Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciObject.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | 06f017f7daa7 01fd6090fdd8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "ci/ciObject.hpp" | |
| 27 #include "ci/ciUtilities.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "oops/oop.inline2.hpp" | |
| 0 | 30 |
| 31 // ciObject | |
| 32 // | |
| 33 // This class represents an oop in the HotSpot virtual machine. | |
| 34 // Its subclasses are structured in a hierarchy which mirrors | |
| 35 // an aggregate of the VM's oop and klass hierarchies (see | |
| 36 // oopHierarchy.hpp). Each instance of ciObject holds a handle | |
| 37 // to a corresponding oop on the VM side and provides routines | |
| 38 // for accessing the information in its oop. By using the ciObject | |
| 39 // hierarchy for accessing oops in the VM, the compiler ensures | |
| 40 // that it is safe with respect to garbage collection; that is, | |
| 41 // GC and compilation can proceed independently without | |
| 42 // interference. | |
| 43 // | |
| 44 // Within the VM, the oop and klass hierarchies are separate. | |
| 45 // The compiler interface does not preserve this separation -- | |
| 46 // the distinction between `klassOop' and `Klass' are not | |
| 47 // reflected in the interface and instead the Klass hierarchy | |
| 48 // is directly modeled as the subclasses of ciKlass. | |
| 49 | |
| 50 // ------------------------------------------------------------------ | |
| 51 // ciObject::ciObject | |
| 52 ciObject::ciObject(oop o) { | |
| 53 ASSERT_IN_VM; | |
| 54 if (ciObjectFactory::is_initialized()) { | |
| 55 _handle = JNIHandles::make_local(o); | |
| 56 } else { | |
| 57 _handle = JNIHandles::make_global(o); | |
| 58 } | |
| 59 _klass = NULL; | |
| 60 _ident = 0; | |
| 989 | 61 init_flags_from(o); |
| 0 | 62 } |
| 63 | |
| 64 // ------------------------------------------------------------------ | |
| 65 // ciObject::ciObject | |
| 66 // | |
| 67 ciObject::ciObject(Handle h) { | |
| 68 ASSERT_IN_VM; | |
| 69 if (ciObjectFactory::is_initialized()) { | |
| 70 _handle = JNIHandles::make_local(h()); | |
| 71 } else { | |
| 72 _handle = JNIHandles::make_global(h); | |
| 73 } | |
| 74 _klass = NULL; | |
| 75 _ident = 0; | |
| 989 | 76 init_flags_from(h()); |
| 0 | 77 } |
| 78 | |
| 79 // ------------------------------------------------------------------ | |
| 80 // ciObject::ciObject | |
| 81 // | |
| 82 // Unloaded klass/method variant. `klass' is the klass of the unloaded | |
| 83 // klass/method, if that makes sense. | |
| 84 ciObject::ciObject(ciKlass* klass) { | |
| 85 ASSERT_IN_VM; | |
| 86 assert(klass != NULL, "must supply klass"); | |
| 87 _handle = NULL; | |
| 88 _klass = klass; | |
| 89 _ident = 0; | |
| 90 } | |
| 91 | |
| 92 // ------------------------------------------------------------------ | |
| 93 // ciObject::ciObject | |
| 94 // | |
| 95 // NULL variant. Used only by ciNullObject. | |
| 96 ciObject::ciObject() { | |
| 97 ASSERT_IN_VM; | |
| 98 _handle = NULL; | |
| 99 _klass = NULL; | |
| 100 _ident = 0; | |
| 101 } | |
| 102 | |
| 103 // ------------------------------------------------------------------ | |
| 104 // ciObject::klass | |
| 105 // | |
| 106 // Get the ciKlass of this ciObject. | |
| 107 ciKlass* ciObject::klass() { | |
| 108 if (_klass == NULL) { | |
| 109 if (_handle == NULL) { | |
| 110 // When both _klass and _handle are NULL, we are dealing | |
| 111 // with the distinguished instance of ciNullObject. | |
| 112 // No one should ask it for its klass. | |
| 113 assert(is_null_object(), "must be null object"); | |
| 114 ShouldNotReachHere(); | |
| 115 return NULL; | |
| 116 } | |
| 117 | |
| 118 GUARDED_VM_ENTRY( | |
| 119 oop o = get_oop(); | |
| 120 _klass = CURRENT_ENV->get_object(o->klass())->as_klass(); | |
| 121 ); | |
| 122 } | |
| 123 return _klass; | |
| 124 } | |
| 125 | |
| 126 // ------------------------------------------------------------------ | |
| 127 // ciObject::set_ident | |
| 128 // | |
| 129 // Set the unique identity number of a ciObject. | |
| 130 void ciObject::set_ident(uint id) { | |
| 131 assert((_ident >> FLAG_BITS) == 0, "must only initialize once"); | |
| 132 assert( id < ((uint)1 << (BitsPerInt-FLAG_BITS)), "id too big"); | |
| 133 _ident = _ident + (id << FLAG_BITS); | |
| 134 } | |
| 135 | |
| 136 // ------------------------------------------------------------------ | |
| 137 // ciObject::ident | |
| 138 // | |
| 139 // Report the unique identity number of a ciObject. | |
| 140 uint ciObject::ident() { | |
| 141 uint id = _ident >> FLAG_BITS; | |
| 142 assert(id != 0, "must be initialized"); | |
| 143 return id; | |
| 144 } | |
| 145 | |
| 146 // ------------------------------------------------------------------ | |
| 147 // ciObject::equals | |
| 148 // | |
| 149 // Are two ciObjects equal? | |
| 150 bool ciObject::equals(ciObject* obj) { | |
| 151 return (this == obj); | |
| 152 } | |
| 153 | |
| 154 // ------------------------------------------------------------------ | |
| 155 // ciObject::hash | |
| 156 // | |
| 157 // A hash value for the convenience of compilers. | |
| 158 // | |
| 159 // Implementation note: we use the address of the ciObject as the | |
| 160 // basis for the hash. Use the _ident field, which is well-behaved. | |
| 161 int ciObject::hash() { | |
| 162 return ident() * 31; | |
| 163 } | |
| 164 | |
| 165 // ------------------------------------------------------------------ | |
| 989 | 166 // ciObject::constant_encoding |
| 0 | 167 // |
| 168 // The address which the compiler should embed into the | |
| 169 // generated code to represent this oop. This address | |
| 170 // is not the true address of the oop -- it will get patched | |
| 171 // during nmethod creation. | |
| 172 // | |
| 173 // | |
| 174 // | |
| 175 // Implementation note: we use the handle as the encoding. The | |
| 176 // nmethod constructor resolves the handle and patches in the oop. | |
| 177 // | |
| 178 // This method should be changed to return an generified address | |
| 179 // to discourage use of the JNI handle. | |
| 989 | 180 jobject ciObject::constant_encoding() { |
| 0 | 181 assert(is_null_object() || handle() != NULL, "cannot embed null pointer"); |
| 989 | 182 assert(can_be_constant(), "oop must be NULL or perm"); |
| 0 | 183 return handle(); |
| 184 } | |
| 185 | |
| 186 // ------------------------------------------------------------------ | |
| 989 | 187 // ciObject::can_be_constant |
| 188 bool ciObject::can_be_constant() { | |
| 189 if (ScavengeRootsInCode >= 1) return true; // now everybody can encode as a constant | |
| 190 return handle() == NULL || !is_scavengable(); | |
| 191 } | |
| 192 | |
| 193 // ------------------------------------------------------------------ | |
| 194 // ciObject::should_be_constant() | |
| 195 bool ciObject::should_be_constant() { | |
| 196 if (ScavengeRootsInCode >= 2) return true; // force everybody to be a constant | |
| 197 return handle() == NULL || !is_scavengable(); | |
| 0 | 198 } |
| 199 | |
| 200 | |
| 201 // ------------------------------------------------------------------ | |
| 202 // ciObject::print | |
| 203 // | |
| 204 // Print debugging output about this ciObject. | |
| 205 // | |
| 206 // Implementation note: dispatch to the virtual print_impl behavior | |
| 207 // for this ciObject. | |
| 208 void ciObject::print(outputStream* st) { | |
| 209 st->print("<%s", type_string()); | |
| 210 GUARDED_VM_ENTRY(print_impl(st);) | |
| 989 | 211 st->print(" ident=%d %s%s address=0x%x>", ident(), |
| 0 | 212 is_perm() ? "PERM" : "", |
| 989 | 213 is_scavengable() ? "SCAVENGABLE" : "", |
| 0 | 214 (address)this); |
| 215 } | |
| 216 | |
| 217 // ------------------------------------------------------------------ | |
| 218 // ciObject::print_oop | |
| 219 // | |
| 220 // Print debugging output about the oop this ciObject represents. | |
| 221 void ciObject::print_oop(outputStream* st) { | |
| 222 if (is_null_object()) { | |
| 223 st->print_cr("NULL"); | |
| 224 } else if (!is_loaded()) { | |
| 225 st->print_cr("UNLOADED"); | |
| 226 } else { | |
| 227 GUARDED_VM_ENTRY(get_oop()->print_on(st);) | |
| 228 } | |
| 229 } |