Mercurial > hg > truffle
annotate src/share/vm/compiler/compileBroker.cpp @ 3852:fdb992d83a87
7071653: JSR 292: call site change notification should be pushed not pulled
Reviewed-by: kvn, never, bdelsart
author | twisti |
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date | Tue, 16 Aug 2011 04:14:05 -0700 |
parents | f918d6096e23 |
children | be4ca325525a 436b4a3231bf |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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 "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "code/codeCache.hpp" | |
29 #include "compiler/compileBroker.hpp" | |
30 #include "compiler/compileLog.hpp" | |
31 #include "compiler/compilerOracle.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "memory/allocation.inline.hpp" | |
34 #include "oops/methodDataOop.hpp" | |
35 #include "oops/methodOop.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "prims/nativeLookup.hpp" | |
38 #include "runtime/arguments.hpp" | |
39 #include "runtime/compilationPolicy.hpp" | |
40 #include "runtime/init.hpp" | |
41 #include "runtime/interfaceSupport.hpp" | |
42 #include "runtime/javaCalls.hpp" | |
43 #include "runtime/os.hpp" | |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/sweeper.hpp" | |
46 #include "utilities/dtrace.hpp" | |
47 #ifdef COMPILER1 | |
48 #include "c1/c1_Compiler.hpp" | |
49 #endif | |
50 #ifdef COMPILER2 | |
51 #include "opto/c2compiler.hpp" | |
52 #endif | |
53 #ifdef SHARK | |
54 #include "shark/sharkCompiler.hpp" | |
55 #endif | |
0 | 56 |
57 #ifdef DTRACE_ENABLED | |
58 | |
59 // Only bother with this argument setup if dtrace is available | |
60 | |
61 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, | |
62 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); | |
63 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, | |
64 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); | |
65 | |
66 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ | |
67 { \ | |
68 char* comp_name = (char*)(compiler)->name(); \ | |
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69 Symbol* klass_name = (method)->klass_name(); \ |
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70 Symbol* name = (method)->name(); \ |
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71 Symbol* signature = (method)->signature(); \ |
0 | 72 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ |
73 comp_name, strlen(comp_name), \ | |
74 klass_name->bytes(), klass_name->utf8_length(), \ | |
75 name->bytes(), name->utf8_length(), \ | |
76 signature->bytes(), signature->utf8_length()); \ | |
77 } | |
78 | |
79 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ | |
80 { \ | |
81 char* comp_name = (char*)(compiler)->name(); \ | |
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82 Symbol* klass_name = (method)->klass_name(); \ |
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83 Symbol* name = (method)->name(); \ |
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84 Symbol* signature = (method)->signature(); \ |
0 | 85 HS_DTRACE_PROBE9(hotspot, method__compile__end, \ |
86 comp_name, strlen(comp_name), \ | |
87 klass_name->bytes(), klass_name->utf8_length(), \ | |
88 name->bytes(), name->utf8_length(), \ | |
89 signature->bytes(), signature->utf8_length(), (success)); \ | |
90 } | |
91 | |
92 #else // ndef DTRACE_ENABLED | |
93 | |
94 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) | |
95 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) | |
96 | |
97 #endif // ndef DTRACE_ENABLED | |
98 | |
99 bool CompileBroker::_initialized = false; | |
100 volatile bool CompileBroker::_should_block = false; | |
1202 | 101 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; |
0 | 102 |
103 // The installed compiler(s) | |
104 AbstractCompiler* CompileBroker::_compilers[2]; | |
105 | |
106 // These counters are used for assigning id's to each compilation | |
107 uint CompileBroker::_compilation_id = 0; | |
108 uint CompileBroker::_osr_compilation_id = 0; | |
109 | |
110 // Debugging information | |
111 int CompileBroker::_last_compile_type = no_compile; | |
112 int CompileBroker::_last_compile_level = CompLevel_none; | |
113 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; | |
114 | |
115 // Performance counters | |
116 PerfCounter* CompileBroker::_perf_total_compilation = NULL; | |
117 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; | |
118 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; | |
119 | |
120 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; | |
121 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; | |
122 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; | |
123 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; | |
124 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; | |
125 | |
126 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; | |
127 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; | |
128 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; | |
129 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; | |
130 | |
131 PerfStringVariable* CompileBroker::_perf_last_method = NULL; | |
132 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; | |
133 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; | |
134 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; | |
135 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; | |
136 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; | |
137 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; | |
138 | |
139 // Timers and counters for generating statistics | |
140 elapsedTimer CompileBroker::_t_total_compilation; | |
141 elapsedTimer CompileBroker::_t_osr_compilation; | |
142 elapsedTimer CompileBroker::_t_standard_compilation; | |
143 | |
144 int CompileBroker::_total_bailout_count = 0; | |
145 int CompileBroker::_total_invalidated_count = 0; | |
146 int CompileBroker::_total_compile_count = 0; | |
147 int CompileBroker::_total_osr_compile_count = 0; | |
148 int CompileBroker::_total_standard_compile_count = 0; | |
149 | |
150 int CompileBroker::_sum_osr_bytes_compiled = 0; | |
151 int CompileBroker::_sum_standard_bytes_compiled = 0; | |
152 int CompileBroker::_sum_nmethod_size = 0; | |
153 int CompileBroker::_sum_nmethod_code_size = 0; | |
154 | |
1783 | 155 CompileQueue* CompileBroker::_c2_method_queue = NULL; |
156 CompileQueue* CompileBroker::_c1_method_queue = NULL; | |
0 | 157 CompileTask* CompileBroker::_task_free_list = NULL; |
158 | |
159 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; | |
160 | |
161 | |
162 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { | |
163 CompilerThread* thread = CompilerThread::current(); | |
164 thread->set_task(task); | |
165 CompileLog* log = thread->log(); | |
166 if (log != NULL) task->log_task_start(log); | |
167 } | |
168 | |
169 CompileTaskWrapper::~CompileTaskWrapper() { | |
170 CompilerThread* thread = CompilerThread::current(); | |
171 CompileTask* task = thread->task(); | |
172 CompileLog* log = thread->log(); | |
173 if (log != NULL) task->log_task_done(log); | |
174 thread->set_task(NULL); | |
175 task->set_code_handle(NULL); | |
176 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); | |
177 if (task->is_blocking()) { | |
178 MutexLocker notifier(task->lock(), thread); | |
179 task->mark_complete(); | |
180 // Notify the waiting thread that the compilation has completed. | |
181 task->lock()->notify_all(); | |
182 } else { | |
183 task->mark_complete(); | |
184 | |
185 // By convention, the compiling thread is responsible for | |
186 // recycling a non-blocking CompileTask. | |
187 CompileBroker::free_task(task); | |
188 } | |
189 } | |
190 | |
191 | |
192 // ------------------------------------------------------------------ | |
193 // CompileTask::initialize | |
194 void CompileTask::initialize(int compile_id, | |
195 methodHandle method, | |
196 int osr_bci, | |
197 int comp_level, | |
198 methodHandle hot_method, | |
199 int hot_count, | |
200 const char* comment, | |
201 bool is_blocking) { | |
202 assert(!_lock->is_locked(), "bad locking"); | |
203 | |
204 _compile_id = compile_id; | |
205 _method = JNIHandles::make_global(method); | |
206 _osr_bci = osr_bci; | |
207 _is_blocking = is_blocking; | |
208 _comp_level = comp_level; | |
209 _num_inlined_bytecodes = 0; | |
210 | |
211 _is_complete = false; | |
212 _is_success = false; | |
213 _code_handle = NULL; | |
214 | |
215 _hot_method = NULL; | |
216 _hot_count = hot_count; | |
217 _time_queued = 0; // tidy | |
218 _comment = comment; | |
219 | |
220 if (LogCompilation) { | |
221 _time_queued = os::elapsed_counter(); | |
222 if (hot_method.not_null()) { | |
223 if (hot_method == method) { | |
224 _hot_method = _method; | |
225 } else { | |
226 _hot_method = JNIHandles::make_global(hot_method); | |
227 } | |
228 } | |
229 } | |
230 | |
231 _next = NULL; | |
232 } | |
233 | |
234 // ------------------------------------------------------------------ | |
235 // CompileTask::code/set_code | |
236 nmethod* CompileTask::code() const { | |
237 if (_code_handle == NULL) return NULL; | |
238 return _code_handle->code(); | |
239 } | |
240 void CompileTask::set_code(nmethod* nm) { | |
241 if (_code_handle == NULL && nm == NULL) return; | |
242 guarantee(_code_handle != NULL, ""); | |
243 _code_handle->set_code(nm); | |
244 if (nm == NULL) _code_handle = NULL; // drop the handle also | |
245 } | |
246 | |
247 // ------------------------------------------------------------------ | |
248 // CompileTask::free | |
249 void CompileTask::free() { | |
250 set_code(NULL); | |
251 assert(!_lock->is_locked(), "Should not be locked when freed"); | |
252 if (_hot_method != NULL && _hot_method != _method) { | |
253 JNIHandles::destroy_global(_hot_method); | |
254 } | |
255 JNIHandles::destroy_global(_method); | |
256 } | |
257 | |
258 | |
259 // ------------------------------------------------------------------ | |
260 // CompileTask::print | |
261 void CompileTask::print() { | |
262 tty->print("<CompileTask compile_id=%d ", _compile_id); | |
263 tty->print("method="); | |
264 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); | |
265 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", | |
266 _osr_bci, bool_to_str(_is_blocking), | |
267 bool_to_str(_is_complete), bool_to_str(_is_success)); | |
268 } | |
269 | |
1783 | 270 |
0 | 271 // ------------------------------------------------------------------ |
272 // CompileTask::print_line_on_error | |
273 // | |
274 // This function is called by fatal error handler when the thread | |
275 // causing troubles is a compiler thread. | |
276 // | |
277 // Do not grab any lock, do not allocate memory. | |
278 // | |
279 // Otherwise it's the same as CompileTask::print_line() | |
280 // | |
281 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
282 // print compiler name | |
283 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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284 print_compilation(st); |
0 | 285 } |
286 | |
287 // ------------------------------------------------------------------ | |
288 // CompileTask::print_line | |
289 void CompileTask::print_line() { | |
290 ttyLocker ttyl; // keep the following output all in one block | |
291 // print compiler name if requested | |
292 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
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293 print_compilation(); |
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294 } |
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295 |
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296 |
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297 // ------------------------------------------------------------------ |
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298 // CompileTask::print_compilation_impl |
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299 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level, bool is_osr_method, int osr_bci, bool is_blocking, const char* msg) { |
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300 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp |
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301 st->print("%4d ", compile_id); // print compilation number |
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302 |
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303 // For unloaded methods the transition to zombie occurs after the |
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304 // method is cleared so it's impossible to report accurate |
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305 // information for that case. |
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306 bool is_synchronized = false; |
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307 bool has_exception_handler = false; |
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308 bool is_native = false; |
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309 if (method != NULL) { |
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310 is_synchronized = method->is_synchronized(); |
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311 has_exception_handler = method->has_exception_handler(); |
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312 is_native = method->is_native(); |
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313 } |
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314 // method attributes |
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315 const char compile_type = is_osr_method ? '%' : ' '; |
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316 const char sync_char = is_synchronized ? 's' : ' '; |
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317 const char exception_char = has_exception_handler ? '!' : ' '; |
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318 const char blocking_char = is_blocking ? 'b' : ' '; |
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319 const char native_char = is_native ? 'n' : ' '; |
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320 |
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321 // print method attributes |
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322 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); |
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323 |
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324 if (TieredCompilation) { |
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325 if (comp_level != -1) st->print("%d ", comp_level); |
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326 else st->print("- "); |
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327 } |
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328 st->print(" "); // more indent |
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329 |
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330 if (method == NULL) { |
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331 st->print("(method)"); |
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332 } else { |
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333 method->print_short_name(st); |
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334 if (is_osr_method) { |
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335 st->print(" @ %d", osr_bci); |
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336 } |
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337 st->print(" (%d bytes)", method->code_size()); |
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338 } |
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339 |
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340 if (msg != NULL) { |
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341 st->print(" %s", msg); |
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342 } |
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343 st->cr(); |
0 | 344 } |
345 | |
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346 // ------------------------------------------------------------------ |
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347 // CompileTask::print_inlining |
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348 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { |
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349 // 1234567 |
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350 st->print(" "); // print timestamp |
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351 // 1234 |
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352 st->print(" "); // print compilation number |
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353 |
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354 // method attributes |
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355 const char sync_char = method->is_synchronized() ? 's' : ' '; |
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356 const char exception_char = method->has_exception_handlers() ? '!' : ' '; |
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357 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; |
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358 |
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359 // print method attributes |
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360 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); |
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361 |
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362 if (TieredCompilation) { |
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363 st->print(" "); |
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364 } |
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365 st->print(" "); // more indent |
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366 st->print(" "); // initial inlining indent |
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367 |
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368 for (int i = 0; i < inline_level; i++) st->print(" "); |
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369 |
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370 st->print("@ %d ", bci); // print bci |
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371 method->print_short_name(st); |
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372 st->print(" (%d bytes)", method->code_size()); |
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373 |
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374 if (msg != NULL) { |
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375 st->print(" %s", msg); |
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376 } |
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377 st->cr(); |
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378 } |
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379 |
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380 // ------------------------------------------------------------------ |
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381 // CompileTask::print_inline_indent |
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382 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { |
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383 // 1234567 |
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384 st->print(" "); // print timestamp |
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385 // 1234 |
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386 st->print(" "); // print compilation number |
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387 // %s!bn |
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388 st->print(" "); // print method attributes |
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389 if (TieredCompilation) { |
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390 st->print(" "); |
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391 } |
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392 st->print(" "); // more indent |
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393 st->print(" "); // initial inlining indent |
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394 for (int i = 0; i < inline_level; i++) st->print(" "); |
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395 } |
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396 |
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397 // ------------------------------------------------------------------ |
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398 // CompileTask::print_compilation |
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399 void CompileTask::print_compilation(outputStream* st) { |
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400 oop rem = JNIHandles::resolve(method_handle()); |
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401 assert(rem != NULL && rem->is_method(), "must be"); |
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402 methodOop method = (methodOop) rem; |
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403 bool is_osr_method = osr_bci() != InvocationEntryBci; |
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404 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking()); |
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405 } |
0 | 406 |
407 // ------------------------------------------------------------------ | |
408 // CompileTask::log_task | |
409 void CompileTask::log_task(xmlStream* log) { | |
410 Thread* thread = Thread::current(); | |
411 methodHandle method(thread, | |
412 (methodOop)JNIHandles::resolve(method_handle())); | |
413 ResourceMark rm(thread); | |
414 | |
415 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
416 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
417 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
418 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
419 } // else compile_kind='c2c' | |
420 if (!method.is_null()) log->method(method); | |
421 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
422 log->print(" osr_bci='%d'", _osr_bci); | |
423 } | |
424 if (_comp_level != CompLevel_highest_tier) { | |
425 log->print(" level='%d'", _comp_level); | |
426 } | |
427 if (_is_blocking) { | |
428 log->print(" blocking='1'"); | |
429 } | |
430 log->stamp(); | |
431 } | |
432 | |
433 | |
434 // ------------------------------------------------------------------ | |
435 // CompileTask::log_task_queued | |
436 void CompileTask::log_task_queued() { | |
437 Thread* thread = Thread::current(); | |
438 ttyLocker ttyl; | |
439 ResourceMark rm(thread); | |
440 | |
441 xtty->begin_elem("task_queued"); | |
442 log_task(xtty); | |
443 if (_comment != NULL) { | |
444 xtty->print(" comment='%s'", _comment); | |
445 } | |
446 if (_hot_method != NULL) { | |
447 methodHandle hot(thread, | |
448 (methodOop)JNIHandles::resolve(_hot_method)); | |
449 methodHandle method(thread, | |
450 (methodOop)JNIHandles::resolve(_method)); | |
451 if (hot() != method()) { | |
452 xtty->method(hot); | |
453 } | |
454 } | |
455 if (_hot_count != 0) { | |
456 xtty->print(" hot_count='%d'", _hot_count); | |
457 } | |
458 xtty->end_elem(); | |
459 } | |
460 | |
461 | |
462 // ------------------------------------------------------------------ | |
463 // CompileTask::log_task_start | |
464 void CompileTask::log_task_start(CompileLog* log) { | |
465 log->begin_head("task"); | |
466 log_task(log); | |
467 log->end_head(); | |
468 } | |
469 | |
470 | |
471 // ------------------------------------------------------------------ | |
472 // CompileTask::log_task_done | |
473 void CompileTask::log_task_done(CompileLog* log) { | |
474 Thread* thread = Thread::current(); | |
475 methodHandle method(thread, | |
476 (methodOop)JNIHandles::resolve(method_handle())); | |
477 ResourceMark rm(thread); | |
478 | |
479 // <task_done ... stamp='1.234'> </task> | |
480 nmethod* nm = code(); | |
481 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
1748 | 482 _is_success, nm == NULL ? 0 : nm->content_size(), |
0 | 483 method->invocation_count()); |
484 int bec = method->backedge_count(); | |
485 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
486 // Note: "_is_complete" is about to be set, but is not. | |
487 if (_num_inlined_bytecodes != 0) { | |
488 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
489 } | |
490 log->stamp(); | |
491 log->end_elem(); | |
492 log->tail("task"); | |
493 log->clear_identities(); // next task will have different CI | |
494 if (log->unflushed_count() > 2000) { | |
495 log->flush(); | |
496 } | |
497 log->mark_file_end(); | |
498 } | |
499 | |
500 | |
501 | |
502 // ------------------------------------------------------------------ | |
503 // CompileQueue::add | |
504 // | |
505 // Add a CompileTask to a CompileQueue | |
506 void CompileQueue::add(CompileTask* task) { | |
507 assert(lock()->owned_by_self(), "must own lock"); | |
508 | |
509 task->set_next(NULL); | |
1783 | 510 task->set_prev(NULL); |
0 | 511 |
512 if (_last == NULL) { | |
513 // The compile queue is empty. | |
514 assert(_first == NULL, "queue is empty"); | |
515 _first = task; | |
516 _last = task; | |
517 } else { | |
518 // Append the task to the queue. | |
519 assert(_last->next() == NULL, "not last"); | |
520 _last->set_next(task); | |
1783 | 521 task->set_prev(_last); |
0 | 522 _last = task; |
523 } | |
1783 | 524 ++_size; |
0 | 525 |
526 // Mark the method as being in the compile queue. | |
527 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); | |
528 | |
529 if (CIPrintCompileQueue) { | |
530 print(); | |
531 } | |
532 | |
533 if (LogCompilation && xtty != NULL) { | |
534 task->log_task_queued(); | |
535 } | |
536 | |
537 // Notify CompilerThreads that a task is available. | |
1783 | 538 lock()->notify_all(); |
0 | 539 } |
540 | |
541 // ------------------------------------------------------------------ | |
542 // CompileQueue::get | |
543 // | |
544 // Get the next CompileTask from a CompileQueue | |
545 CompileTask* CompileQueue::get() { | |
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546 NMethodSweeper::possibly_sweep(); |
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547 |
0 | 548 MutexLocker locker(lock()); |
549 // Wait for an available CompileTask. | |
550 while (_first == NULL) { | |
551 // There is no work to be done right now. Wait. | |
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552 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { |
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553 // During the emergency sweeping periods, wake up and sweep occasionally |
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554 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); |
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555 if (timedout) { |
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556 MutexUnlocker ul(lock()); |
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557 // When otherwise not busy, run nmethod sweeping |
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558 NMethodSweeper::possibly_sweep(); |
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559 } |
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560 } else { |
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561 // During normal operation no need to wake up on timer |
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562 lock()->wait(); |
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563 } |
0 | 564 } |
1783 | 565 CompileTask* task = CompilationPolicy::policy()->select_task(this); |
566 remove(task); | |
567 return task; | |
568 } | |
0 | 569 |
1783 | 570 void CompileQueue::remove(CompileTask* task) |
571 { | |
572 assert(lock()->owned_by_self(), "must own lock"); | |
573 if (task->prev() != NULL) { | |
574 task->prev()->set_next(task->next()); | |
575 } else { | |
576 // max is the first element | |
577 assert(task == _first, "Sanity"); | |
578 _first = task->next(); | |
0 | 579 } |
580 | |
1783 | 581 if (task->next() != NULL) { |
582 task->next()->set_prev(task->prev()); | |
583 } else { | |
584 // max is the last element | |
585 assert(task == _last, "Sanity"); | |
586 _last = task->prev(); | |
587 } | |
588 --_size; | |
0 | 589 } |
590 | |
591 // ------------------------------------------------------------------ | |
592 // CompileQueue::print | |
593 void CompileQueue::print() { | |
594 tty->print_cr("Contents of %s", name()); | |
595 tty->print_cr("----------------------"); | |
596 CompileTask* task = _first; | |
597 while (task != NULL) { | |
598 task->print_line(); | |
599 task = task->next(); | |
600 } | |
601 tty->print_cr("----------------------"); | |
602 } | |
603 | |
604 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
605 | |
606 _current_method[0] = '\0'; | |
607 _compile_type = CompileBroker::no_compile; | |
608 | |
609 if (UsePerfData) { | |
610 ResourceMark rm; | |
611 | |
612 // create the thread instance name space string - don't create an | |
613 // instance subspace if instance is -1 - keeps the adapterThread | |
614 // counters from having a ".0" namespace. | |
615 const char* thread_i = (instance == -1) ? thread_name : | |
616 PerfDataManager::name_space(thread_name, instance); | |
617 | |
618 | |
619 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
620 _perf_current_method = | |
621 PerfDataManager::create_string_variable(SUN_CI, name, | |
622 cmname_buffer_length, | |
623 _current_method, CHECK); | |
624 | |
625 name = PerfDataManager::counter_name(thread_i, "type"); | |
626 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
627 PerfData::U_None, | |
628 (jlong)_compile_type, | |
629 CHECK); | |
630 | |
631 name = PerfDataManager::counter_name(thread_i, "time"); | |
632 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
633 PerfData::U_Ticks, CHECK); | |
634 | |
635 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
636 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
637 PerfData::U_Events, CHECK); | |
638 } | |
639 } | |
640 | |
641 // ------------------------------------------------------------------ | |
642 // CompileBroker::compilation_init | |
643 // | |
644 // Initialize the Compilation object | |
645 void CompileBroker::compilation_init() { | |
646 _last_method_compiled[0] = '\0'; | |
647 | |
1970 | 648 #ifndef SHARK |
0 | 649 // Set the interface to the current compiler(s). |
1783 | 650 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
651 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); | |
0 | 652 #ifdef COMPILER1 |
1783 | 653 if (c1_count > 0) { |
654 _compilers[0] = new Compiler(); | |
655 } | |
0 | 656 #endif // COMPILER1 |
657 | |
658 #ifdef COMPILER2 | |
1783 | 659 if (c2_count > 0) { |
660 _compilers[1] = new C2Compiler(); | |
661 } | |
0 | 662 #endif // COMPILER2 |
663 | |
1970 | 664 #else // SHARK |
665 int c1_count = 0; | |
666 int c2_count = 1; | |
667 | |
668 _compilers[1] = new SharkCompiler(); | |
669 #endif // SHARK | |
1692 | 670 |
0 | 671 // Initialize the CompileTask free list |
672 _task_free_list = NULL; | |
673 | |
674 // Start the CompilerThreads | |
1783 | 675 init_compiler_threads(c1_count, c2_count); |
0 | 676 // totalTime performance counter is always created as it is required |
677 // by the implementation of java.lang.management.CompilationMBean. | |
678 { | |
679 EXCEPTION_MARK; | |
680 _perf_total_compilation = | |
681 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
682 PerfData::U_Ticks, CHECK); | |
683 } | |
684 | |
685 | |
686 if (UsePerfData) { | |
687 | |
688 EXCEPTION_MARK; | |
689 | |
690 // create the jvmstat performance counters | |
691 _perf_osr_compilation = | |
692 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
693 PerfData::U_Ticks, CHECK); | |
694 | |
695 _perf_standard_compilation = | |
696 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
697 PerfData::U_Ticks, CHECK); | |
698 | |
699 _perf_total_bailout_count = | |
700 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
701 PerfData::U_Events, CHECK); | |
702 | |
703 _perf_total_invalidated_count = | |
704 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
705 PerfData::U_Events, CHECK); | |
706 | |
707 _perf_total_compile_count = | |
708 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
709 PerfData::U_Events, CHECK); | |
710 _perf_total_osr_compile_count = | |
711 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
712 PerfData::U_Events, CHECK); | |
713 | |
714 _perf_total_standard_compile_count = | |
715 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
716 PerfData::U_Events, CHECK); | |
717 | |
718 _perf_sum_osr_bytes_compiled = | |
719 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
720 PerfData::U_Bytes, CHECK); | |
721 | |
722 _perf_sum_standard_bytes_compiled = | |
723 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
724 PerfData::U_Bytes, CHECK); | |
725 | |
726 _perf_sum_nmethod_size = | |
727 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
728 PerfData::U_Bytes, CHECK); | |
729 | |
730 _perf_sum_nmethod_code_size = | |
731 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
732 PerfData::U_Bytes, CHECK); | |
733 | |
734 _perf_last_method = | |
735 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
736 CompilerCounters::cmname_buffer_length, | |
737 "", CHECK); | |
738 | |
739 _perf_last_failed_method = | |
740 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
741 CompilerCounters::cmname_buffer_length, | |
742 "", CHECK); | |
743 | |
744 _perf_last_invalidated_method = | |
745 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
746 CompilerCounters::cmname_buffer_length, | |
747 "", CHECK); | |
748 | |
749 _perf_last_compile_type = | |
750 PerfDataManager::create_variable(SUN_CI, "lastType", | |
751 PerfData::U_None, | |
752 (jlong)CompileBroker::no_compile, | |
753 CHECK); | |
754 | |
755 _perf_last_compile_size = | |
756 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
757 PerfData::U_Bytes, | |
758 (jlong)CompileBroker::no_compile, | |
759 CHECK); | |
760 | |
761 | |
762 _perf_last_failed_type = | |
763 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
764 PerfData::U_None, | |
765 (jlong)CompileBroker::no_compile, | |
766 CHECK); | |
767 | |
768 _perf_last_invalidated_type = | |
769 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
770 PerfData::U_None, | |
771 (jlong)CompileBroker::no_compile, | |
772 CHECK); | |
773 } | |
774 | |
775 _initialized = true; | |
776 } | |
777 | |
778 | |
779 | |
780 // ------------------------------------------------------------------ | |
781 // CompileBroker::make_compiler_thread | |
782 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
783 CompilerThread* compiler_thread = NULL; | |
784 | |
785 klassOop k = | |
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786 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), |
0 | 787 true, CHECK_0); |
788 instanceKlassHandle klass (THREAD, k); | |
789 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
790 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
791 | |
792 // Initialize thread_oop to put it into the system threadGroup | |
793 Handle thread_group (THREAD, Universe::system_thread_group()); | |
794 JavaValue result(T_VOID); | |
795 JavaCalls::call_special(&result, thread_oop, | |
796 klass, | |
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797 vmSymbols::object_initializer_name(), |
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798 vmSymbols::threadgroup_string_void_signature(), |
0 | 799 thread_group, |
800 string, | |
801 CHECK_0); | |
802 | |
803 { | |
804 MutexLocker mu(Threads_lock, THREAD); | |
805 compiler_thread = new CompilerThread(queue, counters); | |
806 // At this point the new CompilerThread data-races with this startup | |
807 // thread (which I believe is the primoridal thread and NOT the VM | |
808 // thread). This means Java bytecodes being executed at startup can | |
809 // queue compile jobs which will run at whatever default priority the | |
810 // newly created CompilerThread runs at. | |
811 | |
812 | |
813 // At this point it may be possible that no osthread was created for the | |
814 // JavaThread due to lack of memory. We would have to throw an exception | |
815 // in that case. However, since this must work and we do not allow | |
816 // exceptions anyway, check and abort if this fails. | |
817 | |
818 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
819 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
820 "unable to create new native thread"); | |
821 } | |
822 | |
823 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
824 | |
825 // Note that this only sets the JavaThread _priority field, which by | |
826 // definition is limited to Java priorities and not OS priorities. | |
827 // The os-priority is set in the CompilerThread startup code itself | |
828 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
829 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler | |
830 // threads never have their OS priority set. The assumption here is to | |
831 // enable the Performance group to do flag tuning, figure out a suitable | |
832 // CompilerThreadPriority, and then remove this 'if' statement (and | |
833 // comment) and unconditionally set the priority. | |
834 | |
835 // Compiler Threads should be at the highest Priority | |
836 if ( CompilerThreadPriority != -1 ) | |
837 os::set_native_priority( compiler_thread, CompilerThreadPriority ); | |
838 else | |
839 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); | |
840 | |
841 // Note that I cannot call os::set_priority because it expects Java | |
842 // priorities and I am *explicitly* using OS priorities so that it's | |
843 // possible to set the compiler thread priority higher than any Java | |
844 // thread. | |
845 | |
846 java_lang_Thread::set_daemon(thread_oop()); | |
847 | |
848 compiler_thread->set_threadObj(thread_oop()); | |
849 Threads::add(compiler_thread); | |
850 Thread::start(compiler_thread); | |
851 } | |
852 // Let go of Threads_lock before yielding | |
853 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
854 | |
855 return compiler_thread; | |
856 } | |
857 | |
858 | |
859 // ------------------------------------------------------------------ | |
860 // CompileBroker::init_compiler_threads | |
861 // | |
862 // Initialize the compilation queue | |
1783 | 863 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { |
0 | 864 EXCEPTION_MARK; |
2447 | 865 #if !defined(ZERO) && !defined(SHARK) |
1783 | 866 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
2447 | 867 #endif // !ZERO && !SHARK |
1783 | 868 if (c2_compiler_count > 0) { |
869 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); | |
870 } | |
871 if (c1_compiler_count > 0) { | |
872 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); | |
873 } | |
0 | 874 |
1783 | 875 int compiler_count = c1_compiler_count + c2_compiler_count; |
876 | |
0 | 877 _method_threads = |
878 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); | |
879 | |
880 char name_buffer[256]; | |
1783 | 881 for (int i = 0; i < c2_compiler_count; i++) { |
0 | 882 // Create a name for our thread. |
1783 | 883 sprintf(name_buffer, "C2 CompilerThread%d", i); |
0 | 884 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); |
1783 | 885 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); |
0 | 886 _method_threads->append(new_thread); |
887 } | |
1783 | 888 |
889 for (int i = c2_compiler_count; i < compiler_count; i++) { | |
890 // Create a name for our thread. | |
891 sprintf(name_buffer, "C1 CompilerThread%d", i); | |
892 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
893 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); | |
894 _method_threads->append(new_thread); | |
895 } | |
896 | |
0 | 897 if (UsePerfData) { |
898 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
899 compiler_count, CHECK); | |
900 } | |
901 } | |
902 | |
903 // ------------------------------------------------------------------ | |
904 // CompileBroker::is_idle | |
905 bool CompileBroker::is_idle() { | |
1783 | 906 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { |
907 return false; | |
908 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { | |
0 | 909 return false; |
910 } else { | |
911 int num_threads = _method_threads->length(); | |
912 for (int i=0; i<num_threads; i++) { | |
913 if (_method_threads->at(i)->task() != NULL) { | |
914 return false; | |
915 } | |
916 } | |
917 | |
918 // No pending or active compilations. | |
919 return true; | |
920 } | |
921 } | |
922 | |
923 | |
924 // ------------------------------------------------------------------ | |
925 // CompileBroker::compile_method | |
926 // | |
927 // Request compilation of a method. | |
928 void CompileBroker::compile_method_base(methodHandle method, | |
929 int osr_bci, | |
930 int comp_level, | |
931 methodHandle hot_method, | |
932 int hot_count, | |
933 const char* comment, | |
934 TRAPS) { | |
935 // do nothing if compiler thread(s) is not available | |
936 if (!_initialized ) { | |
937 return; | |
938 } | |
939 | |
940 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
941 assert(method->method_holder()->klass_part()->oop_is_instance(), | |
942 "sanity check"); | |
943 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), | |
944 "method holder must be initialized"); | |
945 | |
946 if (CIPrintRequests) { | |
947 tty->print("request: "); | |
948 method->print_short_name(tty); | |
949 if (osr_bci != InvocationEntryBci) { | |
950 tty->print(" osr_bci: %d", osr_bci); | |
951 } | |
952 tty->print(" comment: %s count: %d", comment, hot_count); | |
953 if (!hot_method.is_null()) { | |
954 tty->print(" hot: "); | |
955 if (hot_method() != method()) { | |
956 hot_method->print_short_name(tty); | |
957 } else { | |
958 tty->print("yes"); | |
959 } | |
960 } | |
961 tty->cr(); | |
962 } | |
963 | |
964 // A request has been made for compilation. Before we do any | |
965 // real work, check to see if the method has been compiled | |
966 // in the meantime with a definitive result. | |
967 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
968 return; | |
969 } | |
970 | |
2403 | 971 #ifndef PRODUCT |
972 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { | |
973 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { | |
974 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. | |
975 return; | |
976 } | |
977 } | |
978 #endif | |
1783 | 979 |
0 | 980 // If this method is already in the compile queue, then |
981 // we do not block the current thread. | |
982 if (compilation_is_in_queue(method, osr_bci)) { | |
983 // We may want to decay our counter a bit here to prevent | |
984 // multiple denied requests for compilation. This is an | |
985 // open compilation policy issue. Note: The other possibility, | |
986 // in the case that this is a blocking compile request, is to have | |
987 // all subsequent blocking requesters wait for completion of | |
988 // ongoing compiles. Note that in this case we'll need a protocol | |
989 // for freeing the associated compile tasks. [Or we could have | |
990 // a single static monitor on which all these waiters sleep.] | |
991 return; | |
992 } | |
993 | |
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994 // If the requesting thread is holding the pending list lock |
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995 // then we just return. We can't risk blocking while holding |
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996 // the pending list lock or a 3-way deadlock may occur |
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997 // between the reference handler thread, a GC (instigated |
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998 // by a compiler thread), and compiled method registration. |
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999 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) { |
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1000 return; |
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1001 } |
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1002 |
0 | 1003 // Outputs from the following MutexLocker block: |
1004 CompileTask* task = NULL; | |
1005 bool blocking = false; | |
1783 | 1006 CompileQueue* queue = compile_queue(comp_level); |
0 | 1007 |
1008 // Acquire our lock. | |
1009 { | |
1783 | 1010 MutexLocker locker(queue->lock(), THREAD); |
0 | 1011 |
1012 // Make sure the method has not slipped into the queues since | |
1013 // last we checked; note that those checks were "fast bail-outs". | |
1014 // Here we need to be more careful, see 14012000 below. | |
1015 if (compilation_is_in_queue(method, osr_bci)) { | |
1016 return; | |
1017 } | |
1018 | |
1019 // We need to check again to see if the compilation has | |
1020 // completed. A previous compilation may have registered | |
1021 // some result. | |
1022 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1023 return; | |
1024 } | |
1025 | |
1026 // We now know that this compilation is not pending, complete, | |
1027 // or prohibited. Assign a compile_id to this compilation | |
1028 // and check to see if it is in our [Start..Stop) range. | |
1029 uint compile_id = assign_compile_id(method, osr_bci); | |
1030 if (compile_id == 0) { | |
1031 // The compilation falls outside the allowed range. | |
1032 return; | |
1033 } | |
1034 | |
1035 // Should this thread wait for completion of the compile? | |
1036 blocking = is_compile_blocking(method, osr_bci); | |
1037 | |
1038 // We will enter the compilation in the queue. | |
1039 // 14012000: Note that this sets the queued_for_compile bits in | |
1040 // the target method. We can now reason that a method cannot be | |
1041 // queued for compilation more than once, as follows: | |
1042 // Before a thread queues a task for compilation, it first acquires | |
1043 // the compile queue lock, then checks if the method's queued bits | |
1044 // are set or it has already been compiled. Thus there can not be two | |
1045 // instances of a compilation task for the same method on the | |
1046 // compilation queue. Consider now the case where the compilation | |
1047 // thread has already removed a task for that method from the queue | |
1048 // and is in the midst of compiling it. In this case, the | |
1049 // queued_for_compile bits must be set in the method (and these | |
1050 // will be visible to the current thread, since the bits were set | |
1051 // under protection of the compile queue lock, which we hold now. | |
1052 // When the compilation completes, the compiler thread first sets | |
1053 // the compilation result and then clears the queued_for_compile | |
1054 // bits. Neither of these actions are protected by a barrier (or done | |
1055 // under the protection of a lock), so the only guarantee we have | |
1056 // (on machines with TSO (Total Store Order)) is that these values | |
1057 // will update in that order. As a result, the only combinations of | |
1058 // these bits that the current thread will see are, in temporal order: | |
1059 // <RESULT, QUEUE> : | |
1060 // <0, 1> : in compile queue, but not yet compiled | |
1061 // <1, 1> : compiled but queue bit not cleared | |
1062 // <1, 0> : compiled and queue bit cleared | |
1063 // Because we first check the queue bits then check the result bits, | |
1064 // we are assured that we cannot introduce a duplicate task. | |
1065 // Note that if we did the tests in the reverse order (i.e. check | |
1066 // result then check queued bit), we could get the result bit before | |
1067 // the compilation completed, and the queue bit after the compilation | |
1068 // completed, and end up introducing a "duplicate" (redundant) task. | |
1069 // In that case, the compiler thread should first check if a method | |
1070 // has already been compiled before trying to compile it. | |
1071 // NOTE: in the event that there are multiple compiler threads and | |
1072 // there is de-optimization/recompilation, things will get hairy, | |
1073 // and in that case it's best to protect both the testing (here) of | |
1074 // these bits, and their updating (here and elsewhere) under a | |
1075 // common lock. | |
1783 | 1076 task = create_compile_task(queue, |
0 | 1077 compile_id, method, |
1078 osr_bci, comp_level, | |
1079 hot_method, hot_count, comment, | |
1080 blocking); | |
1081 } | |
1082 | |
1083 if (blocking) { | |
1084 wait_for_completion(task); | |
1085 } | |
1086 } | |
1087 | |
1088 | |
1089 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
1783 | 1090 int comp_level, |
0 | 1091 methodHandle hot_method, int hot_count, |
1092 const char* comment, TRAPS) { | |
1093 // make sure arguments make sense | |
1094 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); | |
1095 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); | |
1096 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
1097 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); | |
1098 | |
1783 | 1099 if (!TieredCompilation) { |
1100 comp_level = CompLevel_highest_tier; | |
0 | 1101 } |
1102 | |
1103 // return quickly if possible | |
1104 | |
1105 // lock, make sure that the compilation | |
1106 // isn't prohibited in a straightforward way. | |
1107 | |
1108 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
1109 return NULL; | |
1110 } | |
1111 | |
1112 if (osr_bci == InvocationEntryBci) { | |
1113 // standard compilation | |
1114 nmethod* method_code = method->code(); | |
1783 | 1115 if (method_code != NULL) { |
1116 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
1117 return method_code; | |
1118 } | |
0 | 1119 } |
1120 if (method->is_not_compilable(comp_level)) return NULL; | |
1202 | 1121 |
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1122 if (UseCodeCacheFlushing) { |
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1123 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1124 if (saved != NULL) { |
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1125 method->set_code(method, saved); |
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1126 return saved; |
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1127 } |
1202 | 1128 } |
1129 | |
0 | 1130 } else { |
1131 // osr compilation | |
1132 #ifndef TIERED | |
1133 // seems like an assert of dubious value | |
1783 | 1134 assert(comp_level == CompLevel_highest_tier, |
0 | 1135 "all OSR compiles are assumed to be at a single compilation lavel"); |
1136 #endif // TIERED | |
1783 | 1137 // We accept a higher level osr method |
1138 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1139 if (nm != NULL) return nm; |
1140 if (method->is_not_osr_compilable()) return NULL; | |
1141 } | |
1142 | |
1143 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
1144 // some prerequisites that are compiler specific | |
2447 | 1145 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) { |
0 | 1146 method->constants()->resolve_string_constants(CHECK_0); |
1147 // Resolve all classes seen in the signature of the method | |
1148 // we are compiling. | |
1149 methodOopDesc::load_signature_classes(method, CHECK_0); | |
1150 } | |
1151 | |
1152 // If the method is native, do the lookup in the thread requesting | |
1153 // the compilation. Native lookups can load code, which is not | |
1154 // permitted during compilation. | |
1155 // | |
1156 // Note: A native method implies non-osr compilation which is | |
1157 // checked with an assertion at the entry of this method. | |
1158 if (method->is_native()) { | |
1159 bool in_base_library; | |
1160 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
1161 if (HAS_PENDING_EXCEPTION) { | |
1162 // In case of an exception looking up the method, we just forget | |
1163 // about it. The interpreter will kick-in and throw the exception. | |
1164 method->set_not_compilable(); // implies is_not_osr_compilable() | |
1165 CLEAR_PENDING_EXCEPTION; | |
1166 return NULL; | |
1167 } | |
1168 assert(method->has_native_function(), "must have native code by now"); | |
1169 } | |
1170 | |
1171 // RedefineClasses() has replaced this method; just return | |
1172 if (method->is_old()) { | |
1173 return NULL; | |
1174 } | |
1175 | |
1176 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
1177 // a lock the compiling thread can not acquire. Prefetch it here. | |
1178 if (JvmtiExport::should_post_compiled_method_load()) { | |
1179 method->jmethod_id(); | |
1180 } | |
1181 | |
1202 | 1182 // If the compiler is shut off due to code cache flushing or otherwise, |
1183 // fail out now so blocking compiles dont hang the java thread | |
1184 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
1783 | 1185 CompilationPolicy::policy()->delay_compilation(method()); |
1202 | 1186 return NULL; |
1187 } | |
1188 | |
0 | 1189 // do the compilation |
1190 if (method->is_native()) { | |
1191 if (!PreferInterpreterNativeStubs) { | |
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1192 // Acquire our lock. |
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1193 int compile_id; |
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1194 { |
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1195 MutexLocker locker(MethodCompileQueue_lock, THREAD); |
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1196 compile_id = assign_compile_id(method, standard_entry_bci); |
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1197 } |
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1198 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); |
0 | 1199 } else { |
1200 return NULL; | |
1201 } | |
1202 } else { | |
1203 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); | |
1204 } | |
1205 | |
1206 // return requested nmethod | |
1783 | 1207 // We accept a higher level osr method |
1208 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
0 | 1209 } |
1210 | |
1211 | |
1212 // ------------------------------------------------------------------ | |
1213 // CompileBroker::compilation_is_complete | |
1214 // | |
1215 // See if compilation of this method is already complete. | |
1216 bool CompileBroker::compilation_is_complete(methodHandle method, | |
1217 int osr_bci, | |
1218 int comp_level) { | |
1219 bool is_osr = (osr_bci != standard_entry_bci); | |
1220 if (is_osr) { | |
1221 if (method->is_not_osr_compilable()) { | |
1222 return true; | |
1223 } else { | |
1783 | 1224 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
0 | 1225 return (result != NULL); |
1226 } | |
1227 } else { | |
1228 if (method->is_not_compilable(comp_level)) { | |
1229 return true; | |
1230 } else { | |
1231 nmethod* result = method->code(); | |
1232 if (result == NULL) return false; | |
1783 | 1233 return comp_level == result->comp_level(); |
0 | 1234 } |
1235 } | |
1236 } | |
1237 | |
1238 | |
1239 // ------------------------------------------------------------------ | |
1240 // CompileBroker::compilation_is_in_queue | |
1241 // | |
1242 // See if this compilation is already requested. | |
1243 // | |
1244 // Implementation note: there is only a single "is in queue" bit | |
1245 // for each method. This means that the check below is overly | |
1246 // conservative in the sense that an osr compilation in the queue | |
1247 // will block a normal compilation from entering the queue (and vice | |
1248 // versa). This can be remedied by a full queue search to disambiguate | |
1249 // cases. If it is deemed profitible, this may be done. | |
1250 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
1783 | 1251 int osr_bci) { |
0 | 1252 return method->queued_for_compilation(); |
1253 } | |
1254 | |
1255 // ------------------------------------------------------------------ | |
1256 // CompileBroker::compilation_is_prohibited | |
1257 // | |
1258 // See if this compilation is not allowed. | |
1259 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
1260 bool is_native = method->is_native(); | |
1261 // Some compilers may not support the compilation of natives. | |
1262 if (is_native && | |
1263 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
1783 | 1264 method->set_not_compilable_quietly(comp_level); |
0 | 1265 return true; |
1266 } | |
1267 | |
1268 bool is_osr = (osr_bci != standard_entry_bci); | |
1269 // Some compilers may not support on stack replacement. | |
1270 if (is_osr && | |
1271 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
1272 method->set_not_osr_compilable(); | |
1273 return true; | |
1274 } | |
1275 | |
1276 // The method may be explicitly excluded by the user. | |
1277 bool quietly; | |
1278 if (CompilerOracle::should_exclude(method, quietly)) { | |
1279 if (!quietly) { | |
1280 // This does not happen quietly... | |
1281 ResourceMark rm; | |
1282 tty->print("### Excluding %s:%s", | |
1283 method->is_native() ? "generation of native wrapper" : "compile", | |
1284 (method->is_static() ? " static" : "")); | |
1285 method->print_short_name(tty); | |
1286 tty->cr(); | |
1287 } | |
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1288 method->set_not_compilable_quietly(); |
0 | 1289 } |
1290 | |
1291 return false; | |
1292 } | |
1293 | |
1294 | |
1295 // ------------------------------------------------------------------ | |
1296 // CompileBroker::assign_compile_id | |
1297 // | |
1298 // Assign a serialized id number to this compilation request. If the | |
1299 // number falls out of the allowed range, return a 0. OSR | |
1300 // compilations may be numbered separately from regular compilations | |
1301 // if certain debugging flags are used. | |
1302 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
1783 | 1303 assert(MethodCompileQueue_lock->owner() == Thread::current(), |
0 | 1304 "must hold the compilation queue lock"); |
1305 bool is_osr = (osr_bci != standard_entry_bci); | |
1306 uint id; | |
1307 if (CICountOSR && is_osr) { | |
1308 id = ++_osr_compilation_id; | |
1309 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
1310 return id; | |
1311 } | |
1312 } else { | |
1313 id = ++_compilation_id; | |
1314 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
1315 return id; | |
1316 } | |
1317 } | |
1318 | |
1319 // Method was not in the appropriate compilation range. | |
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1320 method->set_not_compilable_quietly(); |
0 | 1321 return 0; |
1322 } | |
1323 | |
1324 | |
1325 // ------------------------------------------------------------------ | |
1326 // CompileBroker::is_compile_blocking | |
1327 // | |
1328 // Should the current thread be blocked until this compilation request | |
1329 // has been fulfilled? | |
1330 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
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1331 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); |
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1332 return !BackgroundCompilation; |
0 | 1333 } |
1334 | |
1335 | |
1336 // ------------------------------------------------------------------ | |
1337 // CompileBroker::preload_classes | |
1338 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
1339 // Move this code over from c1_Compiler.cpp | |
1340 ShouldNotReachHere(); | |
1341 } | |
1342 | |
1343 | |
1344 // ------------------------------------------------------------------ | |
1345 // CompileBroker::create_compile_task | |
1346 // | |
1347 // Create a CompileTask object representing the current request for | |
1348 // compilation. Add this task to the queue. | |
1349 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
1350 int compile_id, | |
1351 methodHandle method, | |
1352 int osr_bci, | |
1353 int comp_level, | |
1354 methodHandle hot_method, | |
1355 int hot_count, | |
1356 const char* comment, | |
1357 bool blocking) { | |
1358 CompileTask* new_task = allocate_task(); | |
1359 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
1360 hot_method, hot_count, comment, | |
1361 blocking); | |
1362 queue->add(new_task); | |
1363 return new_task; | |
1364 } | |
1365 | |
1366 | |
1367 // ------------------------------------------------------------------ | |
1368 // CompileBroker::allocate_task | |
1369 // | |
1370 // Allocate a CompileTask, from the free list if possible. | |
1371 CompileTask* CompileBroker::allocate_task() { | |
1372 MutexLocker locker(CompileTaskAlloc_lock); | |
1373 CompileTask* task = NULL; | |
1374 if (_task_free_list != NULL) { | |
1375 task = _task_free_list; | |
1376 _task_free_list = task->next(); | |
1377 task->set_next(NULL); | |
1378 } else { | |
1379 task = new CompileTask(); | |
1380 task->set_next(NULL); | |
1381 } | |
1382 return task; | |
1383 } | |
1384 | |
1385 | |
1386 // ------------------------------------------------------------------ | |
1387 // CompileBroker::free_task | |
1388 // | |
1389 // Add a task to the free list. | |
1390 void CompileBroker::free_task(CompileTask* task) { | |
1391 MutexLocker locker(CompileTaskAlloc_lock); | |
1392 task->free(); | |
1393 task->set_next(_task_free_list); | |
1394 _task_free_list = task; | |
1395 } | |
1396 | |
1397 | |
1398 // ------------------------------------------------------------------ | |
1399 // CompileBroker::wait_for_completion | |
1400 // | |
1401 // Wait for the given method CompileTask to complete. | |
1402 void CompileBroker::wait_for_completion(CompileTask* task) { | |
1403 if (CIPrintCompileQueue) { | |
1404 tty->print_cr("BLOCKING FOR COMPILE"); | |
1405 } | |
1406 | |
1407 assert(task->is_blocking(), "can only wait on blocking task"); | |
1408 | |
1409 JavaThread *thread = JavaThread::current(); | |
1410 thread->set_blocked_on_compilation(true); | |
1411 | |
1412 methodHandle method(thread, | |
1413 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1414 { | |
1415 MutexLocker waiter(task->lock(), thread); | |
1416 | |
1417 while (!task->is_complete()) | |
1418 task->lock()->wait(); | |
1419 } | |
1420 // It is harmless to check this status without the lock, because | |
1421 // completion is a stable property (until the task object is recycled). | |
1422 assert(task->is_complete(), "Compilation should have completed"); | |
1423 assert(task->code_handle() == NULL, "must be reset"); | |
1424 | |
1425 thread->set_blocked_on_compilation(false); | |
1426 | |
1427 // By convention, the waiter is responsible for recycling a | |
1428 // blocking CompileTask. Since there is only one waiter ever | |
1429 // waiting on a CompileTask, we know that no one else will | |
1430 // be using this CompileTask; we can free it. | |
1431 free_task(task); | |
1432 } | |
1433 | |
1434 // ------------------------------------------------------------------ | |
1435 // CompileBroker::compiler_thread_loop | |
1436 // | |
1437 // The main loop run by a CompilerThread. | |
1438 void CompileBroker::compiler_thread_loop() { | |
1439 CompilerThread* thread = CompilerThread::current(); | |
1440 CompileQueue* queue = thread->queue(); | |
1441 | |
1442 // For the thread that initializes the ciObjectFactory | |
1443 // this resource mark holds all the shared objects | |
1444 ResourceMark rm; | |
1445 | |
1446 // First thread to get here will initialize the compiler interface | |
1447 | |
1448 if (!ciObjectFactory::is_initialized()) { | |
1449 ASSERT_IN_VM; | |
1450 MutexLocker only_one (CompileThread_lock, thread); | |
1451 if (!ciObjectFactory::is_initialized()) { | |
1452 ciObjectFactory::initialize(); | |
1453 } | |
1454 } | |
1455 | |
1456 // Open a log. | |
1457 if (LogCompilation) { | |
1458 init_compiler_thread_log(); | |
1459 } | |
1460 CompileLog* log = thread->log(); | |
1461 if (log != NULL) { | |
1462 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", | |
1463 os::current_thread_id(), | |
1464 os::current_process_id()); | |
1465 log->stamp(); | |
1466 log->end_elem(); | |
1467 } | |
1468 | |
1469 while (true) { | |
1470 { | |
1471 // We need this HandleMark to avoid leaking VM handles. | |
1472 HandleMark hm(thread); | |
1202 | 1473 |
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1474 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { |
1202 | 1475 // the code cache is really full |
1476 handle_full_code_cache(); | |
1477 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
1478 // Attempt to start cleaning the code cache while there is still a little headroom | |
1479 NMethodSweeper::handle_full_code_cache(false); | |
0 | 1480 } |
1481 | |
1482 CompileTask* task = queue->get(); | |
1483 | |
1484 // Give compiler threads an extra quanta. They tend to be bursty and | |
1485 // this helps the compiler to finish up the job. | |
1486 if( CompilerThreadHintNoPreempt ) | |
1487 os::hint_no_preempt(); | |
1488 | |
1489 // trace per thread time and compile statistics | |
1490 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
1491 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
1492 | |
1493 // Assign the task to the current thread. Mark this compilation | |
1494 // thread as active for the profiler. | |
1495 CompileTaskWrapper ctw(task); | |
1496 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
1497 task->set_code_handle(&result_handle); | |
1498 methodHandle method(thread, | |
1499 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1500 | |
1501 // Never compile a method if breakpoints are present in it | |
1502 if (method()->number_of_breakpoints() == 0) { | |
1503 // Compile the method. | |
1202 | 1504 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
0 | 1505 #ifdef COMPILER1 |
1506 // Allow repeating compilations for the purpose of benchmarking | |
1507 // compile speed. This is not useful for customers. | |
1508 if (CompilationRepeat != 0) { | |
1509 int compile_count = CompilationRepeat; | |
1510 while (compile_count > 0) { | |
1511 invoke_compiler_on_method(task); | |
1512 nmethod* nm = method->code(); | |
1513 if (nm != NULL) { | |
1514 nm->make_zombie(); | |
1515 method->clear_code(); | |
1516 } | |
1517 compile_count--; | |
1518 } | |
1519 } | |
1520 #endif /* COMPILER1 */ | |
1521 invoke_compiler_on_method(task); | |
1522 } else { | |
1523 // After compilation is disabled, remove remaining methods from queue | |
1524 method->clear_queued_for_compilation(); | |
1525 } | |
1526 } | |
1527 } | |
1528 } | |
1529 } | |
1530 | |
1531 | |
1532 // ------------------------------------------------------------------ | |
1533 // CompileBroker::init_compiler_thread_log | |
1534 // | |
1535 // Set up state required by +LogCompilation. | |
1536 void CompileBroker::init_compiler_thread_log() { | |
1537 CompilerThread* thread = CompilerThread::current(); | |
1538 char fileBuf[4*K]; | |
1539 FILE* fp = NULL; | |
1540 char* file = NULL; | |
1541 intx thread_id = os::current_thread_id(); | |
1542 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
1543 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
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1544 if (dir == NULL) { |
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1545 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
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1546 thread_id, os::current_process_id()); |
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1547 } else { |
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1548 jio_snprintf(fileBuf, sizeof(fileBuf), |
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1549 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
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1550 os::file_separator(), thread_id, os::current_process_id()); |
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1551 } |
0 | 1552 fp = fopen(fileBuf, "at"); |
1553 if (fp != NULL) { | |
1554 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); | |
1555 strcpy(file, fileBuf); | |
1556 break; | |
1557 } | |
1558 } | |
1559 if (fp == NULL) { | |
1560 warning("Cannot open log file: %s", fileBuf); | |
1561 } else { | |
1562 if (LogCompilation && Verbose) | |
1563 tty->print_cr("Opening compilation log %s", file); | |
1564 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); | |
1565 thread->init_log(log); | |
1566 | |
1567 if (xtty != NULL) { | |
1568 ttyLocker ttyl; | |
1569 | |
1570 // Record any per thread log files | |
1571 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
1572 } | |
1573 } | |
1574 } | |
1575 | |
1576 // ------------------------------------------------------------------ | |
1577 // CompileBroker::set_should_block | |
1578 // | |
1579 // Set _should_block. | |
1580 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
1581 void CompileBroker::set_should_block() { | |
1582 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
1583 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
1584 #ifndef PRODUCT | |
1585 if (PrintCompilation && (Verbose || WizardMode)) | |
1586 tty->print_cr("notifying compiler thread pool to block"); | |
1587 #endif | |
1588 _should_block = true; | |
1589 } | |
1590 | |
1591 // ------------------------------------------------------------------ | |
1592 // CompileBroker::maybe_block | |
1593 // | |
1594 // Call this from the compiler at convenient points, to poll for _should_block. | |
1595 void CompileBroker::maybe_block() { | |
1596 if (_should_block) { | |
1597 #ifndef PRODUCT | |
1598 if (PrintCompilation && (Verbose || WizardMode)) | |
1599 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
1600 #endif | |
1601 ThreadInVMfromNative tivfn(JavaThread::current()); | |
1602 } | |
1603 } | |
1604 | |
1605 | |
1606 // ------------------------------------------------------------------ | |
1607 // CompileBroker::invoke_compiler_on_method | |
1608 // | |
1609 // Compile a method. | |
1610 // | |
1611 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
1612 if (PrintCompilation) { | |
1613 ResourceMark rm; | |
1614 task->print_line(); | |
1615 } | |
1616 elapsedTimer time; | |
1617 | |
1618 CompilerThread* thread = CompilerThread::current(); | |
1619 ResourceMark rm(thread); | |
1620 | |
1621 // Common flags. | |
1622 uint compile_id = task->compile_id(); | |
1623 int osr_bci = task->osr_bci(); | |
1624 bool is_osr = (osr_bci != standard_entry_bci); | |
1625 bool should_log = (thread->log() != NULL); | |
1626 bool should_break = false; | |
1627 { | |
1628 // create the handle inside it's own block so it can't | |
1629 // accidentally be referenced once the thread transitions to | |
1630 // native. The NoHandleMark before the transition should catch | |
1631 // any cases where this occurs in the future. | |
1632 methodHandle method(thread, | |
1633 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1634 should_break = check_break_at(method, compile_id, is_osr); | |
1635 if (should_log && !CompilerOracle::should_log(method)) { | |
1636 should_log = false; | |
1637 } | |
1638 assert(!method->is_native(), "no longer compile natives"); | |
1639 | |
1640 // Save information about this method in case of failure. | |
1641 set_last_compile(thread, method, is_osr, task->comp_level()); | |
1642 | |
1643 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
1644 } | |
1645 | |
1646 // Allocate a new set of JNI handles. | |
1647 push_jni_handle_block(); | |
1648 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); | |
1649 int compilable = ciEnv::MethodCompilable; | |
1650 { | |
1651 int system_dictionary_modification_counter; | |
1652 { | |
1653 MutexLocker locker(Compile_lock, thread); | |
1654 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
1655 } | |
1656 | |
1657 NoHandleMark nhm; | |
1658 ThreadToNativeFromVM ttn(thread); | |
1659 | |
1660 ciEnv ci_env(task, system_dictionary_modification_counter); | |
1661 if (should_break) { | |
1662 ci_env.set_break_at_compile(true); | |
1663 } | |
1664 if (should_log) { | |
1665 ci_env.set_log(thread->log()); | |
1666 } | |
1667 assert(thread->env() == &ci_env, "set by ci_env"); | |
1668 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
1669 | |
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1670 // Cache Jvmti state |
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1671 ci_env.cache_jvmti_state(); |
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1672 |
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1673 // Cache DTrace flags |
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1674 ci_env.cache_dtrace_flags(); |
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1675 |
0 | 1676 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
1677 | |
1678 TraceTime t1("compilation", &time); | |
1679 | |
1680 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
1681 | |
1682 if (!ci_env.failing() && task->code() == NULL) { | |
1683 //assert(false, "compiler should always document failure"); | |
1684 // The compiler elected, without comment, not to register a result. | |
1685 // Do not attempt further compilations of this method. | |
1964
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1686 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
0 | 1687 } |
1688 | |
1689 if (ci_env.failing()) { | |
1690 // Copy this bit to the enclosing block: | |
1691 compilable = ci_env.compilable(); | |
1692 if (PrintCompilation) { | |
1693 const char* reason = ci_env.failure_reason(); | |
1694 if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
1695 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); | |
1964
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1696 } else if (compilable == ciEnv::MethodCompilable_never) { |
0 | 1697 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); |
1698 } else if (compilable == ciEnv::MethodCompilable) { | |
1699 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason); | |
1700 } | |
1701 } | |
1702 } else { | |
1703 task->mark_success(); | |
1704 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
1705 } | |
1706 } | |
1707 pop_jni_handle_block(); | |
1708 | |
1709 methodHandle method(thread, | |
1710 (methodOop)JNIHandles::resolve(task->method_handle())); | |
1711 | |
1712 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
1713 | |
1714 collect_statistics(thread, time, task); | |
1715 | |
1716 if (compilable == ciEnv::MethodCompilable_never) { | |
1717 if (is_osr) { | |
1718 method->set_not_osr_compilable(); | |
1719 } else { | |
1208
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1720 method->set_not_compilable_quietly(); |
0 | 1721 } |
1722 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
1208
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1723 method->set_not_compilable_quietly(task->comp_level()); |
0 | 1724 } |
1725 | |
1726 // Note that the queued_for_compilation bits are cleared without | |
1727 // protection of a mutex. [They were set by the requester thread, | |
1728 // when adding the task to the complie queue -- at which time the | |
1729 // compile queue lock was held. Subsequently, we acquired the compile | |
1730 // queue lock to get this task off the compile queue; thus (to belabour | |
1731 // the point somewhat) our clearing of the bits must be occurring | |
1732 // only after the setting of the bits. See also 14012000 above. | |
1733 method->clear_queued_for_compilation(); | |
1734 | |
1735 #ifdef ASSERT | |
1736 if (CollectedHeap::fired_fake_oom()) { | |
1737 // The current compile received a fake OOM during compilation so | |
1738 // go ahead and exit the VM since the test apparently succeeded | |
1739 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
1740 vm_exit(0); | |
1741 } | |
1742 #endif | |
1743 } | |
1744 | |
1745 // ------------------------------------------------------------------ | |
1202 | 1746 // CompileBroker::handle_full_code_cache |
1747 // | |
1748 // The CodeCache is full. Print out warning and disable compilation or | |
1749 // try code cache cleaning so compilation can continue later. | |
1750 void CompileBroker::handle_full_code_cache() { | |
1751 UseInterpreter = true; | |
1752 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
1728
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1753 if (xtty != NULL) { |
2482
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1754 stringStream s; |
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1755 // Dump code cache state into a buffer before locking the tty, |
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1756 // because log_state() will use locks causing lock conflicts. |
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1757 CodeCache::log_state(&s); |
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1758 // Lock to prevent tearing |
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1759 ttyLocker ttyl; |
1728
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1760 xtty->begin_elem("code_cache_full"); |
2482
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1761 xtty->print(s.as_string()); |
1728
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1762 xtty->stamp(); |
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1763 xtty->end_elem(); |
1202 | 1764 } |
1578
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1765 warning("CodeCache is full. Compiler has been disabled."); |
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1766 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); |
2353
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1767 CodeCache::print_bounds(tty); |
1578
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1768 #ifndef PRODUCT |
1202 | 1769 if (CompileTheWorld || ExitOnFullCodeCache) { |
1770 before_exit(JavaThread::current()); | |
1771 exit_globals(); // will delete tty | |
1772 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
1773 } | |
1578
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1774 #endif |
1202 | 1775 if (UseCodeCacheFlushing) { |
1776 NMethodSweeper::handle_full_code_cache(true); | |
1777 } else { | |
1778 UseCompiler = false; | |
1779 AlwaysCompileLoopMethods = false; | |
1780 } | |
1781 } | |
1782 } | |
1783 | |
1784 // ------------------------------------------------------------------ | |
0 | 1785 // CompileBroker::set_last_compile |
1786 // | |
1787 // Record this compilation for debugging purposes. | |
1788 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
1789 ResourceMark rm; | |
1790 char* method_name = method->name()->as_C_string(); | |
1791 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
1792 char current_method[CompilerCounters::cmname_buffer_length]; | |
1793 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
1794 | |
1795 if (UsePerfData) { | |
1796 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); | |
1797 | |
1798 size_t s1len = strlen(class_name); | |
1799 size_t s2len = strlen(method_name); | |
1800 | |
1801 // check if we need to truncate the string | |
1802 if (s1len + s2len + 2 > maxLen) { | |
1803 | |
1804 // the strategy is to lop off the leading characters of the | |
1805 // class name and the trailing characters of the method name. | |
1806 | |
1807 if (s2len + 2 > maxLen) { | |
1808 // lop of the entire class name string, let snprintf handle | |
1809 // truncation of the method name. | |
1810 class_name += s1len; // null string | |
1811 } | |
1812 else { | |
1813 // lop off the extra characters from the front of the class name | |
1814 class_name += ((s1len + s2len + 2) - maxLen); | |
1815 } | |
1816 } | |
1817 | |
1818 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
1819 } | |
1820 | |
1821 if (CICountOSR && is_osr) { | |
1822 _last_compile_type = osr_compile; | |
1823 } else { | |
1824 _last_compile_type = normal_compile; | |
1825 } | |
1826 _last_compile_level = comp_level; | |
1827 | |
1828 if (UsePerfData) { | |
1829 CompilerCounters* counters = thread->counters(); | |
1830 counters->set_current_method(current_method); | |
1831 counters->set_compile_type((jlong)_last_compile_type); | |
1832 } | |
1833 } | |
1834 | |
1835 | |
1836 // ------------------------------------------------------------------ | |
1837 // CompileBroker::push_jni_handle_block | |
1838 // | |
1839 // Push on a new block of JNI handles. | |
1840 void CompileBroker::push_jni_handle_block() { | |
1841 JavaThread* thread = JavaThread::current(); | |
1842 | |
1843 // Allocate a new block for JNI handles. | |
1844 // Inlined code from jni_PushLocalFrame() | |
1845 JNIHandleBlock* java_handles = thread->active_handles(); | |
1846 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
1847 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
1848 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
1849 thread->set_active_handles(compile_handles); | |
1850 } | |
1851 | |
1852 | |
1853 // ------------------------------------------------------------------ | |
1854 // CompileBroker::pop_jni_handle_block | |
1855 // | |
1856 // Pop off the current block of JNI handles. | |
1857 void CompileBroker::pop_jni_handle_block() { | |
1858 JavaThread* thread = JavaThread::current(); | |
1859 | |
1860 // Release our JNI handle block | |
1861 JNIHandleBlock* compile_handles = thread->active_handles(); | |
1862 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
1863 thread->set_active_handles(java_handles); | |
1864 compile_handles->set_pop_frame_link(NULL); | |
1865 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
1866 } | |
1867 | |
1868 | |
1869 // ------------------------------------------------------------------ | |
1870 // CompileBroker::check_break_at | |
1871 // | |
1872 // Should the compilation break at the current compilation. | |
1873 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
1874 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
1875 return true; | |
1876 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
1877 return true; | |
1878 } else { | |
1879 return (compile_id == CIBreakAt); | |
1880 } | |
1881 } | |
1882 | |
1883 // ------------------------------------------------------------------ | |
1884 // CompileBroker::collect_statistics | |
1885 // | |
1886 // Collect statistics about the compilation. | |
1887 | |
1888 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
1889 bool success = task->is_success(); | |
1890 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); | |
1891 uint compile_id = task->compile_id(); | |
1892 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
1893 nmethod* code = task->code(); | |
1894 CompilerCounters* counters = thread->counters(); | |
1895 | |
1896 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
1897 MutexLocker locker(CompileStatistics_lock); | |
1898 | |
1899 // _perf variables are production performance counters which are | |
1900 // updated regardless of the setting of the CITime and CITimeEach flags | |
1901 // | |
1902 if (!success) { | |
1903 _total_bailout_count++; | |
1904 if (UsePerfData) { | |
1905 _perf_last_failed_method->set_value(counters->current_method()); | |
1906 _perf_last_failed_type->set_value(counters->compile_type()); | |
1907 _perf_total_bailout_count->inc(); | |
1908 } | |
1909 } else if (code == NULL) { | |
1910 if (UsePerfData) { | |
1911 _perf_last_invalidated_method->set_value(counters->current_method()); | |
1912 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
1913 _perf_total_invalidated_count->inc(); | |
1914 } | |
1915 _total_invalidated_count++; | |
1916 } else { | |
1917 // Compilation succeeded | |
1918 | |
1919 // update compilation ticks - used by the implementation of | |
1920 // java.lang.management.CompilationMBean | |
1921 _perf_total_compilation->inc(time.ticks()); | |
1922 | |
1923 if (CITime) { | |
1924 _t_total_compilation.add(time); | |
1925 if (is_osr) { | |
1926 _t_osr_compilation.add(time); | |
1927 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
1928 } else { | |
1929 _t_standard_compilation.add(time); | |
1930 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
1931 } | |
1932 } | |
1933 | |
1934 if (UsePerfData) { | |
1935 // save the name of the last method compiled | |
1936 _perf_last_method->set_value(counters->current_method()); | |
1937 _perf_last_compile_type->set_value(counters->compile_type()); | |
1938 _perf_last_compile_size->set_value(method->code_size() + | |
1939 task->num_inlined_bytecodes()); | |
1940 if (is_osr) { | |
1941 _perf_osr_compilation->inc(time.ticks()); | |
1942 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
1943 } else { | |
1944 _perf_standard_compilation->inc(time.ticks()); | |
1945 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
1946 } | |
1947 } | |
1948 | |
1949 if (CITimeEach) { | |
1950 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
1951 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
1952 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
1953 } | |
1954 | |
1955 // Collect counts of successful compilations | |
1748 | 1956 _sum_nmethod_size += code->total_size(); |
1957 _sum_nmethod_code_size += code->insts_size(); | |
0 | 1958 _total_compile_count++; |
1959 | |
1960 if (UsePerfData) { | |
1748 | 1961 _perf_sum_nmethod_size->inc( code->total_size()); |
1962 _perf_sum_nmethod_code_size->inc(code->insts_size()); | |
0 | 1963 _perf_total_compile_count->inc(); |
1964 } | |
1965 | |
1966 if (is_osr) { | |
1967 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
1968 _total_osr_compile_count++; | |
1969 } else { | |
1970 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
1971 _total_standard_compile_count++; | |
1972 } | |
1973 } | |
1974 // set the current method for the thread to null | |
1975 if (UsePerfData) counters->set_current_method(""); | |
1976 } | |
1977 | |
1978 | |
1979 | |
1980 void CompileBroker::print_times() { | |
1981 tty->cr(); | |
1982 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
1983 tty->print_cr("------------------------------------------------"); | |
1984 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
1985 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
1986 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
1987 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
1988 CompileBroker::_t_standard_compilation.seconds(), | |
1989 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
1990 tty->print_cr(" On stack replacement : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count); | |
1131 | 1991 |
1783 | 1992 if (compiler(CompLevel_simple) != NULL) { |
1993 compiler(CompLevel_simple)->print_timers(); | |
0 | 1994 } |
1783 | 1995 if (compiler(CompLevel_full_optimization) != NULL) { |
1996 compiler(CompLevel_full_optimization)->print_timers(); | |
1997 } | |
0 | 1998 tty->cr(); |
1999 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
2000 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
2001 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
2002 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
2003 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
2004 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
2005 tty->cr(); | |
2006 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
2007 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
2008 } | |
2009 | |
2010 | |
2011 // Debugging output for failure | |
2012 void CompileBroker::print_last_compile() { | |
2013 if ( _last_compile_level != CompLevel_none && | |
2014 compiler(_last_compile_level) != NULL && | |
2015 _last_method_compiled != NULL && | |
2016 _last_compile_type != no_compile) { | |
2017 if (_last_compile_type == osr_compile) { | |
2018 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
2019 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
2020 } else { | |
2021 tty->print_cr("Last parse: %d+++(%d) %s", | |
2022 _compilation_id, _last_compile_level, _last_method_compiled); | |
2023 } | |
2024 } | |
2025 } | |
2026 | |
2027 | |
2028 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
2029 #ifndef PRODUCT | |
2030 st->print_cr("Compiler thread printing unimplemented."); | |
2031 st->cr(); | |
2032 #endif | |
2033 } |