85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
/*
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* Copyright (c) 2005, 2012, 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_SERVICES_HEAPDUMPER_HPP
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#define SHARE_VM_SERVICES_HEAPDUMPER_HPP
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#include "memory/allocation.hpp"
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#include "oops/oop.hpp"
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#include "runtime/os.hpp"
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// HeapDumper is used to dump the java heap to file in HPROF binary format:
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//
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// { HeapDumper dumper(true /* full GC before heap dump */);
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// if (dumper.dump("/export/java.hprof")) {
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// ResourceMark rm;
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// tty->print_cr("Dump failed: %s", dumper.error_as_C_string());
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// } else {
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// // dump succeeded
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// }
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// }
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//
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class HeapDumper : public StackObj {
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private:
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char* _error;
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bool _print_to_tty;
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bool _gc_before_heap_dump;
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bool _oome;
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elapsedTimer _t;
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HeapDumper(bool gc_before_heap_dump, bool print_to_tty, bool oome) :
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_gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(print_to_tty), _oome(oome) { }
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// string representation of error
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char* error() const { return _error; }
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void set_error(char* error);
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// indicates if progress messages can be sent to tty
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bool print_to_tty() const { return _print_to_tty; }
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// internal timer.
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elapsedTimer* timer() { return &_t; }
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static void dump_heap(bool oome);
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public:
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HeapDumper(bool gc_before_heap_dump) :
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_gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false), _oome(false) { }
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~HeapDumper();
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// dumps the heap to the specified file, returns 0 if success.
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int dump(const char* path);
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// returns error message (resource allocated), or NULL if no error
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char* error_as_C_string() const;
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static void dump_heap() NOT_SERVICES_RETURN;
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static void dump_heap_from_oome() NOT_SERVICES_RETURN;
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};
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#endif // SHARE_VM_SERVICES_HEAPDUMPER_HPP
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