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src/share/vm/services/heapDumper.hpp@30f67acf635d (annotated)

src/share/vm/services/heapDumper.hpp

Sat, 11 Sep 2010 08:18:31 +0200

author

thurka

date

Sat, 11 Sep 2010 08:18:31 +0200

changeset 2130

30f67acf635d

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6765718: Indicate which thread throwing OOME when generating the heap dump at OOME
Summary: Emit a fake frame that makes it look like the thread is in the OutOfMemoryError zero-parameter constructor
Reviewed-by: dcubed

duke@435	1	/*
thurka@2130	2	* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// HeapDumper is used to dump the java heap to file in HPROF binary format:
duke@435	26	//
duke@435	27	// { HeapDumper dumper(true /* full GC before heap dump */);
duke@435	28	// if (dumper.dump("/export/java.hprof")) {
duke@435	29	// ResourceMark rm;
duke@435	30	// tty->print_cr("Dump failed: %s", dumper.error_as_C_string());
duke@435	31	// } else {
duke@435	32	// // dump succeeded
duke@435	33	// }
duke@435	34	// }
duke@435	35	//
duke@435	36
duke@435	37	class HeapDumper : public StackObj {
duke@435	38	private:
duke@435	39	char* _error;
duke@435	40	bool _print_to_tty;
duke@435	41	bool _gc_before_heap_dump;
thurka@2130	42	bool _oome;
duke@435	43	elapsedTimer _t;
duke@435	44
thurka@2130	45	HeapDumper(bool gc_before_heap_dump, bool print_to_tty, bool oome) :
thurka@2130	46	_gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(print_to_tty), _oome(oome) { }
thurka@2130	47
duke@435	48	// string representation of error
duke@435	49	char* error() const { return _error; }
duke@435	50	void set_error(char* error);
duke@435	51
duke@435	52	// indicates if progress messages can be sent to tty
duke@435	53	bool print_to_tty() const { return _print_to_tty; }
duke@435	54
duke@435	55	// internal timer.
duke@435	56	elapsedTimer* timer() { return &_t; }
duke@435	57
thurka@2130	58	static void dump_heap(bool oome);
thurka@2130	59
duke@435	60	public:
duke@435	61	HeapDumper(bool gc_before_heap_dump) :
thurka@2130	62	_gc_before_heap_dump(gc_before_heap_dump), _error(NULL), _print_to_tty(false), _oome(false) { }
duke@435	63
duke@435	64	~HeapDumper();
duke@435	65
duke@435	66	// dumps the heap to the specified file, returns 0 if success.
duke@435	67	int dump(const char* path);
duke@435	68
duke@435	69	// returns error message (resource allocated), or NULL if no error
duke@435	70	char* error_as_C_string() const;
duke@435	71
duke@435	72	static void dump_heap() KERNEL_RETURN;
thurka@2130	73
thurka@2130	74	static void dump_heap_from_oome() KERNEL_RETURN;
duke@435	75	};