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src/share/vm/utilities/utf8.hpp@bd7a7ce2e264 (annotated)

src/share/vm/utilities/utf8.hpp

Mon, 12 Nov 2012 14:03:53 -0800

author

minqi

date

Mon, 12 Nov 2012 14:03:53 -0800

changeset 4267

bd7a7ce2e264

parent 2708

1d1603768966

child 4851

8c03fc47511d

permissions

-rw-r--r--

6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com

duke@435	1	/*
minqi@4267	2	* Copyright (c) 1997, 2012, 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_UTF8_HPP
stefank@2314	26	#define SHARE_VM_UTILITIES_UTF8_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29	#include "utilities/top.hpp"
stefank@2314	30
duke@435	31	// Low-level interface for UTF8 strings
duke@435	32
duke@435	33	class UTF8 : AllStatic {
duke@435	34	public:
minqi@4267	35	// returns the unicode length of a 0-terminated utf8 string
minqi@4267	36	static int unicode_length(const char* utf8_str);
duke@435	37
minqi@4267	38	// returns the unicode length of a non-0-terminated utf8 string
minqi@4267	39	static int unicode_length(const char* utf8_str, int len);
duke@435	40
minqi@4267	41	// converts a utf8 string to a unicode string
duke@435	42	static void convert_to_unicode(const char* utf8_str, jchar* unicode_buffer, int unicode_length);
duke@435	43
minqi@4267	44	// returns the quoted ascii length of a utf8 string
minqi@4267	45	static int quoted_ascii_length(const char* utf8_str, int utf8_length);
minqi@4267	46
minqi@4267	47	// converts a utf8 string to quoted ascii
minqi@4267	48	static void as_quoted_ascii(const char* utf8_str, char* buf, int buflen);
minqi@4267	49
minqi@4267	50	// converts a quoted ascii string to utf8 string. returns the original
minqi@4267	51	// string unchanged if nothing needs to be done.
minqi@4267	52	static const char* from_quoted_ascii(const char* quoted_ascii_string);
minqi@4267	53
duke@435	54	// decodes the current utf8 character, stores the result in value,
minqi@4267	55	// and returns the end of the current utf8 chararacter.
duke@435	56	static char* next(const char* str, jchar* value);
duke@435	57
duke@435	58	// decodes the current utf8 character, gets the supplementary character instead of
duke@435	59	// the surrogate pair when seeing a supplementary character in string,
minqi@4267	60	// stores the result in value, and returns the end of the current utf8 chararacter.
duke@435	61	static char* next_character(const char* str, jint* value);
duke@435	62
duke@435	63	// Utility methods
coleenp@2497	64	static const jbyte* strrchr(const jbyte* base, int length, jbyte c);
coleenp@2497	65	static bool equal(const jbyte* base1, int length1, const jbyte* base2,int length2);
duke@435	66	static bool is_supplementary_character(const unsigned char* str);
duke@435	67	static jint get_supplementary_character(const unsigned char* str);
duke@435	68	};
duke@435	69
duke@435	70
duke@435	71	// Low-level interface for UNICODE strings
duke@435	72
duke@435	73	// A unicode string represents a string in the UTF-16 format in which supplementary
duke@435	74	// characters are represented by surrogate pairs. Index values refer to char code
duke@435	75	// units, so a supplementary character uses two positions in a unicode string.
duke@435	76
duke@435	77	class UNICODE : AllStatic {
duke@435	78	public:
duke@435	79	// returns the utf8 size of a unicode character
duke@435	80	static int utf8_size(jchar c);
duke@435	81
duke@435	82	// returns the utf8 length of a unicode string
duke@435	83	static int utf8_length(jchar* base, int length);
duke@435	84
duke@435	85	// converts a unicode string to utf8 string
duke@435	86	static void convert_to_utf8(const jchar* base, int length, char* utf8_buffer);
duke@435	87
duke@435	88	// converts a unicode string to a utf8 string; result is allocated
duke@435	89	// in resource area unless a buffer is provided.
duke@435	90	static char* as_utf8(jchar* base, int length);
duke@435	91	static char* as_utf8(jchar* base, int length, char* buf, int buflen);
minqi@4267	92
minqi@4267	93	// returns the quoted ascii length of a unicode string
minqi@4267	94	static int quoted_ascii_length(jchar* base, int length);
minqi@4267	95
minqi@4267	96	// converts a utf8 string to quoted ascii
minqi@4267	97	static void as_quoted_ascii(const jchar* base, int length, char* buf, int buflen);
duke@435	98	};
stefank@2314	99
stefank@2314	100	#endif // SHARE_VM_UTILITIES_UTF8_HPP