jdk8-mips64-public/hotspot: comparison src/share/vm/jfr/leakprofiler/checkpoint/objectSampleCheckpoint.cpp

-:c7a3e57fdf4a
+:b985cbb00e68
+/*
+* 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/jfrEvents.hpp"
+#include "jfr/recorder/jfrRecorder.hpp"
+#include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp"
+#include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"
+#include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
+#include "jfr/leakprofiler/chains/edgeStore.hpp"
+#include "jfr/leakprofiler/chains/objectSampleMarker.hpp"
+#include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp"
+#include "jfr/leakprofiler/checkpoint/objectSampleWriter.hpp"
+#include "jfr/leakprofiler/leakProfiler.hpp"
+#include "jfr/leakprofiler/sampling/objectSample.hpp"
+#include "jfr/leakprofiler/sampling/objectSampler.hpp"
+#include "jfr/leakprofiler/utilities/rootType.hpp"
+#include "jfr/metadata/jfrSerializer.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/thread.inline.hpp"
+template <typename SampleProcessor>
+static void do_samples(ObjectSample* sample, const ObjectSample* const end, SampleProcessor& processor) {
+assert(sample != NULL, "invariant");
+while (sample != end) {
+processor.sample_do(sample);
+sample = sample->next();
+}
+}
+class RootSystemType : public JfrSerializer {
+public:
+void serialize(JfrCheckpointWriter& writer) {
+const u4 nof_root_systems = OldObjectRoot::_number_of_systems;
+writer.write_count(nof_root_systems);
+for (u4 i = 0; i < nof_root_systems; ++i) {
+writer.write_key(i);
+writer.write(OldObjectRoot::system_description((OldObjectRoot::System)i));
+}
+}
+};
+class RootType : public JfrSerializer {
+public:
+void serialize(JfrCheckpointWriter& writer) {
+const u4 nof_root_types = OldObjectRoot::_number_of_types;
+writer.write_count(nof_root_types);
+for (u4 i = 0; i < nof_root_types; ++i) {
+writer.write_key(i);
+writer.write(OldObjectRoot::type_description((OldObjectRoot::Type)i));
+}
+}
+};
+class CheckpointInstall {
+private:
+const JfrCheckpointBlobHandle& _cp;
+public:
+CheckpointInstall(const JfrCheckpointBlobHandle& cp) : _cp(cp) {}
+void sample_do(ObjectSample* sample) {
+assert(sample != NULL, "invariant");
+if (!sample->is_dead()) {
+sample->set_klass_checkpoint(_cp);
+}
+}
+};
+class CheckpointWrite {
+private:
+JfrCheckpointWriter& _writer;
+const jlong _last_sweep;
+public:
+CheckpointWrite(JfrCheckpointWriter& writer, jlong last_sweep) : _writer(writer), _last_sweep(last_sweep) {}
+void sample_do(ObjectSample* sample) {
+assert(sample != NULL, "invariant");
+if (sample->is_alive_and_older_than(_last_sweep)) {
+if (sample->has_thread_checkpoint()) {
+const JfrCheckpointBlobHandle& thread_cp = sample->thread_checkpoint();
+thread_cp->exclusive_write(_writer);
+}
+if (sample->has_klass_checkpoint()) {
+const JfrCheckpointBlobHandle& klass_cp = sample->klass_checkpoint();
+klass_cp->exclusive_write(_writer);
+}
+}
+}
+};
+class CheckpointStateReset {
+private:
+const jlong _last_sweep;
+public:
+CheckpointStateReset(jlong last_sweep) : _last_sweep(last_sweep) {}
+void sample_do(ObjectSample* sample) {
+assert(sample != NULL, "invariant");
+if (sample->is_alive_and_older_than(_last_sweep)) {
+if (sample->has_thread_checkpoint()) {
+const JfrCheckpointBlobHandle& thread_cp = sample->thread_checkpoint();
+thread_cp->reset_write_state();
+}
+if (sample->has_klass_checkpoint()) {
+const JfrCheckpointBlobHandle& klass_cp = sample->klass_checkpoint();
+klass_cp->reset_write_state();
+}
+}
+}
+};
+class StackTraceWrite {
+private:
+JfrStackTraceRepository& _stack_trace_repo;
+JfrCheckpointWriter& _writer;
+int _count;
+public:
+StackTraceWrite(JfrStackTraceRepository& stack_trace_repo, JfrCheckpointWriter& writer) :
+_stack_trace_repo(stack_trace_repo), _writer(writer), _count(0) {
+JfrStacktrace_lock->lock();
+}
+~StackTraceWrite() {
+assert(JfrStacktrace_lock->owned_by_self(), "invariant");
+JfrStacktrace_lock->unlock();
+}
+void sample_do(ObjectSample* sample) {
+assert(sample != NULL, "invariant");
+if (!sample->is_dead()) {
+if (sample->has_stack_trace()) {
+JfrTraceId::use(sample->klass(), true);
+_stack_trace_repo.write(_writer, sample->stack_trace_id(), sample->stack_trace_hash());
+++_count;
+}
+}
+}
+int count() const {
+return _count;
+}
+};
+class SampleMark {
+private:
+ObjectSampleMarker& _marker;
+jlong _last_sweep;
+int _count;
+public:
+SampleMark(ObjectSampleMarker& marker, jlong last_sweep) : _marker(marker),
+_last_sweep(last_sweep),
+_count(0) {}
+void sample_do(ObjectSample* sample) {
+assert(sample != NULL, "invariant");
+if (sample->is_alive_and_older_than(_last_sweep)) {
+_marker.mark(sample->object());
+++_count;
+}
+}
+int count() const {
+return _count;
+}
+};
+void ObjectSampleCheckpoint::install(JfrCheckpointWriter& writer, bool class_unload, bool resume) {
+assert(class_unload ? SafepointSynchronize::is_at_safepoint() : LeakProfiler::is_suspended(), "invariant");
+if (!writer.has_data()) {
+if (!class_unload) {
+LeakProfiler::resume();
+}
+assert(LeakProfiler::is_running(), "invariant");
+return;
+}
+assert(writer.has_data(), "invariant");
+const JfrCheckpointBlobHandle h_cp = writer.checkpoint_blob();
+const ObjectSampler* const object_sampler = LeakProfiler::object_sampler();
+assert(object_sampler != NULL, "invariant");
+ObjectSample* const last = const_cast<ObjectSample*>(object_sampler->last());
+const ObjectSample* const last_resolved = object_sampler->last_resolved();
+CheckpointInstall install(h_cp);
+if (class_unload) {
+if (last != NULL) {
+// all samples need the class unload information
+do_samples(last, NULL, install);
+}
+assert(LeakProfiler::is_running(), "invariant");
+return;
+}
+// only new samples since last resolved checkpoint
+if (last != last_resolved) {
+do_samples(last, last_resolved, install);
+if (resume) {
+const_cast<ObjectSampler*>(object_sampler)->set_last_resolved(last);
+}
+}
+assert(LeakProfiler::is_suspended(), "invariant");
+if (resume) {
+LeakProfiler::resume();
+assert(LeakProfiler::is_running(), "invariant");
+}
+}
+void ObjectSampleCheckpoint::write(const EdgeStore* edge_store, bool emit_all, Thread* thread) {
+assert(edge_store != NULL, "invariant");
+assert(thread != NULL, "invariant");
+static bool types_registered = false;
+if (!types_registered) {
+JfrSerializer::register_serializer(TYPE_OLDOBJECTROOTSYSTEM, false, true, new RootSystemType());
+JfrSerializer::register_serializer(TYPE_OLDOBJECTROOTTYPE, false, true, new RootType());
+types_registered = true;
+}
+const ObjectSampler* const object_sampler = LeakProfiler::object_sampler();
+assert(object_sampler != NULL, "invariant");
+const jlong last_sweep = emit_all ? max_jlong : object_sampler->last_sweep().value();
+ObjectSample* const last = const_cast<ObjectSample*>(object_sampler->last());
+{
+JfrCheckpointWriter writer(false, false, thread);
+CheckpointWrite checkpoint_write(writer, last_sweep);
+do_samples(last, NULL, checkpoint_write);
+}
+CheckpointStateReset state_reset(last_sweep);
+do_samples(last, NULL, state_reset);
+if (!edge_store->is_empty()) {
+// java object and chain representations
+JfrCheckpointWriter writer(false, true, thread);
+ObjectSampleWriter osw(writer, edge_store);
+edge_store->iterate_edges(osw);
+}
+}
+WriteObjectSampleStacktrace::WriteObjectSampleStacktrace(JfrStackTraceRepository& repo) :
+_stack_trace_repo(repo) {
+}
+bool WriteObjectSampleStacktrace::process() {
+assert(SafepointSynchronize::is_at_safepoint(), "invariant");
+if (!LeakProfiler::is_running()) {
+return true;
+}
+// Suspend the LeakProfiler subsystem
+// to ensure stable samples even
+// after we return from the safepoint.
+LeakProfiler::suspend();
+assert(!LeakProfiler::is_running(), "invariant");
+assert(LeakProfiler::is_suspended(), "invariant");
+const ObjectSampler* object_sampler = LeakProfiler::object_sampler();
+assert(object_sampler != NULL, "invariant");
+assert(LeakProfiler::is_suspended(), "invariant");
+ObjectSample* const last = const_cast<ObjectSample*>(object_sampler->last());
+const ObjectSample* const last_resolved = object_sampler->last_resolved();
+if (last == last_resolved) {
+assert(LeakProfiler::is_suspended(), "invariant");
+return true;
+}
+JfrCheckpointWriter writer(false, true, Thread::current());
+const JfrCheckpointContext ctx = writer.context();
+writer.write_type(TYPE_STACKTRACE);
+const jlong count_offset = writer.reserve(sizeof(u4));
+int count = 0;
+{
+StackTraceWrite stack_trace_write(_stack_trace_repo, writer); // JfrStacktrace_lock
+do_samples(last, last_resolved, stack_trace_write);
+count = stack_trace_write.count();
+}
+if (count == 0) {
+writer.set_context(ctx);
+assert(LeakProfiler::is_suspended(), "invariant");
+return true;
+}
+assert(count > 0, "invariant");
+writer.write_count((u4)count, count_offset);
+JfrStackTraceRepository::write_metadata(writer);
+ObjectSampleCheckpoint::install(writer, false, false);
+assert(LeakProfiler::is_suspended(), "invariant");
+return true;
+}
+int ObjectSampleCheckpoint::mark(ObjectSampleMarker& marker, bool emit_all) {
+const ObjectSampler* object_sampler = LeakProfiler::object_sampler();
+assert(object_sampler != NULL, "invariant");
+ObjectSample* const last = const_cast<ObjectSample*>(object_sampler->last());
+if (last == NULL) {
+return 0;
+}
+const jlong last_sweep = emit_all ? max_jlong : object_sampler->last_sweep().value();
+SampleMark mark(marker, last_sweep);
+do_samples(last, NULL, mark);
+return mark.count();
+}

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/jfr/leakprofiler/checkpoint/objectSampleCheckpoint.cpp

src/share/vm/jfr/leakprofiler/checkpoint/objectSampleCheckpoint.cpp