Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.cpp @ 3202:9352a9c26095
revert outer framesate scheduling change
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Fri, 08 Jul 2011 18:00:39 +0200 |
parents | 5857923e563c |
children | be4ca325525a |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "compiler/abstractCompiler.hpp" | |
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31 #include "compiler/compileBroker.hpp" |
1972 | 32 #include "compiler/compileLog.hpp" |
33 #include "compiler/compilerOracle.hpp" | |
34 #include "compiler/disassembler.hpp" | |
35 #include "interpreter/bytecode.hpp" | |
36 #include "oops/methodDataOop.hpp" | |
37 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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38 #include "prims/jvmtiImpl.hpp" |
1972 | 39 #include "runtime/sharedRuntime.hpp" |
40 #include "runtime/sweeper.hpp" | |
41 #include "utilities/dtrace.hpp" | |
42 #include "utilities/events.hpp" | |
43 #include "utilities/xmlstream.hpp" | |
44 #ifdef SHARK | |
45 #include "shark/sharkCompiler.hpp" | |
46 #endif | |
0 | 47 |
48 #ifdef DTRACE_ENABLED | |
49 | |
50 // Only bother with this argument setup if dtrace is available | |
51 | |
52 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
53 const char*, int, const char*, int, const char*, int, void*, size_t); | |
54 | |
55 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
56 char*, int, char*, int, char*, int); | |
57 | |
58 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
59 { \ | |
60 methodOop m = (method); \ | |
61 if (m != NULL) { \ | |
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62 Symbol* klass_name = m->klass_name(); \ |
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63 Symbol* name = m->name(); \ |
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64 Symbol* signature = m->signature(); \ |
0 | 65 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
66 klass_name->bytes(), klass_name->utf8_length(), \ | |
67 name->bytes(), name->utf8_length(), \ | |
68 signature->bytes(), signature->utf8_length()); \ | |
69 } \ | |
70 } | |
71 | |
72 #else // ndef DTRACE_ENABLED | |
73 | |
74 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
75 | |
76 #endif | |
77 | |
78 bool nmethod::is_compiled_by_c1() const { | |
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79 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 80 if (is_native_method()) return false; |
81 return compiler()->is_c1(); | |
82 } | |
83 bool nmethod::is_compiled_by_c2() const { | |
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84 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 85 if (is_native_method()) return false; |
86 return compiler()->is_c2(); | |
87 } | |
1692 | 88 bool nmethod::is_compiled_by_shark() const { |
89 if (is_native_method()) return false; | |
90 assert(compiler() != NULL, "must be"); | |
91 return compiler()->is_shark(); | |
92 } | |
0 | 93 |
94 | |
95 | |
96 //--------------------------------------------------------------------------------- | |
97 // NMethod statistics | |
98 // They are printed under various flags, including: | |
99 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
100 // (In the latter two cases, they like other stats are printed to the log only.) | |
101 | |
102 #ifndef PRODUCT | |
103 // These variables are put into one block to reduce relocations | |
104 // and make it simpler to print from the debugger. | |
105 static | |
106 struct nmethod_stats_struct { | |
107 int nmethod_count; | |
108 int total_size; | |
109 int relocation_size; | |
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110 int consts_size; |
1748 | 111 int insts_size; |
0 | 112 int stub_size; |
113 int scopes_data_size; | |
114 int scopes_pcs_size; | |
115 int dependencies_size; | |
116 int handler_table_size; | |
117 int nul_chk_table_size; | |
118 int oops_size; | |
119 | |
120 void note_nmethod(nmethod* nm) { | |
121 nmethod_count += 1; | |
122 total_size += nm->size(); | |
123 relocation_size += nm->relocation_size(); | |
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124 consts_size += nm->consts_size(); |
1748 | 125 insts_size += nm->insts_size(); |
0 | 126 stub_size += nm->stub_size(); |
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127 oops_size += nm->oops_size(); |
0 | 128 scopes_data_size += nm->scopes_data_size(); |
129 scopes_pcs_size += nm->scopes_pcs_size(); | |
130 dependencies_size += nm->dependencies_size(); | |
131 handler_table_size += nm->handler_table_size(); | |
132 nul_chk_table_size += nm->nul_chk_table_size(); | |
133 } | |
134 void print_nmethod_stats() { | |
135 if (nmethod_count == 0) return; | |
136 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
137 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
138 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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139 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 140 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 141 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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142 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 143 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
144 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
145 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
146 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
147 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
148 } | |
149 | |
150 int native_nmethod_count; | |
151 int native_total_size; | |
152 int native_relocation_size; | |
1748 | 153 int native_insts_size; |
0 | 154 int native_oops_size; |
155 void note_native_nmethod(nmethod* nm) { | |
156 native_nmethod_count += 1; | |
157 native_total_size += nm->size(); | |
158 native_relocation_size += nm->relocation_size(); | |
1748 | 159 native_insts_size += nm->insts_size(); |
0 | 160 native_oops_size += nm->oops_size(); |
161 } | |
162 void print_native_nmethod_stats() { | |
163 if (native_nmethod_count == 0) return; | |
164 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
165 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
166 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 167 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 168 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
169 } | |
170 | |
171 int pc_desc_resets; // number of resets (= number of caches) | |
172 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
173 int pc_desc_approx; // number of those which have approximate true | |
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174 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 175 int pc_desc_hits; // number of LRU cache hits |
176 int pc_desc_tests; // total number of PcDesc examinations | |
177 int pc_desc_searches; // total number of quasi-binary search steps | |
178 int pc_desc_adds; // number of LUR cache insertions | |
179 | |
180 void print_pc_stats() { | |
181 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
182 pc_desc_queries, | |
183 (double)(pc_desc_tests + pc_desc_searches) | |
184 / pc_desc_queries); | |
185 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
186 pc_desc_resets, | |
187 pc_desc_queries, pc_desc_approx, | |
188 pc_desc_repeats, pc_desc_hits, | |
189 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
190 } | |
191 } nmethod_stats; | |
192 #endif //PRODUCT | |
193 | |
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194 |
0 | 195 //--------------------------------------------------------------------------------- |
196 | |
197 | |
198 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
199 assert(pc != NULL, "Must be non null"); | |
200 assert(exception.not_null(), "Must be non null"); | |
201 assert(handler != NULL, "Must be non null"); | |
202 | |
203 _count = 0; | |
204 _exception_type = exception->klass(); | |
205 _next = NULL; | |
206 | |
207 add_address_and_handler(pc,handler); | |
208 } | |
209 | |
210 | |
211 address ExceptionCache::match(Handle exception, address pc) { | |
212 assert(pc != NULL,"Must be non null"); | |
213 assert(exception.not_null(),"Must be non null"); | |
214 if (exception->klass() == exception_type()) { | |
215 return (test_address(pc)); | |
216 } | |
217 | |
218 return NULL; | |
219 } | |
220 | |
221 | |
222 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
223 assert(exception.not_null(),"Must be non null"); | |
224 if (exception->klass() == exception_type() && count() < cache_size) { | |
225 return true; | |
226 } | |
227 return false; | |
228 } | |
229 | |
230 | |
231 address ExceptionCache::test_address(address addr) { | |
232 for (int i=0; i<count(); i++) { | |
233 if (pc_at(i) == addr) { | |
234 return handler_at(i); | |
235 } | |
236 } | |
237 return NULL; | |
238 } | |
239 | |
240 | |
241 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
242 if (test_address(addr) == handler) return true; | |
243 if (count() < cache_size) { | |
244 set_pc_at(count(),addr); | |
245 set_handler_at(count(), handler); | |
246 increment_count(); | |
247 return true; | |
248 } | |
249 return false; | |
250 } | |
251 | |
252 | |
253 // private method for handling exception cache | |
254 // These methods are private, and used to manipulate the exception cache | |
255 // directly. | |
256 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
257 ExceptionCache* ec = exception_cache(); | |
258 while (ec != NULL) { | |
259 if (ec->match_exception_with_space(exception)) { | |
260 return ec; | |
261 } | |
262 ec = ec->next(); | |
263 } | |
264 return NULL; | |
265 } | |
266 | |
267 | |
268 //----------------------------------------------------------------------------- | |
269 | |
270 | |
271 // Helper used by both find_pc_desc methods. | |
272 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
273 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
274 if (!approximate) | |
275 return pc->pc_offset() == pc_offset; | |
276 else | |
277 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
278 } | |
279 | |
280 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
281 if (initial_pc_desc == NULL) { | |
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282 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 283 return; |
284 } | |
285 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
286 // reset the cache by filling it with benign (non-null) values | |
287 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
288 for (int i = 0; i < cache_size; i++) | |
289 _pc_descs[i] = initial_pc_desc; | |
290 } | |
291 | |
292 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
293 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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294 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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295 |
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296 // Note: one might think that caching the most recently |
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297 // read value separately would be a win, but one would be |
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298 // wrong. When many threads are updating it, the cache |
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299 // line it's in would bounce between caches, negating |
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300 // any benefit. |
0 | 301 |
302 // In order to prevent race conditions do not load cache elements | |
303 // repeatedly, but use a local copy: | |
304 PcDesc* res; | |
305 | |
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306 // Step one: Check the most recently added value. |
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307 res = _pc_descs[0]; |
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308 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 309 if (match_desc(res, pc_offset, approximate)) { |
310 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
311 return res; | |
312 } | |
313 | |
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314 // Step two: Check the rest of the LRU cache. |
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315 for (int i = 1; i < cache_size; ++i) { |
0 | 316 res = _pc_descs[i]; |
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317 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 318 if (match_desc(res, pc_offset, approximate)) { |
319 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
320 return res; | |
321 } | |
322 } | |
323 | |
324 // Report failure. | |
325 return NULL; | |
326 } | |
327 | |
328 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
329 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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330 // Update the LRU cache by shifting pc_desc forward. |
0 | 331 for (int i = 0; i < cache_size; i++) { |
332 PcDesc* next = _pc_descs[i]; | |
333 _pc_descs[i] = pc_desc; | |
334 pc_desc = next; | |
335 } | |
336 } | |
337 | |
338 // adjust pcs_size so that it is a multiple of both oopSize and | |
339 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
340 // of oopSize, then 2*sizeof(PcDesc) is) | |
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341 static int adjust_pcs_size(int pcs_size) { |
0 | 342 int nsize = round_to(pcs_size, oopSize); |
343 if ((nsize % sizeof(PcDesc)) != 0) { | |
344 nsize = pcs_size + sizeof(PcDesc); | |
345 } | |
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346 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 347 return nsize; |
348 } | |
349 | |
350 //----------------------------------------------------------------------------- | |
351 | |
352 | |
353 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
354 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
355 assert(new_entry != NULL,"Must be non null"); | |
356 assert(new_entry->next() == NULL, "Must be null"); | |
357 | |
358 if (exception_cache() != NULL) { | |
359 new_entry->set_next(exception_cache()); | |
360 } | |
361 set_exception_cache(new_entry); | |
362 } | |
363 | |
364 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
365 ExceptionCache* prev = NULL; | |
366 ExceptionCache* curr = exception_cache(); | |
367 assert(curr != NULL, "nothing to remove"); | |
368 // find the previous and next entry of ec | |
369 while (curr != ec) { | |
370 prev = curr; | |
371 curr = curr->next(); | |
372 assert(curr != NULL, "ExceptionCache not found"); | |
373 } | |
374 // now: curr == ec | |
375 ExceptionCache* next = curr->next(); | |
376 if (prev == NULL) { | |
377 set_exception_cache(next); | |
378 } else { | |
379 prev->set_next(next); | |
380 } | |
381 delete curr; | |
382 } | |
383 | |
384 | |
385 // public method for accessing the exception cache | |
386 // These are the public access methods. | |
387 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
388 // We never grab a lock to read the exception cache, so we may | |
389 // have false negatives. This is okay, as it can only happen during | |
390 // the first few exception lookups for a given nmethod. | |
391 ExceptionCache* ec = exception_cache(); | |
392 while (ec != NULL) { | |
393 address ret_val; | |
394 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
395 return ret_val; | |
396 } | |
397 ec = ec->next(); | |
398 } | |
399 return NULL; | |
400 } | |
401 | |
402 | |
403 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
404 // There are potential race conditions during exception cache updates, so we | |
405 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 406 // we don't lock during reads, it is possible to have several threads attempt |
0 | 407 // to update the cache with the same data. We need to check for already inserted |
408 // copies of the current data before adding it. | |
409 | |
410 MutexLocker ml(ExceptionCache_lock); | |
411 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
412 | |
413 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
414 target_entry = new ExceptionCache(exception,pc,handler); | |
415 add_exception_cache_entry(target_entry); | |
416 } | |
417 } | |
418 | |
419 | |
420 //-------------end of code for ExceptionCache-------------- | |
421 | |
422 | |
423 int nmethod::total_size() const { | |
424 return | |
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425 consts_size() + |
1748 | 426 insts_size() + |
0 | 427 stub_size() + |
428 scopes_data_size() + | |
429 scopes_pcs_size() + | |
430 handler_table_size() + | |
431 nul_chk_table_size(); | |
432 } | |
433 | |
434 const char* nmethod::compile_kind() const { | |
435 if (is_osr_method()) return "osr"; | |
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436 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 437 return NULL; |
438 } | |
439 | |
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440 // Fill in default values for various flag fields |
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441 void nmethod::init_defaults() { |
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442 _state = alive; |
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443 _marked_for_reclamation = 0; |
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444 _has_flushed_dependencies = 0; |
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445 _speculatively_disconnected = 0; |
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446 _has_unsafe_access = 0; |
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447 _has_method_handle_invokes = 0; |
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448 _marked_for_deoptimization = 0; |
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449 _lock_count = 0; |
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450 _stack_traversal_mark = 0; |
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451 _unload_reported = false; // jvmti state |
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452 |
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453 NOT_PRODUCT(_has_debug_info = false); |
1726 | 454 #ifdef ASSERT |
455 _oops_are_stale = false; | |
456 #endif | |
457 | |
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458 _oops_do_mark_link = NULL; |
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459 _jmethod_id = NULL; |
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460 _osr_link = NULL; |
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461 _scavenge_root_link = NULL; |
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462 _scavenge_root_state = 0; |
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463 _saved_nmethod_link = NULL; |
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464 _compiler = NULL; |
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465 |
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466 #ifdef HAVE_DTRACE_H |
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467 _trap_offset = 0; |
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468 #endif // def HAVE_DTRACE_H |
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469 } |
0 | 470 |
471 | |
472 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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473 int compile_id, |
0 | 474 CodeBuffer *code_buffer, |
475 int vep_offset, | |
476 int frame_complete, | |
477 int frame_size, | |
478 ByteSize basic_lock_owner_sp_offset, | |
479 ByteSize basic_lock_sp_offset, | |
480 OopMapSet* oop_maps) { | |
481 // create nmethod | |
482 nmethod* nm = NULL; | |
483 { | |
484 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
485 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
486 CodeOffsets offsets; | |
487 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
488 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
489 nm = new (native_nmethod_size) | |
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490 nmethod(method(), native_nmethod_size, compile_id, &offsets, |
0 | 491 code_buffer, frame_size, |
492 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
493 oop_maps); | |
494 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
495 if (PrintAssembly && nm != NULL) | |
496 Disassembler::decode(nm); | |
497 } | |
498 // verify nmethod | |
499 debug_only(if (nm) nm->verify();) // might block | |
500 | |
501 if (nm != NULL) { | |
502 nm->log_new_nmethod(); | |
503 } | |
504 | |
505 return nm; | |
506 } | |
507 | |
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508 #ifdef HAVE_DTRACE_H |
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509 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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510 CodeBuffer *code_buffer, |
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511 int vep_offset, |
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512 int trap_offset, |
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513 int frame_complete, |
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514 int frame_size) { |
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515 // create nmethod |
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516 nmethod* nm = NULL; |
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517 { |
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518 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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519 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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520 CodeOffsets offsets; |
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521 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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522 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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523 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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524 |
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525 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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526 |
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527 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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528 if (PrintAssembly && nm != NULL) |
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529 Disassembler::decode(nm); |
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530 } |
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531 // verify nmethod |
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532 debug_only(if (nm) nm->verify();) // might block |
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533 |
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534 if (nm != NULL) { |
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535 nm->log_new_nmethod(); |
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536 } |
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537 |
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538 return nm; |
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539 } |
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540 |
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541 #endif // def HAVE_DTRACE_H |
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542 |
0 | 543 nmethod* nmethod::new_nmethod(methodHandle method, |
544 int compile_id, | |
545 int entry_bci, | |
546 CodeOffsets* offsets, | |
547 int orig_pc_offset, | |
548 DebugInformationRecorder* debug_info, | |
549 Dependencies* dependencies, | |
550 CodeBuffer* code_buffer, int frame_size, | |
551 OopMapSet* oop_maps, | |
552 ExceptionHandlerTable* handler_table, | |
553 ImplicitExceptionTable* nul_chk_table, | |
554 AbstractCompiler* compiler, | |
555 int comp_level | |
556 ) | |
557 { | |
558 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
559 // create nmethod | |
560 nmethod* nm = NULL; | |
561 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
562 int nmethod_size = | |
563 allocation_size(code_buffer, sizeof(nmethod)) | |
564 + adjust_pcs_size(debug_info->pcs_size()) | |
565 + round_to(dependencies->size_in_bytes() , oopSize) | |
566 + round_to(handler_table->size_in_bytes(), oopSize) | |
567 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
568 + round_to(debug_info->data_size() , oopSize); | |
569 nm = new (nmethod_size) | |
570 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
571 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
572 oop_maps, | |
573 handler_table, | |
574 nul_chk_table, | |
575 compiler, | |
576 comp_level); | |
577 if (nm != NULL) { | |
578 // To make dependency checking during class loading fast, record | |
579 // the nmethod dependencies in the classes it is dependent on. | |
580 // This allows the dependency checking code to simply walk the | |
581 // class hierarchy above the loaded class, checking only nmethods | |
582 // which are dependent on those classes. The slow way is to | |
583 // check every nmethod for dependencies which makes it linear in | |
584 // the number of methods compiled. For applications with a lot | |
585 // classes the slow way is too slow. | |
586 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
587 klassOop klass = deps.context_type(); | |
588 if (klass == NULL) continue; // ignore things like evol_method | |
589 | |
590 // record this nmethod as dependent on this klass | |
591 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
592 } | |
593 } | |
594 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
595 if (PrintAssembly && nm != NULL) | |
596 Disassembler::decode(nm); | |
597 } | |
598 | |
599 // verify nmethod | |
600 debug_only(if (nm) nm->verify();) // might block | |
601 | |
602 if (nm != NULL) { | |
603 nm->log_new_nmethod(); | |
604 } | |
605 | |
606 // done | |
607 return nm; | |
608 } | |
609 | |
610 | |
611 // For native wrappers | |
612 nmethod::nmethod( | |
613 methodOop method, | |
614 int nmethod_size, | |
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615 int compile_id, |
0 | 616 CodeOffsets* offsets, |
617 CodeBuffer* code_buffer, | |
618 int frame_size, | |
619 ByteSize basic_lock_owner_sp_offset, | |
620 ByteSize basic_lock_sp_offset, | |
621 OopMapSet* oop_maps ) | |
622 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
623 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 624 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
625 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 626 { |
627 { | |
628 debug_only(No_Safepoint_Verifier nsv;) | |
629 assert_locked_or_safepoint(CodeCache_lock); | |
630 | |
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631 init_defaults(); |
0 | 632 _method = method; |
633 _entry_bci = InvocationEntryBci; | |
634 // We have no exception handler or deopt handler make the | |
635 // values something that will never match a pc like the nmethod vtable entry | |
636 _exception_offset = 0; | |
637 _deoptimize_offset = 0; | |
1204 | 638 _deoptimize_mh_offset = 0; |
0 | 639 _orig_pc_offset = 0; |
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640 |
1748 | 641 _consts_offset = data_offset(); |
0 | 642 _stub_offset = data_offset(); |
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643 _oops_offset = data_offset(); |
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644 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 645 _scopes_pcs_offset = _scopes_data_offset; |
646 _dependencies_offset = _scopes_pcs_offset; | |
647 _handler_table_offset = _dependencies_offset; | |
648 _nul_chk_table_offset = _handler_table_offset; | |
649 _nmethod_end_offset = _nul_chk_table_offset; | |
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650 _compile_id = compile_id; |
0 | 651 _comp_level = CompLevel_none; |
1748 | 652 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
653 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 654 _osr_entry_point = NULL; |
655 _exception_cache = NULL; | |
656 _pc_desc_cache.reset_to(NULL); | |
657 | |
658 code_buffer->copy_oops_to(this); | |
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659 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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660 CodeCache::add_scavenge_root_nmethod(this); |
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661 } |
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662 debug_only(verify_scavenge_root_oops()); |
0 | 663 CodeCache::commit(this); |
664 } | |
665 | |
666 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
667 ttyLocker ttyl; // keep the following output all in one block | |
668 // This output goes directly to the tty, not the compiler log. | |
669 // To enable tools to match it up with the compilation activity, | |
670 // be sure to tag this tty output with the compile ID. | |
671 if (xtty != NULL) { | |
672 xtty->begin_head("print_native_nmethod"); | |
673 xtty->method(_method); | |
674 xtty->stamp(); | |
675 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
676 } | |
677 // print the header part first | |
678 print(); | |
679 // then print the requested information | |
680 if (PrintNativeNMethods) { | |
681 print_code(); | |
682 oop_maps->print(); | |
683 } | |
684 if (PrintRelocations) { | |
685 print_relocations(); | |
686 } | |
687 if (xtty != NULL) { | |
688 xtty->tail("print_native_nmethod"); | |
689 } | |
690 } | |
691 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
692 } | |
693 | |
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694 // For dtrace wrappers |
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695 #ifdef HAVE_DTRACE_H |
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696 nmethod::nmethod( |
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697 methodOop method, |
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698 int nmethod_size, |
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699 CodeOffsets* offsets, |
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700 CodeBuffer* code_buffer, |
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701 int frame_size) |
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702 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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703 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 704 _native_receiver_sp_offset(in_ByteSize(-1)), |
705 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
116
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706 { |
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707 { |
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708 debug_only(No_Safepoint_Verifier nsv;) |
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709 assert_locked_or_safepoint(CodeCache_lock); |
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710 |
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711 init_defaults(); |
116
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712 _method = method; |
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713 _entry_bci = InvocationEntryBci; |
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714 // We have no exception handler or deopt handler make the |
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715 // values something that will never match a pc like the nmethod vtable entry |
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716 _exception_offset = 0; |
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717 _deoptimize_offset = 0; |
1204 | 718 _deoptimize_mh_offset = 0; |
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719 _unwind_handler_offset = -1; |
116
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720 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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721 _orig_pc_offset = 0; |
1748 | 722 _consts_offset = data_offset(); |
116
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723 _stub_offset = data_offset(); |
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724 _oops_offset = data_offset(); |
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725 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
116
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726 _scopes_pcs_offset = _scopes_data_offset; |
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727 _dependencies_offset = _scopes_pcs_offset; |
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728 _handler_table_offset = _dependencies_offset; |
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729 _nul_chk_table_offset = _handler_table_offset; |
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730 _nmethod_end_offset = _nul_chk_table_offset; |
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731 _compile_id = 0; // default |
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732 _comp_level = CompLevel_none; |
1748 | 733 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
734 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
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735 _osr_entry_point = NULL; |
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736 _exception_cache = NULL; |
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737 _pc_desc_cache.reset_to(NULL); |
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738 |
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739 code_buffer->copy_oops_to(this); |
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740 debug_only(verify_scavenge_root_oops()); |
116
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741 CodeCache::commit(this); |
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742 } |
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743 |
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744 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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745 ttyLocker ttyl; // keep the following output all in one block |
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746 // This output goes directly to the tty, not the compiler log. |
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747 // To enable tools to match it up with the compilation activity, |
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748 // be sure to tag this tty output with the compile ID. |
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749 if (xtty != NULL) { |
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750 xtty->begin_head("print_dtrace_nmethod"); |
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751 xtty->method(_method); |
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752 xtty->stamp(); |
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753 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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754 } |
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755 // print the header part first |
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756 print(); |
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757 // then print the requested information |
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758 if (PrintNMethods) { |
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759 print_code(); |
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760 } |
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761 if (PrintRelocations) { |
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762 print_relocations(); |
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763 } |
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764 if (xtty != NULL) { |
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765 xtty->tail("print_dtrace_nmethod"); |
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766 } |
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767 } |
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768 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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769 } |
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770 #endif // def HAVE_DTRACE_H |
0 | 771 |
772 void* nmethod::operator new(size_t size, int nmethod_size) { | |
773 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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774 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 775 return CodeCache::allocate(nmethod_size); |
776 } | |
777 | |
778 | |
779 nmethod::nmethod( | |
780 methodOop method, | |
781 int nmethod_size, | |
782 int compile_id, | |
783 int entry_bci, | |
784 CodeOffsets* offsets, | |
785 int orig_pc_offset, | |
786 DebugInformationRecorder* debug_info, | |
787 Dependencies* dependencies, | |
788 CodeBuffer *code_buffer, | |
789 int frame_size, | |
790 OopMapSet* oop_maps, | |
791 ExceptionHandlerTable* handler_table, | |
792 ImplicitExceptionTable* nul_chk_table, | |
793 AbstractCompiler* compiler, | |
794 int comp_level | |
795 ) | |
796 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
797 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 798 _native_receiver_sp_offset(in_ByteSize(-1)), |
799 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 800 { |
801 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
802 { | |
803 debug_only(No_Safepoint_Verifier nsv;) | |
804 assert_locked_or_safepoint(CodeCache_lock); | |
805 | |
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806 init_defaults(); |
0 | 807 _method = method; |
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808 _entry_bci = entry_bci; |
0 | 809 _compile_id = compile_id; |
810 _comp_level = comp_level; | |
811 _compiler = compiler; | |
812 _orig_pc_offset = orig_pc_offset; | |
1748 | 813 |
814 // Section offsets | |
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815 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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816 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 817 |
818 // Exception handler and deopt handler are in the stub section | |
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819 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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820 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
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821 if (UseGraal) { |
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822 // graal produces no (!) stub section |
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823 _exception_offset = code_offset() + offsets->value(CodeOffsets::Exceptions); |
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824 _deoptimize_offset = code_offset() + offsets->value(CodeOffsets::Deopt); |
2106 | 825 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
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826 _deoptimize_mh_offset = code_offset() + offsets->value(CodeOffsets::DeoptMH); |
1930 | 827 } else { |
828 _deoptimize_mh_offset = -1; | |
829 } | |
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830 } else { |
1930 | 831 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
832 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
2106 | 833 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1930 | 834 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
835 } else { | |
836 _deoptimize_mh_offset = -1; | |
837 } | |
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838 } |
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839 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 840 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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841 } else { |
1748 | 842 _unwind_handler_offset = -1; |
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843 } |
1748 | 844 |
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845 _oops_offset = data_offset(); |
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846 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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847 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 848 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
849 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
850 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
851 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
852 | |
1748 | 853 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
854 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
855 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 856 _exception_cache = NULL; |
857 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
858 | |
859 // Copy contents of ScopeDescRecorder to nmethod | |
860 code_buffer->copy_oops_to(this); | |
861 debug_info->copy_to(this); | |
862 dependencies->copy_to(this); | |
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863 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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864 CodeCache::add_scavenge_root_nmethod(this); |
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865 } |
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866 debug_only(verify_scavenge_root_oops()); |
0 | 867 |
868 CodeCache::commit(this); | |
869 | |
870 // Copy contents of ExceptionHandlerTable to nmethod | |
871 handler_table->copy_to(this); | |
872 nul_chk_table->copy_to(this); | |
873 | |
874 // we use the information of entry points to find out if a method is | |
875 // static or non static | |
876 assert(compiler->is_c2() || | |
877 _method->is_static() == (entry_point() == _verified_entry_point), | |
878 " entry points must be same for static methods and vice versa"); | |
879 } | |
880 | |
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881 bool printnmethods = PrintNMethods |
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882 || CompilerOracle::should_print(_method) |
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883 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 884 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
885 print_nmethod(printnmethods); | |
886 } | |
887 | |
888 // Note: Do not verify in here as the CodeCache_lock is | |
889 // taken which would conflict with the CompiledIC_lock | |
890 // which taken during the verification of call sites. | |
891 // (was bug - gri 10/25/99) | |
892 | |
893 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
894 } | |
895 | |
896 | |
897 // Print a short set of xml attributes to identify this nmethod. The | |
898 // output should be embedded in some other element. | |
899 void nmethod::log_identity(xmlStream* log) const { | |
900 log->print(" compile_id='%d'", compile_id()); | |
901 const char* nm_kind = compile_kind(); | |
902 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
903 if (compiler() != NULL) { | |
904 log->print(" compiler='%s'", compiler()->name()); | |
905 } | |
1783 | 906 if (TieredCompilation) { |
907 log->print(" level='%d'", comp_level()); | |
908 } | |
0 | 909 } |
910 | |
911 | |
912 #define LOG_OFFSET(log, name) \ | |
913 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
914 log->print(" " XSTR(name) "_offset='%d'" , \ | |
915 (intptr_t)name##_begin() - (intptr_t)this) | |
916 | |
917 | |
918 void nmethod::log_new_nmethod() const { | |
919 if (LogCompilation && xtty != NULL) { | |
920 ttyLocker ttyl; | |
921 HandleMark hm; | |
922 xtty->begin_elem("nmethod"); | |
923 log_identity(xtty); | |
1748 | 924 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 925 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
926 | |
927 LOG_OFFSET(xtty, relocation); | |
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928 LOG_OFFSET(xtty, consts); |
1748 | 929 LOG_OFFSET(xtty, insts); |
0 | 930 LOG_OFFSET(xtty, stub); |
931 LOG_OFFSET(xtty, scopes_data); | |
932 LOG_OFFSET(xtty, scopes_pcs); | |
933 LOG_OFFSET(xtty, dependencies); | |
934 LOG_OFFSET(xtty, handler_table); | |
935 LOG_OFFSET(xtty, nul_chk_table); | |
936 LOG_OFFSET(xtty, oops); | |
937 | |
938 xtty->method(method()); | |
939 xtty->stamp(); | |
940 xtty->end_elem(); | |
941 } | |
942 } | |
943 | |
944 #undef LOG_OFFSET | |
945 | |
946 | |
947 // Print out more verbose output usually for a newly created nmethod. | |
2405
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948 void nmethod::print_on(outputStream* st, const char* msg) const { |
0 | 949 if (st != NULL) { |
950 ttyLocker ttyl; | |
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951 CompileTask::print_compilation(st, this, msg); |
0 | 952 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
953 } | |
954 } | |
955 | |
956 | |
957 void nmethod::print_nmethod(bool printmethod) { | |
958 ttyLocker ttyl; // keep the following output all in one block | |
959 if (xtty != NULL) { | |
960 xtty->begin_head("print_nmethod"); | |
961 xtty->stamp(); | |
962 xtty->end_head(); | |
963 } | |
964 // print the header part first | |
965 print(); | |
966 // then print the requested information | |
967 if (printmethod) { | |
968 print_code(); | |
969 print_pcs(); | |
970 oop_maps()->print(); | |
971 } | |
972 if (PrintDebugInfo) { | |
973 print_scopes(); | |
974 } | |
975 if (PrintRelocations) { | |
976 print_relocations(); | |
977 } | |
978 if (PrintDependencies) { | |
979 print_dependencies(); | |
980 } | |
981 if (PrintExceptionHandlers) { | |
982 print_handler_table(); | |
983 print_nul_chk_table(); | |
984 } | |
985 if (xtty != NULL) { | |
986 xtty->tail("print_nmethod"); | |
987 } | |
988 } | |
989 | |
990 | |
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991 // Promote one word from an assembly-time handle to a live embedded oop. |
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992 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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993 if (handle == NULL || |
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994 // As a special case, IC oops are initialized to 1 or -1. |
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995 handle == (jobject) Universe::non_oop_word()) { |
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996 (*dest) = (oop) handle; |
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997 } else { |
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998 (*dest) = JNIHandles::resolve_non_null(handle); |
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999 } |
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1000 } |
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1001 |
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1002 |
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1003 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1004 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1005 int length = array->length(); |
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1006 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1007 oop* dest = oops_begin(); |
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1008 for (int index = 0 ; index < length; index++) { |
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1009 initialize_immediate_oop(&dest[index], array->at(index)); |
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1010 } |
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1011 |
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1012 // Now we can fix up all the oops in the code. We need to do this |
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1013 // in the code because the assembler uses jobjects as placeholders. |
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1014 // The code and relocations have already been initialized by the |
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1015 // CodeBlob constructor, so it is valid even at this early point to |
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1016 // iterate over relocations and patch the code. |
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1017 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1018 } |
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1019 |
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1020 |
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1021 bool nmethod::is_at_poll_return(address pc) { |
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1022 RelocIterator iter(this, pc, pc+1); |
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1023 while (iter.next()) { |
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1024 if (iter.type() == relocInfo::poll_return_type) |
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1025 return true; |
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1026 } |
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1027 return false; |
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1028 } |
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1029 |
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1030 |
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1031 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1032 RelocIterator iter(this, pc, pc+1); |
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1033 while (iter.next()) { |
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1034 relocInfo::relocType t = iter.type(); |
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1035 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1036 return true; |
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1037 } |
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1038 return false; |
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1039 } |
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1040 |
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1041 |
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1042 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1043 // re-patch all oop-bearing instructions, just in case some oops moved |
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1044 RelocIterator iter(this, begin, end); |
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1045 while (iter.next()) { |
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1046 if (iter.type() == relocInfo::oop_type) { |
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1047 oop_Relocation* reloc = iter.oop_reloc(); |
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1048 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1049 oop* dest = reloc->oop_addr(); |
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1050 initialize_immediate_oop(dest, (jobject) *dest); |
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1051 } |
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1052 // Refresh the oop-related bits of this instruction. |
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1053 reloc->fix_oop_relocation(); |
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1054 } |
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1055 |
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1056 // There must not be any interfering patches or breakpoints. |
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1057 assert(!(iter.type() == relocInfo::breakpoint_type |
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1058 && iter.breakpoint_reloc()->active()), |
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1059 "no active breakpoint"); |
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1060 } |
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1061 } |
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1062 |
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1063 |
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1064 void nmethod::verify_oop_relocations() { |
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1065 // Ensure sure that the code matches the current oop values |
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1066 RelocIterator iter(this, NULL, NULL); |
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1067 while (iter.next()) { |
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1068 if (iter.type() == relocInfo::oop_type) { |
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1069 oop_Relocation* reloc = iter.oop_reloc(); |
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1070 if (!reloc->oop_is_immediate()) { |
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1071 reloc->verify_oop_relocation(); |
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1072 } |
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1073 } |
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1074 } |
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1075 } |
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1076 |
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1077 |
0 | 1078 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1079 PcDesc* pd = pc_desc_at(pc); | |
1080 guarantee(pd != NULL, "scope must be present"); | |
1081 return new ScopeDesc(this, pd->scope_decode_offset(), | |
3018
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1082 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), |
1253
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1083 pd->return_oop()); |
0 | 1084 } |
1085 | |
1086 | |
1087 void nmethod::clear_inline_caches() { | |
1088 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1089 if (is_zombie()) { | |
1090 return; | |
1091 } | |
1092 | |
1093 RelocIterator iter(this); | |
1094 while (iter.next()) { | |
1095 iter.reloc()->clear_inline_cache(); | |
1096 } | |
1097 } | |
1098 | |
1099 | |
1100 void nmethod::cleanup_inline_caches() { | |
1101 | |
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1102 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1103 |
1104 // If the method is not entrant or zombie then a JMP is plastered over the | |
1105 // first few bytes. If an oop in the old code was there, that oop | |
1106 // should not get GC'd. Skip the first few bytes of oops on | |
1107 // not-entrant methods. | |
1108 address low_boundary = verified_entry_point(); | |
1109 if (!is_in_use()) { | |
1110 low_boundary += NativeJump::instruction_size; | |
1111 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1112 // This means that the low_boundary is going to be a little too high. | |
1113 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1114 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1115 } | |
1116 | |
1117 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1118 ResourceMark rm; | |
1119 RelocIterator iter(this, low_boundary); | |
1120 while(iter.next()) { | |
1121 switch(iter.type()) { | |
1122 case relocInfo::virtual_call_type: | |
1123 case relocInfo::opt_virtual_call_type: { | |
1124 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1125 // Ok, to lookup references to zombies here | |
1126 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1127 if( cb != NULL && cb->is_nmethod() ) { | |
1128 nmethod* nm = (nmethod*)cb; | |
1129 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1130 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1131 } |
1132 break; | |
1133 } | |
1134 case relocInfo::static_call_type: { | |
1135 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1136 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1137 if( cb != NULL && cb->is_nmethod() ) { | |
1138 nmethod* nm = (nmethod*)cb; | |
1139 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1140 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1141 } |
1142 break; | |
1143 } | |
1144 } | |
1145 } | |
1146 } | |
1147 | |
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1148 // This is a private interface with the sweeper. |
0 | 1149 void nmethod::mark_as_seen_on_stack() { |
1150 assert(is_not_entrant(), "must be a non-entrant method"); | |
1644
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1151 // Set the traversal mark to ensure that the sweeper does 2 |
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1152 // cleaning passes before moving to zombie. |
0 | 1153 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1154 } | |
1155 | |
2342
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1156 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1157 // there are no activations on the stack, not in use by the VM, |
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1158 // and not in use by the ServiceThread) |
0 | 1159 bool nmethod::can_not_entrant_be_converted() { |
1160 assert(is_not_entrant(), "must be a non-entrant method"); | |
1161 | |
1162 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1163 // count can be greater than the stack traversal count before it hits the | |
1164 // nmethod for the second time. | |
2342
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1165 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1166 !is_locked_by_vm(); |
0 | 1167 } |
1168 | |
1169 void nmethod::inc_decompile_count() { | |
1783 | 1170 if (!is_compiled_by_c2()) return; |
0 | 1171 // Could be gated by ProfileTraps, but do not bother... |
1172 methodOop m = method(); | |
1173 if (m == NULL) return; | |
1174 methodDataOop mdo = m->method_data(); | |
1175 if (mdo == NULL) return; | |
1176 // There is a benign race here. See comments in methodDataOop.hpp. | |
1177 mdo->inc_decompile_count(); | |
1178 } | |
1179 | |
1180 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1181 | |
1182 post_compiled_method_unload(); | |
1183 | |
1184 // Since this nmethod is being unloaded, make sure that dependencies | |
1185 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1186 // indicate that this work is being done during a GC. | |
1187 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1188 assert(is_alive != NULL, "Should be non-NULL"); | |
1189 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1190 flush_dependencies(is_alive); | |
1191 | |
1192 // Break cycle between nmethod & method | |
1193 if (TraceClassUnloading && WizardMode) { | |
1194 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1195 " unloadable], methodOop(" INTPTR_FORMAT | |
1196 "), cause(" INTPTR_FORMAT ")", | |
1197 this, (address)_method, (address)cause); | |
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1198 if (!Universe::heap()->is_gc_active()) |
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1199 cause->klass()->print(); |
0 | 1200 } |
941 | 1201 // Unlink the osr method, so we do not look this up again |
1202 if (is_osr_method()) { | |
1203 invalidate_osr_method(); | |
1204 } | |
0 | 1205 // If _method is already NULL the methodOop is about to be unloaded, |
1206 // so we don't have to break the cycle. Note that it is possible to | |
1207 // have the methodOop live here, in case we unload the nmethod because | |
1208 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1209 if (_method != NULL) { | |
1210 // OSR methods point to the methodOop, but the methodOop does not | |
1211 // point back! | |
1212 if (_method->code() == this) { | |
1213 _method->clear_code(); // Break a cycle | |
1214 } | |
1215 _method = NULL; // Clear the method of this dead nmethod | |
1216 } | |
1217 // Make the class unloaded - i.e., change state and notify sweeper | |
1538
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1218 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1219 if (is_in_use()) { |
1220 // Transitioning directly from live to unloaded -- so | |
1221 // we need to force a cache clean-up; remember this | |
1222 // for later on. | |
1223 CodeCache::set_needs_cache_clean(true); | |
1224 } | |
1644
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1225 _state = unloaded; |
0 | 1226 |
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1227 // Log the unloading. |
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1228 log_state_change(); |
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1229 |
0 | 1230 // The methodOop is gone at this point |
1231 assert(_method == NULL, "Tautology"); | |
1232 | |
989
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1233 set_osr_link(NULL); |
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1234 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1235 NMethodSweeper::notify(this); |
1236 } | |
1237 | |
1238 void nmethod::invalidate_osr_method() { | |
1239 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1240 // Remove from list of active nmethods | |
1241 if (method() != NULL) | |
1242 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1243 // Set entry as invalid | |
1244 _entry_bci = InvalidOSREntryBci; | |
1245 } | |
1246 | |
1109
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1247 void nmethod::log_state_change() const { |
0 | 1248 if (LogCompilation) { |
1249 if (xtty != NULL) { | |
1250 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1251 if (_state == unloaded) { |
1109
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1252 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1253 os::current_thread_id()); |
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1254 } else { |
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1255 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1256 os::current_thread_id(), |
1644
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1257 (_state == zombie ? " zombie='1'" : "")); |
1109
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1258 } |
0 | 1259 log_identity(xtty); |
1260 xtty->stamp(); | |
1261 xtty->end_elem(); | |
1262 } | |
1263 } | |
1644
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1264 if (PrintCompilation && _state != unloaded) { |
2405
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1265 print_on(tty, _state == zombie ? "made zombie" : "made not entrant"); |
0 | 1266 } |
1267 } | |
1268 | |
1269 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1270 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1271 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
2342
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1272 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1273 |
1644
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1274 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1275 nmethodLocker nml(this); |
1644
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1276 methodHandle the_method(method()); |
1726 | 1277 No_Safepoint_Verifier nsv; |
0 | 1278 |
1279 { | |
1109
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1280 // invalidate osr nmethod before acquiring the patching lock since |
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1281 // they both acquire leaf locks and we don't want a deadlock. |
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1282 // This logic is equivalent to the logic below for patching the |
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1283 // verified entry point of regular methods. |
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1284 if (is_osr_method()) { |
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1285 // this effectively makes the osr nmethod not entrant |
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1286 invalidate_osr_method(); |
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1287 } |
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1288 |
0 | 1289 // Enter critical section. Does not block for safepoint. |
1290 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1109
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1291 |
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1292 if (_state == state) { |
1109
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1293 // another thread already performed this transition so nothing |
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1294 // to do, but return false to indicate this. |
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1295 return false; |
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1296 } |
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1297 |
0 | 1298 // The caller can be calling the method statically or through an inline |
1299 // cache call. | |
1109
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1300 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1301 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1302 SharedRuntime::get_handle_wrong_method_stub()); | |
1303 } | |
1304 | |
1644
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1305 if (is_in_use()) { |
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1306 // It's a true state change, so mark the method as decompiled. |
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1307 // Do it only for transition from alive. |
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1308 inc_decompile_count(); |
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1309 } |
1206
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1310 |
0 | 1311 // Change state |
1644
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1312 _state = state; |
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1313 |
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1314 // Log the transition once |
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1315 log_state_change(); |
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1316 |
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1317 // Remove nmethod from method. |
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1318 // We need to check if both the _code and _from_compiled_code_entry_point |
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1319 // refer to this nmethod because there is a race in setting these two fields |
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1320 // in methodOop as seen in bugid 4947125. |
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1321 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1322 // could be flushed and the compiler and vtable stubs could still call |
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1323 // through it. |
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1324 if (method() != NULL && (method()->code() == this || |
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1325 method()->from_compiled_entry() == verified_entry_point())) { |
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1326 HandleMark hm; |
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1327 method()->clear_code(); |
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1328 } |
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1329 |
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1330 if (state == not_entrant) { |
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1331 mark_as_seen_on_stack(); |
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1332 } |
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1333 |
0 | 1334 } // leave critical region under Patching_lock |
1335 | |
1538
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1336 // When the nmethod becomes zombie it is no longer alive so the |
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1337 // dependencies must be flushed. nmethods in the not_entrant |
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1338 // state will be flushed later when the transition to zombie |
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1339 // happens or they get unloaded. |
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1340 if (state == zombie) { |
1726 | 1341 { |
1342 // Flushing dependecies must be done before any possible | |
1343 // safepoint can sneak in, otherwise the oops used by the | |
1344 // dependency logic could have become stale. | |
1345 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1346 flush_dependencies(NULL); | |
1347 } | |
1644
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1348 |
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1349 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1350 // event and it hasn't already been reported for this nmethod then |
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1351 // report it now. The event may have been reported earilier if the GC |
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1352 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1353 // we no longer go to a safepoint here. |
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1354 post_compiled_method_unload(); |
1726 | 1355 |
1356 #ifdef ASSERT | |
1357 // It's no longer safe to access the oops section since zombie | |
1358 // nmethods aren't scanned for GC. | |
1359 _oops_are_stale = true; | |
1360 #endif | |
1538
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1361 } else { |
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1362 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1363 } |
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1364 |
0 | 1365 if (TraceCreateZombies) { |
1366 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1367 } | |
1368 | |
1369 // Make sweeper aware that there is a zombie method that needs to be removed | |
1370 NMethodSweeper::notify(this); | |
1371 | |
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1372 return true; |
0 | 1373 } |
1374 | |
1375 void nmethod::flush() { | |
1376 // Note that there are no valid oops in the nmethod anymore. | |
1377 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1378 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1379 | |
1380 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1381 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1382 |
1383 // completely deallocate this method | |
1384 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1385 if (PrintMethodFlushing) { | |
1202 | 1386 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1387 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1388 } |
1389 | |
1390 // We need to deallocate any ExceptionCache data. | |
1391 // Note that we do not need to grab the nmethod lock for this, it | |
1392 // better be thread safe if we're disposing of it! | |
1393 ExceptionCache* ec = exception_cache(); | |
1394 set_exception_cache(NULL); | |
1395 while(ec != NULL) { | |
1396 ExceptionCache* next = ec->next(); | |
1397 delete ec; | |
1398 ec = next; | |
1399 } | |
1400 | |
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1401 if (on_scavenge_root_list()) { |
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1402 CodeCache::drop_scavenge_root_nmethod(this); |
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1403 } |
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1404 |
1202 | 1405 if (is_speculatively_disconnected()) { |
1406 CodeCache::remove_saved_code(this); | |
1407 } | |
1408 | |
1692 | 1409 #ifdef SHARK |
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1410 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1411 #endif // SHARK |
1412 | |
0 | 1413 ((CodeBlob*)(this))->flush(); |
1414 | |
1415 CodeCache::free(this); | |
1416 } | |
1417 | |
1418 | |
1419 // | |
1420 // Notify all classes this nmethod is dependent on that it is no | |
1421 // longer dependent. This should only be called in two situations. | |
1422 // First, when a nmethod transitions to a zombie all dependents need | |
1423 // to be clear. Since zombification happens at a safepoint there's no | |
1424 // synchronization issues. The second place is a little more tricky. | |
1425 // During phase 1 of mark sweep class unloading may happen and as a | |
1426 // result some nmethods may get unloaded. In this case the flushing | |
1427 // of dependencies must happen during phase 1 since after GC any | |
1428 // dependencies in the unloaded nmethod won't be updated, so | |
1429 // traversing the dependency information in unsafe. In that case this | |
1430 // function is called with a non-NULL argument and this function only | |
1431 // notifies instanceKlasses that are reachable | |
1432 | |
1433 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1434 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1435 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1436 "is_alive is non-NULL if and only if we are called during GC"); | |
1437 if (!has_flushed_dependencies()) { | |
1438 set_has_flushed_dependencies(); | |
1439 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1440 klassOop klass = deps.context_type(); | |
1441 if (klass == NULL) continue; // ignore things like evol_method | |
1442 | |
1443 // During GC the is_alive closure is non-NULL, and is used to | |
1444 // determine liveness of dependees that need to be updated. | |
1445 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1446 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1447 } | |
1448 } | |
1449 } | |
1450 } | |
1451 | |
1452 | |
1453 // If this oop is not live, the nmethod can be unloaded. | |
1454 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1455 OopClosure* keep_alive, | |
1456 oop* root, bool unloading_occurred) { | |
1457 assert(root != NULL, "just checking"); | |
1458 oop obj = *root; | |
1459 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1460 return false; | |
1461 } | |
1462 if (obj->is_compiledICHolder()) { | |
1463 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1464 if (is_alive->do_object_b( | |
1465 cichk_oop->holder_method()->method_holder()) && | |
1466 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1467 // The oop should be kept alive | |
1468 keep_alive->do_oop(root); | |
1469 return false; | |
1470 } | |
1471 } | |
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1472 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1473 // simply because one of its constant oops has gone dead. |
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1474 // No actual classes need to be unloaded in order for this to occur. |
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1475 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1476 make_unloaded(is_alive, obj); |
1477 return true; | |
1478 } | |
1479 | |
1480 // ------------------------------------------------------------------ | |
1481 // post_compiled_method_load_event | |
1482 // new method for install_code() path | |
1483 // Transfer information from compilation to jvmti | |
1484 void nmethod::post_compiled_method_load_event() { | |
1485 | |
1486 methodOop moop = method(); | |
1487 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1488 moop->klass_name()->bytes(), | |
1489 moop->klass_name()->utf8_length(), | |
1490 moop->name()->bytes(), | |
1491 moop->name()->utf8_length(), | |
1492 moop->signature()->bytes(), | |
1493 moop->signature()->utf8_length(), | |
1748 | 1494 insts_begin(), insts_size()); |
0 | 1495 |
1616
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1496 if (JvmtiExport::should_post_compiled_method_load() || |
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1497 JvmtiExport::should_post_compiled_method_unload()) { |
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1498 get_and_cache_jmethod_id(); |
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1499 } |
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1500 |
0 | 1501 if (JvmtiExport::should_post_compiled_method_load()) { |
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1502 // Let the Service thread (which is a real Java thread) post the event |
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1503 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1504 JvmtiDeferredEventQueue::enqueue( |
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1505 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1506 } |
1507 } | |
1508 | |
1616
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1509 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1510 if (_jmethod_id == NULL) { |
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1511 // Cache the jmethod_id since it can no longer be looked up once the |
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1512 // method itself has been marked for unloading. |
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1513 _jmethod_id = method()->jmethod_id(); |
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1514 } |
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1515 return _jmethod_id; |
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1516 } |
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1517 |
0 | 1518 void nmethod::post_compiled_method_unload() { |
1577
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1519 if (unload_reported()) { |
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1520 // During unloading we transition to unloaded and then to zombie |
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1521 // and the unloading is reported during the first transition. |
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1522 return; |
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1523 } |
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1524 |
0 | 1525 assert(_method != NULL && !is_unloaded(), "just checking"); |
1526 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1527 | |
1528 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1529 // post the event. Sometime later this nmethod will be made a zombie |
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1530 // by the sweeper but the methodOop will not be valid at that point. |
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1531 // If the _jmethod_id is null then no load event was ever requested |
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1532 // so don't bother posting the unload. The main reason for this is |
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1533 // that the jmethodID is a weak reference to the methodOop so if |
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1534 // it's being unloaded there's no way to look it up since the weak |
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1535 // ref will have been cleared. |
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1536 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1537 assert(!unload_reported(), "already unloaded"); |
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1538 JvmtiDeferredEvent event = |
2342
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
dcubed
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2321
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1539 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1540 _jmethod_id, insts_begin()); |
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1541 if (SafepointSynchronize::is_at_safepoint()) { |
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1542 // Don't want to take the queueing lock. Add it as pending and |
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1543 // it will get enqueued later. |
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1544 JvmtiDeferredEventQueue::add_pending_event(event); |
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1545 } else { |
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1546 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1547 JvmtiDeferredEventQueue::enqueue(event); |
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1548 } |
0 | 1549 } |
1550 | |
1551 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1552 // any time. As the nmethod is being unloaded now we mark it has | |
1553 // having the unload event reported - this will ensure that we don't | |
1554 // attempt to report the event in the unlikely scenario where the | |
1555 // event is enabled at the time the nmethod is made a zombie. | |
1556 set_unload_reported(); | |
1557 } | |
1558 | |
1559 // This is called at the end of the strong tracing/marking phase of a | |
1560 // GC to unload an nmethod if it contains otherwise unreachable | |
1561 // oops. | |
1562 | |
1563 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1564 OopClosure* keep_alive, bool unloading_occurred) { | |
1565 // Make sure the oop's ready to receive visitors | |
1566 assert(!is_zombie() && !is_unloaded(), | |
1567 "should not call follow on zombie or unloaded nmethod"); | |
1568 | |
1569 // If the method is not entrant then a JMP is plastered over the | |
1570 // first few bytes. If an oop in the old code was there, that oop | |
1571 // should not get GC'd. Skip the first few bytes of oops on | |
1572 // not-entrant methods. | |
1573 address low_boundary = verified_entry_point(); | |
1574 if (is_not_entrant()) { | |
1575 low_boundary += NativeJump::instruction_size; | |
1576 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1577 // (See comment above.) | |
1578 } | |
1579 | |
1580 // The RedefineClasses() API can cause the class unloading invariant | |
1581 // to no longer be true. See jvmtiExport.hpp for details. | |
1582 // Also, leave a debugging breadcrumb in local flag. | |
1583 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1584 if (a_class_was_redefined) { | |
1585 // This set of the unloading_occurred flag is done before the | |
1586 // call to post_compiled_method_unload() so that the unloading | |
1587 // of this nmethod is reported. | |
1588 unloading_occurred = true; | |
1589 } | |
1590 | |
1591 // Follow methodOop | |
1592 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1593 return; | |
1594 } | |
1595 | |
1596 // Exception cache | |
1597 ExceptionCache* ec = exception_cache(); | |
1598 while (ec != NULL) { | |
1599 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1600 oop ex = *ex_addr; | |
1601 ExceptionCache* next_ec = ec->next(); | |
1602 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1603 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1604 remove_from_exception_cache(ec); | |
1605 } | |
1606 ec = next_ec; | |
1607 } | |
1608 | |
1609 // If class unloading occurred we first iterate over all inline caches and | |
1610 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1611 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1612 // iteration below. | |
1613 if (unloading_occurred) { | |
1614 RelocIterator iter(this, low_boundary); | |
1615 while(iter.next()) { | |
1616 if (iter.type() == relocInfo::virtual_call_type) { | |
1617 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1618 oop ic_oop = ic->cached_oop(); | |
1619 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1620 // The only exception is compiledICHolder oops which may | |
1621 // yet be marked below. (We check this further below). | |
1622 if (ic_oop->is_compiledICHolder()) { | |
1623 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1624 if (is_alive->do_object_b( | |
1625 cichk_oop->holder_method()->method_holder()) && | |
1626 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1627 continue; | |
1628 } | |
1629 } | |
1630 ic->set_to_clean(); | |
1489
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jcoomes
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diff
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|
1631 assert(ic->cached_oop() == NULL, |
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jcoomes
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changeset
|
1632 "cached oop in IC should be cleared"); |
0 | 1633 } |
1634 } | |
1635 } | |
1636 } | |
1637 | |
1638 // Compiled code | |
1639 RelocIterator iter(this, low_boundary); | |
1640 while (iter.next()) { | |
1641 if (iter.type() == relocInfo::oop_type) { | |
1642 oop_Relocation* r = iter.oop_reloc(); | |
1643 // In this loop, we must only traverse those oops directly embedded in | |
1644 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1645 assert(1 == (r->oop_is_immediate()) + | |
1646 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1647 "oop must be found in exactly one place"); | |
1648 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1649 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1650 return; | |
1651 } | |
1652 } | |
1653 } | |
1654 } | |
1655 | |
1656 | |
1657 // Scopes | |
1658 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1659 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1660 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1661 return; | |
1662 } | |
1663 } | |
1664 | |
1665 #ifndef PRODUCT | |
1666 // This nmethod was not unloaded; check below that all CompiledICs | |
1667 // refer to marked oops. | |
1668 { | |
1669 RelocIterator iter(this, low_boundary); | |
1670 while (iter.next()) { | |
1671 if (iter.type() == relocInfo::virtual_call_type) { | |
1672 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1673 oop ic_oop = ic->cached_oop(); | |
1674 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1675 "Found unmarked ic_oop in reachable nmethod"); | |
1676 } | |
1677 } | |
1678 } | |
1679 #endif // !PRODUCT | |
1680 } | |
1681 | |
941 | 1682 // This method is called twice during GC -- once while |
1683 // tracing the "active" nmethods on thread stacks during | |
1684 // the (strong) marking phase, and then again when walking | |
1685 // the code cache contents during the weak roots processing | |
1686 // phase. The two uses are distinguished by means of the | |
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1687 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1688 // case. We want to walk the weak roots in the nmethod |
1689 // only in the second case. The weak roots in the nmethod | |
1690 // are the oops in the ExceptionCache and the InlineCache | |
1691 // oops. | |
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1692 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1693 // make sure the oops ready to receive visitors |
1694 assert(!is_zombie() && !is_unloaded(), | |
1695 "should not call follow on zombie or unloaded nmethod"); | |
1696 | |
1697 // If the method is not entrant or zombie then a JMP is plastered over the | |
1698 // first few bytes. If an oop in the old code was there, that oop | |
1699 // should not get GC'd. Skip the first few bytes of oops on | |
1700 // not-entrant methods. | |
1701 address low_boundary = verified_entry_point(); | |
1702 if (is_not_entrant()) { | |
1703 low_boundary += NativeJump::instruction_size; | |
1704 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1705 // (See comment above.) | |
1706 } | |
1707 | |
1708 // Compiled code | |
1709 f->do_oop((oop*) &_method); | |
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1710 if (!do_strong_roots_only) { |
941 | 1711 // weak roots processing phase -- update ExceptionCache oops |
1712 ExceptionCache* ec = exception_cache(); | |
1713 while(ec != NULL) { | |
1714 f->do_oop((oop*)ec->exception_type_addr()); | |
1715 ec = ec->next(); | |
1716 } | |
1717 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1718 |
1719 RelocIterator iter(this, low_boundary); | |
941 | 1720 |
0 | 1721 while (iter.next()) { |
1722 if (iter.type() == relocInfo::oop_type ) { | |
1723 oop_Relocation* r = iter.oop_reloc(); | |
1724 // In this loop, we must only follow those oops directly embedded in | |
1725 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1726 assert(1 == (r->oop_is_immediate()) + |
1727 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1728 "oop must be found in exactly one place"); | |
0 | 1729 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1730 f->do_oop(r->oop_addr()); | |
1731 } | |
1732 } | |
1733 } | |
1734 | |
1735 // Scopes | |
989
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1736 // This includes oop constants not inlined in the code stream. |
0 | 1737 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1738 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1739 f->do_oop(p); | |
1740 } | |
1741 } | |
1742 | |
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1743 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1744 |
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1745 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1746 |
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1747 // An nmethod is "marked" if its _mark_link is set non-null. |
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1748 // Even if it is the end of the linked list, it will have a non-null link value, |
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1749 // as long as it is on the list. |
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1750 // This code must be MP safe, because it is used from parallel GC passes. |
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1751 bool nmethod::test_set_oops_do_mark() { |
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1752 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1753 nmethod* observed_mark_link = _oops_do_mark_link; |
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1754 if (observed_mark_link == NULL) { |
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1755 // Claim this nmethod for this thread to mark. |
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1756 observed_mark_link = (nmethod*) |
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1757 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1758 if (observed_mark_link == NULL) { |
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1759 |
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1760 // Atomically append this nmethod (now claimed) to the head of the list: |
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1761 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1762 for (;;) { |
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1763 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1764 _oops_do_mark_link = required_mark_nmethods; |
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1765 observed_mark_nmethods = (nmethod*) |
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1766 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1767 if (observed_mark_nmethods == required_mark_nmethods) |
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1768 break; |
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1769 } |
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1770 // Mark was clear when we first saw this guy. |
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1771 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark")); |
989
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1772 return false; |
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1773 } |
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1774 } |
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1775 // On fall through, another racing thread marked this nmethod before we did. |
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1776 return true; |
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1777 } |
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1778 |
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1779 void nmethod::oops_do_marking_prologue() { |
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1780 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1781 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1782 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1783 // may fork a bunch of threads, and we need them all to see the same state. |
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1784 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1785 guarantee(observed == NULL, "no races in this sequential code"); |
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1786 } |
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1787 |
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1788 void nmethod::oops_do_marking_epilogue() { |
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1789 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1790 nmethod* cur = _oops_do_mark_nmethods; |
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1791 while (cur != NMETHOD_SENTINEL) { |
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1792 assert(cur != NULL, "not NULL-terminated"); |
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1793 nmethod* next = cur->_oops_do_mark_link; |
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1794 cur->_oops_do_mark_link = NULL; |
2375
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1795 cur->fix_oop_relocations(); |
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1796 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark")); |
989
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1797 cur = next; |
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1798 } |
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1799 void* required = _oops_do_mark_nmethods; |
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1800 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1801 guarantee(observed == required, "no races in this sequential code"); |
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1802 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1803 } |
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1804 |
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1805 class DetectScavengeRoot: public OopClosure { |
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1806 bool _detected_scavenge_root; |
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1807 public: |
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1808 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1809 { NOT_PRODUCT(_print_nm = NULL); } |
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1810 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1811 virtual void do_oop(oop* p) { |
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1812 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1813 NOT_PRODUCT(maybe_print(p)); |
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1814 _detected_scavenge_root = true; |
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1815 } |
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1816 } |
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1817 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1818 |
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1819 #ifndef PRODUCT |
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1820 nmethod* _print_nm; |
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1821 void maybe_print(oop* p) { |
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1822 if (_print_nm == NULL) return; |
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1823 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1824 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1825 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1826 (intptr_t)(*p), (intptr_t)p); |
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1827 (*p)->print(); |
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1828 } |
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1829 #endif //PRODUCT |
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1830 }; |
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1831 |
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1832 bool nmethod::detect_scavenge_root_oops() { |
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1833 DetectScavengeRoot detect_scavenge_root; |
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1834 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1835 oops_do(&detect_scavenge_root); |
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1836 return detect_scavenge_root.detected_scavenge_root(); |
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1837 } |
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1838 |
0 | 1839 // Method that knows how to preserve outgoing arguments at call. This method must be |
1840 // called with a frame corresponding to a Java invoke | |
1841 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1842 #ifndef SHARK |
0 | 1843 if (!method()->is_native()) { |
1844 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1845 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1846 bool has_receiver = call.has_receiver(); | |
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1847 Symbol* signature = call.signature(); |
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1848 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1849 } |
1692 | 1850 #endif // !SHARK |
0 | 1851 } |
1852 | |
1853 | |
1854 oop nmethod::embeddedOop_at(u_char* p) { | |
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1855 RelocIterator iter(this, p, p + 1); |
0 | 1856 while (iter.next()) |
1857 if (iter.type() == relocInfo::oop_type) { | |
1858 return iter.oop_reloc()->oop_value(); | |
1859 } | |
1860 return NULL; | |
1861 } | |
1862 | |
1863 | |
1864 inline bool includes(void* p, void* from, void* to) { | |
1865 return from <= p && p < to; | |
1866 } | |
1867 | |
1868 | |
1869 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1870 assert(count >= 2, "must be sentinel values, at least"); | |
1871 | |
1872 #ifdef ASSERT | |
1873 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1874 int prev_offset = pcs[0].pc_offset(); | |
1875 assert(prev_offset == PcDesc::lower_offset_limit, | |
1876 "must start with a sentinel"); | |
1877 for (int i = 1; i < count; i++) { | |
1878 int this_offset = pcs[i].pc_offset(); | |
1879 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1880 prev_offset = this_offset; | |
1881 } | |
1882 assert(prev_offset == PcDesc::upper_offset_limit, | |
1883 "must end with a sentinel"); | |
1884 #endif //ASSERT | |
1885 | |
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1886 // Search for MethodHandle invokes and tag the nmethod. |
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1887 for (int i = 0; i < count; i++) { |
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1888 if (pcs[i].is_method_handle_invoke()) { |
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1889 set_has_method_handle_invokes(true); |
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1890 break; |
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1891 } |
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1892 } |
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1893 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1894 |
0 | 1895 int size = count * sizeof(PcDesc); |
1896 assert(scopes_pcs_size() >= size, "oob"); | |
1897 memcpy(scopes_pcs_begin(), pcs, size); | |
1898 | |
1899 // Adjust the final sentinel downward. | |
1900 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1901 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1902 last_pc->set_pc_offset(content_size() + 1); |
0 | 1903 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1904 // Fill any rounding gaps with copies of the last record. | |
1905 last_pc[1] = last_pc[0]; | |
1906 } | |
1907 // The following assert could fail if sizeof(PcDesc) is not | |
1908 // an integral multiple of oopSize (the rounding term). | |
1909 // If it fails, change the logic to always allocate a multiple | |
1910 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1911 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1912 } | |
1913 | |
1914 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1915 assert(scopes_data_size() >= size, "oob"); | |
1916 memcpy(scopes_data_begin(), buffer, size); | |
1917 } | |
1918 | |
1919 | |
1920 #ifdef ASSERT | |
1921 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1922 PcDesc* lower = nm->scopes_pcs_begin(); | |
1923 PcDesc* upper = nm->scopes_pcs_end(); | |
1924 lower += 1; // exclude initial sentinel | |
1925 PcDesc* res = NULL; | |
1926 for (PcDesc* p = lower; p < upper; p++) { | |
1927 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1928 if (match_desc(p, pc_offset, approximate)) { | |
1929 if (res == NULL) | |
1930 res = p; | |
1931 else | |
1932 res = (PcDesc*) badAddress; | |
1933 } | |
1934 } | |
1935 return res; | |
1936 } | |
1937 #endif | |
1938 | |
1939 | |
1940 // Finds a PcDesc with real-pc equal to "pc" | |
1941 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1942 address base_address = code_begin(); |
0 | 1943 if ((pc < base_address) || |
1944 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1945 return NULL; // PC is wildly out of range | |
1946 } | |
1947 int pc_offset = (int) (pc - base_address); | |
1948 | |
1949 // Check the PcDesc cache if it contains the desired PcDesc | |
1950 // (This as an almost 100% hit rate.) | |
1951 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1952 if (res != NULL) { | |
1953 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1954 return res; | |
1955 } | |
1956 | |
1957 // Fallback algorithm: quasi-linear search for the PcDesc | |
1958 // Find the last pc_offset less than the given offset. | |
1959 // The successor must be the required match, if there is a match at all. | |
1960 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1961 PcDesc* lower = scopes_pcs_begin(); | |
1962 PcDesc* upper = scopes_pcs_end(); | |
1963 upper -= 1; // exclude final sentinel | |
1964 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1965 | |
1966 #define assert_LU_OK \ | |
1967 /* invariant on lower..upper during the following search: */ \ | |
1968 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1969 assert(upper->pc_offset() >= pc_offset, "sanity") | |
1970 assert_LU_OK; | |
1971 | |
1972 // Use the last successful return as a split point. | |
1973 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
1974 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1975 if (mid->pc_offset() < pc_offset) { | |
1976 lower = mid; | |
1977 } else { | |
1978 upper = mid; | |
1979 } | |
1980 | |
1981 // Take giant steps at first (4096, then 256, then 16, then 1) | |
1982 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
1983 const int RADIX = (1 << LOG2_RADIX); | |
1984 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
1985 while ((mid = lower + step) < upper) { | |
1986 assert_LU_OK; | |
1987 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
1988 if (mid->pc_offset() < pc_offset) { | |
1989 lower = mid; | |
1990 } else { | |
1991 upper = mid; | |
1992 break; | |
1993 } | |
1994 } | |
1995 assert_LU_OK; | |
1996 } | |
1997 | |
1998 // Sneak up on the value with a linear search of length ~16. | |
1999 while (true) { | |
2000 assert_LU_OK; | |
2001 mid = lower + 1; | |
2002 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2003 if (mid->pc_offset() < pc_offset) { | |
2004 lower = mid; | |
2005 } else { | |
2006 upper = mid; | |
2007 break; | |
2008 } | |
2009 } | |
2010 #undef assert_LU_OK | |
2011 | |
2012 if (match_desc(upper, pc_offset, approximate)) { | |
2013 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2014 _pc_desc_cache.add_pc_desc(upper); | |
2015 return upper; | |
2016 } else { | |
2017 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2018 return NULL; | |
2019 } | |
2020 } | |
2021 | |
2022 | |
2023 bool nmethod::check_all_dependencies() { | |
2024 bool found_check = false; | |
2025 // wholesale check of all dependencies | |
2026 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2027 if (deps.check_dependency() != NULL) { | |
2028 found_check = true; | |
2029 NOT_DEBUG(break); | |
2030 } | |
2031 } | |
2032 return found_check; // tell caller if we found anything | |
2033 } | |
2034 | |
2035 bool nmethod::check_dependency_on(DepChange& changes) { | |
2036 // What has happened: | |
2037 // 1) a new class dependee has been added | |
2038 // 2) dependee and all its super classes have been marked | |
2039 bool found_check = false; // set true if we are upset | |
2040 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2041 // Evaluate only relevant dependencies. | |
2042 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2043 found_check = true; | |
2044 NOT_DEBUG(break); | |
2045 } | |
2046 } | |
2047 return found_check; | |
2048 } | |
2049 | |
2050 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2051 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2052 objArrayOop dependee_methods = dependee_ik->methods(); | |
2053 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2054 if (deps.type() == Dependencies::evol_method) { | |
2055 methodOop method = deps.method_argument(0); | |
2056 for (int j = 0; j < dependee_methods->length(); j++) { | |
2057 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2058 // RC_TRACE macro has an embedded ResourceMark | |
2059 RC_TRACE(0x01000000, | |
2060 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2061 _method->method_holder()->klass_part()->external_name(), | |
2062 _method->name()->as_C_string(), | |
2063 _method->signature()->as_C_string(), compile_id(), | |
2064 method->method_holder()->klass_part()->external_name(), | |
2065 method->name()->as_C_string(), | |
2066 method->signature()->as_C_string())); | |
2067 if (TraceDependencies || LogCompilation) | |
2068 deps.log_dependency(dependee); | |
2069 return true; | |
2070 } | |
2071 } | |
2072 } | |
2073 } | |
2074 return false; | |
2075 } | |
2076 | |
2077 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2078 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2079 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2080 if (deps.type() != Dependencies::evol_method) | |
2081 continue; | |
2082 methodOop method = deps.method_argument(0); | |
2083 if (method == dependee) return true; | |
2084 } | |
2085 return false; | |
2086 } | |
2087 | |
2088 | |
2089 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2090 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2091 if (is_zombie()) { |
2092 // a zombie may never be patched | |
2093 return false; | |
2094 } | |
2095 return true; | |
2096 } | |
2097 | |
2098 | |
2099 address nmethod::continuation_for_implicit_exception(address pc) { | |
2100 // Exception happened outside inline-cache check code => we are inside | |
2101 // an active nmethod => use cpc to determine a return address | |
1748 | 2102 int exception_offset = pc - code_begin(); |
0 | 2103 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2104 #ifdef ASSERT | |
2105 if (cont_offset == 0) { | |
2106 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2107 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2108 HandleMark hm(thread); | |
2109 ResourceMark rm(thread); | |
2110 CodeBlob* cb = CodeCache::find_blob(pc); | |
2111 assert(cb != NULL && cb == this, ""); | |
2112 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2113 print(); | |
2114 method()->print_codes(); | |
2115 print_code(); | |
2116 print_pcs(); | |
2117 } | |
2118 #endif | |
1250 | 2119 if (cont_offset == 0) { |
2120 // Let the normal error handling report the exception | |
2121 return NULL; | |
2122 } | |
1748 | 2123 return code_begin() + cont_offset; |
0 | 2124 } |
2125 | |
2126 | |
2127 | |
2128 void nmethod_init() { | |
2129 // make sure you didn't forget to adjust the filler fields | |
2130 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2131 } | |
2132 | |
2133 | |
2134 //------------------------------------------------------------------------------------------- | |
2135 | |
2136 | |
2137 // QQQ might we make this work from a frame?? | |
2138 nmethodLocker::nmethodLocker(address pc) { | |
2139 CodeBlob* cb = CodeCache::find_blob(pc); | |
2140 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2141 _nm = (nmethod*)cb; | |
2142 lock_nmethod(_nm); | |
2143 } | |
2144 | |
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2145 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2146 // should pass zombie_ok == true. |
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2147 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2148 if (nm == NULL) return; |
2149 Atomic::inc(&nm->_lock_count); | |
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2150 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2151 } |
2152 | |
2153 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2154 if (nm == NULL) return; | |
2155 Atomic::dec(&nm->_lock_count); | |
2156 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2157 } | |
2158 | |
1204 | 2159 |
2160 // ----------------------------------------------------------------------------- | |
2161 // nmethod::get_deopt_original_pc | |
2162 // | |
2163 // Return the original PC for the given PC if: | |
2164 // (a) the given PC belongs to a nmethod and | |
2165 // (b) it is a deopt PC | |
2166 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2167 if (fr->cb() == NULL) return NULL; | |
2168 | |
2169 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2170 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2171 return nm->get_original_pc(fr); | |
2172 | |
2173 return NULL; | |
0 | 2174 } |
2175 | |
2176 | |
2177 // ----------------------------------------------------------------------------- | |
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2178 // MethodHandle |
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2179 |
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2180 bool nmethod::is_method_handle_return(address return_pc) { |
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2181 if (!has_method_handle_invokes()) return false; |
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2182 PcDesc* pd = pc_desc_at(return_pc); |
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2183 if (pd == NULL) |
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2184 return false; |
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2185 return pd->is_method_handle_invoke(); |
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2186 } |
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2187 |
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2188 |
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2189 // ----------------------------------------------------------------------------- |
0 | 2190 // Verification |
2191 | |
989
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2192 class VerifyOopsClosure: public OopClosure { |
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2193 nmethod* _nm; |
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2194 bool _ok; |
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2195 public: |
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2196 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2197 bool ok() { return _ok; } |
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2198 virtual void do_oop(oop* p) { |
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2199 if ((*p) == NULL || (*p)->is_oop()) return; |
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2200 if (_ok) { |
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2201 _nm->print_nmethod(true); |
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2202 _ok = false; |
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2203 } |
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2204 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2205 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2206 } |
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2207 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2208 }; |
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2209 |
0 | 2210 void nmethod::verify() { |
2211 | |
2212 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2213 // seems odd. | |
2214 | |
2215 if( is_zombie() || is_not_entrant() ) | |
2216 return; | |
2217 | |
2218 // Make sure all the entry points are correctly aligned for patching. | |
2219 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2220 | |
2221 assert(method()->is_oop(), "must be valid"); | |
2222 | |
2223 ResourceMark rm; | |
2224 | |
2225 if (!CodeCache::contains(this)) { | |
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2226 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2227 } |
2228 | |
2229 if(is_native_method() ) | |
2230 return; | |
2231 | |
2232 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2233 if (nm != this) { | |
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2234 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2235 this)); |
0 | 2236 } |
2237 | |
2238 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2239 if (! p->verify(this)) { | |
2240 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2241 } | |
2242 } | |
2243 | |
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2244 VerifyOopsClosure voc(this); |
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2245 oops_do(&voc); |
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2246 assert(voc.ok(), "embedded oops must be OK"); |
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2247 verify_scavenge_root_oops(); |
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2248 |
0 | 2249 verify_scopes(); |
2250 } | |
2251 | |
2252 | |
2253 void nmethod::verify_interrupt_point(address call_site) { | |
2254 // This code does not work in release mode since | |
2255 // owns_lock only is available in debug mode. | |
2256 CompiledIC* ic = NULL; | |
2257 Thread *cur = Thread::current(); | |
2258 if (CompiledIC_lock->owner() == cur || | |
2259 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2260 SafepointSynchronize::is_at_safepoint())) { | |
2261 ic = CompiledIC_at(call_site); | |
2262 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2263 } else { | |
2264 MutexLocker ml_verify (CompiledIC_lock); | |
2265 ic = CompiledIC_at(call_site); | |
2266 } | |
2267 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2268 assert(pd != NULL, "PcDesc must exist"); | |
2269 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
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2270 pd->obj_decode_offset(), pd->should_reexecute(), pd->rethrow_exception(), |
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2271 pd->return_oop()); |
0 | 2272 !sd->is_top(); sd = sd->sender()) { |
2273 sd->verify(); | |
2274 } | |
2275 } | |
2276 | |
2277 void nmethod::verify_scopes() { | |
2278 if( !method() ) return; // Runtime stubs have no scope | |
2279 if (method()->is_native()) return; // Ignore stub methods. | |
2280 // iterate through all interrupt point | |
2281 // and verify the debug information is valid. | |
2282 RelocIterator iter((nmethod*)this); | |
2283 while (iter.next()) { | |
2284 address stub = NULL; | |
2285 switch (iter.type()) { | |
2286 case relocInfo::virtual_call_type: | |
2287 verify_interrupt_point(iter.addr()); | |
2288 break; | |
2289 case relocInfo::opt_virtual_call_type: | |
2290 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2291 verify_interrupt_point(iter.addr()); | |
2292 break; | |
2293 case relocInfo::static_call_type: | |
2294 stub = iter.static_call_reloc()->static_stub(); | |
2295 //verify_interrupt_point(iter.addr()); | |
2296 break; | |
2297 case relocInfo::runtime_call_type: | |
2298 address destination = iter.reloc()->value(); | |
2299 // Right now there is no way to find out which entries support | |
2300 // an interrupt point. It would be nice if we had this | |
2301 // information in a table. | |
2302 break; | |
2303 } | |
2891
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2491
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|
2304 assert(UseGraal || stub == NULL || stub_contains(stub), "static call stub outside stub section"); |
0 | 2305 } |
2306 } | |
2307 | |
2308 | |
2309 // ----------------------------------------------------------------------------- | |
2310 // Non-product code | |
2311 #ifndef PRODUCT | |
2312 | |
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2313 class DebugScavengeRoot: public OopClosure { |
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2314 nmethod* _nm; |
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2315 bool _ok; |
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2316 public: |
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2317 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2318 bool ok() { return _ok; } |
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2319 virtual void do_oop(oop* p) { |
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2320 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2321 if (_ok) { |
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2322 _nm->print_nmethod(true); |
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2323 _ok = false; |
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|
2324 } |
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2325 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2326 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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|
2327 (*p)->print(); |
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|
2328 } |
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|
2329 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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|
2330 }; |
0 | 2331 |
989
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2332 void nmethod::verify_scavenge_root_oops() { |
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|
2333 if (!on_scavenge_root_list()) { |
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2334 // Actually look inside, to verify the claim that it's clean. |
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|
2335 DebugScavengeRoot debug_scavenge_root(this); |
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|
2336 oops_do(&debug_scavenge_root); |
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|
2337 if (!debug_scavenge_root.ok()) |
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|
2338 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2339 } |
989
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2340 assert(scavenge_root_not_marked(), ""); |
0 | 2341 } |
2342 | |
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2343 #endif // PRODUCT |
0 | 2344 |
2345 // Printing operations | |
2346 | |
2347 void nmethod::print() const { | |
2348 ResourceMark rm; | |
2349 ttyLocker ttyl; // keep the following output all in one block | |
2350 | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
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2376
diff
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|
2351 tty->print("Compiled method "); |
0 | 2352 |
2353 if (is_compiled_by_c1()) { | |
2354 tty->print("(c1) "); | |
2355 } else if (is_compiled_by_c2()) { | |
2356 tty->print("(c2) "); | |
1692 | 2357 } else if (is_compiled_by_shark()) { |
2358 tty->print("(shark) "); | |
0 | 2359 } else { |
2360 tty->print("(nm) "); | |
2361 } | |
2362 | |
2405
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diff
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|
2363 print_on(tty, NULL); |
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|
2364 |
0 | 2365 if (WizardMode) { |
2366 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2367 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2368 tty->print(" { "); | |
2369 if (is_in_use()) tty->print("in_use "); | |
2370 if (is_not_entrant()) tty->print("not_entrant "); | |
2371 if (is_zombie()) tty->print("zombie "); | |
2372 if (is_unloaded()) tty->print("unloaded "); | |
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2373 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2374 tty->print_cr("}:"); |
2375 } | |
2376 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2377 (address)this, | |
2378 (address)this + size(), | |
2379 size()); | |
2380 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2381 relocation_begin(), | |
2382 relocation_end(), | |
2383 relocation_size()); | |
1762
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
parents:
1748
diff
changeset
|
2384 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
0878d7bae69f
6961697: move nmethod constants section before instruction section
twisti
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diff
changeset
|
2385 consts_begin(), |
0878d7bae69f
6961697: move nmethod constants section before instruction section
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diff
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|
2386 consts_end(), |
0878d7bae69f
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1748
diff
changeset
|
2387 consts_size()); |
1748 | 2388 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2389 insts_begin(), | |
2390 insts_end(), | |
2391 insts_size()); | |
0 | 2392 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2393 stub_begin(), | |
2394 stub_end(), | |
2395 stub_size()); | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
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1538
diff
changeset
|
2396 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
1a5913bf5e19
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diff
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|
2397 oops_begin(), |
1a5913bf5e19
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diff
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|
2398 oops_end(), |
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diff
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|
2399 oops_size()); |
0 | 2400 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2401 scopes_data_begin(), | |
2402 scopes_data_end(), | |
2403 scopes_data_size()); | |
2404 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2405 scopes_pcs_begin(), | |
2406 scopes_pcs_end(), | |
2407 scopes_pcs_size()); | |
2408 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2409 dependencies_begin(), | |
2410 dependencies_end(), | |
2411 dependencies_size()); | |
2412 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2413 handler_table_begin(), | |
2414 handler_table_end(), | |
2415 handler_table_size()); | |
2416 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2417 nul_chk_table_begin(), | |
2418 nul_chk_table_end(), | |
2419 nul_chk_table_size()); | |
2420 } | |
2421 | |
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diff
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|
2422 void nmethod::print_code() { |
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diff
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|
2423 HandleMark hm; |
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diff
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|
2424 ResourceMark m; |
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diff
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|
2425 Disassembler::decode(this); |
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diff
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|
2426 } |
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|
2427 |
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|
2428 |
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|
2429 #ifndef PRODUCT |
0 | 2430 |
2431 void nmethod::print_scopes() { | |
2432 // Find the first pc desc for all scopes in the code and print it. | |
2433 ResourceMark rm; | |
2434 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2435 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2436 continue; | |
2437 | |
2438 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2439 sd->print_on(tty, p); | |
2440 } | |
2441 } | |
2442 | |
2443 void nmethod::print_dependencies() { | |
2444 ResourceMark rm; | |
2445 ttyLocker ttyl; // keep the following output all in one block | |
2446 tty->print_cr("Dependencies:"); | |
2447 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2448 deps.print_dependency(); | |
2449 klassOop ctxk = deps.context_type(); | |
2450 if (ctxk != NULL) { | |
2451 Klass* k = Klass::cast(ctxk); | |
2452 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2453 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2454 } |
2455 } | |
2456 deps.log_dependency(); // put it into the xml log also | |
2457 } | |
2458 } | |
2459 | |
2460 | |
2461 void nmethod::print_relocations() { | |
2462 ResourceMark m; // in case methods get printed via the debugger | |
2463 tty->print_cr("relocations:"); | |
2464 RelocIterator iter(this); | |
2465 iter.print(); | |
2466 if (UseRelocIndex) { | |
2467 jint* index_end = (jint*)relocation_end() - 1; | |
2468 jint index_size = *index_end; | |
2469 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2470 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2471 if (index_size > 0) { | |
2472 jint* ip; | |
2473 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2474 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2475 ip[0], | |
2476 ip[1], | |
2477 header_end()+ip[0], | |
2478 relocation_begin()-1+ip[1]); | |
2479 for (; ip < index_end; ip++) | |
2480 tty->print_cr(" (%d ?)", ip[0]); | |
2481 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2482 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2483 } | |
2484 } | |
2485 } | |
2486 | |
2487 | |
2488 void nmethod::print_pcs() { | |
2489 ResourceMark m; // in case methods get printed via debugger | |
2490 tty->print_cr("pc-bytecode offsets:"); | |
2491 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2492 p->print(this); | |
2493 } | |
2494 } | |
2495 | |
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2496 #endif // PRODUCT |
0 | 2497 |
2498 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2499 RelocIterator iter(this, begin, end); | |
2500 bool have_one = false; | |
2501 while (iter.next()) { | |
2502 have_one = true; | |
2503 switch (iter.type()) { | |
2504 case relocInfo::none: return "no_reloc"; | |
2505 case relocInfo::oop_type: { | |
2506 stringStream st; | |
2507 oop_Relocation* r = iter.oop_reloc(); | |
2508 oop obj = r->oop_value(); | |
2509 st.print("oop("); | |
2510 if (obj == NULL) st.print("NULL"); | |
2511 else obj->print_value_on(&st); | |
2512 st.print(")"); | |
2513 return st.as_string(); | |
2514 } | |
2515 case relocInfo::virtual_call_type: return "virtual_call"; | |
2516 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2517 case relocInfo::static_call_type: return "static_call"; | |
2518 case relocInfo::static_stub_type: return "static_stub"; | |
2519 case relocInfo::runtime_call_type: return "runtime_call"; | |
2520 case relocInfo::external_word_type: return "external_word"; | |
2521 case relocInfo::internal_word_type: return "internal_word"; | |
2522 case relocInfo::section_word_type: return "section_word"; | |
2523 case relocInfo::poll_type: return "poll"; | |
2524 case relocInfo::poll_return_type: return "poll_return"; | |
2525 case relocInfo::type_mask: return "type_bit_mask"; | |
2526 } | |
2527 } | |
2528 return have_one ? "other" : NULL; | |
2529 } | |
2530 | |
2531 // Return a the last scope in (begin..end] | |
2532 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2533 PcDesc* p = pc_desc_near(begin+1); | |
2534 if (p != NULL && p->real_pc(this) <= end) { | |
2535 return new ScopeDesc(this, p->scope_decode_offset(), | |
3018
5857923e563c
Fixed an issue with frame states in exception dispatch chains (now we are correctly rethrowing the exception immediately at entering the interpreter).
Thomas Wuerthinger <thomas@wuerthinger.net>
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2891
diff
changeset
|
2536 p->obj_decode_offset(), p->should_reexecute(), p->rethrow_exception(), |
1253
f70b0d9ab095
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changeset
|
2537 p->return_oop()); |
0 | 2538 } |
2539 return NULL; | |
2540 } | |
2541 | |
1155
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diff
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|
2542 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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jrose
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diff
changeset
|
2543 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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jrose
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diff
changeset
|
2544 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2545 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2546 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2547 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2548 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2549 if (has_method_handle_invokes()) |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2550 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2551 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2552 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
twisti
parents:
1644
diff
changeset
|
2553 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2554 if (block_begin == entry_point()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2555 methodHandle m = method(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2556 if (m.not_null()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2557 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2558 m->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2559 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2560 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2561 if (m.not_null() && !is_osr_method()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2562 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2563 int sizeargs = m->size_of_parameters(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2564 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2565 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2566 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2567 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2568 if (!m->is_static()) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2569 sig_bt[sig_index++] = T_OBJECT; // 'this' |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2570 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2571 BasicType t = ss.type(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2572 sig_bt[sig_index++] = t; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2573 if (type2size[t] == 2) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2574 sig_bt[sig_index++] = T_VOID; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2575 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2576 assert(type2size[t] == 1, "size is 1 or 2"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2577 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2578 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2579 assert(sig_index == sizeargs, ""); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2580 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2581 const char* spname = "sp"; // make arch-specific? |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2582 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2583 int stack_slot_offset = this->frame_size() * wordSize; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2584 int tab1 = 14, tab2 = 24; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2585 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2586 int arg_index = (m->is_static() ? 0 : -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2587 bool did_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2588 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2589 bool at_this = (arg_index == -1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2590 bool at_old_sp = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2591 BasicType t = (at_this ? T_OBJECT : ss.type()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2592 assert(t == sig_bt[sig_index], "sigs in sync"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2593 if (at_this) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2594 stream->print(" # this: "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2595 else |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2596 stream->print(" # parm%d: ", arg_index); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2597 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2598 VMReg fst = regs[sig_index].first(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2599 VMReg snd = regs[sig_index].second(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2600 if (fst->is_reg()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2601 stream->print("%s", fst->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2602 if (snd->is_valid()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2603 stream->print(":%s", snd->name()); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2604 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2605 } else if (fst->is_stack()) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2606 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2607 if (offset == stack_slot_offset) at_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2608 stream->print("[%s+0x%x]", spname, offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2609 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2610 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2611 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2612 stream->print(" "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2613 stream->move_to(tab2); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2614 stream->print("= "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2615 if (at_this) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2616 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2617 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2618 bool did_name = false; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2619 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2620 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2621 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2622 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2623 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2624 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2625 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2626 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2627 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2628 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2629 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2630 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2631 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2632 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2633 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2634 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2635 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2636 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2637 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2638 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2639 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2640 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2641 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2642 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2643 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2644 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2645 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2646 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2647 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2648 |
0 | 2649 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2650 // First, find an oopmap in (begin, end]. | |
2651 // We use the odd half-closed interval so that oop maps and scope descs | |
2652 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2653 address base = code_begin(); |
0 | 2654 OopMapSet* oms = oop_maps(); |
2655 if (oms != NULL) { | |
2656 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2657 OopMap* om = oms->at(i); | |
2658 address pc = base + om->offset(); | |
2659 if (pc > begin) { | |
2660 if (pc <= end) { | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2661 st->move_to(column); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2662 st->print("; "); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2663 om->print_on(st); |
0 | 2664 } |
2665 break; | |
2666 } | |
2667 } | |
2668 } | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2669 |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2670 // Print any debug info present at this pc. |
0 | 2671 ScopeDesc* sd = scope_desc_in(begin, end); |
2672 if (sd != NULL) { | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2673 st->move_to(column); |
0 | 2674 if (sd->bci() == SynchronizationEntryBCI) { |
2675 st->print(";*synchronization entry"); | |
2676 } else { | |
2677 if (sd->method().is_null()) { | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2678 st->print("method is NULL"); |
0 | 2679 } else if (sd->method()->is_native()) { |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2680 st->print("method is native"); |
0 | 2681 } else { |
2142 | 2682 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2683 st->print(";*%s", Bytecodes::name(bc)); |
2684 switch (bc) { | |
2685 case Bytecodes::_invokevirtual: | |
2686 case Bytecodes::_invokespecial: | |
2687 case Bytecodes::_invokestatic: | |
2688 case Bytecodes::_invokeinterface: | |
2689 { | |
2142 | 2690 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2691 st->print(" "); |
2142 | 2692 if (invoke.name() != NULL) |
2693 invoke.name()->print_symbol_on(st); | |
0 | 2694 else |
2695 st->print("<UNKNOWN>"); | |
2696 break; | |
2697 } | |
2698 case Bytecodes::_getfield: | |
2699 case Bytecodes::_putfield: | |
2700 case Bytecodes::_getstatic: | |
2701 case Bytecodes::_putstatic: | |
2702 { | |
2142 | 2703 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2704 st->print(" "); |
2142 | 2705 if (field.name() != NULL) |
2706 field.name()->print_symbol_on(st); | |
0 | 2707 else |
2708 st->print("<UNKNOWN>"); | |
2709 } | |
2710 } | |
2711 } | |
2712 } | |
100
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2713 |
0 | 2714 // Print all scopes |
2715 for (;sd != NULL; sd = sd->sender()) { | |
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2716 st->move_to(column); |
0 | 2717 st->print("; -"); |
2718 if (sd->method().is_null()) { | |
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2719 st->print("method is NULL"); |
0 | 2720 } else { |
2721 sd->method()->print_short_name(st); | |
2722 } | |
2723 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2724 if (lineno != -1) { | |
2725 st->print("@%d (line %d)", sd->bci(), lineno); | |
2726 } else { | |
2727 st->print("@%d", sd->bci()); | |
2728 } | |
2729 st->cr(); | |
2730 } | |
2731 } | |
2732 | |
2733 // Print relocation information | |
2734 const char* str = reloc_string_for(begin, end); | |
2735 if (str != NULL) { | |
2736 if (sd != NULL) st->cr(); | |
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2737 st->move_to(column); |
0 | 2738 st->print("; {%s}", str); |
2739 } | |
1748 | 2740 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2741 if (cont_offset != 0) { |
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2742 st->move_to(column); |
1748 | 2743 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2744 } |
2745 | |
2746 } | |
2747 | |
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2748 #ifndef PRODUCT |
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2749 |
0 | 2750 void nmethod::print_value_on(outputStream* st) const { |
2405
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2751 st->print("nmethod"); |
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2752 print_on(st, NULL); |
0 | 2753 } |
2754 | |
2755 void nmethod::print_calls(outputStream* st) { | |
2756 RelocIterator iter(this); | |
2757 while (iter.next()) { | |
2758 switch (iter.type()) { | |
2759 case relocInfo::virtual_call_type: | |
2760 case relocInfo::opt_virtual_call_type: { | |
2761 VerifyMutexLocker mc(CompiledIC_lock); | |
2762 CompiledIC_at(iter.reloc())->print(); | |
2763 break; | |
2764 } | |
2765 case relocInfo::static_call_type: | |
2766 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2767 compiledStaticCall_at(iter.reloc())->print(); | |
2768 break; | |
2769 } | |
2770 } | |
2771 } | |
2772 | |
2773 void nmethod::print_handler_table() { | |
2774 ExceptionHandlerTable(this).print(); | |
2775 } | |
2776 | |
2777 void nmethod::print_nul_chk_table() { | |
1748 | 2778 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2779 } |
2780 | |
2781 void nmethod::print_statistics() { | |
2782 ttyLocker ttyl; | |
2783 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2784 nmethod_stats.print_native_nmethod_stats(); | |
2785 nmethod_stats.print_nmethod_stats(); | |
2786 DebugInformationRecorder::print_statistics(); | |
2787 nmethod_stats.print_pc_stats(); | |
2788 Dependencies::print_statistics(); | |
2789 if (xtty != NULL) xtty->tail("statistics"); | |
2790 } | |
2791 | |
2792 #endif // PRODUCT |