Mercurial > hg > truffle
annotate src/share/vm/ci/ciSymbol.cpp @ 3762:5c0a3c1858b1
7048782: CMS: assert(last_chunk_index_to_check<= last_chunk_index) failed: parCardTableModRefBS.cpp:359
Summary: The LNC array is sized before the start of a scavenge, while the heap may expand during a scavenge. With CMS, the last block of an arbitrary suffice of the LNC array may expand due to coalition with the expansion delta. We now take care not to attempt access past the end of the LNC array. LNC array code will be cleaned up and suitably encapsulated as part of the forthcoming performance RFE 7043675.
Reviewed-by: brutisso
| author | ysr |
|---|---|
| date | Thu, 02 Jun 2011 10:23:36 -0700 |
| parents | 1d1603768966 |
| children | 1d7922586cf6 |
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| 0 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 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 | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/ciSymbol.hpp" | |
| 27 #include "ci/ciUtilities.hpp" | |
| 28 #include "memory/oopFactory.hpp" | |
| 0 | 29 |
| 30 // ------------------------------------------------------------------ | |
| 31 // ciSymbol::ciSymbol | |
| 32 // | |
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33 // Preallocated symbol variant. Used with symbols from vmSymbols. |
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34 ciSymbol::ciSymbol(Symbol* s, vmSymbols::SID sid) |
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35 : _symbol(s), _sid(sid) |
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36 { |
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37 assert(_symbol != NULL, "adding null symbol"); |
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38 _symbol->increment_refcount(); // increment ref count |
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39 assert(sid_ok(), "must be in vmSymbols"); |
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40 } |
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41 |
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42 // Normal case for non-famous symbols. |
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43 ciSymbol::ciSymbol(Symbol* s) |
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44 : _symbol(s), _sid(vmSymbols::NO_SID) |
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45 { |
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46 assert(_symbol != NULL, "adding null symbol"); |
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47 _symbol->increment_refcount(); // increment ref count |
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48 assert(sid_ok(), "must not be in vmSymbols"); |
| 0 | 49 } |
| 50 | |
| 51 // ciSymbol | |
| 52 // | |
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53 // This class represents a Symbol* in the HotSpot virtual |
| 0 | 54 // machine. |
| 55 | |
| 56 // ------------------------------------------------------------------ | |
| 57 // ciSymbol::as_utf8 | |
| 58 // | |
| 59 // The text of the symbol as a null-terminated C string. | |
| 60 const char* ciSymbol::as_utf8() { | |
| 61 VM_QUICK_ENTRY_MARK; | |
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62 Symbol* s = get_symbol(); |
| 0 | 63 return s->as_utf8(); |
| 64 } | |
| 65 | |
| 66 // ------------------------------------------------------------------ | |
| 67 // ciSymbol::base | |
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68 const jbyte* ciSymbol::base() { |
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69 GUARDED_VM_ENTRY(return get_symbol()->base();) |
| 0 | 70 } |
| 71 | |
| 72 // ------------------------------------------------------------------ | |
| 73 // ciSymbol::byte_at | |
| 74 int ciSymbol::byte_at(int i) { | |
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75 GUARDED_VM_ENTRY(return get_symbol()->byte_at(i);) |
| 0 | 76 } |
| 77 | |
| 78 // ------------------------------------------------------------------ | |
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79 // ciSymbol::starts_with |
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80 // |
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81 // Tests if the symbol starts with the given prefix. |
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82 bool ciSymbol::starts_with(const char* prefix, int len) const { |
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83 GUARDED_VM_ENTRY(return get_symbol()->starts_with(prefix, len);) |
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84 } |
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85 |
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86 // ------------------------------------------------------------------ |
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87 // ciSymbol::index_of |
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88 // |
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89 // Determines where the symbol contains the given substring. |
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90 int ciSymbol::index_of_at(int i, const char* str, int len) const { |
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91 GUARDED_VM_ENTRY(return get_symbol()->index_of_at(i, str, len);) |
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92 } |
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93 |
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94 // ------------------------------------------------------------------ |
| 0 | 95 // ciSymbol::utf8_length |
| 96 int ciSymbol::utf8_length() { | |
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97 GUARDED_VM_ENTRY(return get_symbol()->utf8_length();) |
| 0 | 98 } |
| 99 | |
| 100 // ------------------------------------------------------------------ | |
| 101 // ciSymbol::print_impl | |
| 102 // | |
| 103 // Implementation of the print method | |
| 104 void ciSymbol::print_impl(outputStream* st) { | |
| 105 st->print(" value="); | |
| 106 print_symbol_on(st); | |
| 107 } | |
| 108 | |
| 109 // ------------------------------------------------------------------ | |
| 110 // ciSymbol::print_symbol_on | |
| 111 // | |
| 112 // Print the value of this symbol on an outputStream | |
| 113 void ciSymbol::print_symbol_on(outputStream *st) { | |
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114 GUARDED_VM_ENTRY(get_symbol()->print_symbol_on(st);) |
| 0 | 115 } |
| 116 | |
| 117 // ------------------------------------------------------------------ | |
| 118 // ciSymbol::make_impl | |
| 119 // | |
| 120 // Make a ciSymbol from a C string (implementation). | |
| 121 ciSymbol* ciSymbol::make_impl(const char* s) { | |
| 122 EXCEPTION_CONTEXT; | |
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123 TempNewSymbol sym = SymbolTable::new_symbol(s, THREAD); |
| 0 | 124 if (HAS_PENDING_EXCEPTION) { |
| 125 CLEAR_PENDING_EXCEPTION; | |
| 126 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
| 127 return ciEnv::_unloaded_cisymbol; | |
| 128 } | |
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129 return CURRENT_THREAD_ENV->get_symbol(sym); |
| 0 | 130 } |
| 131 | |
| 132 // ------------------------------------------------------------------ | |
| 133 // ciSymbol::make | |
| 134 // | |
| 135 // Make a ciSymbol from a C string. | |
| 136 ciSymbol* ciSymbol::make(const char* s) { | |
| 137 GUARDED_VM_ENTRY(return make_impl(s);) | |
| 138 } |