core: fix inner class handling in classpath and signature parser

jadx-core/src/main/java/jadx/core/clsp/ClspGraph.java

@@ -5,6 +5,7 @@ import jadx.core.utils.exceptions.DecodeException;
 import jadx.core.utils.exceptions.JadxRuntimeException;
 
 import java.io.IOException;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -44,35 +45,47 @@ public class ClspGraph {
 			throw new JadxRuntimeException("Classpath must be loaded first");
 		}
 		int size = classes.size();
+		for (ClassNode cls : classes) {
+			size += cls.getInnerClasses().size();
+		}
 		NClass[] nClasses = new NClass[size];
-		for (int i = 0; i < size; i++) {
-			ClassNode cls = classes.get(i);
-			NClass nClass = new NClass(cls.getRawName(), -1);
-			nClasses[i] = nClass;
-			nameMap.put(cls.getRawName(), nClass);
+		int k = 0;
+		for (ClassNode cls : classes) {
+			nClasses[k++] = addClass(cls);
+			for (ClassNode inner : cls.getInnerClasses()) {
+				nClasses[k++] = addClass(inner);
+			}
 		}
 		for (int i = 0; i < size; i++) {
 			nClasses[i].setParents(ClsSet.makeParentsArray(classes.get(i), nameMap));
 		}
 	}
 
+	private NClass addClass(ClassNode cls) {
+		NClass nClass = new NClass(cls.getRawName(), -1);
+		nameMap.put(cls.getRawName(), nClass);
+		return nClass;
+	}
+
 	public boolean isImplements(String clsName, String implClsName) {
 		Set<String> anc = getAncestors(clsName);
 		return anc.contains(implClsName);
 	}
 
 	public String getCommonAncestor(String clsName, String implClsName) {
-		if (isImplements(clsName, implClsName)) {
-			return implClsName;
+		if (clsName.equals(implClsName)) {
+			return clsName;
 		}
-		Set<String> anc = getAncestors(clsName);
 		NClass cls = nameMap.get(implClsName);
 		if (cls != null) {
+			if (isImplements(clsName, implClsName)) {
+				return implClsName;
+			}
+			Set<String> anc = getAncestors(clsName);
 			return searchCommonParent(anc, cls);
-		} else {
-			LOG.debug("Missing class: {}", implClsName);
-			return null;
 		}
+		LOG.debug("Missing class: {}", implClsName);
+		return null;
 	}
 
 	private String searchCommonParent(Set<String> anc, NClass cls) {
@@ -92,17 +105,21 @@ public class ClspGraph {
 
 	private Set<String> getAncestors(String clsName) {
 		Set<String> result = ancestorCache.get(clsName);
-		if (result == null) {
+		if (result != null) {
+			return result;
+		}
+		NClass cls = nameMap.get(clsName);
+		if (cls != null) {
 			result = new HashSet<String>();
-			ancestorCache.put(clsName, result);
-			NClass cls = nameMap.get(clsName);
-			if (cls != null) {
-				addAncestorsNames(cls, result);
-			} else {
-				LOG.debug("Missing class: {}", clsName);
+			addAncestorsNames(cls, result);
+			if (result.isEmpty()) {
+				result = Collections.emptySet();
 			}
+			ancestorCache.put(clsName, result);
+			return result;
 		}
-		return result;
+		LOG.debug("Missing class: {}", clsName);
+		return Collections.emptySet();
 	}
 
 	private void addAncestorsNames(NClass cls, Set<String> result) {

jadx-core/src/main/java/jadx/core/dex/info/ClassInfo.java

@@ -72,7 +72,7 @@ public final class ClassInfo {
 
 		int sep = clsName.lastIndexOf('$');
 		if (canBeInner && sep > 0 && sep != clsName.length() - 1) {
-			String parClsName = pkg + '.' + clsName.substring(0, sep);
+			String parClsName = pkg + "." + clsName.substring(0, sep);
 			parentClass = fromName(parClsName);
 			clsName = clsName.substring(sep + 1);
 		} else {

jadx-core/src/main/java/jadx/core/dex/instructions/args/ArgType.java

@@ -180,6 +180,11 @@ public abstract class ArgType {
 		}
 
 		@Override
+		public boolean isGeneric() {
+			return true;
+		}
+
+		@Override
 		public ArgType getWildcardType() {
 			return type;
 		}
@@ -224,7 +229,7 @@ public abstract class ArgType {
 		}
 
 		public GenericObject(GenericObject outerType, String innerName, ArgType[] generics) {
-			super(outerType.getObject() + "." + innerName);
+			super(outerType.getObject() + "$" + innerName);
 			this.outerType = outerType;
 			this.generics = generics;
 			this.hash = outerType.hashCode() + 31 * innerName.hashCode()
@@ -232,6 +237,11 @@ public abstract class ArgType {
 		}
 
 		@Override
+		public boolean isGeneric() {
+			return true;
+		}
+
+		@Override
 		public ArgType[] getGenericTypes() {
 			return generics;
 		}
@@ -370,6 +380,10 @@ public abstract class ArgType {
 		return false;
 	}
 
+	public boolean isGeneric() {
+		return false;
+	}
+
 	public boolean isGenericType() {
 		return false;
 	}

jadx-core/src/main/java/jadx/core/dex/instructions/args/InsnArg.java

@@ -3,6 +3,9 @@ package jadx.core.dex.instructions.args;
 import jadx.core.dex.nodes.InsnNode;
 import jadx.core.utils.InsnUtils;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import com.android.dx.io.instructions.DecodedInstruction;
 
 /**
@@ -11,6 +14,8 @@ import com.android.dx.io.instructions.DecodedInstruction;
  */
 public abstract class InsnArg extends Typed {
 
+	private static final Logger LOG = LoggerFactory.getLogger(InsnArg.class);
+
 	protected InsnNode parentInsn;
 
 	public static RegisterArg reg(int regNum, ArgType type) {
@@ -72,7 +77,10 @@ public abstract class InsnArg extends Typed {
 		if (parent == null) {
 			return null;
 		}
-		assert parent != insn : "Can't wrap instruction info itself";
+		if (parent == insn) {
+			LOG.debug("Can't wrap instruction info itself: " + insn);
+			return null;
+		}
 		int count = parent.getArgsCount();
 		for (int i = 0; i < count; i++) {
 			if (parent.getArg(i) == this) {

jadx-core/src/main/java/jadx/core/dex/nodes/parser/LocalVar.java

@@ -6,8 +6,13 @@ import jadx.core.dex.instructions.args.TypedVar;
 import jadx.core.dex.nodes.DexNode;
 import jadx.core.utils.InsnUtils;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 final class LocalVar extends RegisterArg {
 
+	private static final Logger LOG = LoggerFactory.getLogger(LocalVar.class);
+
 	private boolean isEnd;
 
 	private int startAddr;
@@ -29,13 +34,32 @@ final class LocalVar extends RegisterArg {
 
 	private void init(String name, ArgType type, String sign) {
 		if (sign != null) {
-			type = ArgType.generic(sign);
+			ArgType gType = ArgType.generic(sign);
+			if (checkSignature(type, sign, gType)) {
+				type = gType;
+			}
 		}
 		TypedVar tv = new TypedVar(type);
 		tv.setName(name);
 		forceSetTypedVar(tv);
 	}
 
+	private boolean checkSignature(ArgType type, String sign, ArgType gType) {
+		boolean apply = false;
+		ArgType el = gType.getArrayRootElement();
+		if (el.isGeneric()) {
+			if (!type.getObject().equals(el.getObject())) {
+				LOG.warn("Generic type in debug info not equals: {} != {}", type, gType);
+			}
+			apply = true;
+		} else if (el.isGenericType()) {
+			apply = true;
+		} else {
+			LOG.debug("Local var signature from debug info not generic: {}, parsed: {}", sign, gType);
+		}
+		return apply;
+	}
+
 	public void start(int addr, int line) {
 		this.isEnd = false;
 		this.startAddr = addr;

jadx-core/src/main/java/jadx/core/dex/visitors/regions/CheckRegions.java

 package jadx.core.dex.visitors.regions;
 
 import jadx.core.dex.attributes.AttributeFlag;
+import jadx.core.dex.attributes.AttributeType;
 import jadx.core.dex.nodes.BlockNode;
 import jadx.core.dex.nodes.IBlock;
 import jadx.core.dex.nodes.IRegion;
@@ -21,7 +22,9 @@ public class CheckRegions extends AbstractVisitor {
 
 	@Override
 	public void visit(MethodNode mth) throws JadxException {
-		if (mth.isNoCode() || mth.getBasicBlocks().isEmpty()) {
+		if (mth.isNoCode()
+				|| mth.getBasicBlocks().isEmpty()
+				|| mth.getAttributes().contains(AttributeType.JADX_ERROR)) {
 			return;
 		}
 

jadx-core/src/main/java/jadx/core/utils/Utils.java

@@ -8,7 +8,7 @@ import java.io.StringWriter;
 import java.util.Iterator;
 
 public class Utils {
-	
+
 	private Utils() {
 	}
 

jadx-core/src/test/java/jadx/core/dex/nodes/parser/TestSignatureParser.java

@@ -50,7 +50,7 @@ public class TestSignatureParser {
 						"c", new ArgType[]{ArgType.genericType("V")}));
 
 		assertEquals(p("La<TV;>.LinkedHashIterator<Lb$c<Ls;TV;>;>;").consumeType().getObject(),
-				"a.LinkedHashIterator");
+				"a$LinkedHashIterator");
 
 	}