Tue, 15 Nov 2011 20:17:33 +0100
7110152: assert(size_in_words <= (julong)max_jint) failed: no overflow
Summary: Reduce what arrayOopDesc::max_array_length() returns to avoid int overflow
Reviewed-by: kvn, dholmes, tonyp
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_OOPS_TYPEARRAYKLASS_HPP |
stefank@2314 | 26 | #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "oops/arrayKlass.hpp" |
stefank@2314 | 29 | |
duke@435 | 30 | // A typeArrayKlass is the klass of a typeArray |
duke@435 | 31 | // It contains the type and size of the elements |
duke@435 | 32 | |
duke@435 | 33 | class typeArrayKlass : public arrayKlass { |
duke@435 | 34 | friend class VMStructs; |
duke@435 | 35 | private: |
duke@435 | 36 | jint _max_length; // maximum number of elements allowed in an array |
duke@435 | 37 | public: |
duke@435 | 38 | // instance variables |
duke@435 | 39 | jint max_length() { return _max_length; } |
duke@435 | 40 | void set_max_length(jint m) { _max_length = m; } |
duke@435 | 41 | |
duke@435 | 42 | // testers |
duke@435 | 43 | bool oop_is_typeArray_slow() const { return true; } |
duke@435 | 44 | |
duke@435 | 45 | // klass allocation |
duke@435 | 46 | DEFINE_ALLOCATE_PERMANENT(typeArrayKlass); |
jcoomes@916 | 47 | static klassOop create_klass(BasicType type, int scale, const char* name_str, |
jcoomes@916 | 48 | TRAPS); |
jcoomes@916 | 49 | static inline klassOop create_klass(BasicType type, int scale, TRAPS) { |
jcoomes@916 | 50 | return create_klass(type, scale, external_name(type), CHECK_NULL); |
jcoomes@916 | 51 | } |
duke@435 | 52 | |
duke@435 | 53 | int oop_size(oop obj) const; |
duke@435 | 54 | int klass_oop_size() const { return object_size(); } |
duke@435 | 55 | |
duke@435 | 56 | bool compute_is_subtype_of(klassOop k); |
duke@435 | 57 | |
duke@435 | 58 | // Allocation |
kvn@3157 | 59 | typeArrayOop allocate_common(int length, bool do_zero, TRAPS); |
kvn@3157 | 60 | typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } |
duke@435 | 61 | typeArrayOop allocate_permanent(int length, TRAPS); // used for class file structures |
duke@435 | 62 | oop multi_allocate(int rank, jint* sizes, TRAPS); |
duke@435 | 63 | |
duke@435 | 64 | // Copying |
duke@435 | 65 | void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); |
duke@435 | 66 | |
duke@435 | 67 | // Iteration |
duke@435 | 68 | int oop_oop_iterate(oop obj, OopClosure* blk); |
duke@435 | 69 | int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr); |
duke@435 | 70 | |
duke@435 | 71 | // Garbage collection |
duke@435 | 72 | void oop_follow_contents(oop obj); |
duke@435 | 73 | int oop_adjust_pointers(oop obj); |
duke@435 | 74 | |
duke@435 | 75 | // Parallel Scavenge and Parallel Old |
duke@435 | 76 | PARALLEL_GC_DECLS |
duke@435 | 77 | |
duke@435 | 78 | protected: |
duke@435 | 79 | // Find n'th dimensional array |
duke@435 | 80 | virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); |
duke@435 | 81 | |
duke@435 | 82 | // Returns the array class with this class as element type |
duke@435 | 83 | virtual klassOop array_klass_impl(bool or_null, TRAPS); |
duke@435 | 84 | |
duke@435 | 85 | public: |
duke@435 | 86 | // Casting from klassOop |
duke@435 | 87 | static typeArrayKlass* cast(klassOop k) { |
duke@435 | 88 | assert(k->klass_part()->oop_is_typeArray_slow(), "cast to typeArrayKlass"); |
duke@435 | 89 | return (typeArrayKlass*) k->klass_part(); |
duke@435 | 90 | } |
duke@435 | 91 | |
duke@435 | 92 | // Naming |
duke@435 | 93 | static const char* external_name(BasicType type); |
duke@435 | 94 | |
duke@435 | 95 | // Sizing |
duke@435 | 96 | static int header_size() { return oopDesc::header_size() + sizeof(typeArrayKlass)/HeapWordSize; } |
duke@435 | 97 | int object_size() const { return arrayKlass::object_size(header_size()); } |
duke@435 | 98 | |
duke@435 | 99 | // Initialization (virtual from Klass) |
duke@435 | 100 | void initialize(TRAPS); |
duke@435 | 101 | |
duke@435 | 102 | private: |
duke@435 | 103 | // Helpers |
duke@435 | 104 | static klassOop array_klass_impl(typeArrayKlassHandle h_this, bool or_null, int n, TRAPS); |
duke@435 | 105 | |
duke@435 | 106 | #ifndef PRODUCT |
duke@435 | 107 | public: |
duke@435 | 108 | // Printing |
duke@435 | 109 | void oop_print_on(oop obj, outputStream* st); |
duke@435 | 110 | #endif |
duke@435 | 111 | public: |
duke@435 | 112 | const char* internal_name() const; |
duke@435 | 113 | }; |
stefank@2314 | 114 | |
stefank@2314 | 115 | #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP |