Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/methodData.hpp @ 12875:d13d7aba8c12
8023657: New type profiling points: arguments to call
Summary: x86 interpreter and c1 type profiling for arguments at calls
Reviewed-by: kvn, twisti
author | roland |
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date | Wed, 09 Oct 2013 16:32:21 +0200 |
parents | 190899198332 |
children | ce0cc25bc5e2 |
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 |
0 | 123 }; |
124 | |
125 enum { | |
126 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
127 // The trap state breaks down further as [recompile:1 | reason:3]. | |
128 // This further breakdown is defined in deoptimization.cpp. | |
129 // See Deoptimization::trap_state_reason for an assert that | |
130 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
131 // | |
132 // The trap_state is collected only if ProfileTraps is true. | |
133 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
134 trap_shift = BitsPerByte - trap_bits, | |
135 trap_mask = right_n_bits(trap_bits), | |
136 trap_mask_in_place = (trap_mask << trap_shift), | |
137 flag_limit = trap_shift, | |
138 flag_mask = right_n_bits(flag_limit), | |
139 first_flag = 0 | |
140 }; | |
141 | |
142 // Size computation | |
143 static int header_size_in_bytes() { | |
144 return cell_size; | |
145 } | |
146 static int header_size_in_cells() { | |
147 return 1; | |
148 } | |
149 | |
150 static int compute_size_in_bytes(int cell_count) { | |
151 return header_size_in_bytes() + cell_count * cell_size; | |
152 } | |
153 | |
154 // Initialization | |
155 void initialize(u1 tag, u2 bci, int cell_count); | |
156 | |
157 // Accessors | |
158 u1 tag() { | |
159 return _header._struct._tag; | |
160 } | |
161 | |
162 // Return a few bits of trap state. Range is [0..trap_mask]. | |
163 // The state tells if traps with zero, one, or many reasons have occurred. | |
164 // It also tells whether zero or many recompilations have occurred. | |
165 // The associated trap histogram in the MDO itself tells whether | |
166 // traps are common or not. If a BCI shows that a trap X has | |
167 // occurred, and the MDO shows N occurrences of X, we make the | |
168 // simplifying assumption that all N occurrences can be blamed | |
169 // on that BCI. | |
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170 int trap_state() const { |
0 | 171 return ((_header._struct._flags >> trap_shift) & trap_mask); |
172 } | |
173 | |
174 void set_trap_state(int new_state) { | |
175 assert(ProfileTraps, "used only under +ProfileTraps"); | |
176 uint old_flags = (_header._struct._flags & flag_mask); | |
177 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
178 } | |
179 | |
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180 u1 flags() const { |
0 | 181 return _header._struct._flags; |
182 } | |
183 | |
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184 u2 bci() const { |
0 | 185 return _header._struct._bci; |
186 } | |
187 | |
188 void set_header(intptr_t value) { | |
189 _header._bits = value; | |
190 } | |
191 void release_set_header(intptr_t value) { | |
192 OrderAccess::release_store_ptr(&_header._bits, value); | |
193 } | |
194 intptr_t header() { | |
195 return _header._bits; | |
196 } | |
197 void set_cell_at(int index, intptr_t value) { | |
198 _cells[index] = value; | |
199 } | |
200 void release_set_cell_at(int index, intptr_t value) { | |
201 OrderAccess::release_store_ptr(&_cells[index], value); | |
202 } | |
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203 intptr_t cell_at(int index) const { |
0 | 204 return _cells[index]; |
205 } | |
206 | |
207 void set_flag_at(int flag_number) { | |
208 assert(flag_number < flag_limit, "oob"); | |
209 _header._struct._flags |= (0x1 << flag_number); | |
210 } | |
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211 bool flag_at(int flag_number) const { |
0 | 212 assert(flag_number < flag_limit, "oob"); |
213 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
214 } | |
215 | |
216 // Low-level support for code generation. | |
217 static ByteSize header_offset() { | |
218 return byte_offset_of(DataLayout, _header); | |
219 } | |
220 static ByteSize tag_offset() { | |
221 return byte_offset_of(DataLayout, _header._struct._tag); | |
222 } | |
223 static ByteSize flags_offset() { | |
224 return byte_offset_of(DataLayout, _header._struct._flags); | |
225 } | |
226 static ByteSize bci_offset() { | |
227 return byte_offset_of(DataLayout, _header._struct._bci); | |
228 } | |
229 static ByteSize cell_offset(int index) { | |
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230 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 231 } |
232 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
233 static int flag_number_to_byte_constant(int flag_number) { | |
234 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
235 DataLayout temp; temp.set_header(0); | |
236 temp.set_flag_at(flag_number); | |
237 return temp._header._struct._flags; | |
238 } | |
239 // Return a value which, when or-ed as a word into _header, sets the flag. | |
240 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
241 DataLayout temp; temp.set_header(0); | |
242 temp._header._struct._flags = byte_constant; | |
243 return temp._header._bits; | |
244 } | |
941 | 245 |
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246 ProfileData* data_in(); |
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247 |
941 | 248 // GC support |
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249 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 250 }; |
251 | |
252 | |
253 // ProfileData class hierarchy | |
254 class ProfileData; | |
255 class BitData; | |
256 class CounterData; | |
257 class ReceiverTypeData; | |
258 class VirtualCallData; | |
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259 class VirtualCallTypeData; |
0 | 260 class RetData; |
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261 class CallTypeData; |
0 | 262 class JumpData; |
263 class BranchData; | |
264 class ArrayData; | |
265 class MultiBranchData; | |
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266 class ArgInfoData; |
0 | 267 |
268 // ProfileData | |
269 // | |
270 // A ProfileData object is created to refer to a section of profiling | |
271 // data in a structured way. | |
272 class ProfileData : public ResourceObj { | |
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273 friend class TypeEntries; |
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274 friend class TypeStackSlotEntries; |
0 | 275 private: |
276 #ifndef PRODUCT | |
277 enum { | |
278 tab_width_one = 16, | |
279 tab_width_two = 36 | |
280 }; | |
281 #endif // !PRODUCT | |
282 | |
283 // This is a pointer to a section of profiling data. | |
284 DataLayout* _data; | |
285 | |
286 protected: | |
287 DataLayout* data() { return _data; } | |
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288 const DataLayout* data() const { return _data; } |
0 | 289 |
290 enum { | |
291 cell_size = DataLayout::cell_size | |
292 }; | |
293 | |
294 public: | |
295 // How many cells are in this? | |
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296 virtual int cell_count() const { |
0 | 297 ShouldNotReachHere(); |
298 return -1; | |
299 } | |
300 | |
301 // Return the size of this data. | |
302 int size_in_bytes() { | |
303 return DataLayout::compute_size_in_bytes(cell_count()); | |
304 } | |
305 | |
306 protected: | |
307 // Low-level accessors for underlying data | |
308 void set_intptr_at(int index, intptr_t value) { | |
309 assert(0 <= index && index < cell_count(), "oob"); | |
310 data()->set_cell_at(index, value); | |
311 } | |
312 void release_set_intptr_at(int index, intptr_t value) { | |
313 assert(0 <= index && index < cell_count(), "oob"); | |
314 data()->release_set_cell_at(index, value); | |
315 } | |
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316 intptr_t intptr_at(int index) const { |
0 | 317 assert(0 <= index && index < cell_count(), "oob"); |
318 return data()->cell_at(index); | |
319 } | |
320 void set_uint_at(int index, uint value) { | |
321 set_intptr_at(index, (intptr_t) value); | |
322 } | |
323 void release_set_uint_at(int index, uint value) { | |
324 release_set_intptr_at(index, (intptr_t) value); | |
325 } | |
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326 uint uint_at(int index) const { |
0 | 327 return (uint)intptr_at(index); |
328 } | |
329 void set_int_at(int index, int value) { | |
330 set_intptr_at(index, (intptr_t) value); | |
331 } | |
332 void release_set_int_at(int index, int value) { | |
333 release_set_intptr_at(index, (intptr_t) value); | |
334 } | |
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335 int int_at(int index) const { |
0 | 336 return (int)intptr_at(index); |
337 } | |
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338 int int_at_unchecked(int index) const { |
0 | 339 return (int)data()->cell_at(index); |
340 } | |
341 void set_oop_at(int index, oop value) { | |
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342 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 343 } |
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344 oop oop_at(int index) const { |
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345 return cast_to_oop(intptr_at(index)); |
0 | 346 } |
347 | |
348 void set_flag_at(int flag_number) { | |
349 data()->set_flag_at(flag_number); | |
350 } | |
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351 bool flag_at(int flag_number) const { |
0 | 352 return data()->flag_at(flag_number); |
353 } | |
354 | |
355 // two convenient imports for use by subclasses: | |
356 static ByteSize cell_offset(int index) { | |
357 return DataLayout::cell_offset(index); | |
358 } | |
359 static int flag_number_to_byte_constant(int flag_number) { | |
360 return DataLayout::flag_number_to_byte_constant(flag_number); | |
361 } | |
362 | |
363 ProfileData(DataLayout* data) { | |
364 _data = data; | |
365 } | |
366 | |
367 public: | |
368 // Constructor for invalid ProfileData. | |
369 ProfileData(); | |
370 | |
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371 u2 bci() const { |
0 | 372 return data()->bci(); |
373 } | |
374 | |
375 address dp() { | |
376 return (address)_data; | |
377 } | |
378 | |
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379 int trap_state() const { |
0 | 380 return data()->trap_state(); |
381 } | |
382 void set_trap_state(int new_state) { | |
383 data()->set_trap_state(new_state); | |
384 } | |
385 | |
386 // Type checking | |
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387 virtual bool is_BitData() const { return false; } |
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388 virtual bool is_CounterData() const { return false; } |
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389 virtual bool is_JumpData() const { return false; } |
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390 virtual bool is_ReceiverTypeData()const { return false; } |
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391 virtual bool is_VirtualCallData() const { return false; } |
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392 virtual bool is_RetData() const { return false; } |
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393 virtual bool is_BranchData() const { return false; } |
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394 virtual bool is_ArrayData() const { return false; } |
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395 virtual bool is_MultiBranchData() const { return false; } |
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396 virtual bool is_ArgInfoData() const { return false; } |
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397 virtual bool is_CallTypeData() const { return false; } |
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398 virtual bool is_VirtualCallTypeData()const { return false; } |
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399 |
0 | 400 |
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401 BitData* as_BitData() const { |
0 | 402 assert(is_BitData(), "wrong type"); |
403 return is_BitData() ? (BitData*) this : NULL; | |
404 } | |
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405 CounterData* as_CounterData() const { |
0 | 406 assert(is_CounterData(), "wrong type"); |
407 return is_CounterData() ? (CounterData*) this : NULL; | |
408 } | |
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409 JumpData* as_JumpData() const { |
0 | 410 assert(is_JumpData(), "wrong type"); |
411 return is_JumpData() ? (JumpData*) this : NULL; | |
412 } | |
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413 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 414 assert(is_ReceiverTypeData(), "wrong type"); |
415 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
416 } | |
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417 VirtualCallData* as_VirtualCallData() const { |
0 | 418 assert(is_VirtualCallData(), "wrong type"); |
419 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
420 } | |
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421 RetData* as_RetData() const { |
0 | 422 assert(is_RetData(), "wrong type"); |
423 return is_RetData() ? (RetData*) this : NULL; | |
424 } | |
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425 BranchData* as_BranchData() const { |
0 | 426 assert(is_BranchData(), "wrong type"); |
427 return is_BranchData() ? (BranchData*) this : NULL; | |
428 } | |
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429 ArrayData* as_ArrayData() const { |
0 | 430 assert(is_ArrayData(), "wrong type"); |
431 return is_ArrayData() ? (ArrayData*) this : NULL; | |
432 } | |
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433 MultiBranchData* as_MultiBranchData() const { |
0 | 434 assert(is_MultiBranchData(), "wrong type"); |
435 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
436 } | |
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437 ArgInfoData* as_ArgInfoData() const { |
45
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438 assert(is_ArgInfoData(), "wrong type"); |
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439 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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440 } |
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441 CallTypeData* as_CallTypeData() const { |
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442 assert(is_CallTypeData(), "wrong type"); |
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443 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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444 } |
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445 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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446 assert(is_VirtualCallTypeData(), "wrong type"); |
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447 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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448 } |
0 | 449 |
450 | |
451 // Subclass specific initialization | |
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452 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 453 |
454 // GC support | |
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455 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 456 |
457 // CI translation: ProfileData can represent both MethodDataOop data | |
458 // as well as CIMethodData data. This function is provided for translating | |
459 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
460 // most ProfileData don't require any translation, so we provide the null | |
461 // translation here, and the required translators are in the ci subclasses. | |
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462 virtual void translate_from(const ProfileData* data) {} |
0 | 463 |
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464 virtual void print_data_on(outputStream* st) const { |
0 | 465 ShouldNotReachHere(); |
466 } | |
467 | |
468 #ifndef PRODUCT | |
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469 void print_shared(outputStream* st, const char* name) const; |
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470 void tab(outputStream* st, bool first = false) const; |
0 | 471 #endif |
472 }; | |
473 | |
474 // BitData | |
475 // | |
476 // A BitData holds a flag or two in its header. | |
477 class BitData : public ProfileData { | |
478 protected: | |
479 enum { | |
480 // null_seen: | |
481 // saw a null operand (cast/aastore/instanceof) | |
482 null_seen_flag = DataLayout::first_flag + 0 | |
483 }; | |
484 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
485 public: | |
486 BitData(DataLayout* layout) : ProfileData(layout) { | |
487 } | |
488 | |
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489 virtual bool is_BitData() const { return true; } |
0 | 490 |
491 static int static_cell_count() { | |
492 return bit_cell_count; | |
493 } | |
494 | |
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495 virtual int cell_count() const { |
0 | 496 return static_cell_count(); |
497 } | |
498 | |
499 // Accessor | |
500 | |
501 // The null_seen flag bit is specially known to the interpreter. | |
502 // Consulting it allows the compiler to avoid setting up null_check traps. | |
503 bool null_seen() { return flag_at(null_seen_flag); } | |
504 void set_null_seen() { set_flag_at(null_seen_flag); } | |
505 | |
506 | |
507 // Code generation support | |
508 static int null_seen_byte_constant() { | |
509 return flag_number_to_byte_constant(null_seen_flag); | |
510 } | |
511 | |
512 static ByteSize bit_data_size() { | |
513 return cell_offset(bit_cell_count); | |
514 } | |
515 | |
516 #ifndef PRODUCT | |
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517 void print_data_on(outputStream* st) const; |
0 | 518 #endif |
519 }; | |
520 | |
521 // CounterData | |
522 // | |
523 // A CounterData corresponds to a simple counter. | |
524 class CounterData : public BitData { | |
525 protected: | |
526 enum { | |
527 count_off, | |
528 counter_cell_count | |
529 }; | |
530 public: | |
531 CounterData(DataLayout* layout) : BitData(layout) {} | |
532 | |
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533 virtual bool is_CounterData() const { return true; } |
0 | 534 |
535 static int static_cell_count() { | |
536 return counter_cell_count; | |
537 } | |
538 | |
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539 virtual int cell_count() const { |
0 | 540 return static_cell_count(); |
541 } | |
542 | |
543 // Direct accessor | |
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544 uint count() const { |
0 | 545 return uint_at(count_off); |
546 } | |
547 | |
548 // Code generation support | |
549 static ByteSize count_offset() { | |
550 return cell_offset(count_off); | |
551 } | |
552 static ByteSize counter_data_size() { | |
553 return cell_offset(counter_cell_count); | |
554 } | |
555 | |
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556 void set_count(uint count) { |
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557 set_uint_at(count_off, count); |
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558 } |
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559 |
0 | 560 #ifndef PRODUCT |
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561 void print_data_on(outputStream* st) const; |
0 | 562 #endif |
563 }; | |
564 | |
565 // JumpData | |
566 // | |
567 // A JumpData is used to access profiling information for a direct | |
568 // branch. It is a counter, used for counting the number of branches, | |
569 // plus a data displacement, used for realigning the data pointer to | |
570 // the corresponding target bci. | |
571 class JumpData : public ProfileData { | |
572 protected: | |
573 enum { | |
574 taken_off_set, | |
575 displacement_off_set, | |
576 jump_cell_count | |
577 }; | |
578 | |
579 void set_displacement(int displacement) { | |
580 set_int_at(displacement_off_set, displacement); | |
581 } | |
582 | |
583 public: | |
584 JumpData(DataLayout* layout) : ProfileData(layout) { | |
585 assert(layout->tag() == DataLayout::jump_data_tag || | |
586 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
587 } | |
588 | |
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589 virtual bool is_JumpData() const { return true; } |
0 | 590 |
591 static int static_cell_count() { | |
592 return jump_cell_count; | |
593 } | |
594 | |
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595 virtual int cell_count() const { |
0 | 596 return static_cell_count(); |
597 } | |
598 | |
599 // Direct accessor | |
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600 uint taken() const { |
0 | 601 return uint_at(taken_off_set); |
602 } | |
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603 |
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604 void set_taken(uint cnt) { |
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605 set_uint_at(taken_off_set, cnt); |
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606 } |
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607 |
0 | 608 // Saturating counter |
609 uint inc_taken() { | |
610 uint cnt = taken() + 1; | |
611 // Did we wrap? Will compiler screw us?? | |
612 if (cnt == 0) cnt--; | |
613 set_uint_at(taken_off_set, cnt); | |
614 return cnt; | |
615 } | |
616 | |
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617 int displacement() const { |
0 | 618 return int_at(displacement_off_set); |
619 } | |
620 | |
621 // Code generation support | |
622 static ByteSize taken_offset() { | |
623 return cell_offset(taken_off_set); | |
624 } | |
625 | |
626 static ByteSize displacement_offset() { | |
627 return cell_offset(displacement_off_set); | |
628 } | |
629 | |
630 // Specific initialization. | |
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631 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 632 |
633 #ifndef PRODUCT | |
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634 void print_data_on(outputStream* st) const; |
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635 #endif |
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636 }; |
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637 |
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638 // Entries in a ProfileData object to record types: it can either be |
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639 // none (no profile), unknown (conflicting profile data) or a klass if |
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640 // a single one is seen. Whether a null reference was seen is also |
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641 // recorded. No counter is associated with the type and a single type |
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642 // is tracked (unlike VirtualCallData). |
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643 class TypeEntries { |
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644 |
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645 public: |
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646 |
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647 // A single cell is used to record information for a type: |
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648 // - the cell is initialized to 0 |
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649 // - when a type is discovered it is stored in the cell |
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650 // - bit zero of the cell is used to record whether a null reference |
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651 // was encountered or not |
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652 // - bit 1 is set to record a conflict in the type information |
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653 |
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654 enum { |
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655 null_seen = 1, |
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656 type_mask = ~null_seen, |
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657 type_unknown = 2, |
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658 status_bits = null_seen | type_unknown, |
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659 type_klass_mask = ~status_bits |
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660 }; |
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661 |
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662 // what to initialize a cell to |
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663 static intptr_t type_none() { |
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664 return 0; |
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665 } |
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666 |
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667 // null seen = bit 0 set? |
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668 static bool was_null_seen(intptr_t v) { |
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669 return (v & null_seen) != 0; |
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670 } |
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671 |
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672 // conflicting type information = bit 1 set? |
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673 static bool is_type_unknown(intptr_t v) { |
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674 return (v & type_unknown) != 0; |
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675 } |
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676 |
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677 // not type information yet = all bits cleared, ignoring bit 0? |
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678 static bool is_type_none(intptr_t v) { |
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679 return (v & type_mask) == 0; |
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680 } |
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681 |
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682 // recorded type: cell without bit 0 and 1 |
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683 static intptr_t klass_part(intptr_t v) { |
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684 intptr_t r = v & type_klass_mask; |
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685 assert (r != 0, "invalid"); |
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686 return r; |
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687 } |
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688 |
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689 // type recorded |
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690 static Klass* valid_klass(intptr_t k) { |
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691 if (!is_type_none(k) && |
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692 !is_type_unknown(k)) { |
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693 return (Klass*)klass_part(k); |
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694 } else { |
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|
695 return NULL; |
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|
696 } |
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|
697 } |
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|
698 |
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699 static intptr_t with_status(intptr_t k, intptr_t in) { |
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700 return k | (in & status_bits); |
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|
701 } |
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|
702 |
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703 static intptr_t with_status(Klass* k, intptr_t in) { |
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704 return with_status((intptr_t)k, in); |
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|
705 } |
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|
706 |
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|
707 #ifndef PRODUCT |
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708 static void print_klass(outputStream* st, intptr_t k); |
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709 #endif |
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710 |
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711 // GC support |
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712 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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|
713 |
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|
714 protected: |
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715 // ProfileData object these entries are part of |
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716 ProfileData* _pd; |
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717 // offset within the ProfileData object where the entries start |
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718 const int _base_off; |
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|
719 |
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720 TypeEntries(int base_off) |
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721 : _base_off(base_off), _pd(NULL) {} |
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|
722 |
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723 void set_intptr_at(int index, intptr_t value) { |
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724 _pd->set_intptr_at(index, value); |
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|
725 } |
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|
726 |
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727 intptr_t intptr_at(int index) const { |
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728 return _pd->intptr_at(index); |
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|
729 } |
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diff
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|
730 |
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|
731 public: |
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|
732 void set_profile_data(ProfileData* pd) { |
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733 _pd = pd; |
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|
734 } |
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|
735 }; |
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|
736 |
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|
737 // Type entries used for arguments passed at a call and parameters on |
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|
738 // method entry. 2 cells per entry: one for the type encoded as in |
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|
739 // TypeEntries and one initialized with the stack slot where the |
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|
740 // profiled object is to be found so that the interpreter can locate |
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|
741 // it quickly. |
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|
742 class TypeStackSlotEntries : public TypeEntries { |
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|
743 |
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|
744 private: |
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|
745 enum { |
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|
746 stack_slot_entry, |
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|
747 type_entry, |
d13d7aba8c12
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parents:
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diff
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|
748 per_arg_cell_count |
d13d7aba8c12
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|
749 }; |
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|
750 |
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|
751 // Start with a header if needed. It stores the number of cells used |
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|
752 // for this call type information. Unless we collect only profiling |
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|
753 // for a single argument the number of cells is unknown statically. |
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|
754 static int header_cell_count() { |
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|
755 return (TypeProfileArgsLimit > 1) ? 1 : 0; |
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parents:
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|
756 } |
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|
757 |
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|
758 static int cell_count_local_offset() { |
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|
759 assert(arguments_profiling_enabled() && TypeProfileArgsLimit > 1, "no cell count"); |
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|
760 return 0; |
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parents:
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diff
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|
761 } |
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diff
changeset
|
762 |
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diff
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|
763 int cell_count_global_offset() const { |
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|
764 return _base_off + cell_count_local_offset(); |
d13d7aba8c12
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|
765 } |
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parents:
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diff
changeset
|
766 |
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parents:
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diff
changeset
|
767 // offset of cell for stack slot for entry i within ProfileData object |
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parents:
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|
768 int stack_slot_global_offset(int i) const { |
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|
769 return _base_off + stack_slot_local_offset(i); |
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diff
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|
770 } |
d13d7aba8c12
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parents:
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diff
changeset
|
771 |
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parents:
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diff
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|
772 void check_number_of_arguments(int total) { |
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|
773 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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diff
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|
774 } |
d13d7aba8c12
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parents:
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diff
changeset
|
775 |
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parents:
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diff
changeset
|
776 // number of cells not counting the header |
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diff
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|
777 int cell_count_no_header() const { |
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|
778 return _pd->uint_at(cell_count_global_offset()); |
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parents:
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diff
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|
779 } |
d13d7aba8c12
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parents:
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diff
changeset
|
780 |
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parents:
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diff
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|
781 static bool arguments_profiling_enabled(); |
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parents:
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diff
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|
782 static void assert_arguments_profiling_enabled() { |
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|
783 assert(arguments_profiling_enabled(), "args profiling should be on"); |
d13d7aba8c12
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parents:
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diff
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|
784 } |
d13d7aba8c12
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parents:
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diff
changeset
|
785 |
d13d7aba8c12
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parents:
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diff
changeset
|
786 protected: |
d13d7aba8c12
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parents:
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diff
changeset
|
787 |
d13d7aba8c12
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parents:
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diff
changeset
|
788 // offset of cell for type for entry i within ProfileData object |
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parents:
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diff
changeset
|
789 int type_global_offset(int i) const { |
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parents:
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diff
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|
790 return _base_off + type_local_offset(i); |
d13d7aba8c12
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parents:
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diff
changeset
|
791 } |
d13d7aba8c12
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parents:
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diff
changeset
|
792 |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
793 public: |
d13d7aba8c12
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parents:
12316
diff
changeset
|
794 |
d13d7aba8c12
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parents:
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diff
changeset
|
795 TypeStackSlotEntries(int base_off) |
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parents:
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|
796 : TypeEntries(base_off) {} |
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diff
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|
797 |
d13d7aba8c12
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parents:
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|
798 static int compute_cell_count(BytecodeStream* stream); |
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|
799 |
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|
800 static void initialize(DataLayout* dl, int base, int cell_count) { |
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|
801 if (TypeProfileArgsLimit > 1) { |
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parents:
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diff
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|
802 int off = base + cell_count_local_offset(); |
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|
803 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
d13d7aba8c12
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diff
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|
804 } |
d13d7aba8c12
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parents:
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diff
changeset
|
805 } |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
806 |
d13d7aba8c12
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parents:
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diff
changeset
|
807 void post_initialize(BytecodeStream* stream); |
d13d7aba8c12
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parents:
12316
diff
changeset
|
808 |
d13d7aba8c12
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parents:
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diff
changeset
|
809 int number_of_arguments() const { |
d13d7aba8c12
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parents:
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diff
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|
810 assert_arguments_profiling_enabled(); |
d13d7aba8c12
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parents:
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diff
changeset
|
811 if (TypeProfileArgsLimit > 1) { |
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parents:
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|
812 int cell_count = cell_count_no_header(); |
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|
813 int nb = cell_count / TypeStackSlotEntries::per_arg_count(); |
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|
814 assert(nb > 0 && nb <= TypeProfileArgsLimit , "only when we profile args"); |
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parents:
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|
815 return nb; |
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parents:
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diff
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|
816 } else { |
d13d7aba8c12
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|
817 assert(TypeProfileArgsLimit == 1, "at least one arg"); |
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parents:
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|
818 return 1; |
d13d7aba8c12
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parents:
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diff
changeset
|
819 } |
d13d7aba8c12
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parents:
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diff
changeset
|
820 } |
d13d7aba8c12
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parents:
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diff
changeset
|
821 |
d13d7aba8c12
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parents:
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diff
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|
822 int cell_count() const { |
d13d7aba8c12
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parents:
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diff
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|
823 assert_arguments_profiling_enabled(); |
d13d7aba8c12
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parents:
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diff
changeset
|
824 if (TypeProfileArgsLimit > 1) { |
d13d7aba8c12
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|
825 return _base_off + header_cell_count() + _pd->int_at_unchecked(cell_count_global_offset()); |
d13d7aba8c12
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parents:
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diff
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|
826 } else { |
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parents:
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|
827 return _base_off + TypeStackSlotEntries::per_arg_count(); |
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parents:
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diff
changeset
|
828 } |
d13d7aba8c12
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parents:
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diff
changeset
|
829 } |
d13d7aba8c12
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roland
parents:
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diff
changeset
|
830 |
d13d7aba8c12
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parents:
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diff
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|
831 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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parents:
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diff
changeset
|
832 static int stack_slot_local_offset(int i) { |
d13d7aba8c12
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parents:
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diff
changeset
|
833 assert_arguments_profiling_enabled(); |
d13d7aba8c12
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parents:
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diff
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834 return header_cell_count() + i * per_arg_cell_count + stack_slot_entry; |
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835 } |
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836 |
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837 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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838 static int type_local_offset(int i) { |
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839 return header_cell_count() + i * per_arg_cell_count + type_entry; |
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840 } |
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841 |
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842 // stack slot for entry i |
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843 uint stack_slot(int i) const { |
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844 assert(i >= 0 && i < number_of_arguments(), "oob"); |
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845 return _pd->uint_at(stack_slot_global_offset(i)); |
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846 } |
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847 |
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848 // set stack slot for entry i |
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849 void set_stack_slot(int i, uint num) { |
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850 assert(i >= 0 && i < number_of_arguments(), "oob"); |
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851 _pd->set_uint_at(stack_slot_global_offset(i), num); |
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852 } |
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853 |
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854 // type for entry i |
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855 intptr_t type(int i) const { |
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856 assert(i >= 0 && i < number_of_arguments(), "oob"); |
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857 return _pd->intptr_at(type_global_offset(i)); |
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858 } |
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859 |
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860 // set type for entry i |
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861 void set_type(int i, intptr_t k) { |
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862 assert(i >= 0 && i < number_of_arguments(), "oob"); |
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863 _pd->set_intptr_at(type_global_offset(i), k); |
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864 } |
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865 |
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866 static ByteSize per_arg_size() { |
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867 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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868 } |
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869 |
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870 static int per_arg_count() { |
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871 return per_arg_cell_count ; |
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872 } |
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873 |
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874 // Code generation support |
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875 static ByteSize cell_count_offset() { |
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876 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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877 } |
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878 |
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879 static ByteSize args_data_offset() { |
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880 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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881 } |
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882 |
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883 static ByteSize stack_slot_offset(int i) { |
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884 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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885 } |
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886 |
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887 static ByteSize type_offset(int i) { |
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888 return in_ByteSize(type_local_offset(i) * DataLayout::cell_size); |
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889 } |
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890 |
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891 // GC support |
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892 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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893 |
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894 #ifndef PRODUCT |
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895 void print_data_on(outputStream* st) const; |
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896 #endif |
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897 }; |
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898 |
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899 // CallTypeData |
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900 // |
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901 // A CallTypeData is used to access profiling information about a non |
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902 // virtual call for which we collect type information about arguments. |
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903 class CallTypeData : public CounterData { |
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904 private: |
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905 TypeStackSlotEntries _args; |
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906 |
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907 public: |
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908 CallTypeData(DataLayout* layout) : |
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909 CounterData(layout), _args(CounterData::static_cell_count()) { |
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910 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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911 // Some compilers (VC++) don't want this passed in member initialization list |
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912 _args.set_profile_data(this); |
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913 } |
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914 |
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915 const TypeStackSlotEntries* args() const { return &_args; } |
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916 |
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917 virtual bool is_CallTypeData() const { return true; } |
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918 |
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919 static int static_cell_count() { |
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920 return -1; |
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921 } |
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922 |
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923 static int compute_cell_count(BytecodeStream* stream) { |
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924 return CounterData::static_cell_count() + TypeStackSlotEntries::compute_cell_count(stream); |
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925 } |
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926 |
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927 static void initialize(DataLayout* dl, int cell_count) { |
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928 TypeStackSlotEntries::initialize(dl, CounterData::static_cell_count(), cell_count); |
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929 } |
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930 |
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931 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) { |
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932 _args.post_initialize(stream); |
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933 } |
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934 |
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935 virtual int cell_count() const { |
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936 return _args.cell_count(); |
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937 } |
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938 |
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939 uint number_of_arguments() const { |
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940 return args()->number_of_arguments(); |
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941 } |
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942 |
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943 void set_argument_type(int i, Klass* k) { |
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944 intptr_t current = _args.type(i); |
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945 _args.set_type(i, TypeEntries::with_status(k, current)); |
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946 } |
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947 |
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948 // Code generation support |
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949 static ByteSize args_data_offset() { |
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950 return cell_offset(CounterData::static_cell_count()) + TypeStackSlotEntries::args_data_offset(); |
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951 } |
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952 |
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953 // GC support |
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954 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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955 _args.clean_weak_klass_links(is_alive_closure); |
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956 } |
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957 |
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958 #ifndef PRODUCT |
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959 virtual void print_data_on(outputStream* st) const; |
0 | 960 #endif |
961 }; | |
962 | |
963 // ReceiverTypeData | |
964 // | |
965 // A ReceiverTypeData is used to access profiling information about a | |
966 // dynamic type check. It consists of a counter which counts the total times | |
6725
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967 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 968 // which are used to store a type profile for the receiver of the check. |
969 class ReceiverTypeData : public CounterData { | |
970 protected: | |
971 enum { | |
972 receiver0_offset = counter_cell_count, | |
973 count0_offset, | |
974 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
975 }; | |
976 | |
977 public: | |
978 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
979 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
12875
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980 layout->tag() == DataLayout::virtual_call_data_tag || |
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981 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 982 } |
983 | |
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984 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 985 |
986 static int static_cell_count() { | |
987 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
988 } | |
989 | |
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990 virtual int cell_count() const { |
0 | 991 return static_cell_count(); |
992 } | |
993 | |
994 // Direct accessors | |
995 static uint row_limit() { | |
996 return TypeProfileWidth; | |
997 } | |
998 static int receiver_cell_index(uint row) { | |
999 return receiver0_offset + row * receiver_type_row_cell_count; | |
1000 } | |
1001 static int receiver_count_cell_index(uint row) { | |
1002 return count0_offset + row * receiver_type_row_cell_count; | |
1003 } | |
1004 | |
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1005 Klass* receiver(uint row) const { |
0 | 1006 assert(row < row_limit(), "oob"); |
1007 | |
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1008 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1009 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1010 return recv; |
1011 } | |
1012 | |
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1013 void set_receiver(uint row, Klass* k) { |
941 | 1014 assert((uint)row < row_limit(), "oob"); |
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1015 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1016 } |
1017 | |
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1018 uint receiver_count(uint row) const { |
0 | 1019 assert(row < row_limit(), "oob"); |
1020 return uint_at(receiver_count_cell_index(row)); | |
1021 } | |
1022 | |
941 | 1023 void set_receiver_count(uint row, uint count) { |
1024 assert(row < row_limit(), "oob"); | |
1025 set_uint_at(receiver_count_cell_index(row), count); | |
1026 } | |
1027 | |
1028 void clear_row(uint row) { | |
1029 assert(row < row_limit(), "oob"); | |
1251
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1030 // Clear total count - indicator of polymorphic call site. |
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1031 // The site may look like as monomorphic after that but |
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1032 // it allow to have more accurate profiling information because |
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1033 // there was execution phase change since klasses were unloaded. |
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1034 // If the site is still polymorphic then MDO will be updated |
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1035 // to reflect it. But it could be the case that the site becomes |
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1036 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1037 // Even if we use monomorphic (when it is not) for compilation |
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1038 // we will only have trap, deoptimization and recompile again |
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1039 // with updated MDO after executing method in Interpreter. |
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1040 // An additional receiver will be recorded in the cleaned row |
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1041 // during next call execution. |
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1042 // |
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1043 // Note: our profiling logic works with empty rows in any slot. |
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1044 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1045 // |
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1046 set_count(0); |
941 | 1047 set_receiver(row, NULL); |
1048 set_receiver_count(row, 0); | |
1049 } | |
1050 | |
0 | 1051 // Code generation support |
1052 static ByteSize receiver_offset(uint row) { | |
1053 return cell_offset(receiver_cell_index(row)); | |
1054 } | |
1055 static ByteSize receiver_count_offset(uint row) { | |
1056 return cell_offset(receiver_count_cell_index(row)); | |
1057 } | |
1058 static ByteSize receiver_type_data_size() { | |
1059 return cell_offset(static_cell_count()); | |
1060 } | |
1061 | |
1062 // GC support | |
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1063 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1064 |
1065 #ifndef PRODUCT | |
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1066 void print_receiver_data_on(outputStream* st) const; |
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1067 void print_data_on(outputStream* st) const; |
0 | 1068 #endif |
1069 }; | |
1070 | |
1071 // VirtualCallData | |
1072 // | |
1073 // A VirtualCallData is used to access profiling information about a | |
1074 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1075 class VirtualCallData : public ReceiverTypeData { | |
1076 public: | |
1077 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1078 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1079 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1080 } |
1081 | |
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1082 virtual bool is_VirtualCallData() const { return true; } |
0 | 1083 |
1084 static int static_cell_count() { | |
1085 // At this point we could add more profile state, e.g., for arguments. | |
1086 // But for now it's the same size as the base record type. | |
1087 return ReceiverTypeData::static_cell_count(); | |
1088 } | |
1089 | |
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1090 virtual int cell_count() const { |
0 | 1091 return static_cell_count(); |
1092 } | |
1093 | |
1094 // Direct accessors | |
1095 static ByteSize virtual_call_data_size() { | |
1096 return cell_offset(static_cell_count()); | |
1097 } | |
1098 | |
1099 #ifndef PRODUCT | |
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1100 void print_data_on(outputStream* st) const; |
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1101 #endif |
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1102 }; |
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1103 |
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1104 // VirtualCallTypeData |
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1105 // |
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1106 // A VirtualCallTypeData is used to access profiling information about |
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1107 // a virtual call for which we collect type information about |
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1108 // arguments. |
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1109 class VirtualCallTypeData : public VirtualCallData { |
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1110 private: |
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1111 TypeStackSlotEntries _args; |
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1112 |
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1113 public: |
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1114 VirtualCallTypeData(DataLayout* layout) : |
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1115 VirtualCallData(layout), _args(VirtualCallData::static_cell_count()) { |
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1116 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1117 // Some compilers (VC++) don't want this passed in member initialization list |
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1118 _args.set_profile_data(this); |
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1119 } |
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1120 |
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1121 const TypeStackSlotEntries* args() const { return &_args; } |
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1122 |
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1123 virtual bool is_VirtualCallTypeData() const { return true; } |
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1124 |
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1125 static int static_cell_count() { |
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1126 return -1; |
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1127 } |
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1128 |
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1129 static int compute_cell_count(BytecodeStream* stream) { |
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1130 return VirtualCallData::static_cell_count() + TypeStackSlotEntries::compute_cell_count(stream); |
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1131 } |
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1132 |
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1133 static void initialize(DataLayout* dl, int cell_count) { |
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1134 TypeStackSlotEntries::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1135 } |
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1136 |
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1137 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) { |
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1138 _args.post_initialize(stream); |
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1139 } |
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1140 |
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1141 virtual int cell_count() const { |
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1142 return _args.cell_count(); |
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1143 } |
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1144 |
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1145 uint number_of_arguments() const { |
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1146 return args()->number_of_arguments(); |
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1147 } |
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1148 |
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1149 void set_argument_type(int i, Klass* k) { |
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1150 intptr_t current = _args.type(i); |
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1151 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1152 } |
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1153 |
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1154 // Code generation support |
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1155 static ByteSize args_data_offset() { |
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1156 return cell_offset(VirtualCallData::static_cell_count()) + TypeStackSlotEntries::args_data_offset(); |
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1157 } |
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1158 |
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1159 // GC support |
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1160 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1161 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1162 _args.clean_weak_klass_links(is_alive_closure); |
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1163 } |
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1164 |
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1165 #ifndef PRODUCT |
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1166 virtual void print_data_on(outputStream* st) const; |
0 | 1167 #endif |
1168 }; | |
1169 | |
1170 // RetData | |
1171 // | |
1172 // A RetData is used to access profiling information for a ret bytecode. | |
1173 // It is composed of a count of the number of times that the ret has | |
1174 // been executed, followed by a series of triples of the form | |
1175 // (bci, count, di) which count the number of times that some bci was the | |
1176 // target of the ret and cache a corresponding data displacement. | |
1177 class RetData : public CounterData { | |
1178 protected: | |
1179 enum { | |
1180 bci0_offset = counter_cell_count, | |
1181 count0_offset, | |
1182 displacement0_offset, | |
1183 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1184 }; | |
1185 | |
1186 void set_bci(uint row, int bci) { | |
1187 assert((uint)row < row_limit(), "oob"); | |
1188 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1189 } | |
1190 void release_set_bci(uint row, int bci) { | |
1191 assert((uint)row < row_limit(), "oob"); | |
1192 // 'release' when setting the bci acts as a valid flag for other | |
1193 // threads wrt bci_count and bci_displacement. | |
1194 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1195 } | |
1196 void set_bci_count(uint row, uint count) { | |
1197 assert((uint)row < row_limit(), "oob"); | |
1198 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1199 } | |
1200 void set_bci_displacement(uint row, int disp) { | |
1201 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1202 } | |
1203 | |
1204 public: | |
1205 RetData(DataLayout* layout) : CounterData(layout) { | |
1206 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1207 } | |
1208 | |
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1209 virtual bool is_RetData() const { return true; } |
0 | 1210 |
1211 enum { | |
1212 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1213 }; | |
1214 | |
1215 static int static_cell_count() { | |
1216 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1217 } | |
1218 | |
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1219 virtual int cell_count() const { |
0 | 1220 return static_cell_count(); |
1221 } | |
1222 | |
1223 static uint row_limit() { | |
1224 return BciProfileWidth; | |
1225 } | |
1226 static int bci_cell_index(uint row) { | |
1227 return bci0_offset + row * ret_row_cell_count; | |
1228 } | |
1229 static int bci_count_cell_index(uint row) { | |
1230 return count0_offset + row * ret_row_cell_count; | |
1231 } | |
1232 static int bci_displacement_cell_index(uint row) { | |
1233 return displacement0_offset + row * ret_row_cell_count; | |
1234 } | |
1235 | |
1236 // Direct accessors | |
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1237 int bci(uint row) const { |
0 | 1238 return int_at(bci_cell_index(row)); |
1239 } | |
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1240 uint bci_count(uint row) const { |
0 | 1241 return uint_at(bci_count_cell_index(row)); |
1242 } | |
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1243 int bci_displacement(uint row) const { |
0 | 1244 return int_at(bci_displacement_cell_index(row)); |
1245 } | |
1246 | |
1247 // Interpreter Runtime support | |
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1248 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1249 |
1250 // Code generation support | |
1251 static ByteSize bci_offset(uint row) { | |
1252 return cell_offset(bci_cell_index(row)); | |
1253 } | |
1254 static ByteSize bci_count_offset(uint row) { | |
1255 return cell_offset(bci_count_cell_index(row)); | |
1256 } | |
1257 static ByteSize bci_displacement_offset(uint row) { | |
1258 return cell_offset(bci_displacement_cell_index(row)); | |
1259 } | |
1260 | |
1261 // Specific initialization. | |
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1262 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1263 |
1264 #ifndef PRODUCT | |
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1265 void print_data_on(outputStream* st) const; |
0 | 1266 #endif |
1267 }; | |
1268 | |
1269 // BranchData | |
1270 // | |
1271 // A BranchData is used to access profiling data for a two-way branch. | |
1272 // It consists of taken and not_taken counts as well as a data displacement | |
1273 // for the taken case. | |
1274 class BranchData : public JumpData { | |
1275 protected: | |
1276 enum { | |
1277 not_taken_off_set = jump_cell_count, | |
1278 branch_cell_count | |
1279 }; | |
1280 | |
1281 void set_displacement(int displacement) { | |
1282 set_int_at(displacement_off_set, displacement); | |
1283 } | |
1284 | |
1285 public: | |
1286 BranchData(DataLayout* layout) : JumpData(layout) { | |
1287 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1288 } | |
1289 | |
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1290 virtual bool is_BranchData() const { return true; } |
0 | 1291 |
1292 static int static_cell_count() { | |
1293 return branch_cell_count; | |
1294 } | |
1295 | |
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1296 virtual int cell_count() const { |
0 | 1297 return static_cell_count(); |
1298 } | |
1299 | |
1300 // Direct accessor | |
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1301 uint not_taken() const { |
0 | 1302 return uint_at(not_taken_off_set); |
1303 } | |
1304 | |
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1305 void set_not_taken(uint cnt) { |
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1306 set_uint_at(not_taken_off_set, cnt); |
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1307 } |
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1308 |
0 | 1309 uint inc_not_taken() { |
1310 uint cnt = not_taken() + 1; | |
1311 // Did we wrap? Will compiler screw us?? | |
1312 if (cnt == 0) cnt--; | |
1313 set_uint_at(not_taken_off_set, cnt); | |
1314 return cnt; | |
1315 } | |
1316 | |
1317 // Code generation support | |
1318 static ByteSize not_taken_offset() { | |
1319 return cell_offset(not_taken_off_set); | |
1320 } | |
1321 static ByteSize branch_data_size() { | |
1322 return cell_offset(branch_cell_count); | |
1323 } | |
1324 | |
1325 // Specific initialization. | |
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1326 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1327 |
1328 #ifndef PRODUCT | |
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1329 void print_data_on(outputStream* st) const; |
0 | 1330 #endif |
1331 }; | |
1332 | |
1333 // ArrayData | |
1334 // | |
1335 // A ArrayData is a base class for accessing profiling data which does | |
1336 // not have a statically known size. It consists of an array length | |
1337 // and an array start. | |
1338 class ArrayData : public ProfileData { | |
1339 protected: | |
1340 friend class DataLayout; | |
1341 | |
1342 enum { | |
1343 array_len_off_set, | |
1344 array_start_off_set | |
1345 }; | |
1346 | |
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1347 uint array_uint_at(int index) const { |
0 | 1348 int aindex = index + array_start_off_set; |
1349 return uint_at(aindex); | |
1350 } | |
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1351 int array_int_at(int index) const { |
0 | 1352 int aindex = index + array_start_off_set; |
1353 return int_at(aindex); | |
1354 } | |
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1355 oop array_oop_at(int index) const { |
0 | 1356 int aindex = index + array_start_off_set; |
1357 return oop_at(aindex); | |
1358 } | |
1359 void array_set_int_at(int index, int value) { | |
1360 int aindex = index + array_start_off_set; | |
1361 set_int_at(aindex, value); | |
1362 } | |
1363 | |
1364 // Code generation support for subclasses. | |
1365 static ByteSize array_element_offset(int index) { | |
1366 return cell_offset(array_start_off_set + index); | |
1367 } | |
1368 | |
1369 public: | |
1370 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1371 | |
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1372 virtual bool is_ArrayData() const { return true; } |
0 | 1373 |
1374 static int static_cell_count() { | |
1375 return -1; | |
1376 } | |
1377 | |
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1378 int array_len() const { |
0 | 1379 return int_at_unchecked(array_len_off_set); |
1380 } | |
1381 | |
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1382 virtual int cell_count() const { |
0 | 1383 return array_len() + 1; |
1384 } | |
1385 | |
1386 // Code generation support | |
1387 static ByteSize array_len_offset() { | |
1388 return cell_offset(array_len_off_set); | |
1389 } | |
1390 static ByteSize array_start_offset() { | |
1391 return cell_offset(array_start_off_set); | |
1392 } | |
1393 }; | |
1394 | |
1395 // MultiBranchData | |
1396 // | |
1397 // A MultiBranchData is used to access profiling information for | |
1398 // a multi-way branch (*switch bytecodes). It consists of a series | |
1399 // of (count, displacement) pairs, which count the number of times each | |
1400 // case was taken and specify the data displacment for each branch target. | |
1401 class MultiBranchData : public ArrayData { | |
1402 protected: | |
1403 enum { | |
1404 default_count_off_set, | |
1405 default_disaplacement_off_set, | |
1406 case_array_start | |
1407 }; | |
1408 enum { | |
1409 relative_count_off_set, | |
1410 relative_displacement_off_set, | |
1411 per_case_cell_count | |
1412 }; | |
1413 | |
1414 void set_default_displacement(int displacement) { | |
1415 array_set_int_at(default_disaplacement_off_set, displacement); | |
1416 } | |
1417 void set_displacement_at(int index, int displacement) { | |
1418 array_set_int_at(case_array_start + | |
1419 index * per_case_cell_count + | |
1420 relative_displacement_off_set, | |
1421 displacement); | |
1422 } | |
1423 | |
1424 public: | |
1425 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1426 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1427 } | |
1428 | |
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1429 virtual bool is_MultiBranchData() const { return true; } |
0 | 1430 |
1431 static int compute_cell_count(BytecodeStream* stream); | |
1432 | |
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1433 int number_of_cases() const { |
0 | 1434 int alen = array_len() - 2; // get rid of default case here. |
1435 assert(alen % per_case_cell_count == 0, "must be even"); | |
1436 return (alen / per_case_cell_count); | |
1437 } | |
1438 | |
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1439 uint default_count() const { |
0 | 1440 return array_uint_at(default_count_off_set); |
1441 } | |
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1442 int default_displacement() const { |
0 | 1443 return array_int_at(default_disaplacement_off_set); |
1444 } | |
1445 | |
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1446 uint count_at(int index) const { |
0 | 1447 return array_uint_at(case_array_start + |
1448 index * per_case_cell_count + | |
1449 relative_count_off_set); | |
1450 } | |
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1451 int displacement_at(int index) const { |
0 | 1452 return array_int_at(case_array_start + |
1453 index * per_case_cell_count + | |
1454 relative_displacement_off_set); | |
1455 } | |
1456 | |
1457 // Code generation support | |
1458 static ByteSize default_count_offset() { | |
1459 return array_element_offset(default_count_off_set); | |
1460 } | |
1461 static ByteSize default_displacement_offset() { | |
1462 return array_element_offset(default_disaplacement_off_set); | |
1463 } | |
1464 static ByteSize case_count_offset(int index) { | |
1465 return case_array_offset() + | |
1466 (per_case_size() * index) + | |
1467 relative_count_offset(); | |
1468 } | |
1469 static ByteSize case_array_offset() { | |
1470 return array_element_offset(case_array_start); | |
1471 } | |
1472 static ByteSize per_case_size() { | |
1473 return in_ByteSize(per_case_cell_count) * cell_size; | |
1474 } | |
1475 static ByteSize relative_count_offset() { | |
1476 return in_ByteSize(relative_count_off_set) * cell_size; | |
1477 } | |
1478 static ByteSize relative_displacement_offset() { | |
1479 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1480 } | |
1481 | |
1482 // Specific initialization. | |
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1483 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1484 |
1485 #ifndef PRODUCT | |
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1486 void print_data_on(outputStream* st) const; |
0 | 1487 #endif |
1488 }; | |
1489 | |
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1490 class ArgInfoData : public ArrayData { |
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1491 |
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1492 public: |
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1493 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1494 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1495 } |
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1496 |
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1497 virtual bool is_ArgInfoData() const { return true; } |
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1498 |
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1499 |
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1500 int number_of_args() const { |
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1501 return array_len(); |
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1502 } |
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1503 |
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1504 uint arg_modified(int arg) const { |
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1505 return array_uint_at(arg); |
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1506 } |
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1507 |
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1508 void set_arg_modified(int arg, uint val) { |
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1509 array_set_int_at(arg, val); |
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1510 } |
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1511 |
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1512 #ifndef PRODUCT |
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1513 void print_data_on(outputStream* st) const; |
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1514 #endif |
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1515 }; |
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1516 |
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1517 // MethodData* |
0 | 1518 // |
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1519 // A MethodData* holds information which has been collected about |
0 | 1520 // a method. Its layout looks like this: |
1521 // | |
1522 // ----------------------------- | |
1523 // | header | | |
1524 // | klass | | |
1525 // ----------------------------- | |
1526 // | method | | |
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1527 // | size of the MethodData* | |
0 | 1528 // ----------------------------- |
1529 // | Data entries... | | |
1530 // | (variable size) | | |
1531 // | | | |
1532 // . . | |
1533 // . . | |
1534 // . . | |
1535 // | | | |
1536 // ----------------------------- | |
1537 // | |
1538 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1539 // DataLayout in the array corresponds to a specific bytecode in the | |
1540 // method. The entries in the array are sorted by the corresponding | |
1541 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1542 // which point to the underlying blocks of DataLayout structures. | |
1543 // | |
1544 // During interpretation, if profiling in enabled, the interpreter | |
1545 // maintains a method data pointer (mdp), which points at the entry | |
1546 // in the array corresponding to the current bci. In the course of | |
1547 // intepretation, when a bytecode is encountered that has profile data | |
1548 // associated with it, the entry pointed to by mdp is updated, then the | |
1549 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1550 // is NULL to begin with, the interpreter assumes that the current method | |
1551 // is not (yet) being profiled. | |
1552 // | |
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1553 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1554 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1555 // from the base of the data entry array. A "displacement" is the byte offset | |
1556 // in certain ProfileData objects that indicate the amount the mdp must be | |
1557 // adjusted in the event of a change in control flow. | |
1558 // | |
1559 | |
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1560 class MethodData : public Metadata { |
0 | 1561 friend class VMStructs; |
1562 private: | |
1563 friend class ProfileData; | |
1564 | |
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1565 // Back pointer to the Method* |
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1566 Method* _method; |
0 | 1567 |
1568 // Size of this oop in bytes | |
1569 int _size; | |
1570 | |
1571 // Cached hint for bci_to_dp and bci_to_data | |
1572 int _hint_di; | |
1573 | |
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1574 MethodData(methodHandle method, int size, TRAPS); |
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1575 public: |
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1576 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1577 MethodData() {}; // For ciMethodData |
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1578 |
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1579 bool is_methodData() const volatile { return true; } |
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1580 |
0 | 1581 // Whole-method sticky bits and flags |
1582 enum { | |
3345 | 1583 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1584 _trap_hist_mask = max_jubyte, |
1585 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1586 }; // Public flag values | |
1587 private: | |
1588 uint _nof_decompiles; // count of all nmethod removals | |
1589 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1590 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1591 union { | |
1592 intptr_t _align; | |
1593 u1 _array[_trap_hist_limit]; | |
1594 } _trap_hist; | |
1595 | |
1596 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1597 intx _eflags; // flags on escape information | |
1598 intx _arg_local; // bit set of non-escaping arguments | |
1599 intx _arg_stack; // bit set of stack-allocatable arguments | |
1600 intx _arg_returned; // bit set of returned arguments | |
1601 | |
1783 | 1602 int _creation_mileage; // method mileage at MDO creation |
1603 | |
1604 // How many invocations has this MDO seen? | |
1605 // These counters are used to determine the exact age of MDO. | |
1606 // We need those because in tiered a method can be concurrently | |
1607 // executed at different levels. | |
1608 InvocationCounter _invocation_counter; | |
1609 // Same for backedges. | |
1610 InvocationCounter _backedge_counter; | |
2252 | 1611 // Counter values at the time profiling started. |
1612 int _invocation_counter_start; | |
1613 int _backedge_counter_start; | |
1783 | 1614 // Number of loops and blocks is computed when compiling the first |
1615 // time with C1. It is used to determine if method is trivial. | |
1616 short _num_loops; | |
1617 short _num_blocks; | |
1618 // Highest compile level this method has ever seen. | |
1619 u1 _highest_comp_level; | |
1620 // Same for OSR level | |
1621 u1 _highest_osr_comp_level; | |
1622 // Does this method contain anything worth profiling? | |
1623 bool _would_profile; | |
0 | 1624 |
1625 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1626 int _data_size; | |
1627 | |
1628 // Beginning of the data entries | |
1629 intptr_t _data[1]; | |
1630 | |
1631 // Helper for size computation | |
1632 static int compute_data_size(BytecodeStream* stream); | |
1633 static int bytecode_cell_count(Bytecodes::Code code); | |
1634 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1635 | |
1636 // Helper for initialization | |
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1637 DataLayout* data_layout_at(int data_index) const { |
0 | 1638 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1639 return (DataLayout*) (((address)_data) + data_index); | |
1640 } | |
1641 | |
1642 // Initialize an individual data segment. Returns the size of | |
1643 // the segment in bytes. | |
1644 int initialize_data(BytecodeStream* stream, int data_index); | |
1645 | |
1646 // Helper for data_at | |
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1647 DataLayout* limit_data_position() const { |
0 | 1648 return (DataLayout*)((address)data_base() + _data_size); |
1649 } | |
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1650 bool out_of_bounds(int data_index) const { |
0 | 1651 return data_index >= data_size(); |
1652 } | |
1653 | |
1654 // Give each of the data entries a chance to perform specific | |
1655 // data initialization. | |
1656 void post_initialize(BytecodeStream* stream); | |
1657 | |
1658 // hint accessors | |
1659 int hint_di() const { return _hint_di; } | |
1660 void set_hint_di(int di) { | |
1661 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1662 _hint_di = di; | |
1663 } | |
1664 ProfileData* data_before(int bci) { | |
1665 // avoid SEGV on this edge case | |
1666 if (data_size() == 0) | |
1667 return NULL; | |
1668 int hint = hint_di(); | |
1669 if (data_layout_at(hint)->bci() <= bci) | |
1670 return data_at(hint); | |
1671 return first_data(); | |
1672 } | |
1673 | |
1674 // What is the index of the first data entry? | |
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1675 int first_di() const { return 0; } |
0 | 1676 |
1677 // Find or create an extra ProfileData: | |
1678 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1679 | |
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1680 // return the argument info cell |
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1681 ArgInfoData *arg_info(); |
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1682 |
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1683 enum { |
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1684 no_type_profile = 0, |
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1685 type_profile_jsr292 = 1, |
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1686 type_profile_all = 2 |
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1687 }; |
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1688 |
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1689 static bool profile_jsr292(methodHandle m, int bci); |
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1690 static int profile_arguments_flag(); |
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1691 static bool profile_arguments_jsr292_only(); |
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1692 static bool profile_all_arguments(); |
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1693 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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1694 |
0 | 1695 public: |
1696 static int header_size() { | |
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1697 return sizeof(MethodData)/wordSize; |
0 | 1698 } |
1699 | |
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1700 // Compute the size of a MethodData* before it is created. |
0 | 1701 static int compute_allocation_size_in_bytes(methodHandle method); |
1702 static int compute_allocation_size_in_words(methodHandle method); | |
1703 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1704 | |
1705 // Determine if a given bytecode can have profile information. | |
1706 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1707 return bytecode_cell_count(code) != no_profile_data; | |
1708 } | |
1709 | |
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1710 // reset into original state |
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1711 void init(); |
0 | 1712 |
1713 // My size | |
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1714 int size_in_bytes() const { return _size; } |
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1715 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1716 #if INCLUDE_SERVICES |
1717 void collect_statistics(KlassSizeStats *sz) const; | |
1718 #endif | |
0 | 1719 |
1720 int creation_mileage() const { return _creation_mileage; } | |
1721 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1722 |
1723 int invocation_count() { | |
1724 if (invocation_counter()->carry()) { | |
1725 return InvocationCounter::count_limit; | |
1726 } | |
1727 return invocation_counter()->count(); | |
1728 } | |
1729 int backedge_count() { | |
1730 if (backedge_counter()->carry()) { | |
1731 return InvocationCounter::count_limit; | |
1732 } | |
1733 return backedge_counter()->count(); | |
1734 } | |
1735 | |
2252 | 1736 int invocation_count_start() { |
1737 if (invocation_counter()->carry()) { | |
1738 return 0; | |
1739 } | |
1740 return _invocation_counter_start; | |
1741 } | |
1742 | |
1743 int backedge_count_start() { | |
1744 if (backedge_counter()->carry()) { | |
1745 return 0; | |
1746 } | |
1747 return _backedge_counter_start; | |
1748 } | |
1749 | |
1750 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1751 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1752 | |
1753 void reset_start_counters() { | |
1754 _invocation_counter_start = invocation_count(); | |
1755 _backedge_counter_start = backedge_count(); | |
1756 } | |
1757 | |
1783 | 1758 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1759 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1760 | |
1761 void set_would_profile(bool p) { _would_profile = p; } | |
1762 bool would_profile() const { return _would_profile; } | |
1763 | |
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1764 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 1765 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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1766 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 1767 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
1768 | |
1769 int num_loops() const { return _num_loops; } | |
1770 void set_num_loops(int n) { _num_loops = n; } | |
1771 int num_blocks() const { return _num_blocks; } | |
1772 void set_num_blocks(int n) { _num_blocks = n; } | |
1773 | |
0 | 1774 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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1775 static int mileage_of(Method* m); |
0 | 1776 |
1777 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1778 enum EscapeFlag { | |
1779 estimated = 1 << 0, | |
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1780 return_local = 1 << 1, |
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1781 return_allocated = 1 << 2, |
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1782 allocated_escapes = 1 << 3, |
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1783 unknown_modified = 1 << 4 |
0 | 1784 }; |
1785 | |
1786 intx eflags() { return _eflags; } | |
1787 intx arg_local() { return _arg_local; } | |
1788 intx arg_stack() { return _arg_stack; } | |
1789 intx arg_returned() { return _arg_returned; } | |
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1790 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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1791 assert(aid != NULL, "arg_info must be not null"); |
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1792 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1793 return aid->arg_modified(a); } |
0 | 1794 |
1795 void set_eflags(intx v) { _eflags = v; } | |
1796 void set_arg_local(intx v) { _arg_local = v; } | |
1797 void set_arg_stack(intx v) { _arg_stack = v; } | |
1798 void set_arg_returned(intx v) { _arg_returned = v; } | |
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1799 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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1800 assert(aid != NULL, "arg_info must be not null"); |
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1801 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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1802 aid->set_arg_modified(a, v); } |
0 | 1803 |
1804 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
1805 | |
1806 // Location and size of data area | |
1807 address data_base() const { | |
1808 return (address) _data; | |
1809 } | |
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1810 int data_size() const { |
0 | 1811 return _data_size; |
1812 } | |
1813 | |
1814 // Accessors | |
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1815 Method* method() const { return _method; } |
0 | 1816 |
1817 // Get the data at an arbitrary (sort of) data index. | |
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1818 ProfileData* data_at(int data_index) const; |
0 | 1819 |
1820 // Walk through the data in order. | |
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1821 ProfileData* first_data() const { return data_at(first_di()); } |
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1822 ProfileData* next_data(ProfileData* current) const; |
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1823 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 1824 |
1825 // Convert a dp (data pointer) to a di (data index). | |
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1826 int dp_to_di(address dp) const { |
0 | 1827 return dp - ((address)_data); |
1828 } | |
1829 | |
1830 address di_to_dp(int di) { | |
1831 return (address)data_layout_at(di); | |
1832 } | |
1833 | |
1834 // bci to di/dp conversion. | |
1835 address bci_to_dp(int bci); | |
1836 int bci_to_di(int bci) { | |
1837 return dp_to_di(bci_to_dp(bci)); | |
1838 } | |
1839 | |
1840 // Get the data at an arbitrary bci, or NULL if there is none. | |
1841 ProfileData* bci_to_data(int bci); | |
1842 | |
1843 // Same, but try to create an extra_data record if one is needed: | |
1844 ProfileData* allocate_bci_to_data(int bci) { | |
1845 ProfileData* data = bci_to_data(bci); | |
1846 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
1847 } | |
1848 | |
1849 // Add a handful of extra data records, for trap tracking. | |
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1850 DataLayout* extra_data_base() const { return limit_data_position(); } |
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1851 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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1852 int extra_data_size() const { return (address)extra_data_limit() |
0 | 1853 - (address)extra_data_base(); } |
1854 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
1855 | |
1856 // Return (uint)-1 for overflow. | |
1857 uint trap_count(int reason) const { | |
1858 assert((uint)reason < _trap_hist_limit, "oob"); | |
1859 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
1860 } | |
1861 // For loops: | |
1862 static uint trap_reason_limit() { return _trap_hist_limit; } | |
1863 static uint trap_count_limit() { return _trap_hist_mask; } | |
1864 uint inc_trap_count(int reason) { | |
1865 // Count another trap, anywhere in this method. | |
1866 assert(reason >= 0, "must be single trap"); | |
1867 if ((uint)reason < _trap_hist_limit) { | |
1868 uint cnt1 = 1 + _trap_hist._array[reason]; | |
1869 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
1870 _trap_hist._array[reason] = cnt1; | |
1871 return cnt1; | |
1872 } else { | |
1873 return _trap_hist_mask + (++_nof_overflow_traps); | |
1874 } | |
1875 } else { | |
1876 // Could not represent the count in the histogram. | |
1877 return (++_nof_overflow_traps); | |
1878 } | |
1879 } | |
1880 | |
1881 uint overflow_trap_count() const { | |
1882 return _nof_overflow_traps; | |
1883 } | |
1884 uint overflow_recompile_count() const { | |
1885 return _nof_overflow_recompiles; | |
1886 } | |
1887 void inc_overflow_recompile_count() { | |
1888 _nof_overflow_recompiles += 1; | |
1889 } | |
1890 uint decompile_count() const { | |
1891 return _nof_decompiles; | |
1892 } | |
1893 void inc_decompile_count() { | |
1894 _nof_decompiles += 1; | |
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1895 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 1896 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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1897 } |
0 | 1898 } |
1899 | |
1900 // Support for code generation | |
1901 static ByteSize data_offset() { | |
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1902 return byte_offset_of(MethodData, _data[0]); |
0 | 1903 } |
1904 | |
1783 | 1905 static ByteSize invocation_counter_offset() { |
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1906 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 1907 } |
1908 static ByteSize backedge_counter_offset() { | |
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1909 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 1910 } |
1911 | |
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1912 // Deallocation support - no pointer fields to deallocate |
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1913 void deallocate_contents(ClassLoaderData* loader_data) {} |
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1914 |
0 | 1915 // GC support |
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1916 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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1917 |
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1918 // Printing |
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1919 #ifndef PRODUCT |
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1920 void print_on (outputStream* st) const; |
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1921 #endif |
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1922 void print_value_on(outputStream* st) const; |
0 | 1923 |
1924 #ifndef PRODUCT | |
1925 // printing support for method data | |
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1926 void print_data_on(outputStream* st) const; |
0 | 1927 #endif |
1928 | |
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1929 const char* internal_name() const { return "{method data}"; } |
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1930 |
0 | 1931 // verification |
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1932 void verify_on(outputStream* st); |
0 | 1933 void verify_data_on(outputStream* st); |
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1934 |
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1935 static bool profile_arguments(); |
0 | 1936 }; |
1972 | 1937 |
1938 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |