diff --git a/include/hook.h b/include/hook.h
index 91212d4..54eb8a5 100644
--- a/include/hook.h
+++ b/include/hook.h
@@ -74,6 +74,8 @@ struct MemberDetector<DerivedT,
                 return !strcmp(static_cast<DerivedT*>(self)->curSymName(),
                                std::get<0>(sym));
             });
+        // TODO: if std::get<2>(*iter) is a pointer and it's point to
+        // std::get<1>(*iter) then there will return nullptr
         *std::get<2>(*iter) = info.oldFuncPtr;
         return std::get<1>(*iter);
     }
diff --git a/lib/backtrace.cpp b/lib/backtrace.cpp
index d94a288..c96184a 100644
--- a/lib/backtrace.cpp
+++ b/lib/backtrace.cpp
@@ -46,6 +46,11 @@ bool CallFrames::CollectNative() {
 }
 
 bool CallFrames::CollectPython() {
+    // https://stackoverflow.com/questions/33637423/pygilstate-ensure-after-py-finalize
+    if (!Py_IsInitialized()) {
+        LOG(WARN) << "python process finished!";
+        return false;
+    }
     python_frames_.reserve(kMaxStackDeep);
     // Acquire the Global Interpreter Lock (GIL) before calling Python C API
     // functions from non-Python threads.
diff --git a/lib/xpu_mock.cpp b/lib/xpu_mock.cpp
index 655f50c..6c9ad53 100644
--- a/lib/xpu_mock.cpp
+++ b/lib/xpu_mock.cpp
@@ -32,6 +32,7 @@ class XpuRuntimeWrapApi {
     static int xpuWait(void* devStream);
     static int xpuMemcpy(void* dst, const void* src, uint64_t size, int kind);
     static int xpuSetDevice(int devId);
+    static int xpuCurrentDeviceId(int* devIdPtr);
 
    private:
     int (*raw_xpu_malloc_)(void**, uint64_t, int){nullptr};
@@ -254,6 +255,10 @@ int XpuRuntimeWrapApi::xpuSetDevice(int devId) {
     return XpuRuntimeWrapApi::instance().raw_xpu_set_device_id_(devId);
 }
 
+int XpuRuntimeWrapApi::xpuCurrentDeviceId(int* devIdPtr) {
+    return XpuRuntimeWrapApi::instance().raw_xpu_current_device_(devIdPtr);
+}
+
 struct XpuRuntimeApiHook : public hook::HookInstallerWrap<XpuRuntimeApiHook> {
     bool targetLib(const char* name) {
         return !strstr(name, "libxpurt.so.1") && !strstr(name, "libxpurt.so");
@@ -271,7 +276,7 @@ struct XpuRuntimeApiHook : public hook::HookInstallerWrap<XpuRuntimeApiHook> {
         // get device id
         {"xpu_current_device",
          reinterpret_cast<void*>(
-             XpuRuntimeWrapApi::instance().raw_xpu_current_device_),
+             XpuRuntimeWrapApi::instance().xpuCurrentDeviceId),
          reinterpret_cast<void**>(
              &XpuRuntimeWrapApi::instance().raw_xpu_current_device_)},
         // sync device
@@ -288,7 +293,7 @@ struct XpuRuntimeApiHook : public hook::HookInstallerWrap<XpuRuntimeApiHook> {
          reinterpret_cast<void**>(
              &XpuRuntimeWrapApi::instance().raw_xpu_set_device_id_)}};
 
-    void onSuccess() {}
+    void onSuccess() { LOG(WARN) << "install " << curSymName() << " success"; }
 };
 
 }  // namespace
@@ -298,5 +303,6 @@ extern "C" {
 void xpu_dh_initialize() {
     static auto install_wrap = std::make_shared<XpuRuntimeApiHook>();
     install_wrap->install();
+    LOG(INFO) << "xpu_dh_initialize complete!";
 }
 }
\ No newline at end of file