Register attach library under short name after loading by path

System.load() registers a library by its full path, not by short name.
When WindowsAttachProvider's static initializer later calls
System.loadLibrary("attach"), the JVM searches java.library.path and
fails because the standalone JRE bin/ has no attach.dll.

After loading by absolute path, extend java.library.path to include the
dll's parent directory, null ClassLoader.sys_paths to force a rescan,
then call System.loadLibrary("attach") to register the short name. Any
subsequent loadLibrary("attach") calls from WindowsAttachProvider then
find the name already registered and succeed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: neykov

src/main/java/name/neykov/secrets/cli/AttachHelper.java

@@ -7,6 +7,7 @@
 import com.sun.tools.attach.VirtualMachineDescriptor;
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.Field;
 
 /**
  * A companion to AgentAttach that needs to be loaded in a different class loader, due to the
@@ -152,8 +153,35 @@ private static boolean tryLoadLibrary(String relativePath) throws FailureMessage
         } catch (UnsatisfiedLinkError e) {
             return false;
         }
-        // Once loaded by absolute path the library is registered under the name "attach",
-        // so any subsequent System.loadLibrary("attach") calls will find it already loaded.
+        // System.load() registers the library by its full path, not by short name.
+        // WindowsAttachProvider's static initializer calls System.loadLibrary("attach"),
+        // which searches java.library.path. Extend the path to include the library's
+        // parent directory and reset the classloader's cached sys_paths so the JVM
+        // rescans it, then call System.loadLibrary("attach") to register the short name.
+        String libDir = lib.getParent();
+        String initialPath = System.getProperty("java.library.path");
+        String extendedPath =
+                (initialPath != null && !initialPath.isEmpty())
+                        ? initialPath + File.pathSeparator + libDir
+                        : libDir;
+        System.setProperty("java.library.path", extendedPath);
+        Field sysPathsField;
+        try {
+            sysPathsField = ClassLoader.class.getDeclaredField("sys_paths");
+        } catch (NoSuchFieldException e) {
+            return false;
+        }
+        sysPathsField.setAccessible(true);
+        try {
+            sysPathsField.set(null, null);
+        } catch (IllegalAccessException e) {
+            return false;
+        }
+        try {
+            System.loadLibrary("attach");
+        } catch (UnsatisfiedLinkError e) {
+            return false;
+        }
         return true;
     }
 }