Add error_msg argument to CloseNativeLibrary

error_msg is set when dlclose/NativeBridgeUnloadLibrary fails.

Bug: https://issuetracker.google.com/79126103
Test: make
Change-Id: I043580209538ff47320e8d9a304a21c00c4b149f

1 files changed, 15 insertions, 3 deletions

diff --git a/libnativeloader/native_loader.cpp b/libnativeloader/native_loader.cpp
index 67c1c103b..b3e2b97fe 100644
--- a/libnativeloader/native_loader.cpp
+++ b/libnativeloader/native_loader.cpp
@@ -710,9 +710,21 @@ void* OpenNativeLibrary(JNIEnv* env,
 #endif
 }
 
-bool CloseNativeLibrary(void* handle, const bool needs_native_bridge) {
-    return needs_native_bridge ? NativeBridgeUnloadLibrary(handle) :
-                                 dlclose(handle);
+bool CloseNativeLibrary(void* handle, const bool needs_native_bridge, std::string* error_msg) {
+  bool success;
+  if (needs_native_bridge) {
+    success = (NativeBridgeUnloadLibrary(handle) == 0);
+    if (!success) {
+      *error_msg = NativeBridgeGetError();
+    }
+  } else {
+    success = (dlclose(handle) == 0);
+    if (!success) {
+      *error_msg = dlerror();
+    }
+  }
+
+  return success;
 }
 
 #if defined(__ANDROID__)