mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
303 lines
9.9 KiB
Python
303 lines
9.9 KiB
Python
#!/usr/bin/python3
|
|
# Test that the ld.so --list-diagnostics output has the expected syntax.
|
|
# Copyright (C) 2022-2024 Free Software Foundation, Inc.
|
|
# Copyright The GNU Toolchain Authors.
|
|
# This file is part of the GNU C Library.
|
|
#
|
|
# The GNU C Library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# The GNU C Library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with the GNU C Library; if not, see
|
|
# <https://www.gnu.org/licenses/>.
|
|
|
|
import argparse
|
|
import collections
|
|
import subprocess
|
|
import sys
|
|
|
|
try:
|
|
subprocess.run
|
|
except:
|
|
class _CompletedProcess:
|
|
def __init__(self, args, returncode, stdout=None, stderr=None):
|
|
self.args = args
|
|
self.returncode = returncode
|
|
self.stdout = stdout
|
|
self.stderr = stderr
|
|
|
|
def _run(*popenargs, input=None, timeout=None, check=False, **kwargs):
|
|
assert(timeout is None)
|
|
with subprocess.Popen(*popenargs, **kwargs) as process:
|
|
try:
|
|
stdout, stderr = process.communicate(input)
|
|
except:
|
|
process.kill()
|
|
process.wait()
|
|
raise
|
|
returncode = process.poll()
|
|
if check and returncode:
|
|
raise subprocess.CalledProcessError(returncode, popenargs)
|
|
return _CompletedProcess(popenargs, returncode, stdout, stderr)
|
|
|
|
subprocess.run = _run
|
|
|
|
# Number of errors encountered. Zero means no errors (test passes).
|
|
errors = 0
|
|
|
|
def parse_line(line):
|
|
"""Parse a line of --list-diagnostics output.
|
|
|
|
This function returns a pair (SUBSCRIPTS, VALUE). VALUE is either
|
|
a byte string or an integer. SUBSCRIPT is a tuple of (LABEL,
|
|
INDEX) pairs, where LABEL is a field identifier (a string), and
|
|
INDEX is an integer or None, to indicate that this field is not
|
|
indexed.
|
|
|
|
"""
|
|
|
|
# Extract the list of subscripts before the value.
|
|
idx = 0
|
|
subscripts = []
|
|
while line[idx] != '=':
|
|
start_idx = idx
|
|
|
|
# Extract the label.
|
|
while line[idx] not in '[.=':
|
|
idx += 1
|
|
label = line[start_idx:idx]
|
|
|
|
if line[idx] == '[':
|
|
# Subscript with a 0x index.
|
|
assert label
|
|
close_bracket = line.index(']', idx)
|
|
index = line[idx + 1:close_bracket]
|
|
assert index.startswith('0x')
|
|
index = int(index, 0)
|
|
subscripts.append((label, index))
|
|
idx = close_bracket + 1
|
|
else: # '.' or '='.
|
|
if label:
|
|
subscripts.append((label, None))
|
|
if line[idx] == '.':
|
|
idx += 1
|
|
|
|
# The value is either a string or a 0x number.
|
|
value = line[idx + 1:]
|
|
if value[0] == '"':
|
|
# Decode the escaped string into a byte string.
|
|
assert value[-1] == '"'
|
|
idx = 1
|
|
result = []
|
|
while True:
|
|
ch = value[idx]
|
|
if ch == '\\':
|
|
if value[idx + 1] in '"\\':
|
|
result.append(ord(value[idx + 1]))
|
|
idx += 2
|
|
else:
|
|
result.append(int(value[idx + 1:idx + 4], 8))
|
|
idx += 4
|
|
elif ch == '"':
|
|
assert idx == len(value) - 1
|
|
break
|
|
else:
|
|
result.append(ord(value[idx]))
|
|
idx += 1
|
|
value = bytes(result)
|
|
else:
|
|
# Convert the value into an integer.
|
|
assert value.startswith('0x')
|
|
value = int(value, 0)
|
|
return (tuple(subscripts), value)
|
|
|
|
assert parse_line('a.b[0x1]=0x2') == ((('a', None), ('b', 1)), 2)
|
|
assert parse_line(r'b[0x3]="four\040\"\\"') == ((('b', 3),), b'four \"\\')
|
|
|
|
# ABNF for a line of --list-diagnostics output.
|
|
diagnostics_abnf = r"""
|
|
HEXDIG = %x30-39 / %x61-6f ; lowercase a-f only
|
|
ALPHA = %x41-5a / %x61-7a / %x7f ; letters and underscore
|
|
ALPHA-NUMERIC = ALPHA / %x30-39 / "_"
|
|
DQUOTE = %x22 ; "
|
|
|
|
; Numbers are always hexadecimal and use a 0x prefix.
|
|
hex-value-prefix = %x30 %x78
|
|
hex-value = hex-value-prefix 1*HEXDIG
|
|
|
|
; Strings use octal escape sequences and \\, \".
|
|
string-char = %x20-21 / %x23-5c / %x5d-7e ; printable but not "\
|
|
string-quoted-octal = %x30-33 2*2%x30-37
|
|
string-quoted = "\" ("\" / DQUOTE / string-quoted-octal)
|
|
string-value = DQUOTE *(string-char / string-quoted) DQUOTE
|
|
|
|
value = hex-value / string-value
|
|
|
|
label = ALPHA *ALPHA-NUMERIC
|
|
index = "[" hex-value "]"
|
|
subscript = label [index]
|
|
|
|
line = subscript *("." subscript) "=" value
|
|
"""
|
|
|
|
def check_consistency_with_manual(manual_path):
|
|
"""Verify that the code fragments in the manual match this script.
|
|
|
|
The code fragments are duplicated to clarify the dual license.
|
|
"""
|
|
|
|
global errors
|
|
|
|
def extract_lines(path, start_line, end_line, skip_lines=()):
|
|
result = []
|
|
with open(path) as inp:
|
|
capturing = False
|
|
for line in inp:
|
|
if line.strip() == start_line:
|
|
capturing = True
|
|
elif not capturing or line.strip() in skip_lines:
|
|
continue
|
|
elif line.strip() == end_line:
|
|
capturing = False
|
|
else:
|
|
result.append(line)
|
|
if not result:
|
|
raise ValueError('{!r} not found in {!r}'.format(start_line, path))
|
|
if capturing:
|
|
raise ValueError('{!r} not found in {!r}'.format(end_line, path))
|
|
return result
|
|
|
|
def check(name, manual, script):
|
|
global errors
|
|
|
|
if manual == script:
|
|
return
|
|
print('error: {} fragment in manual is different'.format(name))
|
|
import difflib
|
|
sys.stdout.writelines(difflib.unified_diff(
|
|
manual, script, fromfile='manual', tofile='script'))
|
|
errors += 1
|
|
|
|
manual_abnf = extract_lines(manual_path,
|
|
'@c ABNF-START', '@end smallexample',
|
|
skip_lines=('@smallexample',))
|
|
check('ABNF', diagnostics_abnf.splitlines(keepends=True)[1:], manual_abnf)
|
|
|
|
# If the abnf module can be imported, run an additional check that the
|
|
# 'line' production from the ABNF grammar matches --list-diagnostics
|
|
# output lines.
|
|
try:
|
|
import abnf
|
|
except ImportError:
|
|
abnf = None
|
|
print('info: skipping ABNF validation because the abnf module is missing')
|
|
|
|
if abnf is not None:
|
|
class Grammar(abnf.Rule):
|
|
pass
|
|
|
|
Grammar.load_grammar(diagnostics_abnf)
|
|
|
|
def parse_abnf(line):
|
|
global errors
|
|
|
|
# Just verify that the line parses.
|
|
try:
|
|
Grammar('line').parse_all(line)
|
|
except abnf.ParseError:
|
|
print('error: ABNF parse error:', repr(line))
|
|
errors += 1
|
|
else:
|
|
def parse_abnf(line):
|
|
pass
|
|
|
|
|
|
def parse_diagnostics(cmd):
|
|
global errors
|
|
diag_out = subprocess.run(cmd, stdout=subprocess.PIPE, check=True,
|
|
universal_newlines=True, shell=True).stdout
|
|
if diag_out[-1] != '\n':
|
|
print('error: ld.so output does not end in newline')
|
|
errors += 1
|
|
|
|
PathType = collections.namedtuple('PathType',
|
|
'has_index value_type original_line')
|
|
# Mapping tuples of labels to PathType values.
|
|
path_types = {}
|
|
|
|
seen_subscripts = {}
|
|
|
|
for line in diag_out.splitlines():
|
|
parse_abnf(line)
|
|
subscripts, value = parse_line(line)
|
|
|
|
# Check for duplicates.
|
|
if subscripts in seen_subscripts:
|
|
print('error: duplicate value assignment:', repr(line))
|
|
print(' previous line:,', repr(seen_subscripts[line]))
|
|
errors += 1
|
|
else:
|
|
seen_subscripts[subscripts] = line
|
|
|
|
# Compare types against the previously seen labels.
|
|
labels = tuple([label for label, index in subscripts])
|
|
has_index = tuple([index is not None for label, index in subscripts])
|
|
value_type = type(value)
|
|
if labels in path_types:
|
|
previous_type = path_types[labels]
|
|
if has_index != previous_type.has_index:
|
|
print('error: line has mismatch of indexing:', repr(line))
|
|
print(' index types:', has_index)
|
|
print(' previous: ', previous_type.has_index)
|
|
print(' previous line:', repr(previous_type.original_line))
|
|
errors += 1
|
|
if value_type != previous_type.value_type:
|
|
print('error: line has mismatch of value type:', repr(line))
|
|
print(' value type:', value_type.__name__)
|
|
print(' previous: ', previous_type.value_type.__name__)
|
|
print(' previous line:', repr(previous_type.original_line))
|
|
errors += 1
|
|
else:
|
|
path_types[labels] = PathType(has_index, value_type, line)
|
|
|
|
# Check that this line does not add indexing to a previous value.
|
|
for idx in range(1, len(subscripts) - 1):
|
|
if subscripts[:idx] in path_types:
|
|
print('error: line assigns to atomic value:', repr(line))
|
|
print(' previous line:', repr(previous_type.original_line))
|
|
errors += 1
|
|
|
|
if errors:
|
|
sys.exit(1)
|
|
|
|
def get_parser():
|
|
parser = argparse.ArgumentParser(description=__doc__)
|
|
parser.add_argument('--manual',
|
|
help='path to .texi file for consistency checks')
|
|
parser.add_argument('command',
|
|
help='comand to run')
|
|
return parser
|
|
|
|
|
|
def main(argv):
|
|
parser = get_parser()
|
|
opts = parser.parse_args(argv)
|
|
|
|
if opts.manual:
|
|
check_consistency_with_manual(opts.manual)
|
|
|
|
parse_diagnostics(opts.command)
|
|
|
|
if errors:
|
|
sys.exit(1)
|
|
|
|
if __name__ == '__main__':
|
|
main(sys.argv[1:])
|