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decodetree: Open files with encoding='utf-8'

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When decodetree.py was added in commit 568ae7efae7, QEMU was
using Python 2 which happily reads UTF-8 files in text mode.
Python 3 requires either UTF-8 locale or an explicit encoding
passed to open(). Now that Python 3 is required, explicit
UTF-8 encoding for decodetree source files.

To avoid further problems with the user locale, also explicit
UTF-8 encoding for the generated C files.

Explicit both input/output are plain text by using the 't' mode.

This fixes:

$ /usr/bin/python3 scripts/decodetree.py test.decode
Traceback (most recent call last):
File "scripts/decodetree.py", line 1397, in <module>
main()
File "scripts/decodetree.py", line 1308, in main
parse_file(f, toppat)
File "scripts/decodetree.py", line 994, in parse_file
for line in f:
File "/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 80:
ordinal not in range(128)

Backports 4cacecaaa2bbf8af0967bd3eee43297fada475a9
This commit is contained in:
Philippe Mathieu-Daudé 2021-03-04 13:33:58 -05:00 committed by Lioncash
parent 419941c3d1
commit 296c32a8da
1 changed files with 10 additions and 7 deletions
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17
qemu/scripts/decodetree.py
View file

@ -4,7 +4,7 @@
# This library is free software; you can redistribute it and/or # This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public # modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either # License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version. # version 2.1 of the License, or (at your option) any later version.
# #
# This library is distributed in the hope that it will be useful, # This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of # but WITHOUT ANY WARRANTY; without even the implied warranty of
@ -20,6 +20,7 @@
# See the syntax and semantics in docs/devel/decodetree.rst. # See the syntax and semantics in docs/devel/decodetree.rst.
# #
import io
import os import os
import re import re
import sys import sys
@ -94,7 +95,7 @@ def str_indent(c):
def str_fields(fields): def str_fields(fields):
"""Return a string uniquely identifing FIELDS""" """Return a string uniquely identifying FIELDS"""
r = '' r = ''
for n in sorted(fields.keys()): for n in sorted(fields.keys()):
r += '_' + n r += '_' + n
@ -814,7 +815,7 @@ def parse_generic(lineno, parent_pat, name, toks):
arg = None arg = None
fmt = None fmt = None
for t in toks: for t in toks:
# '&Foo' gives a format an explcit argument set. # '&Foo' gives a format an explicit argument set.
if re.fullmatch(re_arg_ident, t): if re.fullmatch(re_arg_ident, t):
tt = t[1:] tt = t[1:]
if arg: if arg:
@ -903,7 +904,7 @@ def parse_generic(lineno, parent_pat, name, toks):
elif not (is_format and width == 0) and width != insnwidth: elif not (is_format and width == 0) and width != insnwidth:
error(lineno, 'definition has {0} bits'.format(width)) error(lineno, 'definition has {0} bits'.format(width))
# Do not check for fields overlaping fields; one valid usage # Do not check for fields overlapping fields; one valid usage
# is to be able to duplicate fields via import. # is to be able to duplicate fields via import.
fieldmask = 0 fieldmask = 0
for f in flds.values(): for f in flds.values():
@ -1304,7 +1305,7 @@ def main():
for filename in args: for filename in args:
input_file = filename input_file = filename
f = open(filename, 'r') f = open(filename, 'rt', encoding='utf-8')
parse_file(f, toppat) parse_file(f, toppat)
f.close() f.close()
@ -1324,9 +1325,11 @@ def main():
prop_size(stree) prop_size(stree)
if output_file: if output_file:
output_fd = open(output_file, 'w') output_fd = open(output_file, 'wt', encoding='utf-8')
else: else:
output_fd = sys.stdout output_fd = io.TextIOWrapper(sys.stdout.buffer,
encoding=sys.stdout.encoding,
errors="ignore")
output_autogen() output_autogen()
for n in sorted(arguments.keys()): for n in sorted(arguments.keys()):