Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/codeCache.cpp @ 14397:53fa76359eb1
8016696: PPC64 (part 4): add relocation for trampoline stubs
Summary: A trampoline allows to encode a small branch in the code, even if there is the chance that this branch can not reach all possible code locations. If the relocation finds that a branch is too far for the instruction in the code, it can patch it to jump to the trampoline where is sufficient space for a far branch. Needed on PPC.
Reviewed-by: kvn, bdelsart, jrose
author | goetz |
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date | Thu, 04 Jul 2013 10:51:31 +0200 |
parents | f2110083203d |
children | 836a62f43af9 510fbd28919c |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 1997, 2013, 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/codeBlob.hpp" | |
27 #include "code/codeCache.hpp" | |
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28 #include "code/compiledIC.hpp" |
1972 | 29 #include "code/dependencies.hpp" |
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30 #include "code/icBuffer.hpp" |
1972 | 31 #include "code/nmethod.hpp" |
32 #include "code/pcDesc.hpp" | |
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33 #include "compiler/compileBroker.hpp" |
1972 | 34 #include "gc_implementation/shared/markSweep.hpp" |
35 #include "memory/allocation.inline.hpp" | |
36 #include "memory/gcLocker.hpp" | |
37 #include "memory/iterator.hpp" | |
38 #include "memory/resourceArea.hpp" | |
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39 #include "oops/method.hpp" |
1972 | 40 #include "oops/objArrayOop.hpp" |
41 #include "oops/oop.inline.hpp" | |
42 #include "runtime/handles.inline.hpp" | |
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43 #include "runtime/arguments.hpp" |
1972 | 44 #include "runtime/icache.hpp" |
45 #include "runtime/java.hpp" | |
46 #include "runtime/mutexLocker.hpp" | |
47 #include "services/memoryService.hpp" | |
10405 | 48 #include "trace/tracing.hpp" |
1972 | 49 #include "utilities/xmlstream.hpp" |
0 | 50 |
51 // Helper class for printing in CodeCache | |
52 | |
53 class CodeBlob_sizes { | |
54 private: | |
55 int count; | |
56 int total_size; | |
57 int header_size; | |
58 int code_size; | |
59 int stub_size; | |
60 int relocation_size; | |
61 int scopes_oop_size; | |
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62 int scopes_metadata_size; |
0 | 63 int scopes_data_size; |
64 int scopes_pcs_size; | |
65 | |
66 public: | |
67 CodeBlob_sizes() { | |
68 count = 0; | |
69 total_size = 0; | |
70 header_size = 0; | |
71 code_size = 0; | |
72 stub_size = 0; | |
73 relocation_size = 0; | |
74 scopes_oop_size = 0; | |
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75 scopes_metadata_size = 0; |
0 | 76 scopes_data_size = 0; |
77 scopes_pcs_size = 0; | |
78 } | |
79 | |
80 int total() { return total_size; } | |
81 bool is_empty() { return count == 0; } | |
82 | |
83 void print(const char* title) { | |
84 tty->print_cr(" #%d %s = %dK (hdr %d%%, loc %d%%, code %d%%, stub %d%%, [oops %d%%, data %d%%, pcs %d%%])", | |
85 count, | |
86 title, | |
87 total() / K, | |
88 header_size * 100 / total_size, | |
89 relocation_size * 100 / total_size, | |
90 code_size * 100 / total_size, | |
91 stub_size * 100 / total_size, | |
92 scopes_oop_size * 100 / total_size, | |
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93 scopes_metadata_size * 100 / total_size, |
0 | 94 scopes_data_size * 100 / total_size, |
95 scopes_pcs_size * 100 / total_size); | |
96 } | |
97 | |
98 void add(CodeBlob* cb) { | |
99 count++; | |
100 total_size += cb->size(); | |
101 header_size += cb->header_size(); | |
102 relocation_size += cb->relocation_size(); | |
103 if (cb->is_nmethod()) { | |
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104 nmethod* nm = cb->as_nmethod_or_null(); |
1748 | 105 code_size += nm->insts_size(); |
0 | 106 stub_size += nm->stub_size(); |
107 | |
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108 scopes_oop_size += nm->oops_size(); |
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109 scopes_metadata_size += nm->metadata_size(); |
0 | 110 scopes_data_size += nm->scopes_data_size(); |
111 scopes_pcs_size += nm->scopes_pcs_size(); | |
112 } else { | |
1748 | 113 code_size += cb->code_size(); |
0 | 114 } |
115 } | |
116 }; | |
117 | |
118 // CodeCache implementation | |
119 | |
120 CodeHeap * CodeCache::_heap = new CodeHeap(); | |
121 int CodeCache::_number_of_blobs = 0; | |
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122 int CodeCache::_number_of_adapters = 0; |
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123 int CodeCache::_number_of_nmethods = 0; |
0 | 124 int CodeCache::_number_of_nmethods_with_dependencies = 0; |
125 bool CodeCache::_needs_cache_clean = false; | |
989 | 126 nmethod* CodeCache::_scavenge_root_nmethods = NULL; |
1202 | 127 nmethod* CodeCache::_saved_nmethods = NULL; |
0 | 128 |
10405 | 129 int CodeCache::_codemem_full_count = 0; |
0 | 130 |
131 CodeBlob* CodeCache::first() { | |
132 assert_locked_or_safepoint(CodeCache_lock); | |
133 return (CodeBlob*)_heap->first(); | |
134 } | |
135 | |
136 | |
137 CodeBlob* CodeCache::next(CodeBlob* cb) { | |
138 assert_locked_or_safepoint(CodeCache_lock); | |
139 return (CodeBlob*)_heap->next(cb); | |
140 } | |
141 | |
142 | |
143 CodeBlob* CodeCache::alive(CodeBlob *cb) { | |
144 assert_locked_or_safepoint(CodeCache_lock); | |
145 while (cb != NULL && !cb->is_alive()) cb = next(cb); | |
146 return cb; | |
147 } | |
148 | |
149 | |
150 nmethod* CodeCache::alive_nmethod(CodeBlob* cb) { | |
151 assert_locked_or_safepoint(CodeCache_lock); | |
152 while (cb != NULL && (!cb->is_alive() || !cb->is_nmethod())) cb = next(cb); | |
153 return (nmethod*)cb; | |
154 } | |
155 | |
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156 nmethod* CodeCache::first_nmethod() { |
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157 assert_locked_or_safepoint(CodeCache_lock); |
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158 CodeBlob* cb = first(); |
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159 while (cb != NULL && !cb->is_nmethod()) { |
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160 cb = next(cb); |
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161 } |
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162 return (nmethod*)cb; |
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163 } |
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164 |
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165 nmethod* CodeCache::next_nmethod (CodeBlob* cb) { |
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166 assert_locked_or_safepoint(CodeCache_lock); |
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167 cb = next(cb); |
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168 while (cb != NULL && !cb->is_nmethod()) { |
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169 cb = next(cb); |
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170 } |
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171 return (nmethod*)cb; |
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172 } |
0 | 173 |
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174 static size_t maxCodeCacheUsed = 0; |
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175 |
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176 CodeBlob* CodeCache::allocate(int size, bool is_critical) { |
0 | 177 // Do not seize the CodeCache lock here--if the caller has not |
178 // already done so, we are going to lose bigtime, since the code | |
179 // cache will contain a garbage CodeBlob until the caller can | |
180 // run the constructor for the CodeBlob subclass he is busy | |
181 // instantiating. | |
182 guarantee(size >= 0, "allocation request must be reasonable"); | |
183 assert_locked_or_safepoint(CodeCache_lock); | |
184 CodeBlob* cb = NULL; | |
185 _number_of_blobs++; | |
186 while (true) { | |
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187 cb = (CodeBlob*)_heap->allocate(size, is_critical); |
0 | 188 if (cb != NULL) break; |
189 if (!_heap->expand_by(CodeCacheExpansionSize)) { | |
190 // Expansion failed | |
191 return NULL; | |
192 } | |
193 if (PrintCodeCacheExtension) { | |
194 ResourceMark rm; | |
195 tty->print_cr("code cache extended to [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", | |
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196 (intptr_t)_heap->low_boundary(), (intptr_t)_heap->high(), |
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197 (address)_heap->high() - (address)_heap->low_boundary()); |
0 | 198 } |
199 } | |
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200 maxCodeCacheUsed = MAX2(maxCodeCacheUsed, ((address)_heap->high_boundary() - |
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201 (address)_heap->low_boundary()) - unallocated_capacity()); |
0 | 202 verify_if_often(); |
989 | 203 print_trace("allocation", cb, size); |
0 | 204 return cb; |
205 } | |
206 | |
207 void CodeCache::free(CodeBlob* cb) { | |
208 assert_locked_or_safepoint(CodeCache_lock); | |
209 verify_if_often(); | |
210 | |
989 | 211 print_trace("free", cb); |
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212 if (cb->is_nmethod()) { |
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213 _number_of_nmethods--; |
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214 if (((nmethod *)cb)->has_dependencies()) { |
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215 _number_of_nmethods_with_dependencies--; |
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216 } |
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217 } |
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218 if (cb->is_adapter_blob()) { |
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219 _number_of_adapters--; |
0 | 220 } |
221 _number_of_blobs--; | |
222 | |
223 _heap->deallocate(cb); | |
224 | |
225 verify_if_often(); | |
226 assert(_number_of_blobs >= 0, "sanity check"); | |
227 } | |
228 | |
229 | |
230 void CodeCache::commit(CodeBlob* cb) { | |
231 // this is called by nmethod::nmethod, which must already own CodeCache_lock | |
232 assert_locked_or_safepoint(CodeCache_lock); | |
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233 if (cb->is_nmethod()) { |
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234 _number_of_nmethods++; |
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235 if (((nmethod *)cb)->has_dependencies()) { |
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236 _number_of_nmethods_with_dependencies++; |
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237 } |
0 | 238 } |
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239 if (cb->is_adapter_blob()) { |
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240 _number_of_adapters++; |
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241 } |
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242 |
0 | 243 // flush the hardware I-cache |
1748 | 244 ICache::invalidate_range(cb->content_begin(), cb->content_size()); |
0 | 245 } |
246 | |
247 | |
248 void CodeCache::flush() { | |
249 assert_locked_or_safepoint(CodeCache_lock); | |
250 Unimplemented(); | |
251 } | |
252 | |
253 | |
254 // Iteration over CodeBlobs | |
255 | |
256 #define FOR_ALL_BLOBS(var) for (CodeBlob *var = first() ; var != NULL; var = next(var) ) | |
257 #define FOR_ALL_ALIVE_BLOBS(var) for (CodeBlob *var = alive(first()); var != NULL; var = alive(next(var))) | |
258 #define FOR_ALL_ALIVE_NMETHODS(var) for (nmethod *var = alive_nmethod(first()); var != NULL; var = alive_nmethod(next(var))) | |
259 | |
260 | |
261 bool CodeCache::contains(void *p) { | |
262 // It should be ok to call contains without holding a lock | |
263 return _heap->contains(p); | |
264 } | |
265 | |
266 | |
267 // This method is safe to call without holding the CodeCache_lock, as long as a dead codeblob is not | |
268 // looked up (i.e., one that has been marked for deletion). It only dependes on the _segmap to contain | |
269 // valid indices, which it will always do, as long as the CodeBlob is not in the process of being recycled. | |
270 CodeBlob* CodeCache::find_blob(void* start) { | |
271 CodeBlob* result = find_blob_unsafe(start); | |
272 if (result == NULL) return NULL; | |
273 // We could potientially look up non_entrant methods | |
274 guarantee(!result->is_zombie() || result->is_locked_by_vm() || is_error_reported(), "unsafe access to zombie method"); | |
275 return result; | |
276 } | |
277 | |
278 nmethod* CodeCache::find_nmethod(void* start) { | |
279 CodeBlob *cb = find_blob(start); | |
280 assert(cb == NULL || cb->is_nmethod(), "did not find an nmethod"); | |
281 return (nmethod*)cb; | |
282 } | |
283 | |
284 | |
285 void CodeCache::blobs_do(void f(CodeBlob* nm)) { | |
286 assert_locked_or_safepoint(CodeCache_lock); | |
287 FOR_ALL_BLOBS(p) { | |
288 f(p); | |
289 } | |
290 } | |
291 | |
292 | |
293 void CodeCache::nmethods_do(void f(nmethod* nm)) { | |
294 assert_locked_or_safepoint(CodeCache_lock); | |
295 FOR_ALL_BLOBS(nm) { | |
296 if (nm->is_nmethod()) f((nmethod*)nm); | |
297 } | |
298 } | |
299 | |
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300 void CodeCache::alive_nmethods_do(void f(nmethod* nm)) { |
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301 assert_locked_or_safepoint(CodeCache_lock); |
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302 FOR_ALL_ALIVE_NMETHODS(nm) { |
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303 f(nm); |
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304 } |
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305 } |
0 | 306 |
307 int CodeCache::alignment_unit() { | |
308 return (int)_heap->alignment_unit(); | |
309 } | |
310 | |
311 | |
312 int CodeCache::alignment_offset() { | |
313 return (int)_heap->alignment_offset(); | |
314 } | |
315 | |
316 | |
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317 // Mark nmethods for unloading if they contain otherwise unreachable |
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318 // oops. |
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319 void CodeCache::do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred) { |
0 | 320 assert_locked_or_safepoint(CodeCache_lock); |
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321 FOR_ALL_ALIVE_NMETHODS(nm) { |
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322 nm->do_unloading(is_alive, unloading_occurred); |
0 | 323 } |
324 } | |
325 | |
989 | 326 void CodeCache::blobs_do(CodeBlobClosure* f) { |
0 | 327 assert_locked_or_safepoint(CodeCache_lock); |
328 FOR_ALL_ALIVE_BLOBS(cb) { | |
989 | 329 f->do_code_blob(cb); |
330 | |
331 #ifdef ASSERT | |
332 if (cb->is_nmethod()) | |
333 ((nmethod*)cb)->verify_scavenge_root_oops(); | |
334 #endif //ASSERT | |
0 | 335 } |
336 } | |
337 | |
989 | 338 // Walk the list of methods which might contain non-perm oops. |
339 void CodeCache::scavenge_root_nmethods_do(CodeBlobClosure* f) { | |
340 assert_locked_or_safepoint(CodeCache_lock); | |
341 debug_only(mark_scavenge_root_nmethods()); | |
342 | |
343 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
344 debug_only(cur->clear_scavenge_root_marked()); | |
345 assert(cur->scavenge_root_not_marked(), ""); | |
346 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
347 | |
348 bool is_live = (!cur->is_zombie() && !cur->is_unloaded()); | |
349 #ifndef PRODUCT | |
350 if (TraceScavenge) { | |
351 cur->print_on(tty, is_live ? "scavenge root" : "dead scavenge root"); tty->cr(); | |
352 } | |
353 #endif //PRODUCT | |
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354 if (is_live) { |
989 | 355 // Perform cur->oops_do(f), maybe just once per nmethod. |
356 f->do_code_blob(cur); | |
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357 } |
989 | 358 } |
359 | |
360 // Check for stray marks. | |
361 debug_only(verify_perm_nmethods(NULL)); | |
362 } | |
363 | |
364 void CodeCache::add_scavenge_root_nmethod(nmethod* nm) { | |
365 assert_locked_or_safepoint(CodeCache_lock); | |
366 nm->set_on_scavenge_root_list(); | |
367 nm->set_scavenge_root_link(_scavenge_root_nmethods); | |
368 set_scavenge_root_nmethods(nm); | |
369 print_trace("add_scavenge_root", nm); | |
370 } | |
371 | |
372 void CodeCache::drop_scavenge_root_nmethod(nmethod* nm) { | |
373 assert_locked_or_safepoint(CodeCache_lock); | |
374 print_trace("drop_scavenge_root", nm); | |
375 nmethod* last = NULL; | |
376 nmethod* cur = scavenge_root_nmethods(); | |
377 while (cur != NULL) { | |
378 nmethod* next = cur->scavenge_root_link(); | |
379 if (cur == nm) { | |
380 if (last != NULL) | |
381 last->set_scavenge_root_link(next); | |
382 else set_scavenge_root_nmethods(next); | |
383 nm->set_scavenge_root_link(NULL); | |
384 nm->clear_on_scavenge_root_list(); | |
385 return; | |
386 } | |
387 last = cur; | |
388 cur = next; | |
389 } | |
390 assert(false, "should have been on list"); | |
391 } | |
392 | |
393 void CodeCache::prune_scavenge_root_nmethods() { | |
394 assert_locked_or_safepoint(CodeCache_lock); | |
395 debug_only(mark_scavenge_root_nmethods()); | |
396 | |
397 nmethod* last = NULL; | |
398 nmethod* cur = scavenge_root_nmethods(); | |
399 while (cur != NULL) { | |
400 nmethod* next = cur->scavenge_root_link(); | |
401 debug_only(cur->clear_scavenge_root_marked()); | |
402 assert(cur->scavenge_root_not_marked(), ""); | |
403 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
404 | |
405 if (!cur->is_zombie() && !cur->is_unloaded() | |
406 && cur->detect_scavenge_root_oops()) { | |
407 // Keep it. Advance 'last' to prevent deletion. | |
408 last = cur; | |
409 } else { | |
410 // Prune it from the list, so we don't have to look at it any more. | |
411 print_trace("prune_scavenge_root", cur); | |
412 cur->set_scavenge_root_link(NULL); | |
413 cur->clear_on_scavenge_root_list(); | |
414 if (last != NULL) | |
415 last->set_scavenge_root_link(next); | |
416 else set_scavenge_root_nmethods(next); | |
417 } | |
418 cur = next; | |
419 } | |
420 | |
421 // Check for stray marks. | |
422 debug_only(verify_perm_nmethods(NULL)); | |
423 } | |
424 | |
425 #ifndef PRODUCT | |
426 void CodeCache::asserted_non_scavengable_nmethods_do(CodeBlobClosure* f) { | |
427 // While we are here, verify the integrity of the list. | |
428 mark_scavenge_root_nmethods(); | |
429 for (nmethod* cur = scavenge_root_nmethods(); cur != NULL; cur = cur->scavenge_root_link()) { | |
430 assert(cur->on_scavenge_root_list(), "else shouldn't be on this list"); | |
431 cur->clear_scavenge_root_marked(); | |
432 } | |
433 verify_perm_nmethods(f); | |
434 } | |
435 | |
436 // Temporarily mark nmethods that are claimed to be on the non-perm list. | |
437 void CodeCache::mark_scavenge_root_nmethods() { | |
438 FOR_ALL_ALIVE_BLOBS(cb) { | |
439 if (cb->is_nmethod()) { | |
440 nmethod *nm = (nmethod*)cb; | |
441 assert(nm->scavenge_root_not_marked(), "clean state"); | |
442 if (nm->on_scavenge_root_list()) | |
443 nm->set_scavenge_root_marked(); | |
444 } | |
445 } | |
446 } | |
447 | |
448 // If the closure is given, run it on the unlisted nmethods. | |
449 // Also make sure that the effects of mark_scavenge_root_nmethods is gone. | |
450 void CodeCache::verify_perm_nmethods(CodeBlobClosure* f_or_null) { | |
451 FOR_ALL_ALIVE_BLOBS(cb) { | |
452 bool call_f = (f_or_null != NULL); | |
453 if (cb->is_nmethod()) { | |
454 nmethod *nm = (nmethod*)cb; | |
455 assert(nm->scavenge_root_not_marked(), "must be already processed"); | |
456 if (nm->on_scavenge_root_list()) | |
457 call_f = false; // don't show this one to the client | |
458 nm->verify_scavenge_root_oops(); | |
459 } else { | |
460 call_f = false; // not an nmethod | |
461 } | |
462 if (call_f) f_or_null->do_code_blob(cb); | |
463 } | |
464 } | |
465 #endif //PRODUCT | |
466 | |
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467 /** |
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468 * Remove and return nmethod from the saved code list in order to reanimate it. |
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469 */ |
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470 nmethod* CodeCache::reanimate_saved_code(Method* m) { |
1202 | 471 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
472 nmethod* saved = _saved_nmethods; | |
473 nmethod* prev = NULL; | |
474 while (saved != NULL) { | |
475 if (saved->is_in_use() && saved->method() == m) { | |
476 if (prev != NULL) { | |
477 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
478 } else { | |
479 _saved_nmethods = saved->saved_nmethod_link(); | |
480 } | |
481 assert(saved->is_speculatively_disconnected(), "shouldn't call for other nmethods"); | |
482 saved->set_speculatively_disconnected(false); | |
483 saved->set_saved_nmethod_link(NULL); | |
484 if (PrintMethodFlushing) { | |
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485 saved->print_on(tty, " ### nmethod is reconnected"); |
1202 | 486 } |
487 if (LogCompilation && (xtty != NULL)) { | |
488 ttyLocker ttyl; | |
489 xtty->begin_elem("nmethod_reconnected compile_id='%3d'", saved->compile_id()); | |
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490 xtty->method(m); |
1202 | 491 xtty->stamp(); |
492 xtty->end_elem(); | |
493 } | |
494 return saved; | |
495 } | |
496 prev = saved; | |
497 saved = saved->saved_nmethod_link(); | |
498 } | |
499 return NULL; | |
500 } | |
501 | |
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502 /** |
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503 * Remove nmethod from the saved code list in order to discard it permanently |
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504 */ |
1202 | 505 void CodeCache::remove_saved_code(nmethod* nm) { |
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506 // For conc swpr this will be called with CodeCache_lock taken by caller |
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507 assert_locked_or_safepoint(CodeCache_lock); |
1202 | 508 assert(nm->is_speculatively_disconnected(), "shouldn't call for other nmethods"); |
509 nmethod* saved = _saved_nmethods; | |
510 nmethod* prev = NULL; | |
511 while (saved != NULL) { | |
512 if (saved == nm) { | |
513 if (prev != NULL) { | |
514 prev->set_saved_nmethod_link(saved->saved_nmethod_link()); | |
515 } else { | |
516 _saved_nmethods = saved->saved_nmethod_link(); | |
517 } | |
518 if (LogCompilation && (xtty != NULL)) { | |
519 ttyLocker ttyl; | |
520 xtty->begin_elem("nmethod_removed compile_id='%3d'", nm->compile_id()); | |
521 xtty->stamp(); | |
522 xtty->end_elem(); | |
523 } | |
524 return; | |
525 } | |
526 prev = saved; | |
527 saved = saved->saved_nmethod_link(); | |
528 } | |
529 ShouldNotReachHere(); | |
530 } | |
531 | |
532 void CodeCache::speculatively_disconnect(nmethod* nm) { | |
533 assert_locked_or_safepoint(CodeCache_lock); | |
534 assert(nm->is_in_use() && !nm->is_speculatively_disconnected(), "should only disconnect live nmethods"); | |
535 nm->set_saved_nmethod_link(_saved_nmethods); | |
536 _saved_nmethods = nm; | |
537 if (PrintMethodFlushing) { | |
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538 nm->print_on(tty, " ### nmethod is speculatively disconnected"); |
1202 | 539 } |
540 if (LogCompilation && (xtty != NULL)) { | |
541 ttyLocker ttyl; | |
542 xtty->begin_elem("nmethod_disconnected compile_id='%3d'", nm->compile_id()); | |
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543 xtty->method(nm->method()); |
1202 | 544 xtty->stamp(); |
545 xtty->end_elem(); | |
546 } | |
547 nm->method()->clear_code(); | |
548 nm->set_speculatively_disconnected(true); | |
549 } | |
550 | |
551 | |
0 | 552 void CodeCache::gc_prologue() { |
989 | 553 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_epilogue must be called"); |
0 | 554 } |
555 | |
556 | |
557 void CodeCache::gc_epilogue() { | |
558 assert_locked_or_safepoint(CodeCache_lock); | |
559 FOR_ALL_ALIVE_BLOBS(cb) { | |
560 if (cb->is_nmethod()) { | |
561 nmethod *nm = (nmethod*)cb; | |
562 assert(!nm->is_unloaded(), "Tautology"); | |
563 if (needs_cache_clean()) { | |
564 nm->cleanup_inline_caches(); | |
565 } | |
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566 DEBUG_ONLY(nm->verify()); |
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567 nm->fix_oop_relocations(); |
0 | 568 } |
569 } | |
570 set_needs_cache_clean(false); | |
989 | 571 prune_scavenge_root_nmethods(); |
572 assert(!nmethod::oops_do_marking_is_active(), "oops_do_marking_prologue must be called"); | |
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573 |
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574 #ifdef ASSERT |
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575 // make sure that we aren't leaking icholders |
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576 int count = 0; |
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577 FOR_ALL_BLOBS(cb) { |
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578 if (cb->is_nmethod()) { |
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579 RelocIterator iter((nmethod*)cb); |
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580 while(iter.next()) { |
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581 if (iter.type() == relocInfo::virtual_call_type) { |
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582 if (CompiledIC::is_icholder_call_site(iter.virtual_call_reloc())) { |
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583 CompiledIC *ic = CompiledIC_at(iter.reloc()); |
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584 if (TraceCompiledIC) { |
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585 tty->print("noticed icholder " INTPTR_FORMAT " ", ic->cached_icholder()); |
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586 ic->print(); |
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587 } |
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588 assert(ic->cached_icholder() != NULL, "must be non-NULL"); |
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589 count++; |
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590 } |
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591 } |
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592 } |
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593 } |
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594 } |
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595 |
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596 assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == |
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597 CompiledICHolder::live_count(), "must agree"); |
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598 #endif |
0 | 599 } |
600 | |
601 | |
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602 void CodeCache::verify_oops() { |
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603 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
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604 VerifyOopClosure voc; |
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605 FOR_ALL_ALIVE_BLOBS(cb) { |
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606 if (cb->is_nmethod()) { |
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607 nmethod *nm = (nmethod*)cb; |
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608 nm->oops_do(&voc); |
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609 nm->verify_oop_relocations(); |
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610 } |
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611 } |
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612 } |
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613 |
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614 |
0 | 615 address CodeCache::first_address() { |
616 assert_locked_or_safepoint(CodeCache_lock); | |
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617 return (address)_heap->low_boundary(); |
0 | 618 } |
619 | |
620 | |
621 address CodeCache::last_address() { | |
622 assert_locked_or_safepoint(CodeCache_lock); | |
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623 return (address)_heap->high(); |
0 | 624 } |
625 | |
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626 /** |
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627 * Returns the reverse free ratio. E.g., if 25% (1/4) of the code cache |
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628 * is free, reverse_free_ratio() returns 4. |
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629 */ |
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630 double CodeCache::reverse_free_ratio() { |
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631 double unallocated_capacity = (double)(CodeCache::unallocated_capacity() - CodeCacheMinimumFreeSpace); |
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632 double max_capacity = (double)CodeCache::max_capacity(); |
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633 return max_capacity / unallocated_capacity; |
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634 } |
0 | 635 |
636 void icache_init(); | |
637 | |
638 void CodeCache::initialize() { | |
639 assert(CodeCacheSegmentSize >= (uintx)CodeEntryAlignment, "CodeCacheSegmentSize must be large enough to align entry points"); | |
640 #ifdef COMPILER2 | |
641 assert(CodeCacheSegmentSize >= (uintx)OptoLoopAlignment, "CodeCacheSegmentSize must be large enough to align inner loops"); | |
642 #endif | |
643 assert(CodeCacheSegmentSize >= sizeof(jdouble), "CodeCacheSegmentSize must be large enough to align constants"); | |
644 // This was originally just a check of the alignment, causing failure, instead, round | |
645 // the code cache to the page size. In particular, Solaris is moving to a larger | |
646 // default page size. | |
647 CodeCacheExpansionSize = round_to(CodeCacheExpansionSize, os::vm_page_size()); | |
648 InitialCodeCacheSize = round_to(InitialCodeCacheSize, os::vm_page_size()); | |
649 ReservedCodeCacheSize = round_to(ReservedCodeCacheSize, os::vm_page_size()); | |
650 if (!_heap->reserve(ReservedCodeCacheSize, InitialCodeCacheSize, CodeCacheSegmentSize)) { | |
651 vm_exit_during_initialization("Could not reserve enough space for code cache"); | |
652 } | |
653 | |
654 MemoryService::add_code_heap_memory_pool(_heap); | |
655 | |
656 // Initialize ICache flush mechanism | |
657 // This service is needed for os::register_code_area | |
658 icache_init(); | |
659 | |
660 // Give OS a chance to register generated code area. | |
661 // This is used on Windows 64 bit platforms to register | |
662 // Structured Exception Handlers for our generated code. | |
663 os::register_code_area(_heap->low_boundary(), _heap->high_boundary()); | |
664 } | |
665 | |
666 | |
667 void codeCache_init() { | |
668 CodeCache::initialize(); | |
669 } | |
670 | |
671 //------------------------------------------------------------------------------------------------ | |
672 | |
673 int CodeCache::number_of_nmethods_with_dependencies() { | |
674 return _number_of_nmethods_with_dependencies; | |
675 } | |
676 | |
677 void CodeCache::clear_inline_caches() { | |
678 assert_locked_or_safepoint(CodeCache_lock); | |
679 FOR_ALL_ALIVE_NMETHODS(nm) { | |
680 nm->clear_inline_caches(); | |
681 } | |
682 } | |
683 | |
684 #ifndef PRODUCT | |
685 // used to keep track of how much time is spent in mark_for_deoptimization | |
686 static elapsedTimer dependentCheckTime; | |
687 static int dependentCheckCount = 0; | |
688 #endif // PRODUCT | |
689 | |
690 | |
691 int CodeCache::mark_for_deoptimization(DepChange& changes) { | |
692 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
693 | |
694 #ifndef PRODUCT | |
695 dependentCheckTime.start(); | |
696 dependentCheckCount++; | |
697 #endif // PRODUCT | |
698 | |
699 int number_of_marked_CodeBlobs = 0; | |
700 | |
701 // search the hierarchy looking for nmethods which are affected by the loading of this class | |
702 | |
703 // then search the interfaces this class implements looking for nmethods | |
704 // which might be dependent of the fact that an interface only had one | |
705 // implementor. | |
706 | |
707 { No_Safepoint_Verifier nsv; | |
708 for (DepChange::ContextStream str(changes, nsv); str.next(); ) { | |
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709 Klass* d = str.klass(); |
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710 number_of_marked_CodeBlobs += InstanceKlass::cast(d)->mark_dependent_nmethods(changes); |
0 | 711 } |
712 } | |
713 | |
714 if (VerifyDependencies) { | |
715 // Turn off dependency tracing while actually testing deps. | |
716 NOT_PRODUCT( FlagSetting fs(TraceDependencies, false) ); | |
717 FOR_ALL_ALIVE_NMETHODS(nm) { | |
718 if (!nm->is_marked_for_deoptimization() && | |
719 nm->check_all_dependencies()) { | |
720 ResourceMark rm; | |
721 tty->print_cr("Should have been marked for deoptimization:"); | |
722 changes.print(); | |
723 nm->print(); | |
724 nm->print_dependencies(); | |
725 } | |
726 } | |
727 } | |
728 | |
729 #ifndef PRODUCT | |
730 dependentCheckTime.stop(); | |
731 #endif // PRODUCT | |
732 | |
733 return number_of_marked_CodeBlobs; | |
734 } | |
735 | |
736 | |
737 #ifdef HOTSWAP | |
738 int CodeCache::mark_for_evol_deoptimization(instanceKlassHandle dependee) { | |
739 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
740 int number_of_marked_CodeBlobs = 0; | |
741 | |
742 // Deoptimize all methods of the evolving class itself | |
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743 Array<Method*>* old_methods = dependee->methods(); |
0 | 744 for (int i = 0; i < old_methods->length(); i++) { |
745 ResourceMark rm; | |
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746 Method* old_method = old_methods->at(i); |
0 | 747 nmethod *nm = old_method->code(); |
748 if (nm != NULL) { | |
749 nm->mark_for_deoptimization(); | |
750 number_of_marked_CodeBlobs++; | |
751 } | |
752 } | |
753 | |
754 FOR_ALL_ALIVE_NMETHODS(nm) { | |
755 if (nm->is_marked_for_deoptimization()) { | |
756 // ...Already marked in the previous pass; don't count it again. | |
757 } else if (nm->is_evol_dependent_on(dependee())) { | |
758 ResourceMark rm; | |
759 nm->mark_for_deoptimization(); | |
760 number_of_marked_CodeBlobs++; | |
761 } else { | |
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762 // flush caches in case they refer to a redefined Method* |
0 | 763 nm->clear_inline_caches(); |
764 } | |
765 } | |
766 | |
767 return number_of_marked_CodeBlobs; | |
768 } | |
769 #endif // HOTSWAP | |
770 | |
771 | |
772 // Deoptimize all methods | |
773 void CodeCache::mark_all_nmethods_for_deoptimization() { | |
774 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
775 FOR_ALL_ALIVE_NMETHODS(nm) { | |
776 nm->mark_for_deoptimization(); | |
777 } | |
778 } | |
779 | |
780 | |
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781 int CodeCache::mark_for_deoptimization(Method* dependee) { |
0 | 782 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
783 int number_of_marked_CodeBlobs = 0; | |
784 | |
785 FOR_ALL_ALIVE_NMETHODS(nm) { | |
786 if (nm->is_dependent_on_method(dependee)) { | |
787 ResourceMark rm; | |
788 nm->mark_for_deoptimization(); | |
789 number_of_marked_CodeBlobs++; | |
790 } | |
791 } | |
792 | |
793 return number_of_marked_CodeBlobs; | |
794 } | |
795 | |
796 void CodeCache::make_marked_nmethods_zombies() { | |
797 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
798 FOR_ALL_ALIVE_NMETHODS(nm) { | |
799 if (nm->is_marked_for_deoptimization()) { | |
800 | |
801 // If the nmethod has already been made non-entrant and it can be converted | |
802 // then zombie it now. Otherwise make it non-entrant and it will eventually | |
803 // be zombied when it is no longer seen on the stack. Note that the nmethod | |
804 // might be "entrant" and not on the stack and so could be zombied immediately | |
805 // but we can't tell because we don't track it on stack until it becomes | |
806 // non-entrant. | |
807 | |
808 if (nm->is_not_entrant() && nm->can_not_entrant_be_converted()) { | |
809 nm->make_zombie(); | |
810 } else { | |
811 nm->make_not_entrant(); | |
812 } | |
813 } | |
814 } | |
815 } | |
816 | |
817 void CodeCache::make_marked_nmethods_not_entrant() { | |
818 assert_locked_or_safepoint(CodeCache_lock); | |
819 FOR_ALL_ALIVE_NMETHODS(nm) { | |
820 if (nm->is_marked_for_deoptimization()) { | |
821 nm->make_not_entrant(); | |
822 } | |
823 } | |
824 } | |
825 | |
826 void CodeCache::verify() { | |
827 _heap->verify(); | |
828 FOR_ALL_ALIVE_BLOBS(p) { | |
829 p->verify(); | |
830 } | |
831 } | |
832 | |
10405 | 833 void CodeCache::report_codemem_full() { |
834 _codemem_full_count++; | |
835 EventCodeCacheFull event; | |
836 if (event.should_commit()) { | |
837 event.set_startAddress((u8)low_bound()); | |
838 event.set_commitedTopAddress((u8)high()); | |
839 event.set_reservedTopAddress((u8)high_bound()); | |
840 event.set_entryCount(nof_blobs()); | |
841 event.set_methodCount(nof_nmethods()); | |
842 event.set_adaptorCount(nof_adapters()); | |
843 event.set_unallocatedCapacity(unallocated_capacity()/K); | |
844 event.set_fullCount(_codemem_full_count); | |
845 event.commit(); | |
846 } | |
847 } | |
848 | |
0 | 849 //------------------------------------------------------------------------------------------------ |
850 // Non-product version | |
851 | |
852 #ifndef PRODUCT | |
853 | |
854 void CodeCache::verify_if_often() { | |
855 if (VerifyCodeCacheOften) { | |
856 _heap->verify(); | |
857 } | |
858 } | |
859 | |
989 | 860 void CodeCache::print_trace(const char* event, CodeBlob* cb, int size) { |
861 if (PrintCodeCache2) { // Need to add a new flag | |
862 ResourceMark rm; | |
863 if (size == 0) size = cb->size(); | |
864 tty->print_cr("CodeCache %s: addr: " INTPTR_FORMAT ", size: 0x%x", event, cb, size); | |
865 } | |
866 } | |
867 | |
0 | 868 void CodeCache::print_internals() { |
869 int nmethodCount = 0; | |
870 int runtimeStubCount = 0; | |
871 int adapterCount = 0; | |
872 int deoptimizationStubCount = 0; | |
873 int uncommonTrapStubCount = 0; | |
874 int bufferBlobCount = 0; | |
875 int total = 0; | |
876 int nmethodAlive = 0; | |
877 int nmethodNotEntrant = 0; | |
878 int nmethodZombie = 0; | |
879 int nmethodUnloaded = 0; | |
880 int nmethodJava = 0; | |
881 int nmethodNative = 0; | |
882 int maxCodeSize = 0; | |
883 ResourceMark rm; | |
884 | |
885 CodeBlob *cb; | |
886 for (cb = first(); cb != NULL; cb = next(cb)) { | |
887 total++; | |
888 if (cb->is_nmethod()) { | |
889 nmethod* nm = (nmethod*)cb; | |
890 | |
891 if (Verbose && nm->method() != NULL) { | |
892 ResourceMark rm; | |
893 char *method_name = nm->method()->name_and_sig_as_C_string(); | |
894 tty->print("%s", method_name); | |
895 if(nm->is_alive()) { tty->print_cr(" alive"); } | |
896 if(nm->is_not_entrant()) { tty->print_cr(" not-entrant"); } | |
897 if(nm->is_zombie()) { tty->print_cr(" zombie"); } | |
898 } | |
899 | |
900 nmethodCount++; | |
901 | |
902 if(nm->is_alive()) { nmethodAlive++; } | |
903 if(nm->is_not_entrant()) { nmethodNotEntrant++; } | |
904 if(nm->is_zombie()) { nmethodZombie++; } | |
905 if(nm->is_unloaded()) { nmethodUnloaded++; } | |
906 if(nm->is_native_method()) { nmethodNative++; } | |
907 | |
908 if(nm->method() != NULL && nm->is_java_method()) { | |
909 nmethodJava++; | |
1748 | 910 if (nm->insts_size() > maxCodeSize) { |
911 maxCodeSize = nm->insts_size(); | |
0 | 912 } |
913 } | |
914 } else if (cb->is_runtime_stub()) { | |
915 runtimeStubCount++; | |
916 } else if (cb->is_deoptimization_stub()) { | |
917 deoptimizationStubCount++; | |
918 } else if (cb->is_uncommon_trap_stub()) { | |
919 uncommonTrapStubCount++; | |
920 } else if (cb->is_adapter_blob()) { | |
921 adapterCount++; | |
922 } else if (cb->is_buffer_blob()) { | |
923 bufferBlobCount++; | |
924 } | |
925 } | |
926 | |
927 int bucketSize = 512; | |
928 int bucketLimit = maxCodeSize / bucketSize + 1; | |
6197 | 929 int *buckets = NEW_C_HEAP_ARRAY(int, bucketLimit, mtCode); |
0 | 930 memset(buckets,0,sizeof(int) * bucketLimit); |
931 | |
932 for (cb = first(); cb != NULL; cb = next(cb)) { | |
933 if (cb->is_nmethod()) { | |
934 nmethod* nm = (nmethod*)cb; | |
935 if(nm->is_java_method()) { | |
1748 | 936 buckets[nm->insts_size() / bucketSize]++; |
0 | 937 } |
938 } | |
939 } | |
940 tty->print_cr("Code Cache Entries (total of %d)",total); | |
941 tty->print_cr("-------------------------------------------------"); | |
942 tty->print_cr("nmethods: %d",nmethodCount); | |
943 tty->print_cr("\talive: %d",nmethodAlive); | |
944 tty->print_cr("\tnot_entrant: %d",nmethodNotEntrant); | |
945 tty->print_cr("\tzombie: %d",nmethodZombie); | |
946 tty->print_cr("\tunloaded: %d",nmethodUnloaded); | |
947 tty->print_cr("\tjava: %d",nmethodJava); | |
948 tty->print_cr("\tnative: %d",nmethodNative); | |
949 tty->print_cr("runtime_stubs: %d",runtimeStubCount); | |
950 tty->print_cr("adapters: %d",adapterCount); | |
951 tty->print_cr("buffer blobs: %d",bufferBlobCount); | |
952 tty->print_cr("deoptimization_stubs: %d",deoptimizationStubCount); | |
953 tty->print_cr("uncommon_traps: %d",uncommonTrapStubCount); | |
954 tty->print_cr("\nnmethod size distribution (non-zombie java)"); | |
955 tty->print_cr("-------------------------------------------------"); | |
956 | |
957 for(int i=0; i<bucketLimit; i++) { | |
958 if(buckets[i] != 0) { | |
959 tty->print("%d - %d bytes",i*bucketSize,(i+1)*bucketSize); | |
960 tty->fill_to(40); | |
961 tty->print_cr("%d",buckets[i]); | |
962 } | |
963 } | |
964 | |
6197 | 965 FREE_C_HEAP_ARRAY(int, buckets, mtCode); |
0 | 966 } |
967 | |
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968 #endif // !PRODUCT |
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969 |
0 | 970 void CodeCache::print() { |
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971 print_summary(tty); |
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972 |
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973 #ifndef PRODUCT |
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974 if (!Verbose) return; |
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975 |
0 | 976 CodeBlob_sizes live; |
977 CodeBlob_sizes dead; | |
978 | |
979 FOR_ALL_BLOBS(p) { | |
980 if (!p->is_alive()) { | |
981 dead.add(p); | |
982 } else { | |
983 live.add(p); | |
984 } | |
985 } | |
986 | |
987 tty->print_cr("CodeCache:"); | |
988 | |
989 tty->print_cr("nmethod dependency checking time %f", dependentCheckTime.seconds(), | |
990 dependentCheckTime.seconds() / dependentCheckCount); | |
991 | |
992 if (!live.is_empty()) { | |
993 live.print("live"); | |
994 } | |
995 if (!dead.is_empty()) { | |
996 dead.print("dead"); | |
997 } | |
998 | |
999 | |
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1000 if (WizardMode) { |
0 | 1001 // print the oop_map usage |
1002 int code_size = 0; | |
1003 int number_of_blobs = 0; | |
1004 int number_of_oop_maps = 0; | |
1005 int map_size = 0; | |
1006 FOR_ALL_BLOBS(p) { | |
1007 if (p->is_alive()) { | |
1008 number_of_blobs++; | |
1748 | 1009 code_size += p->code_size(); |
0 | 1010 OopMapSet* set = p->oop_maps(); |
1011 if (set != NULL) { | |
1012 number_of_oop_maps += set->size(); | |
1748 | 1013 map_size += set->heap_size(); |
0 | 1014 } |
1015 } | |
1016 } | |
1017 tty->print_cr("OopMaps"); | |
1018 tty->print_cr(" #blobs = %d", number_of_blobs); | |
1019 tty->print_cr(" code size = %d", code_size); | |
1020 tty->print_cr(" #oop_maps = %d", number_of_oop_maps); | |
1021 tty->print_cr(" map size = %d", map_size); | |
1022 } | |
1023 | |
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1024 #endif // !PRODUCT |
0 | 1025 } |
1026 | |
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1027 void CodeCache::print_summary(outputStream* st, bool detailed) { |
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1028 size_t total = (_heap->high_boundary() - _heap->low_boundary()); |
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1029 st->print_cr("CodeCache: size=" SIZE_FORMAT "Kb used=" SIZE_FORMAT |
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1030 "Kb max_used=" SIZE_FORMAT "Kb free=" SIZE_FORMAT "Kb", |
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1031 total/K, (total - unallocated_capacity())/K, |
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1032 maxCodeCacheUsed/K, unallocated_capacity()/K); |
1907 | 1033 |
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1034 if (detailed) { |
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1035 st->print_cr(" bounds [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
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1036 _heap->low_boundary(), |
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1037 _heap->high(), |
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1038 _heap->high_boundary()); |
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1039 st->print_cr(" total_blobs=" UINT32_FORMAT " nmethods=" UINT32_FORMAT |
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1040 " adapters=" UINT32_FORMAT, |
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1041 nof_blobs(), nof_nmethods(), nof_adapters()); |
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1042 st->print_cr(" compilation: %s", CompileBroker::should_compile_new_jobs() ? |
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1043 "enabled" : Arguments::mode() == Arguments::_int ? |
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1044 "disabled (interpreter mode)" : |
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1045 "disabled (not enough contiguous free space left)"); |
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1046 } |
1907 | 1047 } |
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1048 |
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1049 void CodeCache::log_state(outputStream* st) { |
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1050 st->print(" total_blobs='" UINT32_FORMAT "' nmethods='" UINT32_FORMAT "'" |
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1051 " adapters='" UINT32_FORMAT "' free_code_cache='" SIZE_FORMAT "'", |
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1052 nof_blobs(), nof_nmethods(), nof_adapters(), |
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1053 unallocated_capacity()); |
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1054 } |
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1055 |