Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.cpp @ 6790:2cb2f30450c7
7196262: JSR 292: java/lang/invoke/PrivateInvokeTest.java fails on solaris-sparc
Reviewed-by: kvn, jrose, bdelsart
author | twisti |
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date | Mon, 17 Sep 2012 12:57:58 -0700 |
parents | da91efe96a93 |
children | 137868b7aa6f |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/codeCache.hpp" | |
27 #include "code/compiledIC.hpp" | |
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28 #include "code/dependencies.hpp" |
1972 | 29 #include "code/nmethod.hpp" |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
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32 #include "compiler/compileBroker.hpp" |
1972 | 33 #include "compiler/compileLog.hpp" |
34 #include "compiler/compilerOracle.hpp" | |
35 #include "compiler/disassembler.hpp" | |
36 #include "interpreter/bytecode.hpp" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
1972 | 40 #include "runtime/sharedRuntime.hpp" |
41 #include "runtime/sweeper.hpp" | |
42 #include "utilities/dtrace.hpp" | |
43 #include "utilities/events.hpp" | |
44 #include "utilities/xmlstream.hpp" | |
45 #ifdef SHARK | |
46 #include "shark/sharkCompiler.hpp" | |
47 #endif | |
0 | 48 |
49 #ifdef DTRACE_ENABLED | |
50 | |
51 // Only bother with this argument setup if dtrace is available | |
52 | |
4006 | 53 #ifndef USDT2 |
0 | 54 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
55 const char*, int, const char*, int, const char*, int, void*, size_t); | |
56 | |
57 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
58 char*, int, char*, int, char*, int); | |
59 | |
60 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
61 { \ | |
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62 Method* m = (method); \ |
0 | 63 if (m != NULL) { \ |
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64 Symbol* klass_name = m->klass_name(); \ |
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65 Symbol* name = m->name(); \ |
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66 Symbol* signature = m->signature(); \ |
0 | 67 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
68 klass_name->bytes(), klass_name->utf8_length(), \ | |
69 name->bytes(), name->utf8_length(), \ | |
70 signature->bytes(), signature->utf8_length()); \ | |
71 } \ | |
72 } | |
4006 | 73 #else /* USDT2 */ |
74 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
75 { \ | |
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76 Method* m = (method); \ |
4006 | 77 if (m != NULL) { \ |
78 Symbol* klass_name = m->klass_name(); \ | |
79 Symbol* name = m->name(); \ | |
80 Symbol* signature = m->signature(); \ | |
81 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
82 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
83 (char *) name->bytes(), name->utf8_length(), \ | |
84 (char *) signature->bytes(), signature->utf8_length()); \ | |
85 } \ | |
86 } | |
87 #endif /* USDT2 */ | |
0 | 88 |
89 #else // ndef DTRACE_ENABLED | |
90 | |
91 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
92 | |
93 #endif | |
94 | |
95 bool nmethod::is_compiled_by_c1() const { | |
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96 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 97 if (is_native_method()) return false; |
98 return compiler()->is_c1(); | |
99 } | |
100 bool nmethod::is_compiled_by_c2() const { | |
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101 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 102 if (is_native_method()) return false; |
103 return compiler()->is_c2(); | |
104 } | |
1692 | 105 bool nmethod::is_compiled_by_shark() const { |
106 if (is_native_method()) return false; | |
107 assert(compiler() != NULL, "must be"); | |
108 return compiler()->is_shark(); | |
109 } | |
0 | 110 |
111 | |
112 | |
113 //--------------------------------------------------------------------------------- | |
114 // NMethod statistics | |
115 // They are printed under various flags, including: | |
116 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
117 // (In the latter two cases, they like other stats are printed to the log only.) | |
118 | |
119 #ifndef PRODUCT | |
120 // These variables are put into one block to reduce relocations | |
121 // and make it simpler to print from the debugger. | |
122 static | |
123 struct nmethod_stats_struct { | |
124 int nmethod_count; | |
125 int total_size; | |
126 int relocation_size; | |
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127 int consts_size; |
1748 | 128 int insts_size; |
0 | 129 int stub_size; |
130 int scopes_data_size; | |
131 int scopes_pcs_size; | |
132 int dependencies_size; | |
133 int handler_table_size; | |
134 int nul_chk_table_size; | |
135 int oops_size; | |
136 | |
137 void note_nmethod(nmethod* nm) { | |
138 nmethod_count += 1; | |
139 total_size += nm->size(); | |
140 relocation_size += nm->relocation_size(); | |
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141 consts_size += nm->consts_size(); |
1748 | 142 insts_size += nm->insts_size(); |
0 | 143 stub_size += nm->stub_size(); |
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144 oops_size += nm->oops_size(); |
0 | 145 scopes_data_size += nm->scopes_data_size(); |
146 scopes_pcs_size += nm->scopes_pcs_size(); | |
147 dependencies_size += nm->dependencies_size(); | |
148 handler_table_size += nm->handler_table_size(); | |
149 nul_chk_table_size += nm->nul_chk_table_size(); | |
150 } | |
151 void print_nmethod_stats() { | |
152 if (nmethod_count == 0) return; | |
153 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
154 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
155 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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156 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 157 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 158 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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159 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 160 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
161 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
162 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
163 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
164 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
165 } | |
166 | |
167 int native_nmethod_count; | |
168 int native_total_size; | |
169 int native_relocation_size; | |
1748 | 170 int native_insts_size; |
0 | 171 int native_oops_size; |
172 void note_native_nmethod(nmethod* nm) { | |
173 native_nmethod_count += 1; | |
174 native_total_size += nm->size(); | |
175 native_relocation_size += nm->relocation_size(); | |
1748 | 176 native_insts_size += nm->insts_size(); |
0 | 177 native_oops_size += nm->oops_size(); |
178 } | |
179 void print_native_nmethod_stats() { | |
180 if (native_nmethod_count == 0) return; | |
181 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
182 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
183 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 184 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 185 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
186 } | |
187 | |
188 int pc_desc_resets; // number of resets (= number of caches) | |
189 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
190 int pc_desc_approx; // number of those which have approximate true | |
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191 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 192 int pc_desc_hits; // number of LRU cache hits |
193 int pc_desc_tests; // total number of PcDesc examinations | |
194 int pc_desc_searches; // total number of quasi-binary search steps | |
195 int pc_desc_adds; // number of LUR cache insertions | |
196 | |
197 void print_pc_stats() { | |
198 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
199 pc_desc_queries, | |
200 (double)(pc_desc_tests + pc_desc_searches) | |
201 / pc_desc_queries); | |
202 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
203 pc_desc_resets, | |
204 pc_desc_queries, pc_desc_approx, | |
205 pc_desc_repeats, pc_desc_hits, | |
206 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
207 } | |
208 } nmethod_stats; | |
209 #endif //PRODUCT | |
210 | |
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211 |
0 | 212 //--------------------------------------------------------------------------------- |
213 | |
214 | |
215 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
216 assert(pc != NULL, "Must be non null"); | |
217 assert(exception.not_null(), "Must be non null"); | |
218 assert(handler != NULL, "Must be non null"); | |
219 | |
220 _count = 0; | |
221 _exception_type = exception->klass(); | |
222 _next = NULL; | |
223 | |
224 add_address_and_handler(pc,handler); | |
225 } | |
226 | |
227 | |
228 address ExceptionCache::match(Handle exception, address pc) { | |
229 assert(pc != NULL,"Must be non null"); | |
230 assert(exception.not_null(),"Must be non null"); | |
231 if (exception->klass() == exception_type()) { | |
232 return (test_address(pc)); | |
233 } | |
234 | |
235 return NULL; | |
236 } | |
237 | |
238 | |
239 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
240 assert(exception.not_null(),"Must be non null"); | |
241 if (exception->klass() == exception_type() && count() < cache_size) { | |
242 return true; | |
243 } | |
244 return false; | |
245 } | |
246 | |
247 | |
248 address ExceptionCache::test_address(address addr) { | |
249 for (int i=0; i<count(); i++) { | |
250 if (pc_at(i) == addr) { | |
251 return handler_at(i); | |
252 } | |
253 } | |
254 return NULL; | |
255 } | |
256 | |
257 | |
258 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
259 if (test_address(addr) == handler) return true; | |
260 if (count() < cache_size) { | |
261 set_pc_at(count(),addr); | |
262 set_handler_at(count(), handler); | |
263 increment_count(); | |
264 return true; | |
265 } | |
266 return false; | |
267 } | |
268 | |
269 | |
270 // private method for handling exception cache | |
271 // These methods are private, and used to manipulate the exception cache | |
272 // directly. | |
273 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
274 ExceptionCache* ec = exception_cache(); | |
275 while (ec != NULL) { | |
276 if (ec->match_exception_with_space(exception)) { | |
277 return ec; | |
278 } | |
279 ec = ec->next(); | |
280 } | |
281 return NULL; | |
282 } | |
283 | |
284 | |
285 //----------------------------------------------------------------------------- | |
286 | |
287 | |
288 // Helper used by both find_pc_desc methods. | |
289 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
290 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
291 if (!approximate) | |
292 return pc->pc_offset() == pc_offset; | |
293 else | |
294 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
295 } | |
296 | |
297 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
298 if (initial_pc_desc == NULL) { | |
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299 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 300 return; |
301 } | |
302 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
303 // reset the cache by filling it with benign (non-null) values | |
304 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
305 for (int i = 0; i < cache_size; i++) | |
306 _pc_descs[i] = initial_pc_desc; | |
307 } | |
308 | |
309 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
310 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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311 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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312 |
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313 // Note: one might think that caching the most recently |
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314 // read value separately would be a win, but one would be |
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315 // wrong. When many threads are updating it, the cache |
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316 // line it's in would bounce between caches, negating |
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317 // any benefit. |
0 | 318 |
319 // In order to prevent race conditions do not load cache elements | |
320 // repeatedly, but use a local copy: | |
321 PcDesc* res; | |
322 | |
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323 // Step one: Check the most recently added value. |
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324 res = _pc_descs[0]; |
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325 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 326 if (match_desc(res, pc_offset, approximate)) { |
327 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
328 return res; | |
329 } | |
330 | |
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331 // Step two: Check the rest of the LRU cache. |
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332 for (int i = 1; i < cache_size; ++i) { |
0 | 333 res = _pc_descs[i]; |
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334 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 335 if (match_desc(res, pc_offset, approximate)) { |
336 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
337 return res; | |
338 } | |
339 } | |
340 | |
341 // Report failure. | |
342 return NULL; | |
343 } | |
344 | |
345 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
346 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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347 // Update the LRU cache by shifting pc_desc forward. |
0 | 348 for (int i = 0; i < cache_size; i++) { |
349 PcDesc* next = _pc_descs[i]; | |
350 _pc_descs[i] = pc_desc; | |
351 pc_desc = next; | |
352 } | |
353 } | |
354 | |
355 // adjust pcs_size so that it is a multiple of both oopSize and | |
356 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
357 // of oopSize, then 2*sizeof(PcDesc) is) | |
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358 static int adjust_pcs_size(int pcs_size) { |
0 | 359 int nsize = round_to(pcs_size, oopSize); |
360 if ((nsize % sizeof(PcDesc)) != 0) { | |
361 nsize = pcs_size + sizeof(PcDesc); | |
362 } | |
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363 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 364 return nsize; |
365 } | |
366 | |
367 //----------------------------------------------------------------------------- | |
368 | |
369 | |
370 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
371 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
372 assert(new_entry != NULL,"Must be non null"); | |
373 assert(new_entry->next() == NULL, "Must be null"); | |
374 | |
375 if (exception_cache() != NULL) { | |
376 new_entry->set_next(exception_cache()); | |
377 } | |
378 set_exception_cache(new_entry); | |
379 } | |
380 | |
381 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
382 ExceptionCache* prev = NULL; | |
383 ExceptionCache* curr = exception_cache(); | |
384 assert(curr != NULL, "nothing to remove"); | |
385 // find the previous and next entry of ec | |
386 while (curr != ec) { | |
387 prev = curr; | |
388 curr = curr->next(); | |
389 assert(curr != NULL, "ExceptionCache not found"); | |
390 } | |
391 // now: curr == ec | |
392 ExceptionCache* next = curr->next(); | |
393 if (prev == NULL) { | |
394 set_exception_cache(next); | |
395 } else { | |
396 prev->set_next(next); | |
397 } | |
398 delete curr; | |
399 } | |
400 | |
401 | |
402 // public method for accessing the exception cache | |
403 // These are the public access methods. | |
404 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
405 // We never grab a lock to read the exception cache, so we may | |
406 // have false negatives. This is okay, as it can only happen during | |
407 // the first few exception lookups for a given nmethod. | |
408 ExceptionCache* ec = exception_cache(); | |
409 while (ec != NULL) { | |
410 address ret_val; | |
411 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
412 return ret_val; | |
413 } | |
414 ec = ec->next(); | |
415 } | |
416 return NULL; | |
417 } | |
418 | |
419 | |
420 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
421 // There are potential race conditions during exception cache updates, so we | |
422 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 423 // we don't lock during reads, it is possible to have several threads attempt |
0 | 424 // to update the cache with the same data. We need to check for already inserted |
425 // copies of the current data before adding it. | |
426 | |
427 MutexLocker ml(ExceptionCache_lock); | |
428 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
429 | |
430 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
431 target_entry = new ExceptionCache(exception,pc,handler); | |
432 add_exception_cache_entry(target_entry); | |
433 } | |
434 } | |
435 | |
436 | |
437 //-------------end of code for ExceptionCache-------------- | |
438 | |
439 | |
440 int nmethod::total_size() const { | |
441 return | |
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442 consts_size() + |
1748 | 443 insts_size() + |
0 | 444 stub_size() + |
445 scopes_data_size() + | |
446 scopes_pcs_size() + | |
447 handler_table_size() + | |
448 nul_chk_table_size(); | |
449 } | |
450 | |
451 const char* nmethod::compile_kind() const { | |
452 if (is_osr_method()) return "osr"; | |
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453 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 454 return NULL; |
455 } | |
456 | |
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457 // Fill in default values for various flag fields |
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458 void nmethod::init_defaults() { |
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459 _state = alive; |
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460 _marked_for_reclamation = 0; |
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461 _has_flushed_dependencies = 0; |
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462 _speculatively_disconnected = 0; |
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463 _has_unsafe_access = 0; |
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464 _has_method_handle_invokes = 0; |
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465 _lazy_critical_native = 0; |
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466 _marked_for_deoptimization = 0; |
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467 _lock_count = 0; |
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468 _stack_traversal_mark = 0; |
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469 _unload_reported = false; // jvmti state |
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470 |
1726 | 471 #ifdef ASSERT |
472 _oops_are_stale = false; | |
473 #endif | |
474 | |
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475 _oops_do_mark_link = NULL; |
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476 _jmethod_id = NULL; |
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477 _osr_link = NULL; |
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478 _scavenge_root_link = NULL; |
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479 _scavenge_root_state = 0; |
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480 _saved_nmethod_link = NULL; |
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481 _compiler = NULL; |
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482 |
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483 #ifdef HAVE_DTRACE_H |
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484 _trap_offset = 0; |
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485 #endif // def HAVE_DTRACE_H |
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486 } |
0 | 487 |
488 | |
489 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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490 int compile_id, |
0 | 491 CodeBuffer *code_buffer, |
492 int vep_offset, | |
493 int frame_complete, | |
494 int frame_size, | |
495 ByteSize basic_lock_owner_sp_offset, | |
496 ByteSize basic_lock_sp_offset, | |
497 OopMapSet* oop_maps) { | |
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498 code_buffer->finalize_oop_references(method); |
0 | 499 // create nmethod |
500 nmethod* nm = NULL; | |
501 { | |
502 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
503 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
504 CodeOffsets offsets; | |
505 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
506 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
507 nm = new (native_nmethod_size) | |
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508 nmethod(method(), native_nmethod_size, compile_id, &offsets, |
0 | 509 code_buffer, frame_size, |
510 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
511 oop_maps); | |
512 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
513 if (PrintAssembly && nm != NULL) | |
514 Disassembler::decode(nm); | |
515 } | |
516 // verify nmethod | |
517 debug_only(if (nm) nm->verify();) // might block | |
518 | |
519 if (nm != NULL) { | |
520 nm->log_new_nmethod(); | |
521 } | |
522 | |
523 return nm; | |
524 } | |
525 | |
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526 #ifdef HAVE_DTRACE_H |
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527 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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528 CodeBuffer *code_buffer, |
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529 int vep_offset, |
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530 int trap_offset, |
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531 int frame_complete, |
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532 int frame_size) { |
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533 code_buffer->finalize_oop_references(method); |
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534 // create nmethod |
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535 nmethod* nm = NULL; |
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536 { |
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537 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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538 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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539 CodeOffsets offsets; |
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540 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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541 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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542 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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543 |
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544 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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545 |
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546 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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547 if (PrintAssembly && nm != NULL) |
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548 Disassembler::decode(nm); |
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549 } |
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550 // verify nmethod |
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551 debug_only(if (nm) nm->verify();) // might block |
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552 |
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553 if (nm != NULL) { |
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554 nm->log_new_nmethod(); |
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555 } |
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556 |
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557 return nm; |
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558 } |
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559 |
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560 #endif // def HAVE_DTRACE_H |
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561 |
0 | 562 nmethod* nmethod::new_nmethod(methodHandle method, |
563 int compile_id, | |
564 int entry_bci, | |
565 CodeOffsets* offsets, | |
566 int orig_pc_offset, | |
567 DebugInformationRecorder* debug_info, | |
568 Dependencies* dependencies, | |
569 CodeBuffer* code_buffer, int frame_size, | |
570 OopMapSet* oop_maps, | |
571 ExceptionHandlerTable* handler_table, | |
572 ImplicitExceptionTable* nul_chk_table, | |
573 AbstractCompiler* compiler, | |
574 int comp_level | |
575 ) | |
576 { | |
577 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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578 code_buffer->finalize_oop_references(method); |
0 | 579 // create nmethod |
580 nmethod* nm = NULL; | |
581 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
582 int nmethod_size = | |
583 allocation_size(code_buffer, sizeof(nmethod)) | |
584 + adjust_pcs_size(debug_info->pcs_size()) | |
585 + round_to(dependencies->size_in_bytes() , oopSize) | |
586 + round_to(handler_table->size_in_bytes(), oopSize) | |
587 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
588 + round_to(debug_info->data_size() , oopSize); | |
589 nm = new (nmethod_size) | |
590 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
591 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
592 oop_maps, | |
593 handler_table, | |
594 nul_chk_table, | |
595 compiler, | |
596 comp_level); | |
597 if (nm != NULL) { | |
598 // To make dependency checking during class loading fast, record | |
599 // the nmethod dependencies in the classes it is dependent on. | |
600 // This allows the dependency checking code to simply walk the | |
601 // class hierarchy above the loaded class, checking only nmethods | |
602 // which are dependent on those classes. The slow way is to | |
603 // check every nmethod for dependencies which makes it linear in | |
604 // the number of methods compiled. For applications with a lot | |
605 // classes the slow way is too slow. | |
606 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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607 Klass* klass = deps.context_type(); |
0 | 608 if (klass == NULL) continue; // ignore things like evol_method |
609 | |
610 // record this nmethod as dependent on this klass | |
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611 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 612 } |
613 } | |
614 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
615 if (PrintAssembly && nm != NULL) | |
616 Disassembler::decode(nm); | |
617 } | |
618 | |
619 // verify nmethod | |
620 debug_only(if (nm) nm->verify();) // might block | |
621 | |
622 if (nm != NULL) { | |
623 nm->log_new_nmethod(); | |
624 } | |
625 | |
626 // done | |
627 return nm; | |
628 } | |
629 | |
630 | |
631 // For native wrappers | |
632 nmethod::nmethod( | |
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633 Method* method, |
0 | 634 int nmethod_size, |
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635 int compile_id, |
0 | 636 CodeOffsets* offsets, |
637 CodeBuffer* code_buffer, | |
638 int frame_size, | |
639 ByteSize basic_lock_owner_sp_offset, | |
640 ByteSize basic_lock_sp_offset, | |
641 OopMapSet* oop_maps ) | |
642 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
643 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 644 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
645 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 646 { |
647 { | |
648 debug_only(No_Safepoint_Verifier nsv;) | |
649 assert_locked_or_safepoint(CodeCache_lock); | |
650 | |
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651 init_defaults(); |
0 | 652 _method = method; |
653 _entry_bci = InvocationEntryBci; | |
654 // We have no exception handler or deopt handler make the | |
655 // values something that will never match a pc like the nmethod vtable entry | |
656 _exception_offset = 0; | |
657 _deoptimize_offset = 0; | |
1204 | 658 _deoptimize_mh_offset = 0; |
0 | 659 _orig_pc_offset = 0; |
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660 |
1748 | 661 _consts_offset = data_offset(); |
0 | 662 _stub_offset = data_offset(); |
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663 _oops_offset = data_offset(); |
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664 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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665 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 666 _scopes_pcs_offset = _scopes_data_offset; |
667 _dependencies_offset = _scopes_pcs_offset; | |
668 _handler_table_offset = _dependencies_offset; | |
669 _nul_chk_table_offset = _handler_table_offset; | |
670 _nmethod_end_offset = _nul_chk_table_offset; | |
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671 _compile_id = compile_id; |
0 | 672 _comp_level = CompLevel_none; |
1748 | 673 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
674 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 675 _osr_entry_point = NULL; |
676 _exception_cache = NULL; | |
677 _pc_desc_cache.reset_to(NULL); | |
678 | |
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679 code_buffer->copy_values_to(this); |
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680 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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681 CodeCache::add_scavenge_root_nmethod(this); |
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682 } |
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683 debug_only(verify_scavenge_root_oops()); |
0 | 684 CodeCache::commit(this); |
685 } | |
686 | |
687 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
688 ttyLocker ttyl; // keep the following output all in one block | |
689 // This output goes directly to the tty, not the compiler log. | |
690 // To enable tools to match it up with the compilation activity, | |
691 // be sure to tag this tty output with the compile ID. | |
692 if (xtty != NULL) { | |
693 xtty->begin_head("print_native_nmethod"); | |
694 xtty->method(_method); | |
695 xtty->stamp(); | |
696 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
697 } | |
698 // print the header part first | |
699 print(); | |
700 // then print the requested information | |
701 if (PrintNativeNMethods) { | |
702 print_code(); | |
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703 if (oop_maps != NULL) { |
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704 oop_maps->print(); |
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705 } |
0 | 706 } |
707 if (PrintRelocations) { | |
708 print_relocations(); | |
709 } | |
710 if (xtty != NULL) { | |
711 xtty->tail("print_native_nmethod"); | |
712 } | |
713 } | |
714 } | |
715 | |
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716 // For dtrace wrappers |
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717 #ifdef HAVE_DTRACE_H |
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718 nmethod::nmethod( |
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719 Method* method, |
116
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720 int nmethod_size, |
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721 CodeOffsets* offsets, |
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722 CodeBuffer* code_buffer, |
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723 int frame_size) |
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724 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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725 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 726 _native_receiver_sp_offset(in_ByteSize(-1)), |
727 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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728 { |
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729 { |
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730 debug_only(No_Safepoint_Verifier nsv;) |
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731 assert_locked_or_safepoint(CodeCache_lock); |
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732 |
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733 init_defaults(); |
116
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734 _method = method; |
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735 _entry_bci = InvocationEntryBci; |
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736 // We have no exception handler or deopt handler make the |
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737 // values something that will never match a pc like the nmethod vtable entry |
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738 _exception_offset = 0; |
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739 _deoptimize_offset = 0; |
1204 | 740 _deoptimize_mh_offset = 0; |
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741 _unwind_handler_offset = -1; |
116
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742 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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743 _orig_pc_offset = 0; |
1748 | 744 _consts_offset = data_offset(); |
116
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745 _stub_offset = data_offset(); |
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746 _oops_offset = data_offset(); |
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747 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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748 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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749 _scopes_pcs_offset = _scopes_data_offset; |
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750 _dependencies_offset = _scopes_pcs_offset; |
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751 _handler_table_offset = _dependencies_offset; |
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752 _nul_chk_table_offset = _handler_table_offset; |
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753 _nmethod_end_offset = _nul_chk_table_offset; |
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754 _compile_id = 0; // default |
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755 _comp_level = CompLevel_none; |
1748 | 756 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
757 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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758 _osr_entry_point = NULL; |
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759 _exception_cache = NULL; |
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760 _pc_desc_cache.reset_to(NULL); |
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761 |
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762 code_buffer->copy_values_to(this); |
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763 debug_only(verify_scavenge_root_oops()); |
116
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764 CodeCache::commit(this); |
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765 } |
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766 |
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767 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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768 ttyLocker ttyl; // keep the following output all in one block |
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769 // This output goes directly to the tty, not the compiler log. |
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770 // To enable tools to match it up with the compilation activity, |
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771 // be sure to tag this tty output with the compile ID. |
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772 if (xtty != NULL) { |
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773 xtty->begin_head("print_dtrace_nmethod"); |
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774 xtty->method(_method); |
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775 xtty->stamp(); |
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776 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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777 } |
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778 // print the header part first |
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779 print(); |
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780 // then print the requested information |
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781 if (PrintNMethods) { |
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782 print_code(); |
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783 } |
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784 if (PrintRelocations) { |
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785 print_relocations(); |
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786 } |
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787 if (xtty != NULL) { |
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788 xtty->tail("print_dtrace_nmethod"); |
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789 } |
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790 } |
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791 } |
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792 #endif // def HAVE_DTRACE_H |
0 | 793 |
794 void* nmethod::operator new(size_t size, int nmethod_size) { | |
795 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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796 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 797 return CodeCache::allocate(nmethod_size); |
798 } | |
799 | |
800 | |
801 nmethod::nmethod( | |
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802 Method* method, |
0 | 803 int nmethod_size, |
804 int compile_id, | |
805 int entry_bci, | |
806 CodeOffsets* offsets, | |
807 int orig_pc_offset, | |
808 DebugInformationRecorder* debug_info, | |
809 Dependencies* dependencies, | |
810 CodeBuffer *code_buffer, | |
811 int frame_size, | |
812 OopMapSet* oop_maps, | |
813 ExceptionHandlerTable* handler_table, | |
814 ImplicitExceptionTable* nul_chk_table, | |
815 AbstractCompiler* compiler, | |
816 int comp_level | |
817 ) | |
818 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
819 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 820 _native_receiver_sp_offset(in_ByteSize(-1)), |
821 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 822 { |
823 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
824 { | |
825 debug_only(No_Safepoint_Verifier nsv;) | |
826 assert_locked_or_safepoint(CodeCache_lock); | |
827 | |
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828 init_defaults(); |
0 | 829 _method = method; |
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830 _entry_bci = entry_bci; |
0 | 831 _compile_id = compile_id; |
832 _comp_level = comp_level; | |
833 _compiler = compiler; | |
834 _orig_pc_offset = orig_pc_offset; | |
1748 | 835 |
836 // Section offsets | |
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837 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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838 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 839 |
840 // Exception handler and deopt handler are in the stub section | |
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841 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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842 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 843 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
844 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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845 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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846 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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847 } else { |
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848 _deoptimize_mh_offset = -1; |
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849 } |
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850 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 851 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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852 } else { |
1748 | 853 _unwind_handler_offset = -1; |
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854 } |
1748 | 855 |
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856 _oops_offset = data_offset(); |
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857 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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858 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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859 |
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860 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 861 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
862 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
863 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
864 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
865 | |
1748 | 866 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
867 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
868 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 869 _exception_cache = NULL; |
870 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
871 | |
872 // Copy contents of ScopeDescRecorder to nmethod | |
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873 code_buffer->copy_values_to(this); |
0 | 874 debug_info->copy_to(this); |
875 dependencies->copy_to(this); | |
989
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876 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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877 CodeCache::add_scavenge_root_nmethod(this); |
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878 } |
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879 debug_only(verify_scavenge_root_oops()); |
0 | 880 |
881 CodeCache::commit(this); | |
882 | |
883 // Copy contents of ExceptionHandlerTable to nmethod | |
884 handler_table->copy_to(this); | |
885 nul_chk_table->copy_to(this); | |
886 | |
887 // we use the information of entry points to find out if a method is | |
888 // static or non static | |
889 assert(compiler->is_c2() || | |
890 _method->is_static() == (entry_point() == _verified_entry_point), | |
891 " entry points must be same for static methods and vice versa"); | |
892 } | |
893 | |
100
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894 bool printnmethods = PrintNMethods |
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895 || CompilerOracle::should_print(_method) |
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896 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 897 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
898 print_nmethod(printnmethods); | |
899 } | |
900 } | |
901 | |
902 | |
903 // Print a short set of xml attributes to identify this nmethod. The | |
904 // output should be embedded in some other element. | |
905 void nmethod::log_identity(xmlStream* log) const { | |
906 log->print(" compile_id='%d'", compile_id()); | |
907 const char* nm_kind = compile_kind(); | |
908 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
909 if (compiler() != NULL) { | |
910 log->print(" compiler='%s'", compiler()->name()); | |
911 } | |
1783 | 912 if (TieredCompilation) { |
913 log->print(" level='%d'", comp_level()); | |
914 } | |
0 | 915 } |
916 | |
917 | |
918 #define LOG_OFFSET(log, name) \ | |
919 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
920 log->print(" " XSTR(name) "_offset='%d'" , \ | |
921 (intptr_t)name##_begin() - (intptr_t)this) | |
922 | |
923 | |
924 void nmethod::log_new_nmethod() const { | |
925 if (LogCompilation && xtty != NULL) { | |
926 ttyLocker ttyl; | |
927 HandleMark hm; | |
928 xtty->begin_elem("nmethod"); | |
929 log_identity(xtty); | |
1748 | 930 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 931 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
932 | |
933 LOG_OFFSET(xtty, relocation); | |
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934 LOG_OFFSET(xtty, consts); |
1748 | 935 LOG_OFFSET(xtty, insts); |
0 | 936 LOG_OFFSET(xtty, stub); |
937 LOG_OFFSET(xtty, scopes_data); | |
938 LOG_OFFSET(xtty, scopes_pcs); | |
939 LOG_OFFSET(xtty, dependencies); | |
940 LOG_OFFSET(xtty, handler_table); | |
941 LOG_OFFSET(xtty, nul_chk_table); | |
942 LOG_OFFSET(xtty, oops); | |
943 | |
944 xtty->method(method()); | |
945 xtty->stamp(); | |
946 xtty->end_elem(); | |
947 } | |
948 } | |
949 | |
950 #undef LOG_OFFSET | |
951 | |
952 | |
953 // Print out more verbose output usually for a newly created nmethod. | |
2405
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954 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 955 if (st != NULL) { |
956 ttyLocker ttyl; | |
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957 if (WizardMode) { |
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958 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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959 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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960 } else { |
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961 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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962 } |
0 | 963 } |
964 } | |
965 | |
966 | |
967 void nmethod::print_nmethod(bool printmethod) { | |
968 ttyLocker ttyl; // keep the following output all in one block | |
969 if (xtty != NULL) { | |
970 xtty->begin_head("print_nmethod"); | |
971 xtty->stamp(); | |
972 xtty->end_head(); | |
973 } | |
974 // print the header part first | |
975 print(); | |
976 // then print the requested information | |
977 if (printmethod) { | |
978 print_code(); | |
979 print_pcs(); | |
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980 if (oop_maps()) { |
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981 oop_maps()->print(); |
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982 } |
0 | 983 } |
984 if (PrintDebugInfo) { | |
985 print_scopes(); | |
986 } | |
987 if (PrintRelocations) { | |
988 print_relocations(); | |
989 } | |
990 if (PrintDependencies) { | |
991 print_dependencies(); | |
992 } | |
993 if (PrintExceptionHandlers) { | |
994 print_handler_table(); | |
995 print_nul_chk_table(); | |
996 } | |
997 if (xtty != NULL) { | |
998 xtty->tail("print_nmethod"); | |
999 } | |
1000 } | |
1001 | |
1002 | |
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1003 // Promote one word from an assembly-time handle to a live embedded oop. |
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1004 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1005 if (handle == NULL || |
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1006 // As a special case, IC oops are initialized to 1 or -1. |
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1007 handle == (jobject) Universe::non_oop_word()) { |
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1008 (*dest) = (oop) handle; |
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1009 } else { |
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1010 (*dest) = JNIHandles::resolve_non_null(handle); |
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1011 } |
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1012 } |
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1013 |
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1014 |
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1015 // Have to have the same name because it's called by a template |
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1016 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1017 int length = array->length(); |
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1018 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1019 oop* dest = oops_begin(); |
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1020 for (int index = 0 ; index < length; index++) { |
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1021 initialize_immediate_oop(&dest[index], array->at(index)); |
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1022 } |
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1023 |
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1024 // Now we can fix up all the oops in the code. We need to do this |
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1025 // in the code because the assembler uses jobjects as placeholders. |
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1026 // The code and relocations have already been initialized by the |
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1027 // CodeBlob constructor, so it is valid even at this early point to |
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1028 // iterate over relocations and patch the code. |
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1029 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1030 } |
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1031 |
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1032 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1033 int length = array->length(); |
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1034 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1035 Metadata** dest = metadata_begin(); |
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1036 for (int index = 0 ; index < length; index++) { |
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1037 dest[index] = array->at(index); |
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1038 } |
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1039 } |
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1040 |
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1041 bool nmethod::is_at_poll_return(address pc) { |
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1042 RelocIterator iter(this, pc, pc+1); |
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1043 while (iter.next()) { |
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1044 if (iter.type() == relocInfo::poll_return_type) |
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1045 return true; |
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1046 } |
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1047 return false; |
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1048 } |
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1049 |
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1050 |
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1051 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1052 RelocIterator iter(this, pc, pc+1); |
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1053 while (iter.next()) { |
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1054 relocInfo::relocType t = iter.type(); |
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1055 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1056 return true; |
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1057 } |
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1058 return false; |
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1059 } |
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1060 |
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1061 |
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1062 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1063 // re-patch all oop-bearing instructions, just in case some oops moved |
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1064 RelocIterator iter(this, begin, end); |
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1065 while (iter.next()) { |
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1066 if (iter.type() == relocInfo::oop_type) { |
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1067 oop_Relocation* reloc = iter.oop_reloc(); |
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1068 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1069 oop* dest = reloc->oop_addr(); |
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1070 initialize_immediate_oop(dest, (jobject) *dest); |
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1071 } |
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1072 // Refresh the oop-related bits of this instruction. |
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1073 reloc->fix_oop_relocation(); |
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1074 } else if (iter.type() == relocInfo::metadata_type) { |
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1075 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1076 reloc->fix_metadata_relocation(); |
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1077 } |
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1078 |
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1079 // There must not be any interfering patches or breakpoints. |
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1080 assert(!(iter.type() == relocInfo::breakpoint_type |
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1081 && iter.breakpoint_reloc()->active()), |
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1082 "no active breakpoint"); |
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1083 } |
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1084 } |
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1085 |
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1086 |
2375
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1087 void nmethod::verify_oop_relocations() { |
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1088 // Ensure sure that the code matches the current oop values |
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1089 RelocIterator iter(this, NULL, NULL); |
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1090 while (iter.next()) { |
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1091 if (iter.type() == relocInfo::oop_type) { |
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1092 oop_Relocation* reloc = iter.oop_reloc(); |
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1093 if (!reloc->oop_is_immediate()) { |
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1094 reloc->verify_oop_relocation(); |
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1095 } |
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1096 } |
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1097 } |
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1098 } |
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1099 |
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1100 |
0 | 1101 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1102 PcDesc* pd = pc_desc_at(pc); | |
1103 guarantee(pd != NULL, "scope must be present"); | |
1104 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1105 pd->obj_decode_offset(), pd->should_reexecute(), |
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1106 pd->return_oop()); |
0 | 1107 } |
1108 | |
1109 | |
1110 void nmethod::clear_inline_caches() { | |
1111 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1112 if (is_zombie()) { | |
1113 return; | |
1114 } | |
1115 | |
1116 RelocIterator iter(this); | |
1117 while (iter.next()) { | |
1118 iter.reloc()->clear_inline_cache(); | |
1119 } | |
1120 } | |
1121 | |
1122 | |
1123 void nmethod::cleanup_inline_caches() { | |
1124 | |
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1125 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1126 |
1127 // If the method is not entrant or zombie then a JMP is plastered over the | |
1128 // first few bytes. If an oop in the old code was there, that oop | |
1129 // should not get GC'd. Skip the first few bytes of oops on | |
1130 // not-entrant methods. | |
1131 address low_boundary = verified_entry_point(); | |
1132 if (!is_in_use()) { | |
1133 low_boundary += NativeJump::instruction_size; | |
1134 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1135 // This means that the low_boundary is going to be a little too high. | |
1136 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1137 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1138 } | |
1139 | |
1140 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1141 ResourceMark rm; | |
1142 RelocIterator iter(this, low_boundary); | |
1143 while(iter.next()) { | |
1144 switch(iter.type()) { | |
1145 case relocInfo::virtual_call_type: | |
1146 case relocInfo::opt_virtual_call_type: { | |
1147 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1148 // Ok, to lookup references to zombies here | |
1149 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1150 if( cb != NULL && cb->is_nmethod() ) { | |
1151 nmethod* nm = (nmethod*)cb; | |
1152 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1153 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1154 } |
1155 break; | |
1156 } | |
1157 case relocInfo::static_call_type: { | |
1158 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1159 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1160 if( cb != NULL && cb->is_nmethod() ) { | |
1161 nmethod* nm = (nmethod*)cb; | |
1162 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1163 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1164 } |
1165 break; | |
1166 } | |
1167 } | |
1168 } | |
1169 } | |
1170 | |
989
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1171 // This is a private interface with the sweeper. |
0 | 1172 void nmethod::mark_as_seen_on_stack() { |
1173 assert(is_not_entrant(), "must be a non-entrant method"); | |
1644
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1174 // Set the traversal mark to ensure that the sweeper does 2 |
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1175 // cleaning passes before moving to zombie. |
0 | 1176 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1177 } | |
1178 | |
2342
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1179 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1180 // there are no activations on the stack, not in use by the VM, |
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1181 // and not in use by the ServiceThread) |
0 | 1182 bool nmethod::can_not_entrant_be_converted() { |
1183 assert(is_not_entrant(), "must be a non-entrant method"); | |
1184 | |
1185 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1186 // count can be greater than the stack traversal count before it hits the | |
1187 // nmethod for the second time. | |
2342
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1188 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1189 !is_locked_by_vm(); |
0 | 1190 } |
1191 | |
1192 void nmethod::inc_decompile_count() { | |
1783 | 1193 if (!is_compiled_by_c2()) return; |
0 | 1194 // Could be gated by ProfileTraps, but do not bother... |
6725
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1195 Method* m = method(); |
0 | 1196 if (m == NULL) return; |
6725
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1197 MethodData* mdo = m->method_data(); |
0 | 1198 if (mdo == NULL) return; |
6725
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1199 // There is a benign race here. See comments in methodData.hpp. |
0 | 1200 mdo->inc_decompile_count(); |
1201 } | |
1202 | |
1203 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1204 | |
1205 post_compiled_method_unload(); | |
1206 | |
1207 // Since this nmethod is being unloaded, make sure that dependencies | |
1208 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1209 // indicate that this work is being done during a GC. | |
1210 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1211 assert(is_alive != NULL, "Should be non-NULL"); | |
1212 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1213 flush_dependencies(is_alive); | |
1214 | |
1215 // Break cycle between nmethod & method | |
1216 if (TraceClassUnloading && WizardMode) { | |
1217 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
6725
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1218 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1219 "), cause(" INTPTR_FORMAT ")", |
1220 this, (address)_method, (address)cause); | |
989
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1221 if (!Universe::heap()->is_gc_active()) |
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1222 cause->klass()->print(); |
0 | 1223 } |
941 | 1224 // Unlink the osr method, so we do not look this up again |
1225 if (is_osr_method()) { | |
1226 invalidate_osr_method(); | |
1227 } | |
6725
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|
1228 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1229 // so we don't have to break the cycle. Note that it is possible to |
6725
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1230 // have the Method* live here, in case we unload the nmethod because |
da91efe96a93
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1231 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1232 if (_method != NULL) { |
6725
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1233 // OSR methods point to the Method*, but the Method* does not |
0 | 1234 // point back! |
1235 if (_method->code() == this) { | |
1236 _method->clear_code(); // Break a cycle | |
1237 } | |
1238 _method = NULL; // Clear the method of this dead nmethod | |
1239 } | |
1240 // Make the class unloaded - i.e., change state and notify sweeper | |
1538
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1241 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1242 if (is_in_use()) { |
1243 // Transitioning directly from live to unloaded -- so | |
1244 // we need to force a cache clean-up; remember this | |
1245 // for later on. | |
1246 CodeCache::set_needs_cache_clean(true); | |
1247 } | |
1644
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|
1248 _state = unloaded; |
0 | 1249 |
1109
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|
1250 // Log the unloading. |
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|
1251 log_state_change(); |
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|
1252 |
6725
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1253 // The Method* is gone at this point |
0 | 1254 assert(_method == NULL, "Tautology"); |
1255 | |
989
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931
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|
1256 set_osr_link(NULL); |
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|
1257 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1258 NMethodSweeper::notify(this); |
1259 } | |
1260 | |
1261 void nmethod::invalidate_osr_method() { | |
1262 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1263 // Remove from list of active nmethods | |
1264 if (method() != NULL) | |
6725
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1265 InstanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); |
0 | 1266 // Set entry as invalid |
1267 _entry_bci = InvalidOSREntryBci; | |
1268 } | |
1269 | |
1109
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|
1270 void nmethod::log_state_change() const { |
0 | 1271 if (LogCompilation) { |
1272 if (xtty != NULL) { | |
1273 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1274 if (_state == unloaded) { |
1109
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|
1275 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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|
1276 os::current_thread_id()); |
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|
1277 } else { |
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|
1278 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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|
1279 os::current_thread_id(), |
1644
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1280 (_state == zombie ? " zombie='1'" : "")); |
1109
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|
1281 } |
0 | 1282 log_identity(xtty); |
1283 xtty->stamp(); | |
1284 xtty->end_elem(); | |
1285 } | |
1286 } | |
1644
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1287 if (PrintCompilation && _state != unloaded) { |
2405
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|
1288 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1289 } |
1290 } | |
1291 | |
1292 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1293 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1294 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1295 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1296 |
1644
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1297 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1298 nmethodLocker nml(this); |
1644
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1299 methodHandle the_method(method()); |
1726 | 1300 No_Safepoint_Verifier nsv; |
0 | 1301 |
1302 { | |
1109
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1303 // invalidate osr nmethod before acquiring the patching lock since |
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1304 // they both acquire leaf locks and we don't want a deadlock. |
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1305 // This logic is equivalent to the logic below for patching the |
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1306 // verified entry point of regular methods. |
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1307 if (is_osr_method()) { |
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1308 // this effectively makes the osr nmethod not entrant |
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|
1309 invalidate_osr_method(); |
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1310 } |
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1311 |
0 | 1312 // Enter critical section. Does not block for safepoint. |
1313 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1314 |
1644
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1315 if (_state == state) { |
1109
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1316 // another thread already performed this transition so nothing |
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1317 // to do, but return false to indicate this. |
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1318 return false; |
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|
1319 } |
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1320 |
0 | 1321 // The caller can be calling the method statically or through an inline |
1322 // cache call. | |
1109
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1323 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1324 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1325 SharedRuntime::get_handle_wrong_method_stub()); | |
1326 } | |
1327 | |
1644
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1328 if (is_in_use()) { |
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1329 // It's a true state change, so mark the method as decompiled. |
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1330 // Do it only for transition from alive. |
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1331 inc_decompile_count(); |
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1332 } |
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1333 |
0 | 1334 // Change state |
1644
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1335 _state = state; |
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1336 |
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1337 // Log the transition once |
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1338 log_state_change(); |
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1339 |
1644
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1340 // Remove nmethod from method. |
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1341 // We need to check if both the _code and _from_compiled_code_entry_point |
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1342 // refer to this nmethod because there is a race in setting these two fields |
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1343 // in Method* as seen in bugid 4947125. |
1644
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1344 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1345 // could be flushed and the compiler and vtable stubs could still call |
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1346 // through it. |
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1347 if (method() != NULL && (method()->code() == this || |
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1348 method()->from_compiled_entry() == verified_entry_point())) { |
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1349 HandleMark hm; |
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1350 method()->clear_code(); |
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1351 } |
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1352 |
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1353 if (state == not_entrant) { |
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1354 mark_as_seen_on_stack(); |
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1355 } |
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1356 |
0 | 1357 } // leave critical region under Patching_lock |
1358 | |
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1359 // When the nmethod becomes zombie it is no longer alive so the |
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1360 // dependencies must be flushed. nmethods in the not_entrant |
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1361 // state will be flushed later when the transition to zombie |
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1362 // happens or they get unloaded. |
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1363 if (state == zombie) { |
1726 | 1364 { |
1365 // Flushing dependecies must be done before any possible | |
1366 // safepoint can sneak in, otherwise the oops used by the | |
1367 // dependency logic could have become stale. | |
1368 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1369 flush_dependencies(NULL); | |
1370 } | |
1644
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1371 |
2342
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1372 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1373 // event and it hasn't already been reported for this nmethod then |
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1374 // report it now. The event may have been reported earilier if the GC |
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1375 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1376 // we no longer go to a safepoint here. |
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1377 post_compiled_method_unload(); |
1726 | 1378 |
1379 #ifdef ASSERT | |
1380 // It's no longer safe to access the oops section since zombie | |
1381 // nmethods aren't scanned for GC. | |
1382 _oops_are_stale = true; | |
1383 #endif | |
1538
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1384 } else { |
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1385 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1386 } |
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1387 |
0 | 1388 if (TraceCreateZombies) { |
1389 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1390 } | |
1391 | |
1392 // Make sweeper aware that there is a zombie method that needs to be removed | |
1393 NMethodSweeper::notify(this); | |
1394 | |
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1395 return true; |
0 | 1396 } |
1397 | |
1398 void nmethod::flush() { | |
1399 // Note that there are no valid oops in the nmethod anymore. | |
1400 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1401 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1402 | |
1403 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1404 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1405 |
1406 // completely deallocate this method | |
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1407 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1408 if (PrintMethodFlushing) { |
1202 | 1409 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1410 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1411 } |
1412 | |
1413 // We need to deallocate any ExceptionCache data. | |
1414 // Note that we do not need to grab the nmethod lock for this, it | |
1415 // better be thread safe if we're disposing of it! | |
1416 ExceptionCache* ec = exception_cache(); | |
1417 set_exception_cache(NULL); | |
1418 while(ec != NULL) { | |
1419 ExceptionCache* next = ec->next(); | |
1420 delete ec; | |
1421 ec = next; | |
1422 } | |
1423 | |
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1424 if (on_scavenge_root_list()) { |
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1425 CodeCache::drop_scavenge_root_nmethod(this); |
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1426 } |
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1427 |
1202 | 1428 if (is_speculatively_disconnected()) { |
1429 CodeCache::remove_saved_code(this); | |
1430 } | |
1431 | |
1692 | 1432 #ifdef SHARK |
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1433 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1434 #endif // SHARK |
1435 | |
0 | 1436 ((CodeBlob*)(this))->flush(); |
1437 | |
1438 CodeCache::free(this); | |
1439 } | |
1440 | |
1441 | |
1442 // | |
1443 // Notify all classes this nmethod is dependent on that it is no | |
1444 // longer dependent. This should only be called in two situations. | |
1445 // First, when a nmethod transitions to a zombie all dependents need | |
1446 // to be clear. Since zombification happens at a safepoint there's no | |
1447 // synchronization issues. The second place is a little more tricky. | |
1448 // During phase 1 of mark sweep class unloading may happen and as a | |
1449 // result some nmethods may get unloaded. In this case the flushing | |
1450 // of dependencies must happen during phase 1 since after GC any | |
1451 // dependencies in the unloaded nmethod won't be updated, so | |
1452 // traversing the dependency information in unsafe. In that case this | |
1453 // function is called with a non-NULL argument and this function only | |
1454 // notifies instanceKlasses that are reachable | |
1455 | |
1456 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1457 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1458 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1459 "is_alive is non-NULL if and only if we are called during GC"); | |
1460 if (!has_flushed_dependencies()) { | |
1461 set_has_flushed_dependencies(); | |
1462 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1463 Klass* klass = deps.context_type(); |
0 | 1464 if (klass == NULL) continue; // ignore things like evol_method |
1465 | |
1466 // During GC the is_alive closure is non-NULL, and is used to | |
1467 // determine liveness of dependees that need to be updated. | |
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1468 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1469 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1470 } |
1471 } | |
1472 } | |
1473 } | |
1474 | |
1475 | |
1476 // If this oop is not live, the nmethod can be unloaded. | |
1477 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1478 OopClosure* keep_alive, | |
1479 oop* root, bool unloading_occurred) { | |
1480 assert(root != NULL, "just checking"); | |
1481 oop obj = *root; | |
1482 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1483 return false; | |
1484 } | |
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1485 |
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1486 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1487 // simply because one of its constant oops has gone dead. |
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1488 // No actual classes need to be unloaded in order for this to occur. |
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1489 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1490 make_unloaded(is_alive, obj); |
1491 return true; | |
1492 } | |
1493 | |
1494 // ------------------------------------------------------------------ | |
1495 // post_compiled_method_load_event | |
1496 // new method for install_code() path | |
1497 // Transfer information from compilation to jvmti | |
1498 void nmethod::post_compiled_method_load_event() { | |
1499 | |
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1500 Method* moop = method(); |
4006 | 1501 #ifndef USDT2 |
0 | 1502 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1503 moop->klass_name()->bytes(), | |
1504 moop->klass_name()->utf8_length(), | |
1505 moop->name()->bytes(), | |
1506 moop->name()->utf8_length(), | |
1507 moop->signature()->bytes(), | |
1508 moop->signature()->utf8_length(), | |
1748 | 1509 insts_begin(), insts_size()); |
4006 | 1510 #else /* USDT2 */ |
1511 HOTSPOT_COMPILED_METHOD_LOAD( | |
1512 (char *) moop->klass_name()->bytes(), | |
1513 moop->klass_name()->utf8_length(), | |
1514 (char *) moop->name()->bytes(), | |
1515 moop->name()->utf8_length(), | |
1516 (char *) moop->signature()->bytes(), | |
1517 moop->signature()->utf8_length(), | |
1518 insts_begin(), insts_size()); | |
1519 #endif /* USDT2 */ | |
0 | 1520 |
1616
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1521 if (JvmtiExport::should_post_compiled_method_load() || |
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1522 JvmtiExport::should_post_compiled_method_unload()) { |
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1523 get_and_cache_jmethod_id(); |
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1524 } |
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1525 |
0 | 1526 if (JvmtiExport::should_post_compiled_method_load()) { |
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1527 // Let the Service thread (which is a real Java thread) post the event |
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1528 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1529 JvmtiDeferredEventQueue::enqueue( |
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1530 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1531 } |
1532 } | |
1533 | |
1616
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1534 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1535 if (_jmethod_id == NULL) { |
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1536 // Cache the jmethod_id since it can no longer be looked up once the |
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1537 // method itself has been marked for unloading. |
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1538 _jmethod_id = method()->jmethod_id(); |
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|
1539 } |
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1540 return _jmethod_id; |
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1541 } |
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1542 |
0 | 1543 void nmethod::post_compiled_method_unload() { |
1577
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1544 if (unload_reported()) { |
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1545 // During unloading we transition to unloaded and then to zombie |
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1546 // and the unloading is reported during the first transition. |
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1547 return; |
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1548 } |
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1549 |
0 | 1550 assert(_method != NULL && !is_unloaded(), "just checking"); |
1551 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1552 | |
1553 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1554 // post the event. Sometime later this nmethod will be made a zombie |
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1555 // by the sweeper but the Method* will not be valid at that point. |
1616
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1556 // If the _jmethod_id is null then no load event was ever requested |
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1557 // so don't bother posting the unload. The main reason for this is |
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1558 // that the jmethodID is a weak reference to the Method* so if |
1616
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1559 // it's being unloaded there's no way to look it up since the weak |
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1560 // ref will have been cleared. |
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1561 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1562 assert(!unload_reported(), "already unloaded"); |
2195
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1563 JvmtiDeferredEvent event = |
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1564 JvmtiDeferredEvent::compiled_method_unload_event(this, |
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1565 _jmethod_id, insts_begin()); |
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1566 if (SafepointSynchronize::is_at_safepoint()) { |
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1567 // Don't want to take the queueing lock. Add it as pending and |
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1568 // it will get enqueued later. |
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1569 JvmtiDeferredEventQueue::add_pending_event(event); |
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1570 } else { |
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1571 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1572 JvmtiDeferredEventQueue::enqueue(event); |
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1573 } |
0 | 1574 } |
1575 | |
1576 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1577 // any time. As the nmethod is being unloaded now we mark it has | |
1578 // having the unload event reported - this will ensure that we don't | |
1579 // attempt to report the event in the unlikely scenario where the | |
1580 // event is enabled at the time the nmethod is made a zombie. | |
1581 set_unload_reported(); | |
1582 } | |
1583 | |
1584 // This is called at the end of the strong tracing/marking phase of a | |
1585 // GC to unload an nmethod if it contains otherwise unreachable | |
1586 // oops. | |
1587 | |
1588 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1589 OopClosure* keep_alive, bool unloading_occurred) { | |
1590 // Make sure the oop's ready to receive visitors | |
1591 assert(!is_zombie() && !is_unloaded(), | |
1592 "should not call follow on zombie or unloaded nmethod"); | |
1593 | |
1594 // If the method is not entrant then a JMP is plastered over the | |
1595 // first few bytes. If an oop in the old code was there, that oop | |
1596 // should not get GC'd. Skip the first few bytes of oops on | |
1597 // not-entrant methods. | |
1598 address low_boundary = verified_entry_point(); | |
1599 if (is_not_entrant()) { | |
1600 low_boundary += NativeJump::instruction_size; | |
1601 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1602 // (See comment above.) | |
1603 } | |
1604 | |
1605 // The RedefineClasses() API can cause the class unloading invariant | |
1606 // to no longer be true. See jvmtiExport.hpp for details. | |
1607 // Also, leave a debugging breadcrumb in local flag. | |
1608 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1609 if (a_class_was_redefined) { | |
1610 // This set of the unloading_occurred flag is done before the | |
1611 // call to post_compiled_method_unload() so that the unloading | |
1612 // of this nmethod is reported. | |
1613 unloading_occurred = true; | |
1614 } | |
1615 | |
1616 // Exception cache | |
1617 ExceptionCache* ec = exception_cache(); | |
1618 while (ec != NULL) { | |
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1619 Klass* ex_klass = ec->exception_type(); |
0 | 1620 ExceptionCache* next_ec = ec->next(); |
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1621 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1622 remove_from_exception_cache(ec); |
1623 } | |
1624 ec = next_ec; | |
1625 } | |
1626 | |
1627 // If class unloading occurred we first iterate over all inline caches and | |
1628 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1629 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1630 // iteration below. | |
1631 if (unloading_occurred) { | |
1632 RelocIterator iter(this, low_boundary); | |
1633 while(iter.next()) { | |
1634 if (iter.type() == relocInfo::virtual_call_type) { | |
1635 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1636 if (ic->is_icholder_call()) { |
0 | 1637 // The only exception is compiledICHolder oops which may |
1638 // yet be marked below. (We check this further below). | |
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1639 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1640 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1641 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
0 | 1642 continue; |
1643 } | |
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1644 } else { |
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1645 Metadata* ic_oop = ic->cached_metadata(); |
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1646 if (ic_oop != NULL) { |
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1647 if (ic_oop->is_klass()) { |
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1648 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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1649 continue; |
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1650 } |
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1651 } else if (ic_oop->is_method()) { |
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1652 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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1653 continue; |
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1654 } |
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1655 } else { |
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1656 ShouldNotReachHere(); |
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1657 } |
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1658 } |
0 | 1659 } |
1660 ic->set_to_clean(); | |
1661 } | |
1662 } | |
1663 } | |
1664 | |
1665 // Compiled code | |
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1666 { |
0 | 1667 RelocIterator iter(this, low_boundary); |
1668 while (iter.next()) { | |
1669 if (iter.type() == relocInfo::oop_type) { | |
1670 oop_Relocation* r = iter.oop_reloc(); | |
1671 // In this loop, we must only traverse those oops directly embedded in | |
1672 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1673 assert(1 == (r->oop_is_immediate()) + | |
1674 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1675 "oop must be found in exactly one place"); | |
1676 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1677 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1678 return; | |
1679 } | |
1680 } | |
1681 } | |
1682 } | |
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1683 } |
0 | 1684 |
1685 | |
1686 // Scopes | |
1687 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1688 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1689 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1690 return; | |
1691 } | |
1692 } | |
1693 | |
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1694 // Ensure that all metadata is still alive |
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1695 verify_metadata_loaders(low_boundary, is_alive); |
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1696 } |
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1697 |
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1698 #ifdef ASSERT |
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1699 |
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1700 class CheckClass : AllStatic { |
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1701 static BoolObjectClosure* _is_alive; |
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1702 |
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1703 // Check class_loader is alive for this bit of metadata. |
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1704 static void check_class(Metadata* md) { |
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1705 Klass* klass = NULL; |
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1706 if (md->is_klass()) { |
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1707 klass = ((Klass*)md); |
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1708 } else if (md->is_method()) { |
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1709 klass = ((Method*)md)->method_holder(); |
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1710 } else if (md->is_methodData()) { |
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1711 klass = ((MethodData*)md)->method()->method_holder(); |
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1712 } else { |
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1713 md->print(); |
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1714 ShouldNotReachHere(); |
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1715 } |
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1716 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1717 } |
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1718 public: |
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1719 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1720 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1721 _is_alive = is_alive; |
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1722 nm->metadata_do(check_class); |
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1723 } |
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1724 }; |
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1725 |
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1726 // This is called during a safepoint so can use static data |
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1727 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1728 #endif // ASSERT |
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1729 |
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1730 |
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1731 // Processing of oop references should have been sufficient to keep |
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1732 // all strong references alive. Any weak references should have been |
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1733 // cleared as well. Visit all the metadata and ensure that it's |
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1734 // really alive. |
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1735 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1736 #ifdef ASSERT |
0 | 1737 RelocIterator iter(this, low_boundary); |
1738 while (iter.next()) { | |
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1739 // static_stub_Relocations may have dangling references to |
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1740 // Method*s so trim them out here. Otherwise it looks like |
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1741 // compiled code is maintaining a link to dead metadata. |
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1742 address static_call_addr = NULL; |
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1743 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1744 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1745 if (!cic->is_call_to_interpreted()) { |
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1746 static_call_addr = iter.addr(); |
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1747 } |
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1748 } else if (iter.type() == relocInfo::static_call_type) { |
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1749 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1750 if (!csc->is_call_to_interpreted()) { |
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1751 static_call_addr = iter.addr(); |
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1752 } |
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1753 } |
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1754 if (static_call_addr != NULL) { |
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1755 RelocIterator sciter(this, low_boundary); |
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1756 while (sciter.next()) { |
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1757 if (sciter.type() == relocInfo::static_stub_type && |
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1758 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1759 sciter.static_stub_reloc()->clear_inline_cache(); |
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1760 } |
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1761 } |
0 | 1762 } |
1763 } | |
6725
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1764 // Check that the metadata embedded in the nmethod is alive |
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1765 CheckClass::do_check_class(is_alive, this); |
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1766 #endif |
0 | 1767 } |
1768 | |
6725
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1769 |
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1770 // Iterate over metadata calling this function. Used by RedefineClasses |
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1771 void nmethod::metadata_do(void f(Metadata*)) { |
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1772 address low_boundary = verified_entry_point(); |
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1773 if (is_not_entrant()) { |
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1774 low_boundary += NativeJump::instruction_size; |
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1775 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1776 // (See comment above.) |
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1777 } |
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1778 { |
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1779 // Visit all immediate references that are embedded in the instruction stream. |
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1780 RelocIterator iter(this, low_boundary); |
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1781 while (iter.next()) { |
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1782 if (iter.type() == relocInfo::metadata_type ) { |
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1783 metadata_Relocation* r = iter.metadata_reloc(); |
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1784 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1785 // the code. Other metadatas (oop_index>0) are seen as part of |
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1786 // the metadata section below. |
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1787 assert(1 == (r->metadata_is_immediate()) + |
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1788 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1789 "metadata must be found in exactly one place"); |
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1790 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1791 Metadata* md = r->metadata_value(); |
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1792 f(md); |
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1793 } |
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1794 } |
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1795 } |
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1796 } |
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1797 |
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1798 // Visit the metadata section |
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1799 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1800 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1801 Metadata* md = *p; |
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1802 f(md); |
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1803 } |
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1804 // Call function Method*, not embedded in these other places. |
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1805 if (_method != NULL) f(_method); |
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1806 } |
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1807 |
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1808 |
941 | 1809 // This method is called twice during GC -- once while |
1810 // tracing the "active" nmethods on thread stacks during | |
1811 // the (strong) marking phase, and then again when walking | |
1812 // the code cache contents during the weak roots processing | |
1813 // phase. The two uses are distinguished by means of the | |
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1814 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1815 // case. We want to walk the weak roots in the nmethod |
1816 // only in the second case. The weak roots in the nmethod | |
1817 // are the oops in the ExceptionCache and the InlineCache | |
1818 // oops. | |
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1819 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1820 // make sure the oops ready to receive visitors |
1821 assert(!is_zombie() && !is_unloaded(), | |
1822 "should not call follow on zombie or unloaded nmethod"); | |
1823 | |
1824 // If the method is not entrant or zombie then a JMP is plastered over the | |
1825 // first few bytes. If an oop in the old code was there, that oop | |
1826 // should not get GC'd. Skip the first few bytes of oops on | |
1827 // not-entrant methods. | |
1828 address low_boundary = verified_entry_point(); | |
1829 if (is_not_entrant()) { | |
1830 low_boundary += NativeJump::instruction_size; | |
1831 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1832 // (See comment above.) | |
1833 } | |
1834 | |
1835 RelocIterator iter(this, low_boundary); | |
941 | 1836 |
0 | 1837 while (iter.next()) { |
1838 if (iter.type() == relocInfo::oop_type ) { | |
1839 oop_Relocation* r = iter.oop_reloc(); | |
1840 // In this loop, we must only follow those oops directly embedded in | |
1841 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1842 assert(1 == (r->oop_is_immediate()) + |
1843 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1844 "oop must be found in exactly one place"); | |
0 | 1845 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1846 f->do_oop(r->oop_addr()); | |
1847 } | |
1848 } | |
1849 } | |
1850 | |
1851 // Scopes | |
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1852 // This includes oop constants not inlined in the code stream. |
0 | 1853 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1854 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1855 f->do_oop(p); | |
1856 } | |
1857 } | |
1858 | |
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1859 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1860 |
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1861 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1862 |
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1863 // An nmethod is "marked" if its _mark_link is set non-null. |
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1864 // Even if it is the end of the linked list, it will have a non-null link value, |
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1865 // as long as it is on the list. |
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1866 // This code must be MP safe, because it is used from parallel GC passes. |
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1867 bool nmethod::test_set_oops_do_mark() { |
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1868 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1869 nmethod* observed_mark_link = _oops_do_mark_link; |
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1870 if (observed_mark_link == NULL) { |
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1871 // Claim this nmethod for this thread to mark. |
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1872 observed_mark_link = (nmethod*) |
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1873 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1874 if (observed_mark_link == NULL) { |
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1875 |
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1876 // Atomically append this nmethod (now claimed) to the head of the list: |
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1877 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1878 for (;;) { |
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1879 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1880 _oops_do_mark_link = required_mark_nmethods; |
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1881 observed_mark_nmethods = (nmethod*) |
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1882 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1883 if (observed_mark_nmethods == required_mark_nmethods) |
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1884 break; |
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1885 } |
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1886 // Mark was clear when we first saw this guy. |
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1887 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
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1888 return false; |
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1889 } |
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1890 } |
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1891 // On fall through, another racing thread marked this nmethod before we did. |
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1892 return true; |
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1893 } |
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1894 |
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1895 void nmethod::oops_do_marking_prologue() { |
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1896 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1897 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1898 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1899 // may fork a bunch of threads, and we need them all to see the same state. |
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1900 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1901 guarantee(observed == NULL, "no races in this sequential code"); |
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1902 } |
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1903 |
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1904 void nmethod::oops_do_marking_epilogue() { |
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1905 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1906 nmethod* cur = _oops_do_mark_nmethods; |
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1907 while (cur != NMETHOD_SENTINEL) { |
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1908 assert(cur != NULL, "not NULL-terminated"); |
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1909 nmethod* next = cur->_oops_do_mark_link; |
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1910 cur->_oops_do_mark_link = NULL; |
2375
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1911 cur->fix_oop_relocations(); |
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1912 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
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1913 cur = next; |
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1914 } |
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1915 void* required = _oops_do_mark_nmethods; |
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1916 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1917 guarantee(observed == required, "no races in this sequential code"); |
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1918 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1919 } |
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1920 |
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1921 class DetectScavengeRoot: public OopClosure { |
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1922 bool _detected_scavenge_root; |
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1923 public: |
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1924 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1925 { NOT_PRODUCT(_print_nm = NULL); } |
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1926 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1927 virtual void do_oop(oop* p) { |
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1928 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1929 NOT_PRODUCT(maybe_print(p)); |
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1930 _detected_scavenge_root = true; |
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1931 } |
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1932 } |
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1933 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1934 |
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1935 #ifndef PRODUCT |
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1936 nmethod* _print_nm; |
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1937 void maybe_print(oop* p) { |
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1938 if (_print_nm == NULL) return; |
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1939 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1940 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
989
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1941 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1942 (intptr_t)(*p), (intptr_t)p); |
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1943 (*p)->print(); |
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1944 } |
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1945 #endif //PRODUCT |
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1946 }; |
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1947 |
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1948 bool nmethod::detect_scavenge_root_oops() { |
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1949 DetectScavengeRoot detect_scavenge_root; |
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1950 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1951 oops_do(&detect_scavenge_root); |
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1952 return detect_scavenge_root.detected_scavenge_root(); |
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1953 } |
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1954 |
0 | 1955 // Method that knows how to preserve outgoing arguments at call. This method must be |
1956 // called with a frame corresponding to a Java invoke | |
1957 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1958 #ifndef SHARK |
0 | 1959 if (!method()->is_native()) { |
1960 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1961 Bytecode_invoke call(ssd.method(), ssd.bci()); |
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1962 // compiled invokedynamic call sites have an implicit receiver at |
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1963 // resolution time, so make sure it gets GC'ed. |
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1964 bool has_receiver = !call.is_invokestatic(); |
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1965 Symbol* signature = call.signature(); |
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1966 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1967 } |
1692 | 1968 #endif // !SHARK |
0 | 1969 } |
1970 | |
1971 | |
1972 oop nmethod::embeddedOop_at(u_char* p) { | |
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1973 RelocIterator iter(this, p, p + 1); |
0 | 1974 while (iter.next()) |
1975 if (iter.type() == relocInfo::oop_type) { | |
1976 return iter.oop_reloc()->oop_value(); | |
1977 } | |
1978 return NULL; | |
1979 } | |
1980 | |
1981 | |
1982 inline bool includes(void* p, void* from, void* to) { | |
1983 return from <= p && p < to; | |
1984 } | |
1985 | |
1986 | |
1987 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1988 assert(count >= 2, "must be sentinel values, at least"); | |
1989 | |
1990 #ifdef ASSERT | |
1991 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1992 int prev_offset = pcs[0].pc_offset(); | |
1993 assert(prev_offset == PcDesc::lower_offset_limit, | |
1994 "must start with a sentinel"); | |
1995 for (int i = 1; i < count; i++) { | |
1996 int this_offset = pcs[i].pc_offset(); | |
1997 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1998 prev_offset = this_offset; | |
1999 } | |
2000 assert(prev_offset == PcDesc::upper_offset_limit, | |
2001 "must end with a sentinel"); | |
2002 #endif //ASSERT | |
2003 | |
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2004 // Search for MethodHandle invokes and tag the nmethod. |
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2005 for (int i = 0; i < count; i++) { |
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2006 if (pcs[i].is_method_handle_invoke()) { |
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2007 set_has_method_handle_invokes(true); |
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2008 break; |
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2009 } |
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2010 } |
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2011 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2012 |
0 | 2013 int size = count * sizeof(PcDesc); |
2014 assert(scopes_pcs_size() >= size, "oob"); | |
2015 memcpy(scopes_pcs_begin(), pcs, size); | |
2016 | |
2017 // Adjust the final sentinel downward. | |
2018 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2019 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2020 last_pc->set_pc_offset(content_size() + 1); |
0 | 2021 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2022 // Fill any rounding gaps with copies of the last record. | |
2023 last_pc[1] = last_pc[0]; | |
2024 } | |
2025 // The following assert could fail if sizeof(PcDesc) is not | |
2026 // an integral multiple of oopSize (the rounding term). | |
2027 // If it fails, change the logic to always allocate a multiple | |
2028 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2029 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2030 } | |
2031 | |
2032 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2033 assert(scopes_data_size() >= size, "oob"); | |
2034 memcpy(scopes_data_begin(), buffer, size); | |
2035 } | |
2036 | |
2037 | |
2038 #ifdef ASSERT | |
2039 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2040 PcDesc* lower = nm->scopes_pcs_begin(); | |
2041 PcDesc* upper = nm->scopes_pcs_end(); | |
2042 lower += 1; // exclude initial sentinel | |
2043 PcDesc* res = NULL; | |
2044 for (PcDesc* p = lower; p < upper; p++) { | |
2045 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2046 if (match_desc(p, pc_offset, approximate)) { | |
2047 if (res == NULL) | |
2048 res = p; | |
2049 else | |
2050 res = (PcDesc*) badAddress; | |
2051 } | |
2052 } | |
2053 return res; | |
2054 } | |
2055 #endif | |
2056 | |
2057 | |
2058 // Finds a PcDesc with real-pc equal to "pc" | |
2059 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2060 address base_address = code_begin(); |
0 | 2061 if ((pc < base_address) || |
2062 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2063 return NULL; // PC is wildly out of range | |
2064 } | |
2065 int pc_offset = (int) (pc - base_address); | |
2066 | |
2067 // Check the PcDesc cache if it contains the desired PcDesc | |
2068 // (This as an almost 100% hit rate.) | |
2069 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2070 if (res != NULL) { | |
2071 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2072 return res; | |
2073 } | |
2074 | |
2075 // Fallback algorithm: quasi-linear search for the PcDesc | |
2076 // Find the last pc_offset less than the given offset. | |
2077 // The successor must be the required match, if there is a match at all. | |
2078 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2079 PcDesc* lower = scopes_pcs_begin(); | |
2080 PcDesc* upper = scopes_pcs_end(); | |
2081 upper -= 1; // exclude final sentinel | |
2082 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2083 | |
2084 #define assert_LU_OK \ | |
2085 /* invariant on lower..upper during the following search: */ \ | |
2086 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2087 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2088 assert_LU_OK; | |
2089 | |
2090 // Use the last successful return as a split point. | |
2091 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2092 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2093 if (mid->pc_offset() < pc_offset) { | |
2094 lower = mid; | |
2095 } else { | |
2096 upper = mid; | |
2097 } | |
2098 | |
2099 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2100 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2101 const int RADIX = (1 << LOG2_RADIX); | |
2102 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2103 while ((mid = lower + step) < upper) { | |
2104 assert_LU_OK; | |
2105 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2106 if (mid->pc_offset() < pc_offset) { | |
2107 lower = mid; | |
2108 } else { | |
2109 upper = mid; | |
2110 break; | |
2111 } | |
2112 } | |
2113 assert_LU_OK; | |
2114 } | |
2115 | |
2116 // Sneak up on the value with a linear search of length ~16. | |
2117 while (true) { | |
2118 assert_LU_OK; | |
2119 mid = lower + 1; | |
2120 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2121 if (mid->pc_offset() < pc_offset) { | |
2122 lower = mid; | |
2123 } else { | |
2124 upper = mid; | |
2125 break; | |
2126 } | |
2127 } | |
2128 #undef assert_LU_OK | |
2129 | |
2130 if (match_desc(upper, pc_offset, approximate)) { | |
2131 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2132 _pc_desc_cache.add_pc_desc(upper); | |
2133 return upper; | |
2134 } else { | |
2135 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2136 return NULL; | |
2137 } | |
2138 } | |
2139 | |
2140 | |
2141 bool nmethod::check_all_dependencies() { | |
2142 bool found_check = false; | |
2143 // wholesale check of all dependencies | |
2144 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2145 if (deps.check_dependency() != NULL) { | |
2146 found_check = true; | |
2147 NOT_DEBUG(break); | |
2148 } | |
2149 } | |
2150 return found_check; // tell caller if we found anything | |
2151 } | |
2152 | |
2153 bool nmethod::check_dependency_on(DepChange& changes) { | |
2154 // What has happened: | |
2155 // 1) a new class dependee has been added | |
2156 // 2) dependee and all its super classes have been marked | |
2157 bool found_check = false; // set true if we are upset | |
2158 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2159 // Evaluate only relevant dependencies. | |
2160 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2161 found_check = true; | |
2162 NOT_DEBUG(break); | |
2163 } | |
2164 } | |
2165 return found_check; | |
2166 } | |
2167 | |
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2168 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2169 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2170 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2171 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2172 if (deps.type() == Dependencies::evol_method) { | |
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2173 Method* method = deps.method_argument(0); |
0 | 2174 for (int j = 0; j < dependee_methods->length(); j++) { |
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2175 if (dependee_methods->at(j) == method) { |
0 | 2176 // RC_TRACE macro has an embedded ResourceMark |
2177 RC_TRACE(0x01000000, | |
2178 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2179 _method->method_holder()->external_name(), |
0 | 2180 _method->name()->as_C_string(), |
2181 _method->signature()->as_C_string(), compile_id(), | |
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2182 method->method_holder()->external_name(), |
0 | 2183 method->name()->as_C_string(), |
2184 method->signature()->as_C_string())); | |
2185 if (TraceDependencies || LogCompilation) | |
2186 deps.log_dependency(dependee); | |
2187 return true; | |
2188 } | |
2189 } | |
2190 } | |
2191 } | |
2192 return false; | |
2193 } | |
2194 | |
2195 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2196 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2197 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2198 if (deps.type() != Dependencies::evol_method) | |
2199 continue; | |
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2200 Method* method = deps.method_argument(0); |
0 | 2201 if (method == dependee) return true; |
2202 } | |
2203 return false; | |
2204 } | |
2205 | |
2206 | |
2207 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2208 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2209 if (is_zombie()) { |
2210 // a zombie may never be patched | |
2211 return false; | |
2212 } | |
2213 return true; | |
2214 } | |
2215 | |
2216 | |
2217 address nmethod::continuation_for_implicit_exception(address pc) { | |
2218 // Exception happened outside inline-cache check code => we are inside | |
2219 // an active nmethod => use cpc to determine a return address | |
1748 | 2220 int exception_offset = pc - code_begin(); |
0 | 2221 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2222 #ifdef ASSERT | |
2223 if (cont_offset == 0) { | |
2224 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2225 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2226 HandleMark hm(thread); | |
2227 ResourceMark rm(thread); | |
2228 CodeBlob* cb = CodeCache::find_blob(pc); | |
2229 assert(cb != NULL && cb == this, ""); | |
2230 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2231 print(); | |
2232 method()->print_codes(); | |
2233 print_code(); | |
2234 print_pcs(); | |
2235 } | |
2236 #endif | |
1250 | 2237 if (cont_offset == 0) { |
2238 // Let the normal error handling report the exception | |
2239 return NULL; | |
2240 } | |
1748 | 2241 return code_begin() + cont_offset; |
0 | 2242 } |
2243 | |
2244 | |
2245 | |
2246 void nmethod_init() { | |
2247 // make sure you didn't forget to adjust the filler fields | |
2248 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2249 } | |
2250 | |
2251 | |
2252 //------------------------------------------------------------------------------------------- | |
2253 | |
2254 | |
2255 // QQQ might we make this work from a frame?? | |
2256 nmethodLocker::nmethodLocker(address pc) { | |
2257 CodeBlob* cb = CodeCache::find_blob(pc); | |
2258 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2259 _nm = (nmethod*)cb; | |
2260 lock_nmethod(_nm); | |
2261 } | |
2262 | |
2342
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2263 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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|
2264 // should pass zombie_ok == true. |
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2265 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2266 if (nm == NULL) return; |
2267 Atomic::inc(&nm->_lock_count); | |
2342
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2268 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2269 } |
2270 | |
2271 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2272 if (nm == NULL) return; | |
2273 Atomic::dec(&nm->_lock_count); | |
2274 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2275 } | |
2276 | |
1204 | 2277 |
2278 // ----------------------------------------------------------------------------- | |
2279 // nmethod::get_deopt_original_pc | |
2280 // | |
2281 // Return the original PC for the given PC if: | |
2282 // (a) the given PC belongs to a nmethod and | |
2283 // (b) it is a deopt PC | |
2284 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2285 if (fr->cb() == NULL) return NULL; | |
2286 | |
2287 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2288 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2289 return nm->get_original_pc(fr); | |
2290 | |
2291 return NULL; | |
0 | 2292 } |
2293 | |
2294 | |
2295 // ----------------------------------------------------------------------------- | |
1135
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2296 // MethodHandle |
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2297 |
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2298 bool nmethod::is_method_handle_return(address return_pc) { |
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2299 if (!has_method_handle_invokes()) return false; |
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2300 PcDesc* pd = pc_desc_at(return_pc); |
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2301 if (pd == NULL) |
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2302 return false; |
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2303 return pd->is_method_handle_invoke(); |
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2304 } |
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2305 |
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2306 |
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2307 // ----------------------------------------------------------------------------- |
0 | 2308 // Verification |
2309 | |
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2310 class VerifyOopsClosure: public OopClosure { |
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2311 nmethod* _nm; |
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2312 bool _ok; |
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2313 public: |
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2314 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2315 bool ok() { return _ok; } |
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2316 virtual void do_oop(oop* p) { |
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2317 if ((*p) == NULL || (*p)->is_oop()) return; |
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2318 if (_ok) { |
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2319 _nm->print_nmethod(true); |
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2320 _ok = false; |
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|
2321 } |
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2322 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2323 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2324 } |
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2325 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2326 }; |
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2327 |
0 | 2328 void nmethod::verify() { |
2329 | |
2330 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2331 // seems odd. | |
2332 | |
2333 if( is_zombie() || is_not_entrant() ) | |
2334 return; | |
2335 | |
2336 // Make sure all the entry points are correctly aligned for patching. | |
2337 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2338 | |
6725
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2339 // assert(method()->is_oop(), "must be valid"); |
0 | 2340 |
2341 ResourceMark rm; | |
2342 | |
2343 if (!CodeCache::contains(this)) { | |
1490
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|
2344 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2345 } |
2346 | |
2347 if(is_native_method() ) | |
2348 return; | |
2349 | |
2350 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2351 if (nm != this) { | |
1490
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2352 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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|
2353 this)); |
0 | 2354 } |
2355 | |
2356 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2357 if (! p->verify(this)) { | |
2358 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2359 } | |
2360 } | |
2361 | |
989
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2362 VerifyOopsClosure voc(this); |
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2363 oops_do(&voc); |
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2364 assert(voc.ok(), "embedded oops must be OK"); |
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2365 verify_scavenge_root_oops(); |
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2366 |
0 | 2367 verify_scopes(); |
2368 } | |
2369 | |
2370 | |
2371 void nmethod::verify_interrupt_point(address call_site) { | |
2372 // This code does not work in release mode since | |
2373 // owns_lock only is available in debug mode. | |
2374 CompiledIC* ic = NULL; | |
2375 Thread *cur = Thread::current(); | |
2376 if (CompiledIC_lock->owner() == cur || | |
2377 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2378 SafepointSynchronize::is_at_safepoint())) { | |
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2379 ic = CompiledIC_at(this, call_site); |
0 | 2380 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
2381 } else { | |
2382 MutexLocker ml_verify (CompiledIC_lock); | |
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2383 ic = CompiledIC_at(this, call_site); |
0 | 2384 } |
2385 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2386 assert(pd != NULL, "PcDesc must exist"); | |
2387 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
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1250
diff
changeset
|
2388 pd->obj_decode_offset(), pd->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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2389 pd->return_oop()); |
0 | 2390 !sd->is_top(); sd = sd->sender()) { |
2391 sd->verify(); | |
2392 } | |
2393 } | |
2394 | |
2395 void nmethod::verify_scopes() { | |
2396 if( !method() ) return; // Runtime stubs have no scope | |
2397 if (method()->is_native()) return; // Ignore stub methods. | |
2398 // iterate through all interrupt point | |
2399 // and verify the debug information is valid. | |
2400 RelocIterator iter((nmethod*)this); | |
2401 while (iter.next()) { | |
2402 address stub = NULL; | |
2403 switch (iter.type()) { | |
2404 case relocInfo::virtual_call_type: | |
2405 verify_interrupt_point(iter.addr()); | |
2406 break; | |
2407 case relocInfo::opt_virtual_call_type: | |
2408 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2409 verify_interrupt_point(iter.addr()); | |
2410 break; | |
2411 case relocInfo::static_call_type: | |
2412 stub = iter.static_call_reloc()->static_stub(); | |
2413 //verify_interrupt_point(iter.addr()); | |
2414 break; | |
2415 case relocInfo::runtime_call_type: | |
2416 address destination = iter.reloc()->value(); | |
2417 // Right now there is no way to find out which entries support | |
2418 // an interrupt point. It would be nice if we had this | |
2419 // information in a table. | |
2420 break; | |
2421 } | |
2422 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2423 } | |
2424 } | |
2425 | |
2426 | |
2427 // ----------------------------------------------------------------------------- | |
2428 // Non-product code | |
2429 #ifndef PRODUCT | |
2430 | |
989
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2431 class DebugScavengeRoot: public OopClosure { |
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|
2432 nmethod* _nm; |
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|
2433 bool _ok; |
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|
2434 public: |
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|
2435 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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|
2436 bool ok() { return _ok; } |
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|
2437 virtual void do_oop(oop* p) { |
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|
2438 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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|
2439 if (_ok) { |
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|
2440 _nm->print_nmethod(true); |
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|
2441 _ok = false; |
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|
2442 } |
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|
2443 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
989
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|
2444 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2445 (*p)->print(); |
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|
2446 } |
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|
2447 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2448 }; |
0 | 2449 |
989
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|
2450 void nmethod::verify_scavenge_root_oops() { |
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|
2451 if (!on_scavenge_root_list()) { |
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|
2452 // Actually look inside, to verify the claim that it's clean. |
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changeset
|
2453 DebugScavengeRoot debug_scavenge_root(this); |
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|
2454 oops_do(&debug_scavenge_root); |
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|
2455 if (!debug_scavenge_root.ok()) |
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2456 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2457 } |
989
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|
2458 assert(scavenge_root_not_marked(), ""); |
0 | 2459 } |
2460 | |
100
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|
2461 #endif // PRODUCT |
0 | 2462 |
2463 // Printing operations | |
2464 | |
2465 void nmethod::print() const { | |
2466 ResourceMark rm; | |
2467 ttyLocker ttyl; // keep the following output all in one block | |
2468 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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|
2469 tty->print("Compiled method "); |
0 | 2470 |
2471 if (is_compiled_by_c1()) { | |
2472 tty->print("(c1) "); | |
2473 } else if (is_compiled_by_c2()) { | |
2474 tty->print("(c2) "); | |
1692 | 2475 } else if (is_compiled_by_shark()) { |
2476 tty->print("(shark) "); | |
0 | 2477 } else { |
2478 tty->print("(nm) "); | |
2479 } | |
2480 | |
2405
3d58a4983660
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diff
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|
2481 print_on(tty, NULL); |
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|
2482 |
0 | 2483 if (WizardMode) { |
2484 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2485 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2486 tty->print(" { "); | |
2487 if (is_in_use()) tty->print("in_use "); | |
2488 if (is_not_entrant()) tty->print("not_entrant "); | |
2489 if (is_zombie()) tty->print("zombie "); | |
2490 if (is_unloaded()) tty->print("unloaded "); | |
989
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|
2491 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2492 tty->print_cr("}:"); |
2493 } | |
2494 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2495 (address)this, | |
2496 (address)this + size(), | |
2497 size()); | |
2498 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2499 relocation_begin(), | |
2500 relocation_end(), | |
2501 relocation_size()); | |
1762
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1748
diff
changeset
|
2502 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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6961697: move nmethod constants section before instruction section
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diff
changeset
|
2503 consts_begin(), |
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|
2504 consts_end(), |
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changeset
|
2505 consts_size()); |
1748 | 2506 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2507 insts_begin(), | |
2508 insts_end(), | |
2509 insts_size()); | |
0 | 2510 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2511 stub_begin(), | |
2512 stub_end(), | |
2513 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
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diff
changeset
|
2514 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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6951083: oops and relocations should part of nmethod not CodeBlob
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diff
changeset
|
2515 oops_begin(), |
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diff
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|
2516 oops_end(), |
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|
2517 oops_size()); |
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2518 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2519 metadata_begin(), |
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|
2520 metadata_end(), |
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|
2521 metadata_size()); |
0 | 2522 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2523 scopes_data_begin(), | |
2524 scopes_data_end(), | |
2525 scopes_data_size()); | |
2526 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2527 scopes_pcs_begin(), | |
2528 scopes_pcs_end(), | |
2529 scopes_pcs_size()); | |
2530 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2531 dependencies_begin(), | |
2532 dependencies_end(), | |
2533 dependencies_size()); | |
2534 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2535 handler_table_begin(), | |
2536 handler_table_end(), | |
2537 handler_table_size()); | |
2538 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2539 nul_chk_table_begin(), | |
2540 nul_chk_table_end(), | |
2541 nul_chk_table_size()); | |
2542 } | |
2543 | |
100
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6667042: PrintAssembly option does not work without special plugin
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diff
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|
2544 void nmethod::print_code() { |
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diff
changeset
|
2545 HandleMark hm; |
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diff
changeset
|
2546 ResourceMark m; |
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diff
changeset
|
2547 Disassembler::decode(this); |
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diff
changeset
|
2548 } |
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|
2549 |
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|
2550 |
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|
2551 #ifndef PRODUCT |
0 | 2552 |
2553 void nmethod::print_scopes() { | |
2554 // Find the first pc desc for all scopes in the code and print it. | |
2555 ResourceMark rm; | |
2556 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2557 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2558 continue; | |
2559 | |
2560 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2561 sd->print_on(tty, p); | |
2562 } | |
2563 } | |
2564 | |
2565 void nmethod::print_dependencies() { | |
2566 ResourceMark rm; | |
2567 ttyLocker ttyl; // keep the following output all in one block | |
2568 tty->print_cr("Dependencies:"); | |
2569 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2570 deps.print_dependency(); | |
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2571 Klass* ctxk = deps.context_type(); |
0 | 2572 if (ctxk != NULL) { |
2573 Klass* k = Klass::cast(ctxk); | |
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2574 if (k->oop_is_instance() && ((InstanceKlass*)k)->is_dependent_nmethod(this)) { |
30 | 2575 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2576 } |
2577 } | |
2578 deps.log_dependency(); // put it into the xml log also | |
2579 } | |
2580 } | |
2581 | |
2582 | |
2583 void nmethod::print_relocations() { | |
2584 ResourceMark m; // in case methods get printed via the debugger | |
2585 tty->print_cr("relocations:"); | |
2586 RelocIterator iter(this); | |
2587 iter.print(); | |
2588 if (UseRelocIndex) { | |
2589 jint* index_end = (jint*)relocation_end() - 1; | |
2590 jint index_size = *index_end; | |
2591 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2592 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2593 if (index_size > 0) { | |
2594 jint* ip; | |
2595 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2596 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2597 ip[0], | |
2598 ip[1], | |
2599 header_end()+ip[0], | |
2600 relocation_begin()-1+ip[1]); | |
2601 for (; ip < index_end; ip++) | |
2602 tty->print_cr(" (%d ?)", ip[0]); | |
2603 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2604 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2605 } | |
2606 } | |
2607 } | |
2608 | |
2609 | |
2610 void nmethod::print_pcs() { | |
2611 ResourceMark m; // in case methods get printed via debugger | |
2612 tty->print_cr("pc-bytecode offsets:"); | |
2613 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2614 p->print(this); | |
2615 } | |
2616 } | |
2617 | |
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2618 #endif // PRODUCT |
0 | 2619 |
2620 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2621 RelocIterator iter(this, begin, end); | |
2622 bool have_one = false; | |
2623 while (iter.next()) { | |
2624 have_one = true; | |
2625 switch (iter.type()) { | |
2626 case relocInfo::none: return "no_reloc"; | |
2627 case relocInfo::oop_type: { | |
2628 stringStream st; | |
2629 oop_Relocation* r = iter.oop_reloc(); | |
2630 oop obj = r->oop_value(); | |
2631 st.print("oop("); | |
2632 if (obj == NULL) st.print("NULL"); | |
2633 else obj->print_value_on(&st); | |
2634 st.print(")"); | |
2635 return st.as_string(); | |
2636 } | |
6725
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|
2637 case relocInfo::metadata_type: { |
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|
2638 stringStream st; |
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|
2639 metadata_Relocation* r = iter.metadata_reloc(); |
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|
2640 Metadata* obj = r->metadata_value(); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2641 st.print("metadata("); |
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diff
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|
2642 if (obj == NULL) st.print("NULL"); |
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diff
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|
2643 else obj->print_value_on(&st); |
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diff
changeset
|
2644 st.print(")"); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2645 return st.as_string(); |
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diff
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|
2646 } |
0 | 2647 case relocInfo::virtual_call_type: return "virtual_call"; |
2648 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2649 case relocInfo::static_call_type: return "static_call"; | |
2650 case relocInfo::static_stub_type: return "static_stub"; | |
2651 case relocInfo::runtime_call_type: return "runtime_call"; | |
2652 case relocInfo::external_word_type: return "external_word"; | |
2653 case relocInfo::internal_word_type: return "internal_word"; | |
2654 case relocInfo::section_word_type: return "section_word"; | |
2655 case relocInfo::poll_type: return "poll"; | |
2656 case relocInfo::poll_return_type: return "poll_return"; | |
2657 case relocInfo::type_mask: return "type_bit_mask"; | |
2658 } | |
2659 } | |
2660 return have_one ? "other" : NULL; | |
2661 } | |
2662 | |
2663 // Return a the last scope in (begin..end] | |
2664 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2665 PcDesc* p = pc_desc_near(begin+1); | |
2666 if (p != NULL && p->real_pc(this) <= end) { | |
2667 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2668 p->obj_decode_offset(), p->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
parents:
1250
diff
changeset
|
2669 p->return_oop()); |
0 | 2670 } |
2671 return NULL; | |
2672 } | |
2673 | |
1155
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diff
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|
2674 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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1141
diff
changeset
|
2675 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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diff
changeset
|
2676 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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diff
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|
2677 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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jrose
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1141
diff
changeset
|
2678 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2679 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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1644
diff
changeset
|
2680 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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1644
diff
changeset
|
2681 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
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1644
diff
changeset
|
2682 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
|
2683 |
1155
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diff
changeset
|
2684 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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parents:
1644
diff
changeset
|
2685 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2686 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2687 methodHandle m = method(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2688 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2689 stream->print(" # "); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2690 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
|
2691 stream->cr(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2692 } |
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diff
changeset
|
2693 if (m.not_null() && !is_osr_method()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2694 ResourceMark rm; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2695 int sizeargs = m->size_of_parameters(); |
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diff
changeset
|
2696 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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diff
changeset
|
2697 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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diff
changeset
|
2698 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2699 int sig_index = 0; |
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diff
changeset
|
2700 if (!m->is_static()) |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2701 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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diff
changeset
|
2702 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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diff
changeset
|
2703 BasicType t = ss.type(); |
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|
2704 sig_bt[sig_index++] = t; |
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diff
changeset
|
2705 if (type2size[t] == 2) { |
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diff
changeset
|
2706 sig_bt[sig_index++] = T_VOID; |
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diff
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|
2707 } else { |
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diff
changeset
|
2708 assert(type2size[t] == 1, "size is 1 or 2"); |
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diff
changeset
|
2709 } |
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changeset
|
2710 } |
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|
2711 assert(sig_index == sizeargs, ""); |
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|
2712 } |
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|
2713 const char* spname = "sp"; // make arch-specific? |
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diff
changeset
|
2714 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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|
2715 int stack_slot_offset = this->frame_size() * wordSize; |
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|
2716 int tab1 = 14, tab2 = 24; |
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diff
changeset
|
2717 int sig_index = 0; |
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|
2718 int arg_index = (m->is_static() ? 0 : -1); |
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|
2719 bool did_old_sp = false; |
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|
2720 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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|
2721 bool at_this = (arg_index == -1); |
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|
2722 bool at_old_sp = false; |
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|
2723 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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diff
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|
2724 assert(t == sig_bt[sig_index], "sigs in sync"); |
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diff
changeset
|
2725 if (at_this) |
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diff
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|
2726 stream->print(" # this: "); |
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diff
changeset
|
2727 else |
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2728 stream->print(" # parm%d: ", arg_index); |
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2729 stream->move_to(tab1); |
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2730 VMReg fst = regs[sig_index].first(); |
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2731 VMReg snd = regs[sig_index].second(); |
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2732 if (fst->is_reg()) { |
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2733 stream->print("%s", fst->name()); |
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diff
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2734 if (snd->is_valid()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
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2735 stream->print(":%s", snd->name()); |
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|
2736 } |
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|
2737 } else if (fst->is_stack()) { |
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2738 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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2739 if (offset == stack_slot_offset) at_old_sp = true; |
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diff
changeset
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2740 stream->print("[%s+0x%x]", spname, offset); |
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|
2741 } else { |
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diff
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2742 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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|
2743 } |
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|
2744 stream->print(" "); |
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diff
changeset
|
2745 stream->move_to(tab2); |
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diff
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|
2746 stream->print("= "); |
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diff
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|
2747 if (at_this) { |
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changeset
|
2748 m->method_holder()->print_value_on(stream); |
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|
2749 } else { |
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diff
changeset
|
2750 bool did_name = false; |
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changeset
|
2751 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2752 Symbol* name = ss.as_symbol_or_null(); |
1155
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diff
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2753 if (name != NULL) { |
4e6abf09f540
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diff
changeset
|
2754 name->print_value_on(stream); |
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diff
changeset
|
2755 did_name = true; |
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diff
changeset
|
2756 } |
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diff
changeset
|
2757 } |
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diff
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|
2758 if (!did_name) |
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diff
changeset
|
2759 stream->print("%s", type2name(t)); |
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diff
changeset
|
2760 } |
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diff
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|
2761 if (at_old_sp) { |
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diff
changeset
|
2762 stream->print(" (%s of caller)", spname); |
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diff
changeset
|
2763 did_old_sp = true; |
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diff
changeset
|
2764 } |
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changeset
|
2765 stream->cr(); |
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diff
changeset
|
2766 sig_index += type2size[t]; |
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diff
changeset
|
2767 arg_index += 1; |
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|
2768 if (!at_this) ss.next(); |
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diff
changeset
|
2769 } |
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diff
changeset
|
2770 if (!did_old_sp) { |
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diff
changeset
|
2771 stream->print(" # "); |
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diff
changeset
|
2772 stream->move_to(tab1); |
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diff
changeset
|
2773 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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diff
changeset
|
2774 stream->print(" (%s of caller)", spname); |
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diff
changeset
|
2775 stream->cr(); |
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diff
changeset
|
2776 } |
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diff
changeset
|
2777 } |
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diff
changeset
|
2778 } |
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diff
changeset
|
2779 } |
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|
2780 |
0 | 2781 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2782 // First, find an oopmap in (begin, end]. | |
2783 // We use the odd half-closed interval so that oop maps and scope descs | |
2784 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2785 address base = code_begin(); |
0 | 2786 OopMapSet* oms = oop_maps(); |
2787 if (oms != NULL) { | |
2788 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2789 OopMap* om = oms->at(i); | |
2790 address pc = base + om->offset(); | |
2791 if (pc > begin) { | |
2792 if (pc <= end) { | |
100
c7c777385a15
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diff
changeset
|
2793 st->move_to(column); |
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diff
changeset
|
2794 st->print("; "); |
c7c777385a15
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diff
changeset
|
2795 om->print_on(st); |
0 | 2796 } |
2797 break; | |
2798 } | |
2799 } | |
2800 } | |
100
c7c777385a15
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diff
changeset
|
2801 |
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diff
changeset
|
2802 // Print any debug info present at this pc. |
0 | 2803 ScopeDesc* sd = scope_desc_in(begin, end); |
2804 if (sd != NULL) { | |
100
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diff
changeset
|
2805 st->move_to(column); |
0 | 2806 if (sd->bci() == SynchronizationEntryBCI) { |
2807 st->print(";*synchronization entry"); | |
2808 } else { | |
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da91efe96a93
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diff
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2809 if (sd->method() == NULL) { |
100
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diff
changeset
|
2810 st->print("method is NULL"); |
0 | 2811 } else if (sd->method()->is_native()) { |
100
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diff
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|
2812 st->print("method is native"); |
0 | 2813 } else { |
2142 | 2814 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2815 st->print(";*%s", Bytecodes::name(bc)); |
2816 switch (bc) { | |
2817 case Bytecodes::_invokevirtual: | |
2818 case Bytecodes::_invokespecial: | |
2819 case Bytecodes::_invokestatic: | |
2820 case Bytecodes::_invokeinterface: | |
2821 { | |
2142 | 2822 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2823 st->print(" "); |
2142 | 2824 if (invoke.name() != NULL) |
2825 invoke.name()->print_symbol_on(st); | |
0 | 2826 else |
2827 st->print("<UNKNOWN>"); | |
2828 break; | |
2829 } | |
2830 case Bytecodes::_getfield: | |
2831 case Bytecodes::_putfield: | |
2832 case Bytecodes::_getstatic: | |
2833 case Bytecodes::_putstatic: | |
2834 { | |
2142 | 2835 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2836 st->print(" "); |
2142 | 2837 if (field.name() != NULL) |
2838 field.name()->print_symbol_on(st); | |
0 | 2839 else |
2840 st->print("<UNKNOWN>"); | |
2841 } | |
2842 } | |
2843 } | |
2844 } | |
100
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diff
changeset
|
2845 |
0 | 2846 // Print all scopes |
2847 for (;sd != NULL; sd = sd->sender()) { | |
100
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diff
changeset
|
2848 st->move_to(column); |
0 | 2849 st->print("; -"); |
6725
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diff
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|
2850 if (sd->method() == NULL) { |
100
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diff
changeset
|
2851 st->print("method is NULL"); |
0 | 2852 } else { |
2853 sd->method()->print_short_name(st); | |
2854 } | |
2855 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2856 if (lineno != -1) { | |
2857 st->print("@%d (line %d)", sd->bci(), lineno); | |
2858 } else { | |
2859 st->print("@%d", sd->bci()); | |
2860 } | |
2861 st->cr(); | |
2862 } | |
2863 } | |
2864 | |
2865 // Print relocation information | |
2866 const char* str = reloc_string_for(begin, end); | |
2867 if (str != NULL) { | |
2868 if (sd != NULL) st->cr(); | |
100
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diff
changeset
|
2869 st->move_to(column); |
0 | 2870 st->print("; {%s}", str); |
2871 } | |
1748 | 2872 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2873 if (cont_offset != 0) { |
100
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diff
changeset
|
2874 st->move_to(column); |
1748 | 2875 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2876 } |
2877 | |
2878 } | |
2879 | |
100
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diff
changeset
|
2880 #ifndef PRODUCT |
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diff
changeset
|
2881 |
0 | 2882 void nmethod::print_value_on(outputStream* st) const { |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2883 st->print("nmethod"); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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2376
diff
changeset
|
2884 print_on(st, NULL); |
0 | 2885 } |
2886 | |
2887 void nmethod::print_calls(outputStream* st) { | |
2888 RelocIterator iter(this); | |
2889 while (iter.next()) { | |
2890 switch (iter.type()) { | |
2891 case relocInfo::virtual_call_type: | |
2892 case relocInfo::opt_virtual_call_type: { | |
2893 VerifyMutexLocker mc(CompiledIC_lock); | |
2894 CompiledIC_at(iter.reloc())->print(); | |
2895 break; | |
2896 } | |
2897 case relocInfo::static_call_type: | |
2898 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2899 compiledStaticCall_at(iter.reloc())->print(); | |
2900 break; | |
2901 } | |
2902 } | |
2903 } | |
2904 | |
2905 void nmethod::print_handler_table() { | |
2906 ExceptionHandlerTable(this).print(); | |
2907 } | |
2908 | |
2909 void nmethod::print_nul_chk_table() { | |
1748 | 2910 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2911 } |
2912 | |
2913 void nmethod::print_statistics() { | |
2914 ttyLocker ttyl; | |
2915 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2916 nmethod_stats.print_native_nmethod_stats(); | |
2917 nmethod_stats.print_nmethod_stats(); | |
2918 DebugInformationRecorder::print_statistics(); | |
2919 nmethod_stats.print_pc_stats(); | |
2920 Dependencies::print_statistics(); | |
2921 if (xtty != NULL) xtty->tail("statistics"); | |
2922 } | |
2923 | |
2924 #endif // PRODUCT |