Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethodData.cpp @ 1905:ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
Reviewed-by: kvn, twisti
author | never |
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date | Tue, 19 Oct 2010 16:14:34 -0700 |
parents | d5d065957597 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
1783 | 2 * Copyright (c) 2001, 2010, 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 * | |
1552
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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 | |
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; | |
1783 | 40 _invocation_counter = 0; |
41 _backedge_counter = 0; | |
0 | 42 _state = empty_state; |
43 _saw_free_extra_data = false; | |
44 // Set an initial hint. Don't use set_hint_di() because | |
45 // first_di() may be out of bounds if data_size is 0. | |
46 _hint_di = first_di(); | |
45
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47 // Initialize the escape information (to "don't know."); |
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48 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 49 } |
50 | |
51 // ------------------------------------------------------------------ | |
52 // ciMethodData::ciMethodData | |
53 // | |
54 // No methodDataOop. | |
55 ciMethodData::ciMethodData() : ciObject() { | |
56 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); | |
57 _data = NULL; | |
58 _data_size = 0; | |
59 _extra_data_size = 0; | |
60 _current_mileage = 0; | |
1783 | 61 _invocation_counter = 0; |
62 _backedge_counter = 0; | |
0 | 63 _state = empty_state; |
64 _saw_free_extra_data = false; | |
65 // Set an initial hint. Don't use set_hint_di() because | |
66 // first_di() may be out of bounds if data_size is 0. | |
67 _hint_di = first_di(); | |
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68 // Initialize the escape information (to "don't know."); |
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69 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 70 } |
71 | |
72 void ciMethodData::load_data() { | |
73 methodDataOop mdo = get_methodDataOop(); | |
74 if (mdo == NULL) return; | |
75 | |
76 // To do: don't copy the data if it is not "ripe" -- require a minimum # | |
77 // of invocations. | |
78 | |
79 // Snapshot the data -- actually, take an approximate snapshot of | |
80 // the data. Any concurrently executing threads may be changing the | |
81 // data as we copy it. | |
82 int skip_header = oopDesc::header_size(); | |
83 Copy::disjoint_words((HeapWord*) mdo + skip_header, | |
84 (HeapWord*) &_orig + skip_header, | |
85 sizeof(_orig) / HeapWordSize - skip_header); | |
86 DEBUG_ONLY(*_orig.adr_method() = NULL); // no dangling oops, please | |
87 Arena* arena = CURRENT_ENV->arena(); | |
88 _data_size = mdo->data_size(); | |
89 _extra_data_size = mdo->extra_data_size(); | |
90 int total_size = _data_size + _extra_data_size; | |
91 _data = (intptr_t *) arena->Amalloc(total_size); | |
92 Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize); | |
93 | |
94 // Traverse the profile data, translating any oops into their | |
95 // ci equivalents. | |
96 ResourceMark rm; | |
97 ciProfileData* ci_data = first_data(); | |
98 ProfileData* data = mdo->first_data(); | |
99 while (is_valid(ci_data)) { | |
100 ci_data->translate_from(data); | |
101 ci_data = next_data(ci_data); | |
102 data = mdo->next_data(data); | |
103 } | |
104 // Note: Extra data are all BitData, and do not need translation. | |
105 _current_mileage = methodDataOopDesc::mileage_of(mdo->method()); | |
1783 | 106 _invocation_counter = mdo->invocation_count(); |
107 _backedge_counter = mdo->backedge_count(); | |
0 | 108 _state = mdo->is_mature()? mature_state: immature_state; |
109 | |
110 _eflags = mdo->eflags(); | |
111 _arg_local = mdo->arg_local(); | |
112 _arg_stack = mdo->arg_stack(); | |
113 _arg_returned = mdo->arg_returned(); | |
114 } | |
115 | |
116 void ciReceiverTypeData::translate_receiver_data_from(ProfileData* data) { | |
117 for (uint row = 0; row < row_limit(); row++) { | |
118 klassOop k = data->as_ReceiverTypeData()->receiver(row); | |
119 if (k != NULL) { | |
120 ciKlass* klass = CURRENT_ENV->get_object(k)->as_klass(); | |
121 set_receiver(row, klass); | |
122 } | |
123 } | |
124 } | |
125 | |
126 | |
127 // Get the data at an arbitrary (sort of) data index. | |
128 ciProfileData* ciMethodData::data_at(int data_index) { | |
129 if (out_of_bounds(data_index)) { | |
130 return NULL; | |
131 } | |
132 DataLayout* data_layout = data_layout_at(data_index); | |
133 | |
134 switch (data_layout->tag()) { | |
135 case DataLayout::no_tag: | |
136 default: | |
137 ShouldNotReachHere(); | |
138 return NULL; | |
139 case DataLayout::bit_data_tag: | |
140 return new ciBitData(data_layout); | |
141 case DataLayout::counter_data_tag: | |
142 return new ciCounterData(data_layout); | |
143 case DataLayout::jump_data_tag: | |
144 return new ciJumpData(data_layout); | |
145 case DataLayout::receiver_type_data_tag: | |
146 return new ciReceiverTypeData(data_layout); | |
147 case DataLayout::virtual_call_data_tag: | |
148 return new ciVirtualCallData(data_layout); | |
149 case DataLayout::ret_data_tag: | |
150 return new ciRetData(data_layout); | |
151 case DataLayout::branch_data_tag: | |
152 return new ciBranchData(data_layout); | |
153 case DataLayout::multi_branch_data_tag: | |
154 return new ciMultiBranchData(data_layout); | |
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155 case DataLayout::arg_info_data_tag: |
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156 return new ciArgInfoData(data_layout); |
0 | 157 }; |
158 } | |
159 | |
160 // Iteration over data. | |
161 ciProfileData* ciMethodData::next_data(ciProfileData* current) { | |
162 int current_index = dp_to_di(current->dp()); | |
163 int next_index = current_index + current->size_in_bytes(); | |
164 ciProfileData* next = data_at(next_index); | |
165 return next; | |
166 } | |
167 | |
168 // Translate a bci to its corresponding data, or NULL. | |
169 ciProfileData* ciMethodData::bci_to_data(int bci) { | |
170 ciProfileData* data = data_before(bci); | |
171 for ( ; is_valid(data); data = next_data(data)) { | |
172 if (data->bci() == bci) { | |
173 set_hint_di(dp_to_di(data->dp())); | |
174 return data; | |
175 } else if (data->bci() > bci) { | |
176 break; | |
177 } | |
178 } | |
179 // bci_to_extra_data(bci) ... | |
180 DataLayout* dp = data_layout_at(data_size()); | |
181 DataLayout* end = data_layout_at(data_size() + extra_data_size()); | |
182 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { | |
183 if (dp->tag() == DataLayout::no_tag) { | |
184 _saw_free_extra_data = true; // observed an empty slot (common case) | |
185 return NULL; | |
186 } | |
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187 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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188 break; // ArgInfoData is at the end of extra data section. |
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189 } |
0 | 190 if (dp->bci() == bci) { |
191 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
192 return new ciBitData(dp); | |
193 } | |
194 } | |
195 return NULL; | |
196 } | |
197 | |
198 // Conservatively decode the trap_state of a ciProfileData. | |
199 int ciMethodData::has_trap_at(ciProfileData* data, int reason) { | |
200 typedef Deoptimization::DeoptReason DR_t; | |
201 int per_bc_reason | |
202 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason); | |
203 if (trap_count(reason) == 0) { | |
204 // Impossible for this trap to have occurred, regardless of trap_state. | |
205 // Note: This happens if the MDO is empty. | |
206 return 0; | |
207 } else if (per_bc_reason == Deoptimization::Reason_none) { | |
208 // We cannot conclude anything; a trap happened somewhere, maybe here. | |
209 return -1; | |
210 } else if (data == NULL) { | |
211 // No profile here, not even an extra_data record allocated on the fly. | |
212 // If there are empty extra_data records, and there had been a trap, | |
213 // there would have been a non-null data pointer. If there are no | |
214 // free extra_data records, we must return a conservative -1. | |
215 if (_saw_free_extra_data) | |
216 return 0; // Q.E.D. | |
217 else | |
218 return -1; // bail with a conservative answer | |
219 } else { | |
220 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason); | |
221 } | |
222 } | |
223 | |
224 int ciMethodData::trap_recompiled_at(ciProfileData* data) { | |
225 if (data == NULL) { | |
226 return (_saw_free_extra_data? 0: -1); // (see previous method) | |
227 } else { | |
228 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0; | |
229 } | |
230 } | |
231 | |
232 void ciMethodData::clear_escape_info() { | |
233 VM_ENTRY_MARK; | |
234 methodDataOop mdo = get_methodDataOop(); | |
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235 if (mdo != NULL) { |
0 | 236 mdo->clear_escape_info(); |
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237 ArgInfoData *aid = arg_info(); |
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238 int arg_count = (aid == NULL) ? 0 : aid->number_of_args(); |
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239 for (int i = 0; i < arg_count; i++) { |
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240 set_arg_modified(i, 0); |
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241 } |
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242 } |
0 | 243 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
244 } | |
245 | |
246 // copy our escape info to the methodDataOop if it exists | |
247 void ciMethodData::update_escape_info() { | |
248 VM_ENTRY_MARK; | |
249 methodDataOop mdo = get_methodDataOop(); | |
250 if ( mdo != NULL) { | |
251 mdo->set_eflags(_eflags); | |
252 mdo->set_arg_local(_arg_local); | |
253 mdo->set_arg_stack(_arg_stack); | |
254 mdo->set_arg_returned(_arg_returned); | |
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255 int arg_count = mdo->method()->size_of_parameters(); |
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256 for (int i = 0; i < arg_count; i++) { |
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257 mdo->set_arg_modified(i, arg_modified(i)); |
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258 } |
0 | 259 } |
260 } | |
261 | |
1783 | 262 void ciMethodData::set_compilation_stats(short loops, short blocks) { |
263 VM_ENTRY_MARK; | |
264 methodDataOop mdo = get_methodDataOop(); | |
265 if (mdo != NULL) { | |
266 mdo->set_num_loops(loops); | |
267 mdo->set_num_blocks(blocks); | |
268 } | |
269 } | |
270 | |
271 void ciMethodData::set_would_profile(bool p) { | |
272 VM_ENTRY_MARK; | |
273 methodDataOop mdo = get_methodDataOop(); | |
274 if (mdo != NULL) { | |
275 mdo->set_would_profile(p); | |
276 } | |
277 } | |
278 | |
0 | 279 bool ciMethodData::has_escape_info() { |
280 return eflag_set(methodDataOopDesc::estimated); | |
281 } | |
282 | |
283 void ciMethodData::set_eflag(methodDataOopDesc::EscapeFlag f) { | |
284 set_bits(_eflags, f); | |
285 } | |
286 | |
287 void ciMethodData::clear_eflag(methodDataOopDesc::EscapeFlag f) { | |
288 clear_bits(_eflags, f); | |
289 } | |
290 | |
291 bool ciMethodData::eflag_set(methodDataOopDesc::EscapeFlag f) const { | |
292 return mask_bits(_eflags, f) != 0; | |
293 } | |
294 | |
295 void ciMethodData::set_arg_local(int i) { | |
296 set_nth_bit(_arg_local, i); | |
297 } | |
298 | |
299 void ciMethodData::set_arg_stack(int i) { | |
300 set_nth_bit(_arg_stack, i); | |
301 } | |
302 | |
303 void ciMethodData::set_arg_returned(int i) { | |
304 set_nth_bit(_arg_returned, i); | |
305 } | |
306 | |
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307 void ciMethodData::set_arg_modified(int arg, uint val) { |
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308 ArgInfoData *aid = arg_info(); |
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309 if (aid == NULL) |
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310 return; |
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311 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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312 aid->set_arg_modified(arg, val); |
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313 } |
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314 |
0 | 315 bool ciMethodData::is_arg_local(int i) const { |
316 return is_set_nth_bit(_arg_local, i); | |
317 } | |
318 | |
319 bool ciMethodData::is_arg_stack(int i) const { | |
320 return is_set_nth_bit(_arg_stack, i); | |
321 } | |
322 | |
323 bool ciMethodData::is_arg_returned(int i) const { | |
324 return is_set_nth_bit(_arg_returned, i); | |
325 } | |
326 | |
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327 uint ciMethodData::arg_modified(int arg) const { |
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328 ArgInfoData *aid = arg_info(); |
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329 if (aid == NULL) |
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330 return 0; |
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331 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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332 return aid->arg_modified(arg); |
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333 } |
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334 |
0 | 335 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { |
336 // Get offset within methodDataOop of the data array | |
337 ByteSize data_offset = methodDataOopDesc::data_offset(); | |
338 | |
339 // Get cell offset of the ProfileData within data array | |
340 int cell_offset = dp_to_di(data->dp()); | |
341 | |
342 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag | |
343 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data); | |
344 | |
345 return in_ByteSize(offset); | |
346 } | |
347 | |
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348 ciArgInfoData *ciMethodData::arg_info() const { |
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349 // Should be last, have to skip all traps. |
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350 DataLayout* dp = data_layout_at(data_size()); |
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351 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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352 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { |
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353 if (dp->tag() == DataLayout::arg_info_data_tag) |
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354 return new ciArgInfoData(dp); |
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355 } |
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356 return NULL; |
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357 } |
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358 |
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359 |
0 | 360 // Implementation of the print method. |
361 void ciMethodData::print_impl(outputStream* st) { | |
362 ciObject::print_impl(st); | |
363 } | |
364 | |
365 #ifndef PRODUCT | |
366 void ciMethodData::print() { | |
367 print_data_on(tty); | |
368 } | |
369 | |
370 void ciMethodData::print_data_on(outputStream* st) { | |
371 ResourceMark rm; | |
372 ciProfileData* data; | |
373 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
374 st->print("%d", dp_to_di(data->dp())); | |
375 st->fill_to(6); | |
376 data->print_data_on(st); | |
377 } | |
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378 st->print_cr("--- Extra data:"); |
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379 DataLayout* dp = data_layout_at(data_size()); |
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380 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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381 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { |
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382 if (dp->tag() == DataLayout::no_tag) continue; |
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383 if (dp->tag() == DataLayout::bit_data_tag) { |
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384 data = new BitData(dp); |
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385 } else { |
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386 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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387 data = new ciArgInfoData(dp); |
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388 dp = end; // ArgInfoData is at the end of extra data section. |
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389 } |
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390 st->print("%d", dp_to_di(data->dp())); |
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391 st->fill_to(6); |
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392 data->print_data_on(st); |
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393 } |
0 | 394 } |
395 | |
396 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
397 uint row; | |
398 int entries = 0; | |
399 for (row = 0; row < row_limit(); row++) { | |
400 if (receiver(row) != NULL) entries++; | |
401 } | |
402 st->print_cr("count(%u) entries(%u)", count(), entries); | |
403 for (row = 0; row < row_limit(); row++) { | |
404 if (receiver(row) != NULL) { | |
405 tab(st); | |
406 receiver(row)->print_name_on(st); | |
407 st->print_cr("(%u)", receiver_count(row)); | |
408 } | |
409 } | |
410 } | |
411 | |
412 void ciReceiverTypeData::print_data_on(outputStream* st) { | |
413 print_shared(st, "ciReceiverTypeData"); | |
414 print_receiver_data_on(st); | |
415 } | |
416 | |
417 void ciVirtualCallData::print_data_on(outputStream* st) { | |
418 print_shared(st, "ciVirtualCallData"); | |
419 rtd_super()->print_receiver_data_on(st); | |
420 } | |
421 #endif |