C++ (Cpp) lost_race示例

示例#1

文件： vmCMSOperations.cpp 项目： arbeitspferde/openjdk9-hotspot

//////////////////////////////////////////////////////////
// Methods in class VM_CMS_Final_Remark_Operation
//////////////////////////////////////////////////////////
void VM_CMS_Final_Remark::doit() {
  if (lost_race()) {
    // Nothing to do.
    return;
  }
#ifndef USDT2
  HS_DTRACE_PROBE(hs_private, cms__remark__begin);
#else /* USDT2 */
  HS_PRIVATE_CMS_REMARK_BEGIN();
#endif /* USDT2 */

  _collector->_gc_timer_cm->register_gc_pause_start("Final Mark");

  GenCollectedHeap* gch = GenCollectedHeap::heap();
  GCCauseSetter gccs(gch, GCCause::_cms_final_remark);

  VM_CMS_Operation::verify_before_gc();

  IsGCActiveMark x; // stop-world GC active
  _collector->do_CMS_operation(CMSCollector::CMS_op_checkpointRootsFinal, gch->gc_cause());

  VM_CMS_Operation::verify_after_gc();

  _collector->save_heap_summary();
  _collector->_gc_timer_cm->register_gc_pause_end();

#ifndef USDT2
  HS_DTRACE_PROBE(hs_private, cms__remark__end);
#else /* USDT2 */
  HS_PRIVATE_CMS_REMARK_END();
#endif /* USDT2 */
}

示例#2

文件： vmCMSOperations.cpp 项目： netroby/jdk9-dev

//////////////////////////////////////////////////////////
// Methods in class VM_CMS_Final_Remark_Operation
//////////////////////////////////////////////////////////
void VM_CMS_Final_Remark::doit() {
  if (lost_race()) {
    // Nothing to do.
    return;
  }
  HS_PRIVATE_CMS_REMARK_BEGIN();
  GCIdMark gc_id_mark(_gc_id);

  _collector->_gc_timer_cm->register_gc_pause_start("Final Mark");

  GenCollectedHeap* gch = GenCollectedHeap::heap();
  GCCauseSetter gccs(gch, GCCause::_cms_final_remark);

  VM_CMS_Operation::verify_before_gc();

  IsGCActiveMark x; // stop-world GC active
  _collector->do_CMS_operation(CMSCollector::CMS_op_checkpointRootsFinal, gch->gc_cause());

  VM_CMS_Operation::verify_after_gc();

  _collector->save_heap_summary();
  _collector->_gc_timer_cm->register_gc_pause_end();

  HS_PRIVATE_CMS_REMARK_END();
}

示例#3

文件： vmCMSOperations.cpp 项目： netroby/jdk9-dev

bool VM_CMS_Operation::doit_prologue() {
  assert(Thread::current()->is_ConcurrentGC_thread(), "just checking");
  assert(!CMSCollector::foregroundGCShouldWait(), "Possible deadlock");
  assert(!ConcurrentMarkSweepThread::cms_thread_has_cms_token(),
         "Possible deadlock");

  Heap_lock->lock();
  if (lost_race()) {
    assert(_prologue_succeeded == false, "Initialized in c'tor");
    Heap_lock->unlock();
  } else {
    _prologue_succeeded = true;
  }
  return _prologue_succeeded;
}

示例#4

//////////////////////////////////////////////////////////
// Methods in class VM_CMS_Final_Remark_Operation
//////////////////////////////////////////////////////////
void VM_CMS_Final_Remark::doit() {
  if (lost_race()) {
    // Nothing to do.
    return;
  }
  HS_DTRACE_PROBE(hs_private, cms__remark__begin);

  GenCollectedHeap* gch = GenCollectedHeap::heap();
  GCCauseSetter gccs(gch, GCCause::_cms_final_remark);

  VM_CMS_Operation::verify_before_gc();

  IsGCActiveMark x; // stop-world GC active
  _collector->do_CMS_operation(CMSCollector::CMS_op_checkpointRootsFinal);

  VM_CMS_Operation::verify_after_gc();
  HS_DTRACE_PROBE(hs_private, cms__remark__end);
}

示例#5

文件： vmCMSOperations.cpp 项目： arbeitspferde/openjdk9-hotspot

bool VM_CMS_Operation::doit_prologue() {
  assert(Thread::current()->is_ConcurrentGC_thread(), "just checking");
  assert(!CMSCollector::foregroundGCShouldWait(), "Possible deadlock");
  assert(!ConcurrentMarkSweepThread::cms_thread_has_cms_token(),
         "Possible deadlock");

  if (needs_pll()) {
    acquire_pending_list_lock();
  }
  // Get the Heap_lock after the pending_list_lock.
  Heap_lock->lock();
  if (lost_race()) {
    assert(_prologue_succeeded == false, "Initialized in c'tor");
    Heap_lock->unlock();
    if (needs_pll()) {
      release_and_notify_pending_list_lock();
    }
  } else {
    _prologue_succeeded = true;
  }
  return _prologue_succeeded;
}