Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 12966:b2ee5dc63353
8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti
author | roland |
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date | Wed, 23 Oct 2013 12:40:23 +0200 |
parents | 5ccbab1c69f3 |
children | 6e1826d5c23e 2b8e28fdf503 |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 2000, 2013, 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 #ifndef SHARE_VM_OOPS_METHODDATAOOP_HPP |
26 #define SHARE_VM_OOPS_METHODDATAOOP_HPP | |
27 | |
28 #include "interpreter/bytecodes.hpp" | |
29 #include "memory/universe.hpp" | |
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30 #include "oops/method.hpp" |
1972 | 31 #include "oops/oop.hpp" |
32 #include "runtime/orderAccess.hpp" | |
33 | |
0 | 34 class BytecodeStream; |
7956 | 35 class KlassSizeStats; |
0 | 36 |
37 // The MethodData object collects counts and other profile information | |
38 // during zeroth-tier (interpretive) and first-tier execution. | |
39 // The profile is used later by compilation heuristics. Some heuristics | |
40 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
41 // optimization often has a down-side, a corner case that it handles | |
42 // poorly, but which is thought to be rare. The profile provides | |
43 // evidence of this rarity for a given method or even BCI. It allows | |
44 // the compiler to back out of the optimization at places where it | |
45 // has historically been a poor choice. Other heuristics try to use | |
46 // specific information gathered about types observed at a given site. | |
47 // | |
48 // All data in the profile is approximate. It is expected to be accurate | |
49 // on the whole, but the system expects occasional inaccuraces, due to | |
50 // counter overflow, multiprocessor races during data collection, space | |
51 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
52 // optimization quality but will not affect correctness. Also, each MDO | |
53 // is marked with its birth-date ("creation_mileage") which can be used | |
54 // to assess the quality ("maturity") of its data. | |
55 // | |
56 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
57 // state. Also, certain recorded per-BCI events are given one-bit counters | |
58 // which overflow to a saturated state which applied to all counters at | |
59 // that BCI. In other words, there is a small lattice which approximates | |
60 // the ideal of an infinite-precision counter for each event at each BCI, | |
61 // and the lattice quickly "bottoms out" in a state where all counters | |
62 // are taken to be indefinitely large. | |
63 // | |
64 // The reader will find many data races in profile gathering code, starting | |
65 // with invocation counter incrementation. None of these races harm correct | |
66 // execution of the compiled code. | |
67 | |
941 | 68 // forward decl |
69 class ProfileData; | |
70 | |
0 | 71 // DataLayout |
72 // | |
73 // Overlay for generic profiling data. | |
74 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
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75 friend class VMStructs; |
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76 |
0 | 77 private: |
78 // Every data layout begins with a header. This header | |
79 // contains a tag, which is used to indicate the size/layout | |
80 // of the data, 4 bits of flags, which can be used in any way, | |
81 // 4 bits of trap history (none/one reason/many reasons), | |
82 // and a bci, which is used to tie this piece of data to a | |
83 // specific bci in the bytecodes. | |
84 union { | |
85 intptr_t _bits; | |
86 struct { | |
87 u1 _tag; | |
88 u1 _flags; | |
89 u2 _bci; | |
90 } _struct; | |
91 } _header; | |
92 | |
93 // The data layout has an arbitrary number of cells, each sized | |
94 // to accomodate a pointer or an integer. | |
95 intptr_t _cells[1]; | |
96 | |
97 // Some types of data layouts need a length field. | |
98 static bool needs_array_len(u1 tag); | |
99 | |
100 public: | |
101 enum { | |
102 counter_increment = 1 | |
103 }; | |
104 | |
105 enum { | |
106 cell_size = sizeof(intptr_t) | |
107 }; | |
108 | |
109 // Tag values | |
110 enum { | |
111 no_tag, | |
112 bit_data_tag, | |
113 counter_data_tag, | |
114 jump_data_tag, | |
115 receiver_type_data_tag, | |
116 virtual_call_data_tag, | |
117 ret_data_tag, | |
118 branch_data_tag, | |
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119 multi_branch_data_tag, |
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120 arg_info_data_tag, |
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121 call_type_data_tag, |
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122 virtual_call_type_data_tag, |
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123 parameters_type_data_tag |
0 | 124 }; |
125 | |
126 enum { | |
127 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
128 // The trap state breaks down further as [recompile:1 | reason:3]. | |
129 // This further breakdown is defined in deoptimization.cpp. | |
130 // See Deoptimization::trap_state_reason for an assert that | |
131 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
132 // | |
133 // The trap_state is collected only if ProfileTraps is true. | |
134 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
135 trap_shift = BitsPerByte - trap_bits, | |
136 trap_mask = right_n_bits(trap_bits), | |
137 trap_mask_in_place = (trap_mask << trap_shift), | |
138 flag_limit = trap_shift, | |
139 flag_mask = right_n_bits(flag_limit), | |
140 first_flag = 0 | |
141 }; | |
142 | |
143 // Size computation | |
144 static int header_size_in_bytes() { | |
145 return cell_size; | |
146 } | |
147 static int header_size_in_cells() { | |
148 return 1; | |
149 } | |
150 | |
151 static int compute_size_in_bytes(int cell_count) { | |
152 return header_size_in_bytes() + cell_count * cell_size; | |
153 } | |
154 | |
155 // Initialization | |
156 void initialize(u1 tag, u2 bci, int cell_count); | |
157 | |
158 // Accessors | |
159 u1 tag() { | |
160 return _header._struct._tag; | |
161 } | |
162 | |
163 // Return a few bits of trap state. Range is [0..trap_mask]. | |
164 // The state tells if traps with zero, one, or many reasons have occurred. | |
165 // It also tells whether zero or many recompilations have occurred. | |
166 // The associated trap histogram in the MDO itself tells whether | |
167 // traps are common or not. If a BCI shows that a trap X has | |
168 // occurred, and the MDO shows N occurrences of X, we make the | |
169 // simplifying assumption that all N occurrences can be blamed | |
170 // on that BCI. | |
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171 int trap_state() const { |
0 | 172 return ((_header._struct._flags >> trap_shift) & trap_mask); |
173 } | |
174 | |
175 void set_trap_state(int new_state) { | |
176 assert(ProfileTraps, "used only under +ProfileTraps"); | |
177 uint old_flags = (_header._struct._flags & flag_mask); | |
178 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
179 } | |
180 | |
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181 u1 flags() const { |
0 | 182 return _header._struct._flags; |
183 } | |
184 | |
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185 u2 bci() const { |
0 | 186 return _header._struct._bci; |
187 } | |
188 | |
189 void set_header(intptr_t value) { | |
190 _header._bits = value; | |
191 } | |
192 void release_set_header(intptr_t value) { | |
193 OrderAccess::release_store_ptr(&_header._bits, value); | |
194 } | |
195 intptr_t header() { | |
196 return _header._bits; | |
197 } | |
198 void set_cell_at(int index, intptr_t value) { | |
199 _cells[index] = value; | |
200 } | |
201 void release_set_cell_at(int index, intptr_t value) { | |
202 OrderAccess::release_store_ptr(&_cells[index], value); | |
203 } | |
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204 intptr_t cell_at(int index) const { |
0 | 205 return _cells[index]; |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
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212 bool flag_at(int flag_number) const { |
0 | 213 assert(flag_number < flag_limit, "oob"); |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
233 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
234 static int flag_number_to_byte_constant(int flag_number) { | |
235 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
236 DataLayout temp; temp.set_header(0); | |
237 temp.set_flag_at(flag_number); | |
238 return temp._header._struct._flags; | |
239 } | |
240 // Return a value which, when or-ed as a word into _header, sets the flag. | |
241 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
242 DataLayout temp; temp.set_header(0); | |
243 temp._header._struct._flags = byte_constant; | |
244 return temp._header._bits; | |
245 } | |
941 | 246 |
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247 ProfileData* data_in(); |
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248 |
941 | 249 // GC support |
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250 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 251 }; |
252 | |
253 | |
254 // ProfileData class hierarchy | |
255 class ProfileData; | |
256 class BitData; | |
257 class CounterData; | |
258 class ReceiverTypeData; | |
259 class VirtualCallData; | |
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260 class VirtualCallTypeData; |
0 | 261 class RetData; |
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262 class CallTypeData; |
0 | 263 class JumpData; |
264 class BranchData; | |
265 class ArrayData; | |
266 class MultiBranchData; | |
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267 class ArgInfoData; |
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268 class ParametersTypeData; |
0 | 269 |
270 // ProfileData | |
271 // | |
272 // A ProfileData object is created to refer to a section of profiling | |
273 // data in a structured way. | |
274 class ProfileData : public ResourceObj { | |
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275 friend class TypeEntries; |
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276 friend class ReturnTypeEntry; |
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277 friend class TypeStackSlotEntries; |
0 | 278 private: |
279 #ifndef PRODUCT | |
280 enum { | |
281 tab_width_one = 16, | |
282 tab_width_two = 36 | |
283 }; | |
284 #endif // !PRODUCT | |
285 | |
286 // This is a pointer to a section of profiling data. | |
287 DataLayout* _data; | |
288 | |
289 protected: | |
290 DataLayout* data() { return _data; } | |
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291 const DataLayout* data() const { return _data; } |
0 | 292 |
293 enum { | |
294 cell_size = DataLayout::cell_size | |
295 }; | |
296 | |
297 public: | |
298 // How many cells are in this? | |
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299 virtual int cell_count() const { |
0 | 300 ShouldNotReachHere(); |
301 return -1; | |
302 } | |
303 | |
304 // Return the size of this data. | |
305 int size_in_bytes() { | |
306 return DataLayout::compute_size_in_bytes(cell_count()); | |
307 } | |
308 | |
309 protected: | |
310 // Low-level accessors for underlying data | |
311 void set_intptr_at(int index, intptr_t value) { | |
312 assert(0 <= index && index < cell_count(), "oob"); | |
313 data()->set_cell_at(index, value); | |
314 } | |
315 void release_set_intptr_at(int index, intptr_t value) { | |
316 assert(0 <= index && index < cell_count(), "oob"); | |
317 data()->release_set_cell_at(index, value); | |
318 } | |
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319 intptr_t intptr_at(int index) const { |
0 | 320 assert(0 <= index && index < cell_count(), "oob"); |
321 return data()->cell_at(index); | |
322 } | |
323 void set_uint_at(int index, uint value) { | |
324 set_intptr_at(index, (intptr_t) value); | |
325 } | |
326 void release_set_uint_at(int index, uint value) { | |
327 release_set_intptr_at(index, (intptr_t) value); | |
328 } | |
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329 uint uint_at(int index) const { |
0 | 330 return (uint)intptr_at(index); |
331 } | |
332 void set_int_at(int index, int value) { | |
333 set_intptr_at(index, (intptr_t) value); | |
334 } | |
335 void release_set_int_at(int index, int value) { | |
336 release_set_intptr_at(index, (intptr_t) value); | |
337 } | |
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338 int int_at(int index) const { |
0 | 339 return (int)intptr_at(index); |
340 } | |
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341 int int_at_unchecked(int index) const { |
0 | 342 return (int)data()->cell_at(index); |
343 } | |
344 void set_oop_at(int index, oop value) { | |
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345 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 346 } |
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347 oop oop_at(int index) const { |
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348 return cast_to_oop(intptr_at(index)); |
0 | 349 } |
350 | |
351 void set_flag_at(int flag_number) { | |
352 data()->set_flag_at(flag_number); | |
353 } | |
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354 bool flag_at(int flag_number) const { |
0 | 355 return data()->flag_at(flag_number); |
356 } | |
357 | |
358 // two convenient imports for use by subclasses: | |
359 static ByteSize cell_offset(int index) { | |
360 return DataLayout::cell_offset(index); | |
361 } | |
362 static int flag_number_to_byte_constant(int flag_number) { | |
363 return DataLayout::flag_number_to_byte_constant(flag_number); | |
364 } | |
365 | |
366 ProfileData(DataLayout* data) { | |
367 _data = data; | |
368 } | |
369 | |
370 public: | |
371 // Constructor for invalid ProfileData. | |
372 ProfileData(); | |
373 | |
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374 u2 bci() const { |
0 | 375 return data()->bci(); |
376 } | |
377 | |
378 address dp() { | |
379 return (address)_data; | |
380 } | |
381 | |
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382 int trap_state() const { |
0 | 383 return data()->trap_state(); |
384 } | |
385 void set_trap_state(int new_state) { | |
386 data()->set_trap_state(new_state); | |
387 } | |
388 | |
389 // Type checking | |
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390 virtual bool is_BitData() const { return false; } |
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391 virtual bool is_CounterData() const { return false; } |
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392 virtual bool is_JumpData() const { return false; } |
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393 virtual bool is_ReceiverTypeData()const { return false; } |
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394 virtual bool is_VirtualCallData() const { return false; } |
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395 virtual bool is_RetData() const { return false; } |
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396 virtual bool is_BranchData() const { return false; } |
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397 virtual bool is_ArrayData() const { return false; } |
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398 virtual bool is_MultiBranchData() const { return false; } |
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399 virtual bool is_ArgInfoData() const { return false; } |
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400 virtual bool is_CallTypeData() const { return false; } |
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401 virtual bool is_VirtualCallTypeData()const { return false; } |
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402 virtual bool is_ParametersTypeData() const { return false; } |
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403 |
0 | 404 |
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405 BitData* as_BitData() const { |
0 | 406 assert(is_BitData(), "wrong type"); |
407 return is_BitData() ? (BitData*) this : NULL; | |
408 } | |
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409 CounterData* as_CounterData() const { |
0 | 410 assert(is_CounterData(), "wrong type"); |
411 return is_CounterData() ? (CounterData*) this : NULL; | |
412 } | |
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413 JumpData* as_JumpData() const { |
0 | 414 assert(is_JumpData(), "wrong type"); |
415 return is_JumpData() ? (JumpData*) this : NULL; | |
416 } | |
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417 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 418 assert(is_ReceiverTypeData(), "wrong type"); |
419 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
420 } | |
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421 VirtualCallData* as_VirtualCallData() const { |
0 | 422 assert(is_VirtualCallData(), "wrong type"); |
423 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
424 } | |
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425 RetData* as_RetData() const { |
0 | 426 assert(is_RetData(), "wrong type"); |
427 return is_RetData() ? (RetData*) this : NULL; | |
428 } | |
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429 BranchData* as_BranchData() const { |
0 | 430 assert(is_BranchData(), "wrong type"); |
431 return is_BranchData() ? (BranchData*) this : NULL; | |
432 } | |
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433 ArrayData* as_ArrayData() const { |
0 | 434 assert(is_ArrayData(), "wrong type"); |
435 return is_ArrayData() ? (ArrayData*) this : NULL; | |
436 } | |
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437 MultiBranchData* as_MultiBranchData() const { |
0 | 438 assert(is_MultiBranchData(), "wrong type"); |
439 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
440 } | |
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441 ArgInfoData* as_ArgInfoData() const { |
45
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442 assert(is_ArgInfoData(), "wrong type"); |
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443 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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444 } |
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445 CallTypeData* as_CallTypeData() const { |
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446 assert(is_CallTypeData(), "wrong type"); |
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447 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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448 } |
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449 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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450 assert(is_VirtualCallTypeData(), "wrong type"); |
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451 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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452 } |
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453 ParametersTypeData* as_ParametersTypeData() const { |
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454 assert(is_ParametersTypeData(), "wrong type"); |
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455 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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456 } |
0 | 457 |
458 | |
459 // Subclass specific initialization | |
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460 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 461 |
462 // GC support | |
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463 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 464 |
465 // CI translation: ProfileData can represent both MethodDataOop data | |
466 // as well as CIMethodData data. This function is provided for translating | |
467 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
468 // most ProfileData don't require any translation, so we provide the null | |
469 // translation here, and the required translators are in the ci subclasses. | |
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470 virtual void translate_from(const ProfileData* data) {} |
0 | 471 |
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472 virtual void print_data_on(outputStream* st) const { |
0 | 473 ShouldNotReachHere(); |
474 } | |
475 | |
476 #ifndef PRODUCT | |
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477 void print_shared(outputStream* st, const char* name) const; |
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478 void tab(outputStream* st, bool first = false) const; |
0 | 479 #endif |
480 }; | |
481 | |
482 // BitData | |
483 // | |
484 // A BitData holds a flag or two in its header. | |
485 class BitData : public ProfileData { | |
486 protected: | |
487 enum { | |
488 // null_seen: | |
489 // saw a null operand (cast/aastore/instanceof) | |
490 null_seen_flag = DataLayout::first_flag + 0 | |
491 }; | |
492 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
493 public: | |
494 BitData(DataLayout* layout) : ProfileData(layout) { | |
495 } | |
496 | |
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497 virtual bool is_BitData() const { return true; } |
0 | 498 |
499 static int static_cell_count() { | |
500 return bit_cell_count; | |
501 } | |
502 | |
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503 virtual int cell_count() const { |
0 | 504 return static_cell_count(); |
505 } | |
506 | |
507 // Accessor | |
508 | |
509 // The null_seen flag bit is specially known to the interpreter. | |
510 // Consulting it allows the compiler to avoid setting up null_check traps. | |
511 bool null_seen() { return flag_at(null_seen_flag); } | |
512 void set_null_seen() { set_flag_at(null_seen_flag); } | |
513 | |
514 | |
515 // Code generation support | |
516 static int null_seen_byte_constant() { | |
517 return flag_number_to_byte_constant(null_seen_flag); | |
518 } | |
519 | |
520 static ByteSize bit_data_size() { | |
521 return cell_offset(bit_cell_count); | |
522 } | |
523 | |
524 #ifndef PRODUCT | |
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525 void print_data_on(outputStream* st) const; |
0 | 526 #endif |
527 }; | |
528 | |
529 // CounterData | |
530 // | |
531 // A CounterData corresponds to a simple counter. | |
532 class CounterData : public BitData { | |
533 protected: | |
534 enum { | |
535 count_off, | |
536 counter_cell_count | |
537 }; | |
538 public: | |
539 CounterData(DataLayout* layout) : BitData(layout) {} | |
540 | |
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541 virtual bool is_CounterData() const { return true; } |
0 | 542 |
543 static int static_cell_count() { | |
544 return counter_cell_count; | |
545 } | |
546 | |
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547 virtual int cell_count() const { |
0 | 548 return static_cell_count(); |
549 } | |
550 | |
551 // Direct accessor | |
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552 uint count() const { |
0 | 553 return uint_at(count_off); |
554 } | |
555 | |
556 // Code generation support | |
557 static ByteSize count_offset() { | |
558 return cell_offset(count_off); | |
559 } | |
560 static ByteSize counter_data_size() { | |
561 return cell_offset(counter_cell_count); | |
562 } | |
563 | |
1251
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564 void set_count(uint count) { |
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565 set_uint_at(count_off, count); |
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566 } |
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567 |
0 | 568 #ifndef PRODUCT |
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569 void print_data_on(outputStream* st) const; |
0 | 570 #endif |
571 }; | |
572 | |
573 // JumpData | |
574 // | |
575 // A JumpData is used to access profiling information for a direct | |
576 // branch. It is a counter, used for counting the number of branches, | |
577 // plus a data displacement, used for realigning the data pointer to | |
578 // the corresponding target bci. | |
579 class JumpData : public ProfileData { | |
580 protected: | |
581 enum { | |
582 taken_off_set, | |
583 displacement_off_set, | |
584 jump_cell_count | |
585 }; | |
586 | |
587 void set_displacement(int displacement) { | |
588 set_int_at(displacement_off_set, displacement); | |
589 } | |
590 | |
591 public: | |
592 JumpData(DataLayout* layout) : ProfileData(layout) { | |
593 assert(layout->tag() == DataLayout::jump_data_tag || | |
594 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
595 } | |
596 | |
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597 virtual bool is_JumpData() const { return true; } |
0 | 598 |
599 static int static_cell_count() { | |
600 return jump_cell_count; | |
601 } | |
602 | |
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603 virtual int cell_count() const { |
0 | 604 return static_cell_count(); |
605 } | |
606 | |
607 // Direct accessor | |
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608 uint taken() const { |
0 | 609 return uint_at(taken_off_set); |
610 } | |
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611 |
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612 void set_taken(uint cnt) { |
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613 set_uint_at(taken_off_set, cnt); |
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614 } |
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615 |
0 | 616 // Saturating counter |
617 uint inc_taken() { | |
618 uint cnt = taken() + 1; | |
619 // Did we wrap? Will compiler screw us?? | |
620 if (cnt == 0) cnt--; | |
621 set_uint_at(taken_off_set, cnt); | |
622 return cnt; | |
623 } | |
624 | |
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625 int displacement() const { |
0 | 626 return int_at(displacement_off_set); |
627 } | |
628 | |
629 // Code generation support | |
630 static ByteSize taken_offset() { | |
631 return cell_offset(taken_off_set); | |
632 } | |
633 | |
634 static ByteSize displacement_offset() { | |
635 return cell_offset(displacement_off_set); | |
636 } | |
637 | |
638 // Specific initialization. | |
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639 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 640 |
641 #ifndef PRODUCT | |
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642 void print_data_on(outputStream* st) const; |
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643 #endif |
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644 }; |
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645 |
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646 // Entries in a ProfileData object to record types: it can either be |
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647 // none (no profile), unknown (conflicting profile data) or a klass if |
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648 // a single one is seen. Whether a null reference was seen is also |
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649 // recorded. No counter is associated with the type and a single type |
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650 // is tracked (unlike VirtualCallData). |
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651 class TypeEntries { |
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652 |
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653 public: |
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654 |
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655 // A single cell is used to record information for a type: |
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656 // - the cell is initialized to 0 |
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657 // - when a type is discovered it is stored in the cell |
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658 // - bit zero of the cell is used to record whether a null reference |
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659 // was encountered or not |
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660 // - bit 1 is set to record a conflict in the type information |
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661 |
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662 enum { |
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663 null_seen = 1, |
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664 type_mask = ~null_seen, |
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665 type_unknown = 2, |
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666 status_bits = null_seen | type_unknown, |
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667 type_klass_mask = ~status_bits |
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668 }; |
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669 |
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670 // what to initialize a cell to |
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671 static intptr_t type_none() { |
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672 return 0; |
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673 } |
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674 |
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675 // null seen = bit 0 set? |
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676 static bool was_null_seen(intptr_t v) { |
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677 return (v & null_seen) != 0; |
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678 } |
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679 |
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680 // conflicting type information = bit 1 set? |
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681 static bool is_type_unknown(intptr_t v) { |
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682 return (v & type_unknown) != 0; |
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683 } |
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684 |
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685 // not type information yet = all bits cleared, ignoring bit 0? |
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686 static bool is_type_none(intptr_t v) { |
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687 return (v & type_mask) == 0; |
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688 } |
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689 |
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690 // recorded type: cell without bit 0 and 1 |
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691 static intptr_t klass_part(intptr_t v) { |
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692 intptr_t r = v & type_klass_mask; |
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693 assert (r != 0, "invalid"); |
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694 return r; |
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|
695 } |
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|
696 |
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697 // type recorded |
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698 static Klass* valid_klass(intptr_t k) { |
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699 if (!is_type_none(k) && |
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700 !is_type_unknown(k)) { |
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701 return (Klass*)klass_part(k); |
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702 } else { |
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703 return NULL; |
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|
704 } |
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|
705 } |
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706 |
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707 static intptr_t with_status(intptr_t k, intptr_t in) { |
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708 return k | (in & status_bits); |
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709 } |
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710 |
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711 static intptr_t with_status(Klass* k, intptr_t in) { |
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712 return with_status((intptr_t)k, in); |
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|
713 } |
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|
714 |
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|
715 #ifndef PRODUCT |
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716 static void print_klass(outputStream* st, intptr_t k); |
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717 #endif |
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718 |
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719 // GC support |
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720 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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721 |
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722 protected: |
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723 // ProfileData object these entries are part of |
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724 ProfileData* _pd; |
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725 // offset within the ProfileData object where the entries start |
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726 const int _base_off; |
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|
727 |
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728 TypeEntries(int base_off) |
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729 : _base_off(base_off), _pd(NULL) {} |
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|
730 |
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731 void set_intptr_at(int index, intptr_t value) { |
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732 _pd->set_intptr_at(index, value); |
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|
733 } |
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|
734 |
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735 intptr_t intptr_at(int index) const { |
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736 return _pd->intptr_at(index); |
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|
737 } |
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|
738 |
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|
739 public: |
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|
740 void set_profile_data(ProfileData* pd) { |
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|
741 _pd = pd; |
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|
742 } |
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|
743 }; |
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|
744 |
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745 // Type entries used for arguments passed at a call and parameters on |
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746 // method entry. 2 cells per entry: one for the type encoded as in |
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747 // TypeEntries and one initialized with the stack slot where the |
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748 // profiled object is to be found so that the interpreter can locate |
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|
749 // it quickly. |
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|
750 class TypeStackSlotEntries : public TypeEntries { |
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|
751 |
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|
752 private: |
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|
753 enum { |
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|
754 stack_slot_entry, |
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|
755 type_entry, |
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|
756 per_arg_cell_count |
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|
757 }; |
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|
758 |
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|
759 // offset of cell for stack slot for entry i within ProfileData object |
12882
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760 int stack_slot_offset(int i) const { |
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761 return _base_off + stack_slot_local_offset(i); |
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|
762 } |
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|
763 |
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|
764 protected: |
12882
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|
765 const int _number_of_entries; |
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|
766 |
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|
767 // offset of cell for type for entry i within ProfileData object |
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768 int type_offset(int i) const { |
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769 return _base_off + type_local_offset(i); |
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|
770 } |
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|
771 |
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|
772 public: |
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|
773 |
12882
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|
774 TypeStackSlotEntries(int base_off, int nb_entries) |
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775 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
776 |
12962
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|
777 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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|
778 |
12962
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|
779 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
12875
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|
780 |
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|
781 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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782 static int stack_slot_local_offset(int i) { |
12882
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783 return i * per_arg_cell_count + stack_slot_entry; |
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|
784 } |
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|
785 |
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|
786 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
787 static int type_local_offset(int i) { |
12882
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788 return i * per_arg_cell_count + type_entry; |
12875
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|
789 } |
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|
790 |
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|
791 // stack slot for entry i |
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|
792 uint stack_slot(int i) const { |
12882
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|
793 assert(i >= 0 && i < _number_of_entries, "oob"); |
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794 return _pd->uint_at(stack_slot_offset(i)); |
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|
795 } |
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|
796 |
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|
797 // set stack slot for entry i |
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|
798 void set_stack_slot(int i, uint num) { |
12882
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|
799 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
800 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
801 } |
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|
802 |
d13d7aba8c12
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|
803 // type for entry i |
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|
804 intptr_t type(int i) const { |
12882
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|
805 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
806 return _pd->intptr_at(type_offset(i)); |
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|
807 } |
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|
808 |
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|
809 // set type for entry i |
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|
810 void set_type(int i, intptr_t k) { |
12882
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|
811 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
812 _pd->set_intptr_at(type_offset(i), k); |
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|
813 } |
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|
814 |
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|
815 static ByteSize per_arg_size() { |
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|
816 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
817 } |
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|
818 |
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|
819 static int per_arg_count() { |
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|
820 return per_arg_cell_count ; |
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|
821 } |
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|
822 |
12882
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|
823 // GC support |
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|
824 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
825 |
ce0cc25bc5e2
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|
826 #ifndef PRODUCT |
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|
827 void print_data_on(outputStream* st) const; |
ce0cc25bc5e2
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|
828 #endif |
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|
829 }; |
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830 |
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831 // Type entry used for return from a call. A single cell to record the |
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832 // type. |
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833 class ReturnTypeEntry : public TypeEntries { |
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834 |
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835 private: |
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836 enum { |
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837 cell_count = 1 |
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838 }; |
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839 |
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840 public: |
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841 ReturnTypeEntry(int base_off) |
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842 : TypeEntries(base_off) {} |
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843 |
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844 void post_initialize() { |
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845 set_type(type_none()); |
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846 } |
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847 |
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848 intptr_t type() const { |
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849 return _pd->intptr_at(_base_off); |
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850 } |
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851 |
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852 void set_type(intptr_t k) { |
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853 _pd->set_intptr_at(_base_off, k); |
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854 } |
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855 |
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856 static int static_cell_count() { |
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857 return cell_count; |
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858 } |
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859 |
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860 static ByteSize size() { |
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861 return in_ByteSize(cell_count * DataLayout::cell_size); |
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862 } |
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863 |
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864 ByteSize type_offset() { |
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865 return DataLayout::cell_offset(_base_off); |
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866 } |
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867 |
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868 // GC support |
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869 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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870 |
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871 #ifndef PRODUCT |
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872 void print_data_on(outputStream* st) const; |
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873 #endif |
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874 }; |
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875 |
12882
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876 // Entries to collect type information at a call: contains arguments |
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877 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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878 // number of cells. Because the number of cells for the return type is |
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879 // smaller than the number of cells for the type of an arguments, the |
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880 // number of cells is used to tell how many arguments are profiled and |
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881 // whether a return value is profiled. See has_arguments() and |
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882 // has_return(). |
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883 class TypeEntriesAtCall { |
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884 private: |
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885 static int stack_slot_local_offset(int i) { |
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886 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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887 } |
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888 |
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889 static int argument_type_local_offset(int i) { |
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890 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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891 } |
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892 |
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893 public: |
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|
894 |
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895 static int header_cell_count() { |
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896 return 1; |
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897 } |
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898 |
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899 static int cell_count_local_offset() { |
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900 return 0; |
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901 } |
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902 |
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903 static int compute_cell_count(BytecodeStream* stream); |
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904 |
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905 static void initialize(DataLayout* dl, int base, int cell_count) { |
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906 int off = base + cell_count_local_offset(); |
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907 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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908 } |
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909 |
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910 static bool arguments_profiling_enabled(); |
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911 static bool return_profiling_enabled(); |
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912 |
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913 // Code generation support |
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914 static ByteSize cell_count_offset() { |
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915 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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916 } |
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917 |
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918 static ByteSize args_data_offset() { |
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919 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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920 } |
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921 |
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922 static ByteSize stack_slot_offset(int i) { |
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923 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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924 } |
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925 |
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926 static ByteSize argument_type_offset(int i) { |
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927 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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928 } |
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929 }; |
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930 |
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931 // CallTypeData |
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932 // |
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933 // A CallTypeData is used to access profiling information about a non |
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934 // virtual call for which we collect type information about arguments |
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935 // and return value. |
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936 class CallTypeData : public CounterData { |
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937 private: |
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938 // entries for arguments if any |
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939 TypeStackSlotEntries _args; |
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940 // entry for return type if any |
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941 ReturnTypeEntry _ret; |
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942 |
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943 int cell_count_global_offset() const { |
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944 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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945 } |
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|
946 |
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947 // number of cells not counting the header |
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948 int cell_count_no_header() const { |
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949 return uint_at(cell_count_global_offset()); |
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950 } |
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951 |
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952 void check_number_of_arguments(int total) { |
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953 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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|
954 } |
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|
955 |
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956 public: |
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957 CallTypeData(DataLayout* layout) : |
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958 CounterData(layout), |
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959 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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960 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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961 { |
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962 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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963 // Some compilers (VC++) don't want this passed in member initialization list |
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964 _args.set_profile_data(this); |
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965 _ret.set_profile_data(this); |
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966 } |
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967 |
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968 const TypeStackSlotEntries* args() const { |
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969 assert(has_arguments(), "no profiling of arguments"); |
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970 return &_args; |
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971 } |
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972 |
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973 const ReturnTypeEntry* ret() const { |
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974 assert(has_return(), "no profiling of return value"); |
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975 return &_ret; |
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976 } |
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977 |
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978 virtual bool is_CallTypeData() const { return true; } |
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979 |
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980 static int static_cell_count() { |
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981 return -1; |
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982 } |
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983 |
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984 static int compute_cell_count(BytecodeStream* stream) { |
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985 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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986 } |
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987 |
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988 static void initialize(DataLayout* dl, int cell_count) { |
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989 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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990 } |
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991 |
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992 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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993 |
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994 virtual int cell_count() const { |
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995 return CounterData::static_cell_count() + |
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996 TypeEntriesAtCall::header_cell_count() + |
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997 int_at_unchecked(cell_count_global_offset()); |
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998 } |
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999 |
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1000 int number_of_arguments() const { |
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1001 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1002 } |
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1003 |
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1004 void set_argument_type(int i, Klass* k) { |
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1005 assert(has_arguments(), "no arguments!"); |
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1006 intptr_t current = _args.type(i); |
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1007 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1008 } |
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1009 |
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1010 void set_return_type(Klass* k) { |
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1011 assert(has_return(), "no return!"); |
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1012 intptr_t current = _ret.type(); |
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1013 _ret.set_type(TypeEntries::with_status(k, current)); |
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1014 } |
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1015 |
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1016 // An entry for a return value takes less space than an entry for an |
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1017 // argument so if the number of cells exceeds the number of cells |
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1018 // needed for an argument, this object contains type information for |
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1019 // at least one argument. |
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1020 bool has_arguments() const { |
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1021 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1022 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1023 return res; |
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1024 } |
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1025 |
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1026 // An entry for a return value takes less space than an entry for an |
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1027 // argument, so if the remainder of the number of cells divided by |
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1028 // the number of cells for an argument is not null, a return value |
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1029 // is profiled in this object. |
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1030 bool has_return() const { |
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1031 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1032 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1033 return res; |
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1034 } |
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1035 |
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1036 // Code generation support |
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1037 static ByteSize args_data_offset() { |
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1038 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1039 } |
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1040 |
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1041 // GC support |
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1042 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1043 if (has_arguments()) { |
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1044 _args.clean_weak_klass_links(is_alive_closure); |
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1045 } |
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1046 if (has_return()) { |
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1047 _ret.clean_weak_klass_links(is_alive_closure); |
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1048 } |
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1049 } |
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1050 |
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1051 #ifndef PRODUCT |
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1052 virtual void print_data_on(outputStream* st) const; |
0 | 1053 #endif |
1054 }; | |
1055 | |
1056 // ReceiverTypeData | |
1057 // | |
1058 // A ReceiverTypeData is used to access profiling information about a | |
1059 // dynamic type check. It consists of a counter which counts the total times | |
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1060 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1061 // which are used to store a type profile for the receiver of the check. |
1062 class ReceiverTypeData : public CounterData { | |
1063 protected: | |
1064 enum { | |
1065 receiver0_offset = counter_cell_count, | |
1066 count0_offset, | |
1067 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1068 }; | |
1069 | |
1070 public: | |
1071 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1072 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1073 layout->tag() == DataLayout::virtual_call_data_tag || |
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1074 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1075 } |
1076 | |
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1077 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1078 |
1079 static int static_cell_count() { | |
1080 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1081 } | |
1082 | |
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1083 virtual int cell_count() const { |
0 | 1084 return static_cell_count(); |
1085 } | |
1086 | |
1087 // Direct accessors | |
1088 static uint row_limit() { | |
1089 return TypeProfileWidth; | |
1090 } | |
1091 static int receiver_cell_index(uint row) { | |
1092 return receiver0_offset + row * receiver_type_row_cell_count; | |
1093 } | |
1094 static int receiver_count_cell_index(uint row) { | |
1095 return count0_offset + row * receiver_type_row_cell_count; | |
1096 } | |
1097 | |
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1098 Klass* receiver(uint row) const { |
0 | 1099 assert(row < row_limit(), "oob"); |
1100 | |
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1101 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1102 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1103 return recv; |
1104 } | |
1105 | |
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1106 void set_receiver(uint row, Klass* k) { |
941 | 1107 assert((uint)row < row_limit(), "oob"); |
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1108 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1109 } |
1110 | |
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1111 uint receiver_count(uint row) const { |
0 | 1112 assert(row < row_limit(), "oob"); |
1113 return uint_at(receiver_count_cell_index(row)); | |
1114 } | |
1115 | |
941 | 1116 void set_receiver_count(uint row, uint count) { |
1117 assert(row < row_limit(), "oob"); | |
1118 set_uint_at(receiver_count_cell_index(row), count); | |
1119 } | |
1120 | |
1121 void clear_row(uint row) { | |
1122 assert(row < row_limit(), "oob"); | |
1251
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1123 // Clear total count - indicator of polymorphic call site. |
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1124 // The site may look like as monomorphic after that but |
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1125 // it allow to have more accurate profiling information because |
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1126 // there was execution phase change since klasses were unloaded. |
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1127 // If the site is still polymorphic then MDO will be updated |
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1128 // to reflect it. But it could be the case that the site becomes |
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1129 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1130 // Even if we use monomorphic (when it is not) for compilation |
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1131 // we will only have trap, deoptimization and recompile again |
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1132 // with updated MDO after executing method in Interpreter. |
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1133 // An additional receiver will be recorded in the cleaned row |
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1134 // during next call execution. |
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1135 // |
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1136 // Note: our profiling logic works with empty rows in any slot. |
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1137 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1138 // |
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1139 set_count(0); |
941 | 1140 set_receiver(row, NULL); |
1141 set_receiver_count(row, 0); | |
1142 } | |
1143 | |
0 | 1144 // Code generation support |
1145 static ByteSize receiver_offset(uint row) { | |
1146 return cell_offset(receiver_cell_index(row)); | |
1147 } | |
1148 static ByteSize receiver_count_offset(uint row) { | |
1149 return cell_offset(receiver_count_cell_index(row)); | |
1150 } | |
1151 static ByteSize receiver_type_data_size() { | |
1152 return cell_offset(static_cell_count()); | |
1153 } | |
1154 | |
1155 // GC support | |
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1156 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1157 |
1158 #ifndef PRODUCT | |
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1159 void print_receiver_data_on(outputStream* st) const; |
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1160 void print_data_on(outputStream* st) const; |
0 | 1161 #endif |
1162 }; | |
1163 | |
1164 // VirtualCallData | |
1165 // | |
1166 // A VirtualCallData is used to access profiling information about a | |
1167 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1168 class VirtualCallData : public ReceiverTypeData { | |
1169 public: | |
1170 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1171 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1172 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1173 } |
1174 | |
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1175 virtual bool is_VirtualCallData() const { return true; } |
0 | 1176 |
1177 static int static_cell_count() { | |
1178 // At this point we could add more profile state, e.g., for arguments. | |
1179 // But for now it's the same size as the base record type. | |
1180 return ReceiverTypeData::static_cell_count(); | |
1181 } | |
1182 | |
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1183 virtual int cell_count() const { |
0 | 1184 return static_cell_count(); |
1185 } | |
1186 | |
1187 // Direct accessors | |
1188 static ByteSize virtual_call_data_size() { | |
1189 return cell_offset(static_cell_count()); | |
1190 } | |
1191 | |
1192 #ifndef PRODUCT | |
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1193 void print_data_on(outputStream* st) const; |
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1194 #endif |
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1195 }; |
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1196 |
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1197 // VirtualCallTypeData |
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1198 // |
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1199 // A VirtualCallTypeData is used to access profiling information about |
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1200 // a virtual call for which we collect type information about |
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1201 // arguments and return value. |
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1202 class VirtualCallTypeData : public VirtualCallData { |
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1203 private: |
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1204 // entries for arguments if any |
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1205 TypeStackSlotEntries _args; |
12882
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1206 // entry for return type if any |
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1207 ReturnTypeEntry _ret; |
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1208 |
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1209 int cell_count_global_offset() const { |
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1210 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1211 } |
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1212 |
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1213 // number of cells not counting the header |
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1214 int cell_count_no_header() const { |
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1215 return uint_at(cell_count_global_offset()); |
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1216 } |
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1217 |
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1218 void check_number_of_arguments(int total) { |
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1219 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1220 } |
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1221 |
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1222 public: |
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1223 VirtualCallTypeData(DataLayout* layout) : |
12882
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1224 VirtualCallData(layout), |
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1225 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1226 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1227 { |
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1228 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1229 // Some compilers (VC++) don't want this passed in member initialization list |
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1230 _args.set_profile_data(this); |
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1231 _ret.set_profile_data(this); |
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1232 } |
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1233 |
12882
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1234 const TypeStackSlotEntries* args() const { |
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1235 assert(has_arguments(), "no profiling of arguments"); |
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1236 return &_args; |
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1237 } |
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1238 |
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1239 const ReturnTypeEntry* ret() const { |
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1240 assert(has_return(), "no profiling of return value"); |
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1241 return &_ret; |
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1242 } |
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1243 |
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1244 virtual bool is_VirtualCallTypeData() const { return true; } |
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1245 |
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1246 static int static_cell_count() { |
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1247 return -1; |
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1248 } |
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1249 |
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1250 static int compute_cell_count(BytecodeStream* stream) { |
12882
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1251 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1252 } |
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1253 |
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1254 static void initialize(DataLayout* dl, int cell_count) { |
12882
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1255 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1256 } |
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1257 |
12882
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1258 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1259 |
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1260 virtual int cell_count() const { |
12882
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1261 return VirtualCallData::static_cell_count() + |
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1262 TypeEntriesAtCall::header_cell_count() + |
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1263 int_at_unchecked(cell_count_global_offset()); |
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1264 } |
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1265 |
12882
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1266 int number_of_arguments() const { |
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1267 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1268 } |
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1269 |
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1270 void set_argument_type(int i, Klass* k) { |
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1271 assert(has_arguments(), "no arguments!"); |
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1272 intptr_t current = _args.type(i); |
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1273 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1274 } |
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1275 |
12882
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1276 void set_return_type(Klass* k) { |
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1277 assert(has_return(), "no return!"); |
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1278 intptr_t current = _ret.type(); |
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1279 _ret.set_type(TypeEntries::with_status(k, current)); |
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1280 } |
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1281 |
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1282 // An entry for a return value takes less space than an entry for an |
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1283 // argument, so if the remainder of the number of cells divided by |
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1284 // the number of cells for an argument is not null, a return value |
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1285 // is profiled in this object. |
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1286 bool has_return() const { |
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1287 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1288 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1289 return res; |
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|
1290 } |
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|
1291 |
12962
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1292 // An entry for a return value takes less space than an entry for an |
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1293 // argument so if the number of cells exceeds the number of cells |
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1294 // needed for an argument, this object contains type information for |
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1295 // at least one argument. |
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1296 bool has_arguments() const { |
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1297 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1298 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1299 return res; |
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1300 } |
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|
1301 |
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1302 // Code generation support |
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1303 static ByteSize args_data_offset() { |
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1304 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1305 } |
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1306 |
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1307 // GC support |
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1308 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1309 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1310 if (has_arguments()) { |
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1311 _args.clean_weak_klass_links(is_alive_closure); |
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1312 } |
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1313 if (has_return()) { |
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1314 _ret.clean_weak_klass_links(is_alive_closure); |
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1315 } |
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1316 } |
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1317 |
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1318 #ifndef PRODUCT |
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1319 virtual void print_data_on(outputStream* st) const; |
0 | 1320 #endif |
1321 }; | |
1322 | |
1323 // RetData | |
1324 // | |
1325 // A RetData is used to access profiling information for a ret bytecode. | |
1326 // It is composed of a count of the number of times that the ret has | |
1327 // been executed, followed by a series of triples of the form | |
1328 // (bci, count, di) which count the number of times that some bci was the | |
1329 // target of the ret and cache a corresponding data displacement. | |
1330 class RetData : public CounterData { | |
1331 protected: | |
1332 enum { | |
1333 bci0_offset = counter_cell_count, | |
1334 count0_offset, | |
1335 displacement0_offset, | |
1336 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1337 }; | |
1338 | |
1339 void set_bci(uint row, int bci) { | |
1340 assert((uint)row < row_limit(), "oob"); | |
1341 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1342 } | |
1343 void release_set_bci(uint row, int bci) { | |
1344 assert((uint)row < row_limit(), "oob"); | |
1345 // 'release' when setting the bci acts as a valid flag for other | |
1346 // threads wrt bci_count and bci_displacement. | |
1347 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1348 } | |
1349 void set_bci_count(uint row, uint count) { | |
1350 assert((uint)row < row_limit(), "oob"); | |
1351 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1352 } | |
1353 void set_bci_displacement(uint row, int disp) { | |
1354 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1355 } | |
1356 | |
1357 public: | |
1358 RetData(DataLayout* layout) : CounterData(layout) { | |
1359 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1360 } | |
1361 | |
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1362 virtual bool is_RetData() const { return true; } |
0 | 1363 |
1364 enum { | |
1365 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1366 }; | |
1367 | |
1368 static int static_cell_count() { | |
1369 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1370 } | |
1371 | |
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1372 virtual int cell_count() const { |
0 | 1373 return static_cell_count(); |
1374 } | |
1375 | |
1376 static uint row_limit() { | |
1377 return BciProfileWidth; | |
1378 } | |
1379 static int bci_cell_index(uint row) { | |
1380 return bci0_offset + row * ret_row_cell_count; | |
1381 } | |
1382 static int bci_count_cell_index(uint row) { | |
1383 return count0_offset + row * ret_row_cell_count; | |
1384 } | |
1385 static int bci_displacement_cell_index(uint row) { | |
1386 return displacement0_offset + row * ret_row_cell_count; | |
1387 } | |
1388 | |
1389 // Direct accessors | |
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1390 int bci(uint row) const { |
0 | 1391 return int_at(bci_cell_index(row)); |
1392 } | |
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1393 uint bci_count(uint row) const { |
0 | 1394 return uint_at(bci_count_cell_index(row)); |
1395 } | |
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1396 int bci_displacement(uint row) const { |
0 | 1397 return int_at(bci_displacement_cell_index(row)); |
1398 } | |
1399 | |
1400 // Interpreter Runtime support | |
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1401 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1402 |
1403 // Code generation support | |
1404 static ByteSize bci_offset(uint row) { | |
1405 return cell_offset(bci_cell_index(row)); | |
1406 } | |
1407 static ByteSize bci_count_offset(uint row) { | |
1408 return cell_offset(bci_count_cell_index(row)); | |
1409 } | |
1410 static ByteSize bci_displacement_offset(uint row) { | |
1411 return cell_offset(bci_displacement_cell_index(row)); | |
1412 } | |
1413 | |
1414 // Specific initialization. | |
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1415 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1416 |
1417 #ifndef PRODUCT | |
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1418 void print_data_on(outputStream* st) const; |
0 | 1419 #endif |
1420 }; | |
1421 | |
1422 // BranchData | |
1423 // | |
1424 // A BranchData is used to access profiling data for a two-way branch. | |
1425 // It consists of taken and not_taken counts as well as a data displacement | |
1426 // for the taken case. | |
1427 class BranchData : public JumpData { | |
1428 protected: | |
1429 enum { | |
1430 not_taken_off_set = jump_cell_count, | |
1431 branch_cell_count | |
1432 }; | |
1433 | |
1434 void set_displacement(int displacement) { | |
1435 set_int_at(displacement_off_set, displacement); | |
1436 } | |
1437 | |
1438 public: | |
1439 BranchData(DataLayout* layout) : JumpData(layout) { | |
1440 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1441 } | |
1442 | |
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1443 virtual bool is_BranchData() const { return true; } |
0 | 1444 |
1445 static int static_cell_count() { | |
1446 return branch_cell_count; | |
1447 } | |
1448 | |
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1449 virtual int cell_count() const { |
0 | 1450 return static_cell_count(); |
1451 } | |
1452 | |
1453 // Direct accessor | |
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1454 uint not_taken() const { |
0 | 1455 return uint_at(not_taken_off_set); |
1456 } | |
1457 | |
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1458 void set_not_taken(uint cnt) { |
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1459 set_uint_at(not_taken_off_set, cnt); |
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1460 } |
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1461 |
0 | 1462 uint inc_not_taken() { |
1463 uint cnt = not_taken() + 1; | |
1464 // Did we wrap? Will compiler screw us?? | |
1465 if (cnt == 0) cnt--; | |
1466 set_uint_at(not_taken_off_set, cnt); | |
1467 return cnt; | |
1468 } | |
1469 | |
1470 // Code generation support | |
1471 static ByteSize not_taken_offset() { | |
1472 return cell_offset(not_taken_off_set); | |
1473 } | |
1474 static ByteSize branch_data_size() { | |
1475 return cell_offset(branch_cell_count); | |
1476 } | |
1477 | |
1478 // Specific initialization. | |
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1479 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1480 |
1481 #ifndef PRODUCT | |
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1482 void print_data_on(outputStream* st) const; |
0 | 1483 #endif |
1484 }; | |
1485 | |
1486 // ArrayData | |
1487 // | |
1488 // A ArrayData is a base class for accessing profiling data which does | |
1489 // not have a statically known size. It consists of an array length | |
1490 // and an array start. | |
1491 class ArrayData : public ProfileData { | |
1492 protected: | |
1493 friend class DataLayout; | |
1494 | |
1495 enum { | |
1496 array_len_off_set, | |
1497 array_start_off_set | |
1498 }; | |
1499 | |
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1500 uint array_uint_at(int index) const { |
0 | 1501 int aindex = index + array_start_off_set; |
1502 return uint_at(aindex); | |
1503 } | |
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1504 int array_int_at(int index) const { |
0 | 1505 int aindex = index + array_start_off_set; |
1506 return int_at(aindex); | |
1507 } | |
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1508 oop array_oop_at(int index) const { |
0 | 1509 int aindex = index + array_start_off_set; |
1510 return oop_at(aindex); | |
1511 } | |
1512 void array_set_int_at(int index, int value) { | |
1513 int aindex = index + array_start_off_set; | |
1514 set_int_at(aindex, value); | |
1515 } | |
1516 | |
1517 // Code generation support for subclasses. | |
1518 static ByteSize array_element_offset(int index) { | |
1519 return cell_offset(array_start_off_set + index); | |
1520 } | |
1521 | |
1522 public: | |
1523 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1524 | |
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1525 virtual bool is_ArrayData() const { return true; } |
0 | 1526 |
1527 static int static_cell_count() { | |
1528 return -1; | |
1529 } | |
1530 | |
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1531 int array_len() const { |
0 | 1532 return int_at_unchecked(array_len_off_set); |
1533 } | |
1534 | |
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1535 virtual int cell_count() const { |
0 | 1536 return array_len() + 1; |
1537 } | |
1538 | |
1539 // Code generation support | |
1540 static ByteSize array_len_offset() { | |
1541 return cell_offset(array_len_off_set); | |
1542 } | |
1543 static ByteSize array_start_offset() { | |
1544 return cell_offset(array_start_off_set); | |
1545 } | |
1546 }; | |
1547 | |
1548 // MultiBranchData | |
1549 // | |
1550 // A MultiBranchData is used to access profiling information for | |
1551 // a multi-way branch (*switch bytecodes). It consists of a series | |
1552 // of (count, displacement) pairs, which count the number of times each | |
1553 // case was taken and specify the data displacment for each branch target. | |
1554 class MultiBranchData : public ArrayData { | |
1555 protected: | |
1556 enum { | |
1557 default_count_off_set, | |
1558 default_disaplacement_off_set, | |
1559 case_array_start | |
1560 }; | |
1561 enum { | |
1562 relative_count_off_set, | |
1563 relative_displacement_off_set, | |
1564 per_case_cell_count | |
1565 }; | |
1566 | |
1567 void set_default_displacement(int displacement) { | |
1568 array_set_int_at(default_disaplacement_off_set, displacement); | |
1569 } | |
1570 void set_displacement_at(int index, int displacement) { | |
1571 array_set_int_at(case_array_start + | |
1572 index * per_case_cell_count + | |
1573 relative_displacement_off_set, | |
1574 displacement); | |
1575 } | |
1576 | |
1577 public: | |
1578 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1579 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1580 } | |
1581 | |
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1582 virtual bool is_MultiBranchData() const { return true; } |
0 | 1583 |
1584 static int compute_cell_count(BytecodeStream* stream); | |
1585 | |
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1586 int number_of_cases() const { |
0 | 1587 int alen = array_len() - 2; // get rid of default case here. |
1588 assert(alen % per_case_cell_count == 0, "must be even"); | |
1589 return (alen / per_case_cell_count); | |
1590 } | |
1591 | |
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1592 uint default_count() const { |
0 | 1593 return array_uint_at(default_count_off_set); |
1594 } | |
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1595 int default_displacement() const { |
0 | 1596 return array_int_at(default_disaplacement_off_set); |
1597 } | |
1598 | |
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1599 uint count_at(int index) const { |
0 | 1600 return array_uint_at(case_array_start + |
1601 index * per_case_cell_count + | |
1602 relative_count_off_set); | |
1603 } | |
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1604 int displacement_at(int index) const { |
0 | 1605 return array_int_at(case_array_start + |
1606 index * per_case_cell_count + | |
1607 relative_displacement_off_set); | |
1608 } | |
1609 | |
1610 // Code generation support | |
1611 static ByteSize default_count_offset() { | |
1612 return array_element_offset(default_count_off_set); | |
1613 } | |
1614 static ByteSize default_displacement_offset() { | |
1615 return array_element_offset(default_disaplacement_off_set); | |
1616 } | |
1617 static ByteSize case_count_offset(int index) { | |
1618 return case_array_offset() + | |
1619 (per_case_size() * index) + | |
1620 relative_count_offset(); | |
1621 } | |
1622 static ByteSize case_array_offset() { | |
1623 return array_element_offset(case_array_start); | |
1624 } | |
1625 static ByteSize per_case_size() { | |
1626 return in_ByteSize(per_case_cell_count) * cell_size; | |
1627 } | |
1628 static ByteSize relative_count_offset() { | |
1629 return in_ByteSize(relative_count_off_set) * cell_size; | |
1630 } | |
1631 static ByteSize relative_displacement_offset() { | |
1632 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1633 } | |
1634 | |
1635 // Specific initialization. | |
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1636 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1637 |
1638 #ifndef PRODUCT | |
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1639 void print_data_on(outputStream* st) const; |
0 | 1640 #endif |
1641 }; | |
1642 | |
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1643 class ArgInfoData : public ArrayData { |
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1644 |
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1645 public: |
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1646 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1647 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1648 } |
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1649 |
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1650 virtual bool is_ArgInfoData() const { return true; } |
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1651 |
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1652 |
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1653 int number_of_args() const { |
45
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1654 return array_len(); |
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1655 } |
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1656 |
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1657 uint arg_modified(int arg) const { |
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1658 return array_uint_at(arg); |
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1659 } |
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1660 |
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1661 void set_arg_modified(int arg, uint val) { |
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1662 array_set_int_at(arg, val); |
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1663 } |
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1664 |
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1665 #ifndef PRODUCT |
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1666 void print_data_on(outputStream* st) const; |
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1667 #endif |
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1668 }; |
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1669 |
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1670 // ParametersTypeData |
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1671 // |
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1672 // A ParametersTypeData is used to access profiling information about |
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1673 // types of parameters to a method |
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1674 class ParametersTypeData : public ArrayData { |
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1675 |
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1676 private: |
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1677 TypeStackSlotEntries _parameters; |
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1678 |
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1679 static int stack_slot_local_offset(int i) { |
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1680 assert_profiling_enabled(); |
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1681 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1682 } |
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1683 |
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1684 static int type_local_offset(int i) { |
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1685 assert_profiling_enabled(); |
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1686 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1687 } |
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1688 |
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1689 static bool profiling_enabled(); |
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1690 static void assert_profiling_enabled() { |
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1691 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1692 } |
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1693 |
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1694 public: |
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1695 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1696 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1697 // Some compilers (VC++) don't want this passed in member initialization list |
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1698 _parameters.set_profile_data(this); |
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1699 } |
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1700 |
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1701 static int compute_cell_count(Method* m); |
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1702 |
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1703 virtual bool is_ParametersTypeData() const { return true; } |
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1704 |
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1705 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1706 |
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1707 int number_of_parameters() const { |
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1708 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1709 } |
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1710 |
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1711 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1712 |
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1713 uint stack_slot(int i) const { |
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1714 return _parameters.stack_slot(i); |
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1715 } |
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1716 |
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1717 void set_type(int i, Klass* k) { |
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1718 intptr_t current = _parameters.type(i); |
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1719 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1720 } |
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1721 |
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1722 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1723 _parameters.clean_weak_klass_links(is_alive_closure); |
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1724 } |
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1725 |
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1726 #ifndef PRODUCT |
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1727 virtual void print_data_on(outputStream* st) const; |
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1728 #endif |
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1729 |
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1730 static ByteSize stack_slot_offset(int i) { |
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1731 return cell_offset(stack_slot_local_offset(i)); |
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1732 } |
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1733 |
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1734 static ByteSize type_offset(int i) { |
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1735 return cell_offset(type_local_offset(i)); |
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1736 } |
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1737 }; |
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1738 |
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1739 // MethodData* |
0 | 1740 // |
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1741 // A MethodData* holds information which has been collected about |
0 | 1742 // a method. Its layout looks like this: |
1743 // | |
1744 // ----------------------------- | |
1745 // | header | | |
1746 // | klass | | |
1747 // ----------------------------- | |
1748 // | method | | |
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1749 // | size of the MethodData* | |
0 | 1750 // ----------------------------- |
1751 // | Data entries... | | |
1752 // | (variable size) | | |
1753 // | | | |
1754 // . . | |
1755 // . . | |
1756 // . . | |
1757 // | | | |
1758 // ----------------------------- | |
1759 // | |
1760 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1761 // DataLayout in the array corresponds to a specific bytecode in the | |
1762 // method. The entries in the array are sorted by the corresponding | |
1763 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1764 // which point to the underlying blocks of DataLayout structures. | |
1765 // | |
1766 // During interpretation, if profiling in enabled, the interpreter | |
1767 // maintains a method data pointer (mdp), which points at the entry | |
1768 // in the array corresponding to the current bci. In the course of | |
1769 // intepretation, when a bytecode is encountered that has profile data | |
1770 // associated with it, the entry pointed to by mdp is updated, then the | |
1771 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1772 // is NULL to begin with, the interpreter assumes that the current method | |
1773 // is not (yet) being profiled. | |
1774 // | |
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1775 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1776 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1777 // from the base of the data entry array. A "displacement" is the byte offset | |
1778 // in certain ProfileData objects that indicate the amount the mdp must be | |
1779 // adjusted in the event of a change in control flow. | |
1780 // | |
1781 | |
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1782 class MethodData : public Metadata { |
0 | 1783 friend class VMStructs; |
1784 private: | |
1785 friend class ProfileData; | |
1786 | |
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1787 // Back pointer to the Method* |
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1788 Method* _method; |
0 | 1789 |
1790 // Size of this oop in bytes | |
1791 int _size; | |
1792 | |
1793 // Cached hint for bci_to_dp and bci_to_data | |
1794 int _hint_di; | |
1795 | |
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1796 MethodData(methodHandle method, int size, TRAPS); |
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1797 public: |
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1798 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1799 MethodData() {}; // For ciMethodData |
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1800 |
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1801 bool is_methodData() const volatile { return true; } |
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1802 |
0 | 1803 // Whole-method sticky bits and flags |
1804 enum { | |
3345 | 1805 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1806 _trap_hist_mask = max_jubyte, |
1807 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1808 }; // Public flag values | |
1809 private: | |
1810 uint _nof_decompiles; // count of all nmethod removals | |
1811 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1812 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1813 union { | |
1814 intptr_t _align; | |
1815 u1 _array[_trap_hist_limit]; | |
1816 } _trap_hist; | |
1817 | |
1818 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1819 intx _eflags; // flags on escape information | |
1820 intx _arg_local; // bit set of non-escaping arguments | |
1821 intx _arg_stack; // bit set of stack-allocatable arguments | |
1822 intx _arg_returned; // bit set of returned arguments | |
1823 | |
1783 | 1824 int _creation_mileage; // method mileage at MDO creation |
1825 | |
1826 // How many invocations has this MDO seen? | |
1827 // These counters are used to determine the exact age of MDO. | |
1828 // We need those because in tiered a method can be concurrently | |
1829 // executed at different levels. | |
1830 InvocationCounter _invocation_counter; | |
1831 // Same for backedges. | |
1832 InvocationCounter _backedge_counter; | |
2252 | 1833 // Counter values at the time profiling started. |
1834 int _invocation_counter_start; | |
1835 int _backedge_counter_start; | |
1783 | 1836 // Number of loops and blocks is computed when compiling the first |
1837 // time with C1. It is used to determine if method is trivial. | |
1838 short _num_loops; | |
1839 short _num_blocks; | |
1840 // Highest compile level this method has ever seen. | |
1841 u1 _highest_comp_level; | |
1842 // Same for OSR level | |
1843 u1 _highest_osr_comp_level; | |
1844 // Does this method contain anything worth profiling? | |
1845 bool _would_profile; | |
0 | 1846 |
1847 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1848 int _data_size; | |
1849 | |
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1850 // data index for the area dedicated to parameters. -1 if no |
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1851 // parameter profiling. |
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1852 int _parameters_type_data_di; |
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1853 |
0 | 1854 // Beginning of the data entries |
1855 intptr_t _data[1]; | |
1856 | |
1857 // Helper for size computation | |
1858 static int compute_data_size(BytecodeStream* stream); | |
1859 static int bytecode_cell_count(Bytecodes::Code code); | |
1860 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1861 | |
1862 // Helper for initialization | |
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1863 DataLayout* data_layout_at(int data_index) const { |
0 | 1864 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1865 return (DataLayout*) (((address)_data) + data_index); | |
1866 } | |
1867 | |
1868 // Initialize an individual data segment. Returns the size of | |
1869 // the segment in bytes. | |
1870 int initialize_data(BytecodeStream* stream, int data_index); | |
1871 | |
1872 // Helper for data_at | |
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1873 DataLayout* limit_data_position() const { |
0 | 1874 return (DataLayout*)((address)data_base() + _data_size); |
1875 } | |
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1876 bool out_of_bounds(int data_index) const { |
0 | 1877 return data_index >= data_size(); |
1878 } | |
1879 | |
1880 // Give each of the data entries a chance to perform specific | |
1881 // data initialization. | |
1882 void post_initialize(BytecodeStream* stream); | |
1883 | |
1884 // hint accessors | |
1885 int hint_di() const { return _hint_di; } | |
1886 void set_hint_di(int di) { | |
1887 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1888 _hint_di = di; | |
1889 } | |
1890 ProfileData* data_before(int bci) { | |
1891 // avoid SEGV on this edge case | |
1892 if (data_size() == 0) | |
1893 return NULL; | |
1894 int hint = hint_di(); | |
1895 if (data_layout_at(hint)->bci() <= bci) | |
1896 return data_at(hint); | |
1897 return first_data(); | |
1898 } | |
1899 | |
1900 // What is the index of the first data entry? | |
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1901 int first_di() const { return 0; } |
0 | 1902 |
1903 // Find or create an extra ProfileData: | |
1904 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1905 | |
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1906 // return the argument info cell |
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1907 ArgInfoData *arg_info(); |
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1908 |
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1909 enum { |
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1910 no_type_profile = 0, |
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1911 type_profile_jsr292 = 1, |
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1912 type_profile_all = 2 |
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1913 }; |
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1914 |
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1915 static bool profile_jsr292(methodHandle m, int bci); |
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1916 static int profile_arguments_flag(); |
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1917 static bool profile_arguments_jsr292_only(); |
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1918 static bool profile_all_arguments(); |
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1919 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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1920 static int profile_return_flag(); |
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1921 static bool profile_all_return(); |
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1922 static bool profile_return_for_invoke(methodHandle m, int bci); |
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1923 static int profile_parameters_flag(); |
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1924 static bool profile_parameters_jsr292_only(); |
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1925 static bool profile_all_parameters(); |
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1926 |
0 | 1927 public: |
1928 static int header_size() { | |
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1929 return sizeof(MethodData)/wordSize; |
0 | 1930 } |
1931 | |
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1932 // Compute the size of a MethodData* before it is created. |
0 | 1933 static int compute_allocation_size_in_bytes(methodHandle method); |
1934 static int compute_allocation_size_in_words(methodHandle method); | |
1935 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1936 | |
1937 // Determine if a given bytecode can have profile information. | |
1938 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1939 return bytecode_cell_count(code) != no_profile_data; | |
1940 } | |
1941 | |
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1942 // reset into original state |
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1943 void init(); |
0 | 1944 |
1945 // My size | |
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1946 int size_in_bytes() const { return _size; } |
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1947 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1948 #if INCLUDE_SERVICES |
1949 void collect_statistics(KlassSizeStats *sz) const; | |
1950 #endif | |
0 | 1951 |
1952 int creation_mileage() const { return _creation_mileage; } | |
1953 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1954 |
1955 int invocation_count() { | |
1956 if (invocation_counter()->carry()) { | |
1957 return InvocationCounter::count_limit; | |
1958 } | |
1959 return invocation_counter()->count(); | |
1960 } | |
1961 int backedge_count() { | |
1962 if (backedge_counter()->carry()) { | |
1963 return InvocationCounter::count_limit; | |
1964 } | |
1965 return backedge_counter()->count(); | |
1966 } | |
1967 | |
2252 | 1968 int invocation_count_start() { |
1969 if (invocation_counter()->carry()) { | |
1970 return 0; | |
1971 } | |
1972 return _invocation_counter_start; | |
1973 } | |
1974 | |
1975 int backedge_count_start() { | |
1976 if (backedge_counter()->carry()) { | |
1977 return 0; | |
1978 } | |
1979 return _backedge_counter_start; | |
1980 } | |
1981 | |
1982 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1983 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1984 | |
1985 void reset_start_counters() { | |
1986 _invocation_counter_start = invocation_count(); | |
1987 _backedge_counter_start = backedge_count(); | |
1988 } | |
1989 | |
1783 | 1990 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1991 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1992 | |
1993 void set_would_profile(bool p) { _would_profile = p; } | |
1994 bool would_profile() const { return _would_profile; } | |
1995 | |
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1996 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 1997 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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1998 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 1999 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2000 | |
2001 int num_loops() const { return _num_loops; } | |
2002 void set_num_loops(int n) { _num_loops = n; } | |
2003 int num_blocks() const { return _num_blocks; } | |
2004 void set_num_blocks(int n) { _num_blocks = n; } | |
2005 | |
0 | 2006 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2007 static int mileage_of(Method* m); |
0 | 2008 |
2009 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2010 enum EscapeFlag { | |
2011 estimated = 1 << 0, | |
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2012 return_local = 1 << 1, |
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2013 return_allocated = 1 << 2, |
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2014 allocated_escapes = 1 << 3, |
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2015 unknown_modified = 1 << 4 |
0 | 2016 }; |
2017 | |
2018 intx eflags() { return _eflags; } | |
2019 intx arg_local() { return _arg_local; } | |
2020 intx arg_stack() { return _arg_stack; } | |
2021 intx arg_returned() { return _arg_returned; } | |
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2022 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2023 assert(aid != NULL, "arg_info must be not null"); |
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2024 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2025 return aid->arg_modified(a); } |
0 | 2026 |
2027 void set_eflags(intx v) { _eflags = v; } | |
2028 void set_arg_local(intx v) { _arg_local = v; } | |
2029 void set_arg_stack(intx v) { _arg_stack = v; } | |
2030 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2031 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2032 assert(aid != NULL, "arg_info must be not null"); |
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2033 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2034 aid->set_arg_modified(a, v); } |
0 | 2035 |
2036 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2037 | |
2038 // Location and size of data area | |
2039 address data_base() const { | |
2040 return (address) _data; | |
2041 } | |
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2042 int data_size() const { |
0 | 2043 return _data_size; |
2044 } | |
2045 | |
2046 // Accessors | |
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2047 Method* method() const { return _method; } |
0 | 2048 |
2049 // Get the data at an arbitrary (sort of) data index. | |
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2050 ProfileData* data_at(int data_index) const; |
0 | 2051 |
2052 // Walk through the data in order. | |
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2053 ProfileData* first_data() const { return data_at(first_di()); } |
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2054 ProfileData* next_data(ProfileData* current) const; |
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2055 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2056 |
2057 // Convert a dp (data pointer) to a di (data index). | |
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2058 int dp_to_di(address dp) const { |
0 | 2059 return dp - ((address)_data); |
2060 } | |
2061 | |
2062 address di_to_dp(int di) { | |
2063 return (address)data_layout_at(di); | |
2064 } | |
2065 | |
2066 // bci to di/dp conversion. | |
2067 address bci_to_dp(int bci); | |
2068 int bci_to_di(int bci) { | |
2069 return dp_to_di(bci_to_dp(bci)); | |
2070 } | |
2071 | |
2072 // Get the data at an arbitrary bci, or NULL if there is none. | |
2073 ProfileData* bci_to_data(int bci); | |
2074 | |
2075 // Same, but try to create an extra_data record if one is needed: | |
2076 ProfileData* allocate_bci_to_data(int bci) { | |
2077 ProfileData* data = bci_to_data(bci); | |
2078 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
2079 } | |
2080 | |
2081 // Add a handful of extra data records, for trap tracking. | |
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2082 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2083 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2084 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2085 - (address)extra_data_base(); } |
2086 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2087 | |
2088 // Return (uint)-1 for overflow. | |
2089 uint trap_count(int reason) const { | |
2090 assert((uint)reason < _trap_hist_limit, "oob"); | |
2091 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2092 } | |
2093 // For loops: | |
2094 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2095 static uint trap_count_limit() { return _trap_hist_mask; } | |
2096 uint inc_trap_count(int reason) { | |
2097 // Count another trap, anywhere in this method. | |
2098 assert(reason >= 0, "must be single trap"); | |
2099 if ((uint)reason < _trap_hist_limit) { | |
2100 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2101 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2102 _trap_hist._array[reason] = cnt1; | |
2103 return cnt1; | |
2104 } else { | |
2105 return _trap_hist_mask + (++_nof_overflow_traps); | |
2106 } | |
2107 } else { | |
2108 // Could not represent the count in the histogram. | |
2109 return (++_nof_overflow_traps); | |
2110 } | |
2111 } | |
2112 | |
2113 uint overflow_trap_count() const { | |
2114 return _nof_overflow_traps; | |
2115 } | |
2116 uint overflow_recompile_count() const { | |
2117 return _nof_overflow_recompiles; | |
2118 } | |
2119 void inc_overflow_recompile_count() { | |
2120 _nof_overflow_recompiles += 1; | |
2121 } | |
2122 uint decompile_count() const { | |
2123 return _nof_decompiles; | |
2124 } | |
2125 void inc_decompile_count() { | |
2126 _nof_decompiles += 1; | |
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2127 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2128 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2129 } |
0 | 2130 } |
2131 | |
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2132 // Return pointer to area dedicated to parameters in MDO |
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2133 ParametersTypeData* parameters_type_data() const { |
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2134 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2135 } |
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2136 |
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2137 int parameters_type_data_di() const { |
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2138 assert(_parameters_type_data_di != -1, "no args type data"); |
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2139 return _parameters_type_data_di; |
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2140 } |
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2141 |
0 | 2142 // Support for code generation |
2143 static ByteSize data_offset() { | |
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2144 return byte_offset_of(MethodData, _data[0]); |
0 | 2145 } |
2146 | |
1783 | 2147 static ByteSize invocation_counter_offset() { |
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2148 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2149 } |
2150 static ByteSize backedge_counter_offset() { | |
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2151 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2152 } |
2153 | |
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2154 static ByteSize parameters_type_data_di_offset() { |
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2155 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2156 } |
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2157 |
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2158 // Deallocation support - no pointer fields to deallocate |
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2159 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2160 |
0 | 2161 // GC support |
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2162 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2163 |
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2164 // Printing |
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2165 #ifndef PRODUCT |
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2166 void print_on (outputStream* st) const; |
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2167 #endif |
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2168 void print_value_on(outputStream* st) const; |
0 | 2169 |
2170 #ifndef PRODUCT | |
2171 // printing support for method data | |
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2172 void print_data_on(outputStream* st) const; |
0 | 2173 #endif |
2174 | |
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2175 const char* internal_name() const { return "{method data}"; } |
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2176 |
0 | 2177 // verification |
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2178 void verify_on(outputStream* st); |
0 | 2179 void verify_data_on(outputStream* st); |
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2180 |
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2181 static bool profile_parameters_for_method(methodHandle m); |
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2182 static bool profile_arguments(); |
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2183 static bool profile_return(); |
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2184 static bool profile_parameters(); |
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8026054: New type profiling points: type of return values at calls
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parents:
12875
diff
changeset
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2185 static bool profile_return_jsr292_only(); |
0 | 2186 }; |
1972 | 2187 |
2188 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |