Mercurial > hg > truffle
annotate src/share/vm/ci/ciSignature.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 |
|---|---|
| date | Tue, 07 Dec 2010 21:55:53 -0800 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 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/ciSignature.hpp" | |
| 27 #include "ci/ciUtilities.hpp" | |
| 28 #include "memory/allocation.inline.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 30 #include "runtime/signature.hpp" | |
| 0 | 31 |
| 32 // ciSignature | |
| 33 // | |
| 34 // This class represents the signature of a method. | |
| 35 | |
| 36 // ------------------------------------------------------------------ | |
| 37 // ciSignature::ciSignature | |
| 38 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol) { | |
| 39 ASSERT_IN_VM; | |
| 40 EXCEPTION_CONTEXT; | |
| 41 _accessing_klass = accessing_klass; | |
| 42 _symbol = symbol; | |
| 43 | |
| 44 ciEnv* env = CURRENT_ENV; | |
| 45 Arena* arena = env->arena(); | |
| 46 _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL); | |
| 47 | |
| 48 int size = 0; | |
| 49 int count = 0; | |
| 50 symbolHandle sh (THREAD, symbol->get_symbolOop()); | |
| 51 SignatureStream ss(sh); | |
| 52 for (; ; ss.next()) { | |
| 53 // Process one element of the signature | |
| 54 ciType* type; | |
| 55 if (!ss.is_object()) { | |
| 56 type = ciType::make(ss.type()); | |
| 57 } else { | |
| 58 symbolOop name = ss.as_symbol(THREAD); | |
| 59 if (HAS_PENDING_EXCEPTION) { | |
| 60 type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass() | |
| 61 : (ciType*)ciEnv::unloaded_ciinstance_klass(); | |
| 62 env->record_out_of_memory_failure(); | |
| 63 CLEAR_PENDING_EXCEPTION; | |
| 64 } else { | |
| 65 ciSymbol* klass_name = env->get_object(name)->as_symbol(); | |
| 66 type = env->get_klass_by_name_impl(_accessing_klass, klass_name, false); | |
| 67 } | |
| 68 } | |
| 69 _types->append(type); | |
| 70 if (ss.at_return_type()) { | |
| 71 // Done processing the return type; do not add it into the count. | |
| 72 break; | |
| 73 } | |
| 74 size += type->size(); | |
| 75 count++; | |
| 76 } | |
| 77 _size = size; | |
| 78 _count = count; | |
| 79 } | |
| 80 | |
| 81 // ------------------------------------------------------------------ | |
| 82 // ciSignature::return_ciType | |
| 83 // | |
| 84 // What is the return type of this signature? | |
| 85 ciType* ciSignature::return_type() const { | |
| 86 return _types->at(_count); | |
| 87 } | |
| 88 | |
| 89 // ------------------------------------------------------------------ | |
| 90 // ciSignature::ciType_at | |
| 91 // | |
| 92 // What is the type of the index'th element of this | |
| 93 // signature? | |
| 94 ciType* ciSignature::type_at(int index) const { | |
| 95 assert(index < _count, "out of bounds"); | |
| 96 // The first _klasses element holds the return klass. | |
| 97 return _types->at(index); | |
| 98 } | |
| 99 | |
| 100 // ------------------------------------------------------------------ | |
| 101 // ciSignature::print_signature | |
| 102 void ciSignature::print_signature() { | |
| 103 _symbol->print_symbol(); | |
| 104 } | |
| 105 | |
| 106 // ------------------------------------------------------------------ | |
| 107 // ciSignature::print | |
| 108 void ciSignature::print() { | |
| 109 tty->print("<ciSignature symbol="); | |
| 110 print_signature(); | |
| 111 tty->print(" accessing_klass="); | |
| 112 _accessing_klass->print(); | |
| 113 tty->print(" address=0x%x>", (address)this); | |
| 114 } |