Mercurial > hg > truffle
comparison src/share/vm/ci/ciMethodData.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 48a3fa21394b |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a61af66fc99e |
---|---|
1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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(); | |
45 } | |
46 | |
47 // ------------------------------------------------------------------ | |
48 // ciMethodData::ciMethodData | |
49 // | |
50 // No methodDataOop. | |
51 ciMethodData::ciMethodData() : ciObject() { | |
52 Copy::zero_to_words((HeapWord*) &_orig, sizeof(_orig) / sizeof(HeapWord)); | |
53 _data = NULL; | |
54 _data_size = 0; | |
55 _extra_data_size = 0; | |
56 _current_mileage = 0; | |
57 _state = empty_state; | |
58 _saw_free_extra_data = false; | |
59 // Set an initial hint. Don't use set_hint_di() because | |
60 // first_di() may be out of bounds if data_size is 0. | |
61 _hint_di = first_di(); | |
62 } | |
63 | |
64 void ciMethodData::load_data() { | |
65 methodDataOop mdo = get_methodDataOop(); | |
66 if (mdo == NULL) return; | |
67 | |
68 // To do: don't copy the data if it is not "ripe" -- require a minimum # | |
69 // of invocations. | |
70 | |
71 // Snapshot the data -- actually, take an approximate snapshot of | |
72 // the data. Any concurrently executing threads may be changing the | |
73 // data as we copy it. | |
74 int skip_header = oopDesc::header_size(); | |
75 Copy::disjoint_words((HeapWord*) mdo + skip_header, | |
76 (HeapWord*) &_orig + skip_header, | |
77 sizeof(_orig) / HeapWordSize - skip_header); | |
78 DEBUG_ONLY(*_orig.adr_method() = NULL); // no dangling oops, please | |
79 Arena* arena = CURRENT_ENV->arena(); | |
80 _data_size = mdo->data_size(); | |
81 _extra_data_size = mdo->extra_data_size(); | |
82 int total_size = _data_size + _extra_data_size; | |
83 _data = (intptr_t *) arena->Amalloc(total_size); | |
84 Copy::disjoint_words((HeapWord*) mdo->data_base(), (HeapWord*) _data, total_size / HeapWordSize); | |
85 | |
86 // Traverse the profile data, translating any oops into their | |
87 // ci equivalents. | |
88 ResourceMark rm; | |
89 ciProfileData* ci_data = first_data(); | |
90 ProfileData* data = mdo->first_data(); | |
91 while (is_valid(ci_data)) { | |
92 ci_data->translate_from(data); | |
93 ci_data = next_data(ci_data); | |
94 data = mdo->next_data(data); | |
95 } | |
96 // Note: Extra data are all BitData, and do not need translation. | |
97 _current_mileage = methodDataOopDesc::mileage_of(mdo->method()); | |
98 _state = mdo->is_mature()? mature_state: immature_state; | |
99 | |
100 _eflags = mdo->eflags(); | |
101 _arg_local = mdo->arg_local(); | |
102 _arg_stack = mdo->arg_stack(); | |
103 _arg_returned = mdo->arg_returned(); | |
104 } | |
105 | |
106 void ciReceiverTypeData::translate_receiver_data_from(ProfileData* data) { | |
107 for (uint row = 0; row < row_limit(); row++) { | |
108 klassOop k = data->as_ReceiverTypeData()->receiver(row); | |
109 if (k != NULL) { | |
110 ciKlass* klass = CURRENT_ENV->get_object(k)->as_klass(); | |
111 set_receiver(row, klass); | |
112 } | |
113 } | |
114 } | |
115 | |
116 | |
117 // Get the data at an arbitrary (sort of) data index. | |
118 ciProfileData* ciMethodData::data_at(int data_index) { | |
119 if (out_of_bounds(data_index)) { | |
120 return NULL; | |
121 } | |
122 DataLayout* data_layout = data_layout_at(data_index); | |
123 | |
124 switch (data_layout->tag()) { | |
125 case DataLayout::no_tag: | |
126 default: | |
127 ShouldNotReachHere(); | |
128 return NULL; | |
129 case DataLayout::bit_data_tag: | |
130 return new ciBitData(data_layout); | |
131 case DataLayout::counter_data_tag: | |
132 return new ciCounterData(data_layout); | |
133 case DataLayout::jump_data_tag: | |
134 return new ciJumpData(data_layout); | |
135 case DataLayout::receiver_type_data_tag: | |
136 return new ciReceiverTypeData(data_layout); | |
137 case DataLayout::virtual_call_data_tag: | |
138 return new ciVirtualCallData(data_layout); | |
139 case DataLayout::ret_data_tag: | |
140 return new ciRetData(data_layout); | |
141 case DataLayout::branch_data_tag: | |
142 return new ciBranchData(data_layout); | |
143 case DataLayout::multi_branch_data_tag: | |
144 return new ciMultiBranchData(data_layout); | |
145 }; | |
146 } | |
147 | |
148 // Iteration over data. | |
149 ciProfileData* ciMethodData::next_data(ciProfileData* current) { | |
150 int current_index = dp_to_di(current->dp()); | |
151 int next_index = current_index + current->size_in_bytes(); | |
152 ciProfileData* next = data_at(next_index); | |
153 return next; | |
154 } | |
155 | |
156 // Translate a bci to its corresponding data, or NULL. | |
157 ciProfileData* ciMethodData::bci_to_data(int bci) { | |
158 ciProfileData* data = data_before(bci); | |
159 for ( ; is_valid(data); data = next_data(data)) { | |
160 if (data->bci() == bci) { | |
161 set_hint_di(dp_to_di(data->dp())); | |
162 return data; | |
163 } else if (data->bci() > bci) { | |
164 break; | |
165 } | |
166 } | |
167 // bci_to_extra_data(bci) ... | |
168 DataLayout* dp = data_layout_at(data_size()); | |
169 DataLayout* end = data_layout_at(data_size() + extra_data_size()); | |
170 for (; dp < end; dp = methodDataOopDesc::next_extra(dp)) { | |
171 if (dp->tag() == DataLayout::no_tag) { | |
172 _saw_free_extra_data = true; // observed an empty slot (common case) | |
173 return NULL; | |
174 } | |
175 if (dp->bci() == bci) { | |
176 assert(dp->tag() == DataLayout::bit_data_tag, "sane"); | |
177 return new ciBitData(dp); | |
178 } | |
179 } | |
180 return NULL; | |
181 } | |
182 | |
183 // Conservatively decode the trap_state of a ciProfileData. | |
184 int ciMethodData::has_trap_at(ciProfileData* data, int reason) { | |
185 typedef Deoptimization::DeoptReason DR_t; | |
186 int per_bc_reason | |
187 = Deoptimization::reason_recorded_per_bytecode_if_any((DR_t) reason); | |
188 if (trap_count(reason) == 0) { | |
189 // Impossible for this trap to have occurred, regardless of trap_state. | |
190 // Note: This happens if the MDO is empty. | |
191 return 0; | |
192 } else if (per_bc_reason == Deoptimization::Reason_none) { | |
193 // We cannot conclude anything; a trap happened somewhere, maybe here. | |
194 return -1; | |
195 } else if (data == NULL) { | |
196 // No profile here, not even an extra_data record allocated on the fly. | |
197 // If there are empty extra_data records, and there had been a trap, | |
198 // there would have been a non-null data pointer. If there are no | |
199 // free extra_data records, we must return a conservative -1. | |
200 if (_saw_free_extra_data) | |
201 return 0; // Q.E.D. | |
202 else | |
203 return -1; // bail with a conservative answer | |
204 } else { | |
205 return Deoptimization::trap_state_has_reason(data->trap_state(), per_bc_reason); | |
206 } | |
207 } | |
208 | |
209 int ciMethodData::trap_recompiled_at(ciProfileData* data) { | |
210 if (data == NULL) { | |
211 return (_saw_free_extra_data? 0: -1); // (see previous method) | |
212 } else { | |
213 return Deoptimization::trap_state_is_recompiled(data->trap_state())? 1: 0; | |
214 } | |
215 } | |
216 | |
217 void ciMethodData::clear_escape_info() { | |
218 VM_ENTRY_MARK; | |
219 methodDataOop mdo = get_methodDataOop(); | |
220 if (mdo != NULL) | |
221 mdo->clear_escape_info(); | |
222 _eflags = _arg_local = _arg_stack = _arg_returned = 0; | |
223 } | |
224 | |
225 // copy our escape info to the methodDataOop if it exists | |
226 void ciMethodData::update_escape_info() { | |
227 VM_ENTRY_MARK; | |
228 methodDataOop mdo = get_methodDataOop(); | |
229 if ( mdo != NULL) { | |
230 mdo->set_eflags(_eflags); | |
231 mdo->set_arg_local(_arg_local); | |
232 mdo->set_arg_stack(_arg_stack); | |
233 mdo->set_arg_returned(_arg_returned); | |
234 } | |
235 } | |
236 | |
237 bool ciMethodData::has_escape_info() { | |
238 return eflag_set(methodDataOopDesc::estimated); | |
239 } | |
240 | |
241 void ciMethodData::set_eflag(methodDataOopDesc::EscapeFlag f) { | |
242 set_bits(_eflags, f); | |
243 } | |
244 | |
245 void ciMethodData::clear_eflag(methodDataOopDesc::EscapeFlag f) { | |
246 clear_bits(_eflags, f); | |
247 } | |
248 | |
249 bool ciMethodData::eflag_set(methodDataOopDesc::EscapeFlag f) const { | |
250 return mask_bits(_eflags, f) != 0; | |
251 } | |
252 | |
253 void ciMethodData::set_arg_local(int i) { | |
254 set_nth_bit(_arg_local, i); | |
255 } | |
256 | |
257 void ciMethodData::set_arg_stack(int i) { | |
258 set_nth_bit(_arg_stack, i); | |
259 } | |
260 | |
261 void ciMethodData::set_arg_returned(int i) { | |
262 set_nth_bit(_arg_returned, i); | |
263 } | |
264 | |
265 bool ciMethodData::is_arg_local(int i) const { | |
266 return is_set_nth_bit(_arg_local, i); | |
267 } | |
268 | |
269 bool ciMethodData::is_arg_stack(int i) const { | |
270 return is_set_nth_bit(_arg_stack, i); | |
271 } | |
272 | |
273 bool ciMethodData::is_arg_returned(int i) const { | |
274 return is_set_nth_bit(_arg_returned, i); | |
275 } | |
276 | |
277 ByteSize ciMethodData::offset_of_slot(ciProfileData* data, ByteSize slot_offset_in_data) { | |
278 // Get offset within methodDataOop of the data array | |
279 ByteSize data_offset = methodDataOopDesc::data_offset(); | |
280 | |
281 // Get cell offset of the ProfileData within data array | |
282 int cell_offset = dp_to_di(data->dp()); | |
283 | |
284 // Add in counter_offset, the # of bytes into the ProfileData of counter or flag | |
285 int offset = in_bytes(data_offset) + cell_offset + in_bytes(slot_offset_in_data); | |
286 | |
287 return in_ByteSize(offset); | |
288 } | |
289 | |
290 // Implementation of the print method. | |
291 void ciMethodData::print_impl(outputStream* st) { | |
292 ciObject::print_impl(st); | |
293 } | |
294 | |
295 #ifndef PRODUCT | |
296 void ciMethodData::print() { | |
297 print_data_on(tty); | |
298 } | |
299 | |
300 void ciMethodData::print_data_on(outputStream* st) { | |
301 ResourceMark rm; | |
302 ciProfileData* data; | |
303 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
304 st->print("%d", dp_to_di(data->dp())); | |
305 st->fill_to(6); | |
306 data->print_data_on(st); | |
307 } | |
308 } | |
309 | |
310 void ciReceiverTypeData::print_receiver_data_on(outputStream* st) { | |
311 uint row; | |
312 int entries = 0; | |
313 for (row = 0; row < row_limit(); row++) { | |
314 if (receiver(row) != NULL) entries++; | |
315 } | |
316 st->print_cr("count(%u) entries(%u)", count(), entries); | |
317 for (row = 0; row < row_limit(); row++) { | |
318 if (receiver(row) != NULL) { | |
319 tab(st); | |
320 receiver(row)->print_name_on(st); | |
321 st->print_cr("(%u)", receiver_count(row)); | |
322 } | |
323 } | |
324 } | |
325 | |
326 void ciReceiverTypeData::print_data_on(outputStream* st) { | |
327 print_shared(st, "ciReceiverTypeData"); | |
328 print_receiver_data_on(st); | |
329 } | |
330 | |
331 void ciVirtualCallData::print_data_on(outputStream* st) { | |
332 print_shared(st, "ciVirtualCallData"); | |
333 rtd_super()->print_receiver_data_on(st); | |
334 } | |
335 #endif |