
452 case Bytecodes::_lookupswitch: | |
453 case Bytecodes::_tableswitch: | |
454 return variable_cell_count; | |
455 } | |
456 return no_profile_data; | |
8860 | 457 #endif |
0 | 458 } |
459 | |
460 // Compute the size of the profiling information corresponding to | |
461 // the current bytecode. | |
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462 int MethodData::compute_data_size(BytecodeStream* stream) { |
0 | 463 int cell_count = bytecode_cell_count(stream->code()); |
464 if (cell_count == no_profile_data) { | |
465 return 0; | |
466 } | |
467 if (cell_count == variable_cell_count) { | |
468 cell_count = MultiBranchData::compute_cell_count(stream); | |
469 } | |
470 // Note: cell_count might be zero, meaning that there is just | |
471 // a DataLayout header, with no extra cells. | |
472 assert(cell_count >= 0, "sanity"); | |
473 return DataLayout::compute_size_in_bytes(cell_count); | |
474 } | |
475 | |
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476 #ifdef GRAAL |
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477 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
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478 if (!ProfileTraps) return 0; |
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479 |
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480 // Assume that up to 30% of the possibly trapping BCIs with no MDP will need to allocate one. |
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481 return MIN2(empty_bc_count, MAX2(4, (empty_bc_count * 30) / 100)); |
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482 } |
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483 #else |
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484 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
0 | 485 if (ProfileTraps) { |
486 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
487 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
488 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
489 int one_percent_of_data | |
490 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
491 if (extra_data_count < one_percent_of_data) | |
492 extra_data_count = one_percent_of_data; | |
493 if (extra_data_count > empty_bc_count) | |
494 extra_data_count = empty_bc_count; // no need for more | |
495 return extra_data_count; | |
496 } else { | |
497 return 0; | |
498 } | |
499 } | |
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500 #endif |
0 | 501 |
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502 // Compute the size of the MethodData* necessary to store |
0 | 503 // profiling information about a given method. Size is in bytes. |
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504 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
0 | 505 int data_size = 0; |
506 BytecodeStream stream(method); | |
507 Bytecodes::Code c; | |
508 int empty_bc_count = 0; // number of bytecodes lacking data | |
509 while ((c = stream.next()) >= 0) { | |
510 int size_in_bytes = compute_data_size(&stream); | |
511 data_size += size_in_bytes; | |
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512 |
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513 if (is_empty_data(size_in_bytes, c)) empty_bc_count += 1; |
0 | 514 } |
515 int object_size = in_bytes(data_offset()) + data_size; | |
516 | |
517 // Add some extra DataLayout cells (at least one) to track stray traps. | |
518 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
519 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); | |
520 | |
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521 #ifndef GRAALVM |
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522 // Add a cell to record information about modified arguments. |
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523 int arg_size = method->size_of_parameters(); |
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524 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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525 #endif |
0 | 526 return object_size; |
527 } | |
528 | |
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529 // Compute the size of the MethodData* necessary to store |
0 | 530 // profiling information about a given method. Size is in words |
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531 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
0 | 532 int byte_size = compute_allocation_size_in_bytes(method); |
533 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
534 return align_object_size(word_size); | |
535 } | |
536 | |
537 // Initialize an individual data segment. Returns the size of | |
538 // the segment in bytes. | |
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539 int MethodData::initialize_data(BytecodeStream* stream, |
0 | 540 int data_index) { |
8883 | 541 #if defined(COMPILER1) && !(defined(COMPILER2) || defined(GRAAL)) |
8860 | 542 return 0; |
543 #else | |
0 | 544 int cell_count = -1; |
545 int tag = DataLayout::no_tag; | |
546 DataLayout* data_layout = data_layout_at(data_index); | |
547 Bytecodes::Code c = stream->code(); | |
548 switch (c) { | |
549 case Bytecodes::_checkcast: | |
550 case Bytecodes::_instanceof: | |
551 case Bytecodes::_aastore: | |
552 if (TypeProfileCasts) { | |
553 cell_count = ReceiverTypeData::static_cell_count(); | |
554 tag = DataLayout::receiver_type_data_tag; | |
555 } else { | |
556 cell_count = BitData::static_cell_count(); | |
557 tag = DataLayout::bit_data_tag; | |
558 } | |
559 break; | |
560 case Bytecodes::_invokespecial: | |
561 case Bytecodes::_invokestatic: | |
562 cell_count = CounterData::static_cell_count(); | |
563 tag = DataLayout::counter_data_tag; | |
564 break; | |
565 case Bytecodes::_goto: | |
566 case Bytecodes::_goto_w: | |
567 case Bytecodes::_jsr: | |
568 case Bytecodes::_jsr_w: | |
569 cell_count = JumpData::static_cell_count(); | |
570 tag = DataLayout::jump_data_tag; | |
571 break; | |
572 case Bytecodes::_invokevirtual: | |
573 case Bytecodes::_invokeinterface: | |
574 cell_count = VirtualCallData::static_cell_count(); | |
575 tag = DataLayout::virtual_call_data_tag; | |
576 break; | |
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577 case Bytecodes::_invokedynamic: |
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578 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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579 cell_count = CounterData::static_cell_count(); |
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580 tag = DataLayout::counter_data_tag; |
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581 break; |
0 | 582 case Bytecodes::_ret: |
583 cell_count = RetData::static_cell_count(); | |
584 tag = DataLayout::ret_data_tag; | |
585 break; | |
586 case Bytecodes::_ifeq: | |
587 case Bytecodes::_ifne: | |
588 case Bytecodes::_iflt: | |
589 case Bytecodes::_ifge: | |
590 case Bytecodes::_ifgt: | |
591 case Bytecodes::_ifle: | |
592 case Bytecodes::_if_icmpeq: | |
593 case Bytecodes::_if_icmpne: | |
594 case Bytecodes::_if_icmplt: | |
595 case Bytecodes::_if_icmpge: | |
596 case Bytecodes::_if_icmpgt: | |
597 case Bytecodes::_if_icmple: | |
598 case Bytecodes::_if_acmpeq: | |
599 case Bytecodes::_if_acmpne: | |
600 case Bytecodes::_ifnull: | |
601 case Bytecodes::_ifnonnull: | |
602 cell_count = BranchData::static_cell_count(); | |
603 tag = DataLayout::branch_data_tag; | |
604 break; | |
605 case Bytecodes::_lookupswitch: | |
606 case Bytecodes::_tableswitch: | |
607 cell_count = MultiBranchData::compute_cell_count(stream); | |
608 tag = DataLayout::multi_branch_data_tag; | |
609 break; | |
610 } | |
611 assert(tag == DataLayout::multi_branch_data_tag || | |
612 cell_count == bytecode_cell_count(c), "cell counts must agree"); | |
613 if (cell_count >= 0) { | |
614 assert(tag != DataLayout::no_tag, "bad tag"); | |
615 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
616 data_layout->initialize(tag, stream->bci(), cell_count); | |
617 return DataLayout::compute_size_in_bytes(cell_count); | |
618 } else { | |
619 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
620 return 0; | |
621 } | |
8860 | 622 #endif |
0 | 623 } |
624 | |
625 // Get the data at an arbitrary (sort of) data index. | |
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626 ProfileData* MethodData::data_at(int data_index) const { |
0 | 627 if (out_of_bounds(data_index)) { |
628 return NULL; | |
629 } | |
630 DataLayout* data_layout = data_layout_at(data_index); | |
941 | 631 return data_layout->data_in(); |
632 } | |
0 | 633 |
941 | 634 ProfileData* DataLayout::data_in() { |
635 switch (tag()) { | |
0 | 636 case DataLayout::no_tag: |
637 default: | |
638 ShouldNotReachHere(); | |
639 return NULL; | |
640 case DataLayout::bit_data_tag: | |
941 | 641 return new BitData(this); |
0 | 642 case DataLayout::counter_data_tag: |
941 | 643 return new CounterData(this); |
0 | 644 case DataLayout::jump_data_tag: |
941 | 645 return new JumpData(this); |
0 | 646 case DataLayout::receiver_type_data_tag: |
941 | 647 return new ReceiverTypeData(this); |
0 | 648 case DataLayout::virtual_call_data_tag: |
941 | 649 return new VirtualCallData(this); |
0 | 650 case DataLayout::ret_data_tag: |
941 | 651 return new RetData(this); |
0 | 652 case DataLayout::branch_data_tag: |
941 | 653 return new BranchData(this); |
0 | 654 case DataLayout::multi_branch_data_tag: |
941 | 655 return new MultiBranchData(this); |
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656 case DataLayout::arg_info_data_tag: |
941 | 657 return new ArgInfoData(this); |
0 | 658 }; |
659 } | |
660 | |
661 // Iteration over data. | |
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662 ProfileData* MethodData::next_data(ProfileData* current) const { |
0 | 663 int current_index = dp_to_di(current->dp()); |
664 int next_index = current_index + current->size_in_bytes(); | |
665 ProfileData* next = data_at(next_index); | |
666 return next; | |
667 } | |
668 | |
669 // Give each of the data entries a chance to perform specific | |
670 // data initialization. | |
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671 void MethodData::post_initialize(BytecodeStream* stream) { |
0 | 672 ResourceMark rm; |
673 ProfileData* data; | |
674 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
675 stream->set_start(data->bci()); | |
676 stream->next(); | |
677 data->post_initialize(stream, this); | |
678 } | |
679 } | |
680 | |
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681 // Initialize the MethodData* corresponding to a given method. |
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682 MethodData::MethodData(methodHandle method, int size, TRAPS) { |
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683 // Set the method back-pointer. |
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684 _method = method(); |
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685 initialize(); |
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686 } |
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687 |
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688 void MethodData::initialize() { |
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689 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
0 | 690 ResourceMark rm; |
1783 | 691 |
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692 init(); |
0 | 693 set_creation_mileage(mileage_of(method())); |
694 | |
695 // Go through the bytecodes and allocate and initialize the | |
696 // corresponding data cells. | |
697 int data_size = 0; | |
698 int empty_bc_count = 0; // number of bytecodes lacking data | |
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699 _data[0] = 0; // apparently not set below. |
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700 BytecodeStream stream(method()); |
0 | 701 Bytecodes::Code c; |
702 while ((c = stream.next()) >= 0) { | |
703 int size_in_bytes = initialize_data(&stream, data_size); | |
704 data_size += size_in_bytes; | |
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705 |
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706 if (is_empty_data(size_in_bytes, c)) empty_bc_count += 1; |
0 | 707 } |
708 _data_size = data_size; | |
709 int object_size = in_bytes(data_offset()) + data_size; | |
710 | |
711 // Add some extra DataLayout cells (at least one) to track stray traps. | |
712 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
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713 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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714 object_size += extra_size; |
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715 |
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716 Copy::zero_to_bytes((HeapWord*) extra_data_base(), extra_size); |
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717 |
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718 #ifndef GRAALVM |
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719 // Add a cell to record information about modified arguments. |
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720 // Set up _args_modified array after traps cells so that |
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721 // the code for traps cells works. |
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722 DataLayout *dp = data_layout_at(data_size + extra_size); |
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723 |
8615 | 724 int arg_size = method()->size_of_parameters(); |
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725 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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726 |
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727 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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728 #endif |
0 | 729 |
730 // Set an initial hint. Don't use set_hint_di() because | |
731 // first_di() may be out of bounds if data_size is 0. | |
732 // In that situation, _hint_di is never used, but at | |
733 // least well-defined. | |
734 _hint_di = first_di(); | |
735 | |
736 post_initialize(&stream); | |
737 | |
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738 set_size(object_size); |
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739 } |
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740 |
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741 void MethodData::init() { |
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742 _invocation_counter.init(); |
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743 _backedge_counter.init(); |
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744 _invocation_counter_start = 0; |
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745 _backedge_counter_start = 0; |
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746 _num_loops = 0; |
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747 _num_blocks = 0; |
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748 _highest_comp_level = 0; |
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749 _highest_osr_comp_level = 0; |
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750 _would_profile = true; |
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751 |
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752 // Initialize flags and trap history. |
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753 _nof_decompiles = 0; |
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754 _nof_overflow_recompiles = 0; |
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755 _nof_overflow_traps = 0; |
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756 clear_escape_info(); |
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757 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); |
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758 Copy::zero_to_words((HeapWord*) &_trap_hist, |
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759 sizeof(_trap_hist) / sizeof(HeapWord)); |
0 | 760 } |
761 | |
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762 bool MethodData::is_empty_data(int size_in_bytes, Bytecodes::Code code) { |
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763 #ifdef GRAAL |
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764 return size_in_bytes == 0 && Bytecodes::can_trap(code); |
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765 #else |
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766 return size_in_bytes == 0; |
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767 #endif |
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768 } |
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769 |
0 | 770 // Get a measure of how much mileage the method has on it. |
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771 int MethodData::mileage_of(Method* method) { |
0 | 772 int mileage = 0; |
1783 | 773 if (TieredCompilation) { |
774 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
775 } else { | |
776 int iic = method->interpreter_invocation_count(); | |
777 if (mileage < iic) mileage = iic; | |
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778 MethodCounters* mcs = method->method_counters(); |
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779 if (mcs != NULL) { |
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780 InvocationCounter* ic = mcs->invocation_counter(); |
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781 InvocationCounter* bc = mcs->backedge_counter(); |
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782 int icval = ic->count(); |
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783 if (ic->carry()) icval += CompileThreshold; |
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784 if (mileage < icval) mileage = icval; |
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785 int bcval = bc->count(); |
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786 if (bc->carry()) bcval += CompileThreshold; |
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787 if (mileage < bcval) mileage = bcval; |
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788 } |
1783 | 789 } |
0 | 790 return mileage; |
791 } | |
792 | |
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793 bool MethodData::is_mature() const { |
1783 | 794 return CompilationPolicy::policy()->is_mature(_method); |
0 | 795 } |
796 | |
797 // Translate a bci to its corresponding data index (di). | |
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798 address MethodData::bci_to_dp(int bci) { |
0 | 799 ResourceMark rm; |
800 ProfileData* data = data_before(bci); | |
801 ProfileData* prev = NULL; | |
802 for ( ; is_valid(data); data = next_data(data)) { | |
803 if (data->bci() >= bci) { | |
804 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
805 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
806 return data->dp(); | |
807 } | |
808 prev = data; | |
809 } | |
810 return (address)limit_data_position(); | |
811 } | |
812 | |
813 // Translate a bci to its corresponding data, or NULL. | |
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814 ProfileData* MethodData::bci_to_data(int bci) { |
0 | 815 ProfileData* data = data_before(bci); |
816 for ( ; is_valid(data); data = next_data(data)) { | |
817 if (data->bci() == bci) { | |
818 set_hint_di(dp_to_di(data->dp())); | |
819 return data; | |
820 } else if (data->bci() > bci) { | |
821 break; | |
822 } | |
823 } | |
824 return bci_to_extra_data(bci, false); | |
825 } | |
826 | |
827 // Translate a bci to its corresponding extra data, or NULL. | |
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828 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) { |
0 | 829 DataLayout* dp = extra_data_base(); |
830 DataLayout* end = extra_data_limit(); | |
831 DataLayout* avail = NULL; | |
832 for (; dp < end; dp = next_extra(dp)) { | |
833 // No need for "OrderAccess::load_acquire" ops, | |
834 // since the data structure is monotonic. | |
835 if (dp->tag() == DataLayout::no_tag) break; | |
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836 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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837 dp = end; // ArgInfoData is at the end of extra data section. |
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838 break; |
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839 } |
0 | 840 if (dp->bci() == bci) { |
841 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
842 return new BitData(dp); | |
843 } | |
844 } | |
845 if (create_if_missing && dp < end) { | |
846 // Allocate this one. There is no mutual exclusion, | |
847 // so two threads could allocate different BCIs to the | |
848 // same data layout. This means these extra data | |
849 // records, like most other MDO contents, must not be | |
850 // trusted too much. | |
851 DataLayout temp; | |
852 temp.initialize(DataLayout::bit_data_tag, bci, 0); | |
853 dp->release_set_header(temp.header()); | |
854 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
855 //NO: assert(dp->bci() == bci, "no concurrent allocation"); | |
856 return new BitData(dp); | |
857 } | |
858 return NULL; | |
859 } | |
860 | |
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861 ArgInfoData *MethodData::arg_info() { |
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862 DataLayout* dp = extra_data_base(); |
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863 DataLayout* end = extra_data_limit(); |
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864 for (; dp < end; dp = next_extra(dp)) { |
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865 if (dp->tag() == DataLayout::arg_info_data_tag) |
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866 return new ArgInfoData(dp); |
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867 } |
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868 return NULL; |
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869 } |
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870 |
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871 // Printing |
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872 |
0 | 873 #ifndef PRODUCT |
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874 |
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875 void MethodData::print_on(outputStream* st) const { |
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876 assert(is_methodData(), "should be method data"); |
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877 st->print("method data for "); |
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878 method()->print_value_on(st); |
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879 st->cr(); |
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880 print_data_on(st); |
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881 } |
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882 |
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883 #endif //PRODUCT |
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884 |
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885 void MethodData::print_value_on(outputStream* st) const { |
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886 assert(is_methodData(), "should be method data"); |
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887 st->print("method data for "); |
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888 method()->print_value_on(st); |
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889 } |
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890 |
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891 #ifndef PRODUCT |
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892 void MethodData::print_data_on(outputStream* st) const { |
0 | 893 ResourceMark rm; |
894 ProfileData* data = first_data(); | |
895 for ( ; is_valid(data); data = next_data(data)) { | |
896 st->print("%d", dp_to_di(data->dp())); | |
897 st->fill_to(6); | |
898 data->print_data_on(st); | |
899 } | |
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900 st->print_cr("--- Extra data:"); |
0 | 901 DataLayout* dp = extra_data_base(); |
902 DataLayout* end = extra_data_limit(); | |
903 for (; dp < end; dp = next_extra(dp)) { | |
904 // No need for "OrderAccess::load_acquire" ops, | |
905 // since the data structure is monotonic. | |
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906 if (dp->tag() == DataLayout::no_tag) continue; |
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907 if (dp->tag() == DataLayout::bit_data_tag) { |
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908 data = new BitData(dp); |
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909 } else { |
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910 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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911 data = new ArgInfoData(dp); |
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912 dp = end; // ArgInfoData is at the end of extra data section. |
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913 } |
0 | 914 st->print("%d", dp_to_di(data->dp())); |
915 st->fill_to(6); | |
916 data->print_data_on(st); | |
917 } | |
918 } | |
919 #endif | |
920 | |
7956 | 921 #if INCLUDE_SERVICES |
922 // Size Statistics | |
923 void MethodData::collect_statistics(KlassSizeStats *sz) const { | |
924 int n = sz->count(this); | |
925 sz->_method_data_bytes += n; | |
926 sz->_method_all_bytes += n; | |
927 sz->_rw_bytes += n; | |
928 } | |
929 #endif // INCLUDE_SERVICES | |
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930 |
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931 // Verification |
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932 |
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933 void MethodData::verify_on(outputStream* st) { |
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934 guarantee(is_methodData(), "object must be method data"); |
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935 // guarantee(m->is_perm(), "should be in permspace"); |
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936 this->verify_data_on(st); |
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937 } |
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938 |
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939 void MethodData::verify_data_on(outputStream* st) { |
0 | 940 NEEDS_CLEANUP; |
941 // not yet implemented. | |
942 } |