[core] Fix module load on Android 9 (#810)

core/src/main/java/org/lsposed/lspd/util/InMemoryDelegateLastClassLoader.java

@@ -2,6 +2,9 @@ package org.lsposed.lspd.util;
 
 import static de.robv.android.xposed.XposedBridge.TAG;
 
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.OsConstants;
 import android.util.Log;
 
 import java.io.File;
@@ -12,20 +15,36 @@ import java.nio.channels.Channels;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Enumeration;
+import java.util.List;
+import java.util.jar.JarFile;
+import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
 import hidden.ByteBufferDexClassLoader;
 
 @SuppressWarnings("ConstantConditions")
 public final class InMemoryDelegateLastClassLoader extends ByteBufferDexClassLoader {
+    private static final String zipSeparator = "!/";
     private final String apk;
+    private final List<File> nativeLibraryDirs;
+
+    private static List<File> splitPaths(String searchPath) {
+        var result = new ArrayList<File>();
+        if (searchPath == null) return result;
+        for (var path : searchPath.split(File.pathSeparator)) {
+            result.add(new File(path));
+        }
+        return result;
+    }
 
     private InMemoryDelegateLastClassLoader(ByteBuffer[] dexBuffers,
                                             String librarySearchPath,
                                             ClassLoader parent,
                                             String apk) {
-        super(dexBuffers, librarySearchPath, parent);
+        super(dexBuffers, parent);
         this.apk = apk;
+        nativeLibraryDirs = new ArrayList<>(splitPaths(librarySearchPath));
+        nativeLibraryDirs.addAll(splitPaths(System.getProperty("java.library.path")));
     }
 
     @Override
@@ -51,6 +70,35 @@ public final class InMemoryDelegateLastClassLoader extends ByteBufferDexClassLoa
         }
     }
 
+    @Override
+    public String findLibrary(String libraryName) {
+        var fileName = System.mapLibraryName(libraryName);
+        for (var file : nativeLibraryDirs) {
+            var path = file.getPath();
+            if (path.contains(zipSeparator)) {
+                var split = path.split(zipSeparator, 2);
+                try (var jarFile = new JarFile(split[0])) {
+                    var entryName = split[1] + '/' + fileName;
+                    var entry = jarFile.getEntry(entryName);
+                    if (entry != null && entry.getMethod() == ZipEntry.STORED) {
+                        return split[0] + zipSeparator + entryName;
+                    }
+                } catch (IOException e) {
+                    Log.e(TAG, "Can not open " + split[0], e);
+                }
+            } else if (file.isDirectory()) {
+                var entryPath = new File(file, fileName).getPath();
+                try {
+                    var fd = Os.open(entryPath, OsConstants.O_RDONLY, 0);
+                    Os.close(fd);
+                    return entryPath;
+                } catch (ErrnoException ignored) {
+                }
+            }
+        }
+        return null;
+    }
+
     @Override
     protected URL findResource(String name) {
         try {

hiddenapi-bridge/src/main/java/hidden/ByteBufferDexClassLoader.java

@@ -5,7 +5,7 @@ import java.nio.ByteBuffer;
 import dalvik.system.BaseDexClassLoader;
 
 public class ByteBufferDexClassLoader extends BaseDexClassLoader {
-    public ByteBufferDexClassLoader(ByteBuffer[] dexFiles, String librarySearchPath, ClassLoader parent) {
-        super(dexFiles, librarySearchPath, parent);
+    public ByteBufferDexClassLoader(ByteBuffer[] dexFiles, ClassLoader parent) {
+        super(dexFiles, parent);
     }
 }

hiddenapi-stubs/src/main/java/dalvik/system/BaseDexClassLoader.java

@@ -15,7 +15,7 @@ public class BaseDexClassLoader extends ClassLoader {
         throw new RuntimeException("Stub!");
     }
 
-    public BaseDexClassLoader(ByteBuffer[] dexFiles, String librarySearchPath, ClassLoader parent) {
+    public BaseDexClassLoader(ByteBuffer[] dexFiles, ClassLoader parent) {
         throw new RuntimeException("Stub!");
     }