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