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annotate src/share/vm/oops/methodData.hpp @ 14517:3812c088b945
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author | lana |
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date | Thu, 06 Mar 2014 10:37:26 -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, |
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124 speculative_trap_data_tag |
0 | 125 }; |
126 | |
127 enum { | |
128 // The _struct._flags word is formatted as [trap_state:4 | flags:4]. | |
129 // The trap state breaks down further as [recompile:1 | reason:3]. | |
130 // This further breakdown is defined in deoptimization.cpp. | |
131 // See Deoptimization::trap_state_reason for an assert that | |
132 // trap_bits is big enough to hold reasons < Reason_RECORDED_LIMIT. | |
133 // | |
134 // The trap_state is collected only if ProfileTraps is true. | |
135 trap_bits = 1+3, // 3: enough to distinguish [0..Reason_RECORDED_LIMIT]. | |
136 trap_shift = BitsPerByte - trap_bits, | |
137 trap_mask = right_n_bits(trap_bits), | |
138 trap_mask_in_place = (trap_mask << trap_shift), | |
139 flag_limit = trap_shift, | |
140 flag_mask = right_n_bits(flag_limit), | |
141 first_flag = 0 | |
142 }; | |
143 | |
144 // Size computation | |
145 static int header_size_in_bytes() { | |
146 return cell_size; | |
147 } | |
148 static int header_size_in_cells() { | |
149 return 1; | |
150 } | |
151 | |
152 static int compute_size_in_bytes(int cell_count) { | |
153 return header_size_in_bytes() + cell_count * cell_size; | |
154 } | |
155 | |
156 // Initialization | |
157 void initialize(u1 tag, u2 bci, int cell_count); | |
158 | |
159 // Accessors | |
160 u1 tag() { | |
161 return _header._struct._tag; | |
162 } | |
163 | |
164 // Return a few bits of trap state. Range is [0..trap_mask]. | |
165 // The state tells if traps with zero, one, or many reasons have occurred. | |
166 // It also tells whether zero or many recompilations have occurred. | |
167 // The associated trap histogram in the MDO itself tells whether | |
168 // traps are common or not. If a BCI shows that a trap X has | |
169 // occurred, and the MDO shows N occurrences of X, we make the | |
170 // simplifying assumption that all N occurrences can be blamed | |
171 // on that BCI. | |
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172 int trap_state() const { |
0 | 173 return ((_header._struct._flags >> trap_shift) & trap_mask); |
174 } | |
175 | |
176 void set_trap_state(int new_state) { | |
177 assert(ProfileTraps, "used only under +ProfileTraps"); | |
178 uint old_flags = (_header._struct._flags & flag_mask); | |
179 _header._struct._flags = (new_state << trap_shift) | old_flags; | |
180 } | |
181 | |
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182 u1 flags() const { |
0 | 183 return _header._struct._flags; |
184 } | |
185 | |
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186 u2 bci() const { |
0 | 187 return _header._struct._bci; |
188 } | |
189 | |
190 void set_header(intptr_t value) { | |
191 _header._bits = value; | |
192 } | |
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193 bool atomic_set_header(intptr_t value) { |
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194 if (Atomic::cmpxchg_ptr(value, (volatile intptr_t*)&_header._bits, 0) == 0) { |
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195 return true; |
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196 } |
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197 return false; |
0 | 198 } |
199 intptr_t header() { | |
200 return _header._bits; | |
201 } | |
202 void set_cell_at(int index, intptr_t value) { | |
203 _cells[index] = value; | |
204 } | |
205 void release_set_cell_at(int index, intptr_t value) { | |
206 OrderAccess::release_store_ptr(&_cells[index], value); | |
207 } | |
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208 intptr_t cell_at(int index) const { |
0 | 209 return _cells[index]; |
210 } | |
211 | |
212 void set_flag_at(int flag_number) { | |
213 assert(flag_number < flag_limit, "oob"); | |
214 _header._struct._flags |= (0x1 << flag_number); | |
215 } | |
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216 bool flag_at(int flag_number) const { |
0 | 217 assert(flag_number < flag_limit, "oob"); |
218 return (_header._struct._flags & (0x1 << flag_number)) != 0; | |
219 } | |
220 | |
221 // Low-level support for code generation. | |
222 static ByteSize header_offset() { | |
223 return byte_offset_of(DataLayout, _header); | |
224 } | |
225 static ByteSize tag_offset() { | |
226 return byte_offset_of(DataLayout, _header._struct._tag); | |
227 } | |
228 static ByteSize flags_offset() { | |
229 return byte_offset_of(DataLayout, _header._struct._flags); | |
230 } | |
231 static ByteSize bci_offset() { | |
232 return byte_offset_of(DataLayout, _header._struct._bci); | |
233 } | |
234 static ByteSize cell_offset(int index) { | |
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235 return byte_offset_of(DataLayout, _cells) + in_ByteSize(index * cell_size); |
0 | 236 } |
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237 #ifdef CC_INTERP |
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238 static int cell_offset_in_bytes(int index) { |
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239 return (int)offset_of(DataLayout, _cells[index]); |
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240 } |
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241 #endif // CC_INTERP |
0 | 242 // Return a value which, when or-ed as a byte into _flags, sets the flag. |
243 static int flag_number_to_byte_constant(int flag_number) { | |
244 assert(0 <= flag_number && flag_number < flag_limit, "oob"); | |
245 DataLayout temp; temp.set_header(0); | |
246 temp.set_flag_at(flag_number); | |
247 return temp._header._struct._flags; | |
248 } | |
249 // Return a value which, when or-ed as a word into _header, sets the flag. | |
250 static intptr_t flag_mask_to_header_mask(int byte_constant) { | |
251 DataLayout temp; temp.set_header(0); | |
252 temp._header._struct._flags = byte_constant; | |
253 return temp._header._bits; | |
254 } | |
941 | 255 |
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256 ProfileData* data_in(); |
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257 |
941 | 258 // GC support |
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259 void clean_weak_klass_links(BoolObjectClosure* cl); |
0 | 260 }; |
261 | |
262 | |
263 // ProfileData class hierarchy | |
264 class ProfileData; | |
265 class BitData; | |
266 class CounterData; | |
267 class ReceiverTypeData; | |
268 class VirtualCallData; | |
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269 class VirtualCallTypeData; |
0 | 270 class RetData; |
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271 class CallTypeData; |
0 | 272 class JumpData; |
273 class BranchData; | |
274 class ArrayData; | |
275 class MultiBranchData; | |
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276 class ArgInfoData; |
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277 class ParametersTypeData; |
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278 class SpeculativeTrapData; |
0 | 279 |
280 // ProfileData | |
281 // | |
282 // A ProfileData object is created to refer to a section of profiling | |
283 // data in a structured way. | |
284 class ProfileData : public ResourceObj { | |
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285 friend class TypeEntries; |
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286 friend class ReturnTypeEntry; |
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287 friend class TypeStackSlotEntries; |
0 | 288 private: |
289 #ifndef PRODUCT | |
290 enum { | |
291 tab_width_one = 16, | |
292 tab_width_two = 36 | |
293 }; | |
294 #endif // !PRODUCT | |
295 | |
296 // This is a pointer to a section of profiling data. | |
297 DataLayout* _data; | |
298 | |
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299 char* print_data_on_helper(const MethodData* md) const; |
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300 |
0 | 301 protected: |
302 DataLayout* data() { return _data; } | |
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303 const DataLayout* data() const { return _data; } |
0 | 304 |
305 enum { | |
306 cell_size = DataLayout::cell_size | |
307 }; | |
308 | |
309 public: | |
310 // How many cells are in this? | |
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311 virtual int cell_count() const { |
0 | 312 ShouldNotReachHere(); |
313 return -1; | |
314 } | |
315 | |
316 // Return the size of this data. | |
317 int size_in_bytes() { | |
318 return DataLayout::compute_size_in_bytes(cell_count()); | |
319 } | |
320 | |
321 protected: | |
322 // Low-level accessors for underlying data | |
323 void set_intptr_at(int index, intptr_t value) { | |
324 assert(0 <= index && index < cell_count(), "oob"); | |
325 data()->set_cell_at(index, value); | |
326 } | |
327 void release_set_intptr_at(int index, intptr_t value) { | |
328 assert(0 <= index && index < cell_count(), "oob"); | |
329 data()->release_set_cell_at(index, value); | |
330 } | |
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331 intptr_t intptr_at(int index) const { |
0 | 332 assert(0 <= index && index < cell_count(), "oob"); |
333 return data()->cell_at(index); | |
334 } | |
335 void set_uint_at(int index, uint value) { | |
336 set_intptr_at(index, (intptr_t) value); | |
337 } | |
338 void release_set_uint_at(int index, uint value) { | |
339 release_set_intptr_at(index, (intptr_t) value); | |
340 } | |
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341 uint uint_at(int index) const { |
0 | 342 return (uint)intptr_at(index); |
343 } | |
344 void set_int_at(int index, int value) { | |
345 set_intptr_at(index, (intptr_t) value); | |
346 } | |
347 void release_set_int_at(int index, int value) { | |
348 release_set_intptr_at(index, (intptr_t) value); | |
349 } | |
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350 int int_at(int index) const { |
0 | 351 return (int)intptr_at(index); |
352 } | |
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353 int int_at_unchecked(int index) const { |
0 | 354 return (int)data()->cell_at(index); |
355 } | |
356 void set_oop_at(int index, oop value) { | |
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357 set_intptr_at(index, cast_from_oop<intptr_t>(value)); |
0 | 358 } |
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359 oop oop_at(int index) const { |
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360 return cast_to_oop(intptr_at(index)); |
0 | 361 } |
362 | |
363 void set_flag_at(int flag_number) { | |
364 data()->set_flag_at(flag_number); | |
365 } | |
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366 bool flag_at(int flag_number) const { |
0 | 367 return data()->flag_at(flag_number); |
368 } | |
369 | |
370 // two convenient imports for use by subclasses: | |
371 static ByteSize cell_offset(int index) { | |
372 return DataLayout::cell_offset(index); | |
373 } | |
374 static int flag_number_to_byte_constant(int flag_number) { | |
375 return DataLayout::flag_number_to_byte_constant(flag_number); | |
376 } | |
377 | |
378 ProfileData(DataLayout* data) { | |
379 _data = data; | |
380 } | |
381 | |
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382 #ifdef CC_INTERP |
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383 // Static low level accessors for DataLayout with ProfileData's semantics. |
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384 |
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385 static int cell_offset_in_bytes(int index) { |
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386 return DataLayout::cell_offset_in_bytes(index); |
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387 } |
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388 |
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389 static void increment_uint_at_no_overflow(DataLayout* layout, int index, |
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390 int inc = DataLayout::counter_increment) { |
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391 uint count = ((uint)layout->cell_at(index)) + inc; |
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392 if (count == 0) return; |
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393 layout->set_cell_at(index, (intptr_t) count); |
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394 } |
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395 |
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396 static int int_at(DataLayout* layout, int index) { |
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397 return (int)layout->cell_at(index); |
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398 } |
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399 |
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400 static int uint_at(DataLayout* layout, int index) { |
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401 return (uint)layout->cell_at(index); |
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402 } |
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403 |
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404 static oop oop_at(DataLayout* layout, int index) { |
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405 return cast_to_oop(layout->cell_at(index)); |
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406 } |
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407 |
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408 static void set_intptr_at(DataLayout* layout, int index, intptr_t value) { |
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409 layout->set_cell_at(index, (intptr_t) value); |
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410 } |
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411 |
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412 static void set_flag_at(DataLayout* layout, int flag_number) { |
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413 layout->set_flag_at(flag_number); |
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414 } |
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415 #endif // CC_INTERP |
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416 |
0 | 417 public: |
418 // Constructor for invalid ProfileData. | |
419 ProfileData(); | |
420 | |
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421 u2 bci() const { |
0 | 422 return data()->bci(); |
423 } | |
424 | |
425 address dp() { | |
426 return (address)_data; | |
427 } | |
428 | |
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429 int trap_state() const { |
0 | 430 return data()->trap_state(); |
431 } | |
432 void set_trap_state(int new_state) { | |
433 data()->set_trap_state(new_state); | |
434 } | |
435 | |
436 // Type checking | |
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437 virtual bool is_BitData() const { return false; } |
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438 virtual bool is_CounterData() const { return false; } |
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439 virtual bool is_JumpData() const { return false; } |
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440 virtual bool is_ReceiverTypeData()const { return false; } |
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441 virtual bool is_VirtualCallData() const { return false; } |
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442 virtual bool is_RetData() const { return false; } |
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443 virtual bool is_BranchData() const { return false; } |
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444 virtual bool is_ArrayData() const { return false; } |
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445 virtual bool is_MultiBranchData() const { return false; } |
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446 virtual bool is_ArgInfoData() const { return false; } |
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447 virtual bool is_CallTypeData() const { return false; } |
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448 virtual bool is_VirtualCallTypeData()const { return false; } |
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449 virtual bool is_ParametersTypeData() const { return false; } |
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450 virtual bool is_SpeculativeTrapData()const { return false; } |
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451 |
0 | 452 |
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453 BitData* as_BitData() const { |
0 | 454 assert(is_BitData(), "wrong type"); |
455 return is_BitData() ? (BitData*) this : NULL; | |
456 } | |
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457 CounterData* as_CounterData() const { |
0 | 458 assert(is_CounterData(), "wrong type"); |
459 return is_CounterData() ? (CounterData*) this : NULL; | |
460 } | |
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461 JumpData* as_JumpData() const { |
0 | 462 assert(is_JumpData(), "wrong type"); |
463 return is_JumpData() ? (JumpData*) this : NULL; | |
464 } | |
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465 ReceiverTypeData* as_ReceiverTypeData() const { |
0 | 466 assert(is_ReceiverTypeData(), "wrong type"); |
467 return is_ReceiverTypeData() ? (ReceiverTypeData*)this : NULL; | |
468 } | |
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469 VirtualCallData* as_VirtualCallData() const { |
0 | 470 assert(is_VirtualCallData(), "wrong type"); |
471 return is_VirtualCallData() ? (VirtualCallData*)this : NULL; | |
472 } | |
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473 RetData* as_RetData() const { |
0 | 474 assert(is_RetData(), "wrong type"); |
475 return is_RetData() ? (RetData*) this : NULL; | |
476 } | |
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477 BranchData* as_BranchData() const { |
0 | 478 assert(is_BranchData(), "wrong type"); |
479 return is_BranchData() ? (BranchData*) this : NULL; | |
480 } | |
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481 ArrayData* as_ArrayData() const { |
0 | 482 assert(is_ArrayData(), "wrong type"); |
483 return is_ArrayData() ? (ArrayData*) this : NULL; | |
484 } | |
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485 MultiBranchData* as_MultiBranchData() const { |
0 | 486 assert(is_MultiBranchData(), "wrong type"); |
487 return is_MultiBranchData() ? (MultiBranchData*)this : NULL; | |
488 } | |
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489 ArgInfoData* as_ArgInfoData() const { |
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490 assert(is_ArgInfoData(), "wrong type"); |
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491 return is_ArgInfoData() ? (ArgInfoData*)this : NULL; |
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492 } |
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493 CallTypeData* as_CallTypeData() const { |
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494 assert(is_CallTypeData(), "wrong type"); |
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495 return is_CallTypeData() ? (CallTypeData*)this : NULL; |
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496 } |
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497 VirtualCallTypeData* as_VirtualCallTypeData() const { |
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498 assert(is_VirtualCallTypeData(), "wrong type"); |
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499 return is_VirtualCallTypeData() ? (VirtualCallTypeData*)this : NULL; |
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500 } |
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501 ParametersTypeData* as_ParametersTypeData() const { |
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502 assert(is_ParametersTypeData(), "wrong type"); |
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503 return is_ParametersTypeData() ? (ParametersTypeData*)this : NULL; |
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504 } |
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505 SpeculativeTrapData* as_SpeculativeTrapData() const { |
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506 assert(is_SpeculativeTrapData(), "wrong type"); |
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507 return is_SpeculativeTrapData() ? (SpeculativeTrapData*)this : NULL; |
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508 } |
0 | 509 |
510 | |
511 // Subclass specific initialization | |
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512 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo) {} |
0 | 513 |
514 // GC support | |
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515 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) {} |
0 | 516 |
517 // CI translation: ProfileData can represent both MethodDataOop data | |
518 // as well as CIMethodData data. This function is provided for translating | |
519 // an oop in a ProfileData to the ci equivalent. Generally speaking, | |
520 // most ProfileData don't require any translation, so we provide the null | |
521 // translation here, and the required translators are in the ci subclasses. | |
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522 virtual void translate_from(const ProfileData* data) {} |
0 | 523 |
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524 virtual void print_data_on(outputStream* st, const char* extra = NULL) const { |
0 | 525 ShouldNotReachHere(); |
526 } | |
527 | |
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528 void print_data_on(outputStream* st, const MethodData* md) const; |
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529 |
0 | 530 #ifndef PRODUCT |
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531 void print_shared(outputStream* st, const char* name, const char* extra) const; |
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532 void tab(outputStream* st, bool first = false) const; |
0 | 533 #endif |
534 }; | |
535 | |
536 // BitData | |
537 // | |
538 // A BitData holds a flag or two in its header. | |
539 class BitData : public ProfileData { | |
540 protected: | |
541 enum { | |
542 // null_seen: | |
543 // saw a null operand (cast/aastore/instanceof) | |
544 null_seen_flag = DataLayout::first_flag + 0 | |
545 }; | |
546 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
547 public: | |
548 BitData(DataLayout* layout) : ProfileData(layout) { | |
549 } | |
550 | |
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551 virtual bool is_BitData() const { return true; } |
0 | 552 |
553 static int static_cell_count() { | |
554 return bit_cell_count; | |
555 } | |
556 | |
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557 virtual int cell_count() const { |
0 | 558 return static_cell_count(); |
559 } | |
560 | |
561 // Accessor | |
562 | |
563 // The null_seen flag bit is specially known to the interpreter. | |
564 // Consulting it allows the compiler to avoid setting up null_check traps. | |
565 bool null_seen() { return flag_at(null_seen_flag); } | |
566 void set_null_seen() { set_flag_at(null_seen_flag); } | |
567 | |
568 | |
569 // Code generation support | |
570 static int null_seen_byte_constant() { | |
571 return flag_number_to_byte_constant(null_seen_flag); | |
572 } | |
573 | |
574 static ByteSize bit_data_size() { | |
575 return cell_offset(bit_cell_count); | |
576 } | |
577 | |
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578 #ifdef CC_INTERP |
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579 static int bit_data_size_in_bytes() { |
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580 return cell_offset_in_bytes(bit_cell_count); |
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581 } |
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582 |
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583 static void set_null_seen(DataLayout* layout) { |
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584 set_flag_at(layout, null_seen_flag); |
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585 } |
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586 |
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587 static DataLayout* advance(DataLayout* layout) { |
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588 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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589 } |
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590 #endif // CC_INTERP |
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591 |
0 | 592 #ifndef PRODUCT |
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593 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 594 #endif |
595 }; | |
596 | |
597 // CounterData | |
598 // | |
599 // A CounterData corresponds to a simple counter. | |
600 class CounterData : public BitData { | |
601 protected: | |
602 enum { | |
603 count_off, | |
604 counter_cell_count | |
605 }; | |
606 public: | |
607 CounterData(DataLayout* layout) : BitData(layout) {} | |
608 | |
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609 virtual bool is_CounterData() const { return true; } |
0 | 610 |
611 static int static_cell_count() { | |
612 return counter_cell_count; | |
613 } | |
614 | |
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615 virtual int cell_count() const { |
0 | 616 return static_cell_count(); |
617 } | |
618 | |
619 // Direct accessor | |
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620 uint count() const { |
0 | 621 return uint_at(count_off); |
622 } | |
623 | |
624 // Code generation support | |
625 static ByteSize count_offset() { | |
626 return cell_offset(count_off); | |
627 } | |
628 static ByteSize counter_data_size() { | |
629 return cell_offset(counter_cell_count); | |
630 } | |
631 | |
1251
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632 void set_count(uint count) { |
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633 set_uint_at(count_off, count); |
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634 } |
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635 |
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636 #ifdef CC_INTERP |
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637 static int counter_data_size_in_bytes() { |
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638 return cell_offset_in_bytes(counter_cell_count); |
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639 } |
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640 |
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641 static void increment_count_no_overflow(DataLayout* layout) { |
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642 increment_uint_at_no_overflow(layout, count_off); |
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643 } |
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644 |
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645 // Support counter decrementation at checkcast / subtype check failed. |
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646 static void decrement_count(DataLayout* layout) { |
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647 increment_uint_at_no_overflow(layout, count_off, -1); |
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648 } |
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649 |
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650 static DataLayout* advance(DataLayout* layout) { |
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651 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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652 } |
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653 #endif // CC_INTERP |
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654 |
0 | 655 #ifndef PRODUCT |
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656 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 657 #endif |
658 }; | |
659 | |
660 // JumpData | |
661 // | |
662 // A JumpData is used to access profiling information for a direct | |
663 // branch. It is a counter, used for counting the number of branches, | |
664 // plus a data displacement, used for realigning the data pointer to | |
665 // the corresponding target bci. | |
666 class JumpData : public ProfileData { | |
667 protected: | |
668 enum { | |
669 taken_off_set, | |
670 displacement_off_set, | |
671 jump_cell_count | |
672 }; | |
673 | |
674 void set_displacement(int displacement) { | |
675 set_int_at(displacement_off_set, displacement); | |
676 } | |
677 | |
678 public: | |
679 JumpData(DataLayout* layout) : ProfileData(layout) { | |
680 assert(layout->tag() == DataLayout::jump_data_tag || | |
681 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
682 } | |
683 | |
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684 virtual bool is_JumpData() const { return true; } |
0 | 685 |
686 static int static_cell_count() { | |
687 return jump_cell_count; | |
688 } | |
689 | |
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690 virtual int cell_count() const { |
0 | 691 return static_cell_count(); |
692 } | |
693 | |
694 // Direct accessor | |
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695 uint taken() const { |
0 | 696 return uint_at(taken_off_set); |
697 } | |
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698 |
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699 void set_taken(uint cnt) { |
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700 set_uint_at(taken_off_set, cnt); |
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701 } |
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702 |
0 | 703 // Saturating counter |
704 uint inc_taken() { | |
705 uint cnt = taken() + 1; | |
706 // Did we wrap? Will compiler screw us?? | |
707 if (cnt == 0) cnt--; | |
708 set_uint_at(taken_off_set, cnt); | |
709 return cnt; | |
710 } | |
711 | |
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712 int displacement() const { |
0 | 713 return int_at(displacement_off_set); |
714 } | |
715 | |
716 // Code generation support | |
717 static ByteSize taken_offset() { | |
718 return cell_offset(taken_off_set); | |
719 } | |
720 | |
721 static ByteSize displacement_offset() { | |
722 return cell_offset(displacement_off_set); | |
723 } | |
724 | |
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725 #ifdef CC_INTERP |
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726 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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727 increment_uint_at_no_overflow(layout, taken_off_set); |
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728 } |
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729 |
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730 static DataLayout* advance_taken(DataLayout* layout) { |
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731 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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732 } |
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733 |
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734 static uint taken_count(DataLayout* layout) { |
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735 return (uint) uint_at(layout, taken_off_set); |
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736 } |
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737 #endif // CC_INTERP |
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738 |
0 | 739 // Specific initialization. |
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740 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 741 |
742 #ifndef PRODUCT | |
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743 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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744 #endif |
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745 }; |
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746 |
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747 // Entries in a ProfileData object to record types: it can either be |
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748 // none (no profile), unknown (conflicting profile data) or a klass if |
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749 // a single one is seen. Whether a null reference was seen is also |
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750 // recorded. No counter is associated with the type and a single type |
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751 // is tracked (unlike VirtualCallData). |
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752 class TypeEntries { |
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753 |
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754 public: |
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755 |
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756 // A single cell is used to record information for a type: |
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757 // - the cell is initialized to 0 |
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758 // - when a type is discovered it is stored in the cell |
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759 // - bit zero of the cell is used to record whether a null reference |
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760 // was encountered or not |
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761 // - bit 1 is set to record a conflict in the type information |
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762 |
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763 enum { |
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764 null_seen = 1, |
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765 type_mask = ~null_seen, |
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766 type_unknown = 2, |
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767 status_bits = null_seen | type_unknown, |
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768 type_klass_mask = ~status_bits |
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769 }; |
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770 |
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771 // what to initialize a cell to |
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772 static intptr_t type_none() { |
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773 return 0; |
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774 } |
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775 |
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776 // null seen = bit 0 set? |
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777 static bool was_null_seen(intptr_t v) { |
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778 return (v & null_seen) != 0; |
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779 } |
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780 |
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781 // conflicting type information = bit 1 set? |
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782 static bool is_type_unknown(intptr_t v) { |
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783 return (v & type_unknown) != 0; |
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784 } |
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785 |
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786 // not type information yet = all bits cleared, ignoring bit 0? |
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787 static bool is_type_none(intptr_t v) { |
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788 return (v & type_mask) == 0; |
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789 } |
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790 |
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791 // recorded type: cell without bit 0 and 1 |
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792 static intptr_t klass_part(intptr_t v) { |
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793 intptr_t r = v & type_klass_mask; |
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794 return r; |
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795 } |
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796 |
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797 // type recorded |
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798 static Klass* valid_klass(intptr_t k) { |
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799 if (!is_type_none(k) && |
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800 !is_type_unknown(k)) { |
13080 | 801 Klass* res = (Klass*)klass_part(k); |
802 assert(res != NULL, "invalid"); | |
803 return res; | |
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804 } else { |
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805 return NULL; |
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806 } |
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807 } |
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808 |
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809 static intptr_t with_status(intptr_t k, intptr_t in) { |
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810 return k | (in & status_bits); |
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811 } |
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812 |
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813 static intptr_t with_status(Klass* k, intptr_t in) { |
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814 return with_status((intptr_t)k, in); |
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815 } |
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816 |
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817 #ifndef PRODUCT |
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818 static void print_klass(outputStream* st, intptr_t k); |
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819 #endif |
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820 |
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821 // GC support |
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822 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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|
823 |
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|
824 protected: |
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825 // ProfileData object these entries are part of |
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826 ProfileData* _pd; |
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827 // offset within the ProfileData object where the entries start |
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828 const int _base_off; |
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|
829 |
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830 TypeEntries(int base_off) |
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831 : _base_off(base_off), _pd(NULL) {} |
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|
832 |
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833 void set_intptr_at(int index, intptr_t value) { |
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834 _pd->set_intptr_at(index, value); |
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|
835 } |
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|
836 |
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837 intptr_t intptr_at(int index) const { |
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838 return _pd->intptr_at(index); |
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|
839 } |
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|
840 |
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841 public: |
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842 void set_profile_data(ProfileData* pd) { |
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843 _pd = pd; |
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844 } |
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|
845 }; |
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846 |
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847 // Type entries used for arguments passed at a call and parameters on |
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848 // method entry. 2 cells per entry: one for the type encoded as in |
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849 // TypeEntries and one initialized with the stack slot where the |
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850 // profiled object is to be found so that the interpreter can locate |
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851 // it quickly. |
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852 class TypeStackSlotEntries : public TypeEntries { |
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853 |
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854 private: |
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|
855 enum { |
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|
856 stack_slot_entry, |
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857 type_entry, |
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858 per_arg_cell_count |
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859 }; |
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|
860 |
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861 // offset of cell for stack slot for entry i within ProfileData object |
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862 int stack_slot_offset(int i) const { |
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863 return _base_off + stack_slot_local_offset(i); |
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|
864 } |
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|
865 |
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|
866 protected: |
12882
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867 const int _number_of_entries; |
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868 |
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869 // offset of cell for type for entry i within ProfileData object |
12882
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870 int type_offset(int i) const { |
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871 return _base_off + type_local_offset(i); |
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|
872 } |
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|
873 |
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|
874 public: |
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|
875 |
12882
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876 TypeStackSlotEntries(int base_off, int nb_entries) |
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877 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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878 |
12962
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|
879 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
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880 |
12962
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881 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
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882 |
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883 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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884 static int stack_slot_local_offset(int i) { |
12882
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885 return i * per_arg_cell_count + stack_slot_entry; |
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|
886 } |
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|
887 |
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888 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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889 static int type_local_offset(int i) { |
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890 return i * per_arg_cell_count + type_entry; |
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891 } |
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|
892 |
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893 // stack slot for entry i |
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|
894 uint stack_slot(int i) const { |
12882
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|
895 assert(i >= 0 && i < _number_of_entries, "oob"); |
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896 return _pd->uint_at(stack_slot_offset(i)); |
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897 } |
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|
898 |
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|
899 // set stack slot for entry i |
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900 void set_stack_slot(int i, uint num) { |
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901 assert(i >= 0 && i < _number_of_entries, "oob"); |
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902 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
903 } |
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|
904 |
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|
905 // type for entry i |
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|
906 intptr_t type(int i) const { |
12882
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907 assert(i >= 0 && i < _number_of_entries, "oob"); |
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908 return _pd->intptr_at(type_offset(i)); |
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|
909 } |
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|
910 |
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|
911 // set type for entry i |
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|
912 void set_type(int i, intptr_t k) { |
12882
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913 assert(i >= 0 && i < _number_of_entries, "oob"); |
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914 _pd->set_intptr_at(type_offset(i), k); |
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915 } |
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|
916 |
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|
917 static ByteSize per_arg_size() { |
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918 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
919 } |
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|
920 |
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|
921 static int per_arg_count() { |
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|
922 return per_arg_cell_count ; |
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|
923 } |
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|
924 |
12882
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|
925 // GC support |
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926 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
927 |
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|
928 #ifndef PRODUCT |
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929 void print_data_on(outputStream* st) const; |
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930 #endif |
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|
931 }; |
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|
932 |
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933 // Type entry used for return from a call. A single cell to record the |
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934 // type. |
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|
935 class ReturnTypeEntry : public TypeEntries { |
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|
936 |
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|
937 private: |
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|
938 enum { |
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|
939 cell_count = 1 |
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|
940 }; |
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|
941 |
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|
942 public: |
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|
943 ReturnTypeEntry(int base_off) |
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|
944 : TypeEntries(base_off) {} |
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|
945 |
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|
946 void post_initialize() { |
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|
947 set_type(type_none()); |
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|
948 } |
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|
949 |
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|
950 intptr_t type() const { |
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951 return _pd->intptr_at(_base_off); |
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|
952 } |
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|
953 |
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|
954 void set_type(intptr_t k) { |
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|
955 _pd->set_intptr_at(_base_off, k); |
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|
956 } |
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957 |
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958 static int static_cell_count() { |
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959 return cell_count; |
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960 } |
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961 |
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962 static ByteSize size() { |
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963 return in_ByteSize(cell_count * DataLayout::cell_size); |
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964 } |
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965 |
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966 ByteSize type_offset() { |
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967 return DataLayout::cell_offset(_base_off); |
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968 } |
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969 |
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970 // GC support |
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971 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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972 |
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973 #ifndef PRODUCT |
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974 void print_data_on(outputStream* st) const; |
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975 #endif |
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976 }; |
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977 |
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978 // Entries to collect type information at a call: contains arguments |
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979 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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980 // number of cells. Because the number of cells for the return type is |
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981 // smaller than the number of cells for the type of an arguments, the |
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982 // number of cells is used to tell how many arguments are profiled and |
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983 // whether a return value is profiled. See has_arguments() and |
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984 // has_return(). |
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985 class TypeEntriesAtCall { |
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986 private: |
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987 static int stack_slot_local_offset(int i) { |
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988 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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989 } |
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990 |
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991 static int argument_type_local_offset(int i) { |
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992 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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993 } |
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994 |
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995 public: |
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996 |
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997 static int header_cell_count() { |
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998 return 1; |
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999 } |
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1000 |
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1001 static int cell_count_local_offset() { |
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1002 return 0; |
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1003 } |
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1004 |
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1005 static int compute_cell_count(BytecodeStream* stream); |
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1006 |
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1007 static void initialize(DataLayout* dl, int base, int cell_count) { |
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1008 int off = base + cell_count_local_offset(); |
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1009 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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1010 } |
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1011 |
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1012 static bool arguments_profiling_enabled(); |
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1013 static bool return_profiling_enabled(); |
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1014 |
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1015 // Code generation support |
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1016 static ByteSize cell_count_offset() { |
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1017 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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1018 } |
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1019 |
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1020 static ByteSize args_data_offset() { |
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1021 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1022 } |
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1023 |
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1024 static ByteSize stack_slot_offset(int i) { |
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1025 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1026 } |
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1027 |
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1028 static ByteSize argument_type_offset(int i) { |
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1029 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1030 } |
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1031 }; |
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1032 |
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1033 // CallTypeData |
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1034 // |
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1035 // A CallTypeData is used to access profiling information about a non |
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1036 // virtual call for which we collect type information about arguments |
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1037 // and return value. |
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1038 class CallTypeData : public CounterData { |
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1039 private: |
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1040 // entries for arguments if any |
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1041 TypeStackSlotEntries _args; |
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1042 // entry for return type if any |
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1043 ReturnTypeEntry _ret; |
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1044 |
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1045 int cell_count_global_offset() const { |
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1046 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1047 } |
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1048 |
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1049 // number of cells not counting the header |
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1050 int cell_count_no_header() const { |
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1051 return uint_at(cell_count_global_offset()); |
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1052 } |
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1053 |
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1054 void check_number_of_arguments(int total) { |
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1055 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1056 } |
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1057 |
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1058 public: |
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1059 CallTypeData(DataLayout* layout) : |
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1060 CounterData(layout), |
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1061 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1062 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1063 { |
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1064 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1065 // Some compilers (VC++) don't want this passed in member initialization list |
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1066 _args.set_profile_data(this); |
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1067 _ret.set_profile_data(this); |
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1068 } |
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1069 |
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1070 const TypeStackSlotEntries* args() const { |
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1071 assert(has_arguments(), "no profiling of arguments"); |
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1072 return &_args; |
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1073 } |
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1074 |
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1075 const ReturnTypeEntry* ret() const { |
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1076 assert(has_return(), "no profiling of return value"); |
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1077 return &_ret; |
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1078 } |
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1079 |
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1080 virtual bool is_CallTypeData() const { return true; } |
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1081 |
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1082 static int static_cell_count() { |
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1083 return -1; |
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1084 } |
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1085 |
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1086 static int compute_cell_count(BytecodeStream* stream) { |
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1087 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1088 } |
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1089 |
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1090 static void initialize(DataLayout* dl, int cell_count) { |
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1091 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1092 } |
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1093 |
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1094 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1095 |
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1096 virtual int cell_count() const { |
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1097 return CounterData::static_cell_count() + |
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1098 TypeEntriesAtCall::header_cell_count() + |
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1099 int_at_unchecked(cell_count_global_offset()); |
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1100 } |
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1101 |
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1102 int number_of_arguments() const { |
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1103 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1104 } |
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1105 |
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1106 void set_argument_type(int i, Klass* k) { |
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1107 assert(has_arguments(), "no arguments!"); |
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1108 intptr_t current = _args.type(i); |
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1109 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1110 } |
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1111 |
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1112 void set_return_type(Klass* k) { |
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1113 assert(has_return(), "no return!"); |
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1114 intptr_t current = _ret.type(); |
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1115 _ret.set_type(TypeEntries::with_status(k, current)); |
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1116 } |
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1117 |
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1118 // An entry for a return value takes less space than an entry for an |
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1119 // argument so if the number of cells exceeds the number of cells |
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1120 // needed for an argument, this object contains type information for |
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1121 // at least one argument. |
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1122 bool has_arguments() const { |
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1123 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1124 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1125 return res; |
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1126 } |
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1127 |
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1128 // An entry for a return value takes less space than an entry for an |
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1129 // argument, so if the remainder of the number of cells divided by |
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1130 // the number of cells for an argument is not null, a return value |
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1131 // is profiled in this object. |
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1132 bool has_return() const { |
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1133 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1134 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1135 return res; |
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1136 } |
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1137 |
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1138 // Code generation support |
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1139 static ByteSize args_data_offset() { |
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1140 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1141 } |
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1142 |
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1143 // GC support |
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1144 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1145 if (has_arguments()) { |
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1146 _args.clean_weak_klass_links(is_alive_closure); |
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1147 } |
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1148 if (has_return()) { |
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1149 _ret.clean_weak_klass_links(is_alive_closure); |
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1150 } |
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1151 } |
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1152 |
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1153 #ifndef PRODUCT |
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1154 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1155 #endif |
1156 }; | |
1157 | |
1158 // ReceiverTypeData | |
1159 // | |
1160 // A ReceiverTypeData is used to access profiling information about a | |
1161 // dynamic type check. It consists of a counter which counts the total times | |
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1162 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1163 // which are used to store a type profile for the receiver of the check. |
1164 class ReceiverTypeData : public CounterData { | |
1165 protected: | |
1166 enum { | |
1167 receiver0_offset = counter_cell_count, | |
1168 count0_offset, | |
1169 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1170 }; | |
1171 | |
1172 public: | |
1173 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1174 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1175 layout->tag() == DataLayout::virtual_call_data_tag || |
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1176 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1177 } |
1178 | |
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1179 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1180 |
1181 static int static_cell_count() { | |
1182 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count; | |
1183 } | |
1184 | |
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1185 virtual int cell_count() const { |
0 | 1186 return static_cell_count(); |
1187 } | |
1188 | |
1189 // Direct accessors | |
1190 static uint row_limit() { | |
1191 return TypeProfileWidth; | |
1192 } | |
1193 static int receiver_cell_index(uint row) { | |
1194 return receiver0_offset + row * receiver_type_row_cell_count; | |
1195 } | |
1196 static int receiver_count_cell_index(uint row) { | |
1197 return count0_offset + row * receiver_type_row_cell_count; | |
1198 } | |
1199 | |
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1200 Klass* receiver(uint row) const { |
0 | 1201 assert(row < row_limit(), "oob"); |
1202 | |
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1203 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1204 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1205 return recv; |
1206 } | |
1207 | |
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1208 void set_receiver(uint row, Klass* k) { |
941 | 1209 assert((uint)row < row_limit(), "oob"); |
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1210 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1211 } |
1212 | |
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1213 uint receiver_count(uint row) const { |
0 | 1214 assert(row < row_limit(), "oob"); |
1215 return uint_at(receiver_count_cell_index(row)); | |
1216 } | |
1217 | |
941 | 1218 void set_receiver_count(uint row, uint count) { |
1219 assert(row < row_limit(), "oob"); | |
1220 set_uint_at(receiver_count_cell_index(row), count); | |
1221 } | |
1222 | |
1223 void clear_row(uint row) { | |
1224 assert(row < row_limit(), "oob"); | |
1251
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1225 // Clear total count - indicator of polymorphic call site. |
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1226 // The site may look like as monomorphic after that but |
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1227 // it allow to have more accurate profiling information because |
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1228 // there was execution phase change since klasses were unloaded. |
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1229 // If the site is still polymorphic then MDO will be updated |
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1230 // to reflect it. But it could be the case that the site becomes |
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1231 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1232 // Even if we use monomorphic (when it is not) for compilation |
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1233 // we will only have trap, deoptimization and recompile again |
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1234 // with updated MDO after executing method in Interpreter. |
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1235 // An additional receiver will be recorded in the cleaned row |
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1236 // during next call execution. |
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1237 // |
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1238 // Note: our profiling logic works with empty rows in any slot. |
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1239 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1240 // |
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1241 set_count(0); |
941 | 1242 set_receiver(row, NULL); |
1243 set_receiver_count(row, 0); | |
1244 } | |
1245 | |
0 | 1246 // Code generation support |
1247 static ByteSize receiver_offset(uint row) { | |
1248 return cell_offset(receiver_cell_index(row)); | |
1249 } | |
1250 static ByteSize receiver_count_offset(uint row) { | |
1251 return cell_offset(receiver_count_cell_index(row)); | |
1252 } | |
1253 static ByteSize receiver_type_data_size() { | |
1254 return cell_offset(static_cell_count()); | |
1255 } | |
1256 | |
1257 // GC support | |
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1258 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1259 |
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1260 #ifdef CC_INTERP |
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1261 static int receiver_type_data_size_in_bytes() { |
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1262 return cell_offset_in_bytes(static_cell_count()); |
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1263 } |
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1264 |
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1265 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
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1266 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1267 return recv; |
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1268 } |
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1269 |
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1270 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1271 const int num_rows = row_limit(); |
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1272 // Receiver already exists? |
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1273 for (int row = 0; row < num_rows; row++) { |
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1274 if (receiver_unchecked(layout, row) == rcvr) { |
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1275 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1276 return; |
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1277 } |
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1278 } |
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1279 // New receiver, find a free slot. |
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1280 for (int row = 0; row < num_rows; row++) { |
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1281 if (receiver_unchecked(layout, row) == NULL) { |
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1282 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1283 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1284 return; |
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1285 } |
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1286 } |
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1287 // Receiver did not match any saved receiver and there is no empty row for it. |
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1288 // Increment total counter to indicate polymorphic case. |
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1289 increment_count_no_overflow(layout); |
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1290 } |
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1291 |
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1292 static DataLayout* advance(DataLayout* layout) { |
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1293 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
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1294 } |
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1295 #endif // CC_INTERP |
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1296 |
0 | 1297 #ifndef PRODUCT |
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1298 void print_receiver_data_on(outputStream* st) const; |
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1299 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1300 #endif |
1301 }; | |
1302 | |
1303 // VirtualCallData | |
1304 // | |
1305 // A VirtualCallData is used to access profiling information about a | |
1306 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1307 class VirtualCallData : public ReceiverTypeData { | |
1308 public: | |
1309 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1310 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1311 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1312 } |
1313 | |
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1314 virtual bool is_VirtualCallData() const { return true; } |
0 | 1315 |
1316 static int static_cell_count() { | |
1317 // At this point we could add more profile state, e.g., for arguments. | |
1318 // But for now it's the same size as the base record type. | |
1319 return ReceiverTypeData::static_cell_count(); | |
1320 } | |
1321 | |
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1322 virtual int cell_count() const { |
0 | 1323 return static_cell_count(); |
1324 } | |
1325 | |
1326 // Direct accessors | |
1327 static ByteSize virtual_call_data_size() { | |
1328 return cell_offset(static_cell_count()); | |
1329 } | |
1330 | |
14420
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1331 #ifdef CC_INTERP |
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1332 static int virtual_call_data_size_in_bytes() { |
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1333 return cell_offset_in_bytes(static_cell_count()); |
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1334 } |
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1335 |
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1336 static DataLayout* advance(DataLayout* layout) { |
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1337 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1338 } |
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1339 #endif // CC_INTERP |
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1340 |
0 | 1341 #ifndef PRODUCT |
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1342 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1343 #endif |
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1344 }; |
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1345 |
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1346 // VirtualCallTypeData |
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1347 // |
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1348 // A VirtualCallTypeData is used to access profiling information about |
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1349 // a virtual call for which we collect type information about |
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1350 // arguments and return value. |
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1351 class VirtualCallTypeData : public VirtualCallData { |
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1352 private: |
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1353 // entries for arguments if any |
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1354 TypeStackSlotEntries _args; |
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1355 // entry for return type if any |
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1356 ReturnTypeEntry _ret; |
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1357 |
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1358 int cell_count_global_offset() const { |
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1359 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1360 } |
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1361 |
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1362 // number of cells not counting the header |
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1363 int cell_count_no_header() const { |
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1364 return uint_at(cell_count_global_offset()); |
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1365 } |
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1366 |
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1367 void check_number_of_arguments(int total) { |
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1368 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1369 } |
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1370 |
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1371 public: |
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1372 VirtualCallTypeData(DataLayout* layout) : |
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1373 VirtualCallData(layout), |
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1374 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1375 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1376 { |
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1377 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
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1378 // Some compilers (VC++) don't want this passed in member initialization list |
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1379 _args.set_profile_data(this); |
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1380 _ret.set_profile_data(this); |
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1381 } |
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1382 |
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1383 const TypeStackSlotEntries* args() const { |
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1384 assert(has_arguments(), "no profiling of arguments"); |
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1385 return &_args; |
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1386 } |
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1387 |
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1388 const ReturnTypeEntry* ret() const { |
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1389 assert(has_return(), "no profiling of return value"); |
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1390 return &_ret; |
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1391 } |
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1392 |
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1393 virtual bool is_VirtualCallTypeData() const { return true; } |
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1394 |
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1395 static int static_cell_count() { |
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1396 return -1; |
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1397 } |
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1398 |
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1399 static int compute_cell_count(BytecodeStream* stream) { |
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1400 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1401 } |
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1402 |
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1403 static void initialize(DataLayout* dl, int cell_count) { |
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1404 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
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1405 } |
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1406 |
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1407 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1408 |
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1409 virtual int cell_count() const { |
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1410 return VirtualCallData::static_cell_count() + |
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1411 TypeEntriesAtCall::header_cell_count() + |
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1412 int_at_unchecked(cell_count_global_offset()); |
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1413 } |
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1414 |
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1415 int number_of_arguments() const { |
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1416 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1417 } |
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1418 |
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1419 void set_argument_type(int i, Klass* k) { |
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1420 assert(has_arguments(), "no arguments!"); |
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1421 intptr_t current = _args.type(i); |
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1422 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1423 } |
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1424 |
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1425 void set_return_type(Klass* k) { |
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1426 assert(has_return(), "no return!"); |
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1427 intptr_t current = _ret.type(); |
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1428 _ret.set_type(TypeEntries::with_status(k, current)); |
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1429 } |
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1430 |
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1431 // An entry for a return value takes less space than an entry for an |
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1432 // argument, so if the remainder of the number of cells divided by |
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1433 // the number of cells for an argument is not null, a return value |
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1434 // is profiled in this object. |
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1435 bool has_return() const { |
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1436 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1437 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1438 return res; |
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1439 } |
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1440 |
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1441 // An entry for a return value takes less space than an entry for an |
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1442 // argument so if the number of cells exceeds the number of cells |
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1443 // needed for an argument, this object contains type information for |
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1444 // at least one argument. |
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1445 bool has_arguments() const { |
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1446 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1447 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1448 return res; |
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1449 } |
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1450 |
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1451 // Code generation support |
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1452 static ByteSize args_data_offset() { |
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1453 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1454 } |
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1455 |
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1456 // GC support |
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1457 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1458 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1459 if (has_arguments()) { |
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1460 _args.clean_weak_klass_links(is_alive_closure); |
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1461 } |
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1462 if (has_return()) { |
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1463 _ret.clean_weak_klass_links(is_alive_closure); |
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1464 } |
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1465 } |
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1466 |
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1467 #ifndef PRODUCT |
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1468 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1469 #endif |
1470 }; | |
1471 | |
1472 // RetData | |
1473 // | |
1474 // A RetData is used to access profiling information for a ret bytecode. | |
1475 // It is composed of a count of the number of times that the ret has | |
1476 // been executed, followed by a series of triples of the form | |
1477 // (bci, count, di) which count the number of times that some bci was the | |
1478 // target of the ret and cache a corresponding data displacement. | |
1479 class RetData : public CounterData { | |
1480 protected: | |
1481 enum { | |
1482 bci0_offset = counter_cell_count, | |
1483 count0_offset, | |
1484 displacement0_offset, | |
1485 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1486 }; | |
1487 | |
1488 void set_bci(uint row, int bci) { | |
1489 assert((uint)row < row_limit(), "oob"); | |
1490 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1491 } | |
1492 void release_set_bci(uint row, int bci) { | |
1493 assert((uint)row < row_limit(), "oob"); | |
1494 // 'release' when setting the bci acts as a valid flag for other | |
1495 // threads wrt bci_count and bci_displacement. | |
1496 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1497 } | |
1498 void set_bci_count(uint row, uint count) { | |
1499 assert((uint)row < row_limit(), "oob"); | |
1500 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1501 } | |
1502 void set_bci_displacement(uint row, int disp) { | |
1503 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1504 } | |
1505 | |
1506 public: | |
1507 RetData(DataLayout* layout) : CounterData(layout) { | |
1508 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1509 } | |
1510 | |
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1511 virtual bool is_RetData() const { return true; } |
0 | 1512 |
1513 enum { | |
1514 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1515 }; | |
1516 | |
1517 static int static_cell_count() { | |
1518 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1519 } | |
1520 | |
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1521 virtual int cell_count() const { |
0 | 1522 return static_cell_count(); |
1523 } | |
1524 | |
1525 static uint row_limit() { | |
1526 return BciProfileWidth; | |
1527 } | |
1528 static int bci_cell_index(uint row) { | |
1529 return bci0_offset + row * ret_row_cell_count; | |
1530 } | |
1531 static int bci_count_cell_index(uint row) { | |
1532 return count0_offset + row * ret_row_cell_count; | |
1533 } | |
1534 static int bci_displacement_cell_index(uint row) { | |
1535 return displacement0_offset + row * ret_row_cell_count; | |
1536 } | |
1537 | |
1538 // Direct accessors | |
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1539 int bci(uint row) const { |
0 | 1540 return int_at(bci_cell_index(row)); |
1541 } | |
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1542 uint bci_count(uint row) const { |
0 | 1543 return uint_at(bci_count_cell_index(row)); |
1544 } | |
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1545 int bci_displacement(uint row) const { |
0 | 1546 return int_at(bci_displacement_cell_index(row)); |
1547 } | |
1548 | |
1549 // Interpreter Runtime support | |
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1550 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1551 |
1552 // Code generation support | |
1553 static ByteSize bci_offset(uint row) { | |
1554 return cell_offset(bci_cell_index(row)); | |
1555 } | |
1556 static ByteSize bci_count_offset(uint row) { | |
1557 return cell_offset(bci_count_cell_index(row)); | |
1558 } | |
1559 static ByteSize bci_displacement_offset(uint row) { | |
1560 return cell_offset(bci_displacement_cell_index(row)); | |
1561 } | |
1562 | |
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1563 #ifdef CC_INTERP |
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1564 static DataLayout* advance(MethodData *md, int bci); |
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1565 #endif // CC_INTERP |
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1566 |
0 | 1567 // Specific initialization. |
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1568 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1569 |
1570 #ifndef PRODUCT | |
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1571 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1572 #endif |
1573 }; | |
1574 | |
1575 // BranchData | |
1576 // | |
1577 // A BranchData is used to access profiling data for a two-way branch. | |
1578 // It consists of taken and not_taken counts as well as a data displacement | |
1579 // for the taken case. | |
1580 class BranchData : public JumpData { | |
1581 protected: | |
1582 enum { | |
1583 not_taken_off_set = jump_cell_count, | |
1584 branch_cell_count | |
1585 }; | |
1586 | |
1587 void set_displacement(int displacement) { | |
1588 set_int_at(displacement_off_set, displacement); | |
1589 } | |
1590 | |
1591 public: | |
1592 BranchData(DataLayout* layout) : JumpData(layout) { | |
1593 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1594 } | |
1595 | |
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1596 virtual bool is_BranchData() const { return true; } |
0 | 1597 |
1598 static int static_cell_count() { | |
1599 return branch_cell_count; | |
1600 } | |
1601 | |
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1602 virtual int cell_count() const { |
0 | 1603 return static_cell_count(); |
1604 } | |
1605 | |
1606 // Direct accessor | |
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1607 uint not_taken() const { |
0 | 1608 return uint_at(not_taken_off_set); |
1609 } | |
1610 | |
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1611 void set_not_taken(uint cnt) { |
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1612 set_uint_at(not_taken_off_set, cnt); |
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1613 } |
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1614 |
0 | 1615 uint inc_not_taken() { |
1616 uint cnt = not_taken() + 1; | |
1617 // Did we wrap? Will compiler screw us?? | |
1618 if (cnt == 0) cnt--; | |
1619 set_uint_at(not_taken_off_set, cnt); | |
1620 return cnt; | |
1621 } | |
1622 | |
1623 // Code generation support | |
1624 static ByteSize not_taken_offset() { | |
1625 return cell_offset(not_taken_off_set); | |
1626 } | |
1627 static ByteSize branch_data_size() { | |
1628 return cell_offset(branch_cell_count); | |
1629 } | |
1630 | |
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1631 #ifdef CC_INTERP |
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1632 static int branch_data_size_in_bytes() { |
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1633 return cell_offset_in_bytes(branch_cell_count); |
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1634 } |
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1635 |
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1636 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
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1637 increment_uint_at_no_overflow(layout, not_taken_off_set); |
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1638 } |
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1639 |
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1640 static DataLayout* advance_not_taken(DataLayout* layout) { |
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1641 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
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1642 } |
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1643 #endif // CC_INTERP |
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1644 |
0 | 1645 // Specific initialization. |
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1646 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1647 |
1648 #ifndef PRODUCT | |
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1649 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1650 #endif |
1651 }; | |
1652 | |
1653 // ArrayData | |
1654 // | |
1655 // A ArrayData is a base class for accessing profiling data which does | |
1656 // not have a statically known size. It consists of an array length | |
1657 // and an array start. | |
1658 class ArrayData : public ProfileData { | |
1659 protected: | |
1660 friend class DataLayout; | |
1661 | |
1662 enum { | |
1663 array_len_off_set, | |
1664 array_start_off_set | |
1665 }; | |
1666 | |
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1667 uint array_uint_at(int index) const { |
0 | 1668 int aindex = index + array_start_off_set; |
1669 return uint_at(aindex); | |
1670 } | |
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1671 int array_int_at(int index) const { |
0 | 1672 int aindex = index + array_start_off_set; |
1673 return int_at(aindex); | |
1674 } | |
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1675 oop array_oop_at(int index) const { |
0 | 1676 int aindex = index + array_start_off_set; |
1677 return oop_at(aindex); | |
1678 } | |
1679 void array_set_int_at(int index, int value) { | |
1680 int aindex = index + array_start_off_set; | |
1681 set_int_at(aindex, value); | |
1682 } | |
1683 | |
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1684 #ifdef CC_INTERP |
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1685 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1686 |
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1687 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
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1688 int aindex = index + array_start_off_set; |
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1689 increment_uint_at_no_overflow(layout, aindex); |
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1690 } |
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1691 |
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1692 static int array_int_at(DataLayout* layout, int index) { |
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1693 int aindex = index + array_start_off_set; |
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1694 return int_at(layout, aindex); |
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1695 } |
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1696 #endif // CC_INTERP |
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1697 |
0 | 1698 // Code generation support for subclasses. |
1699 static ByteSize array_element_offset(int index) { | |
1700 return cell_offset(array_start_off_set + index); | |
1701 } | |
1702 | |
1703 public: | |
1704 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1705 | |
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1706 virtual bool is_ArrayData() const { return true; } |
0 | 1707 |
1708 static int static_cell_count() { | |
1709 return -1; | |
1710 } | |
1711 | |
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1712 int array_len() const { |
0 | 1713 return int_at_unchecked(array_len_off_set); |
1714 } | |
1715 | |
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1716 virtual int cell_count() const { |
0 | 1717 return array_len() + 1; |
1718 } | |
1719 | |
1720 // Code generation support | |
1721 static ByteSize array_len_offset() { | |
1722 return cell_offset(array_len_off_set); | |
1723 } | |
1724 static ByteSize array_start_offset() { | |
1725 return cell_offset(array_start_off_set); | |
1726 } | |
1727 }; | |
1728 | |
1729 // MultiBranchData | |
1730 // | |
1731 // A MultiBranchData is used to access profiling information for | |
1732 // a multi-way branch (*switch bytecodes). It consists of a series | |
1733 // of (count, displacement) pairs, which count the number of times each | |
1734 // case was taken and specify the data displacment for each branch target. | |
1735 class MultiBranchData : public ArrayData { | |
1736 protected: | |
1737 enum { | |
1738 default_count_off_set, | |
1739 default_disaplacement_off_set, | |
1740 case_array_start | |
1741 }; | |
1742 enum { | |
1743 relative_count_off_set, | |
1744 relative_displacement_off_set, | |
1745 per_case_cell_count | |
1746 }; | |
1747 | |
1748 void set_default_displacement(int displacement) { | |
1749 array_set_int_at(default_disaplacement_off_set, displacement); | |
1750 } | |
1751 void set_displacement_at(int index, int displacement) { | |
1752 array_set_int_at(case_array_start + | |
1753 index * per_case_cell_count + | |
1754 relative_displacement_off_set, | |
1755 displacement); | |
1756 } | |
1757 | |
1758 public: | |
1759 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1760 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1761 } | |
1762 | |
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1763 virtual bool is_MultiBranchData() const { return true; } |
0 | 1764 |
1765 static int compute_cell_count(BytecodeStream* stream); | |
1766 | |
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1767 int number_of_cases() const { |
0 | 1768 int alen = array_len() - 2; // get rid of default case here. |
1769 assert(alen % per_case_cell_count == 0, "must be even"); | |
1770 return (alen / per_case_cell_count); | |
1771 } | |
1772 | |
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1773 uint default_count() const { |
0 | 1774 return array_uint_at(default_count_off_set); |
1775 } | |
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1776 int default_displacement() const { |
0 | 1777 return array_int_at(default_disaplacement_off_set); |
1778 } | |
1779 | |
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1780 uint count_at(int index) const { |
0 | 1781 return array_uint_at(case_array_start + |
1782 index * per_case_cell_count + | |
1783 relative_count_off_set); | |
1784 } | |
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1785 int displacement_at(int index) const { |
0 | 1786 return array_int_at(case_array_start + |
1787 index * per_case_cell_count + | |
1788 relative_displacement_off_set); | |
1789 } | |
1790 | |
1791 // Code generation support | |
1792 static ByteSize default_count_offset() { | |
1793 return array_element_offset(default_count_off_set); | |
1794 } | |
1795 static ByteSize default_displacement_offset() { | |
1796 return array_element_offset(default_disaplacement_off_set); | |
1797 } | |
1798 static ByteSize case_count_offset(int index) { | |
1799 return case_array_offset() + | |
1800 (per_case_size() * index) + | |
1801 relative_count_offset(); | |
1802 } | |
1803 static ByteSize case_array_offset() { | |
1804 return array_element_offset(case_array_start); | |
1805 } | |
1806 static ByteSize per_case_size() { | |
1807 return in_ByteSize(per_case_cell_count) * cell_size; | |
1808 } | |
1809 static ByteSize relative_count_offset() { | |
1810 return in_ByteSize(relative_count_off_set) * cell_size; | |
1811 } | |
1812 static ByteSize relative_displacement_offset() { | |
1813 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1814 } | |
1815 | |
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1816 #ifdef CC_INTERP |
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1817 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1818 if (index == -1) { |
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1819 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1820 } else { |
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1821 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1822 index * per_case_cell_count + |
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1823 relative_count_off_set); |
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1824 } |
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1825 } |
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1826 |
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1827 static DataLayout* advance(DataLayout* layout, int index) { |
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1828 if (index == -1) { |
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1829 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1830 } else { |
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1831 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1832 index * per_case_cell_count + |
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1833 relative_displacement_off_set)); |
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1834 } |
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1835 } |
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1836 #endif // CC_INTERP |
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1837 |
0 | 1838 // Specific initialization. |
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1839 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1840 |
1841 #ifndef PRODUCT | |
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1842 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1843 #endif |
1844 }; | |
1845 | |
45
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1846 class ArgInfoData : public ArrayData { |
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1847 |
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1848 public: |
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1849 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1850 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1851 } |
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1852 |
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1853 virtual bool is_ArgInfoData() const { return true; } |
45
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1854 |
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1855 |
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1856 int number_of_args() const { |
45
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1857 return array_len(); |
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1858 } |
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1859 |
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1860 uint arg_modified(int arg) const { |
45
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1861 return array_uint_at(arg); |
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1862 } |
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1863 |
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1864 void set_arg_modified(int arg, uint val) { |
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1865 array_set_int_at(arg, val); |
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1866 } |
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1867 |
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1868 #ifndef PRODUCT |
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1869 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1870 #endif |
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1871 }; |
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1872 |
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1873 // ParametersTypeData |
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1874 // |
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1875 // A ParametersTypeData is used to access profiling information about |
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1876 // types of parameters to a method |
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1877 class ParametersTypeData : public ArrayData { |
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1878 |
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1879 private: |
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1880 TypeStackSlotEntries _parameters; |
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1881 |
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1882 static int stack_slot_local_offset(int i) { |
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1883 assert_profiling_enabled(); |
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1884 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1885 } |
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1886 |
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1887 static int type_local_offset(int i) { |
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1888 assert_profiling_enabled(); |
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1889 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1890 } |
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1891 |
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1892 static bool profiling_enabled(); |
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1893 static void assert_profiling_enabled() { |
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1894 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1895 } |
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1896 |
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1897 public: |
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1898 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1899 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1900 // Some compilers (VC++) don't want this passed in member initialization list |
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1901 _parameters.set_profile_data(this); |
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1902 } |
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1903 |
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1904 static int compute_cell_count(Method* m); |
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1905 |
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1906 virtual bool is_ParametersTypeData() const { return true; } |
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1907 |
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1908 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1909 |
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1910 int number_of_parameters() const { |
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1911 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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1912 } |
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1913 |
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1914 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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1915 |
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1916 uint stack_slot(int i) const { |
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1917 return _parameters.stack_slot(i); |
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1918 } |
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1919 |
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1920 void set_type(int i, Klass* k) { |
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1921 intptr_t current = _parameters.type(i); |
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1922 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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1923 } |
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1924 |
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1925 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1926 _parameters.clean_weak_klass_links(is_alive_closure); |
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1927 } |
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1928 |
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1929 #ifndef PRODUCT |
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1930 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1931 #endif |
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1932 |
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1933 static ByteSize stack_slot_offset(int i) { |
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1934 return cell_offset(stack_slot_local_offset(i)); |
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1935 } |
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1936 |
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1937 static ByteSize type_offset(int i) { |
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1938 return cell_offset(type_local_offset(i)); |
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1939 } |
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1940 }; |
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1941 |
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1942 // SpeculativeTrapData |
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1943 // |
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1944 // A SpeculativeTrapData is used to record traps due to type |
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1945 // speculation. It records the root of the compilation: that type |
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1946 // speculation is wrong in the context of one compilation (for |
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1947 // method1) doesn't mean it's wrong in the context of another one (for |
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1948 // method2). Type speculation could have more/different data in the |
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1949 // context of the compilation of method2 and it's worthwhile to try an |
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1950 // optimization that failed for compilation of method1 in the context |
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1951 // of compilation of method2. |
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1952 // Space for SpeculativeTrapData entries is allocated from the extra |
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1953 // data space in the MDO. If we run out of space, the trap data for |
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1954 // the ProfileData at that bci is updated. |
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1955 class SpeculativeTrapData : public ProfileData { |
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1956 protected: |
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1957 enum { |
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1958 method_offset, |
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1959 speculative_trap_cell_count |
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1960 }; |
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1961 public: |
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1962 SpeculativeTrapData(DataLayout* layout) : ProfileData(layout) { |
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1963 assert(layout->tag() == DataLayout::speculative_trap_data_tag, "wrong type"); |
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1964 } |
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1965 |
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1966 virtual bool is_SpeculativeTrapData() const { return true; } |
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1967 |
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1968 static int static_cell_count() { |
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1969 return speculative_trap_cell_count; |
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1970 } |
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1971 |
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1972 virtual int cell_count() const { |
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1973 return static_cell_count(); |
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1974 } |
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1975 |
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1976 // Direct accessor |
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1977 Method* method() const { |
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1978 return (Method*)intptr_at(method_offset); |
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1979 } |
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1980 |
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1981 void set_method(Method* m) { |
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1982 set_intptr_at(method_offset, (intptr_t)m); |
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1983 } |
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1984 |
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1985 #ifndef PRODUCT |
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1986 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1987 #endif |
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1988 }; |
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1989 |
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1990 // MethodData* |
0 | 1991 // |
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1992 // A MethodData* holds information which has been collected about |
0 | 1993 // a method. Its layout looks like this: |
1994 // | |
1995 // ----------------------------- | |
1996 // | header | | |
1997 // | klass | | |
1998 // ----------------------------- | |
1999 // | method | | |
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2000 // | size of the MethodData* | |
0 | 2001 // ----------------------------- |
2002 // | Data entries... | | |
2003 // | (variable size) | | |
2004 // | | | |
2005 // . . | |
2006 // . . | |
2007 // . . | |
2008 // | | | |
2009 // ----------------------------- | |
2010 // | |
2011 // The data entry area is a heterogeneous array of DataLayouts. Each | |
2012 // DataLayout in the array corresponds to a specific bytecode in the | |
2013 // method. The entries in the array are sorted by the corresponding | |
2014 // bytecode. Access to the data is via resource-allocated ProfileData, | |
2015 // which point to the underlying blocks of DataLayout structures. | |
2016 // | |
2017 // During interpretation, if profiling in enabled, the interpreter | |
2018 // maintains a method data pointer (mdp), which points at the entry | |
2019 // in the array corresponding to the current bci. In the course of | |
2020 // intepretation, when a bytecode is encountered that has profile data | |
2021 // associated with it, the entry pointed to by mdp is updated, then the | |
2022 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
2023 // is NULL to begin with, the interpreter assumes that the current method | |
2024 // is not (yet) being profiled. | |
2025 // | |
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2026 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 2027 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
2028 // from the base of the data entry array. A "displacement" is the byte offset | |
2029 // in certain ProfileData objects that indicate the amount the mdp must be | |
2030 // adjusted in the event of a change in control flow. | |
2031 // | |
2032 | |
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2033 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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2034 |
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2035 class MethodData : public Metadata { |
0 | 2036 friend class VMStructs; |
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2037 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
0 | 2038 private: |
2039 friend class ProfileData; | |
2040 | |
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2041 // Back pointer to the Method* |
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2042 Method* _method; |
0 | 2043 |
2044 // Size of this oop in bytes | |
2045 int _size; | |
2046 | |
2047 // Cached hint for bci_to_dp and bci_to_data | |
2048 int _hint_di; | |
2049 | |
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2050 MethodData(methodHandle method, int size, TRAPS); |
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2051 public: |
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2052 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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2053 MethodData() {}; // For ciMethodData |
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2054 |
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2055 bool is_methodData() const volatile { return true; } |
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2056 |
0 | 2057 // Whole-method sticky bits and flags |
2058 enum { | |
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2059 _trap_hist_limit = 18, // decoupled from Deoptimization::Reason_LIMIT |
0 | 2060 _trap_hist_mask = max_jubyte, |
2061 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
2062 }; // Public flag values | |
2063 private: | |
2064 uint _nof_decompiles; // count of all nmethod removals | |
2065 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
2066 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
2067 union { | |
2068 intptr_t _align; | |
2069 u1 _array[_trap_hist_limit]; | |
2070 } _trap_hist; | |
2071 | |
2072 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2073 intx _eflags; // flags on escape information | |
2074 intx _arg_local; // bit set of non-escaping arguments | |
2075 intx _arg_stack; // bit set of stack-allocatable arguments | |
2076 intx _arg_returned; // bit set of returned arguments | |
2077 | |
1783 | 2078 int _creation_mileage; // method mileage at MDO creation |
2079 | |
2080 // How many invocations has this MDO seen? | |
2081 // These counters are used to determine the exact age of MDO. | |
2082 // We need those because in tiered a method can be concurrently | |
2083 // executed at different levels. | |
2084 InvocationCounter _invocation_counter; | |
2085 // Same for backedges. | |
2086 InvocationCounter _backedge_counter; | |
2252 | 2087 // Counter values at the time profiling started. |
2088 int _invocation_counter_start; | |
2089 int _backedge_counter_start; | |
1783 | 2090 // Number of loops and blocks is computed when compiling the first |
2091 // time with C1. It is used to determine if method is trivial. | |
2092 short _num_loops; | |
2093 short _num_blocks; | |
2094 // Highest compile level this method has ever seen. | |
2095 u1 _highest_comp_level; | |
2096 // Same for OSR level | |
2097 u1 _highest_osr_comp_level; | |
2098 // Does this method contain anything worth profiling? | |
2099 bool _would_profile; | |
0 | 2100 |
2101 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
2102 int _data_size; | |
2103 | |
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2104 // data index for the area dedicated to parameters. -1 if no |
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2105 // parameter profiling. |
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2106 int _parameters_type_data_di; |
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2107 |
0 | 2108 // Beginning of the data entries |
2109 intptr_t _data[1]; | |
2110 | |
2111 // Helper for size computation | |
2112 static int compute_data_size(BytecodeStream* stream); | |
2113 static int bytecode_cell_count(Bytecodes::Code code); | |
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2114 static bool is_speculative_trap_bytecode(Bytecodes::Code code); |
0 | 2115 enum { no_profile_data = -1, variable_cell_count = -2 }; |
2116 | |
2117 // Helper for initialization | |
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2118 DataLayout* data_layout_at(int data_index) const { |
0 | 2119 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
2120 return (DataLayout*) (((address)_data) + data_index); | |
2121 } | |
2122 | |
2123 // Initialize an individual data segment. Returns the size of | |
2124 // the segment in bytes. | |
2125 int initialize_data(BytecodeStream* stream, int data_index); | |
2126 | |
2127 // Helper for data_at | |
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2128 DataLayout* limit_data_position() const { |
0 | 2129 return (DataLayout*)((address)data_base() + _data_size); |
2130 } | |
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2131 bool out_of_bounds(int data_index) const { |
0 | 2132 return data_index >= data_size(); |
2133 } | |
2134 | |
2135 // Give each of the data entries a chance to perform specific | |
2136 // data initialization. | |
2137 void post_initialize(BytecodeStream* stream); | |
2138 | |
2139 // hint accessors | |
2140 int hint_di() const { return _hint_di; } | |
2141 void set_hint_di(int di) { | |
2142 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2143 _hint_di = di; | |
2144 } | |
2145 ProfileData* data_before(int bci) { | |
2146 // avoid SEGV on this edge case | |
2147 if (data_size() == 0) | |
2148 return NULL; | |
2149 int hint = hint_di(); | |
2150 if (data_layout_at(hint)->bci() <= bci) | |
2151 return data_at(hint); | |
2152 return first_data(); | |
2153 } | |
2154 | |
2155 // What is the index of the first data entry? | |
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2156 int first_di() const { return 0; } |
0 | 2157 |
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2158 ProfileData* bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp); |
0 | 2159 // Find or create an extra ProfileData: |
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2160 ProfileData* bci_to_extra_data(int bci, Method* m, bool create_if_missing); |
0 | 2161 |
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2162 // return the argument info cell |
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2163 ArgInfoData *arg_info(); |
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2164 |
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2165 enum { |
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2166 no_type_profile = 0, |
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2167 type_profile_jsr292 = 1, |
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2168 type_profile_all = 2 |
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2169 }; |
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2170 |
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2171 static bool profile_jsr292(methodHandle m, int bci); |
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2172 static int profile_arguments_flag(); |
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2173 static bool profile_arguments_jsr292_only(); |
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2174 static bool profile_all_arguments(); |
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2175 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2176 static int profile_return_flag(); |
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2177 static bool profile_all_return(); |
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2178 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2179 static int profile_parameters_flag(); |
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2180 static bool profile_parameters_jsr292_only(); |
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2181 static bool profile_all_parameters(); |
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2182 |
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2183 void clean_extra_data(BoolObjectClosure* is_alive); |
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2184 void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false); |
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2185 void verify_extra_data_clean(BoolObjectClosure* is_alive); |
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2186 |
0 | 2187 public: |
2188 static int header_size() { | |
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2189 return sizeof(MethodData)/wordSize; |
0 | 2190 } |
2191 | |
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2192 // Compute the size of a MethodData* before it is created. |
0 | 2193 static int compute_allocation_size_in_bytes(methodHandle method); |
2194 static int compute_allocation_size_in_words(methodHandle method); | |
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2195 static int compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps); |
0 | 2196 |
2197 // Determine if a given bytecode can have profile information. | |
2198 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2199 return bytecode_cell_count(code) != no_profile_data; | |
2200 } | |
2201 | |
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2202 // reset into original state |
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2203 void init(); |
0 | 2204 |
2205 // My size | |
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2206 int size_in_bytes() const { return _size; } |
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2207 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2208 #if INCLUDE_SERVICES |
2209 void collect_statistics(KlassSizeStats *sz) const; | |
2210 #endif | |
0 | 2211 |
2212 int creation_mileage() const { return _creation_mileage; } | |
2213 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2214 |
2215 int invocation_count() { | |
2216 if (invocation_counter()->carry()) { | |
2217 return InvocationCounter::count_limit; | |
2218 } | |
2219 return invocation_counter()->count(); | |
2220 } | |
2221 int backedge_count() { | |
2222 if (backedge_counter()->carry()) { | |
2223 return InvocationCounter::count_limit; | |
2224 } | |
2225 return backedge_counter()->count(); | |
2226 } | |
2227 | |
2252 | 2228 int invocation_count_start() { |
2229 if (invocation_counter()->carry()) { | |
2230 return 0; | |
2231 } | |
2232 return _invocation_counter_start; | |
2233 } | |
2234 | |
2235 int backedge_count_start() { | |
2236 if (backedge_counter()->carry()) { | |
2237 return 0; | |
2238 } | |
2239 return _backedge_counter_start; | |
2240 } | |
2241 | |
2242 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2243 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2244 | |
2245 void reset_start_counters() { | |
2246 _invocation_counter_start = invocation_count(); | |
2247 _backedge_counter_start = backedge_count(); | |
2248 } | |
2249 | |
1783 | 2250 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2251 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2252 | |
2253 void set_would_profile(bool p) { _would_profile = p; } | |
2254 bool would_profile() const { return _would_profile; } | |
2255 | |
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2256 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2257 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2258 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2259 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2260 | |
2261 int num_loops() const { return _num_loops; } | |
2262 void set_num_loops(int n) { _num_loops = n; } | |
2263 int num_blocks() const { return _num_blocks; } | |
2264 void set_num_blocks(int n) { _num_blocks = n; } | |
2265 | |
0 | 2266 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2267 static int mileage_of(Method* m); |
0 | 2268 |
2269 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2270 enum EscapeFlag { | |
2271 estimated = 1 << 0, | |
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2272 return_local = 1 << 1, |
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2273 return_allocated = 1 << 2, |
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2274 allocated_escapes = 1 << 3, |
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2275 unknown_modified = 1 << 4 |
0 | 2276 }; |
2277 | |
2278 intx eflags() { return _eflags; } | |
2279 intx arg_local() { return _arg_local; } | |
2280 intx arg_stack() { return _arg_stack; } | |
2281 intx arg_returned() { return _arg_returned; } | |
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2282 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2283 assert(aid != NULL, "arg_info must be not null"); |
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2284 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2285 return aid->arg_modified(a); } |
0 | 2286 |
2287 void set_eflags(intx v) { _eflags = v; } | |
2288 void set_arg_local(intx v) { _arg_local = v; } | |
2289 void set_arg_stack(intx v) { _arg_stack = v; } | |
2290 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2291 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2292 assert(aid != NULL, "arg_info must be not null"); |
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2293 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2294 aid->set_arg_modified(a, v); } |
0 | 2295 |
2296 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2297 | |
2298 // Location and size of data area | |
2299 address data_base() const { | |
2300 return (address) _data; | |
2301 } | |
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2302 int data_size() const { |
0 | 2303 return _data_size; |
2304 } | |
2305 | |
2306 // Accessors | |
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2307 Method* method() const { return _method; } |
0 | 2308 |
2309 // Get the data at an arbitrary (sort of) data index. | |
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2310 ProfileData* data_at(int data_index) const; |
0 | 2311 |
2312 // Walk through the data in order. | |
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2313 ProfileData* first_data() const { return data_at(first_di()); } |
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2314 ProfileData* next_data(ProfileData* current) const; |
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2315 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2316 |
2317 // Convert a dp (data pointer) to a di (data index). | |
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2318 int dp_to_di(address dp) const { |
0 | 2319 return dp - ((address)_data); |
2320 } | |
2321 | |
2322 address di_to_dp(int di) { | |
2323 return (address)data_layout_at(di); | |
2324 } | |
2325 | |
2326 // bci to di/dp conversion. | |
2327 address bci_to_dp(int bci); | |
2328 int bci_to_di(int bci) { | |
2329 return dp_to_di(bci_to_dp(bci)); | |
2330 } | |
2331 | |
2332 // Get the data at an arbitrary bci, or NULL if there is none. | |
2333 ProfileData* bci_to_data(int bci); | |
2334 | |
2335 // Same, but try to create an extra_data record if one is needed: | |
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2336 ProfileData* allocate_bci_to_data(int bci, Method* m) { |
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2337 ProfileData* data = NULL; |
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2338 // If m not NULL, try to allocate a SpeculativeTrapData entry |
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2339 if (m == NULL) { |
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2340 data = bci_to_data(bci); |
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2341 } |
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2342 if (data != NULL) { |
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2343 return data; |
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2344 } |
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2345 data = bci_to_extra_data(bci, m, true); |
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2346 if (data != NULL) { |
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2347 return data; |
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2348 } |
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2349 // If SpeculativeTrapData allocation fails try to allocate a |
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2350 // regular entry |
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2351 data = bci_to_data(bci); |
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2352 if (data != NULL) { |
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2353 return data; |
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2354 } |
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2355 return bci_to_extra_data(bci, NULL, true); |
0 | 2356 } |
2357 | |
2358 // Add a handful of extra data records, for trap tracking. | |
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2359 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2360 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2361 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2362 - (address)extra_data_base(); } |
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2363 static DataLayout* next_extra(DataLayout* dp); |
0 | 2364 |
2365 // Return (uint)-1 for overflow. | |
2366 uint trap_count(int reason) const { | |
2367 assert((uint)reason < _trap_hist_limit, "oob"); | |
2368 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; | |
2369 } | |
2370 // For loops: | |
2371 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2372 static uint trap_count_limit() { return _trap_hist_mask; } | |
2373 uint inc_trap_count(int reason) { | |
2374 // Count another trap, anywhere in this method. | |
2375 assert(reason >= 0, "must be single trap"); | |
2376 if ((uint)reason < _trap_hist_limit) { | |
2377 uint cnt1 = 1 + _trap_hist._array[reason]; | |
2378 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... | |
2379 _trap_hist._array[reason] = cnt1; | |
2380 return cnt1; | |
2381 } else { | |
2382 return _trap_hist_mask + (++_nof_overflow_traps); | |
2383 } | |
2384 } else { | |
2385 // Could not represent the count in the histogram. | |
2386 return (++_nof_overflow_traps); | |
2387 } | |
2388 } | |
2389 | |
2390 uint overflow_trap_count() const { | |
2391 return _nof_overflow_traps; | |
2392 } | |
2393 uint overflow_recompile_count() const { | |
2394 return _nof_overflow_recompiles; | |
2395 } | |
2396 void inc_overflow_recompile_count() { | |
2397 _nof_overflow_recompiles += 1; | |
2398 } | |
2399 uint decompile_count() const { | |
2400 return _nof_decompiles; | |
2401 } | |
2402 void inc_decompile_count() { | |
2403 _nof_decompiles += 1; | |
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2404 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2405 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2406 } |
0 | 2407 } |
2408 | |
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2409 // Return pointer to area dedicated to parameters in MDO |
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2410 ParametersTypeData* parameters_type_data() const { |
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2411 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2412 } |
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2413 |
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2414 int parameters_type_data_di() const { |
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2415 assert(_parameters_type_data_di != -1, "no args type data"); |
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2416 return _parameters_type_data_di; |
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2417 } |
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2418 |
0 | 2419 // Support for code generation |
2420 static ByteSize data_offset() { | |
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2421 return byte_offset_of(MethodData, _data[0]); |
0 | 2422 } |
2423 | |
1783 | 2424 static ByteSize invocation_counter_offset() { |
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2425 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2426 } |
2427 static ByteSize backedge_counter_offset() { | |
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2428 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2429 } |
2430 | |
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2431 static ByteSize parameters_type_data_di_offset() { |
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2432 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2433 } |
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2434 |
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2435 // Deallocation support - no pointer fields to deallocate |
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2436 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2437 |
0 | 2438 // GC support |
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2439 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2440 |
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2441 // Printing |
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2442 #ifndef PRODUCT |
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2443 void print_on (outputStream* st) const; |
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2444 #endif |
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2445 void print_value_on(outputStream* st) const; |
0 | 2446 |
2447 #ifndef PRODUCT | |
2448 // printing support for method data | |
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2449 void print_data_on(outputStream* st) const; |
0 | 2450 #endif |
2451 | |
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2452 const char* internal_name() const { return "{method data}"; } |
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2453 |
0 | 2454 // verification |
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2455 void verify_on(outputStream* st); |
0 | 2456 void verify_data_on(outputStream* st); |
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2457 |
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2458 static bool profile_parameters_for_method(methodHandle m); |
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2459 static bool profile_arguments(); |
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2460 static bool profile_return(); |
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2461 static bool profile_parameters(); |
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2462 static bool profile_return_jsr292_only(); |
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2463 |
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2464 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 2465 }; |
1972 | 2466 |
2467 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |