jdk-sandbox: src/hotspot/share/jfr/leakprofiler/leakProfiler.cpp@49102ba8cf14 (annotated)

50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	1	/*
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	2	* Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	4	*
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	7	* published by the Free Software Foundation.
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	8	*
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	13	* accompanied this code).
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	14	*
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	18	*
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	20	* or visit www.oracle.com if you need additional information or have any
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	21	* questions.
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	22	*
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	23	*/
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	24
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	25	#include "precompiled.hpp"
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	26	#include "jfr/leakprofiler/leakProfiler.hpp"
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	27	#include "jfr/leakprofiler/startOperation.hpp"
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	28	#include "jfr/leakprofiler/stopOperation.hpp"
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	29	#include "jfr/leakprofiler/checkpoint/eventEmitter.hpp"
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	30	#include "jfr/leakprofiler/sampling/objectSampler.hpp"
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	31	#include "jfr/recorder/service/jfrOptionSet.hpp"
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	32	#include "logging/log.hpp"
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	33	#include "memory/iterator.hpp"
50122 d2bcbcf0d3d9 8203278: AArch64/PPC64 build failures after JDK-8199712 (Flight Recorder) shade parents: 50113 diff changeset	34	#include "runtime/thread.inline.hpp"
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	35	#include "runtime/vmThread.hpp"
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	36
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	37	bool LeakProfiler::is_running() {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	38	return ObjectSampler::is_created();
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	39	}
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	40
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	41	bool LeakProfiler::start(int sample_count) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	42	if (is_running()) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	43	return true;
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	44	}
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	45
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	46	// Allows user to disable leak profiler on command line by setting queue size to zero.
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	47	if (sample_count == 0) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	48	return false;
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	49	}
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	50
50673 e7da80712449 8205338: ZGC: LeakProfiler not yet supported pliden parents: 50429 diff changeset	51	if (UseZGC) {
e7da80712449 8205338: ZGC: LeakProfiler not yet supported pliden parents: 50429 diff changeset	52	log_warning(jfr)("LeakProfiler is currently not supported in combination with ZGC");
e7da80712449 8205338: ZGC: LeakProfiler not yet supported pliden parents: 50429 diff changeset	53	return false;
e7da80712449 8205338: ZGC: LeakProfiler not yet supported pliden parents: 50429 diff changeset	54	}
e7da80712449 8205338: ZGC: LeakProfiler not yet supported pliden parents: 50429 diff changeset	55
52925 9c18c9d839d3 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) rkennke parents: 50673 diff changeset	56	if (UseShenandoahGC) {
9c18c9d839d3 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) rkennke parents: 50673 diff changeset	57	log_warning(jfr)("LeakProfiler is currently not supported in combination with Shenandoah GC");
9c18c9d839d3 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) rkennke parents: 50673 diff changeset	58	return false;
9c18c9d839d3 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) rkennke parents: 50673 diff changeset	59	}
9c18c9d839d3 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) rkennke parents: 50673 diff changeset	60
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	61	assert(!is_running(), "invariant");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	62	assert(sample_count > 0, "invariant");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	63
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	64	// schedule the safepoint operation for installing the object sampler
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	65	StartOperation op(sample_count);
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	66	VMThread::execute(&op);
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	67
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	68	if (!is_running()) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	69	log_trace(jfr, system)("Object sampling could not be started because the sampler could not be allocated");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	70	return false;
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	71	}
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	72	assert(is_running(), "invariant");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	73	log_trace(jfr, system)("Object sampling started");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	74	return true;
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	75	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	76
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	77	bool LeakProfiler::stop() {
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	78	if (!is_running()) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	79	return false;
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	80	}
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	81
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	82	// schedule the safepoint operation for uninstalling and destroying the object sampler
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	83	StopOperation op;
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	84	VMThread::execute(&op);
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	85
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	86	assert(!is_running(), "invariant");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	87	log_trace(jfr, system)("Object sampling stopped");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	88	return true;
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	89	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	90
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	91	void LeakProfiler::emit_events(int64_t cutoff_ticks, bool emit_all) {
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	92	if (!is_running()) {
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	93	return;
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	94	}
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	95	// exclusive access to object sampler instance
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	96	ObjectSampler* const sampler = ObjectSampler::acquire();
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	97	assert(sampler != NULL, "invariant");
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	98	EventEmitter::emit(sampler, cutoff_ticks, emit_all);
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	99	ObjectSampler::release();
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	100	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	101
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	102	void LeakProfiler::oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	103	assert(SafepointSynchronize::is_at_safepoint(),
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	104	"Leak Profiler::oops_do(...) may only be called during safepoint");
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	105	if (is_running()) {
49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	106	ObjectSampler::oops_do(is_alive, f);
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	107	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	108	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	109
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	110	void LeakProfiler::sample(HeapWord* object, size_t size, JavaThread* thread) {
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	111	assert(is_running(), "invariant");
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	112	assert(thread != NULL, "invariant");
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	113	assert(thread->thread_state() == _thread_in_vm, "invariant");
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	114
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	115	// exclude compiler threads and code sweeper thread
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	116	if (thread->is_hidden_from_external_view()) {
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	117	return;
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	118	}
caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	119
55571 49102ba8cf14 8214542: JFR: Old Object Sample event slow on a deep heap in debug builds mgronlun parents: 52925 diff changeset	120	ObjectSampler::sample(object, size, thread);
50113 caf115bb98ad 8199712: Flight Recorder egahlin parents: diff changeset	121	}

author	mgronlun
	Wed, 03 Jul 2019 11:34:46 +0200
changeset 55571	49102ba8cf14
parent 52925	9c18c9d839d3
child 58823	6a21dba79b81
permissions	-rw-r--r--