Mercurial > hg > truffle
annotate src/share/vm/memory/classify.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved. |
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| 5 * This code is free software; you can redistribute it and/or modify it | |
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| 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. | |
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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 | |
| 25 typedef enum oop_type { | |
| 26 unknown_type, | |
| 27 instance_type, | |
| 28 instanceRef_type, | |
| 29 objArray_type, | |
| 30 symbol_type, | |
| 31 klass_type, | |
| 32 instanceKlass_type, | |
| 33 method_type, | |
| 34 constMethod_type, | |
| 35 methodData_type, | |
| 36 constantPool_type, | |
| 37 constantPoolCache_type, | |
| 38 typeArray_type, | |
| 39 compiledICHolder_type, | |
| 40 number_object_types | |
| 41 } object_type; | |
| 42 | |
| 43 | |
| 44 // Classify objects by type and keep counts. | |
| 45 // Print the count and space taken for each type. | |
| 46 | |
| 47 | |
| 48 class ClassifyObjectClosure : public ObjectClosure { | |
| 49 private: | |
| 50 | |
| 51 static const char* object_type_name[number_object_types]; | |
| 52 | |
| 53 int total_object_count; | |
| 54 size_t total_object_size; | |
| 55 int object_count[number_object_types]; | |
| 56 size_t object_size[number_object_types]; | |
| 57 | |
| 58 public: | |
| 59 ClassifyObjectClosure() { reset(); } | |
| 60 void reset(); | |
| 61 void do_object(oop obj); | |
| 62 static object_type classify_object(oop obj, bool count); | |
| 63 size_t print(); | |
| 64 }; | |
| 65 | |
| 66 | |
| 67 // Count objects using the alloc_count field in the object's klass | |
| 68 // object. | |
| 69 | |
| 70 class ClassifyInstanceKlassClosure : public ClassifyObjectClosure { | |
| 71 private: | |
| 72 int total_instances; | |
| 73 public: | |
| 74 ClassifyInstanceKlassClosure() { reset(); } | |
| 75 void reset(); | |
| 76 void print(); | |
| 77 void do_object(oop obj); | |
| 78 }; | |
| 79 | |
| 80 | |
| 81 // Clear the alloc_count fields in all classes so that the count can be | |
| 82 // restarted. | |
| 83 | |
| 84 class ClearAllocCountClosure : public ObjectClosure { | |
| 85 public: | |
| 86 void do_object(oop obj) { | |
| 87 if (obj->is_klass()) { | |
| 88 Klass* k = Klass::cast((klassOop)obj); | |
| 89 k->set_alloc_count(0); | |
| 90 } | |
| 91 } | |
| 92 }; |