1 /* 2 * Copyright (c) 1999, 2010, 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 "ci/ciSignature.hpp" 27 #include "ci/ciUtilities.hpp" 28 #include "memory/allocation.inline.hpp" 29 #include "oops/oop.inline.hpp" 30 #include "runtime/signature.hpp" 31 32 // ciSignature 33 // 34 // This class represents the signature of a method. 35 36 // ------------------------------------------------------------------ 37 // ciSignature::ciSignature 38 ciSignature::ciSignature(ciKlass* accessing_klass, ciSymbol* symbol) { 39 ASSERT_IN_VM; 40 EXCEPTION_CONTEXT; 41 _accessing_klass = accessing_klass; 42 _symbol = symbol; 43 44 ciEnv* env = CURRENT_ENV; 45 Arena* arena = env->arena(); 46 _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL); 47 48 int size = 0; 49 int count = 0; 50 symbolHandle sh (THREAD, symbol->get_symbolOop()); 51 SignatureStream ss(sh); 52 for (; ; ss.next()) { 53 // Process one element of the signature 54 ciType* type; 55 if (!ss.is_object()) { 56 type = ciType::make(ss.type()); 57 } else { 58 symbolOop name = ss.as_symbol(THREAD); 59 if (HAS_PENDING_EXCEPTION) { 60 type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass() 61 : (ciType*)ciEnv::unloaded_ciinstance_klass(); 62 env->record_out_of_memory_failure(); 63 CLEAR_PENDING_EXCEPTION; 64 } else { 65 ciSymbol* klass_name = env->get_object(name)->as_symbol(); 66 type = env->get_klass_by_name_impl(_accessing_klass, klass_name, false); 67 } 68 } 69 _types->append(type); 70 if (ss.at_return_type()) { 71 // Done processing the return type; do not add it into the count. 72 break; 73 } 74 size += type->size(); 75 count++; 76 } 77 _size = size; 78 _count = count; 79 } 80 81 // ------------------------------------------------------------------ 82 // ciSignature::return_ciType 83 // 84 // What is the return type of this signature? 85 ciType* ciSignature::return_type() const { 86 return _types->at(_count); 87 } 88 89 // ------------------------------------------------------------------ 90 // ciSignature::ciType_at 91 // 92 // What is the type of the index'th element of this 93 // signature? 94 ciType* ciSignature::type_at(int index) const { 95 assert(index < _count, "out of bounds"); 96 // The first _klasses element holds the return klass. 97 return _types->at(index); 98 } 99 100 // ------------------------------------------------------------------ 101 // ciSignature::print_signature 102 void ciSignature::print_signature() { 103 _symbol->print_symbol(); 104 } 105 106 // ------------------------------------------------------------------ 107 // ciSignature::print 108 void ciSignature::print() { 109 tty->print("<ciSignature symbol="); 110 print_signature(); 111 tty->print(" accessing_klass="); 112 _accessing_klass->print(); 113 tty->print(" address=0x%x>", (address)this); 114 }