Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethodData.cpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 48a3fa21394b |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 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 |