Fix logging implementation

- Block signals in logging routine (fix #3976)
- Prevent possible deadlock after fork (stdio locks internally)
  by creating a new FILE pointer per logging call (thread/stack local)

native/jni/utils/misc.hpp

@@ -8,7 +8,12 @@
 #define UID_ROOT   0
 #define UID_SHELL  2000
 
+#define DISALLOW_COPY_AND_MOVE(clazz) \
+clazz(const clazz &) = delete; \
+clazz(clazz &&) = delete;
+
 class mutex_guard {
+    DISALLOW_COPY_AND_MOVE(mutex_guard)
 public:
     explicit mutex_guard(pthread_mutex_t &m): mutex(&m) {
         pthread_mutex_lock(mutex);
@@ -26,6 +31,7 @@ private:
 
 template <class Func>
 class run_finally {
+    DISALLOW_COPY_AND_MOVE(run_finally)
 public:
     explicit run_finally(const Func &fn) : fn(fn) {}
     ~run_finally() { fn(); }