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annotate src/share/vm/ci/ciSymbol.hpp @ 6266:1d7922586cf6

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7023639: JSR 292 method handle invocation needs a fast path for compiled code 6984705: JSR 292 method handle creation should not go through JNI Summary: remove assembly code for JDK 7 chained method handles Reviewed-by: jrose, twisti, kvn, mhaupt Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
author twisti
date Tue, 24 Jul 2012 10:51:00 -0700
parents 1d1603768966
children 957c266d8bc5 da91efe96a93
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1 /*
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_CI_CISYMBOL_HPP
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26 #define SHARE_VM_CI_CISYMBOL_HPP
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27
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28 #include "ci/ciObject.hpp"
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29 #include "ci/ciObjectFactory.hpp"
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30 #include "classfile/vmSymbols.hpp"
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31 #include "oops/symbol.hpp"
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32
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33 // ciSymbol
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34 //
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35 // This class represents a Symbol* in the HotSpot virtual
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36 // machine.
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37 class ciSymbol : public ResourceObj {
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38 Symbol* _symbol;
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39 uint _ident;
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40
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41 CI_PACKAGE_ACCESS
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42 // These friends all make direct use of get_symbol:
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43 friend class ciEnv;
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44 friend class ciInstanceKlass;
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45 friend class ciSignature;
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46 friend class ciMethod;
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47 friend class ciObjArrayKlass;
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48
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49 private:
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50 const vmSymbols::SID _sid;
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51 DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } )
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52
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53 ciSymbol(Symbol* s); // normal case, for symbols not mentioned in vmSymbols
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54 ciSymbol(Symbol* s, vmSymbols::SID sid); // for use with vmSymbols
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55
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56 Symbol* get_symbol() const { return _symbol; }
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57
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58 const char* type_string() { return "ciSymbol"; }
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59
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60 void print_impl(outputStream* st);
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61
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62 // This is public in Symbol* but private here, because the base can move:
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63 const jbyte* base();
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64
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65 // Make a ciSymbol from a C string (implementation).
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66 static ciSymbol* make_impl(const char* s);
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67
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68 void set_ident(uint id) { _ident = id; }
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69 public:
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70 // A number unique to this object.
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71 uint ident() { return _ident; }
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72
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73 // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.
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74 vmSymbols::SID sid() const { return _sid; }
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75
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76 // The text of the symbol as a null-terminated utf8 string.
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77 const char* as_utf8();
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78 int utf8_length();
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79
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80 // Return the i-th utf8 byte, where i < utf8_length
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81 int byte_at(int i);
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82
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83 // Tests if the symbol starts with the given prefix.
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84 bool starts_with(const char* prefix, int len) const;
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85
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86 // Determines where the symbol contains the given substring.
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87 int index_of_at(int i, const char* str, int len) const;
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88
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89 void print_symbol_on(outputStream* st);
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90 void print_symbol() {
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91 print_symbol_on(tty);
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92 }
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93
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94 // Make a ciSymbol from a C string.
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95 // Consider adding to vmSymbols.hpp instead of using this constructor.
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96 // (Your code will be less subject to typographical bugs.)
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97 static ciSymbol* make(const char* s);
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98
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99 #define CI_SYMBOL_DECLARE(name, ignore_def) \
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100 static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }
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101 VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)
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102 #undef CI_SYMBOL_DECLARE
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103
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104 void print() {
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105 _symbol->print();
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106 }
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107
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108 // Are two ciSymbols equal?
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109 bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }
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110
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111 bool is_signature_polymorphic_name() const;
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112 };
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113
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114 #endif // SHARE_VM_CI_CISYMBOL_HPP