001 /*
002 * Copyright 2010-2013 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.jet.codegen;
018
019 import kotlin.Function0;
020 import org.jetbrains.annotations.NotNull;
021 import org.jetbrains.jet.codegen.context.CodegenContext;
022 import org.jetbrains.jet.codegen.context.MethodContext;
023 import org.jetbrains.jet.codegen.context.ScriptContext;
024 import org.jetbrains.jet.codegen.state.GenerationState;
025 import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
026 import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
027 import org.jetbrains.jet.lang.descriptors.ScriptDescriptor;
028 import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
029 import org.jetbrains.jet.lang.psi.JetDeclaration;
030 import org.jetbrains.jet.lang.psi.JetScript;
031 import org.jetbrains.jet.lang.resolve.BindingContext;
032 import org.jetbrains.jet.lang.resolve.java.jvmSignature.JvmMethodSignature;
033 import org.jetbrains.org.objectweb.asm.MethodVisitor;
034 import org.jetbrains.org.objectweb.asm.Type;
035 import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
036
037 import java.util.Collections;
038 import java.util.List;
039
040 import static org.jetbrains.jet.codegen.binding.CodegenBinding.*;
041 import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.OBJECT_TYPE;
042 import static org.jetbrains.jet.lang.resolve.java.diagnostics.DiagnosticsPackage.OtherOrigin;
043 import static org.jetbrains.jet.lang.resolve.java.diagnostics.JvmDeclarationOrigin.NO_ORIGIN;
044 import static org.jetbrains.org.objectweb.asm.Opcodes.*;
045
046 // SCRIPT: script code generator
047 public class ScriptCodegen extends MemberCodegen<JetScript> {
048
049 public static ScriptCodegen createScriptCodegen(
050 @NotNull JetScript declaration,
051 @NotNull GenerationState state,
052 @NotNull CodegenContext parentContext
053 ) {
054 ScriptDescriptor scriptDescriptor = state.getBindingContext().get(BindingContext.SCRIPT, declaration);
055 assert scriptDescriptor != null;
056
057 ClassDescriptor classDescriptorForScript = state.getBindingContext().get(CLASS_FOR_SCRIPT, scriptDescriptor);
058 assert classDescriptorForScript != null;
059
060 Type className = state.getBindingContext().get(ASM_TYPE, classDescriptorForScript);
061 assert className != null;
062
063 ClassBuilder builder = state.getFactory().newVisitor(OtherOrigin(declaration, classDescriptorForScript),
064 className, 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 JetScript scriptDeclaration;
075 private final ScriptContext context;
076 private final ScriptDescriptor scriptDescriptor;
077
078 private ScriptCodegen(
079 @NotNull JetScript 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 = bindingContext.get(ASM_TYPE, context.getContextDescriptor());
093 assert classType != null;
094
095 v.defineClass(scriptDeclaration,
096 V1_6,
097 ACC_PUBLIC,
098 classType.getInternalName(),
099 null,
100 "java/lang/Object",
101 new String[0]);
102 }
103
104 @Override
105 protected void generateBody() {
106 genMembers();
107 genFieldsForParameters(scriptDescriptor, v);
108 genConstructor(scriptDescriptor, context.getContextDescriptor(), v,
109 context.intoFunction(scriptDescriptor.getScriptCodeDescriptor()));
110 }
111
112 @Override
113 protected void generateKotlinAnnotation() {
114 // TODO
115 }
116
117 private void genConstructor(
118 @NotNull ScriptDescriptor scriptDescriptor,
119 @NotNull ClassDescriptor classDescriptorForScript,
120 @NotNull ClassBuilder classBuilder,
121 @NotNull final MethodContext methodContext
122 ) {
123 Type blockType = typeMapper.mapType(scriptDescriptor.getScriptCodeDescriptor().getReturnType());
124
125 PropertyDescriptor scriptResultProperty = scriptDescriptor.getScriptResultProperty();
126 classBuilder.newField(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 OtherOrigin(scriptDeclaration, scriptDescriptor.getClassDescriptor().getUnsubstitutedPrimaryConstructor()),
134 ACC_PUBLIC, jvmSignature.getAsmMethod().getName(), jvmSignature.getAsmMethod().getDescriptor(),
135 null, null);
136
137 mv.visitCode();
138
139 final InstructionAdapter instructionAdapter = new InstructionAdapter(mv);
140
141 Type classType = bindingContext.get(ASM_TYPE, classDescriptorForScript);
142 assert classType != null;
143
144 instructionAdapter.load(0, classType);
145 instructionAdapter.invokespecial("java/lang/Object", "<init>", "()V", false);
146
147 instructionAdapter.load(0, classType);
148
149 final 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 generateInitializers(new Function0<ExpressionCodegen>() {
165 @Override
166 public ExpressionCodegen invoke() {
167 return new ExpressionCodegen(instructionAdapter, frameMap, Type.VOID_TYPE, methodContext, state, ScriptCodegen.this);
168 }
169 });
170
171 int offset = 1;
172
173 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
174 Type earlierClassType = asmTypeForScriptDescriptor(bindingContext, earlierScript);
175 instructionAdapter.load(0, classType);
176 instructionAdapter.load(offset, earlierClassType);
177 offset += earlierClassType.getSize();
178 instructionAdapter.putfield(classType.getInternalName(), context.getScriptFieldName(earlierScript), earlierClassType.getDescriptor());
179 }
180
181 for (ValueParameterDescriptor parameter : scriptDescriptor.getScriptCodeDescriptor().getValueParameters()) {
182 Type parameterType = typeMapper.mapType(parameter.getType());
183 instructionAdapter.load(0, classType);
184 instructionAdapter.load(offset, parameterType);
185 offset += parameterType.getSize();
186 instructionAdapter.putfield(classType.getInternalName(), parameter.getName().getIdentifier(), parameterType.getDescriptor());
187 }
188
189 StackValue stackValue =
190 new ExpressionCodegen(mv, frameMap, Type.VOID_TYPE, methodContext, state, this).gen(scriptDeclaration.getBlockExpression());
191 if (stackValue.type != Type.VOID_TYPE) {
192 stackValue.put(stackValue.type, instructionAdapter);
193 instructionAdapter.putfield(classType.getInternalName(), ScriptDescriptor.LAST_EXPRESSION_VALUE_FIELD_NAME,
194 blockType.getDescriptor());
195 }
196
197 instructionAdapter.areturn(Type.VOID_TYPE);
198 mv.visitMaxs(-1, -1);
199 mv.visitEnd();
200 }
201
202 private void genFieldsForParameters(@NotNull ScriptDescriptor script, @NotNull ClassBuilder classBuilder) {
203 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
204 Type earlierClassName = asmTypeForScriptDescriptor(bindingContext, earlierScript);
205 int access = ACC_PRIVATE | ACC_FINAL;
206 classBuilder.newField(NO_ORIGIN, access, context.getScriptFieldName(earlierScript), earlierClassName.getDescriptor(), null, null);
207 }
208
209 for (ValueParameterDescriptor parameter : script.getScriptCodeDescriptor().getValueParameters()) {
210 Type parameterType = typeMapper.mapType(parameter);
211 int access = ACC_PUBLIC | ACC_FINAL;
212 classBuilder.newField(OtherOrigin(parameter), access, parameter.getName().getIdentifier(), parameterType.getDescriptor(), null, null);
213 }
214 }
215
216 private void genMembers() {
217 for (JetDeclaration declaration : scriptDeclaration.getDeclarations()) {
218 genFunctionOrProperty(declaration);
219 }
220 }
221 }