001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.codegen;
018
019 import com.intellij.psi.PsiElement;
020 import com.intellij.psi.PsiFile;
021 import kotlin.CollectionsKt;
022 import kotlin.StringsKt;
023 import kotlin.jvm.functions.Function1;
024 import org.jetbrains.annotations.NotNull;
025 import org.jetbrains.annotations.Nullable;
026 import org.jetbrains.kotlin.codegen.binding.CalculatedClosure;
027 import org.jetbrains.kotlin.codegen.context.CodegenContext;
028 import org.jetbrains.kotlin.codegen.context.FacadePartWithSourceFile;
029 import org.jetbrains.kotlin.codegen.context.MethodContext;
030 import org.jetbrains.kotlin.codegen.context.RootContext;
031 import org.jetbrains.kotlin.codegen.state.GenerationState;
032 import org.jetbrains.kotlin.codegen.state.JetTypeMapper;
033 import org.jetbrains.kotlin.descriptors.*;
034 import org.jetbrains.kotlin.load.java.JvmAbi;
035 import org.jetbrains.kotlin.load.java.JvmAnnotationNames;
036 import org.jetbrains.kotlin.load.kotlin.ModuleMapping;
037 import org.jetbrains.kotlin.load.kotlin.ModuleVisibilityUtilsKt;
038 import org.jetbrains.kotlin.psi.KtFile;
039 import org.jetbrains.kotlin.psi.KtFunction;
040 import org.jetbrains.kotlin.psi.codeFragmentUtil.CodeFragmentUtilKt;
041 import org.jetbrains.kotlin.resolve.BindingContext;
042 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
043 import org.jetbrains.kotlin.resolve.DescriptorUtils;
044 import org.jetbrains.kotlin.resolve.inline.InlineUtil;
045 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedCallableMemberDescriptor;
046 import org.jetbrains.kotlin.types.KotlinType;
047 import org.jetbrains.org.objectweb.asm.AnnotationVisitor;
048
049 import java.io.File;
050
051 import static org.jetbrains.kotlin.descriptors.Modality.ABSTRACT;
052 import static org.jetbrains.kotlin.descriptors.Modality.FINAL;
053
054 public class JvmCodegenUtil {
055
056 private JvmCodegenUtil() {
057 }
058
059 public static boolean isJvmInterface(DeclarationDescriptor descriptor) {
060 if (descriptor instanceof ClassDescriptor) {
061 ClassKind kind = ((ClassDescriptor) descriptor).getKind();
062 return kind == ClassKind.INTERFACE || kind == ClassKind.ANNOTATION_CLASS;
063 }
064 return false;
065 }
066
067 public static boolean isJvmInterface(KotlinType type) {
068 return isJvmInterface(type.getConstructor().getDeclarationDescriptor());
069 }
070
071 public static boolean isConst(@NotNull CalculatedClosure closure) {
072 return closure.getCaptureThis() == null && closure.getCaptureReceiverType() == null && closure.getCaptureVariables().isEmpty();
073 }
074
075 private static boolean isCallInsideSameClassAsDeclared(@NotNull CallableMemberDescriptor descriptor, @NotNull CodegenContext context) {
076 boolean isFakeOverride = descriptor.getKind() == CallableMemberDescriptor.Kind.FAKE_OVERRIDE;
077 boolean isDelegate = descriptor.getKind() == CallableMemberDescriptor.Kind.DELEGATION;
078
079 DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration().getOriginal();
080
081 return !isFakeOverride && !isDelegate &&
082 (((context.hasThisDescriptor() && containingDeclaration == context.getThisDescriptor()) ||
083 ((context.getParentContext() instanceof FacadePartWithSourceFile)
084 && isWithinSameFile(((FacadePartWithSourceFile) context.getParentContext()).getSourceFile(), descriptor)))
085 && context.getContextKind() != OwnerKind.DEFAULT_IMPLS);
086 }
087
088 private static boolean isWithinSameFile(
089 @Nullable KtFile callerFile,
090 @NotNull CallableMemberDescriptor descriptor
091 ) {
092 DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration().getOriginal();
093 if (containingDeclaration instanceof PackageFragmentDescriptor) {
094 PsiElement calleeElement = DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
095 PsiFile calleeFile = calleeElement != null ? calleeElement.getContainingFile() : null;
096 return callerFile != null && callerFile != SourceFile.NO_SOURCE_FILE && calleeFile == callerFile;
097
098 }
099 return false;
100 }
101
102 public static boolean isCallInsideSameModuleAsDeclared(
103 @NotNull CallableMemberDescriptor declarationDescriptor,
104 @NotNull CodegenContext context,
105 @Nullable File outDirectory
106 ) {
107 if (context instanceof RootContext) {
108 return true;
109 }
110 DeclarationDescriptor contextDescriptor = context.getContextDescriptor();
111
112 CallableMemberDescriptor directMember = getDirectMember(declarationDescriptor);
113 if (directMember instanceof DeserializedCallableMemberDescriptor) {
114 return ModuleVisibilityUtilsKt.isContainedByCompiledPartOfOurModule(directMember, outDirectory);
115 }
116 else {
117 return DescriptorUtils.areInSameModule(directMember, contextDescriptor);
118 }
119 }
120
121 public static boolean hasAbstractMembers(@NotNull ClassDescriptor classDescriptor) {
122 return CollectionsKt.any(classDescriptor.getDefaultType().getMemberScope().getAllDescriptors(),
123 new Function1<DeclarationDescriptor, Boolean>() {
124 @Override
125 public Boolean invoke(DeclarationDescriptor descriptor) {
126 return descriptor instanceof CallableMemberDescriptor &&
127 ((CallableMemberDescriptor) descriptor).getModality() == ABSTRACT;
128 }
129 }
130 );
131 }
132
133 public static boolean couldUseDirectAccessToProperty(
134 @NotNull PropertyDescriptor property,
135 boolean forGetter,
136 boolean isDelegated,
137 @NotNull MethodContext context
138 ) {
139 if (JetTypeMapper.isAccessor(property)) return false;
140
141 // Inline functions can't use direct access because a field may not be visible at the call site
142 if (context.isInlineFunction() && !Visibilities.isPrivate(property.getVisibility())) {
143 return false;
144 }
145
146 // Only properties of the same class can be directly accessed, except when we are evaluating expressions in the debugger
147 if (!isCallInsideSameClassAsDeclared(property, context) && !isDebuggerContext(context)) return false;
148
149 // Delegated and extension properties have no backing fields
150 if (isDelegated || property.getExtensionReceiverParameter() != null) return false;
151
152 // Companion object properties cannot be accessed directly because their backing fields are stored in the containing class
153 if (DescriptorUtils.isCompanionObject(property.getContainingDeclaration())) return false;
154
155 PropertyAccessorDescriptor accessor = forGetter ? property.getGetter() : property.getSetter();
156
157 // If there's no accessor declared we can use direct access
158 if (accessor == null) return true;
159
160 // If the accessor is non-default (i.e. it has some code) we should call that accessor and not use direct access
161 if (accessor.hasBody()) return false;
162
163 // If the accessor is private or final, it can't be overridden in the subclass and thus we can use direct access
164 return Visibilities.isPrivate(property.getVisibility()) || accessor.getModality() == FINAL;
165 }
166
167 private static boolean isDebuggerContext(@NotNull MethodContext context) {
168 KtFile file = DescriptorToSourceUtils.getContainingFile(context.getContextDescriptor());
169 return file != null && CodeFragmentUtilKt.getSuppressDiagnosticsInDebugMode(file);
170 }
171
172 @Nullable
173 public static ClassDescriptor getDispatchReceiverParameterForConstructorCall(
174 @NotNull ConstructorDescriptor descriptor,
175 @Nullable CalculatedClosure closure
176 ) {
177 //for compilation against sources
178 if (closure != null) {
179 return closure.getCaptureThis();
180 }
181
182 //for compilation against binaries
183 //TODO: It's best to use this code also for compilation against sources
184 // but sometimes structures that have dispatchReceiver (bug?) mapped to static classes
185 ReceiverParameterDescriptor dispatchReceiver = descriptor.getDispatchReceiverParameter();
186 if (dispatchReceiver != null) {
187 ClassDescriptor expectedThisClass = (ClassDescriptor) dispatchReceiver.getContainingDeclaration();
188 if (!expectedThisClass.getKind().isSingleton()) {
189 return expectedThisClass;
190 }
191 }
192
193 return null;
194 }
195
196 @NotNull
197 public static CallableMemberDescriptor getDirectMember(@NotNull CallableMemberDescriptor descriptor) {
198 return descriptor instanceof PropertyAccessorDescriptor
199 ? ((PropertyAccessorDescriptor) descriptor).getCorrespondingProperty()
200 : descriptor;
201 }
202
203 public static boolean isArgumentWhichWillBeInlined(@NotNull BindingContext bindingContext, @NotNull DeclarationDescriptor descriptor) {
204 PsiElement declaration = DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
205 return InlineUtil.canBeInlineArgument(declaration) &&
206 InlineUtil.isInlinedArgument((KtFunction) declaration, bindingContext, false);
207 }
208
209 @NotNull
210 public static String getModuleName(ModuleDescriptor module) {
211 return StringsKt.removeSurrounding(module.getName().asString(), "<", ">");
212 }
213
214 @NotNull
215 public static String getMappingFileName(@NotNull String moduleName) {
216 return "META-INF/" + moduleName + "." + ModuleMapping.MAPPING_FILE_EXT;
217 }
218
219 public static void writeAbiVersion(@NotNull AnnotationVisitor av) {
220 av.visit(JvmAnnotationNames.VERSION_FIELD_NAME, JvmAbi.VERSION.toArray());
221
222 // TODO: drop after some time
223 av.visit(JvmAnnotationNames.OLD_ABI_VERSION_FIELD_NAME, 32);
224 }
225
226 public static void writeModuleName(@NotNull AnnotationVisitor av, @NotNull GenerationState state) {
227 String name = state.getModuleName();
228 if (!name.equals(JvmAbi.DEFAULT_MODULE_NAME)) {
229 av.visit(JvmAnnotationNames.MODULE_NAME_FIELD_NAME, name);
230 }
231 }
232 }