Mercurial > hg > truffle
annotate src/share/vm/ci/ciMethodData.cpp @ 6800:9191895df19d
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Reviewed-by: kvn
author | twisti |
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date | Mon, 24 Sep 2012 17:59:24 -0700 |
parents | da91efe96a93 |
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0 | 1 /* |
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2 * Copyright (c) 2001, 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" |
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26 #include "ci/ciMetadata.hpp" |
1972 | 27 #include "ci/ciMethodData.hpp" |
28 #include "ci/ciUtilities.hpp" | |
29 #include "memory/allocation.inline.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "runtime/deoptimization.hpp" | |
32 #include "utilities/copy.hpp" | |
0 | 33 |
34 // ciMethodData | |
35 | |
36 // ------------------------------------------------------------------ | |
37 // ciMethodData::ciMethodData | |
38 // | |
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39 ciMethodData::ciMethodData(MethodData* md) : ciMetadata(md) { |
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40 assert(md != NULL, "no null method data"); |
0 | 41 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); |
42 _data = NULL; | |
43 _data_size = 0; | |
44 _extra_data_size = 0; | |
45 _current_mileage = 0; | |
1783 | 46 _invocation_counter = 0; |
47 _backedge_counter = 0; | |
0 | 48 _state = empty_state; |
49 _saw_free_extra_data = false; | |
50 // Set an initial hint. Don't use set_hint_di() because | |
51 // first_di() may be out of bounds if data_size is 0. | |
52 _hint_di = first_di(); | |
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53 // Initialize the escape information (to "don't know."); |
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54 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 55 } |
56 | |
57 // ------------------------------------------------------------------ | |
58 // ciMethodData::ciMethodData | |
59 // | |
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60 // No MethodData*. |
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61 ciMethodData::ciMethodData() : ciMetadata(NULL) { |
0 | 62 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); |
63 _data = NULL; | |
64 _data_size = 0; | |
65 _extra_data_size = 0; | |
66 _current_mileage = 0; | |
1783 | 67 _invocation_counter = 0; |
68 _backedge_counter = 0; | |
0 | 69 _state = empty_state; |
70 _saw_free_extra_data = false; | |
71 // Set an initial hint. Don't use set_hint_di() because | |
72 // first_di() may be out of bounds if data_size is 0. | |
73 _hint_di = first_di(); | |
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74 // Initialize the escape information (to "don't know."); |
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75 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
0 | 76 } |
77 | |
78 void ciMethodData::load_data() { | |
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79 MethodData* mdo = get_MethodData(); |
0 | 80 if (mdo == NULL) return; |
81 | |
82 // To do: don't copy the data if it is not "ripe" -- require a minimum # | |
83 // of invocations. | |
84 | |
85 // Snapshot the data -- actually, take an approximate snapshot of | |
86 // the data. Any concurrently executing threads may be changing the | |
87 // data as we copy it. | |
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88 Copy::disjoint_words((HeapWord*) mdo, |
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89 (HeapWord*) &_orig, |
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90 sizeof(_orig) / HeapWordSize); |
0 | 91 Arena* arena = CURRENT_ENV->arena(); |
92 _data_size = mdo->data_size(); | |
93 _extra_data_size = mdo->extra_data_size(); | |
94 int total_size = _data_size + _extra_data_size; | |
95 _data = (intptr_t *) arena->Amalloc(total_size); | |
96 Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize); | |
97 | |
98 // Traverse the profile data, translating any oops into their | |
99 // ci equivalents. | |
100 ResourceMark rm; | |
101 ciProfileData* ci_data = first_data(); | |
102 ProfileData* data = mdo->first_data(); | |
103 while (is_valid(ci_data)) { | |
104 ci_data->translate_from(data); | |
105 ci_data = next_data(ci_data); | |
106 data = mdo->next_data(data); | |
107 } | |
108 // Note: Extra data are all BitData, and do not need translation. | |
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109 _current_mileage = MethodData::mileage_of(mdo->method()); |
1783 | 110 _invocation_counter = mdo->invocation_count(); |
111 _backedge_counter = mdo->backedge_count(); | |
0 | 112 _state = mdo->is_mature()? mature_state: immature_state; |
113 | |
114 _eflags = mdo->eflags(); | |
115 _arg_local = mdo->arg_local(); | |
116 _arg_stack = mdo->arg_stack(); | |
117 _arg_returned = mdo->arg_returned(); | |
118 } | |
119 | |
120 void ciReceiverTypeData::translate_receiver_data_from(ProfileData* data) { | |
121 for (uint row = 0; row < row_limit(); row++) { | |
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122 Klass* k = data->as_ReceiverTypeData()->receiver(row); |
0 | 123 if (k != NULL) { |
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124 ciKlass* klass = CURRENT_ENV->get_klass(k); |
0 | 125 set_receiver(row, klass); |
126 } | |
127 } | |
128 } | |
129 | |
130 | |
131 // Get the data at an arbitrary (sort of) data index. | |
132 ciProfileData* ciMethodData::data_at(int data_index) { | |
133 if (out_of_bounds(data_index)) { | |
134 return NULL; | |
135 } | |
136 DataLayout* data_layout = data_layout_at(data_index); | |
137 | |
138 switch (data_layout->tag()) { | |
139 case DataLayout::no_tag: | |
140 default: | |
141 ShouldNotReachHere(); | |
142 return NULL; | |
143 case DataLayout::bit_data_tag: | |
144 return new ciBitData(data_layout); | |
145 case DataLayout::counter_data_tag: | |
146 return new ciCounterData(data_layout); | |
147 case DataLayout::jump_data_tag: | |
148 return new ciJumpData(data_layout); | |
149 case DataLayout::receiver_type_data_tag: | |
150 return new ciReceiverTypeData(data_layout); | |
151 case DataLayout::virtual_call_data_tag: | |
152 return new ciVirtualCallData(data_layout); | |
153 case DataLayout::ret_data_tag: | |
154 return new ciRetData(data_layout); | |
155 case DataLayout::branch_data_tag: | |
156 return new ciBranchData(data_layout); | |
157 case DataLayout::multi_branch_data_tag: | |
158 return new ciMultiBranchData(data_layout); | |
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159 case DataLayout::arg_info_data_tag: |
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160 return new ciArgInfoData(data_layout); |
0 | 161 }; |
162 } | |
163 | |
164 // Iteration over data. | |
165 ciProfileData* ciMethodData::next_data(ciProfileData* current) { | |
166 int current_index = dp_to_di(current->dp()); | |
167 int next_index = current_index + current->size_in_bytes(); | |
168 ciProfileData* next = data_at(next_index); | |
169 return next; | |
170 } | |
171 | |
172 // Translate a bci to its corresponding data, or NULL. | |
173 ciProfileData* ciMethodData::bci_to_data(int bci) { | |
174 ciProfileData* data = data_before(bci); | |
175 for ( ; is_valid(data); data = next_data(data)) { | |
176 if (data->bci() == bci) { | |
177 set_hint_di(dp_to_di(data->dp())); | |
178 return data; | |
179 } else if (data->bci() > bci) { | |
180 break; | |
181 } | |
182 } | |
183 // bci_to_extra_data(bci) ... | |
184 DataLayout* dp = data_layout_at(data_size()); | |
185 DataLayout* end = data_layout_at(data_size() + extra_data_size()); | |
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186 for (; dp < end; dp = MethodData::next_extra(dp)) { |
0 | 187 if (dp->tag() == DataLayout::no_tag) { |
188 _saw_free_extra_data = true; // observed an empty slot (common case) | |
189 return NULL; | |
190 } | |
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191 if (dp->tag() == DataLayout::arg_info_data_tag) { |
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192 break; // ArgInfoData is at the end of extra data section. |
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193 } |
0 | 194 if (dp->bci() == bci) { |
195 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
196 return new ciBitData(dp); | |
197 } | |
198 } | |
199 return NULL; | |
200 } | |
201 | |
202 // Conservatively decode the trap_state of a ciProfileData. | |
203 int ciMethodData::has_trap_at(ciProfileData* data, int reason) { | |
204 typedef Deoptimization::DeoptReason DR_t; | |
205 int per_bc_reason | |
206 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason); | |
207 if (trap_count(reason) == 0) { | |
208 // Impossible for this trap to have occurred, regardless of trap_state. | |
209 // Note: This happens if the MDO is empty. | |
210 return 0; | |
211 } else if (per_bc_reason == Deoptimization::Reason_none) { | |
212 // We cannot conclude anything; a trap happened somewhere, maybe here. | |
213 return -1; | |
214 } else if (data == NULL) { | |
215 // No profile here, not even an extra_data record allocated on the fly. | |
216 // If there are empty extra_data records, and there had been a trap, | |
217 // there would have been a non-null data pointer. If there are no | |
218 // free extra_data records, we must return a conservative -1. | |
219 if (_saw_free_extra_data) | |
220 return 0; // Q.E.D. | |
221 else | |
222 return -1; // bail with a conservative answer | |
223 } else { | |
224 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason); | |
225 } | |
226 } | |
227 | |
228 int ciMethodData::trap_recompiled_at(ciProfileData* data) { | |
229 if (data == NULL) { | |
230 return (_saw_free_extra_data? 0: -1); // (see previous method) | |
231 } else { | |
232 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0; | |
233 } | |
234 } | |
235 | |
236 void ciMethodData::clear_escape_info() { | |
237 VM_ENTRY_MARK; | |
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238 MethodData* mdo = get_MethodData(); |
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239 if (mdo != NULL) { |
0 | 240 mdo->clear_escape_info(); |
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241 ArgInfoData *aid = arg_info(); |
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242 int arg_count = (aid == NULL) ? 0 : aid->number_of_args(); |
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243 for (int i = 0; i < arg_count; i++) { |
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244 set_arg_modified(i, 0); |
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245 } |
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246 } |
0 | 247 _eflags = _arg_local = _arg_stack = _arg_returned = 0; |
248 } | |
249 | |
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250 // copy our escape info to the MethodData* if it exists |
0 | 251 void ciMethodData::update_escape_info() { |
252 VM_ENTRY_MARK; | |
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253 MethodData* mdo = get_MethodData(); |
0 | 254 if ( mdo != NULL) { |
255 mdo->set_eflags(_eflags); | |
256 mdo->set_arg_local(_arg_local); | |
257 mdo->set_arg_stack(_arg_stack); | |
258 mdo->set_arg_returned(_arg_returned); | |
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259 int arg_count = mdo->method()->size_of_parameters(); |
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260 for (int i = 0; i < arg_count; i++) { |
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261 mdo->set_arg_modified(i, arg_modified(i)); |
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262 } |
0 | 263 } |
264 } | |
265 | |
1783 | 266 void ciMethodData::set_compilation_stats(short loops, short blocks) { |
267 VM_ENTRY_MARK; | |
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268 MethodData* mdo = get_MethodData(); |
1783 | 269 if (mdo != NULL) { |
270 mdo->set_num_loops(loops); | |
271 mdo->set_num_blocks(blocks); | |
272 } | |
273 } | |
274 | |
275 void ciMethodData::set_would_profile(bool p) { | |
276 VM_ENTRY_MARK; | |
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277 MethodData* mdo = get_MethodData(); |
1783 | 278 if (mdo != NULL) { |
279 mdo->set_would_profile(p); | |
280 } | |
281 } | |
282 | |
0 | 283 bool ciMethodData::has_escape_info() { |
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284 return eflag_set(MethodData::estimated); |
0 | 285 } |
286 | |
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287 void ciMethodData::set_eflag(MethodData::EscapeFlag f) { |
0 | 288 set_bits(_eflags, f); |
289 } | |
290 | |
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291 void ciMethodData::clear_eflag(MethodData::EscapeFlag f) { |
0 | 292 clear_bits(_eflags, f); |
293 } | |
294 | |
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295 bool ciMethodData::eflag_set(MethodData::EscapeFlag f) const { |
0 | 296 return mask_bits(_eflags, f) != 0; |
297 } | |
298 | |
299 void ciMethodData::set_arg_local(int i) { | |
300 set_nth_bit(_arg_local, i); | |
301 } | |
302 | |
303 void ciMethodData::set_arg_stack(int i) { | |
304 set_nth_bit(_arg_stack, i); | |
305 } | |
306 | |
307 void ciMethodData::set_arg_returned(int i) { | |
308 set_nth_bit(_arg_returned, i); | |
309 } | |
310 | |
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311 void ciMethodData::set_arg_modified(int arg, uint val) { |
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312 ArgInfoData *aid = arg_info(); |
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313 if (aid == NULL) |
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314 return; |
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315 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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316 aid->set_arg_modified(arg, val); |
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317 } |
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318 |
0 | 319 bool ciMethodData::is_arg_local(int i) const { |
320 return is_set_nth_bit(_arg_local, i); | |
321 } | |
322 | |
323 bool ciMethodData::is_arg_stack(int i) const { | |
324 return is_set_nth_bit(_arg_stack, i); | |
325 } | |
326 | |
327 bool ciMethodData::is_arg_returned(int i) const { | |
328 return is_set_nth_bit(_arg_returned, i); | |
329 } | |
330 | |
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331 uint ciMethodData::arg_modified(int arg) const { |
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332 ArgInfoData *aid = arg_info(); |
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333 if (aid == NULL) |
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334 return 0; |
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335 assert(arg >= 0 && arg < aid->number_of_args(), "valid argument number"); |
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336 return aid->arg_modified(arg); |
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337 } |
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338 |
0 | 339 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { |
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340 // Get offset within MethodData* of the data array |
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341 ByteSize data_offset = MethodData::data_offset(); |
0 | 342 |
343 // Get cell offset of the ProfileData within data array | |
344 int cell_offset = dp_to_di(data->dp()); | |
345 | |
346 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag | |
347 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data); | |
348 | |
349 return in_ByteSize(offset); | |
350 } | |
351 | |
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352 ciArgInfoData *ciMethodData::arg_info() const { |
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353 // Should be last, have to skip all traps. |
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354 DataLayout* dp = data_layout_at(data_size()); |
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355 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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356 for (; dp < end; dp = MethodData::next_extra(dp)) { |
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357 if (dp->tag() == DataLayout::arg_info_data_tag) |
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358 return new ciArgInfoData(dp); |
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359 } |
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360 return NULL; |
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361 } |
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362 |
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363 |
0 | 364 // Implementation of the print method. |
365 void ciMethodData::print_impl(outputStream* st) { | |
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366 ciMetadata::print_impl(st); |
0 | 367 } |
368 | |
369 #ifndef PRODUCT | |
370 void ciMethodData::print() { | |
371 print_data_on(tty); | |
372 } | |
373 | |
374 void ciMethodData::print_data_on(outputStream* st) { | |
375 ResourceMark rm; | |
376 ciProfileData* data; | |
377 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
378 st->print("%d", dp_to_di(data->dp())); | |
379 st->fill_to(6); | |
380 data->print_data_on(st); | |
381 } | |
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382 st->print_cr("--- Extra data:"); |
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383 DataLayout* dp = data_layout_at(data_size()); |
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384 DataLayout* end = data_layout_at(data_size() + extra_data_size()); |
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385 for (; dp < end; dp = MethodData::next_extra(dp)) { |
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386 if (dp->tag() == DataLayout::no_tag) continue; |
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387 if (dp->tag() == DataLayout::bit_data_tag) { |
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388 data = new BitData(dp); |
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389 } else { |
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390 assert(dp->tag() == DataLayout::arg_info_data_tag, "must be BitData or ArgInfo"); |
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391 data = new ciArgInfoData(dp); |
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392 dp = end; // ArgInfoData is at the end of extra data section. |
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393 } |
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394 st->print("%d", dp_to_di(data->dp())); |
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395 st->fill_to(6); |
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396 data->print_data_on(st); |
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397 } |
0 | 398 } |
399 | |
400 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
401 uint row; | |
402 int entries = 0; | |
403 for (row = 0; row < row_limit(); row++) { | |
404 if (receiver(row) != NULL) entries++; | |
405 } | |
406 st->print_cr("count(%u) entries(%u)", count(), entries); | |
407 for (row = 0; row < row_limit(); row++) { | |
408 if (receiver(row) != NULL) { | |
409 tab(st); | |
410 receiver(row)->print_name_on(st); | |
411 st->print_cr("(%u)", receiver_count(row)); | |
412 } | |
413 } | |
414 } | |
415 | |
416 void ciReceiverTypeData::print_data_on(outputStream* st) { | |
417 print_shared(st, "ciReceiverTypeData"); | |
418 print_receiver_data_on(st); | |
419 } | |
420 | |
421 void ciVirtualCallData::print_data_on(outputStream* st) { | |
422 print_shared(st, "ciVirtualCallData"); | |
423 rtd_super()->print_receiver_data_on(st); | |
424 } | |
425 #endif |