Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/fieldType.hpp@248ff38d2950 (annotated)
src/share/vm/runtime/fieldType.hpp
Fri, 28 Mar 2014 10:13:37 -0700
- author
- vlivanov
- date
- Fri, 28 Mar 2014 10:13:37 -0700
- changeset 6528
- 248ff38d2950
- parent 2708
- 1d1603768966
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8035828: Turn on @Stable support in VM
Reviewed-by: jrose, twisti
| duke@435 | 1 | /* |
| trims@2708 | 2 | * Copyright (c) 1997, 2011, 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_RUNTIME_FIELDTYPE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_RUNTIME_FIELDTYPE_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "memory/allocation.hpp" |
| coleenp@2497 | 29 | #include "oops/symbol.hpp" |
| stefank@2314 | 30 | |
| duke@435 | 31 | // Note: FieldType should be based on the SignatureIterator (or vice versa). |
| duke@435 | 32 | // In any case, this structure should be re-thought at some point. |
| duke@435 | 33 | |
| duke@435 | 34 | // A FieldType is used to determine the type of a field from a signature string. |
| duke@435 | 35 | |
| coleenp@2497 | 36 | // Information returned by get_array_info, which is scoped to decrement |
| coleenp@2497 | 37 | // reference count if a Symbol is created in the case of T_OBJECT |
| coleenp@2497 | 38 | class FieldArrayInfo : public StackObj { |
| coleenp@2497 | 39 | friend class FieldType; // field type can set these fields. |
| coleenp@2497 | 40 | int _dimension; |
| coleenp@2497 | 41 | Symbol* _object_key; |
| coleenp@2497 | 42 | public: |
| coleenp@2497 | 43 | int dimension() { return _dimension; } |
| coleenp@2497 | 44 | Symbol* object_key() { return _object_key; } |
| coleenp@2497 | 45 | // basic constructor |
| coleenp@2497 | 46 | FieldArrayInfo() : _dimension(0), _object_key(NULL) {} |
| coleenp@2497 | 47 | // destructor decrements object key's refcount if created |
| coleenp@2497 | 48 | ~FieldArrayInfo() { if (_object_key != NULL) _object_key->decrement_refcount(); } |
| coleenp@2497 | 49 | }; |
| coleenp@2497 | 50 | |
| coleenp@2497 | 51 | |
| duke@435 | 52 | class FieldType: public AllStatic { |
| duke@435 | 53 | private: |
| coleenp@2497 | 54 | static void skip_optional_size(Symbol* signature, int* index); |
| coleenp@2497 | 55 | static bool is_valid_array_signature(Symbol* signature); |
| duke@435 | 56 | public: |
| duke@435 | 57 | |
| duke@435 | 58 | // Return basic type |
| coleenp@2497 | 59 | static BasicType basic_type(Symbol* signature); |
| duke@435 | 60 | |
| duke@435 | 61 | // Testing |
| coleenp@2497 | 62 | static bool is_array(Symbol* signature) { return signature->utf8_length() > 1 && signature->byte_at(0) == '[' && is_valid_array_signature(signature); } |
| duke@435 | 63 | |
| coleenp@2497 | 64 | static bool is_obj(Symbol* signature) { |
| duke@435 | 65 | int sig_length = signature->utf8_length(); |
| duke@435 | 66 | // Must start with 'L' and end with ';' |
| duke@435 | 67 | return (sig_length >= 2 && |
| duke@435 | 68 | (signature->byte_at(0) == 'L') && |
| duke@435 | 69 | (signature->byte_at(sig_length - 1) == ';')); |
| duke@435 | 70 | } |
| duke@435 | 71 | |
| duke@435 | 72 | // Parse field and extract array information. Works for T_ARRAY only. |
| coleenp@2497 | 73 | static BasicType get_array_info(Symbol* signature, FieldArrayInfo& ai, TRAPS); |
| duke@435 | 74 | }; |
| stefank@2314 | 75 | |
| stefank@2314 | 76 | #endif // SHARE_VM_RUNTIME_FIELDTYPE_HPP |
