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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_RUNTIME_FIELDTYPE_HPP
26 #define SHARE_RUNTIME_FIELDTYPE_HPP
27
28 #include "memory/allocation.hpp"
29 #include "oops/symbol.hpp"
30
31 // Note: FieldType should be based on the SignatureIterator (or vice versa).
32 // In any case, this structure should be re-thought at some point.
33
34 // A FieldType is used to determine the type of a field from a signature string.
35
36 // Information returned by get_array_info, which is scoped to decrement
37 // reference count if a Symbol is created in the case of T_OBJECT
38 class FieldArrayInfo : public StackObj {
39 friend class FieldType; // field type can set these fields.
40 int _dimension;
41 Symbol* _object_key;
42 public:
43 int dimension() { return _dimension; }
44 Symbol* object_key() { return _object_key; }
45 // basic constructor
46 FieldArrayInfo() : _dimension(0), _object_key(NULL) {}
47 // destructor decrements object key's refcount if created
48 ~FieldArrayInfo() { if (_object_key != NULL) _object_key->decrement_refcount(); }
49 };
50
51
52 class FieldType: public AllStatic {
53 private:
54 static bool is_valid_array_signature(Symbol* signature);
55 public:
56
57 // Return basic type
58 static BasicType basic_type(Symbol* signature);
59
60 // Testing
61 static bool is_array(Symbol* signature) { return signature->utf8_length() > 1 && signature->char_at(0) == '[' && is_valid_array_signature(signature); }
62
63 static bool is_obj(Symbol* signature) {
64 int sig_length = signature->utf8_length();
65 // Must start with 'L' and end with ';'
66 return (sig_length >= 2 &&
67 (signature->char_at(0) == 'L') &&
68 (signature->char_at(sig_length - 1) == ';'));
69 }
70
71 static bool is_valuetype(Symbol* signature) {
72 return signature->is_Q_signature();
73 }
74
75 // Parse field and extract array information. Works for T_ARRAY only.
76 static BasicType get_array_info(Symbol* signature, FieldArrayInfo& ai, TRAPS);
77 };
78
79 #endif // SHARE_RUNTIME_FIELDTYPE_HPP
|
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_RUNTIME_FIELDTYPE_HPP
26 #define SHARE_RUNTIME_FIELDTYPE_HPP
27
28 #include "memory/allocation.hpp"
29 #include "oops/arrayStorageProperties.hpp"
30 #include "oops/symbol.hpp"
31
32 // Note: FieldType should be based on the SignatureIterator (or vice versa).
33 // In any case, this structure should be re-thought at some point.
34
35 // A FieldType is used to determine the type of a field from a signature string.
36
37 // Information returned by get_array_info, which is scoped to decrement
38 // reference count if a Symbol is created in the case of T_OBJECT
39 class FieldArrayInfo : public StackObj {
40 friend class FieldType; // field type can set these fields.
41 int _dimension;
42 Symbol* _object_key;
43 ArrayStorageProperties _storage_props;
44 public:
45 int dimension() { return _dimension; }
46 Symbol* object_key() { return _object_key; }
47 ArrayStorageProperties storage_props() { return _storage_props; }
48 // basic constructor
49 FieldArrayInfo() : _dimension(0), _object_key(NULL), _storage_props(ArrayStorageProperties::empty) {}
50 // destructor decrements object key's refcount if created
51 ~FieldArrayInfo() { if (_object_key != NULL) _object_key->decrement_refcount(); }
52 };
53
54
55 class FieldType: public AllStatic {
56 private:
57 static bool is_valid_array_signature(Symbol* signature);
58 public:
59
60 // Return basic type
61 static BasicType basic_type(Symbol* signature);
62
63 // Testing
64 static bool is_array(Symbol* signature) { return signature->utf8_length() > 1 && signature->char_at(0) == '[' && is_valid_array_signature(signature); }
65
66 static bool is_obj(Symbol* signature) {
67 int sig_length = signature->utf8_length();
68 // Must start with 'L' and end with ';'
69 return (sig_length >= 2 &&
70 (signature->char_at(0) == 'L') &&
71 (signature->char_at(sig_length - 1) == ';'));
72 }
73
74 static bool is_valuetype(Symbol* signature) {
75 return signature->is_Q_signature();
76 }
77
78 // Parse field and extract array information. Works for T_ARRAY only.
79 static BasicType get_array_info(Symbol* signature, FieldArrayInfo& ai, TRAPS);
80
81 // LWorld (LW2) Q-type array descriptors require null-free, and preferably flat if possible
82 static ArrayStorageProperties get_array_storage_properties(Symbol* signature);
83 };
84
85 #endif // SHARE_RUNTIME_FIELDTYPE_HPP
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