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 #include "ci/ciField.hpp" 26 #include "ci/ciValueKlass.hpp" 27 #include "oops/valueKlass.hpp" 28 29 int ciValueKlass::get_field_index_by_offset(int offset) { 30 // TODO do we need handles here? 31 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 32 methodHandle factory_h(vklass_h->factory_method()); 33 // Search field with field_offset and return factory parameter index 34 for (int index = 0; index < field_count(); ++index) { 35 if (get_field_offset_by_index(index) == offset) { 36 return index; 37 } 38 } 39 ShouldNotReachHere(); 40 return -1; 41 } 42 43 int ciValueKlass::get_field_offset_by_index(int index) const { 44 // Compute the field index from the factory parameter index 45 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 46 methodHandle factory_h(vklass_h->factory_method()); 47 int field_index = factory_h->constMethod()->valuefactory_parameter_mapping_start()[index].data.field_index; 48 // Get the field offset 49 return vklass_h->field_offset(field_index); 50 } 51 52 BasicType ciValueKlass::get_field_type_by_index(int index) const { 53 // Compute the field index from the factory parameter index 54 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 55 methodHandle factory_h(vklass_h->factory_method()); 56 int field_index = factory_h->constMethod()->valuefactory_parameter_mapping_start()[index].data.field_index; 57 // Get the basic type of the field 58 Symbol* signature = vklass_h->field_signature(field_index); 59 return vmSymbols::signature_type(signature); 60 } | 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 #include "ci/ciField.hpp" 26 #include "ci/ciValueKlass.hpp" 27 #include "oops/valueKlass.hpp" 28 29 // Number of value type factory parameters 30 int ciValueKlass::param_count() const { 31 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 32 methodHandle factory_h(vklass_h->factory_method()); 33 return factory_h->constMethod()->valuefactory_parameter_mapping_length(); 34 } 35 36 // Size of value type factory parameters in words 37 int ciValueKlass::param_size() { 38 int size = 0; 39 for (int i = 0; i < param_count(); ++i) { 40 size += get_field_type_by_index(i)->size(); 41 } 42 return size; 43 } 44 45 // Returns the value factory parameter index of the field with the given offset. 46 // If the field at 'offset' belongs to a flattened value type field, return the 47 // index of the ValueType parameter corresponding to this flattened value type. 48 int ciValueKlass::get_field_index_by_offset(int offset) { 49 assert(contains_field_offset(offset), "invalid field offset"); 50 int best_offset = 0; 51 int best_index = -1; 52 // Search the field with the given offset 53 for (int i = 0; i < param_count(); ++i) { 54 int field_offset = get_field_offset_by_index(i); 55 if (field_offset == offset) { 56 // Exact match 57 return i; 58 } else if (field_offset < offset && field_offset > best_offset) { 59 // No exact match. Save the index of the field with the closest offset that 60 // is smaller than the given field offset. This index corresponds to the 61 // flattened value type field that holds the field we are looking for. 62 best_offset = field_offset; 63 best_index = i; 64 } 65 } 66 assert(best_index >= 0, "field not found"); 67 assert(best_offset == offset || get_field_type_by_index(best_index)->is_valuetype(), "offset should match for non-VTs"); 68 return best_index; 69 } 70 71 // Returns the field offset of the value factory parameter with the given index 72 int ciValueKlass::get_field_offset_by_index(int index) const { 73 // Compute the field index from the factory parameter index 74 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 75 methodHandle factory_h(vklass_h->factory_method()); 76 int field_index = factory_h->constMethod()->valuefactory_parameter_mapping_start()[index].data.field_index; 77 // Get the field offset 78 return vklass_h->field_offset(field_index); 79 } 80 81 // Returns the field type of the value factory parameter with the given index 82 ciType* ciValueKlass::get_field_type_by_index(int index) { 83 int offset = get_field_offset_by_index(index); 84 VM_ENTRY_MARK; 85 return get_field_type_by_offset(offset); 86 } 87 88 // Offset of the first field in the value type 89 int ciValueKlass::get_first_field_offset() const { 90 valueKlassHandle vklass_h(ValueKlass::cast(get_Klass())); 91 return vklass_h()->first_field_offset(); 92 } |