Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/methodData.hpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
author | twisti |
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date | Tue, 11 Mar 2014 18:45:59 -0700 |
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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) | |
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544 null_seen_flag = DataLayout::first_flag + 0 |
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545 #ifdef GRAAL |
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546 // bytecode threw any exception |
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547 , exception_seen_flag = null_seen_flag + 1 |
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548 #endif |
0 | 549 }; |
550 enum { bit_cell_count = 0 }; // no additional data fields needed. | |
551 public: | |
552 BitData(DataLayout* layout) : ProfileData(layout) { | |
553 } | |
554 | |
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555 virtual bool is_BitData() const { return true; } |
0 | 556 |
557 static int static_cell_count() { | |
558 return bit_cell_count; | |
559 } | |
560 | |
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561 virtual int cell_count() const { |
0 | 562 return static_cell_count(); |
563 } | |
564 | |
565 // Accessor | |
566 | |
567 // The null_seen flag bit is specially known to the interpreter. | |
568 // Consulting it allows the compiler to avoid setting up null_check traps. | |
569 bool null_seen() { return flag_at(null_seen_flag); } | |
570 void set_null_seen() { set_flag_at(null_seen_flag); } | |
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571 #ifdef GRAAL |
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572 // true if an exception was thrown at the specific BCI |
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573 bool exception_seen() { return flag_at(exception_seen_flag); } |
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574 void set_exception_seen() { set_flag_at(exception_seen_flag); } |
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575 #endif |
0 | 576 |
577 // Code generation support | |
578 static int null_seen_byte_constant() { | |
579 return flag_number_to_byte_constant(null_seen_flag); | |
580 } | |
581 | |
582 static ByteSize bit_data_size() { | |
583 return cell_offset(bit_cell_count); | |
584 } | |
585 | |
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586 #ifdef CC_INTERP |
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587 static int bit_data_size_in_bytes() { |
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588 return cell_offset_in_bytes(bit_cell_count); |
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589 } |
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590 |
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591 static void set_null_seen(DataLayout* layout) { |
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592 set_flag_at(layout, null_seen_flag); |
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593 } |
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594 |
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595 static DataLayout* advance(DataLayout* layout) { |
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596 return (DataLayout*) (((address)layout) + (ssize_t)BitData::bit_data_size_in_bytes()); |
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597 } |
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598 #endif // CC_INTERP |
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599 |
0 | 600 #ifndef PRODUCT |
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601 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 602 #endif |
603 }; | |
604 | |
605 // CounterData | |
606 // | |
607 // A CounterData corresponds to a simple counter. | |
608 class CounterData : public BitData { | |
609 protected: | |
610 enum { | |
611 count_off, | |
612 counter_cell_count | |
613 }; | |
614 public: | |
615 CounterData(DataLayout* layout) : BitData(layout) {} | |
616 | |
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617 virtual bool is_CounterData() const { return true; } |
0 | 618 |
619 static int static_cell_count() { | |
620 return counter_cell_count; | |
621 } | |
622 | |
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623 virtual int cell_count() const { |
0 | 624 return static_cell_count(); |
625 } | |
626 | |
627 // Direct accessor | |
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628 uint count() const { |
0 | 629 return uint_at(count_off); |
630 } | |
631 | |
632 // Code generation support | |
633 static ByteSize count_offset() { | |
634 return cell_offset(count_off); | |
635 } | |
636 static ByteSize counter_data_size() { | |
637 return cell_offset(counter_cell_count); | |
638 } | |
639 | |
1251
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640 void set_count(uint count) { |
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641 set_uint_at(count_off, count); |
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642 } |
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643 |
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644 #ifdef CC_INTERP |
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645 static int counter_data_size_in_bytes() { |
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646 return cell_offset_in_bytes(counter_cell_count); |
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647 } |
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648 |
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649 static void increment_count_no_overflow(DataLayout* layout) { |
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650 increment_uint_at_no_overflow(layout, count_off); |
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651 } |
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652 |
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653 // Support counter decrementation at checkcast / subtype check failed. |
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654 static void decrement_count(DataLayout* layout) { |
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655 increment_uint_at_no_overflow(layout, count_off, -1); |
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656 } |
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657 |
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658 static DataLayout* advance(DataLayout* layout) { |
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659 return (DataLayout*) (((address)layout) + (ssize_t)CounterData::counter_data_size_in_bytes()); |
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660 } |
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661 #endif // CC_INTERP |
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662 |
0 | 663 #ifndef PRODUCT |
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664 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 665 #endif |
666 }; | |
667 | |
668 // JumpData | |
669 // | |
670 // A JumpData is used to access profiling information for a direct | |
671 // branch. It is a counter, used for counting the number of branches, | |
672 // plus a data displacement, used for realigning the data pointer to | |
673 // the corresponding target bci. | |
674 class JumpData : public ProfileData { | |
675 protected: | |
676 enum { | |
677 taken_off_set, | |
678 displacement_off_set, | |
679 jump_cell_count | |
680 }; | |
681 | |
682 void set_displacement(int displacement) { | |
683 set_int_at(displacement_off_set, displacement); | |
684 } | |
685 | |
686 public: | |
687 JumpData(DataLayout* layout) : ProfileData(layout) { | |
688 assert(layout->tag() == DataLayout::jump_data_tag || | |
689 layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
690 } | |
691 | |
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692 virtual bool is_JumpData() const { return true; } |
0 | 693 |
694 static int static_cell_count() { | |
695 return jump_cell_count; | |
696 } | |
697 | |
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698 virtual int cell_count() const { |
0 | 699 return static_cell_count(); |
700 } | |
701 | |
702 // Direct accessor | |
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703 uint taken() const { |
0 | 704 return uint_at(taken_off_set); |
705 } | |
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706 |
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707 void set_taken(uint cnt) { |
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708 set_uint_at(taken_off_set, cnt); |
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709 } |
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710 |
0 | 711 // Saturating counter |
712 uint inc_taken() { | |
713 uint cnt = taken() + 1; | |
714 // Did we wrap? Will compiler screw us?? | |
715 if (cnt == 0) cnt--; | |
716 set_uint_at(taken_off_set, cnt); | |
717 return cnt; | |
718 } | |
719 | |
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720 int displacement() const { |
0 | 721 return int_at(displacement_off_set); |
722 } | |
723 | |
724 // Code generation support | |
725 static ByteSize taken_offset() { | |
726 return cell_offset(taken_off_set); | |
727 } | |
728 | |
729 static ByteSize displacement_offset() { | |
730 return cell_offset(displacement_off_set); | |
731 } | |
732 | |
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733 #ifdef CC_INTERP |
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734 static void increment_taken_count_no_overflow(DataLayout* layout) { |
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735 increment_uint_at_no_overflow(layout, taken_off_set); |
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736 } |
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737 |
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738 static DataLayout* advance_taken(DataLayout* layout) { |
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739 return (DataLayout*) (((address)layout) + (ssize_t)int_at(layout, displacement_off_set)); |
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740 } |
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741 |
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742 static uint taken_count(DataLayout* layout) { |
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743 return (uint) uint_at(layout, taken_off_set); |
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744 } |
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745 #endif // CC_INTERP |
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746 |
0 | 747 // Specific initialization. |
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748 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 749 |
750 #ifndef PRODUCT | |
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751 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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752 #endif |
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753 }; |
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754 |
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755 // Entries in a ProfileData object to record types: it can either be |
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756 // none (no profile), unknown (conflicting profile data) or a klass if |
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757 // a single one is seen. Whether a null reference was seen is also |
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758 // recorded. No counter is associated with the type and a single type |
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759 // is tracked (unlike VirtualCallData). |
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760 class TypeEntries { |
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761 |
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762 public: |
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763 |
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764 // A single cell is used to record information for a type: |
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765 // - the cell is initialized to 0 |
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766 // - when a type is discovered it is stored in the cell |
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767 // - bit zero of the cell is used to record whether a null reference |
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768 // was encountered or not |
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769 // - bit 1 is set to record a conflict in the type information |
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770 |
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771 enum { |
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772 null_seen = 1, |
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773 type_mask = ~null_seen, |
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774 type_unknown = 2, |
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775 status_bits = null_seen | type_unknown, |
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776 type_klass_mask = ~status_bits |
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777 }; |
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778 |
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779 // what to initialize a cell to |
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780 static intptr_t type_none() { |
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781 return 0; |
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782 } |
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783 |
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784 // null seen = bit 0 set? |
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785 static bool was_null_seen(intptr_t v) { |
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786 return (v & null_seen) != 0; |
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787 } |
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788 |
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789 // conflicting type information = bit 1 set? |
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790 static bool is_type_unknown(intptr_t v) { |
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791 return (v & type_unknown) != 0; |
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792 } |
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793 |
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794 // not type information yet = all bits cleared, ignoring bit 0? |
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795 static bool is_type_none(intptr_t v) { |
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796 return (v & type_mask) == 0; |
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797 } |
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798 |
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799 // recorded type: cell without bit 0 and 1 |
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800 static intptr_t klass_part(intptr_t v) { |
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801 intptr_t r = v & type_klass_mask; |
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802 return r; |
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803 } |
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804 |
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805 // type recorded |
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806 static Klass* valid_klass(intptr_t k) { |
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807 if (!is_type_none(k) && |
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808 !is_type_unknown(k)) { |
13080 | 809 Klass* res = (Klass*)klass_part(k); |
810 assert(res != NULL, "invalid"); | |
811 return res; | |
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812 } else { |
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813 return NULL; |
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|
814 } |
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|
815 } |
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|
816 |
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817 static intptr_t with_status(intptr_t k, intptr_t in) { |
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818 return k | (in & status_bits); |
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|
819 } |
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|
820 |
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|
821 static intptr_t with_status(Klass* k, intptr_t in) { |
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822 return with_status((intptr_t)k, in); |
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|
823 } |
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|
824 |
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|
825 #ifndef PRODUCT |
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826 static void print_klass(outputStream* st, intptr_t k); |
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827 #endif |
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|
828 |
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|
829 // GC support |
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830 static bool is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p); |
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|
831 |
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|
832 protected: |
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|
833 // ProfileData object these entries are part of |
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834 ProfileData* _pd; |
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835 // offset within the ProfileData object where the entries start |
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|
836 const int _base_off; |
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|
837 |
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|
838 TypeEntries(int base_off) |
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839 : _base_off(base_off), _pd(NULL) {} |
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|
840 |
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841 void set_intptr_at(int index, intptr_t value) { |
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842 _pd->set_intptr_at(index, value); |
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|
843 } |
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|
844 |
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|
845 intptr_t intptr_at(int index) const { |
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846 return _pd->intptr_at(index); |
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|
847 } |
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|
848 |
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|
849 public: |
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|
850 void set_profile_data(ProfileData* pd) { |
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|
851 _pd = pd; |
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|
852 } |
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|
853 }; |
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|
854 |
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855 // Type entries used for arguments passed at a call and parameters on |
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856 // method entry. 2 cells per entry: one for the type encoded as in |
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|
857 // TypeEntries and one initialized with the stack slot where the |
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858 // profiled object is to be found so that the interpreter can locate |
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|
859 // it quickly. |
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|
860 class TypeStackSlotEntries : public TypeEntries { |
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|
861 |
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|
862 private: |
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|
863 enum { |
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|
864 stack_slot_entry, |
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|
865 type_entry, |
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|
866 per_arg_cell_count |
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|
867 }; |
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|
868 |
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|
869 // offset of cell for stack slot for entry i within ProfileData object |
12882
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870 int stack_slot_offset(int i) const { |
12875
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871 return _base_off + stack_slot_local_offset(i); |
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|
872 } |
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|
873 |
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|
874 protected: |
12882
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|
875 const int _number_of_entries; |
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|
876 |
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|
877 // offset of cell for type for entry i within ProfileData object |
12882
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878 int type_offset(int i) const { |
12875
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|
879 return _base_off + type_local_offset(i); |
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|
880 } |
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|
881 |
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|
882 public: |
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|
883 |
12882
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|
884 TypeStackSlotEntries(int base_off, int nb_entries) |
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885 : TypeEntries(base_off), _number_of_entries(nb_entries) {} |
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|
886 |
12962
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|
887 static int compute_cell_count(Symbol* signature, bool include_receiver, int max); |
12875
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|
888 |
12962
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|
889 void post_initialize(Symbol* signature, bool has_receiver, bool include_receiver); |
12875
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|
890 |
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|
891 // offset of cell for stack slot for entry i within this block of cells for a TypeStackSlotEntries |
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|
892 static int stack_slot_local_offset(int i) { |
12882
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893 return i * per_arg_cell_count + stack_slot_entry; |
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|
894 } |
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|
895 |
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|
896 // offset of cell for type for entry i within this block of cells for a TypeStackSlotEntries |
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|
897 static int type_local_offset(int i) { |
12882
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898 return i * per_arg_cell_count + type_entry; |
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|
899 } |
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|
900 |
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|
901 // stack slot for entry i |
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|
902 uint stack_slot(int i) const { |
12882
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|
903 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
904 return _pd->uint_at(stack_slot_offset(i)); |
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|
905 } |
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|
906 |
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|
907 // set stack slot for entry i |
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|
908 void set_stack_slot(int i, uint num) { |
12882
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|
909 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
910 _pd->set_uint_at(stack_slot_offset(i), num); |
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|
911 } |
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|
912 |
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|
913 // type for entry i |
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|
914 intptr_t type(int i) const { |
12882
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|
915 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
916 return _pd->intptr_at(type_offset(i)); |
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|
917 } |
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|
918 |
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|
919 // set type for entry i |
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|
920 void set_type(int i, intptr_t k) { |
12882
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|
921 assert(i >= 0 && i < _number_of_entries, "oob"); |
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|
922 _pd->set_intptr_at(type_offset(i), k); |
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|
923 } |
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|
924 |
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|
925 static ByteSize per_arg_size() { |
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|
926 return in_ByteSize(per_arg_cell_count * DataLayout::cell_size); |
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|
927 } |
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changeset
|
928 |
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|
929 static int per_arg_count() { |
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|
930 return per_arg_cell_count ; |
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|
931 } |
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|
932 |
12882
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|
933 // GC support |
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|
934 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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|
935 |
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|
936 #ifndef PRODUCT |
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|
937 void print_data_on(outputStream* st) const; |
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|
938 #endif |
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|
939 }; |
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|
940 |
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|
941 // Type entry used for return from a call. A single cell to record the |
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|
942 // type. |
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|
943 class ReturnTypeEntry : public TypeEntries { |
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|
944 |
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|
945 private: |
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|
946 enum { |
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|
947 cell_count = 1 |
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|
948 }; |
ce0cc25bc5e2
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|
949 |
ce0cc25bc5e2
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|
950 public: |
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|
951 ReturnTypeEntry(int base_off) |
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952 : TypeEntries(base_off) {} |
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953 |
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954 void post_initialize() { |
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955 set_type(type_none()); |
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956 } |
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957 |
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958 intptr_t type() const { |
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959 return _pd->intptr_at(_base_off); |
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960 } |
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961 |
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962 void set_type(intptr_t k) { |
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963 _pd->set_intptr_at(_base_off, k); |
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964 } |
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965 |
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966 static int static_cell_count() { |
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967 return cell_count; |
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968 } |
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969 |
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970 static ByteSize size() { |
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971 return in_ByteSize(cell_count * DataLayout::cell_size); |
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972 } |
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973 |
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974 ByteSize type_offset() { |
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975 return DataLayout::cell_offset(_base_off); |
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976 } |
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977 |
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978 // GC support |
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979 void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
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980 |
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981 #ifndef PRODUCT |
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982 void print_data_on(outputStream* st) const; |
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983 #endif |
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984 }; |
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985 |
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986 // Entries to collect type information at a call: contains arguments |
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987 // (TypeStackSlotEntries), a return type (ReturnTypeEntry) and a |
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988 // number of cells. Because the number of cells for the return type is |
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989 // smaller than the number of cells for the type of an arguments, the |
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990 // number of cells is used to tell how many arguments are profiled and |
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991 // whether a return value is profiled. See has_arguments() and |
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992 // has_return(). |
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993 class TypeEntriesAtCall { |
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994 private: |
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995 static int stack_slot_local_offset(int i) { |
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996 return header_cell_count() + TypeStackSlotEntries::stack_slot_local_offset(i); |
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997 } |
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998 |
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999 static int argument_type_local_offset(int i) { |
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1000 return header_cell_count() + TypeStackSlotEntries::type_local_offset(i);; |
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1001 } |
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1002 |
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1003 public: |
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1004 |
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1005 static int header_cell_count() { |
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1006 return 1; |
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1007 } |
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1008 |
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1009 static int cell_count_local_offset() { |
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1010 return 0; |
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1011 } |
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1012 |
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1013 static int compute_cell_count(BytecodeStream* stream); |
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1014 |
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1015 static void initialize(DataLayout* dl, int base, int cell_count) { |
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1016 int off = base + cell_count_local_offset(); |
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1017 dl->set_cell_at(off, cell_count - base - header_cell_count()); |
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1018 } |
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1019 |
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1020 static bool arguments_profiling_enabled(); |
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1021 static bool return_profiling_enabled(); |
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1022 |
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1023 // Code generation support |
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1024 static ByteSize cell_count_offset() { |
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1025 return in_ByteSize(cell_count_local_offset() * DataLayout::cell_size); |
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1026 } |
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1027 |
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1028 static ByteSize args_data_offset() { |
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1029 return in_ByteSize(header_cell_count() * DataLayout::cell_size); |
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1030 } |
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1031 |
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1032 static ByteSize stack_slot_offset(int i) { |
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1033 return in_ByteSize(stack_slot_local_offset(i) * DataLayout::cell_size); |
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1034 } |
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1035 |
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1036 static ByteSize argument_type_offset(int i) { |
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1037 return in_ByteSize(argument_type_local_offset(i) * DataLayout::cell_size); |
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1038 } |
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1039 }; |
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1040 |
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1041 // CallTypeData |
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1042 // |
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1043 // A CallTypeData is used to access profiling information about a non |
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1044 // virtual call for which we collect type information about arguments |
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1045 // and return value. |
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1046 class CallTypeData : public CounterData { |
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1047 private: |
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1048 // entries for arguments if any |
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1049 TypeStackSlotEntries _args; |
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1050 // entry for return type if any |
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1051 ReturnTypeEntry _ret; |
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1052 |
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1053 int cell_count_global_offset() const { |
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1054 return CounterData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
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1055 } |
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1056 |
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1057 // number of cells not counting the header |
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1058 int cell_count_no_header() const { |
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1059 return uint_at(cell_count_global_offset()); |
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1060 } |
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1061 |
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1062 void check_number_of_arguments(int total) { |
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1063 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
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1064 } |
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1065 |
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1066 public: |
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1067 CallTypeData(DataLayout* layout) : |
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1068 CounterData(layout), |
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1069 _args(CounterData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
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1070 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
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1071 { |
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1072 assert(layout->tag() == DataLayout::call_type_data_tag, "wrong type"); |
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1073 // Some compilers (VC++) don't want this passed in member initialization list |
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1074 _args.set_profile_data(this); |
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1075 _ret.set_profile_data(this); |
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1076 } |
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1077 |
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1078 const TypeStackSlotEntries* args() const { |
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1079 assert(has_arguments(), "no profiling of arguments"); |
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1080 return &_args; |
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1081 } |
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1082 |
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1083 const ReturnTypeEntry* ret() const { |
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1084 assert(has_return(), "no profiling of return value"); |
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1085 return &_ret; |
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1086 } |
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1087 |
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1088 virtual bool is_CallTypeData() const { return true; } |
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1089 |
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1090 static int static_cell_count() { |
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1091 return -1; |
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1092 } |
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1093 |
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1094 static int compute_cell_count(BytecodeStream* stream) { |
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1095 return CounterData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
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1096 } |
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1097 |
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1098 static void initialize(DataLayout* dl, int cell_count) { |
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1099 TypeEntriesAtCall::initialize(dl, CounterData::static_cell_count(), cell_count); |
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1100 } |
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1101 |
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1102 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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1103 |
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1104 virtual int cell_count() const { |
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1105 return CounterData::static_cell_count() + |
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1106 TypeEntriesAtCall::header_cell_count() + |
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1107 int_at_unchecked(cell_count_global_offset()); |
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1108 } |
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1109 |
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1110 int number_of_arguments() const { |
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1111 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
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1112 } |
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1113 |
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1114 void set_argument_type(int i, Klass* k) { |
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1115 assert(has_arguments(), "no arguments!"); |
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1116 intptr_t current = _args.type(i); |
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1117 _args.set_type(i, TypeEntries::with_status(k, current)); |
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1118 } |
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1119 |
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1120 void set_return_type(Klass* k) { |
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1121 assert(has_return(), "no return!"); |
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1122 intptr_t current = _ret.type(); |
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1123 _ret.set_type(TypeEntries::with_status(k, current)); |
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1124 } |
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1125 |
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1126 // An entry for a return value takes less space than an entry for an |
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1127 // argument so if the number of cells exceeds the number of cells |
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1128 // needed for an argument, this object contains type information for |
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1129 // at least one argument. |
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1130 bool has_arguments() const { |
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1131 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1132 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1133 return res; |
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1134 } |
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1135 |
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1136 // An entry for a return value takes less space than an entry for an |
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1137 // argument, so if the remainder of the number of cells divided by |
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1138 // the number of cells for an argument is not null, a return value |
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1139 // is profiled in this object. |
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1140 bool has_return() const { |
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1141 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
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1142 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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1143 return res; |
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1144 } |
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1145 |
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1146 // Code generation support |
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1147 static ByteSize args_data_offset() { |
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1148 return cell_offset(CounterData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1149 } |
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1150 |
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1151 // GC support |
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1152 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1153 if (has_arguments()) { |
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1154 _args.clean_weak_klass_links(is_alive_closure); |
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1155 } |
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1156 if (has_return()) { |
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1157 _ret.clean_weak_klass_links(is_alive_closure); |
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1158 } |
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1159 } |
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1160 |
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1161 #ifndef PRODUCT |
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1162 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1163 #endif |
1164 }; | |
1165 | |
1166 // ReceiverTypeData | |
1167 // | |
1168 // A ReceiverTypeData is used to access profiling information about a | |
1169 // dynamic type check. It consists of a counter which counts the total times | |
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1170 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 1171 // which are used to store a type profile for the receiver of the check. |
1172 class ReceiverTypeData : public CounterData { | |
1173 protected: | |
1174 enum { | |
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1175 #ifdef GRAAL |
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1176 // Description of the different counters |
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1177 // ReceiverTypeData for instanceof/checkcast/aastore: |
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1178 // C1/C2: count is incremented on type overflow and decremented for failed type checks |
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1179 // Graal: count decremented for failed type checks and nonprofiled_count is incremented on type overflow |
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1180 // TODO (chaeubl): in fact, Graal should also increment the count for failed type checks to mimic the C1/C2 behavior |
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1181 // VirtualCallData for invokevirtual/invokeinterface: |
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1182 // C1/C2: count is incremented on type overflow |
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1183 // Graal: count is incremented on type overflow, nonprofiled_count is incremented on method overflow |
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1184 |
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1185 // Graal is interested in knowing the percentage of type checks involving a type not explicitly in the profile |
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1186 nonprofiled_count_off_set = counter_cell_count, |
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1187 receiver0_offset, |
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1188 #else |
0 | 1189 receiver0_offset = counter_cell_count, |
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1190 #endif |
0 | 1191 count0_offset, |
1192 receiver_type_row_cell_count = (count0_offset + 1) - receiver0_offset | |
1193 }; | |
1194 | |
1195 public: | |
1196 ReceiverTypeData(DataLayout* layout) : CounterData(layout) { | |
1197 assert(layout->tag() == DataLayout::receiver_type_data_tag || | |
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1198 layout->tag() == DataLayout::virtual_call_data_tag || |
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1199 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1200 } |
1201 | |
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1202 virtual bool is_ReceiverTypeData() const { return true; } |
0 | 1203 |
1204 static int static_cell_count() { | |
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1205 return counter_cell_count + (uint) TypeProfileWidth * receiver_type_row_cell_count GRAAL_ONLY(+ 1); |
0 | 1206 } |
1207 | |
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1208 virtual int cell_count() const { |
0 | 1209 return static_cell_count(); |
1210 } | |
1211 | |
1212 // Direct accessors | |
1213 static uint row_limit() { | |
1214 return TypeProfileWidth; | |
1215 } | |
1216 static int receiver_cell_index(uint row) { | |
1217 return receiver0_offset + row * receiver_type_row_cell_count; | |
1218 } | |
1219 static int receiver_count_cell_index(uint row) { | |
1220 return count0_offset + row * receiver_type_row_cell_count; | |
1221 } | |
1222 | |
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1223 Klass* receiver(uint row) const { |
0 | 1224 assert(row < row_limit(), "oob"); |
1225 | |
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1226 Klass* recv = (Klass*)intptr_at(receiver_cell_index(row)); |
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1227 assert(recv == NULL || recv->is_klass(), "wrong type"); |
0 | 1228 return recv; |
1229 } | |
1230 | |
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1231 void set_receiver(uint row, Klass* k) { |
941 | 1232 assert((uint)row < row_limit(), "oob"); |
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1233 set_intptr_at(receiver_cell_index(row), (uintptr_t)k); |
941 | 1234 } |
1235 | |
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1236 uint receiver_count(uint row) const { |
0 | 1237 assert(row < row_limit(), "oob"); |
1238 return uint_at(receiver_count_cell_index(row)); | |
1239 } | |
1240 | |
941 | 1241 void set_receiver_count(uint row, uint count) { |
1242 assert(row < row_limit(), "oob"); | |
1243 set_uint_at(receiver_count_cell_index(row), count); | |
1244 } | |
1245 | |
1246 void clear_row(uint row) { | |
1247 assert(row < row_limit(), "oob"); | |
1251
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1248 // Clear total count - indicator of polymorphic call site. |
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1249 // The site may look like as monomorphic after that but |
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1250 // it allow to have more accurate profiling information because |
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1251 // there was execution phase change since klasses were unloaded. |
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1252 // If the site is still polymorphic then MDO will be updated |
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1253 // to reflect it. But it could be the case that the site becomes |
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1254 // only bimorphic. Then keeping total count not 0 will be wrong. |
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1255 // Even if we use monomorphic (when it is not) for compilation |
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1256 // we will only have trap, deoptimization and recompile again |
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1257 // with updated MDO after executing method in Interpreter. |
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1258 // An additional receiver will be recorded in the cleaned row |
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1259 // during next call execution. |
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1260 // |
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1261 // Note: our profiling logic works with empty rows in any slot. |
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1262 // We do sorting a profiling info (ciCallProfile) for compilation. |
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1263 // |
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1264 set_count(0); |
941 | 1265 set_receiver(row, NULL); |
1266 set_receiver_count(row, 0); | |
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1267 #ifdef GRAAL |
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1268 if (!this->is_VirtualCallData()) { |
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1269 // if this is a ReceiverTypeData for Graal, the nonprofiled_count |
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1270 // must also be reset (see "Description of the different counters" above) |
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1271 set_nonprofiled_count(0); |
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1272 } |
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1273 #endif |
941 | 1274 } |
1275 | |
0 | 1276 // Code generation support |
1277 static ByteSize receiver_offset(uint row) { | |
1278 return cell_offset(receiver_cell_index(row)); | |
1279 } | |
1280 static ByteSize receiver_count_offset(uint row) { | |
1281 return cell_offset(receiver_count_cell_index(row)); | |
1282 } | |
7154
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Doug Simon <doug.simon@oracle.com>
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|
1283 #ifdef GRAAL |
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1284 static ByteSize nonprofiled_receiver_count_offset() { |
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1285 return cell_offset(nonprofiled_count_off_set); |
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1286 } |
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1287 uint nonprofiled_count() const { |
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1288 return uint_at(nonprofiled_count_off_set); |
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1289 } |
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1290 void set_nonprofiled_count(uint count) { |
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1291 set_uint_at(nonprofiled_count_off_set, count); |
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1292 } |
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1293 #endif |
0 | 1294 static ByteSize receiver_type_data_size() { |
1295 return cell_offset(static_cell_count()); | |
1296 } | |
1297 | |
1298 // GC support | |
6725
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1299 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
0 | 1300 |
14420
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1301 #ifdef CC_INTERP |
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1302 static int receiver_type_data_size_in_bytes() { |
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1303 return cell_offset_in_bytes(static_cell_count()); |
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1304 } |
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1305 |
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1306 static Klass *receiver_unchecked(DataLayout* layout, uint row) { |
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1307 Klass* recv = (Klass*)layout->cell_at(receiver_cell_index(row)); |
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1308 return recv; |
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1309 } |
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1310 |
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1311 static void increment_receiver_count_no_overflow(DataLayout* layout, Klass *rcvr) { |
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1312 const int num_rows = row_limit(); |
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1313 // Receiver already exists? |
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1314 for (int row = 0; row < num_rows; row++) { |
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1315 if (receiver_unchecked(layout, row) == rcvr) { |
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1316 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1317 return; |
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1318 } |
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1319 } |
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1320 // New receiver, find a free slot. |
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1321 for (int row = 0; row < num_rows; row++) { |
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1322 if (receiver_unchecked(layout, row) == NULL) { |
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1323 set_intptr_at(layout, receiver_cell_index(row), (intptr_t)rcvr); |
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1324 increment_uint_at_no_overflow(layout, receiver_count_cell_index(row)); |
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1325 return; |
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1326 } |
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1327 } |
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1328 // Receiver did not match any saved receiver and there is no empty row for it. |
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1329 // Increment total counter to indicate polymorphic case. |
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1330 increment_count_no_overflow(layout); |
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1331 } |
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1332 |
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1333 static DataLayout* advance(DataLayout* layout) { |
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1334 return (DataLayout*) (((address)layout) + (ssize_t)ReceiverTypeData::receiver_type_data_size_in_bytes()); |
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1335 } |
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1336 #endif // CC_INTERP |
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1337 |
0 | 1338 #ifndef PRODUCT |
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1339 void print_receiver_data_on(outputStream* st) const; |
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1340 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1341 #endif |
1342 }; | |
1343 | |
1344 // VirtualCallData | |
1345 // | |
1346 // A VirtualCallData is used to access profiling information about a | |
1347 // virtual call. For now, it has nothing more than a ReceiverTypeData. | |
1348 class VirtualCallData : public ReceiverTypeData { | |
1349 public: | |
1350 VirtualCallData(DataLayout* layout) : ReceiverTypeData(layout) { | |
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1351 assert(layout->tag() == DataLayout::virtual_call_data_tag || |
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1352 layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
0 | 1353 } |
1354 | |
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1355 virtual bool is_VirtualCallData() const { return true; } |
0 | 1356 |
1357 static int static_cell_count() { | |
1358 // At this point we could add more profile state, e.g., for arguments. | |
1359 // But for now it's the same size as the base record type. | |
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1360 return ReceiverTypeData::static_cell_count() GRAAL_ONLY(+ (uint) MethodProfileWidth * receiver_type_row_cell_count); |
0 | 1361 } |
1362 | |
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1363 virtual int cell_count() const { |
0 | 1364 return static_cell_count(); |
1365 } | |
1366 | |
1367 // Direct accessors | |
1368 static ByteSize virtual_call_data_size() { | |
1369 return cell_offset(static_cell_count()); | |
1370 } | |
1371 | |
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1372 #ifdef CC_INTERP |
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1373 static int virtual_call_data_size_in_bytes() { |
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1374 return cell_offset_in_bytes(static_cell_count()); |
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1375 } |
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1376 |
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1377 static DataLayout* advance(DataLayout* layout) { |
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1378 return (DataLayout*) (((address)layout) + (ssize_t)VirtualCallData::virtual_call_data_size_in_bytes()); |
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1379 } |
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1380 #endif // CC_INTERP |
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1381 |
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1382 #ifdef GRAAL |
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1383 static ByteSize method_offset(uint row) { |
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1384 return cell_offset(method_cell_index(row)); |
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1385 } |
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1386 static ByteSize method_count_offset(uint row) { |
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1387 return cell_offset(method_count_cell_index(row)); |
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1388 } |
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1389 static int method_cell_index(uint row) { |
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1390 return receiver0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1391 } |
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1392 static int method_count_cell_index(uint row) { |
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1393 return count0_offset + (row + TypeProfileWidth) * receiver_type_row_cell_count; |
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1394 } |
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1395 static uint method_row_limit() { |
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1396 return MethodProfileWidth; |
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1397 } |
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1398 |
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1399 Method* method(uint row) const { |
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1400 assert(row < method_row_limit(), "oob"); |
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1401 |
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1402 Method* method = (Method*)intptr_at(method_cell_index(row)); |
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1403 assert(method == NULL || method->is_method(), "must be"); |
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1404 return method; |
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1405 } |
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9760
diff
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|
1406 |
13108
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added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
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diff
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|
1407 uint method_count(uint row) const { |
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
parents:
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diff
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|
1408 assert(row < method_row_limit(), "oob"); |
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
parents:
13086
diff
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|
1409 return uint_at(method_count_cell_index(row)); |
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
parents:
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diff
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|
1410 } |
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added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
1411 |
9762
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1412 void set_method(uint row, Method* m) { |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1413 assert((uint)row < method_row_limit(), "oob"); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1414 set_intptr_at(method_cell_index(row), (uintptr_t)m); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1415 } |
9760
c76b43ed5089
Added infrastructure for recording invoked methods in the profiling information.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9088
diff
changeset
|
1416 |
9762
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1417 void set_method_count(uint row, uint count) { |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1418 assert(row < method_row_limit(), "oob"); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1419 set_uint_at(method_count_cell_index(row), count); |
0 | 1420 } |
1421 | |
9762
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1422 void clear_method_row(uint row) { |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1423 assert(row < method_row_limit(), "oob"); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1424 // Clear total count - indicator of polymorphic call site (see comment for clear_row() in ReceiverTypeData). |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1425 set_nonprofiled_count(0); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1426 set_method(row, NULL); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1427 set_method_count(row, 0); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1428 } |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1429 |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1430 // GC support |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1431 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure); |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
parents:
9760
diff
changeset
|
1432 #endif |
57e5211846f9
Added class unloading support to the method profiling infrastructure.
Christian Haeubl <haeubl@ssw.jku.at>
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diff
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|
1433 |
0 | 1434 #ifndef PRODUCT |
13108
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
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diff
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|
1435 #ifdef GRAAL |
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
parents:
13086
diff
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|
1436 void print_method_data_on(outputStream* st) const; |
d84fa69a9874
added support for printing method profiles for virtual calls
Doug Simon <doug.simon@oracle.com>
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diff
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|
1437 #endif |
14500
fdad2932c73f
8031752: Failed speculative optimizations should be reattempted when root of compilation is different
roland
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14435
diff
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|
1438 void print_data_on(outputStream* st, const char* extra = NULL) const; |
12875
d13d7aba8c12
8023657: New type profiling points: arguments to call
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12316
diff
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|
1439 #endif |
d13d7aba8c12
8023657: New type profiling points: arguments to call
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12316
diff
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|
1440 }; |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
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diff
changeset
|
1441 |
d13d7aba8c12
8023657: New type profiling points: arguments to call
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12316
diff
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|
1442 // VirtualCallTypeData |
d13d7aba8c12
8023657: New type profiling points: arguments to call
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parents:
12316
diff
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|
1443 // |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
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12316
diff
changeset
|
1444 // A VirtualCallTypeData is used to access profiling information about |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
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|
1445 // a virtual call for which we collect type information about |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
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|
1446 // arguments and return value. |
12875
d13d7aba8c12
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12316
diff
changeset
|
1447 class VirtualCallTypeData : public VirtualCallData { |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
changeset
|
1448 private: |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
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|
1449 // entries for arguments if any |
12875
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12316
diff
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|
1450 TypeStackSlotEntries _args; |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1451 // entry for return type if any |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1452 ReturnTypeEntry _ret; |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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diff
changeset
|
1453 |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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changeset
|
1454 int cell_count_global_offset() const { |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1455 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::cell_count_local_offset(); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1456 } |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1457 |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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diff
changeset
|
1458 // number of cells not counting the header |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
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|
1459 int cell_count_no_header() const { |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
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|
1460 return uint_at(cell_count_global_offset()); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1461 } |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1462 |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1463 void check_number_of_arguments(int total) { |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1464 assert(number_of_arguments() == total, "should be set in DataLayout::initialize"); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1465 } |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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changeset
|
1466 |
12875
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12316
diff
changeset
|
1467 public: |
d13d7aba8c12
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12316
diff
changeset
|
1468 VirtualCallTypeData(DataLayout* layout) : |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
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|
1469 VirtualCallData(layout), |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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12875
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changeset
|
1470 _args(VirtualCallData::static_cell_count()+TypeEntriesAtCall::header_cell_count(), number_of_arguments()), |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1471 _ret(cell_count() - ReturnTypeEntry::static_cell_count()) |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
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|
1472 { |
12875
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parents:
12316
diff
changeset
|
1473 assert(layout->tag() == DataLayout::virtual_call_type_data_tag, "wrong type"); |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
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|
1474 // Some compilers (VC++) don't want this passed in member initialization list |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
changeset
|
1475 _args.set_profile_data(this); |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1476 _ret.set_profile_data(this); |
12875
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12316
diff
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|
1477 } |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
changeset
|
1478 |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1479 const TypeStackSlotEntries* args() const { |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
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changeset
|
1480 assert(has_arguments(), "no profiling of arguments"); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1481 return &_args; |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1482 } |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1483 |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1484 const ReturnTypeEntry* ret() const { |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
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changeset
|
1485 assert(has_return(), "no profiling of return value"); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1486 return &_ret; |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1487 } |
12875
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8023657: New type profiling points: arguments to call
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12316
diff
changeset
|
1488 |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
1489 virtual bool is_VirtualCallTypeData() const { return true; } |
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8023657: New type profiling points: arguments to call
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parents:
12316
diff
changeset
|
1490 |
d13d7aba8c12
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parents:
12316
diff
changeset
|
1491 static int static_cell_count() { |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
changeset
|
1492 return -1; |
d13d7aba8c12
8023657: New type profiling points: arguments to call
roland
parents:
12316
diff
changeset
|
1493 } |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
1494 |
d13d7aba8c12
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parents:
12316
diff
changeset
|
1495 static int compute_cell_count(BytecodeStream* stream) { |
12882
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
parents:
12875
diff
changeset
|
1496 return VirtualCallData::static_cell_count() + TypeEntriesAtCall::compute_cell_count(stream); |
12875
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roland
parents:
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|
1497 } |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
1498 |
d13d7aba8c12
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roland
parents:
12316
diff
changeset
|
1499 static void initialize(DataLayout* dl, int cell_count) { |
12882
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8026054: New type profiling points: type of return values at calls
roland
parents:
12875
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|
1500 TypeEntriesAtCall::initialize(dl, VirtualCallData::static_cell_count(), cell_count); |
12875
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diff
changeset
|
1501 } |
d13d7aba8c12
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12316
diff
changeset
|
1502 |
12882
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8026054: New type profiling points: type of return values at calls
roland
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12875
diff
changeset
|
1503 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
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|
1504 |
12875
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changeset
|
1505 virtual int cell_count() const { |
12882
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8026054: New type profiling points: type of return values at calls
roland
parents:
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|
1506 return VirtualCallData::static_cell_count() + |
ce0cc25bc5e2
8026054: New type profiling points: type of return values at calls
roland
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|
1507 TypeEntriesAtCall::header_cell_count() + |
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8026054: New type profiling points: type of return values at calls
roland
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changeset
|
1508 int_at_unchecked(cell_count_global_offset()); |
12875
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|
1509 } |
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12316
diff
changeset
|
1510 |
12882
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roland
parents:
12875
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changeset
|
1511 int number_of_arguments() const { |
ce0cc25bc5e2
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12875
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changeset
|
1512 return cell_count_no_header() / TypeStackSlotEntries::per_arg_count(); |
12875
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|
1513 } |
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12316
diff
changeset
|
1514 |
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12316
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changeset
|
1515 void set_argument_type(int i, Klass* k) { |
12882
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8026054: New type profiling points: type of return values at calls
roland
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|
1516 assert(has_arguments(), "no arguments!"); |
12875
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|
1517 intptr_t current = _args.type(i); |
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|
1518 _args.set_type(i, TypeEntries::with_status(k, current)); |
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|
1519 } |
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changeset
|
1520 |
12882
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roland
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12875
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|
1521 void set_return_type(Klass* k) { |
ce0cc25bc5e2
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changeset
|
1522 assert(has_return(), "no return!"); |
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changeset
|
1523 intptr_t current = _ret.type(); |
ce0cc25bc5e2
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|
1524 _ret.set_type(TypeEntries::with_status(k, current)); |
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|
1525 } |
ce0cc25bc5e2
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roland
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changeset
|
1526 |
ce0cc25bc5e2
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roland
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|
1527 // An entry for a return value takes less space than an entry for an |
ce0cc25bc5e2
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roland
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|
1528 // argument, so if the remainder of the number of cells divided by |
ce0cc25bc5e2
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roland
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|
1529 // the number of cells for an argument is not null, a return value |
ce0cc25bc5e2
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roland
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changeset
|
1530 // is profiled in this object. |
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roland
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changeset
|
1531 bool has_return() const { |
ce0cc25bc5e2
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changeset
|
1532 bool res = (cell_count_no_header() % TypeStackSlotEntries::per_arg_count()) != 0; |
ce0cc25bc5e2
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roland
parents:
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changeset
|
1533 assert (!res || TypeEntriesAtCall::return_profiling_enabled(), "no profiling of return values"); |
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|
1534 return res; |
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1535 } |
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1536 |
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1537 // An entry for a return value takes less space than an entry for an |
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1538 // argument so if the number of cells exceeds the number of cells |
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1539 // needed for an argument, this object contains type information for |
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1540 // at least one argument. |
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1541 bool has_arguments() const { |
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1542 bool res = cell_count_no_header() >= TypeStackSlotEntries::per_arg_count(); |
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1543 assert (!res || TypeEntriesAtCall::arguments_profiling_enabled(), "no profiling of arguments"); |
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1544 return res; |
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1545 } |
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1546 |
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1547 // Code generation support |
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1548 static ByteSize args_data_offset() { |
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1549 return cell_offset(VirtualCallData::static_cell_count()) + TypeEntriesAtCall::args_data_offset(); |
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1550 } |
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1551 |
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1552 // GC support |
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1553 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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1554 ReceiverTypeData::clean_weak_klass_links(is_alive_closure); |
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1555 if (has_arguments()) { |
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1556 _args.clean_weak_klass_links(is_alive_closure); |
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1557 } |
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1558 if (has_return()) { |
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1559 _ret.clean_weak_klass_links(is_alive_closure); |
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1560 } |
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1561 } |
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1562 |
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1563 #ifndef PRODUCT |
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1564 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1565 #endif |
1566 }; | |
1567 | |
1568 // RetData | |
1569 // | |
1570 // A RetData is used to access profiling information for a ret bytecode. | |
1571 // It is composed of a count of the number of times that the ret has | |
1572 // been executed, followed by a series of triples of the form | |
1573 // (bci, count, di) which count the number of times that some bci was the | |
1574 // target of the ret and cache a corresponding data displacement. | |
1575 class RetData : public CounterData { | |
1576 protected: | |
1577 enum { | |
1578 bci0_offset = counter_cell_count, | |
1579 count0_offset, | |
1580 displacement0_offset, | |
1581 ret_row_cell_count = (displacement0_offset + 1) - bci0_offset | |
1582 }; | |
1583 | |
1584 void set_bci(uint row, int bci) { | |
1585 assert((uint)row < row_limit(), "oob"); | |
1586 set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1587 } | |
1588 void release_set_bci(uint row, int bci) { | |
1589 assert((uint)row < row_limit(), "oob"); | |
1590 // 'release' when setting the bci acts as a valid flag for other | |
1591 // threads wrt bci_count and bci_displacement. | |
1592 release_set_int_at(bci0_offset + row * ret_row_cell_count, bci); | |
1593 } | |
1594 void set_bci_count(uint row, uint count) { | |
1595 assert((uint)row < row_limit(), "oob"); | |
1596 set_uint_at(count0_offset + row * ret_row_cell_count, count); | |
1597 } | |
1598 void set_bci_displacement(uint row, int disp) { | |
1599 set_int_at(displacement0_offset + row * ret_row_cell_count, disp); | |
1600 } | |
1601 | |
1602 public: | |
1603 RetData(DataLayout* layout) : CounterData(layout) { | |
1604 assert(layout->tag() == DataLayout::ret_data_tag, "wrong type"); | |
1605 } | |
1606 | |
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1607 virtual bool is_RetData() const { return true; } |
0 | 1608 |
1609 enum { | |
1610 no_bci = -1 // value of bci when bci1/2 are not in use. | |
1611 }; | |
1612 | |
1613 static int static_cell_count() { | |
1614 return counter_cell_count + (uint) BciProfileWidth * ret_row_cell_count; | |
1615 } | |
1616 | |
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1617 virtual int cell_count() const { |
0 | 1618 return static_cell_count(); |
1619 } | |
1620 | |
1621 static uint row_limit() { | |
1622 return BciProfileWidth; | |
1623 } | |
1624 static int bci_cell_index(uint row) { | |
1625 return bci0_offset + row * ret_row_cell_count; | |
1626 } | |
1627 static int bci_count_cell_index(uint row) { | |
1628 return count0_offset + row * ret_row_cell_count; | |
1629 } | |
1630 static int bci_displacement_cell_index(uint row) { | |
1631 return displacement0_offset + row * ret_row_cell_count; | |
1632 } | |
1633 | |
1634 // Direct accessors | |
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1635 int bci(uint row) const { |
0 | 1636 return int_at(bci_cell_index(row)); |
1637 } | |
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1638 uint bci_count(uint row) const { |
0 | 1639 return uint_at(bci_count_cell_index(row)); |
1640 } | |
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1641 int bci_displacement(uint row) const { |
0 | 1642 return int_at(bci_displacement_cell_index(row)); |
1643 } | |
1644 | |
1645 // Interpreter Runtime support | |
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1646 address fixup_ret(int return_bci, MethodData* mdo); |
0 | 1647 |
1648 // Code generation support | |
1649 static ByteSize bci_offset(uint row) { | |
1650 return cell_offset(bci_cell_index(row)); | |
1651 } | |
1652 static ByteSize bci_count_offset(uint row) { | |
1653 return cell_offset(bci_count_cell_index(row)); | |
1654 } | |
1655 static ByteSize bci_displacement_offset(uint row) { | |
1656 return cell_offset(bci_displacement_cell_index(row)); | |
1657 } | |
1658 | |
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1659 #ifdef CC_INTERP |
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1660 static DataLayout* advance(MethodData *md, int bci); |
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1661 #endif // CC_INTERP |
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1662 |
0 | 1663 // Specific initialization. |
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1664 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1665 |
1666 #ifndef PRODUCT | |
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1667 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1668 #endif |
1669 }; | |
1670 | |
1671 // BranchData | |
1672 // | |
1673 // A BranchData is used to access profiling data for a two-way branch. | |
1674 // It consists of taken and not_taken counts as well as a data displacement | |
1675 // for the taken case. | |
1676 class BranchData : public JumpData { | |
1677 protected: | |
1678 enum { | |
1679 not_taken_off_set = jump_cell_count, | |
1680 branch_cell_count | |
1681 }; | |
1682 | |
1683 void set_displacement(int displacement) { | |
1684 set_int_at(displacement_off_set, displacement); | |
1685 } | |
1686 | |
1687 public: | |
1688 BranchData(DataLayout* layout) : JumpData(layout) { | |
1689 assert(layout->tag() == DataLayout::branch_data_tag, "wrong type"); | |
1690 } | |
1691 | |
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1692 virtual bool is_BranchData() const { return true; } |
0 | 1693 |
1694 static int static_cell_count() { | |
1695 return branch_cell_count; | |
1696 } | |
1697 | |
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1698 virtual int cell_count() const { |
0 | 1699 return static_cell_count(); |
1700 } | |
1701 | |
1702 // Direct accessor | |
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1703 uint not_taken() const { |
0 | 1704 return uint_at(not_taken_off_set); |
1705 } | |
1706 | |
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1707 void set_not_taken(uint cnt) { |
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1708 set_uint_at(not_taken_off_set, cnt); |
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1709 } |
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1710 |
0 | 1711 uint inc_not_taken() { |
1712 uint cnt = not_taken() + 1; | |
1713 // Did we wrap? Will compiler screw us?? | |
1714 if (cnt == 0) cnt--; | |
1715 set_uint_at(not_taken_off_set, cnt); | |
1716 return cnt; | |
1717 } | |
1718 | |
1719 // Code generation support | |
1720 static ByteSize not_taken_offset() { | |
1721 return cell_offset(not_taken_off_set); | |
1722 } | |
1723 static ByteSize branch_data_size() { | |
1724 return cell_offset(branch_cell_count); | |
1725 } | |
1726 | |
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1727 #ifdef CC_INTERP |
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1728 static int branch_data_size_in_bytes() { |
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1729 return cell_offset_in_bytes(branch_cell_count); |
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1730 } |
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1731 |
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1732 static void increment_not_taken_count_no_overflow(DataLayout* layout) { |
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1733 increment_uint_at_no_overflow(layout, not_taken_off_set); |
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1734 } |
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1735 |
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1736 static DataLayout* advance_not_taken(DataLayout* layout) { |
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1737 return (DataLayout*) (((address)layout) + (ssize_t)BranchData::branch_data_size_in_bytes()); |
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1738 } |
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1739 #endif // CC_INTERP |
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1740 |
0 | 1741 // Specific initialization. |
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1742 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1743 |
1744 #ifndef PRODUCT | |
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1745 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1746 #endif |
1747 }; | |
1748 | |
1749 // ArrayData | |
1750 // | |
1751 // A ArrayData is a base class for accessing profiling data which does | |
1752 // not have a statically known size. It consists of an array length | |
1753 // and an array start. | |
1754 class ArrayData : public ProfileData { | |
1755 protected: | |
1756 friend class DataLayout; | |
1757 | |
1758 enum { | |
1759 array_len_off_set, | |
1760 array_start_off_set | |
1761 }; | |
1762 | |
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1763 uint array_uint_at(int index) const { |
0 | 1764 int aindex = index + array_start_off_set; |
1765 return uint_at(aindex); | |
1766 } | |
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1767 int array_int_at(int index) const { |
0 | 1768 int aindex = index + array_start_off_set; |
1769 return int_at(aindex); | |
1770 } | |
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1771 oop array_oop_at(int index) const { |
0 | 1772 int aindex = index + array_start_off_set; |
1773 return oop_at(aindex); | |
1774 } | |
1775 void array_set_int_at(int index, int value) { | |
1776 int aindex = index + array_start_off_set; | |
1777 set_int_at(aindex, value); | |
1778 } | |
1779 | |
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1780 #ifdef CC_INTERP |
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1781 // Static low level accessors for DataLayout with ArrayData's semantics. |
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1782 |
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1783 static void increment_array_uint_at_no_overflow(DataLayout* layout, int index) { |
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1784 int aindex = index + array_start_off_set; |
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1785 increment_uint_at_no_overflow(layout, aindex); |
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1786 } |
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1787 |
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1788 static int array_int_at(DataLayout* layout, int index) { |
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1789 int aindex = index + array_start_off_set; |
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1790 return int_at(layout, aindex); |
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1791 } |
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1792 #endif // CC_INTERP |
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1793 |
0 | 1794 // Code generation support for subclasses. |
1795 static ByteSize array_element_offset(int index) { | |
1796 return cell_offset(array_start_off_set + index); | |
1797 } | |
1798 | |
1799 public: | |
1800 ArrayData(DataLayout* layout) : ProfileData(layout) {} | |
1801 | |
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1802 virtual bool is_ArrayData() const { return true; } |
0 | 1803 |
1804 static int static_cell_count() { | |
1805 return -1; | |
1806 } | |
1807 | |
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1808 int array_len() const { |
0 | 1809 return int_at_unchecked(array_len_off_set); |
1810 } | |
1811 | |
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1812 virtual int cell_count() const { |
0 | 1813 return array_len() + 1; |
1814 } | |
1815 | |
1816 // Code generation support | |
1817 static ByteSize array_len_offset() { | |
1818 return cell_offset(array_len_off_set); | |
1819 } | |
1820 static ByteSize array_start_offset() { | |
1821 return cell_offset(array_start_off_set); | |
1822 } | |
1823 }; | |
1824 | |
1825 // MultiBranchData | |
1826 // | |
1827 // A MultiBranchData is used to access profiling information for | |
1828 // a multi-way branch (*switch bytecodes). It consists of a series | |
1829 // of (count, displacement) pairs, which count the number of times each | |
1830 // case was taken and specify the data displacment for each branch target. | |
1831 class MultiBranchData : public ArrayData { | |
1832 protected: | |
1833 enum { | |
1834 default_count_off_set, | |
1835 default_disaplacement_off_set, | |
1836 case_array_start | |
1837 }; | |
1838 enum { | |
1839 relative_count_off_set, | |
1840 relative_displacement_off_set, | |
1841 per_case_cell_count | |
1842 }; | |
1843 | |
1844 void set_default_displacement(int displacement) { | |
1845 array_set_int_at(default_disaplacement_off_set, displacement); | |
1846 } | |
1847 void set_displacement_at(int index, int displacement) { | |
1848 array_set_int_at(case_array_start + | |
1849 index * per_case_cell_count + | |
1850 relative_displacement_off_set, | |
1851 displacement); | |
1852 } | |
1853 | |
1854 public: | |
1855 MultiBranchData(DataLayout* layout) : ArrayData(layout) { | |
1856 assert(layout->tag() == DataLayout::multi_branch_data_tag, "wrong type"); | |
1857 } | |
1858 | |
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1859 virtual bool is_MultiBranchData() const { return true; } |
0 | 1860 |
1861 static int compute_cell_count(BytecodeStream* stream); | |
1862 | |
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1863 int number_of_cases() const { |
0 | 1864 int alen = array_len() - 2; // get rid of default case here. |
1865 assert(alen % per_case_cell_count == 0, "must be even"); | |
1866 return (alen / per_case_cell_count); | |
1867 } | |
1868 | |
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1869 uint default_count() const { |
0 | 1870 return array_uint_at(default_count_off_set); |
1871 } | |
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1872 int default_displacement() const { |
0 | 1873 return array_int_at(default_disaplacement_off_set); |
1874 } | |
1875 | |
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1876 uint count_at(int index) const { |
0 | 1877 return array_uint_at(case_array_start + |
1878 index * per_case_cell_count + | |
1879 relative_count_off_set); | |
1880 } | |
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1881 int displacement_at(int index) const { |
0 | 1882 return array_int_at(case_array_start + |
1883 index * per_case_cell_count + | |
1884 relative_displacement_off_set); | |
1885 } | |
1886 | |
1887 // Code generation support | |
1888 static ByteSize default_count_offset() { | |
1889 return array_element_offset(default_count_off_set); | |
1890 } | |
1891 static ByteSize default_displacement_offset() { | |
1892 return array_element_offset(default_disaplacement_off_set); | |
1893 } | |
1894 static ByteSize case_count_offset(int index) { | |
1895 return case_array_offset() + | |
1896 (per_case_size() * index) + | |
1897 relative_count_offset(); | |
1898 } | |
1899 static ByteSize case_array_offset() { | |
1900 return array_element_offset(case_array_start); | |
1901 } | |
1902 static ByteSize per_case_size() { | |
1903 return in_ByteSize(per_case_cell_count) * cell_size; | |
1904 } | |
1905 static ByteSize relative_count_offset() { | |
1906 return in_ByteSize(relative_count_off_set) * cell_size; | |
1907 } | |
1908 static ByteSize relative_displacement_offset() { | |
1909 return in_ByteSize(relative_displacement_off_set) * cell_size; | |
1910 } | |
1911 | |
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1912 #ifdef CC_INTERP |
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1913 static void increment_count_no_overflow(DataLayout* layout, int index) { |
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1914 if (index == -1) { |
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1915 increment_array_uint_at_no_overflow(layout, default_count_off_set); |
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1916 } else { |
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1917 increment_array_uint_at_no_overflow(layout, case_array_start + |
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1918 index * per_case_cell_count + |
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1919 relative_count_off_set); |
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1920 } |
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1921 } |
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1922 |
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1923 static DataLayout* advance(DataLayout* layout, int index) { |
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1924 if (index == -1) { |
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1925 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, default_disaplacement_off_set)); |
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1926 } else { |
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1927 return (DataLayout*) (((address)layout) + (ssize_t)array_int_at(layout, case_array_start + |
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1928 index * per_case_cell_count + |
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1929 relative_displacement_off_set)); |
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1930 } |
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1931 } |
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1932 #endif // CC_INTERP |
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1933 |
0 | 1934 // Specific initialization. |
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1935 void post_initialize(BytecodeStream* stream, MethodData* mdo); |
0 | 1936 |
1937 #ifndef PRODUCT | |
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1938 void print_data_on(outputStream* st, const char* extra = NULL) const; |
0 | 1939 #endif |
1940 }; | |
1941 | |
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1942 class ArgInfoData : public ArrayData { |
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1943 |
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1944 public: |
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1945 ArgInfoData(DataLayout* layout) : ArrayData(layout) { |
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1946 assert(layout->tag() == DataLayout::arg_info_data_tag, "wrong type"); |
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1947 } |
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1948 |
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1949 virtual bool is_ArgInfoData() const { return true; } |
45
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1950 |
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1951 |
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1952 int number_of_args() const { |
45
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1953 return array_len(); |
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1954 } |
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1955 |
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1956 uint arg_modified(int arg) const { |
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1957 return array_uint_at(arg); |
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1958 } |
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1959 |
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1960 void set_arg_modified(int arg, uint val) { |
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1961 array_set_int_at(arg, val); |
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1962 } |
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1963 |
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1964 #ifndef PRODUCT |
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1965 void print_data_on(outputStream* st, const char* extra = NULL) const; |
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1966 #endif |
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1967 }; |
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1968 |
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1969 // ParametersTypeData |
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1970 // |
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1971 // A ParametersTypeData is used to access profiling information about |
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1972 // types of parameters to a method |
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1973 class ParametersTypeData : public ArrayData { |
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1974 |
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1975 private: |
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1976 TypeStackSlotEntries _parameters; |
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1977 |
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1978 static int stack_slot_local_offset(int i) { |
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1979 assert_profiling_enabled(); |
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1980 return array_start_off_set + TypeStackSlotEntries::stack_slot_local_offset(i); |
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1981 } |
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1982 |
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1983 static int type_local_offset(int i) { |
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1984 assert_profiling_enabled(); |
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1985 return array_start_off_set + TypeStackSlotEntries::type_local_offset(i); |
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1986 } |
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1987 |
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1988 static bool profiling_enabled(); |
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1989 static void assert_profiling_enabled() { |
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1990 assert(profiling_enabled(), "method parameters profiling should be on"); |
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1991 } |
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1992 |
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1993 public: |
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1994 ParametersTypeData(DataLayout* layout) : ArrayData(layout), _parameters(1, number_of_parameters()) { |
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1995 assert(layout->tag() == DataLayout::parameters_type_data_tag, "wrong type"); |
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1996 // Some compilers (VC++) don't want this passed in member initialization list |
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1997 _parameters.set_profile_data(this); |
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1998 } |
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1999 |
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2000 static int compute_cell_count(Method* m); |
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2001 |
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2002 virtual bool is_ParametersTypeData() const { return true; } |
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2003 |
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2004 virtual void post_initialize(BytecodeStream* stream, MethodData* mdo); |
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2005 |
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2006 int number_of_parameters() const { |
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2007 return array_len() / TypeStackSlotEntries::per_arg_count(); |
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2008 } |
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2009 |
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2010 const TypeStackSlotEntries* parameters() const { return &_parameters; } |
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2011 |
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2012 uint stack_slot(int i) const { |
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2013 return _parameters.stack_slot(i); |
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2014 } |
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2015 |
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2016 void set_type(int i, Klass* k) { |
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2017 intptr_t current = _parameters.type(i); |
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2018 _parameters.set_type(i, TypeEntries::with_status((intptr_t)k, current)); |
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2019 } |
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2020 |
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2021 virtual void clean_weak_klass_links(BoolObjectClosure* is_alive_closure) { |
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2022 _parameters.clean_weak_klass_links(is_alive_closure); |
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2023 } |
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2024 |
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2025 #ifndef PRODUCT |
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2026 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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2027 #endif |
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2028 |
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2029 static ByteSize stack_slot_offset(int i) { |
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2030 return cell_offset(stack_slot_local_offset(i)); |
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2031 } |
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2032 |
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2033 static ByteSize type_offset(int i) { |
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2034 return cell_offset(type_local_offset(i)); |
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2035 } |
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2036 }; |
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2037 |
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2038 // SpeculativeTrapData |
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2039 // |
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2040 // A SpeculativeTrapData is used to record traps due to type |
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2041 // speculation. It records the root of the compilation: that type |
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2042 // speculation is wrong in the context of one compilation (for |
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2043 // method1) doesn't mean it's wrong in the context of another one (for |
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2044 // method2). Type speculation could have more/different data in the |
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2045 // context of the compilation of method2 and it's worthwhile to try an |
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2046 // optimization that failed for compilation of method1 in the context |
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2047 // of compilation of method2. |
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2048 // Space for SpeculativeTrapData entries is allocated from the extra |
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2049 // data space in the MDO. If we run out of space, the trap data for |
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2050 // the ProfileData at that bci is updated. |
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2051 class SpeculativeTrapData : public ProfileData { |
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2052 protected: |
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2053 enum { |
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2054 method_offset, |
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2055 speculative_trap_cell_count |
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2056 }; |
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2057 public: |
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2058 SpeculativeTrapData(DataLayout* layout) : ProfileData(layout) { |
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2059 assert(layout->tag() == DataLayout::speculative_trap_data_tag, "wrong type"); |
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2060 } |
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2061 |
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2062 virtual bool is_SpeculativeTrapData() const { return true; } |
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2063 |
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2064 static int static_cell_count() { |
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2065 return speculative_trap_cell_count; |
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2066 } |
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2067 |
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2068 virtual int cell_count() const { |
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2069 return static_cell_count(); |
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2070 } |
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2071 |
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2072 // Direct accessor |
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2073 Method* method() const { |
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2074 return (Method*)intptr_at(method_offset); |
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2075 } |
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2076 |
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2077 void set_method(Method* m) { |
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2078 set_intptr_at(method_offset, (intptr_t)m); |
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2079 } |
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2080 |
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2081 #ifndef PRODUCT |
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2082 virtual void print_data_on(outputStream* st, const char* extra = NULL) const; |
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2083 #endif |
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2084 }; |
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2085 |
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2086 // MethodData* |
0 | 2087 // |
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2088 // A MethodData* holds information which has been collected about |
0 | 2089 // a method. Its layout looks like this: |
2090 // | |
2091 // ----------------------------- | |
2092 // | header | | |
2093 // | klass | | |
2094 // ----------------------------- | |
2095 // | method | | |
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2096 // | size of the MethodData* | |
0 | 2097 // ----------------------------- |
2098 // | Data entries... | | |
2099 // | (variable size) | | |
2100 // | | | |
2101 // . . | |
2102 // . . | |
2103 // . . | |
2104 // | | | |
2105 // ----------------------------- | |
2106 // | |
2107 // The data entry area is a heterogeneous array of DataLayouts. Each | |
2108 // DataLayout in the array corresponds to a specific bytecode in the | |
2109 // method. The entries in the array are sorted by the corresponding | |
2110 // bytecode. Access to the data is via resource-allocated ProfileData, | |
2111 // which point to the underlying blocks of DataLayout structures. | |
2112 // | |
2113 // During interpretation, if profiling in enabled, the interpreter | |
2114 // maintains a method data pointer (mdp), which points at the entry | |
2115 // in the array corresponding to the current bci. In the course of | |
2116 // intepretation, when a bytecode is encountered that has profile data | |
2117 // associated with it, the entry pointed to by mdp is updated, then the | |
2118 // mdp is adjusted to point to the next appropriate DataLayout. If mdp | |
2119 // is NULL to begin with, the interpreter assumes that the current method | |
2120 // is not (yet) being profiled. | |
2121 // | |
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2122 // In MethodData* parlance, "dp" is a "data pointer", the actual address |
0 | 2123 // of a DataLayout element. A "di" is a "data index", the offset in bytes |
2124 // from the base of the data entry array. A "displacement" is the byte offset | |
2125 // in certain ProfileData objects that indicate the amount the mdp must be | |
2126 // adjusted in the event of a change in control flow. | |
2127 // | |
2128 | |
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2129 CC_INTERP_ONLY(class BytecodeInterpreter;) |
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2130 |
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2131 class MethodData : public Metadata { |
0 | 2132 friend class VMStructs; |
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2133 CC_INTERP_ONLY(friend class BytecodeInterpreter;) |
0 | 2134 private: |
2135 friend class ProfileData; | |
2136 | |
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2137 // Back pointer to the Method* |
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2138 Method* _method; |
0 | 2139 |
2140 // Size of this oop in bytes | |
2141 int _size; | |
2142 | |
2143 // Cached hint for bci_to_dp and bci_to_data | |
2144 int _hint_di; | |
2145 | |
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2146 MethodData(methodHandle method, int size, TRAPS); |
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2147 public: |
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2148 static MethodData* allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS); |
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2149 MethodData() {}; // For ciMethodData |
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2150 |
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2151 bool is_methodData() const volatile { return true; } |
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2152 void initialize(bool for_reprofile = false); |
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2153 |
0 | 2154 // Whole-method sticky bits and flags |
2155 enum { | |
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2156 #ifdef GRAAL |
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2157 _trap_hist_limit = 18, // decoupled from Deoptimization::Reason_LIMIT |
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2158 #else |
3345 | 2159 _trap_hist_limit = 17, // decoupled from Deoptimization::Reason_LIMIT |
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2160 #endif |
0 | 2161 _trap_hist_mask = max_jubyte, |
2162 _extra_data_count = 4 // extra DataLayout headers, for trap history | |
2163 }; // Public flag values | |
2164 private: | |
2165 uint _nof_decompiles; // count of all nmethod removals | |
2166 uint _nof_overflow_recompiles; // recompile count, excluding recomp. bits | |
2167 uint _nof_overflow_traps; // trap count, excluding _trap_hist | |
2168 union { | |
2169 intptr_t _align; | |
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2170 #ifdef GRAAL |
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2171 u1 _array[2*_trap_hist_limit]; |
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2172 #else |
0 | 2173 u1 _array[_trap_hist_limit]; |
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2174 #endif |
0 | 2175 } _trap_hist; |
2176 | |
2177 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2178 intx _eflags; // flags on escape information | |
2179 intx _arg_local; // bit set of non-escaping arguments | |
2180 intx _arg_stack; // bit set of stack-allocatable arguments | |
2181 intx _arg_returned; // bit set of returned arguments | |
2182 | |
1783 | 2183 int _creation_mileage; // method mileage at MDO creation |
2184 | |
2185 // How many invocations has this MDO seen? | |
2186 // These counters are used to determine the exact age of MDO. | |
2187 // We need those because in tiered a method can be concurrently | |
2188 // executed at different levels. | |
2189 InvocationCounter _invocation_counter; | |
2190 // Same for backedges. | |
2191 InvocationCounter _backedge_counter; | |
2252 | 2192 // Counter values at the time profiling started. |
2193 int _invocation_counter_start; | |
2194 int _backedge_counter_start; | |
1783 | 2195 // Number of loops and blocks is computed when compiling the first |
2196 // time with C1. It is used to determine if method is trivial. | |
2197 short _num_loops; | |
2198 short _num_blocks; | |
2199 // Highest compile level this method has ever seen. | |
2200 u1 _highest_comp_level; | |
2201 // Same for OSR level | |
2202 u1 _highest_osr_comp_level; | |
2203 // Does this method contain anything worth profiling? | |
2204 bool _would_profile; | |
0 | 2205 |
2206 // Size of _data array in bytes. (Excludes header and extra_data fields.) | |
2207 int _data_size; | |
2208 | |
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2209 // data index for the area dedicated to parameters. -1 if no |
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2210 // parameter profiling. |
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2211 int _parameters_type_data_di; |
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2212 |
0 | 2213 // Beginning of the data entries |
2214 intptr_t _data[1]; | |
2215 | |
2216 // Helper for size computation | |
2217 static int compute_data_size(BytecodeStream* stream); | |
2218 static int bytecode_cell_count(Bytecodes::Code code); | |
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2219 static bool is_speculative_trap_bytecode(Bytecodes::Code code); |
0 | 2220 enum { no_profile_data = -1, variable_cell_count = -2 }; |
2221 | |
2222 // Helper for initialization | |
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2223 DataLayout* data_layout_at(int data_index) const { |
0 | 2224 assert(data_index % sizeof(intptr_t) == 0, "unaligned"); |
2225 return (DataLayout*) (((address)_data) + data_index); | |
2226 } | |
2227 | |
2228 // Initialize an individual data segment. Returns the size of | |
2229 // the segment in bytes. | |
2230 int initialize_data(BytecodeStream* stream, int data_index); | |
2231 | |
2232 // Helper for data_at | |
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2233 DataLayout* limit_data_position() const { |
0 | 2234 return (DataLayout*)((address)data_base() + _data_size); |
2235 } | |
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2236 bool out_of_bounds(int data_index) const { |
0 | 2237 return data_index >= data_size(); |
2238 } | |
2239 | |
2240 // Give each of the data entries a chance to perform specific | |
2241 // data initialization. | |
2242 void post_initialize(BytecodeStream* stream); | |
2243 | |
2244 // hint accessors | |
2245 int hint_di() const { return _hint_di; } | |
2246 void set_hint_di(int di) { | |
2247 assert(!out_of_bounds(di), "hint_di out of bounds"); | |
2248 _hint_di = di; | |
2249 } | |
2250 ProfileData* data_before(int bci) { | |
2251 // avoid SEGV on this edge case | |
2252 if (data_size() == 0) | |
2253 return NULL; | |
2254 int hint = hint_di(); | |
2255 if (data_layout_at(hint)->bci() <= bci) | |
2256 return data_at(hint); | |
2257 return first_data(); | |
2258 } | |
2259 | |
2260 // What is the index of the first data entry? | |
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2261 int first_di() const { return 0; } |
0 | 2262 |
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2263 ProfileData* bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp); |
0 | 2264 // Find or create an extra ProfileData: |
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2265 ProfileData* bci_to_extra_data(int bci, Method* m, bool create_if_missing); |
0 | 2266 |
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2267 // return the argument info cell |
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2268 ArgInfoData *arg_info(); |
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2269 |
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2270 enum { |
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2271 no_type_profile = 0, |
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2272 type_profile_jsr292 = 1, |
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2273 type_profile_all = 2 |
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2274 }; |
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2275 |
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2276 static bool profile_jsr292(methodHandle m, int bci); |
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2277 static int profile_arguments_flag(); |
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2278 static bool profile_arguments_jsr292_only(); |
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2279 static bool profile_all_arguments(); |
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2280 static bool profile_arguments_for_invoke(methodHandle m, int bci); |
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2281 static int profile_return_flag(); |
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2282 static bool profile_all_return(); |
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2283 static bool profile_return_for_invoke(methodHandle m, int bci); |
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2284 static int profile_parameters_flag(); |
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|
2285 static bool profile_parameters_jsr292_only(); |
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2286 static bool profile_all_parameters(); |
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2287 |
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2288 void clean_extra_data(BoolObjectClosure* is_alive); |
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2289 void clean_extra_data_helper(DataLayout* dp, int shift, bool reset = false); |
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2290 void verify_extra_data_clean(BoolObjectClosure* is_alive); |
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2291 |
0 | 2292 public: |
2293 static int header_size() { | |
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2294 return sizeof(MethodData)/wordSize; |
0 | 2295 } |
2296 | |
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2297 // Compute the size of a MethodData* before it is created. |
0 | 2298 static int compute_allocation_size_in_bytes(methodHandle method); |
2299 static int compute_allocation_size_in_words(methodHandle method); | |
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2300 static int compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps); |
0 | 2301 |
2302 // Determine if a given bytecode can have profile information. | |
2303 static bool bytecode_has_profile(Bytecodes::Code code) { | |
2304 return bytecode_cell_count(code) != no_profile_data; | |
2305 } | |
2306 | |
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2307 // reset into original state |
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2308 void init(); |
0 | 2309 |
2310 // My size | |
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2311 int size_in_bytes() const { return _size; } |
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2312 int size() const { return align_object_size(align_size_up(_size, BytesPerWord)/BytesPerWord); } |
7956 | 2313 #if INCLUDE_SERVICES |
2314 void collect_statistics(KlassSizeStats *sz) const; | |
2315 #endif | |
0 | 2316 |
2317 int creation_mileage() const { return _creation_mileage; } | |
2318 void set_creation_mileage(int x) { _creation_mileage = x; } | |
1783 | 2319 |
2320 int invocation_count() { | |
2321 if (invocation_counter()->carry()) { | |
2322 return InvocationCounter::count_limit; | |
2323 } | |
2324 return invocation_counter()->count(); | |
2325 } | |
2326 int backedge_count() { | |
2327 if (backedge_counter()->carry()) { | |
2328 return InvocationCounter::count_limit; | |
2329 } | |
2330 return backedge_counter()->count(); | |
2331 } | |
2332 | |
2252 | 2333 int invocation_count_start() { |
2334 if (invocation_counter()->carry()) { | |
2335 return 0; | |
2336 } | |
2337 return _invocation_counter_start; | |
2338 } | |
2339 | |
2340 int backedge_count_start() { | |
2341 if (backedge_counter()->carry()) { | |
2342 return 0; | |
2343 } | |
2344 return _backedge_counter_start; | |
2345 } | |
2346 | |
2347 int invocation_count_delta() { return invocation_count() - invocation_count_start(); } | |
2348 int backedge_count_delta() { return backedge_count() - backedge_count_start(); } | |
2349 | |
2350 void reset_start_counters() { | |
2351 _invocation_counter_start = invocation_count(); | |
2352 _backedge_counter_start = backedge_count(); | |
2353 } | |
2354 | |
1783 | 2355 InvocationCounter* invocation_counter() { return &_invocation_counter; } |
2356 InvocationCounter* backedge_counter() { return &_backedge_counter; } | |
2357 | |
2358 void set_would_profile(bool p) { _would_profile = p; } | |
2359 bool would_profile() const { return _would_profile; } | |
2360 | |
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2361 int highest_comp_level() const { return _highest_comp_level; } |
1783 | 2362 void set_highest_comp_level(int level) { _highest_comp_level = level; } |
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2363 int highest_osr_comp_level() const { return _highest_osr_comp_level; } |
1783 | 2364 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = level; } |
2365 | |
2366 int num_loops() const { return _num_loops; } | |
2367 void set_num_loops(int n) { _num_loops = n; } | |
2368 int num_blocks() const { return _num_blocks; } | |
2369 void set_num_blocks(int n) { _num_blocks = n; } | |
2370 | |
0 | 2371 bool is_mature() const; // consult mileage and ProfileMaturityPercentage |
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2372 static int mileage_of(Method* m); |
0 | 2373 |
2374 // Support for interprocedural escape analysis, from Thomas Kotzmann. | |
2375 enum EscapeFlag { | |
2376 estimated = 1 << 0, | |
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2377 return_local = 1 << 1, |
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2378 return_allocated = 1 << 2, |
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2379 allocated_escapes = 1 << 3, |
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2380 unknown_modified = 1 << 4 |
0 | 2381 }; |
2382 | |
2383 intx eflags() { return _eflags; } | |
2384 intx arg_local() { return _arg_local; } | |
2385 intx arg_stack() { return _arg_stack; } | |
2386 intx arg_returned() { return _arg_returned; } | |
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2387 uint arg_modified(int a) { ArgInfoData *aid = arg_info(); |
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2388 assert(aid != NULL, "arg_info must be not null"); |
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2389 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2390 return aid->arg_modified(a); } |
0 | 2391 |
2392 void set_eflags(intx v) { _eflags = v; } | |
2393 void set_arg_local(intx v) { _arg_local = v; } | |
2394 void set_arg_stack(intx v) { _arg_stack = v; } | |
2395 void set_arg_returned(intx v) { _arg_returned = v; } | |
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2396 void set_arg_modified(int a, uint v) { ArgInfoData *aid = arg_info(); |
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2397 assert(aid != NULL, "arg_info must be not null"); |
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2398 assert(a >= 0 && a < aid->number_of_args(), "valid argument number"); |
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2399 aid->set_arg_modified(a, v); } |
0 | 2400 |
2401 void clear_escape_info() { _eflags = _arg_local = _arg_stack = _arg_returned = 0; } | |
2402 | |
2403 // Location and size of data area | |
2404 address data_base() const { | |
2405 return (address) _data; | |
2406 } | |
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2407 int data_size() const { |
0 | 2408 return _data_size; |
2409 } | |
2410 | |
2411 // Accessors | |
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2412 Method* method() const { return _method; } |
0 | 2413 |
2414 // Get the data at an arbitrary (sort of) data index. | |
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2415 ProfileData* data_at(int data_index) const; |
0 | 2416 |
2417 // Walk through the data in order. | |
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2418 ProfileData* first_data() const { return data_at(first_di()); } |
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2419 ProfileData* next_data(ProfileData* current) const; |
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2420 bool is_valid(ProfileData* current) const { return current != NULL; } |
0 | 2421 |
2422 // Convert a dp (data pointer) to a di (data index). | |
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2423 int dp_to_di(address dp) const { |
0 | 2424 return dp - ((address)_data); |
2425 } | |
2426 | |
2427 address di_to_dp(int di) { | |
2428 return (address)data_layout_at(di); | |
2429 } | |
2430 | |
2431 // bci to di/dp conversion. | |
2432 address bci_to_dp(int bci); | |
2433 int bci_to_di(int bci) { | |
2434 return dp_to_di(bci_to_dp(bci)); | |
2435 } | |
2436 | |
2437 // Get the data at an arbitrary bci, or NULL if there is none. | |
2438 ProfileData* bci_to_data(int bci); | |
2439 | |
2440 // Same, but try to create an extra_data record if one is needed: | |
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2441 ProfileData* allocate_bci_to_data(int bci, Method* m) { |
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2442 ProfileData* data = NULL; |
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2443 // If m not NULL, try to allocate a SpeculativeTrapData entry |
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2444 if (m == NULL) { |
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2445 data = bci_to_data(bci); |
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2446 } |
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2447 if (data != NULL) { |
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|
2448 return data; |
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2449 } |
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2450 data = bci_to_extra_data(bci, m, true); |
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2451 if (data != NULL) { |
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|
2452 return data; |
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|
2453 } |
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2454 // If SpeculativeTrapData allocation fails try to allocate a |
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2455 // regular entry |
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2456 data = bci_to_data(bci); |
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2457 if (data != NULL) { |
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|
2458 return data; |
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|
2459 } |
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2460 return bci_to_extra_data(bci, NULL, true); |
0 | 2461 } |
2462 | |
2463 // Add a handful of extra data records, for trap tracking. | |
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2464 DataLayout* extra_data_base() const { return limit_data_position(); } |
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2465 DataLayout* extra_data_limit() const { return (DataLayout*)((address)this + size_in_bytes()); } |
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2466 int extra_data_size() const { return (address)extra_data_limit() |
0 | 2467 - (address)extra_data_base(); } |
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2468 static DataLayout* next_extra(DataLayout* dp); |
0 | 2469 |
2470 // Return (uint)-1 for overflow. | |
2471 uint trap_count(int reason) const { | |
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2472 assert((uint)reason < GRAAL_ONLY(2*) _trap_hist_limit, "oob"); |
0 | 2473 return (int)((_trap_hist._array[reason]+1) & _trap_hist_mask) - 1; |
2474 } | |
2475 // For loops: | |
2476 static uint trap_reason_limit() { return _trap_hist_limit; } | |
2477 static uint trap_count_limit() { return _trap_hist_mask; } | |
2478 uint inc_trap_count(int reason) { | |
2479 // Count another trap, anywhere in this method. | |
2480 assert(reason >= 0, "must be single trap"); | |
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2481 assert((uint)reason < GRAAL_ONLY(2*) _trap_hist_limit, "oob"); |
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|
2482 uint cnt1 = 1 + _trap_hist._array[reason]; |
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2483 if ((cnt1 & _trap_hist_mask) != 0) { // if no counter overflow... |
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|
2484 _trap_hist._array[reason] = cnt1; |
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2485 return cnt1; |
0 | 2486 } else { |
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2487 return _trap_hist_mask + (++_nof_overflow_traps); |
0 | 2488 } |
2489 } | |
2490 | |
2491 uint overflow_trap_count() const { | |
2492 return _nof_overflow_traps; | |
2493 } | |
2494 uint overflow_recompile_count() const { | |
2495 return _nof_overflow_recompiles; | |
2496 } | |
2497 void inc_overflow_recompile_count() { | |
2498 _nof_overflow_recompiles += 1; | |
2499 } | |
2500 uint decompile_count() const { | |
2501 return _nof_decompiles; | |
2502 } | |
2503 void inc_decompile_count() { | |
2504 _nof_decompiles += 1; | |
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2505 if (decompile_count() > (uint)PerMethodRecompilationCutoff) { |
7998 | 2506 method()->set_not_compilable(CompLevel_full_optimization, true, "decompile_count > PerMethodRecompilationCutoff"); |
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2507 } |
0 | 2508 } |
2509 | |
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2510 // Return pointer to area dedicated to parameters in MDO |
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2511 ParametersTypeData* parameters_type_data() const { |
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2512 return _parameters_type_data_di != -1 ? data_layout_at(_parameters_type_data_di)->data_in()->as_ParametersTypeData() : NULL; |
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2513 } |
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2514 |
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2515 int parameters_type_data_di() const { |
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2516 assert(_parameters_type_data_di != -1, "no args type data"); |
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2517 return _parameters_type_data_di; |
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2518 } |
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2519 |
0 | 2520 // Support for code generation |
2521 static ByteSize data_offset() { | |
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2522 return byte_offset_of(MethodData, _data[0]); |
0 | 2523 } |
2524 | |
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2525 static ByteSize trap_history_offset() { |
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2526 return byte_offset_of(MethodData, _trap_hist._array); |
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2527 } |
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2528 |
1783 | 2529 static ByteSize invocation_counter_offset() { |
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2530 return byte_offset_of(MethodData, _invocation_counter); |
1783 | 2531 } |
2532 static ByteSize backedge_counter_offset() { | |
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2533 return byte_offset_of(MethodData, _backedge_counter); |
1783 | 2534 } |
2535 | |
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2536 static ByteSize parameters_type_data_di_offset() { |
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2537 return byte_offset_of(MethodData, _parameters_type_data_di); |
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2538 } |
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2539 |
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2540 // Deallocation support - no pointer fields to deallocate |
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2541 void deallocate_contents(ClassLoaderData* loader_data) {} |
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2542 |
0 | 2543 // GC support |
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2544 void set_size(int object_size_in_bytes) { _size = object_size_in_bytes; } |
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2545 |
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2546 // Printing |
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2547 #ifndef PRODUCT |
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2548 void print_on (outputStream* st) const; |
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2549 #endif |
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2550 void print_value_on(outputStream* st) const; |
0 | 2551 |
2552 #ifndef PRODUCT | |
2553 // printing support for method data | |
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2554 void print_data_on(outputStream* st) const; |
0 | 2555 #endif |
2556 | |
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2557 const char* internal_name() const { return "{method data}"; } |
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2558 |
0 | 2559 // verification |
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2560 void verify_on(outputStream* st); |
0 | 2561 void verify_data_on(outputStream* st); |
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2562 |
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2563 static bool profile_parameters_for_method(methodHandle m); |
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2564 static bool profile_arguments(); |
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2565 static bool profile_return(); |
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2566 static bool profile_parameters(); |
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2567 static bool profile_return_jsr292_only(); |
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2568 |
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2569 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 2570 }; |
1972 | 2571 |
2572 #endif // SHARE_VM_OOPS_METHODDATAOOP_HPP |