Mercurial > hg > graal-compiler
annotate src/share/vm/compiler/compileBroker.cpp @ 2353:1c0cf339481b
7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache
Summary: Use largest_free_block() instead of unallocated_capacity().
Reviewed-by: iveresov, never, ysr
| author | kvn |
|---|---|
| date | Wed, 09 Mar 2011 09:15:16 -0800 |
| parents | 850b2295a494 |
| children | 1927db75dd85 |
| rev | line source |
|---|---|
| 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 |
| 271 void CompileTask::print_compilation(outputStream *st, methodOop method, char* method_name) { | |
| 272 nmethod::print_compilation(st, method_name,/*title*/ NULL, method, | |
| 273 is_blocking(), compile_id(), osr_bci(), comp_level()); | |
| 274 } | |
| 275 | |
| 0 | 276 // ------------------------------------------------------------------ |
| 277 // CompileTask::print_line_on_error | |
| 278 // | |
| 279 // This function is called by fatal error handler when the thread | |
| 280 // causing troubles is a compiler thread. | |
| 281 // | |
| 282 // Do not grab any lock, do not allocate memory. | |
| 283 // | |
| 284 // Otherwise it's the same as CompileTask::print_line() | |
| 285 // | |
| 286 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { | |
| 287 methodOop method = (methodOop)JNIHandles::resolve(_method); | |
| 288 // print compiler name | |
| 289 st->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
| 1783 | 290 char* method_name = NULL; |
| 291 if (method != NULL) { | |
| 292 method_name = method->name_and_sig_as_C_string(buf, buflen); | |
| 0 | 293 } |
| 1783 | 294 print_compilation(st, method, method_name); |
| 0 | 295 } |
| 296 | |
| 297 // ------------------------------------------------------------------ | |
| 298 // CompileTask::print_line | |
| 299 void CompileTask::print_line() { | |
| 300 Thread *thread = Thread::current(); | |
| 301 methodHandle method(thread, | |
| 302 (methodOop)JNIHandles::resolve(method_handle())); | |
| 303 ResourceMark rm(thread); | |
| 304 | |
| 305 ttyLocker ttyl; // keep the following output all in one block | |
| 306 | |
| 307 // print compiler name if requested | |
| 308 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); | |
| 1783 | 309 print_compilation(tty, method(), NULL); |
| 0 | 310 } |
| 311 | |
| 312 | |
| 313 // ------------------------------------------------------------------ | |
| 314 // CompileTask::log_task | |
| 315 void CompileTask::log_task(xmlStream* log) { | |
| 316 Thread* thread = Thread::current(); | |
| 317 methodHandle method(thread, | |
| 318 (methodOop)JNIHandles::resolve(method_handle())); | |
| 319 ResourceMark rm(thread); | |
| 320 | |
| 321 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> | |
| 322 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); | |
| 323 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
| 324 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind | |
| 325 } // else compile_kind='c2c' | |
| 326 if (!method.is_null()) log->method(method); | |
| 327 if (_osr_bci != CompileBroker::standard_entry_bci) { | |
| 328 log->print(" osr_bci='%d'", _osr_bci); | |
| 329 } | |
| 330 if (_comp_level != CompLevel_highest_tier) { | |
| 331 log->print(" level='%d'", _comp_level); | |
| 332 } | |
| 333 if (_is_blocking) { | |
| 334 log->print(" blocking='1'"); | |
| 335 } | |
| 336 log->stamp(); | |
| 337 } | |
| 338 | |
| 339 | |
| 340 // ------------------------------------------------------------------ | |
| 341 // CompileTask::log_task_queued | |
| 342 void CompileTask::log_task_queued() { | |
| 343 Thread* thread = Thread::current(); | |
| 344 ttyLocker ttyl; | |
| 345 ResourceMark rm(thread); | |
| 346 | |
| 347 xtty->begin_elem("task_queued"); | |
| 348 log_task(xtty); | |
| 349 if (_comment != NULL) { | |
| 350 xtty->print(" comment='%s'", _comment); | |
| 351 } | |
| 352 if (_hot_method != NULL) { | |
| 353 methodHandle hot(thread, | |
| 354 (methodOop)JNIHandles::resolve(_hot_method)); | |
| 355 methodHandle method(thread, | |
| 356 (methodOop)JNIHandles::resolve(_method)); | |
| 357 if (hot() != method()) { | |
| 358 xtty->method(hot); | |
| 359 } | |
| 360 } | |
| 361 if (_hot_count != 0) { | |
| 362 xtty->print(" hot_count='%d'", _hot_count); | |
| 363 } | |
| 364 xtty->end_elem(); | |
| 365 } | |
| 366 | |
| 367 | |
| 368 // ------------------------------------------------------------------ | |
| 369 // CompileTask::log_task_start | |
| 370 void CompileTask::log_task_start(CompileLog* log) { | |
| 371 log->begin_head("task"); | |
| 372 log_task(log); | |
| 373 log->end_head(); | |
| 374 } | |
| 375 | |
| 376 | |
| 377 // ------------------------------------------------------------------ | |
| 378 // CompileTask::log_task_done | |
| 379 void CompileTask::log_task_done(CompileLog* log) { | |
| 380 Thread* thread = Thread::current(); | |
| 381 methodHandle method(thread, | |
| 382 (methodOop)JNIHandles::resolve(method_handle())); | |
| 383 ResourceMark rm(thread); | |
| 384 | |
| 385 // <task_done ... stamp='1.234'> </task> | |
| 386 nmethod* nm = code(); | |
| 387 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", | |
| 1748 | 388 _is_success, nm == NULL ? 0 : nm->content_size(), |
| 0 | 389 method->invocation_count()); |
| 390 int bec = method->backedge_count(); | |
| 391 if (bec != 0) log->print(" backedge_count='%d'", bec); | |
| 392 // Note: "_is_complete" is about to be set, but is not. | |
| 393 if (_num_inlined_bytecodes != 0) { | |
| 394 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); | |
| 395 } | |
| 396 log->stamp(); | |
| 397 log->end_elem(); | |
| 398 log->tail("task"); | |
| 399 log->clear_identities(); // next task will have different CI | |
| 400 if (log->unflushed_count() > 2000) { | |
| 401 log->flush(); | |
| 402 } | |
| 403 log->mark_file_end(); | |
| 404 } | |
| 405 | |
| 406 | |
| 407 | |
| 408 // ------------------------------------------------------------------ | |
| 409 // CompileQueue::add | |
| 410 // | |
| 411 // Add a CompileTask to a CompileQueue | |
| 412 void CompileQueue::add(CompileTask* task) { | |
| 413 assert(lock()->owned_by_self(), "must own lock"); | |
| 414 | |
| 415 task->set_next(NULL); | |
| 1783 | 416 task->set_prev(NULL); |
| 0 | 417 |
| 418 if (_last == NULL) { | |
| 419 // The compile queue is empty. | |
| 420 assert(_first == NULL, "queue is empty"); | |
| 421 _first = task; | |
| 422 _last = task; | |
| 423 } else { | |
| 424 // Append the task to the queue. | |
| 425 assert(_last->next() == NULL, "not last"); | |
| 426 _last->set_next(task); | |
| 1783 | 427 task->set_prev(_last); |
| 0 | 428 _last = task; |
| 429 } | |
| 1783 | 430 ++_size; |
| 0 | 431 |
| 432 // Mark the method as being in the compile queue. | |
| 433 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); | |
| 434 | |
| 435 if (CIPrintCompileQueue) { | |
| 436 print(); | |
| 437 } | |
| 438 | |
| 439 if (LogCompilation && xtty != NULL) { | |
| 440 task->log_task_queued(); | |
| 441 } | |
| 442 | |
| 443 // Notify CompilerThreads that a task is available. | |
| 1783 | 444 lock()->notify_all(); |
| 0 | 445 } |
| 446 | |
| 447 // ------------------------------------------------------------------ | |
| 448 // CompileQueue::get | |
| 449 // | |
| 450 // Get the next CompileTask from a CompileQueue | |
| 451 CompileTask* CompileQueue::get() { | |
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452 NMethodSweeper::possibly_sweep(); |
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453 |
| 0 | 454 MutexLocker locker(lock()); |
| 455 // Wait for an available CompileTask. | |
| 456 while (_first == NULL) { | |
| 457 // There is no work to be done right now. Wait. | |
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458 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { |
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459 // During the emergency sweeping periods, wake up and sweep occasionally |
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460 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); |
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461 if (timedout) { |
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462 MutexUnlocker ul(lock()); |
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463 // When otherwise not busy, run nmethod sweeping |
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464 NMethodSweeper::possibly_sweep(); |
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465 } |
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466 } else { |
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467 // During normal operation no need to wake up on timer |
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468 lock()->wait(); |
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469 } |
| 0 | 470 } |
| 1783 | 471 CompileTask* task = CompilationPolicy::policy()->select_task(this); |
| 472 remove(task); | |
| 473 return task; | |
| 474 } | |
| 0 | 475 |
| 1783 | 476 void CompileQueue::remove(CompileTask* task) |
| 477 { | |
| 478 assert(lock()->owned_by_self(), "must own lock"); | |
| 479 if (task->prev() != NULL) { | |
| 480 task->prev()->set_next(task->next()); | |
| 481 } else { | |
| 482 // max is the first element | |
| 483 assert(task == _first, "Sanity"); | |
| 484 _first = task->next(); | |
| 0 | 485 } |
| 486 | |
| 1783 | 487 if (task->next() != NULL) { |
| 488 task->next()->set_prev(task->prev()); | |
| 489 } else { | |
| 490 // max is the last element | |
| 491 assert(task == _last, "Sanity"); | |
| 492 _last = task->prev(); | |
| 493 } | |
| 494 --_size; | |
| 0 | 495 } |
| 496 | |
| 497 // ------------------------------------------------------------------ | |
| 498 // CompileQueue::print | |
| 499 void CompileQueue::print() { | |
| 500 tty->print_cr("Contents of %s", name()); | |
| 501 tty->print_cr("----------------------"); | |
| 502 CompileTask* task = _first; | |
| 503 while (task != NULL) { | |
| 504 task->print_line(); | |
| 505 task = task->next(); | |
| 506 } | |
| 507 tty->print_cr("----------------------"); | |
| 508 } | |
| 509 | |
| 510 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { | |
| 511 | |
| 512 _current_method[0] = '\0'; | |
| 513 _compile_type = CompileBroker::no_compile; | |
| 514 | |
| 515 if (UsePerfData) { | |
| 516 ResourceMark rm; | |
| 517 | |
| 518 // create the thread instance name space string - don't create an | |
| 519 // instance subspace if instance is -1 - keeps the adapterThread | |
| 520 // counters from having a ".0" namespace. | |
| 521 const char* thread_i = (instance == -1) ? thread_name : | |
| 522 PerfDataManager::name_space(thread_name, instance); | |
| 523 | |
| 524 | |
| 525 char* name = PerfDataManager::counter_name(thread_i, "method"); | |
| 526 _perf_current_method = | |
| 527 PerfDataManager::create_string_variable(SUN_CI, name, | |
| 528 cmname_buffer_length, | |
| 529 _current_method, CHECK); | |
| 530 | |
| 531 name = PerfDataManager::counter_name(thread_i, "type"); | |
| 532 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, | |
| 533 PerfData::U_None, | |
| 534 (jlong)_compile_type, | |
| 535 CHECK); | |
| 536 | |
| 537 name = PerfDataManager::counter_name(thread_i, "time"); | |
| 538 _perf_time = PerfDataManager::create_counter(SUN_CI, name, | |
| 539 PerfData::U_Ticks, CHECK); | |
| 540 | |
| 541 name = PerfDataManager::counter_name(thread_i, "compiles"); | |
| 542 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, | |
| 543 PerfData::U_Events, CHECK); | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 // ------------------------------------------------------------------ | |
| 548 // CompileBroker::compilation_init | |
| 549 // | |
| 550 // Initialize the Compilation object | |
| 551 void CompileBroker::compilation_init() { | |
| 552 _last_method_compiled[0] = '\0'; | |
| 553 | |
| 1970 | 554 #ifndef SHARK |
| 0 | 555 // Set the interface to the current compiler(s). |
| 1783 | 556 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
| 557 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); | |
| 0 | 558 #ifdef COMPILER1 |
| 1783 | 559 if (c1_count > 0) { |
| 560 _compilers[0] = new Compiler(); | |
| 561 } | |
| 0 | 562 #endif // COMPILER1 |
| 563 | |
| 564 #ifdef COMPILER2 | |
| 1783 | 565 if (c2_count > 0) { |
| 566 _compilers[1] = new C2Compiler(); | |
| 567 } | |
| 0 | 568 #endif // COMPILER2 |
| 569 | |
| 1970 | 570 #else // SHARK |
| 571 int c1_count = 0; | |
| 572 int c2_count = 1; | |
| 573 | |
| 574 _compilers[1] = new SharkCompiler(); | |
| 575 #endif // SHARK | |
| 1692 | 576 |
| 0 | 577 // Initialize the CompileTask free list |
| 578 _task_free_list = NULL; | |
| 579 | |
| 580 // Start the CompilerThreads | |
| 1783 | 581 init_compiler_threads(c1_count, c2_count); |
| 0 | 582 // totalTime performance counter is always created as it is required |
| 583 // by the implementation of java.lang.management.CompilationMBean. | |
| 584 { | |
| 585 EXCEPTION_MARK; | |
| 586 _perf_total_compilation = | |
| 587 PerfDataManager::create_counter(JAVA_CI, "totalTime", | |
| 588 PerfData::U_Ticks, CHECK); | |
| 589 } | |
| 590 | |
| 591 | |
| 592 if (UsePerfData) { | |
| 593 | |
| 594 EXCEPTION_MARK; | |
| 595 | |
| 596 // create the jvmstat performance counters | |
| 597 _perf_osr_compilation = | |
| 598 PerfDataManager::create_counter(SUN_CI, "osrTime", | |
| 599 PerfData::U_Ticks, CHECK); | |
| 600 | |
| 601 _perf_standard_compilation = | |
| 602 PerfDataManager::create_counter(SUN_CI, "standardTime", | |
| 603 PerfData::U_Ticks, CHECK); | |
| 604 | |
| 605 _perf_total_bailout_count = | |
| 606 PerfDataManager::create_counter(SUN_CI, "totalBailouts", | |
| 607 PerfData::U_Events, CHECK); | |
| 608 | |
| 609 _perf_total_invalidated_count = | |
| 610 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", | |
| 611 PerfData::U_Events, CHECK); | |
| 612 | |
| 613 _perf_total_compile_count = | |
| 614 PerfDataManager::create_counter(SUN_CI, "totalCompiles", | |
| 615 PerfData::U_Events, CHECK); | |
| 616 _perf_total_osr_compile_count = | |
| 617 PerfDataManager::create_counter(SUN_CI, "osrCompiles", | |
| 618 PerfData::U_Events, CHECK); | |
| 619 | |
| 620 _perf_total_standard_compile_count = | |
| 621 PerfDataManager::create_counter(SUN_CI, "standardCompiles", | |
| 622 PerfData::U_Events, CHECK); | |
| 623 | |
| 624 _perf_sum_osr_bytes_compiled = | |
| 625 PerfDataManager::create_counter(SUN_CI, "osrBytes", | |
| 626 PerfData::U_Bytes, CHECK); | |
| 627 | |
| 628 _perf_sum_standard_bytes_compiled = | |
| 629 PerfDataManager::create_counter(SUN_CI, "standardBytes", | |
| 630 PerfData::U_Bytes, CHECK); | |
| 631 | |
| 632 _perf_sum_nmethod_size = | |
| 633 PerfDataManager::create_counter(SUN_CI, "nmethodSize", | |
| 634 PerfData::U_Bytes, CHECK); | |
| 635 | |
| 636 _perf_sum_nmethod_code_size = | |
| 637 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", | |
| 638 PerfData::U_Bytes, CHECK); | |
| 639 | |
| 640 _perf_last_method = | |
| 641 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", | |
| 642 CompilerCounters::cmname_buffer_length, | |
| 643 "", CHECK); | |
| 644 | |
| 645 _perf_last_failed_method = | |
| 646 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", | |
| 647 CompilerCounters::cmname_buffer_length, | |
| 648 "", CHECK); | |
| 649 | |
| 650 _perf_last_invalidated_method = | |
| 651 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", | |
| 652 CompilerCounters::cmname_buffer_length, | |
| 653 "", CHECK); | |
| 654 | |
| 655 _perf_last_compile_type = | |
| 656 PerfDataManager::create_variable(SUN_CI, "lastType", | |
| 657 PerfData::U_None, | |
| 658 (jlong)CompileBroker::no_compile, | |
| 659 CHECK); | |
| 660 | |
| 661 _perf_last_compile_size = | |
| 662 PerfDataManager::create_variable(SUN_CI, "lastSize", | |
| 663 PerfData::U_Bytes, | |
| 664 (jlong)CompileBroker::no_compile, | |
| 665 CHECK); | |
| 666 | |
| 667 | |
| 668 _perf_last_failed_type = | |
| 669 PerfDataManager::create_variable(SUN_CI, "lastFailedType", | |
| 670 PerfData::U_None, | |
| 671 (jlong)CompileBroker::no_compile, | |
| 672 CHECK); | |
| 673 | |
| 674 _perf_last_invalidated_type = | |
| 675 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", | |
| 676 PerfData::U_None, | |
| 677 (jlong)CompileBroker::no_compile, | |
| 678 CHECK); | |
| 679 } | |
| 680 | |
| 681 _initialized = true; | |
| 682 } | |
| 683 | |
| 684 | |
| 685 | |
| 686 // ------------------------------------------------------------------ | |
| 687 // CompileBroker::make_compiler_thread | |
| 688 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { | |
| 689 CompilerThread* compiler_thread = NULL; | |
| 690 | |
| 691 klassOop k = | |
|
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692 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), |
| 0 | 693 true, CHECK_0); |
| 694 instanceKlassHandle klass (THREAD, k); | |
| 695 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); | |
| 696 Handle string = java_lang_String::create_from_str(name, CHECK_0); | |
| 697 | |
| 698 // Initialize thread_oop to put it into the system threadGroup | |
| 699 Handle thread_group (THREAD, Universe::system_thread_group()); | |
| 700 JavaValue result(T_VOID); | |
| 701 JavaCalls::call_special(&result, thread_oop, | |
| 702 klass, | |
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703 vmSymbols::object_initializer_name(), |
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704 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 705 thread_group, |
| 706 string, | |
| 707 CHECK_0); | |
| 708 | |
| 709 { | |
| 710 MutexLocker mu(Threads_lock, THREAD); | |
| 711 compiler_thread = new CompilerThread(queue, counters); | |
| 712 // At this point the new CompilerThread data-races with this startup | |
| 713 // thread (which I believe is the primoridal thread and NOT the VM | |
| 714 // thread). This means Java bytecodes being executed at startup can | |
| 715 // queue compile jobs which will run at whatever default priority the | |
| 716 // newly created CompilerThread runs at. | |
| 717 | |
| 718 | |
| 719 // At this point it may be possible that no osthread was created for the | |
| 720 // JavaThread due to lack of memory. We would have to throw an exception | |
| 721 // in that case. However, since this must work and we do not allow | |
| 722 // exceptions anyway, check and abort if this fails. | |
| 723 | |
| 724 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ | |
| 725 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
| 726 "unable to create new native thread"); | |
| 727 } | |
| 728 | |
| 729 java_lang_Thread::set_thread(thread_oop(), compiler_thread); | |
| 730 | |
| 731 // Note that this only sets the JavaThread _priority field, which by | |
| 732 // definition is limited to Java priorities and not OS priorities. | |
| 733 // The os-priority is set in the CompilerThread startup code itself | |
| 734 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
| 735 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler | |
| 736 // threads never have their OS priority set. The assumption here is to | |
| 737 // enable the Performance group to do flag tuning, figure out a suitable | |
| 738 // CompilerThreadPriority, and then remove this 'if' statement (and | |
| 739 // comment) and unconditionally set the priority. | |
| 740 | |
| 741 // Compiler Threads should be at the highest Priority | |
| 742 if ( CompilerThreadPriority != -1 ) | |
| 743 os::set_native_priority( compiler_thread, CompilerThreadPriority ); | |
| 744 else | |
| 745 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); | |
| 746 | |
| 747 // Note that I cannot call os::set_priority because it expects Java | |
| 748 // priorities and I am *explicitly* using OS priorities so that it's | |
| 749 // possible to set the compiler thread priority higher than any Java | |
| 750 // thread. | |
| 751 | |
| 752 java_lang_Thread::set_daemon(thread_oop()); | |
| 753 | |
| 754 compiler_thread->set_threadObj(thread_oop()); | |
| 755 Threads::add(compiler_thread); | |
| 756 Thread::start(compiler_thread); | |
| 757 } | |
| 758 // Let go of Threads_lock before yielding | |
| 759 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) | |
| 760 | |
| 761 return compiler_thread; | |
| 762 } | |
| 763 | |
| 764 | |
| 765 // ------------------------------------------------------------------ | |
| 766 // CompileBroker::init_compiler_threads | |
| 767 // | |
| 768 // Initialize the compilation queue | |
| 1783 | 769 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { |
| 0 | 770 EXCEPTION_MARK; |
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771 #ifndef ZERO |
| 1783 | 772 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
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773 #endif // !ZERO |
| 1783 | 774 if (c2_compiler_count > 0) { |
| 775 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); | |
| 776 } | |
| 777 if (c1_compiler_count > 0) { | |
| 778 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); | |
| 779 } | |
| 0 | 780 |
| 1783 | 781 int compiler_count = c1_compiler_count + c2_compiler_count; |
| 782 | |
| 0 | 783 _method_threads = |
| 784 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); | |
| 785 | |
| 786 char name_buffer[256]; | |
| 1783 | 787 for (int i = 0; i < c2_compiler_count; i++) { |
| 0 | 788 // Create a name for our thread. |
| 1783 | 789 sprintf(name_buffer, "C2 CompilerThread%d", i); |
| 0 | 790 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); |
| 1783 | 791 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); |
| 0 | 792 _method_threads->append(new_thread); |
| 793 } | |
| 1783 | 794 |
| 795 for (int i = c2_compiler_count; i < compiler_count; i++) { | |
| 796 // Create a name for our thread. | |
| 797 sprintf(name_buffer, "C1 CompilerThread%d", i); | |
| 798 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); | |
| 799 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); | |
| 800 _method_threads->append(new_thread); | |
| 801 } | |
| 802 | |
| 0 | 803 if (UsePerfData) { |
| 804 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, | |
| 805 compiler_count, CHECK); | |
| 806 } | |
| 807 } | |
| 808 | |
| 809 // ------------------------------------------------------------------ | |
| 810 // CompileBroker::is_idle | |
| 811 bool CompileBroker::is_idle() { | |
| 1783 | 812 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { |
| 813 return false; | |
| 814 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { | |
| 0 | 815 return false; |
| 816 } else { | |
| 817 int num_threads = _method_threads->length(); | |
| 818 for (int i=0; i<num_threads; i++) { | |
| 819 if (_method_threads->at(i)->task() != NULL) { | |
| 820 return false; | |
| 821 } | |
| 822 } | |
| 823 | |
| 824 // No pending or active compilations. | |
| 825 return true; | |
| 826 } | |
| 827 } | |
| 828 | |
| 829 | |
| 830 // ------------------------------------------------------------------ | |
| 831 // CompileBroker::compile_method | |
| 832 // | |
| 833 // Request compilation of a method. | |
| 834 void CompileBroker::compile_method_base(methodHandle method, | |
| 835 int osr_bci, | |
| 836 int comp_level, | |
| 837 methodHandle hot_method, | |
| 838 int hot_count, | |
| 839 const char* comment, | |
| 840 TRAPS) { | |
| 841 // do nothing if compiler thread(s) is not available | |
| 842 if (!_initialized ) { | |
| 843 return; | |
| 844 } | |
| 845 | |
| 846 guarantee(!method->is_abstract(), "cannot compile abstract methods"); | |
| 847 assert(method->method_holder()->klass_part()->oop_is_instance(), | |
| 848 "sanity check"); | |
| 849 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), | |
| 850 "method holder must be initialized"); | |
| 851 | |
| 852 if (CIPrintRequests) { | |
| 853 tty->print("request: "); | |
| 854 method->print_short_name(tty); | |
| 855 if (osr_bci != InvocationEntryBci) { | |
| 856 tty->print(" osr_bci: %d", osr_bci); | |
| 857 } | |
| 858 tty->print(" comment: %s count: %d", comment, hot_count); | |
| 859 if (!hot_method.is_null()) { | |
| 860 tty->print(" hot: "); | |
| 861 if (hot_method() != method()) { | |
| 862 hot_method->print_short_name(tty); | |
| 863 } else { | |
| 864 tty->print("yes"); | |
| 865 } | |
| 866 } | |
| 867 tty->cr(); | |
| 868 } | |
| 869 | |
| 870 // A request has been made for compilation. Before we do any | |
| 871 // real work, check to see if the method has been compiled | |
| 872 // in the meantime with a definitive result. | |
| 873 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
| 874 return; | |
| 875 } | |
| 876 | |
| 1783 | 877 |
| 0 | 878 // If this method is already in the compile queue, then |
| 879 // we do not block the current thread. | |
| 880 if (compilation_is_in_queue(method, osr_bci)) { | |
| 881 // We may want to decay our counter a bit here to prevent | |
| 882 // multiple denied requests for compilation. This is an | |
| 883 // open compilation policy issue. Note: The other possibility, | |
| 884 // in the case that this is a blocking compile request, is to have | |
| 885 // all subsequent blocking requesters wait for completion of | |
| 886 // ongoing compiles. Note that in this case we'll need a protocol | |
| 887 // for freeing the associated compile tasks. [Or we could have | |
| 888 // a single static monitor on which all these waiters sleep.] | |
| 889 return; | |
| 890 } | |
| 891 | |
| 892 // Outputs from the following MutexLocker block: | |
| 893 CompileTask* task = NULL; | |
| 894 bool blocking = false; | |
| 1783 | 895 CompileQueue* queue = compile_queue(comp_level); |
| 0 | 896 |
| 897 // Acquire our lock. | |
| 898 { | |
| 1783 | 899 MutexLocker locker(queue->lock(), THREAD); |
| 0 | 900 |
| 901 // Make sure the method has not slipped into the queues since | |
| 902 // last we checked; note that those checks were "fast bail-outs". | |
| 903 // Here we need to be more careful, see 14012000 below. | |
| 904 if (compilation_is_in_queue(method, osr_bci)) { | |
| 905 return; | |
| 906 } | |
| 907 | |
| 908 // We need to check again to see if the compilation has | |
| 909 // completed. A previous compilation may have registered | |
| 910 // some result. | |
| 911 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
| 912 return; | |
| 913 } | |
| 914 | |
| 915 // We now know that this compilation is not pending, complete, | |
| 916 // or prohibited. Assign a compile_id to this compilation | |
| 917 // and check to see if it is in our [Start..Stop) range. | |
| 918 uint compile_id = assign_compile_id(method, osr_bci); | |
| 919 if (compile_id == 0) { | |
| 920 // The compilation falls outside the allowed range. | |
| 921 return; | |
| 922 } | |
| 923 | |
| 924 // Should this thread wait for completion of the compile? | |
| 925 blocking = is_compile_blocking(method, osr_bci); | |
| 926 | |
| 927 // We will enter the compilation in the queue. | |
| 928 // 14012000: Note that this sets the queued_for_compile bits in | |
| 929 // the target method. We can now reason that a method cannot be | |
| 930 // queued for compilation more than once, as follows: | |
| 931 // Before a thread queues a task for compilation, it first acquires | |
| 932 // the compile queue lock, then checks if the method's queued bits | |
| 933 // are set or it has already been compiled. Thus there can not be two | |
| 934 // instances of a compilation task for the same method on the | |
| 935 // compilation queue. Consider now the case where the compilation | |
| 936 // thread has already removed a task for that method from the queue | |
| 937 // and is in the midst of compiling it. In this case, the | |
| 938 // queued_for_compile bits must be set in the method (and these | |
| 939 // will be visible to the current thread, since the bits were set | |
| 940 // under protection of the compile queue lock, which we hold now. | |
| 941 // When the compilation completes, the compiler thread first sets | |
| 942 // the compilation result and then clears the queued_for_compile | |
| 943 // bits. Neither of these actions are protected by a barrier (or done | |
| 944 // under the protection of a lock), so the only guarantee we have | |
| 945 // (on machines with TSO (Total Store Order)) is that these values | |
| 946 // will update in that order. As a result, the only combinations of | |
| 947 // these bits that the current thread will see are, in temporal order: | |
| 948 // <RESULT, QUEUE> : | |
| 949 // <0, 1> : in compile queue, but not yet compiled | |
| 950 // <1, 1> : compiled but queue bit not cleared | |
| 951 // <1, 0> : compiled and queue bit cleared | |
| 952 // Because we first check the queue bits then check the result bits, | |
| 953 // we are assured that we cannot introduce a duplicate task. | |
| 954 // Note that if we did the tests in the reverse order (i.e. check | |
| 955 // result then check queued bit), we could get the result bit before | |
| 956 // the compilation completed, and the queue bit after the compilation | |
| 957 // completed, and end up introducing a "duplicate" (redundant) task. | |
| 958 // In that case, the compiler thread should first check if a method | |
| 959 // has already been compiled before trying to compile it. | |
| 960 // NOTE: in the event that there are multiple compiler threads and | |
| 961 // there is de-optimization/recompilation, things will get hairy, | |
| 962 // and in that case it's best to protect both the testing (here) of | |
| 963 // these bits, and their updating (here and elsewhere) under a | |
| 964 // common lock. | |
| 1783 | 965 task = create_compile_task(queue, |
| 0 | 966 compile_id, method, |
| 967 osr_bci, comp_level, | |
| 968 hot_method, hot_count, comment, | |
| 969 blocking); | |
| 970 } | |
| 971 | |
| 972 if (blocking) { | |
| 973 wait_for_completion(task); | |
| 974 } | |
| 975 } | |
| 976 | |
| 977 | |
| 978 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, | |
| 1783 | 979 int comp_level, |
| 0 | 980 methodHandle hot_method, int hot_count, |
| 981 const char* comment, TRAPS) { | |
| 982 // make sure arguments make sense | |
| 983 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); | |
| 984 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); | |
| 985 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); | |
| 986 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); | |
| 987 | |
| 1783 | 988 if (!TieredCompilation) { |
| 989 comp_level = CompLevel_highest_tier; | |
| 0 | 990 } |
| 991 | |
| 992 // return quickly if possible | |
| 993 | |
| 994 // lock, make sure that the compilation | |
| 995 // isn't prohibited in a straightforward way. | |
| 996 | |
| 997 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { | |
| 998 return NULL; | |
| 999 } | |
| 1000 | |
| 1001 if (osr_bci == InvocationEntryBci) { | |
| 1002 // standard compilation | |
| 1003 nmethod* method_code = method->code(); | |
| 1783 | 1004 if (method_code != NULL) { |
| 1005 if (compilation_is_complete(method, osr_bci, comp_level)) { | |
| 1006 return method_code; | |
| 1007 } | |
| 0 | 1008 } |
| 1009 if (method->is_not_compilable(comp_level)) return NULL; | |
| 1202 | 1010 |
|
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1011 if (UseCodeCacheFlushing) { |
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1012 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); |
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1013 if (saved != NULL) { |
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1014 method->set_code(method, saved); |
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1015 return saved; |
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1016 } |
| 1202 | 1017 } |
| 1018 | |
| 0 | 1019 } else { |
| 1020 // osr compilation | |
| 1021 #ifndef TIERED | |
| 1022 // seems like an assert of dubious value | |
| 1783 | 1023 assert(comp_level == CompLevel_highest_tier, |
| 0 | 1024 "all OSR compiles are assumed to be at a single compilation lavel"); |
| 1025 #endif // TIERED | |
| 1783 | 1026 // We accept a higher level osr method |
| 1027 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
| 0 | 1028 if (nm != NULL) return nm; |
| 1029 if (method->is_not_osr_compilable()) return NULL; | |
| 1030 } | |
| 1031 | |
| 1032 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); | |
| 1033 // some prerequisites that are compiler specific | |
| 1034 if (compiler(comp_level)->is_c2()) { | |
| 1035 method->constants()->resolve_string_constants(CHECK_0); | |
| 1036 // Resolve all classes seen in the signature of the method | |
| 1037 // we are compiling. | |
| 1038 methodOopDesc::load_signature_classes(method, CHECK_0); | |
| 1039 } | |
| 1040 | |
| 1041 // If the method is native, do the lookup in the thread requesting | |
| 1042 // the compilation. Native lookups can load code, which is not | |
| 1043 // permitted during compilation. | |
| 1044 // | |
| 1045 // Note: A native method implies non-osr compilation which is | |
| 1046 // checked with an assertion at the entry of this method. | |
| 1047 if (method->is_native()) { | |
| 1048 bool in_base_library; | |
| 1049 address adr = NativeLookup::lookup(method, in_base_library, THREAD); | |
| 1050 if (HAS_PENDING_EXCEPTION) { | |
| 1051 // In case of an exception looking up the method, we just forget | |
| 1052 // about it. The interpreter will kick-in and throw the exception. | |
| 1053 method->set_not_compilable(); // implies is_not_osr_compilable() | |
| 1054 CLEAR_PENDING_EXCEPTION; | |
| 1055 return NULL; | |
| 1056 } | |
| 1057 assert(method->has_native_function(), "must have native code by now"); | |
| 1058 } | |
| 1059 | |
| 1060 // RedefineClasses() has replaced this method; just return | |
| 1061 if (method->is_old()) { | |
| 1062 return NULL; | |
| 1063 } | |
| 1064 | |
| 1065 // JVMTI -- post_compile_event requires jmethod_id() that may require | |
| 1066 // a lock the compiling thread can not acquire. Prefetch it here. | |
| 1067 if (JvmtiExport::should_post_compiled_method_load()) { | |
| 1068 method->jmethod_id(); | |
| 1069 } | |
| 1070 | |
| 1202 | 1071 // If the compiler is shut off due to code cache flushing or otherwise, |
| 1072 // fail out now so blocking compiles dont hang the java thread | |
| 1073 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { | |
| 1783 | 1074 CompilationPolicy::policy()->delay_compilation(method()); |
| 1202 | 1075 return NULL; |
| 1076 } | |
| 1077 | |
| 0 | 1078 // do the compilation |
| 1079 if (method->is_native()) { | |
| 1080 if (!PreferInterpreterNativeStubs) { | |
| 1081 (void) AdapterHandlerLibrary::create_native_wrapper(method); | |
| 1082 } else { | |
| 1083 return NULL; | |
| 1084 } | |
| 1085 } else { | |
| 1086 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); | |
| 1087 } | |
| 1088 | |
| 1089 // return requested nmethod | |
| 1783 | 1090 // We accept a higher level osr method |
| 1091 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); | |
| 0 | 1092 } |
| 1093 | |
| 1094 | |
| 1095 // ------------------------------------------------------------------ | |
| 1096 // CompileBroker::compilation_is_complete | |
| 1097 // | |
| 1098 // See if compilation of this method is already complete. | |
| 1099 bool CompileBroker::compilation_is_complete(methodHandle method, | |
| 1100 int osr_bci, | |
| 1101 int comp_level) { | |
| 1102 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1103 if (is_osr) { | |
| 1104 if (method->is_not_osr_compilable()) { | |
| 1105 return true; | |
| 1106 } else { | |
| 1783 | 1107 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
| 0 | 1108 return (result != NULL); |
| 1109 } | |
| 1110 } else { | |
| 1111 if (method->is_not_compilable(comp_level)) { | |
| 1112 return true; | |
| 1113 } else { | |
| 1114 nmethod* result = method->code(); | |
| 1115 if (result == NULL) return false; | |
| 1783 | 1116 return comp_level == result->comp_level(); |
| 0 | 1117 } |
| 1118 } | |
| 1119 } | |
| 1120 | |
| 1121 | |
| 1122 // ------------------------------------------------------------------ | |
| 1123 // CompileBroker::compilation_is_in_queue | |
| 1124 // | |
| 1125 // See if this compilation is already requested. | |
| 1126 // | |
| 1127 // Implementation note: there is only a single "is in queue" bit | |
| 1128 // for each method. This means that the check below is overly | |
| 1129 // conservative in the sense that an osr compilation in the queue | |
| 1130 // will block a normal compilation from entering the queue (and vice | |
| 1131 // versa). This can be remedied by a full queue search to disambiguate | |
| 1132 // cases. If it is deemed profitible, this may be done. | |
| 1133 bool CompileBroker::compilation_is_in_queue(methodHandle method, | |
| 1783 | 1134 int osr_bci) { |
| 0 | 1135 return method->queued_for_compilation(); |
| 1136 } | |
| 1137 | |
| 1138 // ------------------------------------------------------------------ | |
| 1139 // CompileBroker::compilation_is_prohibited | |
| 1140 // | |
| 1141 // See if this compilation is not allowed. | |
| 1142 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { | |
| 1143 bool is_native = method->is_native(); | |
| 1144 // Some compilers may not support the compilation of natives. | |
| 1145 if (is_native && | |
| 1146 (!CICompileNatives || !compiler(comp_level)->supports_native())) { | |
| 1783 | 1147 method->set_not_compilable_quietly(comp_level); |
| 0 | 1148 return true; |
| 1149 } | |
| 1150 | |
| 1151 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1152 // Some compilers may not support on stack replacement. | |
| 1153 if (is_osr && | |
| 1154 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { | |
| 1155 method->set_not_osr_compilable(); | |
| 1156 return true; | |
| 1157 } | |
| 1158 | |
| 1159 // The method may be explicitly excluded by the user. | |
| 1160 bool quietly; | |
| 1161 if (CompilerOracle::should_exclude(method, quietly)) { | |
| 1162 if (!quietly) { | |
| 1163 // This does not happen quietly... | |
| 1164 ResourceMark rm; | |
| 1165 tty->print("### Excluding %s:%s", | |
| 1166 method->is_native() ? "generation of native wrapper" : "compile", | |
| 1167 (method->is_static() ? " static" : "")); | |
| 1168 method->print_short_name(tty); | |
| 1169 tty->cr(); | |
| 1170 } | |
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1171 method->set_not_compilable_quietly(); |
| 0 | 1172 } |
| 1173 | |
| 1174 return false; | |
| 1175 } | |
| 1176 | |
| 1177 | |
| 1178 // ------------------------------------------------------------------ | |
| 1179 // CompileBroker::assign_compile_id | |
| 1180 // | |
| 1181 // Assign a serialized id number to this compilation request. If the | |
| 1182 // number falls out of the allowed range, return a 0. OSR | |
| 1183 // compilations may be numbered separately from regular compilations | |
| 1184 // if certain debugging flags are used. | |
| 1185 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { | |
| 1783 | 1186 assert(MethodCompileQueue_lock->owner() == Thread::current(), |
| 0 | 1187 "must hold the compilation queue lock"); |
| 1188 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1189 assert(!method->is_native(), "no longer compile natives"); | |
| 1190 uint id; | |
| 1191 if (CICountOSR && is_osr) { | |
| 1192 id = ++_osr_compilation_id; | |
| 1193 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { | |
| 1194 return id; | |
| 1195 } | |
| 1196 } else { | |
| 1197 id = ++_compilation_id; | |
| 1198 if ((uint)CIStart <= id && id < (uint)CIStop) { | |
| 1199 return id; | |
| 1200 } | |
| 1201 } | |
| 1202 | |
| 1203 // Method was not in the appropriate compilation range. | |
|
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1204 method->set_not_compilable_quietly(); |
| 0 | 1205 return 0; |
| 1206 } | |
| 1207 | |
| 1208 | |
| 1209 // ------------------------------------------------------------------ | |
| 1210 // CompileBroker::is_compile_blocking | |
| 1211 // | |
| 1212 // Should the current thread be blocked until this compilation request | |
| 1213 // has been fulfilled? | |
| 1214 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { | |
|
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1215 if (!BackgroundCompilation) { |
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1216 Symbol* class_name = method->method_holder()->klass_part()->name(); |
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1217 if (class_name->starts_with("java/lang/ref/Reference", 23)) { |
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1218 // The reference handler thread can dead lock with the GC if compilation is blocking, |
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1219 // so we avoid blocking compiles for anything in the java.lang.ref.Reference class, |
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1220 // including inner classes such as ReferenceHandler. |
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1221 return false; |
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1222 } |
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1223 return true; |
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1224 } |
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1225 return false; |
| 0 | 1226 } |
| 1227 | |
| 1228 | |
| 1229 // ------------------------------------------------------------------ | |
| 1230 // CompileBroker::preload_classes | |
| 1231 void CompileBroker::preload_classes(methodHandle method, TRAPS) { | |
| 1232 // Move this code over from c1_Compiler.cpp | |
| 1233 ShouldNotReachHere(); | |
| 1234 } | |
| 1235 | |
| 1236 | |
| 1237 // ------------------------------------------------------------------ | |
| 1238 // CompileBroker::create_compile_task | |
| 1239 // | |
| 1240 // Create a CompileTask object representing the current request for | |
| 1241 // compilation. Add this task to the queue. | |
| 1242 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, | |
| 1243 int compile_id, | |
| 1244 methodHandle method, | |
| 1245 int osr_bci, | |
| 1246 int comp_level, | |
| 1247 methodHandle hot_method, | |
| 1248 int hot_count, | |
| 1249 const char* comment, | |
| 1250 bool blocking) { | |
| 1251 CompileTask* new_task = allocate_task(); | |
| 1252 new_task->initialize(compile_id, method, osr_bci, comp_level, | |
| 1253 hot_method, hot_count, comment, | |
| 1254 blocking); | |
| 1255 queue->add(new_task); | |
| 1256 return new_task; | |
| 1257 } | |
| 1258 | |
| 1259 | |
| 1260 // ------------------------------------------------------------------ | |
| 1261 // CompileBroker::allocate_task | |
| 1262 // | |
| 1263 // Allocate a CompileTask, from the free list if possible. | |
| 1264 CompileTask* CompileBroker::allocate_task() { | |
| 1265 MutexLocker locker(CompileTaskAlloc_lock); | |
| 1266 CompileTask* task = NULL; | |
| 1267 if (_task_free_list != NULL) { | |
| 1268 task = _task_free_list; | |
| 1269 _task_free_list = task->next(); | |
| 1270 task->set_next(NULL); | |
| 1271 } else { | |
| 1272 task = new CompileTask(); | |
| 1273 task->set_next(NULL); | |
| 1274 } | |
| 1275 return task; | |
| 1276 } | |
| 1277 | |
| 1278 | |
| 1279 // ------------------------------------------------------------------ | |
| 1280 // CompileBroker::free_task | |
| 1281 // | |
| 1282 // Add a task to the free list. | |
| 1283 void CompileBroker::free_task(CompileTask* task) { | |
| 1284 MutexLocker locker(CompileTaskAlloc_lock); | |
| 1285 task->free(); | |
| 1286 task->set_next(_task_free_list); | |
| 1287 _task_free_list = task; | |
| 1288 } | |
| 1289 | |
| 1290 | |
| 1291 // ------------------------------------------------------------------ | |
| 1292 // CompileBroker::wait_for_completion | |
| 1293 // | |
| 1294 // Wait for the given method CompileTask to complete. | |
| 1295 void CompileBroker::wait_for_completion(CompileTask* task) { | |
| 1296 if (CIPrintCompileQueue) { | |
| 1297 tty->print_cr("BLOCKING FOR COMPILE"); | |
| 1298 } | |
| 1299 | |
| 1300 assert(task->is_blocking(), "can only wait on blocking task"); | |
| 1301 | |
| 1302 JavaThread *thread = JavaThread::current(); | |
| 1303 thread->set_blocked_on_compilation(true); | |
| 1304 | |
| 1305 methodHandle method(thread, | |
| 1306 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1307 { | |
| 1308 MutexLocker waiter(task->lock(), thread); | |
| 1309 | |
| 1310 while (!task->is_complete()) | |
| 1311 task->lock()->wait(); | |
| 1312 } | |
| 1313 // It is harmless to check this status without the lock, because | |
| 1314 // completion is a stable property (until the task object is recycled). | |
| 1315 assert(task->is_complete(), "Compilation should have completed"); | |
| 1316 assert(task->code_handle() == NULL, "must be reset"); | |
| 1317 | |
| 1318 thread->set_blocked_on_compilation(false); | |
| 1319 | |
| 1320 // By convention, the waiter is responsible for recycling a | |
| 1321 // blocking CompileTask. Since there is only one waiter ever | |
| 1322 // waiting on a CompileTask, we know that no one else will | |
| 1323 // be using this CompileTask; we can free it. | |
| 1324 free_task(task); | |
| 1325 } | |
| 1326 | |
| 1327 // ------------------------------------------------------------------ | |
| 1328 // CompileBroker::compiler_thread_loop | |
| 1329 // | |
| 1330 // The main loop run by a CompilerThread. | |
| 1331 void CompileBroker::compiler_thread_loop() { | |
| 1332 CompilerThread* thread = CompilerThread::current(); | |
| 1333 CompileQueue* queue = thread->queue(); | |
| 1334 | |
| 1335 // For the thread that initializes the ciObjectFactory | |
| 1336 // this resource mark holds all the shared objects | |
| 1337 ResourceMark rm; | |
| 1338 | |
| 1339 // First thread to get here will initialize the compiler interface | |
| 1340 | |
| 1341 if (!ciObjectFactory::is_initialized()) { | |
| 1342 ASSERT_IN_VM; | |
| 1343 MutexLocker only_one (CompileThread_lock, thread); | |
| 1344 if (!ciObjectFactory::is_initialized()) { | |
| 1345 ciObjectFactory::initialize(); | |
| 1346 } | |
| 1347 } | |
| 1348 | |
| 1349 // Open a log. | |
| 1350 if (LogCompilation) { | |
| 1351 init_compiler_thread_log(); | |
| 1352 } | |
| 1353 CompileLog* log = thread->log(); | |
| 1354 if (log != NULL) { | |
| 1355 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", | |
| 1356 os::current_thread_id(), | |
| 1357 os::current_process_id()); | |
| 1358 log->stamp(); | |
| 1359 log->end_elem(); | |
| 1360 } | |
| 1361 | |
| 1362 while (true) { | |
| 1363 { | |
| 1364 // We need this HandleMark to avoid leaking VM handles. | |
| 1365 HandleMark hm(thread); | |
| 1202 | 1366 |
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1367 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { |
| 1202 | 1368 // the code cache is really full |
| 1369 handle_full_code_cache(); | |
| 1370 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { | |
| 1371 // Attempt to start cleaning the code cache while there is still a little headroom | |
| 1372 NMethodSweeper::handle_full_code_cache(false); | |
| 0 | 1373 } |
| 1374 | |
| 1375 CompileTask* task = queue->get(); | |
| 1376 | |
| 1377 // Give compiler threads an extra quanta. They tend to be bursty and | |
| 1378 // this helps the compiler to finish up the job. | |
| 1379 if( CompilerThreadHintNoPreempt ) | |
| 1380 os::hint_no_preempt(); | |
| 1381 | |
| 1382 // trace per thread time and compile statistics | |
| 1383 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); | |
| 1384 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); | |
| 1385 | |
| 1386 // Assign the task to the current thread. Mark this compilation | |
| 1387 // thread as active for the profiler. | |
| 1388 CompileTaskWrapper ctw(task); | |
| 1389 nmethodLocker result_handle; // (handle for the nmethod produced by this task) | |
| 1390 task->set_code_handle(&result_handle); | |
| 1391 methodHandle method(thread, | |
| 1392 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1393 | |
| 1394 // Never compile a method if breakpoints are present in it | |
| 1395 if (method()->number_of_breakpoints() == 0) { | |
| 1396 // Compile the method. | |
| 1202 | 1397 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
| 0 | 1398 #ifdef COMPILER1 |
| 1399 // Allow repeating compilations for the purpose of benchmarking | |
| 1400 // compile speed. This is not useful for customers. | |
| 1401 if (CompilationRepeat != 0) { | |
| 1402 int compile_count = CompilationRepeat; | |
| 1403 while (compile_count > 0) { | |
| 1404 invoke_compiler_on_method(task); | |
| 1405 nmethod* nm = method->code(); | |
| 1406 if (nm != NULL) { | |
| 1407 nm->make_zombie(); | |
| 1408 method->clear_code(); | |
| 1409 } | |
| 1410 compile_count--; | |
| 1411 } | |
| 1412 } | |
| 1413 #endif /* COMPILER1 */ | |
| 1414 invoke_compiler_on_method(task); | |
| 1415 } else { | |
| 1416 // After compilation is disabled, remove remaining methods from queue | |
| 1417 method->clear_queued_for_compilation(); | |
| 1418 } | |
| 1419 } | |
| 1420 } | |
| 1421 } | |
| 1422 } | |
| 1423 | |
| 1424 | |
| 1425 // ------------------------------------------------------------------ | |
| 1426 // CompileBroker::init_compiler_thread_log | |
| 1427 // | |
| 1428 // Set up state required by +LogCompilation. | |
| 1429 void CompileBroker::init_compiler_thread_log() { | |
| 1430 CompilerThread* thread = CompilerThread::current(); | |
| 1431 char fileBuf[4*K]; | |
| 1432 FILE* fp = NULL; | |
| 1433 char* file = NULL; | |
| 1434 intx thread_id = os::current_thread_id(); | |
| 1435 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { | |
| 1436 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); | |
|
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1437 if (dir == NULL) { |
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1438 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", |
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1439 thread_id, os::current_process_id()); |
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1440 } else { |
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1441 jio_snprintf(fileBuf, sizeof(fileBuf), |
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1442 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
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1443 os::file_separator(), thread_id, os::current_process_id()); |
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1444 } |
| 0 | 1445 fp = fopen(fileBuf, "at"); |
| 1446 if (fp != NULL) { | |
| 1447 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); | |
| 1448 strcpy(file, fileBuf); | |
| 1449 break; | |
| 1450 } | |
| 1451 } | |
| 1452 if (fp == NULL) { | |
| 1453 warning("Cannot open log file: %s", fileBuf); | |
| 1454 } else { | |
| 1455 if (LogCompilation && Verbose) | |
| 1456 tty->print_cr("Opening compilation log %s", file); | |
| 1457 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); | |
| 1458 thread->init_log(log); | |
| 1459 | |
| 1460 if (xtty != NULL) { | |
| 1461 ttyLocker ttyl; | |
| 1462 | |
| 1463 // Record any per thread log files | |
| 1464 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); | |
| 1465 } | |
| 1466 } | |
| 1467 } | |
| 1468 | |
| 1469 // ------------------------------------------------------------------ | |
| 1470 // CompileBroker::set_should_block | |
| 1471 // | |
| 1472 // Set _should_block. | |
| 1473 // Call this from the VM, with Threads_lock held and a safepoint requested. | |
| 1474 void CompileBroker::set_should_block() { | |
| 1475 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
| 1476 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); | |
| 1477 #ifndef PRODUCT | |
| 1478 if (PrintCompilation && (Verbose || WizardMode)) | |
| 1479 tty->print_cr("notifying compiler thread pool to block"); | |
| 1480 #endif | |
| 1481 _should_block = true; | |
| 1482 } | |
| 1483 | |
| 1484 // ------------------------------------------------------------------ | |
| 1485 // CompileBroker::maybe_block | |
| 1486 // | |
| 1487 // Call this from the compiler at convenient points, to poll for _should_block. | |
| 1488 void CompileBroker::maybe_block() { | |
| 1489 if (_should_block) { | |
| 1490 #ifndef PRODUCT | |
| 1491 if (PrintCompilation && (Verbose || WizardMode)) | |
| 1492 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); | |
| 1493 #endif | |
| 1494 ThreadInVMfromNative tivfn(JavaThread::current()); | |
| 1495 } | |
| 1496 } | |
| 1497 | |
| 1498 | |
| 1499 // ------------------------------------------------------------------ | |
| 1500 // CompileBroker::invoke_compiler_on_method | |
| 1501 // | |
| 1502 // Compile a method. | |
| 1503 // | |
| 1504 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { | |
| 1505 if (PrintCompilation) { | |
| 1506 ResourceMark rm; | |
| 1507 task->print_line(); | |
| 1508 } | |
| 1509 elapsedTimer time; | |
| 1510 | |
| 1511 CompilerThread* thread = CompilerThread::current(); | |
| 1512 ResourceMark rm(thread); | |
| 1513 | |
| 1514 // Common flags. | |
| 1515 uint compile_id = task->compile_id(); | |
| 1516 int osr_bci = task->osr_bci(); | |
| 1517 bool is_osr = (osr_bci != standard_entry_bci); | |
| 1518 bool should_log = (thread->log() != NULL); | |
| 1519 bool should_break = false; | |
| 1520 { | |
| 1521 // create the handle inside it's own block so it can't | |
| 1522 // accidentally be referenced once the thread transitions to | |
| 1523 // native. The NoHandleMark before the transition should catch | |
| 1524 // any cases where this occurs in the future. | |
| 1525 methodHandle method(thread, | |
| 1526 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1527 should_break = check_break_at(method, compile_id, is_osr); | |
| 1528 if (should_log && !CompilerOracle::should_log(method)) { | |
| 1529 should_log = false; | |
| 1530 } | |
| 1531 assert(!method->is_native(), "no longer compile natives"); | |
| 1532 | |
| 1533 // Save information about this method in case of failure. | |
| 1534 set_last_compile(thread, method, is_osr, task->comp_level()); | |
| 1535 | |
| 1536 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); | |
| 1537 } | |
| 1538 | |
| 1539 // Allocate a new set of JNI handles. | |
| 1540 push_jni_handle_block(); | |
| 1541 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); | |
| 1542 int compilable = ciEnv::MethodCompilable; | |
| 1543 { | |
| 1544 int system_dictionary_modification_counter; | |
| 1545 { | |
| 1546 MutexLocker locker(Compile_lock, thread); | |
| 1547 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); | |
| 1548 } | |
| 1549 | |
| 1550 NoHandleMark nhm; | |
| 1551 ThreadToNativeFromVM ttn(thread); | |
| 1552 | |
| 1553 ciEnv ci_env(task, system_dictionary_modification_counter); | |
| 1554 if (should_break) { | |
| 1555 ci_env.set_break_at_compile(true); | |
| 1556 } | |
| 1557 if (should_log) { | |
| 1558 ci_env.set_log(thread->log()); | |
| 1559 } | |
| 1560 assert(thread->env() == &ci_env, "set by ci_env"); | |
| 1561 // The thread-env() field is cleared in ~CompileTaskWrapper. | |
| 1562 | |
|
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1563 // Cache Jvmti state |
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1564 ci_env.cache_jvmti_state(); |
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1565 |
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1566 // Cache DTrace flags |
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1567 ci_env.cache_dtrace_flags(); |
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1568 |
| 0 | 1569 ciMethod* target = ci_env.get_method_from_handle(target_handle); |
| 1570 | |
| 1571 TraceTime t1("compilation", &time); | |
| 1572 | |
| 1573 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); | |
| 1574 | |
| 1575 if (!ci_env.failing() && task->code() == NULL) { | |
| 1576 //assert(false, "compiler should always document failure"); | |
| 1577 // The compiler elected, without comment, not to register a result. | |
| 1578 // Do not attempt further compilations of this method. | |
|
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1579 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
| 0 | 1580 } |
| 1581 | |
| 1582 if (ci_env.failing()) { | |
| 1583 // Copy this bit to the enclosing block: | |
| 1584 compilable = ci_env.compilable(); | |
| 1585 if (PrintCompilation) { | |
| 1586 const char* reason = ci_env.failure_reason(); | |
| 1587 if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
| 1588 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); | |
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1589 } else if (compilable == ciEnv::MethodCompilable_never) { |
| 0 | 1590 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); |
| 1591 } else if (compilable == ciEnv::MethodCompilable) { | |
| 1592 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason); | |
| 1593 } | |
| 1594 } | |
| 1595 } else { | |
| 1596 task->mark_success(); | |
| 1597 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); | |
| 1598 } | |
| 1599 } | |
| 1600 pop_jni_handle_block(); | |
| 1601 | |
| 1602 methodHandle method(thread, | |
| 1603 (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1604 | |
| 1605 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); | |
| 1606 | |
| 1607 collect_statistics(thread, time, task); | |
| 1608 | |
| 1609 if (compilable == ciEnv::MethodCompilable_never) { | |
| 1610 if (is_osr) { | |
| 1611 method->set_not_osr_compilable(); | |
| 1612 } else { | |
|
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1613 method->set_not_compilable_quietly(); |
| 0 | 1614 } |
| 1615 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { | |
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1616 method->set_not_compilable_quietly(task->comp_level()); |
| 0 | 1617 } |
| 1618 | |
| 1619 // Note that the queued_for_compilation bits are cleared without | |
| 1620 // protection of a mutex. [They were set by the requester thread, | |
| 1621 // when adding the task to the complie queue -- at which time the | |
| 1622 // compile queue lock was held. Subsequently, we acquired the compile | |
| 1623 // queue lock to get this task off the compile queue; thus (to belabour | |
| 1624 // the point somewhat) our clearing of the bits must be occurring | |
| 1625 // only after the setting of the bits. See also 14012000 above. | |
| 1626 method->clear_queued_for_compilation(); | |
| 1627 | |
| 1628 #ifdef ASSERT | |
| 1629 if (CollectedHeap::fired_fake_oom()) { | |
| 1630 // The current compile received a fake OOM during compilation so | |
| 1631 // go ahead and exit the VM since the test apparently succeeded | |
| 1632 tty->print_cr("*** Shutting down VM after successful fake OOM"); | |
| 1633 vm_exit(0); | |
| 1634 } | |
| 1635 #endif | |
| 1636 } | |
| 1637 | |
| 1638 // ------------------------------------------------------------------ | |
| 1202 | 1639 // CompileBroker::handle_full_code_cache |
| 1640 // | |
| 1641 // The CodeCache is full. Print out warning and disable compilation or | |
| 1642 // try code cache cleaning so compilation can continue later. | |
| 1643 void CompileBroker::handle_full_code_cache() { | |
| 1644 UseInterpreter = true; | |
| 1645 if (UseCompiler || AlwaysCompileLoopMethods ) { | |
|
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1646 if (xtty != NULL) { |
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1647 xtty->begin_elem("code_cache_full"); |
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1648 CodeCache::log_state(xtty); |
|
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1649 xtty->stamp(); |
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1650 xtty->end_elem(); |
| 1202 | 1651 } |
|
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1652 warning("CodeCache is full. Compiler has been disabled."); |
|
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1653 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); |
|
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1654 CodeCache::print_bounds(tty); |
|
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1655 #ifndef PRODUCT |
| 1202 | 1656 if (CompileTheWorld || ExitOnFullCodeCache) { |
| 1657 before_exit(JavaThread::current()); | |
| 1658 exit_globals(); // will delete tty | |
| 1659 vm_direct_exit(CompileTheWorld ? 0 : 1); | |
| 1660 } | |
|
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1661 #endif |
| 1202 | 1662 if (UseCodeCacheFlushing) { |
| 1663 NMethodSweeper::handle_full_code_cache(true); | |
| 1664 } else { | |
| 1665 UseCompiler = false; | |
| 1666 AlwaysCompileLoopMethods = false; | |
| 1667 } | |
| 1668 } | |
| 1669 } | |
| 1670 | |
| 1671 // ------------------------------------------------------------------ | |
| 0 | 1672 // CompileBroker::set_last_compile |
| 1673 // | |
| 1674 // Record this compilation for debugging purposes. | |
| 1675 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { | |
| 1676 ResourceMark rm; | |
| 1677 char* method_name = method->name()->as_C_string(); | |
| 1678 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); | |
| 1679 char current_method[CompilerCounters::cmname_buffer_length]; | |
| 1680 size_t maxLen = CompilerCounters::cmname_buffer_length; | |
| 1681 | |
| 1682 if (UsePerfData) { | |
| 1683 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); | |
| 1684 | |
| 1685 size_t s1len = strlen(class_name); | |
| 1686 size_t s2len = strlen(method_name); | |
| 1687 | |
| 1688 // check if we need to truncate the string | |
| 1689 if (s1len + s2len + 2 > maxLen) { | |
| 1690 | |
| 1691 // the strategy is to lop off the leading characters of the | |
| 1692 // class name and the trailing characters of the method name. | |
| 1693 | |
| 1694 if (s2len + 2 > maxLen) { | |
| 1695 // lop of the entire class name string, let snprintf handle | |
| 1696 // truncation of the method name. | |
| 1697 class_name += s1len; // null string | |
| 1698 } | |
| 1699 else { | |
| 1700 // lop off the extra characters from the front of the class name | |
| 1701 class_name += ((s1len + s2len + 2) - maxLen); | |
| 1702 } | |
| 1703 } | |
| 1704 | |
| 1705 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); | |
| 1706 } | |
| 1707 | |
| 1708 if (CICountOSR && is_osr) { | |
| 1709 _last_compile_type = osr_compile; | |
| 1710 } else { | |
| 1711 _last_compile_type = normal_compile; | |
| 1712 } | |
| 1713 _last_compile_level = comp_level; | |
| 1714 | |
| 1715 if (UsePerfData) { | |
| 1716 CompilerCounters* counters = thread->counters(); | |
| 1717 counters->set_current_method(current_method); | |
| 1718 counters->set_compile_type((jlong)_last_compile_type); | |
| 1719 } | |
| 1720 } | |
| 1721 | |
| 1722 | |
| 1723 // ------------------------------------------------------------------ | |
| 1724 // CompileBroker::push_jni_handle_block | |
| 1725 // | |
| 1726 // Push on a new block of JNI handles. | |
| 1727 void CompileBroker::push_jni_handle_block() { | |
| 1728 JavaThread* thread = JavaThread::current(); | |
| 1729 | |
| 1730 // Allocate a new block for JNI handles. | |
| 1731 // Inlined code from jni_PushLocalFrame() | |
| 1732 JNIHandleBlock* java_handles = thread->active_handles(); | |
| 1733 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); | |
| 1734 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); | |
| 1735 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. | |
| 1736 thread->set_active_handles(compile_handles); | |
| 1737 } | |
| 1738 | |
| 1739 | |
| 1740 // ------------------------------------------------------------------ | |
| 1741 // CompileBroker::pop_jni_handle_block | |
| 1742 // | |
| 1743 // Pop off the current block of JNI handles. | |
| 1744 void CompileBroker::pop_jni_handle_block() { | |
| 1745 JavaThread* thread = JavaThread::current(); | |
| 1746 | |
| 1747 // Release our JNI handle block | |
| 1748 JNIHandleBlock* compile_handles = thread->active_handles(); | |
| 1749 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); | |
| 1750 thread->set_active_handles(java_handles); | |
| 1751 compile_handles->set_pop_frame_link(NULL); | |
| 1752 JNIHandleBlock::release_block(compile_handles, thread); // may block | |
| 1753 } | |
| 1754 | |
| 1755 | |
| 1756 // ------------------------------------------------------------------ | |
| 1757 // CompileBroker::check_break_at | |
| 1758 // | |
| 1759 // Should the compilation break at the current compilation. | |
| 1760 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { | |
| 1761 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { | |
| 1762 return true; | |
| 1763 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling | |
| 1764 return true; | |
| 1765 } else { | |
| 1766 return (compile_id == CIBreakAt); | |
| 1767 } | |
| 1768 } | |
| 1769 | |
| 1770 // ------------------------------------------------------------------ | |
| 1771 // CompileBroker::collect_statistics | |
| 1772 // | |
| 1773 // Collect statistics about the compilation. | |
| 1774 | |
| 1775 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { | |
| 1776 bool success = task->is_success(); | |
| 1777 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); | |
| 1778 uint compile_id = task->compile_id(); | |
| 1779 bool is_osr = (task->osr_bci() != standard_entry_bci); | |
| 1780 nmethod* code = task->code(); | |
| 1781 CompilerCounters* counters = thread->counters(); | |
| 1782 | |
| 1783 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); | |
| 1784 MutexLocker locker(CompileStatistics_lock); | |
| 1785 | |
| 1786 // _perf variables are production performance counters which are | |
| 1787 // updated regardless of the setting of the CITime and CITimeEach flags | |
| 1788 // | |
| 1789 if (!success) { | |
| 1790 _total_bailout_count++; | |
| 1791 if (UsePerfData) { | |
| 1792 _perf_last_failed_method->set_value(counters->current_method()); | |
| 1793 _perf_last_failed_type->set_value(counters->compile_type()); | |
| 1794 _perf_total_bailout_count->inc(); | |
| 1795 } | |
| 1796 } else if (code == NULL) { | |
| 1797 if (UsePerfData) { | |
| 1798 _perf_last_invalidated_method->set_value(counters->current_method()); | |
| 1799 _perf_last_invalidated_type->set_value(counters->compile_type()); | |
| 1800 _perf_total_invalidated_count->inc(); | |
| 1801 } | |
| 1802 _total_invalidated_count++; | |
| 1803 } else { | |
| 1804 // Compilation succeeded | |
| 1805 | |
| 1806 // update compilation ticks - used by the implementation of | |
| 1807 // java.lang.management.CompilationMBean | |
| 1808 _perf_total_compilation->inc(time.ticks()); | |
| 1809 | |
| 1810 if (CITime) { | |
| 1811 _t_total_compilation.add(time); | |
| 1812 if (is_osr) { | |
| 1813 _t_osr_compilation.add(time); | |
| 1814 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
| 1815 } else { | |
| 1816 _t_standard_compilation.add(time); | |
| 1817 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); | |
| 1818 } | |
| 1819 } | |
| 1820 | |
| 1821 if (UsePerfData) { | |
| 1822 // save the name of the last method compiled | |
| 1823 _perf_last_method->set_value(counters->current_method()); | |
| 1824 _perf_last_compile_type->set_value(counters->compile_type()); | |
| 1825 _perf_last_compile_size->set_value(method->code_size() + | |
| 1826 task->num_inlined_bytecodes()); | |
| 1827 if (is_osr) { | |
| 1828 _perf_osr_compilation->inc(time.ticks()); | |
| 1829 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
| 1830 } else { | |
| 1831 _perf_standard_compilation->inc(time.ticks()); | |
| 1832 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); | |
| 1833 } | |
| 1834 } | |
| 1835 | |
| 1836 if (CITimeEach) { | |
| 1837 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); | |
| 1838 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", | |
| 1839 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); | |
| 1840 } | |
| 1841 | |
| 1842 // Collect counts of successful compilations | |
| 1748 | 1843 _sum_nmethod_size += code->total_size(); |
| 1844 _sum_nmethod_code_size += code->insts_size(); | |
| 0 | 1845 _total_compile_count++; |
| 1846 | |
| 1847 if (UsePerfData) { | |
| 1748 | 1848 _perf_sum_nmethod_size->inc( code->total_size()); |
| 1849 _perf_sum_nmethod_code_size->inc(code->insts_size()); | |
| 0 | 1850 _perf_total_compile_count->inc(); |
| 1851 } | |
| 1852 | |
| 1853 if (is_osr) { | |
| 1854 if (UsePerfData) _perf_total_osr_compile_count->inc(); | |
| 1855 _total_osr_compile_count++; | |
| 1856 } else { | |
| 1857 if (UsePerfData) _perf_total_standard_compile_count->inc(); | |
| 1858 _total_standard_compile_count++; | |
| 1859 } | |
| 1860 } | |
| 1861 // set the current method for the thread to null | |
| 1862 if (UsePerfData) counters->set_current_method(""); | |
| 1863 } | |
| 1864 | |
| 1865 | |
| 1866 | |
| 1867 void CompileBroker::print_times() { | |
| 1868 tty->cr(); | |
| 1869 tty->print_cr("Accumulated compiler times (for compiled methods only)"); | |
| 1870 tty->print_cr("------------------------------------------------"); | |
| 1871 //0000000000111111111122222222223333333333444444444455555555556666666666 | |
| 1872 //0123456789012345678901234567890123456789012345678901234567890123456789 | |
| 1873 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); | |
| 1874 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", | |
| 1875 CompileBroker::_t_standard_compilation.seconds(), | |
| 1876 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); | |
| 1877 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 | 1878 |
| 1783 | 1879 if (compiler(CompLevel_simple) != NULL) { |
| 1880 compiler(CompLevel_simple)->print_timers(); | |
| 0 | 1881 } |
| 1783 | 1882 if (compiler(CompLevel_full_optimization) != NULL) { |
| 1883 compiler(CompLevel_full_optimization)->print_timers(); | |
| 1884 } | |
| 0 | 1885 tty->cr(); |
| 1886 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; | |
| 1887 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); | |
| 1888 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); | |
| 1889 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); | |
| 1890 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); | |
| 1891 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); | |
| 1892 tty->cr(); | |
| 1893 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); | |
| 1894 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); | |
| 1895 } | |
| 1896 | |
| 1897 | |
| 1898 // Debugging output for failure | |
| 1899 void CompileBroker::print_last_compile() { | |
| 1900 if ( _last_compile_level != CompLevel_none && | |
| 1901 compiler(_last_compile_level) != NULL && | |
| 1902 _last_method_compiled != NULL && | |
| 1903 _last_compile_type != no_compile) { | |
| 1904 if (_last_compile_type == osr_compile) { | |
| 1905 tty->print_cr("Last parse: [osr]%d+++(%d) %s", | |
| 1906 _osr_compilation_id, _last_compile_level, _last_method_compiled); | |
| 1907 } else { | |
| 1908 tty->print_cr("Last parse: %d+++(%d) %s", | |
| 1909 _compilation_id, _last_compile_level, _last_method_compiled); | |
| 1910 } | |
| 1911 } | |
| 1912 } | |
| 1913 | |
| 1914 | |
| 1915 void CompileBroker::print_compiler_threads_on(outputStream* st) { | |
| 1916 #ifndef PRODUCT | |
| 1917 st->print_cr("Compiler thread printing unimplemented."); | |
| 1918 st->cr(); | |
| 1919 #endif | |
| 1920 } |