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.util.ArrayUtil;
020 import kotlin.jvm.functions.Function0;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.kotlin.codegen.context.CodegenContext;
023 import org.jetbrains.kotlin.codegen.context.MethodContext;
024 import org.jetbrains.kotlin.codegen.context.ScriptContext;
025 import org.jetbrains.kotlin.codegen.state.GenerationState;
026 import org.jetbrains.kotlin.descriptors.ClassDescriptor;
027 import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
028 import org.jetbrains.kotlin.descriptors.ScriptDescriptor;
029 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor;
030 import org.jetbrains.kotlin.psi.*;
031 import org.jetbrains.kotlin.resolve.BindingContext;
032 import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOriginKt;
033 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
034 import org.jetbrains.org.objectweb.asm.MethodVisitor;
035 import org.jetbrains.org.objectweb.asm.Type;
036 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
037
038 import java.util.Collections;
039 import java.util.List;
040
041 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.CLASS_FOR_SCRIPT;
042 import static org.jetbrains.kotlin.codegen.binding.CodegenBinding.asmTypeForScriptDescriptor;
043 import static org.jetbrains.kotlin.resolve.jvm.AsmTypes.OBJECT_TYPE;
044 import static org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin.NO_ORIGIN;
045 import static org.jetbrains.org.objectweb.asm.Opcodes.*;
046
047 public class ScriptCodegen extends MemberCodegen<KtScript> {
048
049 public static ScriptCodegen createScriptCodegen(
050 @NotNull KtScript declaration,
051 @NotNull GenerationState state,
052 @NotNull CodegenContext parentContext
053 ) {
054 BindingContext bindingContext = state.getBindingContext();
055 ScriptDescriptor scriptDescriptor = bindingContext.get(BindingContext.SCRIPT, declaration);
056 assert scriptDescriptor != null;
057
058 ClassDescriptor classDescriptorForScript = bindingContext.get(CLASS_FOR_SCRIPT, scriptDescriptor);
059 assert classDescriptorForScript != null;
060
061 Type classType = asmTypeForScriptDescriptor(bindingContext, scriptDescriptor);
062
063 ClassBuilder builder = state.getFactory().newVisitor(JvmDeclarationOriginKt.OtherOrigin(declaration, classDescriptorForScript),
064 classType, declaration.getContainingFile());
065 List<ScriptDescriptor> earlierScripts = state.getEarlierScriptsForReplInterpreter();
066 ScriptContext scriptContext = parentContext.intoScript(
067 scriptDescriptor,
068 earlierScripts == null ? Collections.<ScriptDescriptor>emptyList() : earlierScripts,
069 classDescriptorForScript
070 );
071 return new ScriptCodegen(declaration, state, scriptContext, builder);
072 }
073
074 private final KtScript scriptDeclaration;
075 private final ScriptContext context;
076 private final ScriptDescriptor scriptDescriptor;
077
078 private ScriptCodegen(
079 @NotNull KtScript scriptDeclaration,
080 @NotNull GenerationState state,
081 @NotNull ScriptContext context,
082 @NotNull ClassBuilder builder
083 ) {
084 super(state, null, context, scriptDeclaration, builder);
085 this.scriptDeclaration = scriptDeclaration;
086 this.context = context;
087 this.scriptDescriptor = context.getScriptDescriptor();
088 }
089
090 @Override
091 protected void generateDeclaration() {
092 Type classType = typeMapper.mapClass(context.getContextDescriptor());
093
094 v.defineClass(scriptDeclaration,
095 V1_6,
096 ACC_PUBLIC,
097 classType.getInternalName(),
098 null,
099 "java/lang/Object",
100 ArrayUtil.EMPTY_STRING_ARRAY);
101 }
102
103 @Override
104 protected void generateBody() {
105 genMembers();
106 genFieldsForParameters(scriptDescriptor, v);
107 genConstructor(scriptDescriptor, context.getContextDescriptor(), v,
108 context.intoFunction(scriptDescriptor.getScriptCodeDescriptor()));
109 }
110
111 @Override
112 protected void generateKotlinAnnotation() {
113 // TODO
114 }
115
116 private void genConstructor(
117 @NotNull ScriptDescriptor scriptDescriptor,
118 @NotNull ClassDescriptor classDescriptorForScript,
119 @NotNull ClassBuilder classBuilder,
120 @NotNull MethodContext methodContext
121 ) {
122 //noinspection ConstantConditions
123 Type blockType = typeMapper.mapType(scriptDescriptor.getScriptCodeDescriptor().getReturnType());
124
125 PropertyDescriptor scriptResultProperty = scriptDescriptor.getScriptResultProperty();
126 classBuilder.newField(JvmDeclarationOriginKt.OtherOrigin(scriptResultProperty),
127 ACC_PUBLIC | ACC_FINAL, scriptResultProperty.getName().asString(),
128 blockType.getDescriptor(), null, null);
129
130 JvmMethodSignature jvmSignature = typeMapper.mapScriptSignature(scriptDescriptor, context.getEarlierScripts());
131
132 MethodVisitor mv = classBuilder.newMethod(
133 JvmDeclarationOriginKt.OtherOrigin(scriptDeclaration, scriptDescriptor.getClassDescriptor().getUnsubstitutedPrimaryConstructor()),
134 ACC_PUBLIC, jvmSignature.getAsmMethod().getName(), jvmSignature.getAsmMethod().getDescriptor(),
135 null, null);
136
137 if (state.getClassBuilderMode() == ClassBuilderMode.FULL) {
138 mv.visitCode();
139
140 InstructionAdapter iv = new InstructionAdapter(mv);
141
142 Type classType = typeMapper.mapType(classDescriptorForScript);
143
144 iv.load(0, classType);
145 iv.invokespecial("java/lang/Object", "<init>", "()V", false);
146
147 iv.load(0, classType);
148
149 FrameMap frameMap = new FrameMap();
150 frameMap.enterTemp(OBJECT_TYPE);
151
152 for (ScriptDescriptor importedScript : context.getEarlierScripts()) {
153 frameMap.enter(importedScript, OBJECT_TYPE);
154 }
155
156 Type[] argTypes = jvmSignature.getAsmMethod().getArgumentTypes();
157 int add = 0;
158
159 for (int i = 0; i < scriptDescriptor.getScriptCodeDescriptor().getValueParameters().size(); i++) {
160 ValueParameterDescriptor parameter = scriptDescriptor.getScriptCodeDescriptor().getValueParameters().get(i);
161 frameMap.enter(parameter, argTypes[i + add]);
162 }
163
164 int offset = 1;
165
166 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
167 Type earlierClassType = asmTypeForScriptDescriptor(bindingContext, earlierScript);
168 iv.load(0, classType);
169 iv.load(offset, earlierClassType);
170 offset += earlierClassType.getSize();
171 iv.putfield(classType.getInternalName(), context.getScriptFieldName(earlierScript), earlierClassType.getDescriptor());
172 }
173
174 for (ValueParameterDescriptor parameter : scriptDescriptor.getScriptCodeDescriptor().getValueParameters()) {
175 Type parameterType = typeMapper.mapType(parameter.getType());
176 iv.load(0, classType);
177 iv.load(offset, parameterType);
178 offset += parameterType.getSize();
179 iv.putfield(classType.getInternalName(), parameter.getName().getIdentifier(), parameterType.getDescriptor());
180 }
181
182 final ExpressionCodegen codegen = new ExpressionCodegen(mv, frameMap, Type.VOID_TYPE, methodContext, state, this);
183
184 generateInitializers(new Function0<ExpressionCodegen>() {
185 @Override
186 public ExpressionCodegen invoke() {
187 return codegen;
188 }
189 });
190
191 StackValue stackValue = codegen.gen(scriptDeclaration.getBlockExpression());
192 if (stackValue.type != Type.VOID_TYPE) {
193 StackValue.Field resultValue = StackValue
194 .field(blockType, classType, ScriptDescriptor.LAST_EXPRESSION_VALUE_FIELD_NAME, false, StackValue.LOCAL_0);
195 resultValue.store(stackValue, iv);
196 }
197 else {
198 stackValue.put(blockType, iv);
199 }
200
201 iv.areturn(Type.VOID_TYPE);
202 }
203
204 mv.visitMaxs(-1, -1);
205 mv.visitEnd();
206 }
207
208 private void genFieldsForParameters(@NotNull ScriptDescriptor script, @NotNull ClassBuilder classBuilder) {
209 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
210 Type earlierClassName = asmTypeForScriptDescriptor(bindingContext, earlierScript);
211 int access = ACC_PRIVATE | ACC_FINAL;
212 classBuilder.newField(NO_ORIGIN, access, context.getScriptFieldName(earlierScript), earlierClassName.getDescriptor(), null, null);
213 }
214
215 for (ValueParameterDescriptor parameter : script.getScriptCodeDescriptor().getValueParameters()) {
216 Type parameterType = typeMapper.mapType(parameter);
217 int access = ACC_PUBLIC | ACC_FINAL;
218 classBuilder.newField(JvmDeclarationOriginKt.OtherOrigin(parameter), access, parameter.getName().getIdentifier(), parameterType.getDescriptor(), null, null);
219 }
220 }
221
222 private void genMembers() {
223 for (KtDeclaration declaration : scriptDeclaration.getDeclarations()) {
224 if (declaration instanceof KtProperty || declaration instanceof KtNamedFunction) {
225 genFunctionOrProperty(declaration);
226 }
227 else if (declaration instanceof KtClassOrObject) {
228 genClassOrObject((KtClassOrObject) declaration);
229 }
230 }
231 }
232 }