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 assert(constant.as_object()->klass() == env->String_klass() || constant.as_object()->klass() == env->Class_klass(), "should be"); 41 type = constant.as_object()->klass(); 42 } 43 return new SharkConstant(constant, type); 44 } 45 46 SharkConstant* SharkConstant::for_field(ciBytecodeStream *iter) { 47 bool will_link; 48 ciField *field = iter->get_field(will_link); 49 assert(will_link, "typeflow responsibility"); 50 51 return new SharkConstant(field->constant_value(), field->type()); 52 } 53 54 SharkConstant::SharkConstant(ciConstant constant, ciType *type) { 55 SharkValue *value = NULL; 56 57 switch (constant.basic_type()) { 58 case T_BOOLEAN: 59 case T_BYTE: 60 case T_CHAR: 61 case T_SHORT: 62 case T_INT: 63 value = SharkValue::jint_constant(constant.as_int()); 64 break; 65 66 case T_LONG: 67 value = SharkValue::jlong_constant(constant.as_long()); 68 break; 69 70 case T_FLOAT: 71 value = SharkValue::jfloat_constant(constant.as_float()); 72 break; 73 74 case T_DOUBLE: 75 value = SharkValue::jdouble_constant(constant.as_double()); 76 break; 77 78 case T_OBJECT: 79 case T_ARRAY: 80 break; 81 82 case T_ILLEGAL: 83 // out of memory 84 _is_loaded = false; 85 return; 86 87 default: 88 tty->print_cr("Unhandled type %s", type2name(constant.basic_type())); 89 ShouldNotReachHere(); 90 } 91 92 // Handle primitive types. We create SharkValues for these 93 // now; doing so doesn't emit any code, and it allows us to 94 // delegate a bunch of stuff to the SharkValue code. 95 if (value) { 96 _value = value; 97 _is_loaded = true; 98 _is_nonzero = value->zero_checked(); 99 _is_two_word = value->is_two_word(); 100 return; 101 } 102 103 // Handle reference types. This is tricky because some 104 // ciObjects are psuedo-objects that refer to oops which 105 // have yet to be created. We need to spot the unloaded 106 // objects (which differ between ldc* and get*, thanks!) 107 ciObject *object = constant.as_object(); 108 assert(type != NULL, "shouldn't be"); 109 110 if ((! object->is_null_object()) && object->klass() == ciEnv::current()->Class_klass()) { 111 ciKlass *klass = object->klass(); 112 if (! klass->is_loaded()) { 113 _is_loaded = false; 114 return; 115 } 116 } 117 118 if (object->is_null_object() || ! object->can_be_constant() || ! object->is_loaded()) { 119 _is_loaded = false; 120 return; 121 } 122 123 _value = NULL; 124 _object = object; 125 _type = type; 126 _is_loaded = true; 127 _is_nonzero = true; 128 _is_two_word = false; 129 }