Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 17790:5da8bb64b370
Merge
author | kvn |
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date | Mon, 23 Dec 2013 10:26:08 -0800 |
parents | 4cdf4f71177d df832bd8edb9 |
children | 62c54fcc0a35 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
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28 #include "code/dependencies.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
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32 #include "compiler/compileBroker.hpp" |
1972 | 33 #include "compiler/compileLog.hpp" |
34 #include "compiler/compilerOracle.hpp" | |
35 #include "compiler/disassembler.hpp" | |
36 #include "interpreter/bytecode.hpp" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
1972 | 40 #include "runtime/sharedRuntime.hpp" |
41 #include "runtime/sweeper.hpp" | |
42 #include "utilities/dtrace.hpp" | |
43 #include "utilities/events.hpp" | |
44 #include "utilities/xmlstream.hpp" | |
45 #ifdef SHARK | |
46 #include "shark/sharkCompiler.hpp" | |
47 #endif | |
0 | 48 |
49 #ifdef DTRACE_ENABLED | |
50 | |
51 // Only bother with this argument setup if dtrace is available | |
52 | |
4006 | 53 #ifndef USDT2 |
0 | 54 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
55 const char*, int, const char*, int, const char*, int, void*, size_t); | |
56 | |
57 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
58 char*, int, char*, int, char*, int); | |
59 | |
60 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
61 { \ | |
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62 Method* m = (method); \ |
0 | 63 if (m != NULL) { \ |
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64 Symbol* klass_name = m->klass_name(); \ |
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65 Symbol* name = m->name(); \ |
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66 Symbol* signature = m->signature(); \ |
0 | 67 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
68 klass_name->bytes(), klass_name->utf8_length(), \ | |
69 name->bytes(), name->utf8_length(), \ | |
70 signature->bytes(), signature->utf8_length()); \ | |
71 } \ | |
72 } | |
4006 | 73 #else /* USDT2 */ |
74 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
75 { \ | |
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76 Method* m = (method); \ |
4006 | 77 if (m != NULL) { \ |
78 Symbol* klass_name = m->klass_name(); \ | |
79 Symbol* name = m->name(); \ | |
80 Symbol* signature = m->signature(); \ | |
81 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
82 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
83 (char *) name->bytes(), name->utf8_length(), \ | |
84 (char *) signature->bytes(), signature->utf8_length()); \ | |
85 } \ | |
86 } | |
87 #endif /* USDT2 */ | |
0 | 88 |
89 #else // ndef DTRACE_ENABLED | |
90 | |
91 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
92 | |
93 #endif | |
94 | |
95 bool nmethod::is_compiled_by_c1() const { | |
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96 if (compiler() == NULL) { |
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97 return false; |
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98 } |
0 | 99 return compiler()->is_c1(); |
100 } | |
101 bool nmethod::is_compiled_by_c2() const { | |
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102 if (compiler() == NULL) { |
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103 return false; |
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104 } |
0 | 105 return compiler()->is_c2(); |
106 } | |
1692 | 107 bool nmethod::is_compiled_by_shark() const { |
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108 if (compiler() == NULL) { |
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109 return false; |
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110 } |
1692 | 111 return compiler()->is_shark(); |
112 } | |
0 | 113 |
114 | |
115 | |
116 //--------------------------------------------------------------------------------- | |
117 // NMethod statistics | |
118 // They are printed under various flags, including: | |
119 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
120 // (In the latter two cases, they like other stats are printed to the log only.) | |
121 | |
122 #ifndef PRODUCT | |
123 // These variables are put into one block to reduce relocations | |
124 // and make it simpler to print from the debugger. | |
125 static | |
126 struct nmethod_stats_struct { | |
127 int nmethod_count; | |
128 int total_size; | |
129 int relocation_size; | |
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130 int consts_size; |
1748 | 131 int insts_size; |
0 | 132 int stub_size; |
133 int scopes_data_size; | |
134 int scopes_pcs_size; | |
135 int dependencies_size; | |
136 int handler_table_size; | |
137 int nul_chk_table_size; | |
138 int oops_size; | |
139 | |
140 void note_nmethod(nmethod* nm) { | |
141 nmethod_count += 1; | |
142 total_size += nm->size(); | |
143 relocation_size += nm->relocation_size(); | |
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144 consts_size += nm->consts_size(); |
1748 | 145 insts_size += nm->insts_size(); |
0 | 146 stub_size += nm->stub_size(); |
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147 oops_size += nm->oops_size(); |
0 | 148 scopes_data_size += nm->scopes_data_size(); |
149 scopes_pcs_size += nm->scopes_pcs_size(); | |
150 dependencies_size += nm->dependencies_size(); | |
151 handler_table_size += nm->handler_table_size(); | |
152 nul_chk_table_size += nm->nul_chk_table_size(); | |
153 } | |
154 void print_nmethod_stats() { | |
155 if (nmethod_count == 0) return; | |
156 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
157 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
158 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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159 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 160 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 161 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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162 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 163 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
164 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
165 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
166 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
167 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
168 } | |
169 | |
170 int native_nmethod_count; | |
171 int native_total_size; | |
172 int native_relocation_size; | |
1748 | 173 int native_insts_size; |
0 | 174 int native_oops_size; |
175 void note_native_nmethod(nmethod* nm) { | |
176 native_nmethod_count += 1; | |
177 native_total_size += nm->size(); | |
178 native_relocation_size += nm->relocation_size(); | |
1748 | 179 native_insts_size += nm->insts_size(); |
0 | 180 native_oops_size += nm->oops_size(); |
181 } | |
182 void print_native_nmethod_stats() { | |
183 if (native_nmethod_count == 0) return; | |
184 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
185 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
186 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 187 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 188 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
189 } | |
190 | |
191 int pc_desc_resets; // number of resets (= number of caches) | |
192 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
193 int pc_desc_approx; // number of those which have approximate true | |
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194 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 195 int pc_desc_hits; // number of LRU cache hits |
196 int pc_desc_tests; // total number of PcDesc examinations | |
197 int pc_desc_searches; // total number of quasi-binary search steps | |
198 int pc_desc_adds; // number of LUR cache insertions | |
199 | |
200 void print_pc_stats() { | |
201 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
202 pc_desc_queries, | |
203 (double)(pc_desc_tests + pc_desc_searches) | |
204 / pc_desc_queries); | |
205 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
206 pc_desc_resets, | |
207 pc_desc_queries, pc_desc_approx, | |
208 pc_desc_repeats, pc_desc_hits, | |
209 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
210 } | |
211 } nmethod_stats; | |
212 #endif //PRODUCT | |
213 | |
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214 |
0 | 215 //--------------------------------------------------------------------------------- |
216 | |
217 | |
218 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
219 assert(pc != NULL, "Must be non null"); | |
220 assert(exception.not_null(), "Must be non null"); | |
221 assert(handler != NULL, "Must be non null"); | |
222 | |
223 _count = 0; | |
224 _exception_type = exception->klass(); | |
225 _next = NULL; | |
226 | |
227 add_address_and_handler(pc,handler); | |
228 } | |
229 | |
230 | |
231 address ExceptionCache::match(Handle exception, address pc) { | |
232 assert(pc != NULL,"Must be non null"); | |
233 assert(exception.not_null(),"Must be non null"); | |
234 if (exception->klass() == exception_type()) { | |
235 return (test_address(pc)); | |
236 } | |
237 | |
238 return NULL; | |
239 } | |
240 | |
241 | |
242 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
243 assert(exception.not_null(),"Must be non null"); | |
244 if (exception->klass() == exception_type() && count() < cache_size) { | |
245 return true; | |
246 } | |
247 return false; | |
248 } | |
249 | |
250 | |
251 address ExceptionCache::test_address(address addr) { | |
252 for (int i=0; i<count(); i++) { | |
253 if (pc_at(i) == addr) { | |
254 return handler_at(i); | |
255 } | |
256 } | |
257 return NULL; | |
258 } | |
259 | |
260 | |
261 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
262 if (test_address(addr) == handler) return true; | |
263 if (count() < cache_size) { | |
264 set_pc_at(count(),addr); | |
265 set_handler_at(count(), handler); | |
266 increment_count(); | |
267 return true; | |
268 } | |
269 return false; | |
270 } | |
271 | |
272 | |
273 // private method for handling exception cache | |
274 // These methods are private, and used to manipulate the exception cache | |
275 // directly. | |
276 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
277 ExceptionCache* ec = exception_cache(); | |
278 while (ec != NULL) { | |
279 if (ec->match_exception_with_space(exception)) { | |
280 return ec; | |
281 } | |
282 ec = ec->next(); | |
283 } | |
284 return NULL; | |
285 } | |
286 | |
287 | |
288 //----------------------------------------------------------------------------- | |
289 | |
290 | |
291 // Helper used by both find_pc_desc methods. | |
292 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
293 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
294 if (!approximate) | |
295 return pc->pc_offset() == pc_offset; | |
296 else | |
297 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
298 } | |
299 | |
300 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
301 if (initial_pc_desc == NULL) { | |
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302 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 303 return; |
304 } | |
305 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
306 // reset the cache by filling it with benign (non-null) values | |
307 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
308 for (int i = 0; i < cache_size; i++) | |
309 _pc_descs[i] = initial_pc_desc; | |
310 } | |
311 | |
312 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
313 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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314 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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315 |
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316 // Note: one might think that caching the most recently |
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317 // read value separately would be a win, but one would be |
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318 // wrong. When many threads are updating it, the cache |
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319 // line it's in would bounce between caches, negating |
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320 // any benefit. |
0 | 321 |
322 // In order to prevent race conditions do not load cache elements | |
323 // repeatedly, but use a local copy: | |
324 PcDesc* res; | |
325 | |
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326 // Step one: Check the most recently added value. |
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327 res = _pc_descs[0]; |
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328 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 329 if (match_desc(res, pc_offset, approximate)) { |
330 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
331 return res; | |
332 } | |
333 | |
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334 // Step two: Check the rest of the LRU cache. |
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335 for (int i = 1; i < cache_size; ++i) { |
0 | 336 res = _pc_descs[i]; |
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337 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 338 if (match_desc(res, pc_offset, approximate)) { |
339 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
340 return res; | |
341 } | |
342 } | |
343 | |
344 // Report failure. | |
345 return NULL; | |
346 } | |
347 | |
348 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
349 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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350 // Update the LRU cache by shifting pc_desc forward. |
0 | 351 for (int i = 0; i < cache_size; i++) { |
352 PcDesc* next = _pc_descs[i]; | |
353 _pc_descs[i] = pc_desc; | |
354 pc_desc = next; | |
355 } | |
356 } | |
357 | |
358 // adjust pcs_size so that it is a multiple of both oopSize and | |
359 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
360 // of oopSize, then 2*sizeof(PcDesc) is) | |
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361 static int adjust_pcs_size(int pcs_size) { |
0 | 362 int nsize = round_to(pcs_size, oopSize); |
363 if ((nsize % sizeof(PcDesc)) != 0) { | |
364 nsize = pcs_size + sizeof(PcDesc); | |
365 } | |
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366 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 367 return nsize; |
368 } | |
369 | |
370 //----------------------------------------------------------------------------- | |
371 | |
372 | |
373 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
374 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
375 assert(new_entry != NULL,"Must be non null"); | |
376 assert(new_entry->next() == NULL, "Must be null"); | |
377 | |
378 if (exception_cache() != NULL) { | |
379 new_entry->set_next(exception_cache()); | |
380 } | |
381 set_exception_cache(new_entry); | |
382 } | |
383 | |
384 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
385 ExceptionCache* prev = NULL; | |
386 ExceptionCache* curr = exception_cache(); | |
387 assert(curr != NULL, "nothing to remove"); | |
388 // find the previous and next entry of ec | |
389 while (curr != ec) { | |
390 prev = curr; | |
391 curr = curr->next(); | |
392 assert(curr != NULL, "ExceptionCache not found"); | |
393 } | |
394 // now: curr == ec | |
395 ExceptionCache* next = curr->next(); | |
396 if (prev == NULL) { | |
397 set_exception_cache(next); | |
398 } else { | |
399 prev->set_next(next); | |
400 } | |
401 delete curr; | |
402 } | |
403 | |
404 | |
405 // public method for accessing the exception cache | |
406 // These are the public access methods. | |
407 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
408 // We never grab a lock to read the exception cache, so we may | |
409 // have false negatives. This is okay, as it can only happen during | |
410 // the first few exception lookups for a given nmethod. | |
411 ExceptionCache* ec = exception_cache(); | |
412 while (ec != NULL) { | |
413 address ret_val; | |
414 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
415 return ret_val; | |
416 } | |
417 ec = ec->next(); | |
418 } | |
419 return NULL; | |
420 } | |
421 | |
422 | |
423 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
424 // There are potential race conditions during exception cache updates, so we | |
425 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 426 // we don't lock during reads, it is possible to have several threads attempt |
0 | 427 // to update the cache with the same data. We need to check for already inserted |
428 // copies of the current data before adding it. | |
429 | |
430 MutexLocker ml(ExceptionCache_lock); | |
431 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
432 | |
433 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
434 target_entry = new ExceptionCache(exception,pc,handler); | |
435 add_exception_cache_entry(target_entry); | |
436 } | |
437 } | |
438 | |
439 | |
440 //-------------end of code for ExceptionCache-------------- | |
441 | |
442 | |
443 int nmethod::total_size() const { | |
444 return | |
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445 consts_size() + |
1748 | 446 insts_size() + |
0 | 447 stub_size() + |
448 scopes_data_size() + | |
449 scopes_pcs_size() + | |
450 handler_table_size() + | |
451 nul_chk_table_size(); | |
452 } | |
453 | |
454 const char* nmethod::compile_kind() const { | |
455 if (is_osr_method()) return "osr"; | |
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456 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 457 return NULL; |
458 } | |
459 | |
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460 // Fill in default values for various flag fields |
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461 void nmethod::init_defaults() { |
13441 | 462 _state = in_use; |
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463 _marked_for_reclamation = 0; |
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464 _has_flushed_dependencies = 0; |
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465 _has_unsafe_access = 0; |
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466 _has_method_handle_invokes = 0; |
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467 _lazy_critical_native = 0; |
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468 _has_wide_vectors = 0; |
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469 _marked_for_deoptimization = 0; |
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470 _lock_count = 0; |
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471 _stack_traversal_mark = 0; |
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472 _unload_reported = false; // jvmti state |
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473 |
1726 | 474 #ifdef ASSERT |
475 _oops_are_stale = false; | |
476 #endif | |
477 | |
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478 _oops_do_mark_link = NULL; |
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479 _jmethod_id = NULL; |
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480 _osr_link = NULL; |
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481 _scavenge_root_link = NULL; |
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482 _scavenge_root_state = 0; |
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483 _compiler = NULL; |
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484 |
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485 #ifdef HAVE_DTRACE_H |
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486 _trap_offset = 0; |
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487 #endif // def HAVE_DTRACE_H |
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488 } |
0 | 489 |
490 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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491 int compile_id, |
0 | 492 CodeBuffer *code_buffer, |
493 int vep_offset, | |
494 int frame_complete, | |
495 int frame_size, | |
496 ByteSize basic_lock_owner_sp_offset, | |
497 ByteSize basic_lock_sp_offset, | |
498 OopMapSet* oop_maps) { | |
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499 code_buffer->finalize_oop_references(method); |
0 | 500 // create nmethod |
501 nmethod* nm = NULL; | |
502 { | |
503 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
504 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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505 CodeOffsets offsets; |
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506 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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507 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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508 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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509 compile_id, &offsets, |
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510 code_buffer, frame_size, |
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511 basic_lock_owner_sp_offset, |
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512 basic_lock_sp_offset, oop_maps); |
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513 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
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514 if (PrintAssembly && nm != NULL) { |
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515 Disassembler::decode(nm); |
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516 } |
0 | 517 } |
518 // verify nmethod | |
519 debug_only(if (nm) nm->verify();) // might block | |
520 | |
521 if (nm != NULL) { | |
522 nm->log_new_nmethod(); | |
523 } | |
524 | |
525 return nm; | |
526 } | |
527 | |
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528 #ifdef HAVE_DTRACE_H |
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529 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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530 CodeBuffer *code_buffer, |
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531 int vep_offset, |
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532 int trap_offset, |
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533 int frame_complete, |
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534 int frame_size) { |
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535 code_buffer->finalize_oop_references(method); |
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536 // create nmethod |
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537 nmethod* nm = NULL; |
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538 { |
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539 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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540 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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541 CodeOffsets offsets; |
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542 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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543 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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544 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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545 |
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546 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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547 &offsets, code_buffer, frame_size); |
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548 |
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549 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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550 if (PrintAssembly && nm != NULL) { |
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551 Disassembler::decode(nm); |
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552 } |
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553 } |
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554 // verify nmethod |
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555 debug_only(if (nm) nm->verify();) // might block |
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556 |
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557 if (nm != NULL) { |
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558 nm->log_new_nmethod(); |
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559 } |
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560 |
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561 return nm; |
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562 } |
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563 |
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564 #endif // def HAVE_DTRACE_H |
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565 |
0 | 566 nmethod* nmethod::new_nmethod(methodHandle method, |
567 int compile_id, | |
568 int entry_bci, | |
569 CodeOffsets* offsets, | |
570 int orig_pc_offset, | |
571 DebugInformationRecorder* debug_info, | |
572 Dependencies* dependencies, | |
573 CodeBuffer* code_buffer, int frame_size, | |
574 OopMapSet* oop_maps, | |
575 ExceptionHandlerTable* handler_table, | |
576 ImplicitExceptionTable* nul_chk_table, | |
577 AbstractCompiler* compiler, | |
578 int comp_level | |
579 ) | |
580 { | |
581 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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582 code_buffer->finalize_oop_references(method); |
0 | 583 // create nmethod |
584 nmethod* nm = NULL; | |
585 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
586 int nmethod_size = | |
587 allocation_size(code_buffer, sizeof(nmethod)) | |
588 + adjust_pcs_size(debug_info->pcs_size()) | |
589 + round_to(dependencies->size_in_bytes() , oopSize) | |
590 + round_to(handler_table->size_in_bytes(), oopSize) | |
591 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
592 + round_to(debug_info->data_size() , oopSize); | |
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593 |
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594 nm = new (nmethod_size) |
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595 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
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596 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
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597 oop_maps, |
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598 handler_table, |
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599 nul_chk_table, |
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600 compiler, |
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601 comp_level); |
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602 |
0 | 603 if (nm != NULL) { |
604 // To make dependency checking during class loading fast, record | |
605 // the nmethod dependencies in the classes it is dependent on. | |
606 // This allows the dependency checking code to simply walk the | |
607 // class hierarchy above the loaded class, checking only nmethods | |
608 // which are dependent on those classes. The slow way is to | |
609 // check every nmethod for dependencies which makes it linear in | |
610 // the number of methods compiled. For applications with a lot | |
611 // classes the slow way is too slow. | |
612 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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613 Klass* klass = deps.context_type(); |
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614 if (klass == NULL) { |
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615 continue; // ignore things like evol_method |
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616 } |
0 | 617 |
618 // record this nmethod as dependent on this klass | |
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619 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 620 } |
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621 NOT_PRODUCT(nmethod_stats.note_nmethod(nm)); |
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622 if (PrintAssembly || CompilerOracle::has_option_string(method, "PrintAssembly")) { |
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623 Disassembler::decode(nm); |
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624 } |
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625 } |
0 | 626 } |
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627 // Do verification and logging outside CodeCache_lock. |
0 | 628 if (nm != NULL) { |
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629 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet. |
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630 DEBUG_ONLY(nm->verify();) |
0 | 631 nm->log_new_nmethod(); |
632 } | |
633 return nm; | |
634 } | |
635 | |
636 | |
637 // For native wrappers | |
638 nmethod::nmethod( | |
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639 Method* method, |
0 | 640 int nmethod_size, |
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641 int compile_id, |
0 | 642 CodeOffsets* offsets, |
643 CodeBuffer* code_buffer, | |
644 int frame_size, | |
645 ByteSize basic_lock_owner_sp_offset, | |
646 ByteSize basic_lock_sp_offset, | |
647 OopMapSet* oop_maps ) | |
648 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
649 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 650 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
651 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 652 { |
653 { | |
654 debug_only(No_Safepoint_Verifier nsv;) | |
655 assert_locked_or_safepoint(CodeCache_lock); | |
656 | |
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657 init_defaults(); |
0 | 658 _method = method; |
659 _entry_bci = InvocationEntryBci; | |
660 // We have no exception handler or deopt handler make the | |
661 // values something that will never match a pc like the nmethod vtable entry | |
662 _exception_offset = 0; | |
663 _deoptimize_offset = 0; | |
1204 | 664 _deoptimize_mh_offset = 0; |
0 | 665 _orig_pc_offset = 0; |
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666 |
1748 | 667 _consts_offset = data_offset(); |
0 | 668 _stub_offset = data_offset(); |
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669 _oops_offset = data_offset(); |
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670 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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671 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 672 _scopes_pcs_offset = _scopes_data_offset; |
673 _dependencies_offset = _scopes_pcs_offset; | |
674 _handler_table_offset = _dependencies_offset; | |
675 _nul_chk_table_offset = _handler_table_offset; | |
676 _nmethod_end_offset = _nul_chk_table_offset; | |
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677 _compile_id = compile_id; |
0 | 678 _comp_level = CompLevel_none; |
1748 | 679 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
680 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 681 _osr_entry_point = NULL; |
682 _exception_cache = NULL; | |
683 _pc_desc_cache.reset_to(NULL); | |
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684 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
0 | 685 |
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686 code_buffer->copy_values_to(this); |
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687 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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688 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 689 Universe::heap()->register_nmethod(this); |
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690 } |
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691 debug_only(verify_scavenge_root_oops()); |
0 | 692 CodeCache::commit(this); |
693 } | |
694 | |
695 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
696 ttyLocker ttyl; // keep the following output all in one block | |
697 // This output goes directly to the tty, not the compiler log. | |
698 // To enable tools to match it up with the compilation activity, | |
699 // be sure to tag this tty output with the compile ID. | |
700 if (xtty != NULL) { | |
701 xtty->begin_head("print_native_nmethod"); | |
702 xtty->method(_method); | |
703 xtty->stamp(); | |
704 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
705 } | |
706 // print the header part first | |
707 print(); | |
708 // then print the requested information | |
709 if (PrintNativeNMethods) { | |
710 print_code(); | |
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711 if (oop_maps != NULL) { |
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712 oop_maps->print(); |
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713 } |
0 | 714 } |
715 if (PrintRelocations) { | |
716 print_relocations(); | |
717 } | |
718 if (xtty != NULL) { | |
719 xtty->tail("print_native_nmethod"); | |
720 } | |
721 } | |
722 } | |
723 | |
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724 // For dtrace wrappers |
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725 #ifdef HAVE_DTRACE_H |
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726 nmethod::nmethod( |
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727 Method* method, |
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728 int nmethod_size, |
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729 CodeOffsets* offsets, |
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730 CodeBuffer* code_buffer, |
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731 int frame_size) |
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732 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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733 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 734 _native_receiver_sp_offset(in_ByteSize(-1)), |
735 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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736 { |
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737 { |
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738 debug_only(No_Safepoint_Verifier nsv;) |
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739 assert_locked_or_safepoint(CodeCache_lock); |
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740 |
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741 init_defaults(); |
116
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742 _method = method; |
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743 _entry_bci = InvocationEntryBci; |
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744 // We have no exception handler or deopt handler make the |
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745 // values something that will never match a pc like the nmethod vtable entry |
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746 _exception_offset = 0; |
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747 _deoptimize_offset = 0; |
1204 | 748 _deoptimize_mh_offset = 0; |
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749 _unwind_handler_offset = -1; |
116
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750 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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751 _orig_pc_offset = 0; |
1748 | 752 _consts_offset = data_offset(); |
116
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753 _stub_offset = data_offset(); |
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754 _oops_offset = data_offset(); |
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755 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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756 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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757 _scopes_pcs_offset = _scopes_data_offset; |
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758 _dependencies_offset = _scopes_pcs_offset; |
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759 _handler_table_offset = _dependencies_offset; |
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760 _nul_chk_table_offset = _handler_table_offset; |
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761 _nmethod_end_offset = _nul_chk_table_offset; |
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762 _compile_id = 0; // default |
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763 _comp_level = CompLevel_none; |
1748 | 764 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
765 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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766 _osr_entry_point = NULL; |
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767 _exception_cache = NULL; |
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768 _pc_desc_cache.reset_to(NULL); |
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769 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
116
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770 |
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771 code_buffer->copy_values_to(this); |
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772 debug_only(verify_scavenge_root_oops()); |
116
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773 CodeCache::commit(this); |
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774 } |
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775 |
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776 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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777 ttyLocker ttyl; // keep the following output all in one block |
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778 // This output goes directly to the tty, not the compiler log. |
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779 // To enable tools to match it up with the compilation activity, |
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780 // be sure to tag this tty output with the compile ID. |
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781 if (xtty != NULL) { |
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782 xtty->begin_head("print_dtrace_nmethod"); |
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783 xtty->method(_method); |
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784 xtty->stamp(); |
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785 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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786 } |
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787 // print the header part first |
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788 print(); |
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789 // then print the requested information |
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790 if (PrintNMethods) { |
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791 print_code(); |
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792 } |
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793 if (PrintRelocations) { |
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794 print_relocations(); |
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795 } |
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796 if (xtty != NULL) { |
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797 xtty->tail("print_dtrace_nmethod"); |
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798 } |
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799 } |
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800 } |
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801 #endif // def HAVE_DTRACE_H |
0 | 802 |
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803 void* nmethod::operator new(size_t size, int nmethod_size) throw() { |
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804 // Not critical, may return null if there is too little continuous memory |
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805 return CodeCache::allocate(nmethod_size); |
0 | 806 } |
807 | |
808 nmethod::nmethod( | |
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809 Method* method, |
0 | 810 int nmethod_size, |
811 int compile_id, | |
812 int entry_bci, | |
813 CodeOffsets* offsets, | |
814 int orig_pc_offset, | |
815 DebugInformationRecorder* debug_info, | |
816 Dependencies* dependencies, | |
817 CodeBuffer *code_buffer, | |
818 int frame_size, | |
819 OopMapSet* oop_maps, | |
820 ExceptionHandlerTable* handler_table, | |
821 ImplicitExceptionTable* nul_chk_table, | |
822 AbstractCompiler* compiler, | |
823 int comp_level | |
824 ) | |
825 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
826 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 827 _native_receiver_sp_offset(in_ByteSize(-1)), |
828 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 829 { |
830 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
831 { | |
832 debug_only(No_Safepoint_Verifier nsv;) | |
833 assert_locked_or_safepoint(CodeCache_lock); | |
834 | |
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835 init_defaults(); |
0 | 836 _method = method; |
1644
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837 _entry_bci = entry_bci; |
0 | 838 _compile_id = compile_id; |
839 _comp_level = comp_level; | |
840 _compiler = compiler; | |
841 _orig_pc_offset = orig_pc_offset; | |
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842 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
1748 | 843 |
844 // Section offsets | |
1762
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845 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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846 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 847 |
848 // Exception handler and deopt handler are in the stub section | |
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849 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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850 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 851 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
852 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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853 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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854 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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855 } else { |
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856 _deoptimize_mh_offset = -1; |
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857 } |
1378
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858 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 859 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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860 } else { |
1748 | 861 _unwind_handler_offset = -1; |
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862 } |
1748 | 863 |
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864 _oops_offset = data_offset(); |
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865 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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866 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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867 |
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868 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 869 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
870 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
871 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
872 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
873 | |
1748 | 874 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
875 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
876 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 877 _exception_cache = NULL; |
878 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
879 | |
880 // Copy contents of ScopeDescRecorder to nmethod | |
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881 code_buffer->copy_values_to(this); |
0 | 882 debug_info->copy_to(this); |
883 dependencies->copy_to(this); | |
989
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884 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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885 CodeCache::add_scavenge_root_nmethod(this); |
12080 | 886 Universe::heap()->register_nmethod(this); |
989
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887 } |
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888 debug_only(verify_scavenge_root_oops()); |
0 | 889 |
890 CodeCache::commit(this); | |
891 | |
892 // Copy contents of ExceptionHandlerTable to nmethod | |
893 handler_table->copy_to(this); | |
894 nul_chk_table->copy_to(this); | |
895 | |
896 // we use the information of entry points to find out if a method is | |
897 // static or non static | |
898 assert(compiler->is_c2() || | |
899 _method->is_static() == (entry_point() == _verified_entry_point), | |
900 " entry points must be same for static methods and vice versa"); | |
901 } | |
902 | |
100
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903 bool printnmethods = PrintNMethods |
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904 || CompilerOracle::should_print(_method) |
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905 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 906 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
907 print_nmethod(printnmethods); | |
908 } | |
909 } | |
910 | |
911 | |
912 // Print a short set of xml attributes to identify this nmethod. The | |
913 // output should be embedded in some other element. | |
914 void nmethod::log_identity(xmlStream* log) const { | |
915 log->print(" compile_id='%d'", compile_id()); | |
916 const char* nm_kind = compile_kind(); | |
917 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
918 if (compiler() != NULL) { | |
919 log->print(" compiler='%s'", compiler()->name()); | |
920 } | |
1783 | 921 if (TieredCompilation) { |
922 log->print(" level='%d'", comp_level()); | |
923 } | |
0 | 924 } |
925 | |
926 | |
927 #define LOG_OFFSET(log, name) \ | |
928 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
929 log->print(" " XSTR(name) "_offset='%d'" , \ | |
930 (intptr_t)name##_begin() - (intptr_t)this) | |
931 | |
932 | |
933 void nmethod::log_new_nmethod() const { | |
934 if (LogCompilation && xtty != NULL) { | |
935 ttyLocker ttyl; | |
936 HandleMark hm; | |
937 xtty->begin_elem("nmethod"); | |
938 log_identity(xtty); | |
1748 | 939 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 940 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
941 | |
942 LOG_OFFSET(xtty, relocation); | |
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943 LOG_OFFSET(xtty, consts); |
1748 | 944 LOG_OFFSET(xtty, insts); |
0 | 945 LOG_OFFSET(xtty, stub); |
946 LOG_OFFSET(xtty, scopes_data); | |
947 LOG_OFFSET(xtty, scopes_pcs); | |
948 LOG_OFFSET(xtty, dependencies); | |
949 LOG_OFFSET(xtty, handler_table); | |
950 LOG_OFFSET(xtty, nul_chk_table); | |
951 LOG_OFFSET(xtty, oops); | |
952 | |
953 xtty->method(method()); | |
954 xtty->stamp(); | |
955 xtty->end_elem(); | |
956 } | |
957 } | |
958 | |
959 #undef LOG_OFFSET | |
960 | |
961 | |
962 // Print out more verbose output usually for a newly created nmethod. | |
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963 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 964 if (st != NULL) { |
965 ttyLocker ttyl; | |
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966 if (WizardMode) { |
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967 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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968 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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969 } else { |
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970 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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971 } |
0 | 972 } |
973 } | |
974 | |
975 | |
976 void nmethod::print_nmethod(bool printmethod) { | |
977 ttyLocker ttyl; // keep the following output all in one block | |
978 if (xtty != NULL) { | |
979 xtty->begin_head("print_nmethod"); | |
980 xtty->stamp(); | |
981 xtty->end_head(); | |
982 } | |
983 // print the header part first | |
984 print(); | |
985 // then print the requested information | |
986 if (printmethod) { | |
987 print_code(); | |
988 print_pcs(); | |
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989 if (oop_maps()) { |
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990 oop_maps()->print(); |
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991 } |
0 | 992 } |
993 if (PrintDebugInfo) { | |
994 print_scopes(); | |
995 } | |
996 if (PrintRelocations) { | |
997 print_relocations(); | |
998 } | |
999 if (PrintDependencies) { | |
1000 print_dependencies(); | |
1001 } | |
1002 if (PrintExceptionHandlers) { | |
1003 print_handler_table(); | |
1004 print_nul_chk_table(); | |
1005 } | |
1006 if (xtty != NULL) { | |
1007 xtty->tail("print_nmethod"); | |
1008 } | |
1009 } | |
1010 | |
1011 | |
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1012 // Promote one word from an assembly-time handle to a live embedded oop. |
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1013 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1014 if (handle == NULL || |
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1015 // As a special case, IC oops are initialized to 1 or -1. |
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1016 handle == (jobject) Universe::non_oop_word()) { |
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1017 (*dest) = (oop) handle; |
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1018 } else { |
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1019 (*dest) = JNIHandles::resolve_non_null(handle); |
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1020 } |
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1021 } |
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1022 |
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1023 |
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1024 // Have to have the same name because it's called by a template |
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1025 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1026 int length = array->length(); |
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1027 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1028 oop* dest = oops_begin(); |
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1029 for (int index = 0 ; index < length; index++) { |
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1030 initialize_immediate_oop(&dest[index], array->at(index)); |
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1031 } |
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1032 |
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1033 // Now we can fix up all the oops in the code. We need to do this |
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1034 // in the code because the assembler uses jobjects as placeholders. |
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1035 // The code and relocations have already been initialized by the |
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1036 // CodeBlob constructor, so it is valid even at this early point to |
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1037 // iterate over relocations and patch the code. |
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1038 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1039 } |
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1040 |
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1041 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1042 int length = array->length(); |
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1043 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1044 Metadata** dest = metadata_begin(); |
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1045 for (int index = 0 ; index < length; index++) { |
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1046 dest[index] = array->at(index); |
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1047 } |
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1048 } |
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1049 |
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1050 bool nmethod::is_at_poll_return(address pc) { |
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1051 RelocIterator iter(this, pc, pc+1); |
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1052 while (iter.next()) { |
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1053 if (iter.type() == relocInfo::poll_return_type) |
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1054 return true; |
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1055 } |
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1056 return false; |
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1057 } |
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|
1058 |
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1059 |
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1060 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1061 RelocIterator iter(this, pc, pc+1); |
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1062 while (iter.next()) { |
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1063 relocInfo::relocType t = iter.type(); |
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1064 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1065 return true; |
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|
1066 } |
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1067 return false; |
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1068 } |
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|
1069 |
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1070 |
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1071 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1072 // re-patch all oop-bearing instructions, just in case some oops moved |
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1073 RelocIterator iter(this, begin, end); |
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1074 while (iter.next()) { |
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1075 if (iter.type() == relocInfo::oop_type) { |
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1076 oop_Relocation* reloc = iter.oop_reloc(); |
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1077 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1078 oop* dest = reloc->oop_addr(); |
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1079 initialize_immediate_oop(dest, (jobject) *dest); |
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1080 } |
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1081 // Refresh the oop-related bits of this instruction. |
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1082 reloc->fix_oop_relocation(); |
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1083 } else if (iter.type() == relocInfo::metadata_type) { |
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1084 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1085 reloc->fix_metadata_relocation(); |
1563
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1086 } |
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1087 } |
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1088 } |
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1089 |
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1090 |
2375
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1091 void nmethod::verify_oop_relocations() { |
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1092 // Ensure sure that the code matches the current oop values |
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1093 RelocIterator iter(this, NULL, NULL); |
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1094 while (iter.next()) { |
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1095 if (iter.type() == relocInfo::oop_type) { |
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1096 oop_Relocation* reloc = iter.oop_reloc(); |
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1097 if (!reloc->oop_is_immediate()) { |
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1098 reloc->verify_oop_relocation(); |
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1099 } |
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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 |
0 | 1105 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1106 PcDesc* pd = pc_desc_at(pc); | |
1107 guarantee(pd != NULL, "scope must be present"); | |
1108 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1109 pd->obj_decode_offset(), pd->should_reexecute(), |
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1110 pd->return_oop()); |
0 | 1111 } |
1112 | |
1113 | |
1114 void nmethod::clear_inline_caches() { | |
1115 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1116 if (is_zombie()) { | |
1117 return; | |
1118 } | |
1119 | |
1120 RelocIterator iter(this); | |
1121 while (iter.next()) { | |
1122 iter.reloc()->clear_inline_cache(); | |
1123 } | |
1124 } | |
1125 | |
1126 | |
1127 void nmethod::cleanup_inline_caches() { | |
1128 | |
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1129 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1130 |
1131 // If the method is not entrant or zombie then a JMP is plastered over the | |
1132 // first few bytes. If an oop in the old code was there, that oop | |
1133 // should not get GC'd. Skip the first few bytes of oops on | |
1134 // not-entrant methods. | |
1135 address low_boundary = verified_entry_point(); | |
1136 if (!is_in_use()) { | |
1137 low_boundary += NativeJump::instruction_size; | |
1138 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1139 // This means that the low_boundary is going to be a little too high. | |
1140 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1141 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1142 } | |
1143 | |
1144 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1145 ResourceMark rm; | |
1146 RelocIterator iter(this, low_boundary); | |
1147 while(iter.next()) { | |
1148 switch(iter.type()) { | |
1149 case relocInfo::virtual_call_type: | |
1150 case relocInfo::opt_virtual_call_type: { | |
1151 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1152 // Ok, to lookup references to zombies here | |
1153 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1154 if( cb != NULL && cb->is_nmethod() ) { | |
1155 nmethod* nm = (nmethod*)cb; | |
1156 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1157 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1158 } |
1159 break; | |
1160 } | |
1161 case relocInfo::static_call_type: { | |
1162 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1163 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1164 if( cb != NULL && cb->is_nmethod() ) { | |
1165 nmethod* nm = (nmethod*)cb; | |
1166 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1167 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1168 } |
1169 break; | |
1170 } | |
1171 } | |
1172 } | |
1173 } | |
1174 | |
989
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1175 // This is a private interface with the sweeper. |
0 | 1176 void nmethod::mark_as_seen_on_stack() { |
12324
510fbd28919c
8020151: PSR:PERF Large performance regressions when code cache is filled
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|
1177 assert(is_alive(), "Must be an alive method"); |
1644
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1178 // Set the traversal mark to ensure that the sweeper does 2 |
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1179 // cleaning passes before moving to zombie. |
0 | 1180 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1181 } | |
1182 | |
2342
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
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diff
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|
1183 // Tell if a non-entrant method can be converted to a zombie (i.e., |
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
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diff
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|
1184 // there are no activations on the stack, not in use by the VM, |
46a56fac55c7
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|
1185 // and not in use by the ServiceThread) |
0 | 1186 bool nmethod::can_not_entrant_be_converted() { |
1187 assert(is_not_entrant(), "must be a non-entrant method"); | |
1188 | |
1189 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1190 // count can be greater than the stack traversal count before it hits the | |
1191 // nmethod for the second time. | |
2342
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parents:
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diff
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|
1192 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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|
1193 !is_locked_by_vm(); |
0 | 1194 } |
1195 | |
1196 void nmethod::inc_decompile_count() { | |
1783 | 1197 if (!is_compiled_by_c2()) return; |
0 | 1198 // Could be gated by ProfileTraps, but do not bother... |
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1199 Method* m = method(); |
0 | 1200 if (m == NULL) return; |
6725
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1201 MethodData* mdo = m->method_data(); |
0 | 1202 if (mdo == NULL) return; |
6725
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1203 // There is a benign race here. See comments in methodData.hpp. |
0 | 1204 mdo->inc_decompile_count(); |
1205 } | |
1206 | |
1207 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1208 | |
1209 post_compiled_method_unload(); | |
1210 | |
1211 // Since this nmethod is being unloaded, make sure that dependencies | |
1212 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1213 // indicate that this work is being done during a GC. | |
1214 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1215 assert(is_alive != NULL, "Should be non-NULL"); | |
1216 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1217 flush_dependencies(is_alive); | |
1218 | |
1219 // Break cycle between nmethod & method | |
1220 if (TraceClassUnloading && WizardMode) { | |
1221 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
6725
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|
1222 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1223 "), cause(" INTPTR_FORMAT ")", |
1224 this, (address)_method, (address)cause); | |
989
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1225 if (!Universe::heap()->is_gc_active()) |
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1226 cause->klass()->print(); |
0 | 1227 } |
941 | 1228 // Unlink the osr method, so we do not look this up again |
1229 if (is_osr_method()) { | |
1230 invalidate_osr_method(); | |
1231 } | |
6725
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1232 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1233 // so we don't have to break the cycle. Note that it is possible to |
6725
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1234 // have the Method* live here, in case we unload the nmethod because |
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1235 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1236 if (_method != NULL) { |
6725
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1237 // OSR methods point to the Method*, but the Method* does not |
0 | 1238 // point back! |
1239 if (_method->code() == this) { | |
1240 _method->clear_code(); // Break a cycle | |
1241 } | |
1242 _method = NULL; // Clear the method of this dead nmethod | |
1243 } | |
1244 // Make the class unloaded - i.e., change state and notify sweeper | |
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1245 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1246 if (is_in_use()) { |
1247 // Transitioning directly from live to unloaded -- so | |
1248 // we need to force a cache clean-up; remember this | |
1249 // for later on. | |
1250 CodeCache::set_needs_cache_clean(true); | |
1251 } | |
1644
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|
1252 _state = unloaded; |
0 | 1253 |
1109
032260830071
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|
1254 // Log the unloading. |
032260830071
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diff
changeset
|
1255 log_state_change(); |
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|
1256 |
6725
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1257 // The Method* is gone at this point |
0 | 1258 assert(_method == NULL, "Tautology"); |
1259 | |
989
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1260 set_osr_link(NULL); |
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|
1261 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
13074
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8027593: performance drop with constrained codecache starting with hs25 b111
anoll
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13071
diff
changeset
|
1262 NMethodSweeper::report_state_change(this); |
0 | 1263 } |
1264 | |
1265 void nmethod::invalidate_osr_method() { | |
1266 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1267 // Remove from list of active nmethods | |
1268 if (method() != NULL) | |
6940
18fb7da42534
8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
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6806
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changeset
|
1269 method()->method_holder()->remove_osr_nmethod(this); |
0 | 1270 // Set entry as invalid |
1271 _entry_bci = InvalidOSREntryBci; | |
1272 } | |
1273 | |
1109
032260830071
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|
1274 void nmethod::log_state_change() const { |
0 | 1275 if (LogCompilation) { |
1276 if (xtty != NULL) { | |
1277 ttyLocker ttyl; // keep the following output all in one block | |
1644
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|
1278 if (_state == unloaded) { |
1109
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diff
changeset
|
1279 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
032260830071
5057818: codecache full and compiler disabled in bigapps fastdebug run
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parents:
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diff
changeset
|
1280 os::current_thread_id()); |
032260830071
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diff
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|
1281 } else { |
032260830071
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parents:
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diff
changeset
|
1282 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
032260830071
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parents:
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diff
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1283 os::current_thread_id(), |
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1284 (_state == zombie ? " zombie='1'" : "")); |
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1285 } |
0 | 1286 log_identity(xtty); |
1287 xtty->stamp(); | |
1288 xtty->end_elem(); | |
1289 } | |
1290 } | |
1644
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1291 if (PrintCompilation && _state != unloaded) { |
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1292 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1293 } |
1294 } | |
1295 | |
13074
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1296 /** |
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1297 * Common functionality for both make_not_entrant and make_zombie |
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1298 */ |
1141 | 1299 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1300 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1301 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1302 |
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1303 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1304 nmethodLocker nml(this); |
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1305 methodHandle the_method(method()); |
1726 | 1306 No_Safepoint_Verifier nsv; |
0 | 1307 |
12080 | 1308 // during patching, depending on the nmethod state we must notify the GC that |
1309 // code has been unloaded, unregistering it. We cannot do this right while | |
1310 // holding the Patching_lock because we need to use the CodeCache_lock. This | |
1311 // would be prone to deadlocks. | |
1312 // This flag is used to remember whether we need to later lock and unregister. | |
1313 bool nmethod_needs_unregister = false; | |
1314 | |
0 | 1315 { |
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1316 // invalidate osr nmethod before acquiring the patching lock since |
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1317 // they both acquire leaf locks and we don't want a deadlock. |
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1318 // This logic is equivalent to the logic below for patching the |
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1319 // verified entry point of regular methods. |
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1320 if (is_osr_method()) { |
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1321 // this effectively makes the osr nmethod not entrant |
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1322 invalidate_osr_method(); |
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1323 } |
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1324 |
0 | 1325 // Enter critical section. Does not block for safepoint. |
1326 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1327 |
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1328 if (_state == state) { |
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1329 // another thread already performed this transition so nothing |
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1330 // to do, but return false to indicate this. |
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1331 return false; |
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1332 } |
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1333 |
0 | 1334 // The caller can be calling the method statically or through an inline |
1335 // cache call. | |
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1336 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1337 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1338 SharedRuntime::get_handle_wrong_method_stub()); | |
1339 } | |
1340 | |
1644
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1341 if (is_in_use()) { |
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1342 // It's a true state change, so mark the method as decompiled. |
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1343 // Do it only for transition from alive. |
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1344 inc_decompile_count(); |
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1345 } |
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1346 |
12080 | 1347 // If the state is becoming a zombie, signal to unregister the nmethod with |
1348 // the heap. | |
1349 // This nmethod may have already been unloaded during a full GC. | |
1350 if ((state == zombie) && !is_unloaded()) { | |
1351 nmethod_needs_unregister = true; | |
1352 } | |
1353 | |
12324
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1354 // Must happen before state change. Otherwise we have a race condition in |
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1355 // nmethod::can_not_entrant_be_converted(). I.e., a method can immediately |
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1356 // transition its state from 'not_entrant' to 'zombie' without having to wait |
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1357 // for stack scanning. |
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1358 if (state == not_entrant) { |
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1359 mark_as_seen_on_stack(); |
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1360 OrderAccess::storestore(); |
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1361 } |
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1362 |
0 | 1363 // Change state |
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1364 _state = state; |
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1365 |
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1366 // Log the transition once |
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1367 log_state_change(); |
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1368 |
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1369 // Remove nmethod from method. |
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1370 // We need to check if both the _code and _from_compiled_code_entry_point |
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1371 // refer to this nmethod because there is a race in setting these two fields |
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1372 // in Method* as seen in bugid 4947125. |
1644
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1373 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1374 // could be flushed and the compiler and vtable stubs could still call |
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1375 // through it. |
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1376 if (method() != NULL && (method()->code() == this || |
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1377 method()->from_compiled_entry() == verified_entry_point())) { |
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1378 HandleMark hm; |
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1379 method()->clear_code(); |
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1380 } |
0 | 1381 } // leave critical region under Patching_lock |
1382 | |
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1383 // When the nmethod becomes zombie it is no longer alive so the |
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1384 // dependencies must be flushed. nmethods in the not_entrant |
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1385 // state will be flushed later when the transition to zombie |
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1386 // happens or they get unloaded. |
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1387 if (state == zombie) { |
1726 | 1388 { |
1389 // Flushing dependecies must be done before any possible | |
1390 // safepoint can sneak in, otherwise the oops used by the | |
1391 // dependency logic could have become stale. | |
1392 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
12080 | 1393 if (nmethod_needs_unregister) { |
1394 Universe::heap()->unregister_nmethod(this); | |
1395 } | |
1726 | 1396 flush_dependencies(NULL); |
1397 } | |
1644
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1398 |
2342
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1399 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1400 // event and it hasn't already been reported for this nmethod then |
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1401 // report it now. The event may have been reported earilier if the GC |
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1402 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1403 // we no longer go to a safepoint here. |
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1404 post_compiled_method_unload(); |
1726 | 1405 |
1406 #ifdef ASSERT | |
1407 // It's no longer safe to access the oops section since zombie | |
1408 // nmethods aren't scanned for GC. | |
1409 _oops_are_stale = true; | |
1410 #endif | |
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1411 // the Method may be reclaimed by class unloading now that the |
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1412 // nmethod is in zombie state |
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1413 set_method(NULL); |
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1414 } else { |
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1415 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1416 } |
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1417 |
0 | 1418 if (TraceCreateZombies) { |
1419 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1420 } | |
1421 | |
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1422 NMethodSweeper::report_state_change(this); |
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1423 return true; |
0 | 1424 } |
1425 | |
1426 void nmethod::flush() { | |
1427 // Note that there are no valid oops in the nmethod anymore. | |
1428 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1429 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1430 | |
1431 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1432 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1433 |
1434 // completely deallocate this method | |
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1435 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1436 if (PrintMethodFlushing) { |
1202 | 1437 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1438 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1439 } |
1440 | |
1441 // We need to deallocate any ExceptionCache data. | |
1442 // Note that we do not need to grab the nmethod lock for this, it | |
1443 // better be thread safe if we're disposing of it! | |
1444 ExceptionCache* ec = exception_cache(); | |
1445 set_exception_cache(NULL); | |
1446 while(ec != NULL) { | |
1447 ExceptionCache* next = ec->next(); | |
1448 delete ec; | |
1449 ec = next; | |
1450 } | |
1451 | |
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1452 if (on_scavenge_root_list()) { |
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1453 CodeCache::drop_scavenge_root_nmethod(this); |
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1454 } |
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1455 |
1692 | 1456 #ifdef SHARK |
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1457 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1458 #endif // SHARK |
1459 | |
0 | 1460 ((CodeBlob*)(this))->flush(); |
1461 | |
1462 CodeCache::free(this); | |
1463 } | |
1464 | |
1465 | |
1466 // | |
1467 // Notify all classes this nmethod is dependent on that it is no | |
1468 // longer dependent. This should only be called in two situations. | |
1469 // First, when a nmethod transitions to a zombie all dependents need | |
1470 // to be clear. Since zombification happens at a safepoint there's no | |
1471 // synchronization issues. The second place is a little more tricky. | |
1472 // During phase 1 of mark sweep class unloading may happen and as a | |
1473 // result some nmethods may get unloaded. In this case the flushing | |
1474 // of dependencies must happen during phase 1 since after GC any | |
1475 // dependencies in the unloaded nmethod won't be updated, so | |
1476 // traversing the dependency information in unsafe. In that case this | |
1477 // function is called with a non-NULL argument and this function only | |
1478 // notifies instanceKlasses that are reachable | |
1479 | |
1480 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1481 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1482 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1483 "is_alive is non-NULL if and only if we are called during GC"); | |
1484 if (!has_flushed_dependencies()) { | |
1485 set_has_flushed_dependencies(); | |
1486 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1487 Klass* klass = deps.context_type(); |
0 | 1488 if (klass == NULL) continue; // ignore things like evol_method |
1489 | |
1490 // During GC the is_alive closure is non-NULL, and is used to | |
1491 // determine liveness of dependees that need to be updated. | |
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1492 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1493 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1494 } |
1495 } | |
1496 } | |
1497 } | |
1498 | |
1499 | |
1500 // If this oop is not live, the nmethod can be unloaded. | |
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1501 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { |
0 | 1502 assert(root != NULL, "just checking"); |
1503 oop obj = *root; | |
1504 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1505 return false; | |
1506 } | |
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1507 |
989
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1508 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1509 // simply because one of its constant oops has gone dead. |
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1510 // No actual classes need to be unloaded in order for this to occur. |
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1511 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1512 make_unloaded(is_alive, obj); |
1513 return true; | |
1514 } | |
1515 | |
1516 // ------------------------------------------------------------------ | |
1517 // post_compiled_method_load_event | |
1518 // new method for install_code() path | |
1519 // Transfer information from compilation to jvmti | |
1520 void nmethod::post_compiled_method_load_event() { | |
1521 | |
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1522 Method* moop = method(); |
4006 | 1523 #ifndef USDT2 |
0 | 1524 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1525 moop->klass_name()->bytes(), | |
1526 moop->klass_name()->utf8_length(), | |
1527 moop->name()->bytes(), | |
1528 moop->name()->utf8_length(), | |
1529 moop->signature()->bytes(), | |
1530 moop->signature()->utf8_length(), | |
1748 | 1531 insts_begin(), insts_size()); |
4006 | 1532 #else /* USDT2 */ |
1533 HOTSPOT_COMPILED_METHOD_LOAD( | |
1534 (char *) moop->klass_name()->bytes(), | |
1535 moop->klass_name()->utf8_length(), | |
1536 (char *) moop->name()->bytes(), | |
1537 moop->name()->utf8_length(), | |
1538 (char *) moop->signature()->bytes(), | |
1539 moop->signature()->utf8_length(), | |
1540 insts_begin(), insts_size()); | |
1541 #endif /* USDT2 */ | |
0 | 1542 |
1616
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1543 if (JvmtiExport::should_post_compiled_method_load() || |
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1544 JvmtiExport::should_post_compiled_method_unload()) { |
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1545 get_and_cache_jmethod_id(); |
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|
1546 } |
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1547 |
0 | 1548 if (JvmtiExport::should_post_compiled_method_load()) { |
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1549 // Let the Service thread (which is a real Java thread) post the event |
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1550 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1551 JvmtiDeferredEventQueue::enqueue( |
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1552 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1553 } |
1554 } | |
1555 | |
1616
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1556 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1557 if (_jmethod_id == NULL) { |
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1558 // Cache the jmethod_id since it can no longer be looked up once the |
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1559 // method itself has been marked for unloading. |
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1560 _jmethod_id = method()->jmethod_id(); |
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|
1561 } |
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1562 return _jmethod_id; |
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1563 } |
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1564 |
0 | 1565 void nmethod::post_compiled_method_unload() { |
1577
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1566 if (unload_reported()) { |
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1567 // During unloading we transition to unloaded and then to zombie |
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1568 // and the unloading is reported during the first transition. |
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1569 return; |
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1570 } |
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1571 |
0 | 1572 assert(_method != NULL && !is_unloaded(), "just checking"); |
1573 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1574 | |
1575 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1576 // post the event. Sometime later this nmethod will be made a zombie |
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1577 // by the sweeper but the Method* will not be valid at that point. |
1616
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1578 // If the _jmethod_id is null then no load event was ever requested |
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1579 // so don't bother posting the unload. The main reason for this is |
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1580 // that the jmethodID is a weak reference to the Method* so if |
1616
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1581 // it's being unloaded there's no way to look it up since the weak |
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1582 // ref will have been cleared. |
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1583 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1584 assert(!unload_reported(), "already unloaded"); |
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1585 JvmtiDeferredEvent event = |
2342
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1586 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1587 _jmethod_id, insts_begin()); |
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1588 if (SafepointSynchronize::is_at_safepoint()) { |
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1589 // Don't want to take the queueing lock. Add it as pending and |
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1590 // it will get enqueued later. |
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1591 JvmtiDeferredEventQueue::add_pending_event(event); |
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1592 } else { |
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1593 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1594 JvmtiDeferredEventQueue::enqueue(event); |
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1595 } |
0 | 1596 } |
1597 | |
1598 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1599 // any time. As the nmethod is being unloaded now we mark it has | |
1600 // having the unload event reported - this will ensure that we don't | |
1601 // attempt to report the event in the unlikely scenario where the | |
1602 // event is enabled at the time the nmethod is made a zombie. | |
1603 set_unload_reported(); | |
1604 } | |
1605 | |
1606 // This is called at the end of the strong tracing/marking phase of a | |
1607 // GC to unload an nmethod if it contains otherwise unreachable | |
1608 // oops. | |
1609 | |
6787
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1610 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 1611 // Make sure the oop's ready to receive visitors |
1612 assert(!is_zombie() && !is_unloaded(), | |
1613 "should not call follow on zombie or unloaded nmethod"); | |
1614 | |
1615 // If the method is not entrant then a JMP is plastered over the | |
1616 // first few bytes. If an oop in the old code was there, that oop | |
1617 // should not get GC'd. Skip the first few bytes of oops on | |
1618 // not-entrant methods. | |
1619 address low_boundary = verified_entry_point(); | |
1620 if (is_not_entrant()) { | |
1621 low_boundary += NativeJump::instruction_size; | |
1622 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1623 // (See comment above.) | |
1624 } | |
1625 | |
1626 // The RedefineClasses() API can cause the class unloading invariant | |
1627 // to no longer be true. See jvmtiExport.hpp for details. | |
1628 // Also, leave a debugging breadcrumb in local flag. | |
1629 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1630 if (a_class_was_redefined) { | |
1631 // This set of the unloading_occurred flag is done before the | |
1632 // call to post_compiled_method_unload() so that the unloading | |
1633 // of this nmethod is reported. | |
1634 unloading_occurred = true; | |
1635 } | |
1636 | |
1637 // Exception cache | |
1638 ExceptionCache* ec = exception_cache(); | |
1639 while (ec != NULL) { | |
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1640 Klass* ex_klass = ec->exception_type(); |
0 | 1641 ExceptionCache* next_ec = ec->next(); |
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1642 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1643 remove_from_exception_cache(ec); |
1644 } | |
1645 ec = next_ec; | |
1646 } | |
1647 | |
1648 // If class unloading occurred we first iterate over all inline caches and | |
1649 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1650 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1651 // iteration below. | |
1652 if (unloading_occurred) { | |
1653 RelocIterator iter(this, low_boundary); | |
1654 while(iter.next()) { | |
1655 if (iter.type() == relocInfo::virtual_call_type) { | |
1656 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1657 if (ic->is_icholder_call()) { |
0 | 1658 // The only exception is compiledICHolder oops which may |
1659 // yet be marked below. (We check this further below). | |
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1660 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1661 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1662 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
13441 | 1663 continue; |
1664 } | |
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1665 } else { |
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1666 Metadata* ic_oop = ic->cached_metadata(); |
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1667 if (ic_oop != NULL) { |
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1668 if (ic_oop->is_klass()) { |
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1669 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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1670 continue; |
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|
1671 } |
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1672 } else if (ic_oop->is_method()) { |
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1673 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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1674 continue; |
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|
1675 } |
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1676 } else { |
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|
1677 ShouldNotReachHere(); |
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|
1678 } |
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1679 } |
13441 | 1680 } |
1681 ic->set_to_clean(); | |
0 | 1682 } |
1683 } | |
1684 } | |
1685 | |
1686 // Compiled code | |
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1687 { |
0 | 1688 RelocIterator iter(this, low_boundary); |
1689 while (iter.next()) { | |
1690 if (iter.type() == relocInfo::oop_type) { | |
1691 oop_Relocation* r = iter.oop_reloc(); | |
1692 // In this loop, we must only traverse those oops directly embedded in | |
1693 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1694 assert(1 == (r->oop_is_immediate()) + | |
1695 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1696 "oop must be found in exactly one place"); | |
1697 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
6787
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1698 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
0 | 1699 return; |
1700 } | |
1701 } | |
1702 } | |
1703 } | |
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1704 } |
0 | 1705 |
1706 | |
1707 // Scopes | |
1708 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1709 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
6787
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1710 if (can_unload(is_alive, p, unloading_occurred)) { |
0 | 1711 return; |
1712 } | |
1713 } | |
1714 | |
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1715 // Ensure that all metadata is still alive |
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1716 verify_metadata_loaders(low_boundary, is_alive); |
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1717 } |
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1718 |
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|
1719 #ifdef ASSERT |
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1720 |
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|
1721 class CheckClass : AllStatic { |
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|
1722 static BoolObjectClosure* _is_alive; |
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1723 |
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1724 // Check class_loader is alive for this bit of metadata. |
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|
1725 static void check_class(Metadata* md) { |
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1726 Klass* klass = NULL; |
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1727 if (md->is_klass()) { |
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1728 klass = ((Klass*)md); |
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1729 } else if (md->is_method()) { |
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1730 klass = ((Method*)md)->method_holder(); |
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1731 } else if (md->is_methodData()) { |
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1732 klass = ((MethodData*)md)->method()->method_holder(); |
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1733 } else { |
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1734 md->print(); |
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1735 ShouldNotReachHere(); |
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1736 } |
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1737 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1738 } |
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1739 public: |
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1740 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1741 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1742 _is_alive = is_alive; |
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1743 nm->metadata_do(check_class); |
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1744 } |
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1745 }; |
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1746 |
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1747 // This is called during a safepoint so can use static data |
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1748 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1749 #endif // ASSERT |
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1750 |
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1751 |
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1752 // Processing of oop references should have been sufficient to keep |
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1753 // all strong references alive. Any weak references should have been |
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1754 // cleared as well. Visit all the metadata and ensure that it's |
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1755 // really alive. |
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1756 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1757 #ifdef ASSERT |
0 | 1758 RelocIterator iter(this, low_boundary); |
1759 while (iter.next()) { | |
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1760 // static_stub_Relocations may have dangling references to |
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1761 // Method*s so trim them out here. Otherwise it looks like |
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1762 // compiled code is maintaining a link to dead metadata. |
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1763 address static_call_addr = NULL; |
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1764 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1765 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1766 if (!cic->is_call_to_interpreted()) { |
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1767 static_call_addr = iter.addr(); |
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1768 } |
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1769 } else if (iter.type() == relocInfo::static_call_type) { |
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1770 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1771 if (!csc->is_call_to_interpreted()) { |
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1772 static_call_addr = iter.addr(); |
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1773 } |
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1774 } |
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1775 if (static_call_addr != NULL) { |
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1776 RelocIterator sciter(this, low_boundary); |
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1777 while (sciter.next()) { |
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1778 if (sciter.type() == relocInfo::static_stub_type && |
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1779 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1780 sciter.static_stub_reloc()->clear_inline_cache(); |
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1781 } |
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1782 } |
0 | 1783 } |
1784 } | |
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1785 // Check that the metadata embedded in the nmethod is alive |
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1786 CheckClass::do_check_class(is_alive, this); |
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1787 #endif |
0 | 1788 } |
1789 | |
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1790 |
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1791 // Iterate over metadata calling this function. Used by RedefineClasses |
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1792 void nmethod::metadata_do(void f(Metadata*)) { |
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1793 address low_boundary = verified_entry_point(); |
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1794 if (is_not_entrant()) { |
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1795 low_boundary += NativeJump::instruction_size; |
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1796 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1797 // (See comment above.) |
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1798 } |
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1799 { |
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1800 // Visit all immediate references that are embedded in the instruction stream. |
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1801 RelocIterator iter(this, low_boundary); |
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1802 while (iter.next()) { |
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1803 if (iter.type() == relocInfo::metadata_type ) { |
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1804 metadata_Relocation* r = iter.metadata_reloc(); |
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1805 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1806 // the code. Other metadatas (oop_index>0) are seen as part of |
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1807 // the metadata section below. |
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1808 assert(1 == (r->metadata_is_immediate()) + |
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1809 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1810 "metadata must be found in exactly one place"); |
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1811 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1812 Metadata* md = r->metadata_value(); |
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1813 f(md); |
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1814 } |
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1815 } else if (iter.type() == relocInfo::virtual_call_type) { |
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1816 // Check compiledIC holders associated with this nmethod |
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1817 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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1818 if (ic->is_icholder_call()) { |
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1819 CompiledICHolder* cichk = ic->cached_icholder(); |
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1820 f(cichk->holder_method()); |
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1821 f(cichk->holder_klass()); |
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1822 } else { |
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1823 Metadata* ic_oop = ic->cached_metadata(); |
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1824 if (ic_oop != NULL) { |
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1825 f(ic_oop); |
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1826 } |
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1827 } |
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1828 } |
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1829 } |
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1830 } |
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1831 |
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1832 // Visit the metadata section |
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1833 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1834 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1835 Metadata* md = *p; |
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1836 f(md); |
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1837 } |
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1838 |
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1839 // Call function Method*, not embedded in these other places. |
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1840 if (_method != NULL) f(_method); |
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1841 } |
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1842 |
12080 | 1843 void nmethod::oops_do(OopClosure* f, bool allow_zombie) { |
0 | 1844 // make sure the oops ready to receive visitors |
12080 | 1845 assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod"); |
1846 assert(!is_unloaded(), "should not call follow on unloaded nmethod"); | |
0 | 1847 |
1848 // If the method is not entrant or zombie then a JMP is plastered over the | |
1849 // first few bytes. If an oop in the old code was there, that oop | |
1850 // should not get GC'd. Skip the first few bytes of oops on | |
1851 // not-entrant methods. | |
1852 address low_boundary = verified_entry_point(); | |
1853 if (is_not_entrant()) { | |
1854 low_boundary += NativeJump::instruction_size; | |
1855 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1856 // (See comment above.) | |
1857 } | |
1858 | |
1859 RelocIterator iter(this, low_boundary); | |
941 | 1860 |
0 | 1861 while (iter.next()) { |
1862 if (iter.type() == relocInfo::oop_type ) { | |
1863 oop_Relocation* r = iter.oop_reloc(); | |
1864 // In this loop, we must only follow those oops directly embedded in | |
1865 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1866 assert(1 == (r->oop_is_immediate()) + |
1867 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1868 "oop must be found in exactly one place"); | |
0 | 1869 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1870 f->do_oop(r->oop_addr()); | |
1871 } | |
1872 } | |
1873 } | |
1874 | |
1875 // Scopes | |
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1876 // This includes oop constants not inlined in the code stream. |
0 | 1877 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1878 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1879 f->do_oop(p); | |
1880 } | |
1881 } | |
1882 | |
989
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1883 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1884 |
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1885 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1886 |
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1887 // An nmethod is "marked" if its _mark_link is set non-null. |
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1888 // Even if it is the end of the linked list, it will have a non-null link value, |
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1889 // as long as it is on the list. |
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1890 // This code must be MP safe, because it is used from parallel GC passes. |
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1891 bool nmethod::test_set_oops_do_mark() { |
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1892 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1893 nmethod* observed_mark_link = _oops_do_mark_link; |
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1894 if (observed_mark_link == NULL) { |
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1895 // Claim this nmethod for this thread to mark. |
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1896 observed_mark_link = (nmethod*) |
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1897 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1898 if (observed_mark_link == NULL) { |
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1899 |
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1900 // Atomically append this nmethod (now claimed) to the head of the list: |
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1901 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1902 for (;;) { |
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1903 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1904 _oops_do_mark_link = required_mark_nmethods; |
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1905 observed_mark_nmethods = (nmethod*) |
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1906 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1907 if (observed_mark_nmethods == required_mark_nmethods) |
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1908 break; |
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1909 } |
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1910 // Mark was clear when we first saw this guy. |
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1911 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
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1912 return false; |
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1913 } |
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1914 } |
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1915 // On fall through, another racing thread marked this nmethod before we did. |
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1916 return true; |
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1917 } |
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1918 |
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1919 void nmethod::oops_do_marking_prologue() { |
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1920 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1921 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1922 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1923 // may fork a bunch of threads, and we need them all to see the same state. |
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1924 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1925 guarantee(observed == NULL, "no races in this sequential code"); |
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1926 } |
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1927 |
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1928 void nmethod::oops_do_marking_epilogue() { |
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1929 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1930 nmethod* cur = _oops_do_mark_nmethods; |
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1931 while (cur != NMETHOD_SENTINEL) { |
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1932 assert(cur != NULL, "not NULL-terminated"); |
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1933 nmethod* next = cur->_oops_do_mark_link; |
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1934 cur->_oops_do_mark_link = NULL; |
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1935 cur->fix_oop_relocations(); |
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1936 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
989
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1937 cur = next; |
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1938 } |
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1939 void* required = _oops_do_mark_nmethods; |
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1940 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1941 guarantee(observed == required, "no races in this sequential code"); |
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1942 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1943 } |
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1944 |
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1945 class DetectScavengeRoot: public OopClosure { |
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1946 bool _detected_scavenge_root; |
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1947 public: |
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1948 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1949 { NOT_PRODUCT(_print_nm = NULL); } |
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1950 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1951 virtual void do_oop(oop* p) { |
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1952 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1953 NOT_PRODUCT(maybe_print(p)); |
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1954 _detected_scavenge_root = true; |
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1955 } |
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1956 } |
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1957 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1958 |
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1959 #ifndef PRODUCT |
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1960 nmethod* _print_nm; |
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1961 void maybe_print(oop* p) { |
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1962 if (_print_nm == NULL) return; |
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1963 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1964 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1965 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1966 (void *)(*p), (intptr_t)p); |
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1967 (*p)->print(); |
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1968 } |
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1969 #endif //PRODUCT |
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1970 }; |
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1971 |
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1972 bool nmethod::detect_scavenge_root_oops() { |
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1973 DetectScavengeRoot detect_scavenge_root; |
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1974 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1975 oops_do(&detect_scavenge_root); |
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1976 return detect_scavenge_root.detected_scavenge_root(); |
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1977 } |
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1978 |
0 | 1979 // Method that knows how to preserve outgoing arguments at call. This method must be |
1980 // called with a frame corresponding to a Java invoke | |
1981 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1982 #ifndef SHARK |
0 | 1983 if (!method()->is_native()) { |
1984 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1985 Bytecode_invoke call(ssd.method(), ssd.bci()); |
10390 | 1986 bool has_receiver = call.has_receiver(); |
1987 bool has_appendix = call.has_appendix(); | |
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1988 Symbol* signature = call.signature(); |
10390 | 1989 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f); |
0 | 1990 } |
1692 | 1991 #endif // !SHARK |
0 | 1992 } |
1993 | |
1994 | |
1995 oop nmethod::embeddedOop_at(u_char* p) { | |
2349
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1996 RelocIterator iter(this, p, p + 1); |
0 | 1997 while (iter.next()) |
1998 if (iter.type() == relocInfo::oop_type) { | |
1999 return iter.oop_reloc()->oop_value(); | |
2000 } | |
2001 return NULL; | |
2002 } | |
2003 | |
2004 | |
2005 inline bool includes(void* p, void* from, void* to) { | |
2006 return from <= p && p < to; | |
2007 } | |
2008 | |
2009 | |
2010 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
2011 assert(count >= 2, "must be sentinel values, at least"); | |
2012 | |
2013 #ifdef ASSERT | |
2014 // must be sorted and unique; we do a binary search in find_pc_desc() | |
2015 int prev_offset = pcs[0].pc_offset(); | |
2016 assert(prev_offset == PcDesc::lower_offset_limit, | |
2017 "must start with a sentinel"); | |
2018 for (int i = 1; i < count; i++) { | |
2019 int this_offset = pcs[i].pc_offset(); | |
2020 assert(this_offset > prev_offset, "offsets must be sorted"); | |
2021 prev_offset = this_offset; | |
2022 } | |
2023 assert(prev_offset == PcDesc::upper_offset_limit, | |
2024 "must end with a sentinel"); | |
2025 #endif //ASSERT | |
2026 | |
1135
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2027 // Search for MethodHandle invokes and tag the nmethod. |
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2028 for (int i = 0; i < count; i++) { |
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2029 if (pcs[i].is_method_handle_invoke()) { |
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2030 set_has_method_handle_invokes(true); |
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2031 break; |
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2032 } |
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2033 } |
2083
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2034 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2035 |
0 | 2036 int size = count * sizeof(PcDesc); |
2037 assert(scopes_pcs_size() >= size, "oob"); | |
2038 memcpy(scopes_pcs_begin(), pcs, size); | |
2039 | |
2040 // Adjust the final sentinel downward. | |
2041 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2042 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2043 last_pc->set_pc_offset(content_size() + 1); |
0 | 2044 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2045 // Fill any rounding gaps with copies of the last record. | |
2046 last_pc[1] = last_pc[0]; | |
2047 } | |
2048 // The following assert could fail if sizeof(PcDesc) is not | |
2049 // an integral multiple of oopSize (the rounding term). | |
2050 // If it fails, change the logic to always allocate a multiple | |
2051 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2052 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2053 } | |
2054 | |
2055 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2056 assert(scopes_data_size() >= size, "oob"); | |
2057 memcpy(scopes_data_begin(), buffer, size); | |
2058 } | |
2059 | |
2060 | |
2061 #ifdef ASSERT | |
2062 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2063 PcDesc* lower = nm->scopes_pcs_begin(); | |
2064 PcDesc* upper = nm->scopes_pcs_end(); | |
2065 lower += 1; // exclude initial sentinel | |
2066 PcDesc* res = NULL; | |
2067 for (PcDesc* p = lower; p < upper; p++) { | |
2068 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2069 if (match_desc(p, pc_offset, approximate)) { | |
2070 if (res == NULL) | |
2071 res = p; | |
2072 else | |
2073 res = (PcDesc*) badAddress; | |
2074 } | |
2075 } | |
2076 return res; | |
2077 } | |
2078 #endif | |
2079 | |
2080 | |
2081 // Finds a PcDesc with real-pc equal to "pc" | |
2082 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2083 address base_address = code_begin(); |
0 | 2084 if ((pc < base_address) || |
2085 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2086 return NULL; // PC is wildly out of range | |
2087 } | |
2088 int pc_offset = (int) (pc - base_address); | |
2089 | |
2090 // Check the PcDesc cache if it contains the desired PcDesc | |
2091 // (This as an almost 100% hit rate.) | |
2092 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2093 if (res != NULL) { | |
2094 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2095 return res; | |
2096 } | |
2097 | |
2098 // Fallback algorithm: quasi-linear search for the PcDesc | |
2099 // Find the last pc_offset less than the given offset. | |
2100 // The successor must be the required match, if there is a match at all. | |
2101 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2102 PcDesc* lower = scopes_pcs_begin(); | |
2103 PcDesc* upper = scopes_pcs_end(); | |
2104 upper -= 1; // exclude final sentinel | |
2105 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2106 | |
2107 #define assert_LU_OK \ | |
2108 /* invariant on lower..upper during the following search: */ \ | |
2109 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2110 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2111 assert_LU_OK; | |
2112 | |
2113 // Use the last successful return as a split point. | |
2114 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2115 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2116 if (mid->pc_offset() < pc_offset) { | |
2117 lower = mid; | |
2118 } else { | |
2119 upper = mid; | |
2120 } | |
2121 | |
2122 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2123 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2124 const int RADIX = (1 << LOG2_RADIX); | |
2125 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2126 while ((mid = lower + step) < upper) { | |
2127 assert_LU_OK; | |
2128 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2129 if (mid->pc_offset() < pc_offset) { | |
2130 lower = mid; | |
2131 } else { | |
2132 upper = mid; | |
2133 break; | |
2134 } | |
2135 } | |
2136 assert_LU_OK; | |
2137 } | |
2138 | |
2139 // Sneak up on the value with a linear search of length ~16. | |
2140 while (true) { | |
2141 assert_LU_OK; | |
2142 mid = lower + 1; | |
2143 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2144 if (mid->pc_offset() < pc_offset) { | |
2145 lower = mid; | |
2146 } else { | |
2147 upper = mid; | |
2148 break; | |
2149 } | |
2150 } | |
2151 #undef assert_LU_OK | |
2152 | |
2153 if (match_desc(upper, pc_offset, approximate)) { | |
2154 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2155 _pc_desc_cache.add_pc_desc(upper); | |
2156 return upper; | |
2157 } else { | |
2158 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2159 return NULL; | |
2160 } | |
2161 } | |
2162 | |
2163 | |
2164 bool nmethod::check_all_dependencies() { | |
2165 bool found_check = false; | |
2166 // wholesale check of all dependencies | |
2167 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2168 if (deps.check_dependency() != NULL) { | |
2169 found_check = true; | |
2170 NOT_DEBUG(break); | |
2171 } | |
2172 } | |
2173 return found_check; // tell caller if we found anything | |
2174 } | |
2175 | |
2176 bool nmethod::check_dependency_on(DepChange& changes) { | |
2177 // What has happened: | |
2178 // 1) a new class dependee has been added | |
2179 // 2) dependee and all its super classes have been marked | |
2180 bool found_check = false; // set true if we are upset | |
2181 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2182 // Evaluate only relevant dependencies. | |
2183 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2184 found_check = true; | |
2185 NOT_DEBUG(break); | |
2186 } | |
2187 } | |
2188 return found_check; | |
2189 } | |
2190 | |
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2191 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2192 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2193 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2194 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2195 if (deps.type() == Dependencies::evol_method) { | |
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2196 Method* method = deps.method_argument(0); |
0 | 2197 for (int j = 0; j < dependee_methods->length(); j++) { |
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2198 if (dependee_methods->at(j) == method) { |
0 | 2199 // RC_TRACE macro has an embedded ResourceMark |
2200 RC_TRACE(0x01000000, | |
2201 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2202 _method->method_holder()->external_name(), |
0 | 2203 _method->name()->as_C_string(), |
2204 _method->signature()->as_C_string(), compile_id(), | |
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2205 method->method_holder()->external_name(), |
0 | 2206 method->name()->as_C_string(), |
2207 method->signature()->as_C_string())); | |
2208 if (TraceDependencies || LogCompilation) | |
2209 deps.log_dependency(dependee); | |
2210 return true; | |
2211 } | |
2212 } | |
2213 } | |
2214 } | |
2215 return false; | |
2216 } | |
2217 | |
2218 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2219 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2220 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2221 if (deps.type() != Dependencies::evol_method) | |
2222 continue; | |
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2223 Method* method = deps.method_argument(0); |
0 | 2224 if (method == dependee) return true; |
2225 } | |
2226 return false; | |
2227 } | |
2228 | |
2229 | |
2230 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2231 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2232 if (is_zombie()) { |
2233 // a zombie may never be patched | |
2234 return false; | |
2235 } | |
2236 return true; | |
2237 } | |
2238 | |
2239 | |
2240 address nmethod::continuation_for_implicit_exception(address pc) { | |
2241 // Exception happened outside inline-cache check code => we are inside | |
2242 // an active nmethod => use cpc to determine a return address | |
1748 | 2243 int exception_offset = pc - code_begin(); |
0 | 2244 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2245 #ifdef ASSERT | |
2246 if (cont_offset == 0) { | |
2247 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2248 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2249 HandleMark hm(thread); | |
2250 ResourceMark rm(thread); | |
2251 CodeBlob* cb = CodeCache::find_blob(pc); | |
2252 assert(cb != NULL && cb == this, ""); | |
2253 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2254 print(); | |
2255 method()->print_codes(); | |
2256 print_code(); | |
2257 print_pcs(); | |
2258 } | |
2259 #endif | |
1250 | 2260 if (cont_offset == 0) { |
2261 // Let the normal error handling report the exception | |
2262 return NULL; | |
2263 } | |
1748 | 2264 return code_begin() + cont_offset; |
0 | 2265 } |
2266 | |
2267 | |
2268 | |
2269 void nmethod_init() { | |
2270 // make sure you didn't forget to adjust the filler fields | |
2271 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2272 } | |
2273 | |
2274 | |
2275 //------------------------------------------------------------------------------------------- | |
2276 | |
2277 | |
2278 // QQQ might we make this work from a frame?? | |
2279 nmethodLocker::nmethodLocker(address pc) { | |
2280 CodeBlob* cb = CodeCache::find_blob(pc); | |
2281 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2282 _nm = (nmethod*)cb; | |
2283 lock_nmethod(_nm); | |
2284 } | |
2285 | |
2342
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2286 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2287 // should pass zombie_ok == true. |
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2288 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2289 if (nm == NULL) return; |
2290 Atomic::inc(&nm->_lock_count); | |
2342
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2291 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2292 } |
2293 | |
2294 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2295 if (nm == NULL) return; | |
2296 Atomic::dec(&nm->_lock_count); | |
2297 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2298 } | |
2299 | |
1204 | 2300 |
2301 // ----------------------------------------------------------------------------- | |
2302 // nmethod::get_deopt_original_pc | |
2303 // | |
2304 // Return the original PC for the given PC if: | |
2305 // (a) the given PC belongs to a nmethod and | |
2306 // (b) it is a deopt PC | |
2307 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2308 if (fr->cb() == NULL) return NULL; | |
2309 | |
2310 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2311 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2312 return nm->get_original_pc(fr); | |
2313 | |
2314 return NULL; | |
0 | 2315 } |
2316 | |
2317 | |
2318 // ----------------------------------------------------------------------------- | |
1135
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2319 // MethodHandle |
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2320 |
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2321 bool nmethod::is_method_handle_return(address return_pc) { |
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2322 if (!has_method_handle_invokes()) return false; |
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2323 PcDesc* pd = pc_desc_at(return_pc); |
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2324 if (pd == NULL) |
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2325 return false; |
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2326 return pd->is_method_handle_invoke(); |
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2327 } |
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2328 |
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2329 |
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2330 // ----------------------------------------------------------------------------- |
0 | 2331 // Verification |
2332 | |
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2333 class VerifyOopsClosure: public OopClosure { |
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2334 nmethod* _nm; |
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2335 bool _ok; |
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2336 public: |
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2337 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2338 bool ok() { return _ok; } |
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2339 virtual void do_oop(oop* p) { |
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2340 if ((*p) == NULL || (*p)->is_oop()) return; |
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2341 if (_ok) { |
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2342 _nm->print_nmethod(true); |
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2343 _ok = false; |
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2344 } |
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2345 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2346 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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2347 } |
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2348 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2349 }; |
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2350 |
0 | 2351 void nmethod::verify() { |
2352 | |
2353 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2354 // seems odd. | |
2355 | |
2356 if( is_zombie() || is_not_entrant() ) | |
2357 return; | |
2358 | |
2359 // Make sure all the entry points are correctly aligned for patching. | |
2360 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2361 | |
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2362 // assert(method()->is_oop(), "must be valid"); |
0 | 2363 |
2364 ResourceMark rm; | |
2365 | |
2366 if (!CodeCache::contains(this)) { | |
1490
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2367 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2368 } |
2369 | |
2370 if(is_native_method() ) | |
2371 return; | |
2372 | |
2373 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2374 if (nm != this) { | |
1490
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2375 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2376 this)); |
0 | 2377 } |
2378 | |
2379 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2380 if (! p->verify(this)) { | |
2381 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2382 } | |
2383 } | |
2384 | |
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2385 VerifyOopsClosure voc(this); |
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2386 oops_do(&voc); |
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2387 assert(voc.ok(), "embedded oops must be OK"); |
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2388 verify_scavenge_root_oops(); |
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2389 |
0 | 2390 verify_scopes(); |
2391 } | |
2392 | |
2393 | |
2394 void nmethod::verify_interrupt_point(address call_site) { | |
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2395 // Verify IC only when nmethod installation is finished. |
13441 | 2396 bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed |
2397 || !this->is_in_use(); // nmethod is installed, but not in 'in_use' state | |
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2398 if (is_installed) { |
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|
2399 Thread *cur = Thread::current(); |
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2400 if (CompiledIC_lock->owner() == cur || |
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|
2401 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
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2402 SafepointSynchronize::is_at_safepoint())) { |
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2403 CompiledIC_at(this, call_site); |
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2404 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
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|
2405 } else { |
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2406 MutexLocker ml_verify (CompiledIC_lock); |
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2407 CompiledIC_at(this, call_site); |
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2408 } |
0 | 2409 } |
13071
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2410 |
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|
2411 PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address()); |
0 | 2412 assert(pd != NULL, "PcDesc must exist"); |
2413 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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diff
changeset
|
2414 pd->obj_decode_offset(), pd->should_reexecute(), |
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2415 pd->return_oop()); |
0 | 2416 !sd->is_top(); sd = sd->sender()) { |
2417 sd->verify(); | |
2418 } | |
2419 } | |
2420 | |
2421 void nmethod::verify_scopes() { | |
2422 if( !method() ) return; // Runtime stubs have no scope | |
2423 if (method()->is_native()) return; // Ignore stub methods. | |
2424 // iterate through all interrupt point | |
2425 // and verify the debug information is valid. | |
2426 RelocIterator iter((nmethod*)this); | |
2427 while (iter.next()) { | |
2428 address stub = NULL; | |
2429 switch (iter.type()) { | |
2430 case relocInfo::virtual_call_type: | |
2431 verify_interrupt_point(iter.addr()); | |
2432 break; | |
2433 case relocInfo::opt_virtual_call_type: | |
2434 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2435 verify_interrupt_point(iter.addr()); | |
2436 break; | |
2437 case relocInfo::static_call_type: | |
2438 stub = iter.static_call_reloc()->static_stub(); | |
2439 //verify_interrupt_point(iter.addr()); | |
2440 break; | |
2441 case relocInfo::runtime_call_type: | |
2442 address destination = iter.reloc()->value(); | |
2443 // Right now there is no way to find out which entries support | |
2444 // an interrupt point. It would be nice if we had this | |
2445 // information in a table. | |
2446 break; | |
2447 } | |
2448 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2449 } | |
2450 } | |
2451 | |
2452 | |
2453 // ----------------------------------------------------------------------------- | |
2454 // Non-product code | |
2455 #ifndef PRODUCT | |
2456 | |
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2457 class DebugScavengeRoot: public OopClosure { |
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2458 nmethod* _nm; |
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2459 bool _ok; |
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2460 public: |
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2461 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2462 bool ok() { return _ok; } |
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2463 virtual void do_oop(oop* p) { |
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|
2464 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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|
2465 if (_ok) { |
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|
2466 _nm->print_nmethod(true); |
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|
2467 _ok = false; |
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|
2468 } |
3377
2aa9ddbb9e60
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2405
diff
changeset
|
2469 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
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|
2470 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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diff
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|
2471 (*p)->print(); |
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|
2472 } |
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|
2473 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2474 }; |
0 | 2475 |
989
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2476 void nmethod::verify_scavenge_root_oops() { |
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|
2477 if (!on_scavenge_root_list()) { |
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2478 // Actually look inside, to verify the claim that it's clean. |
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2479 DebugScavengeRoot debug_scavenge_root(this); |
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2480 oops_do(&debug_scavenge_root); |
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2481 if (!debug_scavenge_root.ok()) |
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diff
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2482 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2483 } |
989
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2484 assert(scavenge_root_not_marked(), ""); |
0 | 2485 } |
2486 | |
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2487 #endif // PRODUCT |
0 | 2488 |
2489 // Printing operations | |
2490 | |
2491 void nmethod::print() const { | |
2492 ResourceMark rm; | |
2493 ttyLocker ttyl; // keep the following output all in one block | |
2494 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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diff
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|
2495 tty->print("Compiled method "); |
0 | 2496 |
2497 if (is_compiled_by_c1()) { | |
2498 tty->print("(c1) "); | |
2499 } else if (is_compiled_by_c2()) { | |
2500 tty->print("(c2) "); | |
1692 | 2501 } else if (is_compiled_by_shark()) { |
2502 tty->print("(shark) "); | |
0 | 2503 } else { |
2504 tty->print("(nm) "); | |
2505 } | |
2506 | |
2405
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diff
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|
2507 print_on(tty, NULL); |
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|
2508 |
0 | 2509 if (WizardMode) { |
2510 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2511 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2512 tty->print(" { "); | |
2513 if (is_in_use()) tty->print("in_use "); | |
2514 if (is_not_entrant()) tty->print("not_entrant "); | |
2515 if (is_zombie()) tty->print("zombie "); | |
2516 if (is_unloaded()) tty->print("unloaded "); | |
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|
2517 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2518 tty->print_cr("}:"); |
2519 } | |
2520 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2521 (address)this, | |
2522 (address)this + size(), | |
2523 size()); | |
2524 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2525 relocation_begin(), | |
2526 relocation_end(), | |
2527 relocation_size()); | |
1762
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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1748
diff
changeset
|
2528 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
|
2529 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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1748
diff
changeset
|
2530 consts_end(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
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diff
changeset
|
2531 consts_size()); |
1748 | 2532 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2533 insts_begin(), | |
2534 insts_end(), | |
2535 insts_size()); | |
0 | 2536 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2537 stub_begin(), | |
2538 stub_end(), | |
2539 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
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1538
diff
changeset
|
2540 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
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1538
diff
changeset
|
2541 oops_begin(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
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diff
changeset
|
2542 oops_end(), |
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|
2543 oops_size()); |
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2544 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2545 metadata_begin(), |
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|
2546 metadata_end(), |
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|
2547 metadata_size()); |
0 | 2548 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2549 scopes_data_begin(), | |
2550 scopes_data_end(), | |
2551 scopes_data_size()); | |
2552 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2553 scopes_pcs_begin(), | |
2554 scopes_pcs_end(), | |
2555 scopes_pcs_size()); | |
2556 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2557 dependencies_begin(), | |
2558 dependencies_end(), | |
2559 dependencies_size()); | |
2560 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2561 handler_table_begin(), | |
2562 handler_table_end(), | |
2563 handler_table_size()); | |
2564 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2565 nul_chk_table_begin(), | |
2566 nul_chk_table_end(), | |
2567 nul_chk_table_size()); | |
2568 } | |
2569 | |
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|
2570 void nmethod::print_code() { |
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|
2571 HandleMark hm; |
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changeset
|
2572 ResourceMark m; |
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diff
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|
2573 Disassembler::decode(this); |
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diff
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|
2574 } |
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|
2575 |
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|
2576 |
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|
2577 #ifndef PRODUCT |
0 | 2578 |
2579 void nmethod::print_scopes() { | |
2580 // Find the first pc desc for all scopes in the code and print it. | |
2581 ResourceMark rm; | |
2582 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2583 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2584 continue; | |
2585 | |
2586 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2587 sd->print_on(tty, p); | |
2588 } | |
2589 } | |
2590 | |
2591 void nmethod::print_dependencies() { | |
2592 ResourceMark rm; | |
2593 ttyLocker ttyl; // keep the following output all in one block | |
2594 tty->print_cr("Dependencies:"); | |
2595 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2596 deps.print_dependency(); | |
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2597 Klass* ctxk = deps.context_type(); |
0 | 2598 if (ctxk != NULL) { |
6983 | 2599 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { |
2600 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
0 | 2601 } |
2602 } | |
2603 deps.log_dependency(); // put it into the xml log also | |
2604 } | |
2605 } | |
2606 | |
2607 | |
2608 void nmethod::print_relocations() { | |
2609 ResourceMark m; // in case methods get printed via the debugger | |
2610 tty->print_cr("relocations:"); | |
2611 RelocIterator iter(this); | |
2612 iter.print(); | |
2613 if (UseRelocIndex) { | |
2614 jint* index_end = (jint*)relocation_end() - 1; | |
2615 jint index_size = *index_end; | |
2616 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2617 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2618 if (index_size > 0) { | |
2619 jint* ip; | |
2620 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2621 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2622 ip[0], | |
2623 ip[1], | |
2624 header_end()+ip[0], | |
2625 relocation_begin()-1+ip[1]); | |
2626 for (; ip < index_end; ip++) | |
2627 tty->print_cr(" (%d ?)", ip[0]); | |
10973
ef57c43512d6
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
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changeset
|
2628 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip); |
ef57c43512d6
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ccheung
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|
2629 ip++; |
0 | 2630 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
2631 } | |
2632 } | |
2633 } | |
2634 | |
2635 | |
2636 void nmethod::print_pcs() { | |
2637 ResourceMark m; // in case methods get printed via debugger | |
2638 tty->print_cr("pc-bytecode offsets:"); | |
2639 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2640 p->print(this); | |
2641 } | |
2642 } | |
2643 | |
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2644 #endif // PRODUCT |
0 | 2645 |
2646 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2647 RelocIterator iter(this, begin, end); | |
2648 bool have_one = false; | |
2649 while (iter.next()) { | |
2650 have_one = true; | |
2651 switch (iter.type()) { | |
2652 case relocInfo::none: return "no_reloc"; | |
2653 case relocInfo::oop_type: { | |
2654 stringStream st; | |
2655 oop_Relocation* r = iter.oop_reloc(); | |
2656 oop obj = r->oop_value(); | |
2657 st.print("oop("); | |
2658 if (obj == NULL) st.print("NULL"); | |
2659 else obj->print_value_on(&st); | |
2660 st.print(")"); | |
2661 return st.as_string(); | |
2662 } | |
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2663 case relocInfo::metadata_type: { |
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|
2664 stringStream st; |
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|
2665 metadata_Relocation* r = iter.metadata_reloc(); |
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|
2666 Metadata* obj = r->metadata_value(); |
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|
2667 st.print("metadata("); |
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changeset
|
2668 if (obj == NULL) st.print("NULL"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6266
diff
changeset
|
2669 else obj->print_value_on(&st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2670 st.print(")"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2671 return st.as_string(); |
da91efe96a93
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6266
diff
changeset
|
2672 } |
0 | 2673 case relocInfo::virtual_call_type: return "virtual_call"; |
2674 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2675 case relocInfo::static_call_type: return "static_call"; | |
2676 case relocInfo::static_stub_type: return "static_stub"; | |
2677 case relocInfo::runtime_call_type: return "runtime_call"; | |
2678 case relocInfo::external_word_type: return "external_word"; | |
2679 case relocInfo::internal_word_type: return "internal_word"; | |
2680 case relocInfo::section_word_type: return "section_word"; | |
2681 case relocInfo::poll_type: return "poll"; | |
2682 case relocInfo::poll_return_type: return "poll_return"; | |
2683 case relocInfo::type_mask: return "type_bit_mask"; | |
2684 } | |
2685 } | |
2686 return have_one ? "other" : NULL; | |
2687 } | |
2688 | |
2689 // Return a the last scope in (begin..end] | |
2690 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2691 PcDesc* p = pc_desc_near(begin+1); | |
2692 if (p != NULL && p->real_pc(this) <= end) { | |
2693 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2694 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
|
2695 p->return_oop()); |
0 | 2696 } |
2697 return NULL; | |
2698 } | |
2699 | |
6796
b31471cdc53e
7200163: add CodeComments functionality to assember stubs
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parents:
6792
diff
changeset
|
2700 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
|
2701 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
jrose
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diff
changeset
|
2702 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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changeset
|
2703 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
|
2704 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2705 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2706 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2707 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2708 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
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diff
changeset
|
2709 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2710 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2711 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2712 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2713 methodHandle m = method(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2714 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2715 stream->print(" # "); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2716 m->print_value_on(stream); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2717 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2718 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2719 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2720 ResourceMark rm; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2721 int sizeargs = m->size_of_parameters(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2722 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
|
2723 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
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diff
changeset
|
2724 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2725 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2726 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2727 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2728 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
|
2729 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2730 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2731 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2732 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2733 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2734 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
|
2735 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2736 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2737 assert(sig_index == 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 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2740 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
|
2741 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
|
2742 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2743 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2744 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
|
2745 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2746 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
|
2747 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2748 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2749 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
|
2750 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
|
2751 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2752 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2753 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2754 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2755 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2756 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2757 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2758 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2759 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2760 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2761 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2762 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2763 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2764 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
|
2765 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
|
2766 stream->print("[%s+0x%x]", spname, offset); |
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("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
|
2769 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2770 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2771 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2772 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2773 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2774 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2775 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2776 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2777 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2778 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
|
2779 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2780 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2781 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2782 } |
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 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2785 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2786 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2787 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2788 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2789 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2790 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2791 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2792 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2793 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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parents:
1141
diff
changeset
|
2794 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2795 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2796 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2797 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2798 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2799 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2800 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2801 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2802 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2803 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2804 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2805 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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|
2806 |
0 | 2807 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2808 // First, find an oopmap in (begin, end]. | |
2809 // We use the odd half-closed interval so that oop maps and scope descs | |
2810 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2811 address base = code_begin(); |
0 | 2812 OopMapSet* oms = oop_maps(); |
2813 if (oms != NULL) { | |
2814 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2815 OopMap* om = oms->at(i); | |
2816 address pc = base + om->offset(); | |
2817 if (pc > begin) { | |
2818 if (pc <= end) { | |
100
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2819 st->move_to(column); |
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2820 st->print("; "); |
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2821 om->print_on(st); |
0 | 2822 } |
2823 break; | |
2824 } | |
2825 } | |
2826 } | |
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2827 |
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2828 // Print any debug info present at this pc. |
0 | 2829 ScopeDesc* sd = scope_desc_in(begin, end); |
2830 if (sd != NULL) { | |
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2831 st->move_to(column); |
0 | 2832 if (sd->bci() == SynchronizationEntryBCI) { |
2833 st->print(";*synchronization entry"); | |
2834 } else { | |
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2835 if (sd->method() == NULL) { |
100
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2836 st->print("method is NULL"); |
0 | 2837 } else if (sd->method()->is_native()) { |
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2838 st->print("method is native"); |
0 | 2839 } else { |
2142 | 2840 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2841 st->print(";*%s", Bytecodes::name(bc)); |
2842 switch (bc) { | |
2843 case Bytecodes::_invokevirtual: | |
2844 case Bytecodes::_invokespecial: | |
2845 case Bytecodes::_invokestatic: | |
2846 case Bytecodes::_invokeinterface: | |
2847 { | |
2142 | 2848 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2849 st->print(" "); |
2142 | 2850 if (invoke.name() != NULL) |
2851 invoke.name()->print_symbol_on(st); | |
0 | 2852 else |
2853 st->print("<UNKNOWN>"); | |
2854 break; | |
2855 } | |
2856 case Bytecodes::_getfield: | |
2857 case Bytecodes::_putfield: | |
2858 case Bytecodes::_getstatic: | |
2859 case Bytecodes::_putstatic: | |
2860 { | |
2142 | 2861 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2862 st->print(" "); |
2142 | 2863 if (field.name() != NULL) |
2864 field.name()->print_symbol_on(st); | |
0 | 2865 else |
2866 st->print("<UNKNOWN>"); | |
2867 } | |
2868 } | |
2869 } | |
2870 } | |
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2871 |
0 | 2872 // Print all scopes |
2873 for (;sd != NULL; sd = sd->sender()) { | |
100
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2874 st->move_to(column); |
0 | 2875 st->print("; -"); |
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2876 if (sd->method() == NULL) { |
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2877 st->print("method is NULL"); |
0 | 2878 } else { |
2879 sd->method()->print_short_name(st); | |
2880 } | |
2881 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2882 if (lineno != -1) { | |
2883 st->print("@%d (line %d)", sd->bci(), lineno); | |
2884 } else { | |
2885 st->print("@%d", sd->bci()); | |
2886 } | |
2887 st->cr(); | |
2888 } | |
2889 } | |
2890 | |
2891 // Print relocation information | |
2892 const char* str = reloc_string_for(begin, end); | |
2893 if (str != NULL) { | |
2894 if (sd != NULL) st->cr(); | |
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2895 st->move_to(column); |
0 | 2896 st->print("; {%s}", str); |
2897 } | |
1748 | 2898 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2899 if (cont_offset != 0) { |
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2900 st->move_to(column); |
1748 | 2901 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2902 } |
2903 | |
2904 } | |
2905 | |
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2906 #ifndef PRODUCT |
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2907 |
0 | 2908 void nmethod::print_value_on(outputStream* st) const { |
2405
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2909 st->print("nmethod"); |
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2910 print_on(st, NULL); |
0 | 2911 } |
2912 | |
2913 void nmethod::print_calls(outputStream* st) { | |
2914 RelocIterator iter(this); | |
2915 while (iter.next()) { | |
2916 switch (iter.type()) { | |
2917 case relocInfo::virtual_call_type: | |
2918 case relocInfo::opt_virtual_call_type: { | |
2919 VerifyMutexLocker mc(CompiledIC_lock); | |
2920 CompiledIC_at(iter.reloc())->print(); | |
2921 break; | |
2922 } | |
2923 case relocInfo::static_call_type: | |
2924 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2925 compiledStaticCall_at(iter.reloc())->print(); | |
2926 break; | |
2927 } | |
2928 } | |
2929 } | |
2930 | |
2931 void nmethod::print_handler_table() { | |
2932 ExceptionHandlerTable(this).print(); | |
2933 } | |
2934 | |
2935 void nmethod::print_nul_chk_table() { | |
1748 | 2936 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2937 } |
2938 | |
2939 void nmethod::print_statistics() { | |
2940 ttyLocker ttyl; | |
2941 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2942 nmethod_stats.print_native_nmethod_stats(); | |
2943 nmethod_stats.print_nmethod_stats(); | |
2944 DebugInformationRecorder::print_statistics(); | |
2945 nmethod_stats.print_pc_stats(); | |
2946 Dependencies::print_statistics(); | |
2947 if (xtty != NULL) xtty->tail("statistics"); | |
2948 } | |
2949 | |
2950 #endif // PRODUCT |