Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 6800:9191895df19d
7200001: failed C1 OSR compile doesn't get recompiled with C2
Reviewed-by: kvn
author | twisti |
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date | Mon, 24 Sep 2012 17:59:24 -0700 |
parents | b31471cdc53e |
children | f2e12eb74117 |
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" | |
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37 #include "oops/methodData.hpp" |
1972 | 38 #include "prims/jvmtiRedefineClassesTrace.hpp" |
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39 #include "prims/jvmtiImpl.hpp" |
1972 | 40 #include "runtime/sharedRuntime.hpp" |
41 #include "runtime/sweeper.hpp" | |
42 #include "utilities/dtrace.hpp" | |
43 #include "utilities/events.hpp" | |
44 #include "utilities/xmlstream.hpp" | |
45 #ifdef SHARK | |
46 #include "shark/sharkCompiler.hpp" | |
47 #endif | |
0 | 48 |
49 #ifdef DTRACE_ENABLED | |
50 | |
51 // Only bother with this argument setup if dtrace is available | |
52 | |
4006 | 53 #ifndef USDT2 |
0 | 54 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, |
55 const char*, int, const char*, int, const char*, int, void*, size_t); | |
56 | |
57 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
58 char*, int, char*, int, char*, int); | |
59 | |
60 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
61 { \ | |
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62 Method* m = (method); \ |
0 | 63 if (m != NULL) { \ |
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64 Symbol* klass_name = m->klass_name(); \ |
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65 Symbol* name = m->name(); \ |
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66 Symbol* signature = m->signature(); \ |
0 | 67 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
68 klass_name->bytes(), klass_name->utf8_length(), \ | |
69 name->bytes(), name->utf8_length(), \ | |
70 signature->bytes(), signature->utf8_length()); \ | |
71 } \ | |
72 } | |
4006 | 73 #else /* USDT2 */ |
74 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
75 { \ | |
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76 Method* m = (method); \ |
4006 | 77 if (m != NULL) { \ |
78 Symbol* klass_name = m->klass_name(); \ | |
79 Symbol* name = m->name(); \ | |
80 Symbol* signature = m->signature(); \ | |
81 HOTSPOT_COMPILED_METHOD_UNLOAD( \ | |
82 (char *) klass_name->bytes(), klass_name->utf8_length(), \ | |
83 (char *) name->bytes(), name->utf8_length(), \ | |
84 (char *) signature->bytes(), signature->utf8_length()); \ | |
85 } \ | |
86 } | |
87 #endif /* USDT2 */ | |
0 | 88 |
89 #else // ndef DTRACE_ENABLED | |
90 | |
91 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
92 | |
93 #endif | |
94 | |
95 bool nmethod::is_compiled_by_c1() const { | |
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96 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 97 if (is_native_method()) return false; |
98 return compiler()->is_c1(); | |
99 } | |
100 bool nmethod::is_compiled_by_c2() const { | |
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101 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 102 if (is_native_method()) return false; |
103 return compiler()->is_c2(); | |
104 } | |
1692 | 105 bool nmethod::is_compiled_by_shark() const { |
106 if (is_native_method()) return false; | |
107 assert(compiler() != NULL, "must be"); | |
108 return compiler()->is_shark(); | |
109 } | |
0 | 110 |
111 | |
112 | |
113 //--------------------------------------------------------------------------------- | |
114 // NMethod statistics | |
115 // They are printed under various flags, including: | |
116 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
117 // (In the latter two cases, they like other stats are printed to the log only.) | |
118 | |
119 #ifndef PRODUCT | |
120 // These variables are put into one block to reduce relocations | |
121 // and make it simpler to print from the debugger. | |
122 static | |
123 struct nmethod_stats_struct { | |
124 int nmethod_count; | |
125 int total_size; | |
126 int relocation_size; | |
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127 int consts_size; |
1748 | 128 int insts_size; |
0 | 129 int stub_size; |
130 int scopes_data_size; | |
131 int scopes_pcs_size; | |
132 int dependencies_size; | |
133 int handler_table_size; | |
134 int nul_chk_table_size; | |
135 int oops_size; | |
136 | |
137 void note_nmethod(nmethod* nm) { | |
138 nmethod_count += 1; | |
139 total_size += nm->size(); | |
140 relocation_size += nm->relocation_size(); | |
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141 consts_size += nm->consts_size(); |
1748 | 142 insts_size += nm->insts_size(); |
0 | 143 stub_size += nm->stub_size(); |
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144 oops_size += nm->oops_size(); |
0 | 145 scopes_data_size += nm->scopes_data_size(); |
146 scopes_pcs_size += nm->scopes_pcs_size(); | |
147 dependencies_size += nm->dependencies_size(); | |
148 handler_table_size += nm->handler_table_size(); | |
149 nul_chk_table_size += nm->nul_chk_table_size(); | |
150 } | |
151 void print_nmethod_stats() { | |
152 if (nmethod_count == 0) return; | |
153 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
154 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
155 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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156 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 157 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 158 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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159 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 160 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
161 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
162 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
163 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
164 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
165 } | |
166 | |
167 int native_nmethod_count; | |
168 int native_total_size; | |
169 int native_relocation_size; | |
1748 | 170 int native_insts_size; |
0 | 171 int native_oops_size; |
172 void note_native_nmethod(nmethod* nm) { | |
173 native_nmethod_count += 1; | |
174 native_total_size += nm->size(); | |
175 native_relocation_size += nm->relocation_size(); | |
1748 | 176 native_insts_size += nm->insts_size(); |
0 | 177 native_oops_size += nm->oops_size(); |
178 } | |
179 void print_native_nmethod_stats() { | |
180 if (native_nmethod_count == 0) return; | |
181 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
182 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
183 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 184 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 185 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
186 } | |
187 | |
188 int pc_desc_resets; // number of resets (= number of caches) | |
189 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
190 int pc_desc_approx; // number of those which have approximate true | |
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191 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 192 int pc_desc_hits; // number of LRU cache hits |
193 int pc_desc_tests; // total number of PcDesc examinations | |
194 int pc_desc_searches; // total number of quasi-binary search steps | |
195 int pc_desc_adds; // number of LUR cache insertions | |
196 | |
197 void print_pc_stats() { | |
198 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
199 pc_desc_queries, | |
200 (double)(pc_desc_tests + pc_desc_searches) | |
201 / pc_desc_queries); | |
202 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
203 pc_desc_resets, | |
204 pc_desc_queries, pc_desc_approx, | |
205 pc_desc_repeats, pc_desc_hits, | |
206 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
207 } | |
208 } nmethod_stats; | |
209 #endif //PRODUCT | |
210 | |
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211 |
0 | 212 //--------------------------------------------------------------------------------- |
213 | |
214 | |
215 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
216 assert(pc != NULL, "Must be non null"); | |
217 assert(exception.not_null(), "Must be non null"); | |
218 assert(handler != NULL, "Must be non null"); | |
219 | |
220 _count = 0; | |
221 _exception_type = exception->klass(); | |
222 _next = NULL; | |
223 | |
224 add_address_and_handler(pc,handler); | |
225 } | |
226 | |
227 | |
228 address ExceptionCache::match(Handle exception, address pc) { | |
229 assert(pc != NULL,"Must be non null"); | |
230 assert(exception.not_null(),"Must be non null"); | |
231 if (exception->klass() == exception_type()) { | |
232 return (test_address(pc)); | |
233 } | |
234 | |
235 return NULL; | |
236 } | |
237 | |
238 | |
239 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
240 assert(exception.not_null(),"Must be non null"); | |
241 if (exception->klass() == exception_type() && count() < cache_size) { | |
242 return true; | |
243 } | |
244 return false; | |
245 } | |
246 | |
247 | |
248 address ExceptionCache::test_address(address addr) { | |
249 for (int i=0; i<count(); i++) { | |
250 if (pc_at(i) == addr) { | |
251 return handler_at(i); | |
252 } | |
253 } | |
254 return NULL; | |
255 } | |
256 | |
257 | |
258 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
259 if (test_address(addr) == handler) return true; | |
260 if (count() < cache_size) { | |
261 set_pc_at(count(),addr); | |
262 set_handler_at(count(), handler); | |
263 increment_count(); | |
264 return true; | |
265 } | |
266 return false; | |
267 } | |
268 | |
269 | |
270 // private method for handling exception cache | |
271 // These methods are private, and used to manipulate the exception cache | |
272 // directly. | |
273 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
274 ExceptionCache* ec = exception_cache(); | |
275 while (ec != NULL) { | |
276 if (ec->match_exception_with_space(exception)) { | |
277 return ec; | |
278 } | |
279 ec = ec->next(); | |
280 } | |
281 return NULL; | |
282 } | |
283 | |
284 | |
285 //----------------------------------------------------------------------------- | |
286 | |
287 | |
288 // Helper used by both find_pc_desc methods. | |
289 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
290 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
291 if (!approximate) | |
292 return pc->pc_offset() == pc_offset; | |
293 else | |
294 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
295 } | |
296 | |
297 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
298 if (initial_pc_desc == NULL) { | |
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299 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 300 return; |
301 } | |
302 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
303 // reset the cache by filling it with benign (non-null) values | |
304 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
305 for (int i = 0; i < cache_size; i++) | |
306 _pc_descs[i] = initial_pc_desc; | |
307 } | |
308 | |
309 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
310 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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311 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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312 |
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313 // Note: one might think that caching the most recently |
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314 // read value separately would be a win, but one would be |
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315 // wrong. When many threads are updating it, the cache |
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316 // line it's in would bounce between caches, negating |
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317 // any benefit. |
0 | 318 |
319 // In order to prevent race conditions do not load cache elements | |
320 // repeatedly, but use a local copy: | |
321 PcDesc* res; | |
322 | |
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323 // Step one: Check the most recently added value. |
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324 res = _pc_descs[0]; |
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325 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 326 if (match_desc(res, pc_offset, approximate)) { |
327 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
328 return res; | |
329 } | |
330 | |
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331 // Step two: Check the rest of the LRU cache. |
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332 for (int i = 1; i < cache_size; ++i) { |
0 | 333 res = _pc_descs[i]; |
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334 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 335 if (match_desc(res, pc_offset, approximate)) { |
336 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
337 return res; | |
338 } | |
339 } | |
340 | |
341 // Report failure. | |
342 return NULL; | |
343 } | |
344 | |
345 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
346 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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347 // Update the LRU cache by shifting pc_desc forward. |
0 | 348 for (int i = 0; i < cache_size; i++) { |
349 PcDesc* next = _pc_descs[i]; | |
350 _pc_descs[i] = pc_desc; | |
351 pc_desc = next; | |
352 } | |
353 } | |
354 | |
355 // adjust pcs_size so that it is a multiple of both oopSize and | |
356 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
357 // of oopSize, then 2*sizeof(PcDesc) is) | |
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358 static int adjust_pcs_size(int pcs_size) { |
0 | 359 int nsize = round_to(pcs_size, oopSize); |
360 if ((nsize % sizeof(PcDesc)) != 0) { | |
361 nsize = pcs_size + sizeof(PcDesc); | |
362 } | |
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363 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 364 return nsize; |
365 } | |
366 | |
367 //----------------------------------------------------------------------------- | |
368 | |
369 | |
370 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
371 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
372 assert(new_entry != NULL,"Must be non null"); | |
373 assert(new_entry->next() == NULL, "Must be null"); | |
374 | |
375 if (exception_cache() != NULL) { | |
376 new_entry->set_next(exception_cache()); | |
377 } | |
378 set_exception_cache(new_entry); | |
379 } | |
380 | |
381 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
382 ExceptionCache* prev = NULL; | |
383 ExceptionCache* curr = exception_cache(); | |
384 assert(curr != NULL, "nothing to remove"); | |
385 // find the previous and next entry of ec | |
386 while (curr != ec) { | |
387 prev = curr; | |
388 curr = curr->next(); | |
389 assert(curr != NULL, "ExceptionCache not found"); | |
390 } | |
391 // now: curr == ec | |
392 ExceptionCache* next = curr->next(); | |
393 if (prev == NULL) { | |
394 set_exception_cache(next); | |
395 } else { | |
396 prev->set_next(next); | |
397 } | |
398 delete curr; | |
399 } | |
400 | |
401 | |
402 // public method for accessing the exception cache | |
403 // These are the public access methods. | |
404 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
405 // We never grab a lock to read the exception cache, so we may | |
406 // have false negatives. This is okay, as it can only happen during | |
407 // the first few exception lookups for a given nmethod. | |
408 ExceptionCache* ec = exception_cache(); | |
409 while (ec != NULL) { | |
410 address ret_val; | |
411 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
412 return ret_val; | |
413 } | |
414 ec = ec->next(); | |
415 } | |
416 return NULL; | |
417 } | |
418 | |
419 | |
420 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
421 // There are potential race conditions during exception cache updates, so we | |
422 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 423 // we don't lock during reads, it is possible to have several threads attempt |
0 | 424 // to update the cache with the same data. We need to check for already inserted |
425 // copies of the current data before adding it. | |
426 | |
427 MutexLocker ml(ExceptionCache_lock); | |
428 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
429 | |
430 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
431 target_entry = new ExceptionCache(exception,pc,handler); | |
432 add_exception_cache_entry(target_entry); | |
433 } | |
434 } | |
435 | |
436 | |
437 //-------------end of code for ExceptionCache-------------- | |
438 | |
439 | |
440 int nmethod::total_size() const { | |
441 return | |
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442 consts_size() + |
1748 | 443 insts_size() + |
0 | 444 stub_size() + |
445 scopes_data_size() + | |
446 scopes_pcs_size() + | |
447 handler_table_size() + | |
448 nul_chk_table_size(); | |
449 } | |
450 | |
451 const char* nmethod::compile_kind() const { | |
452 if (is_osr_method()) return "osr"; | |
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453 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 454 return NULL; |
455 } | |
456 | |
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457 // Fill in default values for various flag fields |
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458 void nmethod::init_defaults() { |
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459 _state = alive; |
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460 _marked_for_reclamation = 0; |
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461 _has_flushed_dependencies = 0; |
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462 _speculatively_disconnected = 0; |
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463 _has_unsafe_access = 0; |
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464 _has_method_handle_invokes = 0; |
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465 _lazy_critical_native = 0; |
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466 _has_wide_vectors = 0; |
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467 _marked_for_deoptimization = 0; |
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468 _lock_count = 0; |
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469 _stack_traversal_mark = 0; |
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470 _unload_reported = false; // jvmti state |
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471 |
1726 | 472 #ifdef ASSERT |
473 _oops_are_stale = false; | |
474 #endif | |
475 | |
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476 _oops_do_mark_link = NULL; |
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477 _jmethod_id = NULL; |
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478 _osr_link = NULL; |
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479 _scavenge_root_link = NULL; |
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480 _scavenge_root_state = 0; |
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481 _saved_nmethod_link = NULL; |
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482 _compiler = NULL; |
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483 |
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484 #ifdef HAVE_DTRACE_H |
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485 _trap_offset = 0; |
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486 #endif // def HAVE_DTRACE_H |
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487 } |
0 | 488 |
489 | |
490 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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491 int compile_id, |
0 | 492 CodeBuffer *code_buffer, |
493 int vep_offset, | |
494 int frame_complete, | |
495 int frame_size, | |
496 ByteSize basic_lock_owner_sp_offset, | |
497 ByteSize basic_lock_sp_offset, | |
498 OopMapSet* oop_maps) { | |
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499 code_buffer->finalize_oop_references(method); |
0 | 500 // create nmethod |
501 nmethod* nm = NULL; | |
502 { | |
503 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
504 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
505 CodeOffsets offsets; | |
506 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
507 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
508 nm = new (native_nmethod_size) | |
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509 nmethod(method(), native_nmethod_size, compile_id, &offsets, |
0 | 510 code_buffer, frame_size, |
511 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
512 oop_maps); | |
513 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
514 if (PrintAssembly && nm != NULL) | |
515 Disassembler::decode(nm); | |
516 } | |
517 // verify nmethod | |
518 debug_only(if (nm) nm->verify();) // might block | |
519 | |
520 if (nm != NULL) { | |
521 nm->log_new_nmethod(); | |
522 } | |
523 | |
524 return nm; | |
525 } | |
526 | |
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527 #ifdef HAVE_DTRACE_H |
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528 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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529 CodeBuffer *code_buffer, |
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530 int vep_offset, |
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531 int trap_offset, |
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532 int frame_complete, |
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533 int frame_size) { |
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534 code_buffer->finalize_oop_references(method); |
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535 // create nmethod |
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536 nmethod* nm = NULL; |
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537 { |
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538 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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539 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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540 CodeOffsets offsets; |
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541 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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542 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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543 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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544 |
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545 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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546 |
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547 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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548 if (PrintAssembly && nm != NULL) |
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549 Disassembler::decode(nm); |
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550 } |
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551 // verify nmethod |
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552 debug_only(if (nm) nm->verify();) // might block |
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553 |
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554 if (nm != NULL) { |
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555 nm->log_new_nmethod(); |
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556 } |
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557 |
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558 return nm; |
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559 } |
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560 |
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561 #endif // def HAVE_DTRACE_H |
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562 |
0 | 563 nmethod* nmethod::new_nmethod(methodHandle method, |
564 int compile_id, | |
565 int entry_bci, | |
566 CodeOffsets* offsets, | |
567 int orig_pc_offset, | |
568 DebugInformationRecorder* debug_info, | |
569 Dependencies* dependencies, | |
570 CodeBuffer* code_buffer, int frame_size, | |
571 OopMapSet* oop_maps, | |
572 ExceptionHandlerTable* handler_table, | |
573 ImplicitExceptionTable* nul_chk_table, | |
574 AbstractCompiler* compiler, | |
575 int comp_level | |
576 ) | |
577 { | |
578 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
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579 code_buffer->finalize_oop_references(method); |
0 | 580 // create nmethod |
581 nmethod* nm = NULL; | |
582 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
583 int nmethod_size = | |
584 allocation_size(code_buffer, sizeof(nmethod)) | |
585 + adjust_pcs_size(debug_info->pcs_size()) | |
586 + round_to(dependencies->size_in_bytes() , oopSize) | |
587 + round_to(handler_table->size_in_bytes(), oopSize) | |
588 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
589 + round_to(debug_info->data_size() , oopSize); | |
590 nm = new (nmethod_size) | |
591 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
592 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
593 oop_maps, | |
594 handler_table, | |
595 nul_chk_table, | |
596 compiler, | |
597 comp_level); | |
598 if (nm != NULL) { | |
599 // To make dependency checking during class loading fast, record | |
600 // the nmethod dependencies in the classes it is dependent on. | |
601 // This allows the dependency checking code to simply walk the | |
602 // class hierarchy above the loaded class, checking only nmethods | |
603 // which are dependent on those classes. The slow way is to | |
604 // check every nmethod for dependencies which makes it linear in | |
605 // the number of methods compiled. For applications with a lot | |
606 // classes the slow way is too slow. | |
607 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
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608 Klass* klass = deps.context_type(); |
0 | 609 if (klass == NULL) continue; // ignore things like evol_method |
610 | |
611 // record this nmethod as dependent on this klass | |
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612 InstanceKlass::cast(klass)->add_dependent_nmethod(nm); |
0 | 613 } |
614 } | |
615 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
616 if (PrintAssembly && nm != NULL) | |
617 Disassembler::decode(nm); | |
618 } | |
619 | |
620 // verify nmethod | |
621 debug_only(if (nm) nm->verify();) // might block | |
622 | |
623 if (nm != NULL) { | |
624 nm->log_new_nmethod(); | |
625 } | |
626 | |
627 // done | |
628 return nm; | |
629 } | |
630 | |
631 | |
632 // For native wrappers | |
633 nmethod::nmethod( | |
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634 Method* method, |
0 | 635 int nmethod_size, |
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636 int compile_id, |
0 | 637 CodeOffsets* offsets, |
638 CodeBuffer* code_buffer, | |
639 int frame_size, | |
640 ByteSize basic_lock_owner_sp_offset, | |
641 ByteSize basic_lock_sp_offset, | |
642 OopMapSet* oop_maps ) | |
643 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
644 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 645 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
646 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 647 { |
648 { | |
649 debug_only(No_Safepoint_Verifier nsv;) | |
650 assert_locked_or_safepoint(CodeCache_lock); | |
651 | |
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652 init_defaults(); |
0 | 653 _method = method; |
654 _entry_bci = InvocationEntryBci; | |
655 // We have no exception handler or deopt handler make the | |
656 // values something that will never match a pc like the nmethod vtable entry | |
657 _exception_offset = 0; | |
658 _deoptimize_offset = 0; | |
1204 | 659 _deoptimize_mh_offset = 0; |
0 | 660 _orig_pc_offset = 0; |
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661 |
1748 | 662 _consts_offset = data_offset(); |
0 | 663 _stub_offset = data_offset(); |
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664 _oops_offset = data_offset(); |
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665 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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666 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
0 | 667 _scopes_pcs_offset = _scopes_data_offset; |
668 _dependencies_offset = _scopes_pcs_offset; | |
669 _handler_table_offset = _dependencies_offset; | |
670 _nul_chk_table_offset = _handler_table_offset; | |
671 _nmethod_end_offset = _nul_chk_table_offset; | |
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672 _compile_id = compile_id; |
0 | 673 _comp_level = CompLevel_none; |
1748 | 674 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
675 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 676 _osr_entry_point = NULL; |
677 _exception_cache = NULL; | |
678 _pc_desc_cache.reset_to(NULL); | |
679 | |
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680 code_buffer->copy_values_to(this); |
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681 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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682 CodeCache::add_scavenge_root_nmethod(this); |
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683 } |
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684 debug_only(verify_scavenge_root_oops()); |
0 | 685 CodeCache::commit(this); |
686 } | |
687 | |
688 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
689 ttyLocker ttyl; // keep the following output all in one block | |
690 // This output goes directly to the tty, not the compiler log. | |
691 // To enable tools to match it up with the compilation activity, | |
692 // be sure to tag this tty output with the compile ID. | |
693 if (xtty != NULL) { | |
694 xtty->begin_head("print_native_nmethod"); | |
695 xtty->method(_method); | |
696 xtty->stamp(); | |
697 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
698 } | |
699 // print the header part first | |
700 print(); | |
701 // then print the requested information | |
702 if (PrintNativeNMethods) { | |
703 print_code(); | |
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704 if (oop_maps != NULL) { |
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705 oop_maps->print(); |
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706 } |
0 | 707 } |
708 if (PrintRelocations) { | |
709 print_relocations(); | |
710 } | |
711 if (xtty != NULL) { | |
712 xtty->tail("print_native_nmethod"); | |
713 } | |
714 } | |
715 } | |
716 | |
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717 // For dtrace wrappers |
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718 #ifdef HAVE_DTRACE_H |
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719 nmethod::nmethod( |
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720 Method* method, |
116
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721 int nmethod_size, |
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722 CodeOffsets* offsets, |
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723 CodeBuffer* code_buffer, |
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724 int frame_size) |
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725 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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726 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 727 _native_receiver_sp_offset(in_ByteSize(-1)), |
728 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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729 { |
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730 { |
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731 debug_only(No_Safepoint_Verifier nsv;) |
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732 assert_locked_or_safepoint(CodeCache_lock); |
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733 |
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734 init_defaults(); |
116
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735 _method = method; |
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736 _entry_bci = InvocationEntryBci; |
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737 // We have no exception handler or deopt handler make the |
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738 // values something that will never match a pc like the nmethod vtable entry |
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739 _exception_offset = 0; |
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740 _deoptimize_offset = 0; |
1204 | 741 _deoptimize_mh_offset = 0; |
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742 _unwind_handler_offset = -1; |
116
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743 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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744 _orig_pc_offset = 0; |
1748 | 745 _consts_offset = data_offset(); |
116
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746 _stub_offset = data_offset(); |
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747 _oops_offset = data_offset(); |
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748 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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749 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
116
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750 _scopes_pcs_offset = _scopes_data_offset; |
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751 _dependencies_offset = _scopes_pcs_offset; |
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752 _handler_table_offset = _dependencies_offset; |
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753 _nul_chk_table_offset = _handler_table_offset; |
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754 _nmethod_end_offset = _nul_chk_table_offset; |
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755 _compile_id = 0; // default |
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756 _comp_level = CompLevel_none; |
1748 | 757 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
758 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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759 _osr_entry_point = NULL; |
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760 _exception_cache = NULL; |
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761 _pc_desc_cache.reset_to(NULL); |
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762 |
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763 code_buffer->copy_values_to(this); |
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764 debug_only(verify_scavenge_root_oops()); |
116
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765 CodeCache::commit(this); |
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766 } |
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767 |
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768 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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769 ttyLocker ttyl; // keep the following output all in one block |
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770 // This output goes directly to the tty, not the compiler log. |
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771 // To enable tools to match it up with the compilation activity, |
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772 // be sure to tag this tty output with the compile ID. |
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773 if (xtty != NULL) { |
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774 xtty->begin_head("print_dtrace_nmethod"); |
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775 xtty->method(_method); |
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776 xtty->stamp(); |
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777 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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778 } |
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779 // print the header part first |
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780 print(); |
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781 // then print the requested information |
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782 if (PrintNMethods) { |
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783 print_code(); |
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784 } |
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785 if (PrintRelocations) { |
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786 print_relocations(); |
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787 } |
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788 if (xtty != NULL) { |
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789 xtty->tail("print_dtrace_nmethod"); |
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790 } |
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791 } |
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792 } |
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793 #endif // def HAVE_DTRACE_H |
0 | 794 |
795 void* nmethod::operator new(size_t size, int nmethod_size) { | |
796 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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797 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 798 return CodeCache::allocate(nmethod_size); |
799 } | |
800 | |
801 | |
802 nmethod::nmethod( | |
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803 Method* method, |
0 | 804 int nmethod_size, |
805 int compile_id, | |
806 int entry_bci, | |
807 CodeOffsets* offsets, | |
808 int orig_pc_offset, | |
809 DebugInformationRecorder* debug_info, | |
810 Dependencies* dependencies, | |
811 CodeBuffer *code_buffer, | |
812 int frame_size, | |
813 OopMapSet* oop_maps, | |
814 ExceptionHandlerTable* handler_table, | |
815 ImplicitExceptionTable* nul_chk_table, | |
816 AbstractCompiler* compiler, | |
817 int comp_level | |
818 ) | |
819 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
820 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 821 _native_receiver_sp_offset(in_ByteSize(-1)), |
822 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 823 { |
824 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
825 { | |
826 debug_only(No_Safepoint_Verifier nsv;) | |
827 assert_locked_or_safepoint(CodeCache_lock); | |
828 | |
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829 init_defaults(); |
0 | 830 _method = method; |
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831 _entry_bci = entry_bci; |
0 | 832 _compile_id = compile_id; |
833 _comp_level = comp_level; | |
834 _compiler = compiler; | |
835 _orig_pc_offset = orig_pc_offset; | |
1748 | 836 |
837 // Section offsets | |
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838 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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839 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 840 |
841 // Exception handler and deopt handler are in the stub section | |
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842 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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843 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 844 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
845 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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846 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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847 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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848 } else { |
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849 _deoptimize_mh_offset = -1; |
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850 } |
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851 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 852 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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853 } else { |
1748 | 854 _unwind_handler_offset = -1; |
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855 } |
1748 | 856 |
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857 _oops_offset = data_offset(); |
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858 _metadata_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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859 _scopes_data_offset = _metadata_offset + round_to(code_buffer->total_metadata_size(), wordSize); |
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860 |
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861 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 862 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
863 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
864 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
865 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
866 | |
1748 | 867 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
868 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
869 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 870 _exception_cache = NULL; |
871 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
872 | |
873 // Copy contents of ScopeDescRecorder to nmethod | |
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874 code_buffer->copy_values_to(this); |
0 | 875 debug_info->copy_to(this); |
876 dependencies->copy_to(this); | |
989
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877 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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878 CodeCache::add_scavenge_root_nmethod(this); |
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879 } |
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880 debug_only(verify_scavenge_root_oops()); |
0 | 881 |
882 CodeCache::commit(this); | |
883 | |
884 // Copy contents of ExceptionHandlerTable to nmethod | |
885 handler_table->copy_to(this); | |
886 nul_chk_table->copy_to(this); | |
887 | |
888 // we use the information of entry points to find out if a method is | |
889 // static or non static | |
890 assert(compiler->is_c2() || | |
891 _method->is_static() == (entry_point() == _verified_entry_point), | |
892 " entry points must be same for static methods and vice versa"); | |
893 } | |
894 | |
100
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895 bool printnmethods = PrintNMethods |
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896 || CompilerOracle::should_print(_method) |
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897 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 898 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
899 print_nmethod(printnmethods); | |
900 } | |
901 } | |
902 | |
903 | |
904 // Print a short set of xml attributes to identify this nmethod. The | |
905 // output should be embedded in some other element. | |
906 void nmethod::log_identity(xmlStream* log) const { | |
907 log->print(" compile_id='%d'", compile_id()); | |
908 const char* nm_kind = compile_kind(); | |
909 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
910 if (compiler() != NULL) { | |
911 log->print(" compiler='%s'", compiler()->name()); | |
912 } | |
1783 | 913 if (TieredCompilation) { |
914 log->print(" level='%d'", comp_level()); | |
915 } | |
0 | 916 } |
917 | |
918 | |
919 #define LOG_OFFSET(log, name) \ | |
920 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
921 log->print(" " XSTR(name) "_offset='%d'" , \ | |
922 (intptr_t)name##_begin() - (intptr_t)this) | |
923 | |
924 | |
925 void nmethod::log_new_nmethod() const { | |
926 if (LogCompilation && xtty != NULL) { | |
927 ttyLocker ttyl; | |
928 HandleMark hm; | |
929 xtty->begin_elem("nmethod"); | |
930 log_identity(xtty); | |
1748 | 931 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 932 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
933 | |
934 LOG_OFFSET(xtty, relocation); | |
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935 LOG_OFFSET(xtty, consts); |
1748 | 936 LOG_OFFSET(xtty, insts); |
0 | 937 LOG_OFFSET(xtty, stub); |
938 LOG_OFFSET(xtty, scopes_data); | |
939 LOG_OFFSET(xtty, scopes_pcs); | |
940 LOG_OFFSET(xtty, dependencies); | |
941 LOG_OFFSET(xtty, handler_table); | |
942 LOG_OFFSET(xtty, nul_chk_table); | |
943 LOG_OFFSET(xtty, oops); | |
944 | |
945 xtty->method(method()); | |
946 xtty->stamp(); | |
947 xtty->end_elem(); | |
948 } | |
949 } | |
950 | |
951 #undef LOG_OFFSET | |
952 | |
953 | |
954 // Print out more verbose output usually for a newly created nmethod. | |
2405
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955 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 956 if (st != NULL) { |
957 ttyLocker ttyl; | |
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958 if (WizardMode) { |
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959 CompileTask::print_compilation(st, this, msg, /*short_form:*/ true); |
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960 st->print_cr(" (" INTPTR_FORMAT ")", this); |
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961 } else { |
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962 CompileTask::print_compilation(st, this, msg, /*short_form:*/ false); |
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963 } |
0 | 964 } |
965 } | |
966 | |
967 | |
968 void nmethod::print_nmethod(bool printmethod) { | |
969 ttyLocker ttyl; // keep the following output all in one block | |
970 if (xtty != NULL) { | |
971 xtty->begin_head("print_nmethod"); | |
972 xtty->stamp(); | |
973 xtty->end_head(); | |
974 } | |
975 // print the header part first | |
976 print(); | |
977 // then print the requested information | |
978 if (printmethod) { | |
979 print_code(); | |
980 print_pcs(); | |
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981 if (oop_maps()) { |
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982 oop_maps()->print(); |
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983 } |
0 | 984 } |
985 if (PrintDebugInfo) { | |
986 print_scopes(); | |
987 } | |
988 if (PrintRelocations) { | |
989 print_relocations(); | |
990 } | |
991 if (PrintDependencies) { | |
992 print_dependencies(); | |
993 } | |
994 if (PrintExceptionHandlers) { | |
995 print_handler_table(); | |
996 print_nul_chk_table(); | |
997 } | |
998 if (xtty != NULL) { | |
999 xtty->tail("print_nmethod"); | |
1000 } | |
1001 } | |
1002 | |
1003 | |
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1004 // Promote one word from an assembly-time handle to a live embedded oop. |
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1005 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1006 if (handle == NULL || |
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1007 // As a special case, IC oops are initialized to 1 or -1. |
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1008 handle == (jobject) Universe::non_oop_word()) { |
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1009 (*dest) = (oop) handle; |
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1010 } else { |
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1011 (*dest) = JNIHandles::resolve_non_null(handle); |
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1012 } |
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1013 } |
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1014 |
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1015 |
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1016 // Have to have the same name because it's called by a template |
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1017 void nmethod::copy_values(GrowableArray<jobject>* array) { |
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1018 int length = array->length(); |
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1019 assert((address)(oops_begin() + length) <= (address)oops_end(), "oops big enough"); |
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1020 oop* dest = oops_begin(); |
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1021 for (int index = 0 ; index < length; index++) { |
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1022 initialize_immediate_oop(&dest[index], array->at(index)); |
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1023 } |
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1024 |
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1025 // Now we can fix up all the oops in the code. We need to do this |
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1026 // in the code because the assembler uses jobjects as placeholders. |
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1027 // The code and relocations have already been initialized by the |
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1028 // CodeBlob constructor, so it is valid even at this early point to |
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1029 // iterate over relocations and patch the code. |
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1030 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1031 } |
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1032 |
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1033 void nmethod::copy_values(GrowableArray<Metadata*>* array) { |
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1034 int length = array->length(); |
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1035 assert((address)(metadata_begin() + length) <= (address)metadata_end(), "big enough"); |
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1036 Metadata** dest = metadata_begin(); |
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1037 for (int index = 0 ; index < length; index++) { |
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1038 dest[index] = array->at(index); |
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1039 } |
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1040 } |
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1041 |
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1042 bool nmethod::is_at_poll_return(address pc) { |
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1043 RelocIterator iter(this, pc, pc+1); |
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1044 while (iter.next()) { |
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1045 if (iter.type() == relocInfo::poll_return_type) |
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1046 return true; |
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1047 } |
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1048 return false; |
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1049 } |
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1050 |
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1051 |
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1052 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1053 RelocIterator iter(this, pc, pc+1); |
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1054 while (iter.next()) { |
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1055 relocInfo::relocType t = iter.type(); |
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1056 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1057 return true; |
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1058 } |
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1059 return false; |
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1060 } |
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1061 |
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1062 |
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1063 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1064 // re-patch all oop-bearing instructions, just in case some oops moved |
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1065 RelocIterator iter(this, begin, end); |
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1066 while (iter.next()) { |
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1067 if (iter.type() == relocInfo::oop_type) { |
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1068 oop_Relocation* reloc = iter.oop_reloc(); |
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1069 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1070 oop* dest = reloc->oop_addr(); |
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1071 initialize_immediate_oop(dest, (jobject) *dest); |
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1072 } |
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1073 // Refresh the oop-related bits of this instruction. |
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1074 reloc->fix_oop_relocation(); |
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1075 } else if (iter.type() == relocInfo::metadata_type) { |
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1076 metadata_Relocation* reloc = iter.metadata_reloc(); |
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1077 reloc->fix_metadata_relocation(); |
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1078 } |
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1079 |
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1080 // There must not be any interfering patches or breakpoints. |
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1081 assert(!(iter.type() == relocInfo::breakpoint_type |
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1082 && iter.breakpoint_reloc()->active()), |
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1083 "no active breakpoint"); |
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1084 } |
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1085 } |
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1086 |
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1087 |
2375
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1088 void nmethod::verify_oop_relocations() { |
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1089 // Ensure sure that the code matches the current oop values |
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1090 RelocIterator iter(this, NULL, NULL); |
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1091 while (iter.next()) { |
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1092 if (iter.type() == relocInfo::oop_type) { |
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1093 oop_Relocation* reloc = iter.oop_reloc(); |
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1094 if (!reloc->oop_is_immediate()) { |
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1095 reloc->verify_oop_relocation(); |
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1096 } |
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1097 } |
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1098 } |
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1099 } |
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1100 |
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1101 |
0 | 1102 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1103 PcDesc* pd = pc_desc_at(pc); | |
1104 guarantee(pd != NULL, "scope must be present"); | |
1105 return new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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1106 pd->obj_decode_offset(), pd->should_reexecute(), |
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1107 pd->return_oop()); |
0 | 1108 } |
1109 | |
1110 | |
1111 void nmethod::clear_inline_caches() { | |
1112 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1113 if (is_zombie()) { | |
1114 return; | |
1115 } | |
1116 | |
1117 RelocIterator iter(this); | |
1118 while (iter.next()) { | |
1119 iter.reloc()->clear_inline_cache(); | |
1120 } | |
1121 } | |
1122 | |
1123 | |
1124 void nmethod::cleanup_inline_caches() { | |
1125 | |
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1126 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1127 |
1128 // If the method is not entrant or zombie then a JMP is plastered over the | |
1129 // first few bytes. If an oop in the old code was there, that oop | |
1130 // should not get GC'd. Skip the first few bytes of oops on | |
1131 // not-entrant methods. | |
1132 address low_boundary = verified_entry_point(); | |
1133 if (!is_in_use()) { | |
1134 low_boundary += NativeJump::instruction_size; | |
1135 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1136 // This means that the low_boundary is going to be a little too high. | |
1137 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1138 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1139 } | |
1140 | |
1141 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1142 ResourceMark rm; | |
1143 RelocIterator iter(this, low_boundary); | |
1144 while(iter.next()) { | |
1145 switch(iter.type()) { | |
1146 case relocInfo::virtual_call_type: | |
1147 case relocInfo::opt_virtual_call_type: { | |
1148 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1149 // Ok, to lookup references to zombies here | |
1150 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1151 if( cb != NULL && cb->is_nmethod() ) { | |
1152 nmethod* nm = (nmethod*)cb; | |
1153 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1154 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1155 } |
1156 break; | |
1157 } | |
1158 case relocInfo::static_call_type: { | |
1159 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1160 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1161 if( cb != NULL && cb->is_nmethod() ) { | |
1162 nmethod* nm = (nmethod*)cb; | |
1163 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1164 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1165 } |
1166 break; | |
1167 } | |
1168 } | |
1169 } | |
1170 } | |
1171 | |
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1172 // This is a private interface with the sweeper. |
0 | 1173 void nmethod::mark_as_seen_on_stack() { |
1174 assert(is_not_entrant(), "must be a non-entrant method"); | |
1644
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1175 // Set the traversal mark to ensure that the sweeper does 2 |
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1176 // cleaning passes before moving to zombie. |
0 | 1177 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1178 } | |
1179 | |
2342
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1180 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1181 // there are no activations on the stack, not in use by the VM, |
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1182 // and not in use by the ServiceThread) |
0 | 1183 bool nmethod::can_not_entrant_be_converted() { |
1184 assert(is_not_entrant(), "must be a non-entrant method"); | |
1185 | |
1186 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1187 // count can be greater than the stack traversal count before it hits the | |
1188 // nmethod for the second time. | |
2342
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1189 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1190 !is_locked_by_vm(); |
0 | 1191 } |
1192 | |
1193 void nmethod::inc_decompile_count() { | |
1783 | 1194 if (!is_compiled_by_c2()) return; |
0 | 1195 // Could be gated by ProfileTraps, but do not bother... |
6725
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1196 Method* m = method(); |
0 | 1197 if (m == NULL) return; |
6725
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1198 MethodData* mdo = m->method_data(); |
0 | 1199 if (mdo == NULL) return; |
6725
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1200 // There is a benign race here. See comments in methodData.hpp. |
0 | 1201 mdo->inc_decompile_count(); |
1202 } | |
1203 | |
1204 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1205 | |
1206 post_compiled_method_unload(); | |
1207 | |
1208 // Since this nmethod is being unloaded, make sure that dependencies | |
1209 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1210 // indicate that this work is being done during a GC. | |
1211 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1212 assert(is_alive != NULL, "Should be non-NULL"); | |
1213 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1214 flush_dependencies(is_alive); | |
1215 | |
1216 // Break cycle between nmethod & method | |
1217 if (TraceClassUnloading && WizardMode) { | |
1218 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
6725
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1219 " unloadable], Method*(" INTPTR_FORMAT |
0 | 1220 "), cause(" INTPTR_FORMAT ")", |
1221 this, (address)_method, (address)cause); | |
989
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1222 if (!Universe::heap()->is_gc_active()) |
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1223 cause->klass()->print(); |
0 | 1224 } |
941 | 1225 // Unlink the osr method, so we do not look this up again |
1226 if (is_osr_method()) { | |
1227 invalidate_osr_method(); | |
1228 } | |
6725
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1229 // If _method is already NULL the Method* is about to be unloaded, |
0 | 1230 // so we don't have to break the cycle. Note that it is possible to |
6725
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1231 // have the Method* live here, in case we unload the nmethod because |
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1232 // it is pointing to some oop (other than the Method*) being unloaded. |
0 | 1233 if (_method != NULL) { |
6725
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1234 // OSR methods point to the Method*, but the Method* does not |
0 | 1235 // point back! |
1236 if (_method->code() == this) { | |
1237 _method->clear_code(); // Break a cycle | |
1238 } | |
1239 _method = NULL; // Clear the method of this dead nmethod | |
1240 } | |
1241 // Make the class unloaded - i.e., change state and notify sweeper | |
1538
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1242 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1243 if (is_in_use()) { |
1244 // Transitioning directly from live to unloaded -- so | |
1245 // we need to force a cache clean-up; remember this | |
1246 // for later on. | |
1247 CodeCache::set_needs_cache_clean(true); | |
1248 } | |
1644
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1249 _state = unloaded; |
0 | 1250 |
1109
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1251 // Log the unloading. |
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|
1252 log_state_change(); |
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|
1253 |
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1254 // The Method* is gone at this point |
0 | 1255 assert(_method == NULL, "Tautology"); |
1256 | |
989
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1257 set_osr_link(NULL); |
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1258 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1259 NMethodSweeper::notify(this); |
1260 } | |
1261 | |
1262 void nmethod::invalidate_osr_method() { | |
1263 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1264 // Remove from list of active nmethods | |
1265 if (method() != NULL) | |
6725
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1266 InstanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); |
0 | 1267 // Set entry as invalid |
1268 _entry_bci = InvalidOSREntryBci; | |
1269 } | |
1270 | |
1109
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1271 void nmethod::log_state_change() const { |
0 | 1272 if (LogCompilation) { |
1273 if (xtty != NULL) { | |
1274 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1275 if (_state == unloaded) { |
1109
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1276 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1277 os::current_thread_id()); |
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1278 } else { |
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|
1279 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1280 os::current_thread_id(), |
1644
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1281 (_state == zombie ? " zombie='1'" : "")); |
1109
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1282 } |
0 | 1283 log_identity(xtty); |
1284 xtty->stamp(); | |
1285 xtty->end_elem(); | |
1286 } | |
1287 } | |
1644
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1288 if (PrintCompilation && _state != unloaded) { |
2405
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1289 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1290 } |
1291 } | |
1292 | |
1293 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1294 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1295 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1296 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1297 |
1644
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1298 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1299 nmethodLocker nml(this); |
1644
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1300 methodHandle the_method(method()); |
1726 | 1301 No_Safepoint_Verifier nsv; |
0 | 1302 |
1303 { | |
1109
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1304 // invalidate osr nmethod before acquiring the patching lock since |
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1305 // they both acquire leaf locks and we don't want a deadlock. |
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1306 // This logic is equivalent to the logic below for patching the |
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1307 // verified entry point of regular methods. |
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1308 if (is_osr_method()) { |
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1309 // this effectively makes the osr nmethod not entrant |
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1310 invalidate_osr_method(); |
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1311 } |
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1312 |
0 | 1313 // Enter critical section. Does not block for safepoint. |
1314 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1315 |
1644
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1316 if (_state == state) { |
1109
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1317 // another thread already performed this transition so nothing |
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1318 // to do, but return false to indicate this. |
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1319 return false; |
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1320 } |
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1321 |
0 | 1322 // The caller can be calling the method statically or through an inline |
1323 // cache call. | |
1109
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1324 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1325 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1326 SharedRuntime::get_handle_wrong_method_stub()); | |
1327 } | |
1328 | |
1644
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1329 if (is_in_use()) { |
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1330 // It's a true state change, so mark the method as decompiled. |
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1331 // Do it only for transition from alive. |
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1332 inc_decompile_count(); |
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1333 } |
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1334 |
0 | 1335 // Change state |
1644
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1336 _state = state; |
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1337 |
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1338 // Log the transition once |
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1339 log_state_change(); |
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1340 |
1644
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1341 // Remove nmethod from method. |
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1342 // We need to check if both the _code and _from_compiled_code_entry_point |
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1343 // refer to this nmethod because there is a race in setting these two fields |
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1344 // in Method* as seen in bugid 4947125. |
1644
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1345 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1346 // could be flushed and the compiler and vtable stubs could still call |
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1347 // through it. |
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1348 if (method() != NULL && (method()->code() == this || |
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1349 method()->from_compiled_entry() == verified_entry_point())) { |
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1350 HandleMark hm; |
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1351 method()->clear_code(); |
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1352 } |
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1353 |
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1354 if (state == not_entrant) { |
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1355 mark_as_seen_on_stack(); |
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1356 } |
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1357 |
0 | 1358 } // leave critical region under Patching_lock |
1359 | |
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1360 // When the nmethod becomes zombie it is no longer alive so the |
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1361 // dependencies must be flushed. nmethods in the not_entrant |
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1362 // state will be flushed later when the transition to zombie |
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1363 // happens or they get unloaded. |
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1364 if (state == zombie) { |
1726 | 1365 { |
1366 // Flushing dependecies must be done before any possible | |
1367 // safepoint can sneak in, otherwise the oops used by the | |
1368 // dependency logic could have become stale. | |
1369 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1370 flush_dependencies(NULL); | |
1371 } | |
1644
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1372 |
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1373 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1374 // event and it hasn't already been reported for this nmethod then |
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1375 // report it now. The event may have been reported earilier if the GC |
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1376 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1377 // we no longer go to a safepoint here. |
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1378 post_compiled_method_unload(); |
1726 | 1379 |
1380 #ifdef ASSERT | |
1381 // It's no longer safe to access the oops section since zombie | |
1382 // nmethods aren't scanned for GC. | |
1383 _oops_are_stale = true; | |
1384 #endif | |
1538
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1385 } else { |
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1386 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1387 } |
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1388 |
0 | 1389 if (TraceCreateZombies) { |
1390 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1391 } | |
1392 | |
1393 // Make sweeper aware that there is a zombie method that needs to be removed | |
1394 NMethodSweeper::notify(this); | |
1395 | |
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1396 return true; |
0 | 1397 } |
1398 | |
1399 void nmethod::flush() { | |
1400 // Note that there are no valid oops in the nmethod anymore. | |
1401 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1402 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1403 | |
1404 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
1538
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1405 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1406 |
1407 // completely deallocate this method | |
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1408 Events::log(JavaThread::current(), "flushing nmethod " INTPTR_FORMAT, this); |
0 | 1409 if (PrintMethodFlushing) { |
1202 | 1410 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1411 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1412 } |
1413 | |
1414 // We need to deallocate any ExceptionCache data. | |
1415 // Note that we do not need to grab the nmethod lock for this, it | |
1416 // better be thread safe if we're disposing of it! | |
1417 ExceptionCache* ec = exception_cache(); | |
1418 set_exception_cache(NULL); | |
1419 while(ec != NULL) { | |
1420 ExceptionCache* next = ec->next(); | |
1421 delete ec; | |
1422 ec = next; | |
1423 } | |
1424 | |
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1425 if (on_scavenge_root_list()) { |
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1426 CodeCache::drop_scavenge_root_nmethod(this); |
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1427 } |
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1428 |
1202 | 1429 if (is_speculatively_disconnected()) { |
1430 CodeCache::remove_saved_code(this); | |
1431 } | |
1432 | |
1692 | 1433 #ifdef SHARK |
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1434 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1435 #endif // SHARK |
1436 | |
0 | 1437 ((CodeBlob*)(this))->flush(); |
1438 | |
1439 CodeCache::free(this); | |
1440 } | |
1441 | |
1442 | |
1443 // | |
1444 // Notify all classes this nmethod is dependent on that it is no | |
1445 // longer dependent. This should only be called in two situations. | |
1446 // First, when a nmethod transitions to a zombie all dependents need | |
1447 // to be clear. Since zombification happens at a safepoint there's no | |
1448 // synchronization issues. The second place is a little more tricky. | |
1449 // During phase 1 of mark sweep class unloading may happen and as a | |
1450 // result some nmethods may get unloaded. In this case the flushing | |
1451 // of dependencies must happen during phase 1 since after GC any | |
1452 // dependencies in the unloaded nmethod won't be updated, so | |
1453 // traversing the dependency information in unsafe. In that case this | |
1454 // function is called with a non-NULL argument and this function only | |
1455 // notifies instanceKlasses that are reachable | |
1456 | |
1457 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
1538
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1458 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1459 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1460 "is_alive is non-NULL if and only if we are called during GC"); | |
1461 if (!has_flushed_dependencies()) { | |
1462 set_has_flushed_dependencies(); | |
1463 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
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1464 Klass* klass = deps.context_type(); |
0 | 1465 if (klass == NULL) continue; // ignore things like evol_method |
1466 | |
1467 // During GC the is_alive closure is non-NULL, and is used to | |
1468 // determine liveness of dependees that need to be updated. | |
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1469 if (is_alive == NULL || klass->is_loader_alive(is_alive)) { |
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1470 InstanceKlass::cast(klass)->remove_dependent_nmethod(this); |
0 | 1471 } |
1472 } | |
1473 } | |
1474 } | |
1475 | |
1476 | |
1477 // If this oop is not live, the nmethod can be unloaded. | |
1478 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1479 OopClosure* keep_alive, | |
1480 oop* root, bool unloading_occurred) { | |
1481 assert(root != NULL, "just checking"); | |
1482 oop obj = *root; | |
1483 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1484 return false; | |
1485 } | |
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1486 |
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1487 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1488 // simply because one of its constant oops has gone dead. |
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1489 // No actual classes need to be unloaded in order for this to occur. |
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1490 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1491 make_unloaded(is_alive, obj); |
1492 return true; | |
1493 } | |
1494 | |
1495 // ------------------------------------------------------------------ | |
1496 // post_compiled_method_load_event | |
1497 // new method for install_code() path | |
1498 // Transfer information from compilation to jvmti | |
1499 void nmethod::post_compiled_method_load_event() { | |
1500 | |
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1501 Method* moop = method(); |
4006 | 1502 #ifndef USDT2 |
0 | 1503 HS_DTRACE_PROBE8(hotspot, compiled__method__load, |
1504 moop->klass_name()->bytes(), | |
1505 moop->klass_name()->utf8_length(), | |
1506 moop->name()->bytes(), | |
1507 moop->name()->utf8_length(), | |
1508 moop->signature()->bytes(), | |
1509 moop->signature()->utf8_length(), | |
1748 | 1510 insts_begin(), insts_size()); |
4006 | 1511 #else /* USDT2 */ |
1512 HOTSPOT_COMPILED_METHOD_LOAD( | |
1513 (char *) moop->klass_name()->bytes(), | |
1514 moop->klass_name()->utf8_length(), | |
1515 (char *) moop->name()->bytes(), | |
1516 moop->name()->utf8_length(), | |
1517 (char *) moop->signature()->bytes(), | |
1518 moop->signature()->utf8_length(), | |
1519 insts_begin(), insts_size()); | |
1520 #endif /* USDT2 */ | |
0 | 1521 |
1616
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1522 if (JvmtiExport::should_post_compiled_method_load() || |
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1523 JvmtiExport::should_post_compiled_method_unload()) { |
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1524 get_and_cache_jmethod_id(); |
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1525 } |
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1526 |
0 | 1527 if (JvmtiExport::should_post_compiled_method_load()) { |
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1528 // Let the Service thread (which is a real Java thread) post the event |
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1529 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1530 JvmtiDeferredEventQueue::enqueue( |
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|
1531 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1532 } |
1533 } | |
1534 | |
1616
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1535 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1536 if (_jmethod_id == NULL) { |
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1537 // Cache the jmethod_id since it can no longer be looked up once the |
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1538 // method itself has been marked for unloading. |
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1539 _jmethod_id = method()->jmethod_id(); |
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|
1540 } |
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|
1541 return _jmethod_id; |
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1542 } |
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1543 |
0 | 1544 void nmethod::post_compiled_method_unload() { |
1577
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1545 if (unload_reported()) { |
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1546 // During unloading we transition to unloaded and then to zombie |
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1547 // and the unloading is reported during the first transition. |
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1548 return; |
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1549 } |
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1550 |
0 | 1551 assert(_method != NULL && !is_unloaded(), "just checking"); |
1552 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1553 | |
1554 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1555 // post the event. Sometime later this nmethod will be made a zombie |
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1556 // by the sweeper but the Method* will not be valid at that point. |
1616
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1557 // If the _jmethod_id is null then no load event was ever requested |
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1558 // so don't bother posting the unload. The main reason for this is |
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1559 // that the jmethodID is a weak reference to the Method* so if |
1616
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1560 // it's being unloaded there's no way to look it up since the weak |
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1561 // ref will have been cleared. |
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1562 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1563 assert(!unload_reported(), "already unloaded"); |
2195
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1564 JvmtiDeferredEvent event = |
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1565 JvmtiDeferredEvent::compiled_method_unload_event(this, |
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1566 _jmethod_id, insts_begin()); |
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1567 if (SafepointSynchronize::is_at_safepoint()) { |
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1568 // Don't want to take the queueing lock. Add it as pending and |
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1569 // it will get enqueued later. |
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1570 JvmtiDeferredEventQueue::add_pending_event(event); |
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1571 } else { |
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1572 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1573 JvmtiDeferredEventQueue::enqueue(event); |
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1574 } |
0 | 1575 } |
1576 | |
1577 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1578 // any time. As the nmethod is being unloaded now we mark it has | |
1579 // having the unload event reported - this will ensure that we don't | |
1580 // attempt to report the event in the unlikely scenario where the | |
1581 // event is enabled at the time the nmethod is made a zombie. | |
1582 set_unload_reported(); | |
1583 } | |
1584 | |
1585 // This is called at the end of the strong tracing/marking phase of a | |
1586 // GC to unload an nmethod if it contains otherwise unreachable | |
1587 // oops. | |
1588 | |
1589 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1590 OopClosure* keep_alive, bool unloading_occurred) { | |
1591 // Make sure the oop's ready to receive visitors | |
1592 assert(!is_zombie() && !is_unloaded(), | |
1593 "should not call follow on zombie or unloaded nmethod"); | |
1594 | |
1595 // If the method is not entrant then a JMP is plastered over the | |
1596 // first few bytes. If an oop in the old code was there, that oop | |
1597 // should not get GC'd. Skip the first few bytes of oops on | |
1598 // not-entrant methods. | |
1599 address low_boundary = verified_entry_point(); | |
1600 if (is_not_entrant()) { | |
1601 low_boundary += NativeJump::instruction_size; | |
1602 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1603 // (See comment above.) | |
1604 } | |
1605 | |
1606 // The RedefineClasses() API can cause the class unloading invariant | |
1607 // to no longer be true. See jvmtiExport.hpp for details. | |
1608 // Also, leave a debugging breadcrumb in local flag. | |
1609 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1610 if (a_class_was_redefined) { | |
1611 // This set of the unloading_occurred flag is done before the | |
1612 // call to post_compiled_method_unload() so that the unloading | |
1613 // of this nmethod is reported. | |
1614 unloading_occurred = true; | |
1615 } | |
1616 | |
1617 // Exception cache | |
1618 ExceptionCache* ec = exception_cache(); | |
1619 while (ec != NULL) { | |
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1620 Klass* ex_klass = ec->exception_type(); |
0 | 1621 ExceptionCache* next_ec = ec->next(); |
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1622 if (ex_klass != NULL && !ex_klass->is_loader_alive(is_alive)) { |
0 | 1623 remove_from_exception_cache(ec); |
1624 } | |
1625 ec = next_ec; | |
1626 } | |
1627 | |
1628 // If class unloading occurred we first iterate over all inline caches and | |
1629 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1630 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1631 // iteration below. | |
1632 if (unloading_occurred) { | |
1633 RelocIterator iter(this, low_boundary); | |
1634 while(iter.next()) { | |
1635 if (iter.type() == relocInfo::virtual_call_type) { | |
1636 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
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1637 if (ic->is_icholder_call()) { |
0 | 1638 // The only exception is compiledICHolder oops which may |
1639 // yet be marked below. (We check this further below). | |
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1640 CompiledICHolder* cichk_oop = ic->cached_icholder(); |
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1641 if (cichk_oop->holder_method()->method_holder()->is_loader_alive(is_alive) && |
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1642 cichk_oop->holder_klass()->is_loader_alive(is_alive)) { |
0 | 1643 continue; |
1644 } | |
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1645 } else { |
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1646 Metadata* ic_oop = ic->cached_metadata(); |
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1647 if (ic_oop != NULL) { |
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1648 if (ic_oop->is_klass()) { |
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1649 if (((Klass*)ic_oop)->is_loader_alive(is_alive)) { |
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1650 continue; |
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1651 } |
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1652 } else if (ic_oop->is_method()) { |
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1653 if (((Method*)ic_oop)->method_holder()->is_loader_alive(is_alive)) { |
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1654 continue; |
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1655 } |
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1656 } else { |
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1657 ShouldNotReachHere(); |
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1658 } |
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1659 } |
0 | 1660 } |
1661 ic->set_to_clean(); | |
1662 } | |
1663 } | |
1664 } | |
1665 | |
1666 // Compiled code | |
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1667 { |
0 | 1668 RelocIterator iter(this, low_boundary); |
1669 while (iter.next()) { | |
1670 if (iter.type() == relocInfo::oop_type) { | |
1671 oop_Relocation* r = iter.oop_reloc(); | |
1672 // In this loop, we must only traverse those oops directly embedded in | |
1673 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1674 assert(1 == (r->oop_is_immediate()) + | |
1675 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1676 "oop must be found in exactly one place"); | |
1677 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1678 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1679 return; | |
1680 } | |
1681 } | |
1682 } | |
1683 } | |
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1684 } |
0 | 1685 |
1686 | |
1687 // Scopes | |
1688 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1689 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1690 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1691 return; | |
1692 } | |
1693 } | |
1694 | |
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1695 // Ensure that all metadata is still alive |
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1696 verify_metadata_loaders(low_boundary, is_alive); |
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1697 } |
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1698 |
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1699 #ifdef ASSERT |
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1700 |
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1701 class CheckClass : AllStatic { |
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1702 static BoolObjectClosure* _is_alive; |
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1703 |
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1704 // Check class_loader is alive for this bit of metadata. |
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1705 static void check_class(Metadata* md) { |
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1706 Klass* klass = NULL; |
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1707 if (md->is_klass()) { |
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1708 klass = ((Klass*)md); |
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1709 } else if (md->is_method()) { |
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1710 klass = ((Method*)md)->method_holder(); |
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1711 } else if (md->is_methodData()) { |
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1712 klass = ((MethodData*)md)->method()->method_holder(); |
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1713 } else { |
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1714 md->print(); |
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1715 ShouldNotReachHere(); |
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1716 } |
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1717 assert(klass->is_loader_alive(_is_alive), "must be alive"); |
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1718 } |
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1719 public: |
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1720 static void do_check_class(BoolObjectClosure* is_alive, nmethod* nm) { |
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1721 assert(SafepointSynchronize::is_at_safepoint(), "this is only ok at safepoint"); |
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1722 _is_alive = is_alive; |
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1723 nm->metadata_do(check_class); |
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1724 } |
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1725 }; |
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1726 |
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1727 // This is called during a safepoint so can use static data |
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1728 BoolObjectClosure* CheckClass::_is_alive = NULL; |
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1729 #endif // ASSERT |
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1730 |
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1731 |
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1732 // Processing of oop references should have been sufficient to keep |
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1733 // all strong references alive. Any weak references should have been |
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1734 // cleared as well. Visit all the metadata and ensure that it's |
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1735 // really alive. |
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1736 void nmethod::verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive) { |
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1737 #ifdef ASSERT |
0 | 1738 RelocIterator iter(this, low_boundary); |
1739 while (iter.next()) { | |
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1740 // static_stub_Relocations may have dangling references to |
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1741 // Method*s so trim them out here. Otherwise it looks like |
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1742 // compiled code is maintaining a link to dead metadata. |
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1743 address static_call_addr = NULL; |
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1744 if (iter.type() == relocInfo::opt_virtual_call_type) { |
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1745 CompiledIC* cic = CompiledIC_at(iter.reloc()); |
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1746 if (!cic->is_call_to_interpreted()) { |
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1747 static_call_addr = iter.addr(); |
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1748 } |
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1749 } else if (iter.type() == relocInfo::static_call_type) { |
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1750 CompiledStaticCall* csc = compiledStaticCall_at(iter.reloc()); |
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1751 if (!csc->is_call_to_interpreted()) { |
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1752 static_call_addr = iter.addr(); |
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1753 } |
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1754 } |
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1755 if (static_call_addr != NULL) { |
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1756 RelocIterator sciter(this, low_boundary); |
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1757 while (sciter.next()) { |
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1758 if (sciter.type() == relocInfo::static_stub_type && |
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1759 sciter.static_stub_reloc()->static_call() == static_call_addr) { |
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1760 sciter.static_stub_reloc()->clear_inline_cache(); |
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1761 } |
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1762 } |
0 | 1763 } |
1764 } | |
6725
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1765 // Check that the metadata embedded in the nmethod is alive |
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1766 CheckClass::do_check_class(is_alive, this); |
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1767 #endif |
0 | 1768 } |
1769 | |
6725
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1770 |
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1771 // Iterate over metadata calling this function. Used by RedefineClasses |
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1772 void nmethod::metadata_do(void f(Metadata*)) { |
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1773 address low_boundary = verified_entry_point(); |
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1774 if (is_not_entrant()) { |
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1775 low_boundary += NativeJump::instruction_size; |
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1776 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. |
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1777 // (See comment above.) |
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1778 } |
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1779 { |
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1780 // Visit all immediate references that are embedded in the instruction stream. |
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1781 RelocIterator iter(this, low_boundary); |
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1782 while (iter.next()) { |
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1783 if (iter.type() == relocInfo::metadata_type ) { |
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1784 metadata_Relocation* r = iter.metadata_reloc(); |
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1785 // In this lmetadata, we must only follow those metadatas directly embedded in |
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1786 // the code. Other metadatas (oop_index>0) are seen as part of |
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1787 // the metadata section below. |
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1788 assert(1 == (r->metadata_is_immediate()) + |
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1789 (r->metadata_addr() >= metadata_begin() && r->metadata_addr() < metadata_end()), |
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1790 "metadata must be found in exactly one place"); |
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1791 if (r->metadata_is_immediate() && r->metadata_value() != NULL) { |
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1792 Metadata* md = r->metadata_value(); |
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1793 f(md); |
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1794 } |
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1795 } |
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1796 } |
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1797 } |
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1798 |
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1799 // Visit the metadata section |
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1800 for (Metadata** p = metadata_begin(); p < metadata_end(); p++) { |
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1801 if (*p == Universe::non_oop_word() || *p == NULL) continue; // skip non-oops |
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1802 Metadata* md = *p; |
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1803 f(md); |
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1804 } |
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1805 // Call function Method*, not embedded in these other places. |
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1806 if (_method != NULL) f(_method); |
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1807 } |
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1808 |
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1809 |
941 | 1810 // This method is called twice during GC -- once while |
1811 // tracing the "active" nmethods on thread stacks during | |
1812 // the (strong) marking phase, and then again when walking | |
1813 // the code cache contents during the weak roots processing | |
1814 // phase. The two uses are distinguished by means of the | |
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1815 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1816 // case. We want to walk the weak roots in the nmethod |
1817 // only in the second case. The weak roots in the nmethod | |
1818 // are the oops in the ExceptionCache and the InlineCache | |
1819 // oops. | |
994
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1820 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1821 // make sure the oops ready to receive visitors |
1822 assert(!is_zombie() && !is_unloaded(), | |
1823 "should not call follow on zombie or unloaded nmethod"); | |
1824 | |
1825 // If the method is not entrant or zombie then a JMP is plastered over the | |
1826 // first few bytes. If an oop in the old code was there, that oop | |
1827 // should not get GC'd. Skip the first few bytes of oops on | |
1828 // not-entrant methods. | |
1829 address low_boundary = verified_entry_point(); | |
1830 if (is_not_entrant()) { | |
1831 low_boundary += NativeJump::instruction_size; | |
1832 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1833 // (See comment above.) | |
1834 } | |
1835 | |
1836 RelocIterator iter(this, low_boundary); | |
941 | 1837 |
0 | 1838 while (iter.next()) { |
1839 if (iter.type() == relocInfo::oop_type ) { | |
1840 oop_Relocation* r = iter.oop_reloc(); | |
1841 // In this loop, we must only follow those oops directly embedded in | |
1842 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1843 assert(1 == (r->oop_is_immediate()) + |
1844 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1845 "oop must be found in exactly one place"); | |
0 | 1846 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1847 f->do_oop(r->oop_addr()); | |
1848 } | |
1849 } | |
1850 } | |
1851 | |
1852 // Scopes | |
989
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1853 // This includes oop constants not inlined in the code stream. |
0 | 1854 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1855 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1856 f->do_oop(p); | |
1857 } | |
1858 } | |
1859 | |
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1860 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1861 |
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1862 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1863 |
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1864 // An nmethod is "marked" if its _mark_link is set non-null. |
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1865 // Even if it is the end of the linked list, it will have a non-null link value, |
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1866 // as long as it is on the list. |
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1867 // This code must be MP safe, because it is used from parallel GC passes. |
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1868 bool nmethod::test_set_oops_do_mark() { |
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1869 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1870 nmethod* observed_mark_link = _oops_do_mark_link; |
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1871 if (observed_mark_link == NULL) { |
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1872 // Claim this nmethod for this thread to mark. |
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1873 observed_mark_link = (nmethod*) |
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1874 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1875 if (observed_mark_link == NULL) { |
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1876 |
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1877 // Atomically append this nmethod (now claimed) to the head of the list: |
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1878 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1879 for (;;) { |
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1880 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1881 _oops_do_mark_link = required_mark_nmethods; |
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1882 observed_mark_nmethods = (nmethod*) |
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1883 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1884 if (observed_mark_nmethods == required_mark_nmethods) |
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1885 break; |
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1886 } |
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1887 // Mark was clear when we first saw this guy. |
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1888 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
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1889 return false; |
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1890 } |
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1891 } |
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1892 // On fall through, another racing thread marked this nmethod before we did. |
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1893 return true; |
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1894 } |
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1895 |
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1896 void nmethod::oops_do_marking_prologue() { |
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1897 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1898 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1899 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1900 // may fork a bunch of threads, and we need them all to see the same state. |
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1901 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1902 guarantee(observed == NULL, "no races in this sequential code"); |
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1903 } |
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1904 |
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1905 void nmethod::oops_do_marking_epilogue() { |
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1906 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1907 nmethod* cur = _oops_do_mark_nmethods; |
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1908 while (cur != NMETHOD_SENTINEL) { |
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1909 assert(cur != NULL, "not NULL-terminated"); |
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1910 nmethod* next = cur->_oops_do_mark_link; |
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1911 cur->_oops_do_mark_link = NULL; |
2375
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1912 cur->fix_oop_relocations(); |
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1913 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
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1914 cur = next; |
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1915 } |
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1916 void* required = _oops_do_mark_nmethods; |
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1917 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1918 guarantee(observed == required, "no races in this sequential code"); |
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1919 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1920 } |
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1921 |
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1922 class DetectScavengeRoot: public OopClosure { |
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1923 bool _detected_scavenge_root; |
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1924 public: |
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1925 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1926 { NOT_PRODUCT(_print_nm = NULL); } |
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1927 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1928 virtual void do_oop(oop* p) { |
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1929 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1930 NOT_PRODUCT(maybe_print(p)); |
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1931 _detected_scavenge_root = true; |
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1932 } |
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1933 } |
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1934 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1935 |
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1936 #ifndef PRODUCT |
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1937 nmethod* _print_nm; |
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1938 void maybe_print(oop* p) { |
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1939 if (_print_nm == NULL) return; |
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1940 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1941 tty->print_cr(""PTR_FORMAT"[offset=%d] detected scavengable oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1942 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1943 (intptr_t)(*p), (intptr_t)p); |
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1944 (*p)->print(); |
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1945 } |
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1946 #endif //PRODUCT |
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1947 }; |
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1948 |
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1949 bool nmethod::detect_scavenge_root_oops() { |
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1950 DetectScavengeRoot detect_scavenge_root; |
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1951 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1952 oops_do(&detect_scavenge_root); |
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1953 return detect_scavenge_root.detected_scavenge_root(); |
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1954 } |
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1955 |
0 | 1956 // Method that knows how to preserve outgoing arguments at call. This method must be |
1957 // called with a frame corresponding to a Java invoke | |
1958 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1959 #ifndef SHARK |
0 | 1960 if (!method()->is_native()) { |
1961 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1962 Bytecode_invoke call(ssd.method(), ssd.bci()); |
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1963 // compiled invokedynamic call sites have an implicit receiver at |
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1964 // resolution time, so make sure it gets GC'ed. |
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1965 bool has_receiver = !call.is_invokestatic(); |
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1966 Symbol* signature = call.signature(); |
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1967 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1968 } |
1692 | 1969 #endif // !SHARK |
0 | 1970 } |
1971 | |
1972 | |
1973 oop nmethod::embeddedOop_at(u_char* p) { | |
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1974 RelocIterator iter(this, p, p + 1); |
0 | 1975 while (iter.next()) |
1976 if (iter.type() == relocInfo::oop_type) { | |
1977 return iter.oop_reloc()->oop_value(); | |
1978 } | |
1979 return NULL; | |
1980 } | |
1981 | |
1982 | |
1983 inline bool includes(void* p, void* from, void* to) { | |
1984 return from <= p && p < to; | |
1985 } | |
1986 | |
1987 | |
1988 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1989 assert(count >= 2, "must be sentinel values, at least"); | |
1990 | |
1991 #ifdef ASSERT | |
1992 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1993 int prev_offset = pcs[0].pc_offset(); | |
1994 assert(prev_offset == PcDesc::lower_offset_limit, | |
1995 "must start with a sentinel"); | |
1996 for (int i = 1; i < count; i++) { | |
1997 int this_offset = pcs[i].pc_offset(); | |
1998 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1999 prev_offset = this_offset; | |
2000 } | |
2001 assert(prev_offset == PcDesc::upper_offset_limit, | |
2002 "must end with a sentinel"); | |
2003 #endif //ASSERT | |
2004 | |
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2005 // Search for MethodHandle invokes and tag the nmethod. |
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2006 for (int i = 0; i < count; i++) { |
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2007 if (pcs[i].is_method_handle_invoke()) { |
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2008 set_has_method_handle_invokes(true); |
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2009 break; |
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2010 } |
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2011 } |
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2012 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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2013 |
0 | 2014 int size = count * sizeof(PcDesc); |
2015 assert(scopes_pcs_size() >= size, "oob"); | |
2016 memcpy(scopes_pcs_begin(), pcs, size); | |
2017 | |
2018 // Adjust the final sentinel downward. | |
2019 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
2020 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 2021 last_pc->set_pc_offset(content_size() + 1); |
0 | 2022 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
2023 // Fill any rounding gaps with copies of the last record. | |
2024 last_pc[1] = last_pc[0]; | |
2025 } | |
2026 // The following assert could fail if sizeof(PcDesc) is not | |
2027 // an integral multiple of oopSize (the rounding term). | |
2028 // If it fails, change the logic to always allocate a multiple | |
2029 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
2030 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
2031 } | |
2032 | |
2033 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
2034 assert(scopes_data_size() >= size, "oob"); | |
2035 memcpy(scopes_data_begin(), buffer, size); | |
2036 } | |
2037 | |
2038 | |
2039 #ifdef ASSERT | |
2040 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
2041 PcDesc* lower = nm->scopes_pcs_begin(); | |
2042 PcDesc* upper = nm->scopes_pcs_end(); | |
2043 lower += 1; // exclude initial sentinel | |
2044 PcDesc* res = NULL; | |
2045 for (PcDesc* p = lower; p < upper; p++) { | |
2046 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
2047 if (match_desc(p, pc_offset, approximate)) { | |
2048 if (res == NULL) | |
2049 res = p; | |
2050 else | |
2051 res = (PcDesc*) badAddress; | |
2052 } | |
2053 } | |
2054 return res; | |
2055 } | |
2056 #endif | |
2057 | |
2058 | |
2059 // Finds a PcDesc with real-pc equal to "pc" | |
2060 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 2061 address base_address = code_begin(); |
0 | 2062 if ((pc < base_address) || |
2063 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
2064 return NULL; // PC is wildly out of range | |
2065 } | |
2066 int pc_offset = (int) (pc - base_address); | |
2067 | |
2068 // Check the PcDesc cache if it contains the desired PcDesc | |
2069 // (This as an almost 100% hit rate.) | |
2070 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
2071 if (res != NULL) { | |
2072 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
2073 return res; | |
2074 } | |
2075 | |
2076 // Fallback algorithm: quasi-linear search for the PcDesc | |
2077 // Find the last pc_offset less than the given offset. | |
2078 // The successor must be the required match, if there is a match at all. | |
2079 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
2080 PcDesc* lower = scopes_pcs_begin(); | |
2081 PcDesc* upper = scopes_pcs_end(); | |
2082 upper -= 1; // exclude final sentinel | |
2083 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
2084 | |
2085 #define assert_LU_OK \ | |
2086 /* invariant on lower..upper during the following search: */ \ | |
2087 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2088 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2089 assert_LU_OK; | |
2090 | |
2091 // Use the last successful return as a split point. | |
2092 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2093 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2094 if (mid->pc_offset() < pc_offset) { | |
2095 lower = mid; | |
2096 } else { | |
2097 upper = mid; | |
2098 } | |
2099 | |
2100 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2101 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2102 const int RADIX = (1 << LOG2_RADIX); | |
2103 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2104 while ((mid = lower + step) < upper) { | |
2105 assert_LU_OK; | |
2106 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2107 if (mid->pc_offset() < pc_offset) { | |
2108 lower = mid; | |
2109 } else { | |
2110 upper = mid; | |
2111 break; | |
2112 } | |
2113 } | |
2114 assert_LU_OK; | |
2115 } | |
2116 | |
2117 // Sneak up on the value with a linear search of length ~16. | |
2118 while (true) { | |
2119 assert_LU_OK; | |
2120 mid = lower + 1; | |
2121 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2122 if (mid->pc_offset() < pc_offset) { | |
2123 lower = mid; | |
2124 } else { | |
2125 upper = mid; | |
2126 break; | |
2127 } | |
2128 } | |
2129 #undef assert_LU_OK | |
2130 | |
2131 if (match_desc(upper, pc_offset, approximate)) { | |
2132 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2133 _pc_desc_cache.add_pc_desc(upper); | |
2134 return upper; | |
2135 } else { | |
2136 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2137 return NULL; | |
2138 } | |
2139 } | |
2140 | |
2141 | |
2142 bool nmethod::check_all_dependencies() { | |
2143 bool found_check = false; | |
2144 // wholesale check of all dependencies | |
2145 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2146 if (deps.check_dependency() != NULL) { | |
2147 found_check = true; | |
2148 NOT_DEBUG(break); | |
2149 } | |
2150 } | |
2151 return found_check; // tell caller if we found anything | |
2152 } | |
2153 | |
2154 bool nmethod::check_dependency_on(DepChange& changes) { | |
2155 // What has happened: | |
2156 // 1) a new class dependee has been added | |
2157 // 2) dependee and all its super classes have been marked | |
2158 bool found_check = false; // set true if we are upset | |
2159 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2160 // Evaluate only relevant dependencies. | |
2161 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2162 found_check = true; | |
2163 NOT_DEBUG(break); | |
2164 } | |
2165 } | |
2166 return found_check; | |
2167 } | |
2168 | |
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2169 bool nmethod::is_evol_dependent_on(Klass* dependee) { |
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2170 InstanceKlass *dependee_ik = InstanceKlass::cast(dependee); |
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2171 Array<Method*>* dependee_methods = dependee_ik->methods(); |
0 | 2172 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2173 if (deps.type() == Dependencies::evol_method) { | |
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2174 Method* method = deps.method_argument(0); |
0 | 2175 for (int j = 0; j < dependee_methods->length(); j++) { |
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2176 if (dependee_methods->at(j) == method) { |
0 | 2177 // RC_TRACE macro has an embedded ResourceMark |
2178 RC_TRACE(0x01000000, | |
2179 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
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2180 _method->method_holder()->external_name(), |
0 | 2181 _method->name()->as_C_string(), |
2182 _method->signature()->as_C_string(), compile_id(), | |
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2183 method->method_holder()->external_name(), |
0 | 2184 method->name()->as_C_string(), |
2185 method->signature()->as_C_string())); | |
2186 if (TraceDependencies || LogCompilation) | |
2187 deps.log_dependency(dependee); | |
2188 return true; | |
2189 } | |
2190 } | |
2191 } | |
2192 } | |
2193 return false; | |
2194 } | |
2195 | |
2196 // Called from mark_for_deoptimization, when dependee is invalidated. | |
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2197 bool nmethod::is_dependent_on_method(Method* dependee) { |
0 | 2198 for (Dependencies::DepStream deps(this); deps.next(); ) { |
2199 if (deps.type() != Dependencies::evol_method) | |
2200 continue; | |
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2201 Method* method = deps.method_argument(0); |
0 | 2202 if (method == dependee) return true; |
2203 } | |
2204 return false; | |
2205 } | |
2206 | |
2207 | |
2208 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2209 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2210 if (is_zombie()) { |
2211 // a zombie may never be patched | |
2212 return false; | |
2213 } | |
2214 return true; | |
2215 } | |
2216 | |
2217 | |
2218 address nmethod::continuation_for_implicit_exception(address pc) { | |
2219 // Exception happened outside inline-cache check code => we are inside | |
2220 // an active nmethod => use cpc to determine a return address | |
1748 | 2221 int exception_offset = pc - code_begin(); |
0 | 2222 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2223 #ifdef ASSERT | |
2224 if (cont_offset == 0) { | |
2225 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2226 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2227 HandleMark hm(thread); | |
2228 ResourceMark rm(thread); | |
2229 CodeBlob* cb = CodeCache::find_blob(pc); | |
2230 assert(cb != NULL && cb == this, ""); | |
2231 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2232 print(); | |
2233 method()->print_codes(); | |
2234 print_code(); | |
2235 print_pcs(); | |
2236 } | |
2237 #endif | |
1250 | 2238 if (cont_offset == 0) { |
2239 // Let the normal error handling report the exception | |
2240 return NULL; | |
2241 } | |
1748 | 2242 return code_begin() + cont_offset; |
0 | 2243 } |
2244 | |
2245 | |
2246 | |
2247 void nmethod_init() { | |
2248 // make sure you didn't forget to adjust the filler fields | |
2249 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2250 } | |
2251 | |
2252 | |
2253 //------------------------------------------------------------------------------------------- | |
2254 | |
2255 | |
2256 // QQQ might we make this work from a frame?? | |
2257 nmethodLocker::nmethodLocker(address pc) { | |
2258 CodeBlob* cb = CodeCache::find_blob(pc); | |
2259 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2260 _nm = (nmethod*)cb; | |
2261 lock_nmethod(_nm); | |
2262 } | |
2263 | |
2342
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2264 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2265 // should pass zombie_ok == true. |
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2266 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2267 if (nm == NULL) return; |
2268 Atomic::inc(&nm->_lock_count); | |
2342
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2269 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2270 } |
2271 | |
2272 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2273 if (nm == NULL) return; | |
2274 Atomic::dec(&nm->_lock_count); | |
2275 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2276 } | |
2277 | |
1204 | 2278 |
2279 // ----------------------------------------------------------------------------- | |
2280 // nmethod::get_deopt_original_pc | |
2281 // | |
2282 // Return the original PC for the given PC if: | |
2283 // (a) the given PC belongs to a nmethod and | |
2284 // (b) it is a deopt PC | |
2285 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2286 if (fr->cb() == NULL) return NULL; | |
2287 | |
2288 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2289 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2290 return nm->get_original_pc(fr); | |
2291 | |
2292 return NULL; | |
0 | 2293 } |
2294 | |
2295 | |
2296 // ----------------------------------------------------------------------------- | |
1135
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2297 // MethodHandle |
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2298 |
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2299 bool nmethod::is_method_handle_return(address return_pc) { |
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2300 if (!has_method_handle_invokes()) return false; |
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2301 PcDesc* pd = pc_desc_at(return_pc); |
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2302 if (pd == NULL) |
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2303 return false; |
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2304 return pd->is_method_handle_invoke(); |
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2305 } |
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2306 |
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2307 |
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2308 // ----------------------------------------------------------------------------- |
0 | 2309 // Verification |
2310 | |
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2311 class VerifyOopsClosure: public OopClosure { |
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2312 nmethod* _nm; |
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2313 bool _ok; |
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2314 public: |
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2315 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2316 bool ok() { return _ok; } |
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2317 virtual void do_oop(oop* p) { |
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2318 if ((*p) == NULL || (*p)->is_oop()) return; |
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2319 if (_ok) { |
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2320 _nm->print_nmethod(true); |
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2321 _ok = false; |
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2322 } |
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2323 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2324 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2325 } |
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2326 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2327 }; |
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2328 |
0 | 2329 void nmethod::verify() { |
2330 | |
2331 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2332 // seems odd. | |
2333 | |
2334 if( is_zombie() || is_not_entrant() ) | |
2335 return; | |
2336 | |
2337 // Make sure all the entry points are correctly aligned for patching. | |
2338 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2339 | |
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2340 // assert(method()->is_oop(), "must be valid"); |
0 | 2341 |
2342 ResourceMark rm; | |
2343 | |
2344 if (!CodeCache::contains(this)) { | |
1490
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2345 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2346 } |
2347 | |
2348 if(is_native_method() ) | |
2349 return; | |
2350 | |
2351 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2352 if (nm != this) { | |
1490
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2353 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2354 this)); |
0 | 2355 } |
2356 | |
2357 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2358 if (! p->verify(this)) { | |
2359 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2360 } | |
2361 } | |
2362 | |
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2363 VerifyOopsClosure voc(this); |
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2364 oops_do(&voc); |
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2365 assert(voc.ok(), "embedded oops must be OK"); |
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2366 verify_scavenge_root_oops(); |
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2367 |
0 | 2368 verify_scopes(); |
2369 } | |
2370 | |
2371 | |
2372 void nmethod::verify_interrupt_point(address call_site) { | |
2373 // This code does not work in release mode since | |
2374 // owns_lock only is available in debug mode. | |
2375 CompiledIC* ic = NULL; | |
2376 Thread *cur = Thread::current(); | |
2377 if (CompiledIC_lock->owner() == cur || | |
2378 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2379 SafepointSynchronize::is_at_safepoint())) { | |
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2380 ic = CompiledIC_at(this, call_site); |
0 | 2381 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); |
2382 } else { | |
2383 MutexLocker ml_verify (CompiledIC_lock); | |
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2384 ic = CompiledIC_at(this, call_site); |
0 | 2385 } |
2386 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2387 assert(pd != NULL, "PcDesc must exist"); | |
2388 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
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|
2389 pd->obj_decode_offset(), pd->should_reexecute(), |
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2390 pd->return_oop()); |
0 | 2391 !sd->is_top(); sd = sd->sender()) { |
2392 sd->verify(); | |
2393 } | |
2394 } | |
2395 | |
2396 void nmethod::verify_scopes() { | |
2397 if( !method() ) return; // Runtime stubs have no scope | |
2398 if (method()->is_native()) return; // Ignore stub methods. | |
2399 // iterate through all interrupt point | |
2400 // and verify the debug information is valid. | |
2401 RelocIterator iter((nmethod*)this); | |
2402 while (iter.next()) { | |
2403 address stub = NULL; | |
2404 switch (iter.type()) { | |
2405 case relocInfo::virtual_call_type: | |
2406 verify_interrupt_point(iter.addr()); | |
2407 break; | |
2408 case relocInfo::opt_virtual_call_type: | |
2409 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2410 verify_interrupt_point(iter.addr()); | |
2411 break; | |
2412 case relocInfo::static_call_type: | |
2413 stub = iter.static_call_reloc()->static_stub(); | |
2414 //verify_interrupt_point(iter.addr()); | |
2415 break; | |
2416 case relocInfo::runtime_call_type: | |
2417 address destination = iter.reloc()->value(); | |
2418 // Right now there is no way to find out which entries support | |
2419 // an interrupt point. It would be nice if we had this | |
2420 // information in a table. | |
2421 break; | |
2422 } | |
2423 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2424 } | |
2425 } | |
2426 | |
2427 | |
2428 // ----------------------------------------------------------------------------- | |
2429 // Non-product code | |
2430 #ifndef PRODUCT | |
2431 | |
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2432 class DebugScavengeRoot: public OopClosure { |
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2433 nmethod* _nm; |
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|
2434 bool _ok; |
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|
2435 public: |
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|
2436 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2437 bool ok() { return _ok; } |
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2438 virtual void do_oop(oop* p) { |
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|
2439 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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|
2440 if (_ok) { |
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2441 _nm->print_nmethod(true); |
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|
2442 _ok = false; |
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|
2443 } |
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2444 tty->print_cr("*** scavengable oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2445 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2446 (*p)->print(); |
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|
2447 } |
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|
2448 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2449 }; |
0 | 2450 |
989
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2451 void nmethod::verify_scavenge_root_oops() { |
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2452 if (!on_scavenge_root_list()) { |
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|
2453 // Actually look inside, to verify the claim that it's clean. |
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|
2454 DebugScavengeRoot debug_scavenge_root(this); |
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|
2455 oops_do(&debug_scavenge_root); |
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|
2456 if (!debug_scavenge_root.ok()) |
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2457 fatal("found an unadvertised bad scavengable oop in the code cache"); |
0 | 2458 } |
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2459 assert(scavenge_root_not_marked(), ""); |
0 | 2460 } |
2461 | |
100
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|
2462 #endif // PRODUCT |
0 | 2463 |
2464 // Printing operations | |
2465 | |
2466 void nmethod::print() const { | |
2467 ResourceMark rm; | |
2468 ttyLocker ttyl; // keep the following output all in one block | |
2469 | |
2405
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|
2470 tty->print("Compiled method "); |
0 | 2471 |
2472 if (is_compiled_by_c1()) { | |
2473 tty->print("(c1) "); | |
2474 } else if (is_compiled_by_c2()) { | |
2475 tty->print("(c2) "); | |
1692 | 2476 } else if (is_compiled_by_shark()) { |
2477 tty->print("(shark) "); | |
0 | 2478 } else { |
2479 tty->print("(nm) "); | |
2480 } | |
2481 | |
2405
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diff
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|
2482 print_on(tty, NULL); |
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|
2483 |
0 | 2484 if (WizardMode) { |
2485 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2486 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2487 tty->print(" { "); | |
2488 if (is_in_use()) tty->print("in_use "); | |
2489 if (is_not_entrant()) tty->print("not_entrant "); | |
2490 if (is_zombie()) tty->print("zombie "); | |
2491 if (is_unloaded()) tty->print("unloaded "); | |
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|
2492 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2493 tty->print_cr("}:"); |
2494 } | |
2495 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2496 (address)this, | |
2497 (address)this + size(), | |
2498 size()); | |
2499 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2500 relocation_begin(), | |
2501 relocation_end(), | |
2502 relocation_size()); | |
1762
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diff
changeset
|
2503 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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6961697: move nmethod constants section before instruction section
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|
2504 consts_begin(), |
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|
2505 consts_end(), |
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|
2506 consts_size()); |
1748 | 2507 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2508 insts_begin(), | |
2509 insts_end(), | |
2510 insts_size()); | |
0 | 2511 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2512 stub_begin(), | |
2513 stub_end(), | |
2514 stub_size()); | |
1563
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6951083: oops and relocations should part of nmethod not CodeBlob
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diff
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|
2515 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2516 oops_begin(), |
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|
2517 oops_end(), |
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|
2518 oops_size()); |
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2519 if (metadata_size () > 0) tty->print_cr(" metadata [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2520 metadata_begin(), |
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|
2521 metadata_end(), |
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|
2522 metadata_size()); |
0 | 2523 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2524 scopes_data_begin(), | |
2525 scopes_data_end(), | |
2526 scopes_data_size()); | |
2527 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2528 scopes_pcs_begin(), | |
2529 scopes_pcs_end(), | |
2530 scopes_pcs_size()); | |
2531 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2532 dependencies_begin(), | |
2533 dependencies_end(), | |
2534 dependencies_size()); | |
2535 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2536 handler_table_begin(), | |
2537 handler_table_end(), | |
2538 handler_table_size()); | |
2539 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2540 nul_chk_table_begin(), | |
2541 nul_chk_table_end(), | |
2542 nul_chk_table_size()); | |
2543 } | |
2544 | |
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|
2545 void nmethod::print_code() { |
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diff
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|
2546 HandleMark hm; |
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diff
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|
2547 ResourceMark m; |
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diff
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|
2548 Disassembler::decode(this); |
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diff
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|
2549 } |
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|
2550 |
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|
2551 |
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|
2552 #ifndef PRODUCT |
0 | 2553 |
2554 void nmethod::print_scopes() { | |
2555 // Find the first pc desc for all scopes in the code and print it. | |
2556 ResourceMark rm; | |
2557 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2558 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2559 continue; | |
2560 | |
2561 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2562 sd->print_on(tty, p); | |
2563 } | |
2564 } | |
2565 | |
2566 void nmethod::print_dependencies() { | |
2567 ResourceMark rm; | |
2568 ttyLocker ttyl; // keep the following output all in one block | |
2569 tty->print_cr("Dependencies:"); | |
2570 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2571 deps.print_dependency(); | |
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2572 Klass* ctxk = deps.context_type(); |
0 | 2573 if (ctxk != NULL) { |
2574 Klass* k = Klass::cast(ctxk); | |
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2575 if (k->oop_is_instance() && ((InstanceKlass*)k)->is_dependent_nmethod(this)) { |
30 | 2576 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2577 } |
2578 } | |
2579 deps.log_dependency(); // put it into the xml log also | |
2580 } | |
2581 } | |
2582 | |
2583 | |
2584 void nmethod::print_relocations() { | |
2585 ResourceMark m; // in case methods get printed via the debugger | |
2586 tty->print_cr("relocations:"); | |
2587 RelocIterator iter(this); | |
2588 iter.print(); | |
2589 if (UseRelocIndex) { | |
2590 jint* index_end = (jint*)relocation_end() - 1; | |
2591 jint index_size = *index_end; | |
2592 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2593 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2594 if (index_size > 0) { | |
2595 jint* ip; | |
2596 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2597 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2598 ip[0], | |
2599 ip[1], | |
2600 header_end()+ip[0], | |
2601 relocation_begin()-1+ip[1]); | |
2602 for (; ip < index_end; ip++) | |
2603 tty->print_cr(" (%d ?)", ip[0]); | |
2604 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2605 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2606 } | |
2607 } | |
2608 } | |
2609 | |
2610 | |
2611 void nmethod::print_pcs() { | |
2612 ResourceMark m; // in case methods get printed via debugger | |
2613 tty->print_cr("pc-bytecode offsets:"); | |
2614 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2615 p->print(this); | |
2616 } | |
2617 } | |
2618 | |
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2619 #endif // PRODUCT |
0 | 2620 |
2621 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2622 RelocIterator iter(this, begin, end); | |
2623 bool have_one = false; | |
2624 while (iter.next()) { | |
2625 have_one = true; | |
2626 switch (iter.type()) { | |
2627 case relocInfo::none: return "no_reloc"; | |
2628 case relocInfo::oop_type: { | |
2629 stringStream st; | |
2630 oop_Relocation* r = iter.oop_reloc(); | |
2631 oop obj = r->oop_value(); | |
2632 st.print("oop("); | |
2633 if (obj == NULL) st.print("NULL"); | |
2634 else obj->print_value_on(&st); | |
2635 st.print(")"); | |
2636 return st.as_string(); | |
2637 } | |
6725
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2638 case relocInfo::metadata_type: { |
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|
2639 stringStream st; |
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|
2640 metadata_Relocation* r = iter.metadata_reloc(); |
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|
2641 Metadata* obj = r->metadata_value(); |
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diff
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|
2642 st.print("metadata("); |
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|
2643 if (obj == NULL) st.print("NULL"); |
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|
2644 else obj->print_value_on(&st); |
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diff
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|
2645 st.print(")"); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2646 return st.as_string(); |
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|
2647 } |
0 | 2648 case relocInfo::virtual_call_type: return "virtual_call"; |
2649 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2650 case relocInfo::static_call_type: return "static_call"; | |
2651 case relocInfo::static_stub_type: return "static_stub"; | |
2652 case relocInfo::runtime_call_type: return "runtime_call"; | |
2653 case relocInfo::external_word_type: return "external_word"; | |
2654 case relocInfo::internal_word_type: return "internal_word"; | |
2655 case relocInfo::section_word_type: return "section_word"; | |
2656 case relocInfo::poll_type: return "poll"; | |
2657 case relocInfo::poll_return_type: return "poll_return"; | |
2658 case relocInfo::type_mask: return "type_bit_mask"; | |
2659 } | |
2660 } | |
2661 return have_one ? "other" : NULL; | |
2662 } | |
2663 | |
2664 // Return a the last scope in (begin..end] | |
2665 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2666 PcDesc* p = pc_desc_near(begin+1); | |
2667 if (p != NULL && p->real_pc(this) <= end) { | |
2668 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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1250
diff
changeset
|
2669 p->obj_decode_offset(), p->should_reexecute(), |
f70b0d9ab095
6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
kvn
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1250
diff
changeset
|
2670 p->return_oop()); |
0 | 2671 } |
2672 return NULL; | |
2673 } | |
2674 | |
6796
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7200163: add CodeComments functionality to assember stubs
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6792
diff
changeset
|
2675 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) const { |
1155
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|
2676 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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diff
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|
2677 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2678 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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diff
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|
2679 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2680 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2681 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
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|
2682 if (has_method_handle_invokes()) |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2683 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2684 |
1155
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diff
changeset
|
2685 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
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diff
changeset
|
2686 |
1155
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diff
changeset
|
2687 if (block_begin == entry_point()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2688 methodHandle m = method(); |
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diff
changeset
|
2689 if (m.not_null()) { |
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diff
changeset
|
2690 stream->print(" # "); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2691 m->print_value_on(stream); |
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diff
changeset
|
2692 stream->cr(); |
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|
2693 } |
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|
2694 if (m.not_null() && !is_osr_method()) { |
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diff
changeset
|
2695 ResourceMark rm; |
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changeset
|
2696 int sizeargs = m->size_of_parameters(); |
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changeset
|
2697 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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changeset
|
2698 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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changeset
|
2699 { |
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diff
changeset
|
2700 int sig_index = 0; |
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changeset
|
2701 if (!m->is_static()) |
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|
2702 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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diff
changeset
|
2703 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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diff
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|
2704 BasicType t = ss.type(); |
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|
2705 sig_bt[sig_index++] = t; |
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|
2706 if (type2size[t] == 2) { |
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diff
changeset
|
2707 sig_bt[sig_index++] = T_VOID; |
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|
2708 } else { |
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changeset
|
2709 assert(type2size[t] == 1, "size is 1 or 2"); |
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|
2710 } |
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|
2711 } |
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|
2712 assert(sig_index == sizeargs, ""); |
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|
2713 } |
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|
2714 const char* spname = "sp"; // make arch-specific? |
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|
2715 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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|
2716 int stack_slot_offset = this->frame_size() * wordSize; |
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|
2717 int tab1 = 14, tab2 = 24; |
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diff
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|
2718 int sig_index = 0; |
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|
2719 int arg_index = (m->is_static() ? 0 : -1); |
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|
2720 bool did_old_sp = false; |
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|
2721 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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|
2722 bool at_this = (arg_index == -1); |
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|
2723 bool at_old_sp = false; |
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|
2724 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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|
2725 assert(t == sig_bt[sig_index], "sigs in sync"); |
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diff
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|
2726 if (at_this) |
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|
2727 stream->print(" # this: "); |
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changeset
|
2728 else |
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|
2729 stream->print(" # parm%d: ", arg_index); |
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diff
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|
2730 stream->move_to(tab1); |
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|
2731 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2732 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2733 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2734 stream->print("%s", fst->name()); |
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diff
changeset
|
2735 if (snd->is_valid()) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
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|
2736 stream->print(":%s", snd->name()); |
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diff
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|
2737 } |
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diff
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|
2738 } else if (fst->is_stack()) { |
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diff
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|
2739 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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diff
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2740 if (offset == stack_slot_offset) at_old_sp = true; |
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diff
changeset
|
2741 stream->print("[%s+0x%x]", spname, offset); |
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diff
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|
2742 } else { |
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diff
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|
2743 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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diff
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|
2744 } |
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diff
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|
2745 stream->print(" "); |
4e6abf09f540
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diff
changeset
|
2746 stream->move_to(tab2); |
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diff
changeset
|
2747 stream->print("= "); |
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diff
changeset
|
2748 if (at_this) { |
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changeset
|
2749 m->method_holder()->print_value_on(stream); |
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|
2750 } else { |
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diff
changeset
|
2751 bool did_name = false; |
4e6abf09f540
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diff
changeset
|
2752 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2142
diff
changeset
|
2753 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
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diff
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|
2754 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2755 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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diff
changeset
|
2756 did_name = true; |
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diff
changeset
|
2757 } |
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diff
changeset
|
2758 } |
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diff
changeset
|
2759 if (!did_name) |
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diff
changeset
|
2760 stream->print("%s", type2name(t)); |
4e6abf09f540
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diff
changeset
|
2761 } |
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diff
changeset
|
2762 if (at_old_sp) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2763 stream->print(" (%s of caller)", spname); |
4e6abf09f540
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diff
changeset
|
2764 did_old_sp = true; |
4e6abf09f540
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diff
changeset
|
2765 } |
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diff
changeset
|
2766 stream->cr(); |
4e6abf09f540
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diff
changeset
|
2767 sig_index += type2size[t]; |
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jrose
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diff
changeset
|
2768 arg_index += 1; |
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diff
changeset
|
2769 if (!at_this) ss.next(); |
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diff
changeset
|
2770 } |
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diff
changeset
|
2771 if (!did_old_sp) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2772 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2773 stream->move_to(tab1); |
4e6abf09f540
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diff
changeset
|
2774 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
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diff
changeset
|
2775 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2776 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2777 } |
4e6abf09f540
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diff
changeset
|
2778 } |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2779 } |
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diff
changeset
|
2780 } |
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diff
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|
2781 |
0 | 2782 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2783 // First, find an oopmap in (begin, end]. | |
2784 // We use the odd half-closed interval so that oop maps and scope descs | |
2785 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2786 address base = code_begin(); |
0 | 2787 OopMapSet* oms = oop_maps(); |
2788 if (oms != NULL) { | |
2789 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2790 OopMap* om = oms->at(i); | |
2791 address pc = base + om->offset(); | |
2792 if (pc > begin) { | |
2793 if (pc <= end) { | |
100
c7c777385a15
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30
diff
changeset
|
2794 st->move_to(column); |
c7c777385a15
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30
diff
changeset
|
2795 st->print("; "); |
c7c777385a15
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parents:
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diff
changeset
|
2796 om->print_on(st); |
0 | 2797 } |
2798 break; | |
2799 } | |
2800 } | |
2801 } | |
100
c7c777385a15
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30
diff
changeset
|
2802 |
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diff
changeset
|
2803 // Print any debug info present at this pc. |
0 | 2804 ScopeDesc* sd = scope_desc_in(begin, end); |
2805 if (sd != NULL) { | |
100
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diff
changeset
|
2806 st->move_to(column); |
0 | 2807 if (sd->bci() == SynchronizationEntryBCI) { |
2808 st->print(";*synchronization entry"); | |
2809 } else { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6266
diff
changeset
|
2810 if (sd->method() == NULL) { |
100
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diff
changeset
|
2811 st->print("method is NULL"); |
0 | 2812 } else if (sd->method()->is_native()) { |
100
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diff
changeset
|
2813 st->print("method is native"); |
0 | 2814 } else { |
2142 | 2815 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2816 st->print(";*%s", Bytecodes::name(bc)); |
2817 switch (bc) { | |
2818 case Bytecodes::_invokevirtual: | |
2819 case Bytecodes::_invokespecial: | |
2820 case Bytecodes::_invokestatic: | |
2821 case Bytecodes::_invokeinterface: | |
2822 { | |
2142 | 2823 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2824 st->print(" "); |
2142 | 2825 if (invoke.name() != NULL) |
2826 invoke.name()->print_symbol_on(st); | |
0 | 2827 else |
2828 st->print("<UNKNOWN>"); | |
2829 break; | |
2830 } | |
2831 case Bytecodes::_getfield: | |
2832 case Bytecodes::_putfield: | |
2833 case Bytecodes::_getstatic: | |
2834 case Bytecodes::_putstatic: | |
2835 { | |
2142 | 2836 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2837 st->print(" "); |
2142 | 2838 if (field.name() != NULL) |
2839 field.name()->print_symbol_on(st); | |
0 | 2840 else |
2841 st->print("<UNKNOWN>"); | |
2842 } | |
2843 } | |
2844 } | |
2845 } | |
100
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diff
changeset
|
2846 |
0 | 2847 // Print all scopes |
2848 for (;sd != NULL; sd = sd->sender()) { | |
100
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diff
changeset
|
2849 st->move_to(column); |
0 | 2850 st->print("; -"); |
6725
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diff
changeset
|
2851 if (sd->method() == NULL) { |
100
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diff
changeset
|
2852 st->print("method is NULL"); |
0 | 2853 } else { |
2854 sd->method()->print_short_name(st); | |
2855 } | |
2856 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2857 if (lineno != -1) { | |
2858 st->print("@%d (line %d)", sd->bci(), lineno); | |
2859 } else { | |
2860 st->print("@%d", sd->bci()); | |
2861 } | |
2862 st->cr(); | |
2863 } | |
2864 } | |
2865 | |
2866 // Print relocation information | |
2867 const char* str = reloc_string_for(begin, end); | |
2868 if (str != NULL) { | |
2869 if (sd != NULL) st->cr(); | |
100
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30
diff
changeset
|
2870 st->move_to(column); |
0 | 2871 st->print("; {%s}", str); |
2872 } | |
1748 | 2873 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2874 if (cont_offset != 0) { |
100
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diff
changeset
|
2875 st->move_to(column); |
1748 | 2876 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2877 } |
2878 | |
2879 } | |
2880 | |
100
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diff
changeset
|
2881 #ifndef PRODUCT |
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diff
changeset
|
2882 |
0 | 2883 void nmethod::print_value_on(outputStream* st) const { |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
parents:
2376
diff
changeset
|
2884 st->print("nmethod"); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2376
diff
changeset
|
2885 print_on(st, NULL); |
0 | 2886 } |
2887 | |
2888 void nmethod::print_calls(outputStream* st) { | |
2889 RelocIterator iter(this); | |
2890 while (iter.next()) { | |
2891 switch (iter.type()) { | |
2892 case relocInfo::virtual_call_type: | |
2893 case relocInfo::opt_virtual_call_type: { | |
2894 VerifyMutexLocker mc(CompiledIC_lock); | |
2895 CompiledIC_at(iter.reloc())->print(); | |
2896 break; | |
2897 } | |
2898 case relocInfo::static_call_type: | |
2899 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2900 compiledStaticCall_at(iter.reloc())->print(); | |
2901 break; | |
2902 } | |
2903 } | |
2904 } | |
2905 | |
2906 void nmethod::print_handler_table() { | |
2907 ExceptionHandlerTable(this).print(); | |
2908 } | |
2909 | |
2910 void nmethod::print_nul_chk_table() { | |
1748 | 2911 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2912 } |
2913 | |
2914 void nmethod::print_statistics() { | |
2915 ttyLocker ttyl; | |
2916 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2917 nmethod_stats.print_native_nmethod_stats(); | |
2918 nmethod_stats.print_nmethod_stats(); | |
2919 DebugInformationRecorder::print_statistics(); | |
2920 nmethod_stats.print_pc_stats(); | |
2921 Dependencies::print_statistics(); | |
2922 if (xtty != NULL) xtty->tail("statistics"); | |
2923 } | |
2924 | |
2925 #endif // PRODUCT |