Experimental execution of AS1/2 in FFDec Flash viewer (very basic, needs testing and many improvements)

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/ActionScriptFunction.java

@@ -15,6 +15,14 @@ public class ActionScriptFunction extends ActionScriptObject {
     protected List<String> paramNames;
     protected Map<Integer, String> funcRegNames;
 
+    public String getFunctionName() {
+        return functionName;
+    }
+
+    public Map<Integer, String> getFuncRegNames() {
+        return funcRegNames;
+    }
+
     public ActionScriptFunction(long functionOffset, long functionLength, String functionName, List<String> paramNames, Map<Integer, String> funcRegNames) {
         this.functionOffset = functionOffset;
         this.functionLength = functionLength;
@@ -23,11 +31,6 @@ public class ActionScriptFunction extends ActionScriptObject {
         this.funcRegNames = funcRegNames;
     }
 
-    public Object execute(Object thisObj, List<Object> args) {
-        //TODO!!!
-        return null;
-    }
-
     public long getFunctionLength() {
         return functionLength;
     }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/DisplayObject.java

@@ -1,6 +1,8 @@
 package com.jpexs.decompiler.flash.action;
 
+import com.jpexs.decompiler.flash.ecma.Undefined;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -54,6 +56,11 @@ public class DisplayObject extends ActionScriptObject {
         paused = false;
     }
 
+    public Object callFunction(long functionAddress, long functionLength, List<Object> args, Map<Integer, String> regNames, Object thisObj) {
+        //TODO
+        return Undefined.INSTANCE;
+    }
+
     public void callFrame(int frame) {
         //TODO
     }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/LocalDataArea.java

@@ -35,7 +35,7 @@ public class LocalDataArea {
 
     public Stack<Object> stack = new Stack<>();
 
-    public List<Object> functions = new ArrayList<>();
+    public List<ActionScriptFunction> functions = new ArrayList<>();
 
     public Map<String, Object> localVariables = new HashMap<>();
 
@@ -70,6 +70,9 @@ public class LocalDataArea {
         constantPool = null;
         stack.clear();
         localVariables.clear();
+        localRegisters.clear();
+        withs.clear();
+        functions.clear();
         jump = null;
         returnValue = null;
         executionException = null;

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/special/ActionEnd.java

@@ -18,6 +18,7 @@ package com.jpexs.decompiler.flash.action.special;
 
 import com.jpexs.decompiler.flash.action.Action;
 import com.jpexs.decompiler.flash.action.LocalDataArea;
+import com.jpexs.decompiler.flash.ecma.Undefined;
 import com.jpexs.decompiler.graph.GraphSourceItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
 import com.jpexs.decompiler.graph.TranslateStack;
@@ -47,6 +48,7 @@ public class ActionEnd extends Action {
 
     @Override
     public boolean execute(LocalDataArea lda) {
+        lda.returnValue = Undefined.INSTANCE;
         return true;
     }
 

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionCallFunction.java

@@ -18,8 +18,11 @@ package com.jpexs.decompiler.flash.action.swf5;
 
 import com.jpexs.decompiler.flash.BaseLocalData;
 import com.jpexs.decompiler.flash.action.Action;
+import com.jpexs.decompiler.flash.action.ActionScriptFunction;
 import com.jpexs.decompiler.flash.action.LocalDataArea;
 import com.jpexs.decompiler.flash.action.model.CallFunctionActionItem;
+import com.jpexs.decompiler.flash.ecma.Null;
+import com.jpexs.decompiler.flash.ecma.Undefined;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.decompiler.graph.GraphSourceItem;
 import com.jpexs.decompiler.graph.GraphTargetItem;
@@ -47,6 +50,19 @@ public class ActionCallFunction extends Action {
 
     @Override
     public boolean execute(LocalDataArea lda) {
+
+        String functionName = lda.popAsString();
+        int numArgs = (int) (double) lda.popAsNumber();
+        List<Object> args = new ArrayList<>();
+        for (int i = 0; i < numArgs; i++) {
+            args.add(lda.pop());
+        }
+        for (ActionScriptFunction f : lda.functions) {
+            if (functionName.equals(f.getFunctionName())) {
+                lda.stack.push(lda.stage.callFunction(f.getFunctionOffset(), f.getFunctionLength(), args, f.getFuncRegNames(), Undefined.INSTANCE /*?*/));
+                return true;
+            }
+        }
         return true;
     }
 

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionCallMethod.java

@@ -62,7 +62,9 @@ public class ActionCallMethod extends Action {
             args.add(lda.pop());
         }
 
-        lda.stack.push(((ActionScriptFunction) obj.getMember(methodName)).execute(obj, args));
+        ActionScriptFunction f = (ActionScriptFunction) obj.getMember(methodName);
+
+        lda.stack.push(lda.stage.callFunction(f.getFunctionOffset(), f.getFunctionLength(), args, f.getFuncRegNames(), obj));
         return true;
     }
 

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionNewMethod.java

@@ -62,8 +62,8 @@ public class ActionNewMethod extends Action {
             args.add(lda.pop());
         }
         ActionScriptObject nobj = new ActionScriptObject();
-
-        ((ActionScriptFunction) obj.getMember(methodName)).execute(nobj, args);
+        ActionScriptFunction f = (ActionScriptFunction) obj.getMember(methodName);
+        lda.stage.callFunction(f.getFunctionOffset(), f.getFunctionLength(), args, f.getFuncRegNames(), nobj);
         lda.stack.push(nobj);
         return true;
     }

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/swf5/ActionNewObject.java

@@ -63,7 +63,7 @@ public class ActionNewObject extends Action {
         ActionScriptObject obj = new ActionScriptObject();
         //TODO:check type        
         ActionScriptFunction constructor = (ActionScriptFunction) lda.stage.getMember(objectName);
-        constructor.execute(obj, args);
+        lda.stage.callFunction(constructor.getFunctionOffset(), constructor.getFunctionLength(), args, constructor.getFuncRegNames(), obj);
         lda.stack.push(obj);
         return true;
     }