Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.cpp @ 20191:fd81a5764900
8046231: G1: Code root location ... from nmethod ... not in strong code roots for region
Reviewed-by: tschatzl, ehelin
author | pliden |
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date | Mon, 23 Jun 2014 16:43:41 +0200 |
parents | 78bbf4d43a14 |
children | ce8f6bb717c9 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 |
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49 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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50 |
0 | 51 #ifdef DTRACE_ENABLED |
52 | |
53 // Only bother with this argument setup if dtrace is available | |
54 | |
4006 | 55 #ifndef USDT2 |
0 | 56 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
57 const char*, int, const char*, int, const char*, int, void*, size_t); | |
58 | |
59 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
60 char*, int, char*, int, char*, int); | |
61 | |
62 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
63 { \ | |
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64 Method* m = (method); \ |
0 | 65 if (m != NULL) { \ |
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66 Symbol* klass_name = m->klass_name(); \ |
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67 Symbol* name = m->name(); \ |
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68 Symbol* signature = m->signature(); \ |
0 | 69 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
70 klass_name->bytes(), klass_name->utf8_length(), \ | |
71 name->bytes(), name->utf8_length(), \ | |
72 signature->bytes(), signature->utf8_length()); \ | |
73 } \ | |
74 } | |
4006 | 75 #else /* USDT2 */ |
76 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
77 { \ | |
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78 Method* m = (method); \ |
4006 | 79 if (m != NULL) { \ |
80 Symbol* klass_name = m->klass_name(); \ | |
81 Symbol* name = m->name(); \ | |
82 Symbol* signature = m->signature(); \ | |
83 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
84 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
85 (char *) name->bytes(), name->utf8_length(), \ | |
86 (char *) signature->bytes(), signature->utf8_length()); \ | |
87 } \ | |
88 } | |
89 #endif /* USDT2 */ | |
0 | 90 |
91 #else // ndef DTRACE_ENABLED | |
92 | |
93 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
94 | |
95 #endif | |
96 | |
97 bool nmethod::is_compiled_by_c1() const { | |
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98 if (compiler() == NULL) { |
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99 return false; |
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100 } |
0 | 101 return compiler()->is_c1(); |
102 } | |
103 bool nmethod::is_compiled_by_c2() const { | |
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104 if (compiler() == NULL) { |
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105 return false; |
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106 } |
0 | 107 return compiler()->is_c2(); |
108 } | |
1692 | 109 bool nmethod::is_compiled_by_shark() const { |
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110 if (compiler() == NULL) { |
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111 return false; |
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112 } |
1692 | 113 return compiler()->is_shark(); |
114 } | |
0 | 115 |
116 | |
117 | |
118 //--------------------------------------------------------------------------------- | |
119 // NMethod statistics | |
120 // They are printed under various flags, including: | |
121 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
122 // (In the latter two cases, they like other stats are printed to the log only.) | |
123 | |
124 #ifndef PRODUCT | |
125 // These variables are put into one block to reduce relocations | |
126 // and make it simpler to print from the debugger. | |
127 static | |
128 struct nmethod_stats_struct { | |
129 int nmethod_count; | |
130 int total_size; | |
131 int relocation_size; | |
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132 int consts_size; |
1748 | 133 int insts_size; |
0 | 134 int stub_size; |
135 int scopes_data_size; | |
136 int scopes_pcs_size; | |
137 int dependencies_size; | |
138 int handler_table_size; | |
139 int nul_chk_table_size; | |
140 int oops_size; | |
141 | |
142 void note_nmethod(nmethod* nm) { | |
143 nmethod_count += 1; | |
144 total_size += nm->size(); | |
145 relocation_size += nm->relocation_size(); | |
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146 consts_size += nm->consts_size(); |
1748 | 147 insts_size += nm->insts_size(); |
0 | 148 stub_size += nm->stub_size(); |
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149 oops_size += nm->oops_size(); |
0 | 150 scopes_data_size += nm->scopes_data_size(); |
151 scopes_pcs_size += nm->scopes_pcs_size(); | |
152 dependencies_size += nm->dependencies_size(); | |
153 handler_table_size += nm->handler_table_size(); | |
154 nul_chk_table_size += nm->nul_chk_table_size(); | |
155 } | |
156 void print_nmethod_stats() { | |
157 if (nmethod_count == 0) return; | |
158 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
159 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
160 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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161 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 162 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 163 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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164 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 165 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
166 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
167 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
168 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
169 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
170 } | |
171 | |
172 int native_nmethod_count; | |
173 int native_total_size; | |
174 int native_relocation_size; | |
1748 | 175 int native_insts_size; |
0 | 176 int native_oops_size; |
177 void note_native_nmethod(nmethod* nm) { | |
178 native_nmethod_count += 1; | |
179 native_total_size += nm->size(); | |
180 native_relocation_size += nm->relocation_size(); | |
1748 | 181 native_insts_size += nm->insts_size(); |
0 | 182 native_oops_size += nm->oops_size(); |
183 } | |
184 void print_native_nmethod_stats() { | |
185 if (native_nmethod_count == 0) return; | |
186 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
187 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
188 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 189 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 190 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
191 } | |
192 | |
193 int pc_desc_resets; // number of resets (= number of caches) | |
194 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
195 int pc_desc_approx; // number of those which have approximate true | |
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196 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 197 int pc_desc_hits; // number of LRU cache hits |
198 int pc_desc_tests; // total number of PcDesc examinations | |
199 int pc_desc_searches; // total number of quasi-binary search steps | |
200 int pc_desc_adds; // number of LUR cache insertions | |
201 | |
202 void print_pc_stats() { | |
203 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
204 pc_desc_queries, | |
205 (double)(pc_desc_tests + pc_desc_searches) | |
206 / pc_desc_queries); | |
207 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
208 pc_desc_resets, | |
209 pc_desc_queries, pc_desc_approx, | |
210 pc_desc_repeats, pc_desc_hits, | |
211 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
212 } | |
213 } nmethod_stats; | |
214 #endif //PRODUCT | |
215 | |
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216 |
0 | 217 //--------------------------------------------------------------------------------- |
218 | |
219 | |
220 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
221 assert(pc != NULL, "Must be non null"); | |
222 assert(exception.not_null(), "Must be non null"); | |
223 assert(handler != NULL, "Must be non null"); | |
224 | |
225 _count = 0; | |
226 _exception_type = exception->klass(); | |
227 _next = NULL; | |
228 | |
229 add_address_and_handler(pc,handler); | |
230 } | |
231 | |
232 | |
233 address ExceptionCache::match(Handle exception, address pc) { | |
234 assert(pc != NULL,"Must be non null"); | |
235 assert(exception.not_null(),"Must be non null"); | |
236 if (exception->klass() == exception_type()) { | |
237 return (test_address(pc)); | |
238 } | |
239 | |
240 return NULL; | |
241 } | |
242 | |
243 | |
244 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
245 assert(exception.not_null(),"Must be non null"); | |
246 if (exception->klass() == exception_type() && count() < cache_size) { | |
247 return true; | |
248 } | |
249 return false; | |
250 } | |
251 | |
252 | |
253 address ExceptionCache::test_address(address addr) { | |
254 for (int i=0; i<count(); i++) { | |
255 if (pc_at(i) == addr) { | |
256 return handler_at(i); | |
257 } | |
258 } | |
259 return NULL; | |
260 } | |
261 | |
262 | |
263 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
264 if (test_address(addr) == handler) return true; | |
265 if (count() < cache_size) { | |
266 set_pc_at(count(),addr); | |
267 set_handler_at(count(), handler); | |
268 increment_count(); | |
269 return true; | |
270 } | |
271 return false; | |
272 } | |
273 | |
274 | |
275 // private method for handling exception cache | |
276 // These methods are private, and used to manipulate the exception cache | |
277 // directly. | |
278 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
279 ExceptionCache* ec = exception_cache(); | |
280 while (ec != NULL) { | |
281 if (ec->match_exception_with_space(exception)) { | |
282 return ec; | |
283 } | |
284 ec = ec->next(); | |
285 } | |
286 return NULL; | |
287 } | |
288 | |
289 | |
290 //----------------------------------------------------------------------------- | |
291 | |
292 | |
293 // Helper used by both find_pc_desc methods. | |
294 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
295 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
296 if (!approximate) | |
297 return pc->pc_offset() == pc_offset; | |
298 else | |
299 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
300 } | |
301 | |
302 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
303 if (initial_pc_desc == NULL) { | |
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304 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 305 return; |
306 } | |
307 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
308 // reset the cache by filling it with benign (non-null) values | |
309 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
310 for (int i = 0; i < cache_size; i++) | |
311 _pc_descs[i] = initial_pc_desc; | |
312 } | |
313 | |
314 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
315 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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316 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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317 |
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318 // Note: one might think that caching the most recently |
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319 // read value separately would be a win, but one would be |
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320 // wrong. When many threads are updating it, the cache |
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321 // line it's in would bounce between caches, negating |
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322 // any benefit. |
0 | 323 |
324 // In order to prevent race conditions do not load cache elements | |
325 // repeatedly, but use a local copy: | |
326 PcDesc* res; | |
327 | |
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328 // Step one: Check the most recently added value. |
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329 res = _pc_descs[0]; |
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330 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 331 if (match_desc(res, pc_offset, approximate)) { |
332 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
333 return res; | |
334 } | |
335 | |
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336 // Step two: Check the rest of the LRU cache. |
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337 for (int i = 1; i < cache_size; ++i) { |
0 | 338 res = _pc_descs[i]; |
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339 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 340 if (match_desc(res, pc_offset, approximate)) { |
341 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
342 return res; | |
343 } | |
344 } | |
345 | |
346 // Report failure. | |
347 return NULL; | |
348 } | |
349 | |
350 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
351 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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352 // Update the LRU cache by shifting pc_desc forward. |
0 | 353 for (int i = 0; i < cache_size; i++) { |
354 PcDesc* next = _pc_descs[i]; | |
355 _pc_descs[i] = pc_desc; | |
356 pc_desc = next; | |
357 } | |
358 } | |
359 | |
360 // adjust pcs_size so that it is a multiple of both oopSize and | |
361 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
362 // of oopSize, then 2*sizeof(PcDesc) is) | |
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363 static int adjust_pcs_size(int pcs_size) { |
0 | 364 int nsize = round_to(pcs_size, oopSize); |
365 if ((nsize % sizeof(PcDesc)) != 0) { | |
366 nsize = pcs_size + sizeof(PcDesc); | |
367 } | |
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368 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 369 return nsize; |
370 } | |
371 | |
372 //----------------------------------------------------------------------------- | |
373 | |
374 | |
375 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
376 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
377 assert(new_entry != NULL,"Must be non null"); | |
378 assert(new_entry->next() == NULL, "Must be null"); | |
379 | |
380 if (exception_cache() != NULL) { | |
381 new_entry->set_next(exception_cache()); | |
382 } | |
383 set_exception_cache(new_entry); | |
384 } | |
385 | |
386 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
387 ExceptionCache* prev = NULL; | |
388 ExceptionCache* curr = exception_cache(); | |
389 assert(curr != NULL, "nothing to remove"); | |
390 // find the previous and next entry of ec | |
391 while (curr != ec) { | |
392 prev = curr; | |
393 curr = curr->next(); | |
394 assert(curr != NULL, "ExceptionCache not found"); | |
395 } | |
396 // now: curr == ec | |
397 ExceptionCache* next = curr->next(); | |
398 if (prev == NULL) { | |
399 set_exception_cache(next); | |
400 } else { | |
401 prev->set_next(next); | |
402 } | |
403 delete curr; | |
404 } | |
405 | |
406 | |
407 // public method for accessing the exception cache | |
408 // These are the public access methods. | |
409 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
410 // We never grab a lock to read the exception cache, so we may | |
411 // have false negatives. This is okay, as it can only happen during | |
412 // the first few exception lookups for a given nmethod. | |
413 ExceptionCache* ec = exception_cache(); | |
414 while (ec != NULL) { | |
415 address ret_val; | |
416 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
417 return ret_val; | |
418 } | |
419 ec = ec->next(); | |
420 } | |
421 return NULL; | |
422 } | |
423 | |
424 | |
425 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
426 // There are potential race conditions during exception cache updates, so we | |
427 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 428 // we don't lock during reads, it is possible to have several threads attempt |
0 | 429 // to update the cache with the same data. We need to check for already inserted |
430 // copies of the current data before adding it. | |
431 | |
432 MutexLocker ml(ExceptionCache_lock); | |
433 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
434 | |
435 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
436 target_entry = new ExceptionCache(exception,pc,handler); | |
437 add_exception_cache_entry(target_entry); | |
438 } | |
439 } | |
440 | |
441 | |
442 //-------------end of code for ExceptionCache-------------- | |
443 | |
444 | |
445 int nmethod::total_size() const { | |
446 return | |
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447 consts_size() + |
1748 | 448 insts_size() + |
0 | 449 stub_size() + |
450 scopes_data_size() + | |
451 scopes_pcs_size() + | |
452 handler_table_size() + | |
453 nul_chk_table_size(); | |
454 } | |
455 | |
456 const char* nmethod::compile_kind() const { | |
457 if (is_osr_method()) return "osr"; | |
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458 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 459 return NULL; |
460 } | |
461 | |
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462 // Fill in default values for various flag fields |
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463 void nmethod::init_defaults() { |
13441 | 464 _state = in_use; |
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465 _marked_for_reclamation = 0; |
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466 _has_flushed_dependencies = 0; |
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467 _has_unsafe_access = 0; |
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468 _has_method_handle_invokes = 0; |
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469 _lazy_critical_native = 0; |
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470 _has_wide_vectors = 0; |
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471 _marked_for_deoptimization = 0; |
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472 _lock_count = 0; |
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473 _stack_traversal_mark = 0; |
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474 _unload_reported = false; // jvmti state |
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475 |
1726 | 476 #ifdef ASSERT |
477 _oops_are_stale = false; | |
478 #endif | |
479 | |
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480 _oops_do_mark_link = NULL; |
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481 _jmethod_id = NULL; |
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482 _osr_link = NULL; |
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483 _scavenge_root_link = NULL; |
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484 _scavenge_root_state = 0; |
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485 _compiler = NULL; |
17780 | 486 #if INCLUDE_RTM_OPT |
487 _rtm_state = NoRTM; | |
488 #endif | |
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489 #ifdef HAVE_DTRACE_H |
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490 _trap_offset = 0; |
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491 #endif // def HAVE_DTRACE_H |
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492 } |
0 | 493 |
494 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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495 int compile_id, |
0 | 496 CodeBuffer *code_buffer, |
497 int vep_offset, | |
498 int frame_complete, | |
499 int frame_size, | |
500 ByteSize basic_lock_owner_sp_offset, | |
501 ByteSize basic_lock_sp_offset, | |
502 OopMapSet* oop_maps) { | |
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503 code_buffer->finalize_oop_references(method); |
0 | 504 // create nmethod |
505 nmethod* nm = NULL; | |
506 { | |
507 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
508 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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509 CodeOffsets offsets; |
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510 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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511 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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512 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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513 compile_id, &offsets, |
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514 code_buffer, frame_size, |
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515 basic_lock_owner_sp_offset, |
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516 basic_lock_sp_offset, oop_maps); |
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517 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
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518 if (PrintAssembly && nm != NULL) { |
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519 Disassembler::decode(nm); |
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520 } |
0 | 521 } |
522 // verify nmethod | |
523 debug_only(if (nm) nm->verify();) // might block | |
524 | |
525 if (nm != NULL) { | |
526 nm->log_new_nmethod(); | |
527 } | |
528 | |
529 return nm; | |
530 } | |
531 | |
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532 #ifdef HAVE_DTRACE_H |
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533 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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534 CodeBuffer *code_buffer, |
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535 int vep_offset, |
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536 int trap_offset, |
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537 int frame_complete, |
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538 int frame_size) { |
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539 code_buffer->finalize_oop_references(method); |
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540 // create nmethod |
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541 nmethod* nm = NULL; |
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542 { |
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543 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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544 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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545 CodeOffsets offsets; |
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546 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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547 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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548 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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549 |
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550 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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551 &offsets, code_buffer, frame_size); |
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552 |
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553 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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554 if (PrintAssembly && nm != NULL) { |
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555 Disassembler::decode(nm); |
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556 } |
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557 } |
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558 // verify nmethod |
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559 debug_only(if (nm) nm->verify();) // might block |
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560 |
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561 if (nm != NULL) { |
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562 nm->log_new_nmethod(); |
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563 } |
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564 |
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565 return nm; |
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566 } |
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567 |
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568 #endif // def HAVE_DTRACE_H |
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569 |
0 | 570 nmethod* nmethod::new_nmethod(methodHandle method, |
571 int compile_id, | |
572 int entry_bci, | |
573 CodeOffsets* offsets, | |
574 int orig_pc_offset, | |
575 DebugInformationRecorder* debug_info, | |
576 Dependencies* dependencies, | |
577 CodeBuffer* code_buffer, int frame_size, | |
578 OopMapSet* oop_maps, | |
579 ExceptionHandlerTable* handler_table, | |
580 ImplicitExceptionTable* nul_chk_table, | |
581 AbstractCompiler* compiler, | |
582 int comp_level | |
583 ) | |
584 { | |
585 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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586 code_buffer->finalize_oop_references(method); |
0 | 587 // create nmethod |
588 nmethod* nm = NULL; | |
589 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
590 int nmethod_size = | |
591 allocation_size(code_buffer, sizeof(nmethod)) | |
592 + adjust_pcs_size(debug_info->pcs_size()) | |
593 + round_to(dependencies->size_in_bytes() , oopSize) | |
594 + round_to(handler_table->size_in_bytes(), oopSize) | |
595 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
596 + round_to(debug_info->data_size() , oopSize); | |
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597 |
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598 nm = new (nmethod_size) |
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599 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
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600 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
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601 oop_maps, |
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602 handler_table, |
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603 nul_chk_table, |
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604 compiler, |
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605 comp_level); |
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606 |
0 | 607 if (nm != NULL) { |
608 // To make dependency checking during class loading fast, record | |
609 // the nmethod dependencies in the classes it is dependent on. | |
610 // This allows the dependency checking code to simply walk the | |
611 // class hierarchy above the loaded class, checking only nmethods | |
612 // which are dependent on those classes. The slow way is to | |
613 // check every nmethod for dependencies which makes it linear in | |
614 // the number of methods compiled. For applications with a lot | |
615 // classes the slow way is too slow. | |
616 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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617 Klass* klass = deps.context_type(); |
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618 if (klass == NULL) { |
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619 continue; // ignore things like evol_method |
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620 } |
0 | 621 |
622 // record this nmethod as dependent on this klass | |
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623 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 624 } |
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625 NOT_PRODUCT(nmethod_stats.note_nmethod(nm)); |
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626 if (PrintAssembly || CompilerOracle::has_option_string(method, "PrintAssembly")) { |
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627 Disassembler::decode(nm); |
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628 } |
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629 } |
0 | 630 } |
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631 // Do verification and logging outside CodeCache_lock. |
0 | 632 if (nm != NULL) { |
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633 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet. |
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634 DEBUG_ONLY(nm->verify();) |
0 | 635 nm->log_new_nmethod(); |
636 } | |
637 return nm; | |
638 } | |
639 | |
640 | |
641 // For native wrappers | |
642 nmethod::nmethod( | |
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643 Method* method, |
0 | 644 int nmethod_size, |
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645 int compile_id, |
0 | 646 CodeOffsets* offsets, |
647 CodeBuffer* code_buffer, | |
648 int frame_size, | |
649 ByteSize basic_lock_owner_sp_offset, | |
650 ByteSize basic_lock_sp_offset, | |
651 OopMapSet* oop_maps ) | |
652 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
653 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 654 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
655 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 656 { |
657 { | |
658 debug_only(No_Safepoint_Verifier nsv;) | |
659 assert_locked_or_safepoint(CodeCache_lock); | |
660 | |
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661 init_defaults(); |
0 | 662 _method = method; |
663 _entry_bci = InvocationEntryBci; | |
664 // We have no exception handler or deopt handler make the | |
665 // values something that will never match a pc like the nmethod vtable entry | |
666 _exception_offset = 0; | |
667 _deoptimize_offset = 0; | |
1204 | 668 _deoptimize_mh_offset = 0; |
0 | 669 _orig_pc_offset = 0; |
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670 |
1748 | 671 _consts_offset = data_offset(); |
0 | 672 _stub_offset = data_offset(); |
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673 _oops_offset = data_offset(); |
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674 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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675 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 676 _scopes_pcs_offset = _scopes_data_offset; |
677 _dependencies_offset = _scopes_pcs_offset; | |
678 _handler_table_offset = _dependencies_offset; | |
679 _nul_chk_table_offset = _handler_table_offset; | |
680 _nmethod_end_offset = _nul_chk_table_offset; | |
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681 _compile_id = compile_id; |
0 | 682 _comp_level = CompLevel_none; |
1748 | 683 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
684 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 685 _osr_entry_point = NULL; |
686 _exception_cache = NULL; | |
687 _pc_desc_cache.reset_to(NULL); | |
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688 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
0 | 689 |
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690 code_buffer->copy_values_to(this); |
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691 if (ScavengeRootsInCode) { |
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692 if (detect_scavenge_root_oops()) { |
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693 CodeCache::add_scavenge_root_nmethod(this); |
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694 } |
12080 | 695 Universe::heap()->register_nmethod(this); |
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696 } |
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697 debug_only(verify_scavenge_root_oops()); |
0 | 698 CodeCache::commit(this); |
699 } | |
700 | |
701 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
702 ttyLocker ttyl; // keep the following output all in one block | |
703 // This output goes directly to the tty, not the compiler log. | |
704 // To enable tools to match it up with the compilation activity, | |
705 // be sure to tag this tty output with the compile ID. | |
706 if (xtty != NULL) { | |
707 xtty->begin_head("print_native_nmethod"); | |
708 xtty->method(_method); | |
709 xtty->stamp(); | |
710 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
711 } | |
712 // print the header part first | |
713 print(); | |
714 // then print the requested information | |
715 if (PrintNativeNMethods) { | |
716 print_code(); | |
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717 if (oop_maps != NULL) { |
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718 oop_maps->print(); |
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719 } |
0 | 720 } |
721 if (PrintRelocations) { | |
722 print_relocations(); | |
723 } | |
724 if (xtty != NULL) { | |
725 xtty->tail("print_native_nmethod"); | |
726 } | |
727 } | |
728 } | |
729 | |
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730 // For dtrace wrappers |
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731 #ifdef HAVE_DTRACE_H |
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732 nmethod::nmethod( |
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733 Method* method, |
116
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734 int nmethod_size, |
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735 CodeOffsets* offsets, |
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736 CodeBuffer* code_buffer, |
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737 int frame_size) |
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738 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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739 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 740 _native_receiver_sp_offset(in_ByteSize(-1)), |
741 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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742 { |
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743 { |
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744 debug_only(No_Safepoint_Verifier nsv;) |
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745 assert_locked_or_safepoint(CodeCache_lock); |
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746 |
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747 init_defaults(); |
116
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748 _method = method; |
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749 _entry_bci = InvocationEntryBci; |
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750 // We have no exception handler or deopt handler make the |
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751 // values something that will never match a pc like the nmethod vtable entry |
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752 _exception_offset = 0; |
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753 _deoptimize_offset = 0; |
1204 | 754 _deoptimize_mh_offset = 0; |
1378
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755 _unwind_handler_offset = -1; |
116
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756 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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757 _orig_pc_offset = 0; |
1748 | 758 _consts_offset = data_offset(); |
116
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759 _stub_offset = data_offset(); |
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760 _oops_offset = data_offset(); |
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761 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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762 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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763 _scopes_pcs_offset = _scopes_data_offset; |
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764 _dependencies_offset = _scopes_pcs_offset; |
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765 _handler_table_offset = _dependencies_offset; |
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766 _nul_chk_table_offset = _handler_table_offset; |
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767 _nmethod_end_offset = _nul_chk_table_offset; |
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768 _compile_id = 0; // default |
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769 _comp_level = CompLevel_none; |
1748 | 770 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
771 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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772 _osr_entry_point = NULL; |
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773 _exception_cache = NULL; |
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774 _pc_desc_cache.reset_to(NULL); |
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775 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
116
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776 |
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777 code_buffer->copy_values_to(this); |
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778 if (ScavengeRootsInCode) { |
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779 if (detect_scavenge_root_oops()) { |
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780 CodeCache::add_scavenge_root_nmethod(this); |
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781 } |
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782 Universe::heap()->register_nmethod(this); |
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783 } |
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784 DEBUG_ONLY(verify_scavenge_root_oops();) |
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785 CodeCache::commit(this); |
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786 } |
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787 |
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788 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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789 ttyLocker ttyl; // keep the following output all in one block |
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790 // This output goes directly to the tty, not the compiler log. |
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791 // To enable tools to match it up with the compilation activity, |
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792 // be sure to tag this tty output with the compile ID. |
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793 if (xtty != NULL) { |
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794 xtty->begin_head("print_dtrace_nmethod"); |
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795 xtty->method(_method); |
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796 xtty->stamp(); |
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797 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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798 } |
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799 // print the header part first |
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800 print(); |
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801 // then print the requested information |
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802 if (PrintNMethods) { |
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803 print_code(); |
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804 } |
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805 if (PrintRelocations) { |
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806 print_relocations(); |
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807 } |
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808 if (xtty != NULL) { |
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809 xtty->tail("print_dtrace_nmethod"); |
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810 } |
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811 } |
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812 } |
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813 #endif // def HAVE_DTRACE_H |
0 | 814 |
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815 void* nmethod::operator new(size_t size, int nmethod_size) throw() { |
10114
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816 // Not critical, may return null if there is too little continuous memory |
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817 return CodeCache::allocate(nmethod_size); |
0 | 818 } |
819 | |
820 nmethod::nmethod( | |
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821 Method* method, |
0 | 822 int nmethod_size, |
823 int compile_id, | |
824 int entry_bci, | |
825 CodeOffsets* offsets, | |
826 int orig_pc_offset, | |
827 DebugInformationRecorder* debug_info, | |
828 Dependencies* dependencies, | |
829 CodeBuffer *code_buffer, | |
830 int frame_size, | |
831 OopMapSet* oop_maps, | |
832 ExceptionHandlerTable* handler_table, | |
833 ImplicitExceptionTable* nul_chk_table, | |
834 AbstractCompiler* compiler, | |
835 int comp_level | |
836 ) | |
837 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
838 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 839 _native_receiver_sp_offset(in_ByteSize(-1)), |
840 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 841 { |
842 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
843 { | |
844 debug_only(No_Safepoint_Verifier nsv;) | |
845 assert_locked_or_safepoint(CodeCache_lock); | |
846 | |
1644
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847 init_defaults(); |
0 | 848 _method = method; |
1644
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849 _entry_bci = entry_bci; |
0 | 850 _compile_id = compile_id; |
851 _comp_level = comp_level; | |
852 _compiler = compiler; | |
853 _orig_pc_offset = orig_pc_offset; | |
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854 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
1748 | 855 |
856 // Section offsets | |
1762
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857 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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858 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 859 |
860 // Exception handler and deopt handler are in the stub section | |
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861 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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862 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 863 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
864 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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865 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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866 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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867 } else { |
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868 _deoptimize_mh_offset = -1; |
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869 } |
1378
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870 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 871 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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872 } else { |
1748 | 873 _unwind_handler_offset = -1; |
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874 } |
1748 | 875 |
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876 _oops_offset = data_offset(); |
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877 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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878 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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879 |
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880 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 881 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
882 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
883 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
884 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
885 | |
1748 | 886 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
887 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
888 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 889 _exception_cache = NULL; |
890 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
891 | |
892 // Copy contents of ScopeDescRecorder to nmethod | |
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893 code_buffer->copy_values_to(this); |
0 | 894 debug_info->copy_to(this); |
895 dependencies->copy_to(this); | |
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896 if (ScavengeRootsInCode) { |
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897 if (detect_scavenge_root_oops()) { |
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898 CodeCache::add_scavenge_root_nmethod(this); |
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899 } |
12080 | 900 Universe::heap()->register_nmethod(this); |
989
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901 } |
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902 debug_only(verify_scavenge_root_oops()); |
0 | 903 |
904 CodeCache::commit(this); | |
905 | |
906 // Copy contents of ExceptionHandlerTable to nmethod | |
907 handler_table->copy_to(this); | |
908 nul_chk_table->copy_to(this); | |
909 | |
910 // we use the information of entry points to find out if a method is | |
911 // static or non static | |
912 assert(compiler->is_c2() || | |
913 _method->is_static() == (entry_point() == _verified_entry_point), | |
914 " entry points must be same for static methods and vice versa"); | |
915 } | |
916 | |
100
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917 bool printnmethods = PrintNMethods |
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918 || CompilerOracle::should_print(_method) |
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919 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 920 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
921 print_nmethod(printnmethods); | |
922 } | |
923 } | |
924 | |
925 | |
926 // Print a short set of xml attributes to identify this nmethod. The | |
927 // output should be embedded in some other element. | |
928 void nmethod::log_identity(xmlStream* log) const { | |
929 log->print(" compile_id='%d'", compile_id()); | |
930 const char* nm_kind = compile_kind(); | |
931 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
932 if (compiler() != NULL) { | |
933 log->print(" compiler='%s'", compiler()->name()); | |
934 } | |
1783 | 935 if (TieredCompilation) { |
936 log->print(" level='%d'", comp_level()); | |
937 } | |
0 | 938 } |
939 | |
940 | |
941 #define LOG_OFFSET(log, name) \ | |
942 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
943 log->print(" " XSTR(name) "_offset='%d'" , \ | |
944 (intptr_t)name##_begin() - (intptr_t)this) | |
945 | |
946 | |
947 void nmethod::log_new_nmethod() const { | |
948 if (LogCompilation && xtty != NULL) { | |
949 ttyLocker ttyl; | |
950 HandleMark hm; | |
951 xtty->begin_elem("nmethod"); | |
952 log_identity(xtty); | |
1748 | 953 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 954 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
955 | |
956 LOG_OFFSET(xtty, relocation); | |
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957 LOG_OFFSET(xtty, consts); |
1748 | 958 LOG_OFFSET(xtty, insts); |
0 | 959 LOG_OFFSET(xtty, stub); |
960 LOG_OFFSET(xtty, scopes_data); | |
961 LOG_OFFSET(xtty, scopes_pcs); | |
962 LOG_OFFSET(xtty, dependencies); | |
963 LOG_OFFSET(xtty, handler_table); | |
964 LOG_OFFSET(xtty, nul_chk_table); | |
965 LOG_OFFSET(xtty, oops); | |
966 | |
967 xtty->method(method()); | |
968 xtty->stamp(); | |
969 xtty->end_elem(); | |
970 } | |
971 } | |
972 | |
973 #undef LOG_OFFSET | |
974 | |
975 | |
976 // Print out more verbose output usually for a newly created nmethod. | |
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977 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 978 if (st != NULL) { |
979 ttyLocker ttyl; | |
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980 if (WizardMode) { |
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981 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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982 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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983 } else { |
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984 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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985 } |
0 | 986 } |
987 } | |
988 | |
989 | |
990 void nmethod::print_nmethod(bool printmethod) { | |
991 ttyLocker ttyl; // keep the following output all in one block | |
992 if (xtty != NULL) { | |
993 xtty->begin_head("print_nmethod"); | |
994 xtty->stamp(); | |
995 xtty->end_head(); | |
996 } | |
997 // print the header part first | |
998 print(); | |
999 // then print the requested information | |
1000 if (printmethod) { | |
1001 print_code(); | |
1002 print_pcs(); | |
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1003 if (oop_maps()) { |
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1004 oop_maps()->print(); |
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1005 } |
0 | 1006 } |
1007 if (PrintDebugInfo) { | |
1008 print_scopes(); | |
1009 } | |
1010 if (PrintRelocations) { | |
1011 print_relocations(); | |
1012 } | |
1013 if (PrintDependencies) { | |
1014 print_dependencies(); | |
1015 } | |
1016 if (PrintExceptionHandlers) { | |
1017 print_handler_table(); | |
1018 print_nul_chk_table(); | |
1019 } | |
1020 if (xtty != NULL) { | |
1021 xtty->tail("print_nmethod"); | |
1022 } | |
1023 } | |
1024 | |
1025 | |
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1026 // Promote one word from an assembly-time handle to a live embedded oop. |
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1027 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1028 if (handle == NULL || |
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1029 // As a special case, IC oops are initialized to 1 or -1. |
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1030 handle == (jobject) Universe::non_oop_word()) { |
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1031 (*dest) = (oop) handle; |
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1032 } else { |
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1033 (*dest) = JNIHandles::resolve_non_null(handle); |
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1034 } |
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1035 } |
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1036 |
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1037 |
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1038 // Have to have the same name because it's called by a template |
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1039 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1040 int length = array->length(); |
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1041 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1042 oop* dest = oops_begin(); |
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1043 for (int index = 0 ; index < length; index++) { |
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1044 initialize_immediate_oop(&dest[index], array->at(index)); |
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1045 } |
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1046 |
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1047 // Now we can fix up all the oops in the code. We need to do this |
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1048 // in the code because the assembler uses jobjects as placeholders. |
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1049 // The code and relocations have already been initialized by the |
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1050 // CodeBlob constructor, so it is valid even at this early point to |
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1051 // iterate over relocations and patch the code. |
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1052 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1053 } |
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1054 |
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1055 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1056 int length = array->length(); |
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1057 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1058 Metadata** dest = metadata_begin(); |
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1059 for (int index = 0 ; index < length; index++) { |
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1060 dest[index] = array->at(index); |
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1061 } |
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1062 } |
1563
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1063 |
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1064 bool nmethod::is_at_poll_return(address pc) { |
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1065 RelocIterator iter(this, pc, pc+1); |
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1066 while (iter.next()) { |
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1067 if (iter.type() == relocInfo::poll_return_type) |
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1068 return true; |
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1069 } |
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1070 return false; |
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1071 } |
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1072 |
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1073 |
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1074 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1075 RelocIterator iter(this, pc, pc+1); |
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1076 while (iter.next()) { |
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1077 relocInfo::relocType t = iter.type(); |
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1078 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1079 return true; |
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1080 } |
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1081 return false; |
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1082 } |
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1083 |
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1084 |
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1085 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1086 // re-patch all oop-bearing instructions, just in case some oops moved |
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1087 RelocIterator iter(this, begin, end); |
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1088 while (iter.next()) { |
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1089 if (iter.type() == relocInfo::oop_type) { |
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1090 oop_Relocation* reloc = iter.oop_reloc(); |
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1091 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1092 oop* dest = reloc->oop_addr(); |
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1093 initialize_immediate_oop(dest, (jobject) *dest); |
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1094 } |
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1095 // Refresh the oop-related bits of this instruction. |
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1096 reloc->fix_oop_relocation(); |
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1097 } else if (iter.type() == relocInfo::metadata_type) { |
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1098 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1099 reloc->fix_metadata_relocation(); |
1563
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1100 } |
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1101 } |
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1102 } |
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1103 |
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1104 |
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1105 void nmethod::verify_oop_relocations() { |
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1106 // Ensure sure that the code matches the current oop values |
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1107 RelocIterator iter(this, NULL, NULL); |
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1108 while (iter.next()) { |
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1109 if (iter.type() == relocInfo::oop_type) { |
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1110 oop_Relocation* reloc = iter.oop_reloc(); |
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1111 if (!reloc->oop_is_immediate()) { |
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1112 reloc->verify_oop_relocation(); |
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1113 } |
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1114 } |
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1115 } |
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1116 } |
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1117 |
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1118 |
0 | 1119 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1120 PcDesc* pd = pc_desc_at(pc); | |
1121 guarantee(pd != NULL, "scope must be present"); | |
1122 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1123 pd->obj_decode_offset(), pd->should_reexecute(), |
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1124 pd->return_oop()); |
0 | 1125 } |
1126 | |
1127 | |
1128 void nmethod::clear_inline_caches() { | |
1129 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1130 if (is_zombie()) { | |
1131 return; | |
1132 } | |
1133 | |
1134 RelocIterator iter(this); | |
1135 while (iter.next()) { | |
1136 iter.reloc()->clear_inline_cache(); | |
1137 } | |
1138 } | |
1139 | |
1140 | |
1141 void nmethod::cleanup_inline_caches() { | |
1142 | |
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1143 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1144 |
1145 // If the method is not entrant or zombie then a JMP is plastered over the | |
1146 // first few bytes. If an oop in the old code was there, that oop | |
1147 // should not get GC'd. Skip the first few bytes of oops on | |
1148 // not-entrant methods. | |
1149 address low_boundary = verified_entry_point(); | |
1150 if (!is_in_use()) { | |
1151 low_boundary += NativeJump::instruction_size; | |
1152 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1153 // This means that the low_boundary is going to be a little too high. | |
1154 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1155 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1156 } | |
1157 | |
1158 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1159 ResourceMark rm; | |
1160 RelocIterator iter(this, low_boundary); | |
1161 while(iter.next()) { | |
1162 switch(iter.type()) { | |
1163 case relocInfo::virtual_call_type: | |
1164 case relocInfo::opt_virtual_call_type: { | |
1165 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1166 // Ok, to lookup references to zombies here | |
1167 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1168 if( cb != NULL && cb->is_nmethod() ) { | |
1169 nmethod* nm = (nmethod*)cb; | |
1170 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1171 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1172 } |
1173 break; | |
1174 } | |
1175 case relocInfo::static_call_type: { | |
1176 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1177 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1178 if( cb != NULL && cb->is_nmethod() ) { | |
1179 nmethod* nm = (nmethod*)cb; | |
1180 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1181 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1182 } |
1183 break; | |
1184 } | |
1185 } | |
1186 } | |
1187 } | |
1188 | |
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1189 // This is a private interface with the sweeper. |
0 | 1190 void nmethod::mark_as_seen_on_stack() { |
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1191 assert(is_alive(), "Must be an alive method"); |
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1192 // Set the traversal mark to ensure that the sweeper does 2 |
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1193 // cleaning passes before moving to zombie. |
0 | 1194 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1195 } | |
1196 | |
2342
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1197 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1198 // there are no activations on the stack, not in use by the VM, |
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1199 // and not in use by the ServiceThread) |
0 | 1200 bool nmethod::can_not_entrant_be_converted() { |
1201 assert(is_not_entrant(), "must be a non-entrant method"); | |
1202 | |
1203 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1204 // count can be greater than the stack traversal count before it hits the | |
1205 // nmethod for the second time. | |
2342
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1206 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1207 !is_locked_by_vm(); |
0 | 1208 } |
1209 | |
1210 void nmethod::inc_decompile_count() { | |
1783 | 1211 if (!is_compiled_by_c2()) return; |
0 | 1212 // Could be gated by ProfileTraps, but do not bother... |
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1213 Method* m = method(); |
0 | 1214 if (m == NULL) return; |
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1215 MethodData* mdo = m->method_data(); |
0 | 1216 if (mdo == NULL) return; |
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1217 // There is a benign race here. See comments in methodData.hpp. |
0 | 1218 mdo->inc_decompile_count(); |
1219 } | |
1220 | |
1221 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1222 | |
1223 post_compiled_method_unload(); | |
1224 | |
1225 // Since this nmethod is being unloaded, make sure that dependencies | |
1226 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1227 // indicate that this work is being done during a GC. | |
1228 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1229 assert(is_alive != NULL, "Should be non-NULL"); | |
1230 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1231 flush_dependencies(is_alive); | |
1232 | |
1233 // Break cycle between nmethod & method | |
1234 if (TraceClassUnloading && WizardMode) { | |
1235 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
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1236 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1237 "), cause(" INTPTR_FORMAT ")", |
1238 this, (address)_method, (address)cause); | |
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1239 if (!Universe::heap()->is_gc_active()) |
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1240 cause->klass()->print(); |
0 | 1241 } |
941 | 1242 // Unlink the osr method, so we do not look this up again |
1243 if (is_osr_method()) { | |
1244 invalidate_osr_method(); | |
1245 } | |
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1246 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1247 // so we don't have to break the cycle. Note that it is possible to |
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1248 // have the Method* live here, in case we unload the nmethod because |
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1249 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1250 if (_method != NULL) { |
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1251 // OSR methods point to the Method*, but the Method* does not |
0 | 1252 // point back! |
1253 if (_method->code() == this) { | |
1254 _method->clear_code(); // Break a cycle | |
1255 } | |
1256 _method = NULL; // Clear the method of this dead nmethod | |
1257 } | |
1258 // Make the class unloaded - i.e., change state and notify sweeper | |
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1259 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1260 if (is_in_use()) { |
1261 // Transitioning directly from live to unloaded -- so | |
1262 // we need to force a cache clean-up; remember this | |
1263 // for later on. | |
1264 CodeCache::set_needs_cache_clean(true); | |
1265 } | |
1644
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1266 _state = unloaded; |
0 | 1267 |
1109
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1268 // Log the unloading. |
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|
1269 log_state_change(); |
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1270 |
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1271 // The Method* is gone at this point |
0 | 1272 assert(_method == NULL, "Tautology"); |
1273 | |
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1274 set_osr_link(NULL); |
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1275 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
13074
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1276 NMethodSweeper::report_state_change(this); |
0 | 1277 } |
1278 | |
1279 void nmethod::invalidate_osr_method() { | |
1280 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1281 // Remove from list of active nmethods | |
1282 if (method() != NULL) | |
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1283 method()->method_holder()->remove_osr_nmethod(this); |
0 | 1284 // Set entry as invalid |
1285 _entry_bci = InvalidOSREntryBci; | |
1286 } | |
1287 | |
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1288 void nmethod::log_state_change() const { |
0 | 1289 if (LogCompilation) { |
1290 if (xtty != NULL) { | |
1291 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1292 if (_state == unloaded) { |
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1293 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1294 os::current_thread_id()); |
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1295 } else { |
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1296 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1297 os::current_thread_id(), |
1644
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1298 (_state == zombie ? " zombie='1'" : "")); |
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1299 } |
0 | 1300 log_identity(xtty); |
1301 xtty->stamp(); | |
1302 xtty->end_elem(); | |
1303 } | |
1304 } | |
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1305 if (PrintCompilation && _state != unloaded) { |
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1306 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1307 } |
1308 } | |
1309 | |
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1310 /** |
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1311 * Common functionality for both make_not_entrant and make_zombie |
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1312 */ |
1141 | 1313 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1314 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
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1315 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1316 |
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1317 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1318 nmethodLocker nml(this); |
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1319 methodHandle the_method(method()); |
1726 | 1320 No_Safepoint_Verifier nsv; |
0 | 1321 |
12080 | 1322 // during patching, depending on the nmethod state we must notify the GC that |
1323 // code has been unloaded, unregistering it. We cannot do this right while | |
1324 // holding the Patching_lock because we need to use the CodeCache_lock. This | |
1325 // would be prone to deadlocks. | |
1326 // This flag is used to remember whether we need to later lock and unregister. | |
1327 bool nmethod_needs_unregister = false; | |
1328 | |
0 | 1329 { |
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1330 // invalidate osr nmethod before acquiring the patching lock since |
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1331 // they both acquire leaf locks and we don't want a deadlock. |
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1332 // This logic is equivalent to the logic below for patching the |
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1333 // verified entry point of regular methods. |
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1334 if (is_osr_method()) { |
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1335 // this effectively makes the osr nmethod not entrant |
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1336 invalidate_osr_method(); |
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1337 } |
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1338 |
0 | 1339 // Enter critical section. Does not block for safepoint. |
1340 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1341 |
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1342 if (_state == state) { |
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1343 // another thread already performed this transition so nothing |
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1344 // to do, but return false to indicate this. |
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1345 return false; |
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1346 } |
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1347 |
0 | 1348 // The caller can be calling the method statically or through an inline |
1349 // cache call. | |
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1350 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1351 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1352 SharedRuntime::get_handle_wrong_method_stub()); | |
1353 } | |
1354 | |
1644
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1355 if (is_in_use()) { |
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1356 // It's a true state change, so mark the method as decompiled. |
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1357 // Do it only for transition from alive. |
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1358 inc_decompile_count(); |
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1359 } |
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1360 |
12080 | 1361 // If the state is becoming a zombie, signal to unregister the nmethod with |
1362 // the heap. | |
1363 // This nmethod may have already been unloaded during a full GC. | |
1364 if ((state == zombie) && !is_unloaded()) { | |
1365 nmethod_needs_unregister = true; | |
1366 } | |
1367 | |
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1368 // Must happen before state change. Otherwise we have a race condition in |
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1369 // nmethod::can_not_entrant_be_converted(). I.e., a method can immediately |
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1370 // transition its state from 'not_entrant' to 'zombie' without having to wait |
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1371 // for stack scanning. |
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1372 if (state == not_entrant) { |
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1373 mark_as_seen_on_stack(); |
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1374 OrderAccess::storestore(); |
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1375 } |
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1376 |
0 | 1377 // Change state |
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1378 _state = state; |
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1379 |
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1380 // Log the transition once |
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1381 log_state_change(); |
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1382 |
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1383 // Remove nmethod from method. |
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1384 // We need to check if both the _code and _from_compiled_code_entry_point |
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1385 // refer to this nmethod because there is a race in setting these two fields |
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1386 // in Method* as seen in bugid 4947125. |
1644
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1387 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1388 // could be flushed and the compiler and vtable stubs could still call |
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1389 // through it. |
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1390 if (method() != NULL && (method()->code() == this || |
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1391 method()->from_compiled_entry() == verified_entry_point())) { |
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1392 HandleMark hm; |
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1393 method()->clear_code(); |
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1394 } |
0 | 1395 } // leave critical region under Patching_lock |
1396 | |
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1397 // When the nmethod becomes zombie it is no longer alive so the |
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1398 // dependencies must be flushed. nmethods in the not_entrant |
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1399 // state will be flushed later when the transition to zombie |
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1400 // happens or they get unloaded. |
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1401 if (state == zombie) { |
1726 | 1402 { |
1403 // Flushing dependecies must be done before any possible | |
1404 // safepoint can sneak in, otherwise the oops used by the | |
1405 // dependency logic could have become stale. | |
1406 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
12080 | 1407 if (nmethod_needs_unregister) { |
1408 Universe::heap()->unregister_nmethod(this); | |
1409 } | |
1726 | 1410 flush_dependencies(NULL); |
1411 } | |
1644
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1412 |
2342
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1413 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1414 // event and it hasn't already been reported for this nmethod then |
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1415 // report it now. The event may have been reported earilier if the GC |
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1416 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1417 // we no longer go to a safepoint here. |
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1418 post_compiled_method_unload(); |
1726 | 1419 |
1420 #ifdef ASSERT | |
1421 // It's no longer safe to access the oops section since zombie | |
1422 // nmethods aren't scanned for GC. | |
1423 _oops_are_stale = true; | |
1424 #endif | |
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1425 // the Method may be reclaimed by class unloading now that the |
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1426 // nmethod is in zombie state |
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1427 set_method(NULL); |
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1428 } else { |
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1429 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1430 } |
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1431 |
0 | 1432 if (TraceCreateZombies) { |
1433 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1434 } | |
1435 | |
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1436 NMethodSweeper::report_state_change(this); |
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1437 return true; |
0 | 1438 } |
1439 | |
1440 void nmethod::flush() { | |
1441 // Note that there are no valid oops in the nmethod anymore. | |
1442 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1443 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1444 | |
1445 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1446 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1447 |
1448 // completely deallocate this method | |
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1449 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1450 if (PrintMethodFlushing) { |
1202 | 1451 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1452 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1453 } |
1454 | |
1455 // We need to deallocate any ExceptionCache data. | |
1456 // Note that we do not need to grab the nmethod lock for this, it | |
1457 // better be thread safe if we're disposing of it! | |
1458 ExceptionCache* ec = exception_cache(); | |
1459 set_exception_cache(NULL); | |
1460 while(ec != NULL) { | |
1461 ExceptionCache* next = ec->next(); | |
1462 delete ec; | |
1463 ec = next; | |
1464 } | |
1465 | |
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1466 if (on_scavenge_root_list()) { |
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1467 CodeCache::drop_scavenge_root_nmethod(this); |
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1468 } |
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1469 |
1692 | 1470 #ifdef SHARK |
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1471 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1472 #endif // SHARK |
1473 | |
0 | 1474 ((CodeBlob*)(this))->flush(); |
1475 | |
1476 CodeCache::free(this); | |
1477 } | |
1478 | |
1479 | |
1480 // | |
1481 // Notify all classes this nmethod is dependent on that it is no | |
1482 // longer dependent. This should only be called in two situations. | |
1483 // First, when a nmethod transitions to a zombie all dependents need | |
1484 // to be clear. Since zombification happens at a safepoint there's no | |
1485 // synchronization issues. The second place is a little more tricky. | |
1486 // During phase 1 of mark sweep class unloading may happen and as a | |
1487 // result some nmethods may get unloaded. In this case the flushing | |
1488 // of dependencies must happen during phase 1 since after GC any | |
1489 // dependencies in the unloaded nmethod won't be updated, so | |
1490 // traversing the dependency information in unsafe. In that case this | |
1491 // function is called with a non-NULL argument and this function only | |
1492 // notifies instanceKlasses that are reachable | |
1493 | |
1494 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1495 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1496 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1497 "is_alive is non-NULL if and only if we are called during GC"); | |
1498 if (!has_flushed_dependencies()) { | |
1499 set_has_flushed_dependencies(); | |
1500 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1501 Klass* klass = deps.context_type(); |
0 | 1502 if (klass == NULL) continue; // ignore things like evol_method |
1503 | |
1504 // During GC the is_alive closure is non-NULL, and is used to | |
1505 // determine liveness of dependees that need to be updated. | |
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1506 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1507 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1508 } |
1509 } | |
1510 } | |
1511 } | |
1512 | |
1513 | |
1514 // If this oop is not live, the nmethod can be unloaded. | |
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1515 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { |
0 | 1516 assert(root != NULL, "just checking"); |
1517 oop obj = *root; | |
1518 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1519 return false; | |
1520 } | |
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1521 |
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1522 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1523 // simply because one of its constant oops has gone dead. |
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1524 // No actual classes need to be unloaded in order for this to occur. |
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1525 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1526 make_unloaded(is_alive, obj); |
1527 return true; | |
1528 } | |
1529 | |
1530 // ------------------------------------------------------------------ | |
1531 // post_compiled_method_load_event | |
1532 // new method for install_code() path | |
1533 // Transfer information from compilation to jvmti | |
1534 void nmethod::post_compiled_method_load_event() { | |
1535 | |
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1536 Method* moop = method(); |
4006 | 1537 #ifndef USDT2 |
0 | 1538 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1539 moop->klass_name()->bytes(), | |
1540 moop->klass_name()->utf8_length(), | |
1541 moop->name()->bytes(), | |
1542 moop->name()->utf8_length(), | |
1543 moop->signature()->bytes(), | |
1544 moop->signature()->utf8_length(), | |
1748 | 1545 insts_begin(), insts_size()); |
4006 | 1546 #else /* USDT2 */ |
1547 HOTSPOT_COMPILED_METHOD_LOAD( | |
1548 (char *) moop->klass_name()->bytes(), | |
1549 moop->klass_name()->utf8_length(), | |
1550 (char *) moop->name()->bytes(), | |
1551 moop->name()->utf8_length(), | |
1552 (char *) moop->signature()->bytes(), | |
1553 moop->signature()->utf8_length(), | |
1554 insts_begin(), insts_size()); | |
1555 #endif /* USDT2 */ | |
0 | 1556 |
1616
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1557 if (JvmtiExport::should_post_compiled_method_load() || |
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1558 JvmtiExport::should_post_compiled_method_unload()) { |
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1559 get_and_cache_jmethod_id(); |
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1560 } |
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1561 |
0 | 1562 if (JvmtiExport::should_post_compiled_method_load()) { |
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1563 // Let the Service thread (which is a real Java thread) post the event |
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1564 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1565 JvmtiDeferredEventQueue::enqueue( |
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1566 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1567 } |
1568 } | |
1569 | |
1616
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1570 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1571 if (_jmethod_id == NULL) { |
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1572 // Cache the jmethod_id since it can no longer be looked up once the |
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1573 // method itself has been marked for unloading. |
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1574 _jmethod_id = method()->jmethod_id(); |
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1575 } |
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1576 return _jmethod_id; |
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1577 } |
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1578 |
0 | 1579 void nmethod::post_compiled_method_unload() { |
1577
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1580 if (unload_reported()) { |
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1581 // During unloading we transition to unloaded and then to zombie |
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1582 // and the unloading is reported during the first transition. |
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1583 return; |
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1584 } |
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1585 |
0 | 1586 assert(_method != NULL && !is_unloaded(), "just checking"); |
1587 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1588 | |
1589 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1590 // post the event. Sometime later this nmethod will be made a zombie |
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1591 // by the sweeper but the Method* will not be valid at that point. |
1616
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1592 // If the _jmethod_id is null then no load event was ever requested |
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1593 // so don't bother posting the unload. The main reason for this is |
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1594 // that the jmethodID is a weak reference to the Method* so if |
1616
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1595 // it's being unloaded there's no way to look it up since the weak |
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1596 // ref will have been cleared. |
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1597 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1598 assert(!unload_reported(), "already unloaded"); |
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1599 JvmtiDeferredEvent event = |
2342
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7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
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1600 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1601 _jmethod_id, insts_begin()); |
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1602 if (SafepointSynchronize::is_at_safepoint()) { |
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1603 // Don't want to take the queueing lock. Add it as pending and |
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1604 // it will get enqueued later. |
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1605 JvmtiDeferredEventQueue::add_pending_event(event); |
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1606 } else { |
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1607 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1608 JvmtiDeferredEventQueue::enqueue(event); |
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1609 } |
0 | 1610 } |
1611 | |
1612 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1613 // any time. As the nmethod is being unloaded now we mark it has | |
1614 // having the unload event reported - this will ensure that we don't | |
1615 // attempt to report the event in the unlikely scenario where the | |
1616 // event is enabled at the time the nmethod is made a zombie. | |
1617 set_unload_reported(); | |
1618 } | |
1619 | |
1620 // This is called at the end of the strong tracing/marking phase of a | |
1621 // GC to unload an nmethod if it contains otherwise unreachable | |
1622 // oops. | |
1623 | |
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1624 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 1625 // Make sure the oop's ready to receive visitors |
1626 assert(!is_zombie() && !is_unloaded(), | |
1627 "should not call follow on zombie or unloaded nmethod"); | |
1628 | |
1629 // If the method is not entrant then a JMP is plastered over the | |
1630 // first few bytes. If an oop in the old code was there, that oop | |
1631 // should not get GC'd. Skip the first few bytes of oops on | |
1632 // not-entrant methods. | |
1633 address low_boundary = verified_entry_point(); | |
1634 if (is_not_entrant()) { | |
1635 low_boundary += NativeJump::instruction_size; | |
1636 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1637 // (See comment above.) | |
1638 } | |
1639 | |
1640 // The RedefineClasses() API can cause the class unloading invariant | |
1641 // to no longer be true. See jvmtiExport.hpp for details. | |
1642 // Also, leave a debugging breadcrumb in local flag. | |
1643 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1644 if (a_class_was_redefined) { | |
1645 // This set of the unloading_occurred flag is done before the | |
1646 // call to post_compiled_method_unload() so that the unloading | |
1647 // of this nmethod is reported. | |
1648 unloading_occurred = true; | |
1649 } | |
1650 | |
1651 // Exception cache | |
1652 ExceptionCache* ec = exception_cache(); | |
1653 while (ec != NULL) { | |
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1654 Klass* ex_klass = ec->exception_type(); |
0 | 1655 ExceptionCache* next_ec = ec->next(); |
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1656 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1657 remove_from_exception_cache(ec); |
1658 } | |
1659 ec = next_ec; | |
1660 } | |
1661 | |
1662 // If class unloading occurred we first iterate over all inline caches and | |
1663 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1664 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1665 // iteration below. | |
1666 if (unloading_occurred) { | |
1667 RelocIterator iter(this, low_boundary); | |
1668 while(iter.next()) { | |
1669 if (iter.type() == relocInfo::virtual_call_type) { | |
1670 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1671 if (ic->is_icholder_call()) { |
0 | 1672 // The only exception is compiledICHolder oops which may |
1673 // yet be marked below. (We check this further below). | |
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1674 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1675 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1676 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
13441 | 1677 continue; |
1678 } | |
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1679 } else { |
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1680 Metadata* ic_oop = ic->cached_metadata(); |
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1681 if (ic_oop != NULL) { |
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1682 if (ic_oop->is_klass()) { |
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1683 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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|
1684 continue; |
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|
1685 } |
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|
1686 } else if (ic_oop->is_method()) { |
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1687 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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|
1688 continue; |
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|
1689 } |
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|
1690 } else { |
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|
1691 ShouldNotReachHere(); |
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|
1692 } |
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|
1693 } |
13441 | 1694 } |
1695 ic->set_to_clean(); | |
0 | 1696 } |
1697 } | |
1698 } | |
1699 | |
1700 // Compiled code | |
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1701 { |
0 | 1702 RelocIterator iter(this, low_boundary); |
1703 while (iter.next()) { | |
1704 if (iter.type() == relocInfo::oop_type) { | |
1705 oop_Relocation* r = iter.oop_reloc(); | |
1706 // In this loop, we must only traverse those oops directly embedded in | |
1707 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1708 assert(1 == (r->oop_is_immediate()) + | |
1709 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1710 "oop must be found in exactly one place"); | |
1711 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
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1712 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
0 | 1713 return; |
1714 } | |
1715 } | |
1716 } | |
1717 } | |
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1718 } |
0 | 1719 |
1720 | |
1721 // Scopes | |
1722 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1723 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
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1724 if (can_unload(is_alive, p, unloading_occurred)) { |
0 | 1725 return; |
1726 } | |
1727 } | |
1728 | |
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1729 // Ensure that all metadata is still alive |
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1730 verify_metadata_loaders(low_boundary, is_alive); |
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1731 } |
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1732 |
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1733 #ifdef ASSERT |
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1734 |
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1735 class CheckClass : AllStatic { |
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1736 static BoolObjectClosure* _is_alive; |
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1737 |
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1738 // Check class_loader is alive for this bit of metadata. |
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1739 static void check_class(Metadata* md) { |
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1740 Klass* klass = NULL; |
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1741 if (md->is_klass()) { |
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1742 klass = ((Klass*)md); |
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1743 } else if (md->is_method()) { |
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1744 klass = ((Method*)md)->method_holder(); |
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1745 } else if (md->is_methodData()) { |
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1746 klass = ((MethodData*)md)->method()->method_holder(); |
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1747 } else { |
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1748 md->print(); |
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1749 ShouldNotReachHere(); |
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1750 } |
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1751 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1752 } |
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1753 public: |
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1754 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1755 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1756 _is_alive = is_alive; |
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1757 nm->metadata_do(check_class); |
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1758 } |
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1759 }; |
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1760 |
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1761 // This is called during a safepoint so can use static data |
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1762 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1763 #endif // ASSERT |
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1764 |
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1765 |
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1766 // Processing of oop references should have been sufficient to keep |
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1767 // all strong references alive. Any weak references should have been |
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1768 // cleared as well. Visit all the metadata and ensure that it's |
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1769 // really alive. |
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1770 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1771 #ifdef ASSERT |
0 | 1772 RelocIterator iter(this, low_boundary); |
1773 while (iter.next()) { | |
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1774 // static_stub_Relocations may have dangling references to |
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1775 // Method*s so trim them out here. Otherwise it looks like |
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1776 // compiled code is maintaining a link to dead metadata. |
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1777 address static_call_addr = NULL; |
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1778 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1779 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1780 if (!cic->is_call_to_interpreted()) { |
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1781 static_call_addr = iter.addr(); |
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1782 } |
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1783 } else if (iter.type() == relocInfo::static_call_type) { |
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1784 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1785 if (!csc->is_call_to_interpreted()) { |
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1786 static_call_addr = iter.addr(); |
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1787 } |
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1788 } |
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1789 if (static_call_addr != NULL) { |
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1790 RelocIterator sciter(this, low_boundary); |
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1791 while (sciter.next()) { |
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1792 if (sciter.type() == relocInfo::static_stub_type && |
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1793 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1794 sciter.static_stub_reloc()->clear_inline_cache(); |
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1795 } |
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1796 } |
0 | 1797 } |
1798 } | |
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1799 // Check that the metadata embedded in the nmethod is alive |
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1800 CheckClass::do_check_class(is_alive, this); |
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1801 #endif |
0 | 1802 } |
1803 | |
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1804 |
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1805 // Iterate over metadata calling this function. Used by RedefineClasses |
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1806 void nmethod::metadata_do(void f(Metadata*)) { |
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1807 address low_boundary = verified_entry_point(); |
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1808 if (is_not_entrant()) { |
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1809 low_boundary += NativeJump::instruction_size; |
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1810 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1811 // (See comment above.) |
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1812 } |
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1813 { |
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1814 // Visit all immediate references that are embedded in the instruction stream. |
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1815 RelocIterator iter(this, low_boundary); |
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1816 while (iter.next()) { |
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1817 if (iter.type() == relocInfo::metadata_type ) { |
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1818 metadata_Relocation* r = iter.metadata_reloc(); |
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1819 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1820 // the code. Other metadatas (oop_index>0) are seen as part of |
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1821 // the metadata section below. |
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1822 assert(1 == (r->metadata_is_immediate()) + |
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1823 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1824 "metadata must be found in exactly one place"); |
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1825 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1826 Metadata* md = r->metadata_value(); |
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1827 f(md); |
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1828 } |
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1829 } else if (iter.type() == relocInfo::virtual_call_type) { |
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1830 // Check compiledIC holders associated with this nmethod |
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1831 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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1832 if (ic->is_icholder_call()) { |
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1833 CompiledICHolder* cichk = ic->cached_icholder(); |
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1834 f(cichk->holder_method()); |
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1835 f(cichk->holder_klass()); |
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1836 } else { |
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1837 Metadata* ic_oop = ic->cached_metadata(); |
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1838 if (ic_oop != NULL) { |
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1839 f(ic_oop); |
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1840 } |
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1841 } |
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1842 } |
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1843 } |
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1844 } |
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1845 |
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1846 // Visit the metadata section |
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1847 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1848 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1849 Metadata* md = *p; |
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1850 f(md); |
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1851 } |
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1852 |
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1853 // Call function Method*, not embedded in these other places. |
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1854 if (_method != NULL) f(_method); |
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1855 } |
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1856 |
12080 | 1857 void nmethod::oops_do(OopClosure* f, bool allow_zombie) { |
0 | 1858 // make sure the oops ready to receive visitors |
12080 | 1859 assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod"); |
1860 assert(!is_unloaded(), "should not call follow on unloaded nmethod"); | |
0 | 1861 |
1862 // If the method is not entrant or zombie then a JMP is plastered over the | |
1863 // first few bytes. If an oop in the old code was there, that oop | |
1864 // should not get GC'd. Skip the first few bytes of oops on | |
1865 // not-entrant methods. | |
1866 address low_boundary = verified_entry_point(); | |
1867 if (is_not_entrant()) { | |
1868 low_boundary += NativeJump::instruction_size; | |
1869 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1870 // (See comment above.) | |
1871 } | |
1872 | |
1873 RelocIterator iter(this, low_boundary); | |
941 | 1874 |
0 | 1875 while (iter.next()) { |
1876 if (iter.type() == relocInfo::oop_type ) { | |
1877 oop_Relocation* r = iter.oop_reloc(); | |
1878 // In this loop, we must only follow those oops directly embedded in | |
1879 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1880 assert(1 == (r->oop_is_immediate()) + |
1881 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1882 "oop must be found in exactly one place"); | |
0 | 1883 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1884 f->do_oop(r->oop_addr()); | |
1885 } | |
1886 } | |
1887 } | |
1888 | |
1889 // Scopes | |
989
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1890 // This includes oop constants not inlined in the code stream. |
0 | 1891 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1892 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1893 f->do_oop(p); | |
1894 } | |
1895 } | |
1896 | |
989
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1897 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1898 |
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1899 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1900 |
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1901 // An nmethod is "marked" if its _mark_link is set non-null. |
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1902 // Even if it is the end of the linked list, it will have a non-null link value, |
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1903 // as long as it is on the list. |
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1904 // This code must be MP safe, because it is used from parallel GC passes. |
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1905 bool nmethod::test_set_oops_do_mark() { |
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1906 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1907 nmethod* observed_mark_link = _oops_do_mark_link; |
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1908 if (observed_mark_link == NULL) { |
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1909 // Claim this nmethod for this thread to mark. |
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1910 observed_mark_link = (nmethod*) |
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1911 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1912 if (observed_mark_link == NULL) { |
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1913 |
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1914 // Atomically append this nmethod (now claimed) to the head of the list: |
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1915 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1916 for (;;) { |
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1917 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1918 _oops_do_mark_link = required_mark_nmethods; |
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1919 observed_mark_nmethods = (nmethod*) |
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1920 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1921 if (observed_mark_nmethods == required_mark_nmethods) |
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1922 break; |
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1923 } |
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1924 // Mark was clear when we first saw this guy. |
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1925 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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1926 return false; |
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1927 } |
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1928 } |
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1929 // On fall through, another racing thread marked this nmethod before we did. |
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1930 return true; |
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1931 } |
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1932 |
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1933 void nmethod::oops_do_marking_prologue() { |
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1934 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1935 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1936 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1937 // may fork a bunch of threads, and we need them all to see the same state. |
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1938 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1939 guarantee(observed == NULL, "no races in this sequential code"); |
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1940 } |
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1941 |
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1942 void nmethod::oops_do_marking_epilogue() { |
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1943 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1944 nmethod* cur = _oops_do_mark_nmethods; |
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1945 while (cur != NMETHOD_SENTINEL) { |
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1946 assert(cur != NULL, "not NULL-terminated"); |
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1947 nmethod* next = cur->_oops_do_mark_link; |
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1948 cur->_oops_do_mark_link = NULL; |
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1949 cur->fix_oop_relocations(); |
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1950 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
989
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1951 cur = next; |
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1952 } |
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1953 void* required = _oops_do_mark_nmethods; |
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1954 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1955 guarantee(observed == required, "no races in this sequential code"); |
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1956 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1957 } |
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1958 |
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1959 class DetectScavengeRoot: public OopClosure { |
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1960 bool _detected_scavenge_root; |
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1961 public: |
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1962 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1963 { NOT_PRODUCT(_print_nm = NULL); } |
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1964 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1965 virtual void do_oop(oop* p) { |
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1966 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1967 NOT_PRODUCT(maybe_print(p)); |
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1968 _detected_scavenge_root = true; |
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1969 } |
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1970 } |
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1971 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1972 |
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1973 #ifndef PRODUCT |
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1974 nmethod* _print_nm; |
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1975 void maybe_print(oop* p) { |
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1976 if (_print_nm == NULL) return; |
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1977 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1978 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
989
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1979 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1980 (void *)(*p), (intptr_t)p); |
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1981 (*p)->print(); |
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1982 } |
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1983 #endif //PRODUCT |
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1984 }; |
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1985 |
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1986 bool nmethod::detect_scavenge_root_oops() { |
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1987 DetectScavengeRoot detect_scavenge_root; |
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1988 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1989 oops_do(&detect_scavenge_root); |
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1990 return detect_scavenge_root.detected_scavenge_root(); |
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1991 } |
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1992 |
0 | 1993 // Method that knows how to preserve outgoing arguments at call. This method must be |
1994 // called with a frame corresponding to a Java invoke | |
1995 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1996 #ifndef SHARK |
0 | 1997 if (!method()->is_native()) { |
1998 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1999 Bytecode_invoke call(ssd.method(), ssd.bci()); |
10390 | 2000 bool has_receiver = call.has_receiver(); |
2001 bool has_appendix = call.has_appendix(); | |
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2002 Symbol* signature = call.signature(); |
10390 | 2003 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f); |
0 | 2004 } |
1692 | 2005 #endif // !SHARK |
0 | 2006 } |
2007 | |
2008 | |
2009 oop nmethod::embeddedOop_at(u_char* p) { | |
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2010 RelocIterator iter(this, p, p + 1); |
0 | 2011 while (iter.next()) |
2012 if (iter.type() == relocInfo::oop_type) { | |
2013 return iter.oop_reloc()->oop_value(); | |
2014 } | |
2015 return NULL; | |
2016 } | |
2017 | |
2018 | |
2019 inline bool includes(void* p, void* from, void* to) { | |
2020 return from <= p && p < to; | |
2021 } | |
2022 | |
2023 | |
2024 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
2025 assert(count >= 2, "must be sentinel values, at least"); | |
2026 | |
2027 #ifdef ASSERT | |
2028 // must be sorted and unique; we do a binary search in find_pc_desc() | |
2029 int prev_offset = pcs[0].pc_offset(); | |
2030 assert(prev_offset == PcDesc::lower_offset_limit, | |
2031 "must start with a sentinel"); | |
2032 for (int i = 1; i < count; i++) { | |
2033 int this_offset = pcs[i].pc_offset(); | |
2034 assert(this_offset > prev_offset, "offsets must be sorted"); | |
2035 prev_offset = this_offset; | |
2036 } | |
2037 assert(prev_offset == PcDesc::upper_offset_limit, | |
2038 "must end with a sentinel"); | |
2039 #endif //ASSERT | |
2040 | |
1135
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2041 // Search for MethodHandle invokes and tag the nmethod. |
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2042 for (int i = 0; i < count; i++) { |
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2043 if (pcs[i].is_method_handle_invoke()) { |
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2044 set_has_method_handle_invokes(true); |
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2045 break; |
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|
2046 } |
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2047 } |
2083
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2048 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2049 |
0 | 2050 int size = count * sizeof(PcDesc); |
2051 assert(scopes_pcs_size() >= size, "oob"); | |
2052 memcpy(scopes_pcs_begin(), pcs, size); | |
2053 | |
2054 // Adjust the final sentinel downward. | |
2055 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2056 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2057 last_pc->set_pc_offset(content_size() + 1); |
0 | 2058 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2059 // Fill any rounding gaps with copies of the last record. | |
2060 last_pc[1] = last_pc[0]; | |
2061 } | |
2062 // The following assert could fail if sizeof(PcDesc) is not | |
2063 // an integral multiple of oopSize (the rounding term). | |
2064 // If it fails, change the logic to always allocate a multiple | |
2065 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2066 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2067 } | |
2068 | |
2069 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2070 assert(scopes_data_size() >= size, "oob"); | |
2071 memcpy(scopes_data_begin(), buffer, size); | |
2072 } | |
2073 | |
2074 | |
2075 #ifdef ASSERT | |
2076 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2077 PcDesc* lower = nm->scopes_pcs_begin(); | |
2078 PcDesc* upper = nm->scopes_pcs_end(); | |
2079 lower += 1; // exclude initial sentinel | |
2080 PcDesc* res = NULL; | |
2081 for (PcDesc* p = lower; p < upper; p++) { | |
2082 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2083 if (match_desc(p, pc_offset, approximate)) { | |
2084 if (res == NULL) | |
2085 res = p; | |
2086 else | |
2087 res = (PcDesc*) badAddress; | |
2088 } | |
2089 } | |
2090 return res; | |
2091 } | |
2092 #endif | |
2093 | |
2094 | |
2095 // Finds a PcDesc with real-pc equal to "pc" | |
2096 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2097 address base_address = code_begin(); |
0 | 2098 if ((pc < base_address) || |
2099 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2100 return NULL; // PC is wildly out of range | |
2101 } | |
2102 int pc_offset = (int) (pc - base_address); | |
2103 | |
2104 // Check the PcDesc cache if it contains the desired PcDesc | |
2105 // (This as an almost 100% hit rate.) | |
2106 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2107 if (res != NULL) { | |
2108 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2109 return res; | |
2110 } | |
2111 | |
2112 // Fallback algorithm: quasi-linear search for the PcDesc | |
2113 // Find the last pc_offset less than the given offset. | |
2114 // The successor must be the required match, if there is a match at all. | |
2115 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2116 PcDesc* lower = scopes_pcs_begin(); | |
2117 PcDesc* upper = scopes_pcs_end(); | |
2118 upper -= 1; // exclude final sentinel | |
2119 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2120 | |
2121 #define assert_LU_OK \ | |
2122 /* invariant on lower..upper during the following search: */ \ | |
2123 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2124 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2125 assert_LU_OK; | |
2126 | |
2127 // Use the last successful return as a split point. | |
2128 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2129 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2130 if (mid->pc_offset() < pc_offset) { | |
2131 lower = mid; | |
2132 } else { | |
2133 upper = mid; | |
2134 } | |
2135 | |
2136 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2137 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2138 const int RADIX = (1 << LOG2_RADIX); | |
2139 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2140 while ((mid = lower + step) < upper) { | |
2141 assert_LU_OK; | |
2142 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2143 if (mid->pc_offset() < pc_offset) { | |
2144 lower = mid; | |
2145 } else { | |
2146 upper = mid; | |
2147 break; | |
2148 } | |
2149 } | |
2150 assert_LU_OK; | |
2151 } | |
2152 | |
2153 // Sneak up on the value with a linear search of length ~16. | |
2154 while (true) { | |
2155 assert_LU_OK; | |
2156 mid = lower + 1; | |
2157 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2158 if (mid->pc_offset() < pc_offset) { | |
2159 lower = mid; | |
2160 } else { | |
2161 upper = mid; | |
2162 break; | |
2163 } | |
2164 } | |
2165 #undef assert_LU_OK | |
2166 | |
2167 if (match_desc(upper, pc_offset, approximate)) { | |
2168 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2169 _pc_desc_cache.add_pc_desc(upper); | |
2170 return upper; | |
2171 } else { | |
2172 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2173 return NULL; | |
2174 } | |
2175 } | |
2176 | |
2177 | |
2178 bool nmethod::check_all_dependencies() { | |
2179 bool found_check = false; | |
2180 // wholesale check of all dependencies | |
2181 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2182 if (deps.check_dependency() != NULL) { | |
2183 found_check = true; | |
2184 NOT_DEBUG(break); | |
2185 } | |
2186 } | |
2187 return found_check; // tell caller if we found anything | |
2188 } | |
2189 | |
2190 bool nmethod::check_dependency_on(DepChange& changes) { | |
2191 // What has happened: | |
2192 // 1) a new class dependee has been added | |
2193 // 2) dependee and all its super classes have been marked | |
2194 bool found_check = false; // set true if we are upset | |
2195 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2196 // Evaluate only relevant dependencies. | |
2197 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2198 found_check = true; | |
2199 NOT_DEBUG(break); | |
2200 } | |
2201 } | |
2202 return found_check; | |
2203 } | |
2204 | |
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2205 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2206 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2207 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2208 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2209 if (deps.type() == Dependencies::evol_method) { | |
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2210 Method* method = deps.method_argument(0); |
0 | 2211 for (int j = 0; j < dependee_methods->length(); j++) { |
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2212 if (dependee_methods->at(j) == method) { |
0 | 2213 // RC_TRACE macro has an embedded ResourceMark |
2214 RC_TRACE(0x01000000, | |
2215 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2216 _method->method_holder()->external_name(), |
0 | 2217 _method->name()->as_C_string(), |
2218 _method->signature()->as_C_string(), compile_id(), | |
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2219 method->method_holder()->external_name(), |
0 | 2220 method->name()->as_C_string(), |
2221 method->signature()->as_C_string())); | |
2222 if (TraceDependencies || LogCompilation) | |
2223 deps.log_dependency(dependee); | |
2224 return true; | |
2225 } | |
2226 } | |
2227 } | |
2228 } | |
2229 return false; | |
2230 } | |
2231 | |
2232 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2233 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2234 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2235 if (deps.type() != Dependencies::evol_method) | |
2236 continue; | |
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2237 Method* method = deps.method_argument(0); |
0 | 2238 if (method == dependee) return true; |
2239 } | |
2240 return false; | |
2241 } | |
2242 | |
2243 | |
2244 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2245 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2246 if (is_zombie()) { |
2247 // a zombie may never be patched | |
2248 return false; | |
2249 } | |
2250 return true; | |
2251 } | |
2252 | |
2253 | |
2254 address nmethod::continuation_for_implicit_exception(address pc) { | |
2255 // Exception happened outside inline-cache check code => we are inside | |
2256 // an active nmethod => use cpc to determine a return address | |
1748 | 2257 int exception_offset = pc - code_begin(); |
0 | 2258 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2259 #ifdef ASSERT | |
2260 if (cont_offset == 0) { | |
2261 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2262 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2263 HandleMark hm(thread); | |
2264 ResourceMark rm(thread); | |
2265 CodeBlob* cb = CodeCache::find_blob(pc); | |
2266 assert(cb != NULL && cb == this, ""); | |
2267 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2268 print(); | |
2269 method()->print_codes(); | |
2270 print_code(); | |
2271 print_pcs(); | |
2272 } | |
2273 #endif | |
1250 | 2274 if (cont_offset == 0) { |
2275 // Let the normal error handling report the exception | |
2276 return NULL; | |
2277 } | |
1748 | 2278 return code_begin() + cont_offset; |
0 | 2279 } |
2280 | |
2281 | |
2282 | |
2283 void nmethod_init() { | |
2284 // make sure you didn't forget to adjust the filler fields | |
2285 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2286 } | |
2287 | |
2288 | |
2289 //------------------------------------------------------------------------------------------- | |
2290 | |
2291 | |
2292 // QQQ might we make this work from a frame?? | |
2293 nmethodLocker::nmethodLocker(address pc) { | |
2294 CodeBlob* cb = CodeCache::find_blob(pc); | |
2295 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2296 _nm = (nmethod*)cb; | |
2297 lock_nmethod(_nm); | |
2298 } | |
2299 | |
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2300 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2301 // should pass zombie_ok == true. |
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2302 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2303 if (nm == NULL) return; |
2304 Atomic::inc(&nm->_lock_count); | |
2342
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2305 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2306 } |
2307 | |
2308 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2309 if (nm == NULL) return; | |
2310 Atomic::dec(&nm->_lock_count); | |
2311 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2312 } | |
2313 | |
1204 | 2314 |
2315 // ----------------------------------------------------------------------------- | |
2316 // nmethod::get_deopt_original_pc | |
2317 // | |
2318 // Return the original PC for the given PC if: | |
2319 // (a) the given PC belongs to a nmethod and | |
2320 // (b) it is a deopt PC | |
2321 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2322 if (fr->cb() == NULL) return NULL; | |
2323 | |
2324 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2325 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2326 return nm->get_original_pc(fr); | |
2327 | |
2328 return NULL; | |
0 | 2329 } |
2330 | |
2331 | |
2332 // ----------------------------------------------------------------------------- | |
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2333 // MethodHandle |
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2334 |
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2335 bool nmethod::is_method_handle_return(address return_pc) { |
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2336 if (!has_method_handle_invokes()) return false; |
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2337 PcDesc* pd = pc_desc_at(return_pc); |
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2338 if (pd == NULL) |
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2339 return false; |
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2340 return pd->is_method_handle_invoke(); |
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2341 } |
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2342 |
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2343 |
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2344 // ----------------------------------------------------------------------------- |
0 | 2345 // Verification |
2346 | |
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2347 class VerifyOopsClosure: public OopClosure { |
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2348 nmethod* _nm; |
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2349 bool _ok; |
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2350 public: |
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2351 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2352 bool ok() { return _ok; } |
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2353 virtual void do_oop(oop* p) { |
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2354 if ((*p) == NULL || (*p)->is_oop()) return; |
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2355 if (_ok) { |
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2356 _nm->print_nmethod(true); |
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2357 _ok = false; |
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2358 } |
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2359 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2360 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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2361 } |
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2362 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2363 }; |
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2364 |
0 | 2365 void nmethod::verify() { |
2366 | |
2367 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2368 // seems odd. | |
2369 | |
2370 if( is_zombie() || is_not_entrant() ) | |
2371 return; | |
2372 | |
2373 // Make sure all the entry points are correctly aligned for patching. | |
2374 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2375 | |
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2376 // assert(method()->is_oop(), "must be valid"); |
0 | 2377 |
2378 ResourceMark rm; | |
2379 | |
2380 if (!CodeCache::contains(this)) { | |
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2381 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2382 } |
2383 | |
2384 if(is_native_method() ) | |
2385 return; | |
2386 | |
2387 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2388 if (nm != this) { | |
1490
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|
2389 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
f03d0a26bf83
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changeset
|
2390 this)); |
0 | 2391 } |
2392 | |
2393 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2394 if (! p->verify(this)) { | |
2395 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2396 } | |
2397 } | |
2398 | |
989
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|
2399 VerifyOopsClosure voc(this); |
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|
2400 oops_do(&voc); |
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|
2401 assert(voc.ok(), "embedded oops must be OK"); |
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|
2402 verify_scavenge_root_oops(); |
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|
2403 |
0 | 2404 verify_scopes(); |
2405 } | |
2406 | |
2407 | |
2408 void nmethod::verify_interrupt_point(address call_site) { | |
13071
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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12334
diff
changeset
|
2409 // Verify IC only when nmethod installation is finished. |
13441 | 2410 bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed |
2411 || !this->is_in_use(); // nmethod is installed, but not in 'in_use' state | |
13071
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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diff
changeset
|
2412 if (is_installed) { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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diff
changeset
|
2413 Thread *cur = Thread::current(); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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diff
changeset
|
2414 if (CompiledIC_lock->owner() == cur || |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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changeset
|
2415 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
e2509677809c
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diff
changeset
|
2416 SafepointSynchronize::is_at_safepoint())) { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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diff
changeset
|
2417 CompiledIC_at(this, call_site); |
e2509677809c
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changeset
|
2418 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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diff
changeset
|
2419 } else { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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changeset
|
2420 MutexLocker ml_verify (CompiledIC_lock); |
e2509677809c
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|
2421 CompiledIC_at(this, call_site); |
e2509677809c
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|
2422 } |
0 | 2423 } |
13071
e2509677809c
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|
2424 |
e2509677809c
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|
2425 PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address()); |
0 | 2426 assert(pd != NULL, "PcDesc must exist"); |
2427 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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1250
diff
changeset
|
2428 pd->obj_decode_offset(), pd->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2429 pd->return_oop()); |
0 | 2430 !sd->is_top(); sd = sd->sender()) { |
2431 sd->verify(); | |
2432 } | |
2433 } | |
2434 | |
2435 void nmethod::verify_scopes() { | |
2436 if( !method() ) return; // Runtime stubs have no scope | |
2437 if (method()->is_native()) return; // Ignore stub methods. | |
2438 // iterate through all interrupt point | |
2439 // and verify the debug information is valid. | |
2440 RelocIterator iter((nmethod*)this); | |
2441 while (iter.next()) { | |
2442 address stub = NULL; | |
2443 switch (iter.type()) { | |
2444 case relocInfo::virtual_call_type: | |
2445 verify_interrupt_point(iter.addr()); | |
2446 break; | |
2447 case relocInfo::opt_virtual_call_type: | |
2448 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2449 verify_interrupt_point(iter.addr()); | |
2450 break; | |
2451 case relocInfo::static_call_type: | |
2452 stub = iter.static_call_reloc()->static_stub(); | |
2453 //verify_interrupt_point(iter.addr()); | |
2454 break; | |
2455 case relocInfo::runtime_call_type: | |
2456 address destination = iter.reloc()->value(); | |
2457 // Right now there is no way to find out which entries support | |
2458 // an interrupt point. It would be nice if we had this | |
2459 // information in a table. | |
2460 break; | |
2461 } | |
2462 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2463 } | |
2464 } | |
2465 | |
2466 | |
2467 // ----------------------------------------------------------------------------- | |
2468 // Non-product code | |
2469 #ifndef PRODUCT | |
2470 | |
989
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931
diff
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|
2471 class DebugScavengeRoot: public OopClosure { |
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931
diff
changeset
|
2472 nmethod* _nm; |
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diff
changeset
|
2473 bool _ok; |
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jrose
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931
diff
changeset
|
2474 public: |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2475 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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jrose
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931
diff
changeset
|
2476 bool ok() { return _ok; } |
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jrose
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931
diff
changeset
|
2477 virtual void do_oop(oop* p) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2478 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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jrose
parents:
931
diff
changeset
|
2479 if (_ok) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2480 _nm->print_nmethod(true); |
148e5441d916
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jrose
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931
diff
changeset
|
2481 _ok = false; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2482 } |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
2405
diff
changeset
|
2483 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12175
diff
changeset
|
2484 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2485 (*p)->print(); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2486 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2487 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2488 }; |
0 | 2489 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2490 void nmethod::verify_scavenge_root_oops() { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2491 if (!on_scavenge_root_list()) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2492 // Actually look inside, to verify the claim that it's clean. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2493 DebugScavengeRoot debug_scavenge_root(this); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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931
diff
changeset
|
2494 oops_do(&debug_scavenge_root); |
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6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2495 if (!debug_scavenge_root.ok()) |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
2405
diff
changeset
|
2496 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2497 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2498 assert(scavenge_root_not_marked(), ""); |
0 | 2499 } |
2500 | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
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30
diff
changeset
|
2501 #endif // PRODUCT |
0 | 2502 |
2503 // Printing operations | |
2504 | |
2505 void nmethod::print() const { | |
2506 ResourceMark rm; | |
2507 ttyLocker ttyl; // keep the following output all in one block | |
2508 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2509 tty->print("Compiled method "); |
0 | 2510 |
2511 if (is_compiled_by_c1()) { | |
2512 tty->print("(c1) "); | |
2513 } else if (is_compiled_by_c2()) { | |
2514 tty->print("(c2) "); | |
1692 | 2515 } else if (is_compiled_by_shark()) { |
2516 tty->print("(shark) "); | |
0 | 2517 } else { |
2518 tty->print("(nm) "); | |
2519 } | |
2520 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2521 print_on(tty, NULL); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2522 |
0 | 2523 if (WizardMode) { |
2524 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2525 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2526 tty->print(" { "); | |
2527 if (is_in_use()) tty->print("in_use "); | |
2528 if (is_not_entrant()) tty->print("not_entrant "); | |
2529 if (is_zombie()) tty->print("zombie "); | |
2530 if (is_unloaded()) tty->print("unloaded "); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2531 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2532 tty->print_cr("}:"); |
2533 } | |
2534 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2535 (address)this, | |
2536 (address)this + size(), | |
2537 size()); | |
2538 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2539 relocation_begin(), | |
2540 relocation_end(), | |
2541 relocation_size()); | |
1762
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2542 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2543 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2544 consts_end(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2545 consts_size()); |
1748 | 2546 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2547 insts_begin(), | |
2548 insts_end(), | |
2549 insts_size()); | |
0 | 2550 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2551 stub_begin(), | |
2552 stub_end(), | |
2553 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2554 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2555 oops_begin(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2556 oops_end(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2557 oops_size()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2558 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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6266
diff
changeset
|
2559 metadata_begin(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2560 metadata_end(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2561 metadata_size()); |
0 | 2562 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2563 scopes_data_begin(), | |
2564 scopes_data_end(), | |
2565 scopes_data_size()); | |
2566 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2567 scopes_pcs_begin(), | |
2568 scopes_pcs_end(), | |
2569 scopes_pcs_size()); | |
2570 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2571 dependencies_begin(), | |
2572 dependencies_end(), | |
2573 dependencies_size()); | |
2574 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2575 handler_table_begin(), | |
2576 handler_table_end(), | |
2577 handler_table_size()); | |
2578 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2579 nul_chk_table_begin(), | |
2580 nul_chk_table_end(), | |
2581 nul_chk_table_size()); | |
2582 } | |
2583 | |
100
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diff
changeset
|
2584 void nmethod::print_code() { |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2585 HandleMark hm; |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2586 ResourceMark m; |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2587 Disassembler::decode(this); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2588 } |
c7c777385a15
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diff
changeset
|
2589 |
c7c777385a15
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diff
changeset
|
2590 |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2591 #ifndef PRODUCT |
0 | 2592 |
2593 void nmethod::print_scopes() { | |
2594 // Find the first pc desc for all scopes in the code and print it. | |
2595 ResourceMark rm; | |
2596 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2597 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2598 continue; | |
2599 | |
2600 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2601 sd->print_on(tty, p); | |
2602 } | |
2603 } | |
2604 | |
2605 void nmethod::print_dependencies() { | |
2606 ResourceMark rm; | |
2607 ttyLocker ttyl; // keep the following output all in one block | |
2608 tty->print_cr("Dependencies:"); | |
2609 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2610 deps.print_dependency(); | |
6725
da91efe96a93
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coleenp
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6266
diff
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|
2611 Klass* ctxk = deps.context_type(); |
0 | 2612 if (ctxk != NULL) { |
6983 | 2613 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { |
2614 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
0 | 2615 } |
2616 } | |
2617 deps.log_dependency(); // put it into the xml log also | |
2618 } | |
2619 } | |
2620 | |
2621 | |
2622 void nmethod::print_relocations() { | |
2623 ResourceMark m; // in case methods get printed via the debugger | |
2624 tty->print_cr("relocations:"); | |
2625 RelocIterator iter(this); | |
2626 iter.print(); | |
2627 if (UseRelocIndex) { | |
2628 jint* index_end = (jint*)relocation_end() - 1; | |
2629 jint index_size = *index_end; | |
2630 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2631 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2632 if (index_size > 0) { | |
2633 jint* ip; | |
2634 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2635 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2636 ip[0], | |
2637 ip[1], | |
2638 header_end()+ip[0], | |
2639 relocation_begin()-1+ip[1]); | |
2640 for (; ip < index_end; ip++) | |
2641 tty->print_cr(" (%d ?)", ip[0]); | |
10973
ef57c43512d6
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
ccheung
parents:
10390
diff
changeset
|
2642 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip); |
ef57c43512d6
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
ccheung
parents:
10390
diff
changeset
|
2643 ip++; |
0 | 2644 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
2645 } | |
2646 } | |
2647 } | |
2648 | |
2649 | |
2650 void nmethod::print_pcs() { | |
2651 ResourceMark m; // in case methods get printed via debugger | |
2652 tty->print_cr("pc-bytecode offsets:"); | |
2653 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2654 p->print(this); | |
2655 } | |
2656 } | |
2657 | |
100
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6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2658 #endif // PRODUCT |
0 | 2659 |
2660 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2661 RelocIterator iter(this, begin, end); | |
2662 bool have_one = false; | |
2663 while (iter.next()) { | |
2664 have_one = true; | |
2665 switch (iter.type()) { | |
2666 case relocInfo::none: return "no_reloc"; | |
2667 case relocInfo::oop_type: { | |
2668 stringStream st; | |
2669 oop_Relocation* r = iter.oop_reloc(); | |
2670 oop obj = r->oop_value(); | |
2671 st.print("oop("); | |
2672 if (obj == NULL) st.print("NULL"); | |
2673 else obj->print_value_on(&st); | |
2674 st.print(")"); | |
2675 return st.as_string(); | |
2676 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2677 case relocInfo::metadata_type: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2678 stringStream st; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2679 metadata_Relocation* r = iter.metadata_reloc(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2680 Metadata* obj = r->metadata_value(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2681 st.print("metadata("); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2682 if (obj == NULL) st.print("NULL"); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2683 else obj->print_value_on(&st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2684 st.print(")"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2685 return st.as_string(); |
da91efe96a93
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diff
changeset
|
2686 } |
0 | 2687 case relocInfo::virtual_call_type: return "virtual_call"; |
2688 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2689 case relocInfo::static_call_type: return "static_call"; | |
2690 case relocInfo::static_stub_type: return "static_stub"; | |
2691 case relocInfo::runtime_call_type: return "runtime_call"; | |
2692 case relocInfo::external_word_type: return "external_word"; | |
2693 case relocInfo::internal_word_type: return "internal_word"; | |
2694 case relocInfo::section_word_type: return "section_word"; | |
2695 case relocInfo::poll_type: return "poll"; | |
2696 case relocInfo::poll_return_type: return "poll_return"; | |
2697 case relocInfo::type_mask: return "type_bit_mask"; | |
2698 } | |
2699 } | |
2700 return have_one ? "other" : NULL; | |
2701 } | |
2702 | |
2703 // Return a the last scope in (begin..end] | |
2704 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2705 PcDesc* p = pc_desc_near(begin+1); | |
2706 if (p != NULL && p->real_pc(this) <= end) { | |
2707 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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1250
diff
changeset
|
2708 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
|
2709 p->return_oop()); |
0 | 2710 } |
2711 return NULL; | |
2712 } | |
2713 | |
6796
b31471cdc53e
7200163: add CodeComments functionality to assember stubs
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parents:
6792
diff
changeset
|
2714 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2715 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2716 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2717 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2718 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2719 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
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parents:
1644
diff
changeset
|
2720 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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parents:
1644
diff
changeset
|
2721 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2722 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
|
2723 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2724 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
|
2725 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2726 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2727 methodHandle m = method(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2728 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2729 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2730 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2731 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2732 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2733 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2734 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2735 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2736 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
|
2737 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2738 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2739 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2740 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2741 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2742 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
|
2743 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2744 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2745 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2746 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2747 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2748 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
|
2749 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2750 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2751 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2752 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2753 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2754 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
|
2755 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
|
2756 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2757 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2758 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
|
2759 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2760 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
|
2761 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2762 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2763 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
|
2764 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
|
2765 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2766 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2767 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2768 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2769 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2770 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2771 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2772 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2773 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2774 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2775 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2776 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2777 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2778 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
|
2779 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
|
2780 stream->print("[%s+0x%x]", spname, offset); |
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 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
|
2783 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2784 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2785 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2786 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2787 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2788 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2789 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2790 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2791 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2792 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
|
2793 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2794 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2795 did_name = 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 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2798 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2799 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2800 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2801 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2802 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2803 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2804 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2805 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2806 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2807 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2808 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2809 } |
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2810 if (!did_old_sp) { |
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2811 stream->print(" # "); |
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2812 stream->move_to(tab1); |
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2813 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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2814 stream->print(" (%s of caller)", spname); |
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2815 stream->cr(); |
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2816 } |
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2817 } |
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2818 } |
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2819 } |
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2820 |
0 | 2821 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2822 // First, find an oopmap in (begin, end]. | |
2823 // We use the odd half-closed interval so that oop maps and scope descs | |
2824 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2825 address base = code_begin(); |
0 | 2826 OopMapSet* oms = oop_maps(); |
2827 if (oms != NULL) { | |
2828 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2829 OopMap* om = oms->at(i); | |
2830 address pc = base + om->offset(); | |
2831 if (pc > begin) { | |
2832 if (pc <= end) { | |
100
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2833 st->move_to(column); |
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2834 st->print("; "); |
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2835 om->print_on(st); |
0 | 2836 } |
2837 break; | |
2838 } | |
2839 } | |
2840 } | |
100
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2841 |
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2842 // Print any debug info present at this pc. |
0 | 2843 ScopeDesc* sd = scope_desc_in(begin, end); |
2844 if (sd != NULL) { | |
100
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2845 st->move_to(column); |
0 | 2846 if (sd->bci() == SynchronizationEntryBCI) { |
2847 st->print(";*synchronization entry"); | |
2848 } else { | |
6725
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2849 if (sd->method() == NULL) { |
100
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2850 st->print("method is NULL"); |
0 | 2851 } else if (sd->method()->is_native()) { |
100
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2852 st->print("method is native"); |
0 | 2853 } else { |
2142 | 2854 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2855 st->print(";*%s", Bytecodes::name(bc)); |
2856 switch (bc) { | |
2857 case Bytecodes::_invokevirtual: | |
2858 case Bytecodes::_invokespecial: | |
2859 case Bytecodes::_invokestatic: | |
2860 case Bytecodes::_invokeinterface: | |
2861 { | |
2142 | 2862 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2863 st->print(" "); |
2142 | 2864 if (invoke.name() != NULL) |
2865 invoke.name()->print_symbol_on(st); | |
0 | 2866 else |
2867 st->print("<UNKNOWN>"); | |
2868 break; | |
2869 } | |
2870 case Bytecodes::_getfield: | |
2871 case Bytecodes::_putfield: | |
2872 case Bytecodes::_getstatic: | |
2873 case Bytecodes::_putstatic: | |
2874 { | |
2142 | 2875 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2876 st->print(" "); |
2142 | 2877 if (field.name() != NULL) |
2878 field.name()->print_symbol_on(st); | |
0 | 2879 else |
2880 st->print("<UNKNOWN>"); | |
2881 } | |
2882 } | |
2883 } | |
2884 } | |
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2885 |
0 | 2886 // Print all scopes |
2887 for (;sd != NULL; sd = sd->sender()) { | |
100
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2888 st->move_to(column); |
0 | 2889 st->print("; -"); |
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2890 if (sd->method() == NULL) { |
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2891 st->print("method is NULL"); |
0 | 2892 } else { |
2893 sd->method()->print_short_name(st); | |
2894 } | |
2895 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2896 if (lineno != -1) { | |
2897 st->print("@%d (line %d)", sd->bci(), lineno); | |
2898 } else { | |
2899 st->print("@%d", sd->bci()); | |
2900 } | |
2901 st->cr(); | |
2902 } | |
2903 } | |
2904 | |
2905 // Print relocation information | |
2906 const char* str = reloc_string_for(begin, end); | |
2907 if (str != NULL) { | |
2908 if (sd != NULL) st->cr(); | |
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2909 st->move_to(column); |
0 | 2910 st->print("; {%s}", str); |
2911 } | |
1748 | 2912 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2913 if (cont_offset != 0) { |
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2914 st->move_to(column); |
1748 | 2915 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2916 } |
2917 | |
2918 } | |
2919 | |
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2920 #ifndef PRODUCT |
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2921 |
0 | 2922 void nmethod::print_value_on(outputStream* st) const { |
2405
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|
2923 st->print("nmethod"); |
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|
2924 print_on(st, NULL); |
0 | 2925 } |
2926 | |
2927 void nmethod::print_calls(outputStream* st) { | |
2928 RelocIterator iter(this); | |
2929 while (iter.next()) { | |
2930 switch (iter.type()) { | |
2931 case relocInfo::virtual_call_type: | |
2932 case relocInfo::opt_virtual_call_type: { | |
2933 VerifyMutexLocker mc(CompiledIC_lock); | |
2934 CompiledIC_at(iter.reloc())->print(); | |
2935 break; | |
2936 } | |
2937 case relocInfo::static_call_type: | |
2938 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2939 compiledStaticCall_at(iter.reloc())->print(); | |
2940 break; | |
2941 } | |
2942 } | |
2943 } | |
2944 | |
2945 void nmethod::print_handler_table() { | |
2946 ExceptionHandlerTable(this).print(); | |
2947 } | |
2948 | |
2949 void nmethod::print_nul_chk_table() { | |
1748 | 2950 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2951 } |
2952 | |
2953 void nmethod::print_statistics() { | |
2954 ttyLocker ttyl; | |
2955 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2956 nmethod_stats.print_native_nmethod_stats(); | |
2957 nmethod_stats.print_nmethod_stats(); | |
2958 DebugInformationRecorder::print_statistics(); | |
2959 nmethod_stats.print_pc_stats(); | |
2960 Dependencies::print_statistics(); | |
2961 if (xtty != NULL) xtty->tail("statistics"); | |
2962 } | |
2963 | |
2964 #endif // PRODUCT |