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 com.intellij.util.ArrayUtil;
020 import kotlin.Function0;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.jet.codegen.context.CodegenContext;
023 import org.jetbrains.jet.codegen.context.MethodContext;
024 import org.jetbrains.jet.codegen.context.ScriptContext;
025 import org.jetbrains.jet.codegen.state.GenerationState;
026 import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
027 import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
028 import org.jetbrains.jet.lang.descriptors.ScriptDescriptor;
029 import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
030 import org.jetbrains.jet.lang.psi.*;
031 import org.jetbrains.jet.lang.resolve.BindingContext;
032 import org.jetbrains.jet.lang.resolve.java.JvmAbi;
033 import org.jetbrains.jet.lang.resolve.java.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.jet.codegen.AsmUtil.method;
042 import static org.jetbrains.jet.codegen.binding.CodegenBinding.CLASS_FOR_SCRIPT;
043 import static org.jetbrains.jet.codegen.binding.CodegenBinding.asmTypeForScriptDescriptor;
044 import static org.jetbrains.jet.lang.resolve.java.AsmTypeConstants.*;
045 import static org.jetbrains.jet.lang.resolve.java.diagnostics.DiagnosticsPackage.OtherOrigin;
046 import static org.jetbrains.jet.lang.resolve.java.diagnostics.JvmDeclarationOrigin.NO_ORIGIN;
047 import static org.jetbrains.org.objectweb.asm.Opcodes.*;
048
049 // SCRIPT: script code generator
050 public class ScriptCodegen extends MemberCodegen<JetScript> {
051
052 public static ScriptCodegen createScriptCodegen(
053 @NotNull JetScript declaration,
054 @NotNull GenerationState state,
055 @NotNull CodegenContext parentContext
056 ) {
057 BindingContext bindingContext = state.getBindingContext();
058 ScriptDescriptor scriptDescriptor = bindingContext.get(BindingContext.SCRIPT, declaration);
059 assert scriptDescriptor != null;
060
061 ClassDescriptor classDescriptorForScript = bindingContext.get(CLASS_FOR_SCRIPT, scriptDescriptor);
062 assert classDescriptorForScript != null;
063
064 Type classType = asmTypeForScriptDescriptor(bindingContext, scriptDescriptor);
065
066 ClassBuilder builder = state.getFactory().newVisitor(OtherOrigin(declaration, classDescriptorForScript),
067 classType, declaration.getContainingFile());
068 List<ScriptDescriptor> earlierScripts = state.getEarlierScriptsForReplInterpreter();
069 ScriptContext scriptContext = parentContext.intoScript(
070 scriptDescriptor,
071 earlierScripts == null ? Collections.<ScriptDescriptor>emptyList() : earlierScripts,
072 classDescriptorForScript
073 );
074 return new ScriptCodegen(declaration, state, scriptContext, builder);
075 }
076
077 private final JetScript scriptDeclaration;
078 private final ScriptContext context;
079 private final ScriptDescriptor scriptDescriptor;
080
081 private ScriptCodegen(
082 @NotNull JetScript scriptDeclaration,
083 @NotNull GenerationState state,
084 @NotNull ScriptContext context,
085 @NotNull ClassBuilder builder
086 ) {
087 super(state, null, context, scriptDeclaration, builder);
088 this.scriptDeclaration = scriptDeclaration;
089 this.context = context;
090 this.scriptDescriptor = context.getScriptDescriptor();
091 }
092
093 @Override
094 protected void generateDeclaration() {
095 Type classType = typeMapper.mapClass(context.getContextDescriptor());
096
097 v.defineClass(scriptDeclaration,
098 V1_6,
099 ACC_PUBLIC,
100 classType.getInternalName(),
101 null,
102 "java/lang/Object",
103 ArrayUtil.EMPTY_STRING_ARRAY);
104
105 generateReflectionObjectField(state, classType, v, method("kClassFromKotlin", K_CLASS_IMPL_TYPE, getType(Class.class)),
106 JvmAbi.KOTLIN_CLASS_FIELD_NAME, createOrGetClInitCodegen().v);
107 }
108
109 @Override
110 protected void generateBody() {
111 genMembers();
112 genFieldsForParameters(scriptDescriptor, v);
113 genConstructor(scriptDescriptor, context.getContextDescriptor(), v,
114 context.intoFunction(scriptDescriptor.getScriptCodeDescriptor()));
115 }
116
117 @Override
118 protected void generateKotlinAnnotation() {
119 // TODO
120 }
121
122 private void genConstructor(
123 @NotNull ScriptDescriptor scriptDescriptor,
124 @NotNull ClassDescriptor classDescriptorForScript,
125 @NotNull ClassBuilder classBuilder,
126 @NotNull final MethodContext methodContext
127 ) {
128 //noinspection ConstantConditions
129 Type blockType = typeMapper.mapType(scriptDescriptor.getScriptCodeDescriptor().getReturnType());
130
131 PropertyDescriptor scriptResultProperty = scriptDescriptor.getScriptResultProperty();
132 classBuilder.newField(OtherOrigin(scriptResultProperty),
133 ACC_PUBLIC | ACC_FINAL, scriptResultProperty.getName().asString(),
134 blockType.getDescriptor(), null, null);
135
136 JvmMethodSignature jvmSignature = typeMapper.mapScriptSignature(scriptDescriptor, context.getEarlierScripts());
137
138 MethodVisitor mv = classBuilder.newMethod(
139 OtherOrigin(scriptDeclaration, scriptDescriptor.getClassDescriptor().getUnsubstitutedPrimaryConstructor()),
140 ACC_PUBLIC, jvmSignature.getAsmMethod().getName(), jvmSignature.getAsmMethod().getDescriptor(),
141 null, null);
142
143 mv.visitCode();
144
145 final InstructionAdapter iv = new InstructionAdapter(mv);
146
147 Type classType = typeMapper.mapType(classDescriptorForScript);
148
149 iv.load(0, classType);
150 iv.invokespecial("java/lang/Object", "<init>", "()V", false);
151
152 iv.load(0, classType);
153
154 final FrameMap frameMap = new FrameMap();
155 frameMap.enterTemp(OBJECT_TYPE);
156
157 for (ScriptDescriptor importedScript : context.getEarlierScripts()) {
158 frameMap.enter(importedScript, OBJECT_TYPE);
159 }
160
161 Type[] argTypes = jvmSignature.getAsmMethod().getArgumentTypes();
162 int add = 0;
163
164 for (int i = 0; i < scriptDescriptor.getScriptCodeDescriptor().getValueParameters().size(); i++) {
165 ValueParameterDescriptor parameter = scriptDescriptor.getScriptCodeDescriptor().getValueParameters().get(i);
166 frameMap.enter(parameter, argTypes[i + add]);
167 }
168
169 generateInitializers(new Function0<ExpressionCodegen>() {
170 @Override
171 public ExpressionCodegen invoke() {
172 return new ExpressionCodegen(iv, frameMap, Type.VOID_TYPE, methodContext, state, ScriptCodegen.this);
173 }
174 });
175
176 int offset = 1;
177
178 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
179 Type earlierClassType = asmTypeForScriptDescriptor(bindingContext, earlierScript);
180 iv.load(0, classType);
181 iv.load(offset, earlierClassType);
182 offset += earlierClassType.getSize();
183 iv.putfield(classType.getInternalName(), context.getScriptFieldName(earlierScript), earlierClassType.getDescriptor());
184 }
185
186 for (ValueParameterDescriptor parameter : scriptDescriptor.getScriptCodeDescriptor().getValueParameters()) {
187 Type parameterType = typeMapper.mapType(parameter.getType());
188 iv.load(0, classType);
189 iv.load(offset, parameterType);
190 offset += parameterType.getSize();
191 iv.putfield(classType.getInternalName(), parameter.getName().getIdentifier(), parameterType.getDescriptor());
192 }
193
194 StackValue stackValue =
195 new ExpressionCodegen(mv, frameMap, Type.VOID_TYPE, methodContext, state, this).gen(scriptDeclaration.getBlockExpression());
196 if (stackValue.type != Type.VOID_TYPE) {
197 StackValue.Field resultValue = StackValue
198 .field(blockType, classType, ScriptDescriptor.LAST_EXPRESSION_VALUE_FIELD_NAME, false, StackValue.LOCAL_0);
199 resultValue.store(stackValue, iv);
200 } else {
201 stackValue.put(blockType, iv);
202 }
203
204 iv.areturn(Type.VOID_TYPE);
205 mv.visitMaxs(-1, -1);
206 mv.visitEnd();
207 }
208
209 private void genFieldsForParameters(@NotNull ScriptDescriptor script, @NotNull ClassBuilder classBuilder) {
210 for (ScriptDescriptor earlierScript : context.getEarlierScripts()) {
211 Type earlierClassName = asmTypeForScriptDescriptor(bindingContext, earlierScript);
212 int access = ACC_PRIVATE | ACC_FINAL;
213 classBuilder.newField(NO_ORIGIN, access, context.getScriptFieldName(earlierScript), earlierClassName.getDescriptor(), null, null);
214 }
215
216 for (ValueParameterDescriptor parameter : script.getScriptCodeDescriptor().getValueParameters()) {
217 Type parameterType = typeMapper.mapType(parameter);
218 int access = ACC_PUBLIC | ACC_FINAL;
219 classBuilder.newField(OtherOrigin(parameter), access, parameter.getName().getIdentifier(), parameterType.getDescriptor(), null, null);
220 }
221 }
222
223 private void genMembers() {
224 for (JetDeclaration declaration : scriptDeclaration.getDeclarations()) {
225 if (declaration instanceof JetProperty || declaration instanceof JetNamedFunction) {
226 genFunctionOrProperty(declaration);
227 }
228 else if (declaration instanceof JetClassOrObject) {
229 genClassOrObject((JetClassOrObject) declaration);
230 }
231 }
232 }
233 }