X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=Robust%2Fsrc%2FIR%2FTypeUtil.java;h=d289a9535e8d20ba2956d174d2826fbc65460b41;hb=3ed159976d22ddaf99cec81365e7f913b97c4bbc;hp=981a098da102bc556f61196ae1d1b82b77c1f41e;hpb=ebc35d5dd596636b70848ff97ed061058ddddd75;p=IRC.git

diff --git a/Robust/src/IR/TypeUtil.java b/Robust/src/IR/TypeUtil.java
index 981a098d..d289a953 100644
--- a/Robust/src/IR/TypeUtil.java
+++ b/Robust/src/IR/TypeUtil.java
@@ -1,200 +1,338 @@
 package IR;
 import java.util.*;
+import IR.Tree.*;
+import java.io.File;
+import Main.Main;
 
 public class TypeUtil {
-    public static final String StringClass="String";
-    public static final String ObjectClass="Object";
-    public static final String StartupClass="StartupObject";
-    public static final String TagClass="TagDescriptor";
-    State state;
-    Hashtable supertable;
-    Hashtable subclasstable;
-
-    public TypeUtil(State state) {
-	this.state=state;
-	createTables();
-    }
+  public static final String StringClass="String";
+  public static final String ObjectClass="Object";
+  public static final String StartupClass="StartupObject";
+  public static final String TagClass="TagDescriptor";
+  public static final String ThreadClass="Thread";
+  public static final String TaskClass="Task";
+  State state;
+  Hashtable supertable;
+  Hashtable subclasstable;
+  BuildIR bir;
 
-    public ClassDescriptor getClass(String classname) {
-	ClassDescriptor cd=(ClassDescriptor)state.getClassSymbolTable().get(classname);
-	return cd;
-    }
+  public TypeUtil(State state, BuildIR bir) {
+    this.state=state;
+    this.bir=bir;
+    createTables();
+  }
 
-    private void createTables() {
-	supertable=new Hashtable();
-
-	Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
-	while(classit.hasNext()) {
-	    ClassDescriptor cd=(ClassDescriptor)classit.next();
-	    String superc=cd.getSuper();
-	    if (superc!=null) {
-		ClassDescriptor cd_super=getClass(superc);
-		supertable.put(cd,cd_super);
-	    }
+  public void addNewClass(String cl, Set todo) {
+    for(int i=0;i<state.classpath.size();i++) {
+      String path=(String)state.classpath.get(i);
+      File f=new File(path, cl+".java");
+      if (f.exists()) {
+	try {
+	  ParseNode pn=Main.readSourceFile(state, f.getCanonicalPath());
+	  bir.buildtree(pn, todo);
+	  return;
+	} catch (Exception e) {
+	  throw new Error(e);
 	}
+      }
     }
+    throw new Error("Couldn't find class "+cl);
+  }
 
-    public ClassDescriptor getMainClass() {
-	return getClass(state.main);
-    }
 
-    public MethodDescriptor getMain() {
-	ClassDescriptor cd=getMainClass();
-	Set mainset=cd.getMethodTable().getSet("main");
-	for(Iterator mainit=mainset.iterator();mainit.hasNext();) {
-	    MethodDescriptor md=(MethodDescriptor)mainit.next();
-	    if (md.numParameters()!=1)
-		continue;
-	    Descriptor pd=md.getParameter(0);
-	    TypeDescriptor tpd=(pd instanceof TagVarDescriptor)?((TagVarDescriptor)pd).getType():((VarDescriptor)pd)
-		.getType();
-	    if (tpd.getArrayCount()!=1)
-		continue;
-	    if (!tpd.getSymbol().equals("String"))
-		continue;
-	    
-	    if (!md.getModifiers().isStatic())
-		throw new Error("Error: Non static main");
-	    return md;
-	}
-	throw new Error(cd+" has no main");
+
+  public ClassDescriptor getClass(String classname) {
+    ClassDescriptor cd=(ClassDescriptor)state.getClassSymbolTable().get(classname);
+    return cd;
+  }
+
+  public ClassDescriptor getClass(String classname, HashSet todo) {
+    ClassDescriptor cd=(ClassDescriptor)state.getClassSymbolTable().get(classname);
+    if (cd==null) {
+      //have to find class
+      addNewClass(classname, todo);
+      cd=(ClassDescriptor)state.getClassSymbolTable().get(classname);
+
+      System.out.println("Build class:"+cd);
+      todo.add(cd);
+    }
+    if (!supertable.containsKey(cd)) {
+      String superc=cd.getSuper();
+      if (superc!=null) {
+	ClassDescriptor cd_super=getClass(superc, todo);
+	supertable.put(cd,cd_super);
+      }
     }
+    return cd;
+  }
 
-    public void createFullTable() {
-	subclasstable=new Hashtable();
-    
-	Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
-	while(classit.hasNext()) {
-	    ClassDescriptor cd=(ClassDescriptor)classit.next();
-	    ClassDescriptor tmp=cd.getSuperDesc();
-	    
-	    while(tmp!=null) {
-		if (!subclasstable.containsKey(tmp))
-		    subclasstable.put(tmp,new HashSet());
-		HashSet hs=(HashSet)subclasstable.get(tmp);
-		hs.add(cd);
-		tmp=tmp.getSuperDesc();
-	    }
-	}
+  private void createTables() {
+    supertable=new Hashtable();
+  }
+
+  public ClassDescriptor getMainClass() {
+    return getClass(state.main);
+  }
+
+  public MethodDescriptor getRun() {
+    ClassDescriptor cd=getClass(TypeUtil.ThreadClass);
+    for(Iterator methodit=cd.getMethodTable().getSet("run").iterator(); methodit.hasNext();) {
+      MethodDescriptor md=(MethodDescriptor) methodit.next();
+      if (md.numParameters()!=0||md.getModifiers().isStatic())
+	continue;
+      return md;
     }
+    throw new Error("Can't find Thread.run");
+  }
+  
+  public MethodDescriptor getExecute() {
+    ClassDescriptor cd = getClass(TypeUtil.TaskClass);
+
+    if(cd == null && state.DSMTASK)
+      throw new Error("Task.java is not included");
 
-    public Set getSubClasses(ClassDescriptor cd) {
-	return (Set)subclasstable.get(cd);
+    for(Iterator methodit = cd.getMethodTable().getSet("execute").iterator(); methodit.hasNext();) {
+      MethodDescriptor md = (MethodDescriptor) methodit.next();
+      if (md.numParameters()!=0 || md.getModifiers().isStatic())
+        continue;
+      return md;
     }
+    throw new Error("Can't find Task.execute");
+  }
 
-    public ClassDescriptor getSuper(ClassDescriptor cd) {
-	return (ClassDescriptor)supertable.get(cd);
+
+  public MethodDescriptor getMain() {
+    ClassDescriptor cd=getMainClass();
+    Set mainset=cd.getMethodTable().getSet("main");
+    for(Iterator mainit=mainset.iterator(); mainit.hasNext();) {
+      MethodDescriptor md=(MethodDescriptor)mainit.next();
+      if (md.numParameters()!=1)
+	continue;
+      Descriptor pd=md.getParameter(0);
+      TypeDescriptor tpd=(pd instanceof TagVarDescriptor) ? ((TagVarDescriptor)pd).getType() : ((VarDescriptor)pd)
+                          .getType();
+      if (tpd.getArrayCount()!=1)
+	continue;
+      if (!tpd.getSymbol().equals("String"))
+	continue;
+
+      if (!md.getModifiers().isStatic())
+	throw new Error("Error: Non static main");
+      return md;
     }
+    throw new Error(cd+" has no main");
+  }
+
+  /** Check to see if md1 is more specific than md2...  Informally
+      if md2 could always be called given the arguments passed into
+      md1 */
 
-    public boolean isCastable(TypeDescriptor original, TypeDescriptor casttype) {
-	if (original.isChar()&&
-	    (casttype.isByte()||
-	     casttype.isShort()))
-	    return true;
-
-	if (casttype.isChar()&&
-	    (original.isByte()||
-	     original.isShort()||
-	     original.isInt()||
-	     original.isLong()||
-	     original.isFloat()||
-	     original.isDouble()))
-	    return true;
-	    
+  public boolean isMoreSpecific(MethodDescriptor md1, MethodDescriptor md2) {
+    /* Checks if md1 is more specific than md2 */
+    if (md1.numParameters()!=md2.numParameters())
+      throw new Error();
+    for(int i=0; i<md1.numParameters(); i++) {
+      if (!this.isSuperorType(md2.getParamType(i), md1.getParamType(i)))
 	return false;
     }
+    if (md1.getReturnType()==null||md2.getReturnType()==null) {
+	if (md1.getReturnType()!=md2.getReturnType())
+	    return false;
+    } else
+	if (!this.isSuperorType(md2.getReturnType(), md1.getReturnType()))
+	    return false;
 
-    public boolean isSuperorType(TypeDescriptor possiblesuper, TypeDescriptor cd2) {
-	//Matching type are always okay
-	if (possiblesuper.equals(cd2))
-	    return true;
+    if (!this.isSuperorType(md2.getClassDesc(), md1.getClassDesc()))
+      return false;
 
-	if ((possiblesuper.isTag() && !cd2.isTag())||
-	    (!possiblesuper.isTag() && cd2.isTag()))
-	    return false;
+    return true;
+  }
 
-	//Handle arrays
-	if (cd2.isArray()||possiblesuper.isArray()) {
-	    // Object is super class of all arrays
-	    if (possiblesuper.getSymbol().equals(ObjectClass)&&!possiblesuper.isArray())
-		return true;
+  public MethodDescriptor getMethod(ClassDescriptor cd, String name, TypeDescriptor[] types) {
+    Set methoddescriptorset=cd.getMethodTable().getSet(name);
+    MethodDescriptor bestmd=null;
+NextMethod:
+    for(Iterator methodit=methoddescriptorset.iterator(); methodit.hasNext();) {
+      MethodDescriptor currmd=(MethodDescriptor)methodit.next();
+      /* Need correct number of parameters */
+      if (types.length!=currmd.numParameters())
+	continue;
+      for(int i=0; i<types.length; i++) {
+	if (!this.isSuperorType(currmd.getParamType(i),types[i]))
+	  continue NextMethod;
+      }
+      /* Method okay so far */
+      if (bestmd==null)
+	bestmd=currmd;
+      else {
+	if (isMoreSpecific(currmd,bestmd)) {
+	  bestmd=currmd;
+	} else if (!isMoreSpecific(bestmd, currmd))
+	  throw new Error("No method is most specific");
 
-	    // If we have the same dimensionality of arrays & both are classes, we can default to the normal test
-	    if (cd2.isClass()&&possiblesuper.isClass()
-		&&(possiblesuper.getArrayCount()==cd2.getArrayCount())&&
-		isSuperorType(possiblesuper.getClassDesc(), cd2.getClassDesc()))
-		return true;
+	/* Is this more specific than bestmd */
+      }
+    }
+    if (bestmd==null)
+      throw new Error("Could find: "+name + " in "+cd);
 
-	    // Object is superclass of all array classes
-	    if (possiblesuper.getSymbol().equals(ObjectClass)&&cd2.isClass()
-		&&(possiblesuper.getArrayCount()<cd2.getArrayCount()))
-		return true;
+    return bestmd;
+  }
 
-	    return false;
-	}
+  public void createFullTable() {
+    subclasstable=new Hashtable();
 
-	if (possiblesuper.isClass()&&
-	     cd2.isClass())
-	    return isSuperorType(possiblesuper.getClassDesc(), cd2.getClassDesc());
-	else if (possiblesuper.isClass()&&
-		 cd2.isNull())
-	    return true;
-	else if (possiblesuper.isNull())
-	    throw new Error(); //not sure when this case would occur
-	else if (possiblesuper.isPrimitive()&&
-		 cd2.isPrimitive()) {
-	    ///Primitive widenings from 5.1.2
-	    if (cd2.isByte()&&(possiblesuper.isByte()||possiblesuper.isShort()||
-			       possiblesuper.isInt()||possiblesuper.isLong()||
-			       possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isShort()&&(possiblesuper.isShort()||
-				possiblesuper.isInt()||possiblesuper.isLong()||
-				possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isChar()&&(possiblesuper.isChar()||
-			       possiblesuper.isInt()||possiblesuper.isLong()||
-			       possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isInt()&&(possiblesuper.isInt()||possiblesuper.isLong()||
-			      possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isLong()&&(possiblesuper.isLong()||
-			       possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isFloat()&&(possiblesuper.isFloat()||possiblesuper.isDouble()))
-		return true;
-	    if (cd2.isDouble()&&possiblesuper.isDouble())
-		
-		return true;
-	    if (cd2.isBoolean()&&possiblesuper.isBoolean())
-		return true;
-	    
-	    return false;
-	} else if (possiblesuper.isPrimitive()&&(!possiblesuper.isArray())&&
-		   (cd2.isArray()||cd2.isPtr()))
-	    return false;
-	else if (cd2.isPrimitive()&&(!cd2.isArray())&&
-		 (possiblesuper.isArray()||possiblesuper.isPtr()))
-	    return false;
-	else
-	    throw new Error("Case not handled:"+possiblesuper+" "+cd2);
+    Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
+    while(classit.hasNext()) {
+      ClassDescriptor cd=(ClassDescriptor)classit.next();
+      ClassDescriptor tmp=cd.getSuperDesc();
+
+      while(tmp!=null) {
+	if (!subclasstable.containsKey(tmp))
+	  subclasstable.put(tmp,new HashSet());
+	HashSet hs=(HashSet)subclasstable.get(tmp);
+	hs.add(cd);
+	tmp=tmp.getSuperDesc();
+      }
     }
+  }
+
+  public Set getSubClasses(ClassDescriptor cd) {
+    return (Set)subclasstable.get(cd);
+  }
+
+  public ClassDescriptor getSuper(ClassDescriptor cd) {
+    return (ClassDescriptor)supertable.get(cd);
+  }
+
+  public boolean isCastable(TypeDescriptor original, TypeDescriptor casttype) {
+    if (original.isChar()&&
+        (casttype.isByte()||
+         casttype.isShort()))
+      return true;
+
+    if (casttype.isChar()&&
+        (original.isByte()||
+         original.isShort()||
+         original.isInt()||
+         original.isLong()||
+         original.isFloat()||
+         original.isDouble()))
+      return true;
+
+    return false;
+  }
+
+  public boolean isSuperorType(TypeDescriptor possiblesuper, TypeDescriptor cd2) {
+    if (possiblesuper.isOffset() || cd2.isOffset()) return true;
+    //Matching type are always okay
+    if (possiblesuper.equals(cd2))
+      return true;
+
+    if ((possiblesuper.isTag() && !cd2.isTag())||
+        (!possiblesuper.isTag() && cd2.isTag()))
+      return false;
+
+    //Handle arrays
+    if (cd2.isArray()||possiblesuper.isArray()) {
+      // Object is super class of all arrays
+      if (possiblesuper.getSymbol().equals(ObjectClass)&&!possiblesuper.isArray())
+	return true;
+
+      // If we have the same dimensionality of arrays & both are classes, we can default to the normal test
+      if (cd2.isClass()&&possiblesuper.isClass()
+          &&(possiblesuper.getArrayCount()==cd2.getArrayCount())&&
+          isSuperorType(possiblesuper.getClassDesc(), cd2.getClassDesc()))
+	return true;
+
+      // Object is superclass of all array classes
+      if (possiblesuper.getSymbol().equals(ObjectClass)&&cd2.isClass()
+          &&(possiblesuper.getArrayCount()<cd2.getArrayCount()))
+	return true;
+
+      //Allow arraytype=null statements
+      if (possiblesuper.isArray()&&cd2.isNull())
+	return true;
 
-    
-    public boolean isSuperorType(ClassDescriptor possiblesuper, ClassDescriptor cd2) {
-	if (possiblesuper==cd2)
-	    return true;
-	else
-	    return isSuper(possiblesuper, cd2);
+      return false;
     }
 
-    private boolean isSuper(ClassDescriptor possiblesuper, ClassDescriptor cd2) {
-	while(cd2!=null) {
-	    cd2=getSuper(cd2);
-	    if (cd2==possiblesuper)
-		return true;
-	}
-	return false;
+    if (possiblesuper.isClass()&&
+        cd2.isClass())
+      return isSuperorType(possiblesuper.getClassDesc(), cd2.getClassDesc());
+    else if (possiblesuper.isClass()&&
+             cd2.isNull())
+      return true;
+    else if (possiblesuper.isNull())
+      throw new Error();       //not sure when this case would occur
+    else if (possiblesuper.isPrimitive()&&
+             cd2.isPrimitive()) {
+      ///Primitive widenings from 5.1.2
+      if (cd2.isByte()&&(possiblesuper.isByte()||possiblesuper.isShort()||
+                         possiblesuper.isInt()||possiblesuper.isLong()||
+                         possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isShort()&&(possiblesuper.isShort()||
+                          possiblesuper.isInt()||possiblesuper.isLong()||
+                          possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isChar()&&(possiblesuper.isChar()||
+                         possiblesuper.isInt()||possiblesuper.isLong()||
+                         possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isInt()&&(possiblesuper.isInt()||possiblesuper.isLong()||
+                        possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isLong()&&(possiblesuper.isLong()||
+                         possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isFloat()&&(possiblesuper.isFloat()||possiblesuper.isDouble()))
+	return true;
+      if (cd2.isDouble()&&possiblesuper.isDouble())
+
+	return true;
+      if (cd2.isBoolean()&&possiblesuper.isBoolean())
+	return true;
+
+      return false;
+    } else if (possiblesuper.isPrimitive()&&(!possiblesuper.isArray())&&
+               cd2.isPtr())
+      return false;
+    else if (cd2.isPrimitive()&&(!cd2.isArray())&&
+             possiblesuper.isPtr())
+      return false;
+    else
+      throw new Error("Case not handled:"+possiblesuper+" "+cd2);
+  }
+
+  public TypeDescriptor mostSpecific(TypeDescriptor td1, TypeDescriptor td2) {
+    if( isSuperorType( td1, td2 ) ) {
+      return td2;
+    }
+    if( isSuperorType( td2, td1 ) ) {
+      return td1;
+    }
+    throw new Error( td1+" and "+td2+" have no superclass relationship" );
+  }
+
+  public TypeDescriptor mostSpecific(TypeDescriptor td1, TypeDescriptor td2, TypeDescriptor td3) {
+    return mostSpecific( td1, mostSpecific( td2, td3 ) );
+  }
+
+  public boolean isSuperorType(ClassDescriptor possiblesuper, ClassDescriptor cd2) {
+    if (possiblesuper==cd2)
+      return true;
+    else
+      return isSuper(possiblesuper, cd2);
+  }
+
+  private boolean isSuper(ClassDescriptor possiblesuper, ClassDescriptor cd2) {
+
+    while(cd2!=null) {
+      cd2=getSuper(cd2);
+      if (cd2==possiblesuper)
+	return true;
     }
+    return false;
+  }
 }