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src/share/vm/utilities/defaultStream.hpp@b84fd7d73702 (annotated)

src/share/vm/utilities/defaultStream.hpp

Tue, 09 Apr 2013 09:54:17 -0700

author

iignatyev

date

Tue, 09 Apr 2013 09:54:17 -0700

changeset 4908

b84fd7d73702

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

child 7448

a4fdab16b621

permissions

-rw-r--r--

8007288: Additional WB API for compiler's testing
Reviewed-by: kvn, vlivanov

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2003, 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
stefank@2314	25	#ifndef SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP
stefank@2314	26	#define SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP
stefank@2314	27
stefank@2314	28	#include "utilities/xmlstream.hpp"
stefank@2314	29
duke@435	30	class defaultStream : public xmlTextStream {
duke@435	31	friend void ostream_abort();
duke@435	32	public:
duke@435	33	enum { NO_WRITER = -1 };
duke@435	34	private:
duke@435	35	bool _inited;
duke@435	36	fileStream* _log_file; // XML-formatted file shared by all threads
duke@435	37	static int _output_fd;
duke@435	38	static int _error_fd;
duke@435	39	static FILE* _output_stream;
duke@435	40	static FILE* _error_stream;
duke@435	41
duke@435	42	void init();
duke@435	43	void init_log();
duke@435	44	void finish_log();
duke@435	45	void finish_log_on_error(char *buf, int buflen);
duke@435	46	public:
duke@435	47	// must defer time stamp due to the fact that os::init() hasn't
duke@435	48	// yet been called and os::elapsed_counter() may not be valid
duke@435	49	defaultStream() {
duke@435	50	_log_file = NULL;
duke@435	51	_inited = false;
duke@435	52	_writer = -1;
duke@435	53	_last_writer = -1;
duke@435	54	}
duke@435	55
duke@435	56	~defaultStream() {
duke@435	57	if (has_log_file()) finish_log();
duke@435	58	}
duke@435	59
duke@435	60	static inline FILE* output_stream() {
duke@435	61	return DisplayVMOutputToStderr ? _error_stream : _output_stream;
duke@435	62	}
duke@435	63	static inline FILE* error_stream() {
duke@435	64	return DisplayVMOutputToStdout ? _output_stream : _error_stream;
duke@435	65	}
duke@435	66	static inline int output_fd() {
duke@435	67	return DisplayVMOutputToStderr ? _error_fd : _output_fd;
duke@435	68	}
duke@435	69	static inline int error_fd() {
duke@435	70	return DisplayVMOutputToStdout ? _output_fd : _error_fd;
duke@435	71	}
duke@435	72
duke@435	73	virtual void write(const char* s, size_t len);
duke@435	74
duke@435	75	void flush() {
duke@435	76	// once we can determine whether we are in a signal handler, we
duke@435	77	// should add the following assert here:
duke@435	78	// assert(xxxxxx, "can not flush buffer inside signal handler");
duke@435	79	xmlTextStream::flush();
duke@435	80	fflush(output_stream());
duke@435	81	if (has_log_file()) _log_file->flush();
duke@435	82	}
duke@435	83
duke@435	84	// advisory lock/unlock of _writer field:
duke@435	85	private:
duke@435	86	intx _writer; // thread_id with current rights to output
duke@435	87	intx _last_writer;
duke@435	88	public:
duke@435	89	intx hold(intx writer_id);
duke@435	90	void release(intx holder);
duke@435	91	intx writer() { return _writer; }
duke@435	92	bool has_log_file();
duke@435	93
duke@435	94	static defaultStream* instance; // sole instance
duke@435	95	};
stefank@2314	96
stefank@2314	97	#endif // SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP