Mercurial > hg > truffle
annotate src/share/vm/oops/instanceRefKlass.hpp @ 2021:7cf1a74771e8
6988439: Parallel Class Loading test deadlock involving MethodData_lock and Pending List Lock
Summary: Don't acquire methodData_lock while holding pending list lock
Reviewed-by: kvn, never, ysr
| author | coleenp |
|---|---|
| date | Fri, 10 Dec 2010 12:13:03 -0500 |
| parents | f95d63e2154a |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 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 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |
| 26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP | |
| 27 | |
| 28 #include "oops/instanceKlass.hpp" | |
| 29 | |
| 0 | 30 // An instanceRefKlass is a specialized instanceKlass for Java |
| 31 // classes that are subclasses of java/lang/ref/Reference. | |
| 32 // | |
| 33 // These classes are used to implement soft/weak/final/phantom | |
| 34 // references and finalization, and need special treatment by the | |
| 35 // garbage collector. | |
| 36 // | |
| 37 // During GC discovered reference objects are added (chained) to one | |
| 38 // of the four lists below, depending on the type of reference. | |
| 39 // The linked occurs through the next field in class java/lang/ref/Reference. | |
| 40 // | |
| 41 // Afterwards, the discovered references are processed in decreasing | |
| 42 // order of reachability. Reference objects eligible for notification | |
| 43 // are linked to the static pending_list in class java/lang/ref/Reference, | |
| 44 // and the pending list lock object in the same class is notified. | |
| 45 | |
| 46 | |
| 47 class instanceRefKlass: public instanceKlass { | |
| 48 public: | |
| 49 // Type testing | |
| 50 bool oop_is_instanceRef() const { return true; } | |
| 51 | |
| 52 // Casting from klassOop | |
| 53 static instanceRefKlass* cast(klassOop k) { | |
| 54 assert(k->klass_part()->oop_is_instanceRef(), "cast to instanceRefKlass"); | |
| 55 return (instanceRefKlass*) k->klass_part(); | |
| 56 } | |
| 57 | |
| 58 // allocation | |
| 59 DEFINE_ALLOCATE_PERMANENT(instanceRefKlass); | |
| 60 | |
| 61 // Garbage collection | |
| 62 int oop_adjust_pointers(oop obj); | |
| 63 void oop_follow_contents(oop obj); | |
| 64 | |
| 65 // Parallel Scavenge and Parallel Old | |
| 66 PARALLEL_GC_DECLS | |
| 67 | |
| 68 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 69 return oop_oop_iterate_v(obj, blk); | |
| 70 } | |
| 71 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 72 return oop_oop_iterate_v_m(obj, blk, mr); | |
| 73 } | |
| 74 | |
| 75 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
| 76 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ | |
| 77 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr); | |
| 78 | |
| 79 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL) | |
| 342 | 80 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL) |
| 81 | |
| 82 #ifndef SERIALGC | |
| 83 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ | |
| 84 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); | |
| 85 | |
| 86 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) | |
| 87 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) | |
| 88 #endif // !SERIALGC | |
| 0 | 89 |
| 90 static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock); | |
| 91 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock); | |
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6988439: Parallel Class Loading test deadlock involving MethodData_lock and Pending List Lock
coleenp
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92 static bool owns_pending_list_lock(JavaThread* thread); |
| 0 | 93 |
| 94 // Update non-static oop maps so 'referent', 'nextPending' and | |
| 95 // 'discovered' will look like non-oops | |
| 96 static void update_nonstatic_oop_maps(klassOop k); | |
| 97 | |
| 98 public: | |
| 99 // Verification | |
| 100 void oop_verify_on(oop obj, outputStream* st); | |
| 101 }; | |
| 1972 | 102 |
| 103 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP |