diff --git a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
index d41c827b0..54d69c634 100644
--- a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
+++ b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebugger.java
@@ -4,9 +4,7 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
-import java.util.concurrent.Exchanger;
+import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicInteger;
 import org.codehaus.jackson.JsonNode;
 import org.codehaus.jackson.map.ObjectMapper;
@@ -277,26 +275,47 @@ public class ChromeRDPDebugger implements JavaScriptDebugger, ChromeRDPExchangeC
         params.setObjectId(scopeId);
         params.setOwnProperties(true);
         message.setParams(mapper.valueToTree(params));
-        final Exchanger<List<RDPLocalVariable>> exchanger = new Exchanger<>();
+        final BlockingQueue<List<RDPLocalVariable>> sync = new LinkedTransferQueue<>();
         responseHandlers.put(message.getId(), new ResponseHandler() {
             @Override public void received(JsonNode node) throws IOException {
                 GetPropertiesResponse response = mapper.reader(GetPropertiesResponse.class).readValue(node);
-                // TODO: parse response
-                try {
-                    exchanger.exchange(new ArrayList<RDPLocalVariable>());
-                } catch (InterruptedException e) {
-                    throw new RuntimeException(e);
-                }
+                sync.add(parseProperties(response.getResult()));
             }
         });
         sendMessage(message);
         try {
-            return exchanger.exchange(null);
+            return sync.take();
         } catch (InterruptedException e) {
             return Collections.emptyList();
         }
     }
 
+    private List<RDPLocalVariable> parseProperties(PropertyDescriptorDTO[] properties) {
+        List<RDPLocalVariable> variables = new ArrayList<>();
+        if (properties != null) {
+            for (PropertyDescriptorDTO property : properties) {
+                RemoteObjectDTO remoteValue = property.getValue();
+                RDPValue value;
+                switch (remoteValue.getType()) {
+                    case "undefined":
+                        value = new RDPValue("undefined");
+                        break;
+                    case "object":
+                    case "function":
+                        value = new RDPValue(remoteValue.getObjectId());
+                        break;
+                    default:
+                        value = new RDPValue(remoteValue.getValue().asText());
+                        break;
+                }
+
+                RDPLocalVariable var = new RDPLocalVariable(property.getName(), value);
+                variables.add(var);
+            }
+        }
+        return variables;
+    }
+
     private <T> T parseJson(Class<T> type, JsonNode node) throws IOException {
         return mapper.reader(type).readValue(node);
     }
@@ -316,7 +335,7 @@ public class ChromeRDPDebugger implements JavaScriptDebugger, ChromeRDPExchangeC
         String scopeId = null;
         for (ScopeDTO scope : dto.getScopeChain()) {
             if (scope.getType().equals("local")) {
-                scopeId = scope.getObject();
+                scopeId = scope.getObject().getObjectId();
                 break;
             }
         }
diff --git a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/data/ScopeDTO.java b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/data/ScopeDTO.java
index fda09c677..7bb6e3e2d 100644
--- a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/data/ScopeDTO.java
+++ b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/data/ScopeDTO.java
@@ -8,14 +8,14 @@ import org.codehaus.jackson.annotate.JsonIgnoreProperties;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class ScopeDTO {
-    private String object;
+    private RemoteObjectDTO object;
     private String type;
 
-    public String getObject() {
+    public RemoteObjectDTO getObject() {
         return object;
     }
 
-    public void setObject(String object) {
+    public void setObject(RemoteObjectDTO object) {
         this.object = object;
     }
 
diff --git a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/messages/GetPropertiesResponse.java b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/messages/GetPropertiesResponse.java
index 509cc4324..6c8e3be9a 100644
--- a/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/messages/GetPropertiesResponse.java
+++ b/teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/messages/GetPropertiesResponse.java
@@ -9,13 +9,13 @@ import org.teavm.chromerdp.data.PropertyDescriptorDTO;
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class GetPropertiesResponse {
-    private PropertyDescriptorDTO[] properties;
+    private PropertyDescriptorDTO[] result;
 
-    public PropertyDescriptorDTO[] getProperties() {
-        return properties;
+    public PropertyDescriptorDTO[] getResult() {
+        return result;
     }
 
-    public void setProperties(PropertyDescriptorDTO[] properties) {
-        this.properties = properties;
+    public void setResult(PropertyDescriptorDTO[] properties) {
+        this.result = properties;
     }
 }
diff --git a/teavm-core/src/main/java/org/teavm/debugging/CallFrame.java b/teavm-core/src/main/java/org/teavm/debugging/CallFrame.java
index 80a51b764..5fdc7a473 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/CallFrame.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/CallFrame.java
@@ -26,9 +26,9 @@ import org.teavm.model.MethodReference;
 public class CallFrame {
     private SourceLocation location;
     private MethodReference method;
-    private Map<String, LocalVariable> variables;
+    private Map<String, Variable> variables;
 
-    CallFrame(SourceLocation location, MethodReference method, Map<String, LocalVariable> variables) {
+    CallFrame(SourceLocation location, MethodReference method, Map<String, Variable> variables) {
         this.location = location;
         this.method = method;
         this.variables = Collections.unmodifiableMap(variables);
@@ -42,7 +42,7 @@ public class CallFrame {
         return method;
     }
 
-    public Map<String, LocalVariable> getVariables() {
+    public Map<String, Variable> getVariables() {
         return variables;
     }
 }
diff --git a/teavm-core/src/main/java/org/teavm/debugging/DebugInformationReader.java b/teavm-core/src/main/java/org/teavm/debugging/DebugInformationReader.java
index d37249026..649189794 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/DebugInformationReader.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/DebugInformationReader.java
@@ -50,12 +50,10 @@ class DebugInformationReader {
     private DebugInformation.Mapping[] readVariableMappings(int count) throws IOException {
         DebugInformation.Mapping[] mappings = new DebugInformation.Mapping[count];
         int varCount = readUnsignedNumber();
+        int lastVar = 0;
         while (varCount-- > 0) {
-            int lastVar = 0;
-            for (int i = 0; i < mappings.length; ++i) {
-                lastVar += readUnsignedNumber();
-                mappings[lastVar] = readMapping();
-            }
+            lastVar += readUnsignedNumber();
+            mappings[lastVar] = readMapping();
         }
         return mappings;
     }
diff --git a/teavm-core/src/main/java/org/teavm/debugging/DebugInformationWriter.java b/teavm-core/src/main/java/org/teavm/debugging/DebugInformationWriter.java
index d1402c39d..c876ff0ad 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/DebugInformationWriter.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/DebugInformationWriter.java
@@ -40,12 +40,12 @@ class DebugInformationWriter {
         writeMapping(debugInfo.lineMapping);
         writeMapping(debugInfo.classMapping);
         writeMapping(debugInfo.methodMapping);
-        writeUnsignedNumber(nonNullVariableMappings(debugInfo));
         writeVariableMappings(debugInfo);
     }
 
     private void writeVariableMappings(DebugInformation debugInfo) throws IOException {
         int lastVar = 0;
+        writeUnsignedNumber(nonNullVariableMappings(debugInfo));
         for (int i = 0; i < debugInfo.variableMappings.length; ++i) {
             DebugInformation.Mapping mapping = debugInfo.variableMappings[i];
             if (mapping == null) {
diff --git a/teavm-core/src/main/java/org/teavm/debugging/Debugger.java b/teavm-core/src/main/java/org/teavm/debugging/Debugger.java
index eabab3b1b..c944f6c22 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/Debugger.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/Debugger.java
@@ -186,7 +186,8 @@ public class Debugger {
                 MethodReference method = !empty ? debugInformation.getMethodAt(jsFrame.getLocation().getLine(),
                         jsFrame.getLocation().getColumn()) : null;
                 if (!empty || !wasEmpty) {
-                    frames.add(new CallFrame(loc, method, new HashMap<String, LocalVariable>()));
+                    VariableMap vars = new VariableMap(jsFrame.getVariables(), this, jsFrame.getLocation());
+                    frames.add(new CallFrame(loc, method, vars));
                 }
                 wasEmpty = empty;
             }
@@ -279,6 +280,14 @@ public class Debugger {
         }
     }
 
+    public String mapVariable(String variable, JavaScriptLocation location) {
+        DebugInformation debugInfo = debugInformationMap.get(location.getScript());
+        if (debugInfo == null) {
+            return null;
+        }
+        return debugInfo.getVariableMeaningAt(location.getLine(), location.getColumn(), variable);
+    }
+
     private JavaScriptDebuggerListener javaScriptListener = new JavaScriptDebuggerListener() {
         @Override
         public void resumed() {
diff --git a/teavm-core/src/main/java/org/teavm/debugging/JavaScriptValue.java b/teavm-core/src/main/java/org/teavm/debugging/JavaScriptValue.java
index 7541f781b..e23989495 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/JavaScriptValue.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/JavaScriptValue.java
@@ -1,3 +1,18 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
 package org.teavm.debugging;
 
 import java.util.Map;
diff --git a/teavm-core/src/main/java/org/teavm/debugging/JavaScriptVariable.java b/teavm-core/src/main/java/org/teavm/debugging/JavaScriptVariable.java
index 511216f39..ff33c83c1 100644
--- a/teavm-core/src/main/java/org/teavm/debugging/JavaScriptVariable.java
+++ b/teavm-core/src/main/java/org/teavm/debugging/JavaScriptVariable.java
@@ -1,3 +1,18 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
 package org.teavm.debugging;
 
 /**
diff --git a/teavm-core/src/main/java/org/teavm/debugging/LocalVariable.java b/teavm-core/src/main/java/org/teavm/debugging/LocalVariable.java
deleted file mode 100644
index e98029b55..000000000
--- a/teavm-core/src/main/java/org/teavm/debugging/LocalVariable.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package org.teavm.debugging;
-
-/**
- *
- * @author Alexey Andreev <konsoletyper@gmail.com>
- */
-public class LocalVariable {
-    private String name;
-    private WatchedValue value;
-
-    LocalVariable(String name, WatchedValue value) {
-        this.name = name;
-        this.value = value;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public WatchedValue getValue() {
-        return value;
-    }
-}
diff --git a/teavm-core/src/main/java/org/teavm/debugging/SimpleValue.java b/teavm-core/src/main/java/org/teavm/debugging/SimpleValue.java
new file mode 100644
index 000000000..e977361ee
--- /dev/null
+++ b/teavm-core/src/main/java/org/teavm/debugging/SimpleValue.java
@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.debugging;
+
+import java.util.Collections;
+import java.util.Map;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+class SimpleValue extends Value {
+    private String representation;
+
+    public SimpleValue(String representation) {
+        this.representation = representation;
+    }
+
+    @Override
+    public String getRepresentation() {
+        return representation;
+    }
+
+    @Override
+    public Map<String, Variable> getProperties() {
+        return Collections.emptyMap();
+    }
+}
diff --git a/teavm-core/src/main/java/org/teavm/debugging/Value.java b/teavm-core/src/main/java/org/teavm/debugging/Value.java
new file mode 100644
index 000000000..3a768a141
--- /dev/null
+++ b/teavm-core/src/main/java/org/teavm/debugging/Value.java
@@ -0,0 +1,28 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.debugging;
+
+import java.util.Map;
+
+/**
+ *
+ * @author Alexey Andreev <konsoletyper@gmail.com>
+ */
+public abstract class Value {
+    public abstract String getRepresentation();
+
+    public abstract Map<String, Variable> getProperties();
+}
diff --git a/teavm-core/src/main/java/org/teavm/debugging/Variable.java b/teavm-core/src/main/java/org/teavm/debugging/Variable.java
new file mode 100644
index 000000000..1bb2bcab5
--- /dev/null
+++ b/teavm-core/src/main/java/org/teavm/debugging/Variable.java
@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.debugging;
+
+/**
+ *
+ * @author Alexey Andreev <konsoletyper@gmail.com>
+ */
+public class Variable {
+    private String name;
+    private Value value;
+
+    Variable(String name, Value value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Value getValue() {
+        return value;
+    }
+}
diff --git a/teavm-core/src/main/java/org/teavm/debugging/VariableMap.java b/teavm-core/src/main/java/org/teavm/debugging/VariableMap.java
new file mode 100644
index 000000000..cc53aa26e
--- /dev/null
+++ b/teavm-core/src/main/java/org/teavm/debugging/VariableMap.java
@@ -0,0 +1,74 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.teavm.debugging;
+
+import java.util.AbstractMap;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ *
+ * @author Alexey Andreev
+ */
+class VariableMap extends AbstractMap<String, Variable> {
+    private AtomicReference<Map<String, Variable>> backingMap = new AtomicReference<>();
+    private Map<String, JavaScriptVariable> jsVariables;
+    private Debugger debugger;
+    private JavaScriptLocation location;
+
+    public VariableMap(Map<String, JavaScriptVariable> jsVariables, Debugger debugger, JavaScriptLocation location) {
+        this.jsVariables = jsVariables;
+        this.debugger = debugger;
+        this.location = location;
+    }
+
+    @Override
+    public Set<Entry<String, Variable>> entrySet() {
+        updateBackingMap();
+        return backingMap.get().entrySet();
+    }
+
+    @Override
+    public Variable get(Object key) {
+        updateBackingMap();
+        return backingMap.get().get(key);
+    }
+
+    @Override
+    public int size() {
+        updateBackingMap();
+        return backingMap.get().size();
+    }
+
+    private void updateBackingMap() {
+        if (backingMap.get() != null) {
+            return;
+        }
+        Map<String, Variable> vars = new HashMap<>();
+        for (Map.Entry<String, JavaScriptVariable> entry : jsVariables.entrySet()) {
+            JavaScriptVariable jsVar = entry.getValue();
+            String name = debugger.mapVariable(entry.getKey(), location);
+            if (name == null) {
+                continue;
+            }
+            SimpleValue value = new SimpleValue(jsVar.getValue().getRepresentation());
+            vars.put(entry.getKey(), new Variable(name, value));
+        }
+        backingMap.compareAndSet(null, vars);
+    }
+}
diff --git a/teavm-core/src/main/java/org/teavm/debugging/WatchedValue.java b/teavm-core/src/main/java/org/teavm/debugging/WatchedValue.java
deleted file mode 100644
index bf44a8410..000000000
--- a/teavm-core/src/main/java/org/teavm/debugging/WatchedValue.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package org.teavm.debugging;
-
-import java.util.Map;
-
-/**
- *
- * @author Alexey Andreev <konsoletyper@gmail.com>
- */
-public abstract class WatchedValue {
-    public abstract String getRepresentation();
-
-    public abstract Map<String, LocalVariable> getProperties();
-}
diff --git a/teavm-core/src/main/java/org/teavm/parsing/ProgramParser.java b/teavm-core/src/main/java/org/teavm/parsing/ProgramParser.java
index c18cb3fee..c6cad5fa5 100644
--- a/teavm-core/src/main/java/org/teavm/parsing/ProgramParser.java
+++ b/teavm-core/src/main/java/org/teavm/parsing/ProgramParser.java
@@ -119,13 +119,16 @@ public class ProgramParser implements VariableDebugInformation {
         while (program.variableCount() <= signatureVars) {
             program.createVariable(getVariableDebugName(program.variableCount(), 0));
         }
-        for (int i = 0; i < signatureVars; ++i) {
+        for (int i = 0; i <= signatureVars; ++i) {
             parameterNames.put(i, getVariableDebugName(i, 0));
         }
         return program;
     }
 
     private String getVariableDebugName(int var, int location) {
+        if (var < 0) {
+            return null;
+        }
         List<LocalVariableNode> nodes = localVariableMap.get(var);
         if (nodes == null) {
             return null;
@@ -293,10 +296,13 @@ public class ProgramParser implements VariableDebugInformation {
         DefinitionExtractor defExtractor = new DefinitionExtractor();
         for (int i = 0; i < targetInstructions.size(); ++i) {
             List<Instruction> instructionList = targetInstructions.get(i);
+            if (instructionList == null) {
+                continue;
+            }
             for (Instruction insn : instructionList) {
                 insn.acceptVisitor(defExtractor);
                 for (Variable var : defExtractor.getDefinedVariables()) {
-                    String debugName = getVariableDebugName(var.getIndex(), i);
+                    String debugName = getVariableDebugName(var.getIndex() - minLocal, i);
                     if (debugName != null) {
                         variableDebugNames.put(insn, debugName);
                     }
diff --git a/teavm-core/src/main/java/org/teavm/parsing/VariableDebugInformation.java b/teavm-core/src/main/java/org/teavm/parsing/VariableDebugInformation.java
index db11c723e..55fcda47a 100644
--- a/teavm-core/src/main/java/org/teavm/parsing/VariableDebugInformation.java
+++ b/teavm-core/src/main/java/org/teavm/parsing/VariableDebugInformation.java
@@ -1,3 +1,18 @@
+/*
+ *  Copyright 2014 Alexey Andreev.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
 package org.teavm.parsing;
 
 import org.teavm.model.Instruction;