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757d2d31
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2020-12-06T12:31:06
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c-stack: Use idx_t for nonnegative ptrdiff_t variables.
* lib/c-stack.c: Include idx.h.
(die): Mark buflen as nonnegative.
* modules/c-stack (Depends-on): Add idx.
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e14729f3
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2020-10-03T12:51:08
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c-stack: streamline Solaris configuration
* lib/c-stack.c: Omit mention of HAVE_SIGALTSTACK, since
the code is used only if a test for sigaltstack worked
in some other way.
* m4/c-stack.m4 (gl_PREREQ_C_STACK): Do not require gl_LIBSIGSEGV;
instead, execute gl_LIBSIGSEGV only if needed (because the XSI
heuristic does not work).
* modules/c-stack (Files): Add m4/libsigsegv.m4, since
we no longer require the libsigsegv module.
(Depends-on): Depend on havelib, not libsigsegv.
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649a39bb
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2020-09-20T12:52:15
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c-stack: output diagnostic in single 'write'
* lib/c-stack.c (die): In the typical case, use just one 'write'
syscall to output the diagnostic, as this lessens interleaving.
(die, c_stack_action): Assume C99.
* modules/c-stack (Depends-on): Add c99, mempcpy.
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8ba9126d
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2020-09-20T11:48:17
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c-stack: improve checking if !libsigsegv
If SIGINFO_WORKS, do not treat a null pointer dereference as if it
were a stack overflow. Use uintptr_t and INT_ADD_WRAPV to avoid
unlikely pointer overflow. Also, fix some obsolete code and typos.
I found these problems while looking into this bug report:
https://lists.gnu.org/r/grep-devel/2020-09/msg00053.html
* lib/c-stack.c: Include c-stack.h first, to test interface.
Include inttypes.h for UINTPTR_MAX, stdbool.h, stddef.h for
max_align_t, intprops.h for INT_ADD_WRAPV.
(USE_LIBSIGSEGV): New macro; use it to simplify later code.
(SIGSTKSZ): Simplify setup. Work around libsigsegv bug only
for libsigsegv 2.8 and earlier since the bug should be fixed
after that.
(alternate_signal_stack): Use max_align_t instead of doing it by hand.
(segv_handler, overflow_handler, segv_handler) [DEBUG]:
Assume sprintf returns byte count; this assumption is safe now.
(page_size): New static volatile variable, since sysconf isn’t
documented to be async-signal-safe on Solaris. This variable is
present and used if (!USE_LIBSIGSEGV && HAVE_SIGALTSTACK &&
HAVE_DECL_SIGALTSTACK && HAVE_STACK_OVERFLOW_HANDLING &&
SIGINFO_WORKS).
(segv_handler): Use it if present. Never report null pointer
dereference as a stack overflow. Check for (unlikely) unsigned
and/or pointer overflow.
* m4/c-stack.m4 (AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC):
Rename cache variables to gl_cv_sys_stack_overflow_works
and gl_cv_sys_xsi_stack_overflow_heuristic.
All uses changed.
(gl_PREREQ_C_STACK): Do not require AC_FUNC_ALLOCA, since
c-stack no longer uses STACK_DIRECTION.
Do not check for unistd.h, since we depend on unistd.
Fix shell typo ‘$"ac_cv_sys_xsi_stack_overflow_heuristic"’.
* modules/c-stack (Depends-on): Sort. Add intprops, inttypes,
stdbool, stddef.
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c6cfb82b
|
2019-01-04T20:04:57
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Fix some 'Link' sections.
* modules/c-stack (Link): Add link directive from the 'gettext-h'
dependency.
* modules/getaddrinfo (Link): Likewise.
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f29814b9
|
2016-08-18T15:18:23
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|
Port modules to use getprogname explicitly
... instead of requiring progname to be used (or program_name to be
provided).
* lib/argmatch.c: Do not include progname.h.
[TEST] (program_name): Do not define.
[TEST] (main): Call getprogname instead of using program_name.
* lib/c-stack.c: Do not include progname.h.
(program_name): Do not define.
(die): Call getprogname instead of using program_name.
* lib/chdir-long.c: Do not include progname.h.
[TEST_CHDIR] (main): Do not set program_name.
* lib/error.c [!_LIBC]: Include progname.h.
[!_LIBC] (program_name): Define using getprogname.
* lib/euidaccess.c: Do not include progname.h.
[TEST] (main): Do not set program_name.
* lib/git-merge-changelog.c: Include getprogname.h instead of
progname.h.
(usage): Call getprogname instead of using program_name.
(main): Likewise. Stop calling set_program_name.
* lib/group-member.c: Do not include progname.h.
[TEST] (main): Do not set program_name.
* modules/argmatch (Depends-on): Add getprogname.
* modules/c-stack (Depends-on): Likewise.
* modules/error (Depends-on): Likewise.
* modules/git-merge-changelog (Depends-on): Likewise.
Also remove progname.
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df57f427
|
2009-11-21T17:52:54
|
|
c-stack: avoid "ignoring return value of `write'" warning
* lib/c-stack.c: Include "ignore-value.h".
(die): Explicitly ignore each write return value.
* modules/c-stack (Depends-on): Add ignore-value.
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9de26050
|
2009-09-02T17:06:43
|
|
errno: use consistently
* lib/c-stack.c (ENOTSUP): <errno.h> guarantees a definition.
* lib/canonicalize-lgpl.c (ENAMETOOLONG): Likewise.
* lib/canonicalize.c (ELOOP): Likewise.
* lib/inet_ntop.c (EAFNOSUPPORT): Likewise.
* lib/inet_pton.c (EAFNOSUPPORT): Likewise.
* lib/lchown.c (EOPNOTSUPP): Likewise.
* lib/openat-priv.h (ENOSYS, EOPNOTSUPP): Likewise.
* lib/savewd.c (ESTALE): Likewise.
* lib/settime.c (ENOSYS): Likewise.
* lib/utimens.c (ENOSYS): Likewise.
* lib/xgethostname.c (ENAMETOOLONG): Likewise.
* lib/chdir-safer.c (ELOOP): Likewise.
(chdir_no_follow): Use HAVE_READLINK, not ELOOP, as witness.
* modules/c-stack (Depends-on): Add errno.
* modules/canonicalize (Depends-on): Likewise.
* modules/chdir-safer (Depends-on): Likewise.
* modules/fdopendir (Depends-on): Likewise.
* modules/inet_ntop (Depends-on): Likewise.
* modules/inet_pton (Depends-on): Likewise.
* modules/lchown (Depends-on): Likewise.
* modules/openat (Depends-on): Likewise.
* modules/savewd (Depends-on): Likewise.
* modules/settime (Depends-on): Likewise.
* m4/chdir-safer.m4 (gl_CHDIR_SAFER): Check for readlink.
Signed-off-by: Eric Blake <ebb9@byu.net>
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1cb66bdb
|
2008-07-17T16:21:42
|
|
c-stack: fix typo.
* modules/c-stack (Link): Fix typo.
Signed-off-by: Eric Blake <ebb9@byu.net>
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|
f6a65c23
|
2008-07-17T06:23:47
|
|
Make c-stack use libsigsegv, when available.
* modules/c-stack (Depends-on): Add libsigsegv.
* modules/c-stack-tests (Makefile.am): Link with libsigsegv, if
needed.
* lib/c-stack.c (SIGSTKSZ): Define fallback.
(segv_handler, overflow_handler, c_stack_action)
[HAVE_LIBSIGSEGV && !HAVE_XSI_STACK_OVERFLOW_HEURISTIC]: Add new
implementation when libsigsegv is available, but only when using
the library is necessary.
* m4/c-stack.m4 (AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Add
comment, explaining why XSI check fails on Linux.
(gl_PREREQ_C_STACK): Supply LIBCSTACK, LTLIBCSTACK.
* tests/test-c-stack2.sh: Tweak skip message.
* NEWS: Document new link-time requirements.
Signed-off-by: Eric Blake <ebb9@byu.net>
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|
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4b2f21b3
|
2008-06-21T07:08:49
|
|
Use sigaction module rather than signal().
* modules/c-stack (Depends-on): Add sigaction.
* modules/fatal-signal (Depends-on): Likewise.
* modules/nanosleep (Depends-on): Likewise.
* modules/sigprocmask (Files): Add sig-handler.h.
* modules/sigaction (Files): Likewise.
* lib/sig-handler.h (get_handler): New file, suggested by Paul
Eggert.
* lib/c-stack.c (SIGACTION_WORKS): Simplify conditions.
(c_stack_action) [!SIGACTION_WORKS]: Use sigaction, not signal.
* lib/fatal-signal.c (uninstall_handlers, install_handlers)
(init_fatal_signals): Likewise.
* lib/nanosleep.c (rpl_nanosleep): Likewise.
(siginterrupt): Delete fallback.
* lib/sigprocmask.c (handler_t): Delete.
(old_handlers): Use sa_handler_t instead.
* m4/nanosleep.m4 (gl_PREREQ_NANOSLEEP): Drop check for
siginterrupt.
Signed-off-by: Eric Blake <ebb9@byu.net>
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|
|
a52746a7
|
2008-04-29T03:04:35
|
|
Use 'raise'.
|
|
|
15a8db51
|
2006-03-08T01:37:15
|
|
* lib/c-stack.c: Include unistd.h unconditionally, since we now assume
the unistd module.
* lib/getlogin_r.c: Likewise.
* lib/getlogin_r.h: Likewise.
* lib/glob.c: Likewise.
* lib/pagealign_alloc.c: Likewise.
* lib/unistd_.h: Remove; no longer needed.
* modules/c-stack (Depends-on): Add unistd.
* modules/getlogin_r: Likewise.
* modules/glob: Likewise.
* modules/pagealign_alloc: Likewise.
* modules/unistd (Files): Remove lib/unistd_.h.
(EXTRA_DIST): Remove.
(unistd.h): Create using 'echo' rather than 'cp', so that we don't
need unistd_.h.
(MOSTLYCLEANFILES): Remove unistd.h-t.
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|
|
abe57472
|
2005-07-06T15:58:47
|
|
Support programs like Emacs that use gnulib but not gettext.
* MODULES.html.sh (Internationalization functions): Add gettext-h.
* modules/gettext-h: New file.
* modules/gettext (Files): Remove lib/gettext.h.
(Depends-on): Add gettext-h.
(Makefile.am): Remove lib_SOURCES.
* modules/argmatch, modules/c-stack, modules/closeout:
* modules/copy-file, modules/csharpcomp, modules/csharpexec:
* modules/execute, modules/file-type, modules/getaddrinfo:
* modules/getopt, modules/human, modules/javacomp:
* modules/javaexec, modules/mkdir-p, modules/obstack:
* modules/openat, modules/pagealign_alloc, modules/pipe:
* modules/quotearg, modules/regex, modules/rpmatch:
* modules/unicodeio, modules/userspec, modules/version-etc:
* modules/wait-process, modules/xalloc-die, modules/xmemcoll:
* modules/xsetenv:
Depend on gettext-h, not gettext.
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|
|
5143f4e9
|
2004-09-22T15:11:04
|
|
Add a license tag to every module.
|
|
|
6f99528a
|
2003-01-20T10:02:37
|
|
Add a Maintainer.
|
|
|
2e82f91f
|
2003-01-13T16:07:17
|
|
Add module descriptions.
|
|
|
740e9a30
|
2002-12-31T13:46:30
|
|
Module description.
|