Mercurial > hg > truffle
annotate src/share/vm/ci/ciSymbol.cpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
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date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | 3582bf76420e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 2010, 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 // | |
33 // Preallocated handle variant. Used with handles from vmSymboHandles. | |
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34 ciSymbol::ciSymbol(symbolHandle h_s, vmSymbols::SID sid) |
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35 : ciObject(h_s), _sid(sid) |
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36 { |
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37 assert(sid_ok(), "must be in vmSymbols"); |
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38 } |
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39 |
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40 // Normal case for non-famous symbols. |
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41 ciSymbol::ciSymbol(symbolOop s) |
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42 : ciObject(s), _sid(vmSymbols::NO_SID) |
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43 { |
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44 assert(sid_ok(), "must not be in vmSymbols"); |
0 | 45 } |
46 | |
47 // ciSymbol | |
48 // | |
49 // This class represents a symbolOop in the HotSpot virtual | |
50 // machine. | |
51 | |
52 // ------------------------------------------------------------------ | |
53 // ciSymbol::as_utf8 | |
54 // | |
55 // The text of the symbol as a null-terminated C string. | |
56 const char* ciSymbol::as_utf8() { | |
57 VM_QUICK_ENTRY_MARK; | |
58 symbolOop s = get_symbolOop(); | |
59 return s->as_utf8(); | |
60 } | |
61 | |
62 // ------------------------------------------------------------------ | |
63 // ciSymbol::base | |
64 jbyte* ciSymbol::base() { | |
65 GUARDED_VM_ENTRY(return get_symbolOop()->base();) | |
66 } | |
67 | |
68 // ------------------------------------------------------------------ | |
69 // ciSymbol::byte_at | |
70 int ciSymbol::byte_at(int i) { | |
71 GUARDED_VM_ENTRY(return get_symbolOop()->byte_at(i);) | |
72 } | |
73 | |
74 // ------------------------------------------------------------------ | |
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75 // ciSymbol::starts_with |
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76 // |
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77 // Tests if the symbol starts with the given prefix. |
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78 bool ciSymbol::starts_with(const char* prefix, int len) const { |
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79 GUARDED_VM_ENTRY(return get_symbolOop()->starts_with(prefix, len);) |
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80 } |
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81 |
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82 // ------------------------------------------------------------------ |
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83 // ciSymbol::index_of |
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84 // |
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85 // Determines where the symbol contains the given substring. |
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86 int ciSymbol::index_of_at(int i, const char* str, int len) const { |
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87 GUARDED_VM_ENTRY(return get_symbolOop()->index_of_at(i, str, len);) |
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88 } |
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89 |
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90 // ------------------------------------------------------------------ |
0 | 91 // ciSymbol::utf8_length |
92 int ciSymbol::utf8_length() { | |
93 GUARDED_VM_ENTRY(return get_symbolOop()->utf8_length();) | |
94 } | |
95 | |
96 // ------------------------------------------------------------------ | |
97 // ciSymbol::print_impl | |
98 // | |
99 // Implementation of the print method | |
100 void ciSymbol::print_impl(outputStream* st) { | |
101 st->print(" value="); | |
102 print_symbol_on(st); | |
103 } | |
104 | |
105 // ------------------------------------------------------------------ | |
106 // ciSymbol::print_symbol_on | |
107 // | |
108 // Print the value of this symbol on an outputStream | |
109 void ciSymbol::print_symbol_on(outputStream *st) { | |
110 GUARDED_VM_ENTRY(get_symbolOop()->print_symbol_on(st);) | |
111 } | |
112 | |
113 // ------------------------------------------------------------------ | |
114 // ciSymbol::make_impl | |
115 // | |
116 // Make a ciSymbol from a C string (implementation). | |
117 ciSymbol* ciSymbol::make_impl(const char* s) { | |
118 EXCEPTION_CONTEXT; | |
119 // For some reason, oopFactory::new_symbol doesn't declare its | |
120 // char* argument as const. | |
121 symbolOop sym = oopFactory::new_symbol((char*)s, (int)strlen(s), THREAD); | |
122 if (HAS_PENDING_EXCEPTION) { | |
123 CLEAR_PENDING_EXCEPTION; | |
124 CURRENT_THREAD_ENV->record_out_of_memory_failure(); | |
125 return ciEnv::_unloaded_cisymbol; | |
126 } | |
127 return CURRENT_THREAD_ENV->get_object(sym)->as_symbol(); | |
128 } | |
129 | |
130 // ------------------------------------------------------------------ | |
131 // ciSymbol::make | |
132 // | |
133 // Make a ciSymbol from a C string. | |
134 ciSymbol* ciSymbol::make(const char* s) { | |
135 GUARDED_VM_ENTRY(return make_impl(s);) | |
136 } |