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annotate src/share/vm/ci/ciSymbol.hpp @ 6972:bd7a7ce2e264

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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
author minqi
date Mon, 12 Nov 2012 14:03:53 -0800
parents da91efe96a93
children 2cb439954abf b2e698d2276c
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1 /*
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2 * Copyright (c) 1999, 2012, 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/ciBaseObject.hpp"
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29 #include "ci/ciObject.hpp"
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30 #include "ci/ciObjectFactory.hpp"
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31 #include "classfile/vmSymbols.hpp"
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32 #include "oops/symbol.hpp"
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33
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34 // ciSymbol
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35 //
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36 // This class represents a Symbol* in the HotSpot virtual
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37 // machine.
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38 class ciSymbol : public ciBaseObject {
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39 Symbol* _symbol;
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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 public:
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69 // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none.
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70 vmSymbols::SID sid() const { return _sid; }
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71
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72 // The text of the symbol as a null-terminated utf8 string.
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73 const char* as_utf8();
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74 int utf8_length();
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75
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76 // The text of the symbol as ascii with all non-printable characters quoted as \u####
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77 const char* as_quoted_ascii();
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78
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79 // Return the i-th utf8 byte, where i < utf8_length
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80 int byte_at(int i);
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81
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82 // Tests if the symbol starts with the given prefix.
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83 bool starts_with(const char* prefix, int len) const;
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84
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85 // Determines where the symbol contains the given substring.
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86 int index_of_at(int i, const char* str, int len) const;
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87
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88 void print_symbol_on(outputStream* st);
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89 void print_symbol() {
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90 print_symbol_on(tty);
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91 }
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92
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93 // Make a ciSymbol from a C string.
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94 // Consider adding to vmSymbols.hpp instead of using this constructor.
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95 // (Your code will be less subject to typographical bugs.)
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96 static ciSymbol* make(const char* s);
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97
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98 #define CI_SYMBOL_DECLARE(name, ignore_def) \
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99 static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); }
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100 VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE)
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101 #undef CI_SYMBOL_DECLARE
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102
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103 void print() {
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104 _symbol->print();
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105 }
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106
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107 virtual bool is_symbol() const { return true; }
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108
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109 // Are two ciSymbols equal?
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110 bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); }
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111
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112 bool is_signature_polymorphic_name() const;
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113 };
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114
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115 #endif // SHARE_VM_CI_CISYMBOL_HPP