qemurunner: Use backslashreplace with utf8 to make invalid characters clear

Switch to the backslashreplace error handling when decoding strings so that
invalid characters are clear in the stream to improve debugging.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/lib/oeqa/utils/qemurunner.py b/meta/lib/oeqa/utils/qemurunner.py
index b8f51112861e1e58ec56c8564cdfbe01ff315943..b738a261d879b6f4b2284e20d3710be9457982af 100644 (file)
--- a/meta/lib/oeqa/utils/qemurunner.py
+++ b/meta/lib/oeqa/utils/qemurunner.py
@@ -109,7 +109,7 @@ class QemuRunner:
 
     def decode_qemulog(self, todecode):
         # Sanitize the data received from qemu as it may contain control characters
-        msg = todecode.decode("utf-8", errors='ignore')
+        msg = todecode.decode("utf-8", errors='backslashreplace')
         msg = re_control_char.sub('', msg)
         return msg
 
@@ -473,7 +473,7 @@ class QemuRunner:
                         self.logger.error('Invalid file type: %s\n%s' % (file))
                         read = b''
 
-                    self.logger.debug2('Partial boot log:\n%s' % (read.decode('utf-8', errors='ignore')))
+                    self.logger.debug2('Partial boot log:\n%s' % (read.decode('utf-8', errors='backslashreplace')))
                     data = data + read
                     if data:
                         bootlog += data