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glibc/SOURCES/glibc-rh2109510-18.patch

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import glibc-2.28-225.el8
2023-05-16 06:23:16 +00:00
commit f40c7887d3cc9bb0b56576ed9edbe505ff8058c0
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu Sep 22 12:10:41 2022 +0200
scripts: Extract glibcpp.py from check-obsolete-constructs.py
The C tokenizer is useful separately.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
diff --git a/scripts/check-obsolete-constructs.py b/scripts/check-obsolete-constructs.py
index 89d21dea6e788783..7c7a092e440a3258 100755
--- a/scripts/check-obsolete-constructs.py
+++ b/scripts/check-obsolete-constructs.py
@@ -24,193 +24,14 @@
"""
import argparse
-import collections
+import os
import re
import sys
-# Simplified lexical analyzer for C preprocessing tokens.
-# Does not implement trigraphs.
-# Does not implement backslash-newline in the middle of any lexical
-# item other than a string literal.
-# Does not implement universal-character-names in identifiers.
-# Treats prefixed strings (e.g. L"...") as two tokens (L and "...")
-# Accepts non-ASCII characters only within comments and strings.
-
-# Caution: The order of the outermost alternation matters.
-# STRING must be before BAD_STRING, CHARCONST before BAD_CHARCONST,
-# BLOCK_COMMENT before BAD_BLOCK_COM before PUNCTUATOR, and OTHER must
-# be last.
-# Caution: There should be no capturing groups other than the named
-# captures in the outermost alternation.
-
-# For reference, these are all of the C punctuators as of C11:
-# [ ] ( ) { } , ; ? ~
-# ! != * *= / /= ^ ^= = ==
-# # ##
-# % %= %> %: %:%:
-# & &= &&
-# | |= ||
-# + += ++
-# - -= -- ->
-# . ...
-# : :>
-# < <% <: << <<= <=
-# > >= >> >>=
-
-# The BAD_* tokens are not part of the official definition of pp-tokens;
-# they match unclosed strings, character constants, and block comments,
-# so that the regex engine doesn't have to backtrack all the way to the
-# beginning of a broken construct and then emit dozens of junk tokens.
-
-PP_TOKEN_RE_ = re.compile(r"""
- (?P<STRING> \"(?:[^\"\\\r\n]|\\(?:[\r\n -~]|\r\n))*\")
- |(?P<BAD_STRING> \"(?:[^\"\\\r\n]|\\[ -~])*)
- |(?P<CHARCONST> \'(?:[^\'\\\r\n]|\\(?:[\r\n -~]|\r\n))*\')
- |(?P<BAD_CHARCONST> \'(?:[^\'\\\r\n]|\\[ -~])*)
- |(?P<BLOCK_COMMENT> /\*(?:\*(?!/)|[^*])*\*/)
- |(?P<BAD_BLOCK_COM> /\*(?:\*(?!/)|[^*])*\*?)
- |(?P<LINE_COMMENT> //[^\r\n]*)
- |(?P<IDENT> [_a-zA-Z][_a-zA-Z0-9]*)
- |(?P<PP_NUMBER> \.?[0-9](?:[0-9a-df-oq-zA-DF-OQ-Z_.]|[eEpP][+-]?)*)
- |(?P<PUNCTUATOR>
- [,;?~(){}\[\]]
- | [!*/^=]=?
- | \#\#?
- | %(?:[=>]|:(?:%:)?)?
- | &[=&]?
- |\|[=|]?
- |\+[=+]?
- | -[=->]?
- |\.(?:\.\.)?
- | :>?
- | <(?:[%:]|<(?:=|<=?)?)?
- | >(?:=|>=?)?)
- |(?P<ESCNL> \\(?:\r|\n|\r\n))
- |(?P<WHITESPACE> [ \t\n\r\v\f]+)
- |(?P<OTHER> .)
-""", re.DOTALL | re.VERBOSE)
-
-HEADER_NAME_RE_ = re.compile(r"""
- < [^>\r\n]+ >
- | " [^"\r\n]+ "
-""", re.DOTALL | re.VERBOSE)
-
-ENDLINE_RE_ = re.compile(r"""\r|\n|\r\n""")
-
-# based on the sample code in the Python re documentation
-Token_ = collections.namedtuple("Token", (
- "kind", "text", "line", "column", "context"))
-Token_.__doc__ = """
- One C preprocessing token, comment, or chunk of whitespace.
- 'kind' identifies the token type, which will be one of:
- STRING, CHARCONST, BLOCK_COMMENT, LINE_COMMENT, IDENT,
- PP_NUMBER, PUNCTUATOR, ESCNL, WHITESPACE, HEADER_NAME,
- or OTHER. The BAD_* alternatives in PP_TOKEN_RE_ are
- handled within tokenize_c, below.
-
- 'text' is the sequence of source characters making up the token;
- no decoding whatsoever is performed.
-
- 'line' and 'column' give the position of the first character of the
- token within the source file. They are both 1-based.
-
- 'context' indicates whether or not this token occurred within a
- preprocessing directive; it will be None for running text,
- '<null>' for the leading '#' of a directive line (because '#'
- all by itself on a line is a "null directive"), or the name of
- the directive for tokens within a directive line, starting with
- the IDENT for the name itself.
-"""
-
-def tokenize_c(file_contents, reporter):
- """Yield a series of Token objects, one for each preprocessing
- token, comment, or chunk of whitespace within FILE_CONTENTS.
- The REPORTER object is expected to have one method,
- reporter.error(token, message), which will be called to
- indicate a lexical error at the position of TOKEN.
- If MESSAGE contains the four-character sequence '{!r}', that
- is expected to be replaced by repr(token.text).
- """
+# Make available glibc Python modules.
+sys.path.append(os.path.dirname(os.path.realpath(__file__)))
- Token = Token_
- PP_TOKEN_RE = PP_TOKEN_RE_
- ENDLINE_RE = ENDLINE_RE_
- HEADER_NAME_RE = HEADER_NAME_RE_
-
- line_num = 1
- line_start = 0
- pos = 0
- limit = len(file_contents)
- directive = None
- at_bol = True
- while pos < limit:
- if directive == "include":
- mo = HEADER_NAME_RE.match(file_contents, pos)
- if mo:
- kind = "HEADER_NAME"
- directive = "after_include"
- else:
- mo = PP_TOKEN_RE.match(file_contents, pos)
- kind = mo.lastgroup
- if kind != "WHITESPACE":
- directive = "after_include"
- else:
- mo = PP_TOKEN_RE.match(file_contents, pos)
- kind = mo.lastgroup
-
- text = mo.group()
- line = line_num
- column = mo.start() - line_start
- adj_line_start = 0
- # only these kinds can contain a newline
- if kind in ("WHITESPACE", "BLOCK_COMMENT", "LINE_COMMENT",
- "STRING", "CHARCONST", "BAD_BLOCK_COM", "ESCNL"):
- for tmo in ENDLINE_RE.finditer(text):
- line_num += 1
- adj_line_start = tmo.end()
- if adj_line_start:
- line_start = mo.start() + adj_line_start
-
- # Track whether or not we are scanning a preprocessing directive.
- if kind == "LINE_COMMENT" or (kind == "WHITESPACE" and adj_line_start):
- at_bol = True
- directive = None
- else:
- if kind == "PUNCTUATOR" and text == "#" and at_bol:
- directive = "<null>"
- elif kind == "IDENT" and directive == "<null>":
- directive = text
- at_bol = False
-
- # Report ill-formed tokens and rewrite them as their well-formed
- # equivalents, so downstream processing doesn't have to know about them.
- # (Rewriting instead of discarding provides better error recovery.)
- if kind == "BAD_BLOCK_COM":
- reporter.error(Token("BAD_BLOCK_COM", "", line, column+1, ""),
- "unclosed block comment")
- text += "*/"
- kind = "BLOCK_COMMENT"
- elif kind == "BAD_STRING":
- reporter.error(Token("BAD_STRING", "", line, column+1, ""),
- "unclosed string")
- text += "\""
- kind = "STRING"
- elif kind == "BAD_CHARCONST":
- reporter.error(Token("BAD_CHARCONST", "", line, column+1, ""),
- "unclosed char constant")
- text += "'"
- kind = "CHARCONST"
-
- tok = Token(kind, text, line, column+1,
- "include" if directive == "after_include" else directive)
- # Do not complain about OTHER tokens inside macro definitions.
- # $ and @ appear in macros defined by headers intended to be
- # included from assembly language, e.g. sysdeps/mips/sys/asm.h.
- if kind == "OTHER" and directive != "define":
- self.error(tok, "stray {!r} in program")
-
- yield tok
- pos = mo.end()
+import glibcpp
#
# Base and generic classes for individual checks.
@@ -446,7 +267,7 @@ class HeaderChecker:
typedef_checker = ObsoleteTypedefChecker(self, self.fname)
- for tok in tokenize_c(contents, self):
+ for tok in glibcpp.tokenize_c(contents, self):
typedef_checker.examine(tok)
def main():
diff --git a/scripts/glibcpp.py b/scripts/glibcpp.py
new file mode 100644
index 0000000000000000..b44c6a4392dde8ce
--- /dev/null
+++ b/scripts/glibcpp.py
@@ -0,0 +1,212 @@
+#! /usr/bin/python3
+# Approximation to C preprocessing.
+# Copyright (C) 2019-2022 Free Software Foundation, Inc.
+# 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/>.
+
+"""
+Simplified lexical analyzer for C preprocessing tokens.
+
+Does not implement trigraphs.
+
+Does not implement backslash-newline in the middle of any lexical
+item other than a string literal.
+
+Does not implement universal-character-names in identifiers.
+
+Treats prefixed strings (e.g. L"...") as two tokens (L and "...").
+
+Accepts non-ASCII characters only within comments and strings.
+"""
+
+import collections
+import re
+
+# Caution: The order of the outermost alternation matters.
+# STRING must be before BAD_STRING, CHARCONST before BAD_CHARCONST,
+# BLOCK_COMMENT before BAD_BLOCK_COM before PUNCTUATOR, and OTHER must
+# be last.
+# Caution: There should be no capturing groups other than the named
+# captures in the outermost alternation.
+
+# For reference, these are all of the C punctuators as of C11:
+# [ ] ( ) { } , ; ? ~
+# ! != * *= / /= ^ ^= = ==
+# # ##
+# % %= %> %: %:%:
+# & &= &&
+# | |= ||
+# + += ++
+# - -= -- ->
+# . ...
+# : :>
+# < <% <: << <<= <=
+# > >= >> >>=
+
+# The BAD_* tokens are not part of the official definition of pp-tokens;
+# they match unclosed strings, character constants, and block comments,
+# so that the regex engine doesn't have to backtrack all the way to the
+# beginning of a broken construct and then emit dozens of junk tokens.
+
+PP_TOKEN_RE_ = re.compile(r"""
+ (?P<STRING> \"(?:[^\"\\\r\n]|\\(?:[\r\n -~]|\r\n))*\")
+ |(?P<BAD_STRING> \"(?:[^\"\\\r\n]|\\[ -~])*)
+ |(?P<CHARCONST> \'(?:[^\'\\\r\n]|\\(?:[\r\n -~]|\r\n))*\')
+ |(?P<BAD_CHARCONST> \'(?:[^\'\\\r\n]|\\[ -~])*)
+ |(?P<BLOCK_COMMENT> /\*(?:\*(?!/)|[^*])*\*/)
+ |(?P<BAD_BLOCK_COM> /\*(?:\*(?!/)|[^*])*\*?)
+ |(?P<LINE_COMMENT> //[^\r\n]*)
+ |(?P<IDENT> [_a-zA-Z][_a-zA-Z0-9]*)
+ |(?P<PP_NUMBER> \.?[0-9](?:[0-9a-df-oq-zA-DF-OQ-Z_.]|[eEpP][+-]?)*)
+ |(?P<PUNCTUATOR>
+ [,;?~(){}\[\]]
+ | [!*/^=]=?
+ | \#\#?
+ | %(?:[=>]|:(?:%:)?)?
+ | &[=&]?
+ |\|[=|]?
+ |\+[=+]?
+ | -[=->]?
+ |\.(?:\.\.)?
+ | :>?
+ | <(?:[%:]|<(?:=|<=?)?)?
+ | >(?:=|>=?)?)
+ |(?P<ESCNL> \\(?:\r|\n|\r\n))
+ |(?P<WHITESPACE> [ \t\n\r\v\f]+)
+ |(?P<OTHER> .)
+""", re.DOTALL | re.VERBOSE)
+
+HEADER_NAME_RE_ = re.compile(r"""
+ < [^>\r\n]+ >
+ | " [^"\r\n]+ "
+""", re.DOTALL | re.VERBOSE)
+
+ENDLINE_RE_ = re.compile(r"""\r|\n|\r\n""")
+
+# based on the sample code in the Python re documentation
+Token_ = collections.namedtuple("Token", (
+ "kind", "text", "line", "column", "context"))
+Token_.__doc__ = """
+ One C preprocessing token, comment, or chunk of whitespace.
+ 'kind' identifies the token type, which will be one of:
+ STRING, CHARCONST, BLOCK_COMMENT, LINE_COMMENT, IDENT,
+ PP_NUMBER, PUNCTUATOR, ESCNL, WHITESPACE, HEADER_NAME,
+ or OTHER. The BAD_* alternatives in PP_TOKEN_RE_ are
+ handled within tokenize_c, below.
+
+ 'text' is the sequence of source characters making up the token;
+ no decoding whatsoever is performed.
+
+ 'line' and 'column' give the position of the first character of the
+ token within the source file. They are both 1-based.
+
+ 'context' indicates whether or not this token occurred within a
+ preprocessing directive; it will be None for running text,
+ '<null>' for the leading '#' of a directive line (because '#'
+ all by itself on a line is a "null directive"), or the name of
+ the directive for tokens within a directive line, starting with
+ the IDENT for the name itself.
+"""
+
+def tokenize_c(file_contents, reporter):
+ """Yield a series of Token objects, one for each preprocessing
+ token, comment, or chunk of whitespace within FILE_CONTENTS.
+ The REPORTER object is expected to have one method,
+ reporter.error(token, message), which will be called to
+ indicate a lexical error at the position of TOKEN.
+ If MESSAGE contains the four-character sequence '{!r}', that
+ is expected to be replaced by repr(token.text).
+ """
+
+ Token = Token_
+ PP_TOKEN_RE = PP_TOKEN_RE_
+ ENDLINE_RE = ENDLINE_RE_
+ HEADER_NAME_RE = HEADER_NAME_RE_
+
+ line_num = 1
+ line_start = 0
+ pos = 0
+ limit = len(file_contents)
+ directive = None
+ at_bol = True
+ while pos < limit:
+ if directive == "include":
+ mo = HEADER_NAME_RE.match(file_contents, pos)
+ if mo:
+ kind = "HEADER_NAME"
+ directive = "after_include"
+ else:
+ mo = PP_TOKEN_RE.match(file_contents, pos)
+ kind = mo.lastgroup
+ if kind != "WHITESPACE":
+ directive = "after_include"
+ else:
+ mo = PP_TOKEN_RE.match(file_contents, pos)
+ kind = mo.lastgroup
+
+ text = mo.group()
+ line = line_num
+ column = mo.start() - line_start
+ adj_line_start = 0
+ # only these kinds can contain a newline
+ if kind in ("WHITESPACE", "BLOCK_COMMENT", "LINE_COMMENT",
+ "STRING", "CHARCONST", "BAD_BLOCK_COM", "ESCNL"):
+ for tmo in ENDLINE_RE.finditer(text):
+ line_num += 1
+ adj_line_start = tmo.end()
+ if adj_line_start:
+ line_start = mo.start() + adj_line_start
+
+ # Track whether or not we are scanning a preprocessing directive.
+ if kind == "LINE_COMMENT" or (kind == "WHITESPACE" and adj_line_start):
+ at_bol = True
+ directive = None
+ else:
+ if kind == "PUNCTUATOR" and text == "#" and at_bol:
+ directive = "<null>"
+ elif kind == "IDENT" and directive == "<null>":
+ directive = text
+ at_bol = False
+
+ # Report ill-formed tokens and rewrite them as their well-formed
+ # equivalents, so downstream processing doesn't have to know about them.
+ # (Rewriting instead of discarding provides better error recovery.)
+ if kind == "BAD_BLOCK_COM":
+ reporter.error(Token("BAD_BLOCK_COM", "", line, column+1, ""),
+ "unclosed block comment")
+ text += "*/"
+ kind = "BLOCK_COMMENT"
+ elif kind == "BAD_STRING":
+ reporter.error(Token("BAD_STRING", "", line, column+1, ""),
+ "unclosed string")
+ text += "\""
+ kind = "STRING"
+ elif kind == "BAD_CHARCONST":
+ reporter.error(Token("BAD_CHARCONST", "", line, column+1, ""),
+ "unclosed char constant")
+ text += "'"
+ kind = "CHARCONST"
+
+ tok = Token(kind, text, line, column+1,
+ "include" if directive == "after_include" else directive)
+ # Do not complain about OTHER tokens inside macro definitions.
+ # $ and @ appear in macros defined by headers intended to be
+ # included from assembly language, e.g. sysdeps/mips/sys/asm.h.
+ if kind == "OTHER" and directive != "define":
+ self.error(tok, "stray {!r} in program")
+
+ yield tok
+ pos = mo.end()
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