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comparison src/share/vm/ci/ciSymbol.hpp @ 2177:3582bf76420e

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6990754: Use native memory and reference counting to implement SymbolTable Summary: move symbols from permgen into C heap and reference count them Reviewed-by: never, acorn, jmasa, stefank
author coleenp
date Thu, 27 Jan 2011 16:11:27 -0800
parents f95d63e2154a
children d25d4ca69222 1d1603768966
comparison
equal deleted inserted replaced
2176:27e4ea99855d 2177:3582bf76420e
26 #define SHARE_VM_CI_CISYMBOL_HPP 26 #define SHARE_VM_CI_CISYMBOL_HPP
27 27
28 #include "ci/ciObject.hpp" 28 #include "ci/ciObject.hpp"
29 #include "ci/ciObjectFactory.hpp" 29 #include "ci/ciObjectFactory.hpp"
30 #include "classfile/vmSymbols.hpp" 30 #include "classfile/vmSymbols.hpp"
31 #include "oops/symbolOop.hpp" 31 #include "oops/symbol.hpp"
32 32
33 // ciSymbol 33 // ciSymbol
34 // 34 //
35 // This class represents a symbolOop in the HotSpot virtual 35 // This class represents a Symbol* in the HotSpot virtual
36 // machine. 36 // machine.
37 class ciSymbol : public ciObject { 37 class ciSymbol : public ResourceObj {
38 Symbol* _symbol;
39 uint _ident;
40
38 CI_PACKAGE_ACCESS 41 CI_PACKAGE_ACCESS
39 // These friends all make direct use of get_symbolOop: 42 // These friends all make direct use of get_symbol:
40 friend class ciEnv; 43 friend class ciEnv;
41 friend class ciInstanceKlass; 44 friend class ciInstanceKlass;
42 friend class ciSignature; 45 friend class ciSignature;
43 friend class ciMethod; 46 friend class ciMethod;
44 friend class ciObjArrayKlass; 47 friend class ciObjArrayKlass;
45 48
46 private: 49 private:
47 const vmSymbols::SID _sid; 50 const vmSymbols::SID _sid;
48 DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbolOop()) == _sid; } ) 51 DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } )
49 52
50 ciSymbol(symbolOop s); // normal case, for symbols not mentioned in vmSymbols 53 ciSymbol(Symbol* s); // normal case, for symbols not mentioned in vmSymbols
51 ciSymbol(symbolHandle s, vmSymbols::SID sid); // for use with vmSymbolHandles 54 ciSymbol(Symbol* s, vmSymbols::SID sid); // for use with vmSymbols
52 55
53 symbolOop get_symbolOop() const { return (symbolOop)get_oop(); } 56 Symbol* get_symbol() const { return _symbol; }
54 57
55 const char* type_string() { return "ciSymbol"; } 58 const char* type_string() { return "ciSymbol"; }
56 59
57 void print_impl(outputStream* st); 60 void print_impl(outputStream* st);
58 61
59 // This is public in symbolOop but private here, because the base can move: 62 // This is public in Symbol* but private here, because the base can move:
60 jbyte* base(); 63 const jbyte* base();
61 64
62 // Make a ciSymbol from a C string (implementation). 65 // Make a ciSymbol from a C string (implementation).
63 static ciSymbol* make_impl(const char* s); 66 static ciSymbol* make_impl(const char* s);
64 67
68 void set_ident(uint id) { _ident = id; }
65 public: 69 public:
70 // A number unique to this object.
71 uint ident() { return _ident; }
72
66 // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none. 73 // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.
67 vmSymbols::SID sid() const { return _sid; } 74 vmSymbols::SID sid() const { return _sid; }
68 75
69 // The text of the symbol as a null-terminated utf8 string. 76 // The text of the symbol as a null-terminated utf8 string.
70 const char* as_utf8(); 77 const char* as_utf8();
77 bool starts_with(const char* prefix, int len) const; 84 bool starts_with(const char* prefix, int len) const;
78 85
79 // Determines where the symbol contains the given substring. 86 // Determines where the symbol contains the given substring.
80 int index_of_at(int i, const char* str, int len) const; 87 int index_of_at(int i, const char* str, int len) const;
81 88
82 // What kind of ciObject is this?
83 bool is_symbol() { return true; }
84
85 void print_symbol_on(outputStream* st); 89 void print_symbol_on(outputStream* st);
86 void print_symbol() { 90 void print_symbol() {
87 print_symbol_on(tty); 91 print_symbol_on(tty);
88 } 92 }
89 93
94 98
95 #define CI_SYMBOL_DECLARE(name, ignore_def) \ 99 #define CI_SYMBOL_DECLARE(name, ignore_def) \
96 static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); } 100 static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }
97 VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE) 101 VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)
98 #undef CI_SYMBOL_DECLARE 102 #undef CI_SYMBOL_DECLARE
103
104 void print() {
105 _symbol->print();
106 }
107
108 // Are two ciSymbols equal?
109 bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }
99 }; 110 };
100 111
101 #endif // SHARE_VM_CI_CISYMBOL_HPP 112 #endif // SHARE_VM_CI_CISYMBOL_HPP