Mercurial > hg > graal-compiler
annotate src/share/vm/code/nmethod.cpp @ 2360:fc5ebbb2d1a8
Merge
author | twisti |
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date | Fri, 18 Mar 2011 01:44:15 -0700 |
parents | 1c0cf339481b 65f880e2869b |
children | d673ef06fe96 |
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 | |
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173 int pc_desc_repeats; // number of _pc_descs[0] hits |
0 | 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 | |
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193 |
0 | 194 //--------------------------------------------------------------------------------- |
195 | |
196 | |
197 ExceptionCache::ExceptionCache(Handle exception, address pc, address handler) { | |
198 assert(pc != NULL, "Must be non null"); | |
199 assert(exception.not_null(), "Must be non null"); | |
200 assert(handler != NULL, "Must be non null"); | |
201 | |
202 _count = 0; | |
203 _exception_type = exception->klass(); | |
204 _next = NULL; | |
205 | |
206 add_address_and_handler(pc,handler); | |
207 } | |
208 | |
209 | |
210 address ExceptionCache::match(Handle exception, address pc) { | |
211 assert(pc != NULL,"Must be non null"); | |
212 assert(exception.not_null(),"Must be non null"); | |
213 if (exception->klass() == exception_type()) { | |
214 return (test_address(pc)); | |
215 } | |
216 | |
217 return NULL; | |
218 } | |
219 | |
220 | |
221 bool ExceptionCache::match_exception_with_space(Handle exception) { | |
222 assert(exception.not_null(),"Must be non null"); | |
223 if (exception->klass() == exception_type() && count() < cache_size) { | |
224 return true; | |
225 } | |
226 return false; | |
227 } | |
228 | |
229 | |
230 address ExceptionCache::test_address(address addr) { | |
231 for (int i=0; i<count(); i++) { | |
232 if (pc_at(i) == addr) { | |
233 return handler_at(i); | |
234 } | |
235 } | |
236 return NULL; | |
237 } | |
238 | |
239 | |
240 bool ExceptionCache::add_address_and_handler(address addr, address handler) { | |
241 if (test_address(addr) == handler) return true; | |
242 if (count() < cache_size) { | |
243 set_pc_at(count(),addr); | |
244 set_handler_at(count(), handler); | |
245 increment_count(); | |
246 return true; | |
247 } | |
248 return false; | |
249 } | |
250 | |
251 | |
252 // private method for handling exception cache | |
253 // These methods are private, and used to manipulate the exception cache | |
254 // directly. | |
255 ExceptionCache* nmethod::exception_cache_entry_for_exception(Handle exception) { | |
256 ExceptionCache* ec = exception_cache(); | |
257 while (ec != NULL) { | |
258 if (ec->match_exception_with_space(exception)) { | |
259 return ec; | |
260 } | |
261 ec = ec->next(); | |
262 } | |
263 return NULL; | |
264 } | |
265 | |
266 | |
267 //----------------------------------------------------------------------------- | |
268 | |
269 | |
270 // Helper used by both find_pc_desc methods. | |
271 static inline bool match_desc(PcDesc* pc, int pc_offset, bool approximate) { | |
272 NOT_PRODUCT(++nmethod_stats.pc_desc_tests); | |
273 if (!approximate) | |
274 return pc->pc_offset() == pc_offset; | |
275 else | |
276 return (pc-1)->pc_offset() < pc_offset && pc_offset <= pc->pc_offset(); | |
277 } | |
278 | |
279 void PcDescCache::reset_to(PcDesc* initial_pc_desc) { | |
280 if (initial_pc_desc == NULL) { | |
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281 _pc_descs[0] = NULL; // native method; no PcDescs at all |
0 | 282 return; |
283 } | |
284 NOT_PRODUCT(++nmethod_stats.pc_desc_resets); | |
285 // reset the cache by filling it with benign (non-null) values | |
286 assert(initial_pc_desc->pc_offset() < 0, "must be sentinel"); | |
287 for (int i = 0; i < cache_size; i++) | |
288 _pc_descs[i] = initial_pc_desc; | |
289 } | |
290 | |
291 PcDesc* PcDescCache::find_pc_desc(int pc_offset, bool approximate) { | |
292 NOT_PRODUCT(++nmethod_stats.pc_desc_queries); | |
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293 NOT_PRODUCT(if (approximate) ++nmethod_stats.pc_desc_approx); |
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294 |
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295 // Note: one might think that caching the most recently |
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296 // read value separately would be a win, but one would be |
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297 // wrong. When many threads are updating it, the cache |
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298 // line it's in would bounce between caches, negating |
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299 // any benefit. |
0 | 300 |
301 // In order to prevent race conditions do not load cache elements | |
302 // repeatedly, but use a local copy: | |
303 PcDesc* res; | |
304 | |
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305 // Step one: Check the most recently added value. |
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306 res = _pc_descs[0]; |
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307 if (res == NULL) return NULL; // native method; no PcDescs at all |
0 | 308 if (match_desc(res, pc_offset, approximate)) { |
309 NOT_PRODUCT(++nmethod_stats.pc_desc_repeats); | |
310 return res; | |
311 } | |
312 | |
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313 // Step two: Check the rest of the LRU cache. |
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314 for (int i = 1; i < cache_size; ++i) { |
0 | 315 res = _pc_descs[i]; |
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316 if (res->pc_offset() < 0) break; // optimization: skip empty cache |
0 | 317 if (match_desc(res, pc_offset, approximate)) { |
318 NOT_PRODUCT(++nmethod_stats.pc_desc_hits); | |
319 return res; | |
320 } | |
321 } | |
322 | |
323 // Report failure. | |
324 return NULL; | |
325 } | |
326 | |
327 void PcDescCache::add_pc_desc(PcDesc* pc_desc) { | |
328 NOT_PRODUCT(++nmethod_stats.pc_desc_adds); | |
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329 // Update the LRU cache by shifting pc_desc forward. |
0 | 330 for (int i = 0; i < cache_size; i++) { |
331 PcDesc* next = _pc_descs[i]; | |
332 _pc_descs[i] = pc_desc; | |
333 pc_desc = next; | |
334 } | |
335 } | |
336 | |
337 // adjust pcs_size so that it is a multiple of both oopSize and | |
338 // sizeof(PcDesc) (assumes that if sizeof(PcDesc) is not a multiple | |
339 // of oopSize, then 2*sizeof(PcDesc) is) | |
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340 static int adjust_pcs_size(int pcs_size) { |
0 | 341 int nsize = round_to(pcs_size, oopSize); |
342 if ((nsize % sizeof(PcDesc)) != 0) { | |
343 nsize = pcs_size + sizeof(PcDesc); | |
344 } | |
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345 assert((nsize % oopSize) == 0, "correct alignment"); |
0 | 346 return nsize; |
347 } | |
348 | |
349 //----------------------------------------------------------------------------- | |
350 | |
351 | |
352 void nmethod::add_exception_cache_entry(ExceptionCache* new_entry) { | |
353 assert(ExceptionCache_lock->owned_by_self(),"Must hold the ExceptionCache_lock"); | |
354 assert(new_entry != NULL,"Must be non null"); | |
355 assert(new_entry->next() == NULL, "Must be null"); | |
356 | |
357 if (exception_cache() != NULL) { | |
358 new_entry->set_next(exception_cache()); | |
359 } | |
360 set_exception_cache(new_entry); | |
361 } | |
362 | |
363 void nmethod::remove_from_exception_cache(ExceptionCache* ec) { | |
364 ExceptionCache* prev = NULL; | |
365 ExceptionCache* curr = exception_cache(); | |
366 assert(curr != NULL, "nothing to remove"); | |
367 // find the previous and next entry of ec | |
368 while (curr != ec) { | |
369 prev = curr; | |
370 curr = curr->next(); | |
371 assert(curr != NULL, "ExceptionCache not found"); | |
372 } | |
373 // now: curr == ec | |
374 ExceptionCache* next = curr->next(); | |
375 if (prev == NULL) { | |
376 set_exception_cache(next); | |
377 } else { | |
378 prev->set_next(next); | |
379 } | |
380 delete curr; | |
381 } | |
382 | |
383 | |
384 // public method for accessing the exception cache | |
385 // These are the public access methods. | |
386 address nmethod::handler_for_exception_and_pc(Handle exception, address pc) { | |
387 // We never grab a lock to read the exception cache, so we may | |
388 // have false negatives. This is okay, as it can only happen during | |
389 // the first few exception lookups for a given nmethod. | |
390 ExceptionCache* ec = exception_cache(); | |
391 while (ec != NULL) { | |
392 address ret_val; | |
393 if ((ret_val = ec->match(exception,pc)) != NULL) { | |
394 return ret_val; | |
395 } | |
396 ec = ec->next(); | |
397 } | |
398 return NULL; | |
399 } | |
400 | |
401 | |
402 void nmethod::add_handler_for_exception_and_pc(Handle exception, address pc, address handler) { | |
403 // There are potential race conditions during exception cache updates, so we | |
404 // must own the ExceptionCache_lock before doing ANY modifications. Because | |
605 | 405 // we don't lock during reads, it is possible to have several threads attempt |
0 | 406 // to update the cache with the same data. We need to check for already inserted |
407 // copies of the current data before adding it. | |
408 | |
409 MutexLocker ml(ExceptionCache_lock); | |
410 ExceptionCache* target_entry = exception_cache_entry_for_exception(exception); | |
411 | |
412 if (target_entry == NULL || !target_entry->add_address_and_handler(pc,handler)) { | |
413 target_entry = new ExceptionCache(exception,pc,handler); | |
414 add_exception_cache_entry(target_entry); | |
415 } | |
416 } | |
417 | |
418 | |
419 //-------------end of code for ExceptionCache-------------- | |
420 | |
421 | |
422 int nmethod::total_size() const { | |
423 return | |
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424 consts_size() + |
1748 | 425 insts_size() + |
0 | 426 stub_size() + |
427 scopes_data_size() + | |
428 scopes_pcs_size() + | |
429 handler_table_size() + | |
430 nul_chk_table_size(); | |
431 } | |
432 | |
433 const char* nmethod::compile_kind() const { | |
434 if (is_osr_method()) return "osr"; | |
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435 if (method() != NULL && is_native_method()) return "c2n"; |
0 | 436 return NULL; |
437 } | |
438 | |
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439 // Fill in default values for various flag fields |
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440 void nmethod::init_defaults() { |
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441 _state = alive; |
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442 _marked_for_reclamation = 0; |
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443 _has_flushed_dependencies = 0; |
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444 _speculatively_disconnected = 0; |
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445 _has_unsafe_access = 0; |
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446 _has_method_handle_invokes = 0; |
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447 _marked_for_deoptimization = 0; |
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448 _lock_count = 0; |
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449 _stack_traversal_mark = 0; |
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450 _unload_reported = false; // jvmti state |
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451 |
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452 NOT_PRODUCT(_has_debug_info = false); |
1726 | 453 #ifdef ASSERT |
454 _oops_are_stale = false; | |
455 #endif | |
456 | |
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457 _oops_do_mark_link = NULL; |
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458 _jmethod_id = NULL; |
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459 _osr_link = NULL; |
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460 _scavenge_root_link = NULL; |
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461 _scavenge_root_state = 0; |
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462 _saved_nmethod_link = NULL; |
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463 _compiler = NULL; |
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464 |
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465 #ifdef HAVE_DTRACE_H |
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466 _trap_offset = 0; |
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467 #endif // def HAVE_DTRACE_H |
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468 } |
0 | 469 |
470 | |
471 nmethod* nmethod::new_native_nmethod(methodHandle method, | |
472 CodeBuffer *code_buffer, | |
473 int vep_offset, | |
474 int frame_complete, | |
475 int frame_size, | |
476 ByteSize basic_lock_owner_sp_offset, | |
477 ByteSize basic_lock_sp_offset, | |
478 OopMapSet* oop_maps) { | |
479 // create nmethod | |
480 nmethod* nm = NULL; | |
481 { | |
482 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
483 int native_nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); | |
484 CodeOffsets offsets; | |
485 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); | |
486 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); | |
487 nm = new (native_nmethod_size) | |
488 nmethod(method(), native_nmethod_size, &offsets, | |
489 code_buffer, frame_size, | |
490 basic_lock_owner_sp_offset, basic_lock_sp_offset, | |
491 oop_maps); | |
492 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_native_nmethod(nm)); | |
493 if (PrintAssembly && nm != NULL) | |
494 Disassembler::decode(nm); | |
495 } | |
496 // verify nmethod | |
497 debug_only(if (nm) nm->verify();) // might block | |
498 | |
499 if (nm != NULL) { | |
500 nm->log_new_nmethod(); | |
501 } | |
502 | |
503 return nm; | |
504 } | |
505 | |
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506 #ifdef HAVE_DTRACE_H |
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507 nmethod* nmethod::new_dtrace_nmethod(methodHandle method, |
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508 CodeBuffer *code_buffer, |
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509 int vep_offset, |
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510 int trap_offset, |
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511 int frame_complete, |
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512 int frame_size) { |
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513 // create nmethod |
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514 nmethod* nm = NULL; |
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515 { |
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516 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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517 int nmethod_size = allocation_size(code_buffer, sizeof(nmethod)); |
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518 CodeOffsets offsets; |
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519 offsets.set_value(CodeOffsets::Verified_Entry, vep_offset); |
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520 offsets.set_value(CodeOffsets::Dtrace_trap, trap_offset); |
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521 offsets.set_value(CodeOffsets::Frame_Complete, frame_complete); |
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522 |
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523 nm = new (nmethod_size) nmethod(method(), nmethod_size, &offsets, code_buffer, frame_size); |
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524 |
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525 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); |
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526 if (PrintAssembly && nm != NULL) |
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527 Disassembler::decode(nm); |
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528 } |
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529 // verify nmethod |
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530 debug_only(if (nm) nm->verify();) // might block |
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531 |
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532 if (nm != NULL) { |
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533 nm->log_new_nmethod(); |
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534 } |
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535 |
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536 return nm; |
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537 } |
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538 |
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539 #endif // def HAVE_DTRACE_H |
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540 |
0 | 541 nmethod* nmethod::new_nmethod(methodHandle method, |
542 int compile_id, | |
543 int entry_bci, | |
544 CodeOffsets* offsets, | |
545 int orig_pc_offset, | |
546 DebugInformationRecorder* debug_info, | |
547 Dependencies* dependencies, | |
548 CodeBuffer* code_buffer, int frame_size, | |
549 OopMapSet* oop_maps, | |
550 ExceptionHandlerTable* handler_table, | |
551 ImplicitExceptionTable* nul_chk_table, | |
552 AbstractCompiler* compiler, | |
553 int comp_level | |
554 ) | |
555 { | |
556 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
557 // create nmethod | |
558 nmethod* nm = NULL; | |
559 { MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
560 int nmethod_size = | |
561 allocation_size(code_buffer, sizeof(nmethod)) | |
562 + adjust_pcs_size(debug_info->pcs_size()) | |
563 + round_to(dependencies->size_in_bytes() , oopSize) | |
564 + round_to(handler_table->size_in_bytes(), oopSize) | |
565 + round_to(nul_chk_table->size_in_bytes(), oopSize) | |
566 + round_to(debug_info->data_size() , oopSize); | |
567 nm = new (nmethod_size) | |
568 nmethod(method(), nmethod_size, compile_id, entry_bci, offsets, | |
569 orig_pc_offset, debug_info, dependencies, code_buffer, frame_size, | |
570 oop_maps, | |
571 handler_table, | |
572 nul_chk_table, | |
573 compiler, | |
574 comp_level); | |
575 if (nm != NULL) { | |
576 // To make dependency checking during class loading fast, record | |
577 // the nmethod dependencies in the classes it is dependent on. | |
578 // This allows the dependency checking code to simply walk the | |
579 // class hierarchy above the loaded class, checking only nmethods | |
580 // which are dependent on those classes. The slow way is to | |
581 // check every nmethod for dependencies which makes it linear in | |
582 // the number of methods compiled. For applications with a lot | |
583 // classes the slow way is too slow. | |
584 for (Dependencies::DepStream deps(nm); deps.next(); ) { | |
585 klassOop klass = deps.context_type(); | |
586 if (klass == NULL) continue; // ignore things like evol_method | |
587 | |
588 // record this nmethod as dependent on this klass | |
589 instanceKlass::cast(klass)->add_dependent_nmethod(nm); | |
590 } | |
591 } | |
592 NOT_PRODUCT(if (nm != NULL) nmethod_stats.note_nmethod(nm)); | |
593 if (PrintAssembly && nm != NULL) | |
594 Disassembler::decode(nm); | |
595 } | |
596 | |
597 // verify nmethod | |
598 debug_only(if (nm) nm->verify();) // might block | |
599 | |
600 if (nm != NULL) { | |
601 nm->log_new_nmethod(); | |
602 } | |
603 | |
604 // done | |
605 return nm; | |
606 } | |
607 | |
608 | |
609 // For native wrappers | |
610 nmethod::nmethod( | |
611 methodOop method, | |
612 int nmethod_size, | |
613 CodeOffsets* offsets, | |
614 CodeBuffer* code_buffer, | |
615 int frame_size, | |
616 ByteSize basic_lock_owner_sp_offset, | |
617 ByteSize basic_lock_sp_offset, | |
618 OopMapSet* oop_maps ) | |
619 : CodeBlob("native nmethod", code_buffer, sizeof(nmethod), | |
620 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 621 _native_receiver_sp_offset(basic_lock_owner_sp_offset), |
622 _native_basic_lock_sp_offset(basic_lock_sp_offset) | |
0 | 623 { |
624 { | |
625 debug_only(No_Safepoint_Verifier nsv;) | |
626 assert_locked_or_safepoint(CodeCache_lock); | |
627 | |
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628 init_defaults(); |
0 | 629 _method = method; |
630 _entry_bci = InvocationEntryBci; | |
631 // We have no exception handler or deopt handler make the | |
632 // values something that will never match a pc like the nmethod vtable entry | |
633 _exception_offset = 0; | |
634 _deoptimize_offset = 0; | |
1204 | 635 _deoptimize_mh_offset = 0; |
0 | 636 _orig_pc_offset = 0; |
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637 |
1748 | 638 _consts_offset = data_offset(); |
0 | 639 _stub_offset = data_offset(); |
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640 _oops_offset = data_offset(); |
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641 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
0 | 642 _scopes_pcs_offset = _scopes_data_offset; |
643 _dependencies_offset = _scopes_pcs_offset; | |
644 _handler_table_offset = _dependencies_offset; | |
645 _nul_chk_table_offset = _handler_table_offset; | |
646 _nmethod_end_offset = _nul_chk_table_offset; | |
647 _compile_id = 0; // default | |
648 _comp_level = CompLevel_none; | |
1748 | 649 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
650 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
0 | 651 _osr_entry_point = NULL; |
652 _exception_cache = NULL; | |
653 _pc_desc_cache.reset_to(NULL); | |
654 | |
655 code_buffer->copy_oops_to(this); | |
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656 debug_only(verify_scavenge_root_oops()); |
0 | 657 CodeCache::commit(this); |
658 } | |
659 | |
660 if (PrintNativeNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { | |
661 ttyLocker ttyl; // keep the following output all in one block | |
662 // This output goes directly to the tty, not the compiler log. | |
663 // To enable tools to match it up with the compilation activity, | |
664 // be sure to tag this tty output with the compile ID. | |
665 if (xtty != NULL) { | |
666 xtty->begin_head("print_native_nmethod"); | |
667 xtty->method(_method); | |
668 xtty->stamp(); | |
669 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); | |
670 } | |
671 // print the header part first | |
672 print(); | |
673 // then print the requested information | |
674 if (PrintNativeNMethods) { | |
675 print_code(); | |
676 oop_maps->print(); | |
677 } | |
678 if (PrintRelocations) { | |
679 print_relocations(); | |
680 } | |
681 if (xtty != NULL) { | |
682 xtty->tail("print_native_nmethod"); | |
683 } | |
684 } | |
685 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
686 } | |
687 | |
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688 // For dtrace wrappers |
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689 #ifdef HAVE_DTRACE_H |
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690 nmethod::nmethod( |
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691 methodOop method, |
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692 int nmethod_size, |
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693 CodeOffsets* offsets, |
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694 CodeBuffer* code_buffer, |
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695 int frame_size) |
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696 : CodeBlob("dtrace nmethod", code_buffer, sizeof(nmethod), |
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697 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, NULL), |
2019 | 698 _native_receiver_sp_offset(in_ByteSize(-1)), |
699 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
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700 { |
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701 { |
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702 debug_only(No_Safepoint_Verifier nsv;) |
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703 assert_locked_or_safepoint(CodeCache_lock); |
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704 |
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705 init_defaults(); |
116
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706 _method = method; |
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707 _entry_bci = InvocationEntryBci; |
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708 // We have no exception handler or deopt handler make the |
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709 // values something that will never match a pc like the nmethod vtable entry |
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710 _exception_offset = 0; |
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711 _deoptimize_offset = 0; |
1204 | 712 _deoptimize_mh_offset = 0; |
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713 _unwind_handler_offset = -1; |
116
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714 _trap_offset = offsets->value(CodeOffsets::Dtrace_trap); |
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715 _orig_pc_offset = 0; |
1748 | 716 _consts_offset = data_offset(); |
116
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717 _stub_offset = data_offset(); |
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718 _oops_offset = data_offset(); |
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719 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size(), oopSize); |
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720 _scopes_pcs_offset = _scopes_data_offset; |
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721 _dependencies_offset = _scopes_pcs_offset; |
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722 _handler_table_offset = _dependencies_offset; |
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723 _nul_chk_table_offset = _handler_table_offset; |
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724 _nmethod_end_offset = _nul_chk_table_offset; |
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725 _compile_id = 0; // default |
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726 _comp_level = CompLevel_none; |
1748 | 727 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
728 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
116
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729 _osr_entry_point = NULL; |
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730 _exception_cache = NULL; |
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731 _pc_desc_cache.reset_to(NULL); |
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732 |
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733 code_buffer->copy_oops_to(this); |
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734 debug_only(verify_scavenge_root_oops()); |
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735 CodeCache::commit(this); |
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736 } |
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737 |
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738 if (PrintNMethods || PrintDebugInfo || PrintRelocations || PrintDependencies) { |
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739 ttyLocker ttyl; // keep the following output all in one block |
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740 // This output goes directly to the tty, not the compiler log. |
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741 // To enable tools to match it up with the compilation activity, |
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742 // be sure to tag this tty output with the compile ID. |
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743 if (xtty != NULL) { |
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744 xtty->begin_head("print_dtrace_nmethod"); |
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745 xtty->method(_method); |
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746 xtty->stamp(); |
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747 xtty->end_head(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
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748 } |
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749 // print the header part first |
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750 print(); |
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751 // then print the requested information |
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752 if (PrintNMethods) { |
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753 print_code(); |
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754 } |
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755 if (PrintRelocations) { |
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756 print_relocations(); |
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757 } |
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758 if (xtty != NULL) { |
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759 xtty->tail("print_dtrace_nmethod"); |
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760 } |
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761 } |
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762 Events::log("Create nmethod " INTPTR_FORMAT, this); |
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763 } |
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764 #endif // def HAVE_DTRACE_H |
0 | 765 |
766 void* nmethod::operator new(size_t size, int nmethod_size) { | |
767 // Always leave some room in the CodeCache for I2C/C2I adapters | |
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768 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) return NULL; |
0 | 769 return CodeCache::allocate(nmethod_size); |
770 } | |
771 | |
772 | |
773 nmethod::nmethod( | |
774 methodOop method, | |
775 int nmethod_size, | |
776 int compile_id, | |
777 int entry_bci, | |
778 CodeOffsets* offsets, | |
779 int orig_pc_offset, | |
780 DebugInformationRecorder* debug_info, | |
781 Dependencies* dependencies, | |
782 CodeBuffer *code_buffer, | |
783 int frame_size, | |
784 OopMapSet* oop_maps, | |
785 ExceptionHandlerTable* handler_table, | |
786 ImplicitExceptionTable* nul_chk_table, | |
787 AbstractCompiler* compiler, | |
788 int comp_level | |
789 ) | |
790 : CodeBlob("nmethod", code_buffer, sizeof(nmethod), | |
791 nmethod_size, offsets->value(CodeOffsets::Frame_Complete), frame_size, oop_maps), | |
2019 | 792 _native_receiver_sp_offset(in_ByteSize(-1)), |
793 _native_basic_lock_sp_offset(in_ByteSize(-1)) | |
0 | 794 { |
795 assert(debug_info->oop_recorder() == code_buffer->oop_recorder(), "shared OR"); | |
796 { | |
797 debug_only(No_Safepoint_Verifier nsv;) | |
798 assert_locked_or_safepoint(CodeCache_lock); | |
799 | |
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800 init_defaults(); |
0 | 801 _method = method; |
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802 _entry_bci = entry_bci; |
0 | 803 _compile_id = compile_id; |
804 _comp_level = comp_level; | |
805 _compiler = compiler; | |
806 _orig_pc_offset = orig_pc_offset; | |
1748 | 807 |
808 // Section offsets | |
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809 _consts_offset = content_offset() + code_buffer->total_offset_of(code_buffer->consts()); |
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810 _stub_offset = content_offset() + code_buffer->total_offset_of(code_buffer->stubs()); |
0 | 811 |
812 // Exception handler and deopt handler are in the stub section | |
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813 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must be set"); |
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814 assert(offsets->value(CodeOffsets::Deopt ) != -1, "must be set"); |
1748 | 815 _exception_offset = _stub_offset + offsets->value(CodeOffsets::Exceptions); |
816 _deoptimize_offset = _stub_offset + offsets->value(CodeOffsets::Deopt); | |
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817 if (offsets->value(CodeOffsets::DeoptMH) != -1) { |
1762
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818 _deoptimize_mh_offset = _stub_offset + offsets->value(CodeOffsets::DeoptMH); |
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819 } else { |
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820 _deoptimize_mh_offset = -1; |
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821 } |
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822 if (offsets->value(CodeOffsets::UnwindHandler) != -1) { |
1748 | 823 _unwind_handler_offset = code_offset() + offsets->value(CodeOffsets::UnwindHandler); |
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824 } else { |
1748 | 825 _unwind_handler_offset = -1; |
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826 } |
1748 | 827 |
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828 _oops_offset = data_offset(); |
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829 _scopes_data_offset = _oops_offset + round_to(code_buffer->total_oop_size (), oopSize); |
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830 _scopes_pcs_offset = _scopes_data_offset + round_to(debug_info->data_size (), oopSize); |
0 | 831 _dependencies_offset = _scopes_pcs_offset + adjust_pcs_size(debug_info->pcs_size()); |
832 _handler_table_offset = _dependencies_offset + round_to(dependencies->size_in_bytes (), oopSize); | |
833 _nul_chk_table_offset = _handler_table_offset + round_to(handler_table->size_in_bytes(), oopSize); | |
834 _nmethod_end_offset = _nul_chk_table_offset + round_to(nul_chk_table->size_in_bytes(), oopSize); | |
835 | |
1748 | 836 _entry_point = code_begin() + offsets->value(CodeOffsets::Entry); |
837 _verified_entry_point = code_begin() + offsets->value(CodeOffsets::Verified_Entry); | |
838 _osr_entry_point = code_begin() + offsets->value(CodeOffsets::OSR_Entry); | |
0 | 839 _exception_cache = NULL; |
840 _pc_desc_cache.reset_to(scopes_pcs_begin()); | |
841 | |
842 // Copy contents of ScopeDescRecorder to nmethod | |
843 code_buffer->copy_oops_to(this); | |
844 debug_info->copy_to(this); | |
845 dependencies->copy_to(this); | |
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846 if (ScavengeRootsInCode && detect_scavenge_root_oops()) { |
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847 CodeCache::add_scavenge_root_nmethod(this); |
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848 } |
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849 debug_only(verify_scavenge_root_oops()); |
0 | 850 |
851 CodeCache::commit(this); | |
852 | |
853 // Copy contents of ExceptionHandlerTable to nmethod | |
854 handler_table->copy_to(this); | |
855 nul_chk_table->copy_to(this); | |
856 | |
857 // we use the information of entry points to find out if a method is | |
858 // static or non static | |
859 assert(compiler->is_c2() || | |
860 _method->is_static() == (entry_point() == _verified_entry_point), | |
861 " entry points must be same for static methods and vice versa"); | |
862 } | |
863 | |
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864 bool printnmethods = PrintNMethods |
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865 || CompilerOracle::should_print(_method) |
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866 || CompilerOracle::has_option_string(_method, "PrintNMethods"); |
0 | 867 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) { |
868 print_nmethod(printnmethods); | |
869 } | |
870 | |
871 // Note: Do not verify in here as the CodeCache_lock is | |
872 // taken which would conflict with the CompiledIC_lock | |
873 // which taken during the verification of call sites. | |
874 // (was bug - gri 10/25/99) | |
875 | |
876 Events::log("Create nmethod " INTPTR_FORMAT, this); | |
877 } | |
878 | |
879 | |
880 // Print a short set of xml attributes to identify this nmethod. The | |
881 // output should be embedded in some other element. | |
882 void nmethod::log_identity(xmlStream* log) const { | |
883 log->print(" compile_id='%d'", compile_id()); | |
884 const char* nm_kind = compile_kind(); | |
885 if (nm_kind != NULL) log->print(" compile_kind='%s'", nm_kind); | |
886 if (compiler() != NULL) { | |
887 log->print(" compiler='%s'", compiler()->name()); | |
888 } | |
1783 | 889 if (TieredCompilation) { |
890 log->print(" level='%d'", comp_level()); | |
891 } | |
0 | 892 } |
893 | |
894 | |
895 #define LOG_OFFSET(log, name) \ | |
896 if ((intptr_t)name##_end() - (intptr_t)name##_begin()) \ | |
897 log->print(" " XSTR(name) "_offset='%d'" , \ | |
898 (intptr_t)name##_begin() - (intptr_t)this) | |
899 | |
900 | |
901 void nmethod::log_new_nmethod() const { | |
902 if (LogCompilation && xtty != NULL) { | |
903 ttyLocker ttyl; | |
904 HandleMark hm; | |
905 xtty->begin_elem("nmethod"); | |
906 log_identity(xtty); | |
1748 | 907 xtty->print(" entry='" INTPTR_FORMAT "' size='%d'", code_begin(), size()); |
0 | 908 xtty->print(" address='" INTPTR_FORMAT "'", (intptr_t) this); |
909 | |
910 LOG_OFFSET(xtty, relocation); | |
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911 LOG_OFFSET(xtty, consts); |
1748 | 912 LOG_OFFSET(xtty, insts); |
0 | 913 LOG_OFFSET(xtty, stub); |
914 LOG_OFFSET(xtty, scopes_data); | |
915 LOG_OFFSET(xtty, scopes_pcs); | |
916 LOG_OFFSET(xtty, dependencies); | |
917 LOG_OFFSET(xtty, handler_table); | |
918 LOG_OFFSET(xtty, nul_chk_table); | |
919 LOG_OFFSET(xtty, oops); | |
920 | |
921 xtty->method(method()); | |
922 xtty->stamp(); | |
923 xtty->end_elem(); | |
924 } | |
925 } | |
926 | |
927 #undef LOG_OFFSET | |
928 | |
929 | |
1783 | 930 void nmethod::print_compilation(outputStream *st, const char *method_name, const char *title, |
931 methodOop method, bool is_blocking, int compile_id, int bci, int comp_level) { | |
932 bool is_synchronized = false, has_xhandler = false, is_native = false; | |
933 int code_size = -1; | |
934 if (method != NULL) { | |
935 is_synchronized = method->is_synchronized(); | |
936 has_xhandler = method->has_exception_handler(); | |
937 is_native = method->is_native(); | |
938 code_size = method->code_size(); | |
939 } | |
940 // print compilation number | |
941 st->print("%7d %3d", (int)tty->time_stamp().milliseconds(), compile_id); | |
942 | |
943 // print method attributes | |
944 const bool is_osr = bci != InvocationEntryBci; | |
945 const char blocking_char = is_blocking ? 'b' : ' '; | |
946 const char compile_type = is_osr ? '%' : ' '; | |
947 const char sync_char = is_synchronized ? 's' : ' '; | |
948 const char exception_char = has_xhandler ? '!' : ' '; | |
949 const char native_char = is_native ? 'n' : ' '; | |
950 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); | |
951 if (TieredCompilation) { | |
952 st->print("%d ", comp_level); | |
953 } | |
954 | |
955 // print optional title | |
956 bool do_nl = false; | |
957 if (title != NULL) { | |
958 int tlen = (int) strlen(title); | |
959 bool do_nl = false; | |
960 if (tlen > 0 && title[tlen-1] == '\n') { tlen--; do_nl = true; } | |
961 st->print("%.*s", tlen, title); | |
962 } else { | |
963 do_nl = true; | |
964 } | |
965 | |
966 // print method name string if given | |
967 if (method_name != NULL) { | |
968 st->print(method_name); | |
969 } else { | |
970 // otherwise as the method to print itself | |
971 if (method != NULL && !Universe::heap()->is_gc_active()) { | |
972 method->print_short_name(st); | |
973 } else { | |
974 st->print("(method)"); | |
975 } | |
976 } | |
977 | |
978 if (method != NULL) { | |
979 // print osr_bci if any | |
980 if (is_osr) st->print(" @ %d", bci); | |
981 // print method size | |
982 st->print(" (%d bytes)", code_size); | |
983 } | |
984 if (do_nl) st->cr(); | |
985 } | |
986 | |
0 | 987 // Print out more verbose output usually for a newly created nmethod. |
988 void nmethod::print_on(outputStream* st, const char* title) const { | |
989 if (st != NULL) { | |
990 ttyLocker ttyl; | |
1783 | 991 print_compilation(st, /*method_name*/NULL, title, |
992 method(), /*is_blocking*/false, | |
1784
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993 compile_id(), |
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994 is_osr_method() ? osr_entry_bci() : InvocationEntryBci, |
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995 comp_level()); |
0 | 996 if (WizardMode) st->print(" (" INTPTR_FORMAT ")", this); |
997 } | |
998 } | |
999 | |
1000 | |
1001 void nmethod::print_nmethod(bool printmethod) { | |
1002 ttyLocker ttyl; // keep the following output all in one block | |
1003 if (xtty != NULL) { | |
1004 xtty->begin_head("print_nmethod"); | |
1005 xtty->stamp(); | |
1006 xtty->end_head(); | |
1007 } | |
1008 // print the header part first | |
1009 print(); | |
1010 // then print the requested information | |
1011 if (printmethod) { | |
1012 print_code(); | |
1013 print_pcs(); | |
1014 oop_maps()->print(); | |
1015 } | |
1016 if (PrintDebugInfo) { | |
1017 print_scopes(); | |
1018 } | |
1019 if (PrintRelocations) { | |
1020 print_relocations(); | |
1021 } | |
1022 if (PrintDependencies) { | |
1023 print_dependencies(); | |
1024 } | |
1025 if (PrintExceptionHandlers) { | |
1026 print_handler_table(); | |
1027 print_nul_chk_table(); | |
1028 } | |
1029 if (xtty != NULL) { | |
1030 xtty->tail("print_nmethod"); | |
1031 } | |
1032 } | |
1033 | |
1034 | |
1563
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1035 // Promote one word from an assembly-time handle to a live embedded oop. |
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1036 inline void nmethod::initialize_immediate_oop(oop* dest, jobject handle) { |
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1037 if (handle == NULL || |
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1038 // As a special case, IC oops are initialized to 1 or -1. |
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1039 handle == (jobject) Universe::non_oop_word()) { |
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1040 (*dest) = (oop) handle; |
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1041 } else { |
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1042 (*dest) = JNIHandles::resolve_non_null(handle); |
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1043 } |
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1044 } |
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1045 |
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1046 |
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1047 void nmethod::copy_oops(GrowableArray<jobject>* array) { |
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1048 //assert(oops_size() == 0, "do this handshake just once, please"); |
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1049 int length = array->length(); |
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1050 assert((address)(oops_begin() + length) <= data_end(), "oops big enough"); |
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1051 oop* dest = oops_begin(); |
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1052 for (int index = 0 ; index < length; index++) { |
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1053 initialize_immediate_oop(&dest[index], array->at(index)); |
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1054 } |
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1055 |
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1056 // Now we can fix up all the oops in the code. We need to do this |
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1057 // in the code because the assembler uses jobjects as placeholders. |
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1058 // The code and relocations have already been initialized by the |
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1059 // CodeBlob constructor, so it is valid even at this early point to |
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1060 // iterate over relocations and patch the code. |
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1061 fix_oop_relocations(NULL, NULL, /*initialize_immediates=*/ true); |
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1062 } |
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1063 |
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1064 |
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1065 bool nmethod::is_at_poll_return(address pc) { |
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1066 RelocIterator iter(this, pc, pc+1); |
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1067 while (iter.next()) { |
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1068 if (iter.type() == relocInfo::poll_return_type) |
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1069 return true; |
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1070 } |
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1071 return false; |
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1072 } |
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1073 |
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1074 |
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1075 bool nmethod::is_at_poll_or_poll_return(address pc) { |
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1076 RelocIterator iter(this, pc, pc+1); |
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1077 while (iter.next()) { |
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1078 relocInfo::relocType t = iter.type(); |
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1079 if (t == relocInfo::poll_return_type || t == relocInfo::poll_type) |
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1080 return true; |
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1081 } |
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1082 return false; |
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1083 } |
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1084 |
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1085 |
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1086 void nmethod::fix_oop_relocations(address begin, address end, bool initialize_immediates) { |
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1087 // re-patch all oop-bearing instructions, just in case some oops moved |
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1088 RelocIterator iter(this, begin, end); |
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1089 while (iter.next()) { |
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1090 if (iter.type() == relocInfo::oop_type) { |
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1091 oop_Relocation* reloc = iter.oop_reloc(); |
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1092 if (initialize_immediates && reloc->oop_is_immediate()) { |
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1093 oop* dest = reloc->oop_addr(); |
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1094 initialize_immediate_oop(dest, (jobject) *dest); |
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1095 } |
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1096 // Refresh the oop-related bits of this instruction. |
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1097 reloc->fix_oop_relocation(); |
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1098 } |
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1099 |
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1100 // There must not be any interfering patches or breakpoints. |
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1101 assert(!(iter.type() == relocInfo::breakpoint_type |
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1102 && iter.breakpoint_reloc()->active()), |
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1103 "no active breakpoint"); |
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1104 } |
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1105 } |
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1106 |
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1107 |
0 | 1108 ScopeDesc* nmethod::scope_desc_at(address pc) { |
1109 PcDesc* pd = pc_desc_at(pc); | |
1110 guarantee(pd != NULL, "scope must be present"); | |
1111 return new ScopeDesc(this, pd->scope_decode_offset(), | |
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1112 pd->obj_decode_offset(), pd->should_reexecute(), |
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1113 pd->return_oop()); |
0 | 1114 } |
1115 | |
1116 | |
1117 void nmethod::clear_inline_caches() { | |
1118 assert(SafepointSynchronize::is_at_safepoint(), "cleaning of IC's only allowed at safepoint"); | |
1119 if (is_zombie()) { | |
1120 return; | |
1121 } | |
1122 | |
1123 RelocIterator iter(this); | |
1124 while (iter.next()) { | |
1125 iter.reloc()->clear_inline_cache(); | |
1126 } | |
1127 } | |
1128 | |
1129 | |
1130 void nmethod::cleanup_inline_caches() { | |
1131 | |
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1132 assert_locked_or_safepoint(CompiledIC_lock); |
0 | 1133 |
1134 // If the method is not entrant or zombie then a JMP is plastered over the | |
1135 // first few bytes. If an oop in the old code was there, that oop | |
1136 // should not get GC'd. Skip the first few bytes of oops on | |
1137 // not-entrant methods. | |
1138 address low_boundary = verified_entry_point(); | |
1139 if (!is_in_use()) { | |
1140 low_boundary += NativeJump::instruction_size; | |
1141 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1142 // This means that the low_boundary is going to be a little too high. | |
1143 // This shouldn't matter, since oops of non-entrant methods are never used. | |
1144 // In fact, why are we bothering to look at oops in a non-entrant method?? | |
1145 } | |
1146 | |
1147 // Find all calls in an nmethod, and clear the ones that points to zombie methods | |
1148 ResourceMark rm; | |
1149 RelocIterator iter(this, low_boundary); | |
1150 while(iter.next()) { | |
1151 switch(iter.type()) { | |
1152 case relocInfo::virtual_call_type: | |
1153 case relocInfo::opt_virtual_call_type: { | |
1154 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1155 // Ok, to lookup references to zombies here | |
1156 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | |
1157 if( cb != NULL && cb->is_nmethod() ) { | |
1158 nmethod* nm = (nmethod*)cb; | |
1159 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1160 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
0 | 1161 } |
1162 break; | |
1163 } | |
1164 case relocInfo::static_call_type: { | |
1165 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | |
1166 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | |
1167 if( cb != NULL && cb->is_nmethod() ) { | |
1168 nmethod* nm = (nmethod*)cb; | |
1169 // Clean inline caches pointing to both zombie and not_entrant methods | |
1202 | 1170 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
0 | 1171 } |
1172 break; | |
1173 } | |
1174 } | |
1175 } | |
1176 } | |
1177 | |
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1178 // This is a private interface with the sweeper. |
0 | 1179 void nmethod::mark_as_seen_on_stack() { |
1180 assert(is_not_entrant(), "must be a non-entrant method"); | |
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1181 // Set the traversal mark to ensure that the sweeper does 2 |
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1182 // cleaning passes before moving to zombie. |
0 | 1183 set_stack_traversal_mark(NMethodSweeper::traversal_count()); |
1184 } | |
1185 | |
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1186 // Tell if a non-entrant method can be converted to a zombie (i.e., |
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1187 // there are no activations on the stack, not in use by the VM, |
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1188 // and not in use by the ServiceThread) |
0 | 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. | |
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1195 return stack_traversal_mark()+1 < NMethodSweeper::traversal_count() && |
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1196 !is_locked_by_vm(); |
0 | 1197 } |
1198 | |
1199 void nmethod::inc_decompile_count() { | |
1783 | 1200 if (!is_compiled_by_c2()) return; |
0 | 1201 // Could be gated by ProfileTraps, but do not bother... |
1202 methodOop m = method(); | |
1203 if (m == NULL) return; | |
1204 methodDataOop mdo = m->method_data(); | |
1205 if (mdo == NULL) return; | |
1206 // There is a benign race here. See comments in methodDataOop.hpp. | |
1207 mdo->inc_decompile_count(); | |
1208 } | |
1209 | |
1210 void nmethod::make_unloaded(BoolObjectClosure* is_alive, oop cause) { | |
1211 | |
1212 post_compiled_method_unload(); | |
1213 | |
1214 // Since this nmethod is being unloaded, make sure that dependencies | |
1215 // recorded in instanceKlasses get flushed and pass non-NULL closure to | |
1216 // indicate that this work is being done during a GC. | |
1217 assert(Universe::heap()->is_gc_active(), "should only be called during gc"); | |
1218 assert(is_alive != NULL, "Should be non-NULL"); | |
1219 // A non-NULL is_alive closure indicates that this is being called during GC. | |
1220 flush_dependencies(is_alive); | |
1221 | |
1222 // Break cycle between nmethod & method | |
1223 if (TraceClassUnloading && WizardMode) { | |
1224 tty->print_cr("[Class unloading: Making nmethod " INTPTR_FORMAT | |
1225 " unloadable], methodOop(" INTPTR_FORMAT | |
1226 "), cause(" INTPTR_FORMAT ")", | |
1227 this, (address)_method, (address)cause); | |
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1228 if (!Universe::heap()->is_gc_active()) |
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1229 cause->klass()->print(); |
0 | 1230 } |
941 | 1231 // Unlink the osr method, so we do not look this up again |
1232 if (is_osr_method()) { | |
1233 invalidate_osr_method(); | |
1234 } | |
0 | 1235 // If _method is already NULL the methodOop is about to be unloaded, |
1236 // so we don't have to break the cycle. Note that it is possible to | |
1237 // have the methodOop live here, in case we unload the nmethod because | |
1238 // it is pointing to some oop (other than the methodOop) being unloaded. | |
1239 if (_method != NULL) { | |
1240 // OSR methods point to the methodOop, but the methodOop does not | |
1241 // point back! | |
1242 if (_method->code() == this) { | |
1243 _method->clear_code(); // Break a cycle | |
1244 } | |
1245 _method = NULL; // Clear the method of this dead nmethod | |
1246 } | |
1247 // Make the class unloaded - i.e., change state and notify sweeper | |
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1248 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); |
0 | 1249 if (is_in_use()) { |
1250 // Transitioning directly from live to unloaded -- so | |
1251 // we need to force a cache clean-up; remember this | |
1252 // for later on. | |
1253 CodeCache::set_needs_cache_clean(true); | |
1254 } | |
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1255 _state = unloaded; |
0 | 1256 |
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1257 // Log the unloading. |
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1258 log_state_change(); |
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1259 |
0 | 1260 // The methodOop is gone at this point |
1261 assert(_method == NULL, "Tautology"); | |
1262 | |
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1263 set_osr_link(NULL); |
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1264 //set_scavenge_root_link(NULL); // done by prune_scavenge_root_nmethods |
0 | 1265 NMethodSweeper::notify(this); |
1266 } | |
1267 | |
1268 void nmethod::invalidate_osr_method() { | |
1269 assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); | |
1270 // Remove from list of active nmethods | |
1271 if (method() != NULL) | |
1272 instanceKlass::cast(method()->method_holder())->remove_osr_nmethod(this); | |
1273 // Set entry as invalid | |
1274 _entry_bci = InvalidOSREntryBci; | |
1275 } | |
1276 | |
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1277 void nmethod::log_state_change() const { |
0 | 1278 if (LogCompilation) { |
1279 if (xtty != NULL) { | |
1280 ttyLocker ttyl; // keep the following output all in one block | |
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1281 if (_state == unloaded) { |
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1282 xtty->begin_elem("make_unloaded thread='" UINTX_FORMAT "'", |
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1283 os::current_thread_id()); |
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1284 } else { |
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1285 xtty->begin_elem("make_not_entrant thread='" UINTX_FORMAT "'%s", |
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1286 os::current_thread_id(), |
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1287 (_state == zombie ? " zombie='1'" : "")); |
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1288 } |
0 | 1289 log_identity(xtty); |
1290 xtty->stamp(); | |
1291 xtty->end_elem(); | |
1292 } | |
1293 } | |
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1294 if (PrintCompilation && _state != unloaded) { |
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1295 print_on(tty, _state == zombie ? "made zombie " : "made not entrant "); |
0 | 1296 tty->cr(); |
1297 } | |
1298 } | |
1299 | |
1300 // Common functionality for both make_not_entrant and make_zombie | |
1141 | 1301 bool nmethod::make_not_entrant_or_zombie(unsigned int state) { |
0 | 1302 assert(state == zombie || state == not_entrant, "must be zombie or not_entrant"); |
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1303 assert(!is_zombie(), "should not already be a zombie"); |
0 | 1304 |
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1305 // Make sure neither the nmethod nor the method is flushed in case of a safepoint in code below. |
0 | 1306 nmethodLocker nml(this); |
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1307 methodHandle the_method(method()); |
1726 | 1308 No_Safepoint_Verifier nsv; |
0 | 1309 |
1310 { | |
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1311 // invalidate osr nmethod before acquiring the patching lock since |
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1312 // they both acquire leaf locks and we don't want a deadlock. |
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1313 // This logic is equivalent to the logic below for patching the |
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1314 // verified entry point of regular methods. |
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1315 if (is_osr_method()) { |
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1316 // this effectively makes the osr nmethod not entrant |
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1317 invalidate_osr_method(); |
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1318 } |
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1319 |
0 | 1320 // Enter critical section. Does not block for safepoint. |
1321 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1322 |
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1323 if (_state == state) { |
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1324 // another thread already performed this transition so nothing |
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1325 // to do, but return false to indicate this. |
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1326 return false; |
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1327 } |
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1328 |
0 | 1329 // The caller can be calling the method statically or through an inline |
1330 // cache call. | |
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1331 if (!is_osr_method() && !is_not_entrant()) { |
0 | 1332 NativeJump::patch_verified_entry(entry_point(), verified_entry_point(), |
1333 SharedRuntime::get_handle_wrong_method_stub()); | |
1334 } | |
1335 | |
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1336 if (is_in_use()) { |
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1337 // It's a true state change, so mark the method as decompiled. |
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1338 // Do it only for transition from alive. |
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1339 inc_decompile_count(); |
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1340 } |
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1341 |
0 | 1342 // Change state |
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1343 _state = state; |
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1344 |
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1345 // Log the transition once |
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1346 log_state_change(); |
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1347 |
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1348 // Remove nmethod from method. |
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1349 // We need to check if both the _code and _from_compiled_code_entry_point |
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1350 // refer to this nmethod because there is a race in setting these two fields |
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1351 // in methodOop as seen in bugid 4947125. |
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1352 // If the vep() points to the zombie nmethod, the memory for the nmethod |
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1353 // could be flushed and the compiler and vtable stubs could still call |
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1354 // through it. |
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1355 if (method() != NULL && (method()->code() == this || |
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1356 method()->from_compiled_entry() == verified_entry_point())) { |
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1357 HandleMark hm; |
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1358 method()->clear_code(); |
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1359 } |
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1360 |
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1361 if (state == not_entrant) { |
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1362 mark_as_seen_on_stack(); |
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1363 } |
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1364 |
0 | 1365 } // leave critical region under Patching_lock |
1366 | |
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1367 // When the nmethod becomes zombie it is no longer alive so the |
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1368 // dependencies must be flushed. nmethods in the not_entrant |
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1369 // state will be flushed later when the transition to zombie |
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1370 // happens or they get unloaded. |
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1371 if (state == zombie) { |
1726 | 1372 { |
1373 // Flushing dependecies must be done before any possible | |
1374 // safepoint can sneak in, otherwise the oops used by the | |
1375 // dependency logic could have become stale. | |
1376 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1377 flush_dependencies(NULL); | |
1378 } | |
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1379 |
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1380 // zombie only - if a JVMTI agent has enabled the CompiledMethodUnload |
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1381 // event and it hasn't already been reported for this nmethod then |
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1382 // report it now. The event may have been reported earilier if the GC |
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1383 // marked it for unloading). JvmtiDeferredEventQueue support means |
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1384 // we no longer go to a safepoint here. |
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1385 post_compiled_method_unload(); |
1726 | 1386 |
1387 #ifdef ASSERT | |
1388 // It's no longer safe to access the oops section since zombie | |
1389 // nmethods aren't scanned for GC. | |
1390 _oops_are_stale = true; | |
1391 #endif | |
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1392 } else { |
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1393 assert(state == not_entrant, "other cases may need to be handled differently"); |
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1394 } |
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1395 |
0 | 1396 if (TraceCreateZombies) { |
1397 tty->print_cr("nmethod <" INTPTR_FORMAT "> code made %s", this, (state == not_entrant) ? "not entrant" : "zombie"); | |
1398 } | |
1399 | |
1400 // Make sweeper aware that there is a zombie method that needs to be removed | |
1401 NMethodSweeper::notify(this); | |
1402 | |
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1403 return true; |
0 | 1404 } |
1405 | |
1406 void nmethod::flush() { | |
1407 // Note that there are no valid oops in the nmethod anymore. | |
1408 assert(is_zombie() || (is_osr_method() && is_unloaded()), "must be a zombie method"); | |
1409 assert(is_marked_for_reclamation() || (is_osr_method() && is_unloaded()), "must be marked for reclamation"); | |
1410 | |
1411 assert (!is_locked_by_vm(), "locked methods shouldn't be flushed"); | |
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1412 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1413 |
1414 // completely deallocate this method | |
1415 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); | |
1416 if (PrintMethodFlushing) { | |
1202 | 1417 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb", |
1418 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024); | |
0 | 1419 } |
1420 | |
1421 // We need to deallocate any ExceptionCache data. | |
1422 // Note that we do not need to grab the nmethod lock for this, it | |
1423 // better be thread safe if we're disposing of it! | |
1424 ExceptionCache* ec = exception_cache(); | |
1425 set_exception_cache(NULL); | |
1426 while(ec != NULL) { | |
1427 ExceptionCache* next = ec->next(); | |
1428 delete ec; | |
1429 ec = next; | |
1430 } | |
1431 | |
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1432 if (on_scavenge_root_list()) { |
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1433 CodeCache::drop_scavenge_root_nmethod(this); |
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1434 } |
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1435 |
1202 | 1436 if (is_speculatively_disconnected()) { |
1437 CodeCache::remove_saved_code(this); | |
1438 } | |
1439 | |
1692 | 1440 #ifdef SHARK |
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1441 ((SharkCompiler *) compiler())->free_compiled_method(insts_begin()); |
1692 | 1442 #endif // SHARK |
1443 | |
0 | 1444 ((CodeBlob*)(this))->flush(); |
1445 | |
1446 CodeCache::free(this); | |
1447 } | |
1448 | |
1449 | |
1450 // | |
1451 // Notify all classes this nmethod is dependent on that it is no | |
1452 // longer dependent. This should only be called in two situations. | |
1453 // First, when a nmethod transitions to a zombie all dependents need | |
1454 // to be clear. Since zombification happens at a safepoint there's no | |
1455 // synchronization issues. The second place is a little more tricky. | |
1456 // During phase 1 of mark sweep class unloading may happen and as a | |
1457 // result some nmethods may get unloaded. In this case the flushing | |
1458 // of dependencies must happen during phase 1 since after GC any | |
1459 // dependencies in the unloaded nmethod won't be updated, so | |
1460 // traversing the dependency information in unsafe. In that case this | |
1461 // function is called with a non-NULL argument and this function only | |
1462 // notifies instanceKlasses that are reachable | |
1463 | |
1464 void nmethod::flush_dependencies(BoolObjectClosure* is_alive) { | |
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1465 assert_locked_or_safepoint(CodeCache_lock); |
0 | 1466 assert(Universe::heap()->is_gc_active() == (is_alive != NULL), |
1467 "is_alive is non-NULL if and only if we are called during GC"); | |
1468 if (!has_flushed_dependencies()) { | |
1469 set_has_flushed_dependencies(); | |
1470 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
1471 klassOop klass = deps.context_type(); | |
1472 if (klass == NULL) continue; // ignore things like evol_method | |
1473 | |
1474 // During GC the is_alive closure is non-NULL, and is used to | |
1475 // determine liveness of dependees that need to be updated. | |
1476 if (is_alive == NULL || is_alive->do_object_b(klass)) { | |
1477 instanceKlass::cast(klass)->remove_dependent_nmethod(this); | |
1478 } | |
1479 } | |
1480 } | |
1481 } | |
1482 | |
1483 | |
1484 // If this oop is not live, the nmethod can be unloaded. | |
1485 bool nmethod::can_unload(BoolObjectClosure* is_alive, | |
1486 OopClosure* keep_alive, | |
1487 oop* root, bool unloading_occurred) { | |
1488 assert(root != NULL, "just checking"); | |
1489 oop obj = *root; | |
1490 if (obj == NULL || is_alive->do_object_b(obj)) { | |
1491 return false; | |
1492 } | |
1493 if (obj->is_compiledICHolder()) { | |
1494 compiledICHolderOop cichk_oop = compiledICHolderOop(obj); | |
1495 if (is_alive->do_object_b( | |
1496 cichk_oop->holder_method()->method_holder()) && | |
1497 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1498 // The oop should be kept alive | |
1499 keep_alive->do_oop(root); | |
1500 return false; | |
1501 } | |
1502 } | |
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1503 // If ScavengeRootsInCode is true, an nmethod might be unloaded |
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1504 // simply because one of its constant oops has gone dead. |
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1505 // No actual classes need to be unloaded in order for this to occur. |
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1506 assert(unloading_occurred || ScavengeRootsInCode, "Inconsistency in unloading"); |
0 | 1507 make_unloaded(is_alive, obj); |
1508 return true; | |
1509 } | |
1510 | |
1511 // ------------------------------------------------------------------ | |
1512 // post_compiled_method_load_event | |
1513 // new method for install_code() path | |
1514 // Transfer information from compilation to jvmti | |
1515 void nmethod::post_compiled_method_load_event() { | |
1516 | |
1517 methodOop moop = method(); | |
1518 HS_DTRACE_PROBE8(hotspot, compiled__method__load, | |
1519 moop->klass_name()->bytes(), | |
1520 moop->klass_name()->utf8_length(), | |
1521 moop->name()->bytes(), | |
1522 moop->name()->utf8_length(), | |
1523 moop->signature()->bytes(), | |
1524 moop->signature()->utf8_length(), | |
1748 | 1525 insts_begin(), insts_size()); |
0 | 1526 |
1616
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1527 if (JvmtiExport::should_post_compiled_method_load() || |
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1528 JvmtiExport::should_post_compiled_method_unload()) { |
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1529 get_and_cache_jmethod_id(); |
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1530 } |
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1531 |
0 | 1532 if (JvmtiExport::should_post_compiled_method_load()) { |
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1533 // Let the Service thread (which is a real Java thread) post the event |
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1534 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1535 JvmtiDeferredEventQueue::enqueue( |
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1536 JvmtiDeferredEvent::compiled_method_load_event(this)); |
0 | 1537 } |
1538 } | |
1539 | |
1616
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1540 jmethodID nmethod::get_and_cache_jmethod_id() { |
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1541 if (_jmethod_id == NULL) { |
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1542 // Cache the jmethod_id since it can no longer be looked up once the |
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1543 // method itself has been marked for unloading. |
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1544 _jmethod_id = method()->jmethod_id(); |
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1545 } |
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1546 return _jmethod_id; |
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1547 } |
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1548 |
0 | 1549 void nmethod::post_compiled_method_unload() { |
1577
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1550 if (unload_reported()) { |
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1551 // During unloading we transition to unloaded and then to zombie |
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1552 // and the unloading is reported during the first transition. |
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1553 return; |
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1554 } |
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1555 |
0 | 1556 assert(_method != NULL && !is_unloaded(), "just checking"); |
1557 DTRACE_METHOD_UNLOAD_PROBE(method()); | |
1558 | |
1559 // If a JVMTI agent has enabled the CompiledMethodUnload event then | |
1616
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1560 // post the event. Sometime later this nmethod will be made a zombie |
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1561 // by the sweeper but the methodOop will not be valid at that point. |
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1562 // If the _jmethod_id is null then no load event was ever requested |
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1563 // so don't bother posting the unload. The main reason for this is |
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1564 // that the jmethodID is a weak reference to the methodOop so if |
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1565 // it's being unloaded there's no way to look it up since the weak |
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1566 // ref will have been cleared. |
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1567 if (_jmethod_id != NULL && JvmtiExport::should_post_compiled_method_unload()) { |
0 | 1568 assert(!unload_reported(), "already unloaded"); |
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1569 JvmtiDeferredEvent event = |
2342
46a56fac55c7
7024970: 2/3 assert(ServiceThread::is_service_thread(Thread::current())) failed: Service thread must post enqueue
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1570 JvmtiDeferredEvent::compiled_method_unload_event(this, |
2195
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1571 _jmethod_id, insts_begin()); |
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1572 if (SafepointSynchronize::is_at_safepoint()) { |
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1573 // Don't want to take the queueing lock. Add it as pending and |
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1574 // it will get enqueued later. |
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1575 JvmtiDeferredEventQueue::add_pending_event(event); |
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1576 } else { |
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1577 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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1578 JvmtiDeferredEventQueue::enqueue(event); |
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1579 } |
0 | 1580 } |
1581 | |
1582 // The JVMTI CompiledMethodUnload event can be enabled or disabled at | |
1583 // any time. As the nmethod is being unloaded now we mark it has | |
1584 // having the unload event reported - this will ensure that we don't | |
1585 // attempt to report the event in the unlikely scenario where the | |
1586 // event is enabled at the time the nmethod is made a zombie. | |
1587 set_unload_reported(); | |
1588 } | |
1589 | |
1590 // This is called at the end of the strong tracing/marking phase of a | |
1591 // GC to unload an nmethod if it contains otherwise unreachable | |
1592 // oops. | |
1593 | |
1594 void nmethod::do_unloading(BoolObjectClosure* is_alive, | |
1595 OopClosure* keep_alive, bool unloading_occurred) { | |
1596 // Make sure the oop's ready to receive visitors | |
1597 assert(!is_zombie() && !is_unloaded(), | |
1598 "should not call follow on zombie or unloaded nmethod"); | |
1599 | |
1600 // If the method is not entrant then a JMP is plastered over the | |
1601 // first few bytes. If an oop in the old code was there, that oop | |
1602 // should not get GC'd. Skip the first few bytes of oops on | |
1603 // not-entrant methods. | |
1604 address low_boundary = verified_entry_point(); | |
1605 if (is_not_entrant()) { | |
1606 low_boundary += NativeJump::instruction_size; | |
1607 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1608 // (See comment above.) | |
1609 } | |
1610 | |
1611 // The RedefineClasses() API can cause the class unloading invariant | |
1612 // to no longer be true. See jvmtiExport.hpp for details. | |
1613 // Also, leave a debugging breadcrumb in local flag. | |
1614 bool a_class_was_redefined = JvmtiExport::has_redefined_a_class(); | |
1615 if (a_class_was_redefined) { | |
1616 // This set of the unloading_occurred flag is done before the | |
1617 // call to post_compiled_method_unload() so that the unloading | |
1618 // of this nmethod is reported. | |
1619 unloading_occurred = true; | |
1620 } | |
1621 | |
1622 // Follow methodOop | |
1623 if (can_unload(is_alive, keep_alive, (oop*)&_method, unloading_occurred)) { | |
1624 return; | |
1625 } | |
1626 | |
1627 // Exception cache | |
1628 ExceptionCache* ec = exception_cache(); | |
1629 while (ec != NULL) { | |
1630 oop* ex_addr = (oop*)ec->exception_type_addr(); | |
1631 oop ex = *ex_addr; | |
1632 ExceptionCache* next_ec = ec->next(); | |
1633 if (ex != NULL && !is_alive->do_object_b(ex)) { | |
1634 assert(!ex->is_compiledICHolder(), "Possible error here"); | |
1635 remove_from_exception_cache(ec); | |
1636 } | |
1637 ec = next_ec; | |
1638 } | |
1639 | |
1640 // If class unloading occurred we first iterate over all inline caches and | |
1641 // clear ICs where the cached oop is referring to an unloaded klass or method. | |
1642 // The remaining live cached oops will be traversed in the relocInfo::oop_type | |
1643 // iteration below. | |
1644 if (unloading_occurred) { | |
1645 RelocIterator iter(this, low_boundary); | |
1646 while(iter.next()) { | |
1647 if (iter.type() == relocInfo::virtual_call_type) { | |
1648 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1649 oop ic_oop = ic->cached_oop(); | |
1650 if (ic_oop != NULL && !is_alive->do_object_b(ic_oop)) { | |
1651 // The only exception is compiledICHolder oops which may | |
1652 // yet be marked below. (We check this further below). | |
1653 if (ic_oop->is_compiledICHolder()) { | |
1654 compiledICHolderOop cichk_oop = compiledICHolderOop(ic_oop); | |
1655 if (is_alive->do_object_b( | |
1656 cichk_oop->holder_method()->method_holder()) && | |
1657 is_alive->do_object_b(cichk_oop->holder_klass())) { | |
1658 continue; | |
1659 } | |
1660 } | |
1661 ic->set_to_clean(); | |
1489
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jcoomes
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1662 assert(ic->cached_oop() == NULL, |
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changeset
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1663 "cached oop in IC should be cleared"); |
0 | 1664 } |
1665 } | |
1666 } | |
1667 } | |
1668 | |
1669 // Compiled code | |
1670 RelocIterator iter(this, low_boundary); | |
1671 while (iter.next()) { | |
1672 if (iter.type() == relocInfo::oop_type) { | |
1673 oop_Relocation* r = iter.oop_reloc(); | |
1674 // In this loop, we must only traverse those oops directly embedded in | |
1675 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
1676 assert(1 == (r->oop_is_immediate()) + | |
1677 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1678 "oop must be found in exactly one place"); | |
1679 if (r->oop_is_immediate() && r->oop_value() != NULL) { | |
1680 if (can_unload(is_alive, keep_alive, r->oop_addr(), unloading_occurred)) { | |
1681 return; | |
1682 } | |
1683 } | |
1684 } | |
1685 } | |
1686 | |
1687 | |
1688 // Scopes | |
1689 for (oop* p = oops_begin(); p < oops_end(); p++) { | |
1690 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1691 if (can_unload(is_alive, keep_alive, p, unloading_occurred)) { | |
1692 return; | |
1693 } | |
1694 } | |
1695 | |
1696 #ifndef PRODUCT | |
1697 // This nmethod was not unloaded; check below that all CompiledICs | |
1698 // refer to marked oops. | |
1699 { | |
1700 RelocIterator iter(this, low_boundary); | |
1701 while (iter.next()) { | |
1702 if (iter.type() == relocInfo::virtual_call_type) { | |
1703 CompiledIC *ic = CompiledIC_at(iter.reloc()); | |
1704 oop ic_oop = ic->cached_oop(); | |
1705 assert(ic_oop == NULL || is_alive->do_object_b(ic_oop), | |
1706 "Found unmarked ic_oop in reachable nmethod"); | |
1707 } | |
1708 } | |
1709 } | |
1710 #endif // !PRODUCT | |
1711 } | |
1712 | |
941 | 1713 // This method is called twice during GC -- once while |
1714 // tracing the "active" nmethods on thread stacks during | |
1715 // the (strong) marking phase, and then again when walking | |
1716 // the code cache contents during the weak roots processing | |
1717 // phase. The two uses are distinguished by means of the | |
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1718 // 'do_strong_roots_only' flag, which is true in the first |
941 | 1719 // case. We want to walk the weak roots in the nmethod |
1720 // only in the second case. The weak roots in the nmethod | |
1721 // are the oops in the ExceptionCache and the InlineCache | |
1722 // oops. | |
994
753cf9794df9
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|
1723 void nmethod::oops_do(OopClosure* f, bool do_strong_roots_only) { |
0 | 1724 // make sure the oops ready to receive visitors |
1725 assert(!is_zombie() && !is_unloaded(), | |
1726 "should not call follow on zombie or unloaded nmethod"); | |
1727 | |
1728 // If the method is not entrant or zombie then a JMP is plastered over the | |
1729 // first few bytes. If an oop in the old code was there, that oop | |
1730 // should not get GC'd. Skip the first few bytes of oops on | |
1731 // not-entrant methods. | |
1732 address low_boundary = verified_entry_point(); | |
1733 if (is_not_entrant()) { | |
1734 low_boundary += NativeJump::instruction_size; | |
1735 // %%% Note: On SPARC we patch only a 4-byte trap, not a full NativeJump. | |
1736 // (See comment above.) | |
1737 } | |
1738 | |
1739 // Compiled code | |
1740 f->do_oop((oop*) &_method); | |
994
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1741 if (!do_strong_roots_only) { |
941 | 1742 // weak roots processing phase -- update ExceptionCache oops |
1743 ExceptionCache* ec = exception_cache(); | |
1744 while(ec != NULL) { | |
1745 f->do_oop((oop*)ec->exception_type_addr()); | |
1746 ec = ec->next(); | |
1747 } | |
1748 } // Else strong roots phase -- skip oops in ExceptionCache | |
0 | 1749 |
1750 RelocIterator iter(this, low_boundary); | |
941 | 1751 |
0 | 1752 while (iter.next()) { |
1753 if (iter.type() == relocInfo::oop_type ) { | |
1754 oop_Relocation* r = iter.oop_reloc(); | |
1755 // In this loop, we must only follow those oops directly embedded in | |
1756 // the code. Other oops (oop_index>0) are seen as part of scopes_oops. | |
941 | 1757 assert(1 == (r->oop_is_immediate()) + |
1758 (r->oop_addr() >= oops_begin() && r->oop_addr() < oops_end()), | |
1759 "oop must be found in exactly one place"); | |
0 | 1760 if (r->oop_is_immediate() && r->oop_value() != NULL) { |
1761 f->do_oop(r->oop_addr()); | |
1762 } | |
1763 } | |
1764 } | |
1765 | |
1766 // Scopes | |
989
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1767 // This includes oop constants not inlined in the code stream. |
0 | 1768 for (oop* p = oops_begin(); p < oops_end(); p++) { |
1769 if (*p == Universe::non_oop_word()) continue; // skip non-oops | |
1770 f->do_oop(p); | |
1771 } | |
1772 } | |
1773 | |
989
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1774 #define NMETHOD_SENTINEL ((nmethod*)badAddress) |
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1775 |
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1776 nmethod* volatile nmethod::_oops_do_mark_nmethods; |
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1777 |
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1778 // An nmethod is "marked" if its _mark_link is set non-null. |
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1779 // Even if it is the end of the linked list, it will have a non-null link value, |
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1780 // as long as it is on the list. |
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1781 // This code must be MP safe, because it is used from parallel GC passes. |
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1782 bool nmethod::test_set_oops_do_mark() { |
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1783 assert(nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); |
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1784 nmethod* observed_mark_link = _oops_do_mark_link; |
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1785 if (observed_mark_link == NULL) { |
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1786 // Claim this nmethod for this thread to mark. |
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1787 observed_mark_link = (nmethod*) |
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1788 Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_link, NULL); |
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1789 if (observed_mark_link == NULL) { |
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1790 |
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1791 // Atomically append this nmethod (now claimed) to the head of the list: |
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1792 nmethod* observed_mark_nmethods = _oops_do_mark_nmethods; |
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1793 for (;;) { |
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1794 nmethod* required_mark_nmethods = observed_mark_nmethods; |
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1795 _oops_do_mark_link = required_mark_nmethods; |
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1796 observed_mark_nmethods = (nmethod*) |
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1797 Atomic::cmpxchg_ptr(this, &_oops_do_mark_nmethods, required_mark_nmethods); |
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1798 if (observed_mark_nmethods == required_mark_nmethods) |
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1799 break; |
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1800 } |
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1801 // Mark was clear when we first saw this guy. |
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1802 NOT_PRODUCT(if (TraceScavenge) print_on(tty, "oops_do, mark\n")); |
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1803 return false; |
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1804 } |
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1805 } |
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1806 // On fall through, another racing thread marked this nmethod before we did. |
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1807 return true; |
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1808 } |
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1809 |
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1810 void nmethod::oops_do_marking_prologue() { |
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1811 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("[oops_do_marking_prologue")); |
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1812 assert(_oops_do_mark_nmethods == NULL, "must not call oops_do_marking_prologue twice in a row"); |
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1813 // We use cmpxchg_ptr instead of regular assignment here because the user |
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1814 // may fork a bunch of threads, and we need them all to see the same state. |
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1815 void* observed = Atomic::cmpxchg_ptr(NMETHOD_SENTINEL, &_oops_do_mark_nmethods, NULL); |
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1816 guarantee(observed == NULL, "no races in this sequential code"); |
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1817 } |
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1818 |
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1819 void nmethod::oops_do_marking_epilogue() { |
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1820 assert(_oops_do_mark_nmethods != NULL, "must not call oops_do_marking_epilogue twice in a row"); |
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1821 nmethod* cur = _oops_do_mark_nmethods; |
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1822 while (cur != NMETHOD_SENTINEL) { |
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1823 assert(cur != NULL, "not NULL-terminated"); |
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1824 nmethod* next = cur->_oops_do_mark_link; |
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1825 cur->_oops_do_mark_link = NULL; |
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1826 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); |
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1827 cur = next; |
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1828 } |
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1829 void* required = _oops_do_mark_nmethods; |
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1830 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); |
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1831 guarantee(observed == required, "no races in this sequential code"); |
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1832 NOT_PRODUCT(if (TraceScavenge) tty->print_cr("oops_do_marking_epilogue]")); |
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1833 } |
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1834 |
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1835 class DetectScavengeRoot: public OopClosure { |
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1836 bool _detected_scavenge_root; |
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1837 public: |
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1838 DetectScavengeRoot() : _detected_scavenge_root(false) |
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1839 { NOT_PRODUCT(_print_nm = NULL); } |
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1840 bool detected_scavenge_root() { return _detected_scavenge_root; } |
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1841 virtual void do_oop(oop* p) { |
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1842 if ((*p) != NULL && (*p)->is_scavengable()) { |
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1843 NOT_PRODUCT(maybe_print(p)); |
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1844 _detected_scavenge_root = true; |
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1845 } |
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1846 } |
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1847 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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1848 |
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1849 #ifndef PRODUCT |
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1850 nmethod* _print_nm; |
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1851 void maybe_print(oop* p) { |
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1852 if (_print_nm == NULL) return; |
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1853 if (!_detected_scavenge_root) _print_nm->print_on(tty, "new scavenge root"); |
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1854 tty->print_cr(""PTR_FORMAT"[offset=%d] detected non-perm oop "PTR_FORMAT" (found at "PTR_FORMAT")", |
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1855 _print_nm, (int)((intptr_t)p - (intptr_t)_print_nm), |
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1856 (intptr_t)(*p), (intptr_t)p); |
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1857 (*p)->print(); |
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1858 } |
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1859 #endif //PRODUCT |
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1860 }; |
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1861 |
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1862 bool nmethod::detect_scavenge_root_oops() { |
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1863 DetectScavengeRoot detect_scavenge_root; |
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1864 NOT_PRODUCT(if (TraceScavenge) detect_scavenge_root._print_nm = this); |
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1865 oops_do(&detect_scavenge_root); |
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1866 return detect_scavenge_root.detected_scavenge_root(); |
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1867 } |
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1868 |
0 | 1869 // Method that knows how to preserve outgoing arguments at call. This method must be |
1870 // called with a frame corresponding to a Java invoke | |
1871 void nmethod::preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { | |
1692 | 1872 #ifndef SHARK |
0 | 1873 if (!method()->is_native()) { |
1874 SimpleScopeDesc ssd(this, fr.pc()); | |
2142 | 1875 Bytecode_invoke call(ssd.method(), ssd.bci()); |
1876 bool has_receiver = call.has_receiver(); | |
2177
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1877 Symbol* signature = call.signature(); |
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1878 fr.oops_compiled_arguments_do(signature, has_receiver, reg_map, f); |
0 | 1879 } |
1692 | 1880 #endif // !SHARK |
0 | 1881 } |
1882 | |
1883 | |
1884 oop nmethod::embeddedOop_at(u_char* p) { | |
2349
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1885 RelocIterator iter(this, p, p + 1); |
0 | 1886 while (iter.next()) |
1887 if (iter.type() == relocInfo::oop_type) { | |
1888 return iter.oop_reloc()->oop_value(); | |
1889 } | |
1890 return NULL; | |
1891 } | |
1892 | |
1893 | |
1894 inline bool includes(void* p, void* from, void* to) { | |
1895 return from <= p && p < to; | |
1896 } | |
1897 | |
1898 | |
1899 void nmethod::copy_scopes_pcs(PcDesc* pcs, int count) { | |
1900 assert(count >= 2, "must be sentinel values, at least"); | |
1901 | |
1902 #ifdef ASSERT | |
1903 // must be sorted and unique; we do a binary search in find_pc_desc() | |
1904 int prev_offset = pcs[0].pc_offset(); | |
1905 assert(prev_offset == PcDesc::lower_offset_limit, | |
1906 "must start with a sentinel"); | |
1907 for (int i = 1; i < count; i++) { | |
1908 int this_offset = pcs[i].pc_offset(); | |
1909 assert(this_offset > prev_offset, "offsets must be sorted"); | |
1910 prev_offset = this_offset; | |
1911 } | |
1912 assert(prev_offset == PcDesc::upper_offset_limit, | |
1913 "must end with a sentinel"); | |
1914 #endif //ASSERT | |
1915 | |
1135
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1916 // Search for MethodHandle invokes and tag the nmethod. |
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1917 for (int i = 0; i < count; i++) { |
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1918 if (pcs[i].is_method_handle_invoke()) { |
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1919 set_has_method_handle_invokes(true); |
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1920 break; |
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1921 } |
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1922 } |
2083
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1923 assert(has_method_handle_invokes() == (_deoptimize_mh_offset != -1), "must have deopt mh handler"); |
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1924 |
0 | 1925 int size = count * sizeof(PcDesc); |
1926 assert(scopes_pcs_size() >= size, "oob"); | |
1927 memcpy(scopes_pcs_begin(), pcs, size); | |
1928 | |
1929 // Adjust the final sentinel downward. | |
1930 PcDesc* last_pc = &scopes_pcs_begin()[count-1]; | |
1931 assert(last_pc->pc_offset() == PcDesc::upper_offset_limit, "sanity"); | |
1748 | 1932 last_pc->set_pc_offset(content_size() + 1); |
0 | 1933 for (; last_pc + 1 < scopes_pcs_end(); last_pc += 1) { |
1934 // Fill any rounding gaps with copies of the last record. | |
1935 last_pc[1] = last_pc[0]; | |
1936 } | |
1937 // The following assert could fail if sizeof(PcDesc) is not | |
1938 // an integral multiple of oopSize (the rounding term). | |
1939 // If it fails, change the logic to always allocate a multiple | |
1940 // of sizeof(PcDesc), and fill unused words with copies of *last_pc. | |
1941 assert(last_pc + 1 == scopes_pcs_end(), "must match exactly"); | |
1942 } | |
1943 | |
1944 void nmethod::copy_scopes_data(u_char* buffer, int size) { | |
1945 assert(scopes_data_size() >= size, "oob"); | |
1946 memcpy(scopes_data_begin(), buffer, size); | |
1947 } | |
1948 | |
1949 | |
1950 #ifdef ASSERT | |
1951 static PcDesc* linear_search(nmethod* nm, int pc_offset, bool approximate) { | |
1952 PcDesc* lower = nm->scopes_pcs_begin(); | |
1953 PcDesc* upper = nm->scopes_pcs_end(); | |
1954 lower += 1; // exclude initial sentinel | |
1955 PcDesc* res = NULL; | |
1956 for (PcDesc* p = lower; p < upper; p++) { | |
1957 NOT_PRODUCT(--nmethod_stats.pc_desc_tests); // don't count this call to match_desc | |
1958 if (match_desc(p, pc_offset, approximate)) { | |
1959 if (res == NULL) | |
1960 res = p; | |
1961 else | |
1962 res = (PcDesc*) badAddress; | |
1963 } | |
1964 } | |
1965 return res; | |
1966 } | |
1967 #endif | |
1968 | |
1969 | |
1970 // Finds a PcDesc with real-pc equal to "pc" | |
1971 PcDesc* nmethod::find_pc_desc_internal(address pc, bool approximate) { | |
1748 | 1972 address base_address = code_begin(); |
0 | 1973 if ((pc < base_address) || |
1974 (pc - base_address) >= (ptrdiff_t) PcDesc::upper_offset_limit) { | |
1975 return NULL; // PC is wildly out of range | |
1976 } | |
1977 int pc_offset = (int) (pc - base_address); | |
1978 | |
1979 // Check the PcDesc cache if it contains the desired PcDesc | |
1980 // (This as an almost 100% hit rate.) | |
1981 PcDesc* res = _pc_desc_cache.find_pc_desc(pc_offset, approximate); | |
1982 if (res != NULL) { | |
1983 assert(res == linear_search(this, pc_offset, approximate), "cache ok"); | |
1984 return res; | |
1985 } | |
1986 | |
1987 // Fallback algorithm: quasi-linear search for the PcDesc | |
1988 // Find the last pc_offset less than the given offset. | |
1989 // The successor must be the required match, if there is a match at all. | |
1990 // (Use a fixed radix to avoid expensive affine pointer arithmetic.) | |
1991 PcDesc* lower = scopes_pcs_begin(); | |
1992 PcDesc* upper = scopes_pcs_end(); | |
1993 upper -= 1; // exclude final sentinel | |
1994 if (lower >= upper) return NULL; // native method; no PcDescs at all | |
1995 | |
1996 #define assert_LU_OK \ | |
1997 /* invariant on lower..upper during the following search: */ \ | |
1998 assert(lower->pc_offset() < pc_offset, "sanity"); \ | |
1999 assert(upper->pc_offset() >= pc_offset, "sanity") | |
2000 assert_LU_OK; | |
2001 | |
2002 // Use the last successful return as a split point. | |
2003 PcDesc* mid = _pc_desc_cache.last_pc_desc(); | |
2004 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2005 if (mid->pc_offset() < pc_offset) { | |
2006 lower = mid; | |
2007 } else { | |
2008 upper = mid; | |
2009 } | |
2010 | |
2011 // Take giant steps at first (4096, then 256, then 16, then 1) | |
2012 const int LOG2_RADIX = 4 /*smaller steps in debug mode:*/ debug_only(-1); | |
2013 const int RADIX = (1 << LOG2_RADIX); | |
2014 for (int step = (1 << (LOG2_RADIX*3)); step > 1; step >>= LOG2_RADIX) { | |
2015 while ((mid = lower + step) < upper) { | |
2016 assert_LU_OK; | |
2017 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2018 if (mid->pc_offset() < pc_offset) { | |
2019 lower = mid; | |
2020 } else { | |
2021 upper = mid; | |
2022 break; | |
2023 } | |
2024 } | |
2025 assert_LU_OK; | |
2026 } | |
2027 | |
2028 // Sneak up on the value with a linear search of length ~16. | |
2029 while (true) { | |
2030 assert_LU_OK; | |
2031 mid = lower + 1; | |
2032 NOT_PRODUCT(++nmethod_stats.pc_desc_searches); | |
2033 if (mid->pc_offset() < pc_offset) { | |
2034 lower = mid; | |
2035 } else { | |
2036 upper = mid; | |
2037 break; | |
2038 } | |
2039 } | |
2040 #undef assert_LU_OK | |
2041 | |
2042 if (match_desc(upper, pc_offset, approximate)) { | |
2043 assert(upper == linear_search(this, pc_offset, approximate), "search ok"); | |
2044 _pc_desc_cache.add_pc_desc(upper); | |
2045 return upper; | |
2046 } else { | |
2047 assert(NULL == linear_search(this, pc_offset, approximate), "search ok"); | |
2048 return NULL; | |
2049 } | |
2050 } | |
2051 | |
2052 | |
2053 bool nmethod::check_all_dependencies() { | |
2054 bool found_check = false; | |
2055 // wholesale check of all dependencies | |
2056 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2057 if (deps.check_dependency() != NULL) { | |
2058 found_check = true; | |
2059 NOT_DEBUG(break); | |
2060 } | |
2061 } | |
2062 return found_check; // tell caller if we found anything | |
2063 } | |
2064 | |
2065 bool nmethod::check_dependency_on(DepChange& changes) { | |
2066 // What has happened: | |
2067 // 1) a new class dependee has been added | |
2068 // 2) dependee and all its super classes have been marked | |
2069 bool found_check = false; // set true if we are upset | |
2070 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2071 // Evaluate only relevant dependencies. | |
2072 if (deps.spot_check_dependency_at(changes) != NULL) { | |
2073 found_check = true; | |
2074 NOT_DEBUG(break); | |
2075 } | |
2076 } | |
2077 return found_check; | |
2078 } | |
2079 | |
2080 bool nmethod::is_evol_dependent_on(klassOop dependee) { | |
2081 instanceKlass *dependee_ik = instanceKlass::cast(dependee); | |
2082 objArrayOop dependee_methods = dependee_ik->methods(); | |
2083 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2084 if (deps.type() == Dependencies::evol_method) { | |
2085 methodOop method = deps.method_argument(0); | |
2086 for (int j = 0; j < dependee_methods->length(); j++) { | |
2087 if ((methodOop) dependee_methods->obj_at(j) == method) { | |
2088 // RC_TRACE macro has an embedded ResourceMark | |
2089 RC_TRACE(0x01000000, | |
2090 ("Found evol dependency of nmethod %s.%s(%s) compile_id=%d on method %s.%s(%s)", | |
2091 _method->method_holder()->klass_part()->external_name(), | |
2092 _method->name()->as_C_string(), | |
2093 _method->signature()->as_C_string(), compile_id(), | |
2094 method->method_holder()->klass_part()->external_name(), | |
2095 method->name()->as_C_string(), | |
2096 method->signature()->as_C_string())); | |
2097 if (TraceDependencies || LogCompilation) | |
2098 deps.log_dependency(dependee); | |
2099 return true; | |
2100 } | |
2101 } | |
2102 } | |
2103 } | |
2104 return false; | |
2105 } | |
2106 | |
2107 // Called from mark_for_deoptimization, when dependee is invalidated. | |
2108 bool nmethod::is_dependent_on_method(methodOop dependee) { | |
2109 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2110 if (deps.type() != Dependencies::evol_method) | |
2111 continue; | |
2112 methodOop method = deps.method_argument(0); | |
2113 if (method == dependee) return true; | |
2114 } | |
2115 return false; | |
2116 } | |
2117 | |
2118 | |
2119 bool nmethod::is_patchable_at(address instr_addr) { | |
1748 | 2120 assert(insts_contains(instr_addr), "wrong nmethod used"); |
0 | 2121 if (is_zombie()) { |
2122 // a zombie may never be patched | |
2123 return false; | |
2124 } | |
2125 return true; | |
2126 } | |
2127 | |
2128 | |
2129 address nmethod::continuation_for_implicit_exception(address pc) { | |
2130 // Exception happened outside inline-cache check code => we are inside | |
2131 // an active nmethod => use cpc to determine a return address | |
1748 | 2132 int exception_offset = pc - code_begin(); |
0 | 2133 int cont_offset = ImplicitExceptionTable(this).at( exception_offset ); |
2134 #ifdef ASSERT | |
2135 if (cont_offset == 0) { | |
2136 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
2137 ResetNoHandleMark rnm; // Might be called from LEAF/QUICK ENTRY | |
2138 HandleMark hm(thread); | |
2139 ResourceMark rm(thread); | |
2140 CodeBlob* cb = CodeCache::find_blob(pc); | |
2141 assert(cb != NULL && cb == this, ""); | |
2142 tty->print_cr("implicit exception happened at " INTPTR_FORMAT, pc); | |
2143 print(); | |
2144 method()->print_codes(); | |
2145 print_code(); | |
2146 print_pcs(); | |
2147 } | |
2148 #endif | |
1250 | 2149 if (cont_offset == 0) { |
2150 // Let the normal error handling report the exception | |
2151 return NULL; | |
2152 } | |
1748 | 2153 return code_begin() + cont_offset; |
0 | 2154 } |
2155 | |
2156 | |
2157 | |
2158 void nmethod_init() { | |
2159 // make sure you didn't forget to adjust the filler fields | |
2160 assert(sizeof(nmethod) % oopSize == 0, "nmethod size must be multiple of a word"); | |
2161 } | |
2162 | |
2163 | |
2164 //------------------------------------------------------------------------------------------- | |
2165 | |
2166 | |
2167 // QQQ might we make this work from a frame?? | |
2168 nmethodLocker::nmethodLocker(address pc) { | |
2169 CodeBlob* cb = CodeCache::find_blob(pc); | |
2170 guarantee(cb != NULL && cb->is_nmethod(), "bad pc for a nmethod found"); | |
2171 _nm = (nmethod*)cb; | |
2172 lock_nmethod(_nm); | |
2173 } | |
2174 | |
2342
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2175 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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2176 // should pass zombie_ok == true. |
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2177 void nmethodLocker::lock_nmethod(nmethod* nm, bool zombie_ok) { |
0 | 2178 if (nm == NULL) return; |
2179 Atomic::inc(&nm->_lock_count); | |
2342
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2180 guarantee(zombie_ok || !nm->is_zombie(), "cannot lock a zombie method"); |
0 | 2181 } |
2182 | |
2183 void nmethodLocker::unlock_nmethod(nmethod* nm) { | |
2184 if (nm == NULL) return; | |
2185 Atomic::dec(&nm->_lock_count); | |
2186 guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock"); | |
2187 } | |
2188 | |
1204 | 2189 |
2190 // ----------------------------------------------------------------------------- | |
2191 // nmethod::get_deopt_original_pc | |
2192 // | |
2193 // Return the original PC for the given PC if: | |
2194 // (a) the given PC belongs to a nmethod and | |
2195 // (b) it is a deopt PC | |
2196 address nmethod::get_deopt_original_pc(const frame* fr) { | |
2197 if (fr->cb() == NULL) return NULL; | |
2198 | |
2199 nmethod* nm = fr->cb()->as_nmethod_or_null(); | |
2200 if (nm != NULL && nm->is_deopt_pc(fr->pc())) | |
2201 return nm->get_original_pc(fr); | |
2202 | |
2203 return NULL; | |
0 | 2204 } |
2205 | |
2206 | |
2207 // ----------------------------------------------------------------------------- | |
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2208 // MethodHandle |
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2209 |
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2210 bool nmethod::is_method_handle_return(address return_pc) { |
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2211 if (!has_method_handle_invokes()) return false; |
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2212 PcDesc* pd = pc_desc_at(return_pc); |
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2213 if (pd == NULL) |
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2214 return false; |
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2215 return pd->is_method_handle_invoke(); |
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2216 } |
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2217 |
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2218 |
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2219 // ----------------------------------------------------------------------------- |
0 | 2220 // Verification |
2221 | |
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2222 class VerifyOopsClosure: public OopClosure { |
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2223 nmethod* _nm; |
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2224 bool _ok; |
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2225 public: |
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2226 VerifyOopsClosure(nmethod* nm) : _nm(nm), _ok(true) { } |
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2227 bool ok() { return _ok; } |
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2228 virtual void do_oop(oop* p) { |
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2229 if ((*p) == NULL || (*p)->is_oop()) return; |
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2230 if (_ok) { |
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2231 _nm->print_nmethod(true); |
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2232 _ok = false; |
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2233 } |
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2234 tty->print_cr("*** non-oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2235 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2236 } |
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2237 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2238 }; |
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2239 |
0 | 2240 void nmethod::verify() { |
2241 | |
2242 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | |
2243 // seems odd. | |
2244 | |
2245 if( is_zombie() || is_not_entrant() ) | |
2246 return; | |
2247 | |
2248 // Make sure all the entry points are correctly aligned for patching. | |
2249 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | |
2250 | |
2251 assert(method()->is_oop(), "must be valid"); | |
2252 | |
2253 ResourceMark rm; | |
2254 | |
2255 if (!CodeCache::contains(this)) { | |
1490
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2256 fatal(err_msg("nmethod at " INTPTR_FORMAT " not in zone", this)); |
0 | 2257 } |
2258 | |
2259 if(is_native_method() ) | |
2260 return; | |
2261 | |
2262 nmethod* nm = CodeCache::find_nmethod(verified_entry_point()); | |
2263 if (nm != this) { | |
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2264 fatal(err_msg("findNMethod did not find this nmethod (" INTPTR_FORMAT ")", |
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2265 this)); |
0 | 2266 } |
2267 | |
2268 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2269 if (! p->verify(this)) { | |
2270 tty->print_cr("\t\tin nmethod at " INTPTR_FORMAT " (pcs)", this); | |
2271 } | |
2272 } | |
2273 | |
989
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2274 VerifyOopsClosure voc(this); |
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2275 oops_do(&voc); |
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2276 assert(voc.ok(), "embedded oops must be OK"); |
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2277 verify_scavenge_root_oops(); |
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2278 |
0 | 2279 verify_scopes(); |
2280 } | |
2281 | |
2282 | |
2283 void nmethod::verify_interrupt_point(address call_site) { | |
2284 // This code does not work in release mode since | |
2285 // owns_lock only is available in debug mode. | |
2286 CompiledIC* ic = NULL; | |
2287 Thread *cur = Thread::current(); | |
2288 if (CompiledIC_lock->owner() == cur || | |
2289 ((cur->is_VM_thread() || cur->is_ConcurrentGC_thread()) && | |
2290 SafepointSynchronize::is_at_safepoint())) { | |
2291 ic = CompiledIC_at(call_site); | |
2292 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
2293 } else { | |
2294 MutexLocker ml_verify (CompiledIC_lock); | |
2295 ic = CompiledIC_at(call_site); | |
2296 } | |
2297 PcDesc* pd = pc_desc_at(ic->end_of_call()); | |
2298 assert(pd != NULL, "PcDesc must exist"); | |
2299 for (ScopeDesc* sd = new ScopeDesc(this, pd->scope_decode_offset(), | |
1253
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2300 pd->obj_decode_offset(), pd->should_reexecute(), |
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2301 pd->return_oop()); |
0 | 2302 !sd->is_top(); sd = sd->sender()) { |
2303 sd->verify(); | |
2304 } | |
2305 } | |
2306 | |
2307 void nmethod::verify_scopes() { | |
2308 if( !method() ) return; // Runtime stubs have no scope | |
2309 if (method()->is_native()) return; // Ignore stub methods. | |
2310 // iterate through all interrupt point | |
2311 // and verify the debug information is valid. | |
2312 RelocIterator iter((nmethod*)this); | |
2313 while (iter.next()) { | |
2314 address stub = NULL; | |
2315 switch (iter.type()) { | |
2316 case relocInfo::virtual_call_type: | |
2317 verify_interrupt_point(iter.addr()); | |
2318 break; | |
2319 case relocInfo::opt_virtual_call_type: | |
2320 stub = iter.opt_virtual_call_reloc()->static_stub(); | |
2321 verify_interrupt_point(iter.addr()); | |
2322 break; | |
2323 case relocInfo::static_call_type: | |
2324 stub = iter.static_call_reloc()->static_stub(); | |
2325 //verify_interrupt_point(iter.addr()); | |
2326 break; | |
2327 case relocInfo::runtime_call_type: | |
2328 address destination = iter.reloc()->value(); | |
2329 // Right now there is no way to find out which entries support | |
2330 // an interrupt point. It would be nice if we had this | |
2331 // information in a table. | |
2332 break; | |
2333 } | |
2334 assert(stub == NULL || stub_contains(stub), "static call stub outside stub section"); | |
2335 } | |
2336 } | |
2337 | |
2338 | |
2339 // ----------------------------------------------------------------------------- | |
2340 // Non-product code | |
2341 #ifndef PRODUCT | |
2342 | |
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2343 class DebugScavengeRoot: public OopClosure { |
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2344 nmethod* _nm; |
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2345 bool _ok; |
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2346 public: |
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2347 DebugScavengeRoot(nmethod* nm) : _nm(nm), _ok(true) { } |
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2348 bool ok() { return _ok; } |
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2349 virtual void do_oop(oop* p) { |
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2350 if ((*p) == NULL || !(*p)->is_scavengable()) return; |
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2351 if (_ok) { |
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2352 _nm->print_nmethod(true); |
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2353 _ok = false; |
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2354 } |
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2355 tty->print_cr("*** non-perm oop "PTR_FORMAT" found at "PTR_FORMAT" (offset %d)", |
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2356 (intptr_t)(*p), (intptr_t)p, (int)((intptr_t)p - (intptr_t)_nm)); |
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2357 (*p)->print(); |
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|
2358 } |
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2359 virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
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2360 }; |
0 | 2361 |
989
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2362 void nmethod::verify_scavenge_root_oops() { |
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2363 if (!on_scavenge_root_list()) { |
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2364 // Actually look inside, to verify the claim that it's clean. |
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2365 DebugScavengeRoot debug_scavenge_root(this); |
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2366 oops_do(&debug_scavenge_root); |
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2367 if (!debug_scavenge_root.ok()) |
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2368 fatal("found an unadvertised bad non-perm oop in the code cache"); |
0 | 2369 } |
989
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2370 assert(scavenge_root_not_marked(), ""); |
0 | 2371 } |
2372 | |
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2373 #endif // PRODUCT |
0 | 2374 |
2375 // Printing operations | |
2376 | |
2377 void nmethod::print() const { | |
2378 ResourceMark rm; | |
2379 ttyLocker ttyl; // keep the following output all in one block | |
2380 | |
2381 tty->print("Compiled "); | |
2382 | |
2383 if (is_compiled_by_c1()) { | |
2384 tty->print("(c1) "); | |
2385 } else if (is_compiled_by_c2()) { | |
2386 tty->print("(c2) "); | |
1692 | 2387 } else if (is_compiled_by_shark()) { |
2388 tty->print("(shark) "); | |
0 | 2389 } else { |
2390 tty->print("(nm) "); | |
2391 } | |
2392 | |
2393 print_on(tty, "nmethod"); | |
2394 tty->cr(); | |
2395 if (WizardMode) { | |
2396 tty->print("((nmethod*) "INTPTR_FORMAT ") ", this); | |
2397 tty->print(" for method " INTPTR_FORMAT , (address)method()); | |
2398 tty->print(" { "); | |
2399 if (is_in_use()) tty->print("in_use "); | |
2400 if (is_not_entrant()) tty->print("not_entrant "); | |
2401 if (is_zombie()) tty->print("zombie "); | |
2402 if (is_unloaded()) tty->print("unloaded "); | |
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2403 if (on_scavenge_root_list()) tty->print("scavenge_root "); |
0 | 2404 tty->print_cr("}:"); |
2405 } | |
2406 if (size () > 0) tty->print_cr(" total in heap [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2407 (address)this, | |
2408 (address)this + size(), | |
2409 size()); | |
2410 if (relocation_size () > 0) tty->print_cr(" relocation [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2411 relocation_begin(), | |
2412 relocation_end(), | |
2413 relocation_size()); | |
1762
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2414 if (consts_size () > 0) tty->print_cr(" constants [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2415 consts_begin(), |
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|
2416 consts_end(), |
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|
2417 consts_size()); |
1748 | 2418 if (insts_size () > 0) tty->print_cr(" main code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2419 insts_begin(), | |
2420 insts_end(), | |
2421 insts_size()); | |
0 | 2422 if (stub_size () > 0) tty->print_cr(" stub code [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2423 stub_begin(), | |
2424 stub_end(), | |
2425 stub_size()); | |
1563
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2426 if (oops_size () > 0) tty->print_cr(" oops [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
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|
2427 oops_begin(), |
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|
2428 oops_end(), |
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|
2429 oops_size()); |
0 | 2430 if (scopes_data_size () > 0) tty->print_cr(" scopes data [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", |
2431 scopes_data_begin(), | |
2432 scopes_data_end(), | |
2433 scopes_data_size()); | |
2434 if (scopes_pcs_size () > 0) tty->print_cr(" scopes pcs [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2435 scopes_pcs_begin(), | |
2436 scopes_pcs_end(), | |
2437 scopes_pcs_size()); | |
2438 if (dependencies_size () > 0) tty->print_cr(" dependencies [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2439 dependencies_begin(), | |
2440 dependencies_end(), | |
2441 dependencies_size()); | |
2442 if (handler_table_size() > 0) tty->print_cr(" handler table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2443 handler_table_begin(), | |
2444 handler_table_end(), | |
2445 handler_table_size()); | |
2446 if (nul_chk_table_size() > 0) tty->print_cr(" nul chk table [" INTPTR_FORMAT "," INTPTR_FORMAT "] = %d", | |
2447 nul_chk_table_begin(), | |
2448 nul_chk_table_end(), | |
2449 nul_chk_table_size()); | |
2450 } | |
2451 | |
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2452 void nmethod::print_code() { |
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|
2453 HandleMark hm; |
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|
2454 ResourceMark m; |
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|
2455 Disassembler::decode(this); |
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|
2456 } |
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|
2457 |
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2458 |
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|
2459 #ifndef PRODUCT |
0 | 2460 |
2461 void nmethod::print_scopes() { | |
2462 // Find the first pc desc for all scopes in the code and print it. | |
2463 ResourceMark rm; | |
2464 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2465 if (p->scope_decode_offset() == DebugInformationRecorder::serialized_null) | |
2466 continue; | |
2467 | |
2468 ScopeDesc* sd = scope_desc_at(p->real_pc(this)); | |
2469 sd->print_on(tty, p); | |
2470 } | |
2471 } | |
2472 | |
2473 void nmethod::print_dependencies() { | |
2474 ResourceMark rm; | |
2475 ttyLocker ttyl; // keep the following output all in one block | |
2476 tty->print_cr("Dependencies:"); | |
2477 for (Dependencies::DepStream deps(this); deps.next(); ) { | |
2478 deps.print_dependency(); | |
2479 klassOop ctxk = deps.context_type(); | |
2480 if (ctxk != NULL) { | |
2481 Klass* k = Klass::cast(ctxk); | |
2482 if (k->oop_is_instance() && ((instanceKlass*)k)->is_dependent_nmethod(this)) { | |
30 | 2483 tty->print_cr(" [nmethod<=klass]%s", k->external_name()); |
0 | 2484 } |
2485 } | |
2486 deps.log_dependency(); // put it into the xml log also | |
2487 } | |
2488 } | |
2489 | |
2490 | |
2491 void nmethod::print_relocations() { | |
2492 ResourceMark m; // in case methods get printed via the debugger | |
2493 tty->print_cr("relocations:"); | |
2494 RelocIterator iter(this); | |
2495 iter.print(); | |
2496 if (UseRelocIndex) { | |
2497 jint* index_end = (jint*)relocation_end() - 1; | |
2498 jint index_size = *index_end; | |
2499 jint* index_start = (jint*)( (address)index_end - index_size ); | |
2500 tty->print_cr(" index @" INTPTR_FORMAT ": index_size=%d", index_start, index_size); | |
2501 if (index_size > 0) { | |
2502 jint* ip; | |
2503 for (ip = index_start; ip+2 <= index_end; ip += 2) | |
2504 tty->print_cr(" (%d %d) addr=" INTPTR_FORMAT " @" INTPTR_FORMAT, | |
2505 ip[0], | |
2506 ip[1], | |
2507 header_end()+ip[0], | |
2508 relocation_begin()-1+ip[1]); | |
2509 for (; ip < index_end; ip++) | |
2510 tty->print_cr(" (%d ?)", ip[0]); | |
2511 tty->print_cr(" @" INTPTR_FORMAT ": index_size=%d", ip, *ip++); | |
2512 tty->print_cr("reloc_end @" INTPTR_FORMAT ":", ip); | |
2513 } | |
2514 } | |
2515 } | |
2516 | |
2517 | |
2518 void nmethod::print_pcs() { | |
2519 ResourceMark m; // in case methods get printed via debugger | |
2520 tty->print_cr("pc-bytecode offsets:"); | |
2521 for (PcDesc* p = scopes_pcs_begin(); p < scopes_pcs_end(); p++) { | |
2522 p->print(this); | |
2523 } | |
2524 } | |
2525 | |
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2526 #endif // PRODUCT |
0 | 2527 |
2528 const char* nmethod::reloc_string_for(u_char* begin, u_char* end) { | |
2529 RelocIterator iter(this, begin, end); | |
2530 bool have_one = false; | |
2531 while (iter.next()) { | |
2532 have_one = true; | |
2533 switch (iter.type()) { | |
2534 case relocInfo::none: return "no_reloc"; | |
2535 case relocInfo::oop_type: { | |
2536 stringStream st; | |
2537 oop_Relocation* r = iter.oop_reloc(); | |
2538 oop obj = r->oop_value(); | |
2539 st.print("oop("); | |
2540 if (obj == NULL) st.print("NULL"); | |
2541 else obj->print_value_on(&st); | |
2542 st.print(")"); | |
2543 return st.as_string(); | |
2544 } | |
2545 case relocInfo::virtual_call_type: return "virtual_call"; | |
2546 case relocInfo::opt_virtual_call_type: return "optimized virtual_call"; | |
2547 case relocInfo::static_call_type: return "static_call"; | |
2548 case relocInfo::static_stub_type: return "static_stub"; | |
2549 case relocInfo::runtime_call_type: return "runtime_call"; | |
2550 case relocInfo::external_word_type: return "external_word"; | |
2551 case relocInfo::internal_word_type: return "internal_word"; | |
2552 case relocInfo::section_word_type: return "section_word"; | |
2553 case relocInfo::poll_type: return "poll"; | |
2554 case relocInfo::poll_return_type: return "poll_return"; | |
2555 case relocInfo::type_mask: return "type_bit_mask"; | |
2556 } | |
2557 } | |
2558 return have_one ? "other" : NULL; | |
2559 } | |
2560 | |
2561 // Return a the last scope in (begin..end] | |
2562 ScopeDesc* nmethod::scope_desc_in(address begin, address end) { | |
2563 PcDesc* p = pc_desc_near(begin+1); | |
2564 if (p != NULL && p->real_pc(this) <= end) { | |
2565 return new ScopeDesc(this, p->scope_decode_offset(), | |
1253
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2566 p->obj_decode_offset(), p->should_reexecute(), |
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|
2567 p->return_oop()); |
0 | 2568 } |
2569 return NULL; | |
2570 } | |
2571 | |
1155
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2572 void nmethod::print_nmethod_labels(outputStream* stream, address block_begin) { |
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2573 if (block_begin == entry_point()) stream->print_cr("[Entry Point]"); |
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2574 if (block_begin == verified_entry_point()) stream->print_cr("[Verified Entry Point]"); |
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2575 if (block_begin == exception_begin()) stream->print_cr("[Exception Handler]"); |
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2576 if (block_begin == stub_begin()) stream->print_cr("[Stub Code]"); |
1204 | 2577 if (block_begin == deopt_handler_begin()) stream->print_cr("[Deopt Handler Code]"); |
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diff
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|
2578 |
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|
2579 if (has_method_handle_invokes()) |
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diff
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|
2580 if (block_begin == deopt_mh_handler_begin()) stream->print_cr("[Deopt MH Handler Code]"); |
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|
2581 |
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2582 if (block_begin == consts_begin()) stream->print_cr("[Constants]"); |
1691
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|
2583 |
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2584 if (block_begin == entry_point()) { |
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|
2585 methodHandle m = method(); |
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|
2586 if (m.not_null()) { |
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|
2587 stream->print(" # "); |
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|
2588 m->print_value_on(stream); |
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|
2589 stream->cr(); |
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|
2590 } |
4e6abf09f540
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|
2591 if (m.not_null() && !is_osr_method()) { |
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diff
changeset
|
2592 ResourceMark rm; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2593 int sizeargs = m->size_of_parameters(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2594 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2595 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
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jrose
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diff
changeset
|
2596 { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2597 int sig_index = 0; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2598 if (!m->is_static()) |
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changeset
|
2599 sig_bt[sig_index++] = T_OBJECT; // 'this' |
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diff
changeset
|
2600 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { |
4e6abf09f540
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diff
changeset
|
2601 BasicType t = ss.type(); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
2602 sig_bt[sig_index++] = t; |
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diff
changeset
|
2603 if (type2size[t] == 2) { |
4e6abf09f540
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diff
changeset
|
2604 sig_bt[sig_index++] = T_VOID; |
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diff
changeset
|
2605 } else { |
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diff
changeset
|
2606 assert(type2size[t] == 1, "size is 1 or 2"); |
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changeset
|
2607 } |
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changeset
|
2608 } |
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changeset
|
2609 assert(sig_index == sizeargs, ""); |
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changeset
|
2610 } |
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changeset
|
2611 const char* spname = "sp"; // make arch-specific? |
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diff
changeset
|
2612 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, false); |
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changeset
|
2613 int stack_slot_offset = this->frame_size() * wordSize; |
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changeset
|
2614 int tab1 = 14, tab2 = 24; |
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diff
changeset
|
2615 int sig_index = 0; |
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diff
changeset
|
2616 int arg_index = (m->is_static() ? 0 : -1); |
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changeset
|
2617 bool did_old_sp = false; |
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changeset
|
2618 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { |
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diff
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|
2619 bool at_this = (arg_index == -1); |
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changeset
|
2620 bool at_old_sp = false; |
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diff
changeset
|
2621 BasicType t = (at_this ? T_OBJECT : ss.type()); |
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diff
changeset
|
2622 assert(t == sig_bt[sig_index], "sigs in sync"); |
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diff
changeset
|
2623 if (at_this) |
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diff
changeset
|
2624 stream->print(" # this: "); |
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diff
changeset
|
2625 else |
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diff
changeset
|
2626 stream->print(" # parm%d: ", arg_index); |
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changeset
|
2627 stream->move_to(tab1); |
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|
2628 VMReg fst = regs[sig_index].first(); |
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diff
changeset
|
2629 VMReg snd = regs[sig_index].second(); |
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diff
changeset
|
2630 if (fst->is_reg()) { |
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diff
changeset
|
2631 stream->print("%s", fst->name()); |
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diff
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|
2632 if (snd->is_valid()) { |
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diff
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|
2633 stream->print(":%s", snd->name()); |
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diff
changeset
|
2634 } |
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|
2635 } else if (fst->is_stack()) { |
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diff
changeset
|
2636 int offset = fst->reg2stack() * VMRegImpl::stack_slot_size + stack_slot_offset; |
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diff
changeset
|
2637 if (offset == stack_slot_offset) at_old_sp = true; |
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diff
changeset
|
2638 stream->print("[%s+0x%x]", spname, offset); |
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diff
changeset
|
2639 } else { |
4e6abf09f540
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diff
changeset
|
2640 stream->print("reg%d:%d??", (int)(intptr_t)fst, (int)(intptr_t)snd); |
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diff
changeset
|
2641 } |
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diff
changeset
|
2642 stream->print(" "); |
4e6abf09f540
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diff
changeset
|
2643 stream->move_to(tab2); |
4e6abf09f540
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diff
changeset
|
2644 stream->print("= "); |
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diff
changeset
|
2645 if (at_this) { |
4e6abf09f540
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diff
changeset
|
2646 m->method_holder()->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2647 } else { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2648 bool did_name = false; |
4e6abf09f540
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diff
changeset
|
2649 if (!at_this && ss.is_object()) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2142
diff
changeset
|
2650 Symbol* name = ss.as_symbol_or_null(); |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
2651 if (name != NULL) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2652 name->print_value_on(stream); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2653 did_name = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2654 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2655 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2656 if (!did_name) |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2657 stream->print("%s", type2name(t)); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2658 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
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1141
diff
changeset
|
2659 if (at_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2660 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2661 did_old_sp = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2662 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2663 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2664 sig_index += type2size[t]; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2665 arg_index += 1; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2666 if (!at_this) ss.next(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2667 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2668 if (!did_old_sp) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2669 stream->print(" # "); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2670 stream->move_to(tab1); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2671 stream->print("[%s+0x%x]", spname, stack_slot_offset); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2672 stream->print(" (%s of caller)", spname); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2673 stream->cr(); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2674 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2675 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2676 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1141
diff
changeset
|
2677 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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1141
diff
changeset
|
2678 |
0 | 2679 void nmethod::print_code_comment_on(outputStream* st, int column, u_char* begin, u_char* end) { |
2680 // First, find an oopmap in (begin, end]. | |
2681 // We use the odd half-closed interval so that oop maps and scope descs | |
2682 // which are tied to the byte after a call are printed with the call itself. | |
1748 | 2683 address base = code_begin(); |
0 | 2684 OopMapSet* oms = oop_maps(); |
2685 if (oms != NULL) { | |
2686 for (int i = 0, imax = oms->size(); i < imax; i++) { | |
2687 OopMap* om = oms->at(i); | |
2688 address pc = base + om->offset(); | |
2689 if (pc > begin) { | |
2690 if (pc <= end) { | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2691 st->move_to(column); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2692 st->print("; "); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
30
diff
changeset
|
2693 om->print_on(st); |
0 | 2694 } |
2695 break; | |
2696 } | |
2697 } | |
2698 } | |
100
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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30
diff
changeset
|
2699 |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
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30
diff
changeset
|
2700 // Print any debug info present at this pc. |
0 | 2701 ScopeDesc* sd = scope_desc_in(begin, end); |
2702 if (sd != NULL) { | |
100
c7c777385a15
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30
diff
changeset
|
2703 st->move_to(column); |
0 | 2704 if (sd->bci() == SynchronizationEntryBCI) { |
2705 st->print(";*synchronization entry"); | |
2706 } else { | |
2707 if (sd->method().is_null()) { | |
100
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diff
changeset
|
2708 st->print("method is NULL"); |
0 | 2709 } else if (sd->method()->is_native()) { |
100
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diff
changeset
|
2710 st->print("method is native"); |
0 | 2711 } else { |
2142 | 2712 Bytecodes::Code bc = sd->method()->java_code_at(sd->bci()); |
0 | 2713 st->print(";*%s", Bytecodes::name(bc)); |
2714 switch (bc) { | |
2715 case Bytecodes::_invokevirtual: | |
2716 case Bytecodes::_invokespecial: | |
2717 case Bytecodes::_invokestatic: | |
2718 case Bytecodes::_invokeinterface: | |
2719 { | |
2142 | 2720 Bytecode_invoke invoke(sd->method(), sd->bci()); |
0 | 2721 st->print(" "); |
2142 | 2722 if (invoke.name() != NULL) |
2723 invoke.name()->print_symbol_on(st); | |
0 | 2724 else |
2725 st->print("<UNKNOWN>"); | |
2726 break; | |
2727 } | |
2728 case Bytecodes::_getfield: | |
2729 case Bytecodes::_putfield: | |
2730 case Bytecodes::_getstatic: | |
2731 case Bytecodes::_putstatic: | |
2732 { | |
2142 | 2733 Bytecode_field field(sd->method(), sd->bci()); |
0 | 2734 st->print(" "); |
2142 | 2735 if (field.name() != NULL) |
2736 field.name()->print_symbol_on(st); | |
0 | 2737 else |
2738 st->print("<UNKNOWN>"); | |
2739 } | |
2740 } | |
2741 } | |
2742 } | |
100
c7c777385a15
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diff
changeset
|
2743 |
0 | 2744 // Print all scopes |
2745 for (;sd != NULL; sd = sd->sender()) { | |
100
c7c777385a15
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diff
changeset
|
2746 st->move_to(column); |
0 | 2747 st->print("; -"); |
2748 if (sd->method().is_null()) { | |
100
c7c777385a15
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diff
changeset
|
2749 st->print("method is NULL"); |
0 | 2750 } else { |
2751 sd->method()->print_short_name(st); | |
2752 } | |
2753 int lineno = sd->method()->line_number_from_bci(sd->bci()); | |
2754 if (lineno != -1) { | |
2755 st->print("@%d (line %d)", sd->bci(), lineno); | |
2756 } else { | |
2757 st->print("@%d", sd->bci()); | |
2758 } | |
2759 st->cr(); | |
2760 } | |
2761 } | |
2762 | |
2763 // Print relocation information | |
2764 const char* str = reloc_string_for(begin, end); | |
2765 if (str != NULL) { | |
2766 if (sd != NULL) st->cr(); | |
100
c7c777385a15
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jrose
parents:
30
diff
changeset
|
2767 st->move_to(column); |
0 | 2768 st->print("; {%s}", str); |
2769 } | |
1748 | 2770 int cont_offset = ImplicitExceptionTable(this).at(begin - code_begin()); |
0 | 2771 if (cont_offset != 0) { |
100
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diff
changeset
|
2772 st->move_to(column); |
1748 | 2773 st->print("; implicit exception: dispatches to " INTPTR_FORMAT, code_begin() + cont_offset); |
0 | 2774 } |
2775 | |
2776 } | |
2777 | |
100
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6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2778 #ifndef PRODUCT |
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6667042: PrintAssembly option does not work without special plugin
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diff
changeset
|
2779 |
0 | 2780 void nmethod::print_value_on(outputStream* st) const { |
2781 print_on(st, "nmethod"); | |
2782 } | |
2783 | |
2784 void nmethod::print_calls(outputStream* st) { | |
2785 RelocIterator iter(this); | |
2786 while (iter.next()) { | |
2787 switch (iter.type()) { | |
2788 case relocInfo::virtual_call_type: | |
2789 case relocInfo::opt_virtual_call_type: { | |
2790 VerifyMutexLocker mc(CompiledIC_lock); | |
2791 CompiledIC_at(iter.reloc())->print(); | |
2792 break; | |
2793 } | |
2794 case relocInfo::static_call_type: | |
2795 st->print_cr("Static call at " INTPTR_FORMAT, iter.reloc()->addr()); | |
2796 compiledStaticCall_at(iter.reloc())->print(); | |
2797 break; | |
2798 } | |
2799 } | |
2800 } | |
2801 | |
2802 void nmethod::print_handler_table() { | |
2803 ExceptionHandlerTable(this).print(); | |
2804 } | |
2805 | |
2806 void nmethod::print_nul_chk_table() { | |
1748 | 2807 ImplicitExceptionTable(this).print(code_begin()); |
0 | 2808 } |
2809 | |
2810 void nmethod::print_statistics() { | |
2811 ttyLocker ttyl; | |
2812 if (xtty != NULL) xtty->head("statistics type='nmethod'"); | |
2813 nmethod_stats.print_native_nmethod_stats(); | |
2814 nmethod_stats.print_nmethod_stats(); | |
2815 DebugInformationRecorder::print_statistics(); | |
2816 nmethod_stats.print_pc_stats(); | |
2817 Dependencies::print_statistics(); | |
2818 if (xtty != NULL) xtty->tail("statistics"); | |
2819 } | |
2820 | |
2821 #endif // PRODUCT |