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/*
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* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_JFR_RECORDER_STACKTRACE_JFRSTACKTRACEREPOSITORY_HPP
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#define SHARE_VM_JFR_RECORDER_STACKTRACE_JFRSTACKTRACEREPOSITORY_HPP
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#include "jfr/utilities/jfrAllocation.hpp"
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#include "jfr/utilities/jfrTypes.hpp"
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class frame;
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class JavaThread;
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class JfrCheckpointSystem;
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class JfrCheckpointWriter;
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class JfrChunkWriter;
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class Method;
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class JfrStackFrame {
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private:
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const Method* _method;
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traceid _methodid;
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int _line;
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int _bci;
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u1 _type;
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public:
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enum {
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FRAME_INTERPRETER = 0,
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FRAME_JIT,
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FRAME_INLINE,
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FRAME_NATIVE,
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NUM_FRAME_TYPES
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};
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JfrStackFrame(const traceid& id, int bci, int type, const Method* method) :
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_method(method), _methodid(id), _line(0), _bci(bci), _type(type) {}
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JfrStackFrame(const traceid& id, int bci, int type, int lineno) :
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_method(NULL), _methodid(id), _line(0), _bci(bci), _type(type) {}
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bool equals(const JfrStackFrame& rhs) const;
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void write(JfrChunkWriter& cw) const;
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void write(JfrCheckpointWriter& cpw) const;
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void resolve_lineno();
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};
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class JfrStackTrace : public StackObj {
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friend class JfrStackTraceRepository;
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private:
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JfrStackFrame* _frames;
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traceid _id;
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u4 _nr_of_frames;
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unsigned int _hash;
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const u4 _max_frames;
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bool _reached_root;
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bool _lineno;
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public:
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JfrStackTrace(JfrStackFrame* frames, u4 max_frames) : _frames(frames),
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_id(0),
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_nr_of_frames(0),
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_hash(0),
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_reached_root(false),
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_max_frames(max_frames),
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_lineno(false) {}
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bool record_thread(JavaThread& thread, frame& frame);
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bool record_safe(JavaThread* thread, int skip, bool leakp = false);
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void resolve_linenos();
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void set_nr_of_frames(u4 nr_of_frames) { _nr_of_frames = nr_of_frames; }
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void set_hash(unsigned int hash) { _hash = hash; }
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void set_frame(u4 frame_pos, JfrStackFrame& frame);
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void set_reached_root(bool reached_root) { _reached_root = reached_root; }
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bool full_stacktrace() const { return _reached_root; }
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bool have_lineno() const { return _lineno; }
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};
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class JfrStackTraceRepository : public JfrCHeapObj {
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friend class JfrRecorder;
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friend class JfrRecorderService;
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friend class ObjectSampler;
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friend class WriteObjectSampleStacktrace;
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class StackTrace : public JfrCHeapObj {
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friend class JfrStackTrace;
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friend class JfrStackTraceRepository;
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private:
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StackTrace* _next;
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JfrStackFrame* _frames;
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const traceid _id;
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u4 _nr_of_frames;
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unsigned int _hash;
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bool _reached_root;
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mutable bool _written;
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unsigned int hash() const { return _hash; }
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bool should_write() const { return !_written; }
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public:
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StackTrace(traceid id, const JfrStackTrace& trace, StackTrace* next);
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~StackTrace();
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traceid id() const { return _id; }
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StackTrace* next() const { return _next; }
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void write(JfrChunkWriter& cw) const;
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void write(JfrCheckpointWriter& cpw) const;
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bool equals(const JfrStackTrace& rhs) const;
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};
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private:
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static const u4 TABLE_SIZE = 2053;
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StackTrace* _table[TABLE_SIZE];
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traceid _next_id;
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u4 _entries;
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size_t write_impl(JfrChunkWriter& cw, bool clear);
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traceid record_for(JavaThread* thread, int skip, JfrStackFrame* frames, u4 max_frames);
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traceid record_for(JavaThread* thread, int skip, JfrStackFrame* frames, u4 max_frames, unsigned int* hash);
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traceid add_trace(const JfrStackTrace& stacktrace);
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const StackTrace* resolve_entry(unsigned int hash, traceid id) const;
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static void write_metadata(JfrCheckpointWriter& cpw);
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JfrStackTraceRepository();
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static JfrStackTraceRepository& instance();
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public:
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static JfrStackTraceRepository* create();
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bool initialize();
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static void destroy();
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static traceid add(const JfrStackTrace& stacktrace);
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static traceid record(Thread* thread, int skip = 0);
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static traceid record(Thread* thread, int skip, unsigned int* hash);
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traceid write(JfrCheckpointWriter& cpw, traceid id, unsigned int hash);
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size_t write(JfrChunkWriter& cw, bool clear);
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size_t clear();
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};
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#endif // SHARE_VM_JFR_RECORDER_STACKTRACE_JFRSTACKTRACEREPOSITORY_HPP
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