Mercurial > hg > graal-compiler
annotate src/share/vm/compiler/compileBroker.cpp @ 1478:5571b97fc1ec
More JNI global handle clean ups.
| author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
|---|---|
| date | Fri, 26 Nov 2010 19:45:05 +0100 |
| parents | 1845386f5403 |
| children | 2d26b0046e0d |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1208
cef333a48af6
6923043: failed nightly tests which use -XX:+PrintCompilation -Xcomp -XX:CompileOnly
kvn
parents:
1202
diff
changeset
|
2 * Copyright 1999-2010 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_compileBroker.cpp.incl" | |
| 27 | |
| 28 #ifdef DTRACE_ENABLED | |
| 29 | |
| 30 // Only bother with this argument setup if dtrace is available | |
| 31 | |
| 32 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, | |
| 33 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); | |
| 34 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, | |
| 35 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); | |
| 36 | |
| 37 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ | |
| 38 { \ | |
| 39 char* comp_name = (char*)(compiler)->name(); \ | |
| 40 symbolOop klass_name = (method)->klass_name(); \ | |
| 41 symbolOop name = (method)->name(); \ | |
| 42 symbolOop signature = (method)->signature(); \ | |
| 43 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ | |
| 44 comp_name, strlen(comp_name), \ | |
| 45 klass_name->bytes(), klass_name->utf8_length(), \ | |
| 46 name->bytes(), name->utf8_length(), \ | |
| 47 signature->bytes(), signature->utf8_length()); \ | |
| 48 } | |
| 49 | |
| 50 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ | |
| 51 { \ | |
| 52 char* comp_name = (char*)(compiler)->name(); \ | |
| 53 symbolOop klass_name = (method)->klass_name(); \ | |
| 54 symbolOop name = (method)->name(); \ | |
| 55 symbolOop signature = (method)->signature(); \ | |
| 56 HS_DTRACE_PROBE9(hotspot, method__compile__end, \ | |
| 57 comp_name, strlen(comp_name), \ | |
| 58 klass_name->bytes(), klass_name->utf8_length(), \ | |
| 59 name->bytes(), name->utf8_length(), \ | |
| 60 signature->bytes(), signature->utf8_length(), (success)); \ | |
| 61 } | |
| 62 | |
| 63 #else // ndef DTRACE_ENABLED | |
| 64 | |
| 65 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) | |
| 66 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) | |
| 67 | |
| 68 #endif // ndef DTRACE_ENABLED | |
| 69 | |
| 70 bool CompileBroker::_initialized = false; | |
| 71 volatile bool CompileBroker::_should_block = false; | |
| 1202 | 72 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; |
| 0 | 73 |
| 74 // The installed compiler(s) | |
| 75 AbstractCompiler* CompileBroker::_compilers[2]; | |
| 76 | |
| 77 // These counters are used for assigning id's to each compilation | |
| 78 uint CompileBroker::_compilation_id = 0; | |
| 79 uint CompileBroker::_osr_compilation_id = 0; | |
| 80 | |
| 81 // Debugging information | |
| 82 int CompileBroker::_last_compile_type = no_compile; | |
| 83 int CompileBroker::_last_compile_level = CompLevel_none; | |
| 84 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; | |
| 85 | |
| 86 // Performance counters | |
| 87 PerfCounter* CompileBroker::_perf_total_compilation = NULL; | |
| 88 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; | |
| 89 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; | |
| 90 | |
| 91 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; | |
| 92 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; | |
| 93 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; | |
| 94 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; | |
| 95 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; | |
| 96 | |
| 97 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; | |
| 98 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; | |
| 99 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; | |
| 100 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; | |
| 101 | |
| 102 PerfStringVariable* CompileBroker::_perf_last_method = NULL; | |
| 103 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; | |
| 104 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; | |
| 105 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; | |
| 106 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; | |
| 107 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; | |
| 108 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; | |
| 109 | |
| 110 // Timers and counters for generating statistics | |
| 111 elapsedTimer CompileBroker::_t_total_compilation; | |
| 112 elapsedTimer CompileBroker::_t_osr_compilation; | |
| 113 elapsedTimer CompileBroker::_t_standard_compilation; | |
| 114 | |
| 115 int CompileBroker::_total_bailout_count = 0; | |
| 116 int CompileBroker::_total_invalidated_count = 0; | |
| 117 int CompileBroker::_total_compile_count = 0; | |
| 118 int CompileBroker::_total_osr_compile_count = 0; | |
| 119 int CompileBroker::_total_standard_compile_count = 0; | |
| 120 | |
| 121 int CompileBroker::_sum_osr_bytes_compiled = 0; | |
| 122 int CompileBroker::_sum_standard_bytes_compiled = 0; | |
| 123 int CompileBroker::_sum_nmethod_size = 0; | |
| 124 int CompileBroker::_sum_nmethod_code_size = 0; | |
| 125 | |
| 126 CompileQueue* CompileBroker::_method_queue = NULL; | |
| 127 CompileTask* CompileBroker::_task_free_list = NULL; | |
| 128 | |
| 129 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; | |
| 130 | |
| 131 // CompileTaskWrapper | |
| 132 // | |
| 133 // Assign this task to the current thread. Deallocate the task | |
| 134 // when the compilation is complete. | |
| 135 class CompileTaskWrapper : StackObj { | |
| 136 public: | |
| 137 CompileTaskWrapper(CompileTask* task); | |
| 138 ~CompileTaskWrapper(); | |
| 139 }; | |
| 140 | |
| 141 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { | |
| 142 CompilerThread* thread = CompilerThread::current(); | |
| 143 thread->set_task(task); | |
| 144 CompileLog* log = thread->log(); | |
| 145 if (log != NULL) task->log_task_start(log); | |
| 146 } | |
| 147 | |
| 148 CompileTaskWrapper::~CompileTaskWrapper() { | |
| 149 CompilerThread* thread = CompilerThread::current(); | |
| 150 CompileTask* task = thread->task(); | |
| 151 CompileLog* log = thread->log(); | |
| 152 if (log != NULL) task->log_task_done(log); | |
| 153 thread->set_task(NULL); | |
| 154 task->set_code_handle(NULL); | |
| 155 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); | |
| 156 if (task->is_blocking()) { | |
| 157 MutexLocker notifier(task->lock(), thread); | |
| 158 task->mark_complete(); | |
| 159 // Notify the waiting thread that the compilation has completed. | |
| 160 task->lock()->notify_all(); | |
| 161 } else { | |
| 162 task->mark_complete(); | |
| 163 | |
| 164 // By convention, the compiling thread is responsible for | |
| 165 // recycling a non-blocking CompileTask. | |
| 166 CompileBroker::free_task(task); | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 | |
| 171 // ------------------------------------------------------------------ | |
| 172 // CompileTask::initialize | |
| 173 void CompileTask::initialize(int compile_id, | |
| 174 methodHandle method, | |
| 175 int osr_bci, | |
| 176 int comp_level, | |
| 177 methodHandle hot_method, | |
| 178 int hot_count, | |
| 179 const char* comment, | |
| 180 bool is_blocking) { | |
| 181 assert(!_lock->is_locked(), "bad locking"); | |
| 182 | |
| 183 _compile_id = compile_id; | |
| 184 _method = JNIHandles::make_global(method); | |
| 185 _osr_bci = osr_bci; | |
| 186 _is_blocking = is_blocking; | |
| 187 _comp_level = comp_level; | |
| 188 _num_inlined_bytecodes = 0; | |
| 189 | |
| 190 _is_complete = false; | |
| 191 _is_success = false; | |
| 192 _code_handle = NULL; | |
| 193 | |
| 194 _hot_method = NULL; | |
| 195 _hot_count = hot_count; | |
| 196 _time_queued = 0; // tidy | |
| 197 _comment = comment; | |
| 198 | |
| 199 if (LogCompilation) { | |
| 200 _time_queued = os::elapsed_counter(); | |
| 201 if (hot_method.not_null()) { | |
| 202 if (hot_method == method) { | |
| 203 _hot_method = _method; | |
| 204 } else { | |
| 205 _hot_method = JNIHandles::make_global(hot_method); | |
| 206 } | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 _next = NULL; | |
| 211 } | |
| 212 | |
| 213 // ------------------------------------------------------------------ | |
| 214 // CompileTask::code/set_code | |
| 215 nmethod* CompileTask::code() const { | |
| 216 if (_code_handle == NULL) return NULL; | |
| 217 return _code_handle->code(); | |
| 218 } | |
| 219 void CompileTask::set_code(nmethod* nm) { | |
| 220 if (_code_handle == NULL && nm == NULL) return; | |
| 221 guarantee(_code_handle != NULL, ""); | |
| 222 _code_handle->set_code(nm); | |
| 223 if (nm == NULL) _code_handle = NULL; // drop the handle also | |
| 224 } | |
| 225 | |
| 226 // ------------------------------------------------------------------ | |
| 227 // CompileTask::free | |
| 228 void CompileTask::free() { | |
| 229 set_code(NULL); | |
| 230 assert(!_lock->is_locked(), "Should not be locked when freed"); | |
| 231 if (_hot_method != NULL && _hot_method != _method) { | |
| 232 JNIHandles::destroy_global(_hot_method); | |
| 233 } | |
| 234 JNIHandles::destroy_global(_method); | |
| 235 } | |
| 236 | |
| 237 | |
| 238 // ------------------------------------------------------------------ | |
| 239 // CompileTask::print | |
| 240 void CompileTask::print() { | |
| 241 tty->print("<CompileTask compile_id=%d ", _compile_id); | |
| 242 tty->print("method="); | |
| 243 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); | |
| 244 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", | |
| 245 _osr_bci, bool_to_str(_is_blocking), | |
| 246 bool_to_str(_is_complete), bool_to_str(_is_success)); | |
| 247 } | |
| 248 | |
| 249 // ------------------------------------------------------------------ | |
| 250 // CompileTask::print_line_on_error | |
| 251 // | |
| 252 // This function is called by fatal error handler when the thread | |
| 253 // causing troubles is a compiler thread. | |
| 254 // | |
| 255 // Do not grab any lock, do not allocate memory. | |
| 256 // | |
| 257 // Otherwise it's the same as CompileTask::print_line() | |
| 258 // | |
| 259 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
| 260 methodOop method = (methodOop)JNIHandles::resolve(_method); | |
| 261 | |
| 262 // print compiler name | |
| 263 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
| 264 | |
| 265 // print compilation number | |
| 266 st->print("%3d", compile_id()); | |
| 267 | |
| 268 // print method attributes | |
| 269 const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci; | |
| 270 { const char blocking_char = is_blocking() ? 'b' : ' '; | |
| 271 const char compile_type = is_osr ? '%' : ' '; | |
| 272 const char sync_char = method->is_synchronized() ? 's' : ' '; | |
| 273 const char exception_char = method->has_exception_handler() ? '!' : ' '; | |
| 274 const char tier_char = | |
| 275 is_highest_tier_compile(comp_level()) ? ' ' : ('0' + comp_level()); | |
| 276 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char); | |
| 277 } | |
| 278 | |
| 279 // Use buf to get method name and signature | |
| 280 if (method != NULL) st->print("%s", method->name_and_sig_as_C_string(buf, buflen)); | |
| 281 | |
| 282 // print osr_bci if any | |
| 283 if (is_osr) st->print(" @ %d", osr_bci()); | |
| 284 | |
| 285 // print method size | |
| 286 st->print_cr(" (%d bytes)", method->code_size()); | |
| 287 } | |
| 288 | |
| 289 // ------------------------------------------------------------------ | |
| 290 // CompileTask::print_line | |
| 291 void CompileTask::print_line() { | |
| 292 Thread *thread = Thread::current(); | |
| 293 methodHandle method(thread, | |
| 294 (methodOop)JNIHandles::resolve(method_handle())); | |
| 295 ResourceMark rm(thread); | |
| 296 | |
| 297 ttyLocker ttyl; // keep the following output all in one block | |
| 298 | |
| 299 // print compiler name if requested | |
| 300 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
| 301 | |
| 302 // print compilation number | |
| 303 tty->print("%3d", compile_id()); | |
| 304 | |
| 305 // print method attributes | |
| 306 const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci; | |
| 307 { const char blocking_char = is_blocking() ? 'b' : ' '; | |
| 308 const char compile_type = is_osr ? '%' : ' '; | |
| 309 const char sync_char = method->is_synchronized() ? 's' : ' '; | |
| 310 const char exception_char = method->has_exception_handler() ? '!' : ' '; | |
| 311 const char tier_char = | |
| 312 is_highest_tier_compile(comp_level()) ? ' ' : ('0' + comp_level()); | |
| 313 tty->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char); | |
| 314 } | |
| 315 | |
| 316 // print method name | |
| 317 method->print_short_name(tty); | |
| 318 | |
| 319 // print osr_bci if any | |
| 320 if (is_osr) tty->print(" @ %d", osr_bci()); | |
| 321 | |
| 322 // print method size | |
|
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7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
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parents:
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323 tty->print(" (%d bytes)", method->code_size()); |
|
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
diff
changeset
|
324 |
|
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
diff
changeset
|
325 // invocation count |
|
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
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changeset
|
326 tty->print_cr(" %d invocations", _hot_count); |
| 0 | 327 } |
| 328 | |
| 329 | |
| 330 // ------------------------------------------------------------------ | |
| 331 // CompileTask::log_task | |
| 332 void CompileTask::log_task(xmlStream* log) { | |
| 333 Thread* thread = Thread::current(); | |
| 334 methodHandle method(thread, | |
| 335 (methodOop)JNIHandles::resolve(method_handle())); | |
| 336 ResourceMark rm(thread); | |
| 337 | |
| 338 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
| 339 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
| 340 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
| 341 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
| 342 } // else compile_kind='c2c' | |
| 343 if (!method.is_null()) log->method(method); | |
| 344 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
| 345 log->print(" osr_bci='%d'", _osr_bci); | |
| 346 } | |
| 347 if (_comp_level != CompLevel_highest_tier) { | |
| 348 log->print(" level='%d'", _comp_level); | |
| 349 } | |
| 350 if (_is_blocking) { | |
| 351 log->print(" blocking='1'"); | |
| 352 } | |
| 353 log->stamp(); | |
| 354 } | |
| 355 | |
| 356 | |
| 357 // ------------------------------------------------------------------ | |
| 358 // CompileTask::log_task_queued | |
| 359 void CompileTask::log_task_queued() { | |
| 360 Thread* thread = Thread::current(); | |
| 361 ttyLocker ttyl; | |
| 362 ResourceMark rm(thread); | |
| 363 | |
| 364 xtty->begin_elem("task_queued"); | |
| 365 log_task(xtty); | |
| 366 if (_comment != NULL) { | |
| 367 xtty->print(" comment='%s'", _comment); | |
| 368 } | |
| 369 if (_hot_method != NULL) { | |
| 370 methodHandle hot(thread, | |
| 371 (methodOop)JNIHandles::resolve(_hot_method)); | |
| 372 methodHandle method(thread, | |
| 373 (methodOop)JNIHandles::resolve(_method)); | |
| 374 if (hot() != method()) { | |
| 375 xtty->method(hot); | |
| 376 } | |
| 377 } | |
| 378 if (_hot_count != 0) { | |
| 379 xtty->print(" hot_count='%d'", _hot_count); | |
| 380 } | |
| 381 xtty->end_elem(); | |
| 382 } | |
| 383 | |
| 384 | |
| 385 // ------------------------------------------------------------------ | |
| 386 // CompileTask::log_task_start | |
| 387 void CompileTask::log_task_start(CompileLog* log) { | |
| 388 log->begin_head("task"); | |
| 389 log_task(log); | |
| 390 log->end_head(); | |
| 391 } | |
| 392 | |
| 393 | |
| 394 // ------------------------------------------------------------------ | |
| 395 // CompileTask::log_task_done | |
| 396 void CompileTask::log_task_done(CompileLog* log) { | |
| 397 Thread* thread = Thread::current(); | |
| 398 methodHandle method(thread, | |
| 399 (methodOop)JNIHandles::resolve(method_handle())); | |
| 400 ResourceMark rm(thread); | |
| 401 | |
| 402 // <task_done ... stamp='1.234'> </task> | |
| 403 nmethod* nm = code(); | |
| 404 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
| 405 _is_success, nm == NULL ? 0 : nm->instructions_size(), | |
| 406 method->invocation_count()); | |
| 407 int bec = method->backedge_count(); | |
| 408 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
| 409 // Note: "_is_complete" is about to be set, but is not. | |
| 410 if (_num_inlined_bytecodes != 0) { | |
| 411 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
| 412 } | |
| 413 log->stamp(); | |
| 414 log->end_elem(); | |
| 415 log->tail("task"); | |
| 416 log->clear_identities(); // next task will have different CI | |
| 417 if (log->unflushed_count() > 2000) { | |
| 418 log->flush(); | |
| 419 } | |
| 420 log->mark_file_end(); | |
| 421 } | |
| 422 | |
| 423 | |
| 424 | |
| 425 // ------------------------------------------------------------------ | |
| 426 // CompileQueue::add | |
| 427 // | |
| 428 // Add a CompileTask to a CompileQueue | |
| 429 void CompileQueue::add(CompileTask* task) { | |
| 430 assert(lock()->owned_by_self(), "must own lock"); | |
| 431 | |
| 432 task->set_next(NULL); | |
| 433 | |
| 434 if (_last == NULL) { | |
| 435 // The compile queue is empty. | |
| 436 assert(_first == NULL, "queue is empty"); | |
| 437 _first = task; | |
| 438 _last = task; | |
| 439 } else { | |
| 440 // Append the task to the queue. | |
| 441 assert(_last->next() == NULL, "not last"); | |
| 442 _last->set_next(task); | |
| 443 _last = task; | |
| 444 } | |
| 445 | |
| 446 // Mark the method as being in the compile queue. | |
| 447 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); | |
| 448 | |
| 449 if (CIPrintCompileQueue) { | |
| 450 print(); | |
| 451 } | |
| 452 | |
| 453 if (LogCompilation && xtty != NULL) { | |
| 454 task->log_task_queued(); | |
| 455 } | |
| 456 | |
| 457 // Notify CompilerThreads that a task is available. | |
| 458 lock()->notify(); | |
| 459 } | |
| 460 | |
| 461 | |
| 462 // ------------------------------------------------------------------ | |
| 463 // CompileQueue::get | |
| 464 // | |
| 465 // Get the next CompileTask from a CompileQueue | |
| 466 CompileTask* CompileQueue::get() { | |
| 467 MutexLocker locker(lock()); | |
| 468 | |
| 469 // Wait for an available CompileTask. | |
| 470 while (_first == NULL) { | |
| 471 // There is no work to be done right now. Wait. | |
| 472 lock()->wait(); | |
| 473 } | |
| 474 | |
| 475 CompileTask* task = _first; | |
| 476 | |
| 477 // Update queue first and last | |
| 478 _first =_first->next(); | |
| 479 if (_first == NULL) { | |
| 480 _last = NULL; | |
| 481 } | |
| 482 | |
|
1454
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
diff
changeset
|
483 // (tw) Immediately set compiling flag. |
|
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
diff
changeset
|
484 JavaThread::current()->as_CompilerThread()->set_compiling(true); |
|
7cf1952ec5fb
Added flag -XX:BootstrapC1X that precompiles Object::<init> and then every method in the compilation queue until it is empty.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1434
diff
changeset
|
485 |
| 0 | 486 return task; |
| 487 | |
| 488 } | |
| 489 | |
| 490 | |
| 491 // ------------------------------------------------------------------ | |
| 492 // CompileQueue::print | |
| 493 void CompileQueue::print() { | |
| 494 tty->print_cr("Contents of %s", name()); | |
| 495 tty->print_cr("----------------------"); | |
| 496 CompileTask* task = _first; | |
| 497 while (task != NULL) { | |
| 498 task->print_line(); | |
| 499 task = task->next(); | |
| 500 } | |
| 501 tty->print_cr("----------------------"); | |
| 502 } | |
| 503 | |
| 504 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
| 505 | |
| 506 _current_method[0] = '\0'; | |
| 507 _compile_type = CompileBroker::no_compile; | |
| 508 | |
| 509 if (UsePerfData) { | |
| 510 ResourceMark rm; | |
| 511 | |
| 512 // create the thread instance name space string - don't create an | |
| 513 // instance subspace if instance is -1 - keeps the adapterThread | |
| 514 // counters from having a ".0" namespace. | |
| 515 const char* thread_i = (instance == -1) ? thread_name : | |
| 516 PerfDataManager::name_space(thread_name, instance); | |
| 517 | |
| 518 | |
| 519 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
| 520 _perf_current_method = | |
| 521 PerfDataManager::create_string_variable(SUN_CI, name, | |
| 522 cmname_buffer_length, | |
| 523 _current_method, CHECK); | |
| 524 | |
| 525 name = PerfDataManager::counter_name(thread_i, "type"); | |
| 526 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
| 527 PerfData::U_None, | |
| 528 (jlong)_compile_type, | |
| 529 CHECK); | |
| 530 | |
| 531 name = PerfDataManager::counter_name(thread_i, "time"); | |
| 532 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
| 533 PerfData::U_Ticks, CHECK); | |
| 534 | |
| 535 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
| 536 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
| 537 PerfData::U_Events, CHECK); | |
| 538 } | |
| 539 } | |
| 540 | |
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541 // Bootstrap the C1X compiler. Compiles all methods until compile queue is empty and no compilation is active. |
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542 void CompileBroker::bootstrap_c1x() { |
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543 HandleMark hm; |
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544 Thread* THREAD = Thread::current(); |
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545 tty->print_cr("Bootstrapping C1X..."); |
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546 |
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547 C1XCompiler* compiler = C1XCompiler::instance(); |
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548 if (compiler == NULL) fatal("must use flag -XX:+UseC1X"); |
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549 |
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550 jlong start = os::javaTimeMillis(); |
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551 |
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552 instanceKlass* klass = (instanceKlass*)SystemDictionary::Object_klass()->klass_part(); |
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553 methodOop method = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); |
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554 CompileBroker::compile_method(method, -1, method, 0, "initial compile of object initializer", THREAD); |
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555 if (HAS_PENDING_EXCEPTION) { |
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556 CLEAR_PENDING_EXCEPTION; |
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557 fatal("error inserting object initializer into compile queue"); |
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558 } |
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559 |
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560 int z = 0; |
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561 while (true) { |
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562 { |
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563 HandleMark hm; |
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564 ResourceMark rm; |
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565 MutexLocker locker(_method_queue->lock(), Thread::current()); |
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566 if (_method_queue->is_empty()) { |
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567 MutexLocker mu(Threads_lock); // grab Threads_lock |
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568 JavaThread* current = Threads::first(); |
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569 bool compiling = false; |
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570 while (current != NULL) { |
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571 if (current->is_Compiler_thread()) { |
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572 CompilerThread* comp_thread = current->as_CompilerThread(); |
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573 if (comp_thread->is_compiling()) { |
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574 if (TraceC1X >= 4) { |
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575 tty->print_cr("Compile queue empty, but following thread is still compiling:"); |
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576 comp_thread->print(); |
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577 } |
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578 compiling = true; |
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579 } |
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580 } |
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581 current = current->next(); |
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582 } |
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583 if (!compiling) { |
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584 break; |
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585 } |
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586 } |
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587 if (TraceC1X >= 4) { |
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588 _method_queue->print(); |
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589 } |
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590 } |
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591 |
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592 { |
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593 ThreadToNativeFromVM trans(JavaThread::current()); |
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594 usleep(1000); |
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595 } |
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596 ++z; |
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597 } |
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598 |
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599 // Do a full garbage collection. |
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600 Universe::heap()->collect(GCCause::_java_lang_system_gc); |
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601 |
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602 jlong diff = os::javaTimeMillis() - start; |
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603 tty->print_cr("Finished bootstrap in %d ms", diff); |
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604 if (CITime) CompileBroker::print_times(); |
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605 tty->print_cr("==========================================================================="); |
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606 } |
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607 |
| 0 | 608 |
| 609 // ------------------------------------------------------------------ | |
| 610 // CompileBroker::compilation_init | |
| 611 // | |
| 612 // Initialize the Compilation object | |
| 613 void CompileBroker::compilation_init() { | |
| 614 _last_method_compiled[0] = '\0'; | |
| 615 | |
| 616 // Set the interface to the current compiler(s). | |
| 617 #ifdef COMPILER1 | |
|
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618 if (UseC1X) { |
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619 _compilers[0] = new C1XCompiler(); |
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620 } else { |
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621 _compilers[0] = new Compiler(); |
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622 } |
| 0 | 623 #ifndef COMPILER2 |
| 624 _compilers[1] = _compilers[0]; | |
| 625 #endif | |
| 626 #endif // COMPILER1 | |
| 627 | |
| 628 #ifdef COMPILER2 | |
| 629 _compilers[1] = new C2Compiler(); | |
| 630 #ifndef COMPILER1 | |
| 631 _compilers[0] = _compilers[1]; | |
| 632 #endif | |
| 633 #endif // COMPILER2 | |
| 634 | |
| 635 // Initialize the CompileTask free list | |
| 636 _task_free_list = NULL; | |
| 637 | |
| 638 // Start the CompilerThreads | |
| 639 init_compiler_threads(compiler_count()); | |
| 640 | |
| 641 | |
| 642 // totalTime performance counter is always created as it is required | |
| 643 // by the implementation of java.lang.management.CompilationMBean. | |
| 644 { | |
| 645 EXCEPTION_MARK; | |
| 646 _perf_total_compilation = | |
| 647 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
| 648 PerfData::U_Ticks, CHECK); | |
| 649 } | |
| 650 | |
| 651 | |
| 652 if (UsePerfData) { | |
| 653 | |
| 654 EXCEPTION_MARK; | |
| 655 | |
| 656 // create the jvmstat performance counters | |
| 657 _perf_osr_compilation = | |
| 658 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
| 659 PerfData::U_Ticks, CHECK); | |
| 660 | |
| 661 _perf_standard_compilation = | |
| 662 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
| 663 PerfData::U_Ticks, CHECK); | |
| 664 | |
| 665 _perf_total_bailout_count = | |
| 666 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
| 667 PerfData::U_Events, CHECK); | |
| 668 | |
| 669 _perf_total_invalidated_count = | |
| 670 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
| 671 PerfData::U_Events, CHECK); | |
| 672 | |
| 673 _perf_total_compile_count = | |
| 674 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
| 675 PerfData::U_Events, CHECK); | |
| 676 _perf_total_osr_compile_count = | |
| 677 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
| 678 PerfData::U_Events, CHECK); | |
| 679 | |
| 680 _perf_total_standard_compile_count = | |
| 681 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
| 682 PerfData::U_Events, CHECK); | |
| 683 | |
| 684 _perf_sum_osr_bytes_compiled = | |
| 685 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
| 686 PerfData::U_Bytes, CHECK); | |
| 687 | |
| 688 _perf_sum_standard_bytes_compiled = | |
| 689 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
| 690 PerfData::U_Bytes, CHECK); | |
| 691 | |
| 692 _perf_sum_nmethod_size = | |
| 693 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
| 694 PerfData::U_Bytes, CHECK); | |
| 695 | |
| 696 _perf_sum_nmethod_code_size = | |
| 697 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
| 698 PerfData::U_Bytes, CHECK); | |
| 699 | |
| 700 _perf_last_method = | |
| 701 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
| 702 CompilerCounters::cmname_buffer_length, | |
| 703 "", CHECK); | |
| 704 | |
| 705 _perf_last_failed_method = | |
| 706 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
| 707 CompilerCounters::cmname_buffer_length, | |
| 708 "", CHECK); | |
| 709 | |
| 710 _perf_last_invalidated_method = | |
| 711 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
| 712 CompilerCounters::cmname_buffer_length, | |
| 713 "", CHECK); | |
| 714 | |
| 715 _perf_last_compile_type = | |
| 716 PerfDataManager::create_variable(SUN_CI, "lastType", | |
| 717 PerfData::U_None, | |
| 718 (jlong)CompileBroker::no_compile, | |
| 719 CHECK); | |
| 720 | |
| 721 _perf_last_compile_size = | |
| 722 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
| 723 PerfData::U_Bytes, | |
| 724 (jlong)CompileBroker::no_compile, | |
| 725 CHECK); | |
| 726 | |
| 727 | |
| 728 _perf_last_failed_type = | |
| 729 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
| 730 PerfData::U_None, | |
| 731 (jlong)CompileBroker::no_compile, | |
| 732 CHECK); | |
| 733 | |
| 734 _perf_last_invalidated_type = | |
| 735 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
| 736 PerfData::U_None, | |
| 737 (jlong)CompileBroker::no_compile, | |
| 738 CHECK); | |
| 739 } | |
| 740 | |
| 741 _initialized = true; | |
| 742 } | |
| 743 | |
| 744 | |
| 745 | |
| 746 // ------------------------------------------------------------------ | |
| 747 // CompileBroker::make_compiler_thread | |
| 748 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
| 749 CompilerThread* compiler_thread = NULL; | |
| 750 | |
| 751 klassOop k = | |
| 752 SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), | |
| 753 true, CHECK_0); | |
| 754 instanceKlassHandle klass (THREAD, k); | |
| 755 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
| 756 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
| 757 | |
| 758 // Initialize thread_oop to put it into the system threadGroup | |
| 759 Handle thread_group (THREAD, Universe::system_thread_group()); | |
| 760 JavaValue result(T_VOID); | |
| 761 JavaCalls::call_special(&result, thread_oop, | |
| 762 klass, | |
| 763 vmSymbolHandles::object_initializer_name(), | |
| 764 vmSymbolHandles::threadgroup_string_void_signature(), | |
| 765 thread_group, | |
| 766 string, | |
| 767 CHECK_0); | |
| 768 | |
| 769 { | |
| 770 MutexLocker mu(Threads_lock, THREAD); | |
| 771 compiler_thread = new CompilerThread(queue, counters); | |
| 772 // At this point the new CompilerThread data-races with this startup | |
| 773 // thread (which I believe is the primoridal thread and NOT the VM | |
| 774 // thread). This means Java bytecodes being executed at startup can | |
| 775 // queue compile jobs which will run at whatever default priority the | |
| 776 // newly created CompilerThread runs at. | |
| 777 | |
| 778 | |
| 779 // At this point it may be possible that no osthread was created for the | |
| 780 // JavaThread due to lack of memory. We would have to throw an exception | |
| 781 // in that case. However, since this must work and we do not allow | |
| 782 // exceptions anyway, check and abort if this fails. | |
| 783 | |
| 784 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
| 785 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
| 786 "unable to create new native thread"); | |
| 787 } | |
| 788 | |
| 789 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
| 790 | |
| 791 // Note that this only sets the JavaThread _priority field, which by | |
| 792 // definition is limited to Java priorities and not OS priorities. | |
| 793 // The os-priority is set in the CompilerThread startup code itself | |
| 794 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
| 795 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler | |
| 796 // threads never have their OS priority set. The assumption here is to | |
| 797 // enable the Performance group to do flag tuning, figure out a suitable | |
| 798 // CompilerThreadPriority, and then remove this 'if' statement (and | |
| 799 // comment) and unconditionally set the priority. | |
| 800 | |
| 801 // Compiler Threads should be at the highest Priority | |
| 802 if ( CompilerThreadPriority != -1 ) | |
| 803 os::set_native_priority( compiler_thread, CompilerThreadPriority ); | |
| 804 else | |
| 805 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); | |
| 806 | |
| 807 // Note that I cannot call os::set_priority because it expects Java | |
| 808 // priorities and I am *explicitly* using OS priorities so that it's | |
| 809 // possible to set the compiler thread priority higher than any Java | |
| 810 // thread. | |
| 811 | |
| 812 java_lang_Thread::set_daemon(thread_oop()); | |
| 813 | |
| 814 compiler_thread->set_threadObj(thread_oop()); | |
| 815 Threads::add(compiler_thread); | |
| 816 Thread::start(compiler_thread); | |
| 817 } | |
| 818 // Let go of Threads_lock before yielding | |
| 819 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
| 820 | |
| 821 return compiler_thread; | |
| 822 } | |
| 823 | |
| 824 | |
| 825 // ------------------------------------------------------------------ | |
| 826 // CompileBroker::init_compiler_threads | |
| 827 // | |
| 828 // Initialize the compilation queue | |
| 829 void CompileBroker::init_compiler_threads(int compiler_count) { | |
| 830 EXCEPTION_MARK; | |
| 831 | |
| 832 _method_queue = new CompileQueue("MethodQueue", MethodCompileQueue_lock); | |
| 833 _method_threads = | |
| 834 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); | |
| 835 | |
| 836 char name_buffer[256]; | |
| 837 int i; | |
| 838 for (i = 0; i < compiler_count; i++) { | |
| 839 // Create a name for our thread. | |
| 840 sprintf(name_buffer, "CompilerThread%d", i); | |
| 841 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
| 842 | |
| 843 CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK); | |
| 844 _method_threads->append(new_thread); | |
| 845 } | |
| 846 if (UsePerfData) { | |
| 847 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
| 848 compiler_count, CHECK); | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 // ------------------------------------------------------------------ | |
| 853 // CompileBroker::is_idle | |
| 854 bool CompileBroker::is_idle() { | |
| 855 if (!_method_queue->is_empty()) { | |
| 856 return false; | |
| 857 } else { | |
| 858 int num_threads = _method_threads->length(); | |
| 859 for (int i=0; i<num_threads; i++) { | |
| 860 if (_method_threads->at(i)->task() != NULL) { | |
| 861 return false; | |
| 862 } | |
| 863 } | |
| 864 | |
| 865 // No pending or active compilations. | |
| 866 return true; | |
| 867 } | |
| 868 } | |
| 869 | |
| 870 | |
| 871 // ------------------------------------------------------------------ | |
| 872 // CompileBroker::compile_method | |
| 873 // | |
| 874 // Request compilation of a method. | |
| 875 void CompileBroker::compile_method_base(methodHandle method, | |
| 876 int osr_bci, | |
| 877 int comp_level, | |
| 878 methodHandle hot_method, | |
| 879 int hot_count, | |
| 880 const char* comment, | |
| 881 TRAPS) { | |
| 882 // do nothing if compiler thread(s) is not available | |
| 883 if (!_initialized ) { | |
| 884 return; | |
| 885 } | |
| 886 | |
| 887 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
| 888 assert(method->method_holder()->klass_part()->oop_is_instance(), | |
| 889 "sanity check"); | |
| 890 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), | |
| 891 "method holder must be initialized"); | |
| 892 | |
| 893 if (CIPrintRequests) { | |
| 894 tty->print("request: "); | |
| 895 method->print_short_name(tty); | |
| 896 if (osr_bci != InvocationEntryBci) { | |
| 897 tty->print(" osr_bci: %d", osr_bci); | |
| 898 } | |
| 899 tty->print(" comment: %s count: %d", comment, hot_count); | |
| 900 if (!hot_method.is_null()) { | |
| 901 tty->print(" hot: "); | |
| 902 if (hot_method() != method()) { | |
| 903 hot_method->print_short_name(tty); | |
| 904 } else { | |
| 905 tty->print("yes"); | |
| 906 } | |
| 907 } | |
| 908 tty->cr(); | |
| 909 } | |
| 910 | |
| 911 // A request has been made for compilation. Before we do any | |
| 912 // real work, check to see if the method has been compiled | |
| 913 // in the meantime with a definitive result. | |
| 914 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
| 915 return; | |
| 916 } | |
| 917 | |
| 918 // If this method is already in the compile queue, then | |
| 919 // we do not block the current thread. | |
| 920 if (compilation_is_in_queue(method, osr_bci)) { | |
| 921 // We may want to decay our counter a bit here to prevent | |
| 922 // multiple denied requests for compilation. This is an | |
| 923 // open compilation policy issue. Note: The other possibility, | |
| 924 // in the case that this is a blocking compile request, is to have | |
| 925 // all subsequent blocking requesters wait for completion of | |
| 926 // ongoing compiles. Note that in this case we'll need a protocol | |
| 927 // for freeing the associated compile tasks. [Or we could have | |
| 928 // a single static monitor on which all these waiters sleep.] | |
| 929 return; | |
| 930 } | |
| 931 | |
| 932 // Outputs from the following MutexLocker block: | |
| 933 CompileTask* task = NULL; | |
| 934 bool blocking = false; | |
| 935 | |
| 936 // Acquire our lock. | |
| 937 { | |
| 938 MutexLocker locker(_method_queue->lock(), THREAD); | |
|
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939 |
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940 if (Thread::current()->is_Compiler_thread() && CompilerThread::current()->is_compiling() && !BackgroundCompilation) { |
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941 |
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942 TRACE_C1X_1("Recursive compile %s!", method->name_and_sig_as_C_string()); |
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943 method->set_not_compilable(); |
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944 return; |
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945 } |
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946 |
| 0 | 947 // Make sure the method has not slipped into the queues since |
| 948 // last we checked; note that those checks were "fast bail-outs". | |
| 949 // Here we need to be more careful, see 14012000 below. | |
| 950 if (compilation_is_in_queue(method, osr_bci)) { | |
| 951 return; | |
| 952 } | |
| 953 | |
| 954 // We need to check again to see if the compilation has | |
| 955 // completed. A previous compilation may have registered | |
| 956 // some result. | |
| 957 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
| 958 return; | |
| 959 } | |
| 960 | |
| 961 // We now know that this compilation is not pending, complete, | |
| 962 // or prohibited. Assign a compile_id to this compilation | |
| 963 // and check to see if it is in our [Start..Stop) range. | |
| 964 uint compile_id = assign_compile_id(method, osr_bci); | |
| 965 if (compile_id == 0) { | |
| 966 // The compilation falls outside the allowed range. | |
| 967 return; | |
| 968 } | |
| 969 | |
| 970 // Should this thread wait for completion of the compile? | |
| 971 blocking = is_compile_blocking(method, osr_bci); | |
| 972 | |
| 973 // We will enter the compilation in the queue. | |
| 974 // 14012000: Note that this sets the queued_for_compile bits in | |
| 975 // the target method. We can now reason that a method cannot be | |
| 976 // queued for compilation more than once, as follows: | |
| 977 // Before a thread queues a task for compilation, it first acquires | |
| 978 // the compile queue lock, then checks if the method's queued bits | |
| 979 // are set or it has already been compiled. Thus there can not be two | |
| 980 // instances of a compilation task for the same method on the | |
| 981 // compilation queue. Consider now the case where the compilation | |
| 982 // thread has already removed a task for that method from the queue | |
| 983 // and is in the midst of compiling it. In this case, the | |
| 984 // queued_for_compile bits must be set in the method (and these | |
| 985 // will be visible to the current thread, since the bits were set | |
| 986 // under protection of the compile queue lock, which we hold now. | |
| 987 // When the compilation completes, the compiler thread first sets | |
| 988 // the compilation result and then clears the queued_for_compile | |
| 989 // bits. Neither of these actions are protected by a barrier (or done | |
| 990 // under the protection of a lock), so the only guarantee we have | |
| 991 // (on machines with TSO (Total Store Order)) is that these values | |
| 992 // will update in that order. As a result, the only combinations of | |
| 993 // these bits that the current thread will see are, in temporal order: | |
| 994 // <RESULT, QUEUE> : | |
| 995 // <0, 1> : in compile queue, but not yet compiled | |
| 996 // <1, 1> : compiled but queue bit not cleared | |
| 997 // <1, 0> : compiled and queue bit cleared | |
| 998 // Because we first check the queue bits then check the result bits, | |
| 999 // we are assured that we cannot introduce a duplicate task. | |
| 1000 // Note that if we did the tests in the reverse order (i.e. check | |
| 1001 // result then check queued bit), we could get the result bit before | |
| 1002 // the compilation completed, and the queue bit after the compilation | |
| 1003 // completed, and end up introducing a "duplicate" (redundant) task. | |
| 1004 // In that case, the compiler thread should first check if a method | |
| 1005 // has already been compiled before trying to compile it. | |
| 1006 // NOTE: in the event that there are multiple compiler threads and | |
| 1007 // there is de-optimization/recompilation, things will get hairy, | |
| 1008 // and in that case it's best to protect both the testing (here) of | |
| 1009 // these bits, and their updating (here and elsewhere) under a | |
| 1010 // common lock. | |
| 1011 task = create_compile_task(_method_queue, | |
| 1012 compile_id, method, | |
| 1013 osr_bci, comp_level, | |
| 1014 hot_method, hot_count, comment, | |
| 1015 blocking); | |
| 1016 } | |
| 1017 | |
| 1018 if (blocking) { | |
| 1019 wait_for_completion(task); | |
| 1020 } | |
| 1021 } | |
| 1022 | |
| 1023 | |
| 1024 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
| 1025 methodHandle hot_method, int hot_count, | |
| 1026 const char* comment, TRAPS) { | |
| 1027 // make sure arguments make sense | |
| 1028 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); | |
| 1029 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); | |
| 1030 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
| 1031 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); | |
| 1032 | |
| 1033 int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci); | |
| 1034 | |
| 1035 #ifdef TIERED | |
| 1036 if (TieredCompilation && StressTieredRuntime) { | |
| 1037 static int flipper = 0; | |
| 1038 if (is_even(flipper++)) { | |
| 1039 comp_level = CompLevel_fast_compile; | |
| 1040 } else { | |
| 1041 comp_level = CompLevel_full_optimization; | |
| 1042 } | |
| 1043 } | |
| 1044 #ifdef SPARC | |
| 1045 // QQQ FIX ME | |
| 1046 // C2 only returns long results in G1 and c1 doesn't understand so disallow c2 | |
| 1047 // compiles of long results | |
| 1048 if (TieredCompilation && method()->result_type() == T_LONG) { | |
| 1049 comp_level = CompLevel_fast_compile; | |
| 1050 } | |
| 1051 #endif // SPARC | |
| 1052 #endif // TIERED | |
| 1053 | |
| 1054 // return quickly if possible | |
| 1055 | |
| 1056 // lock, make sure that the compilation | |
| 1057 // isn't prohibited in a straightforward way. | |
| 1058 | |
| 1059 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
| 1060 return NULL; | |
| 1061 } | |
| 1062 | |
| 1063 if (osr_bci == InvocationEntryBci) { | |
| 1064 // standard compilation | |
| 1065 nmethod* method_code = method->code(); | |
| 1066 if (method_code != NULL | |
| 1067 #ifdef TIERED | |
| 1068 && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile ) | |
| 1069 #endif // TIERED | |
| 1070 ) { | |
| 1071 return method_code; | |
| 1072 } | |
| 1073 if (method->is_not_compilable(comp_level)) return NULL; | |
| 1202 | 1074 |
|
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1075 if (UseCodeCacheFlushing) { |
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1076 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1077 if (saved != NULL) { |
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1078 method->set_code(method, saved); |
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1079 return saved; |
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1080 } |
| 1202 | 1081 } |
| 1082 | |
| 0 | 1083 } else { |
| 1084 // osr compilation | |
| 1085 #ifndef TIERED | |
| 1086 // seems like an assert of dubious value | |
| 1087 assert(comp_level == CompLevel_full_optimization, | |
| 1088 "all OSR compiles are assumed to be at a single compilation lavel"); | |
| 1089 #endif // TIERED | |
| 1090 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci); | |
| 1091 if (nm != NULL) return nm; | |
| 1092 if (method->is_not_osr_compilable()) return NULL; | |
| 1093 } | |
| 1094 | |
| 1095 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
| 1096 // some prerequisites that are compiler specific | |
| 1097 if (compiler(comp_level)->is_c2()) { | |
| 1098 method->constants()->resolve_string_constants(CHECK_0); | |
| 1099 // Resolve all classes seen in the signature of the method | |
| 1100 // we are compiling. | |
| 1101 methodOopDesc::load_signature_classes(method, CHECK_0); | |
| 1102 } | |
| 1103 | |
| 1104 // If the method is native, do the lookup in the thread requesting | |
| 1105 // the compilation. Native lookups can load code, which is not | |
| 1106 // permitted during compilation. | |
| 1107 // | |
| 1108 // Note: A native method implies non-osr compilation which is | |
| 1109 // checked with an assertion at the entry of this method. | |
| 1110 if (method->is_native()) { | |
| 1111 bool in_base_library; | |
| 1112 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
| 1113 if (HAS_PENDING_EXCEPTION) { | |
| 1114 // In case of an exception looking up the method, we just forget | |
| 1115 // about it. The interpreter will kick-in and throw the exception. | |
| 1116 method->set_not_compilable(); // implies is_not_osr_compilable() | |
| 1117 CLEAR_PENDING_EXCEPTION; | |
| 1118 return NULL; | |
| 1119 } | |
| 1120 assert(method->has_native_function(), "must have native code by now"); | |
| 1121 } | |
| 1122 | |
| 1123 // RedefineClasses() has replaced this method; just return | |
| 1124 if (method->is_old()) { | |
| 1125 return NULL; | |
| 1126 } | |
| 1127 | |
| 1128 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
| 1129 // a lock the compiling thread can not acquire. Prefetch it here. | |
| 1130 if (JvmtiExport::should_post_compiled_method_load()) { | |
| 1131 method->jmethod_id(); | |
| 1132 } | |
| 1133 | |
| 1202 | 1134 // If the compiler is shut off due to code cache flushing or otherwise, |
| 1135 // fail out now so blocking compiles dont hang the java thread | |
| 1136 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
| 1137 method->invocation_counter()->decay(); | |
| 1138 method->backedge_counter()->decay(); | |
| 1139 return NULL; | |
| 1140 } | |
| 1141 | |
| 0 | 1142 // do the compilation |
| 1143 if (method->is_native()) { | |
| 1144 if (!PreferInterpreterNativeStubs) { | |
| 1145 (void) AdapterHandlerLibrary::create_native_wrapper(method); | |
| 1146 } else { | |
| 1147 return NULL; | |
| 1148 } | |
| 1149 } else { | |
| 1150 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); | |
| 1151 } | |
| 1152 | |
| 1153 // return requested nmethod | |
| 1154 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci); | |
| 1155 } | |
| 1156 | |
| 1157 | |
| 1158 // ------------------------------------------------------------------ | |
| 1159 // CompileBroker::compilation_is_complete | |
| 1160 // | |
| 1161 // See if compilation of this method is already complete. | |
| 1162 bool CompileBroker::compilation_is_complete(methodHandle method, | |
| 1163 int osr_bci, | |
| 1164 int comp_level) { | |
| 1165 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1166 if (is_osr) { | |
| 1167 if (method->is_not_osr_compilable()) { | |
| 1168 return true; | |
| 1169 } else { | |
| 1170 nmethod* result = method->lookup_osr_nmethod_for(osr_bci); | |
| 1171 return (result != NULL); | |
| 1172 } | |
| 1173 } else { | |
| 1174 if (method->is_not_compilable(comp_level)) { | |
| 1175 return true; | |
| 1176 } else { | |
| 1177 nmethod* result = method->code(); | |
| 1178 if (result == NULL) return false; | |
| 1179 #ifdef TIERED | |
| 1180 if (comp_level == CompLevel_fast_compile) { | |
| 1181 // At worst the code is from c1 | |
| 1182 return true; | |
| 1183 } | |
| 1184 // comp level must be full opt | |
| 1185 return result->is_compiled_by_c2(); | |
| 1186 #endif // TIERED | |
| 1187 return true; | |
| 1188 } | |
| 1189 } | |
| 1190 } | |
| 1191 | |
| 1192 | |
| 1193 // ------------------------------------------------------------------ | |
| 1194 // CompileBroker::compilation_is_in_queue | |
| 1195 // | |
| 1196 // See if this compilation is already requested. | |
| 1197 // | |
| 1198 // Implementation note: there is only a single "is in queue" bit | |
| 1199 // for each method. This means that the check below is overly | |
| 1200 // conservative in the sense that an osr compilation in the queue | |
| 1201 // will block a normal compilation from entering the queue (and vice | |
| 1202 // versa). This can be remedied by a full queue search to disambiguate | |
| 1203 // cases. If it is deemed profitible, this may be done. | |
| 1204 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
| 1205 int osr_bci) { | |
| 1206 return method->queued_for_compilation(); | |
| 1207 } | |
| 1208 | |
| 1209 | |
| 1210 // ------------------------------------------------------------------ | |
| 1211 // CompileBroker::compilation_is_prohibited | |
| 1212 // | |
| 1213 // See if this compilation is not allowed. | |
| 1214 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
| 1215 bool is_native = method->is_native(); | |
| 1216 // Some compilers may not support the compilation of natives. | |
| 1217 // QQQ this needs some work ought to only record not compilable at | |
| 1218 // the specified level | |
| 1219 if (is_native && | |
| 1220 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
|
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|
1221 method->set_not_compilable_quietly(); |
| 0 | 1222 return true; |
| 1223 } | |
| 1224 | |
| 1225 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1226 // Some compilers may not support on stack replacement. | |
| 1227 if (is_osr && | |
| 1228 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
| 1229 method->set_not_osr_compilable(); | |
| 1230 return true; | |
| 1231 } | |
| 1232 | |
| 1233 // The method may be explicitly excluded by the user. | |
| 1234 bool quietly; | |
| 1235 if (CompilerOracle::should_exclude(method, quietly)) { | |
| 1236 if (!quietly) { | |
| 1237 // This does not happen quietly... | |
| 1238 ResourceMark rm; | |
| 1239 tty->print("### Excluding %s:%s", | |
| 1240 method->is_native() ? "generation of native wrapper" : "compile", | |
| 1241 (method->is_static() ? " static" : "")); | |
| 1242 method->print_short_name(tty); | |
| 1243 tty->cr(); | |
| 1244 } | |
|
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|
1245 method->set_not_compilable_quietly(); |
| 0 | 1246 } |
| 1247 | |
| 1248 return false; | |
| 1249 } | |
| 1250 | |
| 1251 | |
| 1252 // ------------------------------------------------------------------ | |
| 1253 // CompileBroker::assign_compile_id | |
| 1254 // | |
| 1255 // Assign a serialized id number to this compilation request. If the | |
| 1256 // number falls out of the allowed range, return a 0. OSR | |
| 1257 // compilations may be numbered separately from regular compilations | |
| 1258 // if certain debugging flags are used. | |
| 1259 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
| 1260 assert(_method_queue->lock()->owner() == JavaThread::current(), | |
| 1261 "must hold the compilation queue lock"); | |
| 1262 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1263 assert(!method->is_native(), "no longer compile natives"); | |
| 1264 uint id; | |
| 1265 if (CICountOSR && is_osr) { | |
| 1266 id = ++_osr_compilation_id; | |
| 1267 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
| 1268 return id; | |
| 1269 } | |
| 1270 } else { | |
| 1271 id = ++_compilation_id; | |
| 1272 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
| 1273 return id; | |
| 1274 } | |
| 1275 } | |
| 1276 | |
| 1277 // Method was not in the appropriate compilation range. | |
|
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|
1278 method->set_not_compilable_quietly(); |
| 0 | 1279 return 0; |
| 1280 } | |
| 1281 | |
| 1282 | |
| 1283 // ------------------------------------------------------------------ | |
| 1284 // CompileBroker::is_compile_blocking | |
| 1285 // | |
| 1286 // Should the current thread be blocked until this compilation request | |
| 1287 // has been fulfilled? | |
| 1288 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
| 1289 return !BackgroundCompilation; | |
| 1290 } | |
| 1291 | |
| 1292 | |
| 1293 // ------------------------------------------------------------------ | |
| 1294 // CompileBroker::preload_classes | |
| 1295 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
| 1296 // Move this code over from c1_Compiler.cpp | |
| 1297 ShouldNotReachHere(); | |
| 1298 } | |
| 1299 | |
| 1300 | |
| 1301 // ------------------------------------------------------------------ | |
| 1302 // CompileBroker::create_compile_task | |
| 1303 // | |
| 1304 // Create a CompileTask object representing the current request for | |
| 1305 // compilation. Add this task to the queue. | |
| 1306 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
| 1307 int compile_id, | |
| 1308 methodHandle method, | |
| 1309 int osr_bci, | |
| 1310 int comp_level, | |
| 1311 methodHandle hot_method, | |
| 1312 int hot_count, | |
| 1313 const char* comment, | |
| 1314 bool blocking) { | |
| 1315 CompileTask* new_task = allocate_task(); | |
| 1316 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
| 1317 hot_method, hot_count, comment, | |
| 1318 blocking); | |
| 1319 queue->add(new_task); | |
| 1320 return new_task; | |
| 1321 } | |
| 1322 | |
| 1323 | |
| 1324 // ------------------------------------------------------------------ | |
| 1325 // CompileBroker::allocate_task | |
| 1326 // | |
| 1327 // Allocate a CompileTask, from the free list if possible. | |
| 1328 CompileTask* CompileBroker::allocate_task() { | |
| 1329 MutexLocker locker(CompileTaskAlloc_lock); | |
| 1330 CompileTask* task = NULL; | |
| 1331 if (_task_free_list != NULL) { | |
| 1332 task = _task_free_list; | |
| 1333 _task_free_list = task->next(); | |
| 1334 task->set_next(NULL); | |
| 1335 } else { | |
| 1336 task = new CompileTask(); | |
| 1337 task->set_next(NULL); | |
| 1338 } | |
| 1339 return task; | |
| 1340 } | |
| 1341 | |
| 1342 | |
| 1343 // ------------------------------------------------------------------ | |
| 1344 // CompileBroker::free_task | |
| 1345 // | |
| 1346 // Add a task to the free list. | |
| 1347 void CompileBroker::free_task(CompileTask* task) { | |
| 1348 MutexLocker locker(CompileTaskAlloc_lock); | |
| 1349 task->free(); | |
| 1350 task->set_next(_task_free_list); | |
| 1351 _task_free_list = task; | |
| 1352 } | |
| 1353 | |
| 1354 | |
| 1355 // ------------------------------------------------------------------ | |
| 1356 // CompileBroker::wait_for_completion | |
| 1357 // | |
| 1358 // Wait for the given method CompileTask to complete. | |
| 1359 void CompileBroker::wait_for_completion(CompileTask* task) { | |
| 1360 if (CIPrintCompileQueue) { | |
| 1361 tty->print_cr("BLOCKING FOR COMPILE"); | |
| 1362 } | |
| 1363 | |
| 1364 assert(task->is_blocking(), "can only wait on blocking task"); | |
| 1365 | |
| 1366 JavaThread *thread = JavaThread::current(); | |
| 1367 thread->set_blocked_on_compilation(true); | |
| 1368 | |
| 1369 methodHandle method(thread, | |
| 1370 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1371 { | |
| 1372 MutexLocker waiter(task->lock(), thread); | |
| 1373 | |
| 1374 while (!task->is_complete()) | |
| 1375 task->lock()->wait(); | |
| 1376 } | |
| 1377 // It is harmless to check this status without the lock, because | |
| 1378 // completion is a stable property (until the task object is recycled). | |
| 1379 assert(task->is_complete(), "Compilation should have completed"); | |
| 1380 assert(task->code_handle() == NULL, "must be reset"); | |
| 1381 | |
| 1382 thread->set_blocked_on_compilation(false); | |
| 1383 | |
| 1384 // By convention, the waiter is responsible for recycling a | |
| 1385 // blocking CompileTask. Since there is only one waiter ever | |
| 1386 // waiting on a CompileTask, we know that no one else will | |
| 1387 // be using this CompileTask; we can free it. | |
| 1388 free_task(task); | |
| 1389 } | |
| 1390 | |
| 1391 // ------------------------------------------------------------------ | |
| 1392 // CompileBroker::compiler_thread_loop | |
| 1393 // | |
| 1394 // The main loop run by a CompilerThread. | |
| 1395 void CompileBroker::compiler_thread_loop() { | |
| 1396 CompilerThread* thread = CompilerThread::current(); | |
| 1397 CompileQueue* queue = thread->queue(); | |
| 1398 | |
| 1399 // For the thread that initializes the ciObjectFactory | |
| 1400 // this resource mark holds all the shared objects | |
| 1401 ResourceMark rm; | |
| 1402 | |
| 1403 // First thread to get here will initialize the compiler interface | |
| 1404 | |
| 1405 if (!ciObjectFactory::is_initialized()) { | |
| 1406 ASSERT_IN_VM; | |
| 1407 MutexLocker only_one (CompileThread_lock, thread); | |
| 1408 if (!ciObjectFactory::is_initialized()) { | |
| 1409 ciObjectFactory::initialize(); | |
| 1410 } | |
| 1411 } | |
| 1412 | |
| 1413 // Open a log. | |
| 1414 if (LogCompilation) { | |
| 1415 init_compiler_thread_log(); | |
| 1416 } | |
| 1417 CompileLog* log = thread->log(); | |
| 1418 if (log != NULL) { | |
| 1419 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", | |
| 1420 os::current_thread_id(), | |
| 1421 os::current_process_id()); | |
| 1422 log->stamp(); | |
| 1423 log->end_elem(); | |
| 1424 } | |
| 1425 | |
| 1426 while (true) { | |
| 1427 { | |
|
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Thomas Wuerthinger <wuerthinger@ssw.jku.at>
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|
1428 // Unset compiling flag. |
|
7cf1952ec5fb
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|
1429 thread->set_compiling(false); |
|
7cf1952ec5fb
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parents:
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|
1430 |
| 0 | 1431 // We need this HandleMark to avoid leaking VM handles. |
| 1432 HandleMark hm(thread); | |
| 1202 | 1433 |
| 0 | 1434 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) { |
| 1202 | 1435 // the code cache is really full |
| 1436 handle_full_code_cache(); | |
| 1437 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
| 1438 // Attempt to start cleaning the code cache while there is still a little headroom | |
| 1439 NMethodSweeper::handle_full_code_cache(false); | |
| 0 | 1440 } |
| 1441 | |
| 1442 CompileTask* task = queue->get(); | |
| 1443 | |
| 1444 // Give compiler threads an extra quanta. They tend to be bursty and | |
| 1445 // this helps the compiler to finish up the job. | |
| 1446 if( CompilerThreadHintNoPreempt ) | |
| 1447 os::hint_no_preempt(); | |
| 1448 | |
| 1449 // trace per thread time and compile statistics | |
| 1450 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
| 1451 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
| 1452 | |
| 1453 // Assign the task to the current thread. Mark this compilation | |
| 1454 // thread as active for the profiler. | |
| 1455 CompileTaskWrapper ctw(task); | |
| 1456 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
| 1457 task->set_code_handle(&result_handle); | |
| 1458 methodHandle method(thread, | |
| 1459 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1460 | |
| 1461 // Never compile a method if breakpoints are present in it | |
| 1462 if (method()->number_of_breakpoints() == 0) { | |
| 1463 // Compile the method. | |
| 1202 | 1464 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
| 0 | 1465 #ifdef COMPILER1 |
| 1466 // Allow repeating compilations for the purpose of benchmarking | |
| 1467 // compile speed. This is not useful for customers. | |
| 1468 if (CompilationRepeat != 0) { | |
| 1469 int compile_count = CompilationRepeat; | |
| 1470 while (compile_count > 0) { | |
| 1471 invoke_compiler_on_method(task); | |
| 1472 nmethod* nm = method->code(); | |
| 1473 if (nm != NULL) { | |
| 1474 nm->make_zombie(); | |
| 1475 method->clear_code(); | |
| 1476 } | |
| 1477 compile_count--; | |
| 1478 } | |
| 1479 } | |
| 1480 #endif /* COMPILER1 */ | |
| 1481 invoke_compiler_on_method(task); | |
| 1482 } else { | |
| 1483 // After compilation is disabled, remove remaining methods from queue | |
| 1484 method->clear_queued_for_compilation(); | |
| 1485 } | |
| 1486 } | |
| 1487 } | |
| 1488 } | |
| 1489 } | |
| 1490 | |
| 1491 | |
| 1492 // ------------------------------------------------------------------ | |
| 1493 // CompileBroker::init_compiler_thread_log | |
| 1494 // | |
| 1495 // Set up state required by +LogCompilation. | |
| 1496 void CompileBroker::init_compiler_thread_log() { | |
| 1497 CompilerThread* thread = CompilerThread::current(); | |
| 1498 char fileBuf[4*K]; | |
| 1499 FILE* fp = NULL; | |
| 1500 char* file = NULL; | |
| 1501 intx thread_id = os::current_thread_id(); | |
| 1502 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
| 1503 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
|
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1504 if (dir == NULL) { |
|
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|
1505 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
|
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|
1506 thread_id, os::current_process_id()); |
|
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|
1507 } else { |
|
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diff
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|
1508 jio_snprintf(fileBuf, sizeof(fileBuf), |
|
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
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diff
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|
1509 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
|
a2ea687fdc7c
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|
1510 os::file_separator(), thread_id, os::current_process_id()); |
|
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|
1511 } |
| 0 | 1512 fp = fopen(fileBuf, "at"); |
| 1513 if (fp != NULL) { | |
| 1514 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); | |
| 1515 strcpy(file, fileBuf); | |
| 1516 break; | |
| 1517 } | |
| 1518 } | |
| 1519 if (fp == NULL) { | |
| 1520 warning("Cannot open log file: %s", fileBuf); | |
| 1521 } else { | |
| 1522 if (LogCompilation && Verbose) | |
| 1523 tty->print_cr("Opening compilation log %s", file); | |
| 1524 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); | |
| 1525 thread->init_log(log); | |
| 1526 | |
| 1527 if (xtty != NULL) { | |
| 1528 ttyLocker ttyl; | |
| 1529 | |
| 1530 // Record any per thread log files | |
| 1531 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
| 1532 } | |
| 1533 } | |
| 1534 } | |
| 1535 | |
| 1536 // ------------------------------------------------------------------ | |
| 1537 // CompileBroker::set_should_block | |
| 1538 // | |
| 1539 // Set _should_block. | |
| 1540 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
| 1541 void CompileBroker::set_should_block() { | |
| 1542 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
| 1543 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
| 1544 #ifndef PRODUCT | |
| 1545 if (PrintCompilation && (Verbose || WizardMode)) | |
| 1546 tty->print_cr("notifying compiler thread pool to block"); | |
| 1547 #endif | |
| 1548 _should_block = true; | |
| 1549 } | |
| 1550 | |
| 1551 // ------------------------------------------------------------------ | |
| 1552 // CompileBroker::maybe_block | |
| 1553 // | |
| 1554 // Call this from the compiler at convenient points, to poll for _should_block. | |
| 1555 void CompileBroker::maybe_block() { | |
| 1556 if (_should_block) { | |
| 1557 #ifndef PRODUCT | |
| 1558 if (PrintCompilation && (Verbose || WizardMode)) | |
| 1559 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
| 1560 #endif | |
| 1561 ThreadInVMfromNative tivfn(JavaThread::current()); | |
| 1562 } | |
| 1563 } | |
| 1564 | |
| 1565 | |
| 1566 // ------------------------------------------------------------------ | |
| 1567 // CompileBroker::invoke_compiler_on_method | |
| 1568 // | |
| 1569 // Compile a method. | |
| 1570 // | |
| 1571 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
| 1572 if (PrintCompilation) { | |
| 1573 ResourceMark rm; | |
|
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|
1574 tty->print("%s: ", compiler(task->comp_level())->name()); |
| 0 | 1575 task->print_line(); |
| 1576 } | |
| 1577 elapsedTimer time; | |
| 1578 | |
| 1579 CompilerThread* thread = CompilerThread::current(); | |
| 1580 ResourceMark rm(thread); | |
| 1581 | |
| 1582 // Common flags. | |
| 1583 uint compile_id = task->compile_id(); | |
| 1584 int osr_bci = task->osr_bci(); | |
| 1585 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1586 bool should_log = (thread->log() != NULL); | |
| 1587 bool should_break = false; | |
| 1588 { | |
| 1589 // create the handle inside it's own block so it can't | |
| 1590 // accidentally be referenced once the thread transitions to | |
| 1591 // native. The NoHandleMark before the transition should catch | |
| 1592 // any cases where this occurs in the future. | |
| 1593 methodHandle method(thread, | |
| 1594 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1595 should_break = check_break_at(method, compile_id, is_osr); | |
| 1596 if (should_log && !CompilerOracle::should_log(method)) { | |
| 1597 should_log = false; | |
| 1598 } | |
| 1599 assert(!method->is_native(), "no longer compile natives"); | |
| 1600 | |
| 1601 // Save information about this method in case of failure. | |
| 1602 set_last_compile(thread, method, is_osr, task->comp_level()); | |
| 1603 | |
| 1604 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
| 1605 } | |
| 1606 | |
| 1607 // Allocate a new set of JNI handles. | |
| 1608 push_jni_handle_block(); | |
| 1609 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); | |
| 1610 int compilable = ciEnv::MethodCompilable; | |
| 1611 { | |
| 1612 int system_dictionary_modification_counter; | |
| 1613 { | |
| 1614 MutexLocker locker(Compile_lock, thread); | |
| 1615 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
| 1616 } | |
| 1617 | |
|
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1618 // (tw) Check if we may do this? |
|
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1619 // NoHandleMark nhm; |
| 0 | 1620 ThreadToNativeFromVM ttn(thread); |
| 1621 | |
| 1622 ciEnv ci_env(task, system_dictionary_modification_counter); | |
| 1623 if (should_break) { | |
| 1624 ci_env.set_break_at_compile(true); | |
| 1625 } | |
| 1626 if (should_log) { | |
| 1627 ci_env.set_log(thread->log()); | |
| 1628 } | |
| 1629 assert(thread->env() == &ci_env, "set by ci_env"); | |
| 1630 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
| 1631 | |
|
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1632 // Cache Jvmti state |
|
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1633 ci_env.cache_jvmti_state(); |
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1634 |
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1635 // Cache DTrace flags |
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1636 ci_env.cache_dtrace_flags(); |
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|
1637 |
| 0 | 1638 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
| 1639 | |
| 1640 TraceTime t1("compilation", &time); | |
| 1641 | |
| 1642 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
| 1643 | |
| 1644 if (!ci_env.failing() && task->code() == NULL) { | |
| 1645 //assert(false, "compiler should always document failure"); | |
| 1646 // The compiler elected, without comment, not to register a result. | |
| 1647 // Do not attempt further compilations of this method. | |
| 1648 ci_env.record_method_not_compilable("compile failed"); | |
| 1649 } | |
| 1650 | |
| 1651 if (ci_env.failing()) { | |
| 1652 // Copy this bit to the enclosing block: | |
| 1653 compilable = ci_env.compilable(); | |
| 1654 if (PrintCompilation) { | |
| 1655 const char* reason = ci_env.failure_reason(); | |
| 1656 if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
| 1657 if (is_highest_tier_compile(ci_env.comp_level())) { | |
| 1658 // Already at highest tier, promote to not compilable. | |
| 1659 compilable = ciEnv::MethodCompilable_never; | |
| 1660 } else { | |
| 1661 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); | |
| 1662 } | |
| 1663 } | |
| 1664 | |
| 1665 if (compilable == ciEnv::MethodCompilable_never) { | |
| 1666 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); | |
| 1667 } else if (compilable == ciEnv::MethodCompilable) { | |
| 1668 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason); | |
| 1669 } | |
| 1670 } | |
| 1671 } else { | |
| 1672 task->mark_success(); | |
| 1673 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
| 1674 } | |
| 1675 } | |
| 1676 pop_jni_handle_block(); | |
| 1677 | |
| 1678 methodHandle method(thread, | |
| 1679 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1680 | |
| 1681 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
| 1682 | |
| 1683 collect_statistics(thread, time, task); | |
| 1684 | |
| 1685 if (compilable == ciEnv::MethodCompilable_never) { | |
| 1686 if (is_osr) { | |
| 1687 method->set_not_osr_compilable(); | |
| 1688 } else { | |
|
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1689 method->set_not_compilable_quietly(); |
| 0 | 1690 } |
| 1691 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
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1692 method->set_not_compilable_quietly(task->comp_level()); |
| 0 | 1693 } |
| 1694 | |
| 1695 // Note that the queued_for_compilation bits are cleared without | |
| 1696 // protection of a mutex. [They were set by the requester thread, | |
| 1697 // when adding the task to the complie queue -- at which time the | |
| 1698 // compile queue lock was held. Subsequently, we acquired the compile | |
| 1699 // queue lock to get this task off the compile queue; thus (to belabour | |
| 1700 // the point somewhat) our clearing of the bits must be occurring | |
| 1701 // only after the setting of the bits. See also 14012000 above. | |
| 1702 method->clear_queued_for_compilation(); | |
| 1703 | |
| 1704 #ifdef ASSERT | |
| 1705 if (CollectedHeap::fired_fake_oom()) { | |
| 1706 // The current compile received a fake OOM during compilation so | |
| 1707 // go ahead and exit the VM since the test apparently succeeded | |
| 1708 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
| 1709 vm_exit(0); | |
| 1710 } | |
| 1711 #endif | |
| 1712 } | |
| 1713 | |
| 1714 | |
| 1715 // ------------------------------------------------------------------ | |
| 1202 | 1716 // CompileBroker::handle_full_code_cache |
| 1717 // | |
| 1718 // The CodeCache is full. Print out warning and disable compilation or | |
| 1719 // try code cache cleaning so compilation can continue later. | |
| 1720 void CompileBroker::handle_full_code_cache() { | |
| 1721 UseInterpreter = true; | |
| 1722 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
| 1723 CompilerThread* thread = CompilerThread::current(); | |
| 1724 CompileLog* log = thread->log(); | |
| 1725 if (log != NULL) { | |
| 1726 log->begin_elem("code_cache_full"); | |
| 1727 log->stamp(); | |
| 1728 log->end_elem(); | |
| 1729 } | |
| 1730 #ifndef PRODUCT | |
| 1731 warning("CodeCache is full. Compiler has been disabled"); | |
| 1732 if (CompileTheWorld || ExitOnFullCodeCache) { | |
| 1733 before_exit(JavaThread::current()); | |
| 1734 exit_globals(); // will delete tty | |
| 1735 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
| 1736 } | |
| 1737 #endif | |
| 1738 if (UseCodeCacheFlushing) { | |
| 1739 NMethodSweeper::handle_full_code_cache(true); | |
| 1740 } else { | |
| 1741 UseCompiler = false; | |
| 1742 AlwaysCompileLoopMethods = false; | |
| 1743 } | |
| 1744 } | |
| 1745 } | |
| 1746 | |
| 1747 // ------------------------------------------------------------------ | |
| 0 | 1748 // CompileBroker::set_last_compile |
| 1749 // | |
| 1750 // Record this compilation for debugging purposes. | |
| 1751 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
| 1752 ResourceMark rm; | |
| 1753 char* method_name = method->name()->as_C_string(); | |
| 1754 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
| 1755 char current_method[CompilerCounters::cmname_buffer_length]; | |
| 1756 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
| 1757 | |
| 1758 if (UsePerfData) { | |
| 1759 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); | |
| 1760 | |
| 1761 size_t s1len = strlen(class_name); | |
| 1762 size_t s2len = strlen(method_name); | |
| 1763 | |
| 1764 // check if we need to truncate the string | |
| 1765 if (s1len + s2len + 2 > maxLen) { | |
| 1766 | |
| 1767 // the strategy is to lop off the leading characters of the | |
| 1768 // class name and the trailing characters of the method name. | |
| 1769 | |
| 1770 if (s2len + 2 > maxLen) { | |
| 1771 // lop of the entire class name string, let snprintf handle | |
| 1772 // truncation of the method name. | |
| 1773 class_name += s1len; // null string | |
| 1774 } | |
| 1775 else { | |
| 1776 // lop off the extra characters from the front of the class name | |
| 1777 class_name += ((s1len + s2len + 2) - maxLen); | |
| 1778 } | |
| 1779 } | |
| 1780 | |
| 1781 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
| 1782 } | |
| 1783 | |
| 1784 if (CICountOSR && is_osr) { | |
| 1785 _last_compile_type = osr_compile; | |
| 1786 } else { | |
| 1787 _last_compile_type = normal_compile; | |
| 1788 } | |
| 1789 _last_compile_level = comp_level; | |
| 1790 | |
| 1791 if (UsePerfData) { | |
| 1792 CompilerCounters* counters = thread->counters(); | |
| 1793 counters->set_current_method(current_method); | |
| 1794 counters->set_compile_type((jlong)_last_compile_type); | |
| 1795 } | |
| 1796 } | |
| 1797 | |
| 1798 | |
| 1799 // ------------------------------------------------------------------ | |
| 1800 // CompileBroker::push_jni_handle_block | |
| 1801 // | |
| 1802 // Push on a new block of JNI handles. | |
| 1803 void CompileBroker::push_jni_handle_block() { | |
| 1804 JavaThread* thread = JavaThread::current(); | |
| 1805 | |
| 1806 // Allocate a new block for JNI handles. | |
| 1807 // Inlined code from jni_PushLocalFrame() | |
| 1808 JNIHandleBlock* java_handles = thread->active_handles(); | |
| 1809 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
| 1810 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
| 1811 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
| 1812 thread->set_active_handles(compile_handles); | |
| 1813 } | |
| 1814 | |
| 1815 | |
| 1816 // ------------------------------------------------------------------ | |
| 1817 // CompileBroker::pop_jni_handle_block | |
| 1818 // | |
| 1819 // Pop off the current block of JNI handles. | |
| 1820 void CompileBroker::pop_jni_handle_block() { | |
| 1821 JavaThread* thread = JavaThread::current(); | |
| 1822 | |
| 1823 // Release our JNI handle block | |
| 1824 JNIHandleBlock* compile_handles = thread->active_handles(); | |
| 1825 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
| 1826 thread->set_active_handles(java_handles); | |
| 1827 compile_handles->set_pop_frame_link(NULL); | |
| 1828 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
| 1829 } | |
| 1830 | |
| 1831 | |
| 1832 // ------------------------------------------------------------------ | |
| 1833 // CompileBroker::check_break_at | |
| 1834 // | |
| 1835 // Should the compilation break at the current compilation. | |
| 1836 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
| 1837 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
| 1838 return true; | |
| 1839 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
| 1840 return true; | |
| 1841 } else { | |
| 1842 return (compile_id == CIBreakAt); | |
| 1843 } | |
| 1844 } | |
| 1845 | |
| 1846 // ------------------------------------------------------------------ | |
| 1847 // CompileBroker::collect_statistics | |
| 1848 // | |
| 1849 // Collect statistics about the compilation. | |
| 1850 | |
| 1851 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
| 1852 bool success = task->is_success(); | |
| 1853 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1854 uint compile_id = task->compile_id(); | |
| 1855 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
| 1856 nmethod* code = task->code(); | |
| 1857 CompilerCounters* counters = thread->counters(); | |
| 1858 | |
| 1859 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
| 1860 MutexLocker locker(CompileStatistics_lock); | |
| 1861 | |
| 1862 // _perf variables are production performance counters which are | |
| 1863 // updated regardless of the setting of the CITime and CITimeEach flags | |
| 1864 // | |
| 1865 if (!success) { | |
| 1866 _total_bailout_count++; | |
| 1867 if (UsePerfData) { | |
| 1868 _perf_last_failed_method->set_value(counters->current_method()); | |
| 1869 _perf_last_failed_type->set_value(counters->compile_type()); | |
| 1870 _perf_total_bailout_count->inc(); | |
| 1871 } | |
| 1872 } else if (code == NULL) { | |
| 1873 if (UsePerfData) { | |
| 1874 _perf_last_invalidated_method->set_value(counters->current_method()); | |
| 1875 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
| 1876 _perf_total_invalidated_count->inc(); | |
| 1877 } | |
| 1878 _total_invalidated_count++; | |
| 1879 } else { | |
| 1880 // Compilation succeeded | |
| 1881 | |
| 1882 // update compilation ticks - used by the implementation of | |
| 1883 // java.lang.management.CompilationMBean | |
| 1884 _perf_total_compilation->inc(time.ticks()); | |
| 1885 | |
| 1886 if (CITime) { | |
| 1887 _t_total_compilation.add(time); | |
| 1888 if (is_osr) { | |
| 1889 _t_osr_compilation.add(time); | |
| 1890 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
| 1891 } else { | |
| 1892 _t_standard_compilation.add(time); | |
| 1893 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
| 1894 } | |
| 1895 } | |
| 1896 | |
| 1897 if (UsePerfData) { | |
| 1898 // save the name of the last method compiled | |
| 1899 _perf_last_method->set_value(counters->current_method()); | |
| 1900 _perf_last_compile_type->set_value(counters->compile_type()); | |
| 1901 _perf_last_compile_size->set_value(method->code_size() + | |
| 1902 task->num_inlined_bytecodes()); | |
| 1903 if (is_osr) { | |
| 1904 _perf_osr_compilation->inc(time.ticks()); | |
| 1905 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
| 1906 } else { | |
| 1907 _perf_standard_compilation->inc(time.ticks()); | |
| 1908 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
| 1909 } | |
| 1910 } | |
| 1911 | |
| 1912 if (CITimeEach) { | |
| 1913 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
| 1914 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
| 1915 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
| 1916 } | |
| 1917 | |
| 1918 // Collect counts of successful compilations | |
| 1919 _sum_nmethod_size += code->total_size(); | |
| 1920 _sum_nmethod_code_size += code->code_size(); | |
| 1921 _total_compile_count++; | |
| 1922 | |
| 1923 if (UsePerfData) { | |
| 1924 _perf_sum_nmethod_size->inc(code->total_size()); | |
| 1925 _perf_sum_nmethod_code_size->inc(code->code_size()); | |
| 1926 _perf_total_compile_count->inc(); | |
| 1927 } | |
| 1928 | |
| 1929 if (is_osr) { | |
| 1930 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
| 1931 _total_osr_compile_count++; | |
| 1932 } else { | |
| 1933 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
| 1934 _total_standard_compile_count++; | |
| 1935 } | |
| 1936 } | |
| 1937 // set the current method for the thread to null | |
| 1938 if (UsePerfData) counters->set_current_method(""); | |
| 1939 } | |
| 1940 | |
| 1941 | |
| 1942 | |
| 1943 void CompileBroker::print_times() { | |
| 1944 tty->cr(); | |
| 1945 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
| 1946 tty->print_cr("------------------------------------------------"); | |
| 1947 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
| 1948 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
| 1949 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
| 1950 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
| 1951 CompileBroker::_t_standard_compilation.seconds(), | |
| 1952 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
| 1953 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 | 1954 |
| 1955 if (compiler(CompLevel_fast_compile)) { | |
| 1956 compiler(CompLevel_fast_compile)->print_timers(); | |
| 1957 if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier)) | |
| 1958 compiler(CompLevel_highest_tier)->print_timers(); | |
| 0 | 1959 } |
| 1960 | |
| 1961 tty->cr(); | |
| 1962 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
| 1963 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
| 1964 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
| 1965 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
| 1966 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
| 1967 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
| 1968 tty->cr(); | |
| 1969 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
| 1970 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
| 1971 } | |
| 1972 | |
| 1973 | |
| 1974 // Debugging output for failure | |
| 1975 void CompileBroker::print_last_compile() { | |
| 1976 if ( _last_compile_level != CompLevel_none && | |
| 1977 compiler(_last_compile_level) != NULL && | |
| 1978 _last_method_compiled != NULL && | |
| 1979 _last_compile_type != no_compile) { | |
| 1980 if (_last_compile_type == osr_compile) { | |
| 1981 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
| 1982 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
| 1983 } else { | |
| 1984 tty->print_cr("Last parse: %d+++(%d) %s", | |
| 1985 _compilation_id, _last_compile_level, _last_method_compiled); | |
| 1986 } | |
| 1987 } | |
| 1988 } | |
| 1989 | |
| 1990 | |
| 1991 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
| 1992 #ifndef PRODUCT | |
| 1993 st->print_cr("Compiler thread printing unimplemented."); | |
| 1994 st->cr(); | |
| 1995 #endif | |
| 1996 } |