Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 17915:e0a77b91da68
8040085: dtrace/jsdt tests crash on solaris. found an unadvertised bad scavengable oop in the code cache
Summary: Add CodeCache::add_scavenge_root_nmethod(this) to the dtrace-constructor of nmethod
Reviewed-by: roland, iveresov
author | anoll |
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date | Mon, 28 Apr 2014 12:39:12 +0200 |
parents | 62c54fcc0a35 |
children | 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
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28 #include "code/dependencies.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
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32 #include "compiler/compileBroker.hpp" |
1972 | 33 #include "compiler/compileLog.hpp" |
34 #include "compiler/compilerOracle.hpp" | |
35 #include "compiler/disassembler.hpp" | |
36 #include "interpreter/bytecode.hpp" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
1972 | 40 #include "runtime/sharedRuntime.hpp" |
41 #include "runtime/sweeper.hpp" | |
42 #include "utilities/dtrace.hpp" | |
43 #include "utilities/events.hpp" | |
44 #include "utilities/xmlstream.hpp" | |
45 #ifdef SHARK | |
46 #include "shark/sharkCompiler.hpp" | |
47 #endif | |
0 | 48 |
49 #ifdef DTRACE_ENABLED | |
50 | |
51 // Only bother with this argument setup if dtrace is available | |
52 | |
4006 | 53 #ifndef USDT2 |
0 | 54 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
55 const char*, int, const char*, int, const char*, int, void*, size_t); | |
56 | |
57 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
58 char*, int, char*, int, char*, int); | |
59 | |
60 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
61 { \ | |
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62 Method* m = (method); \ |
0 | 63 if (m != NULL) { \ |
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64 Symbol* klass_name = m->klass_name(); \ |
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65 Symbol* name = m->name(); \ |
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66 Symbol* signature = m->signature(); \ |
0 | 67 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
68 klass_name->bytes(), klass_name->utf8_length(), \ | |
69 name->bytes(), name->utf8_length(), \ | |
70 signature->bytes(), signature->utf8_length()); \ | |
71 } \ | |
72 } | |
4006 | 73 #else /* USDT2 */ |
74 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
75 { \ | |
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76 Method* m = (method); \ |
4006 | 77 if (m != NULL) { \ |
78 Symbol* klass_name = m->klass_name(); \ | |
79 Symbol* name = m->name(); \ | |
80 Symbol* signature = m->signature(); \ | |
81 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
82 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
83 (char *) name->bytes(), name->utf8_length(), \ | |
84 (char *) signature->bytes(), signature->utf8_length()); \ | |
85 } \ | |
86 } | |
87 #endif /* USDT2 */ | |
0 | 88 |
89 #else // ndef DTRACE_ENABLED | |
90 | |
91 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
92 | |
93 #endif | |
94 | |
95 bool nmethod::is_compiled_by_c1() const { | |
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96 if (compiler() == NULL) { |
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97 return false; |
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98 } |
0 | 99 return compiler()->is_c1(); |
100 } | |
101 bool nmethod::is_compiled_by_c2() const { | |
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102 if (compiler() == NULL) { |
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103 return false; |
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104 } |
0 | 105 return compiler()->is_c2(); |
106 } | |
1692 | 107 bool nmethod::is_compiled_by_shark() const { |
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108 if (compiler() == NULL) { |
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109 return false; |
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110 } |
1692 | 111 return compiler()->is_shark(); |
112 } | |
0 | 113 |
114 | |
115 | |
116 //--------------------------------------------------------------------------------- | |
117 // NMethod statistics | |
118 // They are printed under various flags, including: | |
119 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
120 // (In the latter two cases, they like other stats are printed to the log only.) | |
121 | |
122 #ifndef PRODUCT | |
123 // These variables are put into one block to reduce relocations | |
124 // and make it simpler to print from the debugger. | |
125 static | |
126 struct nmethod_stats_struct { | |
127 int nmethod_count; | |
128 int total_size; | |
129 int relocation_size; | |
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130 int consts_size; |
1748 | 131 int insts_size; |
0 | 132 int stub_size; |
133 int scopes_data_size; | |
134 int scopes_pcs_size; | |
135 int dependencies_size; | |
136 int handler_table_size; | |
137 int nul_chk_table_size; | |
138 int oops_size; | |
139 | |
140 void note_nmethod(nmethod* nm) { | |
141 nmethod_count += 1; | |
142 total_size += nm->size(); | |
143 relocation_size += nm->relocation_size(); | |
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144 consts_size += nm->consts_size(); |
1748 | 145 insts_size += nm->insts_size(); |
0 | 146 stub_size += nm->stub_size(); |
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147 oops_size += nm->oops_size(); |
0 | 148 scopes_data_size += nm->scopes_data_size(); |
149 scopes_pcs_size += nm->scopes_pcs_size(); | |
150 dependencies_size += nm->dependencies_size(); | |
151 handler_table_size += nm->handler_table_size(); | |
152 nul_chk_table_size += nm->nul_chk_table_size(); | |
153 } | |
154 void print_nmethod_stats() { | |
155 if (nmethod_count == 0) return; | |
156 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
157 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
158 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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159 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 160 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 161 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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162 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 163 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
164 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
165 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
166 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
167 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
168 } | |
169 | |
170 int native_nmethod_count; | |
171 int native_total_size; | |
172 int native_relocation_size; | |
1748 | 173 int native_insts_size; |
0 | 174 int native_oops_size; |
175 void note_native_nmethod(nmethod* nm) { | |
176 native_nmethod_count += 1; | |
177 native_total_size += nm->size(); | |
178 native_relocation_size += nm->relocation_size(); | |
1748 | 179 native_insts_size += nm->insts_size(); |
0 | 180 native_oops_size += nm->oops_size(); |
181 } | |
182 void print_native_nmethod_stats() { | |
183 if (native_nmethod_count == 0) return; | |
184 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
185 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
186 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 187 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 188 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
189 } | |
190 | |
191 int pc_desc_resets; // number of resets (= number of caches) | |
192 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
193 int pc_desc_approx; // number of those which have approximate true | |
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194 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 195 int pc_desc_hits; // number of LRU cache hits |
196 int pc_desc_tests; // total number of PcDesc examinations | |
197 int pc_desc_searches; // total number of quasi-binary search steps | |
198 int pc_desc_adds; // number of LUR cache insertions | |
199 | |
200 void print_pc_stats() { | |
201 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
202 pc_desc_queries, | |
203 (double)(pc_desc_tests + pc_desc_searches) | |
204 / pc_desc_queries); | |
205 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
206 pc_desc_resets, | |
207 pc_desc_queries, pc_desc_approx, | |
208 pc_desc_repeats, pc_desc_hits, | |
209 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
210 } | |
211 } nmethod_stats; | |
212 #endif //PRODUCT | |
213 | |
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214 |
0 | 215 //--------------------------------------------------------------------------------- |
216 | |
217 | |
218 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
219 assert(pc != NULL, "Must be non null"); | |
220 assert(exception.not_null(), "Must be non null"); | |
221 assert(handler != NULL, "Must be non null"); | |
222 | |
223 _count = 0; | |
224 _exception_type = exception->klass(); | |
225 _next = NULL; | |
226 | |
227 add_address_and_handler(pc,handler); | |
228 } | |
229 | |
230 | |
231 address ExceptionCache::match(Handle exception, address pc) { | |
232 assert(pc != NULL,"Must be non null"); | |
233 assert(exception.not_null(),"Must be non null"); | |
234 if (exception->klass() == exception_type()) { | |
235 return (test_address(pc)); | |
236 } | |
237 | |
238 return NULL; | |
239 } | |
240 | |
241 | |
242 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
243 assert(exception.not_null(),"Must be non null"); | |
244 if (exception->klass() == exception_type() && count() < cache_size) { | |
245 return true; | |
246 } | |
247 return false; | |
248 } | |
249 | |
250 | |
251 address ExceptionCache::test_address(address addr) { | |
252 for (int i=0; i<count(); i++) { | |
253 if (pc_at(i) == addr) { | |
254 return handler_at(i); | |
255 } | |
256 } | |
257 return NULL; | |
258 } | |
259 | |
260 | |
261 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
262 if (test_address(addr) == handler) return true; | |
263 if (count() < cache_size) { | |
264 set_pc_at(count(),addr); | |
265 set_handler_at(count(), handler); | |
266 increment_count(); | |
267 return true; | |
268 } | |
269 return false; | |
270 } | |
271 | |
272 | |
273 // private method for handling exception cache | |
274 // These methods are private, and used to manipulate the exception cache | |
275 // directly. | |
276 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
277 ExceptionCache* ec = exception_cache(); | |
278 while (ec != NULL) { | |
279 if (ec->match_exception_with_space(exception)) { | |
280 return ec; | |
281 } | |
282 ec = ec->next(); | |
283 } | |
284 return NULL; | |
285 } | |
286 | |
287 | |
288 //----------------------------------------------------------------------------- | |
289 | |
290 | |
291 // Helper used by both find_pc_desc methods. | |
292 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
293 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
294 if (!approximate) | |
295 return pc->pc_offset() == pc_offset; | |
296 else | |
297 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
298 } | |
299 | |
300 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
301 if (initial_pc_desc == NULL) { | |
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302 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 303 return; |
304 } | |
305 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
306 // reset the cache by filling it with benign (non-null) values | |
307 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
308 for (int i = 0; i < cache_size; i++) | |
309 _pc_descs[i] = initial_pc_desc; | |
310 } | |
311 | |
312 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
313 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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314 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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315 |
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316 // Note: one might think that caching the most recently |
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317 // read value separately would be a win, but one would be |
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318 // wrong. When many threads are updating it, the cache |
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319 // line it's in would bounce between caches, negating |
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320 // any benefit. |
0 | 321 |
322 // In order to prevent race conditions do not load cache elements | |
323 // repeatedly, but use a local copy: | |
324 PcDesc* res; | |
325 | |
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326 // Step one: Check the most recently added value. |
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327 res = _pc_descs[0]; |
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328 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 329 if (match_desc(res, pc_offset, approximate)) { |
330 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
331 return res; | |
332 } | |
333 | |
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334 // Step two: Check the rest of the LRU cache. |
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335 for (int i = 1; i < cache_size; ++i) { |
0 | 336 res = _pc_descs[i]; |
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337 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 338 if (match_desc(res, pc_offset, approximate)) { |
339 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
340 return res; | |
341 } | |
342 } | |
343 | |
344 // Report failure. | |
345 return NULL; | |
346 } | |
347 | |
348 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
349 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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350 // Update the LRU cache by shifting pc_desc forward. |
0 | 351 for (int i = 0; i < cache_size; i++) { |
352 PcDesc* next = _pc_descs[i]; | |
353 _pc_descs[i] = pc_desc; | |
354 pc_desc = next; | |
355 } | |
356 } | |
357 | |
358 // adjust pcs_size so that it is a multiple of both oopSize and | |
359 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
360 // of oopSize, then 2*sizeof(PcDesc) is) | |
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361 static int adjust_pcs_size(int pcs_size) { |
0 | 362 int nsize = round_to(pcs_size, oopSize); |
363 if ((nsize % sizeof(PcDesc)) != 0) { | |
364 nsize = pcs_size + sizeof(PcDesc); | |
365 } | |
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366 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 367 return nsize; |
368 } | |
369 | |
370 //----------------------------------------------------------------------------- | |
371 | |
372 | |
373 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
374 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
375 assert(new_entry != NULL,"Must be non null"); | |
376 assert(new_entry->next() == NULL, "Must be null"); | |
377 | |
378 if (exception_cache() != NULL) { | |
379 new_entry->set_next(exception_cache()); | |
380 } | |
381 set_exception_cache(new_entry); | |
382 } | |
383 | |
384 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
385 ExceptionCache* prev = NULL; | |
386 ExceptionCache* curr = exception_cache(); | |
387 assert(curr != NULL, "nothing to remove"); | |
388 // find the previous and next entry of ec | |
389 while (curr != ec) { | |
390 prev = curr; | |
391 curr = curr->next(); | |
392 assert(curr != NULL, "ExceptionCache not found"); | |
393 } | |
394 // now: curr == ec | |
395 ExceptionCache* next = curr->next(); | |
396 if (prev == NULL) { | |
397 set_exception_cache(next); | |
398 } else { | |
399 prev->set_next(next); | |
400 } | |
401 delete curr; | |
402 } | |
403 | |
404 | |
405 // public method for accessing the exception cache | |
406 // These are the public access methods. | |
407 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
408 // We never grab a lock to read the exception cache, so we may | |
409 // have false negatives. This is okay, as it can only happen during | |
410 // the first few exception lookups for a given nmethod. | |
411 ExceptionCache* ec = exception_cache(); | |
412 while (ec != NULL) { | |
413 address ret_val; | |
414 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
415 return ret_val; | |
416 } | |
417 ec = ec->next(); | |
418 } | |
419 return NULL; | |
420 } | |
421 | |
422 | |
423 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
424 // There are potential race conditions during exception cache updates, so we | |
425 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 426 // we don't lock during reads, it is possible to have several threads attempt |
0 | 427 // to update the cache with the same data. We need to check for already inserted |
428 // copies of the current data before adding it. | |
429 | |
430 MutexLocker ml(ExceptionCache_lock); | |
431 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
432 | |
433 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
434 target_entry = new ExceptionCache(exception,pc,handler); | |
435 add_exception_cache_entry(target_entry); | |
436 } | |
437 } | |
438 | |
439 | |
440 //-------------end of code for ExceptionCache-------------- | |
441 | |
442 | |
443 int nmethod::total_size() const { | |
444 return | |
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445 consts_size() + |
1748 | 446 insts_size() + |
0 | 447 stub_size() + |
448 scopes_data_size() + | |
449 scopes_pcs_size() + | |
450 handler_table_size() + | |
451 nul_chk_table_size(); | |
452 } | |
453 | |
454 const char* nmethod::compile_kind() const { | |
455 if (is_osr_method()) return "osr"; | |
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456 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 457 return NULL; |
458 } | |
459 | |
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460 // Fill in default values for various flag fields |
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461 void nmethod::init_defaults() { |
13441 | 462 _state = in_use; |
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463 _marked_for_reclamation = 0; |
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464 _has_flushed_dependencies = 0; |
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465 _has_unsafe_access = 0; |
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466 _has_method_handle_invokes = 0; |
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467 _lazy_critical_native = 0; |
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468 _has_wide_vectors = 0; |
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469 _marked_for_deoptimization = 0; |
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470 _lock_count = 0; |
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471 _stack_traversal_mark = 0; |
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472 _unload_reported = false; // jvmti state |
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473 |
1726 | 474 #ifdef ASSERT |
475 _oops_are_stale = false; | |
476 #endif | |
477 | |
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478 _oops_do_mark_link = NULL; |
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479 _jmethod_id = NULL; |
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480 _osr_link = NULL; |
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481 _scavenge_root_link = NULL; |
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482 _scavenge_root_state = 0; |
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483 _compiler = NULL; |
17780 | 484 #if INCLUDE_RTM_OPT |
485 _rtm_state = NoRTM; | |
486 #endif | |
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487 #ifdef HAVE_DTRACE_H |
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488 _trap_offset = 0; |
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489 #endif // def HAVE_DTRACE_H |
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490 } |
0 | 491 |
492 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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493 int compile_id, |
0 | 494 CodeBuffer *code_buffer, |
495 int vep_offset, | |
496 int frame_complete, | |
497 int frame_size, | |
498 ByteSize basic_lock_owner_sp_offset, | |
499 ByteSize basic_lock_sp_offset, | |
500 OopMapSet* oop_maps) { | |
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501 code_buffer->finalize_oop_references(method); |
0 | 502 // create nmethod |
503 nmethod* nm = NULL; | |
504 { | |
505 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
506 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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507 CodeOffsets offsets; |
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508 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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509 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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510 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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511 compile_id, &offsets, |
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512 code_buffer, frame_size, |
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513 basic_lock_owner_sp_offset, |
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514 basic_lock_sp_offset, oop_maps); |
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515 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
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516 if (PrintAssembly && nm != NULL) { |
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517 Disassembler::decode(nm); |
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518 } |
0 | 519 } |
520 // verify nmethod | |
521 debug_only(if (nm) nm->verify();) // might block | |
522 | |
523 if (nm != NULL) { | |
524 nm->log_new_nmethod(); | |
525 } | |
526 | |
527 return nm; | |
528 } | |
529 | |
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530 #ifdef HAVE_DTRACE_H |
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531 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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532 CodeBuffer *code_buffer, |
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533 int vep_offset, |
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534 int trap_offset, |
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535 int frame_complete, |
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536 int frame_size) { |
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537 code_buffer->finalize_oop_references(method); |
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538 // create nmethod |
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539 nmethod* nm = NULL; |
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540 { |
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541 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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542 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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543 CodeOffsets offsets; |
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544 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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545 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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546 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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547 |
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548 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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549 &offsets, code_buffer, frame_size); |
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550 |
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551 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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552 if (PrintAssembly && nm != NULL) { |
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553 Disassembler::decode(nm); |
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554 } |
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555 } |
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556 // verify nmethod |
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557 debug_only(if (nm) nm->verify();) // might block |
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558 |
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559 if (nm != NULL) { |
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560 nm->log_new_nmethod(); |
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561 } |
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562 |
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563 return nm; |
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564 } |
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565 |
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566 #endif // def HAVE_DTRACE_H |
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567 |
0 | 568 nmethod* nmethod::new_nmethod(methodHandle method, |
569 int compile_id, | |
570 int entry_bci, | |
571 CodeOffsets* offsets, | |
572 int orig_pc_offset, | |
573 DebugInformationRecorder* debug_info, | |
574 Dependencies* dependencies, | |
575 CodeBuffer* code_buffer, int frame_size, | |
576 OopMapSet* oop_maps, | |
577 ExceptionHandlerTable* handler_table, | |
578 ImplicitExceptionTable* nul_chk_table, | |
579 AbstractCompiler* compiler, | |
580 int comp_level | |
581 ) | |
582 { | |
583 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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584 code_buffer->finalize_oop_references(method); |
0 | 585 // create nmethod |
586 nmethod* nm = NULL; | |
587 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
588 int nmethod_size = | |
589 allocation_size(code_buffer, sizeof(nmethod)) | |
590 + adjust_pcs_size(debug_info->pcs_size()) | |
591 + round_to(dependencies->size_in_bytes() , oopSize) | |
592 + round_to(handler_table->size_in_bytes(), oopSize) | |
593 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
594 + round_to(debug_info->data_size() , oopSize); | |
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595 |
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596 nm = new (nmethod_size) |
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597 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
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598 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
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599 oop_maps, |
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600 handler_table, |
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601 nul_chk_table, |
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602 compiler, |
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603 comp_level); |
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604 |
0 | 605 if (nm != NULL) { |
606 // To make dependency checking during class loading fast, record | |
607 // the nmethod dependencies in the classes it is dependent on. | |
608 // This allows the dependency checking code to simply walk the | |
609 // class hierarchy above the loaded class, checking only nmethods | |
610 // which are dependent on those classes. The slow way is to | |
611 // check every nmethod for dependencies which makes it linear in | |
612 // the number of methods compiled. For applications with a lot | |
613 // classes the slow way is too slow. | |
614 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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615 Klass* klass = deps.context_type(); |
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616 if (klass == NULL) { |
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617 continue; // ignore things like evol_method |
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618 } |
0 | 619 |
620 // record this nmethod as dependent on this klass | |
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621 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 622 } |
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623 NOT_PRODUCT(nmethod_stats.note_nmethod(nm)); |
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624 if (PrintAssembly || CompilerOracle::has_option_string(method, "PrintAssembly")) { |
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625 Disassembler::decode(nm); |
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626 } |
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627 } |
0 | 628 } |
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629 // Do verification and logging outside CodeCache_lock. |
0 | 630 if (nm != NULL) { |
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631 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet. |
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632 DEBUG_ONLY(nm->verify();) |
0 | 633 nm->log_new_nmethod(); |
634 } | |
635 return nm; | |
636 } | |
637 | |
638 | |
639 // For native wrappers | |
640 nmethod::nmethod( | |
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641 Method* method, |
0 | 642 int nmethod_size, |
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643 int compile_id, |
0 | 644 CodeOffsets* offsets, |
645 CodeBuffer* code_buffer, | |
646 int frame_size, | |
647 ByteSize basic_lock_owner_sp_offset, | |
648 ByteSize basic_lock_sp_offset, | |
649 OopMapSet* oop_maps ) | |
650 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
651 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 652 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
653 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 654 { |
655 { | |
656 debug_only(No_Safepoint_Verifier nsv;) | |
657 assert_locked_or_safepoint(CodeCache_lock); | |
658 | |
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659 init_defaults(); |
0 | 660 _method = method; |
661 _entry_bci = InvocationEntryBci; | |
662 // We have no exception handler or deopt handler make the | |
663 // values something that will never match a pc like the nmethod vtable entry | |
664 _exception_offset = 0; | |
665 _deoptimize_offset = 0; | |
1204 | 666 _deoptimize_mh_offset = 0; |
0 | 667 _orig_pc_offset = 0; |
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668 |
1748 | 669 _consts_offset = data_offset(); |
0 | 670 _stub_offset = data_offset(); |
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671 _oops_offset = data_offset(); |
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672 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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673 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 674 _scopes_pcs_offset = _scopes_data_offset; |
675 _dependencies_offset = _scopes_pcs_offset; | |
676 _handler_table_offset = _dependencies_offset; | |
677 _nul_chk_table_offset = _handler_table_offset; | |
678 _nmethod_end_offset = _nul_chk_table_offset; | |
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679 _compile_id = compile_id; |
0 | 680 _comp_level = CompLevel_none; |
1748 | 681 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
682 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 683 _osr_entry_point = NULL; |
684 _exception_cache = NULL; | |
685 _pc_desc_cache.reset_to(NULL); | |
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686 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
0 | 687 |
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688 code_buffer->copy_values_to(this); |
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689 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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690 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 691 Universe::heap()->register_nmethod(this); |
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692 } |
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693 debug_only(verify_scavenge_root_oops()); |
0 | 694 CodeCache::commit(this); |
695 } | |
696 | |
697 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
698 ttyLocker ttyl; // keep the following output all in one block | |
699 // This output goes directly to the tty, not the compiler log. | |
700 // To enable tools to match it up with the compilation activity, | |
701 // be sure to tag this tty output with the compile ID. | |
702 if (xtty != NULL) { | |
703 xtty->begin_head("print_native_nmethod"); | |
704 xtty->method(_method); | |
705 xtty->stamp(); | |
706 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
707 } | |
708 // print the header part first | |
709 print(); | |
710 // then print the requested information | |
711 if (PrintNativeNMethods) { | |
712 print_code(); | |
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713 if (oop_maps != NULL) { |
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714 oop_maps->print(); |
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715 } |
0 | 716 } |
717 if (PrintRelocations) { | |
718 print_relocations(); | |
719 } | |
720 if (xtty != NULL) { | |
721 xtty->tail("print_native_nmethod"); | |
722 } | |
723 } | |
724 } | |
725 | |
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726 // For dtrace wrappers |
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727 #ifdef HAVE_DTRACE_H |
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728 nmethod::nmethod( |
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729 Method* method, |
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730 int nmethod_size, |
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731 CodeOffsets* offsets, |
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732 CodeBuffer* code_buffer, |
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733 int frame_size) |
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734 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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735 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 736 _native_receiver_sp_offset(in_ByteSize(-1)), |
737 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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738 { |
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739 { |
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740 debug_only(No_Safepoint_Verifier nsv;) |
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741 assert_locked_or_safepoint(CodeCache_lock); |
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742 |
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743 init_defaults(); |
116
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744 _method = method; |
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745 _entry_bci = InvocationEntryBci; |
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746 // We have no exception handler or deopt handler make the |
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747 // values something that will never match a pc like the nmethod vtable entry |
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748 _exception_offset = 0; |
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749 _deoptimize_offset = 0; |
1204 | 750 _deoptimize_mh_offset = 0; |
1378
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751 _unwind_handler_offset = -1; |
116
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752 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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753 _orig_pc_offset = 0; |
1748 | 754 _consts_offset = data_offset(); |
116
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755 _stub_offset = data_offset(); |
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756 _oops_offset = data_offset(); |
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757 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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758 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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759 _scopes_pcs_offset = _scopes_data_offset; |
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760 _dependencies_offset = _scopes_pcs_offset; |
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761 _handler_table_offset = _dependencies_offset; |
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762 _nul_chk_table_offset = _handler_table_offset; |
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763 _nmethod_end_offset = _nul_chk_table_offset; |
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764 _compile_id = 0; // default |
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765 _comp_level = CompLevel_none; |
1748 | 766 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
767 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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768 _osr_entry_point = NULL; |
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769 _exception_cache = NULL; |
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770 _pc_desc_cache.reset_to(NULL); |
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771 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
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772 |
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773 code_buffer->copy_values_to(this); |
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774 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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775 CodeCache::add_scavenge_root_nmethod(this); |
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776 Universe::heap()->register_nmethod(this); |
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777 } |
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778 DEBUG_ONLY(verify_scavenge_root_oops();) |
116
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779 CodeCache::commit(this); |
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780 } |
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781 |
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782 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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783 ttyLocker ttyl; // keep the following output all in one block |
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784 // This output goes directly to the tty, not the compiler log. |
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785 // To enable tools to match it up with the compilation activity, |
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786 // be sure to tag this tty output with the compile ID. |
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787 if (xtty != NULL) { |
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788 xtty->begin_head("print_dtrace_nmethod"); |
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789 xtty->method(_method); |
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790 xtty->stamp(); |
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791 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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792 } |
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793 // print the header part first |
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794 print(); |
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795 // then print the requested information |
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796 if (PrintNMethods) { |
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797 print_code(); |
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798 } |
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799 if (PrintRelocations) { |
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800 print_relocations(); |
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801 } |
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802 if (xtty != NULL) { |
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803 xtty->tail("print_dtrace_nmethod"); |
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804 } |
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805 } |
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806 } |
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807 #endif // def HAVE_DTRACE_H |
0 | 808 |
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809 void* nmethod::operator new(size_t size, int nmethod_size) throw() { |
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810 // Not critical, may return null if there is too little continuous memory |
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811 return CodeCache::allocate(nmethod_size); |
0 | 812 } |
813 | |
814 nmethod::nmethod( | |
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815 Method* method, |
0 | 816 int nmethod_size, |
817 int compile_id, | |
818 int entry_bci, | |
819 CodeOffsets* offsets, | |
820 int orig_pc_offset, | |
821 DebugInformationRecorder* debug_info, | |
822 Dependencies* dependencies, | |
823 CodeBuffer *code_buffer, | |
824 int frame_size, | |
825 OopMapSet* oop_maps, | |
826 ExceptionHandlerTable* handler_table, | |
827 ImplicitExceptionTable* nul_chk_table, | |
828 AbstractCompiler* compiler, | |
829 int comp_level | |
830 ) | |
831 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
832 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 833 _native_receiver_sp_offset(in_ByteSize(-1)), |
834 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 835 { |
836 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
837 { | |
838 debug_only(No_Safepoint_Verifier nsv;) | |
839 assert_locked_or_safepoint(CodeCache_lock); | |
840 | |
1644
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841 init_defaults(); |
0 | 842 _method = method; |
1644
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843 _entry_bci = entry_bci; |
0 | 844 _compile_id = compile_id; |
845 _comp_level = comp_level; | |
846 _compiler = compiler; | |
847 _orig_pc_offset = orig_pc_offset; | |
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848 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
1748 | 849 |
850 // Section offsets | |
1762
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851 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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852 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 853 |
854 // Exception handler and deopt handler are in the stub section | |
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855 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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856 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 857 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
858 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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859 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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860 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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861 } else { |
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862 _deoptimize_mh_offset = -1; |
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863 } |
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864 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 865 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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866 } else { |
1748 | 867 _unwind_handler_offset = -1; |
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868 } |
1748 | 869 |
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870 _oops_offset = data_offset(); |
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871 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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872 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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873 |
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874 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 875 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
876 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
877 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
878 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
879 | |
1748 | 880 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
881 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
882 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 883 _exception_cache = NULL; |
884 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
885 | |
886 // Copy contents of ScopeDescRecorder to nmethod | |
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887 code_buffer->copy_values_to(this); |
0 | 888 debug_info->copy_to(this); |
889 dependencies->copy_to(this); | |
989
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890 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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891 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 892 Universe::heap()->register_nmethod(this); |
989
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893 } |
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894 debug_only(verify_scavenge_root_oops()); |
0 | 895 |
896 CodeCache::commit(this); | |
897 | |
898 // Copy contents of ExceptionHandlerTable to nmethod | |
899 handler_table->copy_to(this); | |
900 nul_chk_table->copy_to(this); | |
901 | |
902 // we use the information of entry points to find out if a method is | |
903 // static or non static | |
904 assert(compiler->is_c2() || | |
905 _method->is_static() == (entry_point() == _verified_entry_point), | |
906 " entry points must be same for static methods and vice versa"); | |
907 } | |
908 | |
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909 bool printnmethods = PrintNMethods |
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910 || CompilerOracle::should_print(_method) |
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911 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 912 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
913 print_nmethod(printnmethods); | |
914 } | |
915 } | |
916 | |
917 | |
918 // Print a short set of xml attributes to identify this nmethod. The | |
919 // output should be embedded in some other element. | |
920 void nmethod::log_identity(xmlStream* log) const { | |
921 log->print(" compile_id='%d'", compile_id()); | |
922 const char* nm_kind = compile_kind(); | |
923 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
924 if (compiler() != NULL) { | |
925 log->print(" compiler='%s'", compiler()->name()); | |
926 } | |
1783 | 927 if (TieredCompilation) { |
928 log->print(" level='%d'", comp_level()); | |
929 } | |
0 | 930 } |
931 | |
932 | |
933 #define LOG_OFFSET(log, name) \ | |
934 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
935 log->print(" " XSTR(name) "_offset='%d'" , \ | |
936 (intptr_t)name##_begin() - (intptr_t)this) | |
937 | |
938 | |
939 void nmethod::log_new_nmethod() const { | |
940 if (LogCompilation && xtty != NULL) { | |
941 ttyLocker ttyl; | |
942 HandleMark hm; | |
943 xtty->begin_elem("nmethod"); | |
944 log_identity(xtty); | |
1748 | 945 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 946 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
947 | |
948 LOG_OFFSET(xtty, relocation); | |
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949 LOG_OFFSET(xtty, consts); |
1748 | 950 LOG_OFFSET(xtty, insts); |
0 | 951 LOG_OFFSET(xtty, stub); |
952 LOG_OFFSET(xtty, scopes_data); | |
953 LOG_OFFSET(xtty, scopes_pcs); | |
954 LOG_OFFSET(xtty, dependencies); | |
955 LOG_OFFSET(xtty, handler_table); | |
956 LOG_OFFSET(xtty, nul_chk_table); | |
957 LOG_OFFSET(xtty, oops); | |
958 | |
959 xtty->method(method()); | |
960 xtty->stamp(); | |
961 xtty->end_elem(); | |
962 } | |
963 } | |
964 | |
965 #undef LOG_OFFSET | |
966 | |
967 | |
968 // Print out more verbose output usually for a newly created nmethod. | |
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969 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 970 if (st != NULL) { |
971 ttyLocker ttyl; | |
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972 if (WizardMode) { |
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973 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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974 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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975 } else { |
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976 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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977 } |
0 | 978 } |
979 } | |
980 | |
981 | |
982 void nmethod::print_nmethod(bool printmethod) { | |
983 ttyLocker ttyl; // keep the following output all in one block | |
984 if (xtty != NULL) { | |
985 xtty->begin_head("print_nmethod"); | |
986 xtty->stamp(); | |
987 xtty->end_head(); | |
988 } | |
989 // print the header part first | |
990 print(); | |
991 // then print the requested information | |
992 if (printmethod) { | |
993 print_code(); | |
994 print_pcs(); | |
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995 if (oop_maps()) { |
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996 oop_maps()->print(); |
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997 } |
0 | 998 } |
999 if (PrintDebugInfo) { | |
1000 print_scopes(); | |
1001 } | |
1002 if (PrintRelocations) { | |
1003 print_relocations(); | |
1004 } | |
1005 if (PrintDependencies) { | |
1006 print_dependencies(); | |
1007 } | |
1008 if (PrintExceptionHandlers) { | |
1009 print_handler_table(); | |
1010 print_nul_chk_table(); | |
1011 } | |
1012 if (xtty != NULL) { | |
1013 xtty->tail("print_nmethod"); | |
1014 } | |
1015 } | |
1016 | |
1017 | |
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1018 // Promote one word from an assembly-time handle to a live embedded oop. |
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1019 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1020 if (handle == NULL || |
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1021 // As a special case, IC oops are initialized to 1 or -1. |
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1022 handle == (jobject) Universe::non_oop_word()) { |
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1023 (*dest) = (oop) handle; |
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1024 } else { |
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1025 (*dest) = JNIHandles::resolve_non_null(handle); |
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1026 } |
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1027 } |
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1028 |
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1029 |
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1030 // Have to have the same name because it's called by a template |
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1031 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1032 int length = array->length(); |
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1033 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1034 oop* dest = oops_begin(); |
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1035 for (int index = 0 ; index < length; index++) { |
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1036 initialize_immediate_oop(&dest[index], array->at(index)); |
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1037 } |
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1038 |
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1039 // Now we can fix up all the oops in the code. We need to do this |
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1040 // in the code because the assembler uses jobjects as placeholders. |
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1041 // The code and relocations have already been initialized by the |
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1042 // CodeBlob constructor, so it is valid even at this early point to |
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1043 // iterate over relocations and patch the code. |
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1044 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1045 } |
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1046 |
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1047 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1048 int length = array->length(); |
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1049 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1050 Metadata** dest = metadata_begin(); |
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1051 for (int index = 0 ; index < length; index++) { |
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1052 dest[index] = array->at(index); |
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1053 } |
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1054 } |
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1055 |
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1056 bool nmethod::is_at_poll_return(address pc) { |
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1057 RelocIterator iter(this, pc, pc+1); |
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1058 while (iter.next()) { |
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1059 if (iter.type() == relocInfo::poll_return_type) |
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1060 return true; |
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1061 } |
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1062 return false; |
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1063 } |
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1064 |
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1065 |
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1066 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1067 RelocIterator iter(this, pc, pc+1); |
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1068 while (iter.next()) { |
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1069 relocInfo::relocType t = iter.type(); |
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1070 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1071 return true; |
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1072 } |
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1073 return false; |
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1074 } |
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1075 |
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1076 |
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1077 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1078 // re-patch all oop-bearing instructions, just in case some oops moved |
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1079 RelocIterator iter(this, begin, end); |
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1080 while (iter.next()) { |
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1081 if (iter.type() == relocInfo::oop_type) { |
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1082 oop_Relocation* reloc = iter.oop_reloc(); |
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1083 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1084 oop* dest = reloc->oop_addr(); |
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1085 initialize_immediate_oop(dest, (jobject) *dest); |
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1086 } |
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1087 // Refresh the oop-related bits of this instruction. |
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1088 reloc->fix_oop_relocation(); |
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1089 } else if (iter.type() == relocInfo::metadata_type) { |
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1090 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1091 reloc->fix_metadata_relocation(); |
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1092 } |
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1093 } |
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1094 } |
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1095 |
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1096 |
2375
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1097 void nmethod::verify_oop_relocations() { |
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1098 // Ensure sure that the code matches the current oop values |
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1099 RelocIterator iter(this, NULL, NULL); |
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1100 while (iter.next()) { |
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1101 if (iter.type() == relocInfo::oop_type) { |
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1102 oop_Relocation* reloc = iter.oop_reloc(); |
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1103 if (!reloc->oop_is_immediate()) { |
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1104 reloc->verify_oop_relocation(); |
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1105 } |
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1106 } |
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1107 } |
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1108 } |
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1109 |
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1110 |
0 | 1111 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1112 PcDesc* pd = pc_desc_at(pc); | |
1113 guarantee(pd != NULL, "scope must be present"); | |
1114 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1115 pd->obj_decode_offset(), pd->should_reexecute(), |
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1116 pd->return_oop()); |
0 | 1117 } |
1118 | |
1119 | |
1120 void nmethod::clear_inline_caches() { | |
1121 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1122 if (is_zombie()) { | |
1123 return; | |
1124 } | |
1125 | |
1126 RelocIterator iter(this); | |
1127 while (iter.next()) { | |
1128 iter.reloc()->clear_inline_cache(); | |
1129 } | |
1130 } | |
1131 | |
1132 | |
1133 void nmethod::cleanup_inline_caches() { | |
1134 | |
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1135 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1136 |
1137 // If the method is not entrant or zombie then a JMP is plastered over the | |
1138 // first few bytes. If an oop in the old code was there, that oop | |
1139 // should not get GC'd. Skip the first few bytes of oops on | |
1140 // not-entrant methods. | |
1141 address low_boundary = verified_entry_point(); | |
1142 if (!is_in_use()) { | |
1143 low_boundary += NativeJump::instruction_size; | |
1144 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1145 // This means that the low_boundary is going to be a little too high. | |
1146 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1147 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1148 } | |
1149 | |
1150 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1151 ResourceMark rm; | |
1152 RelocIterator iter(this, low_boundary); | |
1153 while(iter.next()) { | |
1154 switch(iter.type()) { | |
1155 case relocInfo::virtual_call_type: | |
1156 case relocInfo::opt_virtual_call_type: { | |
1157 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1158 // Ok, to lookup references to zombies here | |
1159 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1160 if( cb != NULL && cb->is_nmethod() ) { | |
1161 nmethod* nm = (nmethod*)cb; | |
1162 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1163 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1164 } |
1165 break; | |
1166 } | |
1167 case relocInfo::static_call_type: { | |
1168 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1169 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1170 if( cb != NULL && cb->is_nmethod() ) { | |
1171 nmethod* nm = (nmethod*)cb; | |
1172 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1173 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1174 } |
1175 break; | |
1176 } | |
1177 } | |
1178 } | |
1179 } | |
1180 | |
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1181 // This is a private interface with the sweeper. |
0 | 1182 void nmethod::mark_as_seen_on_stack() { |
12324
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1183 assert(is_alive(), "Must be an alive method"); |
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1184 // Set the traversal mark to ensure that the sweeper does 2 |
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1185 // cleaning passes before moving to zombie. |
0 | 1186 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1187 } | |
1188 | |
2342
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|
1189 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1190 // there are no activations on the stack, not in use by the VM, |
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|
1191 // and not in use by the ServiceThread) |
0 | 1192 bool nmethod::can_not_entrant_be_converted() { |
1193 assert(is_not_entrant(), "must be a non-entrant method"); | |
1194 | |
1195 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1196 // count can be greater than the stack traversal count before it hits the | |
1197 // nmethod for the second time. | |
2342
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1198 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1199 !is_locked_by_vm(); |
0 | 1200 } |
1201 | |
1202 void nmethod::inc_decompile_count() { | |
1783 | 1203 if (!is_compiled_by_c2()) return; |
0 | 1204 // Could be gated by ProfileTraps, but do not bother... |
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1205 Method* m = method(); |
0 | 1206 if (m == NULL) return; |
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1207 MethodData* mdo = m->method_data(); |
0 | 1208 if (mdo == NULL) return; |
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1209 // There is a benign race here. See comments in methodData.hpp. |
0 | 1210 mdo->inc_decompile_count(); |
1211 } | |
1212 | |
1213 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1214 | |
1215 post_compiled_method_unload(); | |
1216 | |
1217 // Since this nmethod is being unloaded, make sure that dependencies | |
1218 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1219 // indicate that this work is being done during a GC. | |
1220 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1221 assert(is_alive != NULL, "Should be non-NULL"); | |
1222 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1223 flush_dependencies(is_alive); | |
1224 | |
1225 // Break cycle between nmethod & method | |
1226 if (TraceClassUnloading && WizardMode) { | |
1227 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
6725
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1228 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1229 "), cause(" INTPTR_FORMAT ")", |
1230 this, (address)_method, (address)cause); | |
989
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1231 if (!Universe::heap()->is_gc_active()) |
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1232 cause->klass()->print(); |
0 | 1233 } |
941 | 1234 // Unlink the osr method, so we do not look this up again |
1235 if (is_osr_method()) { | |
1236 invalidate_osr_method(); | |
1237 } | |
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1238 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1239 // so we don't have to break the cycle. Note that it is possible to |
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1240 // have the Method* live here, in case we unload the nmethod because |
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1241 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1242 if (_method != NULL) { |
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1243 // OSR methods point to the Method*, but the Method* does not |
0 | 1244 // point back! |
1245 if (_method->code() == this) { | |
1246 _method->clear_code(); // Break a cycle | |
1247 } | |
1248 _method = NULL; // Clear the method of this dead nmethod | |
1249 } | |
1250 // Make the class unloaded - i.e., change state and notify sweeper | |
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1251 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1252 if (is_in_use()) { |
1253 // Transitioning directly from live to unloaded -- so | |
1254 // we need to force a cache clean-up; remember this | |
1255 // for later on. | |
1256 CodeCache::set_needs_cache_clean(true); | |
1257 } | |
1644
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1258 _state = unloaded; |
0 | 1259 |
1109
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1260 // Log the unloading. |
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|
1261 log_state_change(); |
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1262 |
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1263 // The Method* is gone at this point |
0 | 1264 assert(_method == NULL, "Tautology"); |
1265 | |
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1266 set_osr_link(NULL); |
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1267 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
13074
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1268 NMethodSweeper::report_state_change(this); |
0 | 1269 } |
1270 | |
1271 void nmethod::invalidate_osr_method() { | |
1272 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1273 // Remove from list of active nmethods | |
1274 if (method() != NULL) | |
6940
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1275 method()->method_holder()->remove_osr_nmethod(this); |
0 | 1276 // Set entry as invalid |
1277 _entry_bci = InvalidOSREntryBci; | |
1278 } | |
1279 | |
1109
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|
1280 void nmethod::log_state_change() const { |
0 | 1281 if (LogCompilation) { |
1282 if (xtty != NULL) { | |
1283 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1284 if (_state == unloaded) { |
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1285 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1286 os::current_thread_id()); |
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1287 } else { |
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1288 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1289 os::current_thread_id(), |
1644
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1290 (_state == zombie ? " zombie='1'" : "")); |
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1291 } |
0 | 1292 log_identity(xtty); |
1293 xtty->stamp(); | |
1294 xtty->end_elem(); | |
1295 } | |
1296 } | |
1644
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1297 if (PrintCompilation && _state != unloaded) { |
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1298 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1299 } |
1300 } | |
1301 | |
13074
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1302 /** |
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1303 * Common functionality for both make_not_entrant and make_zombie |
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1304 */ |
1141 | 1305 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1306 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1307 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1308 |
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1309 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1310 nmethodLocker nml(this); |
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1311 methodHandle the_method(method()); |
1726 | 1312 No_Safepoint_Verifier nsv; |
0 | 1313 |
12080 | 1314 // during patching, depending on the nmethod state we must notify the GC that |
1315 // code has been unloaded, unregistering it. We cannot do this right while | |
1316 // holding the Patching_lock because we need to use the CodeCache_lock. This | |
1317 // would be prone to deadlocks. | |
1318 // This flag is used to remember whether we need to later lock and unregister. | |
1319 bool nmethod_needs_unregister = false; | |
1320 | |
0 | 1321 { |
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1322 // invalidate osr nmethod before acquiring the patching lock since |
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1323 // they both acquire leaf locks and we don't want a deadlock. |
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1324 // This logic is equivalent to the logic below for patching the |
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1325 // verified entry point of regular methods. |
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1326 if (is_osr_method()) { |
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1327 // this effectively makes the osr nmethod not entrant |
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1328 invalidate_osr_method(); |
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1329 } |
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1330 |
0 | 1331 // Enter critical section. Does not block for safepoint. |
1332 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1333 |
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1334 if (_state == state) { |
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1335 // another thread already performed this transition so nothing |
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1336 // to do, but return false to indicate this. |
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1337 return false; |
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1338 } |
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1339 |
0 | 1340 // The caller can be calling the method statically or through an inline |
1341 // cache call. | |
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1342 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1343 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1344 SharedRuntime::get_handle_wrong_method_stub()); | |
1345 } | |
1346 | |
1644
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1347 if (is_in_use()) { |
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1348 // It's a true state change, so mark the method as decompiled. |
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1349 // Do it only for transition from alive. |
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1350 inc_decompile_count(); |
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1351 } |
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1352 |
12080 | 1353 // If the state is becoming a zombie, signal to unregister the nmethod with |
1354 // the heap. | |
1355 // This nmethod may have already been unloaded during a full GC. | |
1356 if ((state == zombie) && !is_unloaded()) { | |
1357 nmethod_needs_unregister = true; | |
1358 } | |
1359 | |
12324
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1360 // Must happen before state change. Otherwise we have a race condition in |
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1361 // nmethod::can_not_entrant_be_converted(). I.e., a method can immediately |
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1362 // transition its state from 'not_entrant' to 'zombie' without having to wait |
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1363 // for stack scanning. |
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1364 if (state == not_entrant) { |
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1365 mark_as_seen_on_stack(); |
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1366 OrderAccess::storestore(); |
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1367 } |
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1368 |
0 | 1369 // Change state |
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1370 _state = state; |
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1371 |
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1372 // Log the transition once |
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1373 log_state_change(); |
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1374 |
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1375 // Remove nmethod from method. |
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1376 // We need to check if both the _code and _from_compiled_code_entry_point |
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1377 // refer to this nmethod because there is a race in setting these two fields |
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1378 // in Method* as seen in bugid 4947125. |
1644
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1379 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1380 // could be flushed and the compiler and vtable stubs could still call |
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1381 // through it. |
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1382 if (method() != NULL && (method()->code() == this || |
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1383 method()->from_compiled_entry() == verified_entry_point())) { |
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1384 HandleMark hm; |
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1385 method()->clear_code(); |
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1386 } |
0 | 1387 } // leave critical region under Patching_lock |
1388 | |
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1389 // When the nmethod becomes zombie it is no longer alive so the |
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1390 // dependencies must be flushed. nmethods in the not_entrant |
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1391 // state will be flushed later when the transition to zombie |
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1392 // happens or they get unloaded. |
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1393 if (state == zombie) { |
1726 | 1394 { |
1395 // Flushing dependecies must be done before any possible | |
1396 // safepoint can sneak in, otherwise the oops used by the | |
1397 // dependency logic could have become stale. | |
1398 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
12080 | 1399 if (nmethod_needs_unregister) { |
1400 Universe::heap()->unregister_nmethod(this); | |
1401 } | |
1726 | 1402 flush_dependencies(NULL); |
1403 } | |
1644
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1404 |
2342
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1405 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1406 // event and it hasn't already been reported for this nmethod then |
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1407 // report it now. The event may have been reported earilier if the GC |
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1408 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1409 // we no longer go to a safepoint here. |
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1410 post_compiled_method_unload(); |
1726 | 1411 |
1412 #ifdef ASSERT | |
1413 // It's no longer safe to access the oops section since zombie | |
1414 // nmethods aren't scanned for GC. | |
1415 _oops_are_stale = true; | |
1416 #endif | |
12161
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1417 // the Method may be reclaimed by class unloading now that the |
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1418 // nmethod is in zombie state |
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1419 set_method(NULL); |
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1420 } else { |
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1421 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1422 } |
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1423 |
0 | 1424 if (TraceCreateZombies) { |
1425 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1426 } | |
1427 | |
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1428 NMethodSweeper::report_state_change(this); |
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1429 return true; |
0 | 1430 } |
1431 | |
1432 void nmethod::flush() { | |
1433 // Note that there are no valid oops in the nmethod anymore. | |
1434 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1435 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1436 | |
1437 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1438 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1439 |
1440 // completely deallocate this method | |
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1441 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1442 if (PrintMethodFlushing) { |
1202 | 1443 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1444 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1445 } |
1446 | |
1447 // We need to deallocate any ExceptionCache data. | |
1448 // Note that we do not need to grab the nmethod lock for this, it | |
1449 // better be thread safe if we're disposing of it! | |
1450 ExceptionCache* ec = exception_cache(); | |
1451 set_exception_cache(NULL); | |
1452 while(ec != NULL) { | |
1453 ExceptionCache* next = ec->next(); | |
1454 delete ec; | |
1455 ec = next; | |
1456 } | |
1457 | |
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1458 if (on_scavenge_root_list()) { |
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1459 CodeCache::drop_scavenge_root_nmethod(this); |
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1460 } |
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1461 |
1692 | 1462 #ifdef SHARK |
1845
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1463 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1464 #endif // SHARK |
1465 | |
0 | 1466 ((CodeBlob*)(this))->flush(); |
1467 | |
1468 CodeCache::free(this); | |
1469 } | |
1470 | |
1471 | |
1472 // | |
1473 // Notify all classes this nmethod is dependent on that it is no | |
1474 // longer dependent. This should only be called in two situations. | |
1475 // First, when a nmethod transitions to a zombie all dependents need | |
1476 // to be clear. Since zombification happens at a safepoint there's no | |
1477 // synchronization issues. The second place is a little more tricky. | |
1478 // During phase 1 of mark sweep class unloading may happen and as a | |
1479 // result some nmethods may get unloaded. In this case the flushing | |
1480 // of dependencies must happen during phase 1 since after GC any | |
1481 // dependencies in the unloaded nmethod won't be updated, so | |
1482 // traversing the dependency information in unsafe. In that case this | |
1483 // function is called with a non-NULL argument and this function only | |
1484 // notifies instanceKlasses that are reachable | |
1485 | |
1486 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1487 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1488 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1489 "is_alive is non-NULL if and only if we are called during GC"); | |
1490 if (!has_flushed_dependencies()) { | |
1491 set_has_flushed_dependencies(); | |
1492 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1493 Klass* klass = deps.context_type(); |
0 | 1494 if (klass == NULL) continue; // ignore things like evol_method |
1495 | |
1496 // During GC the is_alive closure is non-NULL, and is used to | |
1497 // determine liveness of dependees that need to be updated. | |
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1498 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1499 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1500 } |
1501 } | |
1502 } | |
1503 } | |
1504 | |
1505 | |
1506 // If this oop is not live, the nmethod can be unloaded. | |
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1507 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { |
0 | 1508 assert(root != NULL, "just checking"); |
1509 oop obj = *root; | |
1510 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1511 return false; | |
1512 } | |
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1513 |
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1514 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1515 // simply because one of its constant oops has gone dead. |
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1516 // No actual classes need to be unloaded in order for this to occur. |
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1517 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1518 make_unloaded(is_alive, obj); |
1519 return true; | |
1520 } | |
1521 | |
1522 // ------------------------------------------------------------------ | |
1523 // post_compiled_method_load_event | |
1524 // new method for install_code() path | |
1525 // Transfer information from compilation to jvmti | |
1526 void nmethod::post_compiled_method_load_event() { | |
1527 | |
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1528 Method* moop = method(); |
4006 | 1529 #ifndef USDT2 |
0 | 1530 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1531 moop->klass_name()->bytes(), | |
1532 moop->klass_name()->utf8_length(), | |
1533 moop->name()->bytes(), | |
1534 moop->name()->utf8_length(), | |
1535 moop->signature()->bytes(), | |
1536 moop->signature()->utf8_length(), | |
1748 | 1537 insts_begin(), insts_size()); |
4006 | 1538 #else /* USDT2 */ |
1539 HOTSPOT_COMPILED_METHOD_LOAD( | |
1540 (char *) moop->klass_name()->bytes(), | |
1541 moop->klass_name()->utf8_length(), | |
1542 (char *) moop->name()->bytes(), | |
1543 moop->name()->utf8_length(), | |
1544 (char *) moop->signature()->bytes(), | |
1545 moop->signature()->utf8_length(), | |
1546 insts_begin(), insts_size()); | |
1547 #endif /* USDT2 */ | |
0 | 1548 |
1616
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1549 if (JvmtiExport::should_post_compiled_method_load() || |
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1550 JvmtiExport::should_post_compiled_method_unload()) { |
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1551 get_and_cache_jmethod_id(); |
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1552 } |
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1553 |
0 | 1554 if (JvmtiExport::should_post_compiled_method_load()) { |
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1555 // Let the Service thread (which is a real Java thread) post the event |
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1556 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1557 JvmtiDeferredEventQueue::enqueue( |
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1558 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1559 } |
1560 } | |
1561 | |
1616
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1562 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1563 if (_jmethod_id == NULL) { |
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1564 // Cache the jmethod_id since it can no longer be looked up once the |
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1565 // method itself has been marked for unloading. |
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1566 _jmethod_id = method()->jmethod_id(); |
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1567 } |
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1568 return _jmethod_id; |
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1569 } |
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1570 |
0 | 1571 void nmethod::post_compiled_method_unload() { |
1577
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1572 if (unload_reported()) { |
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1573 // During unloading we transition to unloaded and then to zombie |
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1574 // and the unloading is reported during the first transition. |
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1575 return; |
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1576 } |
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1577 |
0 | 1578 assert(_method != NULL && !is_unloaded(), "just checking"); |
1579 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1580 | |
1581 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1582 // post the event. Sometime later this nmethod will be made a zombie |
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1583 // by the sweeper but the Method* will not be valid at that point. |
1616
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1584 // If the _jmethod_id is null then no load event was ever requested |
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1585 // so don't bother posting the unload. The main reason for this is |
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1586 // that the jmethodID is a weak reference to the Method* so if |
1616
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1587 // it's being unloaded there's no way to look it up since the weak |
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1588 // ref will have been cleared. |
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1589 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1590 assert(!unload_reported(), "already unloaded"); |
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1591 JvmtiDeferredEvent event = |
2342
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1592 JvmtiDeferredEvent::compiled_method_unload_event(this, |
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1593 _jmethod_id, insts_begin()); |
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1594 if (SafepointSynchronize::is_at_safepoint()) { |
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1595 // Don't want to take the queueing lock. Add it as pending and |
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1596 // it will get enqueued later. |
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1597 JvmtiDeferredEventQueue::add_pending_event(event); |
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1598 } else { |
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1599 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1600 JvmtiDeferredEventQueue::enqueue(event); |
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1601 } |
0 | 1602 } |
1603 | |
1604 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1605 // any time. As the nmethod is being unloaded now we mark it has | |
1606 // having the unload event reported - this will ensure that we don't | |
1607 // attempt to report the event in the unlikely scenario where the | |
1608 // event is enabled at the time the nmethod is made a zombie. | |
1609 set_unload_reported(); | |
1610 } | |
1611 | |
1612 // This is called at the end of the strong tracing/marking phase of a | |
1613 // GC to unload an nmethod if it contains otherwise unreachable | |
1614 // oops. | |
1615 | |
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1616 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 1617 // Make sure the oop's ready to receive visitors |
1618 assert(!is_zombie() && !is_unloaded(), | |
1619 "should not call follow on zombie or unloaded nmethod"); | |
1620 | |
1621 // If the method is not entrant then a JMP is plastered over the | |
1622 // first few bytes. If an oop in the old code was there, that oop | |
1623 // should not get GC'd. Skip the first few bytes of oops on | |
1624 // not-entrant methods. | |
1625 address low_boundary = verified_entry_point(); | |
1626 if (is_not_entrant()) { | |
1627 low_boundary += NativeJump::instruction_size; | |
1628 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1629 // (See comment above.) | |
1630 } | |
1631 | |
1632 // The RedefineClasses() API can cause the class unloading invariant | |
1633 // to no longer be true. See jvmtiExport.hpp for details. | |
1634 // Also, leave a debugging breadcrumb in local flag. | |
1635 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1636 if (a_class_was_redefined) { | |
1637 // This set of the unloading_occurred flag is done before the | |
1638 // call to post_compiled_method_unload() so that the unloading | |
1639 // of this nmethod is reported. | |
1640 unloading_occurred = true; | |
1641 } | |
1642 | |
1643 // Exception cache | |
1644 ExceptionCache* ec = exception_cache(); | |
1645 while (ec != NULL) { | |
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1646 Klass* ex_klass = ec->exception_type(); |
0 | 1647 ExceptionCache* next_ec = ec->next(); |
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1648 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1649 remove_from_exception_cache(ec); |
1650 } | |
1651 ec = next_ec; | |
1652 } | |
1653 | |
1654 // If class unloading occurred we first iterate over all inline caches and | |
1655 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1656 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1657 // iteration below. | |
1658 if (unloading_occurred) { | |
1659 RelocIterator iter(this, low_boundary); | |
1660 while(iter.next()) { | |
1661 if (iter.type() == relocInfo::virtual_call_type) { | |
1662 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1663 if (ic->is_icholder_call()) { |
0 | 1664 // The only exception is compiledICHolder oops which may |
1665 // yet be marked below. (We check this further below). | |
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1666 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1667 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1668 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
13441 | 1669 continue; |
1670 } | |
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1671 } else { |
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1672 Metadata* ic_oop = ic->cached_metadata(); |
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1673 if (ic_oop != NULL) { |
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1674 if (ic_oop->is_klass()) { |
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1675 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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1676 continue; |
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1677 } |
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1678 } else if (ic_oop->is_method()) { |
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1679 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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1680 continue; |
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1681 } |
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1682 } else { |
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1683 ShouldNotReachHere(); |
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1684 } |
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1685 } |
13441 | 1686 } |
1687 ic->set_to_clean(); | |
0 | 1688 } |
1689 } | |
1690 } | |
1691 | |
1692 // Compiled code | |
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1693 { |
0 | 1694 RelocIterator iter(this, low_boundary); |
1695 while (iter.next()) { | |
1696 if (iter.type() == relocInfo::oop_type) { | |
1697 oop_Relocation* r = iter.oop_reloc(); | |
1698 // In this loop, we must only traverse those oops directly embedded in | |
1699 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1700 assert(1 == (r->oop_is_immediate()) + | |
1701 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1702 "oop must be found in exactly one place"); | |
1703 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
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1704 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
0 | 1705 return; |
1706 } | |
1707 } | |
1708 } | |
1709 } | |
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1710 } |
0 | 1711 |
1712 | |
1713 // Scopes | |
1714 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1715 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
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1716 if (can_unload(is_alive, p, unloading_occurred)) { |
0 | 1717 return; |
1718 } | |
1719 } | |
1720 | |
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1721 // Ensure that all metadata is still alive |
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1722 verify_metadata_loaders(low_boundary, is_alive); |
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1723 } |
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1724 |
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1725 #ifdef ASSERT |
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1726 |
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1727 class CheckClass : AllStatic { |
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1728 static BoolObjectClosure* _is_alive; |
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1729 |
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1730 // Check class_loader is alive for this bit of metadata. |
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1731 static void check_class(Metadata* md) { |
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1732 Klass* klass = NULL; |
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1733 if (md->is_klass()) { |
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1734 klass = ((Klass*)md); |
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1735 } else if (md->is_method()) { |
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1736 klass = ((Method*)md)->method_holder(); |
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1737 } else if (md->is_methodData()) { |
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1738 klass = ((MethodData*)md)->method()->method_holder(); |
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1739 } else { |
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1740 md->print(); |
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1741 ShouldNotReachHere(); |
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1742 } |
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1743 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1744 } |
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1745 public: |
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1746 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1747 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1748 _is_alive = is_alive; |
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1749 nm->metadata_do(check_class); |
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1750 } |
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1751 }; |
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1752 |
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1753 // This is called during a safepoint so can use static data |
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1754 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1755 #endif // ASSERT |
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1756 |
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1757 |
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1758 // Processing of oop references should have been sufficient to keep |
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1759 // all strong references alive. Any weak references should have been |
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1760 // cleared as well. Visit all the metadata and ensure that it's |
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1761 // really alive. |
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1762 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1763 #ifdef ASSERT |
0 | 1764 RelocIterator iter(this, low_boundary); |
1765 while (iter.next()) { | |
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1766 // static_stub_Relocations may have dangling references to |
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1767 // Method*s so trim them out here. Otherwise it looks like |
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1768 // compiled code is maintaining a link to dead metadata. |
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1769 address static_call_addr = NULL; |
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1770 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1771 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1772 if (!cic->is_call_to_interpreted()) { |
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1773 static_call_addr = iter.addr(); |
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1774 } |
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1775 } else if (iter.type() == relocInfo::static_call_type) { |
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1776 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1777 if (!csc->is_call_to_interpreted()) { |
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1778 static_call_addr = iter.addr(); |
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1779 } |
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1780 } |
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1781 if (static_call_addr != NULL) { |
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1782 RelocIterator sciter(this, low_boundary); |
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1783 while (sciter.next()) { |
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1784 if (sciter.type() == relocInfo::static_stub_type && |
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1785 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1786 sciter.static_stub_reloc()->clear_inline_cache(); |
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1787 } |
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1788 } |
0 | 1789 } |
1790 } | |
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1791 // Check that the metadata embedded in the nmethod is alive |
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1792 CheckClass::do_check_class(is_alive, this); |
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1793 #endif |
0 | 1794 } |
1795 | |
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1796 |
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1797 // Iterate over metadata calling this function. Used by RedefineClasses |
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1798 void nmethod::metadata_do(void f(Metadata*)) { |
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1799 address low_boundary = verified_entry_point(); |
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1800 if (is_not_entrant()) { |
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1801 low_boundary += NativeJump::instruction_size; |
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1802 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1803 // (See comment above.) |
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1804 } |
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1805 { |
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1806 // Visit all immediate references that are embedded in the instruction stream. |
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1807 RelocIterator iter(this, low_boundary); |
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1808 while (iter.next()) { |
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1809 if (iter.type() == relocInfo::metadata_type ) { |
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1810 metadata_Relocation* r = iter.metadata_reloc(); |
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1811 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1812 // the code. Other metadatas (oop_index>0) are seen as part of |
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1813 // the metadata section below. |
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1814 assert(1 == (r->metadata_is_immediate()) + |
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1815 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1816 "metadata must be found in exactly one place"); |
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1817 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1818 Metadata* md = r->metadata_value(); |
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1819 f(md); |
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1820 } |
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1821 } else if (iter.type() == relocInfo::virtual_call_type) { |
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1822 // Check compiledIC holders associated with this nmethod |
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1823 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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1824 if (ic->is_icholder_call()) { |
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1825 CompiledICHolder* cichk = ic->cached_icholder(); |
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1826 f(cichk->holder_method()); |
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1827 f(cichk->holder_klass()); |
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1828 } else { |
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1829 Metadata* ic_oop = ic->cached_metadata(); |
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1830 if (ic_oop != NULL) { |
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1831 f(ic_oop); |
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1832 } |
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1833 } |
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1834 } |
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1835 } |
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1836 } |
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1837 |
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1838 // Visit the metadata section |
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1839 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1840 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1841 Metadata* md = *p; |
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1842 f(md); |
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1843 } |
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1844 |
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1845 // Call function Method*, not embedded in these other places. |
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1846 if (_method != NULL) f(_method); |
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1847 } |
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1848 |
12080 | 1849 void nmethod::oops_do(OopClosure* f, bool allow_zombie) { |
0 | 1850 // make sure the oops ready to receive visitors |
12080 | 1851 assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod"); |
1852 assert(!is_unloaded(), "should not call follow on unloaded nmethod"); | |
0 | 1853 |
1854 // If the method is not entrant or zombie then a JMP is plastered over the | |
1855 // first few bytes. If an oop in the old code was there, that oop | |
1856 // should not get GC'd. Skip the first few bytes of oops on | |
1857 // not-entrant methods. | |
1858 address low_boundary = verified_entry_point(); | |
1859 if (is_not_entrant()) { | |
1860 low_boundary += NativeJump::instruction_size; | |
1861 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1862 // (See comment above.) | |
1863 } | |
1864 | |
1865 RelocIterator iter(this, low_boundary); | |
941 | 1866 |
0 | 1867 while (iter.next()) { |
1868 if (iter.type() == relocInfo::oop_type ) { | |
1869 oop_Relocation* r = iter.oop_reloc(); | |
1870 // In this loop, we must only follow those oops directly embedded in | |
1871 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1872 assert(1 == (r->oop_is_immediate()) + |
1873 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1874 "oop must be found in exactly one place"); | |
0 | 1875 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1876 f->do_oop(r->oop_addr()); | |
1877 } | |
1878 } | |
1879 } | |
1880 | |
1881 // Scopes | |
989
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1882 // This includes oop constants not inlined in the code stream. |
0 | 1883 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1884 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1885 f->do_oop(p); | |
1886 } | |
1887 } | |
1888 | |
989
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1889 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1890 |
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1891 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1892 |
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1893 // An nmethod is "marked" if its _mark_link is set non-null. |
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1894 // Even if it is the end of the linked list, it will have a non-null link value, |
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1895 // as long as it is on the list. |
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1896 // This code must be MP safe, because it is used from parallel GC passes. |
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1897 bool nmethod::test_set_oops_do_mark() { |
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1898 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1899 nmethod* observed_mark_link = _oops_do_mark_link; |
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1900 if (observed_mark_link == NULL) { |
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1901 // Claim this nmethod for this thread to mark. |
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1902 observed_mark_link = (nmethod*) |
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1903 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1904 if (observed_mark_link == NULL) { |
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1905 |
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1906 // Atomically append this nmethod (now claimed) to the head of the list: |
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1907 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1908 for (;;) { |
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1909 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1910 _oops_do_mark_link = required_mark_nmethods; |
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1911 observed_mark_nmethods = (nmethod*) |
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1912 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1913 if (observed_mark_nmethods == required_mark_nmethods) |
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1914 break; |
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1915 } |
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1916 // Mark was clear when we first saw this guy. |
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1917 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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1918 return false; |
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1919 } |
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1920 } |
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1921 // On fall through, another racing thread marked this nmethod before we did. |
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1922 return true; |
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1923 } |
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1924 |
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1925 void nmethod::oops_do_marking_prologue() { |
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1926 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1927 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1928 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1929 // may fork a bunch of threads, and we need them all to see the same state. |
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1930 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1931 guarantee(observed == NULL, "no races in this sequential code"); |
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1932 } |
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1933 |
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1934 void nmethod::oops_do_marking_epilogue() { |
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1935 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1936 nmethod* cur = _oops_do_mark_nmethods; |
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1937 while (cur != NMETHOD_SENTINEL) { |
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1938 assert(cur != NULL, "not NULL-terminated"); |
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1939 nmethod* next = cur->_oops_do_mark_link; |
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1940 cur->_oops_do_mark_link = NULL; |
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1941 cur->fix_oop_relocations(); |
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1942 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
989
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1943 cur = next; |
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1944 } |
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1945 void* required = _oops_do_mark_nmethods; |
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1946 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1947 guarantee(observed == required, "no races in this sequential code"); |
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1948 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1949 } |
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1950 |
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1951 class DetectScavengeRoot: public OopClosure { |
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1952 bool _detected_scavenge_root; |
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1953 public: |
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1954 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1955 { NOT_PRODUCT(_print_nm = NULL); } |
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1956 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1957 virtual void do_oop(oop* p) { |
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1958 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1959 NOT_PRODUCT(maybe_print(p)); |
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1960 _detected_scavenge_root = true; |
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1961 } |
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1962 } |
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1963 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1964 |
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1965 #ifndef PRODUCT |
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1966 nmethod* _print_nm; |
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1967 void maybe_print(oop* p) { |
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1968 if (_print_nm == NULL) return; |
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1969 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1970 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1971 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1972 (void *)(*p), (intptr_t)p); |
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1973 (*p)->print(); |
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1974 } |
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1975 #endif //PRODUCT |
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1976 }; |
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1977 |
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1978 bool nmethod::detect_scavenge_root_oops() { |
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1979 DetectScavengeRoot detect_scavenge_root; |
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1980 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1981 oops_do(&detect_scavenge_root); |
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1982 return detect_scavenge_root.detected_scavenge_root(); |
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1983 } |
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1984 |
0 | 1985 // Method that knows how to preserve outgoing arguments at call. This method must be |
1986 // called with a frame corresponding to a Java invoke | |
1987 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1988 #ifndef SHARK |
0 | 1989 if (!method()->is_native()) { |
1990 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1991 Bytecode_invoke call(ssd.method(), ssd.bci()); |
10390 | 1992 bool has_receiver = call.has_receiver(); |
1993 bool has_appendix = call.has_appendix(); | |
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1994 Symbol* signature = call.signature(); |
10390 | 1995 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f); |
0 | 1996 } |
1692 | 1997 #endif // !SHARK |
0 | 1998 } |
1999 | |
2000 | |
2001 oop nmethod::embeddedOop_at(u_char* p) { | |
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2002 RelocIterator iter(this, p, p + 1); |
0 | 2003 while (iter.next()) |
2004 if (iter.type() == relocInfo::oop_type) { | |
2005 return iter.oop_reloc()->oop_value(); | |
2006 } | |
2007 return NULL; | |
2008 } | |
2009 | |
2010 | |
2011 inline bool includes(void* p, void* from, void* to) { | |
2012 return from <= p && p < to; | |
2013 } | |
2014 | |
2015 | |
2016 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
2017 assert(count >= 2, "must be sentinel values, at least"); | |
2018 | |
2019 #ifdef ASSERT | |
2020 // must be sorted and unique; we do a binary search in find_pc_desc() | |
2021 int prev_offset = pcs[0].pc_offset(); | |
2022 assert(prev_offset == PcDesc::lower_offset_limit, | |
2023 "must start with a sentinel"); | |
2024 for (int i = 1; i < count; i++) { | |
2025 int this_offset = pcs[i].pc_offset(); | |
2026 assert(this_offset > prev_offset, "offsets must be sorted"); | |
2027 prev_offset = this_offset; | |
2028 } | |
2029 assert(prev_offset == PcDesc::upper_offset_limit, | |
2030 "must end with a sentinel"); | |
2031 #endif //ASSERT | |
2032 | |
1135
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2033 // Search for MethodHandle invokes and tag the nmethod. |
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2034 for (int i = 0; i < count; i++) { |
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2035 if (pcs[i].is_method_handle_invoke()) { |
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2036 set_has_method_handle_invokes(true); |
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2037 break; |
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2038 } |
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2039 } |
2083
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2040 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2041 |
0 | 2042 int size = count * sizeof(PcDesc); |
2043 assert(scopes_pcs_size() >= size, "oob"); | |
2044 memcpy(scopes_pcs_begin(), pcs, size); | |
2045 | |
2046 // Adjust the final sentinel downward. | |
2047 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2048 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2049 last_pc->set_pc_offset(content_size() + 1); |
0 | 2050 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2051 // Fill any rounding gaps with copies of the last record. | |
2052 last_pc[1] = last_pc[0]; | |
2053 } | |
2054 // The following assert could fail if sizeof(PcDesc) is not | |
2055 // an integral multiple of oopSize (the rounding term). | |
2056 // If it fails, change the logic to always allocate a multiple | |
2057 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2058 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2059 } | |
2060 | |
2061 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2062 assert(scopes_data_size() >= size, "oob"); | |
2063 memcpy(scopes_data_begin(), buffer, size); | |
2064 } | |
2065 | |
2066 | |
2067 #ifdef ASSERT | |
2068 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2069 PcDesc* lower = nm->scopes_pcs_begin(); | |
2070 PcDesc* upper = nm->scopes_pcs_end(); | |
2071 lower += 1; // exclude initial sentinel | |
2072 PcDesc* res = NULL; | |
2073 for (PcDesc* p = lower; p < upper; p++) { | |
2074 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2075 if (match_desc(p, pc_offset, approximate)) { | |
2076 if (res == NULL) | |
2077 res = p; | |
2078 else | |
2079 res = (PcDesc*) badAddress; | |
2080 } | |
2081 } | |
2082 return res; | |
2083 } | |
2084 #endif | |
2085 | |
2086 | |
2087 // Finds a PcDesc with real-pc equal to "pc" | |
2088 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2089 address base_address = code_begin(); |
0 | 2090 if ((pc < base_address) || |
2091 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2092 return NULL; // PC is wildly out of range | |
2093 } | |
2094 int pc_offset = (int) (pc - base_address); | |
2095 | |
2096 // Check the PcDesc cache if it contains the desired PcDesc | |
2097 // (This as an almost 100% hit rate.) | |
2098 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2099 if (res != NULL) { | |
2100 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2101 return res; | |
2102 } | |
2103 | |
2104 // Fallback algorithm: quasi-linear search for the PcDesc | |
2105 // Find the last pc_offset less than the given offset. | |
2106 // The successor must be the required match, if there is a match at all. | |
2107 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2108 PcDesc* lower = scopes_pcs_begin(); | |
2109 PcDesc* upper = scopes_pcs_end(); | |
2110 upper -= 1; // exclude final sentinel | |
2111 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2112 | |
2113 #define assert_LU_OK \ | |
2114 /* invariant on lower..upper during the following search: */ \ | |
2115 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2116 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2117 assert_LU_OK; | |
2118 | |
2119 // Use the last successful return as a split point. | |
2120 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2121 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2122 if (mid->pc_offset() < pc_offset) { | |
2123 lower = mid; | |
2124 } else { | |
2125 upper = mid; | |
2126 } | |
2127 | |
2128 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2129 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2130 const int RADIX = (1 << LOG2_RADIX); | |
2131 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2132 while ((mid = lower + step) < upper) { | |
2133 assert_LU_OK; | |
2134 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2135 if (mid->pc_offset() < pc_offset) { | |
2136 lower = mid; | |
2137 } else { | |
2138 upper = mid; | |
2139 break; | |
2140 } | |
2141 } | |
2142 assert_LU_OK; | |
2143 } | |
2144 | |
2145 // Sneak up on the value with a linear search of length ~16. | |
2146 while (true) { | |
2147 assert_LU_OK; | |
2148 mid = lower + 1; | |
2149 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2150 if (mid->pc_offset() < pc_offset) { | |
2151 lower = mid; | |
2152 } else { | |
2153 upper = mid; | |
2154 break; | |
2155 } | |
2156 } | |
2157 #undef assert_LU_OK | |
2158 | |
2159 if (match_desc(upper, pc_offset, approximate)) { | |
2160 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2161 _pc_desc_cache.add_pc_desc(upper); | |
2162 return upper; | |
2163 } else { | |
2164 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2165 return NULL; | |
2166 } | |
2167 } | |
2168 | |
2169 | |
2170 bool nmethod::check_all_dependencies() { | |
2171 bool found_check = false; | |
2172 // wholesale check of all dependencies | |
2173 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2174 if (deps.check_dependency() != NULL) { | |
2175 found_check = true; | |
2176 NOT_DEBUG(break); | |
2177 } | |
2178 } | |
2179 return found_check; // tell caller if we found anything | |
2180 } | |
2181 | |
2182 bool nmethod::check_dependency_on(DepChange& changes) { | |
2183 // What has happened: | |
2184 // 1) a new class dependee has been added | |
2185 // 2) dependee and all its super classes have been marked | |
2186 bool found_check = false; // set true if we are upset | |
2187 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2188 // Evaluate only relevant dependencies. | |
2189 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2190 found_check = true; | |
2191 NOT_DEBUG(break); | |
2192 } | |
2193 } | |
2194 return found_check; | |
2195 } | |
2196 | |
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2197 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2198 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2199 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2200 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2201 if (deps.type() == Dependencies::evol_method) { | |
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2202 Method* method = deps.method_argument(0); |
0 | 2203 for (int j = 0; j < dependee_methods->length(); j++) { |
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2204 if (dependee_methods->at(j) == method) { |
0 | 2205 // RC_TRACE macro has an embedded ResourceMark |
2206 RC_TRACE(0x01000000, | |
2207 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2208 _method->method_holder()->external_name(), |
0 | 2209 _method->name()->as_C_string(), |
2210 _method->signature()->as_C_string(), compile_id(), | |
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2211 method->method_holder()->external_name(), |
0 | 2212 method->name()->as_C_string(), |
2213 method->signature()->as_C_string())); | |
2214 if (TraceDependencies || LogCompilation) | |
2215 deps.log_dependency(dependee); | |
2216 return true; | |
2217 } | |
2218 } | |
2219 } | |
2220 } | |
2221 return false; | |
2222 } | |
2223 | |
2224 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2225 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2226 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2227 if (deps.type() != Dependencies::evol_method) | |
2228 continue; | |
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2229 Method* method = deps.method_argument(0); |
0 | 2230 if (method == dependee) return true; |
2231 } | |
2232 return false; | |
2233 } | |
2234 | |
2235 | |
2236 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2237 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2238 if (is_zombie()) { |
2239 // a zombie may never be patched | |
2240 return false; | |
2241 } | |
2242 return true; | |
2243 } | |
2244 | |
2245 | |
2246 address nmethod::continuation_for_implicit_exception(address pc) { | |
2247 // Exception happened outside inline-cache check code => we are inside | |
2248 // an active nmethod => use cpc to determine a return address | |
1748 | 2249 int exception_offset = pc - code_begin(); |
0 | 2250 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2251 #ifdef ASSERT | |
2252 if (cont_offset == 0) { | |
2253 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2254 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2255 HandleMark hm(thread); | |
2256 ResourceMark rm(thread); | |
2257 CodeBlob* cb = CodeCache::find_blob(pc); | |
2258 assert(cb != NULL && cb == this, ""); | |
2259 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2260 print(); | |
2261 method()->print_codes(); | |
2262 print_code(); | |
2263 print_pcs(); | |
2264 } | |
2265 #endif | |
1250 | 2266 if (cont_offset == 0) { |
2267 // Let the normal error handling report the exception | |
2268 return NULL; | |
2269 } | |
1748 | 2270 return code_begin() + cont_offset; |
0 | 2271 } |
2272 | |
2273 | |
2274 | |
2275 void nmethod_init() { | |
2276 // make sure you didn't forget to adjust the filler fields | |
2277 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2278 } | |
2279 | |
2280 | |
2281 //------------------------------------------------------------------------------------------- | |
2282 | |
2283 | |
2284 // QQQ might we make this work from a frame?? | |
2285 nmethodLocker::nmethodLocker(address pc) { | |
2286 CodeBlob* cb = CodeCache::find_blob(pc); | |
2287 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2288 _nm = (nmethod*)cb; | |
2289 lock_nmethod(_nm); | |
2290 } | |
2291 | |
2342
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2292 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2293 // should pass zombie_ok == true. |
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2294 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2295 if (nm == NULL) return; |
2296 Atomic::inc(&nm->_lock_count); | |
2342
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2297 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2298 } |
2299 | |
2300 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2301 if (nm == NULL) return; | |
2302 Atomic::dec(&nm->_lock_count); | |
2303 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2304 } | |
2305 | |
1204 | 2306 |
2307 // ----------------------------------------------------------------------------- | |
2308 // nmethod::get_deopt_original_pc | |
2309 // | |
2310 // Return the original PC for the given PC if: | |
2311 // (a) the given PC belongs to a nmethod and | |
2312 // (b) it is a deopt PC | |
2313 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2314 if (fr->cb() == NULL) return NULL; | |
2315 | |
2316 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2317 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2318 return nm->get_original_pc(fr); | |
2319 | |
2320 return NULL; | |
0 | 2321 } |
2322 | |
2323 | |
2324 // ----------------------------------------------------------------------------- | |
1135
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2325 // MethodHandle |
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2326 |
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2327 bool nmethod::is_method_handle_return(address return_pc) { |
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2328 if (!has_method_handle_invokes()) return false; |
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2329 PcDesc* pd = pc_desc_at(return_pc); |
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2330 if (pd == NULL) |
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2331 return false; |
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2332 return pd->is_method_handle_invoke(); |
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2333 } |
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2334 |
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2335 |
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2336 // ----------------------------------------------------------------------------- |
0 | 2337 // Verification |
2338 | |
989
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2339 class VerifyOopsClosure: public OopClosure { |
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2340 nmethod* _nm; |
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2341 bool _ok; |
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2342 public: |
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2343 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2344 bool ok() { return _ok; } |
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2345 virtual void do_oop(oop* p) { |
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2346 if ((*p) == NULL || (*p)->is_oop()) return; |
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2347 if (_ok) { |
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2348 _nm->print_nmethod(true); |
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2349 _ok = false; |
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2350 } |
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2351 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
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2352 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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2353 } |
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2354 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2355 }; |
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2356 |
0 | 2357 void nmethod::verify() { |
2358 | |
2359 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2360 // seems odd. | |
2361 | |
2362 if( is_zombie() || is_not_entrant() ) | |
2363 return; | |
2364 | |
2365 // Make sure all the entry points are correctly aligned for patching. | |
2366 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2367 | |
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2368 // assert(method()->is_oop(), "must be valid"); |
0 | 2369 |
2370 ResourceMark rm; | |
2371 | |
2372 if (!CodeCache::contains(this)) { | |
1490
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2373 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2374 } |
2375 | |
2376 if(is_native_method() ) | |
2377 return; | |
2378 | |
2379 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2380 if (nm != this) { | |
1490
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2381 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2382 this)); |
0 | 2383 } |
2384 | |
2385 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2386 if (! p->verify(this)) { | |
2387 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2388 } | |
2389 } | |
2390 | |
989
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2391 VerifyOopsClosure voc(this); |
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2392 oops_do(&voc); |
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2393 assert(voc.ok(), "embedded oops must be OK"); |
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2394 verify_scavenge_root_oops(); |
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2395 |
0 | 2396 verify_scopes(); |
2397 } | |
2398 | |
2399 | |
2400 void nmethod::verify_interrupt_point(address call_site) { | |
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|
2401 // Verify IC only when nmethod installation is finished. |
13441 | 2402 bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed |
2403 || !this->is_in_use(); // nmethod is installed, but not in 'in_use' state | |
13071
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2404 if (is_installed) { |
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2405 Thread *cur = Thread::current(); |
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2406 if (CompiledIC_lock->owner() == cur || |
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2407 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
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2408 SafepointSynchronize::is_at_safepoint())) { |
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2409 CompiledIC_at(this, call_site); |
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2410 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
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2411 } else { |
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2412 MutexLocker ml_verify (CompiledIC_lock); |
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2413 CompiledIC_at(this, call_site); |
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2414 } |
0 | 2415 } |
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2416 |
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|
2417 PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address()); |
0 | 2418 assert(pd != NULL, "PcDesc must exist"); |
2419 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2420 pd->obj_decode_offset(), pd->should_reexecute(), |
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2421 pd->return_oop()); |
0 | 2422 !sd->is_top(); sd = sd->sender()) { |
2423 sd->verify(); | |
2424 } | |
2425 } | |
2426 | |
2427 void nmethod::verify_scopes() { | |
2428 if( !method() ) return; // Runtime stubs have no scope | |
2429 if (method()->is_native()) return; // Ignore stub methods. | |
2430 // iterate through all interrupt point | |
2431 // and verify the debug information is valid. | |
2432 RelocIterator iter((nmethod*)this); | |
2433 while (iter.next()) { | |
2434 address stub = NULL; | |
2435 switch (iter.type()) { | |
2436 case relocInfo::virtual_call_type: | |
2437 verify_interrupt_point(iter.addr()); | |
2438 break; | |
2439 case relocInfo::opt_virtual_call_type: | |
2440 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2441 verify_interrupt_point(iter.addr()); | |
2442 break; | |
2443 case relocInfo::static_call_type: | |
2444 stub = iter.static_call_reloc()->static_stub(); | |
2445 //verify_interrupt_point(iter.addr()); | |
2446 break; | |
2447 case relocInfo::runtime_call_type: | |
2448 address destination = iter.reloc()->value(); | |
2449 // Right now there is no way to find out which entries support | |
2450 // an interrupt point. It would be nice if we had this | |
2451 // information in a table. | |
2452 break; | |
2453 } | |
2454 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2455 } | |
2456 } | |
2457 | |
2458 | |
2459 // ----------------------------------------------------------------------------- | |
2460 // Non-product code | |
2461 #ifndef PRODUCT | |
2462 | |
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2463 class DebugScavengeRoot: public OopClosure { |
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2464 nmethod* _nm; |
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2465 bool _ok; |
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2466 public: |
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2467 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2468 bool ok() { return _ok; } |
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2469 virtual void do_oop(oop* p) { |
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2470 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2471 if (_ok) { |
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2472 _nm->print_nmethod(true); |
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2473 _ok = false; |
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|
2474 } |
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diff
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|
2475 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
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2476 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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|
2477 (*p)->print(); |
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|
2478 } |
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|
2479 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2480 }; |
0 | 2481 |
989
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2482 void nmethod::verify_scavenge_root_oops() { |
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2483 if (!on_scavenge_root_list()) { |
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2484 // Actually look inside, to verify the claim that it's clean. |
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2485 DebugScavengeRoot debug_scavenge_root(this); |
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2486 oops_do(&debug_scavenge_root); |
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2487 if (!debug_scavenge_root.ok()) |
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2488 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2489 } |
989
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2490 assert(scavenge_root_not_marked(), ""); |
0 | 2491 } |
2492 | |
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2493 #endif // PRODUCT |
0 | 2494 |
2495 // Printing operations | |
2496 | |
2497 void nmethod::print() const { | |
2498 ResourceMark rm; | |
2499 ttyLocker ttyl; // keep the following output all in one block | |
2500 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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|
2501 tty->print("Compiled method "); |
0 | 2502 |
2503 if (is_compiled_by_c1()) { | |
2504 tty->print("(c1) "); | |
2505 } else if (is_compiled_by_c2()) { | |
2506 tty->print("(c2) "); | |
1692 | 2507 } else if (is_compiled_by_shark()) { |
2508 tty->print("(shark) "); | |
0 | 2509 } else { |
2510 tty->print("(nm) "); | |
2511 } | |
2512 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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diff
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|
2513 print_on(tty, NULL); |
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|
2514 |
0 | 2515 if (WizardMode) { |
2516 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2517 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2518 tty->print(" { "); | |
2519 if (is_in_use()) tty->print("in_use "); | |
2520 if (is_not_entrant()) tty->print("not_entrant "); | |
2521 if (is_zombie()) tty->print("zombie "); | |
2522 if (is_unloaded()) tty->print("unloaded "); | |
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|
2523 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2524 tty->print_cr("}:"); |
2525 } | |
2526 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2527 (address)this, | |
2528 (address)this + size(), | |
2529 size()); | |
2530 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2531 relocation_begin(), | |
2532 relocation_end(), | |
2533 relocation_size()); | |
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0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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1748
diff
changeset
|
2534 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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1748
diff
changeset
|
2535 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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diff
changeset
|
2536 consts_end(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
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diff
changeset
|
2537 consts_size()); |
1748 | 2538 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2539 insts_begin(), | |
2540 insts_end(), | |
2541 insts_size()); | |
0 | 2542 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2543 stub_begin(), | |
2544 stub_end(), | |
2545 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
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1538
diff
changeset
|
2546 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
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1538
diff
changeset
|
2547 oops_begin(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
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diff
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|
2548 oops_end(), |
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diff
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|
2549 oops_size()); |
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da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
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|
2550 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
2551 metadata_begin(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2552 metadata_end(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2553 metadata_size()); |
0 | 2554 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2555 scopes_data_begin(), | |
2556 scopes_data_end(), | |
2557 scopes_data_size()); | |
2558 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2559 scopes_pcs_begin(), | |
2560 scopes_pcs_end(), | |
2561 scopes_pcs_size()); | |
2562 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2563 dependencies_begin(), | |
2564 dependencies_end(), | |
2565 dependencies_size()); | |
2566 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2567 handler_table_begin(), | |
2568 handler_table_end(), | |
2569 handler_table_size()); | |
2570 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2571 nul_chk_table_begin(), | |
2572 nul_chk_table_end(), | |
2573 nul_chk_table_size()); | |
2574 } | |
2575 | |
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|
2576 void nmethod::print_code() { |
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|
2577 HandleMark hm; |
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|
2578 ResourceMark m; |
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|
2579 Disassembler::decode(this); |
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|
2580 } |
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|
2581 |
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2582 |
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|
2583 #ifndef PRODUCT |
0 | 2584 |
2585 void nmethod::print_scopes() { | |
2586 // Find the first pc desc for all scopes in the code and print it. | |
2587 ResourceMark rm; | |
2588 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2589 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2590 continue; | |
2591 | |
2592 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2593 sd->print_on(tty, p); | |
2594 } | |
2595 } | |
2596 | |
2597 void nmethod::print_dependencies() { | |
2598 ResourceMark rm; | |
2599 ttyLocker ttyl; // keep the following output all in one block | |
2600 tty->print_cr("Dependencies:"); | |
2601 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2602 deps.print_dependency(); | |
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2603 Klass* ctxk = deps.context_type(); |
0 | 2604 if (ctxk != NULL) { |
6983 | 2605 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { |
2606 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
0 | 2607 } |
2608 } | |
2609 deps.log_dependency(); // put it into the xml log also | |
2610 } | |
2611 } | |
2612 | |
2613 | |
2614 void nmethod::print_relocations() { | |
2615 ResourceMark m; // in case methods get printed via the debugger | |
2616 tty->print_cr("relocations:"); | |
2617 RelocIterator iter(this); | |
2618 iter.print(); | |
2619 if (UseRelocIndex) { | |
2620 jint* index_end = (jint*)relocation_end() - 1; | |
2621 jint index_size = *index_end; | |
2622 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2623 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2624 if (index_size > 0) { | |
2625 jint* ip; | |
2626 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2627 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2628 ip[0], | |
2629 ip[1], | |
2630 header_end()+ip[0], | |
2631 relocation_begin()-1+ip[1]); | |
2632 for (; ip < index_end; ip++) | |
2633 tty->print_cr(" (%d ?)", ip[0]); | |
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ef57c43512d6
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
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|
2634 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip); |
ef57c43512d6
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|
2635 ip++; |
0 | 2636 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
2637 } | |
2638 } | |
2639 } | |
2640 | |
2641 | |
2642 void nmethod::print_pcs() { | |
2643 ResourceMark m; // in case methods get printed via debugger | |
2644 tty->print_cr("pc-bytecode offsets:"); | |
2645 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2646 p->print(this); | |
2647 } | |
2648 } | |
2649 | |
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2650 #endif // PRODUCT |
0 | 2651 |
2652 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2653 RelocIterator iter(this, begin, end); | |
2654 bool have_one = false; | |
2655 while (iter.next()) { | |
2656 have_one = true; | |
2657 switch (iter.type()) { | |
2658 case relocInfo::none: return "no_reloc"; | |
2659 case relocInfo::oop_type: { | |
2660 stringStream st; | |
2661 oop_Relocation* r = iter.oop_reloc(); | |
2662 oop obj = r->oop_value(); | |
2663 st.print("oop("); | |
2664 if (obj == NULL) st.print("NULL"); | |
2665 else obj->print_value_on(&st); | |
2666 st.print(")"); | |
2667 return st.as_string(); | |
2668 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2669 case relocInfo::metadata_type: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2670 stringStream st; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2671 metadata_Relocation* r = iter.metadata_reloc(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2672 Metadata* obj = r->metadata_value(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2673 st.print("metadata("); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2674 if (obj == NULL) st.print("NULL"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2675 else obj->print_value_on(&st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2676 st.print(")"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2677 return st.as_string(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2678 } |
0 | 2679 case relocInfo::virtual_call_type: return "virtual_call"; |
2680 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2681 case relocInfo::static_call_type: return "static_call"; | |
2682 case relocInfo::static_stub_type: return "static_stub"; | |
2683 case relocInfo::runtime_call_type: return "runtime_call"; | |
2684 case relocInfo::external_word_type: return "external_word"; | |
2685 case relocInfo::internal_word_type: return "internal_word"; | |
2686 case relocInfo::section_word_type: return "section_word"; | |
2687 case relocInfo::poll_type: return "poll"; | |
2688 case relocInfo::poll_return_type: return "poll_return"; | |
2689 case relocInfo::type_mask: return "type_bit_mask"; | |
2690 } | |
2691 } | |
2692 return have_one ? "other" : NULL; | |
2693 } | |
2694 | |
2695 // Return a the last scope in (begin..end] | |
2696 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2697 PcDesc* p = pc_desc_near(begin+1); | |
2698 if (p != NULL && p->real_pc(this) <= end) { | |
2699 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2700 p->obj_decode_offset(), p->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2701 p->return_oop()); |
0 | 2702 } |
2703 return NULL; | |
2704 } | |
2705 | |
6796
b31471cdc53e
7200163: add CodeComments functionality to assember stubs
kvn
parents:
6792
diff
changeset
|
2706 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2707 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2708 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2709 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2710 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2711 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2712 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2713 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2714 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2715 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2716 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2717 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2718 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2719 methodHandle m = method(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2720 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2721 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2722 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2723 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2724 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2725 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2726 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2727 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2728 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2729 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2730 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2731 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2732 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2733 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2734 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2735 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2736 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2737 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2738 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2739 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2740 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2741 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2742 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2743 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2744 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2745 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2746 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2747 int stack_slot_offset = this->frame_size() * wordSize; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2748 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2749 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2750 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2751 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2752 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2753 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2754 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2755 BasicType t = (at_this ? T_OBJECT : ss.type()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2756 assert(t == sig_bt[sig_index], "sigs in sync"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2757 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2758 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2759 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2760 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2761 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2762 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2763 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2764 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2765 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2766 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2767 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2768 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2769 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2770 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2771 if (offset == stack_slot_offset) at_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2772 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2773 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2774 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2775 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2776 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2777 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2778 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2779 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2780 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2781 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2782 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2783 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2784 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2785 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2786 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2787 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2788 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2789 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2790 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2791 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2792 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2793 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2794 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2795 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2796 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2797 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2798 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2799 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2800 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2801 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2802 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2803 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2804 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2805 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2806 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2807 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2808 } |
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2809 } |
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2810 } |
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2811 } |
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2812 |
0 | 2813 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2814 // First, find an oopmap in (begin, end]. | |
2815 // We use the odd half-closed interval so that oop maps and scope descs | |
2816 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2817 address base = code_begin(); |
0 | 2818 OopMapSet* oms = oop_maps(); |
2819 if (oms != NULL) { | |
2820 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2821 OopMap* om = oms->at(i); | |
2822 address pc = base + om->offset(); | |
2823 if (pc > begin) { | |
2824 if (pc <= end) { | |
100
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2825 st->move_to(column); |
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2826 st->print("; "); |
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2827 om->print_on(st); |
0 | 2828 } |
2829 break; | |
2830 } | |
2831 } | |
2832 } | |
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2833 |
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2834 // Print any debug info present at this pc. |
0 | 2835 ScopeDesc* sd = scope_desc_in(begin, end); |
2836 if (sd != NULL) { | |
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2837 st->move_to(column); |
0 | 2838 if (sd->bci() == SynchronizationEntryBCI) { |
2839 st->print(";*synchronization entry"); | |
2840 } else { | |
6725
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2841 if (sd->method() == NULL) { |
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2842 st->print("method is NULL"); |
0 | 2843 } else if (sd->method()->is_native()) { |
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2844 st->print("method is native"); |
0 | 2845 } else { |
2142 | 2846 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2847 st->print(";*%s", Bytecodes::name(bc)); |
2848 switch (bc) { | |
2849 case Bytecodes::_invokevirtual: | |
2850 case Bytecodes::_invokespecial: | |
2851 case Bytecodes::_invokestatic: | |
2852 case Bytecodes::_invokeinterface: | |
2853 { | |
2142 | 2854 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2855 st->print(" "); |
2142 | 2856 if (invoke.name() != NULL) |
2857 invoke.name()->print_symbol_on(st); | |
0 | 2858 else |
2859 st->print("<UNKNOWN>"); | |
2860 break; | |
2861 } | |
2862 case Bytecodes::_getfield: | |
2863 case Bytecodes::_putfield: | |
2864 case Bytecodes::_getstatic: | |
2865 case Bytecodes::_putstatic: | |
2866 { | |
2142 | 2867 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2868 st->print(" "); |
2142 | 2869 if (field.name() != NULL) |
2870 field.name()->print_symbol_on(st); | |
0 | 2871 else |
2872 st->print("<UNKNOWN>"); | |
2873 } | |
2874 } | |
2875 } | |
2876 } | |
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2877 |
0 | 2878 // Print all scopes |
2879 for (;sd != NULL; sd = sd->sender()) { | |
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2880 st->move_to(column); |
0 | 2881 st->print("; -"); |
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2882 if (sd->method() == NULL) { |
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2883 st->print("method is NULL"); |
0 | 2884 } else { |
2885 sd->method()->print_short_name(st); | |
2886 } | |
2887 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2888 if (lineno != -1) { | |
2889 st->print("@%d (line %d)", sd->bci(), lineno); | |
2890 } else { | |
2891 st->print("@%d", sd->bci()); | |
2892 } | |
2893 st->cr(); | |
2894 } | |
2895 } | |
2896 | |
2897 // Print relocation information | |
2898 const char* str = reloc_string_for(begin, end); | |
2899 if (str != NULL) { | |
2900 if (sd != NULL) st->cr(); | |
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2901 st->move_to(column); |
0 | 2902 st->print("; {%s}", str); |
2903 } | |
1748 | 2904 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2905 if (cont_offset != 0) { |
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2906 st->move_to(column); |
1748 | 2907 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2908 } |
2909 | |
2910 } | |
2911 | |
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2912 #ifndef PRODUCT |
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2913 |
0 | 2914 void nmethod::print_value_on(outputStream* st) const { |
2405
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2915 st->print("nmethod"); |
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2916 print_on(st, NULL); |
0 | 2917 } |
2918 | |
2919 void nmethod::print_calls(outputStream* st) { | |
2920 RelocIterator iter(this); | |
2921 while (iter.next()) { | |
2922 switch (iter.type()) { | |
2923 case relocInfo::virtual_call_type: | |
2924 case relocInfo::opt_virtual_call_type: { | |
2925 VerifyMutexLocker mc(CompiledIC_lock); | |
2926 CompiledIC_at(iter.reloc())->print(); | |
2927 break; | |
2928 } | |
2929 case relocInfo::static_call_type: | |
2930 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2931 compiledStaticCall_at(iter.reloc())->print(); | |
2932 break; | |
2933 } | |
2934 } | |
2935 } | |
2936 | |
2937 void nmethod::print_handler_table() { | |
2938 ExceptionHandlerTable(this).print(); | |
2939 } | |
2940 | |
2941 void nmethod::print_nul_chk_table() { | |
1748 | 2942 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2943 } |
2944 | |
2945 void nmethod::print_statistics() { | |
2946 ttyLocker ttyl; | |
2947 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2948 nmethod_stats.print_native_nmethod_stats(); | |
2949 nmethod_stats.print_nmethod_stats(); | |
2950 DebugInformationRecorder::print_statistics(); | |
2951 nmethod_stats.print_pc_stats(); | |
2952 Dependencies::print_statistics(); | |
2953 if (xtty != NULL) xtty->tail("statistics"); | |
2954 } | |
2955 | |
2956 #endif // PRODUCT |