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Code Issues Wiki Activity

fix bug 64939 - recursive loop

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This commit is contained in:
Andrew Niefer 2004-06-03 18:48:17 +00:00
parent c3338eda94
commit b6aed83db2
8 changed files with 55 additions and 15 deletions
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10
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompleteParseASTTemplateTest.java
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@ -33,6 +33,7 @@ import org.eclipse.cdt.core.parser.ast.IASTTemplateSpecialization;
import org.eclipse.cdt.core.parser.ast.IASTTypedefDeclaration;
import org.eclipse.cdt.core.parser.ast.IASTVariable;
import org.eclipse.cdt.internal.core.parser.ParserException;
import org.eclipse.cdt.internal.core.parser.pst.ParserSymbolTableError;
/**
* @author aniefer
@ -967,4 +968,13 @@ public class CompleteParseASTTemplateTest extends CompleteParseBaseTest {
parent = (IASTBaseSpecifier) A3.getBaseClauses().next();
assertEquals( parent.getParentClassSpecifier(), A2 );
}
public void testBug64939() throws Exception
{
try{
parse( "template < class T > class A : public A< T * > {}; A<int> a;" ).getDeclarations(); //NON-NLS-1$
assertTrue( false );
} catch ( ParserSymbolTableError e ){
}
}
}

2
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/parser/IProblem.java
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@ -429,4 +429,6 @@ public interface IProblem
public static final int SEMANTIC_MALFORMED_EXPRESSION = SEMANTICS_RELATED | 0x010;
public static final int SEMANTIC_ILLFORMED_FRIEND = SEMANTICS_RELATED | 0x011;
public static final int SEMANTIC_RECURSIVE_TEMPLATE_INSTANTIATION = SEMANTICS_RELATED | 0x012;
}

1
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ParserMessages.properties
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@ -63,3 +63,4 @@ ASTProblemFactory.error.semantic.pst.unableToResolveFunction=Unable to resolve f
ASTProblemFactory.error.semantic.pst.invalidTemplateArgument=Invalid template argument: {0}
ASTProblemFactory.error.semantic.pst.invalidTemplateParameter=Invalid template parameter: {0}
ASTProblemFactory.error.semantic.pst.redeclaredTemplateParameter=Redeclaration of template parameter: {0}
ASTProblemFactory.error.semantic.pst.recursiveTemplateInstantiation=Possible infinite recursive loop encountered while instantiating {0}

3
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/problem/Problem.java
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@ -145,6 +145,9 @@ public class Problem implements IProblem {
errorMessages.put(
new Integer( IProblem.SEMANTIC_REDECLARED_TEMPLATE_PARAMETER ),
ParserMessages.getString("ASTProblemFactory.error.semantic.pst.redeclaredTemplateParameter")); //$NON-NLS-1$
errorMessages.put(
new Integer( IProblem.SEMANTIC_RECURSIVE_TEMPLATE_INSTANTIATION ),
ParserMessages.getString("ASTProblemFactory.error.semantic.pst.recursiveTemplateInstantiation")); //$NON-NLS-1$
errorMessages.put(
new Integer(IProblem.PREPROCESSOR_POUND_ERROR),
ParserMessages.getString("ScannerProblemFactory.error.preproc.error")); //$NON-NLS-1$

1
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ITemplateSymbol.java
View file

@ -67,6 +67,7 @@ public interface ITemplateSymbol extends IParameterizedSymbol {
* @param kind
*/
public void registerDeferredInstatiation( Object obj0, Object obj1, DeferredKind kind, Map argMap );
public int getNumberDeferredInstantiations();
public static class DeferredKind{
private DeferredKind( int v ){

1
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTable.java
View file

@ -40,6 +40,7 @@ import org.eclipse.cdt.internal.core.parser.pst.TypeInfo.PtrOp;
public class ParserSymbolTable {
public static final int TYPE_LOOP_THRESHOLD = 50;
public static final int TEMPLATE_LOOP_THRESHOLD = 10;
public static final String EMPTY_NAME = ""; //$NON-NLS-1$
public static final String THIS = "this"; //$NON-NLS-1$

4
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTableException.java
View file

@ -45,7 +45,9 @@ public class ParserSymbolTableException extends Exception {
public static final int r_BadTemplateArgument = 8;
public static final int r_BadTemplateParameter = 9;
public static final int r_RedeclaredTemplateParam = 10;
public static final int r_RecursiveTemplate = 11;
public int reason = -1;
/**
* @return
*/
@ -74,6 +76,8 @@ public class ParserSymbolTableException extends Exception {
return IProblem.SEMANTIC_INVALID_TEMPLATE_PARAMETER;
case r_RedeclaredTemplateParam:
return IProblem.SEMANTIC_REDECLARED_TEMPLATE_PARAMETER;
case r_RecursiveTemplate:
return IProblem.SEMANTIC_RECURSIVE_TEMPLATE_INSTANTIATION;
default:
// assert false : this;
return -1;

24
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/TemplateSymbol.java
View file

@ -421,14 +421,23 @@ public class TemplateSymbol extends ParameterizedSymbol implements ITemplateSymb
_deferredInstantiations.add( new Object [] { obj0, obj1, kind, argMap } );
}
public int getNumberDeferredInstantiations(){
return _deferredInstantiations.size();
}
protected void processDeferredInstantiations() throws ParserSymbolTableException{
if( _deferredInstantiations == Collections.EMPTY_LIST )
return;
int size = _deferredInstantiations.size();
for( int i = 0; i < size; i++ ){
Object [] objs = (Object [])_deferredInstantiations.get(i);
if( _processingDeferred ){
return;
}
_processingDeferred = true;
int numDeferred = _deferredInstantiations.size();
int loopCount = 0;
while( numDeferred > 0 ){
while( numDeferred > 0 ) {
Object [] objs = (Object [])_deferredInstantiations.get(0);
DeferredKind kind = (DeferredKind) objs[2];
@ -441,7 +450,15 @@ public class TemplateSymbol extends ParameterizedSymbol implements ITemplateSymb
} else if( kind == DeferredKind.TYPE_SYMBOL ){
TemplateEngine.instantiateDeferredTypeInfo( (TypeInfo) objs[0], this, (Map) objs[3] );
}
_deferredInstantiations.remove( 0 );
numDeferred--;
}
numDeferred = _deferredInstantiations.size();
if( ++loopCount > ParserSymbolTable.TEMPLATE_LOOP_THRESHOLD )
throw new ParserSymbolTableException( ParserSymbolTableException.r_RecursiveTemplate );
}
_processingDeferred = false;
}
private List _specializations = Collections.EMPTY_LIST; //template specializations
@ -449,6 +466,7 @@ public class TemplateSymbol extends ParameterizedSymbol implements ITemplateSymb
private Map _defnParameterMap = Collections.EMPTY_MAP; //members could be defined with different template parameter names
private Map _instantiations = Collections.EMPTY_MAP;
private List _deferredInstantiations = Collections.EMPTY_LIST; //used to avoid recursive loop
private boolean _processingDeferred = false;
}