Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.cpp @ 7666:31540ca73e81
Remove ControlFlowException in SimpleLanguage.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 01 Feb 2013 19:53:52 +0100 |
parents | 5d0bb7d52783 |
children | 5fc51c1ecdeb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "interpreter/bytecode.hpp" | |
28 #include "interpreter/bytecodeStream.hpp" | |
29 #include "interpreter/linkResolver.hpp" | |
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30 #include "oops/methodData.hpp" |
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31 #include "prims/jvmtiRedefineClasses.hpp" |
1972 | 32 #include "runtime/compilationPolicy.hpp" |
33 #include "runtime/deoptimization.hpp" | |
34 #include "runtime/handles.inline.hpp" | |
0 | 35 |
36 // ================================================================== | |
37 // DataLayout | |
38 // | |
39 // Overlay for generic profiling data. | |
40 | |
41 // Some types of data layouts need a length field. | |
42 bool DataLayout::needs_array_len(u1 tag) { | |
45
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43 return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag); |
0 | 44 } |
45 | |
46 // Perform generic initialization of the data. More specific | |
47 // initialization occurs in overrides of ProfileData::post_initialize. | |
48 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { | |
49 _header._bits = (intptr_t)0; | |
50 _header._struct._tag = tag; | |
51 _header._struct._bci = bci; | |
52 for (int i = 0; i < cell_count; i++) { | |
53 set_cell_at(i, (intptr_t)0); | |
54 } | |
55 if (needs_array_len(tag)) { | |
56 set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. | |
57 } | |
58 } | |
59 | |
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60 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) { |
941 | 61 ResourceMark m; |
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62 data_in()->clean_weak_klass_links(cl); |
941 | 63 } |
64 | |
65 | |
0 | 66 // ================================================================== |
67 // ProfileData | |
68 // | |
69 // A ProfileData object is created to refer to a section of profiling | |
70 // data in a structured way. | |
71 | |
72 // Constructor for invalid ProfileData. | |
73 ProfileData::ProfileData() { | |
74 _data = NULL; | |
75 } | |
76 | |
77 #ifndef PRODUCT | |
78 void ProfileData::print_shared(outputStream* st, const char* name) { | |
79 st->print("bci: %d", bci()); | |
80 st->fill_to(tab_width_one); | |
81 st->print("%s", name); | |
82 tab(st); | |
83 int trap = trap_state(); | |
84 if (trap != 0) { | |
85 char buf[100]; | |
86 st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); | |
87 } | |
88 int flags = data()->flags(); | |
89 if (flags != 0) | |
90 st->print("flags(%d) ", flags); | |
91 } | |
92 | |
93 void ProfileData::tab(outputStream* st) { | |
94 st->fill_to(tab_width_two); | |
95 } | |
96 #endif // !PRODUCT | |
97 | |
98 // ================================================================== | |
99 // BitData | |
100 // | |
101 // A BitData corresponds to a one-bit flag. This is used to indicate | |
102 // whether a checkcast bytecode has seen a null value. | |
103 | |
104 | |
105 #ifndef PRODUCT | |
106 void BitData::print_data_on(outputStream* st) { | |
107 print_shared(st, "BitData"); | |
108 } | |
109 #endif // !PRODUCT | |
110 | |
111 // ================================================================== | |
112 // CounterData | |
113 // | |
114 // A CounterData corresponds to a simple counter. | |
115 | |
116 #ifndef PRODUCT | |
117 void CounterData::print_data_on(outputStream* st) { | |
118 print_shared(st, "CounterData"); | |
119 st->print_cr("count(%u)", count()); | |
120 } | |
121 #endif // !PRODUCT | |
122 | |
123 // ================================================================== | |
124 // JumpData | |
125 // | |
126 // A JumpData is used to access profiling information for a direct | |
127 // branch. It is a counter, used for counting the number of branches, | |
128 // plus a data displacement, used for realigning the data pointer to | |
129 // the corresponding target bci. | |
130 | |
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131 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 132 assert(stream->bci() == bci(), "wrong pos"); |
133 int target; | |
134 Bytecodes::Code c = stream->code(); | |
135 if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { | |
136 target = stream->dest_w(); | |
137 } else { | |
138 target = stream->dest(); | |
139 } | |
140 int my_di = mdo->dp_to_di(dp()); | |
141 int target_di = mdo->bci_to_di(target); | |
142 int offset = target_di - my_di; | |
143 set_displacement(offset); | |
144 } | |
145 | |
146 #ifndef PRODUCT | |
147 void JumpData::print_data_on(outputStream* st) { | |
148 print_shared(st, "JumpData"); | |
149 st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); | |
150 } | |
151 #endif // !PRODUCT | |
152 | |
153 // ================================================================== | |
154 // ReceiverTypeData | |
155 // | |
156 // A ReceiverTypeData is used to access profiling information about a | |
157 // dynamic type check. It consists of a counter which counts the total times | |
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158 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 159 // which are used to store a type profile for the receiver of the check. |
160 | |
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161 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
941 | 162 for (uint row = 0; row < row_limit(); row++) { |
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163 Klass* p = receiver(row); |
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164 if (p != NULL && !p->is_loader_alive(is_alive_cl)) { |
941 | 165 clear_row(row); |
166 } | |
167 } | |
168 } | |
169 | |
0 | 170 #ifndef PRODUCT |
171 void ReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
172 uint row; | |
173 int entries = 0; | |
174 for (row = 0; row < row_limit(); row++) { | |
175 if (receiver(row) != NULL) entries++; | |
176 } | |
177 st->print_cr("count(%u) entries(%u)", count(), entries); | |
1783 | 178 int total = count(); |
179 for (row = 0; row < row_limit(); row++) { | |
180 if (receiver(row) != NULL) { | |
181 total += receiver_count(row); | |
182 } | |
183 } | |
0 | 184 for (row = 0; row < row_limit(); row++) { |
185 if (receiver(row) != NULL) { | |
186 tab(st); | |
187 receiver(row)->print_value_on(st); | |
1783 | 188 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
0 | 189 } |
190 } | |
191 } | |
192 void ReceiverTypeData::print_data_on(outputStream* st) { | |
193 print_shared(st, "ReceiverTypeData"); | |
194 print_receiver_data_on(st); | |
195 } | |
196 void VirtualCallData::print_data_on(outputStream* st) { | |
197 print_shared(st, "VirtualCallData"); | |
198 print_receiver_data_on(st); | |
199 } | |
200 #endif // !PRODUCT | |
201 | |
202 // ================================================================== | |
203 // RetData | |
204 // | |
205 // A RetData is used to access profiling information for a ret bytecode. | |
206 // It is composed of a count of the number of times that the ret has | |
207 // been executed, followed by a series of triples of the form | |
208 // (bci, count, di) which count the number of times that some bci was the | |
209 // target of the ret and cache a corresponding displacement. | |
210 | |
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211 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 212 for (uint row = 0; row < row_limit(); row++) { |
213 set_bci_displacement(row, -1); | |
214 set_bci(row, no_bci); | |
215 } | |
216 // release so other threads see a consistent state. bci is used as | |
217 // a valid flag for bci_displacement. | |
218 OrderAccess::release(); | |
219 } | |
220 | |
221 // This routine needs to atomically update the RetData structure, so the | |
222 // caller needs to hold the RetData_lock before it gets here. Since taking | |
223 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
224 // wrapper around a derived oop, taking the lock in _this_ method will | |
225 // basically cause the 'this' pointer's _data field to contain junk after the | |
226 // lock. We require the caller to take the lock before making the ProfileData | |
227 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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228 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
0 | 229 // First find the mdp which corresponds to the return bci. |
230 address mdp = h_mdo->bci_to_dp(return_bci); | |
231 | |
232 // Now check to see if any of the cache slots are open. | |
233 for (uint row = 0; row < row_limit(); row++) { | |
234 if (bci(row) == no_bci) { | |
235 set_bci_displacement(row, mdp - dp()); | |
236 set_bci_count(row, DataLayout::counter_increment); | |
237 // Barrier to ensure displacement is written before the bci; allows | |
238 // the interpreter to read displacement without fear of race condition. | |
239 release_set_bci(row, return_bci); | |
240 break; | |
241 } | |
242 } | |
243 return mdp; | |
244 } | |
245 | |
246 | |
247 #ifndef PRODUCT | |
248 void RetData::print_data_on(outputStream* st) { | |
249 print_shared(st, "RetData"); | |
250 uint row; | |
251 int entries = 0; | |
252 for (row = 0; row < row_limit(); row++) { | |
253 if (bci(row) != no_bci) entries++; | |
254 } | |
255 st->print_cr("count(%u) entries(%u)", count(), entries); | |
256 for (row = 0; row < row_limit(); row++) { | |
257 if (bci(row) != no_bci) { | |
258 tab(st); | |
259 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
260 bci(row), bci_count(row), bci_displacement(row)); | |
261 } | |
262 } | |
263 } | |
264 #endif // !PRODUCT | |
265 | |
266 // ================================================================== | |
267 // BranchData | |
268 // | |
269 // A BranchData is used to access profiling data for a two-way branch. | |
270 // It consists of taken and not_taken counts as well as a data displacement | |
271 // for the taken case. | |
272 | |
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273 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 274 assert(stream->bci() == bci(), "wrong pos"); |
275 int target = stream->dest(); | |
276 int my_di = mdo->dp_to_di(dp()); | |
277 int target_di = mdo->bci_to_di(target); | |
278 int offset = target_di - my_di; | |
279 set_displacement(offset); | |
280 } | |
281 | |
282 #ifndef PRODUCT | |
283 void BranchData::print_data_on(outputStream* st) { | |
284 print_shared(st, "BranchData"); | |
285 st->print_cr("taken(%u) displacement(%d)", | |
286 taken(), displacement()); | |
287 tab(st); | |
288 st->print_cr("not taken(%u)", not_taken()); | |
289 } | |
290 #endif | |
291 | |
292 // ================================================================== | |
293 // MultiBranchData | |
294 // | |
295 // A MultiBranchData is used to access profiling information for | |
296 // a multi-way branch (*switch bytecodes). It consists of a series | |
297 // of (count, displacement) pairs, which count the number of times each | |
298 // case was taken and specify the data displacment for each branch target. | |
299 | |
300 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
301 int cell_count = 0; | |
302 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 303 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
304 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
0 | 305 } else { |
2142 | 306 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
307 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
0 | 308 } |
309 return cell_count; | |
310 } | |
311 | |
312 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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313 MethodData* mdo) { |
0 | 314 assert(stream->bci() == bci(), "wrong pos"); |
315 int target; | |
316 int my_di; | |
317 int target_di; | |
318 int offset; | |
319 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 320 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
321 int len = sw.length(); | |
0 | 322 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
323 for (int count = 0; count < len; count++) { | |
2142 | 324 target = sw.dest_offset_at(count) + bci(); |
0 | 325 my_di = mdo->dp_to_di(dp()); |
326 target_di = mdo->bci_to_di(target); | |
327 offset = target_di - my_di; | |
328 set_displacement_at(count, offset); | |
329 } | |
2142 | 330 target = sw.default_offset() + bci(); |
0 | 331 my_di = mdo->dp_to_di(dp()); |
332 target_di = mdo->bci_to_di(target); | |
333 offset = target_di - my_di; | |
334 set_default_displacement(offset); | |
335 | |
336 } else { | |
2142 | 337 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
338 int npairs = sw.number_of_pairs(); | |
0 | 339 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
340 for (int count = 0; count < npairs; count++) { | |
2142 | 341 LookupswitchPair pair = sw.pair_at(count); |
342 target = pair.offset() + bci(); | |
0 | 343 my_di = mdo->dp_to_di(dp()); |
344 target_di = mdo->bci_to_di(target); | |
345 offset = target_di - my_di; | |
346 set_displacement_at(count, offset); | |
347 } | |
2142 | 348 target = sw.default_offset() + bci(); |
0 | 349 my_di = mdo->dp_to_di(dp()); |
350 target_di = mdo->bci_to_di(target); | |
351 offset = target_di - my_di; | |
352 set_default_displacement(offset); | |
353 } | |
354 } | |
355 | |
356 #ifndef PRODUCT | |
357 void MultiBranchData::print_data_on(outputStream* st) { | |
358 print_shared(st, "MultiBranchData"); | |
359 st->print_cr("default_count(%u) displacement(%d)", | |
360 default_count(), default_displacement()); | |
361 int cases = number_of_cases(); | |
362 for (int i = 0; i < cases; i++) { | |
363 tab(st); | |
364 st->print_cr("count(%u) displacement(%d)", | |
365 count_at(i), displacement_at(i)); | |
366 } | |
367 } | |
368 #endif | |
369 | |
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370 #ifndef PRODUCT |
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371 void ArgInfoData::print_data_on(outputStream* st) { |
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372 print_shared(st, "ArgInfoData"); |
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373 int nargs = number_of_args(); |
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374 for (int i = 0; i < nargs; i++) { |
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375 st->print(" 0x%x", arg_modified(i)); |
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376 } |
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377 st->cr(); |
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378 } |
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379 |
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380 #endif |
0 | 381 // ================================================================== |
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382 // MethodData* |
0 | 383 // |
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384 // A MethodData* holds information which has been collected about |
0 | 385 // a method. |
386 | |
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387 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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388 int size = MethodData::compute_allocation_size_in_words(method); |
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389 |
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390 return new (loader_data, size, false, THREAD) MethodData(method(), size, CHECK_NULL); |
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391 } |
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392 |
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393 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
0 | 394 switch (code) { |
395 case Bytecodes::_checkcast: | |
396 case Bytecodes::_instanceof: | |
397 case Bytecodes::_aastore: | |
398 if (TypeProfileCasts) { | |
399 return ReceiverTypeData::static_cell_count(); | |
400 } else { | |
401 return BitData::static_cell_count(); | |
402 } | |
403 case Bytecodes::_invokespecial: | |
404 case Bytecodes::_invokestatic: | |
405 return CounterData::static_cell_count(); | |
406 case Bytecodes::_goto: | |
407 case Bytecodes::_goto_w: | |
408 case Bytecodes::_jsr: | |
409 case Bytecodes::_jsr_w: | |
410 return JumpData::static_cell_count(); | |
411 case Bytecodes::_invokevirtual: | |
412 case Bytecodes::_invokeinterface: | |
413 return VirtualCallData::static_cell_count(); | |
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414 case Bytecodes::_invokedynamic: |
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415 return CounterData::static_cell_count(); |
0 | 416 case Bytecodes::_ret: |
417 return RetData::static_cell_count(); | |
418 case Bytecodes::_ifeq: | |
419 case Bytecodes::_ifne: | |
420 case Bytecodes::_iflt: | |
421 case Bytecodes::_ifge: | |
422 case Bytecodes::_ifgt: | |
423 case Bytecodes::_ifle: | |
424 case Bytecodes::_if_icmpeq: | |
425 case Bytecodes::_if_icmpne: | |
426 case Bytecodes::_if_icmplt: | |
427 case Bytecodes::_if_icmpge: | |
428 case Bytecodes::_if_icmpgt: | |
429 case Bytecodes::_if_icmple: | |
430 case Bytecodes::_if_acmpeq: | |
431 case Bytecodes::_if_acmpne: | |
432 case Bytecodes::_ifnull: | |
433 case Bytecodes::_ifnonnull: | |
434 return BranchData::static_cell_count(); | |
435 case Bytecodes::_lookupswitch: | |
436 case Bytecodes::_tableswitch: | |
437 return variable_cell_count; | |
438 } | |
439 return no_profile_data; | |
440 } | |
441 | |
442 // Compute the size of the profiling information corresponding to | |
443 // the current bytecode. | |
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444 int MethodData::compute_data_size(BytecodeStream* stream) { |
0 | 445 int cell_count = bytecode_cell_count(stream->code()); |
446 if (cell_count == no_profile_data) { | |
447 return 0; | |
448 } | |
449 if (cell_count == variable_cell_count) { | |
450 cell_count = MultiBranchData::compute_cell_count(stream); | |
451 } | |
452 // Note: cell_count might be zero, meaning that there is just | |
453 // a DataLayout header, with no extra cells. | |
454 assert(cell_count >= 0, "sanity"); | |
455 return DataLayout::compute_size_in_bytes(cell_count); | |
456 } | |
457 | |
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458 #ifdef GRAALVM |
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459 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
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460 if (!ProfileTraps) return 0; |
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461 |
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462 // Assume that up to 30% of the possibly trapping BCIs with no MDP will need to allocate one. |
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463 return MIN2(empty_bc_count, MAX2(4, (empty_bc_count * 30) / 100)); |
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464 } |
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465 #else |
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466 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count) { |
0 | 467 if (ProfileTraps) { |
468 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
469 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
470 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
471 int one_percent_of_data | |
472 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
473 if (extra_data_count < one_percent_of_data) | |
474 extra_data_count = one_percent_of_data; | |
475 if (extra_data_count > empty_bc_count) | |
476 extra_data_count = empty_bc_count; // no need for more | |
477 return extra_data_count; | |
478 } else { | |
479 return 0; | |
480 } | |
481 } | |
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482 #endif |
0 | 483 |
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484 // Compute the size of the MethodData* necessary to store |
0 | 485 // profiling information about a given method. Size is in bytes. |
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486 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
0 | 487 int data_size = 0; |
488 BytecodeStream stream(method); | |
489 Bytecodes::Code c; | |
490 int empty_bc_count = 0; // number of bytecodes lacking data | |
491 while ((c = stream.next()) >= 0) { | |
492 int size_in_bytes = compute_data_size(&stream); | |
493 data_size += size_in_bytes; | |
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494 |
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495 if (is_empty_data(size_in_bytes, c)) empty_bc_count++; |
0 | 496 } |
497 int object_size = in_bytes(data_offset()) + data_size; | |
498 | |
499 // Add some extra DataLayout cells (at least one) to track stray traps. | |
500 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
501 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); | |
502 | |
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503 #ifndef GRAALVM |
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504 // Add a cell to record information about modified arguments. |
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505 int arg_size = method->size_of_parameters(); |
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506 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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507 #endif |
0 | 508 return object_size; |
509 } | |
510 | |
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511 // Compute the size of the MethodData* necessary to store |
0 | 512 // profiling information about a given method. Size is in words |
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513 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
0 | 514 int byte_size = compute_allocation_size_in_bytes(method); |
515 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
516 return align_object_size(word_size); | |
517 } | |
518 | |
519 // Initialize an individual data segment. Returns the size of | |
520 // the segment in bytes. | |
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521 int MethodData::initialize_data(BytecodeStream* stream, |
0 | 522 int data_index) { |
523 int cell_count = -1; | |
524 int tag = DataLayout::no_tag; | |
525 DataLayout* data_layout = data_layout_at(data_index); | |
526 Bytecodes::Code c = stream->code(); | |
527 switch (c) { | |
528 case Bytecodes::_checkcast: | |
529 case Bytecodes::_instanceof: | |
530 case Bytecodes::_aastore: | |
531 if (TypeProfileCasts) { | |
532 cell_count = ReceiverTypeData::static_cell_count(); | |
533 tag = DataLayout::receiver_type_data_tag; | |
534 } else { | |
535 cell_count = BitData::static_cell_count(); | |
536 tag = DataLayout::bit_data_tag; | |
537 } | |
538 break; | |
539 case Bytecodes::_invokespecial: | |
540 case Bytecodes::_invokestatic: | |
541 cell_count = CounterData::static_cell_count(); | |
542 tag = DataLayout::counter_data_tag; | |
543 break; | |
544 case Bytecodes::_goto: | |
545 case Bytecodes::_goto_w: | |
546 case Bytecodes::_jsr: | |
547 case Bytecodes::_jsr_w: | |
548 cell_count = JumpData::static_cell_count(); | |
549 tag = DataLayout::jump_data_tag; | |
550 break; | |
551 case Bytecodes::_invokevirtual: | |
552 case Bytecodes::_invokeinterface: | |
553 cell_count = VirtualCallData::static_cell_count(); | |
554 tag = DataLayout::virtual_call_data_tag; | |
555 break; | |
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556 case Bytecodes::_invokedynamic: |
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557 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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558 cell_count = CounterData::static_cell_count(); |
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559 tag = DataLayout::counter_data_tag; |
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560 break; |
0 | 561 case Bytecodes::_ret: |
562 cell_count = RetData::static_cell_count(); | |
563 tag = DataLayout::ret_data_tag; | |
564 break; | |
565 case Bytecodes::_ifeq: | |
566 case Bytecodes::_ifne: | |
567 case Bytecodes::_iflt: | |
568 case Bytecodes::_ifge: | |
569 case Bytecodes::_ifgt: | |
570 case Bytecodes::_ifle: | |
571 case Bytecodes::_if_icmpeq: | |
572 case Bytecodes::_if_icmpne: | |
573 case Bytecodes::_if_icmplt: | |
574 case Bytecodes::_if_icmpge: | |
575 case Bytecodes::_if_icmpgt: | |
576 case Bytecodes::_if_icmple: | |
577 case Bytecodes::_if_acmpeq: | |
578 case Bytecodes::_if_acmpne: | |
579 case Bytecodes::_ifnull: | |
580 case Bytecodes::_ifnonnull: | |
581 cell_count = BranchData::static_cell_count(); | |
582 tag = DataLayout::branch_data_tag; | |
583 break; | |
584 case Bytecodes::_lookupswitch: | |
585 case Bytecodes::_tableswitch: | |
586 cell_count = MultiBranchData::compute_cell_count(stream); | |
587 tag = DataLayout::multi_branch_data_tag; | |
588 break; | |
589 } | |
590 assert(tag == DataLayout::multi_branch_data_tag || | |
591 cell_count == bytecode_cell_count(c), "cell counts must agree"); | |
592 if (cell_count >= 0) { | |
593 assert(tag != DataLayout::no_tag, "bad tag"); | |
594 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
595 data_layout->initialize(tag, stream->bci(), cell_count); | |
596 return DataLayout::compute_size_in_bytes(cell_count); | |
597 } else { | |
598 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
599 return 0; | |
600 } | |
601 } | |
602 | |
603 // Get the data at an arbitrary (sort of) data index. | |
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604 ProfileData* MethodData::data_at(int data_index) const { |
0 | 605 if (out_of_bounds(data_index)) { |
606 return NULL; | |
607 } | |
608 DataLayout* data_layout = data_layout_at(data_index); | |
941 | 609 return data_layout->data_in(); |
610 } | |
0 | 611 |
941 | 612 ProfileData* DataLayout::data_in() { |
613 switch (tag()) { | |
0 | 614 case DataLayout::no_tag: |
615 default: | |
616 ShouldNotReachHere(); | |
617 return NULL; | |
618 case DataLayout::bit_data_tag: | |
941 | 619 return new BitData(this); |
0 | 620 case DataLayout::counter_data_tag: |
941 | 621 return new CounterData(this); |
0 | 622 case DataLayout::jump_data_tag: |
941 | 623 return new JumpData(this); |
0 | 624 case DataLayout::receiver_type_data_tag: |
941 | 625 return new ReceiverTypeData(this); |
0 | 626 case DataLayout::virtual_call_data_tag: |
941 | 627 return new VirtualCallData(this); |
0 | 628 case DataLayout::ret_data_tag: |
941 | 629 return new RetData(this); |
0 | 630 case DataLayout::branch_data_tag: |
941 | 631 return new BranchData(this); |
0 | 632 case DataLayout::multi_branch_data_tag: |
941 | 633 return new MultiBranchData(this); |
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634 case DataLayout::arg_info_data_tag: |
941 | 635 return new ArgInfoData(this); |
0 | 636 }; |
637 } | |
638 | |
639 // Iteration over data. | |
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640 ProfileData* MethodData::next_data(ProfileData* current) const { |
0 | 641 int current_index = dp_to_di(current->dp()); |
642 int next_index = current_index + current->size_in_bytes(); | |
643 ProfileData* next = data_at(next_index); | |
644 return next; | |
645 } | |
646 | |
647 // Give each of the data entries a chance to perform specific | |
648 // data initialization. | |
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649 void MethodData::post_initialize(BytecodeStream* stream) { |
0 | 650 ResourceMark rm; |
651 ProfileData* data; | |
652 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
653 stream->set_start(data->bci()); | |
654 stream->next(); | |
655 data->post_initialize(stream, this); | |
656 } | |
657 } | |
658 | |
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659 // Initialize the MethodData* corresponding to a given method. |
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660 MethodData::MethodData(methodHandle method, int size, TRAPS) { |
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661 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
0 | 662 ResourceMark rm; |
663 // Set the method back-pointer. | |
664 _method = method(); | |
1783 | 665 |
666 if (TieredCompilation) { | |
667 _invocation_counter.init(); | |
668 _backedge_counter.init(); | |
2252 | 669 _invocation_counter_start = 0; |
670 _backedge_counter_start = 0; | |
1783 | 671 _num_loops = 0; |
672 _num_blocks = 0; | |
673 _highest_comp_level = 0; | |
674 _highest_osr_comp_level = 0; | |
2252 | 675 _would_profile = true; |
1783 | 676 } |
0 | 677 set_creation_mileage(mileage_of(method())); |
678 | |
679 // Initialize flags and trap history. | |
680 _nof_decompiles = 0; | |
681 _nof_overflow_recompiles = 0; | |
682 _nof_overflow_traps = 0; | |
683 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); | |
684 Copy::zero_to_words((HeapWord*) &_trap_hist, | |
685 sizeof(_trap_hist) / sizeof(HeapWord)); | |
686 | |
687 // Go through the bytecodes and allocate and initialize the | |
688 // corresponding data cells. | |
689 int data_size = 0; | |
690 int empty_bc_count = 0; // number of bytecodes lacking data | |
691 BytecodeStream stream(method); | |
692 Bytecodes::Code c; | |
693 while ((c = stream.next()) >= 0) { | |
694 int size_in_bytes = initialize_data(&stream, data_size); | |
695 data_size += size_in_bytes; | |
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696 |
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697 if (is_empty_data(size_in_bytes, c)) empty_bc_count++; |
0 | 698 } |
699 _data_size = data_size; | |
700 int object_size = in_bytes(data_offset()) + data_size; | |
701 | |
702 // Add some extra DataLayout cells (at least one) to track stray traps. | |
703 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count); | |
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704 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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705 object_size += extra_size; |
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706 |
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707 #ifndef GRAALVM |
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708 // Add a cell to record information about modified arguments. |
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709 // Set up _args_modified array after traps cells so that |
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710 // the code for traps cells works. |
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711 DataLayout *dp = data_layout_at(data_size + extra_size); |
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712 |
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713 int arg_size = method->size_of_parameters(); |
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714 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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715 |
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716 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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717 #endif |
0 | 718 |
719 // Set an initial hint. Don't use set_hint_di() because | |
720 // first_di() may be out of bounds if data_size is 0. | |
721 // In that situation, _hint_di is never used, but at | |
722 // least well-defined. | |
723 _hint_di = first_di(); | |
724 | |
725 post_initialize(&stream); | |
726 | |
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727 set_size(object_size); |
0 | 728 } |
729 | |
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730 bool MethodData::is_empty_data(int size_in_bytes, Bytecodes::Code code) { |
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731 #ifdef GRAALVM |
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732 return size_in_bytes == 0 && Bytecodes::can_trap(code); |
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733 #else |
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734 return size_in_bytes == 0; |
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735 #endif |
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736 } |
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737 |
0 | 738 // Get a measure of how much mileage the method has on it. |
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739 int MethodData::mileage_of(Method* method) { |
0 | 740 int mileage = 0; |
1783 | 741 if (TieredCompilation) { |
742 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
743 } else { | |
744 int iic = method->interpreter_invocation_count(); | |
745 if (mileage < iic) mileage = iic; | |
746 InvocationCounter* ic = method->invocation_counter(); | |
747 InvocationCounter* bc = method->backedge_counter(); | |
748 int icval = ic->count(); | |
749 if (ic->carry()) icval += CompileThreshold; | |
750 if (mileage < icval) mileage = icval; | |
751 int bcval = bc->count(); | |
752 if (bc->carry()) bcval += CompileThreshold; | |
753 if (mileage < bcval) mileage = bcval; | |
754 } | |
0 | 755 return mileage; |
756 } | |
757 | |
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758 bool MethodData::is_mature() const { |
1783 | 759 return CompilationPolicy::policy()->is_mature(_method); |
0 | 760 } |
761 | |
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762 void MethodData::inc_decompile_count() { |
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763 _nof_decompiles += 1; |
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764 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
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765 method()->set_not_compilable(CompLevel_full_optimization); |
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766 } |
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767 } |
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768 |
0 | 769 // Translate a bci to its corresponding data index (di). |
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770 address MethodData::bci_to_dp(int bci) { |
0 | 771 ResourceMark rm; |
772 ProfileData* data = data_before(bci); | |
773 ProfileData* prev = NULL; | |
774 for ( ; is_valid(data); data = next_data(data)) { | |
775 if (data->bci() >= bci) { | |
776 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
777 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
778 return data->dp(); | |
779 } | |
780 prev = data; | |
781 } | |
782 return (address)limit_data_position(); | |
783 } | |
784 | |
785 // Translate a bci to its corresponding data, or NULL. | |
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786 ProfileData* MethodData::bci_to_data(int bci) { |
0 | 787 ProfileData* data = data_before(bci); |
788 for ( ; is_valid(data); data = next_data(data)) { | |
789 if (data->bci() == bci) { | |
790 set_hint_di(dp_to_di(data->dp())); | |
791 return data; | |
792 } else if (data->bci() > bci) { | |
793 break; | |
794 } | |
795 } | |
796 return bci_to_extra_data(bci, false); | |
797 } | |
798 | |
799 // Translate a bci to its corresponding extra data, or NULL. | |
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800 ProfileData* MethodData::bci_to_extra_data(int bci, bool create_if_missing) { |
0 | 801 DataLayout* dp = extra_data_base(); |
802 DataLayout* end = extra_data_limit(); | |
803 DataLayout* avail = NULL; | |
804 for (; dp < end; dp = next_extra(dp)) { | |
805 // No need for "OrderAccess::load_acquire" ops, | |
806 // since the data structure is monotonic. | |
807 if (dp->tag() == DataLayout::no_tag) break; | |
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808 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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809 dp = end; // ArgInfoData is at the end of extra data section. |
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810 break; |
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811 } |
0 | 812 if (dp->bci() == bci) { |
813 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
814 return new BitData(dp); | |
815 } | |
816 } | |
817 if (create_if_missing && dp < end) { | |
818 // Allocate this one. There is no mutual exclusion, | |
819 // so two threads could allocate different BCIs to the | |
820 // same data layout. This means these extra data | |
821 // records, like most other MDO contents, must not be | |
822 // trusted too much. | |
823 DataLayout temp; | |
824 temp.initialize(DataLayout::bit_data_tag, bci, 0); | |
825 dp->release_set_header(temp.header()); | |
826 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
827 //NO: assert(dp->bci() == bci, "no concurrent allocation"); | |
828 return new BitData(dp); | |
829 } | |
830 return NULL; | |
831 } | |
832 | |
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833 ArgInfoData *MethodData::arg_info() { |
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834 DataLayout* dp = extra_data_base(); |
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835 DataLayout* end = extra_data_limit(); |
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836 for (; dp < end; dp = next_extra(dp)) { |
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837 if (dp->tag() == DataLayout::arg_info_data_tag) |
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838 return new ArgInfoData(dp); |
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839 } |
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840 return NULL; |
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841 } |
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842 |
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843 // Printing |
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844 |
0 | 845 #ifndef PRODUCT |
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846 |
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847 void MethodData::print_on(outputStream* st) const { |
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848 assert(is_methodData(), "should be method data"); |
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849 st->print("method data for "); |
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850 method()->print_value_on(st); |
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851 st->cr(); |
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852 print_data_on(st); |
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853 } |
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854 |
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855 #endif //PRODUCT |
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856 |
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857 void MethodData::print_value_on(outputStream* st) const { |
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858 assert(is_methodData(), "should be method data"); |
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859 st->print("method data for "); |
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860 method()->print_value_on(st); |
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861 } |
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862 |
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863 #ifndef PRODUCT |
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864 void MethodData::print_data_on(outputStream* st) const { |
0 | 865 ResourceMark rm; |
866 ProfileData* data = first_data(); | |
867 for ( ; is_valid(data); data = next_data(data)) { | |
868 st->print("%d", dp_to_di(data->dp())); | |
869 st->fill_to(6); | |
870 data->print_data_on(st); | |
871 } | |
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872 st->print_cr("--- Extra data:"); |
0 | 873 DataLayout* dp = extra_data_base(); |
874 DataLayout* end = extra_data_limit(); | |
875 for (; dp < end; dp = next_extra(dp)) { | |
876 // No need for "OrderAccess::load_acquire" ops, | |
877 // since the data structure is monotonic. | |
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878 if (dp->tag() == DataLayout::no_tag) continue; |
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879 if (dp->tag() == DataLayout::bit_data_tag) { |
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880 data = new BitData(dp); |
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881 } else { |
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882 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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883 data = new ArgInfoData(dp); |
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884 dp = end; // ArgInfoData is at the end of extra data section. |
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885 } |
0 | 886 st->print("%d", dp_to_di(data->dp())); |
887 st->fill_to(6); | |
888 data->print_data_on(st); | |
889 } | |
890 } | |
891 #endif | |
892 | |
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893 |
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894 // Verification |
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895 |
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896 void MethodData::verify_on(outputStream* st) { |
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897 guarantee(is_methodData(), "object must be method data"); |
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898 // guarantee(m->is_perm(), "should be in permspace"); |
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899 this->verify_data_on(st); |
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900 } |
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901 |
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902 void MethodData::verify_data_on(outputStream* st) { |
0 | 903 NEEDS_CLEANUP; |
904 // not yet implemented. | |
905 } |