+++ /dev/null
-/*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v0.5
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v05.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- ******************************************************************************/
-package net.sourceforge.phpdt.internal.compiler.ast;
-
-import net.sourceforge.phpdt.internal.compiler.ClassFile;
-import net.sourceforge.phpdt.internal.compiler.CompilationResult;
-import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
-import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
-import net.sourceforge.phpdt.internal.compiler.codegen.ConstantPool;
-import net.sourceforge.phpdt.internal.compiler.codegen.Label;
-import net.sourceforge.phpdt.internal.compiler.flow.ExceptionHandlingFlowContext;
-import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
-import net.sourceforge.phpdt.internal.compiler.flow.InitializationFlowContext;
-import net.sourceforge.phpdt.internal.compiler.lookup.ClassScope;
-import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
-import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
-import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
-import net.sourceforge.phpdt.internal.compiler.parser.Parser;
-import net.sourceforge.phpdt.internal.compiler.problem.AbortMethod;
-
-public class Clinit extends AbstractMethodDeclaration {
-
- public final static char[] ConstantPoolName = "<clinit>".toCharArray(); //$NON-NLS-1$
-
- private FieldBinding assertionSyntheticFieldBinding = null;
- private FieldBinding classLiteralSyntheticField = null;
-
- public Clinit(CompilationResult compilationResult) {
- super(compilationResult);
- modifiers = 0;
- selector = ConstantPoolName;
- }
-
- public void analyseCode(
- ClassScope classScope,
- InitializationFlowContext staticInitializerFlowContext,
- FlowInfo flowInfo) {
-
- if (ignoreFurtherInvestigation)
- return;
- try {
- ExceptionHandlingFlowContext clinitContext =
- new ExceptionHandlingFlowContext(
- staticInitializerFlowContext.parent,
- this,
- NoExceptions,
- scope,
- FlowInfo.DeadEnd);
-
- // check for missing returning path
- needFreeReturn =
- !((flowInfo == FlowInfo.DeadEnd) || flowInfo.isFakeReachable());
-
- // check missing blank final field initializations
- flowInfo = flowInfo.mergedWith(staticInitializerFlowContext.initsOnReturn);
- FieldBinding[] fields = scope.enclosingSourceType().fields();
- for (int i = 0, count = fields.length; i < count; i++) {
- FieldBinding field;
- if ((field = fields[i]).isStatic()
- && field.isFinal()
- && (!flowInfo.isDefinitelyAssigned(fields[i]))) {
- scope.problemReporter().uninitializedBlankFinalField(
- field,
- scope.referenceType().declarationOf(field));
- // can complain against the field decl, since only one <clinit>
- }
- }
- // check static initializers thrown exceptions
- staticInitializerFlowContext.checkInitializerExceptions(
- scope,
- clinitContext,
- flowInfo);
- } catch (AbortMethod e) {
- this.ignoreFurtherInvestigation = true;
- }
- }
-
- /**
- * Bytecode generation for a <clinit> method
- *
- * @param classScope org.eclipse.jdt.internal.compiler.lookup.ClassScope
- * @param classFile org.eclipse.jdt.internal.compiler.codegen.ClassFile
- */
- public void generateCode(ClassScope classScope, ClassFile classFile) {
-
- int clinitOffset = 0;
- if (ignoreFurtherInvestigation) {
- // should never have to add any <clinit> problem method
- return;
- }
- try {
- clinitOffset = classFile.contentsOffset;
- this.generateCode(classScope, classFile, clinitOffset);
- } catch (AbortMethod e) {
- // should never occur
- // the clinit referenceContext is the type declaration
- // All clinit problems will be reported against the type: AbortType instead of AbortMethod
- // reset the contentsOffset to the value before generating the clinit code
- // decrement the number of method info as well.
- // This is done in the addProblemMethod and addProblemConstructor for other
- // cases.
- if (e.compilationResult == CodeStream.RESTART_IN_WIDE_MODE) {
- // a branch target required a goto_w, restart code gen in wide mode.
- try {
- if (statements != null) {
- for (int i = 0, max = statements.length; i < max; i++)
- statements[i].resetStateForCodeGeneration();
- }
- classFile.contentsOffset = clinitOffset;
- classFile.methodCount--;
- classFile.codeStream.wideMode = true; // request wide mode
- this.generateCode(classScope, classFile, clinitOffset);
- // restart method generation
- } catch (AbortMethod e2) {
- classFile.contentsOffset = clinitOffset;
- classFile.methodCount--;
- }
- } else {
- // produce a problem method accounting for this fatal error
- classFile.contentsOffset = clinitOffset;
- classFile.methodCount--;
- }
- }
- }
-
- /**
- * Bytecode generation for a <clinit> method
- *
- * @param classScope org.eclipse.jdt.internal.compiler.lookup.ClassScope
- * @param classFile org.eclipse.jdt.internal.compiler.codegen.ClassFile
- */
- private void generateCode(
- ClassScope classScope,
- ClassFile classFile,
- int clinitOffset) {
-
- ConstantPool constantPool = classFile.constantPool;
- int constantPoolOffset = constantPool.currentOffset;
- int constantPoolIndex = constantPool.currentIndex;
- classFile.generateMethodInfoHeaderForClinit();
- int codeAttributeOffset = classFile.contentsOffset;
- classFile.generateCodeAttributeHeader();
- CodeStream codeStream = classFile.codeStream;
- this.resolve(classScope);
-
- codeStream.reset(this, classFile);
- TypeDeclaration declaringType = classScope.referenceContext;
-
- // initialize local positions - including initializer scope.
- scope.computeLocalVariablePositions(0, codeStream); // should not be necessary
- MethodScope staticInitializerScope = declaringType.staticInitializerScope;
- staticInitializerScope.computeLocalVariablePositions(0, codeStream);
- // offset by the argument size
-
- // 1.4 feature
- // This has to be done before any other initialization
- if (this.assertionSyntheticFieldBinding != null) {
- // generate code related to the activation of assertion for this class
- codeStream.generateClassLiteralAccessForType(
- classScope.enclosingSourceType(),
- classLiteralSyntheticField);
- codeStream.invokeJavaLangClassDesiredAssertionStatus();
- Label falseLabel = new Label(codeStream);
- codeStream.ifne(falseLabel);
- codeStream.iconst_1();
- Label jumpLabel = new Label(codeStream);
- codeStream.goto_(jumpLabel);
- falseLabel.place();
- codeStream.iconst_0();
- jumpLabel.place();
- codeStream.putstatic(this.assertionSyntheticFieldBinding);
- }
- // generate initializers
- if (declaringType.fields != null) {
- for (int i = 0, max = declaringType.fields.length; i < max; i++) {
- FieldDeclaration fieldDecl;
- if ((fieldDecl = declaringType.fields[i]).isStatic()) {
- fieldDecl.generateCode(staticInitializerScope, codeStream);
- }
- }
- }
- if (codeStream.position == 0) {
- // do not need to output a Clinit if no bytecodes
- // so we reset the offset inside the byte array contents.
- classFile.contentsOffset = clinitOffset;
- // like we don't addd a method we need to undo the increment on the method count
- classFile.methodCount--;
- // reset the constant pool to its state before the clinit
- constantPool.resetForClinit(constantPoolIndex, constantPoolOffset);
- } else {
- if (needFreeReturn) {
- int oldPosition = codeStream.position;
- codeStream.return_();
- codeStream.updateLocalVariablesAttribute(oldPosition);
- }
- // Record the end of the clinit: point to the declaration of the class
- codeStream.recordPositionsFrom(0, declaringType.sourceStart);
- classFile.completeCodeAttributeForClinit(codeAttributeOffset);
- }
- }
-
- public boolean isClinit() {
-
- return true;
- }
-
- public boolean isInitializationMethod() {
-
- return true;
- }
-
- public boolean isStatic() {
-
- return true;
- }
-
- public void parseStatements(Parser parser, CompilationUnitDeclaration unit) {
- //the clinit is filled by hand ....
- }
-
- public void resolve(ClassScope scope) {
-
- this.scope = new MethodScope(scope, scope.referenceContext, true);
- }
-
- public String toString(int tab) {
-
- String s = ""; //$NON-NLS-1$
- s = s + tabString(tab);
- s = s + "<clinit>()"; //$NON-NLS-1$
- s = s + toStringStatements(tab + 1);
- return s;
- }
-
- public void traverse(
- IAbstractSyntaxTreeVisitor visitor,
- ClassScope classScope) {
-
- visitor.visit(this, classScope);
- visitor.endVisit(this, classScope);
- }
-
- // 1.4 feature
- public void addSupportForAssertion(FieldBinding assertionSyntheticFieldBinding) {
-
- this.assertionSyntheticFieldBinding = assertionSyntheticFieldBinding;
-
- // we need to add the field right now, because the field infos are generated before the methods
- SourceTypeBinding sourceType =
- this.scope.outerMostMethodScope().enclosingSourceType();
- this.classLiteralSyntheticField =
- sourceType.addSyntheticField(sourceType, scope);
- }
-
-}
\ No newline at end of file
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