1 /* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2009 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "ci/ciInstance.hpp" 28 #include "ci/ciStreams.hpp" 29 #include "shark/sharkBuilder.hpp" 30 #include "shark/sharkConstant.hpp" 31 #include "shark/sharkValue.hpp" 32 33 using namespace llvm; 34 35 SharkConstant* SharkConstant::for_ldc(ciBytecodeStream *iter) { 36 ciConstant constant = iter->get_constant(); 37 ciType *type = NULL; 38 if (constant.basic_type() == T_OBJECT) { 39 ciEnv *env = ciEnv::current(); 40 if (constant.as_object()->is_klass()) 41 type = env->Class_klass(); 42 else 43 type = env->String_klass(); 44 } 45 return new SharkConstant(constant, type); 46 } 47 48 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) { 49 bool will_link; 50 ciField *field = iter->get_field(will_link); 51 assert(will_link, "typeflow responsibility"); 52 53 return new SharkConstant(field->constant_value(), field->type()); 54 } 55 56 SharkConstant::SharkConstant(ciConstant constant, ciType *type) { 57 SharkValue *value = NULL; 58 59 switch (constant.basic_type()) { 60 case T_BOOLEAN: 61 case T_BYTE: 62 case T_CHAR: 63 case T_SHORT: 64 case T_INT: 65 value = SharkValue::jint_constant(constant.as_int()); 66 break; 67 68 case T_LONG: 69 value = SharkValue::jlong_constant(constant.as_long()); 70 break; 71 72 case T_FLOAT: 73 value = SharkValue::jfloat_constant(constant.as_float()); 74 break; 75 76 case T_DOUBLE: 77 value = SharkValue::jdouble_constant(constant.as_double()); 78 break; 79 80 case T_OBJECT: 81 case T_ARRAY: 82 break; 83 84 case T_ILLEGAL: 85 // out of memory 86 _is_loaded = false; 87 return; 88 89 default: 90 tty->print_cr("Unhandled type %s", type2name(constant.basic_type())); 91 ShouldNotReachHere(); 92 } 93 94 // Handle primitive types. We create SharkValues for these 95 // now; doing so doesn't emit any code, and it allows us to 96 // delegate a bunch of stuff to the SharkValue code. 97 if (value) { 98 _value = value; 99 _is_loaded = true; 100 _is_nonzero = value->zero_checked(); 101 _is_two_word = value->is_two_word(); 102 return; 103 } 104 105 // Handle reference types. This is tricky because some 106 // ciObjects are psuedo-objects that refer to oops which 107 // have yet to be created. We need to spot the unloaded 108 // objects (which differ between ldc* and get*, thanks!) 109 ciObject *object = constant.as_object(); 110 assert(type != NULL, "shouldn't be"); 111 if (object->is_klass()) { 112 // The constant returned for a klass is the ciKlass 113 // for the entry, but we want the java_mirror. 114 ciKlass *klass = object->as_klass(); 115 if (!klass->is_loaded()) { 116 _is_loaded = false; 117 return; 118 } 119 object = klass->java_mirror(); 120 } 121 if (object->is_null_object() || !object->can_be_constant()) { 122 _is_loaded = false; 123 return; 124 } 125 126 _value = NULL; 127 _object = object; 128 _type = type; 129 _is_loaded = true; 130 _is_nonzero = true; 131 _is_two_word = false; 132 }