Tue, 18 Jun 2013 12:31:07 -0700
8015237: Parallelize string table scanning during strong root processing
Summary: Parallelize the scanning of the intern string table by having each GC worker claim a given number of buckets. Changes were also reviewed by Per Liden <per.liden@oracle.com>.
Reviewed-by: tschatzl, stefank, twisti
duke@435 | 1 | /* |
coleenp@4037 | 2 | * Copyright (c) 1999, 2012, 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; |
duke@435 | 47 | friend class ciObjArrayKlass; |
duke@435 | 48 | |
duke@435 | 49 | private: |
jrose@1862 | 50 | const vmSymbols::SID _sid; |
coleenp@2497 | 51 | DEBUG_ONLY( bool sid_ok() { return vmSymbols::find_sid(get_symbol()) == _sid; } ) |
jrose@1862 | 52 | |
coleenp@2497 | 53 | ciSymbol(Symbol* s); // normal case, for symbols not mentioned in vmSymbols |
coleenp@2497 | 54 | ciSymbol(Symbol* s, vmSymbols::SID sid); // for use with vmSymbols |
duke@435 | 55 | |
coleenp@2497 | 56 | Symbol* get_symbol() const { return _symbol; } |
duke@435 | 57 | |
duke@435 | 58 | const char* type_string() { return "ciSymbol"; } |
duke@435 | 59 | |
duke@435 | 60 | void print_impl(outputStream* st); |
duke@435 | 61 | |
coleenp@2497 | 62 | // This is public in Symbol* but private here, because the base can move: |
coleenp@2497 | 63 | const jbyte* base(); |
duke@435 | 64 | |
duke@435 | 65 | // Make a ciSymbol from a C string (implementation). |
duke@435 | 66 | static ciSymbol* make_impl(const char* s); |
duke@435 | 67 | |
duke@435 | 68 | public: |
jrose@1862 | 69 | // The enumeration ID from vmSymbols, or vmSymbols::NO_SID if none. |
jrose@1862 | 70 | vmSymbols::SID sid() const { return _sid; } |
jrose@1862 | 71 | |
duke@435 | 72 | // The text of the symbol as a null-terminated utf8 string. |
duke@435 | 73 | const char* as_utf8(); |
duke@435 | 74 | int utf8_length(); |
duke@435 | 75 | |
minqi@4267 | 76 | // The text of the symbol as ascii with all non-printable characters quoted as \u#### |
minqi@4267 | 77 | const char* as_quoted_ascii(); |
minqi@4267 | 78 | |
twisti@1573 | 79 | // Return the i-th utf8 byte, where i < utf8_length |
twisti@1573 | 80 | int byte_at(int i); |
twisti@1573 | 81 | |
twisti@1573 | 82 | // Tests if the symbol starts with the given prefix. |
twisti@1573 | 83 | bool starts_with(const char* prefix, int len) const; |
twisti@1573 | 84 | |
twisti@1573 | 85 | // Determines where the symbol contains the given substring. |
twisti@1573 | 86 | int index_of_at(int i, const char* str, int len) const; |
twisti@1573 | 87 | |
duke@435 | 88 | void print_symbol_on(outputStream* st); |
duke@435 | 89 | void print_symbol() { |
duke@435 | 90 | print_symbol_on(tty); |
duke@435 | 91 | } |
duke@435 | 92 | |
duke@435 | 93 | // Make a ciSymbol from a C string. |
duke@435 | 94 | // Consider adding to vmSymbols.hpp instead of using this constructor. |
duke@435 | 95 | // (Your code will be less subject to typographical bugs.) |
duke@435 | 96 | static ciSymbol* make(const char* s); |
duke@435 | 97 | |
duke@435 | 98 | #define CI_SYMBOL_DECLARE(name, ignore_def) \ |
duke@435 | 99 | static ciSymbol* name() { return ciObjectFactory::vm_symbol_at(vmSymbols::VM_SYMBOL_ENUM_NAME(name)); } |
duke@435 | 100 | VM_SYMBOLS_DO(CI_SYMBOL_DECLARE, CI_SYMBOL_DECLARE) |
duke@435 | 101 | #undef CI_SYMBOL_DECLARE |
coleenp@2497 | 102 | |
coleenp@2497 | 103 | void print() { |
coleenp@2497 | 104 | _symbol->print(); |
coleenp@2497 | 105 | } |
coleenp@2497 | 106 | |
coleenp@4037 | 107 | virtual bool is_symbol() const { return true; } |
coleenp@4037 | 108 | |
coleenp@2497 | 109 | // Are two ciSymbols equal? |
coleenp@2497 | 110 | bool equals(ciSymbol* obj) { return this->_symbol == obj->get_symbol(); } |
twisti@3969 | 111 | |
twisti@3969 | 112 | bool is_signature_polymorphic_name() const; |
duke@435 | 113 | }; |
stefank@2314 | 114 | |
stefank@2314 | 115 | #endif // SHARE_VM_CI_CISYMBOL_HPP |