Mercurial > hg > graal-compiler
view src/share/vm/oops/arrayKlass.hpp @ 7172:bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
Summary: Fixed potential buffer overrun when giving empty option to NativeMemoryTracking commandline option
Reviewed-by: ctornqvi, hseigel, kvn
author | zgu |
---|---|
date | Wed, 28 Nov 2012 09:19:38 -0500 |
parents | d8ce2825b193 |
children | 16fb9f942703 |
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/* * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_OOPS_ARRAYKLASS_HPP #define SHARE_VM_OOPS_ARRAYKLASS_HPP #include "memory/universe.hpp" #include "oops/klass.hpp" class klassVtable; // ArrayKlass is the abstract baseclass for all array classes class ArrayKlass: public Klass { friend class VMStructs; private: int _dimension; // This is n'th-dimensional array. Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present). Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present). int _vtable_len; // size of vtable for this klass juint _alloc_size; // allocation profiling support oop _component_mirror; // component type, as a java/lang/Class protected: // Constructors // The constructor with the Symbol argument does the real array // initialization, the other is a dummy ArrayKlass(Symbol* name); ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); } public: // Testing operation bool oop_is_array_slow() const { return true; } // Instance variables int dimension() const { return _dimension; } void set_dimension(int dimension) { _dimension = dimension; } Klass* higher_dimension() const { return _higher_dimension; } void set_higher_dimension(Klass* k) { _higher_dimension = k; } Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;} Klass* lower_dimension() const { return _lower_dimension; } void set_lower_dimension(Klass* k) { _lower_dimension = k; } Klass** adr_lower_dimension() { return (Klass**)&this->_lower_dimension;} // Allocation profiling support juint alloc_size() const { return _alloc_size; } void set_alloc_size(juint n) { _alloc_size = n; } // offset of first element, including any padding for the sake of alignment int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); } int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); } // type of elements (T_OBJECT for both oop arrays and array-arrays) BasicType element_type() const { return layout_helper_element_type(layout_helper()); } oop component_mirror() const { return _component_mirror; } void set_component_mirror(oop m) { klass_oop_store(&_component_mirror, m); } oop* adr_component_mirror() { return (oop*)&this->_component_mirror;} // Compiler/Interpreter offset static ByteSize component_mirror_offset() { return in_ByteSize(offset_of(ArrayKlass, _component_mirror)); } virtual Klass* java_super() const;//{ return SystemDictionary::Object_klass(); } // Allocation // Sizes points to the first dimension of the array, subsequent dimensions // are always in higher memory. The callers of these set that up. virtual oop multi_allocate(int rank, jint* sizes, TRAPS); objArrayOop allocate_arrayArray(int n, int length, TRAPS); // Lookup operations Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; // Casting from Klass* static ArrayKlass* cast(Klass* k) { assert(k->oop_is_array(), "cast to ArrayKlass"); return (ArrayKlass*) k; } GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); bool compute_is_subtype_of(Klass* k); // Sizing static int header_size() { return sizeof(ArrayKlass)/HeapWordSize; } static int static_size(int header_size); // Java vtable klassVtable* vtable() const; // return new klassVtable int vtable_length() const { return _vtable_len; } static int base_vtable_length() { return Universe::base_vtable_size(); } void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; } protected: inline intptr_t* start_of_vtable() const; public: // Iterators void array_klasses_do(void f(Klass* k)); void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); void with_array_klasses_do(void f(Klass* k)); // GC support virtual void oops_do(OopClosure* cl); // Return a handle. static void complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS); // jvm support jint compute_modifier_flags(TRAPS) const; // JVMTI support jint jvmti_class_status() const; // CDS support - remove and restore oops from metadata. Oops are not shared. virtual void remove_unshareable_info(); virtual void restore_unshareable_info(TRAPS); // Printing void print_on(outputStream* st) const; void print_value_on(outputStream* st) const; void oop_print_on(oop obj, outputStream* st); // Verification void verify_on(outputStream* st); void oop_verify_on(oop obj, outputStream* st); }; #endif // SHARE_VM_OOPS_ARRAYKLASS_HPP