Mercurial > hg > graal-compiler
annotate src/share/vm/oops/methodData.hpp @ 13086:096c224171c4
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 20 Nov 2013 00:10:38 +0100 |
parents | cefad50507d8 6e1826d5c23e |
children | d84fa69a9874 |
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) | |
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490 null_seen_flag = DataLayout::first_flag + 0 |
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491 #ifdef GRAAL |
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492 // bytecode threw any exception |
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493 , exception_seen_flag = null_seen_flag + 1 |
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494 #endif |
0 | 495 }; |
496 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
497 public: | |
498 BitData(DataLayout* layout) : ProfileData(layout) { | |
499 } | |
500 | |
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501 virtual bool is_BitData() const { return true; } |
0 | 502 |
503 static int static_cell_count() { | |
504 return bit_cell_count; | |
505 } | |
506 | |
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507 virtual int cell_count() const { |
0 | 508 return static_cell_count(); |
509 } | |
510 | |
511 // Accessor | |
512 | |
513 // The null_seen flag bit is specially known to the interpreter. | |
514 // Consulting it allows the compiler to avoid setting up null_check traps. | |
515 bool null_seen() { return flag_at(null_seen_flag); } | |
516 void set_null_seen() { set_flag_at(null_seen_flag); } | |
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517 #ifdef GRAAL |
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518 // true if an exception was thrown at the specific BCI |
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519 bool exception_seen() { return flag_at(exception_seen_flag); } |
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520 void set_exception_seen() { set_flag_at(exception_seen_flag); } |
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521 #endif |
0 | 522 |
523 // Code generation support | |
524 static int null_seen_byte_constant() { | |
525 return flag_number_to_byte_constant(null_seen_flag); | |
526 } | |
527 | |
528 static ByteSize bit_data_size() { | |
529 return cell_offset(bit_cell_count); | |
530 } | |
531 | |
532 #ifndef PRODUCT | |
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533 void print_data_on(outputStream* st) const; |
0 | 534 #endif |
535 }; | |
536 | |
537 // CounterData | |
538 // | |
539 // A CounterData corresponds to a simple counter. | |
540 class CounterData : public BitData { | |
541 protected: | |
542 enum { | |
543 count_off, | |
544 counter_cell_count | |
545 }; | |
546 public: | |
547 CounterData(DataLayout* layout) : BitData(layout) {} | |
548 | |
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549 virtual bool is_CounterData() const { return true; } |
0 | 550 |
551 static int static_cell_count() { | |
552 return counter_cell_count; | |
553 } | |
554 | |
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555 virtual int cell_count() const { |
0 | 556 return static_cell_count(); |
557 } | |
558 | |
559 // Direct accessor | |
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560 uint count() const { |
0 | 561 return uint_at(count_off); |
562 } | |
563 | |
564 // Code generation support | |
565 static ByteSize count_offset() { | |
566 return cell_offset(count_off); | |
567 } | |
568 static ByteSize counter_data_size() { | |
569 return cell_offset(counter_cell_count); | |
570 } | |
571 | |
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572 void set_count(uint count) { |
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573 set_uint_at(count_off, count); |
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574 } |
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575 |
0 | 576 #ifndef PRODUCT |
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577 void print_data_on(outputStream* st) const; |
0 | 578 #endif |
579 }; | |
580 | |
581 // JumpData | |
582 // | |
583 // A JumpData is used to access profiling information for a direct | |
584 // branch. It is a counter, used for counting the number of branches, | |
585 // plus a data displacement, used for realigning the data pointer to | |
586 // the corresponding target bci. | |
587 class JumpData : public ProfileData { | |
588 protected: | |
589 enum { | |
590 taken_off_set, | |
591 displacement_off_set, | |
592 jump_cell_count | |
593 }; | |
594 | |
595 void set_displacement(int displacement) { | |
596 set_int_at(displacement_off_set, displacement); | |
597 } | |
598 | |
599 public: | |
600 JumpData(DataLayout* layout) : ProfileData(layout) { | |
601 assert(layout->tag() == DataLayout::jump_data_tag || | |
602 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
603 } | |
604 | |
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605 virtual bool is_JumpData() const { return true; } |
0 | 606 |
607 static int static_cell_count() { | |
608 return jump_cell_count; | |
609 } | |
610 | |
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611 virtual int cell_count() const { |
0 | 612 return static_cell_count(); |
613 } | |
614 | |
615 // Direct accessor | |
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616 uint taken() const { |
0 | 617 return uint_at(taken_off_set); |
618 } | |
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619 |
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620 void set_taken(uint cnt) { |
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621 set_uint_at(taken_off_set, cnt); |
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622 } |
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623 |
0 | 624 // Saturating counter |
625 uint inc_taken() { | |
626 uint cnt = taken() + 1; | |
627 // Did we wrap? Will compiler screw us?? | |
628 if (cnt == 0) cnt--; | |
629 set_uint_at(taken_off_set, cnt); | |
630 return cnt; | |
631 } | |
632 | |
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633 int displacement() const { |
0 | 634 return int_at(displacement_off_set); |
635 } | |
636 | |
637 // Code generation support | |
638 static ByteSize taken_offset() { | |
639 return cell_offset(taken_off_set); | |
640 } | |
641 | |
642 static ByteSize displacement_offset() { | |
643 return cell_offset(displacement_off_set); | |
644 } | |
645 | |
646 // Specific initialization. | |
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647 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 648 |
649 #ifndef PRODUCT | |
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650 void print_data_on(outputStream* st) const; |
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651 #endif |
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652 }; |
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653 |
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654 // Entries in a ProfileData object to record types: it can either be |
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655 // none (no profile), unknown (conflicting profile data) or a klass if |
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656 // a single one is seen. Whether a null reference was seen is also |
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657 // recorded. No counter is associated with the type and a single type |
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658 // is tracked (unlike VirtualCallData). |
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659 class TypeEntries { |
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660 |
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661 public: |
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662 |
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663 // A single cell is used to record information for a type: |
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664 // - the cell is initialized to 0 |
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665 // - when a type is discovered it is stored in the cell |
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666 // - bit zero of the cell is used to record whether a null reference |
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667 // was encountered or not |
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668 // - bit 1 is set to record a conflict in the type information |
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669 |
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670 enum { |
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671 null_seen = 1, |
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672 type_mask = ~null_seen, |
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673 type_unknown = 2, |
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674 status_bits = null_seen | type_unknown, |
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675 type_klass_mask = ~status_bits |
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676 }; |
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677 |
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678 // what to initialize a cell to |
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679 static intptr_t type_none() { |
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680 return 0; |
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681 } |
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682 |
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683 // null seen = bit 0 set? |
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684 static bool was_null_seen(intptr_t v) { |
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685 return (v & null_seen) != 0; |
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686 } |
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687 |
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688 // conflicting type information = bit 1 set? |
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689 static bool is_type_unknown(intptr_t v) { |
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690 return (v & type_unknown) != 0; |
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|
691 } |
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|
692 |
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693 // not type information yet = all bits cleared, ignoring bit 0? |
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694 static bool is_type_none(intptr_t v) { |
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695 return (v & type_mask) == 0; |
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|
696 } |
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|
697 |
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698 // recorded type: cell without bit 0 and 1 |
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699 static intptr_t klass_part(intptr_t v) { |
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700 intptr_t r = v & type_klass_mask; |
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701 return r; |
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|
702 } |
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|
703 |
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|
704 // type recorded |
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705 static Klass* valid_klass(intptr_t k) { |
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706 if (!is_type_none(k) && |
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707 !is_type_unknown(k)) { |
13080 | 708 Klass* res = (Klass*)klass_part(k); |
709 assert(res != NULL, "invalid"); | |
710 return res; | |
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711 } else { |
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712 return NULL; |
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|
713 } |
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|
714 } |
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|
715 |
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716 static intptr_t with_status(intptr_t k, intptr_t in) { |
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717 return k | (in & status_bits); |
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|
718 } |
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|
719 |
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720 static intptr_t with_status(Klass* k, intptr_t in) { |
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721 return with_status((intptr_t)k, in); |
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|
722 } |
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|
723 |
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|
724 #ifndef PRODUCT |
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725 static void print_klass(outputStream* st, intptr_t k); |
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726 #endif |
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727 |
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|
728 // GC support |
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729 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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|
730 |
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|
731 protected: |
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732 // ProfileData object these entries are part of |
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733 ProfileData* _pd; |
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734 // offset within the ProfileData object where the entries start |
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735 const int _base_off; |
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|
736 |
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|
737 TypeEntries(int base_off) |
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738 : _base_off(base_off), _pd(NULL) {} |
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|
739 |
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740 void set_intptr_at(int index, intptr_t value) { |
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741 _pd->set_intptr_at(index, value); |
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|
742 } |
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|
743 |
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|
744 intptr_t intptr_at(int index) const { |
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|
745 return _pd->intptr_at(index); |
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|
746 } |
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|
747 |
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|
748 public: |
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|
749 void set_profile_data(ProfileData* pd) { |
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|
750 _pd = pd; |
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|
751 } |
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|
752 }; |
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|
753 |
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|
754 // Type entries used for arguments passed at a call and parameters on |
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|
755 // method entry. 2 cells per entry: one for the type encoded as in |
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|
756 // TypeEntries and one initialized with the stack slot where the |
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|
757 // profiled object is to be found so that the interpreter can locate |
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|
758 // it quickly. |
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|
759 class TypeStackSlotEntries : public TypeEntries { |
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|
760 |
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|
761 private: |
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|
762 enum { |
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|
763 stack_slot_entry, |
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|
764 type_entry, |
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|
765 per_arg_cell_count |
d13d7aba8c12
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|
766 }; |
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|
767 |
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|
768 // offset of cell for stack slot for entry i within ProfileData object |
12882
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769 int stack_slot_offset(int i) const { |
12875
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770 return _base_off + stack_slot_local_offset(i); |
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|
771 } |
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|
772 |
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|
773 protected: |
12882
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|
774 const int _number_of_entries; |
12875
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|
775 |
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|
776 // offset of cell for type for entry i within ProfileData object |
12882
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|
777 int type_offset(int i) const { |
12875
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778 return _base_off + type_local_offset(i); |
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|
779 } |
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|
780 |
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|
781 public: |
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|
782 |
12882
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|
783 TypeStackSlotEntries(int base_off, int nb_entries) |
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784 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
12875
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|
785 |
12962
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|
786 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
12875
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|
787 |
12962
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|
788 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
12875
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|
789 |
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|
790 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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|
791 static int stack_slot_local_offset(int i) { |
12882
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792 return i * per_arg_cell_count + stack_slot_entry; |
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|
793 } |
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|
794 |
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|
795 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
796 static int type_local_offset(int i) { |
12882
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|
797 return i * per_arg_cell_count + type_entry; |
12875
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|
798 } |
d13d7aba8c12
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|
799 |
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|
800 // stack slot for entry i |
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|
801 uint stack_slot(int i) const { |
12882
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|
802 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
803 return _pd->uint_at(stack_slot_offset(i)); |
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|
804 } |
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|
805 |
d13d7aba8c12
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|
806 // set stack slot for entry i |
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|
807 void set_stack_slot(int i, uint num) { |
12882
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|
808 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
809 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
810 } |
d13d7aba8c12
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|
811 |
d13d7aba8c12
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|
812 // type for entry i |
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|
813 intptr_t type(int i) const { |
12882
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|
814 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
815 return _pd->intptr_at(type_offset(i)); |
12875
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|
816 } |
d13d7aba8c12
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|
817 |
d13d7aba8c12
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|
818 // set type for entry i |
d13d7aba8c12
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|
819 void set_type(int i, intptr_t k) { |
12882
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|
820 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
821 _pd->set_intptr_at(type_offset(i), k); |
12875
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|
822 } |
d13d7aba8c12
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|
823 |
d13d7aba8c12
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|
824 static ByteSize per_arg_size() { |
d13d7aba8c12
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diff
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|
825 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
d13d7aba8c12
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|
826 } |
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|
827 |
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828 static int per_arg_count() { |
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829 return per_arg_cell_count ; |
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830 } |
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831 |
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832 // GC support |
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833 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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834 |
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835 #ifndef PRODUCT |
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836 void print_data_on(outputStream* st) const; |
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837 #endif |
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838 }; |
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839 |
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840 // Type entry used for return from a call. A single cell to record the |
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841 // type. |
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842 class ReturnTypeEntry : public TypeEntries { |
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843 |
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844 private: |
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845 enum { |
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846 cell_count = 1 |
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847 }; |
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848 |
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849 public: |
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850 ReturnTypeEntry(int base_off) |
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851 : TypeEntries(base_off) {} |
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852 |
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853 void post_initialize() { |
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854 set_type(type_none()); |
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855 } |
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856 |
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857 intptr_t type() const { |
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858 return _pd->intptr_at(_base_off); |
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859 } |
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860 |
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861 void set_type(intptr_t k) { |
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862 _pd->set_intptr_at(_base_off, k); |
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863 } |
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864 |
12882
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865 static int static_cell_count() { |
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866 return cell_count; |
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867 } |
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868 |
12882
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869 static ByteSize size() { |
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870 return in_ByteSize(cell_count * DataLayout::cell_size); |
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871 } |
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|
872 |
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873 ByteSize type_offset() { |
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874 return DataLayout::cell_offset(_base_off); |
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875 } |
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|
876 |
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877 // GC support |
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878 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
879 |
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|
880 #ifndef PRODUCT |
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881 void print_data_on(outputStream* st) const; |
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882 #endif |
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883 }; |
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|
884 |
12882
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885 // Entries to collect type information at a call: contains arguments |
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886 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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887 // number of cells. Because the number of cells for the return type is |
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888 // smaller than the number of cells for the type of an arguments, the |
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889 // number of cells is used to tell how many arguments are profiled and |
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890 // whether a return value is profiled. See has_arguments() and |
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891 // has_return(). |
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892 class TypeEntriesAtCall { |
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|
893 private: |
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894 static int stack_slot_local_offset(int i) { |
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895 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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896 } |
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|
897 |
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898 static int argument_type_local_offset(int i) { |
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899 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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900 } |
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|
901 |
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|
902 public: |
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|
903 |
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|
904 static int header_cell_count() { |
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905 return 1; |
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|
906 } |
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|
907 |
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908 static int cell_count_local_offset() { |
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909 return 0; |
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|
910 } |
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|
911 |
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912 static int compute_cell_count(BytecodeStream* stream); |
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|
913 |
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914 static void initialize(DataLayout* dl, int base, int cell_count) { |
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915 int off = base + cell_count_local_offset(); |
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916 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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917 } |
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|
918 |
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919 static bool arguments_profiling_enabled(); |
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920 static bool return_profiling_enabled(); |
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921 |
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922 // Code generation support |
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923 static ByteSize cell_count_offset() { |
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924 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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925 } |
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|
926 |
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927 static ByteSize args_data_offset() { |
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928 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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929 } |
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|
930 |
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931 static ByteSize stack_slot_offset(int i) { |
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932 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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933 } |
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|
934 |
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935 static ByteSize argument_type_offset(int i) { |
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936 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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937 } |
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|
938 }; |
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|
939 |
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940 // CallTypeData |
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941 // |
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942 // A CallTypeData is used to access profiling information about a non |
12882
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943 // virtual call for which we collect type information about arguments |
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944 // and return value. |
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945 class CallTypeData : public CounterData { |
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|
946 private: |
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947 // entries for arguments if any |
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948 TypeStackSlotEntries _args; |
12882
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949 // entry for return type if any |
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950 ReturnTypeEntry _ret; |
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|
951 |
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952 int cell_count_global_offset() const { |
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953 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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|
954 } |
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|
955 |
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|
956 // number of cells not counting the header |
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957 int cell_count_no_header() const { |
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958 return uint_at(cell_count_global_offset()); |
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|
959 } |
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|
960 |
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961 void check_number_of_arguments(int total) { |
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962 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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963 } |
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964 |
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965 public: |
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966 CallTypeData(DataLayout* layout) : |
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967 CounterData(layout), |
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968 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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969 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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970 { |
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971 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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972 // Some compilers (VC++) don't want this passed in member initialization list |
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973 _args.set_profile_data(this); |
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974 _ret.set_profile_data(this); |
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975 } |
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976 |
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977 const TypeStackSlotEntries* args() const { |
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978 assert(has_arguments(), "no profiling of arguments"); |
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979 return &_args; |
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980 } |
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981 |
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982 const ReturnTypeEntry* ret() const { |
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983 assert(has_return(), "no profiling of return value"); |
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984 return &_ret; |
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985 } |
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986 |
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987 virtual bool is_CallTypeData() const { return true; } |
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988 |
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989 static int static_cell_count() { |
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990 return -1; |
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991 } |
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992 |
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993 static int compute_cell_count(BytecodeStream* stream) { |
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994 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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995 } |
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996 |
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997 static void initialize(DataLayout* dl, int cell_count) { |
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998 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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999 } |
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1000 |
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1001 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1002 |
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1003 virtual int cell_count() const { |
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1004 return CounterData::static_cell_count() + |
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1005 TypeEntriesAtCall::header_cell_count() + |
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1006 int_at_unchecked(cell_count_global_offset()); |
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1007 } |
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1008 |
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1009 int number_of_arguments() const { |
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1010 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1011 } |
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1012 |
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1013 void set_argument_type(int i, Klass* k) { |
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1014 assert(has_arguments(), "no arguments!"); |
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1015 intptr_t current = _args.type(i); |
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1016 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1017 } |
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1018 |
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1019 void set_return_type(Klass* k) { |
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1020 assert(has_return(), "no return!"); |
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1021 intptr_t current = _ret.type(); |
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1022 _ret.set_type(TypeEntries::with_status(k, current)); |
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1023 } |
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1024 |
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1025 // An entry for a return value takes less space than an entry for an |
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1026 // argument so if the number of cells exceeds the number of cells |
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1027 // needed for an argument, this object contains type information for |
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1028 // at least one argument. |
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1029 bool has_arguments() const { |
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1030 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1031 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1032 return res; |
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1033 } |
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1034 |
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1035 // An entry for a return value takes less space than an entry for an |
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1036 // argument, so if the remainder of the number of cells divided by |
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1037 // the number of cells for an argument is not null, a return value |
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1038 // is profiled in this object. |
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1039 bool has_return() const { |
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1040 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1041 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1042 return res; |
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1043 } |
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1044 |
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1045 // Code generation support |
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1046 static ByteSize args_data_offset() { |
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1047 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1048 } |
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1049 |
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1050 // GC support |
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1051 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1052 if (has_arguments()) { |
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1053 _args.clean_weak_klass_links(is_alive_closure); |
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1054 } |
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1055 if (has_return()) { |
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1056 _ret.clean_weak_klass_links(is_alive_closure); |
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1057 } |
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1058 } |
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1059 |
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1060 #ifndef PRODUCT |
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1061 virtual void print_data_on(outputStream* st) const; |
0 | 1062 #endif |
1063 }; | |
1064 | |
1065 // ReceiverTypeData | |
1066 // | |
1067 // A ReceiverTypeData is used to access profiling information about a | |
1068 // dynamic type check. It consists of a counter which counts the total times | |
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1069 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1070 // which are used to store a type profile for the receiver of the check. |
1071 class ReceiverTypeData : public CounterData { | |
1072 protected: | |
1073 enum { | |
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1074 #ifdef GRAAL |
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1075 // Description of the different counters |
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1076 // ReceiverTypeData for instanceof/checkcast/aastore: |
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1077 // C1/C2: count is incremented on type overflow and decremented for failed type checks |
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1078 // Graal: count decremented for failed type checks and nonprofiled_count is incremented on type overflow |
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1079 // TODO (chaeubl): in fact, Graal should also increment the count for failed type checks to mimic the C1/C2 behavior |
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1080 // VirtualCallData for invokevirtual/invokeinterface: |
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1081 // C1/C2: count is incremented on type overflow |
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1082 // Graal: count is incremented on type overflow, nonprofiled_count is increment on method overflow |
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1083 |
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1084 // Graal is interested in knowing the percentage of type checks involving a type not explicitly in the profile |
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1085 nonprofiled_count_off_set = counter_cell_count, |
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1086 receiver0_offset, |
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1087 #else |
0 | 1088 receiver0_offset = counter_cell_count, |
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1089 #endif |
0 | 1090 count0_offset, |
1091 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1092 }; | |
1093 | |
1094 public: | |
1095 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1096 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1097 layout->tag() == DataLayout::virtual_call_data_tag || |
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1098 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1099 } |
1100 | |
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1101 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1102 |
1103 static int static_cell_count() { | |
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1104 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
0 | 1105 } |
1106 | |
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1107 virtual int cell_count() const { |
0 | 1108 return static_cell_count(); |
1109 } | |
1110 | |
1111 // Direct accessors | |
1112 static uint row_limit() { | |
1113 return TypeProfileWidth; | |
1114 } | |
1115 static int receiver_cell_index(uint row) { | |
1116 return receiver0_offset + row * receiver_type_row_cell_count; | |
1117 } | |
1118 static int receiver_count_cell_index(uint row) { | |
1119 return count0_offset + row * receiver_type_row_cell_count; | |
1120 } | |
1121 | |
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1122 Klass* receiver(uint row) const { |
0 | 1123 assert(row < row_limit(), "oob"); |
1124 | |
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1125 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1126 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1127 return recv; |
1128 } | |
1129 | |
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1130 void set_receiver(uint row, Klass* k) { |
941 | 1131 assert((uint)row < row_limit(), "oob"); |
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1132 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1133 } |
1134 | |
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1135 uint receiver_count(uint row) const { |
0 | 1136 assert(row < row_limit(), "oob"); |
1137 return uint_at(receiver_count_cell_index(row)); | |
1138 } | |
1139 | |
941 | 1140 void set_receiver_count(uint row, uint count) { |
1141 assert(row < row_limit(), "oob"); | |
1142 set_uint_at(receiver_count_cell_index(row), count); | |
1143 } | |
1144 | |
1145 void clear_row(uint row) { | |
1146 assert(row < row_limit(), "oob"); | |
1251
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1147 // Clear total count - indicator of polymorphic call site. |
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1148 // The site may look like as monomorphic after that but |
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1149 // it allow to have more accurate profiling information because |
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1150 // there was execution phase change since klasses were unloaded. |
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1151 // If the site is still polymorphic then MDO will be updated |
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1152 // to reflect it. But it could be the case that the site becomes |
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1153 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1154 // Even if we use monomorphic (when it is not) for compilation |
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1155 // we will only have trap, deoptimization and recompile again |
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1156 // with updated MDO after executing method in Interpreter. |
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1157 // An additional receiver will be recorded in the cleaned row |
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1158 // during next call execution. |
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1159 // |
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1160 // Note: our profiling logic works with empty rows in any slot. |
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1161 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1162 // |
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1163 set_count(0); |
941 | 1164 set_receiver(row, NULL); |
1165 set_receiver_count(row, 0); | |
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1166 #ifdef GRAAL |
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1167 if (!this->is_VirtualCallData()) { |
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1168 // if this is a ReceiverTypeData for Graal, the nonprofiled_count |
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1169 // must also be reset (see "Description of the different counters" above) |
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1170 set_nonprofiled_count(0); |
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1171 } |
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1172 #endif |
941 | 1173 } |
1174 | |
0 | 1175 // Code generation support |
1176 static ByteSize receiver_offset(uint row) { | |
1177 return cell_offset(receiver_cell_index(row)); | |
1178 } | |
1179 static ByteSize receiver_count_offset(uint row) { | |
1180 return cell_offset(receiver_count_cell_index(row)); | |
1181 } | |
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1182 #ifdef GRAAL |
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1183 static ByteSize nonprofiled_receiver_count_offset() { |
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1184 return cell_offset(nonprofiled_count_off_set); |
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1185 } |
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1186 void set_nonprofiled_count(uint count) { |
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1187 set_uint_at(nonprofiled_count_off_set, count); |
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1188 } |
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1189 #endif |
0 | 1190 static ByteSize receiver_type_data_size() { |
1191 return cell_offset(static_cell_count()); | |
1192 } | |
1193 | |
1194 // GC support | |
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1195 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1196 |
1197 #ifndef PRODUCT | |
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1198 void print_receiver_data_on(outputStream* st) const; |
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1199 void print_data_on(outputStream* st) const; |
0 | 1200 #endif |
1201 }; | |
1202 | |
1203 // VirtualCallData | |
1204 // | |
1205 // A VirtualCallData is used to access profiling information about a | |
1206 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1207 class VirtualCallData : public ReceiverTypeData { | |
1208 public: | |
1209 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1210 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1211 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1212 } |
1213 | |
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1214 virtual bool is_VirtualCallData() const { return true; } |
0 | 1215 |
1216 static int static_cell_count() { | |
1217 // At this point we could add more profile state, e.g., for arguments. | |
1218 // But for now it's the same size as the base record type. | |
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1219 return ReceiverTypeData::static_cell_count() GRAAL_ONLY(+ (uint) MethodProfileWidth * receiver_type_row_cell_count); |
0 | 1220 } |
1221 | |
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1222 virtual int cell_count() const { |
0 | 1223 return static_cell_count(); |
1224 } | |
1225 | |
1226 // Direct accessors | |
1227 static ByteSize virtual_call_data_size() { | |
1228 return cell_offset(static_cell_count()); | |
1229 } | |
1230 | |
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1231 #ifdef GRAAL |
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1232 static ByteSize method_offset(uint row) { |
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1233 return cell_offset(method_cell_index(row)); |
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1234 } |
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1235 static ByteSize method_count_offset(uint row) { |
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1236 return cell_offset(method_count_cell_index(row)); |
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1237 } |
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1238 static int method_cell_index(uint row) { |
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1239 return receiver0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1240 } |
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1241 static int method_count_cell_index(uint row) { |
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1242 return count0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1243 } |
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1244 static uint method_row_limit() { |
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1245 return MethodProfileWidth; |
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1246 } |
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1247 |
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1248 Method* method(uint row) { |
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1249 assert(row < method_row_limit(), "oob"); |
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1250 |
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1251 Method* method = (Method*)intptr_at(method_cell_index(row)); |
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1252 assert(method == NULL || method->is_method(), "must be"); |
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1253 return method; |
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1254 } |
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1255 |
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1256 void set_method(uint row, Method* m) { |
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1257 assert((uint)row < method_row_limit(), "oob"); |
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1258 set_intptr_at(method_cell_index(row), (uintptr_t)m); |
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1259 } |
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1260 |
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1261 void set_method_count(uint row, uint count) { |
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1262 assert(row < method_row_limit(), "oob"); |
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1263 set_uint_at(method_count_cell_index(row), count); |
0 | 1264 } |
1265 | |
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1266 void clear_method_row(uint row) { |
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1267 assert(row < method_row_limit(), "oob"); |
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1268 // Clear total count - indicator of polymorphic call site (see comment for clear_row() in ReceiverTypeData). |
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1269 set_nonprofiled_count(0); |
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1270 set_method(row, NULL); |
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1271 set_method_count(row, 0); |
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1272 } |
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1273 |
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1274 // GC support |
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1275 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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1276 #endif |
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1277 |
0 | 1278 #ifndef PRODUCT |
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1279 void print_data_on(outputStream* st) const; |
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1280 #endif |
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1281 }; |
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1282 |
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1283 // VirtualCallTypeData |
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1284 // |
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1285 // A VirtualCallTypeData is used to access profiling information about |
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1286 // a virtual call for which we collect type information about |
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1287 // arguments and return value. |
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1288 class VirtualCallTypeData : public VirtualCallData { |
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1289 private: |
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1290 // entries for arguments if any |
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1291 TypeStackSlotEntries _args; |
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1292 // entry for return type if any |
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1293 ReturnTypeEntry _ret; |
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1294 |
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1295 int cell_count_global_offset() const { |
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1296 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1297 } |
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1298 |
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1299 // number of cells not counting the header |
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1300 int cell_count_no_header() const { |
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1301 return uint_at(cell_count_global_offset()); |
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1302 } |
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1303 |
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1304 void check_number_of_arguments(int total) { |
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1305 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1306 } |
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1307 |
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1308 public: |
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1309 VirtualCallTypeData(DataLayout* layout) : |
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1310 VirtualCallData(layout), |
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1311 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1312 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1313 { |
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1314 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1315 // Some compilers (VC++) don't want this passed in member initialization list |
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1316 _args.set_profile_data(this); |
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1317 _ret.set_profile_data(this); |
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1318 } |
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1319 |
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1320 const TypeStackSlotEntries* args() const { |
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1321 assert(has_arguments(), "no profiling of arguments"); |
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1322 return &_args; |
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1323 } |
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1324 |
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1325 const ReturnTypeEntry* ret() const { |
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1326 assert(has_return(), "no profiling of return value"); |
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1327 return &_ret; |
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1328 } |
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1329 |
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1330 virtual bool is_VirtualCallTypeData() const { return true; } |
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1331 |
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1332 static int static_cell_count() { |
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1333 return -1; |
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1334 } |
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1335 |
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1336 static int compute_cell_count(BytecodeStream* stream) { |
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1337 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1338 } |
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1339 |
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1340 static void initialize(DataLayout* dl, int cell_count) { |
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1341 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1342 } |
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1343 |
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1344 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1345 |
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1346 virtual int cell_count() const { |
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1347 return VirtualCallData::static_cell_count() + |
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1348 TypeEntriesAtCall::header_cell_count() + |
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1349 int_at_unchecked(cell_count_global_offset()); |
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1350 } |
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1351 |
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1352 int number_of_arguments() const { |
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1353 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1354 } |
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1355 |
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1356 void set_argument_type(int i, Klass* k) { |
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1357 assert(has_arguments(), "no arguments!"); |
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1358 intptr_t current = _args.type(i); |
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1359 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1360 } |
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1361 |
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1362 void set_return_type(Klass* k) { |
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1363 assert(has_return(), "no return!"); |
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1364 intptr_t current = _ret.type(); |
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1365 _ret.set_type(TypeEntries::with_status(k, current)); |
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1366 } |
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1367 |
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1368 // An entry for a return value takes less space than an entry for an |
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1369 // argument, so if the remainder of the number of cells divided by |
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1370 // the number of cells for an argument is not null, a return value |
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1371 // is profiled in this object. |
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1372 bool has_return() const { |
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1373 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1374 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1375 return res; |
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1376 } |
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1377 |
12962
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1378 // An entry for a return value takes less space than an entry for an |
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1379 // argument so if the number of cells exceeds the number of cells |
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1380 // needed for an argument, this object contains type information for |
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1381 // at least one argument. |
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1382 bool has_arguments() const { |
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1383 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1384 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1385 return res; |
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1386 } |
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1387 |
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1388 // Code generation support |
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1389 static ByteSize args_data_offset() { |
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1390 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1391 } |
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1392 |
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1393 // GC support |
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1394 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1395 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1396 if (has_arguments()) { |
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1397 _args.clean_weak_klass_links(is_alive_closure); |
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1398 } |
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1399 if (has_return()) { |
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1400 _ret.clean_weak_klass_links(is_alive_closure); |
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1401 } |
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1402 } |
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1403 |
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1404 #ifndef PRODUCT |
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1405 virtual void print_data_on(outputStream* st) const; |
0 | 1406 #endif |
1407 }; | |
1408 | |
1409 // RetData | |
1410 // | |
1411 // A RetData is used to access profiling information for a ret bytecode. | |
1412 // It is composed of a count of the number of times that the ret has | |
1413 // been executed, followed by a series of triples of the form | |
1414 // (bci, count, di) which count the number of times that some bci was the | |
1415 // target of the ret and cache a corresponding data displacement. | |
1416 class RetData : public CounterData { | |
1417 protected: | |
1418 enum { | |
1419 bci0_offset = counter_cell_count, | |
1420 count0_offset, | |
1421 displacement0_offset, | |
1422 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1423 }; | |
1424 | |
1425 void set_bci(uint row, int bci) { | |
1426 assert((uint)row < row_limit(), "oob"); | |
1427 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1428 } | |
1429 void release_set_bci(uint row, int bci) { | |
1430 assert((uint)row < row_limit(), "oob"); | |
1431 // 'release' when setting the bci acts as a valid flag for other | |
1432 // threads wrt bci_count and bci_displacement. | |
1433 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1434 } | |
1435 void set_bci_count(uint row, uint count) { | |
1436 assert((uint)row < row_limit(), "oob"); | |
1437 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1438 } | |
1439 void set_bci_displacement(uint row, int disp) { | |
1440 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1441 } | |
1442 | |
1443 public: | |
1444 RetData(DataLayout* layout) : CounterData(layout) { | |
1445 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1446 } | |
1447 | |
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1448 virtual bool is_RetData() const { return true; } |
0 | 1449 |
1450 enum { | |
1451 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1452 }; | |
1453 | |
1454 static int static_cell_count() { | |
1455 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1456 } | |
1457 | |
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1458 virtual int cell_count() const { |
0 | 1459 return static_cell_count(); |
1460 } | |
1461 | |
1462 static uint row_limit() { | |
1463 return BciProfileWidth; | |
1464 } | |
1465 static int bci_cell_index(uint row) { | |
1466 return bci0_offset + row * ret_row_cell_count; | |
1467 } | |
1468 static int bci_count_cell_index(uint row) { | |
1469 return count0_offset + row * ret_row_cell_count; | |
1470 } | |
1471 static int bci_displacement_cell_index(uint row) { | |
1472 return displacement0_offset + row * ret_row_cell_count; | |
1473 } | |
1474 | |
1475 // Direct accessors | |
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1476 int bci(uint row) const { |
0 | 1477 return int_at(bci_cell_index(row)); |
1478 } | |
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1479 uint bci_count(uint row) const { |
0 | 1480 return uint_at(bci_count_cell_index(row)); |
1481 } | |
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1482 int bci_displacement(uint row) const { |
0 | 1483 return int_at(bci_displacement_cell_index(row)); |
1484 } | |
1485 | |
1486 // Interpreter Runtime support | |
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1487 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1488 |
1489 // Code generation support | |
1490 static ByteSize bci_offset(uint row) { | |
1491 return cell_offset(bci_cell_index(row)); | |
1492 } | |
1493 static ByteSize bci_count_offset(uint row) { | |
1494 return cell_offset(bci_count_cell_index(row)); | |
1495 } | |
1496 static ByteSize bci_displacement_offset(uint row) { | |
1497 return cell_offset(bci_displacement_cell_index(row)); | |
1498 } | |
1499 | |
1500 // Specific initialization. | |
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1501 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1502 |
1503 #ifndef PRODUCT | |
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1504 void print_data_on(outputStream* st) const; |
0 | 1505 #endif |
1506 }; | |
1507 | |
1508 // BranchData | |
1509 // | |
1510 // A BranchData is used to access profiling data for a two-way branch. | |
1511 // It consists of taken and not_taken counts as well as a data displacement | |
1512 // for the taken case. | |
1513 class BranchData : public JumpData { | |
1514 protected: | |
1515 enum { | |
1516 not_taken_off_set = jump_cell_count, | |
1517 branch_cell_count | |
1518 }; | |
1519 | |
1520 void set_displacement(int displacement) { | |
1521 set_int_at(displacement_off_set, displacement); | |
1522 } | |
1523 | |
1524 public: | |
1525 BranchData(DataLayout* layout) : JumpData(layout) { | |
1526 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1527 } | |
1528 | |
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1529 virtual bool is_BranchData() const { return true; } |
0 | 1530 |
1531 static int static_cell_count() { | |
1532 return branch_cell_count; | |
1533 } | |
1534 | |
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1535 virtual int cell_count() const { |
0 | 1536 return static_cell_count(); |
1537 } | |
1538 | |
1539 // Direct accessor | |
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1540 uint not_taken() const { |
0 | 1541 return uint_at(not_taken_off_set); |
1542 } | |
1543 | |
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1544 void set_not_taken(uint cnt) { |
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1545 set_uint_at(not_taken_off_set, cnt); |
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1546 } |
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1547 |
0 | 1548 uint inc_not_taken() { |
1549 uint cnt = not_taken() + 1; | |
1550 // Did we wrap? Will compiler screw us?? | |
1551 if (cnt == 0) cnt--; | |
1552 set_uint_at(not_taken_off_set, cnt); | |
1553 return cnt; | |
1554 } | |
1555 | |
1556 // Code generation support | |
1557 static ByteSize not_taken_offset() { | |
1558 return cell_offset(not_taken_off_set); | |
1559 } | |
1560 static ByteSize branch_data_size() { | |
1561 return cell_offset(branch_cell_count); | |
1562 } | |
1563 | |
1564 // Specific initialization. | |
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1565 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1566 |
1567 #ifndef PRODUCT | |
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1568 void print_data_on(outputStream* st) const; |
0 | 1569 #endif |
1570 }; | |
1571 | |
1572 // ArrayData | |
1573 // | |
1574 // A ArrayData is a base class for accessing profiling data which does | |
1575 // not have a statically known size. It consists of an array length | |
1576 // and an array start. | |
1577 class ArrayData : public ProfileData { | |
1578 protected: | |
1579 friend class DataLayout; | |
1580 | |
1581 enum { | |
1582 array_len_off_set, | |
1583 array_start_off_set | |
1584 }; | |
1585 | |
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1586 uint array_uint_at(int index) const { |
0 | 1587 int aindex = index + array_start_off_set; |
1588 return uint_at(aindex); | |
1589 } | |
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1590 int array_int_at(int index) const { |
0 | 1591 int aindex = index + array_start_off_set; |
1592 return int_at(aindex); | |
1593 } | |
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1594 oop array_oop_at(int index) const { |
0 | 1595 int aindex = index + array_start_off_set; |
1596 return oop_at(aindex); | |
1597 } | |
1598 void array_set_int_at(int index, int value) { | |
1599 int aindex = index + array_start_off_set; | |
1600 set_int_at(aindex, value); | |
1601 } | |
1602 | |
1603 // Code generation support for subclasses. | |
1604 static ByteSize array_element_offset(int index) { | |
1605 return cell_offset(array_start_off_set + index); | |
1606 } | |
1607 | |
1608 public: | |
1609 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1610 | |
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1611 virtual bool is_ArrayData() const { return true; } |
0 | 1612 |
1613 static int static_cell_count() { | |
1614 return -1; | |
1615 } | |
1616 | |
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1617 int array_len() const { |
0 | 1618 return int_at_unchecked(array_len_off_set); |
1619 } | |
1620 | |
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1621 virtual int cell_count() const { |
0 | 1622 return array_len() + 1; |
1623 } | |
1624 | |
1625 // Code generation support | |
1626 static ByteSize array_len_offset() { | |
1627 return cell_offset(array_len_off_set); | |
1628 } | |
1629 static ByteSize array_start_offset() { | |
1630 return cell_offset(array_start_off_set); | |
1631 } | |
1632 }; | |
1633 | |
1634 // MultiBranchData | |
1635 // | |
1636 // A MultiBranchData is used to access profiling information for | |
1637 // a multi-way branch (*switch bytecodes). It consists of a series | |
1638 // of (count, displacement) pairs, which count the number of times each | |
1639 // case was taken and specify the data displacment for each branch target. | |
1640 class MultiBranchData : public ArrayData { | |
1641 protected: | |
1642 enum { | |
1643 default_count_off_set, | |
1644 default_disaplacement_off_set, | |
1645 case_array_start | |
1646 }; | |
1647 enum { | |
1648 relative_count_off_set, | |
1649 relative_displacement_off_set, | |
1650 per_case_cell_count | |
1651 }; | |
1652 | |
1653 void set_default_displacement(int displacement) { | |
1654 array_set_int_at(default_disaplacement_off_set, displacement); | |
1655 } | |
1656 void set_displacement_at(int index, int displacement) { | |
1657 array_set_int_at(case_array_start + | |
1658 index * per_case_cell_count + | |
1659 relative_displacement_off_set, | |
1660 displacement); | |
1661 } | |
1662 | |
1663 public: | |
1664 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1665 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1666 } | |
1667 | |
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1668 virtual bool is_MultiBranchData() const { return true; } |
0 | 1669 |
1670 static int compute_cell_count(BytecodeStream* stream); | |
1671 | |
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1672 int number_of_cases() const { |
0 | 1673 int alen = array_len() - 2; // get rid of default case here. |
1674 assert(alen % per_case_cell_count == 0, "must be even"); | |
1675 return (alen / per_case_cell_count); | |
1676 } | |
1677 | |
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1678 uint default_count() const { |
0 | 1679 return array_uint_at(default_count_off_set); |
1680 } | |
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1681 int default_displacement() const { |
0 | 1682 return array_int_at(default_disaplacement_off_set); |
1683 } | |
1684 | |
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1685 uint count_at(int index) const { |
0 | 1686 return array_uint_at(case_array_start + |
1687 index * per_case_cell_count + | |
1688 relative_count_off_set); | |
1689 } | |
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1690 int displacement_at(int index) const { |
0 | 1691 return array_int_at(case_array_start + |
1692 index * per_case_cell_count + | |
1693 relative_displacement_off_set); | |
1694 } | |
1695 | |
1696 // Code generation support | |
1697 static ByteSize default_count_offset() { | |
1698 return array_element_offset(default_count_off_set); | |
1699 } | |
1700 static ByteSize default_displacement_offset() { | |
1701 return array_element_offset(default_disaplacement_off_set); | |
1702 } | |
1703 static ByteSize case_count_offset(int index) { | |
1704 return case_array_offset() + | |
1705 (per_case_size() * index) + | |
1706 relative_count_offset(); | |
1707 } | |
1708 static ByteSize case_array_offset() { | |
1709 return array_element_offset(case_array_start); | |
1710 } | |
1711 static ByteSize per_case_size() { | |
1712 return in_ByteSize(per_case_cell_count) * cell_size; | |
1713 } | |
1714 static ByteSize relative_count_offset() { | |
1715 return in_ByteSize(relative_count_off_set) * cell_size; | |
1716 } | |
1717 static ByteSize relative_displacement_offset() { | |
1718 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1719 } | |
1720 | |
1721 // Specific initialization. | |
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1722 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1723 |
1724 #ifndef PRODUCT | |
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1725 void print_data_on(outputStream* st) const; |
0 | 1726 #endif |
1727 }; | |
1728 | |
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1729 class ArgInfoData : public ArrayData { |
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1730 |
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1731 public: |
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1732 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1733 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1734 } |
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1735 |
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1736 virtual bool is_ArgInfoData() const { return true; } |
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1737 |
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1738 |
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1739 int number_of_args() const { |
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1740 return array_len(); |
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1741 } |
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1742 |
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1743 uint arg_modified(int arg) const { |
45
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1744 return array_uint_at(arg); |
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1745 } |
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1746 |
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1747 void set_arg_modified(int arg, uint val) { |
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1748 array_set_int_at(arg, val); |
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1749 } |
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1750 |
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1751 #ifndef PRODUCT |
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1752 void print_data_on(outputStream* st) const; |
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1753 #endif |
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1754 }; |
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1755 |
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1756 // ParametersTypeData |
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1757 // |
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1758 // A ParametersTypeData is used to access profiling information about |
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1759 // types of parameters to a method |
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1760 class ParametersTypeData : public ArrayData { |
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1761 |
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1762 private: |
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1763 TypeStackSlotEntries _parameters; |
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1764 |
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1765 static int stack_slot_local_offset(int i) { |
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1766 assert_profiling_enabled(); |
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1767 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1768 } |
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1769 |
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1770 static int type_local_offset(int i) { |
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1771 assert_profiling_enabled(); |
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1772 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1773 } |
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1774 |
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1775 static bool profiling_enabled(); |
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1776 static void assert_profiling_enabled() { |
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1777 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1778 } |
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1779 |
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1780 public: |
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1781 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1782 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1783 // Some compilers (VC++) don't want this passed in member initialization list |
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1784 _parameters.set_profile_data(this); |
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1785 } |
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1786 |
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1787 static int compute_cell_count(Method* m); |
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1788 |
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1789 virtual bool is_ParametersTypeData() const { return true; } |
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1790 |
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1791 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1792 |
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1793 int number_of_parameters() const { |
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1794 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1795 } |
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1796 |
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1797 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1798 |
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1799 uint stack_slot(int i) const { |
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1800 return _parameters.stack_slot(i); |
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1801 } |
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1802 |
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1803 void set_type(int i, Klass* k) { |
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1804 intptr_t current = _parameters.type(i); |
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1805 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1806 } |
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1807 |
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1808 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1809 _parameters.clean_weak_klass_links(is_alive_closure); |
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1810 } |
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1811 |
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1812 #ifndef PRODUCT |
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1813 virtual void print_data_on(outputStream* st) const; |
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1814 #endif |
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1815 |
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1816 static ByteSize stack_slot_offset(int i) { |
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1817 return cell_offset(stack_slot_local_offset(i)); |
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1818 } |
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1819 |
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1820 static ByteSize type_offset(int i) { |
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1821 return cell_offset(type_local_offset(i)); |
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1822 } |
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1823 }; |
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1824 |
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1825 // MethodData* |
0 | 1826 // |
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1827 // A MethodData* holds information which has been collected about |
0 | 1828 // a method. Its layout looks like this: |
1829 // | |
1830 // ----------------------------- | |
1831 // | header | | |
1832 // | klass | | |
1833 // ----------------------------- | |
1834 // | method | | |
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1835 // | size of the MethodData* | |
0 | 1836 // ----------------------------- |
1837 // | Data entries... | | |
1838 // | (variable size) | | |
1839 // | | | |
1840 // . . | |
1841 // . . | |
1842 // . . | |
1843 // | | | |
1844 // ----------------------------- | |
1845 // | |
1846 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1847 // DataLayout in the array corresponds to a specific bytecode in the | |
1848 // method. The entries in the array are sorted by the corresponding | |
1849 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1850 // which point to the underlying blocks of DataLayout structures. | |
1851 // | |
1852 // During interpretation, if profiling in enabled, the interpreter | |
1853 // maintains a method data pointer (mdp), which points at the entry | |
1854 // in the array corresponding to the current bci. In the course of | |
1855 // intepretation, when a bytecode is encountered that has profile data | |
1856 // associated with it, the entry pointed to by mdp is updated, then the | |
1857 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1858 // is NULL to begin with, the interpreter assumes that the current method | |
1859 // is not (yet) being profiled. | |
1860 // | |
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1861 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1862 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1863 // from the base of the data entry array. A "displacement" is the byte offset | |
1864 // in certain ProfileData objects that indicate the amount the mdp must be | |
1865 // adjusted in the event of a change in control flow. | |
1866 // | |
1867 | |
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1868 class MethodData : public Metadata { |
0 | 1869 friend class VMStructs; |
1870 private: | |
1871 friend class ProfileData; | |
1872 | |
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1873 // Back pointer to the Method* |
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1874 Method* _method; |
0 | 1875 |
1876 // Size of this oop in bytes | |
1877 int _size; | |
1878 | |
1879 // Cached hint for bci_to_dp and bci_to_data | |
1880 int _hint_di; | |
1881 | |
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1882 MethodData(methodHandle method, int size, TRAPS); |
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1883 public: |
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1884 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1885 MethodData() {}; // For ciMethodData |
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1886 |
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1887 bool is_methodData() const volatile { return true; } |
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1888 void initialize(); |
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1889 |
0 | 1890 // Whole-method sticky bits and flags |
1891 enum { | |
3345 | 1892 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1893 _trap_hist_mask = max_jubyte, |
1894 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1895 }; // Public flag values | |
1896 private: | |
1897 uint _nof_decompiles; // count of all nmethod removals | |
1898 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1899 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1900 union { | |
1901 intptr_t _align; | |
1902 u1 _array[_trap_hist_limit]; | |
1903 } _trap_hist; | |
1904 | |
1905 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1906 intx _eflags; // flags on escape information | |
1907 intx _arg_local; // bit set of non-escaping arguments | |
1908 intx _arg_stack; // bit set of stack-allocatable arguments | |
1909 intx _arg_returned; // bit set of returned arguments | |
1910 | |
1783 | 1911 int _creation_mileage; // method mileage at MDO creation |
1912 | |
1913 // How many invocations has this MDO seen? | |
1914 // These counters are used to determine the exact age of MDO. | |
1915 // We need those because in tiered a method can be concurrently | |
1916 // executed at different levels. | |
1917 InvocationCounter _invocation_counter; | |
1918 // Same for backedges. | |
1919 InvocationCounter _backedge_counter; | |
2252 | 1920 // Counter values at the time profiling started. |
1921 int _invocation_counter_start; | |
1922 int _backedge_counter_start; | |
1783 | 1923 // Number of loops and blocks is computed when compiling the first |
1924 // time with C1. It is used to determine if method is trivial. | |
1925 short _num_loops; | |
1926 short _num_blocks; | |
1927 // Highest compile level this method has ever seen. | |
1928 u1 _highest_comp_level; | |
1929 // Same for OSR level | |
1930 u1 _highest_osr_comp_level; | |
1931 // Does this method contain anything worth profiling? | |
1932 bool _would_profile; | |
0 | 1933 |
1934 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1935 int _data_size; | |
1936 | |
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1937 // data index for the area dedicated to parameters. -1 if no |
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1938 // parameter profiling. |
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1939 int _parameters_type_data_di; |
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1940 |
0 | 1941 // Beginning of the data entries |
1942 intptr_t _data[1]; | |
1943 | |
1944 // Helper for size computation | |
1945 static int compute_data_size(BytecodeStream* stream); | |
1946 static int bytecode_cell_count(Bytecodes::Code code); | |
1947 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1948 | |
1949 // Helper for initialization | |
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1950 DataLayout* data_layout_at(int data_index) const { |
0 | 1951 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1952 return (DataLayout*) (((address)_data) + data_index); | |
1953 } | |
1954 | |
1955 // Initialize an individual data segment. Returns the size of | |
1956 // the segment in bytes. | |
1957 int initialize_data(BytecodeStream* stream, int data_index); | |
1958 | |
1959 // Helper for data_at | |
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1960 DataLayout* limit_data_position() const { |
0 | 1961 return (DataLayout*)((address)data_base() + _data_size); |
1962 } | |
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1963 bool out_of_bounds(int data_index) const { |
0 | 1964 return data_index >= data_size(); |
1965 } | |
1966 | |
1967 // Give each of the data entries a chance to perform specific | |
1968 // data initialization. | |
1969 void post_initialize(BytecodeStream* stream); | |
1970 | |
1971 // hint accessors | |
1972 int hint_di() const { return _hint_di; } | |
1973 void set_hint_di(int di) { | |
1974 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1975 _hint_di = di; | |
1976 } | |
1977 ProfileData* data_before(int bci) { | |
1978 // avoid SEGV on this edge case | |
1979 if (data_size() == 0) | |
1980 return NULL; | |
1981 int hint = hint_di(); | |
1982 if (data_layout_at(hint)->bci() <= bci) | |
1983 return data_at(hint); | |
1984 return first_data(); | |
1985 } | |
1986 | |
1987 // What is the index of the first data entry? | |
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1988 int first_di() const { return 0; } |
0 | 1989 |
1990 // Find or create an extra ProfileData: | |
1991 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1992 | |
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1993 // return the argument info cell |
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1994 ArgInfoData *arg_info(); |
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1995 |
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1996 enum { |
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1997 no_type_profile = 0, |
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1998 type_profile_jsr292 = 1, |
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1999 type_profile_all = 2 |
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2000 }; |
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2001 |
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2002 static bool profile_jsr292(methodHandle m, int bci); |
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2003 static int profile_arguments_flag(); |
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2004 static bool profile_arguments_jsr292_only(); |
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2005 static bool profile_all_arguments(); |
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2006 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2007 static int profile_return_flag(); |
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2008 static bool profile_all_return(); |
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2009 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2010 static int profile_parameters_flag(); |
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2011 static bool profile_parameters_jsr292_only(); |
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2012 static bool profile_all_parameters(); |
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2013 |
0 | 2014 public: |
2015 static int header_size() { | |
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2016 return sizeof(MethodData)/wordSize; |
0 | 2017 } |
2018 | |
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2019 // Compute the size of a MethodData* before it is created. |
0 | 2020 static int compute_allocation_size_in_bytes(methodHandle method); |
2021 static int compute_allocation_size_in_words(methodHandle method); | |
2022 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
2023 | |
2024 // Determine if a given bytecode can have profile information. | |
2025 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2026 return bytecode_cell_count(code) != no_profile_data; | |
2027 } | |
2028 | |
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2029 // reset into original state |
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2030 void init(); |
0 | 2031 |
2032 // My size | |
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2033 int size_in_bytes() const { return _size; } |
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2034 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2035 #if INCLUDE_SERVICES |
2036 void collect_statistics(KlassSizeStats *sz) const; | |
2037 #endif | |
0 | 2038 |
2039 int creation_mileage() const { return _creation_mileage; } | |
2040 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2041 |
2042 int invocation_count() { | |
2043 if (invocation_counter()->carry()) { | |
2044 return InvocationCounter::count_limit; | |
2045 } | |
2046 return invocation_counter()->count(); | |
2047 } | |
2048 int backedge_count() { | |
2049 if (backedge_counter()->carry()) { | |
2050 return InvocationCounter::count_limit; | |
2051 } | |
2052 return backedge_counter()->count(); | |
2053 } | |
2054 | |
2252 | 2055 int invocation_count_start() { |
2056 if (invocation_counter()->carry()) { | |
2057 return 0; | |
2058 } | |
2059 return _invocation_counter_start; | |
2060 } | |
2061 | |
2062 int backedge_count_start() { | |
2063 if (backedge_counter()->carry()) { | |
2064 return 0; | |
2065 } | |
2066 return _backedge_counter_start; | |
2067 } | |
2068 | |
2069 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2070 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2071 | |
2072 void reset_start_counters() { | |
2073 _invocation_counter_start = invocation_count(); | |
2074 _backedge_counter_start = backedge_count(); | |
2075 } | |
2076 | |
1783 | 2077 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2078 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2079 | |
2080 void set_would_profile(bool p) { _would_profile = p; } | |
2081 bool would_profile() const { return _would_profile; } | |
2082 | |
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2083 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2084 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2085 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2086 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2087 | |
2088 int num_loops() const { return _num_loops; } | |
2089 void set_num_loops(int n) { _num_loops = n; } | |
2090 int num_blocks() const { return _num_blocks; } | |
2091 void set_num_blocks(int n) { _num_blocks = n; } | |
2092 | |
0 | 2093 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2094 static int mileage_of(Method* m); |
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2095 static bool is_empty_data(int size, Bytecodes::Code code); |
0 | 2096 |
2097 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2098 enum EscapeFlag { | |
2099 estimated = 1 << 0, | |
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2100 return_local = 1 << 1, |
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2101 return_allocated = 1 << 2, |
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2102 allocated_escapes = 1 << 3, |
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2103 unknown_modified = 1 << 4 |
0 | 2104 }; |
2105 | |
2106 intx eflags() { return _eflags; } | |
2107 intx arg_local() { return _arg_local; } | |
2108 intx arg_stack() { return _arg_stack; } | |
2109 intx arg_returned() { return _arg_returned; } | |
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2110 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2111 assert(aid != NULL, "arg_info must be not null"); |
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2112 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2113 return aid->arg_modified(a); } |
0 | 2114 |
2115 void set_eflags(intx v) { _eflags = v; } | |
2116 void set_arg_local(intx v) { _arg_local = v; } | |
2117 void set_arg_stack(intx v) { _arg_stack = v; } | |
2118 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2119 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2120 assert(aid != NULL, "arg_info must be not null"); |
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2121 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2122 aid->set_arg_modified(a, v); } |
0 | 2123 |
2124 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2125 | |
2126 // Location and size of data area | |
2127 address data_base() const { | |
2128 return (address) _data; | |
2129 } | |
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2130 int data_size() const { |
0 | 2131 return _data_size; |
2132 } | |
2133 | |
2134 // Accessors | |
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2135 Method* method() const { return _method; } |
0 | 2136 |
2137 // Get the data at an arbitrary (sort of) data index. | |
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2138 ProfileData* data_at(int data_index) const; |
0 | 2139 |
2140 // Walk through the data in order. | |
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2141 ProfileData* first_data() const { return data_at(first_di()); } |
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2142 ProfileData* next_data(ProfileData* current) const; |
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2143 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2144 |
2145 // Convert a dp (data pointer) to a di (data index). | |
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2146 int dp_to_di(address dp) const { |
0 | 2147 return dp - ((address)_data); |
2148 } | |
2149 | |
2150 address di_to_dp(int di) { | |
2151 return (address)data_layout_at(di); | |
2152 } | |
2153 | |
2154 // bci to di/dp conversion. | |
2155 address bci_to_dp(int bci); | |
2156 int bci_to_di(int bci) { | |
2157 return dp_to_di(bci_to_dp(bci)); | |
2158 } | |
2159 | |
2160 // Get the data at an arbitrary bci, or NULL if there is none. | |
2161 ProfileData* bci_to_data(int bci); | |
2162 | |
2163 // Same, but try to create an extra_data record if one is needed: | |
2164 ProfileData* allocate_bci_to_data(int bci) { | |
2165 ProfileData* data = bci_to_data(bci); | |
2166 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
2167 } | |
2168 | |
2169 // Add a handful of extra data records, for trap tracking. | |
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2170 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2171 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2172 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2173 - (address)extra_data_base(); } |
2174 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2175 | |
2176 // Return (uint)-1 for overflow. | |
2177 uint trap_count(int reason) const { | |
2178 assert((uint)reason < _trap_hist_limit, "oob"); | |
2179 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2180 } | |
2181 // For loops: | |
2182 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2183 static uint trap_count_limit() { return _trap_hist_mask; } | |
2184 uint inc_trap_count(int reason) { | |
2185 // Count another trap, anywhere in this method. | |
2186 assert(reason >= 0, "must be single trap"); | |
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2187 assert((uint)reason < _trap_hist_limit, "oob"); |
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2188 uint cnt1 = 1 + _trap_hist._array[reason]; |
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2189 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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2190 _trap_hist._array[reason] = cnt1; |
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2191 return cnt1; |
0 | 2192 } else { |
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2193 return _trap_hist_mask + (++_nof_overflow_traps); |
0 | 2194 } |
2195 } | |
2196 | |
2197 uint overflow_trap_count() const { | |
2198 return _nof_overflow_traps; | |
2199 } | |
2200 uint overflow_recompile_count() const { | |
2201 return _nof_overflow_recompiles; | |
2202 } | |
2203 void inc_overflow_recompile_count() { | |
2204 _nof_overflow_recompiles += 1; | |
2205 } | |
2206 uint decompile_count() const { | |
2207 return _nof_decompiles; | |
2208 } | |
2209 void inc_decompile_count() { | |
2210 _nof_decompiles += 1; | |
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2211 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2212 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2213 } |
0 | 2214 } |
2215 | |
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2216 // Return pointer to area dedicated to parameters in MDO |
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2217 ParametersTypeData* parameters_type_data() const { |
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2218 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2219 } |
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2220 |
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2221 int parameters_type_data_di() const { |
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2222 assert(_parameters_type_data_di != -1, "no args type data"); |
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2223 return _parameters_type_data_di; |
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2224 } |
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2225 |
0 | 2226 // Support for code generation |
2227 static ByteSize data_offset() { | |
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2228 return byte_offset_of(MethodData, _data[0]); |
0 | 2229 } |
2230 | |
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2231 static ByteSize trap_history_offset() { |
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2232 return byte_offset_of(MethodData, _trap_hist._array); |
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2233 } |
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2234 |
1783 | 2235 static ByteSize invocation_counter_offset() { |
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2236 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2237 } |
2238 static ByteSize backedge_counter_offset() { | |
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2239 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2240 } |
2241 | |
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2242 static ByteSize parameters_type_data_di_offset() { |
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2243 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2244 } |
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2245 |
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2246 // Deallocation support - no pointer fields to deallocate |
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2247 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2248 |
0 | 2249 // GC support |
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2250 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2251 |
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2252 // Printing |
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2253 #ifndef PRODUCT |
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2254 void print_on (outputStream* st) const; |
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2255 #endif |
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2256 void print_value_on(outputStream* st) const; |
0 | 2257 |
2258 #ifndef PRODUCT | |
2259 // printing support for method data | |
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2260 void print_data_on(outputStream* st) const; |
0 | 2261 #endif |
2262 | |
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2263 const char* internal_name() const { return "{method data}"; } |
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2264 |
0 | 2265 // verification |
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2266 void verify_on(outputStream* st); |
0 | 2267 void verify_data_on(outputStream* st); |
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2268 |
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2269 static bool profile_parameters_for_method(methodHandle m); |
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2270 static bool profile_arguments(); |
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2271 static bool profile_return(); |
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2272 static bool profile_parameters(); |
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2273 static bool profile_return_jsr292_only(); |
0 | 2274 }; |
1972 | 2275 |
2276 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |