Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciMethodData.cpp @ 250:6ca61c728c2d
6712835: Server compiler fails with assertion (loop_count < K,"infinite loop in PhaseIterGVN::transform")
Reviewed-by: kvn
author | never |
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date | Fri, 25 Jul 2008 11:32:56 -0700 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 2001-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_ciMethodData.cpp.incl" | |
27 | |
28 // ciMethodData | |
29 | |
30 // ------------------------------------------------------------------ | |
31 // ciMethodData::ciMethodData | |
32 // | |
33 ciMethodData::ciMethodData(methodDataHandle h_md) : ciObject(h_md) { | |
34 assert(h_md() != NULL, "no null method data"); | |
35 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); | |
36 _data = NULL; | |
37 _data_size = 0; | |
38 _extra_data_size = 0; | |
39 _current_mileage = 0; | |
40 _state = empty_state; | |
41 _saw_free_extra_data = false; | |
42 // Set an initial hint. Don't use set_hint_di() because | |
43 // first_di() may be out of bounds if data_size is 0. | |
44 _hint_di = first_di(); | |
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45 // Initialize the escape information (to "don't know."); |
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46 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 47 } |
48 | |
49 // ------------------------------------------------------------------ | |
50 // ciMethodData::ciMethodData | |
51 // | |
52 // No methodDataOop. | |
53 ciMethodData::ciMethodData() : ciObject() { | |
54 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); | |
55 _data = NULL; | |
56 _data_size = 0; | |
57 _extra_data_size = 0; | |
58 _current_mileage = 0; | |
59 _state = empty_state; | |
60 _saw_free_extra_data = false; | |
61 // Set an initial hint. Don't use set_hint_di() because | |
62 // first_di() may be out of bounds if data_size is 0. | |
63 _hint_di = first_di(); | |
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64 // Initialize the escape information (to "don't know."); |
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65 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 66 } |
67 | |
68 void ciMethodData::load_data() { | |
69 methodDataOop mdo = get_methodDataOop(); | |
70 if (mdo == NULL) return; | |
71 | |
72 // To do: don't copy the data if it is not "ripe" -- require a minimum # | |
73 // of invocations. | |
74 | |
75 // Snapshot the data -- actually, take an approximate snapshot of | |
76 // the data. Any concurrently executing threads may be changing the | |
77 // data as we copy it. | |
78 int skip_header = oopDesc::header_size(); | |
79 Copy::disjoint_words((HeapWord*) mdo + skip_header, | |
80 (HeapWord*) &_orig + skip_header, | |
81 sizeof(_orig) / HeapWordSize - skip_header); | |
82 DEBUG_ONLY(*_orig.adr_method() = NULL); // no dangling oops, please | |
83 Arena* arena = CURRENT_ENV->arena(); | |
84 _data_size = mdo->data_size(); | |
85 _extra_data_size = mdo->extra_data_size(); | |
86 int total_size = _data_size + _extra_data_size; | |
87 _data = (intptr_t *) arena->Amalloc(total_size); | |
88 Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize); | |
89 | |
90 // Traverse the profile data, translating any oops into their | |
91 // ci equivalents. | |
92 ResourceMark rm; | |
93 ciProfileData* ci_data = first_data(); | |
94 ProfileData* data = mdo->first_data(); | |
95 while (is_valid(ci_data)) { | |
96 ci_data->translate_from(data); | |
97 ci_data = next_data(ci_data); | |
98 data = mdo->next_data(data); | |
99 } | |
100 // Note: Extra data are all BitData, and do not need translation. | |
101 _current_mileage = methodDataOopDesc::mileage_of(mdo->method()); | |
102 _state = mdo->is_mature()? mature_state: immature_state; | |
103 | |
104 _eflags = mdo->eflags(); | |
105 _arg_local = mdo->arg_local(); | |
106 _arg_stack = mdo->arg_stack(); | |
107 _arg_returned = mdo->arg_returned(); | |
108 } | |
109 | |
110 void ciReceiverTypeData::translate_receiver_data_from(ProfileData* data) { | |
111 for (uint row = 0; row < row_limit(); row++) { | |
112 klassOop k = data->as_ReceiverTypeData()->receiver(row); | |
113 if (k != NULL) { | |
114 ciKlass* klass = CURRENT_ENV->get_object(k)->as_klass(); | |
115 set_receiver(row, klass); | |
116 } | |
117 } | |
118 } | |
119 | |
120 | |
121 // Get the data at an arbitrary (sort of) data index. | |
122 ciProfileData* ciMethodData::data_at(int data_index) { | |
123 if (out_of_bounds(data_index)) { | |
124 return NULL; | |
125 } | |
126 DataLayout* data_layout = data_layout_at(data_index); | |
127 | |
128 switch (data_layout->tag()) { | |
129 case DataLayout::no_tag: | |
130 default: | |
131 ShouldNotReachHere(); | |
132 return NULL; | |
133 case DataLayout::bit_data_tag: | |
134 return new ciBitData(data_layout); | |
135 case DataLayout::counter_data_tag: | |
136 return new ciCounterData(data_layout); | |
137 case DataLayout::jump_data_tag: | |
138 return new ciJumpData(data_layout); | |
139 case DataLayout::receiver_type_data_tag: | |
140 return new ciReceiverTypeData(data_layout); | |
141 case DataLayout::virtual_call_data_tag: | |
142 return new ciVirtualCallData(data_layout); | |
143 case DataLayout::ret_data_tag: | |
144 return new ciRetData(data_layout); | |
145 case DataLayout::branch_data_tag: | |
146 return new ciBranchData(data_layout); | |
147 case DataLayout::multi_branch_data_tag: | |
148 return new ciMultiBranchData(data_layout); | |
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149 case DataLayout::arg_info_data_tag: |
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150 return new ciArgInfoData(data_layout); |
0 | 151 }; |
152 } | |
153 | |
154 // Iteration over data. | |
155 ciProfileData* ciMethodData::next_data(ciProfileData* current) { | |
156 int current_index = dp_to_di(current->dp()); | |
157 int next_index = current_index + current->size_in_bytes(); | |
158 ciProfileData* next = data_at(next_index); | |
159 return next; | |
160 } | |
161 | |
162 // Translate a bci to its corresponding data, or NULL. | |
163 ciProfileData* ciMethodData::bci_to_data(int bci) { | |
164 ciProfileData* data = data_before(bci); | |
165 for ( ; is_valid(data); data = next_data(data)) { | |
166 if (data->bci() == bci) { | |
167 set_hint_di(dp_to_di(data->dp())); | |
168 return data; | |
169 } else if (data->bci() > bci) { | |
170 break; | |
171 } | |
172 } | |
173 // bci_to_extra_data(bci) ... | |
174 DataLayout* dp = data_layout_at(data_size()); | |
175 DataLayout* end = data_layout_at(data_size() + extra_data_size()); | |
176 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { | |
177 if (dp->tag() == DataLayout::no_tag) { | |
178 _saw_free_extra_data = true; // observed an empty slot (common case) | |
179 return NULL; | |
180 } | |
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181 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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182 break; // ArgInfoData is at the end of extra data section. |
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183 } |
0 | 184 if (dp->bci() == bci) { |
185 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
186 return new ciBitData(dp); | |
187 } | |
188 } | |
189 return NULL; | |
190 } | |
191 | |
192 // Conservatively decode the trap_state of a ciProfileData. | |
193 int ciMethodData::has_trap_at(ciProfileData* data, int reason) { | |
194 typedef Deoptimization::DeoptReason DR_t; | |
195 int per_bc_reason | |
196 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason); | |
197 if (trap_count(reason) == 0) { | |
198 // Impossible for this trap to have occurred, regardless of trap_state. | |
199 // Note: This happens if the MDO is empty. | |
200 return 0; | |
201 } else if (per_bc_reason == Deoptimization::Reason_none) { | |
202 // We cannot conclude anything; a trap happened somewhere, maybe here. | |
203 return -1; | |
204 } else if (data == NULL) { | |
205 // No profile here, not even an extra_data record allocated on the fly. | |
206 // If there are empty extra_data records, and there had been a trap, | |
207 // there would have been a non-null data pointer. If there are no | |
208 // free extra_data records, we must return a conservative -1. | |
209 if (_saw_free_extra_data) | |
210 return 0; // Q.E.D. | |
211 else | |
212 return -1; // bail with a conservative answer | |
213 } else { | |
214 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason); | |
215 } | |
216 } | |
217 | |
218 int ciMethodData::trap_recompiled_at(ciProfileData* data) { | |
219 if (data == NULL) { | |
220 return (_saw_free_extra_data? 0: -1); // (see previous method) | |
221 } else { | |
222 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0; | |
223 } | |
224 } | |
225 | |
226 void ciMethodData::clear_escape_info() { | |
227 VM_ENTRY_MARK; | |
228 methodDataOop mdo = get_methodDataOop(); | |
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229 if (mdo != NULL) { |
0 | 230 mdo->clear_escape_info(); |
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231 ArgInfoData *aid = arg_info(); |
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232 int arg_count = (aid == NULL) ? 0 : aid->number_of_args(); |
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233 for (int i = 0; i < arg_count; i++) { |
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234 set_arg_modified(i, 0); |
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235 } |
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236 } |
0 | 237 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
238 } | |
239 | |
240 // copy our escape info to the methodDataOop if it exists | |
241 void ciMethodData::update_escape_info() { | |
242 VM_ENTRY_MARK; | |
243 methodDataOop mdo = get_methodDataOop(); | |
244 if ( mdo != NULL) { | |
245 mdo->set_eflags(_eflags); | |
246 mdo->set_arg_local(_arg_local); | |
247 mdo->set_arg_stack(_arg_stack); | |
248 mdo->set_arg_returned(_arg_returned); | |
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249 int arg_count = mdo->method()->size_of_parameters(); |
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250 for (int i = 0; i < arg_count; i++) { |
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251 mdo->set_arg_modified(i, arg_modified(i)); |
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252 } |
0 | 253 } |
254 } | |
255 | |
256 bool ciMethodData::has_escape_info() { | |
257 return eflag_set(methodDataOopDesc::estimated); | |
258 } | |
259 | |
260 void ciMethodData::set_eflag(methodDataOopDesc::EscapeFlag f) { | |
261 set_bits(_eflags, f); | |
262 } | |
263 | |
264 void ciMethodData::clear_eflag(methodDataOopDesc::EscapeFlag f) { | |
265 clear_bits(_eflags, f); | |
266 } | |
267 | |
268 bool ciMethodData::eflag_set(methodDataOopDesc::EscapeFlag f) const { | |
269 return mask_bits(_eflags, f) != 0; | |
270 } | |
271 | |
272 void ciMethodData::set_arg_local(int i) { | |
273 set_nth_bit(_arg_local, i); | |
274 } | |
275 | |
276 void ciMethodData::set_arg_stack(int i) { | |
277 set_nth_bit(_arg_stack, i); | |
278 } | |
279 | |
280 void ciMethodData::set_arg_returned(int i) { | |
281 set_nth_bit(_arg_returned, i); | |
282 } | |
283 | |
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284 void ciMethodData::set_arg_modified(int arg, uint val) { |
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285 ArgInfoData *aid = arg_info(); |
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286 if (aid == NULL) |
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287 return; |
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288 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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289 aid->set_arg_modified(arg, val); |
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290 } |
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291 |
0 | 292 bool ciMethodData::is_arg_local(int i) const { |
293 return is_set_nth_bit(_arg_local, i); | |
294 } | |
295 | |
296 bool ciMethodData::is_arg_stack(int i) const { | |
297 return is_set_nth_bit(_arg_stack, i); | |
298 } | |
299 | |
300 bool ciMethodData::is_arg_returned(int i) const { | |
301 return is_set_nth_bit(_arg_returned, i); | |
302 } | |
303 | |
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304 uint ciMethodData::arg_modified(int arg) const { |
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305 ArgInfoData *aid = arg_info(); |
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306 if (aid == NULL) |
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307 return 0; |
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308 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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309 return aid->arg_modified(arg); |
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310 } |
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311 |
0 | 312 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { |
313 // Get offset within methodDataOop of the data array | |
314 ByteSize data_offset = methodDataOopDesc::data_offset(); | |
315 | |
316 // Get cell offset of the ProfileData within data array | |
317 int cell_offset = dp_to_di(data->dp()); | |
318 | |
319 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag | |
320 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data); | |
321 | |
322 return in_ByteSize(offset); | |
323 } | |
324 | |
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325 ciArgInfoData *ciMethodData::arg_info() const { |
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326 // Should be last, have to skip all traps. |
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327 DataLayout* dp = data_layout_at(data_size()); |
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328 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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329 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { |
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330 if (dp->tag() == DataLayout::arg_info_data_tag) |
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331 return new ciArgInfoData(dp); |
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332 } |
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333 return NULL; |
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334 } |
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335 |
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336 |
0 | 337 // Implementation of the print method. |
338 void ciMethodData::print_impl(outputStream* st) { | |
339 ciObject::print_impl(st); | |
340 } | |
341 | |
342 #ifndef PRODUCT | |
343 void ciMethodData::print() { | |
344 print_data_on(tty); | |
345 } | |
346 | |
347 void ciMethodData::print_data_on(outputStream* st) { | |
348 ResourceMark rm; | |
349 ciProfileData* data; | |
350 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
351 st->print("%d", dp_to_di(data->dp())); | |
352 st->fill_to(6); | |
353 data->print_data_on(st); | |
354 } | |
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355 st->print_cr("--- Extra data:"); |
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356 DataLayout* dp = data_layout_at(data_size()); |
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357 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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358 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { |
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359 if (dp->tag() == DataLayout::no_tag) continue; |
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360 if (dp->tag() == DataLayout::bit_data_tag) { |
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361 data = new BitData(dp); |
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362 } else { |
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363 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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364 data = new ciArgInfoData(dp); |
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365 dp = end; // ArgInfoData is at the end of extra data section. |
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366 } |
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367 st->print("%d", dp_to_di(data->dp())); |
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368 st->fill_to(6); |
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369 data->print_data_on(st); |
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370 } |
0 | 371 } |
372 | |
373 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
374 uint row; | |
375 int entries = 0; | |
376 for (row = 0; row < row_limit(); row++) { | |
377 if (receiver(row) != NULL) entries++; | |
378 } | |
379 st->print_cr("count(%u) entries(%u)", count(), entries); | |
380 for (row = 0; row < row_limit(); row++) { | |
381 if (receiver(row) != NULL) { | |
382 tab(st); | |
383 receiver(row)->print_name_on(st); | |
384 st->print_cr("(%u)", receiver_count(row)); | |
385 } | |
386 } | |
387 } | |
388 | |
389 void ciReceiverTypeData::print_data_on(outputStream* st) { | |
390 print_shared(st, "ciReceiverTypeData"); | |
391 print_receiver_data_on(st); | |
392 } | |
393 | |
394 void ciVirtualCallData::print_data_on(outputStream* st) { | |
395 print_shared(st, "ciVirtualCallData"); | |
396 rtd_super()->print_receiver_data_on(st); | |
397 } | |
398 #endif |