| /* |
| * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/symbolTable.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "code/codeCache.hpp" |
| #include "code/dependencyContext.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "compiler/compileLog.hpp" |
| #include "compiler/compilerOracle.hpp" |
| #include "compiler/directivesParser.hpp" |
| #include "interpreter/linkResolver.hpp" |
| #include "logging/log.hpp" |
| #include "logging/logStream.hpp" |
| #include "memory/allocation.inline.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "oops/methodData.hpp" |
| #include "oops/method.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jvm.h" |
| #include "prims/nativeLookup.hpp" |
| #include "prims/whitebox.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/atomic.hpp" |
| #include "runtime/compilationPolicy.hpp" |
| #include "runtime/init.hpp" |
| #include "runtime/interfaceSupport.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/sweeper.hpp" |
| #include "runtime/timerTrace.hpp" |
| #include "trace/tracing.hpp" |
| #include "utilities/debug.hpp" |
| #include "utilities/dtrace.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/formatBuffer.hpp" |
| #ifdef COMPILER1 |
| #include "c1/c1_Compiler.hpp" |
| #endif |
| #if INCLUDE_JVMCI |
| #include "jvmci/jvmciCompiler.hpp" |
| #include "jvmci/jvmciRuntime.hpp" |
| #include "jvmci/jvmciJavaClasses.hpp" |
| #include "runtime/vframe.hpp" |
| #endif |
| #ifdef COMPILER2 |
| #include "opto/c2compiler.hpp" |
| #endif |
| #ifdef SHARK |
| #include "shark/sharkCompiler.hpp" |
| #endif |
| |
| #ifdef DTRACE_ENABLED |
| |
| // Only bother with this argument setup if dtrace is available |
| |
| #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ |
| { \ |
| Symbol* klass_name = (method)->klass_name(); \ |
| Symbol* name = (method)->name(); \ |
| Symbol* signature = (method)->signature(); \ |
| HOTSPOT_METHOD_COMPILE_BEGIN( \ |
| (char *) comp_name, strlen(comp_name), \ |
| (char *) klass_name->bytes(), klass_name->utf8_length(), \ |
| (char *) name->bytes(), name->utf8_length(), \ |
| (char *) signature->bytes(), signature->utf8_length()); \ |
| } |
| |
| #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ |
| { \ |
| Symbol* klass_name = (method)->klass_name(); \ |
| Symbol* name = (method)->name(); \ |
| Symbol* signature = (method)->signature(); \ |
| HOTSPOT_METHOD_COMPILE_END( \ |
| (char *) comp_name, strlen(comp_name), \ |
| (char *) klass_name->bytes(), klass_name->utf8_length(), \ |
| (char *) name->bytes(), name->utf8_length(), \ |
| (char *) signature->bytes(), signature->utf8_length(), (success)); \ |
| } |
| |
| #else // ndef DTRACE_ENABLED |
| |
| #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) |
| #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) |
| |
| #endif // ndef DTRACE_ENABLED |
| |
| bool CompileBroker::_initialized = false; |
| volatile bool CompileBroker::_should_block = false; |
| volatile jint CompileBroker::_print_compilation_warning = 0; |
| volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; |
| |
| // The installed compiler(s) |
| AbstractCompiler* CompileBroker::_compilers[2]; |
| |
| // These counters are used to assign an unique ID to each compilation. |
| volatile jint CompileBroker::_compilation_id = 0; |
| volatile jint CompileBroker::_osr_compilation_id = 0; |
| |
| // Debugging information |
| int CompileBroker::_last_compile_type = no_compile; |
| int CompileBroker::_last_compile_level = CompLevel_none; |
| char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; |
| |
| // Performance counters |
| PerfCounter* CompileBroker::_perf_total_compilation = NULL; |
| PerfCounter* CompileBroker::_perf_osr_compilation = NULL; |
| PerfCounter* CompileBroker::_perf_standard_compilation = NULL; |
| |
| PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; |
| PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; |
| PerfCounter* CompileBroker::_perf_total_compile_count = NULL; |
| PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; |
| PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; |
| |
| PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; |
| PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; |
| PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; |
| PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; |
| |
| PerfStringVariable* CompileBroker::_perf_last_method = NULL; |
| PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; |
| PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; |
| PerfVariable* CompileBroker::_perf_last_compile_type = NULL; |
| PerfVariable* CompileBroker::_perf_last_compile_size = NULL; |
| PerfVariable* CompileBroker::_perf_last_failed_type = NULL; |
| PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; |
| |
| // Timers and counters for generating statistics |
| elapsedTimer CompileBroker::_t_total_compilation; |
| elapsedTimer CompileBroker::_t_osr_compilation; |
| elapsedTimer CompileBroker::_t_standard_compilation; |
| elapsedTimer CompileBroker::_t_invalidated_compilation; |
| elapsedTimer CompileBroker::_t_bailedout_compilation; |
| |
| int CompileBroker::_total_bailout_count = 0; |
| int CompileBroker::_total_invalidated_count = 0; |
| int CompileBroker::_total_compile_count = 0; |
| int CompileBroker::_total_osr_compile_count = 0; |
| int CompileBroker::_total_standard_compile_count = 0; |
| |
| int CompileBroker::_sum_osr_bytes_compiled = 0; |
| int CompileBroker::_sum_standard_bytes_compiled = 0; |
| int CompileBroker::_sum_nmethod_size = 0; |
| int CompileBroker::_sum_nmethod_code_size = 0; |
| |
| long CompileBroker::_peak_compilation_time = 0; |
| |
| CompileQueue* CompileBroker::_c2_compile_queue = NULL; |
| CompileQueue* CompileBroker::_c1_compile_queue = NULL; |
| |
| |
| |
| class CompilationLog : public StringEventLog { |
| public: |
| CompilationLog() : StringEventLog("Compilation events") { |
| } |
| |
| void log_compile(JavaThread* thread, CompileTask* task) { |
| StringLogMessage lm; |
| stringStream sstr = lm.stream(); |
| // msg.time_stamp().update_to(tty->time_stamp().ticks()); |
| task->print(&sstr, NULL, true, false); |
| log(thread, "%s", (const char*)lm); |
| } |
| |
| void log_nmethod(JavaThread* thread, nmethod* nm) { |
| log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", |
| nm->compile_id(), nm->is_osr_method() ? "%" : "", |
| p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); |
| } |
| |
| void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { |
| StringLogMessage lm; |
| lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); |
| if (retry_message != NULL) { |
| lm.append(" (%s)", retry_message); |
| } |
| lm.print("\n"); |
| log(thread, "%s", (const char*)lm); |
| } |
| |
| void log_metaspace_failure(const char* reason) { |
| ResourceMark rm; |
| StringLogMessage lm; |
| lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); |
| lm.print("\n"); |
| log(JavaThread::current(), "%s", (const char*)lm); |
| } |
| }; |
| |
| static CompilationLog* _compilation_log = NULL; |
| |
| bool compileBroker_init() { |
| if (LogEvents) { |
| _compilation_log = new CompilationLog(); |
| } |
| |
| // init directives stack, adding default directive |
| DirectivesStack::init(); |
| |
| if (DirectivesParser::has_file()) { |
| return DirectivesParser::parse_from_flag(); |
| } else if (CompilerDirectivesPrint) { |
| // Print default directive even when no other was added |
| DirectivesStack::print(tty); |
| } |
| |
| return true; |
| } |
| |
| CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { |
| CompilerThread* thread = CompilerThread::current(); |
| thread->set_task(task); |
| #if INCLUDE_JVMCI |
| if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { |
| task->set_jvmci_compiler_thread(thread); |
| } |
| #endif |
| CompileLog* log = thread->log(); |
| if (log != NULL) task->log_task_start(log); |
| } |
| |
| CompileTaskWrapper::~CompileTaskWrapper() { |
| CompilerThread* thread = CompilerThread::current(); |
| CompileTask* task = thread->task(); |
| CompileLog* log = thread->log(); |
| if (log != NULL) task->log_task_done(log); |
| thread->set_task(NULL); |
| task->set_code_handle(NULL); |
| thread->set_env(NULL); |
| if (task->is_blocking()) { |
| bool free_task = false; |
| { |
| MutexLocker notifier(task->lock(), thread); |
| task->mark_complete(); |
| #if INCLUDE_JVMCI |
| if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { |
| if (!task->has_waiter()) { |
| // The waiting thread timed out and thus did not free the task. |
| free_task = true; |
| } |
| task->set_jvmci_compiler_thread(NULL); |
| } |
| #endif |
| if (!free_task) { |
| // Notify the waiting thread that the compilation has completed |
| // so that it can free the task. |
| task->lock()->notify_all(); |
| } |
| } |
| if (free_task) { |
| // The task can only be freed once the task lock is released. |
| CompileTask::free(task); |
| } |
| } else { |
| task->mark_complete(); |
| |
| // By convention, the compiling thread is responsible for |
| // recycling a non-blocking CompileTask. |
| CompileTask::free(task); |
| } |
| } |
| |
| /** |
| * Add a CompileTask to a CompileQueue. |
| */ |
| void CompileQueue::add(CompileTask* task) { |
| assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); |
| |
| task->set_next(NULL); |
| task->set_prev(NULL); |
| |
| if (_last == NULL) { |
| // The compile queue is empty. |
| assert(_first == NULL, "queue is empty"); |
| _first = task; |
| _last = task; |
| } else { |
| // Append the task to the queue. |
| assert(_last->next() == NULL, "not last"); |
| _last->set_next(task); |
| task->set_prev(_last); |
| _last = task; |
| } |
| ++_size; |
| |
| // Mark the method as being in the compile queue. |
| task->method()->set_queued_for_compilation(); |
| |
| if (CIPrintCompileQueue) { |
| print_tty(); |
| } |
| |
| if (LogCompilation && xtty != NULL) { |
| task->log_task_queued(); |
| } |
| |
| // Notify CompilerThreads that a task is available. |
| MethodCompileQueue_lock->notify_all(); |
| } |
| |
| /** |
| * Empties compilation queue by putting all compilation tasks onto |
| * a freelist. Furthermore, the method wakes up all threads that are |
| * waiting on a compilation task to finish. This can happen if background |
| * compilation is disabled. |
| */ |
| void CompileQueue::free_all() { |
| MutexLocker mu(MethodCompileQueue_lock); |
| CompileTask* next = _first; |
| |
| // Iterate over all tasks in the compile queue |
| while (next != NULL) { |
| CompileTask* current = next; |
| next = current->next(); |
| { |
| // Wake up thread that blocks on the compile task. |
| MutexLocker ct_lock(current->lock()); |
| current->lock()->notify(); |
| } |
| // Put the task back on the freelist. |
| CompileTask::free(current); |
| } |
| _first = NULL; |
| |
| // Wake up all threads that block on the queue. |
| MethodCompileQueue_lock->notify_all(); |
| } |
| |
| /** |
| * Get the next CompileTask from a CompileQueue |
| */ |
| CompileTask* CompileQueue::get() { |
| // save methods from RedefineClasses across safepoint |
| // across MethodCompileQueue_lock below. |
| methodHandle save_method; |
| methodHandle save_hot_method; |
| |
| MutexLocker locker(MethodCompileQueue_lock); |
| // If _first is NULL we have no more compile jobs. There are two reasons for |
| // having no compile jobs: First, we compiled everything we wanted. Second, |
| // we ran out of code cache so compilation has been disabled. In the latter |
| // case we perform code cache sweeps to free memory such that we can re-enable |
| // compilation. |
| while (_first == NULL) { |
| // Exit loop if compilation is disabled forever |
| if (CompileBroker::is_compilation_disabled_forever()) { |
| return NULL; |
| } |
| |
| // If there are no compilation tasks and we can compile new jobs |
| // (i.e., there is enough free space in the code cache) there is |
| // no need to invoke the sweeper. As a result, the hotness of methods |
| // remains unchanged. This behavior is desired, since we want to keep |
| // the stable state, i.e., we do not want to evict methods from the |
| // code cache if it is unnecessary. |
| // We need a timed wait here, since compiler threads can exit if compilation |
| // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads |
| // is not critical and we do not want idle compiler threads to wake up too often. |
| MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); |
| } |
| |
| if (CompileBroker::is_compilation_disabled_forever()) { |
| return NULL; |
| } |
| |
| CompileTask* task; |
| { |
| NoSafepointVerifier nsv; |
| task = CompilationPolicy::policy()->select_task(this); |
| } |
| |
| if (task != NULL) { |
| // Save method pointers across unlock safepoint. The task is removed from |
| // the compilation queue, which is walked during RedefineClasses. |
| save_method = methodHandle(task->method()); |
| save_hot_method = methodHandle(task->hot_method()); |
| |
| remove(task); |
| purge_stale_tasks(); // may temporarily release MCQ lock |
| } |
| |
| return task; |
| } |
| |
| // Clean & deallocate stale compile tasks. |
| // Temporarily releases MethodCompileQueue lock. |
| void CompileQueue::purge_stale_tasks() { |
| assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); |
| if (_first_stale != NULL) { |
| // Stale tasks are purged when MCQ lock is released, |
| // but _first_stale updates are protected by MCQ lock. |
| // Once task processing starts and MCQ lock is released, |
| // other compiler threads can reuse _first_stale. |
| CompileTask* head = _first_stale; |
| _first_stale = NULL; |
| { |
| MutexUnlocker ul(MethodCompileQueue_lock); |
| for (CompileTask* task = head; task != NULL; ) { |
| CompileTask* next_task = task->next(); |
| CompileTaskWrapper ctw(task); // Frees the task |
| task->set_failure_reason("stale task"); |
| task = next_task; |
| } |
| } |
| } |
| } |
| |
| void CompileQueue::remove(CompileTask* task) { |
| assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); |
| if (task->prev() != NULL) { |
| task->prev()->set_next(task->next()); |
| } else { |
| // max is the first element |
| assert(task == _first, "Sanity"); |
| _first = task->next(); |
| } |
| |
| if (task->next() != NULL) { |
| task->next()->set_prev(task->prev()); |
| } else { |
| // max is the last element |
| assert(task == _last, "Sanity"); |
| _last = task->prev(); |
| } |
| --_size; |
| } |
| |
| void CompileQueue::remove_and_mark_stale(CompileTask* task) { |
| assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); |
| remove(task); |
| |
| // Enqueue the task for reclamation (should be done outside MCQ lock) |
| task->set_next(_first_stale); |
| task->set_prev(NULL); |
| _first_stale = task; |
| } |
| |
| // methods in the compile queue need to be marked as used on the stack |
| // so that they don't get reclaimed by Redefine Classes |
| void CompileQueue::mark_on_stack() { |
| CompileTask* task = _first; |
| while (task != NULL) { |
| task->mark_on_stack(); |
| task = task->next(); |
| } |
| } |
| |
| |
| CompileQueue* CompileBroker::compile_queue(int comp_level) { |
| if (is_c2_compile(comp_level)) return _c2_compile_queue; |
| if (is_c1_compile(comp_level)) return _c1_compile_queue; |
| return NULL; |
| } |
| |
| void CompileBroker::print_compile_queues(outputStream* st) { |
| st->print_cr("Current compiles: "); |
| MutexLocker locker(MethodCompileQueue_lock); |
| |
| char buf[2000]; |
| int buflen = sizeof(buf); |
| Threads::print_threads_compiling(st, buf, buflen); |
| |
| st->cr(); |
| if (_c1_compile_queue != NULL) { |
| _c1_compile_queue->print(st); |
| } |
| if (_c2_compile_queue != NULL) { |
| _c2_compile_queue->print(st); |
| } |
| } |
| |
| void CompileQueue::print(outputStream* st) { |
| assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); |
| st->print_cr("%s:", name()); |
| CompileTask* task = _first; |
| if (task == NULL) { |
| st->print_cr("Empty"); |
| } else { |
| while (task != NULL) { |
| task->print(st, NULL, true, true); |
| task = task->next(); |
| } |
| } |
| st->cr(); |
| } |
| |
| void CompileQueue::print_tty() { |
| ttyLocker ttyl; |
| print(tty); |
| } |
| |
| CompilerCounters::CompilerCounters() { |
| _current_method[0] = '\0'; |
| _compile_type = CompileBroker::no_compile; |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::compilation_init |
| // |
| // Initialize the Compilation object |
| void CompileBroker::compilation_init(TRAPS) { |
| _last_method_compiled[0] = '\0'; |
| |
| // No need to initialize compilation system if we do not use it. |
| if (!UseCompiler) { |
| return; |
| } |
| #ifndef SHARK |
| // Set the interface to the current compiler(s). |
| int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); |
| int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); |
| |
| #if INCLUDE_JVMCI |
| if (EnableJVMCI) { |
| // This is creating a JVMCICompiler singleton. |
| JVMCICompiler* jvmci = new JVMCICompiler(); |
| |
| if (UseJVMCICompiler) { |
| _compilers[1] = jvmci; |
| if (FLAG_IS_DEFAULT(JVMCIThreads)) { |
| if (BootstrapJVMCI) { |
| // JVMCI will bootstrap so give it more threads |
| c2_count = MIN2(32, os::active_processor_count()); |
| } |
| } else { |
| c2_count = JVMCIThreads; |
| } |
| if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { |
| } else { |
| c1_count = JVMCIHostThreads; |
| } |
| } |
| } |
| #endif // INCLUDE_JVMCI |
| |
| #ifdef COMPILER1 |
| if (c1_count > 0) { |
| _compilers[0] = new Compiler(); |
| } |
| #endif // COMPILER1 |
| |
| #ifdef COMPILER2 |
| if (true JVMCI_ONLY( && !UseJVMCICompiler)) { |
| if (c2_count > 0) { |
| _compilers[1] = new C2Compiler(); |
| } |
| } |
| #endif // COMPILER2 |
| |
| #else // SHARK |
| int c1_count = 0; |
| int c2_count = 1; |
| |
| _compilers[1] = new SharkCompiler(); |
| #endif // SHARK |
| |
| // Start the compiler thread(s) and the sweeper thread |
| init_compiler_sweeper_threads(c1_count, c2_count); |
| // totalTime performance counter is always created as it is required |
| // by the implementation of java.lang.management.CompilationMBean. |
| { |
| EXCEPTION_MARK; |
| _perf_total_compilation = |
| PerfDataManager::create_counter(JAVA_CI, "totalTime", |
| PerfData::U_Ticks, CHECK); |
| } |
| |
| if (UsePerfData) { |
| |
| EXCEPTION_MARK; |
| |
| // create the jvmstat performance counters |
| _perf_osr_compilation = |
| PerfDataManager::create_counter(SUN_CI, "osrTime", |
| PerfData::U_Ticks, CHECK); |
| |
| _perf_standard_compilation = |
| PerfDataManager::create_counter(SUN_CI, "standardTime", |
| PerfData::U_Ticks, CHECK); |
| |
| _perf_total_bailout_count = |
| PerfDataManager::create_counter(SUN_CI, "totalBailouts", |
| PerfData::U_Events, CHECK); |
| |
| _perf_total_invalidated_count = |
| PerfDataManager::create_counter(SUN_CI, "totalInvalidates", |
| PerfData::U_Events, CHECK); |
| |
| _perf_total_compile_count = |
| PerfDataManager::create_counter(SUN_CI, "totalCompiles", |
| PerfData::U_Events, CHECK); |
| _perf_total_osr_compile_count = |
| PerfDataManager::create_counter(SUN_CI, "osrCompiles", |
| PerfData::U_Events, CHECK); |
| |
| _perf_total_standard_compile_count = |
| PerfDataManager::create_counter(SUN_CI, "standardCompiles", |
| PerfData::U_Events, CHECK); |
| |
| _perf_sum_osr_bytes_compiled = |
| PerfDataManager::create_counter(SUN_CI, "osrBytes", |
| PerfData::U_Bytes, CHECK); |
| |
| _perf_sum_standard_bytes_compiled = |
| PerfDataManager::create_counter(SUN_CI, "standardBytes", |
| PerfData::U_Bytes, CHECK); |
| |
| _perf_sum_nmethod_size = |
| PerfDataManager::create_counter(SUN_CI, "nmethodSize", |
| PerfData::U_Bytes, CHECK); |
| |
| _perf_sum_nmethod_code_size = |
| PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", |
| PerfData::U_Bytes, CHECK); |
| |
| _perf_last_method = |
| PerfDataManager::create_string_variable(SUN_CI, "lastMethod", |
| CompilerCounters::cmname_buffer_length, |
| "", CHECK); |
| |
| _perf_last_failed_method = |
| PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", |
| CompilerCounters::cmname_buffer_length, |
| "", CHECK); |
| |
| _perf_last_invalidated_method = |
| PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", |
| CompilerCounters::cmname_buffer_length, |
| "", CHECK); |
| |
| _perf_last_compile_type = |
| PerfDataManager::create_variable(SUN_CI, "lastType", |
| PerfData::U_None, |
| (jlong)CompileBroker::no_compile, |
| CHECK); |
| |
| _perf_last_compile_size = |
| PerfDataManager::create_variable(SUN_CI, "lastSize", |
| PerfData::U_Bytes, |
| (jlong)CompileBroker::no_compile, |
| CHECK); |
| |
| |
| _perf_last_failed_type = |
| PerfDataManager::create_variable(SUN_CI, "lastFailedType", |
| PerfData::U_None, |
| (jlong)CompileBroker::no_compile, |
| CHECK); |
| |
| _perf_last_invalidated_type = |
| PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", |
| PerfData::U_None, |
| (jlong)CompileBroker::no_compile, |
| CHECK); |
| } |
| |
| _initialized = true; |
| } |
| |
| |
| JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, |
| AbstractCompiler* comp, bool compiler_thread, TRAPS) { |
| JavaThread* thread = NULL; |
| Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0); |
| InstanceKlass* klass = InstanceKlass::cast(k); |
| instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); |
| Handle string = java_lang_String::create_from_str(name, CHECK_0); |
| |
| // Initialize thread_oop to put it into the system threadGroup |
| Handle thread_group (THREAD, Universe::system_thread_group()); |
| JavaValue result(T_VOID); |
| JavaCalls::call_special(&result, thread_oop, |
| klass, |
| vmSymbols::object_initializer_name(), |
| vmSymbols::threadgroup_string_void_signature(), |
| thread_group, |
| string, |
| CHECK_0); |
| |
| { |
| MutexLocker mu(Threads_lock, THREAD); |
| if (compiler_thread) { |
| thread = new CompilerThread(queue, counters); |
| } else { |
| thread = new CodeCacheSweeperThread(); |
| } |
| // At this point the new CompilerThread data-races with this startup |
| // thread (which I believe is the primoridal thread and NOT the VM |
| // thread). This means Java bytecodes being executed at startup can |
| // queue compile jobs which will run at whatever default priority the |
| // newly created CompilerThread runs at. |
| |
| |
| // At this point it may be possible that no osthread was created for the |
| // JavaThread due to lack of memory. We would have to throw an exception |
| // in that case. However, since this must work and we do not allow |
| // exceptions anyway, check and abort if this fails. But first release the |
| // lock. |
| |
| if (thread != NULL && thread->osthread() != NULL) { |
| |
| java_lang_Thread::set_thread(thread_oop(), thread); |
| |
| // Note that this only sets the JavaThread _priority field, which by |
| // definition is limited to Java priorities and not OS priorities. |
| // The os-priority is set in the CompilerThread startup code itself |
| |
| java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); |
| |
| // Note that we cannot call os::set_priority because it expects Java |
| // priorities and we are *explicitly* using OS priorities so that it's |
| // possible to set the compiler thread priority higher than any Java |
| // thread. |
| |
| int native_prio = CompilerThreadPriority; |
| if (native_prio == -1) { |
| if (UseCriticalCompilerThreadPriority) { |
| native_prio = os::java_to_os_priority[CriticalPriority]; |
| } else { |
| native_prio = os::java_to_os_priority[NearMaxPriority]; |
| } |
| } |
| os::set_native_priority(thread, native_prio); |
| |
| java_lang_Thread::set_daemon(thread_oop()); |
| |
| thread->set_threadObj(thread_oop()); |
| if (compiler_thread) { |
| thread->as_CompilerThread()->set_compiler(comp); |
| } |
| Threads::add(thread); |
| Thread::start(thread); |
| } |
| } |
| |
| // First release lock before aborting VM. |
| if (thread == NULL || thread->osthread() == NULL) { |
| vm_exit_during_initialization("java.lang.OutOfMemoryError", |
| os::native_thread_creation_failed_msg()); |
| } |
| |
| // Let go of Threads_lock before yielding |
| os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) |
| |
| return thread; |
| } |
| |
| |
| void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) { |
| EXCEPTION_MARK; |
| #if !defined(ZERO) && !defined(SHARK) |
| assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); |
| #endif // !ZERO && !SHARK |
| // Initialize the compilation queue |
| if (c2_compiler_count > 0) { |
| const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; |
| _c2_compile_queue = new CompileQueue(name); |
| _compilers[1]->set_num_compiler_threads(c2_compiler_count); |
| } |
| if (c1_compiler_count > 0) { |
| _c1_compile_queue = new CompileQueue("C1 compile queue"); |
| _compilers[0]->set_num_compiler_threads(c1_compiler_count); |
| } |
| |
| int compiler_count = c1_compiler_count + c2_compiler_count; |
| |
| char name_buffer[256]; |
| const bool compiler_thread = true; |
| for (int i = 0; i < c2_compiler_count; i++) { |
| // Create a name for our thread. |
| sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); |
| CompilerCounters* counters = new CompilerCounters(); |
| // Shark and C2 |
| make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK); |
| } |
| |
| for (int i = c2_compiler_count; i < compiler_count; i++) { |
| // Create a name for our thread. |
| sprintf(name_buffer, "C1 CompilerThread%d", i); |
| CompilerCounters* counters = new CompilerCounters(); |
| // C1 |
| make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK); |
| } |
| |
| if (UsePerfData) { |
| PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK); |
| } |
| |
| if (MethodFlushing) { |
| // Initialize the sweeper thread |
| make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK); |
| } |
| } |
| |
| |
| /** |
| * Set the methods on the stack as on_stack so that redefine classes doesn't |
| * reclaim them. This method is executed at a safepoint. |
| */ |
| void CompileBroker::mark_on_stack() { |
| assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); |
| // Since we are at a safepoint, we do not need a lock to access |
| // the compile queues. |
| if (_c2_compile_queue != NULL) { |
| _c2_compile_queue->mark_on_stack(); |
| } |
| if (_c1_compile_queue != NULL) { |
| _c1_compile_queue->mark_on_stack(); |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::compile_method |
| // |
| // Request compilation of a method. |
| void CompileBroker::compile_method_base(const methodHandle& method, |
| int osr_bci, |
| int comp_level, |
| const methodHandle& hot_method, |
| int hot_count, |
| CompileTask::CompileReason compile_reason, |
| bool blocking, |
| Thread* thread) { |
| guarantee(!method->is_abstract(), "cannot compile abstract methods"); |
| assert(method->method_holder()->is_instance_klass(), |
| "sanity check"); |
| assert(!method->method_holder()->is_not_initialized(), |
| "method holder must be initialized"); |
| assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); |
| |
| if (CIPrintRequests) { |
| tty->print("request: "); |
| method->print_short_name(tty); |
| if (osr_bci != InvocationEntryBci) { |
| tty->print(" osr_bci: %d", osr_bci); |
| } |
| tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); |
| if (!hot_method.is_null()) { |
| tty->print(" hot: "); |
| if (hot_method() != method()) { |
| hot_method->print_short_name(tty); |
| } else { |
| tty->print("yes"); |
| } |
| } |
| tty->cr(); |
| } |
| |
| // A request has been made for compilation. Before we do any |
| // real work, check to see if the method has been compiled |
| // in the meantime with a definitive result. |
| if (compilation_is_complete(method, osr_bci, comp_level)) { |
| return; |
| } |
| |
| #ifndef PRODUCT |
| if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { |
| if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { |
| // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. |
| return; |
| } |
| } |
| #endif |
| |
| // If this method is already in the compile queue, then |
| // we do not block the current thread. |
| if (compilation_is_in_queue(method)) { |
| // We may want to decay our counter a bit here to prevent |
| // multiple denied requests for compilation. This is an |
| // open compilation policy issue. Note: The other possibility, |
| // in the case that this is a blocking compile request, is to have |
| // all subsequent blocking requesters wait for completion of |
| // ongoing compiles. Note that in this case we'll need a protocol |
| // for freeing the associated compile tasks. [Or we could have |
| // a single static monitor on which all these waiters sleep.] |
| return; |
| } |
| |
| if (TieredCompilation) { |
| // Tiered policy requires MethodCounters to exist before adding a method to |
| // the queue. Create if we don't have them yet. |
| method->get_method_counters(thread); |
| } |
| |
| // Outputs from the following MutexLocker block: |
| CompileTask* task = NULL; |
| CompileQueue* queue = compile_queue(comp_level); |
| |
| // Acquire our lock. |
| { |
| MutexLocker locker(MethodCompileQueue_lock, thread); |
| |
| // Make sure the method has not slipped into the queues since |
| // last we checked; note that those checks were "fast bail-outs". |
| // Here we need to be more careful, see 14012000 below. |
| if (compilation_is_in_queue(method)) { |
| return; |
| } |
| |
| // We need to check again to see if the compilation has |
| // completed. A previous compilation may have registered |
| // some result. |
| if (compilation_is_complete(method, osr_bci, comp_level)) { |
| return; |
| } |
| |
| // We now know that this compilation is not pending, complete, |
| // or prohibited. Assign a compile_id to this compilation |
| // and check to see if it is in our [Start..Stop) range. |
| int compile_id = assign_compile_id(method, osr_bci); |
| if (compile_id == 0) { |
| // The compilation falls outside the allowed range. |
| return; |
| } |
| |
| #if INCLUDE_JVMCI |
| if (UseJVMCICompiler) { |
| if (blocking) { |
| // Don't allow blocking compiles for requests triggered by JVMCI. |
| if (thread->is_Compiler_thread()) { |
| blocking = false; |
| } |
| |
| // Don't allow blocking compiles if inside a class initializer or while performing class loading |
| vframeStream vfst((JavaThread*) thread); |
| for (; !vfst.at_end(); vfst.next()) { |
| if (vfst.method()->is_static_initializer() || |
| (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && |
| vfst.method()->name() == vmSymbols::loadClass_name())) { |
| blocking = false; |
| break; |
| } |
| } |
| |
| // Don't allow blocking compilation requests to JVMCI |
| // if JVMCI itself is not yet initialized |
| if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { |
| blocking = false; |
| } |
| |
| // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown |
| // to avoid deadlock between compiler thread(s) and threads run at shutdown |
| // such as the DestroyJavaVM thread. |
| if (JVMCIRuntime::shutdown_called()) { |
| blocking = false; |
| } |
| } |
| } |
| #endif // INCLUDE_JVMCI |
| |
| // We will enter the compilation in the queue. |
| // 14012000: Note that this sets the queued_for_compile bits in |
| // the target method. We can now reason that a method cannot be |
| // queued for compilation more than once, as follows: |
| // Before a thread queues a task for compilation, it first acquires |
| // the compile queue lock, then checks if the method's queued bits |
| // are set or it has already been compiled. Thus there can not be two |
| // instances of a compilation task for the same method on the |
| // compilation queue. Consider now the case where the compilation |
| // thread has already removed a task for that method from the queue |
| // and is in the midst of compiling it. In this case, the |
| // queued_for_compile bits must be set in the method (and these |
| // will be visible to the current thread, since the bits were set |
| // under protection of the compile queue lock, which we hold now. |
| // When the compilation completes, the compiler thread first sets |
| // the compilation result and then clears the queued_for_compile |
| // bits. Neither of these actions are protected by a barrier (or done |
| // under the protection of a lock), so the only guarantee we have |
| // (on machines with TSO (Total Store Order)) is that these values |
| // will update in that order. As a result, the only combinations of |
| // these bits that the current thread will see are, in temporal order: |
| // <RESULT, QUEUE> : |
| // <0, 1> : in compile queue, but not yet compiled |
| // <1, 1> : compiled but queue bit not cleared |
| // <1, 0> : compiled and queue bit cleared |
| // Because we first check the queue bits then check the result bits, |
| // we are assured that we cannot introduce a duplicate task. |
| // Note that if we did the tests in the reverse order (i.e. check |
| // result then check queued bit), we could get the result bit before |
| // the compilation completed, and the queue bit after the compilation |
| // completed, and end up introducing a "duplicate" (redundant) task. |
| // In that case, the compiler thread should first check if a method |
| // has already been compiled before trying to compile it. |
| // NOTE: in the event that there are multiple compiler threads and |
| // there is de-optimization/recompilation, things will get hairy, |
| // and in that case it's best to protect both the testing (here) of |
| // these bits, and their updating (here and elsewhere) under a |
| // common lock. |
| task = create_compile_task(queue, |
| compile_id, method, |
| osr_bci, comp_level, |
| hot_method, hot_count, compile_reason, |
| blocking); |
| } |
| |
| if (blocking) { |
| wait_for_completion(task); |
| } |
| } |
| |
| nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, |
| int comp_level, |
| const methodHandle& hot_method, int hot_count, |
| CompileTask::CompileReason compile_reason, |
| Thread* THREAD) { |
| // Do nothing if compilebroker is not initalized or compiles are submitted on level none |
| if (!_initialized || comp_level == CompLevel_none) { |
| return NULL; |
| } |
| |
| AbstractCompiler *comp = CompileBroker::compiler(comp_level); |
| assert(comp != NULL, "Ensure we have a compiler"); |
| |
| DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); |
| nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); |
| DirectivesStack::release(directive); |
| return nm; |
| } |
| |
| nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, |
| int comp_level, |
| const methodHandle& hot_method, int hot_count, |
| CompileTask::CompileReason compile_reason, |
| DirectiveSet* directive, |
| Thread* THREAD) { |
| |
| // make sure arguments make sense |
| assert(method->method_holder()->is_instance_klass(), "not an instance method"); |
| assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); |
| assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); |
| assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); |
| assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); |
| // allow any levels for WhiteBox |
| assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); |
| // return quickly if possible |
| |
| // lock, make sure that the compilation |
| // isn't prohibited in a straightforward way. |
| AbstractCompiler* comp = CompileBroker::compiler(comp_level); |
| if (comp == NULL || !comp->can_compile_method(method) || |
| compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { |
| return NULL; |
| } |
| |
| #if INCLUDE_JVMCI |
| if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { |
| return NULL; |
| } |
| #endif |
| |
| if (osr_bci == InvocationEntryBci) { |
| // standard compilation |
| CompiledMethod* method_code = method->code(); |
| if (method_code != NULL && method_code->is_nmethod()) { |
| if (compilation_is_complete(method, osr_bci, comp_level)) { |
| return (nmethod*) method_code; |
| } |
| } |
| if (method->is_not_compilable(comp_level)) { |
| return NULL; |
| } |
| } else { |
| // osr compilation |
| #ifndef TIERED |
| // seems like an assert of dubious value |
| assert(comp_level == CompLevel_highest_tier, |
| "all OSR compiles are assumed to be at a single compilation level"); |
| #endif // TIERED |
| // We accept a higher level osr method |
| nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); |
| if (nm != NULL) return nm; |
| if (method->is_not_osr_compilable(comp_level)) return NULL; |
| } |
| |
| assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); |
| // some prerequisites that are compiler specific |
| if (comp->is_c2() || comp->is_shark()) { |
| method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); |
| // Resolve all classes seen in the signature of the method |
| // we are compiling. |
| Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); |
| } |
| |
| // If the method is native, do the lookup in the thread requesting |
| // the compilation. Native lookups can load code, which is not |
| // permitted during compilation. |
| // |
| // Note: A native method implies non-osr compilation which is |
| // checked with an assertion at the entry of this method. |
| if (method->is_native() && !method->is_method_handle_intrinsic()) { |
| bool in_base_library; |
| address adr = NativeLookup::lookup(method, in_base_library, THREAD); |
| if (HAS_PENDING_EXCEPTION) { |
| // In case of an exception looking up the method, we just forget |
| // about it. The interpreter will kick-in and throw the exception. |
| method->set_not_compilable(); // implies is_not_osr_compilable() |
| CLEAR_PENDING_EXCEPTION; |
| return NULL; |
| } |
| assert(method->has_native_function(), "must have native code by now"); |
| } |
| |
| // RedefineClasses() has replaced this method; just return |
| if (method->is_old()) { |
| return NULL; |
| } |
| |
| // JVMTI -- post_compile_event requires jmethod_id() that may require |
| // a lock the compiling thread can not acquire. Prefetch it here. |
| if (JvmtiExport::should_post_compiled_method_load()) { |
| method->jmethod_id(); |
| } |
| |
| // do the compilation |
| if (method->is_native()) { |
| if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { |
| // The following native methods: |
| // |
| // java.lang.Float.intBitsToFloat |
| // java.lang.Float.floatToRawIntBits |
| // java.lang.Double.longBitsToDouble |
| // java.lang.Double.doubleToRawLongBits |
| // |
| // are called through the interpreter even if interpreter native stubs |
| // are not preferred (i.e., calling through adapter handlers is preferred). |
| // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved |
| // if the version of the methods from the native libraries is called. |
| // As the interpreter and the C2-intrinsified version of the methods preserves |
| // sNaNs, that would result in an inconsistent way of handling of sNaNs. |
| if ((UseSSE >= 1 && |
| (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || |
| method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || |
| (UseSSE >= 2 && |
| (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || |
| method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { |
| return NULL; |
| } |
| |
| // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that |
| // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). |
| // |
| // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter |
| // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. |
| AdapterHandlerLibrary::create_native_wrapper(method); |
| } else { |
| return NULL; |
| } |
| } else { |
| // If the compiler is shut off due to code cache getting full |
| // fail out now so blocking compiles dont hang the java thread |
| if (!should_compile_new_jobs()) { |
| CompilationPolicy::policy()->delay_compilation(method()); |
| return NULL; |
| } |
| bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; |
| compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); |
| } |
| |
| // return requested nmethod |
| // We accept a higher level osr method |
| if (osr_bci == InvocationEntryBci) { |
| CompiledMethod* code = method->code(); |
| if (code == NULL) { |
| return (nmethod*) code; |
| } else { |
| return code->as_nmethod_or_null(); |
| } |
| } |
| return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::compilation_is_complete |
| // |
| // See if compilation of this method is already complete. |
| bool CompileBroker::compilation_is_complete(const methodHandle& method, |
| int osr_bci, |
| int comp_level) { |
| bool is_osr = (osr_bci != standard_entry_bci); |
| if (is_osr) { |
| if (method->is_not_osr_compilable(comp_level)) { |
| return true; |
| } else { |
| nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); |
| return (result != NULL); |
| } |
| } else { |
| if (method->is_not_compilable(comp_level)) { |
| return true; |
| } else { |
| CompiledMethod* result = method->code(); |
| if (result == NULL) return false; |
| return comp_level == result->comp_level(); |
| } |
| } |
| } |
| |
| |
| /** |
| * See if this compilation is already requested. |
| * |
| * Implementation note: there is only a single "is in queue" bit |
| * for each method. This means that the check below is overly |
| * conservative in the sense that an osr compilation in the queue |
| * will block a normal compilation from entering the queue (and vice |
| * versa). This can be remedied by a full queue search to disambiguate |
| * cases. If it is deemed profitable, this may be done. |
| */ |
| bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { |
| return method->queued_for_compilation(); |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::compilation_is_prohibited |
| // |
| // See if this compilation is not allowed. |
| bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { |
| bool is_native = method->is_native(); |
| // Some compilers may not support the compilation of natives. |
| AbstractCompiler *comp = compiler(comp_level); |
| if (is_native && |
| (!CICompileNatives || comp == NULL || !comp->supports_native())) { |
| method->set_not_compilable_quietly(comp_level); |
| return true; |
| } |
| |
| bool is_osr = (osr_bci != standard_entry_bci); |
| // Some compilers may not support on stack replacement. |
| if (is_osr && |
| (!CICompileOSR || comp == NULL || !comp->supports_osr())) { |
| method->set_not_osr_compilable(comp_level); |
| return true; |
| } |
| |
| // The method may be explicitly excluded by the user. |
| double scale; |
| if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { |
| bool quietly = CompilerOracle::should_exclude_quietly(); |
| if (PrintCompilation && !quietly) { |
| // This does not happen quietly... |
| ResourceMark rm; |
| tty->print("### Excluding %s:%s", |
| method->is_native() ? "generation of native wrapper" : "compile", |
| (method->is_static() ? " static" : "")); |
| method->print_short_name(tty); |
| tty->cr(); |
| } |
| method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Generate serialized IDs for compilation requests. If certain debugging flags are used |
| * and the ID is not within the specified range, the method is not compiled and 0 is returned. |
| * The function also allows to generate separate compilation IDs for OSR compilations. |
| */ |
| int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { |
| #ifdef ASSERT |
| bool is_osr = (osr_bci != standard_entry_bci); |
| int id; |
| if (method->is_native()) { |
| assert(!is_osr, "can't be osr"); |
| // Adapters, native wrappers and method handle intrinsics |
| // should be generated always. |
| return Atomic::add(1, &_compilation_id); |
| } else if (CICountOSR && is_osr) { |
| id = Atomic::add(1, &_osr_compilation_id); |
| if (CIStartOSR <= id && id < CIStopOSR) { |
| return id; |
| } |
| } else { |
| id = Atomic::add(1, &_compilation_id); |
| if (CIStart <= id && id < CIStop) { |
| return id; |
| } |
| } |
| |
| // Method was not in the appropriate compilation range. |
| method->set_not_compilable_quietly(); |
| return 0; |
| #else |
| // CICountOSR is a develop flag and set to 'false' by default. In a product built, |
| // only _compilation_id is incremented. |
| return Atomic::add(1, &_compilation_id); |
| #endif |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::assign_compile_id_unlocked |
| // |
| // Public wrapper for assign_compile_id that acquires the needed locks |
| uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { |
| MutexLocker locker(MethodCompileQueue_lock, thread); |
| return assign_compile_id(method, osr_bci); |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::preload_classes |
| void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { |
| // Move this code over from c1_Compiler.cpp |
| ShouldNotReachHere(); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::create_compile_task |
| // |
| // Create a CompileTask object representing the current request for |
| // compilation. Add this task to the queue. |
| CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, |
| int compile_id, |
| const methodHandle& method, |
| int osr_bci, |
| int comp_level, |
| const methodHandle& hot_method, |
| int hot_count, |
| CompileTask::CompileReason compile_reason, |
| bool blocking) { |
| CompileTask* new_task = CompileTask::allocate(); |
| new_task->initialize(compile_id, method, osr_bci, comp_level, |
| hot_method, hot_count, compile_reason, |
| blocking); |
| queue->add(new_task); |
| return new_task; |
| } |
| |
| #if INCLUDE_JVMCI |
| // The number of milliseconds to wait before checking if |
| // JVMCI compilation has made progress. |
| static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500; |
| |
| // The number of JVMCI compilation progress checks that must fail |
| // before unblocking a thread waiting for a blocking compilation. |
| static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5; |
| |
| /** |
| * Waits for a JVMCI compiler to complete a given task. This thread |
| * waits until either the task completes or it sees no JVMCI compilation |
| * progress for N consecutive milliseconds where N is |
| * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * |
| * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. |
| * |
| * @return true if this thread needs to free/recycle the task |
| */ |
| bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { |
| MutexLocker waiter(task->lock(), thread); |
| int progress_wait_attempts = 0; |
| int methods_compiled = jvmci->methods_compiled(); |
| while (!task->is_complete() && !is_compilation_disabled_forever() && |
| task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { |
| CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); |
| |
| bool progress; |
| if (jvmci_compiler_thread != NULL) { |
| // If the JVMCI compiler thread is not blocked, we deem it to be making progress. |
| progress = jvmci_compiler_thread->thread_state() != _thread_blocked; |
| } else { |
| // Still waiting on JVMCI compiler queue. This thread may be holding a lock |
| // that all JVMCI compiler threads are blocked on. We use the counter for |
| // successful JVMCI compilations to determine whether JVMCI compilation |
| // is still making progress through the JVMCI compiler queue. |
| progress = jvmci->methods_compiled() != methods_compiled; |
| } |
| |
| if (!progress) { |
| if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { |
| if (PrintCompilation) { |
| task->print(tty, "wait for blocking compilation timed out"); |
| } |
| break; |
| } |
| } else { |
| progress_wait_attempts = 0; |
| if (jvmci_compiler_thread == NULL) { |
| methods_compiled = jvmci->methods_compiled(); |
| } |
| } |
| } |
| task->clear_waiter(); |
| return task->is_complete(); |
| } |
| #endif |
| |
| /** |
| * Wait for the compilation task to complete. |
| */ |
| void CompileBroker::wait_for_completion(CompileTask* task) { |
| if (CIPrintCompileQueue) { |
| ttyLocker ttyl; |
| tty->print_cr("BLOCKING FOR COMPILE"); |
| } |
| |
| assert(task->is_blocking(), "can only wait on blocking task"); |
| |
| JavaThread* thread = JavaThread::current(); |
| thread->set_blocked_on_compilation(true); |
| |
| methodHandle method(thread, task->method()); |
| bool free_task; |
| #if INCLUDE_JVMCI |
| AbstractCompiler* comp = compiler(task->comp_level()); |
| if (comp->is_jvmci()) { |
| free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); |
| } else |
| #endif |
| { |
| MutexLocker waiter(task->lock(), thread); |
| free_task = true; |
| while (!task->is_complete() && !is_compilation_disabled_forever()) { |
| task->lock()->wait(); |
| } |
| } |
| |
| thread->set_blocked_on_compilation(false); |
| if (free_task) { |
| if (is_compilation_disabled_forever()) { |
| CompileTask::free(task); |
| return; |
| } |
| |
| // It is harmless to check this status without the lock, because |
| // completion is a stable property (until the task object is recycled). |
| assert(task->is_complete(), "Compilation should have completed"); |
| assert(task->code_handle() == NULL, "must be reset"); |
| |
| // By convention, the waiter is responsible for recycling a |
| // blocking CompileTask. Since there is only one waiter ever |
| // waiting on a CompileTask, we know that no one else will |
| // be using this CompileTask; we can free it. |
| CompileTask::free(task); |
| } |
| } |
| |
| /** |
| * Initialize compiler thread(s) + compiler object(s). The postcondition |
| * of this function is that the compiler runtimes are initialized and that |
| * compiler threads can start compiling. |
| */ |
| bool CompileBroker::init_compiler_runtime() { |
| CompilerThread* thread = CompilerThread::current(); |
| AbstractCompiler* comp = thread->compiler(); |
| // Final sanity check - the compiler object must exist |
| guarantee(comp != NULL, "Compiler object must exist"); |
| |
| int system_dictionary_modification_counter; |
| { |
| MutexLocker locker(Compile_lock, thread); |
| system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); |
| } |
| |
| { |
| // Must switch to native to allocate ci_env |
| ThreadToNativeFromVM ttn(thread); |
| ciEnv ci_env(NULL, system_dictionary_modification_counter); |
| // Cache Jvmti state |
| ci_env.cache_jvmti_state(); |
| // Cache DTrace flags |
| ci_env.cache_dtrace_flags(); |
| |
| // Switch back to VM state to do compiler initialization |
| ThreadInVMfromNative tv(thread); |
| ResetNoHandleMark rnhm; |
| |
| if (!comp->is_shark()) { |
| // Perform per-thread and global initializations |
| comp->initialize(); |
| } |
| } |
| |
| if (comp->is_failed()) { |
| disable_compilation_forever(); |
| // If compiler initialization failed, no compiler thread that is specific to a |
| // particular compiler runtime will ever start to compile methods. |
| shutdown_compiler_runtime(comp, thread); |
| return false; |
| } |
| |
| // C1 specific check |
| if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { |
| warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * If C1 and/or C2 initialization failed, we shut down all compilation. |
| * We do this to keep things simple. This can be changed if it ever turns |
| * out to be a problem. |
| */ |
| void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { |
| // Free buffer blob, if allocated |
| if (thread->get_buffer_blob() != NULL) { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| CodeCache::free(thread->get_buffer_blob()); |
| } |
| |
| if (comp->should_perform_shutdown()) { |
| // There are two reasons for shutting down the compiler |
| // 1) compiler runtime initialization failed |
| // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing |
| warning("%s initialization failed. Shutting down all compilers", comp->name()); |
| |
| // Only one thread per compiler runtime object enters here |
| // Set state to shut down |
| comp->set_shut_down(); |
| |
| // Delete all queued compilation tasks to make compiler threads exit faster. |
| if (_c1_compile_queue != NULL) { |
| _c1_compile_queue->free_all(); |
| } |
| |
| if (_c2_compile_queue != NULL) { |
| _c2_compile_queue->free_all(); |
| } |
| |
| // Set flags so that we continue execution with using interpreter only. |
| UseCompiler = false; |
| UseInterpreter = true; |
| |
| // We could delete compiler runtimes also. However, there are references to |
| // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then |
| // fail. This can be done later if necessary. |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::compiler_thread_loop |
| // |
| // The main loop run by a CompilerThread. |
| void CompileBroker::compiler_thread_loop() { |
| CompilerThread* thread = CompilerThread::current(); |
| CompileQueue* queue = thread->queue(); |
| // For the thread that initializes the ciObjectFactory |
| // this resource mark holds all the shared objects |
| ResourceMark rm; |
| |
| // First thread to get here will initialize the compiler interface |
| |
| { |
| ASSERT_IN_VM; |
| MutexLocker only_one (CompileThread_lock, thread); |
| if (!ciObjectFactory::is_initialized()) { |
| ciObjectFactory::initialize(); |
| } |
| } |
| |
| // Open a log. |
| if (LogCompilation) { |
| init_compiler_thread_log(); |
| } |
| CompileLog* log = thread->log(); |
| if (log != NULL) { |
| log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", |
| thread->name(), |
| os::current_thread_id(), |
| os::current_process_id()); |
| log->stamp(); |
| log->end_elem(); |
| } |
| |
| // If compiler thread/runtime initialization fails, exit the compiler thread |
| if (!init_compiler_runtime()) { |
| return; |
| } |
| |
| // Poll for new compilation tasks as long as the JVM runs. Compilation |
| // should only be disabled if something went wrong while initializing the |
| // compiler runtimes. This, in turn, should not happen. The only known case |
| // when compiler runtime initialization fails is if there is not enough free |
| // space in the code cache to generate the necessary stubs, etc. |
| while (!is_compilation_disabled_forever()) { |
| // We need this HandleMark to avoid leaking VM handles. |
| HandleMark hm(thread); |
| |
| CompileTask* task = queue->get(); |
| if (task == NULL) { |
| continue; |
| } |
| |
| // Give compiler threads an extra quanta. They tend to be bursty and |
| // this helps the compiler to finish up the job. |
| if (CompilerThreadHintNoPreempt) { |
| os::hint_no_preempt(); |
| } |
| |
| // Assign the task to the current thread. Mark this compilation |
| // thread as active for the profiler. |
| CompileTaskWrapper ctw(task); |
| nmethodLocker result_handle; // (handle for the nmethod produced by this task) |
| task->set_code_handle(&result_handle); |
| methodHandle method(thread, task->method()); |
| |
| // Never compile a method if breakpoints are present in it |
| if (method()->number_of_breakpoints() == 0) { |
| // Compile the method. |
| if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { |
| invoke_compiler_on_method(task); |
| } else { |
| // After compilation is disabled, remove remaining methods from queue |
| method->clear_queued_for_compilation(); |
| task->set_failure_reason("compilation is disabled"); |
| } |
| } |
| } |
| |
| // Shut down compiler runtime |
| shutdown_compiler_runtime(thread->compiler(), thread); |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::init_compiler_thread_log |
| // |
| // Set up state required by +LogCompilation. |
| void CompileBroker::init_compiler_thread_log() { |
| CompilerThread* thread = CompilerThread::current(); |
| char file_name[4*K]; |
| FILE* fp = NULL; |
| intx thread_id = os::current_thread_id(); |
| for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { |
| const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); |
| if (dir == NULL) { |
| jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", |
| thread_id, os::current_process_id()); |
| } else { |
| jio_snprintf(file_name, sizeof(file_name), |
| "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, |
| os::file_separator(), thread_id, os::current_process_id()); |
| } |
| |
| fp = fopen(file_name, "wt"); |
| if (fp != NULL) { |
| if (LogCompilation && Verbose) { |
| tty->print_cr("Opening compilation log %s", file_name); |
| } |
| CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); |
| if (log == NULL) { |
| fclose(fp); |
| return; |
| } |
| thread->init_log(log); |
| |
| if (xtty != NULL) { |
| ttyLocker ttyl; |
| // Record any per thread log files |
| xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); |
| } |
| return; |
| } |
| } |
| warning("Cannot open log file: %s", file_name); |
| } |
| |
| void CompileBroker::log_metaspace_failure() { |
| const char* message = "some methods may not be compiled because metaspace " |
| "is out of memory"; |
| if (_compilation_log != NULL) { |
| _compilation_log->log_metaspace_failure(message); |
| } |
| if (PrintCompilation) { |
| tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); |
| } |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::set_should_block |
| // |
| // Set _should_block. |
| // Call this from the VM, with Threads_lock held and a safepoint requested. |
| void CompileBroker::set_should_block() { |
| assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); |
| assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); |
| #ifndef PRODUCT |
| if (PrintCompilation && (Verbose || WizardMode)) |
| tty->print_cr("notifying compiler thread pool to block"); |
| #endif |
| _should_block = true; |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::maybe_block |
| // |
| // Call this from the compiler at convenient points, to poll for _should_block. |
| void CompileBroker::maybe_block() { |
| if (_should_block) { |
| #ifndef PRODUCT |
| if (PrintCompilation && (Verbose || WizardMode)) |
| tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); |
| #endif |
| ThreadInVMfromNative tivfn(JavaThread::current()); |
| } |
| } |
| |
| // wrapper for CodeCache::print_summary() |
| static void codecache_print(bool detailed) |
| { |
| ResourceMark rm; |
| stringStream s; |
| // Dump code cache into a buffer before locking the tty, |
| { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| CodeCache::print_summary(&s, detailed); |
| } |
| ttyLocker ttyl; |
| tty->print("%s", s.as_string()); |
| } |
| |
| // wrapper for CodeCache::print_summary() using outputStream |
| static void codecache_print(outputStream* out, bool detailed) { |
| ResourceMark rm; |
| stringStream s; |
| |
| // Dump code cache into a buffer |
| { |
| MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); |
| CodeCache::print_summary(&s, detailed); |
| } |
| |
| char* remaining_log = s.as_string(); |
| while (*remaining_log != '\0') { |
| char* eol = strchr(remaining_log, '\n'); |
| if (eol == NULL) { |
| out->print_cr("%s", remaining_log); |
| remaining_log = remaining_log + strlen(remaining_log); |
| } else { |
| *eol = '\0'; |
| out->print_cr("%s", remaining_log); |
| remaining_log = eol + 1; |
| } |
| } |
| } |
| |
| void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) { |
| |
| if (success) { |
| task->mark_success(); |
| if (ci_env != NULL) { |
| task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); |
| } |
| if (_compilation_log != NULL) { |
| nmethod* code = task->code(); |
| if (code != NULL) { |
| _compilation_log->log_nmethod(thread, code); |
| } |
| } |
| } |
| |
| // simulate crash during compilation |
| assert(task->compile_id() != CICrashAt, "just as planned"); |
| if (event.should_commit()) { |
| event.set_method(task->method()); |
| event.set_compileId(task->compile_id()); |
| event.set_compileLevel(task->comp_level()); |
| event.set_succeded(task->is_success()); |
| event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); |
| event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); |
| event.set_inlinedBytes(task->num_inlined_bytecodes()); |
| event.commit(); |
| } |
| } |
| |
| int DirectivesStack::_depth = 0; |
| CompilerDirectives* DirectivesStack::_top = NULL; |
| CompilerDirectives* DirectivesStack::_bottom = NULL; |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::invoke_compiler_on_method |
| // |
| // Compile a method. |
| // |
| void CompileBroker::invoke_compiler_on_method(CompileTask* task) { |
| task->print_ul(); |
| if (PrintCompilation) { |
| ResourceMark rm; |
| task->print_tty(); |
| } |
| elapsedTimer time; |
| |
| CompilerThread* thread = CompilerThread::current(); |
| ResourceMark rm(thread); |
| |
| if (LogEvents) { |
| _compilation_log->log_compile(thread, task); |
| } |
| |
| // Common flags. |
| uint compile_id = task->compile_id(); |
| int osr_bci = task->osr_bci(); |
| bool is_osr = (osr_bci != standard_entry_bci); |
| bool should_log = (thread->log() != NULL); |
| bool should_break = false; |
| const int task_level = task->comp_level(); |
| AbstractCompiler* comp = task->compiler(); |
| |
| DirectiveSet* directive; |
| { |
| // create the handle inside it's own block so it can't |
| // accidentally be referenced once the thread transitions to |
| // native. The NoHandleMark before the transition should catch |
| // any cases where this occurs in the future. |
| methodHandle method(thread, task->method()); |
| assert(!method->is_native(), "no longer compile natives"); |
| |
| // Look up matching directives |
| directive = DirectivesStack::getMatchingDirective(method, comp); |
| |
| // Save information about this method in case of failure. |
| set_last_compile(thread, method, is_osr, task_level); |
| |
| DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); |
| } |
| |
| should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); |
| if (should_log && !directive->LogOption) { |
| should_log = false; |
| } |
| |
| // Allocate a new set of JNI handles. |
| push_jni_handle_block(); |
| Method* target_handle = task->method(); |
| int compilable = ciEnv::MethodCompilable; |
| const char* failure_reason = NULL; |
| const char* retry_message = NULL; |
| |
| int system_dictionary_modification_counter; |
| { |
| MutexLocker locker(Compile_lock, thread); |
| system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); |
| } |
| |
| #if INCLUDE_JVMCI |
| if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { |
| JVMCICompiler* jvmci = (JVMCICompiler*) comp; |
| |
| TraceTime t1("compilation", &time); |
| EventCompilation event; |
| |
| JVMCIEnv env(task, system_dictionary_modification_counter); |
| methodHandle method(thread, target_handle); |
| jvmci->compile_method(method, osr_bci, &env); |
| |
| post_compile(thread, task, event, task->code() != NULL, NULL); |
| |
| failure_reason = env.failure_reason(); |
| if (!env.retryable()) { |
| retry_message = "not retryable"; |
| compilable = ciEnv::MethodCompilable_not_at_tier; |
| } |
| |
| } else |
| #endif // INCLUDE_JVMCI |
| { |
| NoHandleMark nhm; |
| ThreadToNativeFromVM ttn(thread); |
| |
| ciEnv ci_env(task, system_dictionary_modification_counter); |
| if (should_break) { |
| ci_env.set_break_at_compile(true); |
| } |
| if (should_log) { |
| ci_env.set_log(thread->log()); |
| } |
| assert(thread->env() == &ci_env, "set by ci_env"); |
| // The thread-env() field is cleared in ~CompileTaskWrapper. |
| |
| // Cache Jvmti state |
| ci_env.cache_jvmti_state(); |
| |
| // Cache DTrace flags |
| ci_env.cache_dtrace_flags(); |
| |
| ciMethod* target = ci_env.get_method_from_handle(target_handle); |
| |
| TraceTime t1("compilation", &time); |
| EventCompilation event; |
| |
| if (comp == NULL) { |
| ci_env.record_method_not_compilable("no compiler", !TieredCompilation); |
| } else { |
| if (WhiteBoxAPI && WhiteBox::compilation_locked) { |
| MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); |
| while (WhiteBox::compilation_locked) { |
| locker.wait(Mutex::_no_safepoint_check_flag); |
| } |
| } |
| comp->compile_method(&ci_env, target, osr_bci, directive); |
| } |
| |
| if (!ci_env.failing() && task->code() == NULL) { |
| //assert(false, "compiler should always document failure"); |
| // The compiler elected, without comment, not to register a result. |
| // Do not attempt further compilations of this method. |
| ci_env.record_method_not_compilable("compile failed", !TieredCompilation); |
| } |
| |
| // Copy this bit to the enclosing block: |
| compilable = ci_env.compilable(); |
| |
| if (ci_env.failing()) { |
| failure_reason = ci_env.failure_reason(); |
| retry_message = ci_env.retry_message(); |
| ci_env.report_failure(failure_reason); |
| } |
| |
| post_compile(thread, task, event, !ci_env.failing(), &ci_env); |
| } |
| // Remove the JNI handle block after the ciEnv destructor has run in |
| // the previous block. |
| pop_jni_handle_block(); |
| |
| if (failure_reason != NULL) { |
| task->set_failure_reason(failure_reason); |
| if (_compilation_log != NULL) { |
| _compilation_log->log_failure(thread, task, failure_reason, retry_message); |
| } |
| if (PrintCompilation) { |
| FormatBufferResource msg = retry_message != NULL ? |
| FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : |
| FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); |
| task->print(tty, msg); |
| } |
| } |
| |
| methodHandle method(thread, task->method()); |
| |
| DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); |
| |
| collect_statistics(thread, time, task); |
| |
| nmethod* nm = task->code(); |
| if (nm != NULL) { |
| nm->maybe_print_nmethod(directive); |
| } |
| DirectivesStack::release(directive); |
| |
| if (PrintCompilation && PrintCompilation2) { |
| tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp |
| tty->print("%4d ", compile_id); // print compilation number |
| tty->print("%s ", (is_osr ? "%" : " ")); |
| if (task->code() != NULL) { |
| tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); |
| } |
| tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); |
| } |
| |
| Log(compilation, codecache) log; |
| if (log.is_debug()) { |
| LogStream ls(log.debug()); |
| codecache_print(&ls, /* detailed= */ false); |
| } |
| if (PrintCodeCacheOnCompilation) { |
| codecache_print(/* detailed= */ false); |
| } |
| // Disable compilation, if required. |
| switch (compilable) { |
| case ciEnv::MethodCompilable_never: |
| if (is_osr) |
| method->set_not_osr_compilable_quietly(); |
| else |
| method->set_not_compilable_quietly(); |
| break; |
| case ciEnv::MethodCompilable_not_at_tier: |
| if (is_osr) |
| method->set_not_osr_compilable_quietly(task_level); |
| else |
| method->set_not_compilable_quietly(task_level); |
| break; |
| } |
| |
| // Note that the queued_for_compilation bits are cleared without |
| // protection of a mutex. [They were set by the requester thread, |
| // when adding the task to the compile queue -- at which time the |
| // compile queue lock was held. Subsequently, we acquired the compile |
| // queue lock to get this task off the compile queue; thus (to belabour |
| // the point somewhat) our clearing of the bits must be occurring |
| // only after the setting of the bits. See also 14012000 above. |
| method->clear_queued_for_compilation(); |
| |
| #ifdef ASSERT |
| if (CollectedHeap::fired_fake_oom()) { |
| // The current compile received a fake OOM during compilation so |
| // go ahead and exit the VM since the test apparently succeeded |
| tty->print_cr("*** Shutting down VM after successful fake OOM"); |
| vm_exit(0); |
| } |
| #endif |
| } |
| |
| /** |
| * The CodeCache is full. Print warning and disable compilation. |
| * Schedule code cache cleaning so compilation can continue later. |
| * This function needs to be called only from CodeCache::allocate(), |
| * since we currently handle a full code cache uniformly. |
| */ |
| void CompileBroker::handle_full_code_cache(int code_blob_type) { |
| UseInterpreter = true; |
| if (UseCompiler || AlwaysCompileLoopMethods ) { |
| if (xtty != NULL) { |
| ResourceMark rm; |
| stringStream s; |
| // Dump code cache state into a buffer before locking the tty, |
| // because log_state() will use locks causing lock conflicts. |
| CodeCache::log_state(&s); |
| // Lock to prevent tearing |
| ttyLocker ttyl; |
| xtty->begin_elem("code_cache_full"); |
| xtty->print("%s", s.as_string()); |
| xtty->stamp(); |
| xtty->end_elem(); |
| } |
| |
| #ifndef PRODUCT |
| if (CompileTheWorld || ExitOnFullCodeCache) { |
| codecache_print(/* detailed= */ true); |
| before_exit(JavaThread::current()); |
| exit_globals(); // will delete tty |
| vm_direct_exit(CompileTheWorld ? 0 : 1); |
| } |
| #endif |
| if (UseCodeCacheFlushing) { |
| // Since code cache is full, immediately stop new compiles |
| if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { |
| NMethodSweeper::log_sweep("disable_compiler"); |
| } |
| } else { |
| disable_compilation_forever(); |
| } |
| |
| CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); |
| } |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::set_last_compile |
| // |
| // Record this compilation for debugging purposes. |
| void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { |
| ResourceMark rm; |
| char* method_name = method->name()->as_C_string(); |
| strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); |
| _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated |
| char current_method[CompilerCounters::cmname_buffer_length]; |
| size_t maxLen = CompilerCounters::cmname_buffer_length; |
| |
| if (UsePerfData) { |
| const char* class_name = method->method_holder()->name()->as_C_string(); |
| |
| size_t s1len = strlen(class_name); |
| size_t s2len = strlen(method_name); |
| |
| // check if we need to truncate the string |
| if (s1len + s2len + 2 > maxLen) { |
| |
| // the strategy is to lop off the leading characters of the |
| // class name and the trailing characters of the method name. |
| |
| if (s2len + 2 > maxLen) { |
| // lop of the entire class name string, let snprintf handle |
| // truncation of the method name. |
| class_name += s1len; // null string |
| } |
| else { |
| // lop off the extra characters from the front of the class name |
| class_name += ((s1len + s2len + 2) - maxLen); |
| } |
| } |
| |
| jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); |
| } |
| |
| if (CICountOSR && is_osr) { |
| _last_compile_type = osr_compile; |
| } else { |
| _last_compile_type = normal_compile; |
| } |
| _last_compile_level = comp_level; |
| |
| if (UsePerfData) { |
| CompilerCounters* counters = thread->counters(); |
| counters->set_current_method(current_method); |
| counters->set_compile_type((jlong)_last_compile_type); |
| } |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::push_jni_handle_block |
| // |
| // Push on a new block of JNI handles. |
| void CompileBroker::push_jni_handle_block() { |
| JavaThread* thread = JavaThread::current(); |
| |
| // Allocate a new block for JNI handles. |
| // Inlined code from jni_PushLocalFrame() |
| JNIHandleBlock* java_handles = thread->active_handles(); |
| JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); |
| assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); |
| compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. |
| thread->set_active_handles(compile_handles); |
| } |
| |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::pop_jni_handle_block |
| // |
| // Pop off the current block of JNI handles. |
| void CompileBroker::pop_jni_handle_block() { |
| JavaThread* thread = JavaThread::current(); |
| |
| // Release our JNI handle block |
| JNIHandleBlock* compile_handles = thread->active_handles(); |
| JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); |
| thread->set_active_handles(java_handles); |
| compile_handles->set_pop_frame_link(NULL); |
| JNIHandleBlock::release_block(compile_handles, thread); // may block |
| } |
| |
| // ------------------------------------------------------------------ |
| // CompileBroker::collect_statistics |
| // |
| // Collect statistics about the compilation. |
| |
| void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { |
| bool success = task->is_success(); |
| methodHandle method (thread, task->method()); |
| uint compile_id = task->compile_id(); |
| bool is_osr = (task->osr_bci() != standard_entry_bci); |
| nmethod* code = task->code(); |
| CompilerCounters* counters = thread->counters(); |
| |
| assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); |
| MutexLocker locker(CompileStatistics_lock); |
| |
| // _perf variables are production performance counters which are |
| // updated regardless of the setting of the CITime and CITimeEach flags |
| // |
| |
| // account all time, including bailouts and failures in this counter; |
| // C1 and C2 counters are counting both successful and unsuccessful compiles |
| _t_total_compilation.add(time); |
| |
| if (!success) { |
| _total_bailout_count++; |
| if (UsePerfData) { |
| _perf_last_failed_method->set_value(counters->current_method()); |
| _perf_last_failed_type->set_value(counters->compile_type()); |
| _perf_total_bailout_count->inc(); |
| } |
| _t_bailedout_compilation.add(time); |
| } else if (code == NULL) { |
| if (UsePerfData) { |
| _perf_last_invalidated_method->set_value(counters->current_method()); |
| _perf_last_invalidated_type->set_value(counters->compile_type()); |
| _perf_total_invalidated_count->inc(); |
| } |
| _total_invalidated_count++; |
| _t_invalidated_compilation.add(time); |
| } else { |
| // Compilation succeeded |
| |
| // update compilation ticks - used by the implementation of |
| // java.lang.management.CompilationMBean |
| _perf_total_compilation->inc(time.ticks()); |
| _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; |
| |
| if (CITime) { |
| int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); |
| if (is_osr) { |
| _t_osr_compilation.add(time); |
| _sum_osr_bytes_compiled += bytes_compiled; |
| } else { |
| _t_standard_compilation.add(time); |
| _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); |
| } |
| |
| #if INCLUDE_JVMCI |
| AbstractCompiler* comp = compiler(task->comp_level()); |
| if (comp) { |
| CompilerStatistics* stats = comp->stats(); |
| if (stats) { |
| if (is_osr) { |
| stats->_osr.update(time, bytes_compiled); |
| } else { |
| stats->_standard.update(time, bytes_compiled); |
| } |
| stats->_nmethods_size += code->total_size(); |
| stats->_nmethods_code_size += code->insts_size(); |
| } else { // if (!stats) |
| assert(false, "Compiler statistics object must exist"); |
| } |
| } else { // if (!comp) |
| assert(false, "Compiler object must exist"); |
| } |
| #endif // INCLUDE_JVMCI |
| } |
| |
| if (UsePerfData) { |
| // save the name of the last method compiled |
| _perf_last_method->set_value(counters->current_method()); |
| _perf_last_compile_type->set_value(counters->compile_type()); |
| _perf_last_compile_size->set_value(method->code_size() + |
| task->num_inlined_bytecodes()); |
| if (is_osr) { |
| _perf_osr_compilation->inc(time.ticks()); |
| _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); |
| } else { |
| _perf_standard_compilation->inc(time.ticks()); |
| _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); |
| } |
| } |
| |
| if (CITimeEach) { |
| float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); |
| tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", |
| compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); |
| } |
| |
| // Collect counts of successful compilations |
| _sum_nmethod_size += code->total_size(); |
| _sum_nmethod_code_size += code->insts_size(); |
| _total_compile_count++; |
| |
| if (UsePerfData) { |
| _perf_sum_nmethod_size->inc( code->total_size()); |
| _perf_sum_nmethod_code_size->inc(code->insts_size()); |
| _perf_total_compile_count->inc(); |
| } |
| |
| if (is_osr) { |
| if (UsePerfData) _perf_total_osr_compile_count->inc(); |
| _total_osr_compile_count++; |
| } else { |
| if (UsePerfData) _perf_total_standard_compile_count->inc(); |
| _total_standard_compile_count++; |
| } |
| } |
| // set the current method for the thread to null |
| if (UsePerfData) counters->set_current_method(""); |
| } |
| |
| const char* CompileBroker::compiler_name(int comp_level) { |
| AbstractCompiler *comp = CompileBroker::compiler(comp_level); |
| if (comp == NULL) { |
| return "no compiler"; |
| } else { |
| return (comp->name()); |
| } |
| } |
| |
| #if INCLUDE_JVMCI |
| void CompileBroker::print_times(AbstractCompiler* comp) { |
| CompilerStatistics* stats = comp->stats(); |
| if (stats) { |
| tty->print_cr(" %s {speed: %d 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}", |
| comp->name(), stats->bytes_per_second(), |
| stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, |
| stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, |
| stats->_nmethods_size, stats->_nmethods_code_size); |
| } else { // if (!stats) |
| assert(false, "Compiler statistics object must exist"); |
| } |
| comp->print_timers(); |
| } |
| #endif // INCLUDE_JVMCI |
| |
| void CompileBroker::print_times(bool per_compiler, bool aggregate) { |
| #if INCLUDE_JVMCI |
| elapsedTimer standard_compilation; |
| elapsedTimer total_compilation; |
| elapsedTimer osr_compilation; |
| |
| int standard_bytes_compiled = 0; |
| int osr_bytes_compiled = 0; |
| |
| int standard_compile_count = 0; |
| int osr_compile_count = 0; |
| int total_compile_count = 0; |
| |
| int nmethods_size = 0; |
| int nmethods_code_size = 0; |
| bool printedHeader = false; |
| |
| for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { |
| AbstractCompiler* comp = _compilers[i]; |
| if (comp != NULL) { |
| if (per_compiler && aggregate && !printedHeader) { |
| printedHeader = true; |
| tty->cr(); |
| tty->print_cr("Individual compiler times (for compiled methods only)"); |
| tty->print_cr("------------------------------------------------"); |
| tty->cr(); |
| } |
| CompilerStatistics* stats = comp->stats(); |
| |
| if (stats) { |
| standard_compilation.add(stats->_standard._time); |
| osr_compilation.add(stats->_osr._time); |
| |
| standard_bytes_compiled += stats->_standard._bytes; |
| osr_bytes_compiled += stats->_osr._bytes; |
| |
| standard_compile_count += stats->_standard._count; |
| osr_compile_count += stats->_osr._count; |
| |
| nmethods_size += stats->_nmethods_size; |
| nmethods_code_size += stats->_nmethods_code_size; |
| } else { // if (!stats) |
| assert(false, "Compiler statistics object must exist"); |
| } |
| |
| if (per_compiler) { |
| print_times(comp); |
| } |
| } |
| } |
| total_compile_count = osr_compile_count + standard_compile_count; |
| total_compilation.add(osr_compilation); |
| total_compilation.add(standard_compilation); |
| |
| // In hosted mode, print the JVMCI compiler specific counters manually. |
| if (!UseJVMCICompiler) { |
| JVMCICompiler::print_compilation_timers(); |
| } |
| #else // INCLUDE_JVMCI |
| elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; |
| elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; |
| elapsedTimer total_compilation = CompileBroker::_t_total_compilation; |
| |
| int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; |
| int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; |
| |
| int standard_compile_count = CompileBroker::_total_standard_compile_count; |
| int osr_compile_count = CompileBroker::_total_osr_compile_count; |
| int total_compile_count = CompileBroker::_total_compile_count; |
| |
| int nmethods_size = CompileBroker::_sum_nmethod_code_size; |
| int nmethods_code_size = CompileBroker::_sum_nmethod_size; |
| #endif // INCLUDE_JVMCI |
| |
| if (!aggregate) { |
| return; |
| } |
| tty->cr(); |
| tty->print_cr("Accumulated compiler times"); |
| tty->print_cr("----------------------------------------------------------"); |
| //0000000000111111111122222222223333333333444444444455555555556666666666 |
| //0123456789012345678901234567890123456789012345678901234567890123456789 |
| tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); |
| tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", |
| standard_compilation.seconds(), |
| standard_compilation.seconds() / standard_compile_count); |
| tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", |
| CompileBroker::_t_bailedout_compilation.seconds(), |
| CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); |
| tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", |
| osr_compilation.seconds(), |
| osr_compilation.seconds() / osr_compile_count); |
| tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", |
| CompileBroker::_t_invalidated_compilation.seconds(), |
| CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); |
| |
| AbstractCompiler *comp = compiler(CompLevel_simple); |
| if (comp != NULL) { |
| tty->cr(); |
| comp->print_timers(); |
| } |
| comp = compiler(CompLevel_full_optimization); |
| if (comp != NULL) { |
| tty->cr(); |
| comp->print_timers(); |
| } |
| tty->cr(); |
| tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); |
| tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); |
| tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); |
| int tcb = osr_bytes_compiled + standard_bytes_compiled; |
| tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); |
| tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); |
| tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); |
| double tcs = total_compilation.seconds(); |
| int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); |
| tty->print_cr(" Average compilation speed : %8d bytes/s", bps); |
| tty->cr(); |
| tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); |
| tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); |
| } |
| |
| // Debugging output for failure |
| void CompileBroker::print_last_compile() { |
| if (_last_compile_level != CompLevel_none && |
| compiler(_last_compile_level) != NULL && |
| _last_compile_type != no_compile) { |
| if (_last_compile_type == osr_compile) { |
| tty->print_cr("Last parse: [osr]%d+++(%d) %s", |
| _osr_compilation_id, _last_compile_level, _last_method_compiled); |
| } else { |
| tty->print_cr("Last parse: %d+++(%d) %s", |
| _compilation_id, _last_compile_level, _last_method_compiled); |
| } |
| } |
| } |