Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 6271:93c71eb28866
7188911: nightly failures after JSR 292 lazy method handle update (round 2)
Reviewed-by: kvn, jrose
author | twisti |
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date | Tue, 07 Aug 2012 14:32:08 -0700 |
parents | 1d7922586cf6 |
children | 957c266d8bc5 da91efe96a93 |
rev | line source |
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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" | |
37 #include "oops/methodDataOop.hpp" | |
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 { \ | |
62 methodOop m = (method); \ | |
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 { \ | |
76 methodOop m = (method); \ | |
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) { | |
498 // create nmethod | |
499 nmethod* nm = NULL; | |
500 { | |
501 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
502 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
503 CodeOffsets offsets; | |
504 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
505 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
506 nm = new (native_nmethod_size) | |
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507 nmethod(method(), native_nmethod_size, compile_id, &offsets, |
0 | 508 code_buffer, frame_size, |
509 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
510 oop_maps); | |
511 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
512 if (PrintAssembly && nm != NULL) | |
513 Disassembler::decode(nm); | |
514 } | |
515 // verify nmethod | |
516 debug_only(if (nm) nm->verify();) // might block | |
517 | |
518 if (nm != NULL) { | |
519 nm->log_new_nmethod(); | |
520 } | |
521 | |
522 return nm; | |
523 } | |
524 | |
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525 #ifdef HAVE_DTRACE_H |
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526 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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527 CodeBuffer *code_buffer, |
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528 int vep_offset, |
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529 int trap_offset, |
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530 int frame_complete, |
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531 int frame_size) { |
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532 // create nmethod |
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533 nmethod* nm = NULL; |
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534 { |
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535 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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536 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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537 CodeOffsets offsets; |
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538 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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539 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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540 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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541 |
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542 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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543 |
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544 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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545 if (PrintAssembly && nm != NULL) |
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546 Disassembler::decode(nm); |
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547 } |
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548 // verify nmethod |
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549 debug_only(if (nm) nm->verify();) // might block |
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550 |
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551 if (nm != NULL) { |
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552 nm->log_new_nmethod(); |
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553 } |
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554 |
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555 return nm; |
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556 } |
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557 |
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558 #endif // def HAVE_DTRACE_H |
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559 |
0 | 560 nmethod* nmethod::new_nmethod(methodHandle method, |
561 int compile_id, | |
562 int entry_bci, | |
563 CodeOffsets* offsets, | |
564 int orig_pc_offset, | |
565 DebugInformationRecorder* debug_info, | |
566 Dependencies* dependencies, | |
567 CodeBuffer* code_buffer, int frame_size, | |
568 OopMapSet* oop_maps, | |
569 ExceptionHandlerTable* handler_table, | |
570 ImplicitExceptionTable* nul_chk_table, | |
571 AbstractCompiler* compiler, | |
572 int comp_level | |
573 ) | |
574 { | |
575 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
576 // create nmethod | |
577 nmethod* nm = NULL; | |
578 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
579 int nmethod_size = | |
580 allocation_size(code_buffer, sizeof(nmethod)) | |
581 + adjust_pcs_size(debug_info->pcs_size()) | |
582 + round_to(dependencies->size_in_bytes() , oopSize) | |
583 + round_to(handler_table->size_in_bytes(), oopSize) | |
584 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
585 + round_to(debug_info->data_size() , oopSize); | |
586 nm = new (nmethod_size) | |
587 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
588 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
589 oop_maps, | |
590 handler_table, | |
591 nul_chk_table, | |
592 compiler, | |
593 comp_level); | |
594 if (nm != NULL) { | |
595 // To make dependency checking during class loading fast, record | |
596 // the nmethod dependencies in the classes it is dependent on. | |
597 // This allows the dependency checking code to simply walk the | |
598 // class hierarchy above the loaded class, checking only nmethods | |
599 // which are dependent on those classes. The slow way is to | |
600 // check every nmethod for dependencies which makes it linear in | |
601 // the number of methods compiled. For applications with a lot | |
602 // classes the slow way is too slow. | |
603 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
604 klassOop klass = deps.context_type(); | |
605 if (klass == NULL) continue; // ignore things like evol_method | |
606 | |
607 // record this nmethod as dependent on this klass | |
608 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
609 } | |
610 } | |
611 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
612 if (PrintAssembly && nm != NULL) | |
613 Disassembler::decode(nm); | |
614 } | |
615 | |
616 // verify nmethod | |
617 debug_only(if (nm) nm->verify();) // might block | |
618 | |
619 if (nm != NULL) { | |
620 nm->log_new_nmethod(); | |
621 } | |
622 | |
623 // done | |
624 return nm; | |
625 } | |
626 | |
627 | |
628 // For native wrappers | |
629 nmethod::nmethod( | |
630 methodOop method, | |
631 int nmethod_size, | |
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632 int compile_id, |
0 | 633 CodeOffsets* offsets, |
634 CodeBuffer* code_buffer, | |
635 int frame_size, | |
636 ByteSize basic_lock_owner_sp_offset, | |
637 ByteSize basic_lock_sp_offset, | |
638 OopMapSet* oop_maps ) | |
639 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
640 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 641 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
642 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 643 { |
644 { | |
645 debug_only(No_Safepoint_Verifier nsv;) | |
646 assert_locked_or_safepoint(CodeCache_lock); | |
647 | |
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648 init_defaults(); |
0 | 649 _method = method; |
650 _entry_bci = InvocationEntryBci; | |
651 // We have no exception handler or deopt handler make the | |
652 // values something that will never match a pc like the nmethod vtable entry | |
653 _exception_offset = 0; | |
654 _deoptimize_offset = 0; | |
1204 | 655 _deoptimize_mh_offset = 0; |
0 | 656 _orig_pc_offset = 0; |
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657 |
1748 | 658 _consts_offset = data_offset(); |
0 | 659 _stub_offset = data_offset(); |
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660 _oops_offset = data_offset(); |
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661 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 662 _scopes_pcs_offset = _scopes_data_offset; |
663 _dependencies_offset = _scopes_pcs_offset; | |
664 _handler_table_offset = _dependencies_offset; | |
665 _nul_chk_table_offset = _handler_table_offset; | |
666 _nmethod_end_offset = _nul_chk_table_offset; | |
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667 _compile_id = compile_id; |
0 | 668 _comp_level = CompLevel_none; |
1748 | 669 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
670 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 671 _osr_entry_point = NULL; |
672 _exception_cache = NULL; | |
673 _pc_desc_cache.reset_to(NULL); | |
674 | |
675 code_buffer->copy_oops_to(this); | |
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676 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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677 CodeCache::add_scavenge_root_nmethod(this); |
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678 } |
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679 debug_only(verify_scavenge_root_oops()); |
0 | 680 CodeCache::commit(this); |
681 } | |
682 | |
683 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
684 ttyLocker ttyl; // keep the following output all in one block | |
685 // This output goes directly to the tty, not the compiler log. | |
686 // To enable tools to match it up with the compilation activity, | |
687 // be sure to tag this tty output with the compile ID. | |
688 if (xtty != NULL) { | |
689 xtty->begin_head("print_native_nmethod"); | |
690 xtty->method(_method); | |
691 xtty->stamp(); | |
692 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
693 } | |
694 // print the header part first | |
695 print(); | |
696 // then print the requested information | |
697 if (PrintNativeNMethods) { | |
698 print_code(); | |
699 oop_maps->print(); | |
700 } | |
701 if (PrintRelocations) { | |
702 print_relocations(); | |
703 } | |
704 if (xtty != NULL) { | |
705 xtty->tail("print_native_nmethod"); | |
706 } | |
707 } | |
708 } | |
709 | |
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710 // For dtrace wrappers |
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711 #ifdef HAVE_DTRACE_H |
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712 nmethod::nmethod( |
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713 methodOop method, |
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714 int nmethod_size, |
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715 CodeOffsets* offsets, |
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716 CodeBuffer* code_buffer, |
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717 int frame_size) |
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718 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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719 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 720 _native_receiver_sp_offset(in_ByteSize(-1)), |
721 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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722 { |
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723 { |
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724 debug_only(No_Safepoint_Verifier nsv;) |
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725 assert_locked_or_safepoint(CodeCache_lock); |
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726 |
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727 init_defaults(); |
116
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728 _method = method; |
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729 _entry_bci = InvocationEntryBci; |
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730 // We have no exception handler or deopt handler make the |
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731 // values something that will never match a pc like the nmethod vtable entry |
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732 _exception_offset = 0; |
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733 _deoptimize_offset = 0; |
1204 | 734 _deoptimize_mh_offset = 0; |
1378
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735 _unwind_handler_offset = -1; |
116
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736 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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737 _orig_pc_offset = 0; |
1748 | 738 _consts_offset = data_offset(); |
116
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739 _stub_offset = data_offset(); |
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740 _oops_offset = data_offset(); |
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741 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
116
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742 _scopes_pcs_offset = _scopes_data_offset; |
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743 _dependencies_offset = _scopes_pcs_offset; |
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744 _handler_table_offset = _dependencies_offset; |
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745 _nul_chk_table_offset = _handler_table_offset; |
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746 _nmethod_end_offset = _nul_chk_table_offset; |
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747 _compile_id = 0; // default |
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748 _comp_level = CompLevel_none; |
1748 | 749 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
750 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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751 _osr_entry_point = NULL; |
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752 _exception_cache = NULL; |
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753 _pc_desc_cache.reset_to(NULL); |
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754 |
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755 code_buffer->copy_oops_to(this); |
989
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756 debug_only(verify_scavenge_root_oops()); |
116
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757 CodeCache::commit(this); |
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758 } |
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759 |
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760 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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761 ttyLocker ttyl; // keep the following output all in one block |
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762 // This output goes directly to the tty, not the compiler log. |
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763 // To enable tools to match it up with the compilation activity, |
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764 // be sure to tag this tty output with the compile ID. |
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765 if (xtty != NULL) { |
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766 xtty->begin_head("print_dtrace_nmethod"); |
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767 xtty->method(_method); |
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768 xtty->stamp(); |
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769 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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770 } |
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771 // print the header part first |
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772 print(); |
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773 // then print the requested information |
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774 if (PrintNMethods) { |
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775 print_code(); |
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776 } |
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777 if (PrintRelocations) { |
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778 print_relocations(); |
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779 } |
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780 if (xtty != NULL) { |
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781 xtty->tail("print_dtrace_nmethod"); |
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782 } |
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783 } |
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784 } |
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785 #endif // def HAVE_DTRACE_H |
0 | 786 |
787 void* nmethod::operator new(size_t size, int nmethod_size) { | |
788 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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789 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 790 return CodeCache::allocate(nmethod_size); |
791 } | |
792 | |
793 | |
794 nmethod::nmethod( | |
795 methodOop method, | |
796 int nmethod_size, | |
797 int compile_id, | |
798 int entry_bci, | |
799 CodeOffsets* offsets, | |
800 int orig_pc_offset, | |
801 DebugInformationRecorder* debug_info, | |
802 Dependencies* dependencies, | |
803 CodeBuffer *code_buffer, | |
804 int frame_size, | |
805 OopMapSet* oop_maps, | |
806 ExceptionHandlerTable* handler_table, | |
807 ImplicitExceptionTable* nul_chk_table, | |
808 AbstractCompiler* compiler, | |
809 int comp_level | |
810 ) | |
811 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
812 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 813 _native_receiver_sp_offset(in_ByteSize(-1)), |
814 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 815 { |
816 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
817 { | |
818 debug_only(No_Safepoint_Verifier nsv;) | |
819 assert_locked_or_safepoint(CodeCache_lock); | |
820 | |
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821 init_defaults(); |
0 | 822 _method = method; |
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823 _entry_bci = entry_bci; |
0 | 824 _compile_id = compile_id; |
825 _comp_level = comp_level; | |
826 _compiler = compiler; | |
827 _orig_pc_offset = orig_pc_offset; | |
1748 | 828 |
829 // Section offsets | |
1762
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830 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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831 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 832 |
833 // Exception handler and deopt handler are in the stub section | |
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834 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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835 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 836 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
837 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
2083
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838 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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839 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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840 } else { |
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841 _deoptimize_mh_offset = -1; |
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842 } |
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843 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 844 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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845 } else { |
1748 | 846 _unwind_handler_offset = -1; |
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847 } |
1748 | 848 |
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849 _oops_offset = data_offset(); |
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850 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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851 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 852 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
853 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
854 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
855 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
856 | |
1748 | 857 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
858 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
859 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 860 _exception_cache = NULL; |
861 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
862 | |
863 // Copy contents of ScopeDescRecorder to nmethod | |
864 code_buffer->copy_oops_to(this); | |
865 debug_info->copy_to(this); | |
866 dependencies->copy_to(this); | |
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867 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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868 CodeCache::add_scavenge_root_nmethod(this); |
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869 } |
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870 debug_only(verify_scavenge_root_oops()); |
0 | 871 |
872 CodeCache::commit(this); | |
873 | |
874 // Copy contents of ExceptionHandlerTable to nmethod | |
875 handler_table->copy_to(this); | |
876 nul_chk_table->copy_to(this); | |
877 | |
878 // we use the information of entry points to find out if a method is | |
879 // static or non static | |
880 assert(compiler->is_c2() || | |
881 _method->is_static() == (entry_point() == _verified_entry_point), | |
882 " entry points must be same for static methods and vice versa"); | |
883 } | |
884 | |
100
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885 bool printnmethods = PrintNMethods |
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886 || CompilerOracle::should_print(_method) |
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887 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 888 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
889 print_nmethod(printnmethods); | |
890 } | |
891 } | |
892 | |
893 | |
894 // Print a short set of xml attributes to identify this nmethod. The | |
895 // output should be embedded in some other element. | |
896 void nmethod::log_identity(xmlStream* log) const { | |
897 log->print(" compile_id='%d'", compile_id()); | |
898 const char* nm_kind = compile_kind(); | |
899 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
900 if (compiler() != NULL) { | |
901 log->print(" compiler='%s'", compiler()->name()); | |
902 } | |
1783 | 903 if (TieredCompilation) { |
904 log->print(" level='%d'", comp_level()); | |
905 } | |
0 | 906 } |
907 | |
908 | |
909 #define LOG_OFFSET(log, name) \ | |
910 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
911 log->print(" " XSTR(name) "_offset='%d'" , \ | |
912 (intptr_t)name##_begin() - (intptr_t)this) | |
913 | |
914 | |
915 void nmethod::log_new_nmethod() const { | |
916 if (LogCompilation && xtty != NULL) { | |
917 ttyLocker ttyl; | |
918 HandleMark hm; | |
919 xtty->begin_elem("nmethod"); | |
920 log_identity(xtty); | |
1748 | 921 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 922 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
923 | |
924 LOG_OFFSET(xtty, relocation); | |
1762
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925 LOG_OFFSET(xtty, consts); |
1748 | 926 LOG_OFFSET(xtty, insts); |
0 | 927 LOG_OFFSET(xtty, stub); |
928 LOG_OFFSET(xtty, scopes_data); | |
929 LOG_OFFSET(xtty, scopes_pcs); | |
930 LOG_OFFSET(xtty, dependencies); | |
931 LOG_OFFSET(xtty, handler_table); | |
932 LOG_OFFSET(xtty, nul_chk_table); | |
933 LOG_OFFSET(xtty, oops); | |
934 | |
935 xtty->method(method()); | |
936 xtty->stamp(); | |
937 xtty->end_elem(); | |
938 } | |
939 } | |
940 | |
941 #undef LOG_OFFSET | |
942 | |
943 | |
944 // Print out more verbose output usually for a newly created nmethod. | |
2405
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945 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 946 if (st != NULL) { |
947 ttyLocker ttyl; | |
6266
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948 if (WizardMode) { |
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949 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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950 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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951 } else { |
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952 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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953 } |
0 | 954 } |
955 } | |
956 | |
957 | |
958 void nmethod::print_nmethod(bool printmethod) { | |
959 ttyLocker ttyl; // keep the following output all in one block | |
960 if (xtty != NULL) { | |
961 xtty->begin_head("print_nmethod"); | |
962 xtty->stamp(); | |
963 xtty->end_head(); | |
964 } | |
965 // print the header part first | |
966 print(); | |
967 // then print the requested information | |
968 if (printmethod) { | |
969 print_code(); | |
970 print_pcs(); | |
6266
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971 if (oop_maps()) { |
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972 oop_maps()->print(); |
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973 } |
0 | 974 } |
975 if (PrintDebugInfo) { | |
976 print_scopes(); | |
977 } | |
978 if (PrintRelocations) { | |
979 print_relocations(); | |
980 } | |
981 if (PrintDependencies) { | |
982 print_dependencies(); | |
983 } | |
984 if (PrintExceptionHandlers) { | |
985 print_handler_table(); | |
986 print_nul_chk_table(); | |
987 } | |
988 if (xtty != NULL) { | |
989 xtty->tail("print_nmethod"); | |
990 } | |
991 } | |
992 | |
993 | |
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994 // Promote one word from an assembly-time handle to a live embedded oop. |
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995 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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996 if (handle == NULL || |
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997 // As a special case, IC oops are initialized to 1 or -1. |
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998 handle == (jobject) Universe::non_oop_word()) { |
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999 (*dest) = (oop) handle; |
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1000 } else { |
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1001 (*dest) = JNIHandles::resolve_non_null(handle); |
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1002 } |
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1003 } |
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1004 |
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1005 |
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1006 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1007 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1008 int length = array->length(); |
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1009 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1010 oop* dest = oops_begin(); |
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1011 for (int index = 0 ; index < length; index++) { |
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1012 initialize_immediate_oop(&dest[index], array->at(index)); |
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1013 } |
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1014 |
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1015 // Now we can fix up all the oops in the code. We need to do this |
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1016 // in the code because the assembler uses jobjects as placeholders. |
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1017 // The code and relocations have already been initialized by the |
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1018 // CodeBlob constructor, so it is valid even at this early point to |
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1019 // iterate over relocations and patch the code. |
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1020 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1021 } |
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1022 |
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1023 |
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1024 bool nmethod::is_at_poll_return(address pc) { |
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1025 RelocIterator iter(this, pc, pc+1); |
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1026 while (iter.next()) { |
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1027 if (iter.type() == relocInfo::poll_return_type) |
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1028 return true; |
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1029 } |
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1030 return false; |
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1031 } |
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1032 |
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1033 |
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1034 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1035 RelocIterator iter(this, pc, pc+1); |
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1036 while (iter.next()) { |
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1037 relocInfo::relocType t = iter.type(); |
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1038 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1039 return true; |
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1040 } |
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1041 return false; |
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1042 } |
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1043 |
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1044 |
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1045 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1046 // re-patch all oop-bearing instructions, just in case some oops moved |
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1047 RelocIterator iter(this, begin, end); |
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1048 while (iter.next()) { |
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1049 if (iter.type() == relocInfo::oop_type) { |
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1050 oop_Relocation* reloc = iter.oop_reloc(); |
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1051 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1052 oop* dest = reloc->oop_addr(); |
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1053 initialize_immediate_oop(dest, (jobject) *dest); |
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1054 } |
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1055 // Refresh the oop-related bits of this instruction. |
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1056 reloc->fix_oop_relocation(); |
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1057 } |
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1058 |
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1059 // There must not be any interfering patches or breakpoints. |
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1060 assert(!(iter.type() == relocInfo::breakpoint_type |
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1061 && iter.breakpoint_reloc()->active()), |
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1062 "no active breakpoint"); |
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1063 } |
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1064 } |
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1065 |
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1066 |
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1067 void nmethod::verify_oop_relocations() { |
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1068 // Ensure sure that the code matches the current oop values |
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1069 RelocIterator iter(this, NULL, NULL); |
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1070 while (iter.next()) { |
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1071 if (iter.type() == relocInfo::oop_type) { |
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1072 oop_Relocation* reloc = iter.oop_reloc(); |
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1073 if (!reloc->oop_is_immediate()) { |
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1074 reloc->verify_oop_relocation(); |
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1075 } |
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1076 } |
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1077 } |
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1078 } |
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1079 |
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1080 |
0 | 1081 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1082 PcDesc* pd = pc_desc_at(pc); | |
1083 guarantee(pd != NULL, "scope must be present"); | |
1084 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1085 pd->obj_decode_offset(), pd->should_reexecute(), |
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1086 pd->return_oop()); |
0 | 1087 } |
1088 | |
1089 | |
1090 void nmethod::clear_inline_caches() { | |
1091 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1092 if (is_zombie()) { | |
1093 return; | |
1094 } | |
1095 | |
1096 RelocIterator iter(this); | |
1097 while (iter.next()) { | |
1098 iter.reloc()->clear_inline_cache(); | |
1099 } | |
1100 } | |
1101 | |
1102 | |
1103 void nmethod::cleanup_inline_caches() { | |
1104 | |
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1105 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1106 |
1107 // If the method is not entrant or zombie then a JMP is plastered over the | |
1108 // first few bytes. If an oop in the old code was there, that oop | |
1109 // should not get GC'd. Skip the first few bytes of oops on | |
1110 // not-entrant methods. | |
1111 address low_boundary = verified_entry_point(); | |
1112 if (!is_in_use()) { | |
1113 low_boundary += NativeJump::instruction_size; | |
1114 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1115 // This means that the low_boundary is going to be a little too high. | |
1116 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1117 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1118 } | |
1119 | |
1120 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1121 ResourceMark rm; | |
1122 RelocIterator iter(this, low_boundary); | |
1123 while(iter.next()) { | |
1124 switch(iter.type()) { | |
1125 case relocInfo::virtual_call_type: | |
1126 case relocInfo::opt_virtual_call_type: { | |
1127 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1128 // Ok, to lookup references to zombies here | |
1129 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1130 if( cb != NULL && cb->is_nmethod() ) { | |
1131 nmethod* nm = (nmethod*)cb; | |
1132 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1133 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1134 } |
1135 break; | |
1136 } | |
1137 case relocInfo::static_call_type: { | |
1138 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1139 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1140 if( cb != NULL && cb->is_nmethod() ) { | |
1141 nmethod* nm = (nmethod*)cb; | |
1142 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1143 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1144 } |
1145 break; | |
1146 } | |
1147 } | |
1148 } | |
1149 } | |
1150 | |
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1151 // This is a private interface with the sweeper. |
0 | 1152 void nmethod::mark_as_seen_on_stack() { |
1153 assert(is_not_entrant(), "must be a non-entrant method"); | |
1644
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1154 // Set the traversal mark to ensure that the sweeper does 2 |
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1155 // cleaning passes before moving to zombie. |
0 | 1156 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1157 } | |
1158 | |
2342
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1159 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1160 // there are no activations on the stack, not in use by the VM, |
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1161 // and not in use by the ServiceThread) |
0 | 1162 bool nmethod::can_not_entrant_be_converted() { |
1163 assert(is_not_entrant(), "must be a non-entrant method"); | |
1164 | |
1165 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1166 // count can be greater than the stack traversal count before it hits the | |
1167 // nmethod for the second time. | |
2342
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1168 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1169 !is_locked_by_vm(); |
0 | 1170 } |
1171 | |
1172 void nmethod::inc_decompile_count() { | |
1783 | 1173 if (!is_compiled_by_c2()) return; |
0 | 1174 // Could be gated by ProfileTraps, but do not bother... |
1175 methodOop m = method(); | |
1176 if (m == NULL) return; | |
1177 methodDataOop mdo = m->method_data(); | |
1178 if (mdo == NULL) return; | |
1179 // There is a benign race here. See comments in methodDataOop.hpp. | |
1180 mdo->inc_decompile_count(); | |
1181 } | |
1182 | |
1183 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1184 | |
1185 post_compiled_method_unload(); | |
1186 | |
1187 // Since this nmethod is being unloaded, make sure that dependencies | |
1188 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1189 // indicate that this work is being done during a GC. | |
1190 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1191 assert(is_alive != NULL, "Should be non-NULL"); | |
1192 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1193 flush_dependencies(is_alive); | |
1194 | |
1195 // Break cycle between nmethod & method | |
1196 if (TraceClassUnloading && WizardMode) { | |
1197 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1198 " unloadable], methodOop(" INTPTR_FORMAT | |
1199 "), cause(" INTPTR_FORMAT ")", | |
1200 this, (address)_method, (address)cause); | |
989
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1201 if (!Universe::heap()->is_gc_active()) |
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1202 cause->klass()->print(); |
0 | 1203 } |
941 | 1204 // Unlink the osr method, so we do not look this up again |
1205 if (is_osr_method()) { | |
1206 invalidate_osr_method(); | |
1207 } | |
0 | 1208 // If _method is already NULL the methodOop is about to be unloaded, |
1209 // so we don't have to break the cycle. Note that it is possible to | |
1210 // have the methodOop live here, in case we unload the nmethod because | |
1211 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1212 if (_method != NULL) { | |
1213 // OSR methods point to the methodOop, but the methodOop does not | |
1214 // point back! | |
1215 if (_method->code() == this) { | |
1216 _method->clear_code(); // Break a cycle | |
1217 } | |
1218 _method = NULL; // Clear the method of this dead nmethod | |
1219 } | |
1220 // Make the class unloaded - i.e., change state and notify sweeper | |
1538
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1221 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1222 if (is_in_use()) { |
1223 // Transitioning directly from live to unloaded -- so | |
1224 // we need to force a cache clean-up; remember this | |
1225 // for later on. | |
1226 CodeCache::set_needs_cache_clean(true); | |
1227 } | |
1644
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1228 _state = unloaded; |
0 | 1229 |
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1230 // Log the unloading. |
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1231 log_state_change(); |
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1232 |
0 | 1233 // The methodOop is gone at this point |
1234 assert(_method == NULL, "Tautology"); | |
1235 | |
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1236 set_osr_link(NULL); |
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1237 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1238 NMethodSweeper::notify(this); |
1239 } | |
1240 | |
1241 void nmethod::invalidate_osr_method() { | |
1242 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1243 // Remove from list of active nmethods | |
1244 if (method() != NULL) | |
1245 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1246 // Set entry as invalid | |
1247 _entry_bci = InvalidOSREntryBci; | |
1248 } | |
1249 | |
1109
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1250 void nmethod::log_state_change() const { |
0 | 1251 if (LogCompilation) { |
1252 if (xtty != NULL) { | |
1253 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1254 if (_state == unloaded) { |
1109
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1255 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1256 os::current_thread_id()); |
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1257 } else { |
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1258 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1259 os::current_thread_id(), |
1644
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1260 (_state == zombie ? " zombie='1'" : "")); |
1109
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1261 } |
0 | 1262 log_identity(xtty); |
1263 xtty->stamp(); | |
1264 xtty->end_elem(); | |
1265 } | |
1266 } | |
1644
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1267 if (PrintCompilation && _state != unloaded) { |
2405
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1268 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1269 } |
1270 } | |
1271 | |
1272 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1273 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1274 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1275 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1276 |
1644
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1277 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1278 nmethodLocker nml(this); |
1644
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1279 methodHandle the_method(method()); |
1726 | 1280 No_Safepoint_Verifier nsv; |
0 | 1281 |
1282 { | |
1109
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1283 // invalidate osr nmethod before acquiring the patching lock since |
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1284 // they both acquire leaf locks and we don't want a deadlock. |
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1285 // This logic is equivalent to the logic below for patching the |
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1286 // verified entry point of regular methods. |
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1287 if (is_osr_method()) { |
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1288 // this effectively makes the osr nmethod not entrant |
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1289 invalidate_osr_method(); |
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1290 } |
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1291 |
0 | 1292 // Enter critical section. Does not block for safepoint. |
1293 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1294 |
1644
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1295 if (_state == state) { |
1109
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1296 // another thread already performed this transition so nothing |
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1297 // to do, but return false to indicate this. |
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1298 return false; |
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1299 } |
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1300 |
0 | 1301 // The caller can be calling the method statically or through an inline |
1302 // cache call. | |
1109
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1303 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1304 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1305 SharedRuntime::get_handle_wrong_method_stub()); | |
1306 } | |
1307 | |
1644
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1308 if (is_in_use()) { |
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1309 // It's a true state change, so mark the method as decompiled. |
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1310 // Do it only for transition from alive. |
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1311 inc_decompile_count(); |
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1312 } |
1206
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1313 |
0 | 1314 // Change state |
1644
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1315 _state = state; |
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1316 |
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1317 // Log the transition once |
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1318 log_state_change(); |
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1319 |
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1320 // Remove nmethod from method. |
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1321 // We need to check if both the _code and _from_compiled_code_entry_point |
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1322 // refer to this nmethod because there is a race in setting these two fields |
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1323 // in methodOop as seen in bugid 4947125. |
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1324 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1325 // could be flushed and the compiler and vtable stubs could still call |
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1326 // through it. |
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1327 if (method() != NULL && (method()->code() == this || |
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1328 method()->from_compiled_entry() == verified_entry_point())) { |
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1329 HandleMark hm; |
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1330 method()->clear_code(); |
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1331 } |
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1332 |
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1333 if (state == not_entrant) { |
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1334 mark_as_seen_on_stack(); |
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1335 } |
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1336 |
0 | 1337 } // leave critical region under Patching_lock |
1338 | |
1538
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1339 // When the nmethod becomes zombie it is no longer alive so the |
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1340 // dependencies must be flushed. nmethods in the not_entrant |
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1341 // state will be flushed later when the transition to zombie |
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1342 // happens or they get unloaded. |
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1343 if (state == zombie) { |
1726 | 1344 { |
1345 // Flushing dependecies must be done before any possible | |
1346 // safepoint can sneak in, otherwise the oops used by the | |
1347 // dependency logic could have become stale. | |
1348 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1349 flush_dependencies(NULL); | |
1350 } | |
1644
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1351 |
2342
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1352 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1353 // event and it hasn't already been reported for this nmethod then |
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1354 // report it now. The event may have been reported earilier if the GC |
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1355 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1356 // we no longer go to a safepoint here. |
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1357 post_compiled_method_unload(); |
1726 | 1358 |
1359 #ifdef ASSERT | |
1360 // It's no longer safe to access the oops section since zombie | |
1361 // nmethods aren't scanned for GC. | |
1362 _oops_are_stale = true; | |
1363 #endif | |
1538
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1364 } else { |
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1365 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1366 } |
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1367 |
0 | 1368 if (TraceCreateZombies) { |
1369 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1370 } | |
1371 | |
1372 // Make sweeper aware that there is a zombie method that needs to be removed | |
1373 NMethodSweeper::notify(this); | |
1374 | |
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1375 return true; |
0 | 1376 } |
1377 | |
1378 void nmethod::flush() { | |
1379 // Note that there are no valid oops in the nmethod anymore. | |
1380 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1381 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1382 | |
1383 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1384 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1385 |
1386 // completely deallocate this method | |
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1387 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1388 if (PrintMethodFlushing) { |
1202 | 1389 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1390 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1391 } |
1392 | |
1393 // We need to deallocate any ExceptionCache data. | |
1394 // Note that we do not need to grab the nmethod lock for this, it | |
1395 // better be thread safe if we're disposing of it! | |
1396 ExceptionCache* ec = exception_cache(); | |
1397 set_exception_cache(NULL); | |
1398 while(ec != NULL) { | |
1399 ExceptionCache* next = ec->next(); | |
1400 delete ec; | |
1401 ec = next; | |
1402 } | |
1403 | |
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1404 if (on_scavenge_root_list()) { |
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1405 CodeCache::drop_scavenge_root_nmethod(this); |
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1406 } |
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1407 |
1202 | 1408 if (is_speculatively_disconnected()) { |
1409 CodeCache::remove_saved_code(this); | |
1410 } | |
1411 | |
1692 | 1412 #ifdef SHARK |
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1413 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1414 #endif // SHARK |
1415 | |
0 | 1416 ((CodeBlob*)(this))->flush(); |
1417 | |
1418 CodeCache::free(this); | |
1419 } | |
1420 | |
1421 | |
1422 // | |
1423 // Notify all classes this nmethod is dependent on that it is no | |
1424 // longer dependent. This should only be called in two situations. | |
1425 // First, when a nmethod transitions to a zombie all dependents need | |
1426 // to be clear. Since zombification happens at a safepoint there's no | |
1427 // synchronization issues. The second place is a little more tricky. | |
1428 // During phase 1 of mark sweep class unloading may happen and as a | |
1429 // result some nmethods may get unloaded. In this case the flushing | |
1430 // of dependencies must happen during phase 1 since after GC any | |
1431 // dependencies in the unloaded nmethod won't be updated, so | |
1432 // traversing the dependency information in unsafe. In that case this | |
1433 // function is called with a non-NULL argument and this function only | |
1434 // notifies instanceKlasses that are reachable | |
1435 | |
1436 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1437 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1438 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1439 "is_alive is non-NULL if and only if we are called during GC"); | |
1440 if (!has_flushed_dependencies()) { | |
1441 set_has_flushed_dependencies(); | |
1442 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1443 klassOop klass = deps.context_type(); | |
1444 if (klass == NULL) continue; // ignore things like evol_method | |
1445 | |
1446 // During GC the is_alive closure is non-NULL, and is used to | |
1447 // determine liveness of dependees that need to be updated. | |
1448 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1449 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1450 } | |
1451 } | |
1452 } | |
1453 } | |
1454 | |
1455 | |
1456 // If this oop is not live, the nmethod can be unloaded. | |
1457 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1458 OopClosure* keep_alive, | |
1459 oop* root, bool unloading_occurred) { | |
1460 assert(root != NULL, "just checking"); | |
1461 oop obj = *root; | |
1462 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1463 return false; | |
1464 } | |
1465 if (obj->is_compiledICHolder()) { | |
1466 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1467 if (is_alive->do_object_b( | |
1468 cichk_oop->holder_method()->method_holder()) && | |
1469 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1470 // The oop should be kept alive | |
1471 keep_alive->do_oop(root); | |
1472 return false; | |
1473 } | |
1474 } | |
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1475 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1476 // simply because one of its constant oops has gone dead. |
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1477 // No actual classes need to be unloaded in order for this to occur. |
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1478 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1479 make_unloaded(is_alive, obj); |
1480 return true; | |
1481 } | |
1482 | |
1483 // ------------------------------------------------------------------ | |
1484 // post_compiled_method_load_event | |
1485 // new method for install_code() path | |
1486 // Transfer information from compilation to jvmti | |
1487 void nmethod::post_compiled_method_load_event() { | |
1488 | |
1489 methodOop moop = method(); | |
4006 | 1490 #ifndef USDT2 |
0 | 1491 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1492 moop->klass_name()->bytes(), | |
1493 moop->klass_name()->utf8_length(), | |
1494 moop->name()->bytes(), | |
1495 moop->name()->utf8_length(), | |
1496 moop->signature()->bytes(), | |
1497 moop->signature()->utf8_length(), | |
1748 | 1498 insts_begin(), insts_size()); |
4006 | 1499 #else /* USDT2 */ |
1500 HOTSPOT_COMPILED_METHOD_LOAD( | |
1501 (char *) moop->klass_name()->bytes(), | |
1502 moop->klass_name()->utf8_length(), | |
1503 (char *) moop->name()->bytes(), | |
1504 moop->name()->utf8_length(), | |
1505 (char *) moop->signature()->bytes(), | |
1506 moop->signature()->utf8_length(), | |
1507 insts_begin(), insts_size()); | |
1508 #endif /* USDT2 */ | |
0 | 1509 |
1616
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1510 if (JvmtiExport::should_post_compiled_method_load() || |
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1511 JvmtiExport::should_post_compiled_method_unload()) { |
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1512 get_and_cache_jmethod_id(); |
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1513 } |
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1514 |
0 | 1515 if (JvmtiExport::should_post_compiled_method_load()) { |
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1516 // Let the Service thread (which is a real Java thread) post the event |
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1517 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1518 JvmtiDeferredEventQueue::enqueue( |
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1519 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1520 } |
1521 } | |
1522 | |
1616
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1523 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1524 if (_jmethod_id == NULL) { |
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1525 // Cache the jmethod_id since it can no longer be looked up once the |
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1526 // method itself has been marked for unloading. |
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1527 _jmethod_id = method()->jmethod_id(); |
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1528 } |
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1529 return _jmethod_id; |
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1530 } |
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1531 |
0 | 1532 void nmethod::post_compiled_method_unload() { |
1577
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1533 if (unload_reported()) { |
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1534 // During unloading we transition to unloaded and then to zombie |
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1535 // and the unloading is reported during the first transition. |
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1536 return; |
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1537 } |
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1538 |
0 | 1539 assert(_method != NULL && !is_unloaded(), "just checking"); |
1540 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1541 | |
1542 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1543 // post the event. Sometime later this nmethod will be made a zombie |
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1544 // by the sweeper but the methodOop will not be valid at that point. |
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1545 // If the _jmethod_id is null then no load event was ever requested |
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1546 // so don't bother posting the unload. The main reason for this is |
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1547 // that the jmethodID is a weak reference to the methodOop so if |
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1548 // it's being unloaded there's no way to look it up since the weak |
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1549 // ref will have been cleared. |
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1550 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1551 assert(!unload_reported(), "already unloaded"); |
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1552 JvmtiDeferredEvent event = |
2342
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1553 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1554 _jmethod_id, insts_begin()); |
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1555 if (SafepointSynchronize::is_at_safepoint()) { |
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1556 // Don't want to take the queueing lock. Add it as pending and |
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1557 // it will get enqueued later. |
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1558 JvmtiDeferredEventQueue::add_pending_event(event); |
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1559 } else { |
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1560 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1561 JvmtiDeferredEventQueue::enqueue(event); |
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1562 } |
0 | 1563 } |
1564 | |
1565 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1566 // any time. As the nmethod is being unloaded now we mark it has | |
1567 // having the unload event reported - this will ensure that we don't | |
1568 // attempt to report the event in the unlikely scenario where the | |
1569 // event is enabled at the time the nmethod is made a zombie. | |
1570 set_unload_reported(); | |
1571 } | |
1572 | |
1573 // This is called at the end of the strong tracing/marking phase of a | |
1574 // GC to unload an nmethod if it contains otherwise unreachable | |
1575 // oops. | |
1576 | |
1577 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1578 OopClosure* keep_alive, bool unloading_occurred) { | |
1579 // Make sure the oop's ready to receive visitors | |
1580 assert(!is_zombie() && !is_unloaded(), | |
1581 "should not call follow on zombie or unloaded nmethod"); | |
1582 | |
1583 // If the method is not entrant then a JMP is plastered over the | |
1584 // first few bytes. If an oop in the old code was there, that oop | |
1585 // should not get GC'd. Skip the first few bytes of oops on | |
1586 // not-entrant methods. | |
1587 address low_boundary = verified_entry_point(); | |
1588 if (is_not_entrant()) { | |
1589 low_boundary += NativeJump::instruction_size; | |
1590 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1591 // (See comment above.) | |
1592 } | |
1593 | |
1594 // The RedefineClasses() API can cause the class unloading invariant | |
1595 // to no longer be true. See jvmtiExport.hpp for details. | |
1596 // Also, leave a debugging breadcrumb in local flag. | |
1597 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1598 if (a_class_was_redefined) { | |
1599 // This set of the unloading_occurred flag is done before the | |
1600 // call to post_compiled_method_unload() so that the unloading | |
1601 // of this nmethod is reported. | |
1602 unloading_occurred = true; | |
1603 } | |
1604 | |
1605 // Follow methodOop | |
1606 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1607 return; | |
1608 } | |
1609 | |
1610 // Exception cache | |
1611 ExceptionCache* ec = exception_cache(); | |
1612 while (ec != NULL) { | |
1613 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1614 oop ex = *ex_addr; | |
1615 ExceptionCache* next_ec = ec->next(); | |
1616 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1617 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1618 remove_from_exception_cache(ec); | |
1619 } | |
1620 ec = next_ec; | |
1621 } | |
1622 | |
1623 // If class unloading occurred we first iterate over all inline caches and | |
1624 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1625 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1626 // iteration below. | |
1627 if (unloading_occurred) { | |
1628 RelocIterator iter(this, low_boundary); | |
1629 while(iter.next()) { | |
1630 if (iter.type() == relocInfo::virtual_call_type) { | |
1631 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1632 oop ic_oop = ic->cached_oop(); | |
1633 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1634 // The only exception is compiledICHolder oops which may | |
1635 // yet be marked below. (We check this further below). | |
1636 if (ic_oop->is_compiledICHolder()) { | |
1637 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1638 if (is_alive->do_object_b( | |
1639 cichk_oop->holder_method()->method_holder()) && | |
1640 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1641 continue; | |
1642 } | |
1643 } | |
1644 ic->set_to_clean(); | |
1489
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|
1645 assert(ic->cached_oop() == NULL, |
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jcoomes
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diff
changeset
|
1646 "cached oop in IC should be cleared"); |
0 | 1647 } |
1648 } | |
1649 } | |
1650 } | |
1651 | |
1652 // Compiled code | |
1653 RelocIterator iter(this, low_boundary); | |
1654 while (iter.next()) { | |
1655 if (iter.type() == relocInfo::oop_type) { | |
1656 oop_Relocation* r = iter.oop_reloc(); | |
1657 // In this loop, we must only traverse those oops directly embedded in | |
1658 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1659 assert(1 == (r->oop_is_immediate()) + | |
1660 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1661 "oop must be found in exactly one place"); | |
1662 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1663 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1664 return; | |
1665 } | |
1666 } | |
1667 } | |
1668 } | |
1669 | |
1670 | |
1671 // Scopes | |
1672 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1673 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1674 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1675 return; | |
1676 } | |
1677 } | |
1678 | |
1679 #ifndef PRODUCT | |
1680 // This nmethod was not unloaded; check below that all CompiledICs | |
1681 // refer to marked oops. | |
1682 { | |
1683 RelocIterator iter(this, low_boundary); | |
1684 while (iter.next()) { | |
1685 if (iter.type() == relocInfo::virtual_call_type) { | |
1686 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1687 oop ic_oop = ic->cached_oop(); | |
1688 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1689 "Found unmarked ic_oop in reachable nmethod"); | |
1690 } | |
1691 } | |
1692 } | |
1693 #endif // !PRODUCT | |
1694 } | |
1695 | |
941 | 1696 // This method is called twice during GC -- once while |
1697 // tracing the "active" nmethods on thread stacks during | |
1698 // the (strong) marking phase, and then again when walking | |
1699 // the code cache contents during the weak roots processing | |
1700 // phase. The two uses are distinguished by means of the | |
994
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1701 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1702 // case. We want to walk the weak roots in the nmethod |
1703 // only in the second case. The weak roots in the nmethod | |
1704 // are the oops in the ExceptionCache and the InlineCache | |
1705 // oops. | |
994
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1706 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1707 // make sure the oops ready to receive visitors |
1708 assert(!is_zombie() && !is_unloaded(), | |
1709 "should not call follow on zombie or unloaded nmethod"); | |
1710 | |
1711 // If the method is not entrant or zombie then a JMP is plastered over the | |
1712 // first few bytes. If an oop in the old code was there, that oop | |
1713 // should not get GC'd. Skip the first few bytes of oops on | |
1714 // not-entrant methods. | |
1715 address low_boundary = verified_entry_point(); | |
1716 if (is_not_entrant()) { | |
1717 low_boundary += NativeJump::instruction_size; | |
1718 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1719 // (See comment above.) | |
1720 } | |
1721 | |
1722 // Compiled code | |
1723 f->do_oop((oop*) &_method); | |
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1724 if (!do_strong_roots_only) { |
941 | 1725 // weak roots processing phase -- update ExceptionCache oops |
1726 ExceptionCache* ec = exception_cache(); | |
1727 while(ec != NULL) { | |
1728 f->do_oop((oop*)ec->exception_type_addr()); | |
1729 ec = ec->next(); | |
1730 } | |
1731 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1732 |
1733 RelocIterator iter(this, low_boundary); | |
941 | 1734 |
0 | 1735 while (iter.next()) { |
1736 if (iter.type() == relocInfo::oop_type ) { | |
1737 oop_Relocation* r = iter.oop_reloc(); | |
1738 // In this loop, we must only follow those oops directly embedded in | |
1739 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1740 assert(1 == (r->oop_is_immediate()) + |
1741 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1742 "oop must be found in exactly one place"); | |
0 | 1743 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1744 f->do_oop(r->oop_addr()); | |
1745 } | |
1746 } | |
1747 } | |
1748 | |
1749 // Scopes | |
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1750 // This includes oop constants not inlined in the code stream. |
0 | 1751 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1752 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1753 f->do_oop(p); | |
1754 } | |
1755 } | |
1756 | |
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1757 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1758 |
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1759 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1760 |
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1761 // An nmethod is "marked" if its _mark_link is set non-null. |
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1762 // Even if it is the end of the linked list, it will have a non-null link value, |
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1763 // as long as it is on the list. |
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1764 // This code must be MP safe, because it is used from parallel GC passes. |
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1765 bool nmethod::test_set_oops_do_mark() { |
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1766 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1767 nmethod* observed_mark_link = _oops_do_mark_link; |
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1768 if (observed_mark_link == NULL) { |
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1769 // Claim this nmethod for this thread to mark. |
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1770 observed_mark_link = (nmethod*) |
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1771 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1772 if (observed_mark_link == NULL) { |
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1773 |
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1774 // Atomically append this nmethod (now claimed) to the head of the list: |
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1775 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1776 for (;;) { |
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1777 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1778 _oops_do_mark_link = required_mark_nmethods; |
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1779 observed_mark_nmethods = (nmethod*) |
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1780 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1781 if (observed_mark_nmethods == required_mark_nmethods) |
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1782 break; |
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1783 } |
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1784 // Mark was clear when we first saw this guy. |
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1785 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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1786 return false; |
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1787 } |
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1788 } |
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1789 // On fall through, another racing thread marked this nmethod before we did. |
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1790 return true; |
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1791 } |
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1792 |
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1793 void nmethod::oops_do_marking_prologue() { |
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1794 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1795 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1796 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1797 // may fork a bunch of threads, and we need them all to see the same state. |
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1798 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1799 guarantee(observed == NULL, "no races in this sequential code"); |
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1800 } |
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1801 |
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1802 void nmethod::oops_do_marking_epilogue() { |
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1803 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1804 nmethod* cur = _oops_do_mark_nmethods; |
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1805 while (cur != NMETHOD_SENTINEL) { |
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1806 assert(cur != NULL, "not NULL-terminated"); |
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1807 nmethod* next = cur->_oops_do_mark_link; |
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1808 cur->_oops_do_mark_link = NULL; |
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1809 cur->fix_oop_relocations(); |
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1810 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
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1811 cur = next; |
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1812 } |
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1813 void* required = _oops_do_mark_nmethods; |
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1814 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1815 guarantee(observed == required, "no races in this sequential code"); |
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1816 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1817 } |
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1818 |
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1819 class DetectScavengeRoot: public OopClosure { |
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1820 bool _detected_scavenge_root; |
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1821 public: |
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1822 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1823 { NOT_PRODUCT(_print_nm = NULL); } |
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1824 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1825 virtual void do_oop(oop* p) { |
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1826 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1827 NOT_PRODUCT(maybe_print(p)); |
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1828 _detected_scavenge_root = true; |
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1829 } |
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1830 } |
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1831 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1832 |
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1833 #ifndef PRODUCT |
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1834 nmethod* _print_nm; |
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1835 void maybe_print(oop* p) { |
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1836 if (_print_nm == NULL) return; |
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1837 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1838 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1839 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1840 (intptr_t)(*p), (intptr_t)p); |
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1841 (*p)->print(); |
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1842 } |
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1843 #endif //PRODUCT |
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1844 }; |
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1845 |
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1846 bool nmethod::detect_scavenge_root_oops() { |
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1847 DetectScavengeRoot detect_scavenge_root; |
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1848 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1849 oops_do(&detect_scavenge_root); |
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1850 return detect_scavenge_root.detected_scavenge_root(); |
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1851 } |
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1852 |
0 | 1853 // Method that knows how to preserve outgoing arguments at call. This method must be |
1854 // called with a frame corresponding to a Java invoke | |
1855 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1856 #ifndef SHARK |
0 | 1857 if (!method()->is_native()) { |
1858 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1859 Bytecode_invoke call(ssd.method(), ssd.bci()); |
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1860 // compiled invokedynamic call sites have an implicit receiver at |
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1861 // resolution time, so make sure it gets GC'ed. |
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1862 bool has_receiver = !call.is_invokestatic(); |
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1863 Symbol* signature = call.signature(); |
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1864 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1865 } |
1692 | 1866 #endif // !SHARK |
0 | 1867 } |
1868 | |
1869 | |
1870 oop nmethod::embeddedOop_at(u_char* p) { | |
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1871 RelocIterator iter(this, p, p + 1); |
0 | 1872 while (iter.next()) |
1873 if (iter.type() == relocInfo::oop_type) { | |
1874 return iter.oop_reloc()->oop_value(); | |
1875 } | |
1876 return NULL; | |
1877 } | |
1878 | |
1879 | |
1880 inline bool includes(void* p, void* from, void* to) { | |
1881 return from <= p && p < to; | |
1882 } | |
1883 | |
1884 | |
1885 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1886 assert(count >= 2, "must be sentinel values, at least"); | |
1887 | |
1888 #ifdef ASSERT | |
1889 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1890 int prev_offset = pcs[0].pc_offset(); | |
1891 assert(prev_offset == PcDesc::lower_offset_limit, | |
1892 "must start with a sentinel"); | |
1893 for (int i = 1; i < count; i++) { | |
1894 int this_offset = pcs[i].pc_offset(); | |
1895 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1896 prev_offset = this_offset; | |
1897 } | |
1898 assert(prev_offset == PcDesc::upper_offset_limit, | |
1899 "must end with a sentinel"); | |
1900 #endif //ASSERT | |
1901 | |
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1902 // Search for MethodHandle invokes and tag the nmethod. |
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1903 for (int i = 0; i < count; i++) { |
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1904 if (pcs[i].is_method_handle_invoke()) { |
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1905 set_has_method_handle_invokes(true); |
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1906 break; |
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1907 } |
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1908 } |
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1909 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1910 |
0 | 1911 int size = count * sizeof(PcDesc); |
1912 assert(scopes_pcs_size() >= size, "oob"); | |
1913 memcpy(scopes_pcs_begin(), pcs, size); | |
1914 | |
1915 // Adjust the final sentinel downward. | |
1916 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1917 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1918 last_pc->set_pc_offset(content_size() + 1); |
0 | 1919 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1920 // Fill any rounding gaps with copies of the last record. | |
1921 last_pc[1] = last_pc[0]; | |
1922 } | |
1923 // The following assert could fail if sizeof(PcDesc) is not | |
1924 // an integral multiple of oopSize (the rounding term). | |
1925 // If it fails, change the logic to always allocate a multiple | |
1926 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1927 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1928 } | |
1929 | |
1930 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1931 assert(scopes_data_size() >= size, "oob"); | |
1932 memcpy(scopes_data_begin(), buffer, size); | |
1933 } | |
1934 | |
1935 | |
1936 #ifdef ASSERT | |
1937 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1938 PcDesc* lower = nm->scopes_pcs_begin(); | |
1939 PcDesc* upper = nm->scopes_pcs_end(); | |
1940 lower += 1; // exclude initial sentinel | |
1941 PcDesc* res = NULL; | |
1942 for (PcDesc* p = lower; p < upper; p++) { | |
1943 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1944 if (match_desc(p, pc_offset, approximate)) { | |
1945 if (res == NULL) | |
1946 res = p; | |
1947 else | |
1948 res = (PcDesc*) badAddress; | |
1949 } | |
1950 } | |
1951 return res; | |
1952 } | |
1953 #endif | |
1954 | |
1955 | |
1956 // Finds a PcDesc with real-pc equal to "pc" | |
1957 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1958 address base_address = code_begin(); |
0 | 1959 if ((pc < base_address) || |
1960 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1961 return NULL; // PC is wildly out of range | |
1962 } | |
1963 int pc_offset = (int) (pc - base_address); | |
1964 | |
1965 // Check the PcDesc cache if it contains the desired PcDesc | |
1966 // (This as an almost 100% hit rate.) | |
1967 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1968 if (res != NULL) { | |
1969 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1970 return res; | |
1971 } | |
1972 | |
1973 // Fallback algorithm: quasi-linear search for the PcDesc | |
1974 // Find the last pc_offset less than the given offset. | |
1975 // The successor must be the required match, if there is a match at all. | |
1976 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1977 PcDesc* lower = scopes_pcs_begin(); | |
1978 PcDesc* upper = scopes_pcs_end(); | |
1979 upper -= 1; // exclude final sentinel | |
1980 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1981 | |
1982 #define assert_LU_OK \ | |
1983 /* invariant on lower..upper during the following search: */ \ | |
1984 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1985 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1986 assert_LU_OK; | |
1987 | |
1988 // Use the last successful return as a split point. | |
1989 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1990 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1991 if (mid->pc_offset() < pc_offset) { | |
1992 lower = mid; | |
1993 } else { | |
1994 upper = mid; | |
1995 } | |
1996 | |
1997 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1998 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1999 const int RADIX = (1 << LOG2_RADIX); | |
2000 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2001 while ((mid = lower + step) < upper) { | |
2002 assert_LU_OK; | |
2003 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2004 if (mid->pc_offset() < pc_offset) { | |
2005 lower = mid; | |
2006 } else { | |
2007 upper = mid; | |
2008 break; | |
2009 } | |
2010 } | |
2011 assert_LU_OK; | |
2012 } | |
2013 | |
2014 // Sneak up on the value with a linear search of length ~16. | |
2015 while (true) { | |
2016 assert_LU_OK; | |
2017 mid = lower + 1; | |
2018 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2019 if (mid->pc_offset() < pc_offset) { | |
2020 lower = mid; | |
2021 } else { | |
2022 upper = mid; | |
2023 break; | |
2024 } | |
2025 } | |
2026 #undef assert_LU_OK | |
2027 | |
2028 if (match_desc(upper, pc_offset, approximate)) { | |
2029 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2030 _pc_desc_cache.add_pc_desc(upper); | |
2031 return upper; | |
2032 } else { | |
2033 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2034 return NULL; | |
2035 } | |
2036 } | |
2037 | |
2038 | |
2039 bool nmethod::check_all_dependencies() { | |
2040 bool found_check = false; | |
2041 // wholesale check of all dependencies | |
2042 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2043 if (deps.check_dependency() != NULL) { | |
2044 found_check = true; | |
2045 NOT_DEBUG(break); | |
2046 } | |
2047 } | |
2048 return found_check; // tell caller if we found anything | |
2049 } | |
2050 | |
2051 bool nmethod::check_dependency_on(DepChange& changes) { | |
2052 // What has happened: | |
2053 // 1) a new class dependee has been added | |
2054 // 2) dependee and all its super classes have been marked | |
2055 bool found_check = false; // set true if we are upset | |
2056 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2057 // Evaluate only relevant dependencies. | |
2058 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2059 found_check = true; | |
2060 NOT_DEBUG(break); | |
2061 } | |
2062 } | |
2063 return found_check; | |
2064 } | |
2065 | |
2066 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2067 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2068 objArrayOop dependee_methods = dependee_ik->methods(); | |
2069 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2070 if (deps.type() == Dependencies::evol_method) { | |
2071 methodOop method = deps.method_argument(0); | |
2072 for (int j = 0; j < dependee_methods->length(); j++) { | |
2073 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2074 // RC_TRACE macro has an embedded ResourceMark | |
2075 RC_TRACE(0x01000000, | |
2076 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2077 _method->method_holder()->klass_part()->external_name(), | |
2078 _method->name()->as_C_string(), | |
2079 _method->signature()->as_C_string(), compile_id(), | |
2080 method->method_holder()->klass_part()->external_name(), | |
2081 method->name()->as_C_string(), | |
2082 method->signature()->as_C_string())); | |
2083 if (TraceDependencies || LogCompilation) | |
2084 deps.log_dependency(dependee); | |
2085 return true; | |
2086 } | |
2087 } | |
2088 } | |
2089 } | |
2090 return false; | |
2091 } | |
2092 | |
2093 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2094 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2095 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2096 if (deps.type() != Dependencies::evol_method) | |
2097 continue; | |
2098 methodOop method = deps.method_argument(0); | |
2099 if (method == dependee) return true; | |
2100 } | |
2101 return false; | |
2102 } | |
2103 | |
2104 | |
2105 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2106 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2107 if (is_zombie()) { |
2108 // a zombie may never be patched | |
2109 return false; | |
2110 } | |
2111 return true; | |
2112 } | |
2113 | |
2114 | |
2115 address nmethod::continuation_for_implicit_exception(address pc) { | |
2116 // Exception happened outside inline-cache check code => we are inside | |
2117 // an active nmethod => use cpc to determine a return address | |
1748 | 2118 int exception_offset = pc - code_begin(); |
0 | 2119 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2120 #ifdef ASSERT | |
2121 if (cont_offset == 0) { | |
2122 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2123 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2124 HandleMark hm(thread); | |
2125 ResourceMark rm(thread); | |
2126 CodeBlob* cb = CodeCache::find_blob(pc); | |
2127 assert(cb != NULL && cb == this, ""); | |
2128 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2129 print(); | |
2130 method()->print_codes(); | |
2131 print_code(); | |
2132 print_pcs(); | |
2133 } | |
2134 #endif | |
1250 | 2135 if (cont_offset == 0) { |
2136 // Let the normal error handling report the exception | |
2137 return NULL; | |
2138 } | |
1748 | 2139 return code_begin() + cont_offset; |
0 | 2140 } |
2141 | |
2142 | |
2143 | |
2144 void nmethod_init() { | |
2145 // make sure you didn't forget to adjust the filler fields | |
2146 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2147 } | |
2148 | |
2149 | |
2150 //------------------------------------------------------------------------------------------- | |
2151 | |
2152 | |
2153 // QQQ might we make this work from a frame?? | |
2154 nmethodLocker::nmethodLocker(address pc) { | |
2155 CodeBlob* cb = CodeCache::find_blob(pc); | |
2156 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2157 _nm = (nmethod*)cb; | |
2158 lock_nmethod(_nm); | |
2159 } | |
2160 | |
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2161 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2162 // should pass zombie_ok == true. |
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2163 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2164 if (nm == NULL) return; |
2165 Atomic::inc(&nm->_lock_count); | |
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2166 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2167 } |
2168 | |
2169 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2170 if (nm == NULL) return; | |
2171 Atomic::dec(&nm->_lock_count); | |
2172 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2173 } | |
2174 | |
1204 | 2175 |
2176 // ----------------------------------------------------------------------------- | |
2177 // nmethod::get_deopt_original_pc | |
2178 // | |
2179 // Return the original PC for the given PC if: | |
2180 // (a) the given PC belongs to a nmethod and | |
2181 // (b) it is a deopt PC | |
2182 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2183 if (fr->cb() == NULL) return NULL; | |
2184 | |
2185 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2186 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2187 return nm->get_original_pc(fr); | |
2188 | |
2189 return NULL; | |
0 | 2190 } |
2191 | |
2192 | |
2193 // ----------------------------------------------------------------------------- | |
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2194 // MethodHandle |
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2195 |
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2196 bool nmethod::is_method_handle_return(address return_pc) { |
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2197 if (!has_method_handle_invokes()) return false; |
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2198 PcDesc* pd = pc_desc_at(return_pc); |
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2199 if (pd == NULL) |
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2200 return false; |
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2201 return pd->is_method_handle_invoke(); |
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2202 } |
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2203 |
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2204 |
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2205 // ----------------------------------------------------------------------------- |
0 | 2206 // Verification |
2207 | |
989
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2208 class VerifyOopsClosure: public OopClosure { |
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2209 nmethod* _nm; |
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2210 bool _ok; |
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2211 public: |
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2212 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2213 bool ok() { return _ok; } |
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2214 virtual void do_oop(oop* p) { |
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2215 if ((*p) == NULL || (*p)->is_oop()) return; |
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2216 if (_ok) { |
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2217 _nm->print_nmethod(true); |
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2218 _ok = false; |
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2219 } |
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2220 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2221 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2222 } |
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2223 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2224 }; |
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2225 |
0 | 2226 void nmethod::verify() { |
2227 | |
2228 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2229 // seems odd. | |
2230 | |
2231 if( is_zombie() || is_not_entrant() ) | |
2232 return; | |
2233 | |
2234 // Make sure all the entry points are correctly aligned for patching. | |
2235 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2236 | |
2237 assert(method()->is_oop(), "must be valid"); | |
2238 | |
2239 ResourceMark rm; | |
2240 | |
2241 if (!CodeCache::contains(this)) { | |
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2242 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2243 } |
2244 | |
2245 if(is_native_method() ) | |
2246 return; | |
2247 | |
2248 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2249 if (nm != this) { | |
1490
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2250 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2251 this)); |
0 | 2252 } |
2253 | |
2254 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2255 if (! p->verify(this)) { | |
2256 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2257 } | |
2258 } | |
2259 | |
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2260 VerifyOopsClosure voc(this); |
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2261 oops_do(&voc); |
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2262 assert(voc.ok(), "embedded oops must be OK"); |
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2263 verify_scavenge_root_oops(); |
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2264 |
0 | 2265 verify_scopes(); |
2266 } | |
2267 | |
2268 | |
2269 void nmethod::verify_interrupt_point(address call_site) { | |
2270 // This code does not work in release mode since | |
2271 // owns_lock only is available in debug mode. | |
2272 CompiledIC* ic = NULL; | |
2273 Thread *cur = Thread::current(); | |
2274 if (CompiledIC_lock->owner() == cur || | |
2275 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2276 SafepointSynchronize::is_at_safepoint())) { | |
2277 ic = CompiledIC_at(call_site); | |
2278 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2279 } else { | |
2280 MutexLocker ml_verify (CompiledIC_lock); | |
2281 ic = CompiledIC_at(call_site); | |
2282 } | |
2283 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2284 assert(pd != NULL, "PcDesc must exist"); | |
2285 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
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2286 pd->obj_decode_offset(), pd->should_reexecute(), |
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2287 pd->return_oop()); |
0 | 2288 !sd->is_top(); sd = sd->sender()) { |
2289 sd->verify(); | |
2290 } | |
2291 } | |
2292 | |
2293 void nmethod::verify_scopes() { | |
2294 if( !method() ) return; // Runtime stubs have no scope | |
2295 if (method()->is_native()) return; // Ignore stub methods. | |
2296 // iterate through all interrupt point | |
2297 // and verify the debug information is valid. | |
2298 RelocIterator iter((nmethod*)this); | |
2299 while (iter.next()) { | |
2300 address stub = NULL; | |
2301 switch (iter.type()) { | |
2302 case relocInfo::virtual_call_type: | |
2303 verify_interrupt_point(iter.addr()); | |
2304 break; | |
2305 case relocInfo::opt_virtual_call_type: | |
2306 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2307 verify_interrupt_point(iter.addr()); | |
2308 break; | |
2309 case relocInfo::static_call_type: | |
2310 stub = iter.static_call_reloc()->static_stub(); | |
2311 //verify_interrupt_point(iter.addr()); | |
2312 break; | |
2313 case relocInfo::runtime_call_type: | |
2314 address destination = iter.reloc()->value(); | |
2315 // Right now there is no way to find out which entries support | |
2316 // an interrupt point. It would be nice if we had this | |
2317 // information in a table. | |
2318 break; | |
2319 } | |
2320 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2321 } | |
2322 } | |
2323 | |
2324 | |
2325 // ----------------------------------------------------------------------------- | |
2326 // Non-product code | |
2327 #ifndef PRODUCT | |
2328 | |
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2329 class DebugScavengeRoot: public OopClosure { |
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2330 nmethod* _nm; |
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2331 bool _ok; |
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2332 public: |
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2333 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2334 bool ok() { return _ok; } |
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2335 virtual void do_oop(oop* p) { |
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2336 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2337 if (_ok) { |
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2338 _nm->print_nmethod(true); |
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2339 _ok = false; |
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2340 } |
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2341 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2342 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2343 (*p)->print(); |
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2344 } |
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2345 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2346 }; |
0 | 2347 |
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2348 void nmethod::verify_scavenge_root_oops() { |
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2349 if (!on_scavenge_root_list()) { |
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2350 // Actually look inside, to verify the claim that it's clean. |
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2351 DebugScavengeRoot debug_scavenge_root(this); |
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2352 oops_do(&debug_scavenge_root); |
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2353 if (!debug_scavenge_root.ok()) |
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2354 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2355 } |
989
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2356 assert(scavenge_root_not_marked(), ""); |
0 | 2357 } |
2358 | |
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2359 #endif // PRODUCT |
0 | 2360 |
2361 // Printing operations | |
2362 | |
2363 void nmethod::print() const { | |
2364 ResourceMark rm; | |
2365 ttyLocker ttyl; // keep the following output all in one block | |
2366 | |
2405
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2367 tty->print("Compiled method "); |
0 | 2368 |
2369 if (is_compiled_by_c1()) { | |
2370 tty->print("(c1) "); | |
2371 } else if (is_compiled_by_c2()) { | |
2372 tty->print("(c2) "); | |
1692 | 2373 } else if (is_compiled_by_shark()) { |
2374 tty->print("(shark) "); | |
0 | 2375 } else { |
2376 tty->print("(nm) "); | |
2377 } | |
2378 | |
2405
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2379 print_on(tty, NULL); |
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2380 |
0 | 2381 if (WizardMode) { |
2382 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2383 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2384 tty->print(" { "); | |
2385 if (is_in_use()) tty->print("in_use "); | |
2386 if (is_not_entrant()) tty->print("not_entrant "); | |
2387 if (is_zombie()) tty->print("zombie "); | |
2388 if (is_unloaded()) tty->print("unloaded "); | |
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2389 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2390 tty->print_cr("}:"); |
2391 } | |
2392 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2393 (address)this, | |
2394 (address)this + size(), | |
2395 size()); | |
2396 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2397 relocation_begin(), | |
2398 relocation_end(), | |
2399 relocation_size()); | |
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2400 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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2401 consts_begin(), |
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2402 consts_end(), |
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2403 consts_size()); |
1748 | 2404 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2405 insts_begin(), | |
2406 insts_end(), | |
2407 insts_size()); | |
0 | 2408 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2409 stub_begin(), | |
2410 stub_end(), | |
2411 stub_size()); | |
1563
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2412 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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2413 oops_begin(), |
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2414 oops_end(), |
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2415 oops_size()); |
0 | 2416 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2417 scopes_data_begin(), | |
2418 scopes_data_end(), | |
2419 scopes_data_size()); | |
2420 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2421 scopes_pcs_begin(), | |
2422 scopes_pcs_end(), | |
2423 scopes_pcs_size()); | |
2424 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2425 dependencies_begin(), | |
2426 dependencies_end(), | |
2427 dependencies_size()); | |
2428 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2429 handler_table_begin(), | |
2430 handler_table_end(), | |
2431 handler_table_size()); | |
2432 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2433 nul_chk_table_begin(), | |
2434 nul_chk_table_end(), | |
2435 nul_chk_table_size()); | |
2436 } | |
2437 | |
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2438 void nmethod::print_code() { |
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2439 HandleMark hm; |
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2440 ResourceMark m; |
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2441 Disassembler::decode(this); |
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2442 } |
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2443 |
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2444 |
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2445 #ifndef PRODUCT |
0 | 2446 |
2447 void nmethod::print_scopes() { | |
2448 // Find the first pc desc for all scopes in the code and print it. | |
2449 ResourceMark rm; | |
2450 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2451 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2452 continue; | |
2453 | |
2454 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2455 sd->print_on(tty, p); | |
2456 } | |
2457 } | |
2458 | |
2459 void nmethod::print_dependencies() { | |
2460 ResourceMark rm; | |
2461 ttyLocker ttyl; // keep the following output all in one block | |
2462 tty->print_cr("Dependencies:"); | |
2463 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2464 deps.print_dependency(); | |
2465 klassOop ctxk = deps.context_type(); | |
2466 if (ctxk != NULL) { | |
2467 Klass* k = Klass::cast(ctxk); | |
2468 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2469 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2470 } |
2471 } | |
2472 deps.log_dependency(); // put it into the xml log also | |
2473 } | |
2474 } | |
2475 | |
2476 | |
2477 void nmethod::print_relocations() { | |
2478 ResourceMark m; // in case methods get printed via the debugger | |
2479 tty->print_cr("relocations:"); | |
2480 RelocIterator iter(this); | |
2481 iter.print(); | |
2482 if (UseRelocIndex) { | |
2483 jint* index_end = (jint*)relocation_end() - 1; | |
2484 jint index_size = *index_end; | |
2485 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2486 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2487 if (index_size > 0) { | |
2488 jint* ip; | |
2489 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2490 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2491 ip[0], | |
2492 ip[1], | |
2493 header_end()+ip[0], | |
2494 relocation_begin()-1+ip[1]); | |
2495 for (; ip < index_end; ip++) | |
2496 tty->print_cr(" (%d ?)", ip[0]); | |
2497 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2498 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2499 } | |
2500 } | |
2501 } | |
2502 | |
2503 | |
2504 void nmethod::print_pcs() { | |
2505 ResourceMark m; // in case methods get printed via debugger | |
2506 tty->print_cr("pc-bytecode offsets:"); | |
2507 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2508 p->print(this); | |
2509 } | |
2510 } | |
2511 | |
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2512 #endif // PRODUCT |
0 | 2513 |
2514 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2515 RelocIterator iter(this, begin, end); | |
2516 bool have_one = false; | |
2517 while (iter.next()) { | |
2518 have_one = true; | |
2519 switch (iter.type()) { | |
2520 case relocInfo::none: return "no_reloc"; | |
2521 case relocInfo::oop_type: { | |
2522 stringStream st; | |
2523 oop_Relocation* r = iter.oop_reloc(); | |
2524 oop obj = r->oop_value(); | |
2525 st.print("oop("); | |
2526 if (obj == NULL) st.print("NULL"); | |
2527 else obj->print_value_on(&st); | |
2528 st.print(")"); | |
2529 return st.as_string(); | |
2530 } | |
2531 case relocInfo::virtual_call_type: return "virtual_call"; | |
2532 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2533 case relocInfo::static_call_type: return "static_call"; | |
2534 case relocInfo::static_stub_type: return "static_stub"; | |
2535 case relocInfo::runtime_call_type: return "runtime_call"; | |
2536 case relocInfo::external_word_type: return "external_word"; | |
2537 case relocInfo::internal_word_type: return "internal_word"; | |
2538 case relocInfo::section_word_type: return "section_word"; | |
2539 case relocInfo::poll_type: return "poll"; | |
2540 case relocInfo::poll_return_type: return "poll_return"; | |
2541 case relocInfo::type_mask: return "type_bit_mask"; | |
2542 } | |
2543 } | |
2544 return have_one ? "other" : NULL; | |
2545 } | |
2546 | |
2547 // Return a the last scope in (begin..end] | |
2548 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2549 PcDesc* p = pc_desc_near(begin+1); | |
2550 if (p != NULL && p->real_pc(this) <= end) { | |
2551 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
|
2552 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
|
2553 p->return_oop()); |
0 | 2554 } |
2555 return NULL; | |
2556 } | |
2557 | |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2558 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2559 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2560 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2561 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2562 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2563 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2564 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2565 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2566 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2567 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2568 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2569 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2570 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2571 methodHandle m = method(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2572 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2573 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2574 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2575 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2576 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2577 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2578 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2579 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2580 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2581 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2582 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2583 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2584 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2585 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2586 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2587 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2588 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2589 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2590 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2591 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2592 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2593 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2594 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2595 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2596 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2597 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2598 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2599 int stack_slot_offset = this->frame_size() * wordSize; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2600 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2601 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2602 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2603 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2604 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2605 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2606 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2607 BasicType t = (at_this ? T_OBJECT : ss.type()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2608 assert(t == sig_bt[sig_index], "sigs in sync"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2609 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2610 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2611 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2612 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2613 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2614 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2615 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2616 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2617 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2618 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2619 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2620 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2621 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2622 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2623 if (offset == stack_slot_offset) at_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2624 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2625 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2626 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2627 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2628 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2629 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2630 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2631 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2632 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2633 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2634 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2635 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2636 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2637 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2638 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2639 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2640 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2641 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2642 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2643 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2644 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2645 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2646 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2647 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2648 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2649 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2650 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2651 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2652 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2653 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2654 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2655 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2656 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2657 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2658 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2659 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2660 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2661 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2662 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2663 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2664 |
0 | 2665 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2666 // First, find an oopmap in (begin, end]. | |
2667 // We use the odd half-closed interval so that oop maps and scope descs | |
2668 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2669 address base = code_begin(); |
0 | 2670 OopMapSet* oms = oop_maps(); |
2671 if (oms != NULL) { | |
2672 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2673 OopMap* om = oms->at(i); | |
2674 address pc = base + om->offset(); | |
2675 if (pc > begin) { | |
2676 if (pc <= end) { | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2677 st->move_to(column); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2678 st->print("; "); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2679 om->print_on(st); |
0 | 2680 } |
2681 break; | |
2682 } | |
2683 } | |
2684 } | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2685 |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2686 // Print any debug info present at this pc. |
0 | 2687 ScopeDesc* sd = scope_desc_in(begin, end); |
2688 if (sd != NULL) { | |
100
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2689 st->move_to(column); |
0 | 2690 if (sd->bci() == SynchronizationEntryBCI) { |
2691 st->print(";*synchronization entry"); | |
2692 } else { | |
2693 if (sd->method().is_null()) { | |
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2694 st->print("method is NULL"); |
0 | 2695 } else if (sd->method()->is_native()) { |
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2696 st->print("method is native"); |
0 | 2697 } else { |
2142 | 2698 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2699 st->print(";*%s", Bytecodes::name(bc)); |
2700 switch (bc) { | |
2701 case Bytecodes::_invokevirtual: | |
2702 case Bytecodes::_invokespecial: | |
2703 case Bytecodes::_invokestatic: | |
2704 case Bytecodes::_invokeinterface: | |
2705 { | |
2142 | 2706 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2707 st->print(" "); |
2142 | 2708 if (invoke.name() != NULL) |
2709 invoke.name()->print_symbol_on(st); | |
0 | 2710 else |
2711 st->print("<UNKNOWN>"); | |
2712 break; | |
2713 } | |
2714 case Bytecodes::_getfield: | |
2715 case Bytecodes::_putfield: | |
2716 case Bytecodes::_getstatic: | |
2717 case Bytecodes::_putstatic: | |
2718 { | |
2142 | 2719 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2720 st->print(" "); |
2142 | 2721 if (field.name() != NULL) |
2722 field.name()->print_symbol_on(st); | |
0 | 2723 else |
2724 st->print("<UNKNOWN>"); | |
2725 } | |
2726 } | |
2727 } | |
2728 } | |
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2729 |
0 | 2730 // Print all scopes |
2731 for (;sd != NULL; sd = sd->sender()) { | |
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2732 st->move_to(column); |
0 | 2733 st->print("; -"); |
2734 if (sd->method().is_null()) { | |
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2735 st->print("method is NULL"); |
0 | 2736 } else { |
2737 sd->method()->print_short_name(st); | |
2738 } | |
2739 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2740 if (lineno != -1) { | |
2741 st->print("@%d (line %d)", sd->bci(), lineno); | |
2742 } else { | |
2743 st->print("@%d", sd->bci()); | |
2744 } | |
2745 st->cr(); | |
2746 } | |
2747 } | |
2748 | |
2749 // Print relocation information | |
2750 const char* str = reloc_string_for(begin, end); | |
2751 if (str != NULL) { | |
2752 if (sd != NULL) st->cr(); | |
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2753 st->move_to(column); |
0 | 2754 st->print("; {%s}", str); |
2755 } | |
1748 | 2756 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2757 if (cont_offset != 0) { |
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2758 st->move_to(column); |
1748 | 2759 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2760 } |
2761 | |
2762 } | |
2763 | |
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2764 #ifndef PRODUCT |
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2765 |
0 | 2766 void nmethod::print_value_on(outputStream* st) const { |
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2767 st->print("nmethod"); |
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2768 print_on(st, NULL); |
0 | 2769 } |
2770 | |
2771 void nmethod::print_calls(outputStream* st) { | |
2772 RelocIterator iter(this); | |
2773 while (iter.next()) { | |
2774 switch (iter.type()) { | |
2775 case relocInfo::virtual_call_type: | |
2776 case relocInfo::opt_virtual_call_type: { | |
2777 VerifyMutexLocker mc(CompiledIC_lock); | |
2778 CompiledIC_at(iter.reloc())->print(); | |
2779 break; | |
2780 } | |
2781 case relocInfo::static_call_type: | |
2782 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2783 compiledStaticCall_at(iter.reloc())->print(); | |
2784 break; | |
2785 } | |
2786 } | |
2787 } | |
2788 | |
2789 void nmethod::print_handler_table() { | |
2790 ExceptionHandlerTable(this).print(); | |
2791 } | |
2792 | |
2793 void nmethod::print_nul_chk_table() { | |
1748 | 2794 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2795 } |
2796 | |
2797 void nmethod::print_statistics() { | |
2798 ttyLocker ttyl; | |
2799 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2800 nmethod_stats.print_native_nmethod_stats(); | |
2801 nmethod_stats.print_nmethod_stats(); | |
2802 DebugInformationRecorder::print_statistics(); | |
2803 nmethod_stats.print_pc_stats(); | |
2804 Dependencies::print_statistics(); | |
2805 if (xtty != NULL) xtty->tail("statistics"); | |
2806 } | |
2807 | |
2808 #endif // PRODUCT |