jdk8-mips64-public/hotspot: src/share/vm/compiler/compileBroker.cpp@e9ff18c4ace7 (annotated)

src/share/vm/compiler/compileBroker.cpp@e9ff18c4ace7 (annotated)

src/share/vm/compiler/compileBroker.cpp

Wed, 02 Jun 2010 22:45:42 -0700

author: jrose
date: Wed, 02 Jun 2010 22:45:42 -0700
changeset 1934: e9ff18c4ace7
parent 1907: c18cbe5936b8
parent 1933: ca3dceda776c
child 2047: d2ede61b7a12
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1999, 2010, 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 "incls/_precompiled.incl"
 #include "incls/_compileBroker.cpp.incl"
 #ifdef DTRACE_ENABLED
 // Only bother with this argument setup if dtrace is available
 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
   char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
   char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)              \
   {                                                                      \
     char* comp_name = (char*)(compiler)->name();                         \
     symbolOop klass_name = (method)->klass_name();                       \
     symbolOop name = (method)->name();                                   \
     symbolOop signature = (method)->signature();                         \
     HS_DTRACE_PROBE8(hotspot, method__compile__begin,                    \
       comp_name, strlen(comp_name),                                      \
       klass_name->bytes(), klass_name->utf8_length(),                    \
       name->bytes(), name->utf8_length(),                                \
       signature->bytes(), signature->utf8_length());                     \
   }
 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)       \
   {                                                                      \
     char* comp_name = (char*)(compiler)->name();                         \
     symbolOop klass_name = (method)->klass_name();                       \
     symbolOop name = (method)->name();                                   \
     symbolOop signature = (method)->signature();                         \
     HS_DTRACE_PROBE9(hotspot, method__compile__end,                      \
       comp_name, strlen(comp_name),                                      \
       klass_name->bytes(), klass_name->utf8_length(),                    \
       name->bytes(), name->utf8_length(),                                \
       signature->bytes(), signature->utf8_length(), (success));          \
   }
 #else //  ndef DTRACE_ENABLED
 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
 #endif // ndef DTRACE_ENABLED
 bool CompileBroker::_initialized = false;
 volatile bool CompileBroker::_should_block = false;
 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
 // The installed compiler(s)
 AbstractCompiler* CompileBroker::_compilers[2];
 // These counters are used for assigning id's to each compilation
 uint CompileBroker::_compilation_id        = 0;
 uint 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;
 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;
 CompileQueue* CompileBroker::_method_queue   = NULL;
 CompileTask*  CompileBroker::_task_free_list = NULL;
 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
 // CompileTaskWrapper
 //
 // Assign this task to the current thread.  Deallocate the task
 // when the compilation is complete.
 class CompileTaskWrapper : StackObj {
 public:
   CompileTaskWrapper(CompileTask* task);
   ~CompileTaskWrapper();
 };
 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
   CompilerThread* thread = CompilerThread::current();
   thread->set_task(task);
   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);
   DEBUG_ONLY(thread->set_env((ciEnv*)badAddress));
   if (task->is_blocking()) {
     MutexLocker notifier(task->lock(), thread);
     task->mark_complete();
     // Notify the waiting thread that the compilation has completed.
     task->lock()->notify_all();
   } else {
     task->mark_complete();
     // By convention, the compiling thread is responsible for
     // recycling a non-blocking CompileTask.
     CompileBroker::free_task(task);
   }
 }
 // ------------------------------------------------------------------
 // CompileTask::initialize
 void CompileTask::initialize(int compile_id,
                              methodHandle method,
                              int osr_bci,
                              int comp_level,
                              methodHandle hot_method,
                              int hot_count,
                              const char* comment,
                              bool is_blocking) {
   assert(!_lock->is_locked(), "bad locking");
   _compile_id = compile_id;
   _method = JNIHandles::make_global(method);
   _osr_bci = osr_bci;
   _is_blocking = is_blocking;
   _comp_level = comp_level;
   _num_inlined_bytecodes = 0;
   _is_complete = false;
   _is_success = false;
   _code_handle = NULL;
   _hot_method = NULL;
   _hot_count = hot_count;
   _time_queued = 0;  // tidy
   _comment = comment;
   if (LogCompilation) {
     _time_queued = os::elapsed_counter();
     if (hot_method.not_null()) {
       if (hot_method == method) {
         _hot_method = _method;
       } else {
         _hot_method = JNIHandles::make_global(hot_method);
       }
     }
   }
   _next = NULL;
 }
 // ------------------------------------------------------------------
 // CompileTask::code/set_code
 nmethod* CompileTask::code() const {
   if (_code_handle == NULL)  return NULL;
   return _code_handle->code();
 }
 void CompileTask::set_code(nmethod* nm) {
   if (_code_handle == NULL && nm == NULL)  return;
   guarantee(_code_handle != NULL, "");
   _code_handle->set_code(nm);
   if (nm == NULL)  _code_handle = NULL;  // drop the handle also
 }
 // ------------------------------------------------------------------
 // CompileTask::free
 void CompileTask::free() {
   set_code(NULL);
   assert(!_lock->is_locked(), "Should not be locked when freed");
   if (_hot_method != NULL && _hot_method != _method) {
     JNIHandles::destroy_global(_hot_method);
   }
   JNIHandles::destroy_global(_method);
 }
 // ------------------------------------------------------------------
 // CompileTask::print
 void CompileTask::print() {
   tty->print("<CompileTask compile_id=%d ", _compile_id);
   tty->print("method=");
   ((methodOop)JNIHandles::resolve(_method))->print_name(tty);
   tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
              _osr_bci, bool_to_str(_is_blocking),
              bool_to_str(_is_complete), bool_to_str(_is_success));
 }
 // ------------------------------------------------------------------
 // CompileTask::print_line_on_error
 //
 // This function is called by fatal error handler when the thread
 // causing troubles is a compiler thread.
 //
 // Do not grab any lock, do not allocate memory.
 //
 // Otherwise it's the same as CompileTask::print_line()
 //
 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
   methodOop method = (methodOop)JNIHandles::resolve(_method);
   // print compiler name
   st->print("%s:", CompileBroker::compiler(comp_level())->name());
   // print compilation number
   st->print("%3d", compile_id());
   // print method attributes
   const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
   { const char blocking_char  = is_blocking()                      ? 'b' : ' ';
     const char compile_type   = is_osr                             ? '%' : ' ';
     const char sync_char      = method->is_synchronized()          ? 's' : ' ';
     const char exception_char = method->has_exception_handler()    ? '!' : ' ';
     const char tier_char      =
       is_highest_tier_compile(comp_level())                        ? ' ' : ('0' + comp_level());
     st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
   }
   // Use buf to get method name and signature
   if (method != NULL) st->print("%s", method->name_and_sig_as_C_string(buf, buflen));
   // print osr_bci if any
   if (is_osr) st->print(" @ %d", osr_bci());
   // print method size
   st->print_cr(" (%d bytes)", method->code_size());
 }
 // ------------------------------------------------------------------
 // CompileTask::print_line
 void CompileTask::print_line() {
   Thread *thread = Thread::current();
   methodHandle method(thread,
                       (methodOop)JNIHandles::resolve(method_handle()));
   ResourceMark rm(thread);
   ttyLocker ttyl;  // keep the following output all in one block
   // print compiler name if requested
   if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
   // print compilation number
   tty->print("%3d", compile_id());
   // print method attributes
   const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
   { const char blocking_char  = is_blocking()                      ? 'b' : ' ';
     const char compile_type   = is_osr                             ? '%' : ' ';
     const char sync_char      = method->is_synchronized()          ? 's' : ' ';
     const char exception_char = method->has_exception_handler()    ? '!' : ' ';
     const char tier_char      =
       is_highest_tier_compile(comp_level())                        ? ' ' : ('0' + comp_level());
     tty->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
   }
   // print method name
   method->print_short_name(tty);
   // print osr_bci if any
   if (is_osr) tty->print(" @ %d", osr_bci());
   // print method size
   tty->print_cr(" (%d bytes)", method->code_size());
 }
 // ------------------------------------------------------------------
 // CompileTask::log_task
 void CompileTask::log_task(xmlStream* log) {
   Thread* thread = Thread::current();
   methodHandle method(thread,
                       (methodOop)JNIHandles::resolve(method_handle()));
   ResourceMark rm(thread);
   // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
   if (_compile_id != 0)   log->print(" compile_id='%d'", _compile_id);
   if (_osr_bci != CompileBroker::standard_entry_bci) {
     log->print(" compile_kind='osr'");  // same as nmethod::compile_kind
   } // else compile_kind='c2c'
   if (!method.is_null())  log->method(method);
   if (_osr_bci != CompileBroker::standard_entry_bci) {
     log->print(" osr_bci='%d'", _osr_bci);
   }
   if (_comp_level != CompLevel_highest_tier) {
     log->print(" level='%d'", _comp_level);
   }
   if (_is_blocking) {
     log->print(" blocking='1'");
   }
   log->stamp();
 }
 // ------------------------------------------------------------------
 // CompileTask::log_task_queued
 void CompileTask::log_task_queued() {
   Thread* thread = Thread::current();
   ttyLocker ttyl;
   ResourceMark rm(thread);
   xtty->begin_elem("task_queued");
   log_task(xtty);
   if (_comment != NULL) {
     xtty->print(" comment='%s'", _comment);
   }
   if (_hot_method != NULL) {
     methodHandle hot(thread,
                      (methodOop)JNIHandles::resolve(_hot_method));
     methodHandle method(thread,
                         (methodOop)JNIHandles::resolve(_method));
     if (hot() != method()) {
       xtty->method(hot);
     }
   }
   if (_hot_count != 0) {
     xtty->print(" hot_count='%d'", _hot_count);
   }
   xtty->end_elem();
 }
 // ------------------------------------------------------------------
 // CompileTask::log_task_start
 void CompileTask::log_task_start(CompileLog* log)   {
   log->begin_head("task");
   log_task(log);
   log->end_head();
 }
 // ------------------------------------------------------------------
 // CompileTask::log_task_done
 void CompileTask::log_task_done(CompileLog* log) {
   Thread* thread = Thread::current();
   methodHandle method(thread,
                       (methodOop)JNIHandles::resolve(method_handle()));
   ResourceMark rm(thread);
   // <task_done ... stamp='1.234'>  </task>
   nmethod* nm = code();
   log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
                   _is_success, nm == NULL ? 0 : nm->instructions_size(),
                   method->invocation_count());
   int bec = method->backedge_count();
   if (bec != 0)  log->print(" backedge_count='%d'", bec);
   // Note:  "_is_complete" is about to be set, but is not.
   if (_num_inlined_bytecodes != 0) {
     log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
   }
   log->stamp();
   log->end_elem();
   log->tail("task");
   log->clear_identities();   // next task will have different CI
   if (log->unflushed_count() > 2000) {
     log->flush();
   }
   log->mark_file_end();
 }
 // ------------------------------------------------------------------
 // CompileQueue::add
 //
 // Add a CompileTask to a CompileQueue
 void CompileQueue::add(CompileTask* task) {
   assert(lock()->owned_by_self(), "must own lock");
   task->set_next(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);
     _last = task;
   }
   // Mark the method as being in the compile queue.
   ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation();
   if (CIPrintCompileQueue) {
     print();
   }
   if (LogCompilation && xtty != NULL) {
     task->log_task_queued();
   }
   // Notify CompilerThreads that a task is available.
   lock()->notify();
 }
 // ------------------------------------------------------------------
 // CompileQueue::get
 //
 // Get the next CompileTask from a CompileQueue
 CompileTask* CompileQueue::get() {
   NMethodSweeper::possibly_sweep();
   MutexLocker locker(lock());
   // Wait for an available CompileTask.
   while (_first == NULL) {
     // There is no work to be done right now.  Wait.
     if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
       // During the emergency sweeping periods, wake up and sweep occasionally
       bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
       if (timedout) {
         MutexUnlocker ul(lock());
         // When otherwise not busy, run nmethod sweeping
         NMethodSweeper::possibly_sweep();
       }
     } else {
       // During normal operation no need to wake up on timer
       lock()->wait();
     }
   }
   CompileTask* task = _first;
   // Update queue first and last
   _first =_first->next();
   if (_first == NULL) {
     _last = NULL;
   }
   return task;
 }
 // ------------------------------------------------------------------
 // CompileQueue::print
 void CompileQueue::print() {
   tty->print_cr("Contents of %s", name());
   tty->print_cr("----------------------");
   CompileTask* task = _first;
   while (task != NULL) {
     task->print_line();
     task = task->next();
   }
   tty->print_cr("----------------------");
 }
 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
   _current_method[0] = '\0';
   _compile_type = CompileBroker::no_compile;
   if (UsePerfData) {
     ResourceMark rm;
     // create the thread instance name space string - don't create an
     // instance subspace if instance is -1 - keeps the adapterThread
     // counters  from having a ".0" namespace.
     const char* thread_i = (instance == -1) ? thread_name :
                       PerfDataManager::name_space(thread_name, instance);
     char* name = PerfDataManager::counter_name(thread_i, "method");
     _perf_current_method =
                PerfDataManager::create_string_variable(SUN_CI, name,
                                                        cmname_buffer_length,
                                                        _current_method, CHECK);
     name = PerfDataManager::counter_name(thread_i, "type");
     _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
                                                           PerfData::U_None,
                                                          (jlong)_compile_type,
                                                           CHECK);
     name = PerfDataManager::counter_name(thread_i, "time");
     _perf_time = PerfDataManager::create_counter(SUN_CI, name,
                                                  PerfData::U_Ticks, CHECK);
     name = PerfDataManager::counter_name(thread_i, "compiles");
     _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
                                                      PerfData::U_Events, CHECK);
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::compilation_init
 //
 // Initialize the Compilation object
 void CompileBroker::compilation_init() {
   _last_method_compiled[0] = '\0';
   // Set the interface to the current compiler(s).
 #ifdef COMPILER1
   _compilers[0] = new Compiler();
 #ifndef COMPILER2
   _compilers[1] = _compilers[0];
 #endif
 #endif // COMPILER1
 #ifdef COMPILER2
   _compilers[1] = new C2Compiler();
 #ifndef COMPILER1
   _compilers[0] = _compilers[1];
 #endif
 #endif // COMPILER2
   // Initialize the CompileTask free list
   _task_free_list = NULL;
   // Start the CompilerThreads
   init_compiler_threads(compiler_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;
 }
 // ------------------------------------------------------------------
 // CompileBroker::make_compiler_thread
 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
   CompilerThread* compiler_thread = NULL;
   klassOop k =
     SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(),
                                       true, CHECK_0);
   instanceKlassHandle klass (THREAD, 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,
                        vmSymbolHandles::object_initializer_name(),
                        vmSymbolHandles::threadgroup_string_void_signature(),
                        thread_group,
                        string,
                        CHECK_0);
   {
     MutexLocker mu(Threads_lock, THREAD);
     compiler_thread = new CompilerThread(queue, counters);
     // 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.
     if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
       vm_exit_during_initialization("java.lang.OutOfMemoryError",
                                     "unable to create new native thread");
     }
     java_lang_Thread::set_thread(thread_oop(), compiler_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);
     // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler
     // threads never have their OS priority set.  The assumption here is to
     // enable the Performance group to do flag tuning, figure out a suitable
     // CompilerThreadPriority, and then remove this 'if' statement (and
     // comment) and unconditionally set the priority.
     // Compiler Threads should be at the highest Priority
     if ( CompilerThreadPriority != -1 )
       os::set_native_priority( compiler_thread, CompilerThreadPriority );
     else
       os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]);
       // Note that I cannot call os::set_priority because it expects Java
       // priorities and I am *explicitly* using OS priorities so that it's
       // possible to set the compiler thread priority higher than any Java
       // thread.
     java_lang_Thread::set_daemon(thread_oop());
     compiler_thread->set_threadObj(thread_oop());
     Threads::add(compiler_thread);
     Thread::start(compiler_thread);
   }
   // Let go of Threads_lock before yielding
   os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
   return compiler_thread;
 }
 // ------------------------------------------------------------------
 // CompileBroker::init_compiler_threads
 //
 // Initialize the compilation queue
 void CompileBroker::init_compiler_threads(int compiler_count) {
   EXCEPTION_MARK;
   _method_queue  = new CompileQueue("MethodQueue",  MethodCompileQueue_lock);
   _method_threads =
     new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
   char name_buffer[256];
   int i;
   for (i = 0; i < compiler_count; i++) {
     // Create a name for our thread.
     sprintf(name_buffer, "CompilerThread%d", i);
     CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
     CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK);
     _method_threads->append(new_thread);
   }
   if (UsePerfData) {
     PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
                                      compiler_count, CHECK);
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::is_idle
 bool CompileBroker::is_idle() {
   if (!_method_queue->is_empty()) {
     return false;
   } else {
     int num_threads = _method_threads->length();
     for (int i=0; i<num_threads; i++) {
       if (_method_threads->at(i)->task() != NULL) {
         return false;
       }
     }
     // No pending or active compilations.
     return true;
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::compile_method
 //
 // Request compilation of a method.
 void CompileBroker::compile_method_base(methodHandle method,
                                         int osr_bci,
                                         int comp_level,
                                         methodHandle hot_method,
                                         int hot_count,
                                         const char* comment,
                                         TRAPS) {
   // do nothing if compiler thread(s) is not available
   if (!_initialized ) {
     return;
   }
   guarantee(!method->is_abstract(), "cannot compile abstract methods");
   assert(method->method_holder()->klass_part()->oop_is_instance(),
          "sanity check");
   assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
          "method holder must be initialized");
   if (CIPrintRequests) {
     tty->print("request: ");
     method->print_short_name(tty);
     if (osr_bci != InvocationEntryBci) {
       tty->print(" osr_bci: %d", osr_bci);
     }
     tty->print(" comment: %s count: %d", comment, 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;
   }
   // If this method is already in the compile queue, then
   // we do not block the current thread.
   if (compilation_is_in_queue(method, osr_bci)) {
     // 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;
   }
   // Outputs from the following MutexLocker block:
   CompileTask* task     = NULL;
   bool         blocking = false;
   // Acquire our lock.
   {
     MutexLocker locker(_method_queue->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, osr_bci)) {
       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.
     uint compile_id = assign_compile_id(method, osr_bci);
     if (compile_id == 0) {
       // The compilation falls outside the allowed range.
       return;
     }
     // Should this thread wait for completion of the compile?
     blocking = is_compile_blocking(method, osr_bci);
     // 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(_method_queue,
                                compile_id, method,
                                osr_bci, comp_level,
                                hot_method, hot_count, comment,
                                blocking);
   }
   if (blocking) {
     wait_for_completion(task);
   }
 }
 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
                                        methodHandle hot_method, int hot_count,
                                        const char* comment, TRAPS) {
   // make sure arguments make sense
   assert(method->method_holder()->klass_part()->oop_is_instance(), "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(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
   int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci);
 #ifdef TIERED
   if (TieredCompilation && StressTieredRuntime) {
     static int flipper = 0;
     if (is_even(flipper++)) {
       comp_level = CompLevel_fast_compile;
     } else {
       comp_level = CompLevel_full_optimization;
     }
   }
 #ifdef SPARC
   // QQQ FIX ME
   // C2 only returns long results in G1 and c1 doesn't understand so disallow c2
   // compiles of long results
   if (TieredCompilation && method()->result_type() == T_LONG) {
     comp_level = CompLevel_fast_compile;
   }
 #endif // SPARC
 #endif // TIERED
   // return quickly if possible
   // lock, make sure that the compilation
   // isn't prohibited in a straightforward way.
   if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
     return NULL;
   }
   if (osr_bci == InvocationEntryBci) {
     // standard compilation
     nmethod* method_code = method->code();
     if (method_code != NULL
 #ifdef TIERED
        && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile )
 #endif // TIERED
       ) {
       return method_code;
     }
     if (method->is_not_compilable(comp_level)) return NULL;
     if (UseCodeCacheFlushing) {
       nmethod* saved = CodeCache::find_and_remove_saved_code(method());
       if (saved != NULL) {
         method->set_code(method, saved);
         return saved;
       }
     }
   } else {
     // osr compilation
 #ifndef TIERED
     // seems like an assert of dubious value
     assert(comp_level == CompLevel_full_optimization,
            "all OSR compiles are assumed to be at a single compilation lavel");
 #endif // TIERED
     nmethod* nm = method->lookup_osr_nmethod_for(osr_bci);
     if (nm != NULL) return nm;
     if (method->is_not_osr_compilable()) return NULL;
   }
   assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
   // some prerequisites that are compiler specific
   if (compiler(comp_level)->is_c2()) {
     method->constants()->resolve_string_constants(CHECK_0);
     // Resolve all classes seen in the signature of the method
     // we are compiling.
     methodOopDesc::load_signature_classes(method, CHECK_0);
   }
   // 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()) {
     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();
   }
   // If the compiler is shut off due to code cache flushing or otherwise,
   // fail out now so blocking compiles dont hang the java thread
   if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
     method->invocation_counter()->decay();
     method->backedge_counter()->decay();
     return NULL;
   }
   // do the compilation
   if (method->is_native()) {
     if (!PreferInterpreterNativeStubs) {
       (void) AdapterHandlerLibrary::create_native_wrapper(method);
     } else {
       return NULL;
     }
   } else {
     compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0);
   }
   // return requested nmethod
   return osr_bci  == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci);
 }
 // ------------------------------------------------------------------
 // CompileBroker::compilation_is_complete
 //
 // See if compilation of this method is already complete.
 bool CompileBroker::compilation_is_complete(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()) {
       return true;
     } else {
       nmethod* result = method->lookup_osr_nmethod_for(osr_bci);
       return (result != NULL);
     }
   } else {
     if (method->is_not_compilable(comp_level)) {
       return true;
     } else {
       nmethod* result = method->code();
       if (result == NULL) return false;
 #ifdef TIERED
       if (comp_level == CompLevel_fast_compile) {
         // At worst the code is from c1
         return true;
       }
       // comp level must be full opt
       return result->is_compiled_by_c2();
 #endif // TIERED
       return true;
     }
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::compilation_is_in_queue
 //
 // 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 profitible, this may be done.
 bool CompileBroker::compilation_is_in_queue(methodHandle method,
                                           int          osr_bci) {
   return method->queued_for_compilation();
 }
 // ------------------------------------------------------------------
 // CompileBroker::compilation_is_prohibited
 //
 // See if this compilation is not allowed.
 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
   bool is_native = method->is_native();
   // Some compilers may not support the compilation of natives.
   // QQQ this needs some work ought to only record not compilable at
   // the specified level
   if (is_native &&
       (!CICompileNatives || !compiler(comp_level)->supports_native())) {
     method->set_not_compilable_quietly();
     return true;
   }
   bool is_osr = (osr_bci != standard_entry_bci);
   // Some compilers may not support on stack replacement.
   if (is_osr &&
       (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
     method->set_not_osr_compilable();
     return true;
   }
   // The method may be explicitly excluded by the user.
   bool quietly;
   if (CompilerOracle::should_exclude(method, quietly)) {
     if (!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_quietly();
   }
   return false;
 }
 // ------------------------------------------------------------------
 // CompileBroker::assign_compile_id
 //
 // Assign a serialized id number to this compilation request.  If the
 // number falls out of the allowed range, return a 0.  OSR
 // compilations may be numbered separately from regular compilations
 // if certain debugging flags are used.
 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
   assert(_method_queue->lock()->owner() == JavaThread::current(),
          "must hold the compilation queue lock");
   bool is_osr = (osr_bci != standard_entry_bci);
   assert(!method->is_native(), "no longer compile natives");
   uint id;
   if (CICountOSR && is_osr) {
     id = ++_osr_compilation_id;
     if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
       return id;
     }
   } else {
     id = ++_compilation_id;
     if ((uint)CIStart <= id && id < (uint)CIStop) {
       return id;
     }
   }
   // Method was not in the appropriate compilation range.
   method->set_not_compilable_quietly();
   return 0;
 }
 // ------------------------------------------------------------------
 // CompileBroker::is_compile_blocking
 //
 // Should the current thread be blocked until this compilation request
 // has been fulfilled?
 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
   return !BackgroundCompilation;
 }
 // ------------------------------------------------------------------
 // CompileBroker::preload_classes
 void CompileBroker::preload_classes(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,
                                               methodHandle  method,
                                               int           osr_bci,
                                               int           comp_level,
                                               methodHandle  hot_method,
                                               int           hot_count,
                                               const char*   comment,
                                               bool          blocking) {
   CompileTask* new_task = allocate_task();
   new_task->initialize(compile_id, method, osr_bci, comp_level,
                        hot_method, hot_count, comment,
                        blocking);
   queue->add(new_task);
   return new_task;
 }
 // ------------------------------------------------------------------
 // CompileBroker::allocate_task
 //
 // Allocate a CompileTask, from the free list if possible.
 CompileTask* CompileBroker::allocate_task() {
   MutexLocker locker(CompileTaskAlloc_lock);
   CompileTask* task = NULL;
   if (_task_free_list != NULL) {
     task = _task_free_list;
     _task_free_list = task->next();
     task->set_next(NULL);
   } else {
     task = new CompileTask();
     task->set_next(NULL);
   }
   return task;
 }
 // ------------------------------------------------------------------
 // CompileBroker::free_task
 //
 // Add a task to the free list.
 void CompileBroker::free_task(CompileTask* task) {
   MutexLocker locker(CompileTaskAlloc_lock);
   task->free();
   task->set_next(_task_free_list);
   _task_free_list = task;
 }
 // ------------------------------------------------------------------
 // CompileBroker::wait_for_completion
 //
 // Wait for the given method CompileTask to complete.
 void CompileBroker::wait_for_completion(CompileTask* task) {
   if (CIPrintCompileQueue) {
     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,
                       (methodOop)JNIHandles::resolve(task->method_handle()));
   {
     MutexLocker waiter(task->lock(), thread);
     while (!task->is_complete())
       task->lock()->wait();
   }
   // 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");
   thread->set_blocked_on_compilation(false);
   // 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.
   free_task(task);
 }
 // ------------------------------------------------------------------
 // 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
   if (!ciObjectFactory::is_initialized()) {
     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 thread='" UINTX_FORMAT "' process='%d'",
                     os::current_thread_id(),
                     os::current_process_id());
     log->stamp();
     log->end_elem();
   }
   while (true) {
     {
       // We need this HandleMark to avoid leaking VM handles.
       HandleMark hm(thread);
       if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
         // the code cache is really full
         handle_full_code_cache();
       } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
         // Attempt to start cleaning the code cache while there is still a little headroom
         NMethodSweeper::handle_full_code_cache(false);
       }
       CompileTask* task = queue->get();
       // 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();
       // trace per thread time and compile statistics
       CompilerCounters* counters = ((CompilerThread*)thread)->counters();
       PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
       // 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,
                      (methodOop)JNIHandles::resolve(task->method_handle()));
       // 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()) {
 #ifdef COMPILER1
           // Allow repeating compilations for the purpose of benchmarking
           // compile speed. This is not useful for customers.
           if (CompilationRepeat != 0) {
             int compile_count = CompilationRepeat;
             while (compile_count > 0) {
               invoke_compiler_on_method(task);
               nmethod* nm = method->code();
               if (nm != NULL) {
                 nm->make_zombie();
                 method->clear_code();
               }
               compile_count--;
             }
           }
 #endif /* COMPILER1 */
           invoke_compiler_on_method(task);
         } else {
           // After compilation is disabled, remove remaining methods from queue
           method->clear_queued_for_compilation();
         }
       }
     }
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::init_compiler_thread_log
 //
 // Set up state required by +LogCompilation.
 void CompileBroker::init_compiler_thread_log() {
     CompilerThread* thread = CompilerThread::current();
     char  fileBuf[4*K];
     FILE* fp = NULL;
     char* file = 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(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
                      thread_id, os::current_process_id());
       } else {
         jio_snprintf(fileBuf, sizeof(fileBuf),
                      "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
                      os::file_separator(), thread_id, os::current_process_id());
       }
       fp = fopen(fileBuf, "at");
       if (fp != NULL) {
         file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
         strcpy(file, fileBuf);
         break;
       }
     }
     if (fp == NULL) {
       warning("Cannot open log file: %s", fileBuf);
     } else {
       if (LogCompilation && Verbose)
         tty->print_cr("Opening compilation log %s", file);
       CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
       thread->init_log(log);
       if (xtty != NULL) {
         ttyLocker ttyl;
         // Record any per thread log files
         xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
       }
     }
 }
 // ------------------------------------------------------------------
 // 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", Thread::current());
 #endif
     ThreadInVMfromNative tivfn(JavaThread::current());
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::invoke_compiler_on_method
 //
 // Compile a method.
 //
 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
   if (PrintCompilation) {
     ResourceMark rm;
     task->print_line();
   }
   elapsedTimer time;
   CompilerThread* thread = CompilerThread::current();
   ResourceMark rm(thread);
   // 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;
   {
     // 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,
                         (methodOop)JNIHandles::resolve(task->method_handle()));
     should_break = check_break_at(method, compile_id, is_osr);
     if (should_log && !CompilerOracle::should_log(method)) {
       should_log = false;
     }
     assert(!method->is_native(), "no longer compile natives");
     // Save information about this method in case of failure.
     set_last_compile(thread, method, is_osr, task->comp_level());
     DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
   }
   // Allocate a new set of JNI handles.
   push_jni_handle_block();
   jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
   int compilable = ciEnv::MethodCompilable;
   {
     int system_dictionary_modification_counter;
     {
       MutexLocker locker(Compile_lock, thread);
       system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
     }
     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);
     compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
     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");
     }
     if (ci_env.failing()) {
       // Copy this bit to the enclosing block:
       compilable = ci_env.compilable();
       if (PrintCompilation) {
         const char* reason = ci_env.failure_reason();
         if (compilable == ciEnv::MethodCompilable_not_at_tier) {
           if (is_highest_tier_compile(ci_env.comp_level())) {
             // Already at highest tier, promote to not compilable.
             compilable = ciEnv::MethodCompilable_never;
           } else {
             tty->print_cr("%3d   COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason);
           }
         }
         if (compilable == ciEnv::MethodCompilable_never) {
           tty->print_cr("%3d   COMPILE SKIPPED: %s (not retryable)", compile_id, reason);
         } else if (compilable == ciEnv::MethodCompilable) {
           tty->print_cr("%3d   COMPILE SKIPPED: %s", compile_id, reason);
         }
       }
     } else {
       task->mark_success();
       task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
     }
   }
   pop_jni_handle_block();
   methodHandle method(thread,
                       (methodOop)JNIHandles::resolve(task->method_handle()));
   DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
   collect_statistics(thread, time, task);
   if (compilable == ciEnv::MethodCompilable_never) {
     if (is_osr) {
       method->set_not_osr_compilable();
     } else {
       method->set_not_compilable_quietly();
     }
   } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
     method->set_not_compilable_quietly(task->comp_level());
   }
   // 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 complie 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
 }
 // ------------------------------------------------------------------
 // CompileBroker::handle_full_code_cache
 //
 // The CodeCache is full.  Print out warning and disable compilation or
 // try code cache cleaning so compilation can continue later.
 void CompileBroker::handle_full_code_cache() {
   UseInterpreter = true;
   if (UseCompiler || AlwaysCompileLoopMethods ) {
     CompilerThread* thread = CompilerThread::current();
     CompileLog* log = thread->log();
     if (log != NULL) {
       log->begin_elem("code_cache_full");
       log->stamp();
       log->end_elem();
     }
     warning("CodeCache is full. Compiler has been disabled.");
     warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
 #ifndef PRODUCT
     if (CompileTheWorld || ExitOnFullCodeCache) {
       before_exit(JavaThread::current());
       exit_globals(); // will delete tty
       vm_direct_exit(CompileTheWorld ? 0 : 1);
     }
 #endif
     if (UseCodeCacheFlushing) {
       NMethodSweeper::handle_full_code_cache(true);
     } else {
       UseCompiler               = false;
       AlwaysCompileLoopMethods  = false;
     }
   }
 }
 // ------------------------------------------------------------------
 // CompileBroker::set_last_compile
 //
 // Record this compilation for debugging purposes.
 void CompileBroker::set_last_compile(CompilerThread* thread, 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);
   char current_method[CompilerCounters::cmname_buffer_length];
   size_t maxLen = CompilerCounters::cmname_buffer_length;
   if (UsePerfData) {
     const char* class_name = method->method_holder()->klass_part()->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::check_break_at
 //
 // Should the compilation break at the current compilation.
 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
   if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
     return true;
   } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
     return true;
   } else {
     return (compile_id == CIBreakAt);
   }
 }
 // ------------------------------------------------------------------
 // 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, (methodOop)JNIHandles::resolve(task->method_handle()));
   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
   //
   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();
     }
   } 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++;
   } else {
     // Compilation succeeded
     // update compilation ticks - used by the implementation of
     // java.lang.management.CompilationMBean
     _perf_total_compilation->inc(time.ticks());
     if (CITime) {
       _t_total_compilation.add(time);
       if (is_osr) {
         _t_osr_compilation.add(time);
         _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
       } else {
         _t_standard_compilation.add(time);
         _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
       }
     }
     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->code_size();
     _total_compile_count++;
     if (UsePerfData) {
       _perf_sum_nmethod_size->inc(code->total_size());
       _perf_sum_nmethod_code_size->inc(code->code_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("");
 }
 void CompileBroker::print_times() {
   tty->cr();
   tty->print_cr("Accumulated compiler times (for compiled methods only)");
   tty->print_cr("------------------------------------------------");
                //0000000000111111111122222222223333333333444444444455555555556666666666
                //0123456789012345678901234567890123456789012345678901234567890123456789
   tty->print_cr("  Total compilation time   : %6.3f s", CompileBroker::_t_total_compilation.seconds());
   tty->print_cr("    Standard compilation   : %6.3f s, Average : %2.3f",
                 CompileBroker::_t_standard_compilation.seconds(),
                 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
   tty->print_cr("    On stack replacement   : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count);
   if (compiler(CompLevel_fast_compile)) {
     compiler(CompLevel_fast_compile)->print_timers();
     if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier))
       compiler(CompLevel_highest_tier)->print_timers();
   }
   tty->cr();
   int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
   tty->print_cr("  Total compiled bytecodes : %6d bytes", tcb);
   tty->print_cr("    Standard compilation   : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
   tty->print_cr("    On stack replacement   : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
   int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
   tty->print_cr("  Average compilation speed: %6d bytes/s", bps);
   tty->cr();
   tty->print_cr("  nmethod code size        : %6d bytes", CompileBroker::_sum_nmethod_code_size);
   tty->print_cr("  nmethod total size       : %6d bytes", CompileBroker::_sum_nmethod_size);
 }
 // Debugging output for failure
 void CompileBroker::print_last_compile() {
   if ( _last_compile_level != CompLevel_none &&
        compiler(_last_compile_level) != NULL &&
        _last_method_compiled != 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);
     }
   }
 }
 void CompileBroker::print_compiler_threads_on(outputStream* st) {
 #ifndef PRODUCT
   st->print_cr("Compiler thread printing unimplemented.");
   st->cr();
 #endif
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/compiler/compileBroker.cpp@e9ff18c4ace7 (annotated)

src/share/vm/compiler/compileBroker.cpp