Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.cpp @ 2195:bf8517f4e4d0
6766644: Redefinition of compiled method fails with assertion "Can not load classes with the Compiler thread"
Summary: Defer posting events from the compiler thread: use service thread
Reviewed-by: coleenp, dholmes, never, dcubed
author | kamg |
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date | Wed, 02 Feb 2011 14:38:01 -0500 |
parents | 3582bf76420e |
children | 0cd39a385a72 1b4e6a5d98e0 |
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" | |
31 #include "compiler/compileLog.hpp" | |
32 #include "compiler/compilerOracle.hpp" | |
33 #include "compiler/disassembler.hpp" | |
34 #include "interpreter/bytecode.hpp" | |
35 #include "oops/methodDataOop.hpp" | |
36 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
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37 #include "prims/jvmtiImpl.hpp" |
1972 | 38 #include "runtime/sharedRuntime.hpp" |
39 #include "runtime/sweeper.hpp" | |
40 #include "utilities/dtrace.hpp" | |
41 #include "utilities/events.hpp" | |
42 #include "utilities/xmlstream.hpp" | |
43 #ifdef SHARK | |
44 #include "shark/sharkCompiler.hpp" | |
45 #endif | |
0 | 46 |
47 #ifdef DTRACE_ENABLED | |
48 | |
49 // Only bother with this argument setup if dtrace is available | |
50 | |
51 HS_DTRACE_PROBE_DECL8(hotspot, compiled__method__load, | |
52 const char*, int, const char*, int, const char*, int, void*, size_t); | |
53 | |
54 HS_DTRACE_PROBE_DECL6(hotspot, compiled__method__unload, | |
55 char*, int, char*, int, char*, int); | |
56 | |
57 #define DTRACE_METHOD_UNLOAD_PROBE(method) \ | |
58 { \ | |
59 methodOop m = (method); \ | |
60 if (m != NULL) { \ | |
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61 Symbol* klass_name = m->klass_name(); \ |
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62 Symbol* name = m->name(); \ |
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63 Symbol* signature = m->signature(); \ |
0 | 64 HS_DTRACE_PROBE6(hotspot, compiled__method__unload, \ |
65 klass_name->bytes(), klass_name->utf8_length(), \ | |
66 name->bytes(), name->utf8_length(), \ | |
67 signature->bytes(), signature->utf8_length()); \ | |
68 } \ | |
69 } | |
70 | |
71 #else // ndef DTRACE_ENABLED | |
72 | |
73 #define DTRACE_METHOD_UNLOAD_PROBE(method) | |
74 | |
75 #endif | |
76 | |
77 bool nmethod::is_compiled_by_c1() const { | |
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78 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 79 if (is_native_method()) return false; |
80 return compiler()->is_c1(); | |
81 } | |
82 bool nmethod::is_compiled_by_c2() const { | |
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83 if (compiler() == NULL || method() == NULL) return false; // can happen during debug printing |
0 | 84 if (is_native_method()) return false; |
85 return compiler()->is_c2(); | |
86 } | |
1692 | 87 bool nmethod::is_compiled_by_shark() const { |
88 if (is_native_method()) return false; | |
89 assert(compiler() != NULL, "must be"); | |
90 return compiler()->is_shark(); | |
91 } | |
0 | 92 |
93 | |
94 | |
95 //--------------------------------------------------------------------------------- | |
96 // NMethod statistics | |
97 // They are printed under various flags, including: | |
98 // PrintC1Statistics, PrintOptoStatistics, LogVMOutput, and LogCompilation. | |
99 // (In the latter two cases, they like other stats are printed to the log only.) | |
100 | |
101 #ifndef PRODUCT | |
102 // These variables are put into one block to reduce relocations | |
103 // and make it simpler to print from the debugger. | |
104 static | |
105 struct nmethod_stats_struct { | |
106 int nmethod_count; | |
107 int total_size; | |
108 int relocation_size; | |
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109 int consts_size; |
1748 | 110 int insts_size; |
0 | 111 int stub_size; |
112 int scopes_data_size; | |
113 int scopes_pcs_size; | |
114 int dependencies_size; | |
115 int handler_table_size; | |
116 int nul_chk_table_size; | |
117 int oops_size; | |
118 | |
119 void note_nmethod(nmethod* nm) { | |
120 nmethod_count += 1; | |
121 total_size += nm->size(); | |
122 relocation_size += nm->relocation_size(); | |
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123 consts_size += nm->consts_size(); |
1748 | 124 insts_size += nm->insts_size(); |
0 | 125 stub_size += nm->stub_size(); |
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126 oops_size += nm->oops_size(); |
0 | 127 scopes_data_size += nm->scopes_data_size(); |
128 scopes_pcs_size += nm->scopes_pcs_size(); | |
129 dependencies_size += nm->dependencies_size(); | |
130 handler_table_size += nm->handler_table_size(); | |
131 nul_chk_table_size += nm->nul_chk_table_size(); | |
132 } | |
133 void print_nmethod_stats() { | |
134 if (nmethod_count == 0) return; | |
135 tty->print_cr("Statistics for %d bytecoded nmethods:", nmethod_count); | |
136 if (total_size != 0) tty->print_cr(" total in heap = %d", total_size); | |
137 if (relocation_size != 0) tty->print_cr(" relocation = %d", relocation_size); | |
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138 if (consts_size != 0) tty->print_cr(" constants = %d", consts_size); |
1748 | 139 if (insts_size != 0) tty->print_cr(" main code = %d", insts_size); |
0 | 140 if (stub_size != 0) tty->print_cr(" stub code = %d", stub_size); |
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141 if (oops_size != 0) tty->print_cr(" oops = %d", oops_size); |
0 | 142 if (scopes_data_size != 0) tty->print_cr(" scopes data = %d", scopes_data_size); |
143 if (scopes_pcs_size != 0) tty->print_cr(" scopes pcs = %d", scopes_pcs_size); | |
144 if (dependencies_size != 0) tty->print_cr(" dependencies = %d", dependencies_size); | |
145 if (handler_table_size != 0) tty->print_cr(" handler table = %d", handler_table_size); | |
146 if (nul_chk_table_size != 0) tty->print_cr(" nul chk table = %d", nul_chk_table_size); | |
147 } | |
148 | |
149 int native_nmethod_count; | |
150 int native_total_size; | |
151 int native_relocation_size; | |
1748 | 152 int native_insts_size; |
0 | 153 int native_oops_size; |
154 void note_native_nmethod(nmethod* nm) { | |
155 native_nmethod_count += 1; | |
156 native_total_size += nm->size(); | |
157 native_relocation_size += nm->relocation_size(); | |
1748 | 158 native_insts_size += nm->insts_size(); |
0 | 159 native_oops_size += nm->oops_size(); |
160 } | |
161 void print_native_nmethod_stats() { | |
162 if (native_nmethod_count == 0) return; | |
163 tty->print_cr("Statistics for %d native nmethods:", native_nmethod_count); | |
164 if (native_total_size != 0) tty->print_cr(" N. total size = %d", native_total_size); | |
165 if (native_relocation_size != 0) tty->print_cr(" N. relocation = %d", native_relocation_size); | |
1748 | 166 if (native_insts_size != 0) tty->print_cr(" N. main code = %d", native_insts_size); |
0 | 167 if (native_oops_size != 0) tty->print_cr(" N. oops = %d", native_oops_size); |
168 } | |
169 | |
170 int pc_desc_resets; // number of resets (= number of caches) | |
171 int pc_desc_queries; // queries to nmethod::find_pc_desc | |
172 int pc_desc_approx; // number of those which have approximate true | |
173 int pc_desc_repeats; // number of _last_pc_desc hits | |
174 int pc_desc_hits; // number of LRU cache hits | |
175 int pc_desc_tests; // total number of PcDesc examinations | |
176 int pc_desc_searches; // total number of quasi-binary search steps | |
177 int pc_desc_adds; // number of LUR cache insertions | |
178 | |
179 void print_pc_stats() { | |
180 tty->print_cr("PcDesc Statistics: %d queries, %.2f comparisons per query", | |
181 pc_desc_queries, | |
182 (double)(pc_desc_tests + pc_desc_searches) | |
183 / pc_desc_queries); | |
184 tty->print_cr(" caches=%d queries=%d/%d, hits=%d+%d, tests=%d+%d, adds=%d", | |
185 pc_desc_resets, | |
186 pc_desc_queries, pc_desc_approx, | |
187 pc_desc_repeats, pc_desc_hits, | |
188 pc_desc_tests, pc_desc_searches, pc_desc_adds); | |
189 } | |
190 } nmethod_stats; | |
191 #endif //PRODUCT | |
192 | |
193 //--------------------------------------------------------------------------------- | |
194 | |
195 | |
196 // The _unwind_handler is a special marker address, which says that | |
197 // for given exception oop and address, the frame should be removed | |
198 // as the tuple cannot be caught in the nmethod | |
199 address ExceptionCache::_unwind_handler = (address) -1; | |
200 | |
201 | |
202 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
203 assert(pc != NULL, "Must be non null"); | |
204 assert(exception.not_null(), "Must be non null"); | |
205 assert(handler != NULL, "Must be non null"); | |
206 | |
207 _count = 0; | |
208 _exception_type = exception->klass(); | |
209 _next = NULL; | |
210 | |
211 add_address_and_handler(pc,handler); | |
212 } | |
213 | |
214 | |
215 address ExceptionCache::match(Handle exception, address pc) { | |
216 assert(pc != NULL,"Must be non null"); | |
217 assert(exception.not_null(),"Must be non null"); | |
218 if (exception->klass() == exception_type()) { | |
219 return (test_address(pc)); | |
220 } | |
221 | |
222 return NULL; | |
223 } | |
224 | |
225 | |
226 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
227 assert(exception.not_null(),"Must be non null"); | |
228 if (exception->klass() == exception_type() && count() < cache_size) { | |
229 return true; | |
230 } | |
231 return false; | |
232 } | |
233 | |
234 | |
235 address ExceptionCache::test_address(address addr) { | |
236 for (int i=0; i<count(); i++) { | |
237 if (pc_at(i) == addr) { | |
238 return handler_at(i); | |
239 } | |
240 } | |
241 return NULL; | |
242 } | |
243 | |
244 | |
245 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
246 if (test_address(addr) == handler) return true; | |
247 if (count() < cache_size) { | |
248 set_pc_at(count(),addr); | |
249 set_handler_at(count(), handler); | |
250 increment_count(); | |
251 return true; | |
252 } | |
253 return false; | |
254 } | |
255 | |
256 | |
257 // private method for handling exception cache | |
258 // These methods are private, and used to manipulate the exception cache | |
259 // directly. | |
260 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
261 ExceptionCache* ec = exception_cache(); | |
262 while (ec != NULL) { | |
263 if (ec->match_exception_with_space(exception)) { | |
264 return ec; | |
265 } | |
266 ec = ec->next(); | |
267 } | |
268 return NULL; | |
269 } | |
270 | |
271 | |
272 //----------------------------------------------------------------------------- | |
273 | |
274 | |
275 // Helper used by both find_pc_desc methods. | |
276 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
277 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
278 if (!approximate) | |
279 return pc->pc_offset() == pc_offset; | |
280 else | |
281 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
282 } | |
283 | |
284 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
285 if (initial_pc_desc == NULL) { | |
286 _last_pc_desc = NULL; // native method | |
287 return; | |
288 } | |
289 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
290 // reset the cache by filling it with benign (non-null) values | |
291 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
292 _last_pc_desc = initial_pc_desc + 1; // first valid one is after sentinel | |
293 for (int i = 0; i < cache_size; i++) | |
294 _pc_descs[i] = initial_pc_desc; | |
295 } | |
296 | |
297 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
298 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
299 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); | |
300 | |
301 // In order to prevent race conditions do not load cache elements | |
302 // repeatedly, but use a local copy: | |
303 PcDesc* res; | |
304 | |
305 // Step one: Check the most recently returned value. | |
306 res = _last_pc_desc; | |
307 if (res == NULL) return NULL; // native method; no PcDescs at all | |
308 if (match_desc(res, pc_offset, approximate)) { | |
309 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
310 return res; | |
311 } | |
312 | |
313 // Step two: Check the LRU cache. | |
314 for (int i = 0; i < cache_size; i++) { | |
315 res = _pc_descs[i]; | |
316 if (res->pc_offset() < 0) break; // optimization: skip empty cache | |
317 if (match_desc(res, pc_offset, approximate)) { | |
318 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
319 _last_pc_desc = res; // record this cache hit in case of repeat | |
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); | |
330 // Update the LRU cache by shifting pc_desc forward: | |
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 // Note: Do not update _last_pc_desc. It fronts for the LRU cache. | |
337 } | |
338 | |
339 // adjust pcs_size so that it is a multiple of both oopSize and | |
340 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
341 // of oopSize, then 2*sizeof(PcDesc) is) | |
342 static int adjust_pcs_size(int pcs_size) { | |
343 int nsize = round_to(pcs_size, oopSize); | |
344 if ((nsize % sizeof(PcDesc)) != 0) { | |
345 nsize = pcs_size + sizeof(PcDesc); | |
346 } | |
347 assert((nsize % oopSize) == 0, "correct alignment"); | |
348 return nsize; | |
349 } | |
350 | |
351 //----------------------------------------------------------------------------- | |
352 | |
353 | |
354 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
355 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
356 assert(new_entry != NULL,"Must be non null"); | |
357 assert(new_entry->next() == NULL, "Must be null"); | |
358 | |
359 if (exception_cache() != NULL) { | |
360 new_entry->set_next(exception_cache()); | |
361 } | |
362 set_exception_cache(new_entry); | |
363 } | |
364 | |
365 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
366 ExceptionCache* prev = NULL; | |
367 ExceptionCache* curr = exception_cache(); | |
368 assert(curr != NULL, "nothing to remove"); | |
369 // find the previous and next entry of ec | |
370 while (curr != ec) { | |
371 prev = curr; | |
372 curr = curr->next(); | |
373 assert(curr != NULL, "ExceptionCache not found"); | |
374 } | |
375 // now: curr == ec | |
376 ExceptionCache* next = curr->next(); | |
377 if (prev == NULL) { | |
378 set_exception_cache(next); | |
379 } else { | |
380 prev->set_next(next); | |
381 } | |
382 delete curr; | |
383 } | |
384 | |
385 | |
386 // public method for accessing the exception cache | |
387 // These are the public access methods. | |
388 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
389 // We never grab a lock to read the exception cache, so we may | |
390 // have false negatives. This is okay, as it can only happen during | |
391 // the first few exception lookups for a given nmethod. | |
392 ExceptionCache* ec = exception_cache(); | |
393 while (ec != NULL) { | |
394 address ret_val; | |
395 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
396 return ret_val; | |
397 } | |
398 ec = ec->next(); | |
399 } | |
400 return NULL; | |
401 } | |
402 | |
403 | |
404 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
405 // There are potential race conditions during exception cache updates, so we | |
406 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 407 // we don't lock during reads, it is possible to have several threads attempt |
0 | 408 // to update the cache with the same data. We need to check for already inserted |
409 // copies of the current data before adding it. | |
410 | |
411 MutexLocker ml(ExceptionCache_lock); | |
412 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
413 | |
414 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
415 target_entry = new ExceptionCache(exception,pc,handler); | |
416 add_exception_cache_entry(target_entry); | |
417 } | |
418 } | |
419 | |
420 | |
421 //-------------end of code for ExceptionCache-------------- | |
422 | |
423 | |
424 int nmethod::total_size() const { | |
425 return | |
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426 consts_size() + |
1748 | 427 insts_size() + |
0 | 428 stub_size() + |
429 scopes_data_size() + | |
430 scopes_pcs_size() + | |
431 handler_table_size() + | |
432 nul_chk_table_size(); | |
433 } | |
434 | |
435 const char* nmethod::compile_kind() const { | |
436 if (is_osr_method()) return "osr"; | |
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437 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 438 return NULL; |
439 } | |
440 | |
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441 // Fill in default values for various flag fields |
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442 void nmethod::init_defaults() { |
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443 _state = alive; |
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444 _marked_for_reclamation = 0; |
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445 _has_flushed_dependencies = 0; |
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446 _speculatively_disconnected = 0; |
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447 _has_unsafe_access = 0; |
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448 _has_method_handle_invokes = 0; |
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449 _marked_for_deoptimization = 0; |
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450 _lock_count = 0; |
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451 _stack_traversal_mark = 0; |
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452 _unload_reported = false; // jvmti state |
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453 |
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454 NOT_PRODUCT(_has_debug_info = false); |
1726 | 455 #ifdef ASSERT |
456 _oops_are_stale = false; | |
457 #endif | |
458 | |
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459 _oops_do_mark_link = NULL; |
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460 _jmethod_id = NULL; |
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461 _osr_link = NULL; |
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462 _scavenge_root_link = NULL; |
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463 _scavenge_root_state = 0; |
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464 _saved_nmethod_link = NULL; |
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465 _compiler = NULL; |
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466 |
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467 #ifdef HAVE_DTRACE_H |
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468 _trap_offset = 0; |
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469 #endif // def HAVE_DTRACE_H |
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470 } |
0 | 471 |
472 | |
473 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
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) | |
490 nmethod(method(), native_nmethod_size, &offsets, | |
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, | |
615 CodeOffsets* offsets, | |
616 CodeBuffer* code_buffer, | |
617 int frame_size, | |
618 ByteSize basic_lock_owner_sp_offset, | |
619 ByteSize basic_lock_sp_offset, | |
620 OopMapSet* oop_maps ) | |
621 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
622 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 623 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
624 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 625 { |
626 { | |
627 debug_only(No_Safepoint_Verifier nsv;) | |
628 assert_locked_or_safepoint(CodeCache_lock); | |
629 | |
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630 init_defaults(); |
0 | 631 _method = method; |
632 _entry_bci = InvocationEntryBci; | |
633 // We have no exception handler or deopt handler make the | |
634 // values something that will never match a pc like the nmethod vtable entry | |
635 _exception_offset = 0; | |
636 _deoptimize_offset = 0; | |
1204 | 637 _deoptimize_mh_offset = 0; |
0 | 638 _orig_pc_offset = 0; |
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639 |
1748 | 640 _consts_offset = data_offset(); |
0 | 641 _stub_offset = data_offset(); |
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642 _oops_offset = data_offset(); |
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643 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 644 _scopes_pcs_offset = _scopes_data_offset; |
645 _dependencies_offset = _scopes_pcs_offset; | |
646 _handler_table_offset = _dependencies_offset; | |
647 _nul_chk_table_offset = _handler_table_offset; | |
648 _nmethod_end_offset = _nul_chk_table_offset; | |
649 _compile_id = 0; // default | |
650 _comp_level = CompLevel_none; | |
1748 | 651 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
652 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 653 _osr_entry_point = NULL; |
654 _exception_cache = NULL; | |
655 _pc_desc_cache.reset_to(NULL); | |
656 | |
657 code_buffer->copy_oops_to(this); | |
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658 debug_only(verify_scavenge_root_oops()); |
0 | 659 CodeCache::commit(this); |
660 } | |
661 | |
662 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
663 ttyLocker ttyl; // keep the following output all in one block | |
664 // This output goes directly to the tty, not the compiler log. | |
665 // To enable tools to match it up with the compilation activity, | |
666 // be sure to tag this tty output with the compile ID. | |
667 if (xtty != NULL) { | |
668 xtty->begin_head("print_native_nmethod"); | |
669 xtty->method(_method); | |
670 xtty->stamp(); | |
671 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
672 } | |
673 // print the header part first | |
674 print(); | |
675 // then print the requested information | |
676 if (PrintNativeNMethods) { | |
677 print_code(); | |
678 oop_maps->print(); | |
679 } | |
680 if (PrintRelocations) { | |
681 print_relocations(); | |
682 } | |
683 if (xtty != NULL) { | |
684 xtty->tail("print_native_nmethod"); | |
685 } | |
686 } | |
687 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
688 } | |
689 | |
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690 // For dtrace wrappers |
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691 #ifdef HAVE_DTRACE_H |
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692 nmethod::nmethod( |
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693 methodOop method, |
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694 int nmethod_size, |
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695 CodeOffsets* offsets, |
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696 CodeBuffer* code_buffer, |
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697 int frame_size) |
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698 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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699 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 700 _native_receiver_sp_offset(in_ByteSize(-1)), |
701 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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702 { |
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703 { |
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704 debug_only(No_Safepoint_Verifier nsv;) |
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705 assert_locked_or_safepoint(CodeCache_lock); |
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706 |
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707 init_defaults(); |
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708 _method = method; |
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709 _entry_bci = InvocationEntryBci; |
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710 // We have no exception handler or deopt handler make the |
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711 // values something that will never match a pc like the nmethod vtable entry |
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712 _exception_offset = 0; |
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713 _deoptimize_offset = 0; |
1204 | 714 _deoptimize_mh_offset = 0; |
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715 _unwind_handler_offset = -1; |
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716 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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717 _orig_pc_offset = 0; |
1748 | 718 _consts_offset = data_offset(); |
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719 _stub_offset = data_offset(); |
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720 _oops_offset = data_offset(); |
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721 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
116
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722 _scopes_pcs_offset = _scopes_data_offset; |
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723 _dependencies_offset = _scopes_pcs_offset; |
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724 _handler_table_offset = _dependencies_offset; |
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725 _nul_chk_table_offset = _handler_table_offset; |
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726 _nmethod_end_offset = _nul_chk_table_offset; |
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727 _compile_id = 0; // default |
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728 _comp_level = CompLevel_none; |
1748 | 729 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
730 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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731 _osr_entry_point = NULL; |
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732 _exception_cache = NULL; |
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733 _pc_desc_cache.reset_to(NULL); |
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734 |
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735 code_buffer->copy_oops_to(this); |
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736 debug_only(verify_scavenge_root_oops()); |
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737 CodeCache::commit(this); |
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738 } |
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739 |
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740 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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741 ttyLocker ttyl; // keep the following output all in one block |
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742 // This output goes directly to the tty, not the compiler log. |
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743 // To enable tools to match it up with the compilation activity, |
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744 // be sure to tag this tty output with the compile ID. |
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745 if (xtty != NULL) { |
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746 xtty->begin_head("print_dtrace_nmethod"); |
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747 xtty->method(_method); |
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748 xtty->stamp(); |
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749 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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750 } |
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751 // print the header part first |
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752 print(); |
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753 // then print the requested information |
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754 if (PrintNMethods) { |
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755 print_code(); |
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756 } |
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757 if (PrintRelocations) { |
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758 print_relocations(); |
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759 } |
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760 if (xtty != NULL) { |
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761 xtty->tail("print_dtrace_nmethod"); |
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762 } |
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763 } |
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764 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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765 } |
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766 #endif // def HAVE_DTRACE_H |
0 | 767 |
768 void* nmethod::operator new(size_t size, int nmethod_size) { | |
769 // Always leave some room in the CodeCache for I2C/C2I adapters | |
770 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) return NULL; | |
771 return CodeCache::allocate(nmethod_size); | |
772 } | |
773 | |
774 | |
775 nmethod::nmethod( | |
776 methodOop method, | |
777 int nmethod_size, | |
778 int compile_id, | |
779 int entry_bci, | |
780 CodeOffsets* offsets, | |
781 int orig_pc_offset, | |
782 DebugInformationRecorder* debug_info, | |
783 Dependencies* dependencies, | |
784 CodeBuffer *code_buffer, | |
785 int frame_size, | |
786 OopMapSet* oop_maps, | |
787 ExceptionHandlerTable* handler_table, | |
788 ImplicitExceptionTable* nul_chk_table, | |
789 AbstractCompiler* compiler, | |
790 int comp_level | |
791 ) | |
792 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
793 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 794 _native_receiver_sp_offset(in_ByteSize(-1)), |
795 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 796 { |
797 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
798 { | |
799 debug_only(No_Safepoint_Verifier nsv;) | |
800 assert_locked_or_safepoint(CodeCache_lock); | |
801 | |
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802 init_defaults(); |
0 | 803 _method = method; |
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804 _entry_bci = entry_bci; |
0 | 805 _compile_id = compile_id; |
806 _comp_level = comp_level; | |
807 _compiler = compiler; | |
808 _orig_pc_offset = orig_pc_offset; | |
1748 | 809 |
810 // Section offsets | |
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811 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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812 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 813 |
814 // Exception handler and deopt handler are in the stub section | |
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815 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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816 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 817 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
818 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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819 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
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820 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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821 } else { |
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822 _deoptimize_mh_offset = -1; |
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823 } |
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824 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 825 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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826 } else { |
1748 | 827 _unwind_handler_offset = -1; |
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828 } |
1748 | 829 |
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830 _oops_offset = data_offset(); |
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831 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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832 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 833 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
834 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
835 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
836 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
837 | |
1748 | 838 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
839 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
840 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 841 _exception_cache = NULL; |
842 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
843 | |
844 // Copy contents of ScopeDescRecorder to nmethod | |
845 code_buffer->copy_oops_to(this); | |
846 debug_info->copy_to(this); | |
847 dependencies->copy_to(this); | |
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848 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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849 CodeCache::add_scavenge_root_nmethod(this); |
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850 } |
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851 debug_only(verify_scavenge_root_oops()); |
0 | 852 |
853 CodeCache::commit(this); | |
854 | |
855 // Copy contents of ExceptionHandlerTable to nmethod | |
856 handler_table->copy_to(this); | |
857 nul_chk_table->copy_to(this); | |
858 | |
859 // we use the information of entry points to find out if a method is | |
860 // static or non static | |
861 assert(compiler->is_c2() || | |
862 _method->is_static() == (entry_point() == _verified_entry_point), | |
863 " entry points must be same for static methods and vice versa"); | |
864 } | |
865 | |
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866 bool printnmethods = PrintNMethods |
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867 || CompilerOracle::should_print(_method) |
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868 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 869 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
870 print_nmethod(printnmethods); | |
871 } | |
872 | |
873 // Note: Do not verify in here as the CodeCache_lock is | |
874 // taken which would conflict with the CompiledIC_lock | |
875 // which taken during the verification of call sites. | |
876 // (was bug - gri 10/25/99) | |
877 | |
878 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
879 } | |
880 | |
881 | |
882 // Print a short set of xml attributes to identify this nmethod. The | |
883 // output should be embedded in some other element. | |
884 void nmethod::log_identity(xmlStream* log) const { | |
885 log->print(" compile_id='%d'", compile_id()); | |
886 const char* nm_kind = compile_kind(); | |
887 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
888 if (compiler() != NULL) { | |
889 log->print(" compiler='%s'", compiler()->name()); | |
890 } | |
1783 | 891 if (TieredCompilation) { |
892 log->print(" level='%d'", comp_level()); | |
893 } | |
0 | 894 } |
895 | |
896 | |
897 #define LOG_OFFSET(log, name) \ | |
898 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
899 log->print(" " XSTR(name) "_offset='%d'" , \ | |
900 (intptr_t)name##_begin() - (intptr_t)this) | |
901 | |
902 | |
903 void nmethod::log_new_nmethod() const { | |
904 if (LogCompilation && xtty != NULL) { | |
905 ttyLocker ttyl; | |
906 HandleMark hm; | |
907 xtty->begin_elem("nmethod"); | |
908 log_identity(xtty); | |
1748 | 909 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 910 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
911 | |
912 LOG_OFFSET(xtty, relocation); | |
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913 LOG_OFFSET(xtty, consts); |
1748 | 914 LOG_OFFSET(xtty, insts); |
0 | 915 LOG_OFFSET(xtty, stub); |
916 LOG_OFFSET(xtty, scopes_data); | |
917 LOG_OFFSET(xtty, scopes_pcs); | |
918 LOG_OFFSET(xtty, dependencies); | |
919 LOG_OFFSET(xtty, handler_table); | |
920 LOG_OFFSET(xtty, nul_chk_table); | |
921 LOG_OFFSET(xtty, oops); | |
922 | |
923 xtty->method(method()); | |
924 xtty->stamp(); | |
925 xtty->end_elem(); | |
926 } | |
927 } | |
928 | |
929 #undef LOG_OFFSET | |
930 | |
931 | |
1783 | 932 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
933 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
934 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
935 int code_size = -1; | |
936 if (method != NULL) { | |
937 is_synchronized = method->is_synchronized(); | |
938 has_xhandler = method->has_exception_handler(); | |
939 is_native = method->is_native(); | |
940 code_size = method->code_size(); | |
941 } | |
942 // print compilation number | |
943 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
944 | |
945 // print method attributes | |
946 const bool is_osr = bci != InvocationEntryBci; | |
947 const char blocking_char = is_blocking ? 'b' : ' '; | |
948 const char compile_type = is_osr ? '%' : ' '; | |
949 const char sync_char = is_synchronized ? 's' : ' '; | |
950 const char exception_char = has_xhandler ? '!' : ' '; | |
951 const char native_char = is_native ? 'n' : ' '; | |
952 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
953 if (TieredCompilation) { | |
954 st->print("%d ", comp_level); | |
955 } | |
956 | |
957 // print optional title | |
958 bool do_nl = false; | |
959 if (title != NULL) { | |
960 int tlen = (int) strlen(title); | |
961 bool do_nl = false; | |
962 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
963 st->print("%.*s", tlen, title); | |
964 } else { | |
965 do_nl = true; | |
966 } | |
967 | |
968 // print method name string if given | |
969 if (method_name != NULL) { | |
970 st->print(method_name); | |
971 } else { | |
972 // otherwise as the method to print itself | |
973 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
974 method->print_short_name(st); | |
975 } else { | |
976 st->print("(method)"); | |
977 } | |
978 } | |
979 | |
980 if (method != NULL) { | |
981 // print osr_bci if any | |
982 if (is_osr) st->print(" @ %d", bci); | |
983 // print method size | |
984 st->print(" (%d bytes)", code_size); | |
985 } | |
986 if (do_nl) st->cr(); | |
987 } | |
988 | |
0 | 989 // Print out more verbose output usually for a newly created nmethod. |
990 void nmethod::print_on(outputStream* st, const char* title) const { | |
991 if (st != NULL) { | |
992 ttyLocker ttyl; | |
1783 | 993 print_compilation(st, /*method_name*/NULL, title, |
994 method(), /*is_blocking*/false, | |
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995 compile_id(), |
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996 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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997 comp_level()); |
0 | 998 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
999 } | |
1000 } | |
1001 | |
1002 | |
1003 void nmethod::print_nmethod(bool printmethod) { | |
1004 ttyLocker ttyl; // keep the following output all in one block | |
1005 if (xtty != NULL) { | |
1006 xtty->begin_head("print_nmethod"); | |
1007 xtty->stamp(); | |
1008 xtty->end_head(); | |
1009 } | |
1010 // print the header part first | |
1011 print(); | |
1012 // then print the requested information | |
1013 if (printmethod) { | |
1014 print_code(); | |
1015 print_pcs(); | |
1016 oop_maps()->print(); | |
1017 } | |
1018 if (PrintDebugInfo) { | |
1019 print_scopes(); | |
1020 } | |
1021 if (PrintRelocations) { | |
1022 print_relocations(); | |
1023 } | |
1024 if (PrintDependencies) { | |
1025 print_dependencies(); | |
1026 } | |
1027 if (PrintExceptionHandlers) { | |
1028 print_handler_table(); | |
1029 print_nul_chk_table(); | |
1030 } | |
1031 if (xtty != NULL) { | |
1032 xtty->tail("print_nmethod"); | |
1033 } | |
1034 } | |
1035 | |
1036 | |
1563
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1037 // Promote one word from an assembly-time handle to a live embedded oop. |
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1038 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1039 if (handle == NULL || |
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1040 // As a special case, IC oops are initialized to 1 or -1. |
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1041 handle == (jobject) Universe::non_oop_word()) { |
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1042 (*dest) = (oop) handle; |
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1043 } else { |
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1044 (*dest) = JNIHandles::resolve_non_null(handle); |
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1045 } |
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1046 } |
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1047 |
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1048 |
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1049 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1050 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1051 int length = array->length(); |
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1052 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1053 oop* dest = oops_begin(); |
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1054 for (int index = 0 ; index < length; index++) { |
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1055 initialize_immediate_oop(&dest[index], array->at(index)); |
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1056 } |
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1057 |
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1058 // Now we can fix up all the oops in the code. We need to do this |
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1059 // in the code because the assembler uses jobjects as placeholders. |
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1060 // The code and relocations have already been initialized by the |
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1061 // CodeBlob constructor, so it is valid even at this early point to |
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1062 // iterate over relocations and patch the code. |
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1063 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1064 } |
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1065 |
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1066 |
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1067 bool nmethod::is_at_poll_return(address pc) { |
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1068 RelocIterator iter(this, pc, pc+1); |
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1069 while (iter.next()) { |
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1070 if (iter.type() == relocInfo::poll_return_type) |
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1071 return true; |
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1072 } |
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1073 return false; |
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1074 } |
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1075 |
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1076 |
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1077 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1078 RelocIterator iter(this, pc, pc+1); |
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1079 while (iter.next()) { |
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1080 relocInfo::relocType t = iter.type(); |
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1081 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1082 return true; |
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1083 } |
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1084 return false; |
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1085 } |
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1086 |
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1087 |
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1088 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1089 // re-patch all oop-bearing instructions, just in case some oops moved |
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1090 RelocIterator iter(this, begin, end); |
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1091 while (iter.next()) { |
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1092 if (iter.type() == relocInfo::oop_type) { |
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1093 oop_Relocation* reloc = iter.oop_reloc(); |
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1094 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1095 oop* dest = reloc->oop_addr(); |
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1096 initialize_immediate_oop(dest, (jobject) *dest); |
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1097 } |
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1098 // Refresh the oop-related bits of this instruction. |
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1099 reloc->fix_oop_relocation(); |
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1100 } |
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1101 |
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1102 // There must not be any interfering patches or breakpoints. |
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1103 assert(!(iter.type() == relocInfo::breakpoint_type |
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1104 && iter.breakpoint_reloc()->active()), |
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1105 "no active breakpoint"); |
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1106 } |
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1107 } |
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1108 |
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1109 |
0 | 1110 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1111 PcDesc* pd = pc_desc_at(pc); | |
1112 guarantee(pd != NULL, "scope must be present"); | |
1113 return new ScopeDesc(this, pd->scope_decode_offset(), | |
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1114 pd->obj_decode_offset(), pd->should_reexecute(), |
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1115 pd->return_oop()); |
0 | 1116 } |
1117 | |
1118 | |
1119 void nmethod::clear_inline_caches() { | |
1120 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1121 if (is_zombie()) { | |
1122 return; | |
1123 } | |
1124 | |
1125 RelocIterator iter(this); | |
1126 while (iter.next()) { | |
1127 iter.reloc()->clear_inline_cache(); | |
1128 } | |
1129 } | |
1130 | |
1131 | |
1132 void nmethod::cleanup_inline_caches() { | |
1133 | |
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1134 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1135 |
1136 // If the method is not entrant or zombie then a JMP is plastered over the | |
1137 // first few bytes. If an oop in the old code was there, that oop | |
1138 // should not get GC'd. Skip the first few bytes of oops on | |
1139 // not-entrant methods. | |
1140 address low_boundary = verified_entry_point(); | |
1141 if (!is_in_use()) { | |
1142 low_boundary += NativeJump::instruction_size; | |
1143 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1144 // This means that the low_boundary is going to be a little too high. | |
1145 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1146 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1147 } | |
1148 | |
1149 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1150 ResourceMark rm; | |
1151 RelocIterator iter(this, low_boundary); | |
1152 while(iter.next()) { | |
1153 switch(iter.type()) { | |
1154 case relocInfo::virtual_call_type: | |
1155 case relocInfo::opt_virtual_call_type: { | |
1156 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1157 // Ok, to lookup references to zombies here | |
1158 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1159 if( cb != NULL && cb->is_nmethod() ) { | |
1160 nmethod* nm = (nmethod*)cb; | |
1161 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1162 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1163 } |
1164 break; | |
1165 } | |
1166 case relocInfo::static_call_type: { | |
1167 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1168 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1169 if( cb != NULL && cb->is_nmethod() ) { | |
1170 nmethod* nm = (nmethod*)cb; | |
1171 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1172 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1173 } |
1174 break; | |
1175 } | |
1176 } | |
1177 } | |
1178 } | |
1179 | |
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1180 // This is a private interface with the sweeper. |
0 | 1181 void nmethod::mark_as_seen_on_stack() { |
1182 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1183 // Set the traversal mark to ensure that the sweeper does 2 |
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1184 // cleaning passes before moving to zombie. |
0 | 1185 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1186 } | |
1187 | |
1188 // Tell if a non-entrant method can be converted to a zombie (i.e., there is no activations on the stack) | |
1189 bool nmethod::can_not_entrant_be_converted() { | |
1190 assert(is_not_entrant(), "must be a non-entrant method"); | |
1191 | |
1192 // Since the nmethod sweeper only does partial sweep the sweeper's traversal | |
1193 // count can be greater than the stack traversal count before it hits the | |
1194 // nmethod for the second time. | |
1195 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count(); | |
1196 } | |
1197 | |
1198 void nmethod::inc_decompile_count() { | |
1783 | 1199 if (!is_compiled_by_c2()) return; |
0 | 1200 // Could be gated by ProfileTraps, but do not bother... |
1201 methodOop m = method(); | |
1202 if (m == NULL) return; | |
1203 methodDataOop mdo = m->method_data(); | |
1204 if (mdo == NULL) return; | |
1205 // There is a benign race here. See comments in methodDataOop.hpp. | |
1206 mdo->inc_decompile_count(); | |
1207 } | |
1208 | |
1209 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1210 | |
1211 post_compiled_method_unload(); | |
1212 | |
1213 // Since this nmethod is being unloaded, make sure that dependencies | |
1214 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1215 // indicate that this work is being done during a GC. | |
1216 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1217 assert(is_alive != NULL, "Should be non-NULL"); | |
1218 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1219 flush_dependencies(is_alive); | |
1220 | |
1221 // Break cycle between nmethod & method | |
1222 if (TraceClassUnloading && WizardMode) { | |
1223 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1224 " unloadable], methodOop(" INTPTR_FORMAT | |
1225 "), cause(" INTPTR_FORMAT ")", | |
1226 this, (address)_method, (address)cause); | |
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1227 if (!Universe::heap()->is_gc_active()) |
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1228 cause->klass()->print(); |
0 | 1229 } |
941 | 1230 // Unlink the osr method, so we do not look this up again |
1231 if (is_osr_method()) { | |
1232 invalidate_osr_method(); | |
1233 } | |
0 | 1234 // If _method is already NULL the methodOop is about to be unloaded, |
1235 // so we don't have to break the cycle. Note that it is possible to | |
1236 // have the methodOop live here, in case we unload the nmethod because | |
1237 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1238 if (_method != NULL) { | |
1239 // OSR methods point to the methodOop, but the methodOop does not | |
1240 // point back! | |
1241 if (_method->code() == this) { | |
1242 _method->clear_code(); // Break a cycle | |
1243 } | |
1244 _method = NULL; // Clear the method of this dead nmethod | |
1245 } | |
1246 // Make the class unloaded - i.e., change state and notify sweeper | |
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1247 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1248 if (is_in_use()) { |
1249 // Transitioning directly from live to unloaded -- so | |
1250 // we need to force a cache clean-up; remember this | |
1251 // for later on. | |
1252 CodeCache::set_needs_cache_clean(true); | |
1253 } | |
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1254 _state = unloaded; |
0 | 1255 |
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1256 // Log the unloading. |
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1257 log_state_change(); |
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1258 |
0 | 1259 // The methodOop is gone at this point |
1260 assert(_method == NULL, "Tautology"); | |
1261 | |
989
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1262 set_osr_link(NULL); |
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1263 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1264 NMethodSweeper::notify(this); |
1265 } | |
1266 | |
1267 void nmethod::invalidate_osr_method() { | |
1268 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1269 // Remove from list of active nmethods | |
1270 if (method() != NULL) | |
1271 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1272 // Set entry as invalid | |
1273 _entry_bci = InvalidOSREntryBci; | |
1274 } | |
1275 | |
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1276 void nmethod::log_state_change() const { |
0 | 1277 if (LogCompilation) { |
1278 if (xtty != NULL) { | |
1279 ttyLocker ttyl; // keep the following output all in one block | |
1644
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1280 if (_state == unloaded) { |
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1281 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1282 os::current_thread_id()); |
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1283 } else { |
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1284 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1285 os::current_thread_id(), |
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1286 (_state == zombie ? " zombie='1'" : "")); |
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1287 } |
0 | 1288 log_identity(xtty); |
1289 xtty->stamp(); | |
1290 xtty->end_elem(); | |
1291 } | |
1292 } | |
1644
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1293 if (PrintCompilation && _state != unloaded) { |
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1294 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1295 tty->cr(); |
1296 } | |
1297 } | |
1298 | |
1299 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1300 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1301 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
1302 | |
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1303 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1304 nmethodLocker nml(this); |
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1305 methodHandle the_method(method()); |
1726 | 1306 No_Safepoint_Verifier nsv; |
0 | 1307 |
1308 { | |
1206
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1309 // If the method is already zombie there is nothing to do |
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1310 if (is_zombie()) { |
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1311 return false; |
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1312 } |
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1313 |
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1314 // invalidate osr nmethod before acquiring the patching lock since |
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1315 // they both acquire leaf locks and we don't want a deadlock. |
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1316 // This logic is equivalent to the logic below for patching the |
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1317 // verified entry point of regular methods. |
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1318 if (is_osr_method()) { |
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1319 // this effectively makes the osr nmethod not entrant |
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1320 invalidate_osr_method(); |
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1321 } |
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1322 |
0 | 1323 // Enter critical section. Does not block for safepoint. |
1324 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1325 |
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1326 if (_state == state) { |
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1327 // another thread already performed this transition so nothing |
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1328 // to do, but return false to indicate this. |
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1329 return false; |
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1330 } |
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1331 |
0 | 1332 // The caller can be calling the method statically or through an inline |
1333 // cache call. | |
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1334 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1335 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1336 SharedRuntime::get_handle_wrong_method_stub()); | |
1337 } | |
1338 | |
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1339 if (is_in_use()) { |
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1340 // It's a true state change, so mark the method as decompiled. |
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1341 // Do it only for transition from alive. |
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1342 inc_decompile_count(); |
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1343 } |
1206
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1344 |
0 | 1345 // Change state |
1644
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1346 _state = state; |
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1347 |
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1348 // Log the transition once |
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1349 log_state_change(); |
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1350 |
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1351 // Remove nmethod from method. |
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1352 // We need to check if both the _code and _from_compiled_code_entry_point |
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1353 // refer to this nmethod because there is a race in setting these two fields |
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1354 // in methodOop as seen in bugid 4947125. |
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1355 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1356 // could be flushed and the compiler and vtable stubs could still call |
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1357 // through it. |
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1358 if (method() != NULL && (method()->code() == this || |
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1359 method()->from_compiled_entry() == verified_entry_point())) { |
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1360 HandleMark hm; |
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1361 method()->clear_code(); |
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1362 } |
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1363 |
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1364 if (state == not_entrant) { |
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1365 mark_as_seen_on_stack(); |
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1366 } |
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1367 |
0 | 1368 } // leave critical region under Patching_lock |
1369 | |
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1370 // When the nmethod becomes zombie it is no longer alive so the |
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1371 // dependencies must be flushed. nmethods in the not_entrant |
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1372 // state will be flushed later when the transition to zombie |
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1373 // happens or they get unloaded. |
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1374 if (state == zombie) { |
1726 | 1375 { |
1376 // Flushing dependecies must be done before any possible | |
1377 // safepoint can sneak in, otherwise the oops used by the | |
1378 // dependency logic could have become stale. | |
1379 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1380 flush_dependencies(NULL); | |
1381 } | |
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1382 |
1726 | 1383 { |
1384 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload event | |
1385 // and it hasn't already been reported for this nmethod then report it now. | |
1386 // (the event may have been reported earilier if the GC marked it for unloading). | |
1387 Pause_No_Safepoint_Verifier pnsv(&nsv); | |
1388 post_compiled_method_unload(); | |
1389 } | |
1390 | |
1391 #ifdef ASSERT | |
1392 // It's no longer safe to access the oops section since zombie | |
1393 // nmethods aren't scanned for GC. | |
1394 _oops_are_stale = true; | |
1395 #endif | |
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1396 } else { |
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1397 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1398 } |
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1399 |
0 | 1400 if (TraceCreateZombies) { |
1401 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1402 } | |
1403 | |
1404 // Make sweeper aware that there is a zombie method that needs to be removed | |
1405 NMethodSweeper::notify(this); | |
1406 | |
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1407 return true; |
0 | 1408 } |
1409 | |
1410 void nmethod::flush() { | |
1411 // Note that there are no valid oops in the nmethod anymore. | |
1412 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1413 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1414 | |
1415 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1416 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1417 |
1418 // completely deallocate this method | |
1419 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1420 if (PrintMethodFlushing) { | |
1202 | 1421 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1422 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1423 } |
1424 | |
1425 // We need to deallocate any ExceptionCache data. | |
1426 // Note that we do not need to grab the nmethod lock for this, it | |
1427 // better be thread safe if we're disposing of it! | |
1428 ExceptionCache* ec = exception_cache(); | |
1429 set_exception_cache(NULL); | |
1430 while(ec != NULL) { | |
1431 ExceptionCache* next = ec->next(); | |
1432 delete ec; | |
1433 ec = next; | |
1434 } | |
1435 | |
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1436 if (on_scavenge_root_list()) { |
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1437 CodeCache::drop_scavenge_root_nmethod(this); |
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1438 } |
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1439 |
1202 | 1440 if (is_speculatively_disconnected()) { |
1441 CodeCache::remove_saved_code(this); | |
1442 } | |
1443 | |
1692 | 1444 #ifdef SHARK |
1845
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1445 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1446 #endif // SHARK |
1447 | |
0 | 1448 ((CodeBlob*)(this))->flush(); |
1449 | |
1450 CodeCache::free(this); | |
1451 } | |
1452 | |
1453 | |
1454 // | |
1455 // Notify all classes this nmethod is dependent on that it is no | |
1456 // longer dependent. This should only be called in two situations. | |
1457 // First, when a nmethod transitions to a zombie all dependents need | |
1458 // to be clear. Since zombification happens at a safepoint there's no | |
1459 // synchronization issues. The second place is a little more tricky. | |
1460 // During phase 1 of mark sweep class unloading may happen and as a | |
1461 // result some nmethods may get unloaded. In this case the flushing | |
1462 // of dependencies must happen during phase 1 since after GC any | |
1463 // dependencies in the unloaded nmethod won't be updated, so | |
1464 // traversing the dependency information in unsafe. In that case this | |
1465 // function is called with a non-NULL argument and this function only | |
1466 // notifies instanceKlasses that are reachable | |
1467 | |
1468 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1469 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1470 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1471 "is_alive is non-NULL if and only if we are called during GC"); | |
1472 if (!has_flushed_dependencies()) { | |
1473 set_has_flushed_dependencies(); | |
1474 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1475 klassOop klass = deps.context_type(); | |
1476 if (klass == NULL) continue; // ignore things like evol_method | |
1477 | |
1478 // During GC the is_alive closure is non-NULL, and is used to | |
1479 // determine liveness of dependees that need to be updated. | |
1480 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1481 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1482 } | |
1483 } | |
1484 } | |
1485 } | |
1486 | |
1487 | |
1488 // If this oop is not live, the nmethod can be unloaded. | |
1489 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1490 OopClosure* keep_alive, | |
1491 oop* root, bool unloading_occurred) { | |
1492 assert(root != NULL, "just checking"); | |
1493 oop obj = *root; | |
1494 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1495 return false; | |
1496 } | |
1497 if (obj->is_compiledICHolder()) { | |
1498 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1499 if (is_alive->do_object_b( | |
1500 cichk_oop->holder_method()->method_holder()) && | |
1501 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1502 // The oop should be kept alive | |
1503 keep_alive->do_oop(root); | |
1504 return false; | |
1505 } | |
1506 } | |
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1507 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1508 // simply because one of its constant oops has gone dead. |
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1509 // No actual classes need to be unloaded in order for this to occur. |
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1510 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1511 make_unloaded(is_alive, obj); |
1512 return true; | |
1513 } | |
1514 | |
1515 // ------------------------------------------------------------------ | |
1516 // post_compiled_method_load_event | |
1517 // new method for install_code() path | |
1518 // Transfer information from compilation to jvmti | |
1519 void nmethod::post_compiled_method_load_event() { | |
1520 | |
1521 methodOop moop = method(); | |
1522 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1523 moop->klass_name()->bytes(), | |
1524 moop->klass_name()->utf8_length(), | |
1525 moop->name()->bytes(), | |
1526 moop->name()->utf8_length(), | |
1527 moop->signature()->bytes(), | |
1528 moop->signature()->utf8_length(), | |
1748 | 1529 insts_begin(), insts_size()); |
0 | 1530 |
1616
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1531 if (JvmtiExport::should_post_compiled_method_load() || |
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1532 JvmtiExport::should_post_compiled_method_unload()) { |
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1533 get_and_cache_jmethod_id(); |
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1534 } |
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1535 |
0 | 1536 if (JvmtiExport::should_post_compiled_method_load()) { |
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1537 // Let the Service thread (which is a real Java thread) post the event |
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1538 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1539 JvmtiDeferredEventQueue::enqueue( |
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1540 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1541 } |
1542 } | |
1543 | |
1616
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1544 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1545 if (_jmethod_id == NULL) { |
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1546 // Cache the jmethod_id since it can no longer be looked up once the |
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1547 // method itself has been marked for unloading. |
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1548 _jmethod_id = method()->jmethod_id(); |
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1549 } |
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1550 return _jmethod_id; |
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1551 } |
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1552 |
0 | 1553 void nmethod::post_compiled_method_unload() { |
1577
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1554 if (unload_reported()) { |
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1555 // During unloading we transition to unloaded and then to zombie |
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1556 // and the unloading is reported during the first transition. |
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1557 return; |
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1558 } |
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1559 |
0 | 1560 assert(_method != NULL && !is_unloaded(), "just checking"); |
1561 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1562 | |
1563 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1564 // post the event. Sometime later this nmethod will be made a zombie |
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1565 // by the sweeper but the methodOop will not be valid at that point. |
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1566 // If the _jmethod_id is null then no load event was ever requested |
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1567 // so don't bother posting the unload. The main reason for this is |
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1568 // that the jmethodID is a weak reference to the methodOop so if |
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1569 // it's being unloaded there's no way to look it up since the weak |
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1570 // ref will have been cleared. |
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1571 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1572 assert(!unload_reported(), "already unloaded"); |
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1573 JvmtiDeferredEvent event = |
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1574 JvmtiDeferredEvent::compiled_method_unload_event( |
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1575 _jmethod_id, insts_begin()); |
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1576 if (SafepointSynchronize::is_at_safepoint()) { |
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1577 // Don't want to take the queueing lock. Add it as pending and |
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1578 // it will get enqueued later. |
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1579 JvmtiDeferredEventQueue::add_pending_event(event); |
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1580 } else { |
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1581 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1582 JvmtiDeferredEventQueue::enqueue(event); |
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1583 } |
0 | 1584 } |
1585 | |
1586 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1587 // any time. As the nmethod is being unloaded now we mark it has | |
1588 // having the unload event reported - this will ensure that we don't | |
1589 // attempt to report the event in the unlikely scenario where the | |
1590 // event is enabled at the time the nmethod is made a zombie. | |
1591 set_unload_reported(); | |
1592 } | |
1593 | |
1594 // This is called at the end of the strong tracing/marking phase of a | |
1595 // GC to unload an nmethod if it contains otherwise unreachable | |
1596 // oops. | |
1597 | |
1598 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1599 OopClosure* keep_alive, bool unloading_occurred) { | |
1600 // Make sure the oop's ready to receive visitors | |
1601 assert(!is_zombie() && !is_unloaded(), | |
1602 "should not call follow on zombie or unloaded nmethod"); | |
1603 | |
1604 // If the method is not entrant then a JMP is plastered over the | |
1605 // first few bytes. If an oop in the old code was there, that oop | |
1606 // should not get GC'd. Skip the first few bytes of oops on | |
1607 // not-entrant methods. | |
1608 address low_boundary = verified_entry_point(); | |
1609 if (is_not_entrant()) { | |
1610 low_boundary += NativeJump::instruction_size; | |
1611 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1612 // (See comment above.) | |
1613 } | |
1614 | |
1615 // The RedefineClasses() API can cause the class unloading invariant | |
1616 // to no longer be true. See jvmtiExport.hpp for details. | |
1617 // Also, leave a debugging breadcrumb in local flag. | |
1618 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1619 if (a_class_was_redefined) { | |
1620 // This set of the unloading_occurred flag is done before the | |
1621 // call to post_compiled_method_unload() so that the unloading | |
1622 // of this nmethod is reported. | |
1623 unloading_occurred = true; | |
1624 } | |
1625 | |
1626 // Follow methodOop | |
1627 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1628 return; | |
1629 } | |
1630 | |
1631 // Exception cache | |
1632 ExceptionCache* ec = exception_cache(); | |
1633 while (ec != NULL) { | |
1634 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1635 oop ex = *ex_addr; | |
1636 ExceptionCache* next_ec = ec->next(); | |
1637 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1638 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1639 remove_from_exception_cache(ec); | |
1640 } | |
1641 ec = next_ec; | |
1642 } | |
1643 | |
1644 // If class unloading occurred we first iterate over all inline caches and | |
1645 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1646 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1647 // iteration below. | |
1648 if (unloading_occurred) { | |
1649 RelocIterator iter(this, low_boundary); | |
1650 while(iter.next()) { | |
1651 if (iter.type() == relocInfo::virtual_call_type) { | |
1652 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1653 oop ic_oop = ic->cached_oop(); | |
1654 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1655 // The only exception is compiledICHolder oops which may | |
1656 // yet be marked below. (We check this further below). | |
1657 if (ic_oop->is_compiledICHolder()) { | |
1658 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1659 if (is_alive->do_object_b( | |
1660 cichk_oop->holder_method()->method_holder()) && | |
1661 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1662 continue; | |
1663 } | |
1664 } | |
1665 ic->set_to_clean(); | |
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1666 assert(ic->cached_oop() == NULL, |
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1667 "cached oop in IC should be cleared"); |
0 | 1668 } |
1669 } | |
1670 } | |
1671 } | |
1672 | |
1673 // Compiled code | |
1674 RelocIterator iter(this, low_boundary); | |
1675 while (iter.next()) { | |
1676 if (iter.type() == relocInfo::oop_type) { | |
1677 oop_Relocation* r = iter.oop_reloc(); | |
1678 // In this loop, we must only traverse those oops directly embedded in | |
1679 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1680 assert(1 == (r->oop_is_immediate()) + | |
1681 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1682 "oop must be found in exactly one place"); | |
1683 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1684 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1685 return; | |
1686 } | |
1687 } | |
1688 } | |
1689 } | |
1690 | |
1691 | |
1692 // Scopes | |
1693 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1694 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1695 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1696 return; | |
1697 } | |
1698 } | |
1699 | |
1700 #ifndef PRODUCT | |
1701 // This nmethod was not unloaded; check below that all CompiledICs | |
1702 // refer to marked oops. | |
1703 { | |
1704 RelocIterator iter(this, low_boundary); | |
1705 while (iter.next()) { | |
1706 if (iter.type() == relocInfo::virtual_call_type) { | |
1707 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1708 oop ic_oop = ic->cached_oop(); | |
1709 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1710 "Found unmarked ic_oop in reachable nmethod"); | |
1711 } | |
1712 } | |
1713 } | |
1714 #endif // !PRODUCT | |
1715 } | |
1716 | |
941 | 1717 // This method is called twice during GC -- once while |
1718 // tracing the "active" nmethods on thread stacks during | |
1719 // the (strong) marking phase, and then again when walking | |
1720 // the code cache contents during the weak roots processing | |
1721 // phase. The two uses are distinguished by means of the | |
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6885169: merge of 4957990 and 6863023 causes conflict on do_nmethods
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1722 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1723 // case. We want to walk the weak roots in the nmethod |
1724 // only in the second case. The weak roots in the nmethod | |
1725 // are the oops in the ExceptionCache and the InlineCache | |
1726 // oops. | |
994
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1727 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1728 // make sure the oops ready to receive visitors |
1729 assert(!is_zombie() && !is_unloaded(), | |
1730 "should not call follow on zombie or unloaded nmethod"); | |
1731 | |
1732 // If the method is not entrant or zombie then a JMP is plastered over the | |
1733 // first few bytes. If an oop in the old code was there, that oop | |
1734 // should not get GC'd. Skip the first few bytes of oops on | |
1735 // not-entrant methods. | |
1736 address low_boundary = verified_entry_point(); | |
1737 if (is_not_entrant()) { | |
1738 low_boundary += NativeJump::instruction_size; | |
1739 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1740 // (See comment above.) | |
1741 } | |
1742 | |
1743 // Compiled code | |
1744 f->do_oop((oop*) &_method); | |
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1745 if (!do_strong_roots_only) { |
941 | 1746 // weak roots processing phase -- update ExceptionCache oops |
1747 ExceptionCache* ec = exception_cache(); | |
1748 while(ec != NULL) { | |
1749 f->do_oop((oop*)ec->exception_type_addr()); | |
1750 ec = ec->next(); | |
1751 } | |
1752 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1753 |
1754 RelocIterator iter(this, low_boundary); | |
941 | 1755 |
0 | 1756 while (iter.next()) { |
1757 if (iter.type() == relocInfo::oop_type ) { | |
1758 oop_Relocation* r = iter.oop_reloc(); | |
1759 // In this loop, we must only follow those oops directly embedded in | |
1760 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1761 assert(1 == (r->oop_is_immediate()) + |
1762 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1763 "oop must be found in exactly one place"); | |
0 | 1764 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1765 f->do_oop(r->oop_addr()); | |
1766 } | |
1767 } | |
1768 } | |
1769 | |
1770 // Scopes | |
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1771 // This includes oop constants not inlined in the code stream. |
0 | 1772 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1773 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1774 f->do_oop(p); | |
1775 } | |
1776 } | |
1777 | |
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1778 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1779 |
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1780 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1781 |
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1782 // An nmethod is "marked" if its _mark_link is set non-null. |
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1783 // Even if it is the end of the linked list, it will have a non-null link value, |
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1784 // as long as it is on the list. |
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1785 // This code must be MP safe, because it is used from parallel GC passes. |
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1786 bool nmethod::test_set_oops_do_mark() { |
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1787 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1788 nmethod* observed_mark_link = _oops_do_mark_link; |
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1789 if (observed_mark_link == NULL) { |
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1790 // Claim this nmethod for this thread to mark. |
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|
1791 observed_mark_link = (nmethod*) |
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1792 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1793 if (observed_mark_link == NULL) { |
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1794 |
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1795 // Atomically append this nmethod (now claimed) to the head of the list: |
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1796 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1797 for (;;) { |
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1798 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1799 _oops_do_mark_link = required_mark_nmethods; |
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1800 observed_mark_nmethods = (nmethod*) |
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1801 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1802 if (observed_mark_nmethods == required_mark_nmethods) |
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1803 break; |
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1804 } |
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1805 // Mark was clear when we first saw this guy. |
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1806 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1807 return false; |
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1808 } |
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1809 } |
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1810 // On fall through, another racing thread marked this nmethod before we did. |
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1811 return true; |
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1812 } |
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1813 |
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1814 void nmethod::oops_do_marking_prologue() { |
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1815 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1816 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1817 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1818 // may fork a bunch of threads, and we need them all to see the same state. |
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1819 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1820 guarantee(observed == NULL, "no races in this sequential code"); |
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1821 } |
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1822 |
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1823 void nmethod::oops_do_marking_epilogue() { |
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1824 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1825 nmethod* cur = _oops_do_mark_nmethods; |
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1826 while (cur != NMETHOD_SENTINEL) { |
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1827 assert(cur != NULL, "not NULL-terminated"); |
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1828 nmethod* next = cur->_oops_do_mark_link; |
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1829 cur->_oops_do_mark_link = NULL; |
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1830 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1831 cur = next; |
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1832 } |
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1833 void* required = _oops_do_mark_nmethods; |
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1834 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1835 guarantee(observed == required, "no races in this sequential code"); |
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1836 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1837 } |
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1838 |
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1839 class DetectScavengeRoot: public OopClosure { |
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1840 bool _detected_scavenge_root; |
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1841 public: |
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1842 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1843 { NOT_PRODUCT(_print_nm = NULL); } |
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1844 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1845 virtual void do_oop(oop* p) { |
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1846 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1847 NOT_PRODUCT(maybe_print(p)); |
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1848 _detected_scavenge_root = true; |
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1849 } |
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1850 } |
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1851 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1852 |
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1853 #ifndef PRODUCT |
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1854 nmethod* _print_nm; |
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1855 void maybe_print(oop* p) { |
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1856 if (_print_nm == NULL) return; |
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1857 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1858 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1859 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1860 (intptr_t)(*p), (intptr_t)p); |
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1861 (*p)->print(); |
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1862 } |
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1863 #endif //PRODUCT |
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1864 }; |
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1865 |
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1866 bool nmethod::detect_scavenge_root_oops() { |
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1867 DetectScavengeRoot detect_scavenge_root; |
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1868 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1869 oops_do(&detect_scavenge_root); |
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1870 return detect_scavenge_root.detected_scavenge_root(); |
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1871 } |
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1872 |
0 | 1873 // Method that knows how to preserve outgoing arguments at call. This method must be |
1874 // called with a frame corresponding to a Java invoke | |
1875 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1876 #ifndef SHARK |
0 | 1877 if (!method()->is_native()) { |
1878 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1879 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1880 bool has_receiver = call.has_receiver(); | |
2177
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1881 Symbol* signature = call.signature(); |
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1882 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1883 } |
1692 | 1884 #endif // !SHARK |
0 | 1885 } |
1886 | |
1887 | |
1888 oop nmethod::embeddedOop_at(u_char* p) { | |
1889 RelocIterator iter(this, p, p + oopSize); | |
1890 while (iter.next()) | |
1891 if (iter.type() == relocInfo::oop_type) { | |
1892 return iter.oop_reloc()->oop_value(); | |
1893 } | |
1894 return NULL; | |
1895 } | |
1896 | |
1897 | |
1898 inline bool includes(void* p, void* from, void* to) { | |
1899 return from <= p && p < to; | |
1900 } | |
1901 | |
1902 | |
1903 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1904 assert(count >= 2, "must be sentinel values, at least"); | |
1905 | |
1906 #ifdef ASSERT | |
1907 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1908 int prev_offset = pcs[0].pc_offset(); | |
1909 assert(prev_offset == PcDesc::lower_offset_limit, | |
1910 "must start with a sentinel"); | |
1911 for (int i = 1; i < count; i++) { | |
1912 int this_offset = pcs[i].pc_offset(); | |
1913 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1914 prev_offset = this_offset; | |
1915 } | |
1916 assert(prev_offset == PcDesc::upper_offset_limit, | |
1917 "must end with a sentinel"); | |
1918 #endif //ASSERT | |
1919 | |
1135
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1920 // Search for MethodHandle invokes and tag the nmethod. |
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1921 for (int i = 0; i < count; i++) { |
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1922 if (pcs[i].is_method_handle_invoke()) { |
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1923 set_has_method_handle_invokes(true); |
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1924 break; |
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1925 } |
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1926 } |
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1927 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1928 |
0 | 1929 int size = count * sizeof(PcDesc); |
1930 assert(scopes_pcs_size() >= size, "oob"); | |
1931 memcpy(scopes_pcs_begin(), pcs, size); | |
1932 | |
1933 // Adjust the final sentinel downward. | |
1934 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1935 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1936 last_pc->set_pc_offset(content_size() + 1); |
0 | 1937 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1938 // Fill any rounding gaps with copies of the last record. | |
1939 last_pc[1] = last_pc[0]; | |
1940 } | |
1941 // The following assert could fail if sizeof(PcDesc) is not | |
1942 // an integral multiple of oopSize (the rounding term). | |
1943 // If it fails, change the logic to always allocate a multiple | |
1944 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1945 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1946 } | |
1947 | |
1948 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1949 assert(scopes_data_size() >= size, "oob"); | |
1950 memcpy(scopes_data_begin(), buffer, size); | |
1951 } | |
1952 | |
1953 | |
1954 #ifdef ASSERT | |
1955 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1956 PcDesc* lower = nm->scopes_pcs_begin(); | |
1957 PcDesc* upper = nm->scopes_pcs_end(); | |
1958 lower += 1; // exclude initial sentinel | |
1959 PcDesc* res = NULL; | |
1960 for (PcDesc* p = lower; p < upper; p++) { | |
1961 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1962 if (match_desc(p, pc_offset, approximate)) { | |
1963 if (res == NULL) | |
1964 res = p; | |
1965 else | |
1966 res = (PcDesc*) badAddress; | |
1967 } | |
1968 } | |
1969 return res; | |
1970 } | |
1971 #endif | |
1972 | |
1973 | |
1974 // Finds a PcDesc with real-pc equal to "pc" | |
1975 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1976 address base_address = code_begin(); |
0 | 1977 if ((pc < base_address) || |
1978 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1979 return NULL; // PC is wildly out of range | |
1980 } | |
1981 int pc_offset = (int) (pc - base_address); | |
1982 | |
1983 // Check the PcDesc cache if it contains the desired PcDesc | |
1984 // (This as an almost 100% hit rate.) | |
1985 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1986 if (res != NULL) { | |
1987 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1988 return res; | |
1989 } | |
1990 | |
1991 // Fallback algorithm: quasi-linear search for the PcDesc | |
1992 // Find the last pc_offset less than the given offset. | |
1993 // The successor must be the required match, if there is a match at all. | |
1994 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1995 PcDesc* lower = scopes_pcs_begin(); | |
1996 PcDesc* upper = scopes_pcs_end(); | |
1997 upper -= 1; // exclude final sentinel | |
1998 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1999 | |
2000 #define assert_LU_OK \ | |
2001 /* invariant on lower..upper during the following search: */ \ | |
2002 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
2003 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2004 assert_LU_OK; | |
2005 | |
2006 // Use the last successful return as a split point. | |
2007 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2008 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2009 if (mid->pc_offset() < pc_offset) { | |
2010 lower = mid; | |
2011 } else { | |
2012 upper = mid; | |
2013 } | |
2014 | |
2015 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2016 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2017 const int RADIX = (1 << LOG2_RADIX); | |
2018 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2019 while ((mid = lower + step) < upper) { | |
2020 assert_LU_OK; | |
2021 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2022 if (mid->pc_offset() < pc_offset) { | |
2023 lower = mid; | |
2024 } else { | |
2025 upper = mid; | |
2026 break; | |
2027 } | |
2028 } | |
2029 assert_LU_OK; | |
2030 } | |
2031 | |
2032 // Sneak up on the value with a linear search of length ~16. | |
2033 while (true) { | |
2034 assert_LU_OK; | |
2035 mid = lower + 1; | |
2036 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2037 if (mid->pc_offset() < pc_offset) { | |
2038 lower = mid; | |
2039 } else { | |
2040 upper = mid; | |
2041 break; | |
2042 } | |
2043 } | |
2044 #undef assert_LU_OK | |
2045 | |
2046 if (match_desc(upper, pc_offset, approximate)) { | |
2047 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2048 _pc_desc_cache.add_pc_desc(upper); | |
2049 return upper; | |
2050 } else { | |
2051 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2052 return NULL; | |
2053 } | |
2054 } | |
2055 | |
2056 | |
2057 bool nmethod::check_all_dependencies() { | |
2058 bool found_check = false; | |
2059 // wholesale check of all dependencies | |
2060 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2061 if (deps.check_dependency() != NULL) { | |
2062 found_check = true; | |
2063 NOT_DEBUG(break); | |
2064 } | |
2065 } | |
2066 return found_check; // tell caller if we found anything | |
2067 } | |
2068 | |
2069 bool nmethod::check_dependency_on(DepChange& changes) { | |
2070 // What has happened: | |
2071 // 1) a new class dependee has been added | |
2072 // 2) dependee and all its super classes have been marked | |
2073 bool found_check = false; // set true if we are upset | |
2074 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2075 // Evaluate only relevant dependencies. | |
2076 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2077 found_check = true; | |
2078 NOT_DEBUG(break); | |
2079 } | |
2080 } | |
2081 return found_check; | |
2082 } | |
2083 | |
2084 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2085 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2086 objArrayOop dependee_methods = dependee_ik->methods(); | |
2087 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2088 if (deps.type() == Dependencies::evol_method) { | |
2089 methodOop method = deps.method_argument(0); | |
2090 for (int j = 0; j < dependee_methods->length(); j++) { | |
2091 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2092 // RC_TRACE macro has an embedded ResourceMark | |
2093 RC_TRACE(0x01000000, | |
2094 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2095 _method->method_holder()->klass_part()->external_name(), | |
2096 _method->name()->as_C_string(), | |
2097 _method->signature()->as_C_string(), compile_id(), | |
2098 method->method_holder()->klass_part()->external_name(), | |
2099 method->name()->as_C_string(), | |
2100 method->signature()->as_C_string())); | |
2101 if (TraceDependencies || LogCompilation) | |
2102 deps.log_dependency(dependee); | |
2103 return true; | |
2104 } | |
2105 } | |
2106 } | |
2107 } | |
2108 return false; | |
2109 } | |
2110 | |
2111 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2112 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2113 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2114 if (deps.type() != Dependencies::evol_method) | |
2115 continue; | |
2116 methodOop method = deps.method_argument(0); | |
2117 if (method == dependee) return true; | |
2118 } | |
2119 return false; | |
2120 } | |
2121 | |
2122 | |
2123 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2124 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2125 if (is_zombie()) { |
2126 // a zombie may never be patched | |
2127 return false; | |
2128 } | |
2129 return true; | |
2130 } | |
2131 | |
2132 | |
2133 address nmethod::continuation_for_implicit_exception(address pc) { | |
2134 // Exception happened outside inline-cache check code => we are inside | |
2135 // an active nmethod => use cpc to determine a return address | |
1748 | 2136 int exception_offset = pc - code_begin(); |
0 | 2137 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2138 #ifdef ASSERT | |
2139 if (cont_offset == 0) { | |
2140 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2141 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2142 HandleMark hm(thread); | |
2143 ResourceMark rm(thread); | |
2144 CodeBlob* cb = CodeCache::find_blob(pc); | |
2145 assert(cb != NULL && cb == this, ""); | |
2146 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2147 print(); | |
2148 method()->print_codes(); | |
2149 print_code(); | |
2150 print_pcs(); | |
2151 } | |
2152 #endif | |
1250 | 2153 if (cont_offset == 0) { |
2154 // Let the normal error handling report the exception | |
2155 return NULL; | |
2156 } | |
1748 | 2157 return code_begin() + cont_offset; |
0 | 2158 } |
2159 | |
2160 | |
2161 | |
2162 void nmethod_init() { | |
2163 // make sure you didn't forget to adjust the filler fields | |
2164 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2165 } | |
2166 | |
2167 | |
2168 //------------------------------------------------------------------------------------------- | |
2169 | |
2170 | |
2171 // QQQ might we make this work from a frame?? | |
2172 nmethodLocker::nmethodLocker(address pc) { | |
2173 CodeBlob* cb = CodeCache::find_blob(pc); | |
2174 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2175 _nm = (nmethod*)cb; | |
2176 lock_nmethod(_nm); | |
2177 } | |
2178 | |
2179 void nmethodLocker::lock_nmethod(nmethod* nm) { | |
2180 if (nm == NULL) return; | |
2181 Atomic::inc(&nm->_lock_count); | |
2182 guarantee(!nm->is_zombie(), "cannot lock a zombie method"); | |
2183 } | |
2184 | |
2185 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2186 if (nm == NULL) return; | |
2187 Atomic::dec(&nm->_lock_count); | |
2188 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2189 } | |
2190 | |
1204 | 2191 |
2192 // ----------------------------------------------------------------------------- | |
2193 // nmethod::get_deopt_original_pc | |
2194 // | |
2195 // Return the original PC for the given PC if: | |
2196 // (a) the given PC belongs to a nmethod and | |
2197 // (b) it is a deopt PC | |
2198 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2199 if (fr->cb() == NULL) return NULL; | |
2200 | |
2201 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2202 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2203 return nm->get_original_pc(fr); | |
2204 | |
2205 return NULL; | |
0 | 2206 } |
2207 | |
2208 | |
2209 // ----------------------------------------------------------------------------- | |
1135
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2210 // MethodHandle |
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2211 |
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2212 bool nmethod::is_method_handle_return(address return_pc) { |
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2213 if (!has_method_handle_invokes()) return false; |
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2214 PcDesc* pd = pc_desc_at(return_pc); |
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2215 if (pd == NULL) |
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2216 return false; |
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2217 return pd->is_method_handle_invoke(); |
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2218 } |
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2219 |
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2220 |
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2221 // ----------------------------------------------------------------------------- |
0 | 2222 // Verification |
2223 | |
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2224 class VerifyOopsClosure: public OopClosure { |
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2225 nmethod* _nm; |
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2226 bool _ok; |
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2227 public: |
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2228 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2229 bool ok() { return _ok; } |
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2230 virtual void do_oop(oop* p) { |
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2231 if ((*p) == NULL || (*p)->is_oop()) return; |
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2232 if (_ok) { |
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2233 _nm->print_nmethod(true); |
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2234 _ok = false; |
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2235 } |
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2236 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2237 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2238 } |
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2239 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2240 }; |
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2241 |
0 | 2242 void nmethod::verify() { |
2243 | |
2244 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2245 // seems odd. | |
2246 | |
2247 if( is_zombie() || is_not_entrant() ) | |
2248 return; | |
2249 | |
2250 // Make sure all the entry points are correctly aligned for patching. | |
2251 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2252 | |
2253 assert(method()->is_oop(), "must be valid"); | |
2254 | |
2255 ResourceMark rm; | |
2256 | |
2257 if (!CodeCache::contains(this)) { | |
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2258 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2259 } |
2260 | |
2261 if(is_native_method() ) | |
2262 return; | |
2263 | |
2264 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2265 if (nm != this) { | |
1490
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2266 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2267 this)); |
0 | 2268 } |
2269 | |
2270 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2271 if (! p->verify(this)) { | |
2272 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2273 } | |
2274 } | |
2275 | |
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2276 VerifyOopsClosure voc(this); |
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2277 oops_do(&voc); |
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2278 assert(voc.ok(), "embedded oops must be OK"); |
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2279 verify_scavenge_root_oops(); |
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2280 |
0 | 2281 verify_scopes(); |
2282 } | |
2283 | |
2284 | |
2285 void nmethod::verify_interrupt_point(address call_site) { | |
2286 // This code does not work in release mode since | |
2287 // owns_lock only is available in debug mode. | |
2288 CompiledIC* ic = NULL; | |
2289 Thread *cur = Thread::current(); | |
2290 if (CompiledIC_lock->owner() == cur || | |
2291 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2292 SafepointSynchronize::is_at_safepoint())) { | |
2293 ic = CompiledIC_at(call_site); | |
2294 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2295 } else { | |
2296 MutexLocker ml_verify (CompiledIC_lock); | |
2297 ic = CompiledIC_at(call_site); | |
2298 } | |
2299 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2300 assert(pd != NULL, "PcDesc must exist"); | |
2301 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2302 pd->obj_decode_offset(), pd->should_reexecute(), |
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2303 pd->return_oop()); |
0 | 2304 !sd->is_top(); sd = sd->sender()) { |
2305 sd->verify(); | |
2306 } | |
2307 } | |
2308 | |
2309 void nmethod::verify_scopes() { | |
2310 if( !method() ) return; // Runtime stubs have no scope | |
2311 if (method()->is_native()) return; // Ignore stub methods. | |
2312 // iterate through all interrupt point | |
2313 // and verify the debug information is valid. | |
2314 RelocIterator iter((nmethod*)this); | |
2315 while (iter.next()) { | |
2316 address stub = NULL; | |
2317 switch (iter.type()) { | |
2318 case relocInfo::virtual_call_type: | |
2319 verify_interrupt_point(iter.addr()); | |
2320 break; | |
2321 case relocInfo::opt_virtual_call_type: | |
2322 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2323 verify_interrupt_point(iter.addr()); | |
2324 break; | |
2325 case relocInfo::static_call_type: | |
2326 stub = iter.static_call_reloc()->static_stub(); | |
2327 //verify_interrupt_point(iter.addr()); | |
2328 break; | |
2329 case relocInfo::runtime_call_type: | |
2330 address destination = iter.reloc()->value(); | |
2331 // Right now there is no way to find out which entries support | |
2332 // an interrupt point. It would be nice if we had this | |
2333 // information in a table. | |
2334 break; | |
2335 } | |
2336 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2337 } | |
2338 } | |
2339 | |
2340 | |
2341 // ----------------------------------------------------------------------------- | |
2342 // Non-product code | |
2343 #ifndef PRODUCT | |
2344 | |
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2345 class DebugScavengeRoot: public OopClosure { |
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2346 nmethod* _nm; |
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2347 bool _ok; |
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2348 public: |
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2349 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2350 bool ok() { return _ok; } |
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2351 virtual void do_oop(oop* p) { |
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2352 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2353 if (_ok) { |
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2354 _nm->print_nmethod(true); |
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2355 _ok = false; |
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2356 } |
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2357 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2358 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2359 (*p)->print(); |
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2360 } |
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2361 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2362 }; |
0 | 2363 |
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2364 void nmethod::verify_scavenge_root_oops() { |
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2365 if (!on_scavenge_root_list()) { |
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2366 // Actually look inside, to verify the claim that it's clean. |
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|
2367 DebugScavengeRoot debug_scavenge_root(this); |
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2368 oops_do(&debug_scavenge_root); |
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2369 if (!debug_scavenge_root.ok()) |
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2370 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2371 } |
989
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2372 assert(scavenge_root_not_marked(), ""); |
0 | 2373 } |
2374 | |
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2375 #endif // PRODUCT |
0 | 2376 |
2377 // Printing operations | |
2378 | |
2379 void nmethod::print() const { | |
2380 ResourceMark rm; | |
2381 ttyLocker ttyl; // keep the following output all in one block | |
2382 | |
2383 tty->print("Compiled "); | |
2384 | |
2385 if (is_compiled_by_c1()) { | |
2386 tty->print("(c1) "); | |
2387 } else if (is_compiled_by_c2()) { | |
2388 tty->print("(c2) "); | |
1692 | 2389 } else if (is_compiled_by_shark()) { |
2390 tty->print("(shark) "); | |
0 | 2391 } else { |
2392 tty->print("(nm) "); | |
2393 } | |
2394 | |
2395 print_on(tty, "nmethod"); | |
2396 tty->cr(); | |
2397 if (WizardMode) { | |
2398 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2399 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2400 tty->print(" { "); | |
2401 if (is_in_use()) tty->print("in_use "); | |
2402 if (is_not_entrant()) tty->print("not_entrant "); | |
2403 if (is_zombie()) tty->print("zombie "); | |
2404 if (is_unloaded()) tty->print("unloaded "); | |
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2405 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2406 tty->print_cr("}:"); |
2407 } | |
2408 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2409 (address)this, | |
2410 (address)this + size(), | |
2411 size()); | |
2412 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2413 relocation_begin(), | |
2414 relocation_end(), | |
2415 relocation_size()); | |
1762
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2416 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2417 consts_begin(), |
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|
2418 consts_end(), |
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|
2419 consts_size()); |
1748 | 2420 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2421 insts_begin(), | |
2422 insts_end(), | |
2423 insts_size()); | |
0 | 2424 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2425 stub_begin(), | |
2426 stub_end(), | |
2427 stub_size()); | |
1563
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2428 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2429 oops_begin(), |
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|
2430 oops_end(), |
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|
2431 oops_size()); |
0 | 2432 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2433 scopes_data_begin(), | |
2434 scopes_data_end(), | |
2435 scopes_data_size()); | |
2436 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2437 scopes_pcs_begin(), | |
2438 scopes_pcs_end(), | |
2439 scopes_pcs_size()); | |
2440 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2441 dependencies_begin(), | |
2442 dependencies_end(), | |
2443 dependencies_size()); | |
2444 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2445 handler_table_begin(), | |
2446 handler_table_end(), | |
2447 handler_table_size()); | |
2448 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2449 nul_chk_table_begin(), | |
2450 nul_chk_table_end(), | |
2451 nul_chk_table_size()); | |
2452 } | |
2453 | |
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2454 void nmethod::print_code() { |
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|
2455 HandleMark hm; |
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|
2456 ResourceMark m; |
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|
2457 Disassembler::decode(this); |
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|
2458 } |
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|
2459 |
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|
2460 |
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|
2461 #ifndef PRODUCT |
0 | 2462 |
2463 void nmethod::print_scopes() { | |
2464 // Find the first pc desc for all scopes in the code and print it. | |
2465 ResourceMark rm; | |
2466 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2467 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2468 continue; | |
2469 | |
2470 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2471 sd->print_on(tty, p); | |
2472 } | |
2473 } | |
2474 | |
2475 void nmethod::print_dependencies() { | |
2476 ResourceMark rm; | |
2477 ttyLocker ttyl; // keep the following output all in one block | |
2478 tty->print_cr("Dependencies:"); | |
2479 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2480 deps.print_dependency(); | |
2481 klassOop ctxk = deps.context_type(); | |
2482 if (ctxk != NULL) { | |
2483 Klass* k = Klass::cast(ctxk); | |
2484 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2485 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2486 } |
2487 } | |
2488 deps.log_dependency(); // put it into the xml log also | |
2489 } | |
2490 } | |
2491 | |
2492 | |
2493 void nmethod::print_relocations() { | |
2494 ResourceMark m; // in case methods get printed via the debugger | |
2495 tty->print_cr("relocations:"); | |
2496 RelocIterator iter(this); | |
2497 iter.print(); | |
2498 if (UseRelocIndex) { | |
2499 jint* index_end = (jint*)relocation_end() - 1; | |
2500 jint index_size = *index_end; | |
2501 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2502 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2503 if (index_size > 0) { | |
2504 jint* ip; | |
2505 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2506 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2507 ip[0], | |
2508 ip[1], | |
2509 header_end()+ip[0], | |
2510 relocation_begin()-1+ip[1]); | |
2511 for (; ip < index_end; ip++) | |
2512 tty->print_cr(" (%d ?)", ip[0]); | |
2513 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2514 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2515 } | |
2516 } | |
2517 } | |
2518 | |
2519 | |
2520 void nmethod::print_pcs() { | |
2521 ResourceMark m; // in case methods get printed via debugger | |
2522 tty->print_cr("pc-bytecode offsets:"); | |
2523 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2524 p->print(this); | |
2525 } | |
2526 } | |
2527 | |
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2528 #endif // PRODUCT |
0 | 2529 |
2530 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2531 RelocIterator iter(this, begin, end); | |
2532 bool have_one = false; | |
2533 while (iter.next()) { | |
2534 have_one = true; | |
2535 switch (iter.type()) { | |
2536 case relocInfo::none: return "no_reloc"; | |
2537 case relocInfo::oop_type: { | |
2538 stringStream st; | |
2539 oop_Relocation* r = iter.oop_reloc(); | |
2540 oop obj = r->oop_value(); | |
2541 st.print("oop("); | |
2542 if (obj == NULL) st.print("NULL"); | |
2543 else obj->print_value_on(&st); | |
2544 st.print(")"); | |
2545 return st.as_string(); | |
2546 } | |
2547 case relocInfo::virtual_call_type: return "virtual_call"; | |
2548 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2549 case relocInfo::static_call_type: return "static_call"; | |
2550 case relocInfo::static_stub_type: return "static_stub"; | |
2551 case relocInfo::runtime_call_type: return "runtime_call"; | |
2552 case relocInfo::external_word_type: return "external_word"; | |
2553 case relocInfo::internal_word_type: return "internal_word"; | |
2554 case relocInfo::section_word_type: return "section_word"; | |
2555 case relocInfo::poll_type: return "poll"; | |
2556 case relocInfo::poll_return_type: return "poll_return"; | |
2557 case relocInfo::type_mask: return "type_bit_mask"; | |
2558 } | |
2559 } | |
2560 return have_one ? "other" : NULL; | |
2561 } | |
2562 | |
2563 // Return a the last scope in (begin..end] | |
2564 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2565 PcDesc* p = pc_desc_near(begin+1); | |
2566 if (p != NULL && p->real_pc(this) <= end) { | |
2567 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2568 p->obj_decode_offset(), p->should_reexecute(), |
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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop")
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diff
changeset
|
2569 p->return_oop()); |
0 | 2570 } |
2571 return NULL; | |
2572 } | |
2573 | |
1155
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|
2574 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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|
2575 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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diff
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|
2576 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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|
2577 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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|
2578 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2579 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
1691
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2580 |
4a665be40fd3
6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2581 if (has_method_handle_invokes()) |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2582 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
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6975855: don't emit deopt MH handler in C1 if not required
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diff
changeset
|
2583 |
1155
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diff
changeset
|
2584 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
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diff
changeset
|
2585 |
1155
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|
2586 if (block_begin == entry_point()) { |
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diff
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|
2587 methodHandle m = method(); |
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|
2588 if (m.not_null()) { |
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diff
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|
2589 stream->print(" # "); |
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diff
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|
2590 m->print_value_on(stream); |
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|
2591 stream->cr(); |
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|
2592 } |
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|
2593 if (m.not_null() && !is_osr_method()) { |
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|
2594 ResourceMark rm; |
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|
2595 int sizeargs = m->size_of_parameters(); |
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|
2596 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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|
2597 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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|
2598 { |
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|
2599 int sig_index = 0; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
2600 if (!m->is_static()) |
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|
2601 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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|
2602 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
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|
2603 BasicType t = ss.type(); |
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|
2604 sig_bt[sig_index++] = t; |
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|
2605 if (type2size[t] == 2) { |
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|
2606 sig_bt[sig_index++] = T_VOID; |
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|
2607 } else { |
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|
2608 assert(type2size[t] == 1, "size is 1 or 2"); |
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|
2609 } |
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|
2610 } |
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|
2611 assert(sig_index == sizeargs, ""); |
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|
2612 } |
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|
2613 const char* spname = "sp"; // make arch-specific? |
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changeset
|
2614 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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|
2615 int stack_slot_offset = this->frame_size() * wordSize; |
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changeset
|
2616 int tab1 = 14, tab2 = 24; |
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diff
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|
2617 int sig_index = 0; |
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|
2618 int arg_index = (m->is_static() ? 0 : -1); |
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changeset
|
2619 bool did_old_sp = false; |
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changeset
|
2620 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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|
2621 bool at_this = (arg_index == -1); |
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2622 bool at_old_sp = false; |
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2623 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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2624 assert(t == sig_bt[sig_index], "sigs in sync"); |
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2625 if (at_this) |
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2626 stream->print(" # this: "); |
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2627 else |
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2628 stream->print(" # parm%d: ", arg_index); |
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2629 stream->move_to(tab1); |
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2630 VMReg fst = regs[sig_index].first(); |
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2631 VMReg snd = regs[sig_index].second(); |
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2632 if (fst->is_reg()) { |
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2633 stream->print("%s", fst->name()); |
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2634 if (snd->is_valid()) { |
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2635 stream->print(":%s", snd->name()); |
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|
2636 } |
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2637 } else if (fst->is_stack()) { |
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2638 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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2639 if (offset == stack_slot_offset) at_old_sp = true; |
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2640 stream->print("[%s+0x%x]", spname, offset); |
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2641 } else { |
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2642 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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2643 } |
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2644 stream->print(" "); |
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2645 stream->move_to(tab2); |
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|
2646 stream->print("= "); |
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|
2647 if (at_this) { |
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2648 m->method_holder()->print_value_on(stream); |
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2649 } else { |
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|
2650 bool did_name = false; |
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2651 if (!at_this && ss.is_object()) { |
2177
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2142
diff
changeset
|
2652 Symbol* name = ss.as_symbol_or_null(); |
1155
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2653 if (name != NULL) { |
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2654 name->print_value_on(stream); |
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|
2655 did_name = true; |
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|
2656 } |
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|
2657 } |
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|
2658 if (!did_name) |
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|
2659 stream->print("%s", type2name(t)); |
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|
2660 } |
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|
2661 if (at_old_sp) { |
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2662 stream->print(" (%s of caller)", spname); |
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|
2663 did_old_sp = true; |
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|
2664 } |
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|
2665 stream->cr(); |
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|
2666 sig_index += type2size[t]; |
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|
2667 arg_index += 1; |
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|
2668 if (!at_this) ss.next(); |
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|
2669 } |
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|
2670 if (!did_old_sp) { |
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diff
changeset
|
2671 stream->print(" # "); |
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|
2672 stream->move_to(tab1); |
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|
2673 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
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|
2674 stream->print(" (%s of caller)", spname); |
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|
2675 stream->cr(); |
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|
2676 } |
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|
2677 } |
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|
2678 } |
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|
2679 } |
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|
2680 |
0 | 2681 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2682 // First, find an oopmap in (begin, end]. | |
2683 // We use the odd half-closed interval so that oop maps and scope descs | |
2684 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2685 address base = code_begin(); |
0 | 2686 OopMapSet* oms = oop_maps(); |
2687 if (oms != NULL) { | |
2688 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2689 OopMap* om = oms->at(i); | |
2690 address pc = base + om->offset(); | |
2691 if (pc > begin) { | |
2692 if (pc <= end) { | |
100
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diff
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|
2693 st->move_to(column); |
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diff
changeset
|
2694 st->print("; "); |
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diff
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|
2695 om->print_on(st); |
0 | 2696 } |
2697 break; | |
2698 } | |
2699 } | |
2700 } | |
100
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diff
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|
2701 |
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diff
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|
2702 // Print any debug info present at this pc. |
0 | 2703 ScopeDesc* sd = scope_desc_in(begin, end); |
2704 if (sd != NULL) { | |
100
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diff
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|
2705 st->move_to(column); |
0 | 2706 if (sd->bci() == SynchronizationEntryBCI) { |
2707 st->print(";*synchronization entry"); | |
2708 } else { | |
2709 if (sd->method().is_null()) { | |
100
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2710 st->print("method is NULL"); |
0 | 2711 } else if (sd->method()->is_native()) { |
100
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2712 st->print("method is native"); |
0 | 2713 } else { |
2142 | 2714 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2715 st->print(";*%s", Bytecodes::name(bc)); |
2716 switch (bc) { | |
2717 case Bytecodes::_invokevirtual: | |
2718 case Bytecodes::_invokespecial: | |
2719 case Bytecodes::_invokestatic: | |
2720 case Bytecodes::_invokeinterface: | |
2721 { | |
2142 | 2722 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2723 st->print(" "); |
2142 | 2724 if (invoke.name() != NULL) |
2725 invoke.name()->print_symbol_on(st); | |
0 | 2726 else |
2727 st->print("<UNKNOWN>"); | |
2728 break; | |
2729 } | |
2730 case Bytecodes::_getfield: | |
2731 case Bytecodes::_putfield: | |
2732 case Bytecodes::_getstatic: | |
2733 case Bytecodes::_putstatic: | |
2734 { | |
2142 | 2735 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2736 st->print(" "); |
2142 | 2737 if (field.name() != NULL) |
2738 field.name()->print_symbol_on(st); | |
0 | 2739 else |
2740 st->print("<UNKNOWN>"); | |
2741 } | |
2742 } | |
2743 } | |
2744 } | |
100
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|
2745 |
0 | 2746 // Print all scopes |
2747 for (;sd != NULL; sd = sd->sender()) { | |
100
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diff
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|
2748 st->move_to(column); |
0 | 2749 st->print("; -"); |
2750 if (sd->method().is_null()) { | |
100
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|
2751 st->print("method is NULL"); |
0 | 2752 } else { |
2753 sd->method()->print_short_name(st); | |
2754 } | |
2755 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2756 if (lineno != -1) { | |
2757 st->print("@%d (line %d)", sd->bci(), lineno); | |
2758 } else { | |
2759 st->print("@%d", sd->bci()); | |
2760 } | |
2761 st->cr(); | |
2762 } | |
2763 } | |
2764 | |
2765 // Print relocation information | |
2766 const char* str = reloc_string_for(begin, end); | |
2767 if (str != NULL) { | |
2768 if (sd != NULL) st->cr(); | |
100
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diff
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|
2769 st->move_to(column); |
0 | 2770 st->print("; {%s}", str); |
2771 } | |
1748 | 2772 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2773 if (cont_offset != 0) { |
100
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|
2774 st->move_to(column); |
1748 | 2775 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2776 } |
2777 | |
2778 } | |
2779 | |
100
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diff
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|
2780 #ifndef PRODUCT |
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|
2781 |
0 | 2782 void nmethod::print_value_on(outputStream* st) const { |
2783 print_on(st, "nmethod"); | |
2784 } | |
2785 | |
2786 void nmethod::print_calls(outputStream* st) { | |
2787 RelocIterator iter(this); | |
2788 while (iter.next()) { | |
2789 switch (iter.type()) { | |
2790 case relocInfo::virtual_call_type: | |
2791 case relocInfo::opt_virtual_call_type: { | |
2792 VerifyMutexLocker mc(CompiledIC_lock); | |
2793 CompiledIC_at(iter.reloc())->print(); | |
2794 break; | |
2795 } | |
2796 case relocInfo::static_call_type: | |
2797 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2798 compiledStaticCall_at(iter.reloc())->print(); | |
2799 break; | |
2800 } | |
2801 } | |
2802 } | |
2803 | |
2804 void nmethod::print_handler_table() { | |
2805 ExceptionHandlerTable(this).print(); | |
2806 } | |
2807 | |
2808 void nmethod::print_nul_chk_table() { | |
1748 | 2809 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2810 } |
2811 | |
2812 void nmethod::print_statistics() { | |
2813 ttyLocker ttyl; | |
2814 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2815 nmethod_stats.print_native_nmethod_stats(); | |
2816 nmethod_stats.print_nmethod_stats(); | |
2817 DebugInformationRecorder::print_statistics(); | |
2818 nmethod_stats.print_pc_stats(); | |
2819 Dependencies::print_statistics(); | |
2820 if (xtty != NULL) xtty->tail("statistics"); | |
2821 } | |
2822 | |
2823 #endif // PRODUCT |