Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.hpp @ 17511:2185d483f5f8
8032566: Crash in JIT when running Scala compiler (and compiling Scala std lib)
Summary: Switch off EliminateAutoBox flag by default in jdk8 release.
Reviewed-by: iveresov
author | kvn |
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date | Mon, 27 Jan 2014 10:20:51 -0800 |
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0 | 1 /* |
7956 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_METHODDATAOOP_HPP |
26 #define SHARE_VM_OOPS_METHODDATAOOP_HPP | |
27 | |
28 #include "interpreter/bytecodes.hpp" | |
29 #include "memory/universe.hpp" | |
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30 #include "oops/method.hpp" |
1972 | 31 #include "oops/oop.hpp" |
32 #include "runtime/orderAccess.hpp" | |
33 | |
0 | 34 class BytecodeStream; |
7956 | 35 class KlassSizeStats; |
0 | 36 |
37 // The MethodData object collects counts and other profile information | |
38 // during zeroth-tier (interpretive) and first-tier execution. | |
39 // The profile is used later by compilation heuristics. Some heuristics | |
40 // enable use of aggressive (or "heroic") optimizations. An aggressive | |
41 // optimization often has a down-side, a corner case that it handles | |
42 // poorly, but which is thought to be rare. The profile provides | |
43 // evidence of this rarity for a given method or even BCI. It allows | |
44 // the compiler to back out of the optimization at places where it | |
45 // has historically been a poor choice. Other heuristics try to use | |
46 // specific information gathered about types observed at a given site. | |
47 // | |
48 // All data in the profile is approximate. It is expected to be accurate | |
49 // on the whole, but the system expects occasional inaccuraces, due to | |
50 // counter overflow, multiprocessor races during data collection, space | |
51 // limitations, missing MDO blocks, etc. Bad or missing data will degrade | |
52 // optimization quality but will not affect correctness. Also, each MDO | |
53 // is marked with its birth-date ("creation_mileage") which can be used | |
54 // to assess the quality ("maturity") of its data. | |
55 // | |
56 // Short (<32-bit) counters are designed to overflow to a known "saturated" | |
57 // state. Also, certain recorded per-BCI events are given one-bit counters | |
58 // which overflow to a saturated state which applied to all counters at | |
59 // that BCI. In other words, there is a small lattice which approximates | |
60 // the ideal of an infinite-precision counter for each event at each BCI, | |
61 // and the lattice quickly "bottoms out" in a state where all counters | |
62 // are taken to be indefinitely large. | |
63 // | |
64 // The reader will find many data races in profile gathering code, starting | |
65 // with invocation counter incrementation. None of these races harm correct | |
66 // execution of the compiled code. | |
67 | |
941 | 68 // forward decl |
69 class ProfileData; | |
70 | |
0 | 71 // DataLayout |
72 // | |
73 // Overlay for generic profiling data. | |
74 class DataLayout VALUE_OBJ_CLASS_SPEC { | |
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75 friend class VMStructs; |
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76 |
0 | 77 private: |
78 // Every data layout begins with a header. This header | |
79 // contains a tag, which is used to indicate the size/layout | |
80 // of the data, 4 bits of flags, which can be used in any way, | |
81 // 4 bits of trap history (none/one reason/many reasons), | |
82 // and a bci, which is used to tie this piece of data to a | |
83 // specific bci in the bytecodes. | |
84 union { | |
85 intptr_t _bits; | |
86 struct { | |
87 u1 _tag; | |
88 u1 _flags; | |
89 u2 _bci; | |
90 } _struct; | |
91 } _header; | |
92 | |
93 // The data layout has an arbitrary number of cells, each sized | |
94 // to accomodate a pointer or an integer. | |
95 intptr_t _cells[1]; | |
96 | |
97 // Some types of data layouts need a length field. | |
98 static bool needs_array_len(u1 tag); | |
99 | |
100 public: | |
101 enum { | |
102 counter_increment = 1 | |
103 }; | |
104 | |
105 enum { | |
106 cell_size = sizeof(intptr_t) | |
107 }; | |
108 | |
109 // Tag values | |
110 enum { | |
111 no_tag, | |
112 bit_data_tag, | |
113 counter_data_tag, | |
114 jump_data_tag, | |
115 receiver_type_data_tag, | |
116 virtual_call_data_tag, | |
117 ret_data_tag, | |
118 branch_data_tag, | |
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119 multi_branch_data_tag, |
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120 arg_info_data_tag, |
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121 call_type_data_tag, |
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122 virtual_call_type_data_tag, |
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123 parameters_type_data_tag |
0 | 124 }; |
125 | |
126 enum { | |
127 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
128 // The trap state breaks down further as [recompile:1 | reason:3]. | |
129 // This further breakdown is defined in deoptimization.cpp. | |
130 // See Deoptimization::trap_state_reason for an assert that | |
131 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
132 // | |
133 // The trap_state is collected only if ProfileTraps is true. | |
134 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
135 trap_shift = BitsPerByte - trap_bits, | |
136 trap_mask = right_n_bits(trap_bits), | |
137 trap_mask_in_place = (trap_mask << trap_shift), | |
138 flag_limit = trap_shift, | |
139 flag_mask = right_n_bits(flag_limit), | |
140 first_flag = 0 | |
141 }; | |
142 | |
143 // Size computation | |
144 static int header_size_in_bytes() { | |
145 return cell_size; | |
146 } | |
147 static int header_size_in_cells() { | |
148 return 1; | |
149 } | |
150 | |
151 static int compute_size_in_bytes(int cell_count) { | |
152 return header_size_in_bytes() + cell_count * cell_size; | |
153 } | |
154 | |
155 // Initialization | |
156 void initialize(u1 tag, u2 bci, int cell_count); | |
157 | |
158 // Accessors | |
159 u1 tag() { | |
160 return _header._struct._tag; | |
161 } | |
162 | |
163 // Return a few bits of trap state. Range is [0..trap_mask]. | |
164 // The state tells if traps with zero, one, or many reasons have occurred. | |
165 // It also tells whether zero or many recompilations have occurred. | |
166 // The associated trap histogram in the MDO itself tells whether | |
167 // traps are common or not. If a BCI shows that a trap X has | |
168 // occurred, and the MDO shows N occurrences of X, we make the | |
169 // simplifying assumption that all N occurrences can be blamed | |
170 // on that BCI. | |
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171 int trap_state() const { |
0 | 172 return ((_header._struct._flags >> trap_shift) & trap_mask); |
173 } | |
174 | |
175 void set_trap_state(int new_state) { | |
176 assert(ProfileTraps, "used only under +ProfileTraps"); | |
177 uint old_flags = (_header._struct._flags & flag_mask); | |
178 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
179 } | |
180 | |
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181 u1 flags() const { |
0 | 182 return _header._struct._flags; |
183 } | |
184 | |
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185 u2 bci() const { |
0 | 186 return _header._struct._bci; |
187 } | |
188 | |
189 void set_header(intptr_t value) { | |
190 _header._bits = value; | |
191 } | |
192 void release_set_header(intptr_t value) { | |
193 OrderAccess::release_store_ptr(&_header._bits, value); | |
194 } | |
195 intptr_t header() { | |
196 return _header._bits; | |
197 } | |
198 void set_cell_at(int index, intptr_t value) { | |
199 _cells[index] = value; | |
200 } | |
201 void release_set_cell_at(int index, intptr_t value) { | |
202 OrderAccess::release_store_ptr(&_cells[index], value); | |
203 } | |
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204 intptr_t cell_at(int index) const { |
0 | 205 return _cells[index]; |
206 } | |
207 | |
208 void set_flag_at(int flag_number) { | |
209 assert(flag_number < flag_limit, "oob"); | |
210 _header._struct._flags |= (0x1 << flag_number); | |
211 } | |
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212 bool flag_at(int flag_number) const { |
0 | 213 assert(flag_number < flag_limit, "oob"); |
214 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
215 } | |
216 | |
217 // Low-level support for code generation. | |
218 static ByteSize header_offset() { | |
219 return byte_offset_of(DataLayout, _header); | |
220 } | |
221 static ByteSize tag_offset() { | |
222 return byte_offset_of(DataLayout, _header._struct._tag); | |
223 } | |
224 static ByteSize flags_offset() { | |
225 return byte_offset_of(DataLayout, _header._struct._flags); | |
226 } | |
227 static ByteSize bci_offset() { | |
228 return byte_offset_of(DataLayout, _header._struct._bci); | |
229 } | |
230 static ByteSize cell_offset(int index) { | |
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231 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 232 } |
233 // Return a value which, when or-ed as a byte into _flags, sets the flag. | |
234 static int flag_number_to_byte_constant(int flag_number) { | |
235 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
236 DataLayout temp; temp.set_header(0); | |
237 temp.set_flag_at(flag_number); | |
238 return temp._header._struct._flags; | |
239 } | |
240 // Return a value which, when or-ed as a word into _header, sets the flag. | |
241 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
242 DataLayout temp; temp.set_header(0); | |
243 temp._header._struct._flags = byte_constant; | |
244 return temp._header._bits; | |
245 } | |
941 | 246 |
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247 ProfileData* data_in(); |
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248 |
941 | 249 // GC support |
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250 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 251 }; |
252 | |
253 | |
254 // ProfileData class hierarchy | |
255 class ProfileData; | |
256 class BitData; | |
257 class CounterData; | |
258 class ReceiverTypeData; | |
259 class VirtualCallData; | |
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260 class VirtualCallTypeData; |
0 | 261 class RetData; |
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262 class CallTypeData; |
0 | 263 class JumpData; |
264 class BranchData; | |
265 class ArrayData; | |
266 class MultiBranchData; | |
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267 class ArgInfoData; |
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268 class ParametersTypeData; |
0 | 269 |
270 // ProfileData | |
271 // | |
272 // A ProfileData object is created to refer to a section of profiling | |
273 // data in a structured way. | |
274 class ProfileData : public ResourceObj { | |
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275 friend class TypeEntries; |
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276 friend class ReturnTypeEntry; |
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277 friend class TypeStackSlotEntries; |
0 | 278 private: |
279 #ifndef PRODUCT | |
280 enum { | |
281 tab_width_one = 16, | |
282 tab_width_two = 36 | |
283 }; | |
284 #endif // !PRODUCT | |
285 | |
286 // This is a pointer to a section of profiling data. | |
287 DataLayout* _data; | |
288 | |
289 protected: | |
290 DataLayout* data() { return _data; } | |
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291 const DataLayout* data() const { return _data; } |
0 | 292 |
293 enum { | |
294 cell_size = DataLayout::cell_size | |
295 }; | |
296 | |
297 public: | |
298 // How many cells are in this? | |
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299 virtual int cell_count() const { |
0 | 300 ShouldNotReachHere(); |
301 return -1; | |
302 } | |
303 | |
304 // Return the size of this data. | |
305 int size_in_bytes() { | |
306 return DataLayout::compute_size_in_bytes(cell_count()); | |
307 } | |
308 | |
309 protected: | |
310 // Low-level accessors for underlying data | |
311 void set_intptr_at(int index, intptr_t value) { | |
312 assert(0 <= index && index < cell_count(), "oob"); | |
313 data()->set_cell_at(index, value); | |
314 } | |
315 void release_set_intptr_at(int index, intptr_t value) { | |
316 assert(0 <= index && index < cell_count(), "oob"); | |
317 data()->release_set_cell_at(index, value); | |
318 } | |
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319 intptr_t intptr_at(int index) const { |
0 | 320 assert(0 <= index && index < cell_count(), "oob"); |
321 return data()->cell_at(index); | |
322 } | |
323 void set_uint_at(int index, uint value) { | |
324 set_intptr_at(index, (intptr_t) value); | |
325 } | |
326 void release_set_uint_at(int index, uint value) { | |
327 release_set_intptr_at(index, (intptr_t) value); | |
328 } | |
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329 uint uint_at(int index) const { |
0 | 330 return (uint)intptr_at(index); |
331 } | |
332 void set_int_at(int index, int value) { | |
333 set_intptr_at(index, (intptr_t) value); | |
334 } | |
335 void release_set_int_at(int index, int value) { | |
336 release_set_intptr_at(index, (intptr_t) value); | |
337 } | |
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338 int int_at(int index) const { |
0 | 339 return (int)intptr_at(index); |
340 } | |
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341 int int_at_unchecked(int index) const { |
0 | 342 return (int)data()->cell_at(index); |
343 } | |
344 void set_oop_at(int index, oop value) { | |
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345 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 346 } |
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347 oop oop_at(int index) const { |
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348 return cast_to_oop(intptr_at(index)); |
0 | 349 } |
350 | |
351 void set_flag_at(int flag_number) { | |
352 data()->set_flag_at(flag_number); | |
353 } | |
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354 bool flag_at(int flag_number) const { |
0 | 355 return data()->flag_at(flag_number); |
356 } | |
357 | |
358 // two convenient imports for use by subclasses: | |
359 static ByteSize cell_offset(int index) { | |
360 return DataLayout::cell_offset(index); | |
361 } | |
362 static int flag_number_to_byte_constant(int flag_number) { | |
363 return DataLayout::flag_number_to_byte_constant(flag_number); | |
364 } | |
365 | |
366 ProfileData(DataLayout* data) { | |
367 _data = data; | |
368 } | |
369 | |
370 public: | |
371 // Constructor for invalid ProfileData. | |
372 ProfileData(); | |
373 | |
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374 u2 bci() const { |
0 | 375 return data()->bci(); |
376 } | |
377 | |
378 address dp() { | |
379 return (address)_data; | |
380 } | |
381 | |
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382 int trap_state() const { |
0 | 383 return data()->trap_state(); |
384 } | |
385 void set_trap_state(int new_state) { | |
386 data()->set_trap_state(new_state); | |
387 } | |
388 | |
389 // Type checking | |
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390 virtual bool is_BitData() const { return false; } |
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391 virtual bool is_CounterData() const { return false; } |
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392 virtual bool is_JumpData() const { return false; } |
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393 virtual bool is_ReceiverTypeData()const { return false; } |
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394 virtual bool is_VirtualCallData() const { return false; } |
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395 virtual bool is_RetData() const { return false; } |
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396 virtual bool is_BranchData() const { return false; } |
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397 virtual bool is_ArrayData() const { return false; } |
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398 virtual bool is_MultiBranchData() const { return false; } |
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399 virtual bool is_ArgInfoData() const { return false; } |
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400 virtual bool is_CallTypeData() const { return false; } |
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401 virtual bool is_VirtualCallTypeData()const { return false; } |
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402 virtual bool is_ParametersTypeData() const { return false; } |
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403 |
0 | 404 |
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405 BitData* as_BitData() const { |
0 | 406 assert(is_BitData(), "wrong type"); |
407 return is_BitData() ? (BitData*) this : NULL; | |
408 } | |
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409 CounterData* as_CounterData() const { |
0 | 410 assert(is_CounterData(), "wrong type"); |
411 return is_CounterData() ? (CounterData*) this : NULL; | |
412 } | |
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413 JumpData* as_JumpData() const { |
0 | 414 assert(is_JumpData(), "wrong type"); |
415 return is_JumpData() ? (JumpData*) this : NULL; | |
416 } | |
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417 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 418 assert(is_ReceiverTypeData(), "wrong type"); |
419 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
420 } | |
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421 VirtualCallData* as_VirtualCallData() const { |
0 | 422 assert(is_VirtualCallData(), "wrong type"); |
423 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
424 } | |
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425 RetData* as_RetData() const { |
0 | 426 assert(is_RetData(), "wrong type"); |
427 return is_RetData() ? (RetData*) this : NULL; | |
428 } | |
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429 BranchData* as_BranchData() const { |
0 | 430 assert(is_BranchData(), "wrong type"); |
431 return is_BranchData() ? (BranchData*) this : NULL; | |
432 } | |
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433 ArrayData* as_ArrayData() const { |
0 | 434 assert(is_ArrayData(), "wrong type"); |
435 return is_ArrayData() ? (ArrayData*) this : NULL; | |
436 } | |
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437 MultiBranchData* as_MultiBranchData() const { |
0 | 438 assert(is_MultiBranchData(), "wrong type"); |
439 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
440 } | |
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441 ArgInfoData* as_ArgInfoData() const { |
45
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442 assert(is_ArgInfoData(), "wrong type"); |
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443 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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444 } |
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445 CallTypeData* as_CallTypeData() const { |
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446 assert(is_CallTypeData(), "wrong type"); |
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447 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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448 } |
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449 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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450 assert(is_VirtualCallTypeData(), "wrong type"); |
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451 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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452 } |
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453 ParametersTypeData* as_ParametersTypeData() const { |
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454 assert(is_ParametersTypeData(), "wrong type"); |
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455 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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456 } |
0 | 457 |
458 | |
459 // Subclass specific initialization | |
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460 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 461 |
462 // GC support | |
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463 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 464 |
465 // CI translation: ProfileData can represent both MethodDataOop data | |
466 // as well as CIMethodData data. This function is provided for translating | |
467 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
468 // most ProfileData don't require any translation, so we provide the null | |
469 // translation here, and the required translators are in the ci subclasses. | |
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470 virtual void translate_from(const ProfileData* data) {} |
0 | 471 |
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472 virtual void print_data_on(outputStream* st) const { |
0 | 473 ShouldNotReachHere(); |
474 } | |
475 | |
476 #ifndef PRODUCT | |
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477 void print_shared(outputStream* st, const char* name) const; |
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478 void tab(outputStream* st, bool first = false) const; |
0 | 479 #endif |
480 }; | |
481 | |
482 // BitData | |
483 // | |
484 // A BitData holds a flag or two in its header. | |
485 class BitData : public ProfileData { | |
486 protected: | |
487 enum { | |
488 // null_seen: | |
489 // saw a null operand (cast/aastore/instanceof) | |
490 null_seen_flag = DataLayout::first_flag + 0 | |
491 }; | |
492 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
493 public: | |
494 BitData(DataLayout* layout) : ProfileData(layout) { | |
495 } | |
496 | |
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497 virtual bool is_BitData() const { return true; } |
0 | 498 |
499 static int static_cell_count() { | |
500 return bit_cell_count; | |
501 } | |
502 | |
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503 virtual int cell_count() const { |
0 | 504 return static_cell_count(); |
505 } | |
506 | |
507 // Accessor | |
508 | |
509 // The null_seen flag bit is specially known to the interpreter. | |
510 // Consulting it allows the compiler to avoid setting up null_check traps. | |
511 bool null_seen() { return flag_at(null_seen_flag); } | |
512 void set_null_seen() { set_flag_at(null_seen_flag); } | |
513 | |
514 | |
515 // Code generation support | |
516 static int null_seen_byte_constant() { | |
517 return flag_number_to_byte_constant(null_seen_flag); | |
518 } | |
519 | |
520 static ByteSize bit_data_size() { | |
521 return cell_offset(bit_cell_count); | |
522 } | |
523 | |
524 #ifndef PRODUCT | |
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525 void print_data_on(outputStream* st) const; |
0 | 526 #endif |
527 }; | |
528 | |
529 // CounterData | |
530 // | |
531 // A CounterData corresponds to a simple counter. | |
532 class CounterData : public BitData { | |
533 protected: | |
534 enum { | |
535 count_off, | |
536 counter_cell_count | |
537 }; | |
538 public: | |
539 CounterData(DataLayout* layout) : BitData(layout) {} | |
540 | |
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541 virtual bool is_CounterData() const { return true; } |
0 | 542 |
543 static int static_cell_count() { | |
544 return counter_cell_count; | |
545 } | |
546 | |
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547 virtual int cell_count() const { |
0 | 548 return static_cell_count(); |
549 } | |
550 | |
551 // Direct accessor | |
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552 uint count() const { |
0 | 553 return uint_at(count_off); |
554 } | |
555 | |
556 // Code generation support | |
557 static ByteSize count_offset() { | |
558 return cell_offset(count_off); | |
559 } | |
560 static ByteSize counter_data_size() { | |
561 return cell_offset(counter_cell_count); | |
562 } | |
563 | |
1251
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564 void set_count(uint count) { |
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565 set_uint_at(count_off, count); |
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566 } |
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567 |
0 | 568 #ifndef PRODUCT |
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569 void print_data_on(outputStream* st) const; |
0 | 570 #endif |
571 }; | |
572 | |
573 // JumpData | |
574 // | |
575 // A JumpData is used to access profiling information for a direct | |
576 // branch. It is a counter, used for counting the number of branches, | |
577 // plus a data displacement, used for realigning the data pointer to | |
578 // the corresponding target bci. | |
579 class JumpData : public ProfileData { | |
580 protected: | |
581 enum { | |
582 taken_off_set, | |
583 displacement_off_set, | |
584 jump_cell_count | |
585 }; | |
586 | |
587 void set_displacement(int displacement) { | |
588 set_int_at(displacement_off_set, displacement); | |
589 } | |
590 | |
591 public: | |
592 JumpData(DataLayout* layout) : ProfileData(layout) { | |
593 assert(layout->tag() == DataLayout::jump_data_tag || | |
594 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
595 } | |
596 | |
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597 virtual bool is_JumpData() const { return true; } |
0 | 598 |
599 static int static_cell_count() { | |
600 return jump_cell_count; | |
601 } | |
602 | |
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603 virtual int cell_count() const { |
0 | 604 return static_cell_count(); |
605 } | |
606 | |
607 // Direct accessor | |
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608 uint taken() const { |
0 | 609 return uint_at(taken_off_set); |
610 } | |
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611 |
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612 void set_taken(uint cnt) { |
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613 set_uint_at(taken_off_set, cnt); |
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614 } |
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615 |
0 | 616 // Saturating counter |
617 uint inc_taken() { | |
618 uint cnt = taken() + 1; | |
619 // Did we wrap? Will compiler screw us?? | |
620 if (cnt == 0) cnt--; | |
621 set_uint_at(taken_off_set, cnt); | |
622 return cnt; | |
623 } | |
624 | |
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625 int displacement() const { |
0 | 626 return int_at(displacement_off_set); |
627 } | |
628 | |
629 // Code generation support | |
630 static ByteSize taken_offset() { | |
631 return cell_offset(taken_off_set); | |
632 } | |
633 | |
634 static ByteSize displacement_offset() { | |
635 return cell_offset(displacement_off_set); | |
636 } | |
637 | |
638 // Specific initialization. | |
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639 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 640 |
641 #ifndef PRODUCT | |
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642 void print_data_on(outputStream* st) const; |
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643 #endif |
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644 }; |
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645 |
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646 // Entries in a ProfileData object to record types: it can either be |
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647 // none (no profile), unknown (conflicting profile data) or a klass if |
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648 // a single one is seen. Whether a null reference was seen is also |
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649 // recorded. No counter is associated with the type and a single type |
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650 // is tracked (unlike VirtualCallData). |
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651 class TypeEntries { |
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652 |
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653 public: |
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654 |
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655 // A single cell is used to record information for a type: |
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656 // - the cell is initialized to 0 |
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657 // - when a type is discovered it is stored in the cell |
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658 // - bit zero of the cell is used to record whether a null reference |
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659 // was encountered or not |
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660 // - bit 1 is set to record a conflict in the type information |
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661 |
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662 enum { |
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663 null_seen = 1, |
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664 type_mask = ~null_seen, |
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665 type_unknown = 2, |
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666 status_bits = null_seen | type_unknown, |
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667 type_klass_mask = ~status_bits |
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668 }; |
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669 |
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670 // what to initialize a cell to |
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671 static intptr_t type_none() { |
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672 return 0; |
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673 } |
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674 |
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675 // null seen = bit 0 set? |
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676 static bool was_null_seen(intptr_t v) { |
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677 return (v & null_seen) != 0; |
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678 } |
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679 |
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680 // conflicting type information = bit 1 set? |
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681 static bool is_type_unknown(intptr_t v) { |
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682 return (v & type_unknown) != 0; |
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683 } |
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684 |
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685 // not type information yet = all bits cleared, ignoring bit 0? |
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686 static bool is_type_none(intptr_t v) { |
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687 return (v & type_mask) == 0; |
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688 } |
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689 |
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690 // recorded type: cell without bit 0 and 1 |
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691 static intptr_t klass_part(intptr_t v) { |
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692 intptr_t r = v & type_klass_mask; |
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693 return r; |
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694 } |
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|
695 |
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696 // type recorded |
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697 static Klass* valid_klass(intptr_t k) { |
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698 if (!is_type_none(k) && |
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699 !is_type_unknown(k)) { |
13080 | 700 Klass* res = (Klass*)klass_part(k); |
701 assert(res != NULL, "invalid"); | |
702 return res; | |
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703 } else { |
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704 return NULL; |
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|
705 } |
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|
706 } |
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|
707 |
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708 static intptr_t with_status(intptr_t k, intptr_t in) { |
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709 return k | (in & status_bits); |
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|
710 } |
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711 |
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712 static intptr_t with_status(Klass* k, intptr_t in) { |
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713 return with_status((intptr_t)k, in); |
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|
714 } |
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|
715 |
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|
716 #ifndef PRODUCT |
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717 static void print_klass(outputStream* st, intptr_t k); |
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718 #endif |
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719 |
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720 // GC support |
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721 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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722 |
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723 protected: |
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724 // ProfileData object these entries are part of |
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725 ProfileData* _pd; |
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726 // offset within the ProfileData object where the entries start |
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727 const int _base_off; |
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|
728 |
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729 TypeEntries(int base_off) |
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730 : _base_off(base_off), _pd(NULL) {} |
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731 |
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732 void set_intptr_at(int index, intptr_t value) { |
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733 _pd->set_intptr_at(index, value); |
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734 } |
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|
735 |
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736 intptr_t intptr_at(int index) const { |
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737 return _pd->intptr_at(index); |
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|
738 } |
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|
739 |
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|
740 public: |
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|
741 void set_profile_data(ProfileData* pd) { |
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742 _pd = pd; |
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|
743 } |
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|
744 }; |
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|
745 |
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746 // Type entries used for arguments passed at a call and parameters on |
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747 // method entry. 2 cells per entry: one for the type encoded as in |
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748 // TypeEntries and one initialized with the stack slot where the |
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749 // profiled object is to be found so that the interpreter can locate |
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|
750 // it quickly. |
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751 class TypeStackSlotEntries : public TypeEntries { |
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|
752 |
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|
753 private: |
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|
754 enum { |
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|
755 stack_slot_entry, |
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|
756 type_entry, |
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|
757 per_arg_cell_count |
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|
758 }; |
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|
759 |
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|
760 // offset of cell for stack slot for entry i within ProfileData object |
12882
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761 int stack_slot_offset(int i) const { |
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762 return _base_off + stack_slot_local_offset(i); |
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|
763 } |
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|
764 |
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|
765 protected: |
12882
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|
766 const int _number_of_entries; |
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|
767 |
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768 // offset of cell for type for entry i within ProfileData object |
12882
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769 int type_offset(int i) const { |
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770 return _base_off + type_local_offset(i); |
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|
771 } |
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|
772 |
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|
773 public: |
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|
774 |
12882
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775 TypeStackSlotEntries(int base_off, int nb_entries) |
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776 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
777 |
12962
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|
778 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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|
779 |
12962
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780 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
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|
781 |
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782 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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783 static int stack_slot_local_offset(int i) { |
12882
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784 return i * per_arg_cell_count + stack_slot_entry; |
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|
785 } |
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|
786 |
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787 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
788 static int type_local_offset(int i) { |
12882
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789 return i * per_arg_cell_count + type_entry; |
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|
790 } |
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|
791 |
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|
792 // stack slot for entry i |
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|
793 uint stack_slot(int i) const { |
12882
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|
794 assert(i >= 0 && i < _number_of_entries, "oob"); |
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795 return _pd->uint_at(stack_slot_offset(i)); |
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|
796 } |
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|
797 |
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|
798 // set stack slot for entry i |
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|
799 void set_stack_slot(int i, uint num) { |
12882
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800 assert(i >= 0 && i < _number_of_entries, "oob"); |
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801 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
802 } |
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|
803 |
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|
804 // type for entry i |
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|
805 intptr_t type(int i) const { |
12882
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806 assert(i >= 0 && i < _number_of_entries, "oob"); |
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807 return _pd->intptr_at(type_offset(i)); |
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|
808 } |
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|
809 |
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|
810 // set type for entry i |
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|
811 void set_type(int i, intptr_t k) { |
12882
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812 assert(i >= 0 && i < _number_of_entries, "oob"); |
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813 _pd->set_intptr_at(type_offset(i), k); |
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|
814 } |
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|
815 |
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|
816 static ByteSize per_arg_size() { |
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817 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
818 } |
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|
819 |
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|
820 static int per_arg_count() { |
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|
821 return per_arg_cell_count ; |
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|
822 } |
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|
823 |
12882
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|
824 // GC support |
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|
825 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
826 |
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|
827 #ifndef PRODUCT |
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|
828 void print_data_on(outputStream* st) const; |
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|
829 #endif |
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|
830 }; |
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|
831 |
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832 // Type entry used for return from a call. A single cell to record the |
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833 // type. |
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834 class ReturnTypeEntry : public TypeEntries { |
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835 |
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836 private: |
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837 enum { |
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838 cell_count = 1 |
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839 }; |
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840 |
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841 public: |
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842 ReturnTypeEntry(int base_off) |
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843 : TypeEntries(base_off) {} |
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844 |
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845 void post_initialize() { |
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846 set_type(type_none()); |
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847 } |
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848 |
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849 intptr_t type() const { |
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850 return _pd->intptr_at(_base_off); |
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851 } |
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852 |
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853 void set_type(intptr_t k) { |
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854 _pd->set_intptr_at(_base_off, k); |
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855 } |
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856 |
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857 static int static_cell_count() { |
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858 return cell_count; |
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859 } |
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860 |
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861 static ByteSize size() { |
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862 return in_ByteSize(cell_count * DataLayout::cell_size); |
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863 } |
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864 |
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865 ByteSize type_offset() { |
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866 return DataLayout::cell_offset(_base_off); |
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867 } |
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868 |
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869 // GC support |
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870 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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871 |
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872 #ifndef PRODUCT |
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873 void print_data_on(outputStream* st) const; |
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874 #endif |
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875 }; |
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876 |
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877 // Entries to collect type information at a call: contains arguments |
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878 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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879 // number of cells. Because the number of cells for the return type is |
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880 // smaller than the number of cells for the type of an arguments, the |
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881 // number of cells is used to tell how many arguments are profiled and |
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882 // whether a return value is profiled. See has_arguments() and |
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883 // has_return(). |
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884 class TypeEntriesAtCall { |
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885 private: |
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886 static int stack_slot_local_offset(int i) { |
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887 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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888 } |
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889 |
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890 static int argument_type_local_offset(int i) { |
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891 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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892 } |
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893 |
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894 public: |
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895 |
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896 static int header_cell_count() { |
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897 return 1; |
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898 } |
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899 |
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900 static int cell_count_local_offset() { |
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901 return 0; |
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902 } |
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903 |
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904 static int compute_cell_count(BytecodeStream* stream); |
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905 |
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906 static void initialize(DataLayout* dl, int base, int cell_count) { |
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907 int off = base + cell_count_local_offset(); |
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908 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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909 } |
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910 |
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911 static bool arguments_profiling_enabled(); |
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912 static bool return_profiling_enabled(); |
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913 |
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914 // Code generation support |
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915 static ByteSize cell_count_offset() { |
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916 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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917 } |
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918 |
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919 static ByteSize args_data_offset() { |
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920 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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921 } |
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922 |
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923 static ByteSize stack_slot_offset(int i) { |
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924 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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925 } |
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926 |
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927 static ByteSize argument_type_offset(int i) { |
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928 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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929 } |
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930 }; |
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931 |
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932 // CallTypeData |
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933 // |
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934 // A CallTypeData is used to access profiling information about a non |
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935 // virtual call for which we collect type information about arguments |
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936 // and return value. |
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937 class CallTypeData : public CounterData { |
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938 private: |
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939 // entries for arguments if any |
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940 TypeStackSlotEntries _args; |
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941 // entry for return type if any |
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942 ReturnTypeEntry _ret; |
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943 |
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944 int cell_count_global_offset() const { |
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945 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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946 } |
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947 |
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948 // number of cells not counting the header |
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949 int cell_count_no_header() const { |
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950 return uint_at(cell_count_global_offset()); |
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951 } |
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952 |
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953 void check_number_of_arguments(int total) { |
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954 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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955 } |
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956 |
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957 public: |
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958 CallTypeData(DataLayout* layout) : |
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959 CounterData(layout), |
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960 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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961 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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962 { |
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963 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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964 // Some compilers (VC++) don't want this passed in member initialization list |
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965 _args.set_profile_data(this); |
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966 _ret.set_profile_data(this); |
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967 } |
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968 |
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969 const TypeStackSlotEntries* args() const { |
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970 assert(has_arguments(), "no profiling of arguments"); |
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971 return &_args; |
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972 } |
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973 |
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974 const ReturnTypeEntry* ret() const { |
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975 assert(has_return(), "no profiling of return value"); |
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976 return &_ret; |
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977 } |
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978 |
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979 virtual bool is_CallTypeData() const { return true; } |
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980 |
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981 static int static_cell_count() { |
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982 return -1; |
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983 } |
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984 |
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985 static int compute_cell_count(BytecodeStream* stream) { |
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986 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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987 } |
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988 |
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989 static void initialize(DataLayout* dl, int cell_count) { |
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990 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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991 } |
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992 |
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993 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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994 |
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995 virtual int cell_count() const { |
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996 return CounterData::static_cell_count() + |
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997 TypeEntriesAtCall::header_cell_count() + |
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998 int_at_unchecked(cell_count_global_offset()); |
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999 } |
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1000 |
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1001 int number_of_arguments() const { |
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1002 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1003 } |
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1004 |
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1005 void set_argument_type(int i, Klass* k) { |
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1006 assert(has_arguments(), "no arguments!"); |
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1007 intptr_t current = _args.type(i); |
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1008 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1009 } |
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1010 |
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1011 void set_return_type(Klass* k) { |
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1012 assert(has_return(), "no return!"); |
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1013 intptr_t current = _ret.type(); |
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1014 _ret.set_type(TypeEntries::with_status(k, current)); |
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1015 } |
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1016 |
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1017 // An entry for a return value takes less space than an entry for an |
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1018 // argument so if the number of cells exceeds the number of cells |
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1019 // needed for an argument, this object contains type information for |
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1020 // at least one argument. |
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1021 bool has_arguments() const { |
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1022 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1023 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1024 return res; |
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1025 } |
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1026 |
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1027 // An entry for a return value takes less space than an entry for an |
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1028 // argument, so if the remainder of the number of cells divided by |
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1029 // the number of cells for an argument is not null, a return value |
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1030 // is profiled in this object. |
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1031 bool has_return() const { |
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1032 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1033 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1034 return res; |
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1035 } |
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1036 |
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1037 // Code generation support |
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1038 static ByteSize args_data_offset() { |
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1039 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1040 } |
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1041 |
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1042 // GC support |
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1043 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1044 if (has_arguments()) { |
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1045 _args.clean_weak_klass_links(is_alive_closure); |
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1046 } |
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1047 if (has_return()) { |
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1048 _ret.clean_weak_klass_links(is_alive_closure); |
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1049 } |
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1050 } |
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1051 |
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1052 #ifndef PRODUCT |
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1053 virtual void print_data_on(outputStream* st) const; |
0 | 1054 #endif |
1055 }; | |
1056 | |
1057 // ReceiverTypeData | |
1058 // | |
1059 // A ReceiverTypeData is used to access profiling information about a | |
1060 // dynamic type check. It consists of a counter which counts the total times | |
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1061 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1062 // which are used to store a type profile for the receiver of the check. |
1063 class ReceiverTypeData : public CounterData { | |
1064 protected: | |
1065 enum { | |
1066 receiver0_offset = counter_cell_count, | |
1067 count0_offset, | |
1068 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1069 }; | |
1070 | |
1071 public: | |
1072 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1073 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1074 layout->tag() == DataLayout::virtual_call_data_tag || |
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1075 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1076 } |
1077 | |
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1078 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1079 |
1080 static int static_cell_count() { | |
1081 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1082 } | |
1083 | |
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1084 virtual int cell_count() const { |
0 | 1085 return static_cell_count(); |
1086 } | |
1087 | |
1088 // Direct accessors | |
1089 static uint row_limit() { | |
1090 return TypeProfileWidth; | |
1091 } | |
1092 static int receiver_cell_index(uint row) { | |
1093 return receiver0_offset + row * receiver_type_row_cell_count; | |
1094 } | |
1095 static int receiver_count_cell_index(uint row) { | |
1096 return count0_offset + row * receiver_type_row_cell_count; | |
1097 } | |
1098 | |
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1099 Klass* receiver(uint row) const { |
0 | 1100 assert(row < row_limit(), "oob"); |
1101 | |
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1102 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1103 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1104 return recv; |
1105 } | |
1106 | |
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1107 void set_receiver(uint row, Klass* k) { |
941 | 1108 assert((uint)row < row_limit(), "oob"); |
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1109 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1110 } |
1111 | |
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1112 uint receiver_count(uint row) const { |
0 | 1113 assert(row < row_limit(), "oob"); |
1114 return uint_at(receiver_count_cell_index(row)); | |
1115 } | |
1116 | |
941 | 1117 void set_receiver_count(uint row, uint count) { |
1118 assert(row < row_limit(), "oob"); | |
1119 set_uint_at(receiver_count_cell_index(row), count); | |
1120 } | |
1121 | |
1122 void clear_row(uint row) { | |
1123 assert(row < row_limit(), "oob"); | |
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1124 // Clear total count - indicator of polymorphic call site. |
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1125 // The site may look like as monomorphic after that but |
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1126 // it allow to have more accurate profiling information because |
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1127 // there was execution phase change since klasses were unloaded. |
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1128 // If the site is still polymorphic then MDO will be updated |
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1129 // to reflect it. But it could be the case that the site becomes |
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1130 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1131 // Even if we use monomorphic (when it is not) for compilation |
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1132 // we will only have trap, deoptimization and recompile again |
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1133 // with updated MDO after executing method in Interpreter. |
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1134 // An additional receiver will be recorded in the cleaned row |
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1135 // during next call execution. |
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1136 // |
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1137 // Note: our profiling logic works with empty rows in any slot. |
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1138 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1139 // |
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1140 set_count(0); |
941 | 1141 set_receiver(row, NULL); |
1142 set_receiver_count(row, 0); | |
1143 } | |
1144 | |
0 | 1145 // Code generation support |
1146 static ByteSize receiver_offset(uint row) { | |
1147 return cell_offset(receiver_cell_index(row)); | |
1148 } | |
1149 static ByteSize receiver_count_offset(uint row) { | |
1150 return cell_offset(receiver_count_cell_index(row)); | |
1151 } | |
1152 static ByteSize receiver_type_data_size() { | |
1153 return cell_offset(static_cell_count()); | |
1154 } | |
1155 | |
1156 // GC support | |
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1157 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1158 |
1159 #ifndef PRODUCT | |
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1160 void print_receiver_data_on(outputStream* st) const; |
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1161 void print_data_on(outputStream* st) const; |
0 | 1162 #endif |
1163 }; | |
1164 | |
1165 // VirtualCallData | |
1166 // | |
1167 // A VirtualCallData is used to access profiling information about a | |
1168 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1169 class VirtualCallData : public ReceiverTypeData { | |
1170 public: | |
1171 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1172 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1173 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1174 } |
1175 | |
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1176 virtual bool is_VirtualCallData() const { return true; } |
0 | 1177 |
1178 static int static_cell_count() { | |
1179 // At this point we could add more profile state, e.g., for arguments. | |
1180 // But for now it's the same size as the base record type. | |
1181 return ReceiverTypeData::static_cell_count(); | |
1182 } | |
1183 | |
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1184 virtual int cell_count() const { |
0 | 1185 return static_cell_count(); |
1186 } | |
1187 | |
1188 // Direct accessors | |
1189 static ByteSize virtual_call_data_size() { | |
1190 return cell_offset(static_cell_count()); | |
1191 } | |
1192 | |
1193 #ifndef PRODUCT | |
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1194 void print_data_on(outputStream* st) const; |
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1195 #endif |
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1196 }; |
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1197 |
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1198 // VirtualCallTypeData |
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1199 // |
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1200 // A VirtualCallTypeData is used to access profiling information about |
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1201 // a virtual call for which we collect type information about |
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1202 // arguments and return value. |
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1203 class VirtualCallTypeData : public VirtualCallData { |
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1204 private: |
12882
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1205 // entries for arguments if any |
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1206 TypeStackSlotEntries _args; |
12882
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1207 // entry for return type if any |
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1208 ReturnTypeEntry _ret; |
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1209 |
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1210 int cell_count_global_offset() const { |
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1211 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1212 } |
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1213 |
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1214 // number of cells not counting the header |
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1215 int cell_count_no_header() const { |
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1216 return uint_at(cell_count_global_offset()); |
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1217 } |
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1218 |
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1219 void check_number_of_arguments(int total) { |
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1220 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1221 } |
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1222 |
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1223 public: |
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1224 VirtualCallTypeData(DataLayout* layout) : |
12882
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1225 VirtualCallData(layout), |
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1226 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1227 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1228 { |
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1229 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1230 // Some compilers (VC++) don't want this passed in member initialization list |
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1231 _args.set_profile_data(this); |
12882
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1232 _ret.set_profile_data(this); |
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1233 } |
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1234 |
12882
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1235 const TypeStackSlotEntries* args() const { |
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1236 assert(has_arguments(), "no profiling of arguments"); |
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1237 return &_args; |
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1238 } |
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1239 |
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1240 const ReturnTypeEntry* ret() const { |
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1241 assert(has_return(), "no profiling of return value"); |
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1242 return &_ret; |
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1243 } |
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1244 |
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1245 virtual bool is_VirtualCallTypeData() const { return true; } |
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1246 |
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1247 static int static_cell_count() { |
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1248 return -1; |
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1249 } |
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1250 |
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1251 static int compute_cell_count(BytecodeStream* stream) { |
12882
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1252 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1253 } |
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|
1254 |
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1255 static void initialize(DataLayout* dl, int cell_count) { |
12882
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1256 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1257 } |
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1258 |
12882
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1259 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1260 |
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1261 virtual int cell_count() const { |
12882
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1262 return VirtualCallData::static_cell_count() + |
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1263 TypeEntriesAtCall::header_cell_count() + |
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1264 int_at_unchecked(cell_count_global_offset()); |
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1265 } |
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|
1266 |
12882
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|
1267 int number_of_arguments() const { |
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1268 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1269 } |
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|
1270 |
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1271 void set_argument_type(int i, Klass* k) { |
12882
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1272 assert(has_arguments(), "no arguments!"); |
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1273 intptr_t current = _args.type(i); |
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1274 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1275 } |
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1276 |
12882
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1277 void set_return_type(Klass* k) { |
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1278 assert(has_return(), "no return!"); |
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1279 intptr_t current = _ret.type(); |
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1280 _ret.set_type(TypeEntries::with_status(k, current)); |
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1281 } |
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1282 |
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1283 // An entry for a return value takes less space than an entry for an |
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1284 // argument, so if the remainder of the number of cells divided by |
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1285 // the number of cells for an argument is not null, a return value |
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1286 // is profiled in this object. |
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1287 bool has_return() const { |
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1288 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1289 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1290 return res; |
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|
1291 } |
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|
1292 |
12962
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1293 // An entry for a return value takes less space than an entry for an |
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1294 // argument so if the number of cells exceeds the number of cells |
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1295 // needed for an argument, this object contains type information for |
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1296 // at least one argument. |
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1297 bool has_arguments() const { |
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1298 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1299 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1300 return res; |
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|
1301 } |
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|
1302 |
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1303 // Code generation support |
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1304 static ByteSize args_data_offset() { |
12882
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1305 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1306 } |
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1307 |
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1308 // GC support |
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1309 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1310 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
12882
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1311 if (has_arguments()) { |
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1312 _args.clean_weak_klass_links(is_alive_closure); |
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1313 } |
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1314 if (has_return()) { |
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1315 _ret.clean_weak_klass_links(is_alive_closure); |
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1316 } |
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1317 } |
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1318 |
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1319 #ifndef PRODUCT |
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1320 virtual void print_data_on(outputStream* st) const; |
0 | 1321 #endif |
1322 }; | |
1323 | |
1324 // RetData | |
1325 // | |
1326 // A RetData is used to access profiling information for a ret bytecode. | |
1327 // It is composed of a count of the number of times that the ret has | |
1328 // been executed, followed by a series of triples of the form | |
1329 // (bci, count, di) which count the number of times that some bci was the | |
1330 // target of the ret and cache a corresponding data displacement. | |
1331 class RetData : public CounterData { | |
1332 protected: | |
1333 enum { | |
1334 bci0_offset = counter_cell_count, | |
1335 count0_offset, | |
1336 displacement0_offset, | |
1337 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1338 }; | |
1339 | |
1340 void set_bci(uint row, int bci) { | |
1341 assert((uint)row < row_limit(), "oob"); | |
1342 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1343 } | |
1344 void release_set_bci(uint row, int bci) { | |
1345 assert((uint)row < row_limit(), "oob"); | |
1346 // 'release' when setting the bci acts as a valid flag for other | |
1347 // threads wrt bci_count and bci_displacement. | |
1348 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1349 } | |
1350 void set_bci_count(uint row, uint count) { | |
1351 assert((uint)row < row_limit(), "oob"); | |
1352 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1353 } | |
1354 void set_bci_displacement(uint row, int disp) { | |
1355 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1356 } | |
1357 | |
1358 public: | |
1359 RetData(DataLayout* layout) : CounterData(layout) { | |
1360 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1361 } | |
1362 | |
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1363 virtual bool is_RetData() const { return true; } |
0 | 1364 |
1365 enum { | |
1366 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1367 }; | |
1368 | |
1369 static int static_cell_count() { | |
1370 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1371 } | |
1372 | |
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1373 virtual int cell_count() const { |
0 | 1374 return static_cell_count(); |
1375 } | |
1376 | |
1377 static uint row_limit() { | |
1378 return BciProfileWidth; | |
1379 } | |
1380 static int bci_cell_index(uint row) { | |
1381 return bci0_offset + row * ret_row_cell_count; | |
1382 } | |
1383 static int bci_count_cell_index(uint row) { | |
1384 return count0_offset + row * ret_row_cell_count; | |
1385 } | |
1386 static int bci_displacement_cell_index(uint row) { | |
1387 return displacement0_offset + row * ret_row_cell_count; | |
1388 } | |
1389 | |
1390 // Direct accessors | |
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1391 int bci(uint row) const { |
0 | 1392 return int_at(bci_cell_index(row)); |
1393 } | |
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1394 uint bci_count(uint row) const { |
0 | 1395 return uint_at(bci_count_cell_index(row)); |
1396 } | |
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1397 int bci_displacement(uint row) const { |
0 | 1398 return int_at(bci_displacement_cell_index(row)); |
1399 } | |
1400 | |
1401 // Interpreter Runtime support | |
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1402 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1403 |
1404 // Code generation support | |
1405 static ByteSize bci_offset(uint row) { | |
1406 return cell_offset(bci_cell_index(row)); | |
1407 } | |
1408 static ByteSize bci_count_offset(uint row) { | |
1409 return cell_offset(bci_count_cell_index(row)); | |
1410 } | |
1411 static ByteSize bci_displacement_offset(uint row) { | |
1412 return cell_offset(bci_displacement_cell_index(row)); | |
1413 } | |
1414 | |
1415 // Specific initialization. | |
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1416 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1417 |
1418 #ifndef PRODUCT | |
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1419 void print_data_on(outputStream* st) const; |
0 | 1420 #endif |
1421 }; | |
1422 | |
1423 // BranchData | |
1424 // | |
1425 // A BranchData is used to access profiling data for a two-way branch. | |
1426 // It consists of taken and not_taken counts as well as a data displacement | |
1427 // for the taken case. | |
1428 class BranchData : public JumpData { | |
1429 protected: | |
1430 enum { | |
1431 not_taken_off_set = jump_cell_count, | |
1432 branch_cell_count | |
1433 }; | |
1434 | |
1435 void set_displacement(int displacement) { | |
1436 set_int_at(displacement_off_set, displacement); | |
1437 } | |
1438 | |
1439 public: | |
1440 BranchData(DataLayout* layout) : JumpData(layout) { | |
1441 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1442 } | |
1443 | |
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1444 virtual bool is_BranchData() const { return true; } |
0 | 1445 |
1446 static int static_cell_count() { | |
1447 return branch_cell_count; | |
1448 } | |
1449 | |
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1450 virtual int cell_count() const { |
0 | 1451 return static_cell_count(); |
1452 } | |
1453 | |
1454 // Direct accessor | |
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1455 uint not_taken() const { |
0 | 1456 return uint_at(not_taken_off_set); |
1457 } | |
1458 | |
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1459 void set_not_taken(uint cnt) { |
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1460 set_uint_at(not_taken_off_set, cnt); |
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1461 } |
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1462 |
0 | 1463 uint inc_not_taken() { |
1464 uint cnt = not_taken() + 1; | |
1465 // Did we wrap? Will compiler screw us?? | |
1466 if (cnt == 0) cnt--; | |
1467 set_uint_at(not_taken_off_set, cnt); | |
1468 return cnt; | |
1469 } | |
1470 | |
1471 // Code generation support | |
1472 static ByteSize not_taken_offset() { | |
1473 return cell_offset(not_taken_off_set); | |
1474 } | |
1475 static ByteSize branch_data_size() { | |
1476 return cell_offset(branch_cell_count); | |
1477 } | |
1478 | |
1479 // Specific initialization. | |
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1480 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1481 |
1482 #ifndef PRODUCT | |
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1483 void print_data_on(outputStream* st) const; |
0 | 1484 #endif |
1485 }; | |
1486 | |
1487 // ArrayData | |
1488 // | |
1489 // A ArrayData is a base class for accessing profiling data which does | |
1490 // not have a statically known size. It consists of an array length | |
1491 // and an array start. | |
1492 class ArrayData : public ProfileData { | |
1493 protected: | |
1494 friend class DataLayout; | |
1495 | |
1496 enum { | |
1497 array_len_off_set, | |
1498 array_start_off_set | |
1499 }; | |
1500 | |
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1501 uint array_uint_at(int index) const { |
0 | 1502 int aindex = index + array_start_off_set; |
1503 return uint_at(aindex); | |
1504 } | |
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1505 int array_int_at(int index) const { |
0 | 1506 int aindex = index + array_start_off_set; |
1507 return int_at(aindex); | |
1508 } | |
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1509 oop array_oop_at(int index) const { |
0 | 1510 int aindex = index + array_start_off_set; |
1511 return oop_at(aindex); | |
1512 } | |
1513 void array_set_int_at(int index, int value) { | |
1514 int aindex = index + array_start_off_set; | |
1515 set_int_at(aindex, value); | |
1516 } | |
1517 | |
1518 // Code generation support for subclasses. | |
1519 static ByteSize array_element_offset(int index) { | |
1520 return cell_offset(array_start_off_set + index); | |
1521 } | |
1522 | |
1523 public: | |
1524 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1525 | |
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1526 virtual bool is_ArrayData() const { return true; } |
0 | 1527 |
1528 static int static_cell_count() { | |
1529 return -1; | |
1530 } | |
1531 | |
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1532 int array_len() const { |
0 | 1533 return int_at_unchecked(array_len_off_set); |
1534 } | |
1535 | |
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1536 virtual int cell_count() const { |
0 | 1537 return array_len() + 1; |
1538 } | |
1539 | |
1540 // Code generation support | |
1541 static ByteSize array_len_offset() { | |
1542 return cell_offset(array_len_off_set); | |
1543 } | |
1544 static ByteSize array_start_offset() { | |
1545 return cell_offset(array_start_off_set); | |
1546 } | |
1547 }; | |
1548 | |
1549 // MultiBranchData | |
1550 // | |
1551 // A MultiBranchData is used to access profiling information for | |
1552 // a multi-way branch (*switch bytecodes). It consists of a series | |
1553 // of (count, displacement) pairs, which count the number of times each | |
1554 // case was taken and specify the data displacment for each branch target. | |
1555 class MultiBranchData : public ArrayData { | |
1556 protected: | |
1557 enum { | |
1558 default_count_off_set, | |
1559 default_disaplacement_off_set, | |
1560 case_array_start | |
1561 }; | |
1562 enum { | |
1563 relative_count_off_set, | |
1564 relative_displacement_off_set, | |
1565 per_case_cell_count | |
1566 }; | |
1567 | |
1568 void set_default_displacement(int displacement) { | |
1569 array_set_int_at(default_disaplacement_off_set, displacement); | |
1570 } | |
1571 void set_displacement_at(int index, int displacement) { | |
1572 array_set_int_at(case_array_start + | |
1573 index * per_case_cell_count + | |
1574 relative_displacement_off_set, | |
1575 displacement); | |
1576 } | |
1577 | |
1578 public: | |
1579 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1580 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1581 } | |
1582 | |
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1583 virtual bool is_MultiBranchData() const { return true; } |
0 | 1584 |
1585 static int compute_cell_count(BytecodeStream* stream); | |
1586 | |
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1587 int number_of_cases() const { |
0 | 1588 int alen = array_len() - 2; // get rid of default case here. |
1589 assert(alen % per_case_cell_count == 0, "must be even"); | |
1590 return (alen / per_case_cell_count); | |
1591 } | |
1592 | |
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1593 uint default_count() const { |
0 | 1594 return array_uint_at(default_count_off_set); |
1595 } | |
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1596 int default_displacement() const { |
0 | 1597 return array_int_at(default_disaplacement_off_set); |
1598 } | |
1599 | |
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1600 uint count_at(int index) const { |
0 | 1601 return array_uint_at(case_array_start + |
1602 index * per_case_cell_count + | |
1603 relative_count_off_set); | |
1604 } | |
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1605 int displacement_at(int index) const { |
0 | 1606 return array_int_at(case_array_start + |
1607 index * per_case_cell_count + | |
1608 relative_displacement_off_set); | |
1609 } | |
1610 | |
1611 // Code generation support | |
1612 static ByteSize default_count_offset() { | |
1613 return array_element_offset(default_count_off_set); | |
1614 } | |
1615 static ByteSize default_displacement_offset() { | |
1616 return array_element_offset(default_disaplacement_off_set); | |
1617 } | |
1618 static ByteSize case_count_offset(int index) { | |
1619 return case_array_offset() + | |
1620 (per_case_size() * index) + | |
1621 relative_count_offset(); | |
1622 } | |
1623 static ByteSize case_array_offset() { | |
1624 return array_element_offset(case_array_start); | |
1625 } | |
1626 static ByteSize per_case_size() { | |
1627 return in_ByteSize(per_case_cell_count) * cell_size; | |
1628 } | |
1629 static ByteSize relative_count_offset() { | |
1630 return in_ByteSize(relative_count_off_set) * cell_size; | |
1631 } | |
1632 static ByteSize relative_displacement_offset() { | |
1633 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1634 } | |
1635 | |
1636 // Specific initialization. | |
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1637 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1638 |
1639 #ifndef PRODUCT | |
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1640 void print_data_on(outputStream* st) const; |
0 | 1641 #endif |
1642 }; | |
1643 | |
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1644 class ArgInfoData : public ArrayData { |
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1645 |
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1646 public: |
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1647 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1648 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1649 } |
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1650 |
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1651 virtual bool is_ArgInfoData() const { return true; } |
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1652 |
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1653 |
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1654 int number_of_args() const { |
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1655 return array_len(); |
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1656 } |
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1657 |
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1658 uint arg_modified(int arg) const { |
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1659 return array_uint_at(arg); |
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1660 } |
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1661 |
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1662 void set_arg_modified(int arg, uint val) { |
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1663 array_set_int_at(arg, val); |
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1664 } |
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1665 |
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1666 #ifndef PRODUCT |
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1667 void print_data_on(outputStream* st) const; |
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1668 #endif |
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1669 }; |
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1670 |
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1671 // ParametersTypeData |
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1672 // |
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1673 // A ParametersTypeData is used to access profiling information about |
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1674 // types of parameters to a method |
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1675 class ParametersTypeData : public ArrayData { |
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1676 |
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1677 private: |
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1678 TypeStackSlotEntries _parameters; |
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1679 |
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1680 static int stack_slot_local_offset(int i) { |
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1681 assert_profiling_enabled(); |
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1682 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1683 } |
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1684 |
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1685 static int type_local_offset(int i) { |
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1686 assert_profiling_enabled(); |
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1687 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1688 } |
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1689 |
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1690 static bool profiling_enabled(); |
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1691 static void assert_profiling_enabled() { |
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1692 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1693 } |
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1694 |
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1695 public: |
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1696 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1697 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1698 // Some compilers (VC++) don't want this passed in member initialization list |
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1699 _parameters.set_profile_data(this); |
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1700 } |
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1701 |
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1702 static int compute_cell_count(Method* m); |
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1703 |
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1704 virtual bool is_ParametersTypeData() const { return true; } |
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1705 |
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1706 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1707 |
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1708 int number_of_parameters() const { |
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1709 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1710 } |
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1711 |
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1712 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1713 |
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1714 uint stack_slot(int i) const { |
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1715 return _parameters.stack_slot(i); |
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1716 } |
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1717 |
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1718 void set_type(int i, Klass* k) { |
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1719 intptr_t current = _parameters.type(i); |
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1720 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1721 } |
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1722 |
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1723 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1724 _parameters.clean_weak_klass_links(is_alive_closure); |
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1725 } |
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1726 |
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1727 #ifndef PRODUCT |
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1728 virtual void print_data_on(outputStream* st) const; |
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1729 #endif |
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1730 |
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1731 static ByteSize stack_slot_offset(int i) { |
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1732 return cell_offset(stack_slot_local_offset(i)); |
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1733 } |
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1734 |
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1735 static ByteSize type_offset(int i) { |
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1736 return cell_offset(type_local_offset(i)); |
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1737 } |
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1738 }; |
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1739 |
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1740 // MethodData* |
0 | 1741 // |
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1742 // A MethodData* holds information which has been collected about |
0 | 1743 // a method. Its layout looks like this: |
1744 // | |
1745 // ----------------------------- | |
1746 // | header | | |
1747 // | klass | | |
1748 // ----------------------------- | |
1749 // | method | | |
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1750 // | size of the MethodData* | |
0 | 1751 // ----------------------------- |
1752 // | Data entries... | | |
1753 // | (variable size) | | |
1754 // | | | |
1755 // . . | |
1756 // . . | |
1757 // . . | |
1758 // | | | |
1759 // ----------------------------- | |
1760 // | |
1761 // The data entry area is a heterogeneous array of DataLayouts. Each | |
1762 // DataLayout in the array corresponds to a specific bytecode in the | |
1763 // method. The entries in the array are sorted by the corresponding | |
1764 // bytecode. Access to the data is via resource-allocated ProfileData, | |
1765 // which point to the underlying blocks of DataLayout structures. | |
1766 // | |
1767 // During interpretation, if profiling in enabled, the interpreter | |
1768 // maintains a method data pointer (mdp), which points at the entry | |
1769 // in the array corresponding to the current bci. In the course of | |
1770 // intepretation, when a bytecode is encountered that has profile data | |
1771 // associated with it, the entry pointed to by mdp is updated, then the | |
1772 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
1773 // is NULL to begin with, the interpreter assumes that the current method | |
1774 // is not (yet) being profiled. | |
1775 // | |
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1776 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 1777 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
1778 // from the base of the data entry array. A "displacement" is the byte offset | |
1779 // in certain ProfileData objects that indicate the amount the mdp must be | |
1780 // adjusted in the event of a change in control flow. | |
1781 // | |
1782 | |
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1783 class MethodData : public Metadata { |
0 | 1784 friend class VMStructs; |
1785 private: | |
1786 friend class ProfileData; | |
1787 | |
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1788 // Back pointer to the Method* |
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1789 Method* _method; |
0 | 1790 |
1791 // Size of this oop in bytes | |
1792 int _size; | |
1793 | |
1794 // Cached hint for bci_to_dp and bci_to_data | |
1795 int _hint_di; | |
1796 | |
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1797 MethodData(methodHandle method, int size, TRAPS); |
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1798 public: |
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1799 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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1800 MethodData() {}; // For ciMethodData |
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1801 |
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1802 bool is_methodData() const volatile { return true; } |
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1803 |
0 | 1804 // Whole-method sticky bits and flags |
1805 enum { | |
3345 | 1806 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
0 | 1807 _trap_hist_mask = max_jubyte, |
1808 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
1809 }; // Public flag values | |
1810 private: | |
1811 uint _nof_decompiles; // count of all nmethod removals | |
1812 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
1813 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
1814 union { | |
1815 intptr_t _align; | |
1816 u1 _array[_trap_hist_limit]; | |
1817 } _trap_hist; | |
1818 | |
1819 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
1820 intx _eflags; // flags on escape information | |
1821 intx _arg_local; // bit set of non-escaping arguments | |
1822 intx _arg_stack; // bit set of stack-allocatable arguments | |
1823 intx _arg_returned; // bit set of returned arguments | |
1824 | |
1783 | 1825 int _creation_mileage; // method mileage at MDO creation |
1826 | |
1827 // How many invocations has this MDO seen? | |
1828 // These counters are used to determine the exact age of MDO. | |
1829 // We need those because in tiered a method can be concurrently | |
1830 // executed at different levels. | |
1831 InvocationCounter _invocation_counter; | |
1832 // Same for backedges. | |
1833 InvocationCounter _backedge_counter; | |
2252 | 1834 // Counter values at the time profiling started. |
1835 int _invocation_counter_start; | |
1836 int _backedge_counter_start; | |
1783 | 1837 // Number of loops and blocks is computed when compiling the first |
1838 // time with C1. It is used to determine if method is trivial. | |
1839 short _num_loops; | |
1840 short _num_blocks; | |
1841 // Highest compile level this method has ever seen. | |
1842 u1 _highest_comp_level; | |
1843 // Same for OSR level | |
1844 u1 _highest_osr_comp_level; | |
1845 // Does this method contain anything worth profiling? | |
1846 bool _would_profile; | |
0 | 1847 |
1848 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
1849 int _data_size; | |
1850 | |
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1851 // data index for the area dedicated to parameters. -1 if no |
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1852 // parameter profiling. |
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1853 int _parameters_type_data_di; |
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1854 |
0 | 1855 // Beginning of the data entries |
1856 intptr_t _data[1]; | |
1857 | |
1858 // Helper for size computation | |
1859 static int compute_data_size(BytecodeStream* stream); | |
1860 static int bytecode_cell_count(Bytecodes::Code code); | |
1861 enum { no_profile_data = -1, variable_cell_count = -2 }; | |
1862 | |
1863 // Helper for initialization | |
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1864 DataLayout* data_layout_at(int data_index) const { |
0 | 1865 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
1866 return (DataLayout*) (((address)_data) + data_index); | |
1867 } | |
1868 | |
1869 // Initialize an individual data segment. Returns the size of | |
1870 // the segment in bytes. | |
1871 int initialize_data(BytecodeStream* stream, int data_index); | |
1872 | |
1873 // Helper for data_at | |
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1874 DataLayout* limit_data_position() const { |
0 | 1875 return (DataLayout*)((address)data_base() + _data_size); |
1876 } | |
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1877 bool out_of_bounds(int data_index) const { |
0 | 1878 return data_index >= data_size(); |
1879 } | |
1880 | |
1881 // Give each of the data entries a chance to perform specific | |
1882 // data initialization. | |
1883 void post_initialize(BytecodeStream* stream); | |
1884 | |
1885 // hint accessors | |
1886 int hint_di() const { return _hint_di; } | |
1887 void set_hint_di(int di) { | |
1888 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
1889 _hint_di = di; | |
1890 } | |
1891 ProfileData* data_before(int bci) { | |
1892 // avoid SEGV on this edge case | |
1893 if (data_size() == 0) | |
1894 return NULL; | |
1895 int hint = hint_di(); | |
1896 if (data_layout_at(hint)->bci() <= bci) | |
1897 return data_at(hint); | |
1898 return first_data(); | |
1899 } | |
1900 | |
1901 // What is the index of the first data entry? | |
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1902 int first_di() const { return 0; } |
0 | 1903 |
1904 // Find or create an extra ProfileData: | |
1905 ProfileData* bci_to_extra_data(int bci, bool create_if_missing); | |
1906 | |
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1907 // return the argument info cell |
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1908 ArgInfoData *arg_info(); |
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1909 |
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1910 enum { |
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1911 no_type_profile = 0, |
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1912 type_profile_jsr292 = 1, |
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1913 type_profile_all = 2 |
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1914 }; |
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1915 |
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1916 static bool profile_jsr292(methodHandle m, int bci); |
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1917 static int profile_arguments_flag(); |
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1918 static bool profile_arguments_jsr292_only(); |
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1919 static bool profile_all_arguments(); |
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1920 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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1921 static int profile_return_flag(); |
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1922 static bool profile_all_return(); |
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1923 static bool profile_return_for_invoke(methodHandle m, int bci); |
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1924 static int profile_parameters_flag(); |
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1925 static bool profile_parameters_jsr292_only(); |
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1926 static bool profile_all_parameters(); |
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1927 |
0 | 1928 public: |
1929 static int header_size() { | |
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1930 return sizeof(MethodData)/wordSize; |
0 | 1931 } |
1932 | |
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1933 // Compute the size of a MethodData* before it is created. |
0 | 1934 static int compute_allocation_size_in_bytes(methodHandle method); |
1935 static int compute_allocation_size_in_words(methodHandle method); | |
1936 static int compute_extra_data_count(int data_size, int empty_bc_count); | |
1937 | |
1938 // Determine if a given bytecode can have profile information. | |
1939 static bool bytecode_has_profile(Bytecodes::Code code) { | |
1940 return bytecode_cell_count(code) != no_profile_data; | |
1941 } | |
1942 | |
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1943 // reset into original state |
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1944 void init(); |
0 | 1945 |
1946 // My size | |
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1947 int size_in_bytes() const { return _size; } |
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1948 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 1949 #if INCLUDE_SERVICES |
1950 void collect_statistics(KlassSizeStats *sz) const; | |
1951 #endif | |
0 | 1952 |
1953 int creation_mileage() const { return _creation_mileage; } | |
1954 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 1955 |
1956 int invocation_count() { | |
1957 if (invocation_counter()->carry()) { | |
1958 return InvocationCounter::count_limit; | |
1959 } | |
1960 return invocation_counter()->count(); | |
1961 } | |
1962 int backedge_count() { | |
1963 if (backedge_counter()->carry()) { | |
1964 return InvocationCounter::count_limit; | |
1965 } | |
1966 return backedge_counter()->count(); | |
1967 } | |
1968 | |
2252 | 1969 int invocation_count_start() { |
1970 if (invocation_counter()->carry()) { | |
1971 return 0; | |
1972 } | |
1973 return _invocation_counter_start; | |
1974 } | |
1975 | |
1976 int backedge_count_start() { | |
1977 if (backedge_counter()->carry()) { | |
1978 return 0; | |
1979 } | |
1980 return _backedge_counter_start; | |
1981 } | |
1982 | |
1983 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
1984 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
1985 | |
1986 void reset_start_counters() { | |
1987 _invocation_counter_start = invocation_count(); | |
1988 _backedge_counter_start = backedge_count(); | |
1989 } | |
1990 | |
1783 | 1991 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
1992 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
1993 | |
1994 void set_would_profile(bool p) { _would_profile = p; } | |
1995 bool would_profile() const { return _would_profile; } | |
1996 | |
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1997 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 1998 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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1999 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2000 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2001 | |
2002 int num_loops() const { return _num_loops; } | |
2003 void set_num_loops(int n) { _num_loops = n; } | |
2004 int num_blocks() const { return _num_blocks; } | |
2005 void set_num_blocks(int n) { _num_blocks = n; } | |
2006 | |
0 | 2007 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2008 static int mileage_of(Method* m); |
0 | 2009 |
2010 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2011 enum EscapeFlag { | |
2012 estimated = 1 << 0, | |
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2013 return_local = 1 << 1, |
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2014 return_allocated = 1 << 2, |
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2015 allocated_escapes = 1 << 3, |
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2016 unknown_modified = 1 << 4 |
0 | 2017 }; |
2018 | |
2019 intx eflags() { return _eflags; } | |
2020 intx arg_local() { return _arg_local; } | |
2021 intx arg_stack() { return _arg_stack; } | |
2022 intx arg_returned() { return _arg_returned; } | |
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2023 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2024 assert(aid != NULL, "arg_info must be not null"); |
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2025 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2026 return aid->arg_modified(a); } |
0 | 2027 |
2028 void set_eflags(intx v) { _eflags = v; } | |
2029 void set_arg_local(intx v) { _arg_local = v; } | |
2030 void set_arg_stack(intx v) { _arg_stack = v; } | |
2031 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2032 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2033 assert(aid != NULL, "arg_info must be not null"); |
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2034 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2035 aid->set_arg_modified(a, v); } |
0 | 2036 |
2037 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2038 | |
2039 // Location and size of data area | |
2040 address data_base() const { | |
2041 return (address) _data; | |
2042 } | |
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2043 int data_size() const { |
0 | 2044 return _data_size; |
2045 } | |
2046 | |
2047 // Accessors | |
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2048 Method* method() const { return _method; } |
0 | 2049 |
2050 // Get the data at an arbitrary (sort of) data index. | |
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2051 ProfileData* data_at(int data_index) const; |
0 | 2052 |
2053 // Walk through the data in order. | |
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2054 ProfileData* first_data() const { return data_at(first_di()); } |
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2055 ProfileData* next_data(ProfileData* current) const; |
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2056 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2057 |
2058 // Convert a dp (data pointer) to a di (data index). | |
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2059 int dp_to_di(address dp) const { |
0 | 2060 return dp - ((address)_data); |
2061 } | |
2062 | |
2063 address di_to_dp(int di) { | |
2064 return (address)data_layout_at(di); | |
2065 } | |
2066 | |
2067 // bci to di/dp conversion. | |
2068 address bci_to_dp(int bci); | |
2069 int bci_to_di(int bci) { | |
2070 return dp_to_di(bci_to_dp(bci)); | |
2071 } | |
2072 | |
2073 // Get the data at an arbitrary bci, or NULL if there is none. | |
2074 ProfileData* bci_to_data(int bci); | |
2075 | |
2076 // Same, but try to create an extra_data record if one is needed: | |
2077 ProfileData* allocate_bci_to_data(int bci) { | |
2078 ProfileData* data = bci_to_data(bci); | |
2079 return (data != NULL) ? data : bci_to_extra_data(bci, true); | |
2080 } | |
2081 | |
2082 // Add a handful of extra data records, for trap tracking. | |
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2083 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2084 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2085 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2086 - (address)extra_data_base(); } |
2087 static DataLayout* next_extra(DataLayout* dp) { return (DataLayout*)((address)dp + in_bytes(DataLayout::cell_offset(0))); } | |
2088 | |
2089 // Return (uint)-1 for overflow. | |
2090 uint trap_count(int reason) const { | |
2091 assert((uint)reason < _trap_hist_limit, "oob"); | |
2092 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2093 } | |
2094 // For loops: | |
2095 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2096 static uint trap_count_limit() { return _trap_hist_mask; } | |
2097 uint inc_trap_count(int reason) { | |
2098 // Count another trap, anywhere in this method. | |
2099 assert(reason >= 0, "must be single trap"); | |
2100 if ((uint)reason < _trap_hist_limit) { | |
2101 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2102 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2103 _trap_hist._array[reason] = cnt1; | |
2104 return cnt1; | |
2105 } else { | |
2106 return _trap_hist_mask + (++_nof_overflow_traps); | |
2107 } | |
2108 } else { | |
2109 // Could not represent the count in the histogram. | |
2110 return (++_nof_overflow_traps); | |
2111 } | |
2112 } | |
2113 | |
2114 uint overflow_trap_count() const { | |
2115 return _nof_overflow_traps; | |
2116 } | |
2117 uint overflow_recompile_count() const { | |
2118 return _nof_overflow_recompiles; | |
2119 } | |
2120 void inc_overflow_recompile_count() { | |
2121 _nof_overflow_recompiles += 1; | |
2122 } | |
2123 uint decompile_count() const { | |
2124 return _nof_decompiles; | |
2125 } | |
2126 void inc_decompile_count() { | |
2127 _nof_decompiles += 1; | |
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2128 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2129 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2130 } |
0 | 2131 } |
2132 | |
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2133 // Return pointer to area dedicated to parameters in MDO |
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2134 ParametersTypeData* parameters_type_data() const { |
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2135 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2136 } |
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2137 |
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2138 int parameters_type_data_di() const { |
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2139 assert(_parameters_type_data_di != -1, "no args type data"); |
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2140 return _parameters_type_data_di; |
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2141 } |
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2142 |
0 | 2143 // Support for code generation |
2144 static ByteSize data_offset() { | |
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2145 return byte_offset_of(MethodData, _data[0]); |
0 | 2146 } |
2147 | |
1783 | 2148 static ByteSize invocation_counter_offset() { |
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2149 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2150 } |
2151 static ByteSize backedge_counter_offset() { | |
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2152 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2153 } |
2154 | |
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2155 static ByteSize parameters_type_data_di_offset() { |
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2156 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2157 } |
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2158 |
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2159 // Deallocation support - no pointer fields to deallocate |
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2160 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2161 |
0 | 2162 // GC support |
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2163 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2164 |
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2165 // Printing |
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2166 #ifndef PRODUCT |
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2167 void print_on (outputStream* st) const; |
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2168 #endif |
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2169 void print_value_on(outputStream* st) const; |
0 | 2170 |
2171 #ifndef PRODUCT | |
2172 // printing support for method data | |
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2173 void print_data_on(outputStream* st) const; |
0 | 2174 #endif |
2175 | |
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2176 const char* internal_name() const { return "{method data}"; } |
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2177 |
0 | 2178 // verification |
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2179 void verify_on(outputStream* st); |
0 | 2180 void verify_data_on(outputStream* st); |
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2181 |
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2182 static bool profile_parameters_for_method(methodHandle m); |
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2183 static bool profile_arguments(); |
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2184 static bool profile_return(); |
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2185 static bool profile_parameters(); |
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2186 static bool profile_return_jsr292_only(); |
0 | 2187 }; |
1972 | 2188 |
2189 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |