741 lines
28 KiB
Diff
741 lines
28 KiB
Diff
commit 711a322a235d4c8177713f11aa59156603b94aeb
|
||
Author: Zack Weinberg <zackw@panix.com>
|
||
Date: Mon Mar 11 10:59:27 2019 -0400
|
||
|
||
Use a proper C tokenizer to implement the obsolete typedefs test.
|
||
|
||
The test for obsolete typedefs in installed headers was implemented
|
||
using grep, and could therefore get false positives on e.g. “ulong”
|
||
in a comment. It was also scanning all of the headers included by
|
||
our headers, and therefore testing headers we don’t control, e.g.
|
||
Linux kernel headers.
|
||
|
||
This patch splits the obsolete-typedef test from
|
||
scripts/check-installed-headers.sh to a separate program,
|
||
scripts/check-obsolete-constructs.py. Being implemented in Python,
|
||
it is feasible to make it tokenize C accurately enough to avoid false
|
||
positives on the contents of comments and strings. It also only
|
||
examines $(headers) in each subdirectory--all the headers we install,
|
||
but not any external dependencies of those headers. Headers whose
|
||
installed name starts with finclude/ are ignored, on the assumption
|
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that they contain Fortran.
|
||
|
||
It is also feasible to make the new test understand the difference
|
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between _defining_ the obsolete typedefs and _using_ the obsolete
|
||
typedefs, which means posix/{bits,sys}/types.h no longer need to be
|
||
exempted. This uncovered an actual bug in bits/types.h: __quad_t and
|
||
__u_quad_t were being used to define __S64_TYPE, __U64_TYPE,
|
||
__SQUAD_TYPE and __UQUAD_TYPE. These are changed to __int64_t and
|
||
__uint64_t respectively. This is a safe change, despite the comments
|
||
in bits/types.h claiming a difference between __quad_t and __int64_t,
|
||
because those comments are incorrect. In all current ABIs, both
|
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__quad_t and __int64_t are ‘long’ when ‘long’ is a 64-bit type, and
|
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‘long long’ when ‘long’ is a 32-bit type, and similarly for __u_quad_t
|
||
and __uint64_t. (Changing the types to be what the comments say they
|
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are would be an ABI break, as it affects C++ name mangling.) This
|
||
patch includes a minimal change to make the comments not completely
|
||
wrong.
|
||
|
||
sys/types.h was defining the legacy BSD u_intN_t typedefs using a
|
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construct that was not necessarily consistent with how the C99 uintN_t
|
||
typedefs are defined, and is also too complicated for the new script to
|
||
understand (it lexes C relatively accurately, but it does not attempt
|
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to expand preprocessor macros, nor does it do any actual parsing).
|
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This patch cuts all of that out and uses bits/types.h's __uintN_t typedefs
|
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to define u_intN_t instead. This is verified to not change the ABI on
|
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any supported architecture, via the c++-types test, which means u_intN_t
|
||
and uintN_t were, in fact, consistent on all supported architectures.
|
||
|
||
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
|
||
|
||
* scripts/check-obsolete-constructs.py: New test script.
|
||
* scripts/check-installed-headers.sh: Remove tests for
|
||
obsolete typedefs, superseded by check-obsolete-constructs.py.
|
||
* Rules: Run scripts/check-obsolete-constructs.py over $(headers)
|
||
as a special test. Update commentary.
|
||
* posix/bits/types.h (__SQUAD_TYPE, __S64_TYPE): Define as __int64_t.
|
||
(__UQUAD_TYPE, __U64_TYPE): Define as __uint64_t.
|
||
Update commentary.
|
||
* posix/sys/types.h (__u_intN_t): Remove.
|
||
(u_int8_t): Typedef using __uint8_t.
|
||
(u_int16_t): Typedef using __uint16_t.
|
||
(u_int32_t): Typedef using __uint32_t.
|
||
(u_int64_t): Typedef using __uint64_t.
|
||
|
||
Conflicts:
|
||
Rules
|
||
(textual conflicts due to lack of check-wrapper-headers test.)
|
||
|
||
diff --git a/Rules b/Rules
|
||
index 5abb7270aa8e24aa..a07dbb8d978b5769 100644
|
||
--- a/Rules
|
||
+++ b/Rules
|
||
@@ -82,7 +82,8 @@ $(common-objpfx)dummy.c:
|
||
common-generated += dummy.o dummy.c
|
||
|
||
ifneq "$(headers)" ""
|
||
-# Special test of all the installed headers in this directory.
|
||
+# Test that all of the headers installed by this directory can be compiled
|
||
+# in isolation.
|
||
tests-special += $(objpfx)check-installed-headers-c.out
|
||
libof-check-installed-headers-c := testsuite
|
||
$(objpfx)check-installed-headers-c.out: \
|
||
@@ -93,6 +94,8 @@ $(objpfx)check-installed-headers-c.out: \
|
||
$(evaluate-test)
|
||
|
||
ifneq "$(CXX)" ""
|
||
+# If a C++ compiler is available, also test that they can be compiled
|
||
+# in isolation as C++.
|
||
tests-special += $(objpfx)check-installed-headers-cxx.out
|
||
libof-check-installed-headers-cxx := testsuite
|
||
$(objpfx)check-installed-headers-cxx.out: \
|
||
@@ -101,8 +104,19 @@ $(objpfx)check-installed-headers-cxx.out: \
|
||
"$(CXX) $(filter-out -std=%,$(CXXFLAGS)) -D_ISOMAC $(+includes)" \
|
||
$(headers) > $@; \
|
||
$(evaluate-test)
|
||
-endif
|
||
-endif
|
||
+endif # $(CXX)
|
||
+
|
||
+# Test that none of the headers installed by this directory use certain
|
||
+# obsolete constructs (e.g. legacy BSD typedefs superseded by stdint.h).
|
||
+# This script does not need $(py-env).
|
||
+tests-special += $(objpfx)check-obsolete-constructs.out
|
||
+libof-check-obsolete-constructs := testsuite
|
||
+$(objpfx)check-obsolete-constructs.out: \
|
||
+ $(..)scripts/check-obsolete-constructs.py $(headers)
|
||
+ $(PYTHON) $^ > $@ 2>&1; \
|
||
+ $(evaluate-test)
|
||
+
|
||
+endif # $(headers)
|
||
|
||
# This makes all the auxiliary and test programs.
|
||
|
||
diff --git a/posix/bits/types.h b/posix/bits/types.h
|
||
index 5e22ce41bf4c29b3..64f344c6e7897491 100644
|
||
--- a/posix/bits/types.h
|
||
+++ b/posix/bits/types.h
|
||
@@ -86,7 +86,7 @@ __extension__ typedef unsigned long long int __uintmax_t;
|
||
32 -- "natural" 32-bit type (always int)
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||
64 -- "natural" 64-bit type (long or long long)
|
||
LONG32 -- 32-bit type, traditionally long
|
||
- QUAD -- 64-bit type, always long long
|
||
+ QUAD -- 64-bit type, traditionally long long
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||
WORD -- natural type of __WORDSIZE bits (int or long)
|
||
LONGWORD -- type of __WORDSIZE bits, traditionally long
|
||
|
||
@@ -112,14 +112,14 @@ __extension__ typedef unsigned long long int __uintmax_t;
|
||
#define __SLONGWORD_TYPE long int
|
||
#define __ULONGWORD_TYPE unsigned long int
|
||
#if __WORDSIZE == 32
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||
-# define __SQUAD_TYPE __quad_t
|
||
-# define __UQUAD_TYPE __u_quad_t
|
||
+# define __SQUAD_TYPE __int64_t
|
||
+# define __UQUAD_TYPE __uint64_t
|
||
# define __SWORD_TYPE int
|
||
# define __UWORD_TYPE unsigned int
|
||
# define __SLONG32_TYPE long int
|
||
# define __ULONG32_TYPE unsigned long int
|
||
-# define __S64_TYPE __quad_t
|
||
-# define __U64_TYPE __u_quad_t
|
||
+# define __S64_TYPE __int64_t
|
||
+# define __U64_TYPE __uint64_t
|
||
/* We want __extension__ before typedef's that use nonstandard base types
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||
such as `long long' in C89 mode. */
|
||
# define __STD_TYPE __extension__ typedef
|
||
diff --git a/posix/sys/types.h b/posix/sys/types.h
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||
index db524d6cd13f0379..47eff1a7b1a91c81 100644
|
||
--- a/posix/sys/types.h
|
||
+++ b/posix/sys/types.h
|
||
@@ -154,37 +154,20 @@ typedef unsigned int uint;
|
||
|
||
#include <bits/stdint-intn.h>
|
||
|
||
-#if !__GNUC_PREREQ (2, 7)
|
||
-
|
||
/* These were defined by ISO C without the first `_'. */
|
||
-typedef unsigned char u_int8_t;
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||
-typedef unsigned short int u_int16_t;
|
||
-typedef unsigned int u_int32_t;
|
||
-# if __WORDSIZE == 64
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||
-typedef unsigned long int u_int64_t;
|
||
-# else
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||
-__extension__ typedef unsigned long long int u_int64_t;
|
||
-# endif
|
||
-
|
||
-typedef int register_t;
|
||
-
|
||
-#else
|
||
-
|
||
-/* For GCC 2.7 and later, we can use specific type-size attributes. */
|
||
-# define __u_intN_t(N, MODE) \
|
||
- typedef unsigned int u_int##N##_t __attribute__ ((__mode__ (MODE)))
|
||
-
|
||
-__u_intN_t (8, __QI__);
|
||
-__u_intN_t (16, __HI__);
|
||
-__u_intN_t (32, __SI__);
|
||
-__u_intN_t (64, __DI__);
|
||
+typedef __uint8_t u_int8_t;
|
||
+typedef __uint16_t u_int16_t;
|
||
+typedef __uint32_t u_int32_t;
|
||
+typedef __uint64_t u_int64_t;
|
||
|
||
+#if __GNUC_PREREQ (2, 7)
|
||
typedef int register_t __attribute__ ((__mode__ (__word__)));
|
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-
|
||
+#else
|
||
+typedef int register_t;
|
||
+#endif
|
||
|
||
/* Some code from BIND tests this macro to see if the types above are
|
||
defined. */
|
||
-#endif
|
||
#define __BIT_TYPES_DEFINED__ 1
|
||
|
||
|
||
diff --git a/scripts/check-installed-headers.sh b/scripts/check-installed-headers.sh
|
||
index 7a1969b43a144ebb..c2aeea5aabcc7ffd 100644
|
||
--- a/scripts/check-installed-headers.sh
|
||
+++ b/scripts/check-installed-headers.sh
|
||
@@ -16,11 +16,9 @@
|
||
# License along with the GNU C Library; if not, see
|
||
# <http://www.gnu.org/licenses/>.
|
||
|
||
-# Check installed headers for cleanliness. For each header, confirm
|
||
-# that it's possible to compile a file that includes that header and
|
||
-# does nothing else, in several different compilation modes. Also,
|
||
-# scan the header for a set of obsolete typedefs that should no longer
|
||
-# appear.
|
||
+# For each installed header, confirm that it's possible to compile a
|
||
+# file that includes that header and does nothing else, in several
|
||
+# different compilation modes.
|
||
|
||
# These compilation switches assume GCC or compatible, which is probably
|
||
# fine since we also assume that when _building_ glibc.
|
||
@@ -31,13 +29,6 @@ cxx_modes="-std=c++98 -std=gnu++98 -std=c++11 -std=gnu++11"
|
||
# These are probably the most commonly used three.
|
||
lib_modes="-D_DEFAULT_SOURCE=1 -D_GNU_SOURCE=1 -D_XOPEN_SOURCE=700"
|
||
|
||
-# sys/types.h+bits/types.h have to define the obsolete types.
|
||
-# rpc(svc)/* have the obsolete types too deeply embedded in their API
|
||
-# to remove.
|
||
-skip_obsolete_type_check='*/sys/types.h|*/bits/types.h|*/rpc/*|*/rpcsvc/*'
|
||
-obsolete_type_re=\
|
||
-'\<((__)?(quad_t|u(short|int|long|_(char|short|int([0-9]+_t)?|long|quad_t))))\>'
|
||
-
|
||
if [ $# -lt 3 ]; then
|
||
echo "usage: $0 c|c++ \"compile command\" header header header..." >&2
|
||
exit 2
|
||
@@ -46,14 +37,10 @@ case "$1" in
|
||
(c)
|
||
lang_modes="$c_modes"
|
||
cih_test_c=$(mktemp ${TMPDIR-/tmp}/cih_test_XXXXXX.c)
|
||
- already="$skip_obsolete_type_check"
|
||
;;
|
||
(c++)
|
||
lang_modes="$cxx_modes"
|
||
cih_test_c=$(mktemp ${TMPDIR-/tmp}/cih_test_XXXXXX.cc)
|
||
- # The obsolete-type check can be skipped for C++; it is
|
||
- # sufficient to do it for C.
|
||
- already="*"
|
||
;;
|
||
(*)
|
||
echo "usage: $0 c|c++ \"compile command\" header header header..." >&2
|
||
@@ -155,22 +142,8 @@ $expanded_lib_mode
|
||
int avoid_empty_translation_unit;
|
||
EOF
|
||
if $cc_cmd -fsyntax-only $lang_mode "$cih_test_c" 2>&1
|
||
- then
|
||
- includes=$($cc_cmd -fsyntax-only -H $lang_mode \
|
||
- "$cih_test_c" 2>&1 | sed -ne 's/^[.][.]* //p')
|
||
- for h in $includes; do
|
||
- # Don't repeat work.
|
||
- eval 'case "$h" in ('"$already"') continue;; esac'
|
||
-
|
||
- if grep -qE "$obsolete_type_re" "$h"; then
|
||
- echo "*** Obsolete types detected:"
|
||
- grep -HE "$obsolete_type_re" "$h"
|
||
- failed=1
|
||
- fi
|
||
- already="$already|$h"
|
||
- done
|
||
- else
|
||
- failed=1
|
||
+ then :
|
||
+ else failed=1
|
||
fi
|
||
done
|
||
done
|
||
diff --git a/scripts/check-obsolete-constructs.py b/scripts/check-obsolete-constructs.py
|
||
new file mode 100755
|
||
index 0000000000000000..ce5c72251f4d7cc0
|
||
--- /dev/null
|
||
+++ b/scripts/check-obsolete-constructs.py
|
||
@@ -0,0 +1,466 @@
|
||
+#! /usr/bin/python3
|
||
+# Copyright (C) 2019 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
|
||
+# <http://www.gnu.org/licenses/>.
|
||
+
|
||
+"""Verifies that installed headers do not use any obsolete constructs:
|
||
+ * legacy BSD typedefs superseded by <stdint.h>:
|
||
+ ushort uint ulong u_char u_short u_int u_long u_intNN_t quad_t u_quad_t
|
||
+ (sys/types.h is allowed to _define_ these types, but not to use them
|
||
+ to define anything else).
|
||
+"""
|
||
+
|
||
+import argparse
|
||
+import collections
|
||
+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).
|
||
+ """
|
||
+
|
||
+ 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()
|
||
+
|
||
+#
|
||
+# Base and generic classes for individual checks.
|
||
+#
|
||
+
|
||
+class ConstructChecker:
|
||
+ """Scan a stream of C preprocessing tokens and possibly report
|
||
+ problems with them. The REPORTER object passed to __init__ has
|
||
+ one method, reporter.error(token, message), which should be
|
||
+ called to indicate a problem detected at the position of TOKEN.
|
||
+ If MESSAGE contains the four-character sequence '{!r}' then that
|
||
+ will be replaced with a textual representation of TOKEN.
|
||
+ """
|
||
+ def __init__(self, reporter):
|
||
+ self.reporter = reporter
|
||
+
|
||
+ def examine(self, tok):
|
||
+ """Called once for each token in a header file.
|
||
+ Call self.reporter.error if a problem is detected.
|
||
+ """
|
||
+ raise NotImplementedError
|
||
+
|
||
+ def eof(self):
|
||
+ """Called once at the end of the stream. Subclasses need only
|
||
+ override this if it might have something to do."""
|
||
+ pass
|
||
+
|
||
+class NoCheck(ConstructChecker):
|
||
+ """Generic checker class which doesn't do anything. Substitute this
|
||
+ class for a real checker when a particular check should be skipped
|
||
+ for some file."""
|
||
+
|
||
+ def examine(self, tok):
|
||
+ pass
|
||
+
|
||
+#
|
||
+# Check for obsolete type names.
|
||
+#
|
||
+
|
||
+# The obsolete type names we're looking for:
|
||
+OBSOLETE_TYPE_RE_ = re.compile(r"""\A
|
||
+ (__)?
|
||
+ ( quad_t
|
||
+ | u(?: short | int | long
|
||
+ | _(?: char | short | int(?:[0-9]+_t)? | long | quad_t )))
|
||
+\Z""", re.VERBOSE)
|
||
+
|
||
+class ObsoleteNotAllowed(ConstructChecker):
|
||
+ """Don't allow any use of the obsolete typedefs."""
|
||
+ def examine(self, tok):
|
||
+ if OBSOLETE_TYPE_RE_.match(tok.text):
|
||
+ self.reporter.error(tok, "use of {!r}")
|
||
+
|
||
+class ObsoletePrivateDefinitionsAllowed(ConstructChecker):
|
||
+ """Allow definitions of the private versions of the
|
||
+ obsolete typedefs; that is, 'typedef [anything] __obsolete;'
|
||
+ """
|
||
+ def __init__(self, reporter):
|
||
+ super().__init__(reporter)
|
||
+ self.in_typedef = False
|
||
+ self.prev_token = None
|
||
+
|
||
+ def examine(self, tok):
|
||
+ # bits/types.h hides 'typedef' in a macro sometimes.
|
||
+ if (tok.kind == "IDENT"
|
||
+ and tok.text in ("typedef", "__STD_TYPE")
|
||
+ and tok.context is None):
|
||
+ self.in_typedef = True
|
||
+ elif tok.kind == "PUNCTUATOR" and tok.text == ";" and self.in_typedef:
|
||
+ self.in_typedef = False
|
||
+ if self.prev_token.kind == "IDENT":
|
||
+ m = OBSOLETE_TYPE_RE_.match(self.prev_token.text)
|
||
+ if m and m.group(1) != "__":
|
||
+ self.reporter.error(self.prev_token, "use of {!r}")
|
||
+ self.prev_token = None
|
||
+ else:
|
||
+ self._check_prev()
|
||
+
|
||
+ self.prev_token = tok
|
||
+
|
||
+ def eof(self):
|
||
+ self._check_prev()
|
||
+
|
||
+ def _check_prev(self):
|
||
+ if (self.prev_token is not None
|
||
+ and self.prev_token.kind == "IDENT"
|
||
+ and OBSOLETE_TYPE_RE_.match(self.prev_token.text)):
|
||
+ self.reporter.error(self.prev_token, "use of {!r}")
|
||
+
|
||
+class ObsoletePublicDefinitionsAllowed(ConstructChecker):
|
||
+ """Allow definitions of the public versions of the obsolete
|
||
+ typedefs. Only specific forms of definition are allowed:
|
||
+
|
||
+ typedef __obsolete obsolete; // identifiers must agree
|
||
+ typedef __uintN_t u_intN_t; // N must agree
|
||
+ typedef unsigned long int ulong;
|
||
+ typedef unsigned short int ushort;
|
||
+ typedef unsigned int uint;
|
||
+ """
|
||
+ def __init__(self, reporter):
|
||
+ super().__init__(reporter)
|
||
+ self.typedef_tokens = []
|
||
+
|
||
+ def examine(self, tok):
|
||
+ if tok.kind in ("WHITESPACE", "BLOCK_COMMENT",
|
||
+ "LINE_COMMENT", "NL", "ESCNL"):
|
||
+ pass
|
||
+
|
||
+ elif (tok.kind == "IDENT" and tok.text == "typedef"
|
||
+ and tok.context is None):
|
||
+ if self.typedef_tokens:
|
||
+ self.reporter.error(tok, "typedef inside typedef")
|
||
+ self._reset()
|
||
+ self.typedef_tokens.append(tok)
|
||
+
|
||
+ elif tok.kind == "PUNCTUATOR" and tok.text == ";":
|
||
+ self._finish()
|
||
+
|
||
+ elif self.typedef_tokens:
|
||
+ self.typedef_tokens.append(tok)
|
||
+
|
||
+ def eof(self):
|
||
+ self._reset()
|
||
+
|
||
+ def _reset(self):
|
||
+ while self.typedef_tokens:
|
||
+ tok = self.typedef_tokens.pop(0)
|
||
+ if tok.kind == "IDENT" and OBSOLETE_TYPE_RE_.match(tok.text):
|
||
+ self.reporter.error(tok, "use of {!r}")
|
||
+
|
||
+ def _finish(self):
|
||
+ if not self.typedef_tokens: return
|
||
+ if self.typedef_tokens[-1].kind == "IDENT":
|
||
+ m = OBSOLETE_TYPE_RE_.match(self.typedef_tokens[-1].text)
|
||
+ if m:
|
||
+ if self._permissible_public_definition(m):
|
||
+ self.typedef_tokens.clear()
|
||
+ self._reset()
|
||
+
|
||
+ def _permissible_public_definition(self, m):
|
||
+ if m.group(1) == "__": return False
|
||
+ name = m.group(2)
|
||
+ toks = self.typedef_tokens
|
||
+ ntok = len(toks)
|
||
+ if ntok == 3 and toks[1].kind == "IDENT":
|
||
+ defn = toks[1].text
|
||
+ n = OBSOLETE_TYPE_RE_.match(defn)
|
||
+ if n and n.group(1) == "__" and n.group(2) == name:
|
||
+ return True
|
||
+
|
||
+ if (name[:5] == "u_int" and name[-2:] == "_t"
|
||
+ and defn[:6] == "__uint" and defn[-2:] == "_t"
|
||
+ and name[5:-2] == defn[6:-2]):
|
||
+ return True
|
||
+
|
||
+ return False
|
||
+
|
||
+ if (name == "ulong" and ntok == 5
|
||
+ and toks[1].kind == "IDENT" and toks[1].text == "unsigned"
|
||
+ and toks[2].kind == "IDENT" and toks[2].text == "long"
|
||
+ and toks[3].kind == "IDENT" and toks[3].text == "int"):
|
||
+ return True
|
||
+
|
||
+ if (name == "ushort" and ntok == 5
|
||
+ and toks[1].kind == "IDENT" and toks[1].text == "unsigned"
|
||
+ and toks[2].kind == "IDENT" and toks[2].text == "short"
|
||
+ and toks[3].kind == "IDENT" and toks[3].text == "int"):
|
||
+ return True
|
||
+
|
||
+ if (name == "uint" and ntok == 4
|
||
+ and toks[1].kind == "IDENT" and toks[1].text == "unsigned"
|
||
+ and toks[2].kind == "IDENT" and toks[2].text == "int"):
|
||
+ return True
|
||
+
|
||
+ return False
|
||
+
|
||
+def ObsoleteTypedefChecker(reporter, fname):
|
||
+ """Factory: produce an instance of the appropriate
|
||
+ obsolete-typedef checker for FNAME."""
|
||
+
|
||
+ # The obsolete rpc/ and rpcsvc/ headers are allowed to use the
|
||
+ # obsolete types, because it would be more trouble than it's
|
||
+ # worth to remove them from headers that we intend to stop
|
||
+ # installing eventually anyway.
|
||
+ if (fname.startswith("rpc/")
|
||
+ or fname.startswith("rpcsvc/")
|
||
+ or "/rpc/" in fname
|
||
+ or "/rpcsvc/" in fname):
|
||
+ return NoCheck(reporter)
|
||
+
|
||
+ # bits/types.h is allowed to define the __-versions of the
|
||
+ # obsolete types.
|
||
+ if (fname == "bits/types.h"
|
||
+ or fname.endswith("/bits/types.h")):
|
||
+ return ObsoletePrivateDefinitionsAllowed(reporter)
|
||
+
|
||
+ # sys/types.h is allowed to use the __-versions of the
|
||
+ # obsolete types, but only to define the unprefixed versions.
|
||
+ if (fname == "sys/types.h"
|
||
+ or fname.endswith("/sys/types.h")):
|
||
+ return ObsoletePublicDefinitionsAllowed(reporter)
|
||
+
|
||
+ return ObsoleteNotAllowed(reporter)
|
||
+
|
||
+#
|
||
+# Master control
|
||
+#
|
||
+
|
||
+class HeaderChecker:
|
||
+ """Perform all of the checks on each header. This is also the
|
||
+ "reporter" object expected by tokenize_c and ConstructChecker.
|
||
+ """
|
||
+ def __init__(self):
|
||
+ self.fname = None
|
||
+ self.status = 0
|
||
+
|
||
+ def error(self, tok, message):
|
||
+ self.status = 1
|
||
+ if '{!r}' in message:
|
||
+ message = message.format(tok.text)
|
||
+ sys.stderr.write("{}:{}:{}: error: {}\n".format(
|
||
+ self.fname, tok.line, tok.column, message))
|
||
+
|
||
+ def check(self, fname):
|
||
+ self.fname = fname
|
||
+ try:
|
||
+ with open(fname, "rt") as fp:
|
||
+ contents = fp.read()
|
||
+ except OSError as e:
|
||
+ sys.stderr.write("{}: {}\n".format(fname, e.strerror))
|
||
+ self.status = 1
|
||
+ return
|
||
+
|
||
+ typedef_checker = ObsoleteTypedefChecker(self, self.fname)
|
||
+
|
||
+ for tok in tokenize_c(contents, self):
|
||
+ typedef_checker.examine(tok)
|
||
+
|
||
+def main():
|
||
+ ap = argparse.ArgumentParser(description=__doc__)
|
||
+ ap.add_argument("headers", metavar="header", nargs="+",
|
||
+ help="one or more headers to scan for obsolete constructs")
|
||
+ args = ap.parse_args()
|
||
+
|
||
+ checker = HeaderChecker()
|
||
+ for fname in args.headers:
|
||
+ # Headers whose installed name begins with "finclude/" contain
|
||
+ # Fortran, not C, and this program should completely ignore them.
|
||
+ if not (fname.startswith("finclude/") or "/finclude/" in fname):
|
||
+ checker.check(fname)
|
||
+ sys.exit(checker.status)
|
||
+
|
||
+main()
|