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comparison src/share/vm/ci/ciSymbol.hpp @ 1138:dd57230ba8fe

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6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
author twisti
date Tue, 05 Jan 2010 15:21:25 +0100
parents a61af66fc99e
children 1ecc8f0aad00 cd5dbf694d45
comparison
equal deleted inserted replaced
1137:97125851f396 1138:dd57230ba8fe
1 /* 1 /*
2 * Copyright 1999-2001 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 1999-2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
26 // 26 //
27 // This class represents a symbolOop in the HotSpot virtual 27 // This class represents a symbolOop in the HotSpot virtual
28 // machine. 28 // machine.
29 class ciSymbol : public ciObject { 29 class ciSymbol : public ciObject {
30 CI_PACKAGE_ACCESS 30 CI_PACKAGE_ACCESS
31 // These friends all make direct use of get_symbolOop:
31 friend class ciEnv; 32 friend class ciEnv;
32 friend class ciInstanceKlass; 33 friend class ciInstanceKlass;
33 friend class ciSignature; 34 friend class ciSignature;
34 friend class ciMethod; 35 friend class ciMethod;
35 friend class ciObjArrayKlass; 36 friend class ciObjArrayKlass;
36 37
37 private: 38 private:
38 ciSymbol(symbolOop s) : ciObject(s) {} 39 ciSymbol(symbolOop s) : ciObject(s) {}
39 ciSymbol(symbolHandle s); // for use with vmSymbolHandles 40 ciSymbol(symbolHandle s); // for use with vmSymbolHandles
40 41
41 symbolOop get_symbolOop() { return (symbolOop)get_oop(); } 42 symbolOop get_symbolOop() const { return (symbolOop)get_oop(); }
42 43
43 const char* type_string() { return "ciSymbol"; } 44 const char* type_string() { return "ciSymbol"; }
44 45
45 void print_impl(outputStream* st); 46 void print_impl(outputStream* st);
46 47
47 int byte_at(int i); 48 // This is public in symbolOop but private here, because the base can move:
48 jbyte* base(); 49 jbyte* base();
49 50
50 // Make a ciSymbol from a C string (implementation). 51 // Make a ciSymbol from a C string (implementation).
51 static ciSymbol* make_impl(const char* s); 52 static ciSymbol* make_impl(const char* s);
52 53
53 public: 54 public:
54 // The text of the symbol as a null-terminated utf8 string. 55 // The text of the symbol as a null-terminated utf8 string.
55 const char* as_utf8(); 56 const char* as_utf8();
56 int utf8_length(); 57 int utf8_length();
58
59 // Return the i-th utf8 byte, where i < utf8_length
60 int byte_at(int i);
61
62 // Tests if the symbol starts with the given prefix.
63 bool starts_with(const char* prefix, int len) const;
64
65 // Determines where the symbol contains the given substring.
66 int index_of_at(int i, const char* str, int len) const;
57 67
58 // What kind of ciObject is this? 68 // What kind of ciObject is this?
59 bool is_symbol() { return true; } 69 bool is_symbol() { return true; }
60 70
61 void print_symbol_on(outputStream* st); 71 void print_symbol_on(outputStream* st);