fix issue that print non-ascii character may cause exception (#22)

lldb/logs.py

@@ -1,19 +1,25 @@
 import threading
 import time
 import os
+import sys
 
 def background_follow(filename):
- with open(filename, 'r') as file:
+ with open(filename, 'r', encoding='utf-8') as file:
  file.seek(0, os.SEEK_END)
+ utf8_stdout = open(sys.stdout.fileno(), mode='w', encoding='utf-8', closefd=False)
 
  while True:
- line = file.readline()
-
- if not line:
- time.sleep(0.1)
- continue
-
- print(line.rstrip("\n"), end=None)
+ try:
+ line = file.readline()
+
+ if not line:
+ time.sleep(0.1)
+ continue
+
+ print(line.rstrip("\n"), end=None, file=utf8_stdout, flush=True)
+
+ except UnicodeDecodeError as e:
+ print(f"UnicodeDecodeError occurred while following file {filename}: {e}")
 
 
 def follow(debugger, command, result, internal_dict):