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src/share/vm/ci/ciSymbol.hpp@b2ee5dc63353 (annotated)

src/share/vm/ci/ciSymbol.hpp

Wed, 23 Oct 2013 12:40:23 +0200

author

roland

date

Wed, 23 Oct 2013 12:40:23 +0200

changeset 5991

b2ee5dc63353

parent 5732

b2e698d2276c

child 6876

710a3c8b516e

permissions

-rw-r--r--

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

duke@435	1	/*
drchase@5732	2	* Copyright (c) 1999, 2013, 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;
drchase@5732	47	friend class ciField;
duke@435	48	friend class ciObjArrayKlass;
duke@435	49
duke@435	50	private:
jrose@1862	51	const vmSymbols::SID _sid;
coleenp@2497	52	DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } )
jrose@1862	53
coleenp@2497	54	ciSymbol(Symbol* s); // normal case, for symbols not mentioned in vmSymbols
coleenp@2497	55	ciSymbol(Symbol* s, vmSymbols::SID sid); // for use with vmSymbols
duke@435	56
coleenp@2497	57	Symbol* get_symbol() const { return _symbol; }
duke@435	58
duke@435	59	const char* type_string() { return "ciSymbol"; }
duke@435	60
duke@435	61	void print_impl(outputStream* st);
duke@435	62
coleenp@2497	63	// This is public in Symbol* but private here, because the base can move:
coleenp@2497	64	const jbyte* base();
duke@435	65
duke@435	66	// Make a ciSymbol from a C string (implementation).
duke@435	67	static ciSymbol* make_impl(const char* s);
duke@435	68
duke@435	69	public:
jrose@1862	70	// The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.
jrose@1862	71	vmSymbols::SID sid() const { return _sid; }
jrose@1862	72
duke@435	73	// The text of the symbol as a null-terminated utf8 string.
duke@435	74	const char* as_utf8();
duke@435	75	int utf8_length();
duke@435	76
minqi@4267	77	// The text of the symbol as ascii with all non-printable characters quoted as \u####
minqi@4267	78	const char* as_quoted_ascii();
minqi@4267	79
twisti@1573	80	// Return the i-th utf8 byte, where i < utf8_length
twisti@1573	81	int byte_at(int i);
twisti@1573	82
twisti@1573	83	// Tests if the symbol starts with the given prefix.
twisti@1573	84	bool starts_with(const char* prefix, int len) const;
twisti@1573	85
twisti@1573	86	// Determines where the symbol contains the given substring.
twisti@1573	87	int index_of_at(int i, const char* str, int len) const;
twisti@1573	88
duke@435	89	void print_symbol_on(outputStream* st);
duke@435	90	void print_symbol() {
duke@435	91	print_symbol_on(tty);
duke@435	92	}
duke@435	93
duke@435	94	// Make a ciSymbol from a C string.
duke@435	95	// Consider adding to vmSymbols.hpp instead of using this constructor.
duke@435	96	// (Your code will be less subject to typographical bugs.)
duke@435	97	static ciSymbol* make(const char* s);
duke@435	98
duke@435	99	#define CI_SYMBOL_DECLARE(name, ignore_def) \
duke@435	100	static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }
duke@435	101	VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)
duke@435	102	#undef CI_SYMBOL_DECLARE
coleenp@2497	103
coleenp@2497	104	void print() {
coleenp@2497	105	_symbol->print();
coleenp@2497	106	}
coleenp@2497	107
coleenp@4037	108	virtual bool is_symbol() const { return true; }
coleenp@4037	109
coleenp@2497	110	// Are two ciSymbols equal?
coleenp@2497	111	bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }
twisti@3969	112
twisti@3969	113	bool is_signature_polymorphic_name() const;
duke@435	114	};
stefank@2314	115
stefank@2314	116	#endif // SHARE_VM_CI_CISYMBOL_HPP