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src/share/vm/ci/ciSymbol.hpp@bd7a7ce2e264 (annotated)

src/share/vm/ci/ciSymbol.hpp

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

author

minqi

date

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

changeset 4267

bd7a7ce2e264

parent 4037

da91efe96a93

child 5732

b2e698d2276c

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	/*
coleenp@4037	2	* Copyright (c) 1999, 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_CI_CISYMBOL_HPP
stefank@2314	26	#define SHARE_VM_CI_CISYMBOL_HPP
stefank@2314	27
coleenp@4037	28	#include "ci/ciBaseObject.hpp"
stefank@2314	29	#include "ci/ciObject.hpp"
stefank@2314	30	#include "ci/ciObjectFactory.hpp"
stefank@2314	31	#include "classfile/vmSymbols.hpp"
coleenp@2497	32	#include "oops/symbol.hpp"
stefank@2314	33
duke@435	34	// ciSymbol
duke@435	35	//
coleenp@2497	36	// This class represents a Symbol* in the HotSpot virtual
duke@435	37	// machine.
coleenp@4037	38	class ciSymbol : public ciBaseObject {
coleenp@2497	39	Symbol* _symbol;
coleenp@2497	40
duke@435	41	CI_PACKAGE_ACCESS
coleenp@2497	42	// These friends all make direct use of get_symbol:
duke@435	43	friend class ciEnv;
duke@435	44	friend class ciInstanceKlass;
duke@435	45	friend class ciSignature;
duke@435	46	friend class ciMethod;
duke@435	47	friend class ciObjArrayKlass;
duke@435	48
duke@435	49	private:
jrose@1862	50	const vmSymbols::SID _sid;
coleenp@2497	51	DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } )
jrose@1862	52
coleenp@2497	53	ciSymbol(Symbol* s); // normal case, for symbols not mentioned in vmSymbols
coleenp@2497	54	ciSymbol(Symbol* s, vmSymbols::SID sid); // for use with vmSymbols
duke@435	55
coleenp@2497	56	Symbol* get_symbol() const { return _symbol; }
duke@435	57
duke@435	58	const char* type_string() { return "ciSymbol"; }
duke@435	59
duke@435	60	void print_impl(outputStream* st);
duke@435	61
coleenp@2497	62	// This is public in Symbol* but private here, because the base can move:
coleenp@2497	63	const jbyte* base();
duke@435	64
duke@435	65	// Make a ciSymbol from a C string (implementation).
duke@435	66	static ciSymbol* make_impl(const char* s);
duke@435	67
duke@435	68	public:
jrose@1862	69	// The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.
jrose@1862	70	vmSymbols::SID sid() const { return _sid; }
jrose@1862	71
duke@435	72	// The text of the symbol as a null-terminated utf8 string.
duke@435	73	const char* as_utf8();
duke@435	74	int utf8_length();
duke@435	75
minqi@4267	76	// The text of the symbol as ascii with all non-printable characters quoted as \u####
minqi@4267	77	const char* as_quoted_ascii();
minqi@4267	78
twisti@1573	79	// Return the i-th utf8 byte, where i < utf8_length
twisti@1573	80	int byte_at(int i);
twisti@1573	81
twisti@1573	82	// Tests if the symbol starts with the given prefix.
twisti@1573	83	bool starts_with(const char* prefix, int len) const;
twisti@1573	84
twisti@1573	85	// Determines where the symbol contains the given substring.
twisti@1573	86	int index_of_at(int i, const char* str, int len) const;
twisti@1573	87
duke@435	88	void print_symbol_on(outputStream* st);
duke@435	89	void print_symbol() {
duke@435	90	print_symbol_on(tty);
duke@435	91	}
duke@435	92
duke@435	93	// Make a ciSymbol from a C string.
duke@435	94	// Consider adding to vmSymbols.hpp instead of using this constructor.
duke@435	95	// (Your code will be less subject to typographical bugs.)
duke@435	96	static ciSymbol* make(const char* s);
duke@435	97
duke@435	98	#define CI_SYMBOL_DECLARE(name, ignore_def) \
duke@435	99	static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }
duke@435	100	VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)
duke@435	101	#undef CI_SYMBOL_DECLARE
coleenp@2497	102
coleenp@2497	103	void print() {
coleenp@2497	104	_symbol->print();
coleenp@2497	105	}
coleenp@2497	106
coleenp@4037	107	virtual bool is_symbol() const { return true; }
coleenp@4037	108
coleenp@2497	109	// Are two ciSymbols equal?
coleenp@2497	110	bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }
twisti@3969	111
twisti@3969	112	bool is_signature_polymorphic_name() const;
duke@435	113	};
stefank@2314	114
stefank@2314	115	#endif // SHARE_VM_CI_CISYMBOL_HPP