| File: | jdk/src/hotspot/share/compiler/compileBroker.cpp |
| Warning: | line 1418, column 13 Value stored to 'adr' during its initialization is never read |
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| 1 | /* |
| 2 | * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved. |
| 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 20 | * or visit www.oracle.com if you need additional information or have any |
| 21 | * questions. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include "precompiled.hpp" |
| 26 | #include "jvm.h" |
| 27 | #include "classfile/javaClasses.hpp" |
| 28 | #include "classfile/symbolTable.hpp" |
| 29 | #include "classfile/vmClasses.hpp" |
| 30 | #include "classfile/vmSymbols.hpp" |
| 31 | #include "code/codeCache.hpp" |
| 32 | #include "code/codeHeapState.hpp" |
| 33 | #include "code/dependencyContext.hpp" |
| 34 | #include "compiler/compilationPolicy.hpp" |
| 35 | #include "compiler/compileBroker.hpp" |
| 36 | #include "compiler/compileLog.hpp" |
| 37 | #include "compiler/compilerEvent.hpp" |
| 38 | #include "compiler/compilerOracle.hpp" |
| 39 | #include "compiler/directivesParser.hpp" |
| 40 | #include "interpreter/linkResolver.hpp" |
| 41 | #include "jfr/jfrEvents.hpp" |
| 42 | #include "logging/log.hpp" |
| 43 | #include "logging/logStream.hpp" |
| 44 | #include "memory/allocation.inline.hpp" |
| 45 | #include "memory/resourceArea.hpp" |
| 46 | #include "memory/universe.hpp" |
| 47 | #include "oops/methodData.hpp" |
| 48 | #include "oops/method.inline.hpp" |
| 49 | #include "oops/oop.inline.hpp" |
| 50 | #include "prims/jvmtiExport.hpp" |
| 51 | #include "prims/nativeLookup.hpp" |
| 52 | #include "prims/whitebox.hpp" |
| 53 | #include "runtime/atomic.hpp" |
| 54 | #include "runtime/escapeBarrier.hpp" |
| 55 | #include "runtime/globals_extension.hpp" |
| 56 | #include "runtime/handles.inline.hpp" |
| 57 | #include "runtime/init.hpp" |
| 58 | #include "runtime/interfaceSupport.inline.hpp" |
| 59 | #include "runtime/java.hpp" |
| 60 | #include "runtime/javaCalls.hpp" |
| 61 | #include "runtime/jniHandles.inline.hpp" |
| 62 | #include "runtime/os.hpp" |
| 63 | #include "runtime/perfData.hpp" |
| 64 | #include "runtime/safepointVerifiers.hpp" |
| 65 | #include "runtime/sharedRuntime.hpp" |
| 66 | #include "runtime/sweeper.hpp" |
| 67 | #include "runtime/threadSMR.hpp" |
| 68 | #include "runtime/timerTrace.hpp" |
| 69 | #include "runtime/vframe.inline.hpp" |
| 70 | #include "utilities/debug.hpp" |
| 71 | #include "utilities/dtrace.hpp" |
| 72 | #include "utilities/events.hpp" |
| 73 | #include "utilities/formatBuffer.hpp" |
| 74 | #include "utilities/macros.hpp" |
| 75 | #ifdef COMPILER11 |
| 76 | #include "c1/c1_Compiler.hpp" |
| 77 | #endif |
| 78 | #if INCLUDE_JVMCI1 |
| 79 | #include "jvmci/jvmciEnv.hpp" |
| 80 | #include "jvmci/jvmciRuntime.hpp" |
| 81 | #endif |
| 82 | #ifdef COMPILER21 |
| 83 | #include "opto/c2compiler.hpp" |
| 84 | #endif |
| 85 | |
| 86 | #ifdef DTRACE_ENABLED |
| 87 | |
| 88 | // Only bother with this argument setup if dtrace is available |
| 89 | |
| 90 | #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ |
| 91 | { \ |
| 92 | Symbol* klass_name = (method)->klass_name(); \ |
| 93 | Symbol* name = (method)->name(); \ |
| 94 | Symbol* signature = (method)->signature(); \ |
| 95 | HOTSPOT_METHOD_COMPILE_BEGIN( \ |
| 96 | (char *) comp_name, strlen(comp_name), \ |
| 97 | (char *) klass_name->bytes(), klass_name->utf8_length(), \ |
| 98 | (char *) name->bytes(), name->utf8_length(), \ |
| 99 | (char *) signature->bytes(), signature->utf8_length()); \ |
| 100 | } |
| 101 | |
| 102 | #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ |
| 103 | { \ |
| 104 | Symbol* klass_name = (method)->klass_name(); \ |
| 105 | Symbol* name = (method)->name(); \ |
| 106 | Symbol* signature = (method)->signature(); \ |
| 107 | HOTSPOT_METHOD_COMPILE_END( \ |
| 108 | (char *) comp_name, strlen(comp_name), \ |
| 109 | (char *) klass_name->bytes(), klass_name->utf8_length(), \ |
| 110 | (char *) name->bytes(), name->utf8_length(), \ |
| 111 | (char *) signature->bytes(), signature->utf8_length(), (success)); \ |
| 112 | } |
| 113 | |
| 114 | #else // ndef DTRACE_ENABLED |
| 115 | |
| 116 | #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) |
| 117 | #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) |
| 118 | |
| 119 | #endif // ndef DTRACE_ENABLED |
| 120 | |
| 121 | bool CompileBroker::_initialized = false; |
| 122 | volatile bool CompileBroker::_should_block = false; |
| 123 | volatile int CompileBroker::_print_compilation_warning = 0; |
| 124 | volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; |
| 125 | |
| 126 | // The installed compiler(s) |
| 127 | AbstractCompiler* CompileBroker::_compilers[2]; |
| 128 | |
| 129 | // The maximum numbers of compiler threads to be determined during startup. |
| 130 | int CompileBroker::_c1_count = 0; |
| 131 | int CompileBroker::_c2_count = 0; |
| 132 | |
| 133 | // An array of compiler names as Java String objects |
| 134 | jobject* CompileBroker::_compiler1_objects = NULL__null; |
| 135 | jobject* CompileBroker::_compiler2_objects = NULL__null; |
| 136 | |
| 137 | CompileLog** CompileBroker::_compiler1_logs = NULL__null; |
| 138 | CompileLog** CompileBroker::_compiler2_logs = NULL__null; |
| 139 | |
| 140 | // These counters are used to assign an unique ID to each compilation. |
| 141 | volatile jint CompileBroker::_compilation_id = 0; |
| 142 | volatile jint CompileBroker::_osr_compilation_id = 0; |
| 143 | volatile jint CompileBroker::_native_compilation_id = 0; |
| 144 | |
| 145 | // Performance counters |
| 146 | PerfCounter* CompileBroker::_perf_total_compilation = NULL__null; |
| 147 | PerfCounter* CompileBroker::_perf_osr_compilation = NULL__null; |
| 148 | PerfCounter* CompileBroker::_perf_standard_compilation = NULL__null; |
| 149 | |
| 150 | PerfCounter* CompileBroker::_perf_total_bailout_count = NULL__null; |
| 151 | PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL__null; |
| 152 | PerfCounter* CompileBroker::_perf_total_compile_count = NULL__null; |
| 153 | PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL__null; |
| 154 | PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL__null; |
| 155 | |
| 156 | PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL__null; |
| 157 | PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL__null; |
| 158 | PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL__null; |
| 159 | PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL__null; |
| 160 | |
| 161 | PerfStringVariable* CompileBroker::_perf_last_method = NULL__null; |
| 162 | PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL__null; |
| 163 | PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL__null; |
| 164 | PerfVariable* CompileBroker::_perf_last_compile_type = NULL__null; |
| 165 | PerfVariable* CompileBroker::_perf_last_compile_size = NULL__null; |
| 166 | PerfVariable* CompileBroker::_perf_last_failed_type = NULL__null; |
| 167 | PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL__null; |
| 168 | |
| 169 | // Timers and counters for generating statistics |
| 170 | elapsedTimer CompileBroker::_t_total_compilation; |
| 171 | elapsedTimer CompileBroker::_t_osr_compilation; |
| 172 | elapsedTimer CompileBroker::_t_standard_compilation; |
| 173 | elapsedTimer CompileBroker::_t_invalidated_compilation; |
| 174 | elapsedTimer CompileBroker::_t_bailedout_compilation; |
| 175 | |
| 176 | int CompileBroker::_total_bailout_count = 0; |
| 177 | int CompileBroker::_total_invalidated_count = 0; |
| 178 | int CompileBroker::_total_compile_count = 0; |
| 179 | int CompileBroker::_total_osr_compile_count = 0; |
| 180 | int CompileBroker::_total_standard_compile_count = 0; |
| 181 | int CompileBroker::_total_compiler_stopped_count = 0; |
| 182 | int CompileBroker::_total_compiler_restarted_count = 0; |
| 183 | |
| 184 | int CompileBroker::_sum_osr_bytes_compiled = 0; |
| 185 | int CompileBroker::_sum_standard_bytes_compiled = 0; |
| 186 | int CompileBroker::_sum_nmethod_size = 0; |
| 187 | int CompileBroker::_sum_nmethod_code_size = 0; |
| 188 | |
| 189 | long CompileBroker::_peak_compilation_time = 0; |
| 190 | |
| 191 | CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization]; |
| 192 | |
| 193 | CompileQueue* CompileBroker::_c2_compile_queue = NULL__null; |
| 194 | CompileQueue* CompileBroker::_c1_compile_queue = NULL__null; |
| 195 | |
| 196 | |
| 197 | |
| 198 | class CompilationLog : public StringEventLog { |
| 199 | public: |
| 200 | CompilationLog() : StringEventLog("Compilation events", "jit") { |
| 201 | } |
| 202 | |
| 203 | void log_compile(JavaThread* thread, CompileTask* task) { |
| 204 | StringLogMessage lm; |
| 205 | stringStream sstr(lm.buffer(), lm.size()); |
| 206 | // msg.time_stamp().update_to(tty->time_stamp().ticks()); |
| 207 | task->print(&sstr, NULL__null, true, false); |
| 208 | log(thread, "%s", (const char*)lm); |
| 209 | } |
| 210 | |
| 211 | void log_nmethod(JavaThread* thread, nmethod* nm) { |
| 212 | log(thread, "nmethod %d%s " INTPTR_FORMAT"0x%016" "l" "x" " code [" INTPTR_FORMAT"0x%016" "l" "x" ", " INTPTR_FORMAT"0x%016" "l" "x" "]", |
| 213 | nm->compile_id(), nm->is_osr_method() ? "%" : "", |
| 214 | p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); |
| 215 | } |
| 216 | |
| 217 | void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { |
| 218 | StringLogMessage lm; |
| 219 | lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); |
| 220 | if (retry_message != NULL__null) { |
| 221 | lm.append(" (%s)", retry_message); |
| 222 | } |
| 223 | lm.print("\n"); |
| 224 | log(thread, "%s", (const char*)lm); |
| 225 | } |
| 226 | |
| 227 | void log_metaspace_failure(const char* reason) { |
| 228 | ResourceMark rm; |
| 229 | StringLogMessage lm; |
| 230 | lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); |
| 231 | lm.print("\n"); |
| 232 | log(JavaThread::current(), "%s", (const char*)lm); |
| 233 | } |
| 234 | }; |
| 235 | |
| 236 | static CompilationLog* _compilation_log = NULL__null; |
| 237 | |
| 238 | bool compileBroker_init() { |
| 239 | if (LogEvents) { |
| 240 | _compilation_log = new CompilationLog(); |
| 241 | } |
| 242 | |
| 243 | // init directives stack, adding default directive |
| 244 | DirectivesStack::init(); |
| 245 | |
| 246 | if (DirectivesParser::has_file()) { |
| 247 | return DirectivesParser::parse_from_flag(); |
| 248 | } else if (CompilerDirectivesPrint) { |
| 249 | // Print default directive even when no other was added |
| 250 | DirectivesStack::print(tty); |
| 251 | } |
| 252 | |
| 253 | return true; |
| 254 | } |
| 255 | |
| 256 | CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { |
| 257 | CompilerThread* thread = CompilerThread::current(); |
| 258 | thread->set_task(task); |
| 259 | CompileLog* log = thread->log(); |
| 260 | if (log != NULL__null && !task->is_unloaded()) task->log_task_start(log); |
| 261 | } |
| 262 | |
| 263 | CompileTaskWrapper::~CompileTaskWrapper() { |
| 264 | CompilerThread* thread = CompilerThread::current(); |
| 265 | CompileTask* task = thread->task(); |
| 266 | CompileLog* log = thread->log(); |
| 267 | if (log != NULL__null && !task->is_unloaded()) task->log_task_done(log); |
| 268 | thread->set_task(NULL__null); |
| 269 | task->set_code_handle(NULL__null); |
| 270 | thread->set_env(NULL__null); |
| 271 | if (task->is_blocking()) { |
| 272 | bool free_task = false; |
| 273 | { |
| 274 | MutexLocker notifier(thread, task->lock()); |
| 275 | task->mark_complete(); |
| 276 | #if INCLUDE_JVMCI1 |
| 277 | if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { |
| 278 | if (!task->has_waiter()) { |
| 279 | // The waiting thread timed out and thus did not free the task. |
| 280 | free_task = true; |
| 281 | } |
| 282 | task->set_blocking_jvmci_compile_state(NULL__null); |
| 283 | } |
| 284 | #endif |
| 285 | if (!free_task) { |
| 286 | // Notify the waiting thread that the compilation has completed |
| 287 | // so that it can free the task. |
| 288 | task->lock()->notify_all(); |
| 289 | } |
| 290 | } |
| 291 | if (free_task) { |
| 292 | // The task can only be freed once the task lock is released. |
| 293 | CompileTask::free(task); |
| 294 | } |
| 295 | } else { |
| 296 | task->mark_complete(); |
| 297 | |
| 298 | // By convention, the compiling thread is responsible for |
| 299 | // recycling a non-blocking CompileTask. |
| 300 | CompileTask::free(task); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | /** |
| 305 | * Check if a CompilerThread can be removed and update count if requested. |
| 306 | */ |
| 307 | bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) { |
| 308 | assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here")do { if (!(UseDynamicNumberOfCompilerThreads)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 308, "assert(" "UseDynamicNumberOfCompilerThreads" ") failed" , "or shouldn't be here"); ::breakpoint(); } } while (0); |
| 309 | if (!ReduceNumberOfCompilerThreads) return false; |
| 310 | |
| 311 | AbstractCompiler *compiler = ct->compiler(); |
| 312 | int compiler_count = compiler->num_compiler_threads(); |
| 313 | bool c1 = compiler->is_c1(); |
| 314 | |
| 315 | // Keep at least 1 compiler thread of each type. |
| 316 | if (compiler_count < 2) return false; |
| 317 | |
| 318 | // Keep thread alive for at least some time. |
| 319 | if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; |
| 320 | |
| 321 | #if INCLUDE_JVMCI1 |
| 322 | if (compiler->is_jvmci()) { |
| 323 | // Handles for JVMCI thread objects may get released concurrently. |
| 324 | if (do_it) { |
| 325 | assert(CompileThread_lock->owner() == ct, "must be holding lock")do { if (!(CompileThread_lock->owner() == ct)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 325, "assert(" "CompileThread_lock->owner() == ct" ") failed" , "must be holding lock"); ::breakpoint(); } } while (0); |
| 326 | } else { |
| 327 | // Skip check if it's the last thread and let caller check again. |
| 328 | return true; |
| 329 | } |
| 330 | } |
| 331 | #endif |
| 332 | |
| 333 | // We only allow the last compiler thread of each type to get removed. |
| 334 | jobject last_compiler = c1 ? compiler1_object(compiler_count - 1) |
| 335 | : compiler2_object(compiler_count - 1); |
| 336 | if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) { |
| 337 | if (do_it) { |
| 338 | assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. |
| 339 | compiler->set_num_compiler_threads(compiler_count - 1); |
| 340 | #if INCLUDE_JVMCI1 |
| 341 | if (compiler->is_jvmci()) { |
| 342 | // Old j.l.Thread object can die when no longer referenced elsewhere. |
| 343 | JNIHandles::destroy_global(compiler2_object(compiler_count - 1)); |
| 344 | _compiler2_objects[compiler_count - 1] = NULL__null; |
| 345 | } |
| 346 | #endif |
| 347 | } |
| 348 | return true; |
| 349 | } |
| 350 | return false; |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * Add a CompileTask to a CompileQueue. |
| 355 | */ |
| 356 | void CompileQueue::add(CompileTask* task) { |
| 357 | assert(MethodCompileQueue_lock->owned_by_self(), "must own lock")do { if (!(MethodCompileQueue_lock->owned_by_self())) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 357, "assert(" "MethodCompileQueue_lock->owned_by_self()" ") failed", "must own lock"); ::breakpoint(); } } while (0); |
| 358 | |
| 359 | task->set_next(NULL__null); |
| 360 | task->set_prev(NULL__null); |
| 361 | |
| 362 | if (_last == NULL__null) { |
| 363 | // The compile queue is empty. |
| 364 | assert(_first == NULL, "queue is empty")do { if (!(_first == __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 364, "assert(" "_first == __null" ") failed", "queue is empty" ); ::breakpoint(); } } while (0); |
| 365 | _first = task; |
| 366 | _last = task; |
| 367 | } else { |
| 368 | // Append the task to the queue. |
| 369 | assert(_last->next() == NULL, "not last")do { if (!(_last->next() == __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 369, "assert(" "_last->next() == __null" ") failed", "not last" ); ::breakpoint(); } } while (0); |
| 370 | _last->set_next(task); |
| 371 | task->set_prev(_last); |
| 372 | _last = task; |
| 373 | } |
| 374 | ++_size; |
| 375 | |
| 376 | // Mark the method as being in the compile queue. |
| 377 | task->method()->set_queued_for_compilation(); |
| 378 | |
| 379 | if (CIPrintCompileQueue) { |
| 380 | print_tty(); |
| 381 | } |
| 382 | |
| 383 | if (LogCompilation && xtty != NULL__null) { |
| 384 | task->log_task_queued(); |
| 385 | } |
| 386 | |
| 387 | // Notify CompilerThreads that a task is available. |
| 388 | MethodCompileQueue_lock->notify_all(); |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Empties compilation queue by putting all compilation tasks onto |
| 393 | * a freelist. Furthermore, the method wakes up all threads that are |
| 394 | * waiting on a compilation task to finish. This can happen if background |
| 395 | * compilation is disabled. |
| 396 | */ |
| 397 | void CompileQueue::free_all() { |
| 398 | MutexLocker mu(MethodCompileQueue_lock); |
| 399 | CompileTask* next = _first; |
| 400 | |
| 401 | // Iterate over all tasks in the compile queue |
| 402 | while (next != NULL__null) { |
| 403 | CompileTask* current = next; |
| 404 | next = current->next(); |
| 405 | { |
| 406 | // Wake up thread that blocks on the compile task. |
| 407 | MutexLocker ct_lock(current->lock()); |
| 408 | current->lock()->notify(); |
| 409 | } |
| 410 | // Put the task back on the freelist. |
| 411 | CompileTask::free(current); |
| 412 | } |
| 413 | _first = NULL__null; |
| 414 | _last = NULL__null; |
| 415 | |
| 416 | // Wake up all threads that block on the queue. |
| 417 | MethodCompileQueue_lock->notify_all(); |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * Get the next CompileTask from a CompileQueue |
| 422 | */ |
| 423 | CompileTask* CompileQueue::get() { |
| 424 | // save methods from RedefineClasses across safepoint |
| 425 | // across MethodCompileQueue_lock below. |
| 426 | methodHandle save_method; |
| 427 | methodHandle save_hot_method; |
| 428 | |
| 429 | MonitorLocker locker(MethodCompileQueue_lock); |
| 430 | // If _first is NULL we have no more compile jobs. There are two reasons for |
| 431 | // having no compile jobs: First, we compiled everything we wanted. Second, |
| 432 | // we ran out of code cache so compilation has been disabled. In the latter |
| 433 | // case we perform code cache sweeps to free memory such that we can re-enable |
| 434 | // compilation. |
| 435 | while (_first == NULL__null) { |
| 436 | // Exit loop if compilation is disabled forever |
| 437 | if (CompileBroker::is_compilation_disabled_forever()) { |
| 438 | return NULL__null; |
| 439 | } |
| 440 | |
| 441 | // If there are no compilation tasks and we can compile new jobs |
| 442 | // (i.e., there is enough free space in the code cache) there is |
| 443 | // no need to invoke the sweeper. As a result, the hotness of methods |
| 444 | // remains unchanged. This behavior is desired, since we want to keep |
| 445 | // the stable state, i.e., we do not want to evict methods from the |
| 446 | // code cache if it is unnecessary. |
| 447 | // We need a timed wait here, since compiler threads can exit if compilation |
| 448 | // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads |
| 449 | // is not critical and we do not want idle compiler threads to wake up too often. |
| 450 | locker.wait(5*1000); |
| 451 | |
| 452 | if (UseDynamicNumberOfCompilerThreads && _first == NULL__null) { |
| 453 | // Still nothing to compile. Give caller a chance to stop this thread. |
| 454 | if (CompileBroker::can_remove(CompilerThread::current(), false)) return NULL__null; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | if (CompileBroker::is_compilation_disabled_forever()) { |
| 459 | return NULL__null; |
| 460 | } |
| 461 | |
| 462 | CompileTask* task; |
| 463 | { |
| 464 | NoSafepointVerifier nsv; |
| 465 | task = CompilationPolicy::select_task(this); |
| 466 | if (task != NULL__null) { |
| 467 | task = task->select_for_compilation(); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | if (task != NULL__null) { |
| 472 | // Save method pointers across unlock safepoint. The task is removed from |
| 473 | // the compilation queue, which is walked during RedefineClasses. |
| 474 | Thread* thread = Thread::current(); |
| 475 | save_method = methodHandle(thread, task->method()); |
| 476 | save_hot_method = methodHandle(thread, task->hot_method()); |
| 477 | |
| 478 | remove(task); |
| 479 | } |
| 480 | purge_stale_tasks(); // may temporarily release MCQ lock |
| 481 | return task; |
| 482 | } |
| 483 | |
| 484 | // Clean & deallocate stale compile tasks. |
| 485 | // Temporarily releases MethodCompileQueue lock. |
| 486 | void CompileQueue::purge_stale_tasks() { |
| 487 | assert(MethodCompileQueue_lock->owned_by_self(), "must own lock")do { if (!(MethodCompileQueue_lock->owned_by_self())) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 487, "assert(" "MethodCompileQueue_lock->owned_by_self()" ") failed", "must own lock"); ::breakpoint(); } } while (0); |
| 488 | if (_first_stale != NULL__null) { |
| 489 | // Stale tasks are purged when MCQ lock is released, |
| 490 | // but _first_stale updates are protected by MCQ lock. |
| 491 | // Once task processing starts and MCQ lock is released, |
| 492 | // other compiler threads can reuse _first_stale. |
| 493 | CompileTask* head = _first_stale; |
| 494 | _first_stale = NULL__null; |
| 495 | { |
| 496 | MutexUnlocker ul(MethodCompileQueue_lock); |
| 497 | for (CompileTask* task = head; task != NULL__null; ) { |
| 498 | CompileTask* next_task = task->next(); |
| 499 | CompileTaskWrapper ctw(task); // Frees the task |
| 500 | task->set_failure_reason("stale task"); |
| 501 | task = next_task; |
| 502 | } |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | void CompileQueue::remove(CompileTask* task) { |
| 508 | assert(MethodCompileQueue_lock->owned_by_self(), "must own lock")do { if (!(MethodCompileQueue_lock->owned_by_self())) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 508, "assert(" "MethodCompileQueue_lock->owned_by_self()" ") failed", "must own lock"); ::breakpoint(); } } while (0); |
| 509 | if (task->prev() != NULL__null) { |
| 510 | task->prev()->set_next(task->next()); |
| 511 | } else { |
| 512 | // max is the first element |
| 513 | assert(task == _first, "Sanity")do { if (!(task == _first)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 513, "assert(" "task == _first" ") failed", "Sanity"); ::breakpoint (); } } while (0); |
| 514 | _first = task->next(); |
| 515 | } |
| 516 | |
| 517 | if (task->next() != NULL__null) { |
| 518 | task->next()->set_prev(task->prev()); |
| 519 | } else { |
| 520 | // max is the last element |
| 521 | assert(task == _last, "Sanity")do { if (!(task == _last)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 521, "assert(" "task == _last" ") failed", "Sanity"); ::breakpoint (); } } while (0); |
| 522 | _last = task->prev(); |
| 523 | } |
| 524 | --_size; |
| 525 | } |
| 526 | |
| 527 | void CompileQueue::remove_and_mark_stale(CompileTask* task) { |
| 528 | assert(MethodCompileQueue_lock->owned_by_self(), "must own lock")do { if (!(MethodCompileQueue_lock->owned_by_self())) { (* g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 528, "assert(" "MethodCompileQueue_lock->owned_by_self()" ") failed", "must own lock"); ::breakpoint(); } } while (0); |
| 529 | remove(task); |
| 530 | |
| 531 | // Enqueue the task for reclamation (should be done outside MCQ lock) |
| 532 | task->set_next(_first_stale); |
| 533 | task->set_prev(NULL__null); |
| 534 | _first_stale = task; |
| 535 | } |
| 536 | |
| 537 | // methods in the compile queue need to be marked as used on the stack |
| 538 | // so that they don't get reclaimed by Redefine Classes |
| 539 | void CompileQueue::mark_on_stack() { |
| 540 | CompileTask* task = _first; |
| 541 | while (task != NULL__null) { |
| 542 | task->mark_on_stack(); |
| 543 | task = task->next(); |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | |
| 548 | CompileQueue* CompileBroker::compile_queue(int comp_level) { |
| 549 | if (is_c2_compile(comp_level)) return _c2_compile_queue; |
| 550 | if (is_c1_compile(comp_level)) return _c1_compile_queue; |
| 551 | return NULL__null; |
| 552 | } |
| 553 | |
| 554 | void CompileBroker::print_compile_queues(outputStream* st) { |
| 555 | st->print_cr("Current compiles: "); |
| 556 | |
| 557 | char buf[2000]; |
| 558 | int buflen = sizeof(buf); |
| 559 | Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true); |
| 560 | |
| 561 | st->cr(); |
| 562 | if (_c1_compile_queue != NULL__null) { |
| 563 | _c1_compile_queue->print(st); |
| 564 | } |
| 565 | if (_c2_compile_queue != NULL__null) { |
| 566 | _c2_compile_queue->print(st); |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | void CompileQueue::print(outputStream* st) { |
| 571 | assert_locked_or_safepoint(MethodCompileQueue_lock); |
| 572 | st->print_cr("%s:", name()); |
| 573 | CompileTask* task = _first; |
| 574 | if (task == NULL__null) { |
| 575 | st->print_cr("Empty"); |
| 576 | } else { |
| 577 | while (task != NULL__null) { |
| 578 | task->print(st, NULL__null, true, true); |
| 579 | task = task->next(); |
| 580 | } |
| 581 | } |
| 582 | st->cr(); |
| 583 | } |
| 584 | |
| 585 | void CompileQueue::print_tty() { |
| 586 | ResourceMark rm; |
| 587 | stringStream ss; |
| 588 | // Dump the compile queue into a buffer before locking the tty |
| 589 | print(&ss); |
| 590 | { |
| 591 | ttyLocker ttyl; |
| 592 | tty->print("%s", ss.as_string()); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | CompilerCounters::CompilerCounters() { |
| 597 | _current_method[0] = '\0'; |
| 598 | _compile_type = CompileBroker::no_compile; |
| 599 | } |
| 600 | |
| 601 | #if INCLUDE_JFR1 && COMPILER2_OR_JVMCI1 |
| 602 | // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping |
| 603 | // in compiler/compilerEvent.cpp) and registers it with its serializer. |
| 604 | // |
| 605 | // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp, |
| 606 | // so if c2 is used, it should be always registered first. |
| 607 | // This function is called during vm initialization. |
| 608 | void register_jfr_phasetype_serializer(CompilerType compiler_type) { |
| 609 | ResourceMark rm; |
| 610 | static bool first_registration = true; |
| 611 | if (compiler_type == compiler_jvmci) { |
| 612 | CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false); |
| 613 | first_registration = false; |
| 614 | #ifdef COMPILER21 |
| 615 | } else if (compiler_type == compiler_c2) { |
| 616 | assert(first_registration, "invariant")do { if (!(first_registration)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 616, "assert(" "first_registration" ") failed", "invariant" ); ::breakpoint(); } } while (0); // c2 must be registered first. |
| 617 | GrowableArray<const char*>* c2_phase_names = new GrowableArray<const char*>(PHASE_NUM_TYPES); |
| 618 | for (int i = 0; i < PHASE_NUM_TYPES; i++) { |
| 619 | const char* phase_name = CompilerPhaseTypeHelper::to_string((CompilerPhaseType) i); |
| 620 | CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false); |
| 621 | } |
| 622 | first_registration = false; |
| 623 | #endif // COMPILER2 |
| 624 | } |
| 625 | } |
| 626 | #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI |
| 627 | |
| 628 | // ------------------------------------------------------------------ |
| 629 | // CompileBroker::compilation_init |
| 630 | // |
| 631 | // Initialize the Compilation object |
| 632 | void CompileBroker::compilation_init_phase1(JavaThread* THREAD__the_thread__) { |
| 633 | // No need to initialize compilation system if we do not use it. |
| 634 | if (!UseCompiler) { |
| 635 | return; |
| 636 | } |
| 637 | // Set the interface to the current compiler(s). |
| 638 | _c1_count = CompilationPolicy::c1_count(); |
| 639 | _c2_count = CompilationPolicy::c2_count(); |
| 640 | |
| 641 | #if INCLUDE_JVMCI1 |
| 642 | if (EnableJVMCI) { |
| 643 | // This is creating a JVMCICompiler singleton. |
| 644 | JVMCICompiler* jvmci = new JVMCICompiler(); |
| 645 | |
| 646 | if (UseJVMCICompiler) { |
| 647 | _compilers[1] = jvmci; |
| 648 | if (FLAG_IS_DEFAULT(JVMCIThreads)(JVMFlag::is_default(Flag_JVMCIThreads_enum))) { |
| 649 | if (BootstrapJVMCI) { |
| 650 | // JVMCI will bootstrap so give it more threads |
| 651 | _c2_count = MIN2(32, os::active_processor_count()); |
| 652 | } |
| 653 | } else { |
| 654 | _c2_count = JVMCIThreads; |
| 655 | } |
| 656 | if (FLAG_IS_DEFAULT(JVMCIHostThreads)(JVMFlag::is_default(Flag_JVMCIHostThreads_enum))) { |
| 657 | } else { |
| 658 | #ifdef COMPILER11 |
| 659 | _c1_count = JVMCIHostThreads; |
| 660 | #endif // COMPILER1 |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | #endif // INCLUDE_JVMCI |
| 665 | |
| 666 | #ifdef COMPILER11 |
| 667 | if (_c1_count > 0) { |
| 668 | _compilers[0] = new Compiler(); |
| 669 | } |
| 670 | #endif // COMPILER1 |
| 671 | |
| 672 | #ifdef COMPILER21 |
| 673 | if (true JVMCI_ONLY( && !UseJVMCICompiler)&& !UseJVMCICompiler) { |
| 674 | if (_c2_count > 0) { |
| 675 | _compilers[1] = new C2Compiler(); |
| 676 | // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit. |
| 677 | // idToPhase mapping for c2 is in opto/phasetype.hpp |
| 678 | JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)register_jfr_phasetype_serializer(compiler_c2); |
| 679 | } |
| 680 | } |
| 681 | #endif // COMPILER2 |
| 682 | |
| 683 | #if INCLUDE_JVMCI1 |
| 684 | // Register after c2 registration. |
| 685 | // JVMCI CompilerPhaseType idToPhase mapping is dynamic. |
| 686 | if (EnableJVMCI) { |
| 687 | JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)register_jfr_phasetype_serializer(compiler_jvmci); |
| 688 | } |
| 689 | #endif // INCLUDE_JVMCI |
| 690 | |
| 691 | // Start the compiler thread(s) and the sweeper thread |
| 692 | init_compiler_sweeper_threads(); |
| 693 | // totalTime performance counter is always created as it is required |
| 694 | // by the implementation of java.lang.management.CompilationMXBean. |
| 695 | { |
| 696 | // Ensure OOM leads to vm_exit_during_initialization. |
| 697 | EXCEPTION_MARKExceptionMark __em; JavaThread* __the_thread__ = __em.thread( );; |
| 698 | _perf_total_compilation = |
| 699 | PerfDataManager::create_counter(JAVA_CI, "totalTime", |
| 700 | PerfData::U_Ticks, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 701 | } |
| 702 | |
| 703 | if (UsePerfData) { |
| 704 | |
| 705 | EXCEPTION_MARKExceptionMark __em; JavaThread* __the_thread__ = __em.thread( );; |
| 706 | |
| 707 | // create the jvmstat performance counters |
| 708 | _perf_osr_compilation = |
| 709 | PerfDataManager::create_counter(SUN_CI, "osrTime", |
| 710 | PerfData::U_Ticks, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 711 | |
| 712 | _perf_standard_compilation = |
| 713 | PerfDataManager::create_counter(SUN_CI, "standardTime", |
| 714 | PerfData::U_Ticks, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 715 | |
| 716 | _perf_total_bailout_count = |
| 717 | PerfDataManager::create_counter(SUN_CI, "totalBailouts", |
| 718 | PerfData::U_Events, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 719 | |
| 720 | _perf_total_invalidated_count = |
| 721 | PerfDataManager::create_counter(SUN_CI, "totalInvalidates", |
| 722 | PerfData::U_Events, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 723 | |
| 724 | _perf_total_compile_count = |
| 725 | PerfDataManager::create_counter(SUN_CI, "totalCompiles", |
| 726 | PerfData::U_Events, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 727 | _perf_total_osr_compile_count = |
| 728 | PerfDataManager::create_counter(SUN_CI, "osrCompiles", |
| 729 | PerfData::U_Events, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 730 | |
| 731 | _perf_total_standard_compile_count = |
| 732 | PerfDataManager::create_counter(SUN_CI, "standardCompiles", |
| 733 | PerfData::U_Events, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 734 | |
| 735 | _perf_sum_osr_bytes_compiled = |
| 736 | PerfDataManager::create_counter(SUN_CI, "osrBytes", |
| 737 | PerfData::U_Bytes, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 738 | |
| 739 | _perf_sum_standard_bytes_compiled = |
| 740 | PerfDataManager::create_counter(SUN_CI, "standardBytes", |
| 741 | PerfData::U_Bytes, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 742 | |
| 743 | _perf_sum_nmethod_size = |
| 744 | PerfDataManager::create_counter(SUN_CI, "nmethodSize", |
| 745 | PerfData::U_Bytes, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 746 | |
| 747 | _perf_sum_nmethod_code_size = |
| 748 | PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", |
| 749 | PerfData::U_Bytes, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 750 | |
| 751 | _perf_last_method = |
| 752 | PerfDataManager::create_string_variable(SUN_CI, "lastMethod", |
| 753 | CompilerCounters::cmname_buffer_length, |
| 754 | "", CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 755 | |
| 756 | _perf_last_failed_method = |
| 757 | PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", |
| 758 | CompilerCounters::cmname_buffer_length, |
| 759 | "", CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 760 | |
| 761 | _perf_last_invalidated_method = |
| 762 | PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", |
| 763 | CompilerCounters::cmname_buffer_length, |
| 764 | "", CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 765 | |
| 766 | _perf_last_compile_type = |
| 767 | PerfDataManager::create_variable(SUN_CI, "lastType", |
| 768 | PerfData::U_None, |
| 769 | (jlong)CompileBroker::no_compile, |
| 770 | CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 771 | |
| 772 | _perf_last_compile_size = |
| 773 | PerfDataManager::create_variable(SUN_CI, "lastSize", |
| 774 | PerfData::U_Bytes, |
| 775 | (jlong)CompileBroker::no_compile, |
| 776 | CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 777 | |
| 778 | |
| 779 | _perf_last_failed_type = |
| 780 | PerfDataManager::create_variable(SUN_CI, "lastFailedType", |
| 781 | PerfData::U_None, |
| 782 | (jlong)CompileBroker::no_compile, |
| 783 | CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 784 | |
| 785 | _perf_last_invalidated_type = |
| 786 | PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", |
| 787 | PerfData::U_None, |
| 788 | (jlong)CompileBroker::no_compile, |
| 789 | CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | // Completes compiler initialization. Compilation requests submitted |
| 794 | // prior to this will be silently ignored. |
| 795 | void CompileBroker::compilation_init_phase2() { |
| 796 | _initialized = true; |
| 797 | } |
| 798 | |
| 799 | Handle CompileBroker::create_thread_oop(const char* name, TRAPSJavaThread* __the_thread__) { |
| 800 | Handle thread_oop = JavaThread::create_system_thread_object(name, false /* not visible */, CHECK_NH__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return Handle(); (void)(0); |
| 801 | return thread_oop; |
| 802 | } |
| 803 | |
| 804 | #if defined(ASSERT1) && COMPILER2_OR_JVMCI1 |
| 805 | // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to |
| 806 | // the running java application. Configured with vm options DeoptimizeObjectsALot*. |
| 807 | class DeoptimizeObjectsALotThread : public JavaThread { |
| 808 | |
| 809 | static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPSJavaThread* __the_thread__); |
| 810 | void deoptimize_objects_alot_loop_single(); |
| 811 | void deoptimize_objects_alot_loop_all(); |
| 812 | |
| 813 | public: |
| 814 | DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { } |
| 815 | |
| 816 | bool is_hidden_from_external_view() const { return true; } |
| 817 | }; |
| 818 | |
| 819 | // Entry for DeoptimizeObjectsALotThread. The threads are started in |
| 820 | // CompileBroker::init_compiler_sweeper_threads() iff DeoptimizeObjectsALot is enabled |
| 821 | void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPSJavaThread* __the_thread__) { |
| 822 | DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread); |
| 823 | bool enter_single_loop; |
| 824 | { |
| 825 | MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag); |
| 826 | static int single_thread_count = 0; |
| 827 | enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle; |
| 828 | } |
| 829 | if (enter_single_loop) { |
| 830 | dt->deoptimize_objects_alot_loop_single(); |
| 831 | } else { |
| 832 | dt->deoptimize_objects_alot_loop_all(); |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each |
| 837 | // barrier targets a single thread which is selected round robin. |
| 838 | void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() { |
| 839 | HandleMark hm(this); |
| 840 | while (true) { |
| 841 | for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) { |
| 842 | { // Begin new scope for escape barrier |
| 843 | HandleMarkCleaner hmc(this); |
| 844 | ResourceMark rm(this); |
| 845 | EscapeBarrier eb(true, this, deoptee_thread); |
| 846 | eb.deoptimize_objects(100); |
| 847 | } |
| 848 | // Now sleep after the escape barriers destructor resumed deoptee_thread. |
| 849 | sleep(DeoptimizeObjectsALotInterval); |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each |
| 855 | // barrier targets all java threads in the vm at once. |
| 856 | void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() { |
| 857 | HandleMark hm(this); |
| 858 | while (true) { |
| 859 | { // Begin new scope for escape barrier |
| 860 | HandleMarkCleaner hmc(this); |
| 861 | ResourceMark rm(this); |
| 862 | EscapeBarrier eb(true, this); |
| 863 | eb.deoptimize_objects_all_threads(); |
| 864 | } |
| 865 | // Now sleep after the escape barriers destructor resumed the java threads. |
| 866 | sleep(DeoptimizeObjectsALotInterval); |
| 867 | } |
| 868 | } |
| 869 | #endif // defined(ASSERT) && COMPILER2_OR_JVMCI |
| 870 | |
| 871 | |
| 872 | JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD__the_thread__) { |
| 873 | JavaThread* new_thread = NULL__null; |
| 874 | |
| 875 | switch (type) { |
| 876 | case compiler_t: |
| 877 | assert(comp != NULL, "Compiler instance missing.")do { if (!(comp != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 877, "assert(" "comp != __null" ") failed", "Compiler instance missing." ); ::breakpoint(); } } while (0); |
| 878 | if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { |
| 879 | CompilerCounters* counters = new CompilerCounters(); |
| 880 | new_thread = new CompilerThread(queue, counters); |
| 881 | } |
| 882 | break; |
| 883 | case sweeper_t: |
| 884 | new_thread = new CodeCacheSweeperThread(); |
| 885 | break; |
| 886 | #if defined(ASSERT1) && COMPILER2_OR_JVMCI1 |
| 887 | case deoptimizer_t: |
| 888 | new_thread = new DeoptimizeObjectsALotThread(); |
| 889 | break; |
| 890 | #endif // ASSERT |
| 891 | default: |
| 892 | ShouldNotReachHere()do { (*g_assert_poison) = 'X';; report_should_not_reach_here( "/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 892); ::breakpoint(); } while (0); |
| 893 | } |
| 894 | |
| 895 | // At this point the new CompilerThread data-races with this startup |
| 896 | // thread (which is the main thread and NOT the VM thread). |
| 897 | // This means Java bytecodes being executed at startup can |
| 898 | // queue compile jobs which will run at whatever default priority the |
| 899 | // newly created CompilerThread runs at. |
| 900 | |
| 901 | |
| 902 | // At this point it may be possible that no osthread was created for the |
| 903 | // JavaThread due to lack of resources. We will handle that failure below. |
| 904 | // Also check new_thread so that static analysis is happy. |
| 905 | if (new_thread != NULL__null && new_thread->osthread() != NULL__null) { |
| 906 | Handle thread_oop(THREAD__the_thread__, JNIHandles::resolve_non_null(thread_handle)); |
| 907 | |
| 908 | if (type == compiler_t) { |
| 909 | CompilerThread::cast(new_thread)->set_compiler(comp); |
| 910 | } |
| 911 | |
| 912 | // Note that we cannot call os::set_priority because it expects Java |
| 913 | // priorities and we are *explicitly* using OS priorities so that it's |
| 914 | // possible to set the compiler thread priority higher than any Java |
| 915 | // thread. |
| 916 | |
| 917 | int native_prio = CompilerThreadPriority; |
| 918 | if (native_prio == -1) { |
| 919 | if (UseCriticalCompilerThreadPriority) { |
| 920 | native_prio = os::java_to_os_priority[CriticalPriority]; |
| 921 | } else { |
| 922 | native_prio = os::java_to_os_priority[NearMaxPriority]; |
| 923 | } |
| 924 | } |
| 925 | os::set_native_priority(new_thread, native_prio); |
| 926 | |
| 927 | // Note that this only sets the JavaThread _priority field, which by |
| 928 | // definition is limited to Java priorities and not OS priorities. |
| 929 | JavaThread::start_internal_daemon(THREAD__the_thread__, new_thread, thread_oop, NearMaxPriority); |
| 930 | |
| 931 | } else { // osthread initialization failure |
| 932 | if (UseDynamicNumberOfCompilerThreads && type == compiler_t |
| 933 | && comp->num_compiler_threads() > 0) { |
| 934 | // The new thread is not known to Thread-SMR yet so we can just delete. |
| 935 | delete new_thread; |
| 936 | return NULL__null; |
| 937 | } else { |
| 938 | vm_exit_during_initialization("java.lang.OutOfMemoryError", |
| 939 | os::native_thread_creation_failed_msg()); |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) |
| 944 | |
| 945 | return new_thread; |
| 946 | } |
| 947 | |
| 948 | |
| 949 | void CompileBroker::init_compiler_sweeper_threads() { |
| 950 | NMethodSweeper::set_sweep_threshold_bytes(static_cast<size_t>(SweeperThreshold * ReservedCodeCacheSize / 100.0)); |
| 951 | log_info(codecache, sweep)(!(LogImpl<(LogTag::_codecache), (LogTag::_sweep), (LogTag ::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag:: __NO_TAG)>::is_level(LogLevel::Info))) ? (void)0 : LogImpl <(LogTag::_codecache), (LogTag::_sweep), (LogTag::__NO_TAG ), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG) >::write<LogLevel::Info>("Sweeper threshold: " SIZE_FORMAT"%" "l" "u" " bytes", NMethodSweeper::sweep_threshold_bytes()); |
| 952 | |
| 953 | // Ensure any exceptions lead to vm_exit_during_initialization. |
| 954 | EXCEPTION_MARKExceptionMark __em; JavaThread* __the_thread__ = __em.thread( );; |
| 955 | #if !defined(ZERO) |
| 956 | assert(_c2_count > 0 || _c1_count > 0, "No compilers?")do { if (!(_c2_count > 0 || _c1_count > 0)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 956, "assert(" "_c2_count > 0 || _c1_count > 0" ") failed" , "No compilers?"); ::breakpoint(); } } while (0); |
| 957 | #endif // !ZERO |
| 958 | // Initialize the compilation queue |
| 959 | if (_c2_count > 0) { |
| 960 | const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :)UseJVMCICompiler ? "JVMCI compile queue" : "C2 compile queue"; |
| 961 | _c2_compile_queue = new CompileQueue(name); |
| 962 | _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler)(jobject*) (AllocateHeap((_c2_count) * sizeof(jobject), mtCompiler )); |
| 963 | _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler)(CompileLog**) (AllocateHeap((_c2_count) * sizeof(CompileLog* ), mtCompiler)); |
| 964 | } |
| 965 | if (_c1_count > 0) { |
| 966 | _c1_compile_queue = new CompileQueue("C1 compile queue"); |
| 967 | _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler)(jobject*) (AllocateHeap((_c1_count) * sizeof(jobject), mtCompiler )); |
| 968 | _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler)(CompileLog**) (AllocateHeap((_c1_count) * sizeof(CompileLog* ), mtCompiler)); |
| 969 | } |
| 970 | |
| 971 | char name_buffer[256]; |
| 972 | |
| 973 | for (int i = 0; i < _c2_count; i++) { |
| 974 | jobject thread_handle = NULL__null; |
| 975 | // Create all j.l.Thread objects for C1 and C2 threads here, but only one |
| 976 | // for JVMCI compiler which can create further ones on demand. |
| 977 | JVMCI_ONLY(if (!UseJVMCICompiler || !UseDynamicNumberOfCompilerThreads || i == 0) {)if (!UseJVMCICompiler || !UseDynamicNumberOfCompilerThreads || i == 0) { |
| 978 | // Create a name for our thread. |
| 979 | sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); |
| 980 | Handle thread_oop = create_thread_oop(name_buffer, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 981 | thread_handle = JNIHandles::make_global(thread_oop); |
| 982 | JVMCI_ONLY(})} |
| 983 | _compiler2_objects[i] = thread_handle; |
| 984 | _compiler2_logs[i] = NULL__null; |
| 985 | |
| 986 | if (!UseDynamicNumberOfCompilerThreads || i == 0) { |
| 987 | JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD__the_thread__); |
| 988 | assert(ct != NULL, "should have been handled for initial thread")do { if (!(ct != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 988, "assert(" "ct != __null" ") failed", "should have been handled for initial thread" ); ::breakpoint(); } } while (0); |
| 989 | _compilers[1]->set_num_compiler_threads(i + 1); |
| 990 | if (TraceCompilerThreads) { |
| 991 | ResourceMark rm; |
| 992 | ThreadsListHandle tlh; // name() depends on the TLH. |
| 993 | assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct))do { if (!(tlh.includes(ct))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 993, "assert(" "tlh.includes(ct)" ") failed", "ct=" "0x%016" "l" "x" " exited unexpectedly.", p2i(ct)); ::breakpoint(); } } while (0); |
| 994 | tty->print_cr("Added initial compiler thread %s", ct->name()); |
| 995 | } |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | for (int i = 0; i < _c1_count; i++) { |
| 1000 | // Create a name for our thread. |
| 1001 | sprintf(name_buffer, "C1 CompilerThread%d", i); |
| 1002 | Handle thread_oop = create_thread_oop(name_buffer, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 1003 | jobject thread_handle = JNIHandles::make_global(thread_oop); |
| 1004 | _compiler1_objects[i] = thread_handle; |
| 1005 | _compiler1_logs[i] = NULL__null; |
| 1006 | |
| 1007 | if (!UseDynamicNumberOfCompilerThreads || i == 0) { |
| 1008 | JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD__the_thread__); |
| 1009 | assert(ct != NULL, "should have been handled for initial thread")do { if (!(ct != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1009, "assert(" "ct != __null" ") failed", "should have been handled for initial thread" ); ::breakpoint(); } } while (0); |
| 1010 | _compilers[0]->set_num_compiler_threads(i + 1); |
| 1011 | if (TraceCompilerThreads) { |
| 1012 | ResourceMark rm; |
| 1013 | ThreadsListHandle tlh; // name() depends on the TLH. |
| 1014 | assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct))do { if (!(tlh.includes(ct))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1014, "assert(" "tlh.includes(ct)" ") failed", "ct=" "0x%016" "l" "x" " exited unexpectedly.", p2i(ct)); ::breakpoint(); } } while (0); |
| 1015 | tty->print_cr("Added initial compiler thread %s", ct->name()); |
| 1016 | } |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | if (UsePerfData) { |
| 1021 | PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 1022 | } |
| 1023 | |
| 1024 | if (MethodFlushing) { |
| 1025 | // Initialize the sweeper thread |
| 1026 | Handle thread_oop = create_thread_oop("Sweeper thread", CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 1027 | jobject thread_handle = JNIHandles::make_local(THREAD__the_thread__, thread_oop()); |
| 1028 | make_thread(sweeper_t, thread_handle, NULL__null, NULL__null, THREAD__the_thread__); |
| 1029 | } |
| 1030 | |
| 1031 | #if defined(ASSERT1) && COMPILER2_OR_JVMCI1 |
| 1032 | if (DeoptimizeObjectsALot) { |
| 1033 | // Initialize and start the object deoptimizer threads |
| 1034 | const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll; |
| 1035 | for (int count = 0; count < total_count; count++) { |
| 1036 | Handle thread_oop = create_thread_oop("Deoptimize objects a lot single mode", CHECK__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) return ; (void)(0); |
| 1037 | jobject thread_handle = JNIHandles::make_local(THREAD__the_thread__, thread_oop()); |
| 1038 | make_thread(deoptimizer_t, thread_handle, NULL__null, NULL__null, THREAD__the_thread__); |
| 1039 | } |
| 1040 | } |
| 1041 | #endif // defined(ASSERT) && COMPILER2_OR_JVMCI |
| 1042 | } |
| 1043 | |
| 1044 | void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD__the_thread__) { |
| 1045 | |
| 1046 | julong available_memory = os::available_memory(); |
| 1047 | // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All). |
| 1048 | size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled), |
| 1049 | available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled); |
| 1050 | |
| 1051 | // Only do attempt to start additional threads if the lock is free. |
| 1052 | if (!CompileThread_lock->try_lock()) return; |
| 1053 | |
| 1054 | if (_c2_compile_queue != NULL__null) { |
| 1055 | int old_c2_count = _compilers[1]->num_compiler_threads(); |
| 1056 | int new_c2_count = MIN4(_c2_count, |
| 1057 | _c2_compile_queue->size() / 2, |
| 1058 | (int)(available_memory / (200*M)), |
| 1059 | (int)(available_cc_np / (128*K))); |
| 1060 | |
| 1061 | for (int i = old_c2_count; i < new_c2_count; i++) { |
| 1062 | #if INCLUDE_JVMCI1 |
| 1063 | if (UseJVMCICompiler) { |
| 1064 | // Native compiler threads as used in C1/C2 can reuse the j.l.Thread |
| 1065 | // objects as their existence is completely hidden from the rest of |
| 1066 | // the VM (and those compiler threads can't call Java code to do the |
| 1067 | // creation anyway). For JVMCI we have to create new j.l.Thread objects |
| 1068 | // as they are visible and we can see unexpected thread lifecycle |
| 1069 | // transitions if we bind them to new JavaThreads. |
| 1070 | if (!THREAD__the_thread__->can_call_java()) break; |
| 1071 | char name_buffer[256]; |
| 1072 | sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); |
| 1073 | Handle thread_oop; |
| 1074 | { |
| 1075 | // We have to give up the lock temporarily for the Java calls. |
| 1076 | MutexUnlocker mu(CompileThread_lock); |
| 1077 | thread_oop = create_thread_oop(name_buffer, THREAD__the_thread__); |
| 1078 | } |
| 1079 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 1080 | if (TraceCompilerThreads) { |
| 1081 | ResourceMark rm; |
| 1082 | tty->print_cr("JVMCI compiler thread creation failed:"); |
| 1083 | PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->pending_exception())->print(); |
| 1084 | } |
| 1085 | CLEAR_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_exception( )); |
| 1086 | break; |
| 1087 | } |
| 1088 | // Check if another thread has beaten us during the Java calls. |
| 1089 | if (_compilers[1]->num_compiler_threads() != i) break; |
| 1090 | jobject thread_handle = JNIHandles::make_global(thread_oop); |
| 1091 | assert(compiler2_object(i) == NULL, "Old one must be released!")do { if (!(compiler2_object(i) == __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1091, "assert(" "compiler2_object(i) == __null" ") failed", "Old one must be released!"); ::breakpoint(); } } while (0); |
| 1092 | _compiler2_objects[i] = thread_handle; |
| 1093 | } |
| 1094 | #endif |
| 1095 | JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD__the_thread__); |
| 1096 | if (ct == NULL__null) break; |
| 1097 | _compilers[1]->set_num_compiler_threads(i + 1); |
| 1098 | if (TraceCompilerThreads) { |
| 1099 | ResourceMark rm; |
| 1100 | ThreadsListHandle tlh; // name() depends on the TLH. |
| 1101 | assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct))do { if (!(tlh.includes(ct))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1101, "assert(" "tlh.includes(ct)" ") failed", "ct=" "0x%016" "l" "x" " exited unexpectedly.", p2i(ct)); ::breakpoint(); } } while (0); |
| 1102 | tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)", |
| 1103 | ct->name(), (int)(available_memory/M), (int)(available_cc_np/M)); |
| 1104 | } |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | if (_c1_compile_queue != NULL__null) { |
| 1109 | int old_c1_count = _compilers[0]->num_compiler_threads(); |
| 1110 | int new_c1_count = MIN4(_c1_count, |
| 1111 | _c1_compile_queue->size() / 4, |
| 1112 | (int)(available_memory / (100*M)), |
| 1113 | (int)(available_cc_p / (128*K))); |
| 1114 | |
| 1115 | for (int i = old_c1_count; i < new_c1_count; i++) { |
| 1116 | JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD__the_thread__); |
| 1117 | if (ct == NULL__null) break; |
| 1118 | _compilers[0]->set_num_compiler_threads(i + 1); |
| 1119 | if (TraceCompilerThreads) { |
| 1120 | ResourceMark rm; |
| 1121 | ThreadsListHandle tlh; // name() depends on the TLH. |
| 1122 | assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct))do { if (!(tlh.includes(ct))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1122, "assert(" "tlh.includes(ct)" ") failed", "ct=" "0x%016" "l" "x" " exited unexpectedly.", p2i(ct)); ::breakpoint(); } } while (0); |
| 1123 | tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)", |
| 1124 | ct->name(), (int)(available_memory/M), (int)(available_cc_p/M)); |
| 1125 | } |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | CompileThread_lock->unlock(); |
| 1130 | } |
| 1131 | |
| 1132 | |
| 1133 | /** |
| 1134 | * Set the methods on the stack as on_stack so that redefine classes doesn't |
| 1135 | * reclaim them. This method is executed at a safepoint. |
| 1136 | */ |
| 1137 | void CompileBroker::mark_on_stack() { |
| 1138 | assert(SafepointSynchronize::is_at_safepoint(), "sanity check")do { if (!(SafepointSynchronize::is_at_safepoint())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1138, "assert(" "SafepointSynchronize::is_at_safepoint()" ") failed" , "sanity check"); ::breakpoint(); } } while (0); |
| 1139 | // Since we are at a safepoint, we do not need a lock to access |
| 1140 | // the compile queues. |
| 1141 | if (_c2_compile_queue != NULL__null) { |
| 1142 | _c2_compile_queue->mark_on_stack(); |
| 1143 | } |
| 1144 | if (_c1_compile_queue != NULL__null) { |
| 1145 | _c1_compile_queue->mark_on_stack(); |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | // ------------------------------------------------------------------ |
| 1150 | // CompileBroker::compile_method |
| 1151 | // |
| 1152 | // Request compilation of a method. |
| 1153 | void CompileBroker::compile_method_base(const methodHandle& method, |
| 1154 | int osr_bci, |
| 1155 | int comp_level, |
| 1156 | const methodHandle& hot_method, |
| 1157 | int hot_count, |
| 1158 | CompileTask::CompileReason compile_reason, |
| 1159 | bool blocking, |
| 1160 | Thread* thread) { |
| 1161 | guarantee(!method->is_abstract(), "cannot compile abstract methods")do { if (!(!method->is_abstract())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1161, "guarantee(" "!method->is_abstract()" ") failed", "cannot compile abstract methods" ); ::breakpoint(); } } while (0); |
| 1162 | assert(method->method_holder()->is_instance_klass(),do { if (!(method->method_holder()->is_instance_klass() )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1163, "assert(" "method->method_holder()->is_instance_klass()" ") failed", "sanity check"); ::breakpoint(); } } while (0) |
| 1163 | "sanity check")do { if (!(method->method_holder()->is_instance_klass() )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1163, "assert(" "method->method_holder()->is_instance_klass()" ") failed", "sanity check"); ::breakpoint(); } } while (0); |
| 1164 | assert(!method->method_holder()->is_not_initialized(),do { if (!(!method->method_holder()->is_not_initialized ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1165, "assert(" "!method->method_holder()->is_not_initialized()" ") failed", "method holder must be initialized"); ::breakpoint (); } } while (0) |
| 1165 | "method holder must be initialized")do { if (!(!method->method_holder()->is_not_initialized ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1165, "assert(" "!method->method_holder()->is_not_initialized()" ") failed", "method holder must be initialized"); ::breakpoint (); } } while (0); |
| 1166 | assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys")do { if (!(!method->is_method_handle_intrinsic())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1166, "assert(" "!method->is_method_handle_intrinsic()" ") failed" , "do not enqueue these guys"); ::breakpoint(); } } while (0); |
| 1167 | |
| 1168 | if (CIPrintRequests) { |
| 1169 | tty->print("request: "); |
| 1170 | method->print_short_name(tty); |
| 1171 | if (osr_bci != InvocationEntryBci) { |
| 1172 | tty->print(" osr_bci: %d", osr_bci); |
| 1173 | } |
| 1174 | tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); |
| 1175 | if (!hot_method.is_null()) { |
| 1176 | tty->print(" hot: "); |
| 1177 | if (hot_method() != method()) { |
| 1178 | hot_method->print_short_name(tty); |
| 1179 | } else { |
| 1180 | tty->print("yes"); |
| 1181 | } |
| 1182 | } |
| 1183 | tty->cr(); |
| 1184 | } |
| 1185 | |
| 1186 | // A request has been made for compilation. Before we do any |
| 1187 | // real work, check to see if the method has been compiled |
| 1188 | // in the meantime with a definitive result. |
| 1189 | if (compilation_is_complete(method, osr_bci, comp_level)) { |
| 1190 | return; |
| 1191 | } |
| 1192 | |
| 1193 | #ifndef PRODUCT |
| 1194 | if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)(JVMFlag::is_default(Flag_OSROnlyBCI_enum))) { |
| 1195 | if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { |
| 1196 | // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. |
| 1197 | return; |
| 1198 | } |
| 1199 | } |
| 1200 | #endif |
| 1201 | |
| 1202 | // If this method is already in the compile queue, then |
| 1203 | // we do not block the current thread. |
| 1204 | if (compilation_is_in_queue(method)) { |
| 1205 | // We may want to decay our counter a bit here to prevent |
| 1206 | // multiple denied requests for compilation. This is an |
| 1207 | // open compilation policy issue. Note: The other possibility, |
| 1208 | // in the case that this is a blocking compile request, is to have |
| 1209 | // all subsequent blocking requesters wait for completion of |
| 1210 | // ongoing compiles. Note that in this case we'll need a protocol |
| 1211 | // for freeing the associated compile tasks. [Or we could have |
| 1212 | // a single static monitor on which all these waiters sleep.] |
| 1213 | return; |
| 1214 | } |
| 1215 | |
| 1216 | // Tiered policy requires MethodCounters to exist before adding a method to |
| 1217 | // the queue. Create if we don't have them yet. |
| 1218 | method->get_method_counters(thread); |
| 1219 | |
| 1220 | // Outputs from the following MutexLocker block: |
| 1221 | CompileTask* task = NULL__null; |
| 1222 | CompileQueue* queue = compile_queue(comp_level); |
| 1223 | |
| 1224 | // Acquire our lock. |
| 1225 | { |
| 1226 | MutexLocker locker(thread, MethodCompileQueue_lock); |
| 1227 | |
| 1228 | // Make sure the method has not slipped into the queues since |
| 1229 | // last we checked; note that those checks were "fast bail-outs". |
| 1230 | // Here we need to be more careful, see 14012000 below. |
| 1231 | if (compilation_is_in_queue(method)) { |
| 1232 | return; |
| 1233 | } |
| 1234 | |
| 1235 | // We need to check again to see if the compilation has |
| 1236 | // completed. A previous compilation may have registered |
| 1237 | // some result. |
| 1238 | if (compilation_is_complete(method, osr_bci, comp_level)) { |
| 1239 | return; |
| 1240 | } |
| 1241 | |
| 1242 | // We now know that this compilation is not pending, complete, |
| 1243 | // or prohibited. Assign a compile_id to this compilation |
| 1244 | // and check to see if it is in our [Start..Stop) range. |
| 1245 | int compile_id = assign_compile_id(method, osr_bci); |
| 1246 | if (compile_id == 0) { |
| 1247 | // The compilation falls outside the allowed range. |
| 1248 | return; |
| 1249 | } |
| 1250 | |
| 1251 | #if INCLUDE_JVMCI1 |
| 1252 | if (UseJVMCICompiler && blocking) { |
| 1253 | // Don't allow blocking compiles for requests triggered by JVMCI. |
| 1254 | if (thread->is_Compiler_thread()) { |
| 1255 | blocking = false; |
| 1256 | } |
| 1257 | |
| 1258 | if (!UseJVMCINativeLibrary) { |
| 1259 | // Don't allow blocking compiles if inside a class initializer or while performing class loading |
| 1260 | vframeStream vfst(JavaThread::cast(thread)); |
| 1261 | for (; !vfst.at_end(); vfst.next()) { |
| 1262 | if (vfst.method()->is_static_initializer() || |
| 1263 | (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) && |
| 1264 | vfst.method()->name() == vmSymbols::loadClass_name())) { |
| 1265 | blocking = false; |
| 1266 | break; |
| 1267 | } |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | // Don't allow blocking compilation requests to JVMCI |
| 1272 | // if JVMCI itself is not yet initialized |
| 1273 | if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) { |
| 1274 | blocking = false; |
| 1275 | } |
| 1276 | |
| 1277 | // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown |
| 1278 | // to avoid deadlock between compiler thread(s) and threads run at shutdown |
| 1279 | // such as the DestroyJavaVM thread. |
| 1280 | if (JVMCI::in_shutdown()) { |
| 1281 | blocking = false; |
| 1282 | } |
| 1283 | } |
| 1284 | #endif // INCLUDE_JVMCI |
| 1285 | |
| 1286 | // We will enter the compilation in the queue. |
| 1287 | // 14012000: Note that this sets the queued_for_compile bits in |
| 1288 | // the target method. We can now reason that a method cannot be |
| 1289 | // queued for compilation more than once, as follows: |
| 1290 | // Before a thread queues a task for compilation, it first acquires |
| 1291 | // the compile queue lock, then checks if the method's queued bits |
| 1292 | // are set or it has already been compiled. Thus there can not be two |
| 1293 | // instances of a compilation task for the same method on the |
| 1294 | // compilation queue. Consider now the case where the compilation |
| 1295 | // thread has already removed a task for that method from the queue |
| 1296 | // and is in the midst of compiling it. In this case, the |
| 1297 | // queued_for_compile bits must be set in the method (and these |
| 1298 | // will be visible to the current thread, since the bits were set |
| 1299 | // under protection of the compile queue lock, which we hold now. |
| 1300 | // When the compilation completes, the compiler thread first sets |
| 1301 | // the compilation result and then clears the queued_for_compile |
| 1302 | // bits. Neither of these actions are protected by a barrier (or done |
| 1303 | // under the protection of a lock), so the only guarantee we have |
| 1304 | // (on machines with TSO (Total Store Order)) is that these values |
| 1305 | // will update in that order. As a result, the only combinations of |
| 1306 | // these bits that the current thread will see are, in temporal order: |
| 1307 | // <RESULT, QUEUE> : |
| 1308 | // <0, 1> : in compile queue, but not yet compiled |
| 1309 | // <1, 1> : compiled but queue bit not cleared |
| 1310 | // <1, 0> : compiled and queue bit cleared |
| 1311 | // Because we first check the queue bits then check the result bits, |
| 1312 | // we are assured that we cannot introduce a duplicate task. |
| 1313 | // Note that if we did the tests in the reverse order (i.e. check |
| 1314 | // result then check queued bit), we could get the result bit before |
| 1315 | // the compilation completed, and the queue bit after the compilation |
| 1316 | // completed, and end up introducing a "duplicate" (redundant) task. |
| 1317 | // In that case, the compiler thread should first check if a method |
| 1318 | // has already been compiled before trying to compile it. |
| 1319 | // NOTE: in the event that there are multiple compiler threads and |
| 1320 | // there is de-optimization/recompilation, things will get hairy, |
| 1321 | // and in that case it's best to protect both the testing (here) of |
| 1322 | // these bits, and their updating (here and elsewhere) under a |
| 1323 | // common lock. |
| 1324 | task = create_compile_task(queue, |
| 1325 | compile_id, method, |
| 1326 | osr_bci, comp_level, |
| 1327 | hot_method, hot_count, compile_reason, |
| 1328 | blocking); |
| 1329 | } |
| 1330 | |
| 1331 | if (blocking) { |
| 1332 | wait_for_completion(task); |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, |
| 1337 | int comp_level, |
| 1338 | const methodHandle& hot_method, int hot_count, |
| 1339 | CompileTask::CompileReason compile_reason, |
| 1340 | TRAPSJavaThread* __the_thread__) { |
| 1341 | // Do nothing if compilebroker is not initalized or compiles are submitted on level none |
| 1342 | if (!_initialized || comp_level == CompLevel_none) { |
| 1343 | return NULL__null; |
| 1344 | } |
| 1345 | |
| 1346 | AbstractCompiler *comp = CompileBroker::compiler(comp_level); |
| 1347 | assert(comp != NULL, "Ensure we have a compiler")do { if (!(comp != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1347, "assert(" "comp != __null" ") failed", "Ensure we have a compiler" ); ::breakpoint(); } } while (0); |
| 1348 | |
| 1349 | DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); |
| 1350 | // CompileBroker::compile_method can trap and can have pending aysnc exception. |
| 1351 | nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD__the_thread__); |
| 1352 | DirectivesStack::release(directive); |
| 1353 | return nm; |
| 1354 | } |
| 1355 | |
| 1356 | nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, |
| 1357 | int comp_level, |
| 1358 | const methodHandle& hot_method, int hot_count, |
| 1359 | CompileTask::CompileReason compile_reason, |
| 1360 | DirectiveSet* directive, |
| 1361 | TRAPSJavaThread* __the_thread__) { |
| 1362 | |
| 1363 | // make sure arguments make sense |
| 1364 | assert(method->method_holder()->is_instance_klass(), "not an instance method")do { if (!(method->method_holder()->is_instance_klass() )) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1364, "assert(" "method->method_holder()->is_instance_klass()" ") failed", "not an instance method"); ::breakpoint(); } } while (0); |
| 1365 | assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range")do { if (!(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1365, "assert(" "osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size())" ") failed", "bci out of range"); ::breakpoint(); } } while ( 0); |
| 1366 | assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods")do { if (!(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()))) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1366, "assert(" "!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native())" ") failed", "cannot compile abstract/native methods"); ::breakpoint (); } } while (0); |
| 1367 | assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized")do { if (!(!method->method_holder()->is_not_initialized ())) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1367, "assert(" "!method->method_holder()->is_not_initialized()" ") failed", "method holder must be initialized"); ::breakpoint (); } } while (0); |
| 1368 | // return quickly if possible |
| 1369 | |
| 1370 | // lock, make sure that the compilation |
| 1371 | // isn't prohibited in a straightforward way. |
| 1372 | AbstractCompiler* comp = CompileBroker::compiler(comp_level); |
| 1373 | if (comp == NULL__null || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { |
| 1374 | return NULL__null; |
| 1375 | } |
| 1376 | |
| 1377 | #if INCLUDE_JVMCI1 |
| 1378 | if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) { |
| 1379 | return NULL__null; |
| 1380 | } |
| 1381 | #endif |
| 1382 | |
| 1383 | if (osr_bci == InvocationEntryBci) { |
| 1384 | // standard compilation |
| 1385 | CompiledMethod* method_code = method->code(); |
| 1386 | if (method_code != NULL__null && method_code->is_nmethod()) { |
| 1387 | if (compilation_is_complete(method, osr_bci, comp_level)) { |
| 1388 | return (nmethod*) method_code; |
| 1389 | } |
| 1390 | } |
| 1391 | if (method->is_not_compilable(comp_level)) { |
| 1392 | return NULL__null; |
| 1393 | } |
| 1394 | } else { |
| 1395 | // osr compilation |
| 1396 | // We accept a higher level osr method |
| 1397 | nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); |
| 1398 | if (nm != NULL__null) return nm; |
| 1399 | if (method->is_not_osr_compilable(comp_level)) return NULL__null; |
| 1400 | } |
| 1401 | |
| 1402 | assert(!HAS_PENDING_EXCEPTION, "No exception should be present")do { if (!(!(((ThreadShadow*)__the_thread__)->has_pending_exception ()))) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1402, "assert(" "!(((ThreadShadow*)__the_thread__)->has_pending_exception())" ") failed", "No exception should be present"); ::breakpoint( ); } } while (0); |
| 1403 | // some prerequisites that are compiler specific |
| 1404 | if (comp->is_c2() || comp->is_jvmci()) { |
| 1405 | method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) { (((ThreadShadow*)__the_thread__)->clear_pending_nonasync_exception ()); return __null; } (void)(0); |
| 1406 | // Resolve all classes seen in the signature of the method |
| 1407 | // we are compiling. |
| 1408 | Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL__the_thread__); if ((((ThreadShadow*)__the_thread__)->has_pending_exception ())) { (((ThreadShadow*)__the_thread__)->clear_pending_nonasync_exception ()); return __null; } (void)(0); |
| 1409 | } |
| 1410 | |
| 1411 | // If the method is native, do the lookup in the thread requesting |
| 1412 | // the compilation. Native lookups can load code, which is not |
| 1413 | // permitted during compilation. |
| 1414 | // |
| 1415 | // Note: A native method implies non-osr compilation which is |
| 1416 | // checked with an assertion at the entry of this method. |
| 1417 | if (method->is_native() && !method->is_method_handle_intrinsic()) { |
| 1418 | address adr = NativeLookup::lookup(method, THREAD__the_thread__); |
Value stored to 'adr' during its initialization is never read | |
| 1419 | if (HAS_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->has_pending_exception())) { |
| 1420 | // In case of an exception looking up the method, we just forget |
| 1421 | // about it. The interpreter will kick-in and throw the exception. |
| 1422 | method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable() |
| 1423 | CLEAR_PENDING_EXCEPTION(((ThreadShadow*)__the_thread__)->clear_pending_exception( )); |
| 1424 | return NULL__null; |
| 1425 | } |
| 1426 | assert(method->has_native_function(), "must have native code by now")do { if (!(method->has_native_function())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1426, "assert(" "method->has_native_function()" ") failed" , "must have native code by now"); ::breakpoint(); } } while ( 0); |
| 1427 | } |
| 1428 | |
| 1429 | // RedefineClasses() has replaced this method; just return |
| 1430 | if (method->is_old()) { |
| 1431 | return NULL__null; |
| 1432 | } |
| 1433 | |
| 1434 | // JVMTI -- post_compile_event requires jmethod_id() that may require |
| 1435 | // a lock the compiling thread can not acquire. Prefetch it here. |
| 1436 | if (JvmtiExport::should_post_compiled_method_load()) { |
| 1437 | method->jmethod_id(); |
| 1438 | } |
| 1439 | |
| 1440 | // do the compilation |
| 1441 | if (method->is_native()) { |
| 1442 | if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { |
| 1443 | #if defined(X86) && !defined(ZERO) |
| 1444 | // The following native methods: |
| 1445 | // |
| 1446 | // java.lang.Float.intBitsToFloat |
| 1447 | // java.lang.Float.floatToRawIntBits |
| 1448 | // java.lang.Double.longBitsToDouble |
| 1449 | // java.lang.Double.doubleToRawLongBits |
| 1450 | // |
| 1451 | // are called through the interpreter even if interpreter native stubs |
| 1452 | // are not preferred (i.e., calling through adapter handlers is preferred). |
| 1453 | // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved |
| 1454 | // if the version of the methods from the native libraries is called. |
| 1455 | // As the interpreter and the C2-intrinsified version of the methods preserves |
| 1456 | // sNaNs, that would result in an inconsistent way of handling of sNaNs. |
| 1457 | if ((UseSSE >= 1 && |
| 1458 | (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || |
| 1459 | method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || |
| 1460 | (UseSSE >= 2 && |
| 1461 | (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || |
| 1462 | method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { |
| 1463 | return NULL__null; |
| 1464 | } |
| 1465 | #endif // X86 && !ZERO |
| 1466 | |
| 1467 | // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that |
| 1468 | // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). |
| 1469 | // |
| 1470 | // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter |
| 1471 | // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. |
| 1472 | AdapterHandlerLibrary::create_native_wrapper(method); |
| 1473 | } else { |
| 1474 | return NULL__null; |
| 1475 | } |
| 1476 | } else { |
| 1477 | // If the compiler is shut off due to code cache getting full |
| 1478 | // fail out now so blocking compiles dont hang the java thread |
| 1479 | if (!should_compile_new_jobs()) { |
| 1480 | return NULL__null; |
| 1481 | } |
| 1482 | bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles; |
| 1483 | compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD__the_thread__); |
| 1484 | } |
| 1485 | |
| 1486 | // return requested nmethod |
| 1487 | // We accept a higher level osr method |
| 1488 | if (osr_bci == InvocationEntryBci) { |
| 1489 | CompiledMethod* code = method->code(); |
| 1490 | if (code == NULL__null) { |
| 1491 | return (nmethod*) code; |
| 1492 | } else { |
| 1493 | return code->as_nmethod_or_null(); |
| 1494 | } |
| 1495 | } |
| 1496 | return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); |
| 1497 | } |
| 1498 | |
| 1499 | |
| 1500 | // ------------------------------------------------------------------ |
| 1501 | // CompileBroker::compilation_is_complete |
| 1502 | // |
| 1503 | // See if compilation of this method is already complete. |
| 1504 | bool CompileBroker::compilation_is_complete(const methodHandle& method, |
| 1505 | int osr_bci, |
| 1506 | int comp_level) { |
| 1507 | bool is_osr = (osr_bci != standard_entry_bci); |
| 1508 | if (is_osr) { |
| 1509 | if (method->is_not_osr_compilable(comp_level)) { |
| 1510 | return true; |
| 1511 | } else { |
| 1512 | nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
| 1513 | return (result != NULL__null); |
| 1514 | } |
| 1515 | } else { |
| 1516 | if (method->is_not_compilable(comp_level)) { |
| 1517 | return true; |
| 1518 | } else { |
| 1519 | CompiledMethod* result = method->code(); |
| 1520 | if (result == NULL__null) return false; |
| 1521 | return comp_level == result->comp_level(); |
| 1522 | } |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | |
| 1527 | /** |
| 1528 | * See if this compilation is already requested. |
| 1529 | * |
| 1530 | * Implementation note: there is only a single "is in queue" bit |
| 1531 | * for each method. This means that the check below is overly |
| 1532 | * conservative in the sense that an osr compilation in the queue |
| 1533 | * will block a normal compilation from entering the queue (and vice |
| 1534 | * versa). This can be remedied by a full queue search to disambiguate |
| 1535 | * cases. If it is deemed profitable, this may be done. |
| 1536 | */ |
| 1537 | bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { |
| 1538 | return method->queued_for_compilation(); |
| 1539 | } |
| 1540 | |
| 1541 | // ------------------------------------------------------------------ |
| 1542 | // CompileBroker::compilation_is_prohibited |
| 1543 | // |
| 1544 | // See if this compilation is not allowed. |
| 1545 | bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { |
| 1546 | bool is_native = method->is_native(); |
| 1547 | // Some compilers may not support the compilation of natives. |
| 1548 | AbstractCompiler *comp = compiler(comp_level); |
| 1549 | if (is_native && (!CICompileNatives || comp == NULL__null)) { |
| 1550 | method->set_not_compilable_quietly("native methods not supported", comp_level); |
| 1551 | return true; |
| 1552 | } |
| 1553 | |
| 1554 | bool is_osr = (osr_bci != standard_entry_bci); |
| 1555 | // Some compilers may not support on stack replacement. |
| 1556 | if (is_osr && (!CICompileOSR || comp == NULL__null)) { |
| 1557 | method->set_not_osr_compilable("OSR not supported", comp_level); |
| 1558 | return true; |
| 1559 | } |
| 1560 | |
| 1561 | // The method may be explicitly excluded by the user. |
| 1562 | double scale; |
| 1563 | if (excluded || (CompilerOracle::has_option_value(method, CompileCommand::CompileThresholdScaling, scale) && scale == 0)) { |
| 1564 | bool quietly = CompilerOracle::be_quiet(); |
| 1565 | if (PrintCompilation && !quietly) { |
| 1566 | // This does not happen quietly... |
| 1567 | ResourceMark rm; |
| 1568 | tty->print("### Excluding %s:%s", |
| 1569 | method->is_native() ? "generation of native wrapper" : "compile", |
| 1570 | (method->is_static() ? " static" : "")); |
| 1571 | method->print_short_name(tty); |
| 1572 | tty->cr(); |
| 1573 | } |
| 1574 | method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly); |
| 1575 | } |
| 1576 | |
| 1577 | return false; |
| 1578 | } |
| 1579 | |
| 1580 | /** |
| 1581 | * Generate serialized IDs for compilation requests. If certain debugging flags are used |
| 1582 | * and the ID is not within the specified range, the method is not compiled and 0 is returned. |
| 1583 | * The function also allows to generate separate compilation IDs for OSR compilations. |
| 1584 | */ |
| 1585 | int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { |
| 1586 | #ifdef ASSERT1 |
| 1587 | bool is_osr = (osr_bci != standard_entry_bci); |
| 1588 | int id; |
| 1589 | if (method->is_native()) { |
| 1590 | assert(!is_osr, "can't be osr")do { if (!(!is_osr)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1590, "assert(" "!is_osr" ") failed", "can't be osr"); ::breakpoint (); } } while (0); |
| 1591 | // Adapters, native wrappers and method handle intrinsics |
| 1592 | // should be generated always. |
| 1593 | return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1); |
| 1594 | } else if (CICountOSR && is_osr) { |
| 1595 | id = Atomic::add(&_osr_compilation_id, 1); |
| 1596 | if (CIStartOSR <= id && id < CIStopOSR) { |
| 1597 | return id; |
| 1598 | } |
| 1599 | } else { |
| 1600 | id = Atomic::add(&_compilation_id, 1); |
| 1601 | if (CIStart <= id && id < CIStop) { |
| 1602 | return id; |
| 1603 | } |
| 1604 | } |
| 1605 | |
| 1606 | // Method was not in the appropriate compilation range. |
| 1607 | method->set_not_compilable_quietly("Not in requested compile id range"); |
| 1608 | return 0; |
| 1609 | #else |
| 1610 | // CICountOSR is a develop flag and set to 'false' by default. In a product built, |
| 1611 | // only _compilation_id is incremented. |
| 1612 | return Atomic::add(&_compilation_id, 1); |
| 1613 | #endif |
| 1614 | } |
| 1615 | |
| 1616 | // ------------------------------------------------------------------ |
| 1617 | // CompileBroker::assign_compile_id_unlocked |
| 1618 | // |
| 1619 | // Public wrapper for assign_compile_id that acquires the needed locks |
| 1620 | uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { |
| 1621 | MutexLocker locker(thread, MethodCompileQueue_lock); |
| 1622 | return assign_compile_id(method, osr_bci); |
| 1623 | } |
| 1624 | |
| 1625 | // ------------------------------------------------------------------ |
| 1626 | // CompileBroker::create_compile_task |
| 1627 | // |
| 1628 | // Create a CompileTask object representing the current request for |
| 1629 | // compilation. Add this task to the queue. |
| 1630 | CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, |
| 1631 | int compile_id, |
| 1632 | const methodHandle& method, |
| 1633 | int osr_bci, |
| 1634 | int comp_level, |
| 1635 | const methodHandle& hot_method, |
| 1636 | int hot_count, |
| 1637 | CompileTask::CompileReason compile_reason, |
| 1638 | bool blocking) { |
| 1639 | CompileTask* new_task = CompileTask::allocate(); |
| 1640 | new_task->initialize(compile_id, method, osr_bci, comp_level, |
| 1641 | hot_method, hot_count, compile_reason, |
| 1642 | blocking); |
| 1643 | queue->add(new_task); |
| 1644 | return new_task; |
| 1645 | } |
| 1646 | |
| 1647 | #if INCLUDE_JVMCI1 |
| 1648 | // The number of milliseconds to wait before checking if |
| 1649 | // JVMCI compilation has made progress. |
| 1650 | static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; |
| 1651 | |
| 1652 | // The number of JVMCI compilation progress checks that must fail |
| 1653 | // before unblocking a thread waiting for a blocking compilation. |
| 1654 | static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; |
| 1655 | |
| 1656 | /** |
| 1657 | * Waits for a JVMCI compiler to complete a given task. This thread |
| 1658 | * waits until either the task completes or it sees no JVMCI compilation |
| 1659 | * progress for N consecutive milliseconds where N is |
| 1660 | * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * |
| 1661 | * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. |
| 1662 | * |
| 1663 | * @return true if this thread needs to free/recycle the task |
| 1664 | */ |
| 1665 | bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { |
| 1666 | assert(UseJVMCICompiler, "sanity")do { if (!(UseJVMCICompiler)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1666, "assert(" "UseJVMCICompiler" ") failed", "sanity"); :: breakpoint(); } } while (0); |
| 1667 | MonitorLocker ml(thread, task->lock()); |
| 1668 | int progress_wait_attempts = 0; |
| 1669 | jint thread_jvmci_compilation_ticks = 0; |
| 1670 | jint global_jvmci_compilation_ticks = jvmci->global_compilation_ticks(); |
| 1671 | while (!task->is_complete() && !is_compilation_disabled_forever() && |
| 1672 | ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { |
| 1673 | JVMCICompileState* jvmci_compile_state = task->blocking_jvmci_compile_state(); |
| 1674 | |
| 1675 | bool progress; |
| 1676 | if (jvmci_compile_state != NULL__null) { |
| 1677 | jint ticks = jvmci_compile_state->compilation_ticks(); |
| 1678 | progress = (ticks - thread_jvmci_compilation_ticks) != 0; |
| 1679 | JVMCI_event_1if (JVMCITraceLevel < 1 && JVMCIEventLogLevel < 1) ; else ::JVMCI::event1("waiting on compilation %d [ticks=%d]", task->compile_id(), ticks); |
| 1680 | thread_jvmci_compilation_ticks = ticks; |
| 1681 | } else { |
| 1682 | // Still waiting on JVMCI compiler queue. This thread may be holding a lock |
| 1683 | // that all JVMCI compiler threads are blocked on. We use the global JVMCI |
| 1684 | // compilation ticks to determine whether JVMCI compilation |
| 1685 | // is still making progress through the JVMCI compiler queue. |
| 1686 | jint ticks = jvmci->global_compilation_ticks(); |
| 1687 | progress = (ticks - global_jvmci_compilation_ticks) != 0; |
| 1688 | JVMCI_event_1if (JVMCITraceLevel < 1 && JVMCIEventLogLevel < 1) ; else ::JVMCI::event1("waiting on compilation %d to be queued [ticks=%d]", task->compile_id(), ticks); |
| 1689 | global_jvmci_compilation_ticks = ticks; |
| 1690 | } |
| 1691 | |
| 1692 | if (!progress) { |
| 1693 | if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { |
| 1694 | if (PrintCompilation) { |
| 1695 | task->print(tty, "wait for blocking compilation timed out"); |
| 1696 | } |
| 1697 | JVMCI_event_1if (JVMCITraceLevel < 1 && JVMCIEventLogLevel < 1) ; else ::JVMCI::event1("waiting on compilation %d timed out", task->compile_id()); |
| 1698 | break; |
| 1699 | } |
| 1700 | } else { |
| 1701 | progress_wait_attempts = 0; |
| 1702 | } |
| 1703 | } |
| 1704 | task->clear_waiter(); |
| 1705 | return task->is_complete(); |
| 1706 | } |
| 1707 | #endif |
| 1708 | |
| 1709 | /** |
| 1710 | * Wait for the compilation task to complete. |
| 1711 | */ |
| 1712 | void CompileBroker::wait_for_completion(CompileTask* task) { |
| 1713 | if (CIPrintCompileQueue) { |
| 1714 | ttyLocker ttyl; |
| 1715 | tty->print_cr("BLOCKING FOR COMPILE"); |
| 1716 | } |
| 1717 | |
| 1718 | assert(task->is_blocking(), "can only wait on blocking task")do { if (!(task->is_blocking())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1718, "assert(" "task->is_blocking()" ") failed", "can only wait on blocking task" ); ::breakpoint(); } } while (0); |
| 1719 | |
| 1720 | JavaThread* thread = JavaThread::current(); |
| 1721 | |
| 1722 | methodHandle method(thread, task->method()); |
| 1723 | bool free_task; |
| 1724 | #if INCLUDE_JVMCI1 |
| 1725 | AbstractCompiler* comp = compiler(task->comp_level()); |
| 1726 | if (comp->is_jvmci() && !task->should_wait_for_compilation()) { |
| 1727 | // It may return before compilation is completed. |
| 1728 | free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); |
| 1729 | } else |
| 1730 | #endif |
| 1731 | { |
| 1732 | MonitorLocker ml(thread, task->lock()); |
| 1733 | free_task = true; |
| 1734 | while (!task->is_complete() && !is_compilation_disabled_forever()) { |
| 1735 | ml.wait(); |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | if (free_task) { |
| 1740 | if (is_compilation_disabled_forever()) { |
| 1741 | CompileTask::free(task); |
| 1742 | return; |
| 1743 | } |
| 1744 | |
| 1745 | // It is harmless to check this status without the lock, because |
| 1746 | // completion is a stable property (until the task object is recycled). |
| 1747 | assert(task->is_complete(), "Compilation should have completed")do { if (!(task->is_complete())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1747, "assert(" "task->is_complete()" ") failed", "Compilation should have completed" ); ::breakpoint(); } } while (0); |
| 1748 | assert(task->code_handle() == NULL, "must be reset")do { if (!(task->code_handle() == __null)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1748, "assert(" "task->code_handle() == __null" ") failed" , "must be reset"); ::breakpoint(); } } while (0); |
| 1749 | |
| 1750 | // By convention, the waiter is responsible for recycling a |
| 1751 | // blocking CompileTask. Since there is only one waiter ever |
| 1752 | // waiting on a CompileTask, we know that no one else will |
| 1753 | // be using this CompileTask; we can free it. |
| 1754 | CompileTask::free(task); |
| 1755 | } |
| 1756 | } |
| 1757 | |
| 1758 | /** |
| 1759 | * Initialize compiler thread(s) + compiler object(s). The postcondition |
| 1760 | * of this function is that the compiler runtimes are initialized and that |
| 1761 | * compiler threads can start compiling. |
| 1762 | */ |
| 1763 | bool CompileBroker::init_compiler_runtime() { |
| 1764 | CompilerThread* thread = CompilerThread::current(); |
| 1765 | AbstractCompiler* comp = thread->compiler(); |
| 1766 | // Final sanity check - the compiler object must exist |
| 1767 | guarantee(comp != NULL, "Compiler object must exist")do { if (!(comp != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1767, "guarantee(" "comp != NULL" ") failed", "Compiler object must exist" ); ::breakpoint(); } } while (0); |
| 1768 | |
| 1769 | { |
| 1770 | // Must switch to native to allocate ci_env |
| 1771 | ThreadToNativeFromVM ttn(thread); |
| 1772 | ciEnv ci_env((CompileTask*)NULL__null); |
| 1773 | // Cache Jvmti state |
| 1774 | ci_env.cache_jvmti_state(); |
| 1775 | // Cache DTrace flags |
| 1776 | ci_env.cache_dtrace_flags(); |
| 1777 | |
| 1778 | // Switch back to VM state to do compiler initialization |
| 1779 | ThreadInVMfromNative tv(thread); |
| 1780 | |
| 1781 | // Perform per-thread and global initializations |
| 1782 | comp->initialize(); |
| 1783 | } |
| 1784 | |
| 1785 | if (comp->is_failed()) { |
| 1786 | disable_compilation_forever(); |
| 1787 | // If compiler initialization failed, no compiler thread that is specific to a |
| 1788 | // particular compiler runtime will ever start to compile methods. |
| 1789 | shutdown_compiler_runtime(comp, thread); |
| 1790 | return false; |
| 1791 | } |
| 1792 | |
| 1793 | // C1 specific check |
| 1794 | if (comp->is_c1() && (thread->get_buffer_blob() == NULL__null)) { |
| 1795 | warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); |
| 1796 | return false; |
| 1797 | } |
| 1798 | |
| 1799 | return true; |
| 1800 | } |
| 1801 | |
| 1802 | /** |
| 1803 | * If C1 and/or C2 initialization failed, we shut down all compilation. |
| 1804 | * We do this to keep things simple. This can be changed if it ever turns |
| 1805 | * out to be a problem. |
| 1806 | */ |
| 1807 | void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { |
| 1808 | // Free buffer blob, if allocated |
| 1809 | if (thread->get_buffer_blob() != NULL__null) { |
| 1810 | MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 1811 | CodeCache::free(thread->get_buffer_blob()); |
| 1812 | } |
| 1813 | |
| 1814 | if (comp->should_perform_shutdown()) { |
| 1815 | // There are two reasons for shutting down the compiler |
| 1816 | // 1) compiler runtime initialization failed |
| 1817 | // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing |
| 1818 | warning("%s initialization failed. Shutting down all compilers", comp->name()); |
| 1819 | |
| 1820 | // Only one thread per compiler runtime object enters here |
| 1821 | // Set state to shut down |
| 1822 | comp->set_shut_down(); |
| 1823 | |
| 1824 | // Delete all queued compilation tasks to make compiler threads exit faster. |
| 1825 | if (_c1_compile_queue != NULL__null) { |
| 1826 | _c1_compile_queue->free_all(); |
| 1827 | } |
| 1828 | |
| 1829 | if (_c2_compile_queue != NULL__null) { |
| 1830 | _c2_compile_queue->free_all(); |
| 1831 | } |
| 1832 | |
| 1833 | // Set flags so that we continue execution with using interpreter only. |
| 1834 | UseCompiler = false; |
| 1835 | UseInterpreter = true; |
| 1836 | |
| 1837 | // We could delete compiler runtimes also. However, there are references to |
| 1838 | // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then |
| 1839 | // fail. This can be done later if necessary. |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | /** |
| 1844 | * Helper function to create new or reuse old CompileLog. |
| 1845 | */ |
| 1846 | CompileLog* CompileBroker::get_log(CompilerThread* ct) { |
| 1847 | if (!LogCompilation) return NULL__null; |
| 1848 | |
| 1849 | AbstractCompiler *compiler = ct->compiler(); |
| 1850 | bool c1 = compiler->is_c1(); |
| 1851 | jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; |
| 1852 | assert(compiler_objects != NULL, "must be initialized at this point")do { if (!(compiler_objects != __null)) { (*g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1852, "assert(" "compiler_objects != __null" ") failed", "must be initialized at this point" ); ::breakpoint(); } } while (0); |
| 1853 | CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; |
| 1854 | assert(logs != NULL, "must be initialized at this point")do { if (!(logs != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1854, "assert(" "logs != __null" ") failed", "must be initialized at this point" ); ::breakpoint(); } } while (0); |
| 1855 | int count = c1 ? _c1_count : _c2_count; |
| 1856 | |
| 1857 | // Find Compiler number by its threadObj. |
| 1858 | oop compiler_obj = ct->threadObj(); |
| 1859 | int compiler_number = 0; |
| 1860 | bool found = false; |
| 1861 | for (; compiler_number < count; compiler_number++) { |
| 1862 | if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) { |
| 1863 | found = true; |
| 1864 | break; |
| 1865 | } |
| 1866 | } |
| 1867 | assert(found, "Compiler must exist at this point")do { if (!(found)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1867, "assert(" "found" ") failed", "Compiler must exist at this point" ); ::breakpoint(); } } while (0); |
| 1868 | |
| 1869 | // Determine pointer for this thread's log. |
| 1870 | CompileLog** log_ptr = &logs[compiler_number]; |
| 1871 | |
| 1872 | // Return old one if it exists. |
| 1873 | CompileLog* log = *log_ptr; |
| 1874 | if (log != NULL__null) { |
| 1875 | ct->init_log(log); |
| 1876 | return log; |
| 1877 | } |
| 1878 | |
| 1879 | // Create a new one and remember it. |
| 1880 | init_compiler_thread_log(); |
| 1881 | log = ct->log(); |
| 1882 | *log_ptr = log; |
| 1883 | return log; |
| 1884 | } |
| 1885 | |
| 1886 | // ------------------------------------------------------------------ |
| 1887 | // CompileBroker::compiler_thread_loop |
| 1888 | // |
| 1889 | // The main loop run by a CompilerThread. |
| 1890 | void CompileBroker::compiler_thread_loop() { |
| 1891 | CompilerThread* thread = CompilerThread::current(); |
| 1892 | CompileQueue* queue = thread->queue(); |
| 1893 | // For the thread that initializes the ciObjectFactory |
| 1894 | // this resource mark holds all the shared objects |
| 1895 | ResourceMark rm; |
| 1896 | |
| 1897 | // First thread to get here will initialize the compiler interface |
| 1898 | |
| 1899 | { |
| 1900 | ASSERT_IN_VMdo { if (!(ciEnv::is_in_vm())) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1900, "assert(" "ciEnv::is_in_vm()" ") failed", "must be in vm state" ); ::breakpoint(); } } while (0);; |
| 1901 | MutexLocker only_one (thread, CompileThread_lock); |
| 1902 | if (!ciObjectFactory::is_initialized()) { |
| 1903 | ciObjectFactory::initialize(); |
| 1904 | } |
| 1905 | } |
| 1906 | |
| 1907 | // Open a log. |
| 1908 | CompileLog* log = get_log(thread); |
| 1909 | if (log != NULL__null) { |
| 1910 | log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT"%" "l" "u" "' process='%d'", |
| 1911 | thread->name(), |
| 1912 | os::current_thread_id(), |
| 1913 | os::current_process_id()); |
| 1914 | log->stamp(); |
| 1915 | log->end_elem(); |
| 1916 | } |
| 1917 | |
| 1918 | // If compiler thread/runtime initialization fails, exit the compiler thread |
| 1919 | if (!init_compiler_runtime()) { |
| 1920 | return; |
| 1921 | } |
| 1922 | |
| 1923 | thread->start_idle_timer(); |
| 1924 | |
| 1925 | // Poll for new compilation tasks as long as the JVM runs. Compilation |
| 1926 | // should only be disabled if something went wrong while initializing the |
| 1927 | // compiler runtimes. This, in turn, should not happen. The only known case |
| 1928 | // when compiler runtime initialization fails is if there is not enough free |
| 1929 | // space in the code cache to generate the necessary stubs, etc. |
| 1930 | while (!is_compilation_disabled_forever()) { |
| 1931 | // We need this HandleMark to avoid leaking VM handles. |
| 1932 | HandleMark hm(thread); |
| 1933 | |
| 1934 | CompileTask* task = queue->get(); |
| 1935 | if (task == NULL__null) { |
| 1936 | if (UseDynamicNumberOfCompilerThreads) { |
| 1937 | // Access compiler_count under lock to enforce consistency. |
| 1938 | MutexLocker only_one(CompileThread_lock); |
| 1939 | if (can_remove(thread, true)) { |
| 1940 | if (TraceCompilerThreads) { |
| 1941 | tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT"%" "l" "d" " ms idle time", |
| 1942 | thread->name(), thread->idle_time_millis()); |
| 1943 | } |
| 1944 | // Free buffer blob, if allocated |
| 1945 | if (thread->get_buffer_blob() != NULL__null) { |
| 1946 | MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 1947 | CodeCache::free(thread->get_buffer_blob()); |
| 1948 | } |
| 1949 | return; // Stop this thread. |
| 1950 | } |
| 1951 | } |
| 1952 | } else { |
| 1953 | // Assign the task to the current thread. Mark this compilation |
| 1954 | // thread as active for the profiler. |
| 1955 | // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition |
| 1956 | // occurs after fetching the compile task off the queue. |
| 1957 | CompileTaskWrapper ctw(task); |
| 1958 | nmethodLocker result_handle; // (handle for the nmethod produced by this task) |
| 1959 | task->set_code_handle(&result_handle); |
| 1960 | methodHandle method(thread, task->method()); |
| 1961 | |
| 1962 | // Never compile a method if breakpoints are present in it |
| 1963 | if (method()->number_of_breakpoints() == 0) { |
| 1964 | // Compile the method. |
| 1965 | if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
| 1966 | invoke_compiler_on_method(task); |
| 1967 | thread->start_idle_timer(); |
| 1968 | } else { |
| 1969 | // After compilation is disabled, remove remaining methods from queue |
| 1970 | method->clear_queued_for_compilation(); |
| 1971 | task->set_failure_reason("compilation is disabled"); |
| 1972 | } |
| 1973 | } |
| 1974 | |
| 1975 | if (UseDynamicNumberOfCompilerThreads) { |
| 1976 | possibly_add_compiler_threads(thread); |
| 1977 | assert(!thread->has_pending_exception(), "should have been handled")do { if (!(!thread->has_pending_exception())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 1977, "assert(" "!thread->has_pending_exception()" ") failed" , "should have been handled"); ::breakpoint(); } } while (0); |
| 1978 | } |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | // Shut down compiler runtime |
| 1983 | shutdown_compiler_runtime(thread->compiler(), thread); |
| 1984 | } |
| 1985 | |
| 1986 | // ------------------------------------------------------------------ |
| 1987 | // CompileBroker::init_compiler_thread_log |
| 1988 | // |
| 1989 | // Set up state required by +LogCompilation. |
| 1990 | void CompileBroker::init_compiler_thread_log() { |
| 1991 | CompilerThread* thread = CompilerThread::current(); |
| 1992 | char file_name[4*K]; |
| 1993 | FILE* fp = NULL__null; |
| 1994 | intx thread_id = os::current_thread_id(); |
| 1995 | for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { |
| 1996 | const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL__null); |
| 1997 | if (dir == NULL__null) { |
| 1998 | jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT"%" "l" "u" "_pid%u.log", |
| 1999 | thread_id, os::current_process_id()); |
| 2000 | } else { |
| 2001 | jio_snprintf(file_name, sizeof(file_name), |
| 2002 | "%s%shs_c" UINTX_FORMAT"%" "l" "u" "_pid%u.log", dir, |
| 2003 | os::file_separator(), thread_id, os::current_process_id()); |
| 2004 | } |
| 2005 | |
| 2006 | fp = fopen(file_name, "wt"); |
| 2007 | if (fp != NULL__null) { |
| 2008 | if (LogCompilation && Verbose) { |
| 2009 | tty->print_cr("Opening compilation log %s", file_name); |
| 2010 | } |
| 2011 | CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); |
| 2012 | if (log == NULL__null) { |
| 2013 | fclose(fp); |
| 2014 | return; |
| 2015 | } |
| 2016 | thread->init_log(log); |
| 2017 | |
| 2018 | if (xtty != NULL__null) { |
| 2019 | ttyLocker ttyl; |
| 2020 | // Record any per thread log files |
| 2021 | xtty->elem("thread_logfile thread='" INTX_FORMAT"%" "l" "d" "' filename='%s'", thread_id, file_name); |
| 2022 | } |
| 2023 | return; |
| 2024 | } |
| 2025 | } |
| 2026 | warning("Cannot open log file: %s", file_name); |
| 2027 | } |
| 2028 | |
| 2029 | void CompileBroker::log_metaspace_failure() { |
| 2030 | const char* message = "some methods may not be compiled because metaspace " |
| 2031 | "is out of memory"; |
| 2032 | if (_compilation_log != NULL__null) { |
| 2033 | _compilation_log->log_metaspace_failure(message); |
| 2034 | } |
| 2035 | if (PrintCompilation) { |
| 2036 | tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); |
| 2037 | } |
| 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | // ------------------------------------------------------------------ |
| 2042 | // CompileBroker::set_should_block |
| 2043 | // |
| 2044 | // Set _should_block. |
| 2045 | // Call this from the VM, with Threads_lock held and a safepoint requested. |
| 2046 | void CompileBroker::set_should_block() { |
| 2047 | assert(Threads_lock->owner() == Thread::current(), "must have threads lock")do { if (!(Threads_lock->owner() == Thread::current())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2047, "assert(" "Threads_lock->owner() == Thread::current()" ") failed", "must have threads lock"); ::breakpoint(); } } while (0); |
| 2048 | assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already")do { if (!(SafepointSynchronize::is_at_safepoint())) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2048, "assert(" "SafepointSynchronize::is_at_safepoint()" ") failed" , "must be at a safepoint already"); ::breakpoint(); } } while (0); |
| 2049 | #ifndef PRODUCT |
| 2050 | if (PrintCompilation && (Verbose || WizardMode)) |
| 2051 | tty->print_cr("notifying compiler thread pool to block"); |
| 2052 | #endif |
| 2053 | _should_block = true; |
| 2054 | } |
| 2055 | |
| 2056 | // ------------------------------------------------------------------ |
| 2057 | // CompileBroker::maybe_block |
| 2058 | // |
| 2059 | // Call this from the compiler at convenient points, to poll for _should_block. |
| 2060 | void CompileBroker::maybe_block() { |
| 2061 | if (_should_block) { |
| 2062 | #ifndef PRODUCT |
| 2063 | if (PrintCompilation && (Verbose || WizardMode)) |
| 2064 | tty->print_cr("compiler thread " INTPTR_FORMAT"0x%016" "l" "x" " poll detects block request", p2i(Thread::current())); |
| 2065 | #endif |
| 2066 | ThreadInVMfromNative tivfn(JavaThread::current()); |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | // wrapper for CodeCache::print_summary() |
| 2071 | static void codecache_print(bool detailed) |
| 2072 | { |
| 2073 | ResourceMark rm; |
| 2074 | stringStream s; |
| 2075 | // Dump code cache into a buffer before locking the tty, |
| 2076 | { |
| 2077 | MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 2078 | CodeCache::print_summary(&s, detailed); |
| 2079 | } |
| 2080 | ttyLocker ttyl; |
| 2081 | tty->print("%s", s.as_string()); |
| 2082 | } |
| 2083 | |
| 2084 | // wrapper for CodeCache::print_summary() using outputStream |
| 2085 | static void codecache_print(outputStream* out, bool detailed) { |
| 2086 | ResourceMark rm; |
| 2087 | stringStream s; |
| 2088 | |
| 2089 | // Dump code cache into a buffer |
| 2090 | { |
| 2091 | MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| 2092 | CodeCache::print_summary(&s, detailed); |
| 2093 | } |
| 2094 | |
| 2095 | char* remaining_log = s.as_string(); |
| 2096 | while (*remaining_log != '\0') { |
| 2097 | char* eol = strchr(remaining_log, '\n'); |
| 2098 | if (eol == NULL__null) { |
| 2099 | out->print_cr("%s", remaining_log); |
| 2100 | remaining_log = remaining_log + strlen(remaining_log); |
| 2101 | } else { |
| 2102 | *eol = '\0'; |
| 2103 | out->print_cr("%s", remaining_log); |
| 2104 | remaining_log = eol + 1; |
| 2105 | } |
| 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env, |
| 2110 | int compilable, const char* failure_reason) { |
| 2111 | if (success) { |
| 2112 | task->mark_success(); |
| 2113 | if (ci_env != NULL__null) { |
| 2114 | task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); |
| 2115 | } |
| 2116 | if (_compilation_log != NULL__null) { |
| 2117 | nmethod* code = task->code(); |
| 2118 | if (code != NULL__null) { |
| 2119 | _compilation_log->log_nmethod(thread, code); |
| 2120 | } |
| 2121 | } |
| 2122 | } else if (AbortVMOnCompilationFailure) { |
| 2123 | if (compilable == ciEnv::MethodCompilable_not_at_tier) { |
| 2124 | fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason)do { (*g_assert_poison) = 'X';; report_fatal(INTERNAL_ERROR, "/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2124, "Not compilable at tier %d: %s", task->comp_level( ), failure_reason); ::breakpoint(); } while (0); |
| 2125 | } |
| 2126 | if (compilable == ciEnv::MethodCompilable_never) { |
| 2127 | fatal("Never compilable: %s", failure_reason)do { (*g_assert_poison) = 'X';; report_fatal(INTERNAL_ERROR, "/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2127, "Never compilable: %s", failure_reason); ::breakpoint (); } while (0); |
| 2128 | } |
| 2129 | } |
| 2130 | } |
| 2131 | |
| 2132 | static void post_compilation_event(EventCompilation& event, CompileTask* task) { |
| 2133 | assert(task != NULL, "invariant")do { if (!(task != __null)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2133, "assert(" "task != __null" ") failed", "invariant"); :: breakpoint(); } } while (0); |
| 2134 | CompilerEvent::CompilationEvent::post(event, |
| 2135 | task->compile_id(), |
| 2136 | task->compiler()->type(), |
| 2137 | task->method(), |
| 2138 | task->comp_level(), |
| 2139 | task->is_success(), |
| 2140 | task->osr_bci() != CompileBroker::standard_entry_bci, |
| 2141 | (task->code() == NULL__null) ? 0 : task->code()->total_size(), |
| 2142 | task->num_inlined_bytecodes()); |
| 2143 | } |
| 2144 | |
| 2145 | int DirectivesStack::_depth = 0; |
| 2146 | CompilerDirectives* DirectivesStack::_top = NULL__null; |
| 2147 | CompilerDirectives* DirectivesStack::_bottom = NULL__null; |
| 2148 | |
| 2149 | // ------------------------------------------------------------------ |
| 2150 | // CompileBroker::invoke_compiler_on_method |
| 2151 | // |
| 2152 | // Compile a method. |
| 2153 | // |
| 2154 | void CompileBroker::invoke_compiler_on_method(CompileTask* task) { |
| 2155 | task->print_ul(); |
| 2156 | if (PrintCompilation) { |
| 2157 | ResourceMark rm; |
| 2158 | task->print_tty(); |
| 2159 | } |
| 2160 | elapsedTimer time; |
| 2161 | |
| 2162 | CompilerThread* thread = CompilerThread::current(); |
| 2163 | ResourceMark rm(thread); |
| 2164 | |
| 2165 | if (LogEvents) { |
| 2166 | _compilation_log->log_compile(thread, task); |
| 2167 | } |
| 2168 | |
| 2169 | // Common flags. |
| 2170 | uint compile_id = task->compile_id(); |
| 2171 | int osr_bci = task->osr_bci(); |
| 2172 | bool is_osr = (osr_bci != standard_entry_bci); |
| 2173 | bool should_log = (thread->log() != NULL__null); |
| 2174 | bool should_break = false; |
| 2175 | const int task_level = task->comp_level(); |
| 2176 | AbstractCompiler* comp = task->compiler(); |
| 2177 | |
| 2178 | DirectiveSet* directive; |
| 2179 | { |
| 2180 | // create the handle inside it's own block so it can't |
| 2181 | // accidentally be referenced once the thread transitions to |
| 2182 | // native. The NoHandleMark before the transition should catch |
| 2183 | // any cases where this occurs in the future. |
| 2184 | methodHandle method(thread, task->method()); |
| 2185 | assert(!method->is_native(), "no longer compile natives")do { if (!(!method->is_native())) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2185, "assert(" "!method->is_native()" ") failed", "no longer compile natives" ); ::breakpoint(); } } while (0); |
| 2186 | |
| 2187 | // Look up matching directives |
| 2188 | directive = DirectivesStack::getMatchingDirective(method, comp); |
| 2189 | |
| 2190 | // Update compile information when using perfdata. |
| 2191 | if (UsePerfData) { |
| 2192 | update_compile_perf_data(thread, method, is_osr); |
| 2193 | } |
| 2194 | |
| 2195 | DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); |
| 2196 | } |
| 2197 | |
| 2198 | should_break = directive->BreakAtCompileOption || task->check_break_at_flags(); |
| 2199 | if (should_log && !directive->LogOption) { |
| 2200 | should_log = false; |
| 2201 | } |
| 2202 | |
| 2203 | // Allocate a new set of JNI handles. |
| 2204 | JNIHandleMark jhm(thread); |
| 2205 | Method* target_handle = task->method(); |
| 2206 | int compilable = ciEnv::MethodCompilable; |
| 2207 | const char* failure_reason = NULL__null; |
| 2208 | bool failure_reason_on_C_heap = false; |
| 2209 | const char* retry_message = NULL__null; |
| 2210 | |
| 2211 | #if INCLUDE_JVMCI1 |
| 2212 | if (UseJVMCICompiler && comp != NULL__null && comp->is_jvmci()) { |
| 2213 | JVMCICompiler* jvmci = (JVMCICompiler*) comp; |
| 2214 | |
| 2215 | TraceTime t1("compilation", &time); |
| 2216 | EventCompilation event; |
| 2217 | JVMCICompileState compile_state(task, jvmci); |
| 2218 | JVMCIRuntime *runtime = NULL__null; |
| 2219 | |
| 2220 | if (JVMCI::in_shutdown()) { |
| 2221 | failure_reason = "in JVMCI shutdown"; |
| 2222 | retry_message = "not retryable"; |
| 2223 | compilable = ciEnv::MethodCompilable_never; |
| 2224 | } else if (compile_state.target_method_is_old()) { |
| 2225 | // Skip redefined methods |
| 2226 | failure_reason = "redefined method"; |
| 2227 | retry_message = "not retryable"; |
| 2228 | compilable = ciEnv::MethodCompilable_never; |
| 2229 | } else { |
| 2230 | JVMCIEnv env(thread, &compile_state, __FILE__"/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp", __LINE__2230); |
| 2231 | methodHandle method(thread, target_handle); |
| 2232 | runtime = env.runtime(); |
| 2233 | runtime->compile_method(&env, jvmci, method, osr_bci); |
| 2234 | |
| 2235 | failure_reason = compile_state.failure_reason(); |
| 2236 | failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap(); |
| 2237 | if (!compile_state.retryable()) { |
| 2238 | retry_message = "not retryable"; |
| 2239 | compilable = ciEnv::MethodCompilable_not_at_tier; |
| 2240 | } |
| 2241 | if (task->code() == NULL__null) { |
| 2242 | assert(failure_reason != NULL, "must specify failure_reason")do { if (!(failure_reason != __null)) { (*g_assert_poison) = 'X' ;; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2242, "assert(" "failure_reason != __null" ") failed", "must specify failure_reason" ); ::breakpoint(); } } while (0); |
| 2243 | } |
| 2244 | } |
| 2245 | post_compile(thread, task, task->code() != NULL__null, NULL__null, compilable, failure_reason); |
| 2246 | if (event.should_commit()) { |
| 2247 | post_compilation_event(event, task); |
| 2248 | } |
| 2249 | |
| 2250 | } else |
| 2251 | #endif // INCLUDE_JVMCI |
| 2252 | { |
| 2253 | NoHandleMark nhm; |
| 2254 | ThreadToNativeFromVM ttn(thread); |
| 2255 | |
| 2256 | ciEnv ci_env(task); |
| 2257 | if (should_break) { |
| 2258 | ci_env.set_break_at_compile(true); |
| 2259 | } |
| 2260 | if (should_log) { |
| 2261 | ci_env.set_log(thread->log()); |
| 2262 | } |
| 2263 | assert(thread->env() == &ci_env, "set by ci_env")do { if (!(thread->env() == &ci_env)) { (*g_assert_poison ) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2263, "assert(" "thread->env() == &ci_env" ") failed" , "set by ci_env"); ::breakpoint(); } } while (0); |
| 2264 | // The thread-env() field is cleared in ~CompileTaskWrapper. |
| 2265 | |
| 2266 | // Cache Jvmti state |
| 2267 | bool method_is_old = ci_env.cache_jvmti_state(); |
| 2268 | |
| 2269 | // Skip redefined methods |
| 2270 | if (method_is_old) { |
| 2271 | ci_env.record_method_not_compilable("redefined method", true); |
| 2272 | } |
| 2273 | |
| 2274 | // Cache DTrace flags |
| 2275 | ci_env.cache_dtrace_flags(); |
| 2276 | |
| 2277 | ciMethod* target = ci_env.get_method_from_handle(target_handle); |
| 2278 | |
| 2279 | TraceTime t1("compilation", &time); |
| 2280 | EventCompilation event; |
| 2281 | |
| 2282 | if (comp == NULL__null) { |
| 2283 | ci_env.record_method_not_compilable("no compiler"); |
| 2284 | } else if (!ci_env.failing()) { |
| 2285 | if (WhiteBoxAPI && WhiteBox::compilation_locked) { |
| 2286 | MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag); |
| 2287 | while (WhiteBox::compilation_locked) { |
| 2288 | locker.wait(); |
| 2289 | } |
| 2290 | } |
| 2291 | comp->compile_method(&ci_env, target, osr_bci, true, directive); |
| 2292 | |
| 2293 | /* Repeat compilation without installing code for profiling purposes */ |
| 2294 | int repeat_compilation_count = directive->RepeatCompilationOption; |
| 2295 | while (repeat_compilation_count > 0) { |
| 2296 | task->print_ul("NO CODE INSTALLED"); |
| 2297 | comp->compile_method(&ci_env, target, osr_bci, false , directive); |
| 2298 | repeat_compilation_count--; |
| 2299 | } |
| 2300 | } |
| 2301 | |
| 2302 | if (!ci_env.failing() && task->code() == NULL__null) { |
| 2303 | //assert(false, "compiler should always document failure"); |
| 2304 | // The compiler elected, without comment, not to register a result. |
| 2305 | // Do not attempt further compilations of this method. |
| 2306 | ci_env.record_method_not_compilable("compile failed"); |
| 2307 | } |
| 2308 | |
| 2309 | // Copy this bit to the enclosing block: |
| 2310 | compilable = ci_env.compilable(); |
| 2311 | |
| 2312 | if (ci_env.failing()) { |
| 2313 | failure_reason = ci_env.failure_reason(); |
| 2314 | retry_message = ci_env.retry_message(); |
| 2315 | ci_env.report_failure(failure_reason); |
| 2316 | } |
| 2317 | |
| 2318 | post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason); |
| 2319 | if (event.should_commit()) { |
| 2320 | post_compilation_event(event, task); |
| 2321 | } |
| 2322 | } |
| 2323 | |
| 2324 | if (failure_reason != NULL__null) { |
| 2325 | task->set_failure_reason(failure_reason, failure_reason_on_C_heap); |
| 2326 | if (_compilation_log != NULL__null) { |
| 2327 | _compilation_log->log_failure(thread, task, failure_reason, retry_message); |
| 2328 | } |
| 2329 | if (PrintCompilation) { |
| 2330 | FormatBufferResource msg = retry_message != NULL__null ? |
| 2331 | FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : |
| 2332 | FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); |
| 2333 | task->print(tty, msg); |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | methodHandle method(thread, task->method()); |
| 2338 | |
| 2339 | DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); |
| 2340 | |
| 2341 | collect_statistics(thread, time, task); |
| 2342 | |
| 2343 | nmethod* nm = task->code(); |
| 2344 | if (nm != NULL__null) { |
| 2345 | nm->maybe_print_nmethod(directive); |
| 2346 | } |
| 2347 | DirectivesStack::release(directive); |
| 2348 | |
| 2349 | if (PrintCompilation && PrintCompilation2) { |
| 2350 | tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp |
| 2351 | tty->print("%4d ", compile_id); // print compilation number |
| 2352 | tty->print("%s ", (is_osr ? "%" : " ")); |
| 2353 | if (task->code() != NULL__null) { |
| 2354 | tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); |
| 2355 | } |
| 2356 | tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); |
| 2357 | } |
| 2358 | |
| 2359 | Log(compilation, codecache)LogImpl<(LogTag::_compilation), (LogTag::_codecache), (LogTag ::__NO_TAG), (LogTag::__NO_TAG), (LogTag::__NO_TAG), (LogTag:: __NO_TAG)> log; |
| 2360 | if (log.is_debug()) { |
| 2361 | LogStream ls(log.debug()); |
| 2362 | codecache_print(&ls, /* detailed= */ false); |
| 2363 | } |
| 2364 | if (PrintCodeCacheOnCompilation) { |
| 2365 | codecache_print(/* detailed= */ false); |
| 2366 | } |
| 2367 | // Disable compilation, if required. |
| 2368 | switch (compilable) { |
| 2369 | case ciEnv::MethodCompilable_never: |
| 2370 | if (is_osr) |
| 2371 | method->set_not_osr_compilable_quietly("MethodCompilable_never"); |
| 2372 | else |
| 2373 | method->set_not_compilable_quietly("MethodCompilable_never"); |
| 2374 | break; |
| 2375 | case ciEnv::MethodCompilable_not_at_tier: |
| 2376 | if (is_osr) |
| 2377 | method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level); |
| 2378 | else |
| 2379 | method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level); |
| 2380 | break; |
| 2381 | } |
| 2382 | |
| 2383 | // Note that the queued_for_compilation bits are cleared without |
| 2384 | // protection of a mutex. [They were set by the requester thread, |
| 2385 | // when adding the task to the compile queue -- at which time the |
| 2386 | // compile queue lock was held. Subsequently, we acquired the compile |
| 2387 | // queue lock to get this task off the compile queue; thus (to belabour |
| 2388 | // the point somewhat) our clearing of the bits must be occurring |
| 2389 | // only after the setting of the bits. See also 14012000 above. |
| 2390 | method->clear_queued_for_compilation(); |
| 2391 | } |
| 2392 | |
| 2393 | /** |
| 2394 | * The CodeCache is full. Print warning and disable compilation. |
| 2395 | * Schedule code cache cleaning so compilation can continue later. |
| 2396 | * This function needs to be called only from CodeCache::allocate(), |
| 2397 | * since we currently handle a full code cache uniformly. |
| 2398 | */ |
| 2399 | void CompileBroker::handle_full_code_cache(int code_blob_type) { |
| 2400 | UseInterpreter = true; |
| 2401 | if (UseCompiler || AlwaysCompileLoopMethods ) { |
| 2402 | if (xtty != NULL__null) { |
| 2403 | ResourceMark rm; |
| 2404 | stringStream s; |
| 2405 | // Dump code cache state into a buffer before locking the tty, |
| 2406 | // because log_state() will use locks causing lock conflicts. |
| 2407 | CodeCache::log_state(&s); |
| 2408 | // Lock to prevent tearing |
| 2409 | ttyLocker ttyl; |
| 2410 | xtty->begin_elem("code_cache_full"); |
| 2411 | xtty->print("%s", s.as_string()); |
| 2412 | xtty->stamp(); |
| 2413 | xtty->end_elem(); |
| 2414 | } |
| 2415 | |
| 2416 | #ifndef PRODUCT |
| 2417 | if (ExitOnFullCodeCache) { |
| 2418 | codecache_print(/* detailed= */ true); |
| 2419 | before_exit(JavaThread::current()); |
| 2420 | exit_globals(); // will delete tty |
| 2421 | vm_direct_exit(1); |
| 2422 | } |
| 2423 | #endif |
| 2424 | if (UseCodeCacheFlushing) { |
| 2425 | // Since code cache is full, immediately stop new compiles |
| 2426 | if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { |
| 2427 | NMethodSweeper::log_sweep("disable_compiler"); |
| 2428 | } |
| 2429 | } else { |
| 2430 | disable_compilation_forever(); |
| 2431 | } |
| 2432 | |
| 2433 | CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); |
| 2434 | } |
| 2435 | } |
| 2436 | |
| 2437 | // ------------------------------------------------------------------ |
| 2438 | // CompileBroker::update_compile_perf_data |
| 2439 | // |
| 2440 | // Record this compilation for debugging purposes. |
| 2441 | void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) { |
| 2442 | ResourceMark rm; |
| 2443 | char* method_name = method->name()->as_C_string(); |
| 2444 | char current_method[CompilerCounters::cmname_buffer_length]; |
| 2445 | size_t maxLen = CompilerCounters::cmname_buffer_length; |
| 2446 | |
| 2447 | const char* class_name = method->method_holder()->name()->as_C_string(); |
| 2448 | |
| 2449 | size_t s1len = strlen(class_name); |
| 2450 | size_t s2len = strlen(method_name); |
| 2451 | |
| 2452 | // check if we need to truncate the string |
| 2453 | if (s1len + s2len + 2 > maxLen) { |
| 2454 | |
| 2455 | // the strategy is to lop off the leading characters of the |
| 2456 | // class name and the trailing characters of the method name. |
| 2457 | |
| 2458 | if (s2len + 2 > maxLen) { |
| 2459 | // lop of the entire class name string, let snprintf handle |
| 2460 | // truncation of the method name. |
| 2461 | class_name += s1len; // null string |
| 2462 | } |
| 2463 | else { |
| 2464 | // lop off the extra characters from the front of the class name |
| 2465 | class_name += ((s1len + s2len + 2) - maxLen); |
| 2466 | } |
| 2467 | } |
| 2468 | |
| 2469 | jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); |
| 2470 | |
| 2471 | int last_compile_type = normal_compile; |
| 2472 | if (CICountOSR && is_osr) { |
| 2473 | last_compile_type = osr_compile; |
| 2474 | } else if (CICountNative && method->is_native()) { |
| 2475 | last_compile_type = native_compile; |
| 2476 | } |
| 2477 | |
| 2478 | CompilerCounters* counters = thread->counters(); |
| 2479 | counters->set_current_method(current_method); |
| 2480 | counters->set_compile_type((jlong) last_compile_type); |
| 2481 | } |
| 2482 | |
| 2483 | // ------------------------------------------------------------------ |
| 2484 | // CompileBroker::collect_statistics |
| 2485 | // |
| 2486 | // Collect statistics about the compilation. |
| 2487 | |
| 2488 | void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { |
| 2489 | bool success = task->is_success(); |
| 2490 | methodHandle method (thread, task->method()); |
| 2491 | uint compile_id = task->compile_id(); |
| 2492 | bool is_osr = (task->osr_bci() != standard_entry_bci); |
| 2493 | const int comp_level = task->comp_level(); |
| 2494 | nmethod* code = task->code(); |
| 2495 | CompilerCounters* counters = thread->counters(); |
| 2496 | |
| 2497 | assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker")do { if (!(code == __null || code->is_locked_by_vm())) { ( *g_assert_poison) = 'X';; report_vm_error("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2497, "assert(" "code == __null || code->is_locked_by_vm()" ") failed", "will survive the MutexLocker"); ::breakpoint(); } } while (0); |
| 2498 | MutexLocker locker(CompileStatistics_lock); |
| 2499 | |
| 2500 | // _perf variables are production performance counters which are |
| 2501 | // updated regardless of the setting of the CITime and CITimeEach flags |
| 2502 | // |
| 2503 | |
| 2504 | // account all time, including bailouts and failures in this counter; |
| 2505 | // C1 and C2 counters are counting both successful and unsuccessful compiles |
| 2506 | _t_total_compilation.add(time); |
| 2507 | |
| 2508 | if (!success) { |
| 2509 | _total_bailout_count++; |
| 2510 | if (UsePerfData) { |
| 2511 | _perf_last_failed_method->set_value(counters->current_method()); |
| 2512 | _perf_last_failed_type->set_value(counters->compile_type()); |
| 2513 | _perf_total_bailout_count->inc(); |
| 2514 | } |
| 2515 | _t_bailedout_compilation.add(time); |
| 2516 | } else if (code == NULL__null) { |
| 2517 | if (UsePerfData) { |
| 2518 | _perf_last_invalidated_method->set_value(counters->current_method()); |
| 2519 | _perf_last_invalidated_type->set_value(counters->compile_type()); |
| 2520 | _perf_total_invalidated_count->inc(); |
| 2521 | } |
| 2522 | _total_invalidated_count++; |
| 2523 | _t_invalidated_compilation.add(time); |
| 2524 | } else { |
| 2525 | // Compilation succeeded |
| 2526 | |
| 2527 | // update compilation ticks - used by the implementation of |
| 2528 | // java.lang.management.CompilationMXBean |
| 2529 | _perf_total_compilation->inc(time.ticks()); |
| 2530 | _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; |
| 2531 | |
| 2532 | if (CITime) { |
| 2533 | int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); |
| 2534 | if (is_osr) { |
| 2535 | _t_osr_compilation.add(time); |
| 2536 | _sum_osr_bytes_compiled += bytes_compiled; |
| 2537 | } else { |
| 2538 | _t_standard_compilation.add(time); |
| 2539 | _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); |
| 2540 | } |
| 2541 | |
| 2542 | // Collect statistic per compilation level |
| 2543 | if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) { |
| 2544 | CompilerStatistics* stats = &_stats_per_level[comp_level-1]; |
| 2545 | if (is_osr) { |
| 2546 | stats->_osr.update(time, bytes_compiled); |
| 2547 | } else { |
| 2548 | stats->_standard.update(time, bytes_compiled); |
| 2549 | } |
| 2550 | stats->_nmethods_size += code->total_size(); |
| 2551 | stats->_nmethods_code_size += code->insts_size(); |
| 2552 | } else { |
| 2553 | assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level)do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2553, "assert(" "false" ") failed", "CompilerStatistics object does not exist for compilation level %d" , comp_level); ::breakpoint(); } } while (0); |
| 2554 | } |
| 2555 | |
| 2556 | // Collect statistic per compiler |
| 2557 | AbstractCompiler* comp = compiler(comp_level); |
| 2558 | if (comp) { |
| 2559 | CompilerStatistics* stats = comp->stats(); |
| 2560 | if (is_osr) { |
| 2561 | stats->_osr.update(time, bytes_compiled); |
| 2562 | } else { |
| 2563 | stats->_standard.update(time, bytes_compiled); |
| 2564 | } |
| 2565 | stats->_nmethods_size += code->total_size(); |
| 2566 | stats->_nmethods_code_size += code->insts_size(); |
| 2567 | } else { // if (!comp) |
| 2568 | assert(false, "Compiler object must exist")do { if (!(false)) { (*g_assert_poison) = 'X';; report_vm_error ("/home/daniel/Projects/java/jdk/src/hotspot/share/compiler/compileBroker.cpp" , 2568, "assert(" "false" ") failed", "Compiler object must exist" ); ::breakpoint(); } } while (0); |
| 2569 | } |
| 2570 | } |
| 2571 | |
| 2572 | if (UsePerfData) { |
| 2573 | // save the name of the last method compiled |
| 2574 | _perf_last_method->set_value(counters->current_method()); |
| 2575 | _perf_last_compile_type->set_value(counters->compile_type()); |
| 2576 | _perf_last_compile_size->set_value(method->code_size() + |
| 2577 | task->num_inlined_bytecodes()); |
| 2578 | if (is_osr) { |
| 2579 | _perf_osr_compilation->inc(time.ticks()); |
| 2580 | _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); |
| 2581 | } else { |
| 2582 | _perf_standard_compilation->inc(time.ticks()); |
| 2583 | _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); |
| 2584 | } |
| 2585 | } |
| 2586 | |
| 2587 | if (CITimeEach) { |
| 2588 | double compile_time = time.seconds(); |
| 2589 | double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time; |
| 2590 | tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)", |
| 2591 | compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); |
| 2592 | } |
| 2593 | |
| 2594 | // Collect counts of successful compilations |
| 2595 | _sum_nmethod_size += code->total_size(); |
| 2596 | _sum_nmethod_code_size += code->insts_size(); |
| 2597 | _total_compile_count++; |
| 2598 | |
| 2599 | if (UsePerfData) { |
| 2600 | _perf_sum_nmethod_size->inc( code->total_size()); |
| 2601 | _perf_sum_nmethod_code_size->inc(code->insts_size()); |
| 2602 | _perf_total_compile_count->inc(); |
| 2603 | } |
| 2604 | |
| 2605 | if (is_osr) { |
| 2606 | if (UsePerfData) _perf_total_osr_compile_count->inc(); |
| 2607 | _total_osr_compile_count++; |
| 2608 | } else { |
| 2609 | if (UsePerfData) _perf_total_standard_compile_count->inc(); |
| 2610 | _total_standard_compile_count++; |
| 2611 | } |
| 2612 | } |
| 2613 | // set the current method for the thread to null |
| 2614 | if (UsePerfData) counters->set_current_method(""); |
| 2615 | } |
| 2616 | |
| 2617 | const char* CompileBroker::compiler_name(int comp_level) { |
| 2618 | AbstractCompiler *comp = CompileBroker::compiler(comp_level); |
| 2619 | if (comp == NULL__null) { |
| 2620 | return "no compiler"; |
| 2621 | } else { |
| 2622 | return (comp->name()); |
| 2623 | } |
| 2624 | } |
| 2625 | |
| 2626 | jlong CompileBroker::total_compilation_ticks() { |
| 2627 | return _perf_total_compilation != NULL__null ? _perf_total_compilation->get_value() : 0; |
| 2628 | } |
| 2629 | |
| 2630 | void CompileBroker::print_times(const char* name, CompilerStatistics* stats) { |
| 2631 | tty->print_cr(" %s {speed: %6.3f bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}", |
| 2632 | name, stats->bytes_per_second(), |
| 2633 | stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, |
| 2634 | stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, |
| 2635 | stats->_nmethods_size, stats->_nmethods_code_size); |
| 2636 | } |
| 2637 | |
| 2638 | void CompileBroker::print_times(bool per_compiler, bool aggregate) { |
| 2639 | if (per_compiler) { |
| 2640 | if (aggregate) { |
| 2641 | tty->cr(); |
| 2642 | tty->print_cr("Individual compiler times (for compiled methods only)"); |
| 2643 | tty->print_cr("------------------------------------------------"); |
| 2644 | tty->cr(); |
| 2645 | } |
| 2646 | for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { |
| 2647 | AbstractCompiler* comp = _compilers[i]; |
| 2648 | if (comp != NULL__null) { |
| 2649 | print_times(comp->name(), comp->stats()); |
| 2650 | } |
| 2651 | } |
| 2652 | if (aggregate) { |
| 2653 | tty->cr(); |
| 2654 | tty->print_cr("Individual compilation Tier times (for compiled methods only)"); |
| 2655 | tty->print_cr("------------------------------------------------"); |
| 2656 | tty->cr(); |
| 2657 | } |
| 2658 | char tier_name[256]; |
| 2659 | for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) { |
| 2660 | CompilerStatistics* stats = &_stats_per_level[tier-1]; |
| 2661 | sprintf(tier_name, "Tier%d", tier); |
| 2662 | print_times(tier_name, stats); |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | if (!aggregate) { |
| 2667 | return; |
| 2668 | } |
| 2669 | |
| 2670 | elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; |
| 2671 | elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; |
| 2672 | elapsedTimer total_compilation = CompileBroker::_t_total_compilation; |
| 2673 | |
| 2674 | int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; |
| 2675 | int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; |
| 2676 | |
| 2677 | int standard_compile_count = CompileBroker::_total_standard_compile_count; |
| 2678 | int osr_compile_count = CompileBroker::_total_osr_compile_count; |
| 2679 | int total_compile_count = CompileBroker::_total_compile_count; |
| 2680 | int total_bailout_count = CompileBroker::_total_bailout_count; |
| 2681 | int total_invalidated_count = CompileBroker::_total_invalidated_count; |
| 2682 | |
| 2683 | int nmethods_size = CompileBroker::_sum_nmethod_code_size; |
| 2684 | int nmethods_code_size = CompileBroker::_sum_nmethod_size; |
| 2685 | |
| 2686 | tty->cr(); |
| 2687 | tty->print_cr("Accumulated compiler times"); |
| 2688 | tty->print_cr("----------------------------------------------------------"); |
| 2689 | //0000000000111111111122222222223333333333444444444455555555556666666666 |
| 2690 | //0123456789012345678901234567890123456789012345678901234567890123456789 |
| 2691 | tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); |
| 2692 | tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", |
| 2693 | standard_compilation.seconds(), |
| 2694 | standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count); |
| 2695 | tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", |
| 2696 | CompileBroker::_t_bailedout_compilation.seconds(), |
| 2697 | total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count); |
| 2698 | tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", |
| 2699 | osr_compilation.seconds(), |
| 2700 | osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count); |
| 2701 | tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", |
| 2702 | CompileBroker::_t_invalidated_compilation.seconds(), |
| 2703 | total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count); |
| 2704 | |
| 2705 | AbstractCompiler *comp = compiler(CompLevel_simple); |
| 2706 | if (comp != NULL__null) { |
| 2707 | tty->cr(); |
| 2708 | comp->print_timers(); |
| 2709 | } |
| 2710 | comp = compiler(CompLevel_full_optimization); |
| 2711 | if (comp != NULL__null) { |
| 2712 | tty->cr(); |
| 2713 | comp->print_timers(); |
| 2714 | } |
| 2715 | #if INCLUDE_JVMCI1 |
| 2716 | if (EnableJVMCI) { |
| 2717 | tty->cr(); |
| 2718 | JVMCICompiler::print_hosted_timers(); |
| 2719 | } |
| 2720 | #endif |
| 2721 | |
| 2722 | tty->cr(); |
| 2723 | tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); |
| 2724 | tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); |
| 2725 | tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); |
| 2726 | int tcb = osr_bytes_compiled + standard_bytes_compiled; |
| 2727 | tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); |
| 2728 | tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); |
| 2729 | tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); |
| 2730 | double tcs = total_compilation.seconds(); |
| 2731 | int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); |
| 2732 | tty->print_cr(" Average compilation speed : %8d bytes/s", bps); |
| 2733 | tty->cr(); |
| 2734 | tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); |
| 2735 | tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); |
| 2736 | } |
| 2737 | |
| 2738 | // Print general/accumulated JIT information. |
| 2739 | void CompileBroker::print_info(outputStream *out) { |
| 2740 | if (out == NULL__null) out = tty; |
| 2741 | out->cr(); |
| 2742 | out->print_cr("======================"); |
| 2743 | out->print_cr(" General JIT info "); |
| 2744 | out->print_cr("======================"); |
| 2745 | out->cr(); |
| 2746 | out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); |
| 2747 | out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); |
| 2748 | out->cr(); |
| 2749 | out->print_cr("CodeCache overview"); |
| 2750 | out->print_cr("--------------------------------------------------------"); |
| 2751 | out->cr(); |
| 2752 | out->print_cr(" Reserved size : " SIZE_FORMAT_W(7)"%" "7" "l" "u" " KB", CodeCache::max_capacity() / K); |
| 2753 | out->print_cr(" Committed size : " SIZE_FORMAT_W(7)"%" "7" "l" "u" " KB", CodeCache::capacity() / K); |
| 2754 | out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7)"%" "7" "l" "u" " KB", CodeCache::unallocated_capacity() / K); |
| 2755 | out->cr(); |
| 2756 | |
| 2757 | out->cr(); |
| 2758 | out->print_cr("CodeCache cleaning overview"); |
| 2759 | out->print_cr("--------------------------------------------------------"); |
| 2760 | out->cr(); |
| 2761 | NMethodSweeper::print(out); |
| 2762 | out->print_cr("--------------------------------------------------------"); |
| 2763 | out->cr(); |
| 2764 | } |
| 2765 | |
| 2766 | // Note: tty_lock must not be held upon entry to this function. |
| 2767 | // Print functions called from herein do "micro-locking" on tty_lock. |
| 2768 | // That's a tradeoff which keeps together important blocks of output. |
| 2769 | // At the same time, continuous tty_lock hold time is kept in check, |
| 2770 | // preventing concurrently printing threads from stalling a long time. |
| 2771 | void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) { |
| 2772 | TimeStamp ts_total; |
| 2773 | TimeStamp ts_global; |
| 2774 | TimeStamp ts; |
| 2775 | |
| 2776 | bool allFun = !strcmp(function, "all"); |
| 2777 | bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; |
| 2778 | bool usedSpace = !strcmp(function, "UsedSpace") || allFun; |
| 2779 | bool freeSpace = !strcmp(function, "FreeSpace") || allFun; |
| 2780 | bool methodCount = !strcmp(function, "MethodCount") || allFun; |
| 2781 | bool methodSpace = !strcmp(function, "MethodSpace") || allFun; |
| 2782 | bool methodAge = !strcmp(function, "MethodAge") || allFun; |
| 2783 | bool methodNames = !strcmp(function, "MethodNames") || allFun; |
| 2784 | bool discard = !strcmp(function, "discard") || allFun; |
| 2785 | |
| 2786 | if (out == NULL__null) { |
| 2787 | out = tty; |
| 2788 | } |
| 2789 | |
| 2790 | if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { |
| 2791 | out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); |
| 2792 | out->cr(); |
| 2793 | return; |
| 2794 | } |
| 2795 | |
| 2796 | ts_total.update(); // record starting point |
| 2797 | |
| 2798 | if (aggregate) { |
| 2799 | print_info(out); |
| 2800 | } |
| 2801 | |
| 2802 | // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. |
| 2803 | // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap. |
| 2804 | // When we request individual parts of the analysis via the jcmd interface, it is possible |
| 2805 | // that in between another thread (another jcmd user or the vm running into CodeCache OOM) |
| 2806 | // updated the aggregated data. We will then see a modified, but again consistent, view |
| 2807 | // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold |
| 2808 | // a lock across user interaction. |
| 2809 | |
| 2810 | // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock. |
| 2811 | // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time, |
| 2812 | // leading to an unnecessarily long hold time of the other locks we acquired before. |
| 2813 | ts.update(); // record starting point |
| 2814 | MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag); |
| 2815 | out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds()); |
| 2816 | |
| 2817 | // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache. |
| 2818 | // Unfortunately, such protection is not sufficient: |
| 2819 | // When a new nmethod is created via ciEnv::register_method(), the |
| 2820 | // Compile_lock is taken first. After some initializations, |
| 2821 | // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock |
| 2822 | // immediately (after finalizing the oop references). To lock out concurrent |
| 2823 | // modifiers, we have to grab both locks as well in the described sequence. |
| 2824 | // |
| 2825 | // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock |
| 2826 | // for the entire duration of aggregation and printing. That makes sure we see |
| 2827 | // a consistent picture and do not run into issues caused by concurrent alterations. |
| 2828 | bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() && |
| 2829 | !Compile_lock->owned_by_self(); |
| 2830 | bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() && |
| 2831 | !CodeCache_lock->owned_by_self(); |
| 2832 | Mutex* global_lock_1 = allFun ? (should_take_Compile_lock ? Compile_lock : NULL__null) : NULL__null; |
| 2833 | Monitor* global_lock_2 = allFun ? (should_take_CodeCache_lock ? CodeCache_lock : NULL__null) : NULL__null; |
| 2834 | Mutex* function_lock_1 = allFun ? NULL__null : (should_take_Compile_lock ? Compile_lock : NULL__null); |
| 2835 | Monitor* function_lock_2 = allFun ? NULL__null : (should_take_CodeCache_lock ? CodeCache_lock : NULL__null); |
| 2836 | ts_global.update(); // record starting point |
| 2837 | MutexLocker mu1(global_lock_1, Mutex::_safepoint_check_flag); |
| 2838 | MutexLocker mu2(global_lock_2, Mutex::_no_safepoint_check_flag); |
| 2839 | if ((global_lock_1 != NULL__null) || (global_lock_2 != NULL__null)) { |
| 2840 | out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds()); |
| 2841 | ts_global.update(); // record starting point |
| 2842 | } |
| 2843 | |
| 2844 | if (aggregate) { |
| 2845 | ts.update(); // record starting point |
| 2846 | MutexLocker mu11(function_lock_1, Mutex::_safepoint_check_flag); |
| 2847 | MutexLocker mu22(function_lock_2, Mutex::_no_safepoint_check_flag); |
| 2848 | if ((function_lock_1 != NULL__null) || (function_lock_1 != NULL__null)) { |
| 2849 | out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds()); |
| 2850 | } |
| 2851 | |
| 2852 | ts.update(); // record starting point |
| 2853 | CodeCache::aggregate(out, granularity); |
| 2854 | if ((function_lock_1 != NULL__null) || (function_lock_1 != NULL__null)) { |
| 2855 | out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds()); |
| 2856 | } |
| 2857 | } |
| 2858 | |
| 2859 | if (usedSpace) CodeCache::print_usedSpace(out); |
| 2860 | if (freeSpace) CodeCache::print_freeSpace(out); |
| 2861 | if (methodCount) CodeCache::print_count(out); |
| 2862 | if (methodSpace) CodeCache::print_space(out); |
| 2863 | if (methodAge) CodeCache::print_age(out); |
| 2864 | if (methodNames) { |
| 2865 | if (allFun) { |
| 2866 | // print_names() can only be used safely if the locks have been continuously held |
| 2867 | // since aggregation begin. That is true only for function "all". |
| 2868 | CodeCache::print_names(out); |
| 2869 | } else { |
| 2870 | out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'"); |
| 2871 | } |
| 2872 | } |
| 2873 | if (discard) CodeCache::discard(out); |
| 2874 | |
| 2875 | if ((global_lock_1 != NULL__null) || (global_lock_2 != NULL__null)) { |
| 2876 | out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds()); |
| 2877 | } |
| 2878 | out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds()); |
| 2879 | } |