jdk8-mips64-public/hotspot: src/share/vm/jfr/leakprofiler/leakProfiler.cpp@b985cbb00e68 (annotated)

src/share/vm/jfr/leakprofiler/leakProfiler.cpp@b985cbb00e68 (annotated)

src/share/vm/jfr/leakprofiler/leakProfiler.cpp

Mon, 12 Aug 2019 18:30:40 +0300

author: apetushkov
date: Mon, 12 Aug 2019 18:30:40 +0300
changeset 9858: b985cbb00e68
child 9885: 8e875c964f41
permissions: -rw-r--r--

8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

 /*
  * Copyright (c) 2014, 2018, 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 "jfr/leakprofiler/emitEventOperation.hpp"
 #include "jfr/leakprofiler/leakProfiler.hpp"
 #include "jfr/leakprofiler/startOperation.hpp"
 #include "jfr/leakprofiler/stopOperation.hpp"
 #include "jfr/leakprofiler/sampling/objectSampler.hpp"
 #include "jfr/recorder/service/jfrOptionSet.hpp"
 #include "memory/iterator.hpp"
 #include "oops/oop.hpp"
 #include "runtime/atomic.hpp"
 #include "runtime/orderAccess.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/vmThread.hpp"
 #include "utilities/ostream.hpp"
 // Only to be updated during safepoint
 ObjectSampler* LeakProfiler::_object_sampler = NULL;
 static volatile jbyte suspended = 0;
 bool LeakProfiler::start(jint sample_count) {
   if (_object_sampler != NULL) {
     // already started
     return true;
   }
   // Allows user to disable leak profiler on command line by setting queue size to zero.
   if (sample_count > 0) {
     StartOperation op(sample_count);
     VMThread::execute(&op);
     return _object_sampler != NULL;
   }
   return false;
 }
 bool LeakProfiler::stop() {
   if (_object_sampler == NULL) {
     // already stopped/not started
     return true;
   }
   StopOperation op;
   VMThread::execute(&op);
   return _object_sampler == NULL;
 }
 void LeakProfiler::emit_events(jlong cutoff_ticks, bool emit_all) {
   if (!is_running()) {
     return;
   }
   EmitEventOperation op(cutoff_ticks, emit_all);
   VMThread::execute(&op);
 }
 void LeakProfiler::oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
   assert(SafepointSynchronize::is_at_safepoint(),
     "Leak Profiler::oops_do(...) may only be called during safepoint");
   if (_object_sampler != NULL) {
     _object_sampler->oops_do(is_alive, f);
   }
 }
 void LeakProfiler::sample(HeapWord* object,
                           size_t size,
                           JavaThread* thread) {
   assert(is_running(), "invariant");
   assert(thread != NULL, "invariant");
   assert(thread->thread_state() == _thread_in_vm, "invariant");
   // exclude compiler threads and code sweeper thread
   if (thread->is_hidden_from_external_view()) {
     return;
   }
   _object_sampler->add(object, size, thread);
 }
 ObjectSampler* LeakProfiler::object_sampler() {
   assert(is_suspended() || SafepointSynchronize::is_at_safepoint(),
     "Leak Profiler::object_sampler() may only be called during safepoint");
   return _object_sampler;
 }
 void LeakProfiler::set_object_sampler(ObjectSampler* object_sampler) {
   assert(SafepointSynchronize::is_at_safepoint(),
     "Leak Profiler::set_object_sampler() may only be called during safepoint");
   _object_sampler = object_sampler;
 }
 bool LeakProfiler::is_running() {
   return _object_sampler != NULL && !suspended;
 }
 bool LeakProfiler::is_suspended() {
   return _object_sampler != NULL && suspended;
 }
 void LeakProfiler::resume() {
   assert(is_suspended(), "invariant");
   OrderAccess::storestore();
   Atomic::store((jbyte)0, &suspended);
   assert(is_running(), "invariant");
 }
 void LeakProfiler::suspend() {
   assert(SafepointSynchronize::is_at_safepoint(), "invariant");
   assert(_object_sampler != NULL, "invariant");
   assert(!is_suspended(), "invariant");
   suspended = (jbyte)1; // safepoint visible
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/leakprofiler/leakProfiler.cpp@b985cbb00e68 (annotated)

src/share/vm/jfr/leakprofiler/leakProfiler.cpp