Mercurial > hg > graal-compiler
annotate src/share/vm/code/nmethod.cpp @ 20278:2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com
author | stefank |
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date | Mon, 07 Jul 2014 10:12:40 +0200 |
parents | 882004b9e7e1 |
children | b12a2a9b05ca |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
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28 #include "code/dependencies.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
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32 #include "compiler/compileBroker.hpp" |
1972 | 33 #include "compiler/compileLog.hpp" |
34 #include "compiler/compilerOracle.hpp" | |
35 #include "compiler/disassembler.hpp" | |
36 #include "interpreter/bytecode.hpp" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
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40 #include "runtime/orderAccess.inline.hpp" |
1972 | 41 #include "runtime/sharedRuntime.hpp" |
42 #include "runtime/sweeper.hpp" | |
43 #include "utilities/dtrace.hpp" | |
44 #include "utilities/events.hpp" | |
45 #include "utilities/xmlstream.hpp" | |
46 #ifdef SHARK | |
47 #include "shark/sharkCompiler.hpp" | |
48 #endif | |
0 | 49 |
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50 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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51 |
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52 unsigned char nmethod::_global_unloading_clock = 0; |
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53 |
0 | 54 #ifdef DTRACE_ENABLED |
55 | |
56 // Only bother with this argument setup if dtrace is available | |
57 | |
4006 | 58 #ifndef USDT2 |
0 | 59 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
60 const char*, int, const char*, int, const char*, int, void*, size_t); | |
61 | |
62 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
63 char*, int, char*, int, char*, int); | |
64 | |
65 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
66 { \ | |
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67 Method* m = (method); \ |
0 | 68 if (m != NULL) { \ |
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69 Symbol* klass_name = m->klass_name(); \ |
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70 Symbol* name = m->name(); \ |
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71 Symbol* signature = m->signature(); \ |
0 | 72 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
73 klass_name->bytes(), klass_name->utf8_length(), \ | |
74 name->bytes(), name->utf8_length(), \ | |
75 signature->bytes(), signature->utf8_length()); \ | |
76 } \ | |
77 } | |
4006 | 78 #else /* USDT2 */ |
79 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
80 { \ | |
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81 Method* m = (method); \ |
4006 | 82 if (m != NULL) { \ |
83 Symbol* klass_name = m->klass_name(); \ | |
84 Symbol* name = m->name(); \ | |
85 Symbol* signature = m->signature(); \ | |
86 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
87 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
88 (char *) name->bytes(), name->utf8_length(), \ | |
89 (char *) signature->bytes(), signature->utf8_length()); \ | |
90 } \ | |
91 } | |
92 #endif /* USDT2 */ | |
0 | 93 |
94 #else // ndef DTRACE_ENABLED | |
95 | |
96 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
97 | |
98 #endif | |
99 | |
100 bool nmethod::is_compiled_by_c1() const { | |
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101 if (compiler() == NULL) { |
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102 return false; |
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103 } |
0 | 104 return compiler()->is_c1(); |
105 } | |
106 bool nmethod::is_compiled_by_c2() const { | |
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107 if (compiler() == NULL) { |
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108 return false; |
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109 } |
0 | 110 return compiler()->is_c2(); |
111 } | |
1692 | 112 bool nmethod::is_compiled_by_shark() const { |
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113 if (compiler() == NULL) { |
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114 return false; |
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115 } |
1692 | 116 return compiler()->is_shark(); |
117 } | |
0 | 118 |
119 | |
120 | |
121 //--------------------------------------------------------------------------------- | |
122 // NMethod statistics | |
123 // They are printed under various flags, including: | |
124 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
125 // (In the latter two cases, they like other stats are printed to the log only.) | |
126 | |
127 #ifndef PRODUCT | |
128 // These variables are put into one block to reduce relocations | |
129 // and make it simpler to print from the debugger. | |
130 static | |
131 struct nmethod_stats_struct { | |
132 int nmethod_count; | |
133 int total_size; | |
134 int relocation_size; | |
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135 int consts_size; |
1748 | 136 int insts_size; |
0 | 137 int stub_size; |
138 int scopes_data_size; | |
139 int scopes_pcs_size; | |
140 int dependencies_size; | |
141 int handler_table_size; | |
142 int nul_chk_table_size; | |
143 int oops_size; | |
144 | |
145 void note_nmethod(nmethod* nm) { | |
146 nmethod_count += 1; | |
147 total_size += nm->size(); | |
148 relocation_size += nm->relocation_size(); | |
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149 consts_size += nm->consts_size(); |
1748 | 150 insts_size += nm->insts_size(); |
0 | 151 stub_size += nm->stub_size(); |
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152 oops_size += nm->oops_size(); |
0 | 153 scopes_data_size += nm->scopes_data_size(); |
154 scopes_pcs_size += nm->scopes_pcs_size(); | |
155 dependencies_size += nm->dependencies_size(); | |
156 handler_table_size += nm->handler_table_size(); | |
157 nul_chk_table_size += nm->nul_chk_table_size(); | |
158 } | |
159 void print_nmethod_stats() { | |
160 if (nmethod_count == 0) return; | |
161 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
162 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
163 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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164 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 165 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 166 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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167 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 168 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
169 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
170 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
171 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
172 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
173 } | |
174 | |
175 int native_nmethod_count; | |
176 int native_total_size; | |
177 int native_relocation_size; | |
1748 | 178 int native_insts_size; |
0 | 179 int native_oops_size; |
180 void note_native_nmethod(nmethod* nm) { | |
181 native_nmethod_count += 1; | |
182 native_total_size += nm->size(); | |
183 native_relocation_size += nm->relocation_size(); | |
1748 | 184 native_insts_size += nm->insts_size(); |
0 | 185 native_oops_size += nm->oops_size(); |
186 } | |
187 void print_native_nmethod_stats() { | |
188 if (native_nmethod_count == 0) return; | |
189 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
190 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
191 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 192 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 193 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
194 } | |
195 | |
196 int pc_desc_resets; // number of resets (= number of caches) | |
197 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
198 int pc_desc_approx; // number of those which have approximate true | |
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199 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 200 int pc_desc_hits; // number of LRU cache hits |
201 int pc_desc_tests; // total number of PcDesc examinations | |
202 int pc_desc_searches; // total number of quasi-binary search steps | |
203 int pc_desc_adds; // number of LUR cache insertions | |
204 | |
205 void print_pc_stats() { | |
206 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
207 pc_desc_queries, | |
208 (double)(pc_desc_tests + pc_desc_searches) | |
209 / pc_desc_queries); | |
210 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
211 pc_desc_resets, | |
212 pc_desc_queries, pc_desc_approx, | |
213 pc_desc_repeats, pc_desc_hits, | |
214 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
215 } | |
216 } nmethod_stats; | |
217 #endif //PRODUCT | |
218 | |
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219 |
0 | 220 //--------------------------------------------------------------------------------- |
221 | |
222 | |
223 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
224 assert(pc != NULL, "Must be non null"); | |
225 assert(exception.not_null(), "Must be non null"); | |
226 assert(handler != NULL, "Must be non null"); | |
227 | |
228 _count = 0; | |
229 _exception_type = exception->klass(); | |
230 _next = NULL; | |
231 | |
232 add_address_and_handler(pc,handler); | |
233 } | |
234 | |
235 | |
236 address ExceptionCache::match(Handle exception, address pc) { | |
237 assert(pc != NULL,"Must be non null"); | |
238 assert(exception.not_null(),"Must be non null"); | |
239 if (exception->klass() == exception_type()) { | |
240 return (test_address(pc)); | |
241 } | |
242 | |
243 return NULL; | |
244 } | |
245 | |
246 | |
247 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
248 assert(exception.not_null(),"Must be non null"); | |
249 if (exception->klass() == exception_type() && count() < cache_size) { | |
250 return true; | |
251 } | |
252 return false; | |
253 } | |
254 | |
255 | |
256 address ExceptionCache::test_address(address addr) { | |
257 for (int i=0; i<count(); i++) { | |
258 if (pc_at(i) == addr) { | |
259 return handler_at(i); | |
260 } | |
261 } | |
262 return NULL; | |
263 } | |
264 | |
265 | |
266 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
267 if (test_address(addr) == handler) return true; | |
268 if (count() < cache_size) { | |
269 set_pc_at(count(),addr); | |
270 set_handler_at(count(), handler); | |
271 increment_count(); | |
272 return true; | |
273 } | |
274 return false; | |
275 } | |
276 | |
277 | |
278 // private method for handling exception cache | |
279 // These methods are private, and used to manipulate the exception cache | |
280 // directly. | |
281 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
282 ExceptionCache* ec = exception_cache(); | |
283 while (ec != NULL) { | |
284 if (ec->match_exception_with_space(exception)) { | |
285 return ec; | |
286 } | |
287 ec = ec->next(); | |
288 } | |
289 return NULL; | |
290 } | |
291 | |
292 | |
293 //----------------------------------------------------------------------------- | |
294 | |
295 | |
296 // Helper used by both find_pc_desc methods. | |
297 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
298 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
299 if (!approximate) | |
300 return pc->pc_offset() == pc_offset; | |
301 else | |
302 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
303 } | |
304 | |
305 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
306 if (initial_pc_desc == NULL) { | |
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307 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 308 return; |
309 } | |
310 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
311 // reset the cache by filling it with benign (non-null) values | |
312 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
313 for (int i = 0; i < cache_size; i++) | |
314 _pc_descs[i] = initial_pc_desc; | |
315 } | |
316 | |
317 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
318 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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319 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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320 |
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321 // Note: one might think that caching the most recently |
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322 // read value separately would be a win, but one would be |
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323 // wrong. When many threads are updating it, the cache |
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324 // line it's in would bounce between caches, negating |
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325 // any benefit. |
0 | 326 |
327 // In order to prevent race conditions do not load cache elements | |
328 // repeatedly, but use a local copy: | |
329 PcDesc* res; | |
330 | |
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331 // Step one: Check the most recently added value. |
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332 res = _pc_descs[0]; |
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333 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 334 if (match_desc(res, pc_offset, approximate)) { |
335 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
336 return res; | |
337 } | |
338 | |
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339 // Step two: Check the rest of the LRU cache. |
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340 for (int i = 1; i < cache_size; ++i) { |
0 | 341 res = _pc_descs[i]; |
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342 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 343 if (match_desc(res, pc_offset, approximate)) { |
344 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
345 return res; | |
346 } | |
347 } | |
348 | |
349 // Report failure. | |
350 return NULL; | |
351 } | |
352 | |
353 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
354 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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355 // Update the LRU cache by shifting pc_desc forward. |
0 | 356 for (int i = 0; i < cache_size; i++) { |
357 PcDesc* next = _pc_descs[i]; | |
358 _pc_descs[i] = pc_desc; | |
359 pc_desc = next; | |
360 } | |
361 } | |
362 | |
363 // adjust pcs_size so that it is a multiple of both oopSize and | |
364 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
365 // of oopSize, then 2*sizeof(PcDesc) is) | |
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366 static int adjust_pcs_size(int pcs_size) { |
0 | 367 int nsize = round_to(pcs_size, oopSize); |
368 if ((nsize % sizeof(PcDesc)) != 0) { | |
369 nsize = pcs_size + sizeof(PcDesc); | |
370 } | |
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371 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 372 return nsize; |
373 } | |
374 | |
375 //----------------------------------------------------------------------------- | |
376 | |
377 | |
378 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
379 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
380 assert(new_entry != NULL,"Must be non null"); | |
381 assert(new_entry->next() == NULL, "Must be null"); | |
382 | |
383 if (exception_cache() != NULL) { | |
384 new_entry->set_next(exception_cache()); | |
385 } | |
386 set_exception_cache(new_entry); | |
387 } | |
388 | |
20269 | 389 void nmethod::clean_exception_cache(BoolObjectClosure* is_alive) { |
0 | 390 ExceptionCache* prev = NULL; |
391 ExceptionCache* curr = exception_cache(); | |
20269 | 392 |
393 while (curr != NULL) { | |
394 ExceptionCache* next = curr->next(); | |
395 | |
396 Klass* ex_klass = curr->exception_type(); | |
397 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { | |
398 if (prev == NULL) { | |
399 set_exception_cache(next); | |
400 } else { | |
401 prev->set_next(next); | |
402 } | |
403 delete curr; | |
404 // prev stays the same. | |
405 } else { | |
406 prev = curr; | |
407 } | |
408 | |
409 curr = next; | |
0 | 410 } |
411 } | |
412 | |
413 // public method for accessing the exception cache | |
414 // These are the public access methods. | |
415 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
416 // We never grab a lock to read the exception cache, so we may | |
417 // have false negatives. This is okay, as it can only happen during | |
418 // the first few exception lookups for a given nmethod. | |
419 ExceptionCache* ec = exception_cache(); | |
420 while (ec != NULL) { | |
421 address ret_val; | |
422 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
423 return ret_val; | |
424 } | |
425 ec = ec->next(); | |
426 } | |
427 return NULL; | |
428 } | |
429 | |
430 | |
431 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
432 // There are potential race conditions during exception cache updates, so we | |
433 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 434 // we don't lock during reads, it is possible to have several threads attempt |
0 | 435 // to update the cache with the same data. We need to check for already inserted |
436 // copies of the current data before adding it. | |
437 | |
438 MutexLocker ml(ExceptionCache_lock); | |
439 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
440 | |
441 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
442 target_entry = new ExceptionCache(exception,pc,handler); | |
443 add_exception_cache_entry(target_entry); | |
444 } | |
445 } | |
446 | |
447 | |
448 //-------------end of code for ExceptionCache-------------- | |
449 | |
450 | |
451 int nmethod::total_size() const { | |
452 return | |
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453 consts_size() + |
1748 | 454 insts_size() + |
0 | 455 stub_size() + |
456 scopes_data_size() + | |
457 scopes_pcs_size() + | |
458 handler_table_size() + | |
459 nul_chk_table_size(); | |
460 } | |
461 | |
462 const char* nmethod::compile_kind() const { | |
463 if (is_osr_method()) return "osr"; | |
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464 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 465 return NULL; |
466 } | |
467 | |
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468 // Fill in default values for various flag fields |
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469 void nmethod::init_defaults() { |
13441 | 470 _state = in_use; |
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471 _unloading_clock = 0; |
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472 _marked_for_reclamation = 0; |
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473 _has_flushed_dependencies = 0; |
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474 _has_unsafe_access = 0; |
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475 _has_method_handle_invokes = 0; |
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476 _lazy_critical_native = 0; |
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477 _has_wide_vectors = 0; |
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478 _marked_for_deoptimization = 0; |
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479 _lock_count = 0; |
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480 _stack_traversal_mark = 0; |
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481 _unload_reported = false; // jvmti state |
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482 |
1726 | 483 #ifdef ASSERT |
484 _oops_are_stale = false; | |
485 #endif | |
486 | |
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487 _oops_do_mark_link = NULL; |
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488 _jmethod_id = NULL; |
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489 _osr_link = NULL; |
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490 if (UseG1GC) { |
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491 _unloading_next = NULL; |
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492 } else { |
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493 _scavenge_root_link = NULL; |
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494 } |
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495 _scavenge_root_state = 0; |
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496 _compiler = NULL; |
17780 | 497 #if INCLUDE_RTM_OPT |
498 _rtm_state = NoRTM; | |
499 #endif | |
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500 #ifdef HAVE_DTRACE_H |
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501 _trap_offset = 0; |
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502 #endif // def HAVE_DTRACE_H |
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503 } |
0 | 504 |
505 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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506 int compile_id, |
0 | 507 CodeBuffer *code_buffer, |
508 int vep_offset, | |
509 int frame_complete, | |
510 int frame_size, | |
511 ByteSize basic_lock_owner_sp_offset, | |
512 ByteSize basic_lock_sp_offset, | |
513 OopMapSet* oop_maps) { | |
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514 code_buffer->finalize_oop_references(method); |
0 | 515 // create nmethod |
516 nmethod* nm = NULL; | |
517 { | |
518 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
519 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
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520 CodeOffsets offsets; |
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521 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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522 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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523 nm = new (native_nmethod_size) nmethod(method(), native_nmethod_size, |
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524 compile_id, &offsets, |
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525 code_buffer, frame_size, |
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526 basic_lock_owner_sp_offset, |
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527 basic_lock_sp_offset, oop_maps); |
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528 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); |
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529 if (PrintAssembly && nm != NULL) { |
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530 Disassembler::decode(nm); |
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531 } |
0 | 532 } |
533 // verify nmethod | |
534 debug_only(if (nm) nm->verify();) // might block | |
535 | |
536 if (nm != NULL) { | |
537 nm->log_new_nmethod(); | |
538 } | |
539 | |
540 return nm; | |
541 } | |
542 | |
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543 #ifdef HAVE_DTRACE_H |
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544 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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545 CodeBuffer *code_buffer, |
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546 int vep_offset, |
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547 int trap_offset, |
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548 int frame_complete, |
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549 int frame_size) { |
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550 code_buffer->finalize_oop_references(method); |
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551 // create nmethod |
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552 nmethod* nm = NULL; |
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553 { |
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554 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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555 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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556 CodeOffsets offsets; |
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557 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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558 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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559 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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560 |
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561 nm = new (nmethod_size) nmethod(method(), nmethod_size, |
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562 &offsets, code_buffer, frame_size); |
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563 |
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564 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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565 if (PrintAssembly && nm != NULL) { |
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566 Disassembler::decode(nm); |
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567 } |
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568 } |
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569 // verify nmethod |
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570 debug_only(if (nm) nm->verify();) // might block |
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571 |
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572 if (nm != NULL) { |
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573 nm->log_new_nmethod(); |
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574 } |
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575 |
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576 return nm; |
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577 } |
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578 |
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579 #endif // def HAVE_DTRACE_H |
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580 |
0 | 581 nmethod* nmethod::new_nmethod(methodHandle method, |
582 int compile_id, | |
583 int entry_bci, | |
584 CodeOffsets* offsets, | |
585 int orig_pc_offset, | |
586 DebugInformationRecorder* debug_info, | |
587 Dependencies* dependencies, | |
588 CodeBuffer* code_buffer, int frame_size, | |
589 OopMapSet* oop_maps, | |
590 ExceptionHandlerTable* handler_table, | |
591 ImplicitExceptionTable* nul_chk_table, | |
592 AbstractCompiler* compiler, | |
593 int comp_level | |
594 ) | |
595 { | |
596 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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597 code_buffer->finalize_oop_references(method); |
0 | 598 // create nmethod |
599 nmethod* nm = NULL; | |
600 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
601 int nmethod_size = | |
602 allocation_size(code_buffer, sizeof(nmethod)) | |
603 + adjust_pcs_size(debug_info->pcs_size()) | |
604 + round_to(dependencies->size_in_bytes() , oopSize) | |
605 + round_to(handler_table->size_in_bytes(), oopSize) | |
606 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
607 + round_to(debug_info->data_size() , oopSize); | |
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608 |
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609 nm = new (nmethod_size) |
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610 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, |
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611 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, |
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612 oop_maps, |
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613 handler_table, |
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614 nul_chk_table, |
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615 compiler, |
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616 comp_level); |
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617 |
0 | 618 if (nm != NULL) { |
619 // To make dependency checking during class loading fast, record | |
620 // the nmethod dependencies in the classes it is dependent on. | |
621 // This allows the dependency checking code to simply walk the | |
622 // class hierarchy above the loaded class, checking only nmethods | |
623 // which are dependent on those classes. The slow way is to | |
624 // check every nmethod for dependencies which makes it linear in | |
625 // the number of methods compiled. For applications with a lot | |
626 // classes the slow way is too slow. | |
627 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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628 Klass* klass = deps.context_type(); |
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629 if (klass == NULL) { |
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630 continue; // ignore things like evol_method |
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631 } |
0 | 632 |
633 // record this nmethod as dependent on this klass | |
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634 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 635 } |
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636 NOT_PRODUCT(nmethod_stats.note_nmethod(nm)); |
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637 if (PrintAssembly || CompilerOracle::has_option_string(method, "PrintAssembly")) { |
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638 Disassembler::decode(nm); |
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639 } |
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640 } |
0 | 641 } |
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642 // Do verification and logging outside CodeCache_lock. |
0 | 643 if (nm != NULL) { |
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644 // Safepoints in nmethod::verify aren't allowed because nm hasn't been installed yet. |
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645 DEBUG_ONLY(nm->verify();) |
0 | 646 nm->log_new_nmethod(); |
647 } | |
648 return nm; | |
649 } | |
650 | |
651 | |
652 // For native wrappers | |
653 nmethod::nmethod( | |
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654 Method* method, |
0 | 655 int nmethod_size, |
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656 int compile_id, |
0 | 657 CodeOffsets* offsets, |
658 CodeBuffer* code_buffer, | |
659 int frame_size, | |
660 ByteSize basic_lock_owner_sp_offset, | |
661 ByteSize basic_lock_sp_offset, | |
662 OopMapSet* oop_maps ) | |
663 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
664 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 665 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
666 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 667 { |
668 { | |
669 debug_only(No_Safepoint_Verifier nsv;) | |
670 assert_locked_or_safepoint(CodeCache_lock); | |
671 | |
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672 init_defaults(); |
0 | 673 _method = method; |
674 _entry_bci = InvocationEntryBci; | |
675 // We have no exception handler or deopt handler make the | |
676 // values something that will never match a pc like the nmethod vtable entry | |
677 _exception_offset = 0; | |
678 _deoptimize_offset = 0; | |
1204 | 679 _deoptimize_mh_offset = 0; |
0 | 680 _orig_pc_offset = 0; |
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681 |
1748 | 682 _consts_offset = data_offset(); |
0 | 683 _stub_offset = data_offset(); |
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684 _oops_offset = data_offset(); |
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685 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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686 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 687 _scopes_pcs_offset = _scopes_data_offset; |
688 _dependencies_offset = _scopes_pcs_offset; | |
689 _handler_table_offset = _dependencies_offset; | |
690 _nul_chk_table_offset = _handler_table_offset; | |
691 _nmethod_end_offset = _nul_chk_table_offset; | |
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692 _compile_id = compile_id; |
0 | 693 _comp_level = CompLevel_none; |
1748 | 694 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
695 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 696 _osr_entry_point = NULL; |
697 _exception_cache = NULL; | |
698 _pc_desc_cache.reset_to(NULL); | |
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699 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
0 | 700 |
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701 code_buffer->copy_values_to(this); |
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702 if (ScavengeRootsInCode) { |
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703 if (detect_scavenge_root_oops()) { |
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704 CodeCache::add_scavenge_root_nmethod(this); |
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705 } |
12080 | 706 Universe::heap()->register_nmethod(this); |
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707 } |
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708 debug_only(verify_scavenge_root_oops()); |
0 | 709 CodeCache::commit(this); |
710 } | |
711 | |
712 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
713 ttyLocker ttyl; // keep the following output all in one block | |
714 // This output goes directly to the tty, not the compiler log. | |
715 // To enable tools to match it up with the compilation activity, | |
716 // be sure to tag this tty output with the compile ID. | |
717 if (xtty != NULL) { | |
718 xtty->begin_head("print_native_nmethod"); | |
719 xtty->method(_method); | |
720 xtty->stamp(); | |
721 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
722 } | |
723 // print the header part first | |
724 print(); | |
725 // then print the requested information | |
726 if (PrintNativeNMethods) { | |
727 print_code(); | |
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728 if (oop_maps != NULL) { |
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729 oop_maps->print(); |
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730 } |
0 | 731 } |
732 if (PrintRelocations) { | |
733 print_relocations(); | |
734 } | |
735 if (xtty != NULL) { | |
736 xtty->tail("print_native_nmethod"); | |
737 } | |
738 } | |
739 } | |
740 | |
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741 // For dtrace wrappers |
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742 #ifdef HAVE_DTRACE_H |
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743 nmethod::nmethod( |
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744 Method* method, |
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745 int nmethod_size, |
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746 CodeOffsets* offsets, |
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747 CodeBuffer* code_buffer, |
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748 int frame_size) |
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749 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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750 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 751 _native_receiver_sp_offset(in_ByteSize(-1)), |
752 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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753 { |
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754 { |
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755 debug_only(No_Safepoint_Verifier nsv;) |
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756 assert_locked_or_safepoint(CodeCache_lock); |
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757 |
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758 init_defaults(); |
116
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759 _method = method; |
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760 _entry_bci = InvocationEntryBci; |
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761 // We have no exception handler or deopt handler make the |
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762 // values something that will never match a pc like the nmethod vtable entry |
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763 _exception_offset = 0; |
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764 _deoptimize_offset = 0; |
1204 | 765 _deoptimize_mh_offset = 0; |
1378
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766 _unwind_handler_offset = -1; |
116
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767 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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768 _orig_pc_offset = 0; |
1748 | 769 _consts_offset = data_offset(); |
116
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770 _stub_offset = data_offset(); |
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771 _oops_offset = data_offset(); |
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772 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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773 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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774 _scopes_pcs_offset = _scopes_data_offset; |
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775 _dependencies_offset = _scopes_pcs_offset; |
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776 _handler_table_offset = _dependencies_offset; |
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777 _nul_chk_table_offset = _handler_table_offset; |
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778 _nmethod_end_offset = _nul_chk_table_offset; |
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779 _compile_id = 0; // default |
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780 _comp_level = CompLevel_none; |
1748 | 781 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
782 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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783 _osr_entry_point = NULL; |
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784 _exception_cache = NULL; |
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785 _pc_desc_cache.reset_to(NULL); |
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786 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
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787 |
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788 code_buffer->copy_values_to(this); |
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789 if (ScavengeRootsInCode) { |
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790 if (detect_scavenge_root_oops()) { |
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791 CodeCache::add_scavenge_root_nmethod(this); |
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792 } |
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793 Universe::heap()->register_nmethod(this); |
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794 } |
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795 DEBUG_ONLY(verify_scavenge_root_oops();) |
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796 CodeCache::commit(this); |
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797 } |
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798 |
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799 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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800 ttyLocker ttyl; // keep the following output all in one block |
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801 // This output goes directly to the tty, not the compiler log. |
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802 // To enable tools to match it up with the compilation activity, |
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803 // be sure to tag this tty output with the compile ID. |
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804 if (xtty != NULL) { |
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805 xtty->begin_head("print_dtrace_nmethod"); |
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806 xtty->method(_method); |
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807 xtty->stamp(); |
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808 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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809 } |
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810 // print the header part first |
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811 print(); |
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812 // then print the requested information |
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813 if (PrintNMethods) { |
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814 print_code(); |
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815 } |
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816 if (PrintRelocations) { |
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817 print_relocations(); |
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818 } |
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819 if (xtty != NULL) { |
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820 xtty->tail("print_dtrace_nmethod"); |
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821 } |
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822 } |
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823 } |
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824 #endif // def HAVE_DTRACE_H |
0 | 825 |
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826 void* nmethod::operator new(size_t size, int nmethod_size) throw() { |
10114
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827 // Not critical, may return null if there is too little continuous memory |
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828 return CodeCache::allocate(nmethod_size); |
0 | 829 } |
830 | |
831 nmethod::nmethod( | |
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832 Method* method, |
0 | 833 int nmethod_size, |
834 int compile_id, | |
835 int entry_bci, | |
836 CodeOffsets* offsets, | |
837 int orig_pc_offset, | |
838 DebugInformationRecorder* debug_info, | |
839 Dependencies* dependencies, | |
840 CodeBuffer *code_buffer, | |
841 int frame_size, | |
842 OopMapSet* oop_maps, | |
843 ExceptionHandlerTable* handler_table, | |
844 ImplicitExceptionTable* nul_chk_table, | |
845 AbstractCompiler* compiler, | |
846 int comp_level | |
847 ) | |
848 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
849 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 850 _native_receiver_sp_offset(in_ByteSize(-1)), |
851 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 852 { |
853 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
854 { | |
855 debug_only(No_Safepoint_Verifier nsv;) | |
856 assert_locked_or_safepoint(CodeCache_lock); | |
857 | |
1644
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858 init_defaults(); |
0 | 859 _method = method; |
1644
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860 _entry_bci = entry_bci; |
0 | 861 _compile_id = compile_id; |
862 _comp_level = comp_level; | |
863 _compiler = compiler; | |
864 _orig_pc_offset = orig_pc_offset; | |
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865 _hotness_counter = NMethodSweeper::hotness_counter_reset_val(); |
1748 | 866 |
867 // Section offsets | |
1762
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868 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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869 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 870 |
871 // Exception handler and deopt handler are in the stub section | |
2083
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872 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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873 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 874 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
875 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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876 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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877 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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878 } else { |
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879 _deoptimize_mh_offset = -1; |
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880 } |
1378
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881 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 882 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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883 } else { |
1748 | 884 _unwind_handler_offset = -1; |
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885 } |
1748 | 886 |
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887 _oops_offset = data_offset(); |
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888 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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889 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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890 |
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891 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 892 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
893 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
894 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
895 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
896 | |
1748 | 897 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
898 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
899 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 900 _exception_cache = NULL; |
901 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
902 | |
903 // Copy contents of ScopeDescRecorder to nmethod | |
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904 code_buffer->copy_values_to(this); |
0 | 905 debug_info->copy_to(this); |
906 dependencies->copy_to(this); | |
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907 if (ScavengeRootsInCode) { |
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908 if (detect_scavenge_root_oops()) { |
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909 CodeCache::add_scavenge_root_nmethod(this); |
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910 } |
12080 | 911 Universe::heap()->register_nmethod(this); |
989
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912 } |
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913 debug_only(verify_scavenge_root_oops()); |
0 | 914 |
915 CodeCache::commit(this); | |
916 | |
917 // Copy contents of ExceptionHandlerTable to nmethod | |
918 handler_table->copy_to(this); | |
919 nul_chk_table->copy_to(this); | |
920 | |
921 // we use the information of entry points to find out if a method is | |
922 // static or non static | |
923 assert(compiler->is_c2() || | |
924 _method->is_static() == (entry_point() == _verified_entry_point), | |
925 " entry points must be same for static methods and vice versa"); | |
926 } | |
927 | |
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928 bool printnmethods = PrintNMethods |
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929 || CompilerOracle::should_print(_method) |
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930 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 931 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
932 print_nmethod(printnmethods); | |
933 } | |
934 } | |
935 | |
936 | |
937 // Print a short set of xml attributes to identify this nmethod. The | |
938 // output should be embedded in some other element. | |
939 void nmethod::log_identity(xmlStream* log) const { | |
940 log->print(" compile_id='%d'", compile_id()); | |
941 const char* nm_kind = compile_kind(); | |
942 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
943 if (compiler() != NULL) { | |
944 log->print(" compiler='%s'", compiler()->name()); | |
945 } | |
1783 | 946 if (TieredCompilation) { |
947 log->print(" level='%d'", comp_level()); | |
948 } | |
0 | 949 } |
950 | |
951 | |
952 #define LOG_OFFSET(log, name) \ | |
953 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
954 log->print(" " XSTR(name) "_offset='%d'" , \ | |
955 (intptr_t)name##_begin() - (intptr_t)this) | |
956 | |
957 | |
958 void nmethod::log_new_nmethod() const { | |
959 if (LogCompilation && xtty != NULL) { | |
960 ttyLocker ttyl; | |
961 HandleMark hm; | |
962 xtty->begin_elem("nmethod"); | |
963 log_identity(xtty); | |
1748 | 964 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 965 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
966 | |
967 LOG_OFFSET(xtty, relocation); | |
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968 LOG_OFFSET(xtty, consts); |
1748 | 969 LOG_OFFSET(xtty, insts); |
0 | 970 LOG_OFFSET(xtty, stub); |
971 LOG_OFFSET(xtty, scopes_data); | |
972 LOG_OFFSET(xtty, scopes_pcs); | |
973 LOG_OFFSET(xtty, dependencies); | |
974 LOG_OFFSET(xtty, handler_table); | |
975 LOG_OFFSET(xtty, nul_chk_table); | |
976 LOG_OFFSET(xtty, oops); | |
977 | |
978 xtty->method(method()); | |
979 xtty->stamp(); | |
980 xtty->end_elem(); | |
981 } | |
982 } | |
983 | |
984 #undef LOG_OFFSET | |
985 | |
986 | |
987 // Print out more verbose output usually for a newly created nmethod. | |
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988 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 989 if (st != NULL) { |
990 ttyLocker ttyl; | |
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991 if (WizardMode) { |
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992 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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993 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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994 } else { |
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995 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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996 } |
0 | 997 } |
998 } | |
999 | |
1000 | |
1001 void nmethod::print_nmethod(bool printmethod) { | |
1002 ttyLocker ttyl; // keep the following output all in one block | |
1003 if (xtty != NULL) { | |
1004 xtty->begin_head("print_nmethod"); | |
1005 xtty->stamp(); | |
1006 xtty->end_head(); | |
1007 } | |
1008 // print the header part first | |
1009 print(); | |
1010 // then print the requested information | |
1011 if (printmethod) { | |
1012 print_code(); | |
1013 print_pcs(); | |
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1014 if (oop_maps()) { |
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1015 oop_maps()->print(); |
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1016 } |
0 | 1017 } |
1018 if (PrintDebugInfo) { | |
1019 print_scopes(); | |
1020 } | |
1021 if (PrintRelocations) { | |
1022 print_relocations(); | |
1023 } | |
1024 if (PrintDependencies) { | |
1025 print_dependencies(); | |
1026 } | |
1027 if (PrintExceptionHandlers) { | |
1028 print_handler_table(); | |
1029 print_nul_chk_table(); | |
1030 } | |
1031 if (xtty != NULL) { | |
1032 xtty->tail("print_nmethod"); | |
1033 } | |
1034 } | |
1035 | |
1036 | |
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1037 // Promote one word from an assembly-time handle to a live embedded oop. |
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1038 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1039 if (handle == NULL || |
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1040 // As a special case, IC oops are initialized to 1 or -1. |
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1041 handle == (jobject) Universe::non_oop_word()) { |
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1042 (*dest) = (oop) handle; |
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1043 } else { |
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1044 (*dest) = JNIHandles::resolve_non_null(handle); |
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1045 } |
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1046 } |
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1047 |
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1048 |
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1049 // Have to have the same name because it's called by a template |
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1050 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1051 int length = array->length(); |
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1052 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1053 oop* dest = oops_begin(); |
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1054 for (int index = 0 ; index < length; index++) { |
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1055 initialize_immediate_oop(&dest[index], array->at(index)); |
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1056 } |
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1057 |
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1058 // Now we can fix up all the oops in the code. We need to do this |
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1059 // in the code because the assembler uses jobjects as placeholders. |
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1060 // The code and relocations have already been initialized by the |
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1061 // CodeBlob constructor, so it is valid even at this early point to |
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1062 // iterate over relocations and patch the code. |
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1063 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1064 } |
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1065 |
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1066 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1067 int length = array->length(); |
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1068 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1069 Metadata** dest = metadata_begin(); |
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1070 for (int index = 0 ; index < length; index++) { |
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1071 dest[index] = array->at(index); |
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1072 } |
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1073 } |
1563
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1074 |
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1075 bool nmethod::is_at_poll_return(address pc) { |
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1076 RelocIterator iter(this, pc, pc+1); |
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1077 while (iter.next()) { |
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1078 if (iter.type() == relocInfo::poll_return_type) |
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1079 return true; |
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1080 } |
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1081 return false; |
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1082 } |
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1083 |
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1084 |
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1085 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1086 RelocIterator iter(this, pc, pc+1); |
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1087 while (iter.next()) { |
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1088 relocInfo::relocType t = iter.type(); |
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1089 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1090 return true; |
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1091 } |
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1092 return false; |
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1093 } |
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1094 |
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1095 |
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1096 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1097 // re-patch all oop-bearing instructions, just in case some oops moved |
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1098 RelocIterator iter(this, begin, end); |
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1099 while (iter.next()) { |
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1100 if (iter.type() == relocInfo::oop_type) { |
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1101 oop_Relocation* reloc = iter.oop_reloc(); |
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1102 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1103 oop* dest = reloc->oop_addr(); |
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1104 initialize_immediate_oop(dest, (jobject) *dest); |
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1105 } |
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1106 // Refresh the oop-related bits of this instruction. |
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1107 reloc->fix_oop_relocation(); |
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1108 } else if (iter.type() == relocInfo::metadata_type) { |
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1109 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1110 reloc->fix_metadata_relocation(); |
1563
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1111 } |
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1112 } |
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1113 } |
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1114 |
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1115 |
2375
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1116 void nmethod::verify_oop_relocations() { |
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1117 // Ensure sure that the code matches the current oop values |
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1118 RelocIterator iter(this, NULL, NULL); |
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1119 while (iter.next()) { |
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1120 if (iter.type() == relocInfo::oop_type) { |
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1121 oop_Relocation* reloc = iter.oop_reloc(); |
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1122 if (!reloc->oop_is_immediate()) { |
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1123 reloc->verify_oop_relocation(); |
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1124 } |
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1125 } |
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1126 } |
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1127 } |
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1128 |
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1129 |
0 | 1130 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1131 PcDesc* pd = pc_desc_at(pc); | |
1132 guarantee(pd != NULL, "scope must be present"); | |
1133 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1134 pd->obj_decode_offset(), pd->should_reexecute(), |
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1135 pd->return_oop()); |
0 | 1136 } |
1137 | |
1138 | |
1139 void nmethod::clear_inline_caches() { | |
1140 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1141 if (is_zombie()) { | |
1142 return; | |
1143 } | |
1144 | |
1145 RelocIterator iter(this); | |
1146 while (iter.next()) { | |
1147 iter.reloc()->clear_inline_cache(); | |
1148 } | |
1149 } | |
1150 | |
1151 | |
1152 void nmethod::cleanup_inline_caches() { | |
1153 | |
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1154 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1155 |
1156 // If the method is not entrant or zombie then a JMP is plastered over the | |
1157 // first few bytes. If an oop in the old code was there, that oop | |
1158 // should not get GC'd. Skip the first few bytes of oops on | |
1159 // not-entrant methods. | |
1160 address low_boundary = verified_entry_point(); | |
1161 if (!is_in_use()) { | |
1162 low_boundary += NativeJump::instruction_size; | |
1163 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1164 // This means that the low_boundary is going to be a little too high. | |
1165 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1166 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1167 } | |
1168 | |
1169 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1170 ResourceMark rm; | |
1171 RelocIterator iter(this, low_boundary); | |
1172 while(iter.next()) { | |
1173 switch(iter.type()) { | |
1174 case relocInfo::virtual_call_type: | |
1175 case relocInfo::opt_virtual_call_type: { | |
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1176 CompiledIC *ic = CompiledIC_at(&iter); |
0 | 1177 // Ok, to lookup references to zombies here |
1178 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1179 if( cb != NULL && cb->is_nmethod() ) { | |
1180 nmethod* nm = (nmethod*)cb; | |
1181 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1182 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1183 } |
1184 break; | |
1185 } | |
1186 case relocInfo::static_call_type: { | |
1187 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1188 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1189 if( cb != NULL && cb->is_nmethod() ) { | |
1190 nmethod* nm = (nmethod*)cb; | |
1191 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1192 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1193 } |
1194 break; | |
1195 } | |
1196 } | |
1197 } | |
1198 } | |
1199 | |
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1200 void nmethod::verify_clean_inline_caches() { |
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1201 assert_locked_or_safepoint(CompiledIC_lock); |
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1202 |
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1203 // If the method is not entrant or zombie then a JMP is plastered over the |
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1204 // first few bytes. If an oop in the old code was there, that oop |
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1205 // should not get GC'd. Skip the first few bytes of oops on |
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1206 // not-entrant methods. |
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1207 address low_boundary = verified_entry_point(); |
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1208 if (!is_in_use()) { |
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1209 low_boundary += NativeJump::instruction_size; |
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1210 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1211 // This means that the low_boundary is going to be a little too high. |
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1212 // This shouldn't matter, since oops of non-entrant methods are never used. |
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1213 // In fact, why are we bothering to look at oops in a non-entrant method?? |
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1214 } |
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1215 |
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1216 ResourceMark rm; |
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1217 RelocIterator iter(this, low_boundary); |
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1218 while(iter.next()) { |
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1219 switch(iter.type()) { |
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1220 case relocInfo::virtual_call_type: |
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1221 case relocInfo::opt_virtual_call_type: { |
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1222 CompiledIC *ic = CompiledIC_at(&iter); |
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1223 // Ok, to lookup references to zombies here |
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1224 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); |
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1225 if( cb != NULL && cb->is_nmethod() ) { |
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1226 nmethod* nm = (nmethod*)cb; |
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1227 // Verify that inline caches pointing to both zombie and not_entrant methods are clean |
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1228 if (!nm->is_in_use() || (nm->method()->code() != nm)) { |
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1229 assert(ic->is_clean(), "IC should be clean"); |
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1230 } |
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1231 } |
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|
1232 break; |
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1233 } |
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1234 case relocInfo::static_call_type: { |
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1235 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); |
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1236 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); |
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1237 if( cb != NULL && cb->is_nmethod() ) { |
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1238 nmethod* nm = (nmethod*)cb; |
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1239 // Verify that inline caches pointing to both zombie and not_entrant methods are clean |
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1240 if (!nm->is_in_use() || (nm->method()->code() != nm)) { |
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1241 assert(csc->is_clean(), "IC should be clean"); |
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1242 } |
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|
1243 } |
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|
1244 break; |
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|
1245 } |
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|
1246 } |
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|
1247 } |
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|
1248 } |
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|
1249 |
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1250 int nmethod::verify_icholder_relocations() { |
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1251 int count = 0; |
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|
1252 |
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1253 RelocIterator iter(this); |
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1254 while(iter.next()) { |
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1255 if (iter.type() == relocInfo::virtual_call_type) { |
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1256 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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1257 CompiledIC *ic = CompiledIC_at(&iter); |
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1258 if (TraceCompiledIC) { |
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1259 tty->print("noticed icholder " INTPTR_FORMAT " ", p2i(ic->cached_icholder())); |
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1260 ic->print(); |
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1261 } |
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1262 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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1263 count++; |
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|
1264 } |
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|
1265 } |
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|
1266 } |
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|
1267 |
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1268 return count; |
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|
1269 } |
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1270 |
989
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1271 // This is a private interface with the sweeper. |
0 | 1272 void nmethod::mark_as_seen_on_stack() { |
12324
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8020151: PSR:PERF Large performance regressions when code cache is filled
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1273 assert(is_alive(), "Must be an alive method"); |
1644
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1274 // Set the traversal mark to ensure that the sweeper does 2 |
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1275 // cleaning passes before moving to zombie. |
0 | 1276 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1277 } | |
1278 | |
2342
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1279 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1280 // there are no activations on the stack, not in use by the VM, |
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1281 // and not in use by the ServiceThread) |
0 | 1282 bool nmethod::can_not_entrant_be_converted() { |
1283 assert(is_not_entrant(), "must be a non-entrant method"); | |
1284 | |
1285 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1286 // count can be greater than the stack traversal count before it hits the | |
1287 // nmethod for the second time. | |
2342
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1288 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1289 !is_locked_by_vm(); |
0 | 1290 } |
1291 | |
1292 void nmethod::inc_decompile_count() { | |
1783 | 1293 if (!is_compiled_by_c2()) return; |
0 | 1294 // Could be gated by ProfileTraps, but do not bother... |
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1295 Method* m = method(); |
0 | 1296 if (m == NULL) return; |
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1297 MethodData* mdo = m->method_data(); |
0 | 1298 if (mdo == NULL) return; |
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1299 // There is a benign race here. See comments in methodData.hpp. |
0 | 1300 mdo->inc_decompile_count(); |
1301 } | |
1302 | |
20278
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1303 void nmethod::increase_unloading_clock() { |
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1304 _global_unloading_clock++; |
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|
1305 if (_global_unloading_clock == 0) { |
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1306 // _nmethods are allocated with _unloading_clock == 0, |
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1307 // so 0 is never used as a clock value. |
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1308 _global_unloading_clock = 1; |
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1309 } |
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|
1310 } |
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|
1311 |
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1312 void nmethod::set_unloading_clock(unsigned char unloading_clock) { |
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1313 OrderAccess::release_store((volatile jubyte*)&_unloading_clock, unloading_clock); |
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1314 } |
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|
1315 |
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1316 unsigned char nmethod::unloading_clock() { |
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1317 return (unsigned char)OrderAccess::load_acquire((volatile jubyte*)&_unloading_clock); |
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1318 } |
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1319 |
0 | 1320 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { |
1321 | |
1322 post_compiled_method_unload(); | |
1323 | |
1324 // Since this nmethod is being unloaded, make sure that dependencies | |
1325 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1326 // indicate that this work is being done during a GC. | |
1327 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1328 assert(is_alive != NULL, "Should be non-NULL"); | |
1329 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1330 flush_dependencies(is_alive); | |
1331 | |
1332 // Break cycle between nmethod & method | |
1333 if (TraceClassUnloading && WizardMode) { | |
1334 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
6725
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1335 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1336 "), cause(" INTPTR_FORMAT ")", |
1337 this, (address)_method, (address)cause); | |
989
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|
1338 if (!Universe::heap()->is_gc_active()) |
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1339 cause->klass()->print(); |
0 | 1340 } |
941 | 1341 // Unlink the osr method, so we do not look this up again |
1342 if (is_osr_method()) { | |
1343 invalidate_osr_method(); | |
1344 } | |
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1345 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1346 // so we don't have to break the cycle. Note that it is possible to |
6725
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1347 // have the Method* live here, in case we unload the nmethod because |
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1348 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1349 if (_method != NULL) { |
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1350 // OSR methods point to the Method*, but the Method* does not |
0 | 1351 // point back! |
1352 if (_method->code() == this) { | |
1353 _method->clear_code(); // Break a cycle | |
1354 } | |
1355 _method = NULL; // Clear the method of this dead nmethod | |
1356 } | |
1357 // Make the class unloaded - i.e., change state and notify sweeper | |
1538
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1358 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1359 if (is_in_use()) { |
1360 // Transitioning directly from live to unloaded -- so | |
1361 // we need to force a cache clean-up; remember this | |
1362 // for later on. | |
1363 CodeCache::set_needs_cache_clean(true); | |
1364 } | |
20278
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1365 |
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1366 // Unregister must be done before the state change |
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1367 Universe::heap()->unregister_nmethod(this); |
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1368 |
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1369 _state = unloaded; |
0 | 1370 |
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1371 // Log the unloading. |
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1372 log_state_change(); |
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1373 |
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1374 // The Method* is gone at this point |
0 | 1375 assert(_method == NULL, "Tautology"); |
1376 | |
989
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1377 set_osr_link(NULL); |
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1378 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
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1379 NMethodSweeper::report_state_change(this); |
0 | 1380 } |
1381 | |
1382 void nmethod::invalidate_osr_method() { | |
1383 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1384 // Remove from list of active nmethods | |
1385 if (method() != NULL) | |
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|
1386 method()->method_holder()->remove_osr_nmethod(this); |
0 | 1387 // Set entry as invalid |
1388 _entry_bci = InvalidOSREntryBci; | |
1389 } | |
1390 | |
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|
1391 void nmethod::log_state_change() const { |
0 | 1392 if (LogCompilation) { |
1393 if (xtty != NULL) { | |
1394 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1395 if (_state == unloaded) { |
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1396 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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|
1397 os::current_thread_id()); |
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|
1398 } else { |
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|
1399 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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|
1400 os::current_thread_id(), |
1644
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|
1401 (_state == zombie ? " zombie='1'" : "")); |
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|
1402 } |
0 | 1403 log_identity(xtty); |
1404 xtty->stamp(); | |
1405 xtty->end_elem(); | |
1406 } | |
1407 } | |
1644
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|
1408 if (PrintCompilation && _state != unloaded) { |
2405
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|
1409 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1410 } |
1411 } | |
1412 | |
13074
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|
1413 /** |
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|
1414 * Common functionality for both make_not_entrant and make_zombie |
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|
1415 */ |
1141 | 1416 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1417 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1418 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1419 |
1644
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|
1420 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1421 nmethodLocker nml(this); |
1644
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1422 methodHandle the_method(method()); |
1726 | 1423 No_Safepoint_Verifier nsv; |
0 | 1424 |
12080 | 1425 // during patching, depending on the nmethod state we must notify the GC that |
1426 // code has been unloaded, unregistering it. We cannot do this right while | |
1427 // holding the Patching_lock because we need to use the CodeCache_lock. This | |
1428 // would be prone to deadlocks. | |
1429 // This flag is used to remember whether we need to later lock and unregister. | |
1430 bool nmethod_needs_unregister = false; | |
1431 | |
0 | 1432 { |
1109
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1433 // invalidate osr nmethod before acquiring the patching lock since |
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1434 // they both acquire leaf locks and we don't want a deadlock. |
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1435 // This logic is equivalent to the logic below for patching the |
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|
1436 // verified entry point of regular methods. |
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1437 if (is_osr_method()) { |
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1438 // this effectively makes the osr nmethod not entrant |
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1439 invalidate_osr_method(); |
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1440 } |
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1441 |
0 | 1442 // Enter critical section. Does not block for safepoint. |
1443 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1444 |
1644
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1445 if (_state == state) { |
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1446 // another thread already performed this transition so nothing |
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1447 // to do, but return false to indicate this. |
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1448 return false; |
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1449 } |
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1450 |
0 | 1451 // The caller can be calling the method statically or through an inline |
1452 // cache call. | |
1109
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1453 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1454 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1455 SharedRuntime::get_handle_wrong_method_stub()); | |
1456 } | |
1457 | |
1644
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1458 if (is_in_use()) { |
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1459 // It's a true state change, so mark the method as decompiled. |
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1460 // Do it only for transition from alive. |
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1461 inc_decompile_count(); |
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1462 } |
1206
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1463 |
12080 | 1464 // If the state is becoming a zombie, signal to unregister the nmethod with |
1465 // the heap. | |
1466 // This nmethod may have already been unloaded during a full GC. | |
1467 if ((state == zombie) && !is_unloaded()) { | |
1468 nmethod_needs_unregister = true; | |
1469 } | |
1470 | |
12324
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1471 // Must happen before state change. Otherwise we have a race condition in |
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1472 // nmethod::can_not_entrant_be_converted(). I.e., a method can immediately |
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1473 // transition its state from 'not_entrant' to 'zombie' without having to wait |
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1474 // for stack scanning. |
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1475 if (state == not_entrant) { |
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1476 mark_as_seen_on_stack(); |
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|
1477 OrderAccess::storestore(); |
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|
1478 } |
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|
1479 |
0 | 1480 // Change state |
1644
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1481 _state = state; |
1109
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1482 |
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1483 // Log the transition once |
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1484 log_state_change(); |
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1485 |
1644
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1486 // Remove nmethod from method. |
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1487 // We need to check if both the _code and _from_compiled_code_entry_point |
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1488 // refer to this nmethod because there is a race in setting these two fields |
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1489 // in Method* as seen in bugid 4947125. |
1644
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1490 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1491 // could be flushed and the compiler and vtable stubs could still call |
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1492 // through it. |
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1493 if (method() != NULL && (method()->code() == this || |
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1494 method()->from_compiled_entry() == verified_entry_point())) { |
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1495 HandleMark hm; |
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|
1496 method()->clear_code(); |
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|
1497 } |
0 | 1498 } // leave critical region under Patching_lock |
1499 | |
1538
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1500 // When the nmethod becomes zombie it is no longer alive so the |
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1501 // dependencies must be flushed. nmethods in the not_entrant |
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1502 // state will be flushed later when the transition to zombie |
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1503 // happens or they get unloaded. |
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1504 if (state == zombie) { |
1726 | 1505 { |
1506 // Flushing dependecies must be done before any possible | |
1507 // safepoint can sneak in, otherwise the oops used by the | |
1508 // dependency logic could have become stale. | |
1509 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
12080 | 1510 if (nmethod_needs_unregister) { |
1511 Universe::heap()->unregister_nmethod(this); | |
1512 } | |
1726 | 1513 flush_dependencies(NULL); |
1514 } | |
1644
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1515 |
2342
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1516 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1517 // event and it hasn't already been reported for this nmethod then |
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|
1518 // report it now. The event may have been reported earilier if the GC |
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|
1519 // marked it for unloading). JvmtiDeferredEventQueue support means |
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|
1520 // we no longer go to a safepoint here. |
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|
1521 post_compiled_method_unload(); |
1726 | 1522 |
1523 #ifdef ASSERT | |
1524 // It's no longer safe to access the oops section since zombie | |
1525 // nmethods aren't scanned for GC. | |
1526 _oops_are_stale = true; | |
1527 #endif | |
12161
e1fbb86b47e4
8016277: Crash in nmethod::is_compiled_by_c1() on x86
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diff
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|
1528 // the Method may be reclaimed by class unloading now that the |
e1fbb86b47e4
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|
1529 // nmethod is in zombie state |
e1fbb86b47e4
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|
1530 set_method(NULL); |
1538
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|
1531 } else { |
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|
1532 assert(state == not_entrant, "other cases may need to be handled differently"); |
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|
1533 } |
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|
1534 |
0 | 1535 if (TraceCreateZombies) { |
1536 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1537 } | |
1538 | |
13074
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|
1539 NMethodSweeper::report_state_change(this); |
1109
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|
1540 return true; |
0 | 1541 } |
1542 | |
1543 void nmethod::flush() { | |
1544 // Note that there are no valid oops in the nmethod anymore. | |
1545 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1546 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1547 | |
1548 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1549 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1550 |
1551 // completely deallocate this method | |
4872
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|
1552 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1553 if (PrintMethodFlushing) { |
1202 | 1554 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1555 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1556 } |
1557 | |
1558 // We need to deallocate any ExceptionCache data. | |
1559 // Note that we do not need to grab the nmethod lock for this, it | |
1560 // better be thread safe if we're disposing of it! | |
1561 ExceptionCache* ec = exception_cache(); | |
1562 set_exception_cache(NULL); | |
1563 while(ec != NULL) { | |
1564 ExceptionCache* next = ec->next(); | |
1565 delete ec; | |
1566 ec = next; | |
1567 } | |
1568 | |
989
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1569 if (on_scavenge_root_list()) { |
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1570 CodeCache::drop_scavenge_root_nmethod(this); |
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1571 } |
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|
1572 |
1692 | 1573 #ifdef SHARK |
1845
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|
1574 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1575 #endif // SHARK |
1576 | |
0 | 1577 ((CodeBlob*)(this))->flush(); |
1578 | |
1579 CodeCache::free(this); | |
1580 } | |
1581 | |
1582 | |
1583 // | |
1584 // Notify all classes this nmethod is dependent on that it is no | |
1585 // longer dependent. This should only be called in two situations. | |
1586 // First, when a nmethod transitions to a zombie all dependents need | |
1587 // to be clear. Since zombification happens at a safepoint there's no | |
1588 // synchronization issues. The second place is a little more tricky. | |
1589 // During phase 1 of mark sweep class unloading may happen and as a | |
1590 // result some nmethods may get unloaded. In this case the flushing | |
1591 // of dependencies must happen during phase 1 since after GC any | |
1592 // dependencies in the unloaded nmethod won't be updated, so | |
1593 // traversing the dependency information in unsafe. In that case this | |
1594 // function is called with a non-NULL argument and this function only | |
1595 // notifies instanceKlasses that are reachable | |
1596 | |
1597 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1598 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1599 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1600 "is_alive is non-NULL if and only if we are called during GC"); | |
1601 if (!has_flushed_dependencies()) { | |
1602 set_has_flushed_dependencies(); | |
1603 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1604 Klass* klass = deps.context_type(); |
0 | 1605 if (klass == NULL) continue; // ignore things like evol_method |
1606 | |
1607 // During GC the is_alive closure is non-NULL, and is used to | |
1608 // determine liveness of dependees that need to be updated. | |
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1609 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1610 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1611 } |
1612 } | |
1613 } | |
1614 } | |
1615 | |
1616 | |
1617 // If this oop is not live, the nmethod can be unloaded. | |
6787
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|
1618 bool nmethod::can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred) { |
0 | 1619 assert(root != NULL, "just checking"); |
1620 oop obj = *root; | |
1621 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1622 return false; | |
1623 } | |
6725
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|
1624 |
989
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|
1625 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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|
1626 // simply because one of its constant oops has gone dead. |
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|
1627 // No actual classes need to be unloaded in order for this to occur. |
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|
1628 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1629 make_unloaded(is_alive, obj); |
1630 return true; | |
1631 } | |
1632 | |
1633 // ------------------------------------------------------------------ | |
1634 // post_compiled_method_load_event | |
1635 // new method for install_code() path | |
1636 // Transfer information from compilation to jvmti | |
1637 void nmethod::post_compiled_method_load_event() { | |
1638 | |
6725
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|
1639 Method* moop = method(); |
4006 | 1640 #ifndef USDT2 |
0 | 1641 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1642 moop->klass_name()->bytes(), | |
1643 moop->klass_name()->utf8_length(), | |
1644 moop->name()->bytes(), | |
1645 moop->name()->utf8_length(), | |
1646 moop->signature()->bytes(), | |
1647 moop->signature()->utf8_length(), | |
1748 | 1648 insts_begin(), insts_size()); |
4006 | 1649 #else /* USDT2 */ |
1650 HOTSPOT_COMPILED_METHOD_LOAD( | |
1651 (char *) moop->klass_name()->bytes(), | |
1652 moop->klass_name()->utf8_length(), | |
1653 (char *) moop->name()->bytes(), | |
1654 moop->name()->utf8_length(), | |
1655 (char *) moop->signature()->bytes(), | |
1656 moop->signature()->utf8_length(), | |
1657 insts_begin(), insts_size()); | |
1658 #endif /* USDT2 */ | |
0 | 1659 |
1616
38e8278318ca
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never
parents:
1602
diff
changeset
|
1660 if (JvmtiExport::should_post_compiled_method_load() || |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1661 JvmtiExport::should_post_compiled_method_unload()) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1662 get_and_cache_jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1663 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1664 |
0 | 1665 if (JvmtiExport::should_post_compiled_method_load()) { |
2195
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changeset
|
1666 // Let the Service thread (which is a real Java thread) post the event |
bf8517f4e4d0
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|
1667 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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|
1668 JvmtiDeferredEventQueue::enqueue( |
bf8517f4e4d0
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|
1669 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1670 } |
1671 } | |
1672 | |
1616
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never
parents:
1602
diff
changeset
|
1673 jmethodID nmethod::get_and_cache_jmethod_id() { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1674 if (_jmethod_id == NULL) { |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1675 // Cache the jmethod_id since it can no longer be looked up once the |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1676 // method itself has been marked for unloading. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
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diff
changeset
|
1677 _jmethod_id = method()->jmethod_id(); |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1678 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
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diff
changeset
|
1679 return _jmethod_id; |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1680 } |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
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diff
changeset
|
1681 |
0 | 1682 void nmethod::post_compiled_method_unload() { |
1577
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1683 if (unload_reported()) { |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1684 // During unloading we transition to unloaded and then to zombie |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1685 // and the unloading is reported during the first transition. |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1686 return; |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1687 } |
852d0157c696
6956931: assert(SafepointSynchronize::is_at_safepoint()) failed: must be executed at a safepoint
never
parents:
1563
diff
changeset
|
1688 |
0 | 1689 assert(_method != NULL && !is_unloaded(), "just checking"); |
1690 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1691 | |
1692 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
38e8278318ca
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parents:
1602
diff
changeset
|
1693 // post the event. Sometime later this nmethod will be made a zombie |
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1694 // by the sweeper but the Method* will not be valid at that point. |
1616
38e8278318ca
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never
parents:
1602
diff
changeset
|
1695 // If the _jmethod_id is null then no load event was ever requested |
38e8278318ca
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never
parents:
1602
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changeset
|
1696 // so don't bother posting the unload. The main reason for this is |
6725
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|
1697 // that the jmethodID is a weak reference to the Method* so if |
1616
38e8278318ca
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never
parents:
1602
diff
changeset
|
1698 // it's being unloaded there's no way to look it up since the weak |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1699 // ref will have been cleared. |
38e8278318ca
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
1602
diff
changeset
|
1700 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1701 assert(!unload_reported(), "already unloaded"); |
2195
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|
1702 JvmtiDeferredEvent event = |
2342
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
parents:
2321
diff
changeset
|
1703 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
bf8517f4e4d0
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|
1704 _jmethod_id, insts_begin()); |
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|
1705 if (SafepointSynchronize::is_at_safepoint()) { |
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|
1706 // Don't want to take the queueing lock. Add it as pending and |
bf8517f4e4d0
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|
1707 // it will get enqueued later. |
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|
1708 JvmtiDeferredEventQueue::add_pending_event(event); |
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|
1709 } else { |
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|
1710 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1711 JvmtiDeferredEventQueue::enqueue(event); |
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|
1712 } |
0 | 1713 } |
1714 | |
1715 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1716 // any time. As the nmethod is being unloaded now we mark it has | |
1717 // having the unload event reported - this will ensure that we don't | |
1718 // attempt to report the event in the unlikely scenario where the | |
1719 // event is enabled at the time the nmethod is made a zombie. | |
1720 set_unload_reported(); | |
1721 } | |
1722 | |
20278
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|
1723 void static clean_ic_if_metadata_is_dead(CompiledIC *ic, BoolObjectClosure *is_alive) { |
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|
1724 if (ic->is_icholder_call()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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1725 // The only exception is compiledICHolder oops which may |
2c6ef90f030a
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|
1726 // yet be marked below. (We check this further below). |
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|
1727 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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|
1728 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1729 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1730 return; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1731 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1732 } else { |
2c6ef90f030a
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|
1733 Metadata* ic_oop = ic->cached_metadata(); |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1734 if (ic_oop != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1735 if (ic_oop->is_klass()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1736 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1737 return; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1738 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1739 } else if (ic_oop->is_method()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1740 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1741 return; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1742 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1743 } else { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1744 ShouldNotReachHere(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1745 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1746 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1747 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1748 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
1749 ic->set_to_clean(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
1750 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
1751 |
0 | 1752 // This is called at the end of the strong tracing/marking phase of a |
1753 // GC to unload an nmethod if it contains otherwise unreachable | |
1754 // oops. | |
1755 | |
6787
8966c2d65d96
7200470: KeepAliveClosure not needed in CodeCache::do_unloading
brutisso
parents:
6725
diff
changeset
|
1756 void nmethod::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 1757 // Make sure the oop's ready to receive visitors |
1758 assert(!is_zombie() && !is_unloaded(), | |
1759 "should not call follow on zombie or unloaded nmethod"); | |
1760 | |
1761 // If the method is not entrant then a JMP is plastered over the | |
1762 // first few bytes. If an oop in the old code was there, that oop | |
1763 // should not get GC'd. Skip the first few bytes of oops on | |
1764 // not-entrant methods. | |
1765 address low_boundary = verified_entry_point(); | |
1766 if (is_not_entrant()) { | |
1767 low_boundary += NativeJump::instruction_size; | |
1768 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1769 // (See comment above.) | |
1770 } | |
1771 | |
1772 // The RedefineClasses() API can cause the class unloading invariant | |
1773 // to no longer be true. See jvmtiExport.hpp for details. | |
1774 // Also, leave a debugging breadcrumb in local flag. | |
1775 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1776 if (a_class_was_redefined) { | |
1777 // This set of the unloading_occurred flag is done before the | |
1778 // call to post_compiled_method_unload() so that the unloading | |
1779 // of this nmethod is reported. | |
1780 unloading_occurred = true; | |
1781 } | |
1782 | |
1783 // Exception cache | |
20269 | 1784 clean_exception_cache(is_alive); |
0 | 1785 |
1786 // If class unloading occurred we first iterate over all inline caches and | |
1787 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1788 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1789 // iteration below. | |
1790 if (unloading_occurred) { | |
1791 RelocIterator iter(this, low_boundary); | |
1792 while(iter.next()) { | |
1793 if (iter.type() == relocInfo::virtual_call_type) { | |
20277
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8047362: Add a version of CompiledIC_at that doesn't create a new RelocIterator
stefank
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20269
diff
changeset
|
1794 CompiledIC *ic = CompiledIC_at(&iter); |
20278
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|
1795 clean_ic_if_metadata_is_dead(ic, is_alive); |
0 | 1796 } |
1797 } | |
1798 } | |
1799 | |
1800 // Compiled code | |
6725
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|
1801 { |
0 | 1802 RelocIterator iter(this, low_boundary); |
1803 while (iter.next()) { | |
1804 if (iter.type() == relocInfo::oop_type) { | |
1805 oop_Relocation* r = iter.oop_reloc(); | |
1806 // In this loop, we must only traverse those oops directly embedded in | |
1807 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1808 assert(1 == (r->oop_is_immediate()) + | |
1809 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1810 "oop must be found in exactly one place"); | |
1811 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
6787
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7200470: KeepAliveClosure not needed in CodeCache::do_unloading
brutisso
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6725
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|
1812 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
0 | 1813 return; |
1814 } | |
1815 } | |
1816 } | |
1817 } | |
6725
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|
1818 } |
0 | 1819 |
1820 | |
1821 // Scopes | |
1822 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1823 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
6787
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6725
diff
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|
1824 if (can_unload(is_alive, p, unloading_occurred)) { |
0 | 1825 return; |
1826 } | |
1827 } | |
1828 | |
6725
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|
1829 // Ensure that all metadata is still alive |
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|
1830 verify_metadata_loaders(low_boundary, is_alive); |
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|
1831 } |
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|
1832 |
20278
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|
1833 template <class CompiledICorStaticCall> |
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|
1834 static bool clean_if_nmethod_is_unloaded(CompiledICorStaticCall *ic, address addr, BoolObjectClosure *is_alive, nmethod* from) { |
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|
1835 // Ok, to lookup references to zombies here |
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|
1836 CodeBlob *cb = CodeCache::find_blob_unsafe(addr); |
2c6ef90f030a
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|
1837 if (cb != NULL && cb->is_nmethod()) { |
2c6ef90f030a
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|
1838 nmethod* nm = (nmethod*)cb; |
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|
1839 |
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|
1840 if (nm->unloading_clock() != nmethod::global_unloading_clock()) { |
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|
1841 // The nmethod has not been processed yet. |
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|
1842 return true; |
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|
1843 } |
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1844 |
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1845 // Clean inline caches pointing to both zombie and not_entrant methods |
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1846 if (!nm->is_in_use() || (nm->method()->code() != nm)) { |
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1847 ic->set_to_clean(); |
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1848 assert(ic->is_clean(), err_msg("nmethod " PTR_FORMAT "not clean %s", from, from->method()->name_and_sig_as_C_string())); |
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1849 } |
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|
1850 } |
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|
1851 |
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|
1852 return false; |
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|
1853 } |
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|
1854 |
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1855 static bool clean_if_nmethod_is_unloaded(CompiledIC *ic, BoolObjectClosure *is_alive, nmethod* from) { |
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1856 return clean_if_nmethod_is_unloaded(ic, ic->ic_destination(), is_alive, from); |
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1857 } |
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|
1858 |
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1859 static bool clean_if_nmethod_is_unloaded(CompiledStaticCall *csc, BoolObjectClosure *is_alive, nmethod* from) { |
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1860 return clean_if_nmethod_is_unloaded(csc, csc->destination(), is_alive, from); |
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1861 } |
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1862 |
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1863 bool nmethod::do_unloading_parallel(BoolObjectClosure* is_alive, bool unloading_occurred) { |
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1864 ResourceMark rm; |
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1865 |
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1866 // Make sure the oop's ready to receive visitors |
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1867 assert(!is_zombie() && !is_unloaded(), |
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1868 "should not call follow on zombie or unloaded nmethod"); |
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1869 |
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1870 // If the method is not entrant then a JMP is plastered over the |
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1871 // first few bytes. If an oop in the old code was there, that oop |
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1872 // should not get GC'd. Skip the first few bytes of oops on |
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1873 // not-entrant methods. |
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1874 address low_boundary = verified_entry_point(); |
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1875 if (is_not_entrant()) { |
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1876 low_boundary += NativeJump::instruction_size; |
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1877 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1878 // (See comment above.) |
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|
1879 } |
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|
1880 |
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1881 // The RedefineClasses() API can cause the class unloading invariant |
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1882 // to no longer be true. See jvmtiExport.hpp for details. |
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1883 // Also, leave a debugging breadcrumb in local flag. |
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1884 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); |
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1885 if (a_class_was_redefined) { |
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1886 // This set of the unloading_occurred flag is done before the |
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1887 // call to post_compiled_method_unload() so that the unloading |
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1888 // of this nmethod is reported. |
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|
1889 unloading_occurred = true; |
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|
1890 } |
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|
1891 |
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|
1892 // Exception cache |
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|
1893 clean_exception_cache(is_alive); |
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|
1894 |
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|
1895 bool is_unloaded = false; |
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1896 bool postponed = false; |
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|
1897 |
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|
1898 RelocIterator iter(this, low_boundary); |
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1899 while(iter.next()) { |
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|
1900 |
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1901 switch (iter.type()) { |
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|
1902 |
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1903 case relocInfo::virtual_call_type: |
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1904 if (unloading_occurred) { |
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1905 // If class unloading occurred we first iterate over all inline caches and |
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1906 // clear ICs where the cached oop is referring to an unloaded klass or method. |
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1907 clean_ic_if_metadata_is_dead(CompiledIC_at(&iter), is_alive); |
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1908 } |
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|
1909 |
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1910 postponed |= clean_if_nmethod_is_unloaded(CompiledIC_at(&iter), is_alive, this); |
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|
1911 break; |
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|
1912 |
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1913 case relocInfo::opt_virtual_call_type: |
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1914 postponed |= clean_if_nmethod_is_unloaded(CompiledIC_at(&iter), is_alive, this); |
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|
1915 break; |
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|
1916 |
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1917 case relocInfo::static_call_type: |
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1918 postponed |= clean_if_nmethod_is_unloaded(compiledStaticCall_at(iter.reloc()), is_alive, this); |
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1919 break; |
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|
1920 |
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1921 case relocInfo::oop_type: |
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1922 if (!is_unloaded) { |
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|
1923 // Unload check |
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1924 oop_Relocation* r = iter.oop_reloc(); |
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1925 // Traverse those oops directly embedded in the code. |
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1926 // Other oops (oop_index>0) are seen as part of scopes_oops. |
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1927 assert(1 == (r->oop_is_immediate()) + |
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1928 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), |
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1929 "oop must be found in exactly one place"); |
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1930 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
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1931 if (can_unload(is_alive, r->oop_addr(), unloading_occurred)) { |
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1932 is_unloaded = true; |
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|
1933 } |
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|
1934 } |
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|
1935 } |
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|
1936 break; |
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|
1937 |
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|
1938 } |
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|
1939 } |
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|
1940 |
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1941 if (is_unloaded) { |
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1942 return postponed; |
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|
1943 } |
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|
1944 |
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|
1945 // Scopes |
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1946 for (oop* p = oops_begin(); p < oops_end(); p++) { |
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1947 if (*p == Universe::non_oop_word()) continue; // skip non-oops |
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1948 if (can_unload(is_alive, p, unloading_occurred)) { |
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1949 is_unloaded = true; |
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|
1950 break; |
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|
1951 } |
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|
1952 } |
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|
1953 |
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|
1954 if (is_unloaded) { |
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|
1955 return postponed; |
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|
1956 } |
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|
1957 |
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|
1958 // Ensure that all metadata is still alive |
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|
1959 verify_metadata_loaders(low_boundary, is_alive); |
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|
1960 |
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|
1961 return postponed; |
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|
1962 } |
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|
1963 |
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|
1964 void nmethod::do_unloading_parallel_postponed(BoolObjectClosure* is_alive, bool unloading_occurred) { |
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1965 ResourceMark rm; |
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|
1966 |
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|
1967 // Make sure the oop's ready to receive visitors |
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|
1968 assert(!is_zombie(), |
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|
1969 "should not call follow on zombie nmethod"); |
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|
1970 |
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|
1971 // If the method is not entrant then a JMP is plastered over the |
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1972 // first few bytes. If an oop in the old code was there, that oop |
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1973 // should not get GC'd. Skip the first few bytes of oops on |
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1974 // not-entrant methods. |
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1975 address low_boundary = verified_entry_point(); |
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1976 if (is_not_entrant()) { |
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1977 low_boundary += NativeJump::instruction_size; |
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1978 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1979 // (See comment above.) |
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1980 } |
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1981 |
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1982 RelocIterator iter(this, low_boundary); |
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1983 while(iter.next()) { |
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1984 |
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1985 switch (iter.type()) { |
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1986 |
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1987 case relocInfo::virtual_call_type: |
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1988 clean_if_nmethod_is_unloaded(CompiledIC_at(&iter), is_alive, this); |
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1989 break; |
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1990 |
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1991 case relocInfo::opt_virtual_call_type: |
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1992 clean_if_nmethod_is_unloaded(CompiledIC_at(&iter), is_alive, this); |
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1993 break; |
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1994 |
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1995 case relocInfo::static_call_type: |
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1996 clean_if_nmethod_is_unloaded(compiledStaticCall_at(iter.reloc()), is_alive, this); |
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1997 break; |
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1998 } |
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1999 } |
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2000 } |
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2001 |
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2002 #ifdef ASSERT |
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2003 |
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2004 class CheckClass : AllStatic { |
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2005 static BoolObjectClosure* _is_alive; |
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2006 |
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2007 // Check class_loader is alive for this bit of metadata. |
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2008 static void check_class(Metadata* md) { |
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2009 Klass* klass = NULL; |
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2010 if (md->is_klass()) { |
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2011 klass = ((Klass*)md); |
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2012 } else if (md->is_method()) { |
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2013 klass = ((Method*)md)->method_holder(); |
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2014 } else if (md->is_methodData()) { |
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2015 klass = ((MethodData*)md)->method()->method_holder(); |
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2016 } else { |
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2017 md->print(); |
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2018 ShouldNotReachHere(); |
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2019 } |
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2020 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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2021 } |
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2022 public: |
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2023 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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2024 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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2025 _is_alive = is_alive; |
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2026 nm->metadata_do(check_class); |
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2027 } |
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2028 }; |
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2029 |
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2030 // This is called during a safepoint so can use static data |
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2031 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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2032 #endif // ASSERT |
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2033 |
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2034 |
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2035 // Processing of oop references should have been sufficient to keep |
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2036 // all strong references alive. Any weak references should have been |
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2037 // cleared as well. Visit all the metadata and ensure that it's |
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2038 // really alive. |
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2039 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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2040 #ifdef ASSERT |
0 | 2041 RelocIterator iter(this, low_boundary); |
2042 while (iter.next()) { | |
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2043 // static_stub_Relocations may have dangling references to |
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2044 // Method*s so trim them out here. Otherwise it looks like |
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2045 // compiled code is maintaining a link to dead metadata. |
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2046 address static_call_addr = NULL; |
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2047 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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2048 CompiledIC* cic = CompiledIC_at(&iter); |
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2049 if (!cic->is_call_to_interpreted()) { |
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2050 static_call_addr = iter.addr(); |
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2051 } |
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2052 } else if (iter.type() == relocInfo::static_call_type) { |
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2053 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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2054 if (!csc->is_call_to_interpreted()) { |
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2055 static_call_addr = iter.addr(); |
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2056 } |
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2057 } |
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2058 if (static_call_addr != NULL) { |
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2059 RelocIterator sciter(this, low_boundary); |
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2060 while (sciter.next()) { |
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2061 if (sciter.type() == relocInfo::static_stub_type && |
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2062 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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2063 sciter.static_stub_reloc()->clear_inline_cache(); |
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2064 } |
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2065 } |
0 | 2066 } |
2067 } | |
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2068 // Check that the metadata embedded in the nmethod is alive |
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2069 CheckClass::do_check_class(is_alive, this); |
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2070 #endif |
0 | 2071 } |
2072 | |
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2073 |
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2074 // Iterate over metadata calling this function. Used by RedefineClasses |
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2075 void nmethod::metadata_do(void f(Metadata*)) { |
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2076 address low_boundary = verified_entry_point(); |
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2077 if (is_not_entrant()) { |
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2078 low_boundary += NativeJump::instruction_size; |
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2079 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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2080 // (See comment above.) |
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2081 } |
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2082 { |
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2083 // Visit all immediate references that are embedded in the instruction stream. |
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2084 RelocIterator iter(this, low_boundary); |
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2085 while (iter.next()) { |
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2086 if (iter.type() == relocInfo::metadata_type ) { |
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2087 metadata_Relocation* r = iter.metadata_reloc(); |
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2088 // In this lmetadata, we must only follow those metadatas directly embedded in |
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2089 // the code. Other metadatas (oop_index>0) are seen as part of |
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2090 // the metadata section below. |
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2091 assert(1 == (r->metadata_is_immediate()) + |
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2092 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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2093 "metadata must be found in exactly one place"); |
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2094 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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2095 Metadata* md = r->metadata_value(); |
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2096 f(md); |
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2097 } |
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2098 } else if (iter.type() == relocInfo::virtual_call_type) { |
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2099 // Check compiledIC holders associated with this nmethod |
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2100 CompiledIC *ic = CompiledIC_at(&iter); |
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2101 if (ic->is_icholder_call()) { |
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2102 CompiledICHolder* cichk = ic->cached_icholder(); |
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2103 f(cichk->holder_method()); |
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2104 f(cichk->holder_klass()); |
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2105 } else { |
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2106 Metadata* ic_oop = ic->cached_metadata(); |
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2107 if (ic_oop != NULL) { |
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2108 f(ic_oop); |
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2109 } |
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2110 } |
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2111 } |
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2112 } |
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2113 } |
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2114 |
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2115 // Visit the metadata section |
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2116 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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2117 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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2118 Metadata* md = *p; |
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2119 f(md); |
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2120 } |
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2121 |
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2122 // Call function Method*, not embedded in these other places. |
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2123 if (_method != NULL) f(_method); |
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2124 } |
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2125 |
12080 | 2126 void nmethod::oops_do(OopClosure* f, bool allow_zombie) { |
0 | 2127 // make sure the oops ready to receive visitors |
12080 | 2128 assert(allow_zombie || !is_zombie(), "should not call follow on zombie nmethod"); |
2129 assert(!is_unloaded(), "should not call follow on unloaded nmethod"); | |
0 | 2130 |
2131 // If the method is not entrant or zombie then a JMP is plastered over the | |
2132 // first few bytes. If an oop in the old code was there, that oop | |
2133 // should not get GC'd. Skip the first few bytes of oops on | |
2134 // not-entrant methods. | |
2135 address low_boundary = verified_entry_point(); | |
2136 if (is_not_entrant()) { | |
2137 low_boundary += NativeJump::instruction_size; | |
2138 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
2139 // (See comment above.) | |
2140 } | |
2141 | |
2142 RelocIterator iter(this, low_boundary); | |
941 | 2143 |
0 | 2144 while (iter.next()) { |
2145 if (iter.type() == relocInfo::oop_type ) { | |
2146 oop_Relocation* r = iter.oop_reloc(); | |
2147 // In this loop, we must only follow those oops directly embedded in | |
2148 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 2149 assert(1 == (r->oop_is_immediate()) + |
2150 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
2151 "oop must be found in exactly one place"); | |
0 | 2152 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
2153 f->do_oop(r->oop_addr()); | |
2154 } | |
2155 } | |
2156 } | |
2157 | |
2158 // Scopes | |
989
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2159 // This includes oop constants not inlined in the code stream. |
0 | 2160 for (oop* p = oops_begin(); p < oops_end(); p++) { |
2161 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
2162 f->do_oop(p); | |
2163 } | |
2164 } | |
2165 | |
989
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2166 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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2167 |
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2168 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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2169 |
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2170 // An nmethod is "marked" if its _mark_link is set non-null. |
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2171 // Even if it is the end of the linked list, it will have a non-null link value, |
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2172 // as long as it is on the list. |
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2173 // This code must be MP safe, because it is used from parallel GC passes. |
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2174 bool nmethod::test_set_oops_do_mark() { |
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2175 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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2176 nmethod* observed_mark_link = _oops_do_mark_link; |
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2177 if (observed_mark_link == NULL) { |
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2178 // Claim this nmethod for this thread to mark. |
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2179 observed_mark_link = (nmethod*) |
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2180 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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2181 if (observed_mark_link == NULL) { |
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2182 |
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2183 // Atomically append this nmethod (now claimed) to the head of the list: |
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2184 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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2185 for (;;) { |
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2186 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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2187 _oops_do_mark_link = required_mark_nmethods; |
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2188 observed_mark_nmethods = (nmethod*) |
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2189 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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2190 if (observed_mark_nmethods == required_mark_nmethods) |
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2191 break; |
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2192 } |
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2193 // Mark was clear when we first saw this guy. |
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2194 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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2195 return false; |
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2196 } |
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2197 } |
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2198 // On fall through, another racing thread marked this nmethod before we did. |
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2199 return true; |
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2200 } |
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2201 |
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2202 void nmethod::oops_do_marking_prologue() { |
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2203 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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2204 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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2205 // We use cmpxchg_ptr instead of regular assignment here because the user |
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2206 // may fork a bunch of threads, and we need them all to see the same state. |
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2207 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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2208 guarantee(observed == NULL, "no races in this sequential code"); |
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2209 } |
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2210 |
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2211 void nmethod::oops_do_marking_epilogue() { |
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2212 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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2213 nmethod* cur = _oops_do_mark_nmethods; |
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2214 while (cur != NMETHOD_SENTINEL) { |
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2215 assert(cur != NULL, "not NULL-terminated"); |
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2216 nmethod* next = cur->_oops_do_mark_link; |
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2217 cur->_oops_do_mark_link = NULL; |
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2218 cur->verify_oop_relocations(); |
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2219 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
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2220 cur = next; |
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2221 } |
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2222 void* required = _oops_do_mark_nmethods; |
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2223 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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2224 guarantee(observed == required, "no races in this sequential code"); |
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2225 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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2226 } |
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2227 |
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2228 class DetectScavengeRoot: public OopClosure { |
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2229 bool _detected_scavenge_root; |
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2230 public: |
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2231 DetectScavengeRoot() : _detected_scavenge_root(false) |
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2232 { NOT_PRODUCT(_print_nm = NULL); } |
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2233 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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2234 virtual void do_oop(oop* p) { |
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2235 if ((*p) != NULL && (*p)->is_scavengable()) { |
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2236 NOT_PRODUCT(maybe_print(p)); |
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2237 _detected_scavenge_root = true; |
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2238 } |
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2239 } |
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2240 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2241 |
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2242 #ifndef PRODUCT |
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2243 nmethod* _print_nm; |
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2244 void maybe_print(oop* p) { |
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2245 if (_print_nm == NULL) return; |
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2246 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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2247 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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2248 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
12316
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2249 (void *)(*p), (intptr_t)p); |
989
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2250 (*p)->print(); |
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2251 } |
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2252 #endif //PRODUCT |
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2253 }; |
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2254 |
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2255 bool nmethod::detect_scavenge_root_oops() { |
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2256 DetectScavengeRoot detect_scavenge_root; |
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2257 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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2258 oops_do(&detect_scavenge_root); |
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2259 return detect_scavenge_root.detected_scavenge_root(); |
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2260 } |
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2261 |
0 | 2262 // Method that knows how to preserve outgoing arguments at call. This method must be |
2263 // called with a frame corresponding to a Java invoke | |
2264 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 2265 #ifndef SHARK |
0 | 2266 if (!method()->is_native()) { |
2267 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 2268 Bytecode_invoke call(ssd.method(), ssd.bci()); |
10390 | 2269 bool has_receiver = call.has_receiver(); |
2270 bool has_appendix = call.has_appendix(); | |
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2271 Symbol* signature = call.signature(); |
10390 | 2272 fr.oops_compiled_arguments_do(signature, has_receiver, has_appendix, reg_map, f); |
0 | 2273 } |
1692 | 2274 #endif // !SHARK |
0 | 2275 } |
2276 | |
2277 | |
2278 oop nmethod::embeddedOop_at(u_char* p) { | |
2349
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2279 RelocIterator iter(this, p, p + 1); |
0 | 2280 while (iter.next()) |
2281 if (iter.type() == relocInfo::oop_type) { | |
2282 return iter.oop_reloc()->oop_value(); | |
2283 } | |
2284 return NULL; | |
2285 } | |
2286 | |
2287 | |
2288 inline bool includes(void* p, void* from, void* to) { | |
2289 return from <= p && p < to; | |
2290 } | |
2291 | |
2292 | |
2293 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
2294 assert(count >= 2, "must be sentinel values, at least"); | |
2295 | |
2296 #ifdef ASSERT | |
2297 // must be sorted and unique; we do a binary search in find_pc_desc() | |
2298 int prev_offset = pcs[0].pc_offset(); | |
2299 assert(prev_offset == PcDesc::lower_offset_limit, | |
2300 "must start with a sentinel"); | |
2301 for (int i = 1; i < count; i++) { | |
2302 int this_offset = pcs[i].pc_offset(); | |
2303 assert(this_offset > prev_offset, "offsets must be sorted"); | |
2304 prev_offset = this_offset; | |
2305 } | |
2306 assert(prev_offset == PcDesc::upper_offset_limit, | |
2307 "must end with a sentinel"); | |
2308 #endif //ASSERT | |
2309 | |
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2310 // Search for MethodHandle invokes and tag the nmethod. |
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2311 for (int i = 0; i < count; i++) { |
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2312 if (pcs[i].is_method_handle_invoke()) { |
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2313 set_has_method_handle_invokes(true); |
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2314 break; |
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2315 } |
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2316 } |
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2317 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2318 |
0 | 2319 int size = count * sizeof(PcDesc); |
2320 assert(scopes_pcs_size() >= size, "oob"); | |
2321 memcpy(scopes_pcs_begin(), pcs, size); | |
2322 | |
2323 // Adjust the final sentinel downward. | |
2324 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2325 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2326 last_pc->set_pc_offset(content_size() + 1); |
0 | 2327 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2328 // Fill any rounding gaps with copies of the last record. | |
2329 last_pc[1] = last_pc[0]; | |
2330 } | |
2331 // The following assert could fail if sizeof(PcDesc) is not | |
2332 // an integral multiple of oopSize (the rounding term). | |
2333 // If it fails, change the logic to always allocate a multiple | |
2334 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2335 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2336 } | |
2337 | |
2338 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2339 assert(scopes_data_size() >= size, "oob"); | |
2340 memcpy(scopes_data_begin(), buffer, size); | |
2341 } | |
2342 | |
2343 | |
2344 #ifdef ASSERT | |
2345 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2346 PcDesc* lower = nm->scopes_pcs_begin(); | |
2347 PcDesc* upper = nm->scopes_pcs_end(); | |
2348 lower += 1; // exclude initial sentinel | |
2349 PcDesc* res = NULL; | |
2350 for (PcDesc* p = lower; p < upper; p++) { | |
2351 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2352 if (match_desc(p, pc_offset, approximate)) { | |
2353 if (res == NULL) | |
2354 res = p; | |
2355 else | |
2356 res = (PcDesc*) badAddress; | |
2357 } | |
2358 } | |
2359 return res; | |
2360 } | |
2361 #endif | |
2362 | |
2363 | |
2364 // Finds a PcDesc with real-pc equal to "pc" | |
2365 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2366 address base_address = code_begin(); |
0 | 2367 if ((pc < base_address) || |
2368 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2369 return NULL; // PC is wildly out of range | |
2370 } | |
2371 int pc_offset = (int) (pc - base_address); | |
2372 | |
2373 // Check the PcDesc cache if it contains the desired PcDesc | |
2374 // (This as an almost 100% hit rate.) | |
2375 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2376 if (res != NULL) { | |
2377 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2378 return res; | |
2379 } | |
2380 | |
2381 // Fallback algorithm: quasi-linear search for the PcDesc | |
2382 // Find the last pc_offset less than the given offset. | |
2383 // The successor must be the required match, if there is a match at all. | |
2384 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2385 PcDesc* lower = scopes_pcs_begin(); | |
2386 PcDesc* upper = scopes_pcs_end(); | |
2387 upper -= 1; // exclude final sentinel | |
2388 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2389 | |
2390 #define assert_LU_OK \ | |
2391 /* invariant on lower..upper during the following search: */ \ | |
2392 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2393 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2394 assert_LU_OK; | |
2395 | |
2396 // Use the last successful return as a split point. | |
2397 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2398 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2399 if (mid->pc_offset() < pc_offset) { | |
2400 lower = mid; | |
2401 } else { | |
2402 upper = mid; | |
2403 } | |
2404 | |
2405 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2406 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2407 const int RADIX = (1 << LOG2_RADIX); | |
2408 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2409 while ((mid = lower + step) < upper) { | |
2410 assert_LU_OK; | |
2411 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2412 if (mid->pc_offset() < pc_offset) { | |
2413 lower = mid; | |
2414 } else { | |
2415 upper = mid; | |
2416 break; | |
2417 } | |
2418 } | |
2419 assert_LU_OK; | |
2420 } | |
2421 | |
2422 // Sneak up on the value with a linear search of length ~16. | |
2423 while (true) { | |
2424 assert_LU_OK; | |
2425 mid = lower + 1; | |
2426 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2427 if (mid->pc_offset() < pc_offset) { | |
2428 lower = mid; | |
2429 } else { | |
2430 upper = mid; | |
2431 break; | |
2432 } | |
2433 } | |
2434 #undef assert_LU_OK | |
2435 | |
2436 if (match_desc(upper, pc_offset, approximate)) { | |
2437 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2438 _pc_desc_cache.add_pc_desc(upper); | |
2439 return upper; | |
2440 } else { | |
2441 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2442 return NULL; | |
2443 } | |
2444 } | |
2445 | |
2446 | |
2447 bool nmethod::check_all_dependencies() { | |
2448 bool found_check = false; | |
2449 // wholesale check of all dependencies | |
2450 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2451 if (deps.check_dependency() != NULL) { | |
2452 found_check = true; | |
2453 NOT_DEBUG(break); | |
2454 } | |
2455 } | |
2456 return found_check; // tell caller if we found anything | |
2457 } | |
2458 | |
2459 bool nmethod::check_dependency_on(DepChange& changes) { | |
2460 // What has happened: | |
2461 // 1) a new class dependee has been added | |
2462 // 2) dependee and all its super classes have been marked | |
2463 bool found_check = false; // set true if we are upset | |
2464 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2465 // Evaluate only relevant dependencies. | |
2466 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2467 found_check = true; | |
2468 NOT_DEBUG(break); | |
2469 } | |
2470 } | |
2471 return found_check; | |
2472 } | |
2473 | |
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2474 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2475 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2476 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2477 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2478 if (deps.type() == Dependencies::evol_method) { | |
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2479 Method* method = deps.method_argument(0); |
0 | 2480 for (int j = 0; j < dependee_methods->length(); j++) { |
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2481 if (dependee_methods->at(j) == method) { |
0 | 2482 // RC_TRACE macro has an embedded ResourceMark |
2483 RC_TRACE(0x01000000, | |
2484 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2485 _method->method_holder()->external_name(), |
0 | 2486 _method->name()->as_C_string(), |
2487 _method->signature()->as_C_string(), compile_id(), | |
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2488 method->method_holder()->external_name(), |
0 | 2489 method->name()->as_C_string(), |
2490 method->signature()->as_C_string())); | |
2491 if (TraceDependencies || LogCompilation) | |
2492 deps.log_dependency(dependee); | |
2493 return true; | |
2494 } | |
2495 } | |
2496 } | |
2497 } | |
2498 return false; | |
2499 } | |
2500 | |
2501 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2502 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2503 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2504 if (deps.type() != Dependencies::evol_method) | |
2505 continue; | |
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2506 Method* method = deps.method_argument(0); |
0 | 2507 if (method == dependee) return true; |
2508 } | |
2509 return false; | |
2510 } | |
2511 | |
2512 | |
2513 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2514 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2515 if (is_zombie()) { |
2516 // a zombie may never be patched | |
2517 return false; | |
2518 } | |
2519 return true; | |
2520 } | |
2521 | |
2522 | |
2523 address nmethod::continuation_for_implicit_exception(address pc) { | |
2524 // Exception happened outside inline-cache check code => we are inside | |
2525 // an active nmethod => use cpc to determine a return address | |
1748 | 2526 int exception_offset = pc - code_begin(); |
0 | 2527 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2528 #ifdef ASSERT | |
2529 if (cont_offset == 0) { | |
2530 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2531 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2532 HandleMark hm(thread); | |
2533 ResourceMark rm(thread); | |
2534 CodeBlob* cb = CodeCache::find_blob(pc); | |
2535 assert(cb != NULL && cb == this, ""); | |
2536 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2537 print(); | |
2538 method()->print_codes(); | |
2539 print_code(); | |
2540 print_pcs(); | |
2541 } | |
2542 #endif | |
1250 | 2543 if (cont_offset == 0) { |
2544 // Let the normal error handling report the exception | |
2545 return NULL; | |
2546 } | |
1748 | 2547 return code_begin() + cont_offset; |
0 | 2548 } |
2549 | |
2550 | |
2551 | |
2552 void nmethod_init() { | |
2553 // make sure you didn't forget to adjust the filler fields | |
2554 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2555 } | |
2556 | |
2557 | |
2558 //------------------------------------------------------------------------------------------- | |
2559 | |
2560 | |
2561 // QQQ might we make this work from a frame?? | |
2562 nmethodLocker::nmethodLocker(address pc) { | |
2563 CodeBlob* cb = CodeCache::find_blob(pc); | |
2564 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2565 _nm = (nmethod*)cb; | |
2566 lock_nmethod(_nm); | |
2567 } | |
2568 | |
2342
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2569 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2570 // should pass zombie_ok == true. |
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2571 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2572 if (nm == NULL) return; |
2573 Atomic::inc(&nm->_lock_count); | |
2342
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2574 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2575 } |
2576 | |
2577 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2578 if (nm == NULL) return; | |
2579 Atomic::dec(&nm->_lock_count); | |
2580 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2581 } | |
2582 | |
1204 | 2583 |
2584 // ----------------------------------------------------------------------------- | |
2585 // nmethod::get_deopt_original_pc | |
2586 // | |
2587 // Return the original PC for the given PC if: | |
2588 // (a) the given PC belongs to a nmethod and | |
2589 // (b) it is a deopt PC | |
2590 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2591 if (fr->cb() == NULL) return NULL; | |
2592 | |
2593 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2594 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2595 return nm->get_original_pc(fr); | |
2596 | |
2597 return NULL; | |
0 | 2598 } |
2599 | |
2600 | |
2601 // ----------------------------------------------------------------------------- | |
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2602 // MethodHandle |
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2603 |
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2604 bool nmethod::is_method_handle_return(address return_pc) { |
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2605 if (!has_method_handle_invokes()) return false; |
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2606 PcDesc* pd = pc_desc_at(return_pc); |
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2607 if (pd == NULL) |
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2608 return false; |
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2609 return pd->is_method_handle_invoke(); |
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2610 } |
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2611 |
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2612 |
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2613 // ----------------------------------------------------------------------------- |
0 | 2614 // Verification |
2615 | |
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2616 class VerifyOopsClosure: public OopClosure { |
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2617 nmethod* _nm; |
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|
2618 bool _ok; |
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|
2619 public: |
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|
2620 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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|
2621 bool ok() { return _ok; } |
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|
2622 virtual void do_oop(oop* p) { |
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2623 if ((*p) == NULL || (*p)->is_oop()) return; |
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|
2624 if (_ok) { |
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|
2625 _nm->print_nmethod(true); |
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|
2626 _ok = false; |
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|
2627 } |
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|
2628 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
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changeset
|
2629 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
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|
2630 } |
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|
2631 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2632 }; |
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|
2633 |
0 | 2634 void nmethod::verify() { |
2635 | |
2636 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2637 // seems odd. | |
2638 | |
2639 if( is_zombie() || is_not_entrant() ) | |
2640 return; | |
2641 | |
2642 // Make sure all the entry points are correctly aligned for patching. | |
2643 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2644 | |
6725
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|
2645 // assert(method()->is_oop(), "must be valid"); |
0 | 2646 |
2647 ResourceMark rm; | |
2648 | |
2649 if (!CodeCache::contains(this)) { | |
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
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1489
diff
changeset
|
2650 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2651 } |
2652 | |
2653 if(is_native_method() ) | |
2654 return; | |
2655 | |
2656 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2657 if (nm != this) { | |
1490
f03d0a26bf83
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1489
diff
changeset
|
2658 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
f03d0a26bf83
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jcoomes
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1489
diff
changeset
|
2659 this)); |
0 | 2660 } |
2661 | |
2662 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2663 if (! p->verify(this)) { | |
2664 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2665 } | |
2666 } | |
2667 | |
989
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changeset
|
2668 VerifyOopsClosure voc(this); |
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|
2669 oops_do(&voc); |
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changeset
|
2670 assert(voc.ok(), "embedded oops must be OK"); |
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|
2671 verify_scavenge_root_oops(); |
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changeset
|
2672 |
0 | 2673 verify_scopes(); |
2674 } | |
2675 | |
2676 | |
2677 void nmethod::verify_interrupt_point(address call_site) { | |
13071
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
parents:
12334
diff
changeset
|
2678 // Verify IC only when nmethod installation is finished. |
13441 | 2679 bool is_installed = (method()->code() == this) // nmethod is in state 'in_use' and installed |
2680 || !this->is_in_use(); // nmethod is installed, but not in 'in_use' state | |
13071
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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12334
diff
changeset
|
2681 if (is_installed) { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
parents:
12334
diff
changeset
|
2682 Thread *cur = Thread::current(); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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12334
diff
changeset
|
2683 if (CompiledIC_lock->owner() == cur || |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
parents:
12334
diff
changeset
|
2684 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
parents:
12334
diff
changeset
|
2685 SafepointSynchronize::is_at_safepoint())) { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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12334
diff
changeset
|
2686 CompiledIC_at(this, call_site); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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diff
changeset
|
2687 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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12334
diff
changeset
|
2688 } else { |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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12334
diff
changeset
|
2689 MutexLocker ml_verify (CompiledIC_lock); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
parents:
12334
diff
changeset
|
2690 CompiledIC_at(this, call_site); |
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
vlivanov
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12334
diff
changeset
|
2691 } |
0 | 2692 } |
13071
e2509677809c
8023037: Race between ciEnv::register_method and nmethod::make_not_entrant_or_zombie
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12334
diff
changeset
|
2693 |
e2509677809c
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12334
diff
changeset
|
2694 PcDesc* pd = pc_desc_at(nativeCall_at(call_site)->return_address()); |
0 | 2695 assert(pd != NULL, "PcDesc must exist"); |
2696 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2697 pd->obj_decode_offset(), pd->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2698 pd->return_oop()); |
0 | 2699 !sd->is_top(); sd = sd->sender()) { |
2700 sd->verify(); | |
2701 } | |
2702 } | |
2703 | |
2704 void nmethod::verify_scopes() { | |
2705 if( !method() ) return; // Runtime stubs have no scope | |
2706 if (method()->is_native()) return; // Ignore stub methods. | |
2707 // iterate through all interrupt point | |
2708 // and verify the debug information is valid. | |
2709 RelocIterator iter((nmethod*)this); | |
2710 while (iter.next()) { | |
2711 address stub = NULL; | |
2712 switch (iter.type()) { | |
2713 case relocInfo::virtual_call_type: | |
2714 verify_interrupt_point(iter.addr()); | |
2715 break; | |
2716 case relocInfo::opt_virtual_call_type: | |
2717 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2718 verify_interrupt_point(iter.addr()); | |
2719 break; | |
2720 case relocInfo::static_call_type: | |
2721 stub = iter.static_call_reloc()->static_stub(); | |
2722 //verify_interrupt_point(iter.addr()); | |
2723 break; | |
2724 case relocInfo::runtime_call_type: | |
2725 address destination = iter.reloc()->value(); | |
2726 // Right now there is no way to find out which entries support | |
2727 // an interrupt point. It would be nice if we had this | |
2728 // information in a table. | |
2729 break; | |
2730 } | |
2731 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2732 } | |
2733 } | |
2734 | |
2735 | |
2736 // ----------------------------------------------------------------------------- | |
2737 // Non-product code | |
2738 #ifndef PRODUCT | |
2739 | |
989
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6863023: need non-perm oops in code cache for JSR 292
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parents:
931
diff
changeset
|
2740 class DebugScavengeRoot: public OopClosure { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2741 nmethod* _nm; |
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6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2742 bool _ok; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2743 public: |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2744 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2745 bool ok() { return _ok; } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2746 virtual void do_oop(oop* p) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2747 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2748 if (_ok) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2749 _nm->print_nmethod(true); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2750 _ok = false; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2751 } |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
2405
diff
changeset
|
2752 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12175
diff
changeset
|
2753 (void *)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2754 (*p)->print(); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2755 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2756 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2757 }; |
0 | 2758 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2759 void nmethod::verify_scavenge_root_oops() { |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20277
diff
changeset
|
2760 if (UseG1GC) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20277
diff
changeset
|
2761 return; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20277
diff
changeset
|
2762 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20277
diff
changeset
|
2763 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2764 if (!on_scavenge_root_list()) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2765 // Actually look inside, to verify the claim that it's clean. |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2766 DebugScavengeRoot debug_scavenge_root(this); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2767 oops_do(&debug_scavenge_root); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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931
diff
changeset
|
2768 if (!debug_scavenge_root.ok()) |
3377
2aa9ddbb9e60
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
2405
diff
changeset
|
2769 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2770 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2771 assert(scavenge_root_not_marked(), ""); |
0 | 2772 } |
2773 | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2774 #endif // PRODUCT |
0 | 2775 |
2776 // Printing operations | |
2777 | |
2778 void nmethod::print() const { | |
2779 ResourceMark rm; | |
2780 ttyLocker ttyl; // keep the following output all in one block | |
2781 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2782 tty->print("Compiled method "); |
0 | 2783 |
2784 if (is_compiled_by_c1()) { | |
2785 tty->print("(c1) "); | |
2786 } else if (is_compiled_by_c2()) { | |
2787 tty->print("(c2) "); | |
1692 | 2788 } else if (is_compiled_by_shark()) { |
2789 tty->print("(shark) "); | |
0 | 2790 } else { |
2791 tty->print("(nm) "); | |
2792 } | |
2793 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2794 print_on(tty, NULL); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2795 |
0 | 2796 if (WizardMode) { |
2797 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2798 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2799 tty->print(" { "); | |
2800 if (is_in_use()) tty->print("in_use "); | |
2801 if (is_not_entrant()) tty->print("not_entrant "); | |
2802 if (is_zombie()) tty->print("zombie "); | |
2803 if (is_unloaded()) tty->print("unloaded "); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
931
diff
changeset
|
2804 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2805 tty->print_cr("}:"); |
2806 } | |
2807 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2808 (address)this, | |
2809 (address)this + size(), | |
2810 size()); | |
2811 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2812 relocation_begin(), | |
2813 relocation_end(), | |
2814 relocation_size()); | |
1762
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2815 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
|
2816 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2817 consts_end(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2818 consts_size()); |
1748 | 2819 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2820 insts_begin(), | |
2821 insts_end(), | |
2822 insts_size()); | |
0 | 2823 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2824 stub_begin(), | |
2825 stub_end(), | |
2826 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2827 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2828 oops_begin(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2829 oops_end(), |
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1538
diff
changeset
|
2830 oops_size()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2831 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2832 metadata_begin(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2833 metadata_end(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
2834 metadata_size()); |
0 | 2835 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2836 scopes_data_begin(), | |
2837 scopes_data_end(), | |
2838 scopes_data_size()); | |
2839 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2840 scopes_pcs_begin(), | |
2841 scopes_pcs_end(), | |
2842 scopes_pcs_size()); | |
2843 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2844 dependencies_begin(), | |
2845 dependencies_end(), | |
2846 dependencies_size()); | |
2847 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2848 handler_table_begin(), | |
2849 handler_table_end(), | |
2850 handler_table_size()); | |
2851 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2852 nul_chk_table_begin(), | |
2853 nul_chk_table_end(), | |
2854 nul_chk_table_size()); | |
2855 } | |
2856 | |
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diff
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|
2857 void nmethod::print_code() { |
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diff
changeset
|
2858 HandleMark hm; |
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diff
changeset
|
2859 ResourceMark m; |
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diff
changeset
|
2860 Disassembler::decode(this); |
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diff
changeset
|
2861 } |
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diff
changeset
|
2862 |
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diff
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|
2863 |
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|
2864 #ifndef PRODUCT |
0 | 2865 |
2866 void nmethod::print_scopes() { | |
2867 // Find the first pc desc for all scopes in the code and print it. | |
2868 ResourceMark rm; | |
2869 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2870 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2871 continue; | |
2872 | |
2873 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2874 sd->print_on(tty, p); | |
2875 } | |
2876 } | |
2877 | |
2878 void nmethod::print_dependencies() { | |
2879 ResourceMark rm; | |
2880 ttyLocker ttyl; // keep the following output all in one block | |
2881 tty->print_cr("Dependencies:"); | |
2882 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2883 deps.print_dependency(); | |
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2884 Klass* ctxk = deps.context_type(); |
0 | 2885 if (ctxk != NULL) { |
6983 | 2886 if (ctxk->oop_is_instance() && ((InstanceKlass*)ctxk)->is_dependent_nmethod(this)) { |
2887 tty->print_cr(" [nmethod<=klass]%s", ctxk->external_name()); | |
0 | 2888 } |
2889 } | |
2890 deps.log_dependency(); // put it into the xml log also | |
2891 } | |
2892 } | |
2893 | |
2894 | |
2895 void nmethod::print_relocations() { | |
2896 ResourceMark m; // in case methods get printed via the debugger | |
2897 tty->print_cr("relocations:"); | |
2898 RelocIterator iter(this); | |
2899 iter.print(); | |
2900 if (UseRelocIndex) { | |
2901 jint* index_end = (jint*)relocation_end() - 1; | |
2902 jint index_size = *index_end; | |
2903 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2904 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2905 if (index_size > 0) { | |
2906 jint* ip; | |
2907 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2908 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2909 ip[0], | |
2910 ip[1], | |
2911 header_end()+ip[0], | |
2912 relocation_begin()-1+ip[1]); | |
2913 for (; ip < index_end; ip++) | |
2914 tty->print_cr(" (%d ?)", ip[0]); | |
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diff
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|
2915 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip); |
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|
2916 ip++; |
0 | 2917 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); |
2918 } | |
2919 } | |
2920 } | |
2921 | |
2922 | |
2923 void nmethod::print_pcs() { | |
2924 ResourceMark m; // in case methods get printed via debugger | |
2925 tty->print_cr("pc-bytecode offsets:"); | |
2926 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2927 p->print(this); | |
2928 } | |
2929 } | |
2930 | |
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|
2931 #endif // PRODUCT |
0 | 2932 |
2933 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2934 RelocIterator iter(this, begin, end); | |
2935 bool have_one = false; | |
2936 while (iter.next()) { | |
2937 have_one = true; | |
2938 switch (iter.type()) { | |
2939 case relocInfo::none: return "no_reloc"; | |
2940 case relocInfo::oop_type: { | |
2941 stringStream st; | |
2942 oop_Relocation* r = iter.oop_reloc(); | |
2943 oop obj = r->oop_value(); | |
2944 st.print("oop("); | |
2945 if (obj == NULL) st.print("NULL"); | |
2946 else obj->print_value_on(&st); | |
2947 st.print(")"); | |
2948 return st.as_string(); | |
2949 } | |
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2950 case relocInfo::metadata_type: { |
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|
2951 stringStream st; |
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|
2952 metadata_Relocation* r = iter.metadata_reloc(); |
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diff
changeset
|
2953 Metadata* obj = r->metadata_value(); |
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diff
changeset
|
2954 st.print("metadata("); |
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diff
changeset
|
2955 if (obj == NULL) st.print("NULL"); |
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diff
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|
2956 else obj->print_value_on(&st); |
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diff
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|
2957 st.print(")"); |
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diff
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|
2958 return st.as_string(); |
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diff
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|
2959 } |
0 | 2960 case relocInfo::virtual_call_type: return "virtual_call"; |
2961 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2962 case relocInfo::static_call_type: return "static_call"; | |
2963 case relocInfo::static_stub_type: return "static_stub"; | |
2964 case relocInfo::runtime_call_type: return "runtime_call"; | |
2965 case relocInfo::external_word_type: return "external_word"; | |
2966 case relocInfo::internal_word_type: return "internal_word"; | |
2967 case relocInfo::section_word_type: return "section_word"; | |
2968 case relocInfo::poll_type: return "poll"; | |
2969 case relocInfo::poll_return_type: return "poll_return"; | |
2970 case relocInfo::type_mask: return "type_bit_mask"; | |
2971 } | |
2972 } | |
2973 return have_one ? "other" : NULL; | |
2974 } | |
2975 | |
2976 // Return a the last scope in (begin..end] | |
2977 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2978 PcDesc* p = pc_desc_near(begin+1); | |
2979 if (p != NULL && p->real_pc(this) <= end) { | |
2980 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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1250
diff
changeset
|
2981 p->obj_decode_offset(), p->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2982 p->return_oop()); |
0 | 2983 } |
2984 return NULL; | |
2985 } | |
2986 | |
6796
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6792
diff
changeset
|
2987 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { |
1155
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diff
changeset
|
2988 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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diff
changeset
|
2989 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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diff
changeset
|
2990 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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diff
changeset
|
2991 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2992 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2993 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2994 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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1644
diff
changeset
|
2995 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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1644
diff
changeset
|
2996 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2997 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
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diff
changeset
|
2998 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2999 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3000 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
|
3001 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
3002 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3003 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
3004 stream->cr(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3005 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3006 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
|
3007 ResourceMark rm; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3008 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
|
3009 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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jrose
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1141
diff
changeset
|
3010 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
3011 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3012 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3013 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3014 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3015 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
3016 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3017 sig_bt[sig_index++] = t; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3018 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
3019 sig_bt[sig_index++] = T_VOID; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3020 } else { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3021 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3022 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3023 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3024 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3025 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3026 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3027 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3028 int stack_slot_offset = this->frame_size() * wordSize; |
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diff
changeset
|
3029 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3030 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3031 int arg_index = (m->is_static() ? 0 : -1); |
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diff
changeset
|
3032 bool did_old_sp = false; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3033 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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diff
changeset
|
3034 bool at_this = (arg_index == -1); |
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diff
changeset
|
3035 bool at_old_sp = false; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3036 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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diff
changeset
|
3037 assert(t == sig_bt[sig_index], "sigs in sync"); |
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diff
changeset
|
3038 if (at_this) |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3039 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3040 else |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3041 stream->print(" # parm%d: ", arg_index); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3042 stream->move_to(tab1); |
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diff
changeset
|
3043 VMReg fst = regs[sig_index].first(); |
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diff
changeset
|
3044 VMReg snd = regs[sig_index].second(); |
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1141
diff
changeset
|
3045 if (fst->is_reg()) { |
4e6abf09f540
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1141
diff
changeset
|
3046 stream->print("%s", fst->name()); |
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diff
changeset
|
3047 if (snd->is_valid()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3048 stream->print(":%s", snd->name()); |
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diff
changeset
|
3049 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3050 } else if (fst->is_stack()) { |
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diff
changeset
|
3051 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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diff
changeset
|
3052 if (offset == stack_slot_offset) at_old_sp = true; |
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diff
changeset
|
3053 stream->print("[%s+0x%x]", spname, offset); |
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diff
changeset
|
3054 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3055 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
3056 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
3057 stream->print(" "); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
3058 stream->move_to(tab2); |
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diff
changeset
|
3059 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3060 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
3061 m->method_holder()->print_value_on(stream); |
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|
3062 } else { |
4e6abf09f540
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diff
changeset
|
3063 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3064 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2142
diff
changeset
|
3065 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
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3066 if (name != NULL) { |
4e6abf09f540
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diff
changeset
|
3067 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
3068 did_name = true; |
4e6abf09f540
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1141
diff
changeset
|
3069 } |
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1141
diff
changeset
|
3070 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3071 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3072 stream->print("%s", type2name(t)); |
4e6abf09f540
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diff
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|
3073 } |
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diff
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|
3074 if (at_old_sp) { |
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diff
changeset
|
3075 stream->print(" (%s of caller)", spname); |
4e6abf09f540
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diff
changeset
|
3076 did_old_sp = true; |
4e6abf09f540
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diff
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|
3077 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
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|
3078 stream->cr(); |
4e6abf09f540
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diff
changeset
|
3079 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3080 arg_index += 1; |
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diff
changeset
|
3081 if (!at_this) ss.next(); |
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diff
changeset
|
3082 } |
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diff
changeset
|
3083 if (!did_old_sp) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3084 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
3085 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3086 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
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1141
diff
changeset
|
3087 stream->print(" (%s of caller)", spname); |
4e6abf09f540
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diff
changeset
|
3088 stream->cr(); |
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diff
changeset
|
3089 } |
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diff
changeset
|
3090 } |
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diff
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|
3091 } |
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|
3092 } |
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|
3093 |
0 | 3094 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
3095 // First, find an oopmap in (begin, end]. | |
3096 // We use the odd half-closed interval so that oop maps and scope descs | |
3097 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 3098 address base = code_begin(); |
0 | 3099 OopMapSet* oms = oop_maps(); |
3100 if (oms != NULL) { | |
3101 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
3102 OopMap* om = oms->at(i); | |
3103 address pc = base + om->offset(); | |
3104 if (pc > begin) { | |
3105 if (pc <= end) { | |
100
c7c777385a15
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diff
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|
3106 st->move_to(column); |
c7c777385a15
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diff
changeset
|
3107 st->print("; "); |
c7c777385a15
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diff
changeset
|
3108 om->print_on(st); |
0 | 3109 } |
3110 break; | |
3111 } | |
3112 } | |
3113 } | |
100
c7c777385a15
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diff
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|
3114 |
c7c777385a15
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diff
changeset
|
3115 // Print any debug info present at this pc. |
0 | 3116 ScopeDesc* sd = scope_desc_in(begin, end); |
3117 if (sd != NULL) { | |
100
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diff
changeset
|
3118 st->move_to(column); |
0 | 3119 if (sd->bci() == SynchronizationEntryBCI) { |
3120 st->print(";*synchronization entry"); | |
3121 } else { | |
6725
da91efe96a93
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diff
changeset
|
3122 if (sd->method() == NULL) { |
100
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diff
changeset
|
3123 st->print("method is NULL"); |
0 | 3124 } else if (sd->method()->is_native()) { |
100
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diff
changeset
|
3125 st->print("method is native"); |
0 | 3126 } else { |
2142 | 3127 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 3128 st->print(";*%s", Bytecodes::name(bc)); |
3129 switch (bc) { | |
3130 case Bytecodes::_invokevirtual: | |
3131 case Bytecodes::_invokespecial: | |
3132 case Bytecodes::_invokestatic: | |
3133 case Bytecodes::_invokeinterface: | |
3134 { | |
2142 | 3135 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 3136 st->print(" "); |
2142 | 3137 if (invoke.name() != NULL) |
3138 invoke.name()->print_symbol_on(st); | |
0 | 3139 else |
3140 st->print("<UNKNOWN>"); | |
3141 break; | |
3142 } | |
3143 case Bytecodes::_getfield: | |
3144 case Bytecodes::_putfield: | |
3145 case Bytecodes::_getstatic: | |
3146 case Bytecodes::_putstatic: | |
3147 { | |
2142 | 3148 Bytecode_field field(sd->method(), sd->bci()); |
0 | 3149 st->print(" "); |
2142 | 3150 if (field.name() != NULL) |
3151 field.name()->print_symbol_on(st); | |
0 | 3152 else |
3153 st->print("<UNKNOWN>"); | |
3154 } | |
3155 } | |
3156 } | |
3157 } | |
100
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parents:
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diff
changeset
|
3158 |
0 | 3159 // Print all scopes |
3160 for (;sd != NULL; sd = sd->sender()) { | |
100
c7c777385a15
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diff
changeset
|
3161 st->move_to(column); |
0 | 3162 st->print("; -"); |
6725
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diff
changeset
|
3163 if (sd->method() == NULL) { |
100
c7c777385a15
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diff
changeset
|
3164 st->print("method is NULL"); |
0 | 3165 } else { |
3166 sd->method()->print_short_name(st); | |
3167 } | |
3168 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
3169 if (lineno != -1) { | |
3170 st->print("@%d (line %d)", sd->bci(), lineno); | |
3171 } else { | |
3172 st->print("@%d", sd->bci()); | |
3173 } | |
3174 st->cr(); | |
3175 } | |
3176 } | |
3177 | |
3178 // Print relocation information | |
3179 const char* str = reloc_string_for(begin, end); | |
3180 if (str != NULL) { | |
3181 if (sd != NULL) st->cr(); | |
100
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diff
changeset
|
3182 st->move_to(column); |
0 | 3183 st->print("; {%s}", str); |
3184 } | |
1748 | 3185 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 3186 if (cont_offset != 0) { |
100
c7c777385a15
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diff
changeset
|
3187 st->move_to(column); |
1748 | 3188 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 3189 } |
3190 | |
3191 } | |
3192 | |
100
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diff
changeset
|
3193 #ifndef PRODUCT |
c7c777385a15
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diff
changeset
|
3194 |
0 | 3195 void nmethod::print_value_on(outputStream* st) const { |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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2376
diff
changeset
|
3196 st->print("nmethod"); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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2376
diff
changeset
|
3197 print_on(st, NULL); |
0 | 3198 } |
3199 | |
3200 void nmethod::print_calls(outputStream* st) { | |
3201 RelocIterator iter(this); | |
3202 while (iter.next()) { | |
3203 switch (iter.type()) { | |
3204 case relocInfo::virtual_call_type: | |
3205 case relocInfo::opt_virtual_call_type: { | |
3206 VerifyMutexLocker mc(CompiledIC_lock); | |
20277
882004b9e7e1
8047362: Add a version of CompiledIC_at that doesn't create a new RelocIterator
stefank
parents:
20269
diff
changeset
|
3207 CompiledIC_at(&iter)->print(); |
0 | 3208 break; |
3209 } | |
3210 case relocInfo::static_call_type: | |
3211 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
3212 compiledStaticCall_at(iter.reloc())->print(); | |
3213 break; | |
3214 } | |
3215 } | |
3216 } | |
3217 | |
3218 void nmethod::print_handler_table() { | |
3219 ExceptionHandlerTable(this).print(); | |
3220 } | |
3221 | |
3222 void nmethod::print_nul_chk_table() { | |
1748 | 3223 ImplicitExceptionTable(this).print(code_begin()); |
0 | 3224 } |
3225 | |
3226 void nmethod::print_statistics() { | |
3227 ttyLocker ttyl; | |
3228 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
3229 nmethod_stats.print_native_nmethod_stats(); | |
3230 nmethod_stats.print_nmethod_stats(); | |
3231 DebugInformationRecorder::print_statistics(); | |
3232 nmethod_stats.print_pc_stats(); | |
3233 Dependencies::print_statistics(); | |
3234 if (xtty != NULL) xtty->tail("statistics"); | |
3235 } | |
3236 | |
3237 #endif // PRODUCT |