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To help detect common kinds of memory (and other resource) management
bugs, GCC 11 adds support for the detection of mismatched calls to
allocation and deallocation functions. At each call site to a known
deallocation function GCC checks the set of allocation functions
the former can be paired with and, if the two don't match, issues
a -Wmismatched-dealloc warning (something similar happens in C++
for mismatched calls to new and delete). GCC also uses the same
mechanism to detect attempts to deallocate objects not allocated
by any allocation function (or pointers past the first byte into
allocated objects) by -Wfree-nonheap-object.
This support is enabled for built-in functions like malloc and free.
To extend it beyond those, GCC extends attribute malloc to designate
a deallocation function to which pointers returned from the allocation
function may be passed to deallocate the allocated objects. Another,
optional argument designates the positional argument to which
the pointer must be passed.
This change is the first step in enabling this extended support for
Glibc.
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I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
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Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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* All files with FSF copyright notices: Update copyright dates
using scripts/update-copyrights.
* locale/programs/charmap-kw.h: Regenerated.
* locale/programs/locfile-kw.h: Likewise.
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As described in BZ#21398 (close as dup of 21393) report current
freopen implementation fails when one tries to freopen STDIN_FILENO,
STDOUT_FILENO, or STDERR_FILENO. Although on bug report the
discussion leads to argue if a close followed by a freopen on the
standard file is a valid operation, the underlying issue is not
really the check for dup3 returned value, but rather calling it
if the returned file descriptor is equal as the input one.
So for a quality of implementation this patch avoid calling dup3
for the aforementioned case. It also adds a dup3 error case check
for the two possible failures, with one being Linux only: EINTR and
EBUSY. The EBUSY issue is better explained on this stackoverflow
thread [1], but in a short it is due the internal Linux
implementation which allows a race condition window for dup2 due
the logic dissociation of file descriptor allocation and actual
VFS 'install' operation. For both outliers failures all allocated
memory is freed and a NULL FILE* is returned.
With this patch the example on BZ#21398 is now actually possible
(I used as the testcase for the bug report). Checked on
x86_64-linux-gnu.
[BZ #21393]
* libio/freopen.c (freopen): Avoid dup already opened file descriptor
and add a check for dup3 failure.
* libio/freopen64.c (freopen64): Likewise.
* libio/tst-freopen.c (do_test): Rename to do_test_basic and use
libsupport.
(do_test_bz21398): New test.
* manual/stdio.texi (freopen): Add documentation of EBUSY failure.
[1] http://stackoverflow.com/questions/23440216/race-condition-when-using-dup2
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This patch modifies several test cases to use test-skeleton.c.
It was generated by a bash script written for this purpose and
thus excludes several other tests which I deemed worth a visual
inspection before making the change.
I intend to follow up with individual patches to the tests
skipped by the script.
The script itself resides at http://git.io/WODAmg and should
reproduce this very patch when run against master.
ChangeLog:
2014-10-30 Arjun Shankar <arjun.is@lostca.se>
* catgets/test-gencat.c: Use test-skeleton.c.
* catgets/tst-catgets.c: Likewise.
* csu/tst-empty.c: Likewise.
* elf/tst-audit2.c: Likewise.
* elf/tst-global1.c: Likewise.
* elf/tst-pathopt.c: Likewise.
* elf/tst-piemod1.c: Likewise.
* elf/tst-tls10.c: Likewise.
* elf/tst-tls11.c: Likewise.
* elf/tst-tls12.c: Likewise.
* gnulib/tst-gcc.c: Likewise.
* iconvdata/tst-e2big.c: Likewise.
* iconvdata/tst-loading.c: Likewise.
* iconv/tst-iconv1.c: Likewise.
* iconv/tst-iconv2.c: Likewise.
* inet/test-inet6_opt.c: Likewise.
* inet/tst-gethnm.c: Likewise.
* inet/tst-network.c: Likewise.
* inet/tst-ntoa.c: Likewise.
* intl/tst-codeset.c: Likewise.
* intl/tst-gettext2.c: Likewise.
* intl/tst-gettext3.c: Likewise.
* intl/tst-ngettext.c: Likewise.
* intl/tst-translit.c: Likewise.
* io/test-stat.c: Likewise.
* libio/test-fmemopen.c: Likewise.
* libio/tst-freopen.c: Likewise.
* libio/tst-sscanf.c: Likewise.
* libio/tst-ungetwc1.c: Likewise.
* libio/tst-ungetwc2.c: Likewise.
* libio/tst-widetext.c: Likewise.
* localedata/tst-ctype.c: Likewise.
* localedata/tst-digits.c: Likewise.
* localedata/tst-leaks.c: Likewise.
* localedata/tst-mbswcs1.c: Likewise.
* localedata/tst-mbswcs2.c: Likewise.
* localedata/tst-mbswcs3.c: Likewise.
* localedata/tst-mbswcs4.c: Likewise.
* localedata/tst-mbswcs5.c: Likewise.
* localedata/tst-setlocale.c: Likewise.
* localedata/tst-trans.c: Likewise.
* localedata/tst-wctype.c: Likewise.
* localedata/tst-xlocale1.c: Likewise.
* login/tst-grantpt.c: Likewise.
* malloc/tst-calloc.c: Likewise.
* malloc/tst-malloc.c: Likewise.
* malloc/tst-mallocstate.c: Likewise.
* malloc/tst-mcheck.c: Likewise.
* malloc/tst-mtrace.c: Likewise.
* malloc/tst-obstack.c: Likewise.
* math/atest-exp2.c: Likewise.
* math/atest-exp.c: Likewise.
* math/atest-sincos.c: Likewise.
* math/test-matherr.c: Likewise.
* math/test-misc.c: Likewise.
* math/test-powl.c: Likewise.
* math/tst-definitions.c: Likewise.
* misc/tst-dirname.c: Likewise.
* misc/tst-efgcvt.c: Likewise.
* misc/tst-fdset.c: Likewise.
* misc/tst-hsearch.c: Likewise.
* misc/tst-mntent2.c: Likewise.
* nptl/tst-sem7.c: Likewise.
* nptl/tst-sem8.c: Likewise.
* nptl/tst-sem9.c: Likewise.
* nss/test-netdb.c: Likewise.
* posix/tst-fnmatch.c: Likewise.
* posix/tst-getlogin.c: Likewise.
* posix/tst-gnuglob.c: Likewise.
* posix/tst-mmap.c: Likewise.
* pwd/tst-getpw.c: Likewise.
* resolv/tst-inet_ntop.c: Likewise.
* rt/tst-timer.c: Likewise.
* stdio-common/test-fseek.c: Likewise.
* stdio-common/test-popen.c: Likewise.
* stdio-common/test-vfprintf.c: Likewise.
* stdio-common/tst-cookie.c: Likewise.
* stdio-common/tst-fileno.c: Likewise.
* stdio-common/tst-gets.c: Likewise.
* stdio-common/tst-obprintf.c: Likewise.
* stdio-common/tst-perror.c: Likewise.
* stdio-common/tst-sprintf2.c: Likewise.
* stdio-common/tst-sprintf3.c: Likewise.
* stdio-common/tst-sprintf.c: Likewise.
* stdio-common/tst-swprintf.c: Likewise.
* stdio-common/tst-tmpnam.c: Likewise.
* stdio-common/tst-unbputc.c: Likewise.
* stdio-common/tst-wc-printf.c: Likewise.
* stdlib/tst-environ.c: Likewise.
* stdlib/tst-fmtmsg.c: Likewise.
* stdlib/tst-limits.c: Likewise.
* stdlib/tst-rand48-2.c: Likewise.
* stdlib/tst-rand48.c: Likewise.
* stdlib/tst-random2.c: Likewise.
* stdlib/tst-random.c: Likewise.
* stdlib/tst-strtol.c: Likewise.
* stdlib/tst-strtoll.c: Likewise.
* stdlib/tst-tls-atexit.c: Likewise.
* stdlib/tst-xpg-basename.c: Likewise.
* string/test-ffs.c: Likewise.
* string/tst-bswap.c: Likewise.
* string/tst-inlcall.c: Likewise.
* string/tst-strtok.c: Likewise.
* string/tst-strxfrm.c: Likewise.
* sysdeps/x86_64/tst-audit10.c: Likewise.
* sysdeps/x86_64/tst-audit3.c: Likewise.
* sysdeps/x86_64/tst-audit4.c: Likewise.
* sysdeps/x86_64/tst-audit5.c: Likewise.
* time/tst-ftime_l.c: Likewise.
* time/tst-getdate.c: Likewise.
* time/tst-mktime3.c: Likewise.
* time/tst-mktime.c: Likewise.
* time/tst-posixtz.c: Likewise.
* time/tst-strptime2.c: Likewise.
* time/tst-strptime3.c: Likewise.
* wcsmbs/tst-btowc.c: Likewise.
* wcsmbs/tst-mbrtowc.c: Likewise.
* wcsmbs/tst-mbsrtowcs.c: Likewise.
* wcsmbs/tst-wchar-h.c: Likewise.
* wcsmbs/tst-wcpncpy.c: Likewise.
* wcsmbs/tst-wcrtomb.c: Likewise.
* wcsmbs/tst-wcsnlen.c: Likewise.
* wcsmbs/tst-wcstof.c: Likewise.
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* libio/tst-freopen.c (main): Use correct formats for __LINE__.
* libio/tst-mmap-setvbuf.c (main): Likewise.
* libio/tst-widetext.c (main): Likewise.
* libio/tst-mmap-eofsync.c (do_test): Use correct format in error
message.
* libio/tst-mmap-fflushsync.c (do_test): Likewise.
* libio/tst-mmap2-eofsync.c (do_test): Likewise.
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2002-07-24 Ulrich Drepper <drepper@redhat.com>
* libio/fileops.c (_IO_file_seekoff_mmap): Do use fp->_offset to
compute current position.
* stdio-common/tst-fseek.c (main): Improve error messages.
* libio/tst-freopen.c (main): Remove unused variable.
* libio/fileops.c (_IO_file_seekoff_mmap): Set fp->_offset after
succesful seek call. Simply error checking.
2002-07-25 Jakub Jelinek <jakub@redhat.com>
* config.h.in: Use __ASSEMBLER__ test macro not ASSEMBLER.
* sysdeps/ia64/fpu/libm_support.h: Likewise.
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2002-07-10 Ulrich Drepper <drepper@redhat.com>
* Versions.def [libpthread]: Add GLIBC_2.2.6.
* posix/Versions [libc] (GLIBC_2.2.6): Add __nanosleep.
2002-07-06 Bruno Haible <bruno@clisp.org>
* sysdeps/unix/sysv/sysv4/bits/sigset.h (__NSSBITS): Correct value.
* sysdeps/unix/sysv/linux/bits/statvfs.h (ST_NODIRATIME): Set to 2048.
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