1 /* 2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 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 "precompiled.hpp" 26 #include "classfile/symbolTable.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "memory/oopFactory.hpp" 29 #include "memory/resourceArea.hpp" 30 #include "oops/oop.inline.hpp" 31 #include "oops/typeArrayKlass.hpp" 32 #include "runtime/fieldType.hpp" 33 #include "runtime/signature.hpp" 34 35 BasicType FieldType::basic_type(Symbol* signature) { 36 return char2type(signature->char_at(0)); 37 } 38 39 // Check if it is a valid array signature 40 bool FieldType::is_valid_array_signature(Symbol* sig) { 41 assert(sig->utf8_length() > 1, "this should already have been checked"); 42 assert(sig->char_at(0) == JVM_SIGNATURE_ARRAY, "this should already have been checked"); 43 // The first character is already checked 44 int i = 1; 45 int len = sig->utf8_length(); 46 // First skip all '['s 47 while(i < len - 1 && sig->char_at(i) == JVM_SIGNATURE_ARRAY) i++; 48 49 // Check type 50 switch(sig->char_at(i)) { 51 case JVM_SIGNATURE_BYTE: 52 case JVM_SIGNATURE_CHAR: 53 case JVM_SIGNATURE_DOUBLE: 54 case JVM_SIGNATURE_FLOAT: 55 case JVM_SIGNATURE_INT: 56 case JVM_SIGNATURE_LONG: 57 case JVM_SIGNATURE_SHORT: 58 case JVM_SIGNATURE_BOOLEAN: 59 // If it is an array, the type is the last character 60 return (i + 1 == len); 61 case JVM_SIGNATURE_CLASS: 62 // If it is an object, the last character must be a ';' 63 return sig->char_at(len - 1) == JVM_SIGNATURE_ENDCLASS; 64 } 65 66 return false; 67 } 68 69 70 BasicType FieldType::get_array_info(Symbol* signature, FieldArrayInfo& fd, TRAPS) { 71 assert(basic_type(signature) == T_ARRAY, "must be array"); 72 int index = 1; 73 int dim = 1; 74 while (signature->char_at(index) == JVM_SIGNATURE_ARRAY) { 75 index++; 76 dim++; 77 } 78 ResourceMark rm; 79 char *element = signature->as_C_string() + index; 80 BasicType element_type = char2type(element[0]); 81 if (element_type == T_OBJECT) { 82 int len = (int)strlen(element); 83 assert(element[len-1] == JVM_SIGNATURE_ENDCLASS, "last char should be a semicolon"); 84 element[len-1] = '\0'; // chop off semicolon 85 fd._object_key = SymbolTable::new_symbol(element + 1); 86 } 87 // Pass dimension back to caller 88 fd._dimension = dim; 89 return element_type; 90 }