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2016-09-19Add <limits.h> integer width macros.Joseph Myers
TS 18661-1 defines macros for the width of integer types, intended for use with the fromfp functions to convert from floating-point types to integer types of any width, in any rounding mode and with control over whether "inexact" is raised. Such macros are, of course, more generally useful than just with those functions. Those macros are added to <limits.h> and <stdint.h>. This patch adds the <limits.h> macros to glibc's header, with the <stdint.h> ones intended to be added in a separate patch (which would add to the NEWS entry created by this patch). I've also added these macros to GCC's headers for GCC 7, but definitions in glibc's <limits.h> are still useful for older GCC, for non-GNU compilers and for when it's _GNU_SOURCE rather than __STDC_WANT_IEC_60559_BFP_EXT__ that implies the macros should be defined since the GCC header only considers __STDC_WANT_IEC_60559_BFP_EXT__ (and for glibc systems, the definitions in GCC's <stdint.h> will only be used with -ffreestanding). Tested for x86_64 and x86. * include/limits.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. [__GLIBC_USE (IEC_60559_BFP_EXT)] (CHAR_WIDTH): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (SCHAR_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (UCHAR_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (SHRT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (USHRT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (INT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (UINT_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (LONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ULONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (LLONG_WIDTH): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (ULLONG_WIDTH): Likewise. * manual/lang.texi (Width of Type): Document these macros. * stdlib/tst-width.c: New file. * stdlib/Makefile (tests): Add tst-width.
2016-08-26malloc: Simplify static malloc interposition [BZ #20432]Florian Weimer
Existing interposed mallocs do not define the glibc-internal fork callbacks (and they should not), so statically interposed mallocs lead to link failures because the strong reference from fork pulls in glibc's malloc, resulting in multiple definitions of malloc-related symbols.
2016-08-09Add atomic operations required by the new condition variable.Torvald Riegel
* include/atomic.h (atomic_fetch_and_relaxed, atomic_fetch_and_release, atomic_fetch_or_release, atomic_fetch_xor_release): New.
2016-08-05Add atomic_exchange_relaxed.Torvald Riegel
* include/atomic.h (atomic_exchange_relaxed): New.
2016-08-03Support __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro.Joseph Myers
This patch implements support for the __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro, following the __GLIBC_USE approach used for other ISO C feature test macros. Currently this only affects the exp10 functions (which glibc has had for a long time). Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * bits/libc-header-start.h (__GLIBC_USE_IEC_60559_FUNCS_EXT): New macro. * include/features.h (__STDC_WANT_IEC_60559_FUNCS_EXT__): Document. * manual/creature.texi (__STDC_WANT_IEC_60559_FUNCS_EXT__): Document macro. * manual/math.texi (exp10): Document as ISO from TS 18661-4:2015. (exp10f): Likewise. (exp10l): Likewise. * math/bits/mathcalls.h (exp10): Declare if [__GLIBC_USE (IEC_60559_FUNCS_EXT)], not [__USE_GNU].
2016-08-03Minimize sysdeps code involved in defining major/minor/makedev.Zack Weinberg
Presently sys/sysmacros.h is entirely defined in sysdeps. This would mean that the deprecation logic coming up in the next patch would have to be written twice (in generic/ and unix/sysv/linux/). To avoid that, hoist all but the unavoidably system-dependent logic to misc/, leaving a bits/ header behind. This also promotes the Linux-specific encoding of dev_t, which accommodates 32-bit major and minor numbers in a 64-bit dev_t, to generic, as glibc's dev_t is always 64 bits wide. The former Linux implementation used inline functions to avoid evaluating arguments more than once. After this change, all platforms use inline functions, which means that three new symbols are added to the generic ABI. (These symbols are in the user namespace, which is how they have always been on Linux. They begin with "gnu_dev_", so collisions with user code are pretty unlikely.) New ports henceforth need only provide a bits/sysmacros.h defining internal macros __SYSMACROS_{DECLARE,DEFINE}_{MAJOR,MINOR,MAKEDEV}. This is only necessary if the kernel encoding is incompatible with the now-generic encoding (for instance, it would be necessary for FreeBSD). While I was at it, I added a basic round-trip test for these functions. * sysdeps/generic/sys/sysmacros.h: Delete file. * sysdeps/unix/sysv/linux/makedev.c: Delete file. * sysdeps/unix/sysv/linux/sys/sysmacros.h: Move file ... * bits/sysmacros.h: ... here; this encoding is now the generic encoding. Now defines only the following macros: __SYSMACROS_DECLARE_MAJOR, __SYSMACROS_DEFINE_MAJOR, __SYSMACROS_DECLARE_MINOR, __SYSMACROS_DEFINE_MINOR, __SYSMACROS_DECLARE_MAKEDEV, __SYSMACROS_DEFINE_MAKEDEV. * misc/sys/sysmacros.h, misc/makedev.c: New files that use bits/sysmacros.h and the above new macros to generate the public implementations of major, minor, and makedev. * misc/tst-makedev.c: New test. * include/sys/sysmacros.h: New wrapper. * misc/Makefile (headers): Add sys/sysmacros.h, bits/sysmacros.h. (routines): Add makedev. (tests): Add tst-makedev. * misc/Versions [GLIBC_2.25]: Add gnu_dev_major, gnu_dev_minor, gnu_dev_makedev. * posix/Makefile (headers): Remove sys/sysmacros.h. * sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Remove makedev. * sysdeps/arm/nacl/libc.abilist: Add GLIBC_2.25, gnu_dev_major, gnu_dev_makedev, gnu_dev_minor. * sysdeps/unix/sysv/linux/aarch64/libc.abilist * sysdeps/unix/sysv/linux/alpha/libc.abilist * sysdeps/unix/sysv/linux/arm/libc.abilist * sysdeps/unix/sysv/linux/hppa/libc.abilist * sysdeps/unix/sysv/linux/i386/libc.abilist * sysdeps/unix/sysv/linux/ia64/libc.abilist * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist * sysdeps/unix/sysv/linux/microblaze/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist * sysdeps/unix/sysv/linux/nios2/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist * sysdeps/unix/sysv/linux/sh/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist * sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Add GLIBC_2.25.
2016-08-03Add utility macros for clang detection, and deprecation with messages.Zack Weinberg
There are three new macros added to features.h and sys/cdefs.h: * __glibc_clang_prereq: just like __GNUC_PREREQ, but for clang. * __glibc_clang_has_extension: wraps clang's intrinsic __has_extension. Writing "#if defined __clang__ && __has_extension (...)" doesn't work, because compilers other than clang will object to the unknown macro __has_extension even though they don't need to evaluate it. Instead, write "#if __glibc_clang_has_extension (...)". * __attribute_deprecated_msg__(msg): like __attribute_deprecated__, but if possible, prints a message. The first two are used to define the third. The third will be used in subsequent patches. * include/features.h (__glibc_clang_prereq): New macro. * misc/sys/cdefs.h (__glibc_clang_has_extension) (__attribute_deprecated_msg__): New macros.
2016-08-03Support __STDC_WANT_IEC_60559_BFP_EXT__ feature test macro.Joseph Myers
This patch implements support for the __STDC_WANT_IEC_60559_BFP_EXT__ feature test macro from ISO/IEC 18661-1:2014, following the __GLIBC_USE approach now used for __STDC_WANT_LIB_EXT2__. For this macro, the relevant consideration is whether it is defined or undefined when an affected header is included (not what its value is if defined, and not whether it's defined or undefined when any other unaffected system header is included). Currently this macro only affects the issignaling macro and the nextup and nextdown functions (so they can be enabled by defining this macro, not just by defining _GNU_SOURCE as previously). Any further features from this TS added in future would also be conditioned on this macro. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * bits/libc-header-start.h (__GLIBC_USE_IEC_60559_BFP_EXT): New macro. * include/features.h (__STDC_WANT_IEC_60559_BFP_EXT__): Document. * manual/arith.texi (issignaling): Document as ISO from TS 18661-1:2014. (nextup): Likewise. (nextupf): Likewise. (nextupl): Likewise. (nextdown): Likewise. (nextdownf): Likewise. (nextdownl): Likewise. * manual/creature.texi (__STDC_WANT_IEC_60559_BFP_EXT__): Document macro. * math/math.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (issignaling): Define if [__GLIBC_USE (IEC_60559_BFP_EXT)], not [__USE_GNU]. * math/bits/mathcalls.h (nextdown): Declare if [__GLIBC_USE (IEC_60559_BFP_EXT)], not [__USE_GNU]. (nextup): Likewise. (__issignaling): Likewise.
2016-08-02Support __STDC_WANT_LIB_EXT2__ feature test macro.Joseph Myers
This patch implements support for the __STDC_WANT_LIB_EXT2__ feature test macro from ISO/IEC TR 24731-2:2010, thereby implementing one possible approach for supporting ISO C feature test macros. Recall that, as described in <https://sourceware.org/ml/libc-alpha/2016-05/msg00486.html>, these macros work based on the definition when affected headers are included, so cannot be handled once when the first system header is included because that might not be one of the headers the particular macro in question affects. <https://sourceware.org/ml/libc-alpha/2016-05/msg00680.html> expresses views on possible approaches for implementation and <https://sourceware.org/ml/libc-alpha/2016-06/msg00039.html> follows up on that. This patch arranges things so that the relevant condition is __GLIBC_USE (LIB_EXT2), following one of the suggestions given. Headers using these macros include <bits/libc-header-start.h>, which in turn includes <features.h>. Headers must define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION before including <bits/libc-header-start.h>, to discourage inclusion outside glibc as requested. __USE_GNU conditions on affected functions are changed to __GLIBC_USE (LIB_EXT2), while it's added as an additional alternative on the conditions for functions already enabled for some POSIX versions. It would be possible to convert existing __USE_* conditionals to __GLIBC_USE (with the relevant __GLIBC_USE_* being defined in <features.h> where __USE_* are presently defined), and so make them typo-proof (given -Wundef -Werror in glibc builds) because __GLIBC_USE is used with #if not #ifdef / #if defined. No attempt is made to enforce the rule about diagnosing different definitions of __STDC_WANT_LIB_EXT2__ when affected headers are included; such a diagnostic is incompatible with multiple-include guards on the affected headers, unless compiler extensions are added to support it. As previously noted, glibc does not implement all features from TR 24731-2:2010: the functions aswprintf vaswprintf getwdelim getwline are not in glibc, although they would be appropriate to add if someone wished to do so. But I think it makes sense to support the feature test macro if *any* of the controlled features are present in glibc. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * bits/libc-header-start.h: New file. * Makefile (headers): Add bits/libc-header-start.h. * include/features.h (__STDC_WANT_LIB_EXT2__): Document. (__GLIBC_USE): New macro. * libio/stdio.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (fmemopen): Declare also if [__GLIBC_USE (LIB_EXT2)]. (open_memstream): Likewise. (vasprintf): Declare if [__GLIBC_USE (LIB_EXT2)], not [__USE_GNU]. (__asprintf): Likewise. (asprintf): Likewise. (__getdelim): Declare also if [__GLIBC_USE (LIB_EXT2)]. (getdelim): Likewise. (getline): Likewise. * string/string.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (strdup): Declare also if [__GLIBC_USE (LIB_EXT2)] (strndup): Likewise. * wcsmbs/wchar.h: Define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include <bits/libc-header-start.h> instead of including <features.h>. (open_wmemstream): Declare also if [__GLIBC_USE (LIB_EXT2)]. * manual/creature.texi (__STDC_WANT_LIB_EXT2__): Document macro.
2016-08-02Add support for referencing specific symbol versionsFlorian Weimer
This is needed for writing tests of compat symbols.
2016-08-01Update for glibc 2.24 release.glibc-2.24Carlos O'Donell
2016-06-24Remove atomic_compare_and_exchange_bool_rel.Torvald Riegel
atomic_compare_and_exchange_bool_rel and catomic_compare_and_exchange_bool_rel are removed and replaced with the new C11-like atomic_compare_exchange_weak_release. The concurrent code in nscd/cache.c has not been reviewed yet, so this patch does not add detailed comments. * nscd/cache.c (cache_add): Use new C11-like atomic operation instead of atomic_compare_and_exchange_bool_rel. * nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_full): Likewise. * include/atomic.h (atomic_compare_and_exchange_bool_rel, catomic_compare_and_exchange_bool_rel): Remove. * sysdeps/aarch64/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/alpha/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/arm/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/mips/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/tile/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise.
2016-06-20Revert __malloc_initialize_hook symbol poisoningFlorian Weimer
It turns out the Emacs-internal malloc implementation uses __malloc_* symbols. If glibc poisons them in <stdc-pre.h>, Emacs will no longer compile.
2016-06-10malloc: Remove __malloc_initialize_hook from the API [BZ #19564]Florian Weimer
__malloc_initialize_hook is interposed by application code, so the usual approach to define a compatibility symbol does not work. This commit adds a new mechanism based on #pragma GCC poison in <stdc-predef.h>.
2016-06-04Use __typeof instead of typeofAndreas Schwab
2016-06-03Fix include/wchar.h for C++Carlos O'Donell
When trying to compile regression tests that use C++ and the threads header you get this failure: In file included from /usr/include/c++/5.3.1/cwchar:44:0, from /usr/include/c++/5.3.1/bits/postypes.h:40, from /usr/include/c++/5.3.1/bits/char_traits.h:40, from /usr/include/c++/5.3.1/string:40, from /usr/include/c++/5.3.1/stdexcept:39, from /usr/include/c++/5.3.1/array:38, from /usr/include/c++/5.3.1/tuple:39, from /usr/include/c++/5.3.1/functional:55, from /usr/include/c++/5.3.1/thread:39, from tst-thread-quick_exit.cc:19: ../include/wchar.h:105:23: error: invalid conversion from ‘wchar_t* (*)(wchar_t*, wchar_t, size_t) throw () {aka wchar_t* (*)(wchar_t*, wchar_t, long unsigned int) throw ()}’ to ‘int’ [-fpermissive] extern typeof (wmemset) __wmemset; ^ ../include/wchar.h:105:25: error: expected ‘,’ or ‘;’ before ‘__wmemset’ extern typeof (wmemset) __wmemset; ^ The simplest fix for C++ is to avoid the use of typeof and just declare the prototype as expected. No regressions on x86_64. Committed as obvious. The include/wchar.h header is only for internal build uses and therefore is not ever seen by any external users and needs no bug #.
2016-04-29NSS: Implement group merging support.Stephen Gallagher
https://sourceware.org/glibc/wiki/Proposals/GroupMerging == Justification == It is common today for users to rely on centrally-managed user stores for handling their user accounts. However, much software existing today does not have an innate understanding of such accounts. Instead, they commonly rely on membership in known groups for managing access-control (for example the "wheel" group on Fedora and RHEL systems or the "adm" group on Debian-derived systems). In the present incarnation of nsswitch, the only way to have such groups managed by a remote user store such as FreeIPA or Active Directory would be to manually remove the groups from /etc/group on the clients so that nsswitch would then move past nss_files and into the SSSD, nss-ldap or other remote user database. == Solution == With this patch, a new action is introduced for nsswitch: NSS_ACTION_MERGE. To take advantage of it, one will add [SUCCESS=merge] between two database entries in the nsswitch.conf file. When a group is located in the first of the two group entries, processing will continue on to the next one. If the group is also found in the next entry (and the group name and GID are an exact match), the member list of the second entry will be added to the group object to be returned. == Implementation == After each DL_LOOKUP_FN() returns, the next action is checked. If the function returned NSS_STATUS_SUCCESS and the next action is NSS_ACTION_MERGE, a copy of the result buffer is saved for the next pass through the loop. If on this next pass through the loop the database returns another instance of a group matching both the group name and GID, the member list is added to the previous list and it is returned as a single object. If the following database does not contain the same group, then the original is copied back into the destination buffer. This patch implements merge functionality only for the group database. For other databases, there is a default implementation that will return the EINVAL errno if a merge is requested. The merge functionality can be implemented for other databases at a later time if such is needed. Each database must provide a unique implementation of the deep-copy and merge functions. If [SUCCESS=merge] is present in nsswitch.conf for a glibc version that does not support it, glibc will process results up until that operation, at which time it will return results if it has found them or else will simply return an error. In practical terms, this ends up behaving like the remainder of the nsswitch.conf line does not exist. == Iterators == This feature does not modify the iterator functionality from its current behavior. If getgrnam() or getgrgid() is called, glibc will iterate through all entries in the `group` line in nsswitch.conf and display the list of members without attempting to merge them. This is consistent with the behavior of nss_files where if two separate lines are specified for the same group in /etc/groups, getgrnam()/getgrgid() will display both. Clients are already expected to handle this gracefully. == No Premature Optimizations == The following is a list of places that might be eligible for optimization, but were not overengineered for this initial contribution: * Any situation where a merge may occur will result in one malloc() of the same size as the input buffer. * Any situation where a merge does occur will result in a second malloc() to hold the list of pointers to member name strings. * The list of members is simply concatenated together and is not tested for uniqueness (which is identical to the behavior for nss_files, which will simply return identical values if they both exist on the line in the file. This could potentially be optimized to reduce space usage in the buffer, but it is both complex and computationally expensive to do so. == Testing == I performed testing by running the getent utility against my newly-built glibc and configuring /etc/nsswitch.conf with the following entry: group: group: files [SUCCESS=merge] sss In /etc/group I included the line: wheel:x:10:sgallagh I then configured my local SSSD using the id_provider=local to respond with: wheel:*:10:localuser,localuser2 I then ran `getent group wheel` against the newly-built glibc in multiple situations and received the expected output as described above: * When SSSD was running. * When SSSD was configured in nsswitch.conf but the daemon was not running. * When SSSD was configured in nsswitch.conf but nss_sss.so.2 was not installed on the system. * When the order of 'sss' and 'files' was reversed. * All of the above with the [SUCCESS=merge] removed (to ensure no regressions). * All of the above with `getent group 10`. * All of the above with `getent group` with and without `enumerate=true` set in SSSD. * All of the above with and without nscd enabled on the system.
2016-04-14Remove union wait [BZ #19613]Florian Weimer
The overloading approach in the W* macros was incompatible with integer expressions of a type different from int. Applications using union wait and these macros will have to migrate to the POSIX-specified int status type.
2016-04-08Fix limits.h NL_NMAX namespace (bug 19929).Joseph Myers
bits/xopen_lim.h (included by limits.h if __USE_XOPEN) defines NL_NMAX, but this constant was removed in the 2008 edition of POSIX so should not be defined in that case. This patch duly disables that define for __USE_XOPEN2K8. It remains enabled for __USE_GNU to avoid affecting sysconf (_SC_NL_NMAX), the implementation of which uses "#ifdef NL_NMAX". Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). [BZ #19929] * include/bits/xopen_lim.h (NL_NMAX): Do not define if [__USE_XOPEN2K8 && !__USE_GNU]. * conform/Makefile (test-xfail-XOPEN2K8/limits.h/conform): Remove variable.
2016-04-04strfmon_l: Use specified locale for number formatting [BZ #19633]Florian Weimer
2016-03-20hurd: Do not hide rtld symbols which need to be preemptedSamuel Thibault
* sysdeps/generic/dl-fcntl.h: New file, adds attribute_hidden to __open and __fcntl. * sysdeps/mach/hurd/dl-fcntl.h: New file, adds attribute_hidden to __fcntl only. * include/fcntl.h [IS_IN (rtld)]: Include <dl-fcntl.h> instead of adding attribute_hidden to __open and __fcntl.
2016-03-08Add sys/auxv.h wrapper to include/sys/Aurelien Jarno
The GNU libc testsuite fails to build on powerpc/ppc64/ppc64le with the following error: ../sysdeps/powerpc/test-get_hwcap.c:26:22: fatal error: sys/auxv.h: No such file or director This is because test-get_hwcap.c includes <sys/auxv.h>, but we don't provide a wrapper in include/sys. This patch adds one. Changelog: * include/sys/auxv.h: New file.
2016-03-07posix: New Linux posix_spawn{p} implementationAdhemerval Zanella
This patch implements a new posix_spawn{p} implementation for Linux. The main difference is it uses the clone syscall directly with CLONE_VM and CLONE_VFORK flags and a direct allocated stack. The new stack and start function solves most the vfork limitation (possible parent clobber due stack spilling). The remaning issue are related to signal handling: 1. That no signal handlers must run in child context, to avoid corrupt parent's state. 2. Child must synchronize with parent to enforce stack deallocation and to possible return execv issues. The first one is solved by blocking all signals in child, even NPTL-internal ones (SIGCANCEL and SIGSETXID). The second issue is done by a stack allocation in parent and a synchronization with using a pipe or waitpid (in case or error). The pipe has the advantage of allowing the child signal an exec error (checked with new tst-spawn2 test). There is an inherent race condition in pipe2 usage for architectures that do not support the syscall directly. In such cases the a pipe plus fctnl is used instead and it may lead to file descriptor leak in parent (as decribed by fcntl documentation). The child process stack is allocate with a mmap with MAP_STACK flag using default architecture stack size. Although it is slower than use a stack buffer from parent, it allows some slack for the compatibility code to run scripts with no shebang (which may use a buffer with size depending of argument list count). Performance should be similar to the vfork default posix implementation and way faster than fork path (vfork on mostly linux ports are basically clone with CLONE_VM plus CLONE_VFORK). The only difference is the syscalls required for the stack allocation/deallocation. It fixes BZ#10354, BZ#14750, and BZ#18433. Tested on i386, x86_64, powerpc64le, and aarch64. [BZ #14750] [BZ #10354] [BZ #18433] * include/sched.h (__clone): Add hidden prototype. (__clone2): Likewise. * include/unistd.h (__dup): Likewise. * posix/Makefile (tests): Add tst-spawn2. * posix/tst-spawn2.c: New file. * sysdeps/posix/dup.c (__dup): Add hidden definition. * sysdeps/unix/sysv/linux/aarch64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/alpha/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/hppa/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/i386/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/ia64/clone2.S (__clone): Likewise. * sysdeps/unix/sysv/linux/m68k/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/microblaze/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/mips/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/nios2/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sh/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/tile/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/x86_64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/nptl-signals.h (____nptl_is_internal_signal): New function. * sysdeps/unix/sysv/linux/spawni.c: New file.
2016-02-18Update version.h and include/features.h for 2.23 releaseglibc-2.23Adhemerval Zanella
2016-02-18Add _STRING_INLINE_unaligned and string_private.hH.J. Lu
As discussed in https://sourceware.org/ml/libc-alpha/2015-10/msg00403.html the setting of _STRING_ARCH_unaligned currently controls the external GLIBC ABI as well as selecting the use of unaligned accesses withing GLIBC. Since _STRING_ARCH_unaligned was recently changed for AArch64, this would potentially break the ABI in GLIBC 2.23, so split the uses and add _STRING_INLINE_unaligned to select the string ABI. This setting must be fixed for each target, while _STRING_ARCH_unaligned may be changed from release to release. _STRING_ARCH_unaligned is used unconditionally in glibc. But <bits/string.h>, which defines _STRING_ARCH_unaligned, isn't included with -Os. Since _STRING_ARCH_unaligned is internal to glibc and may change between glibc releases, it should be made private to glibc. _STRING_ARCH_unaligned should defined in the new string_private.h heade file which is included unconditionally from internal <string.h> for glibc build. [BZ #19462] * bits/string.h (_STRING_ARCH_unaligned): Renamed to ... (_STRING_INLINE_unaligned): This. * include/string.h: Include <string_private.h>. * string/bits/string2.h: Replace _STRING_ARCH_unaligned with _STRING_INLINE_unaligned. * sysdeps/aarch64/bits/string.h (_STRING_ARCH_unaligned): Removed. (_STRING_INLINE_unaligned): New. * sysdeps/aarch64/string_private.h: New file. * sysdeps/generic/string_private.h: Likewise. * sysdeps/m68k/m680x0/m68020/string_private.h: Likewise. * sysdeps/s390/string_private.h: Likewise. * sysdeps/x86/string_private.h: Likewise. * sysdeps/m68k/m680x0/m68020/bits/string.h (_STRING_ARCH_unaligned): Renamed to ... (_STRING_INLINE_unaligned): This. * sysdeps/s390/bits/string.h (_STRING_ARCH_unaligned): Renamed to ... (_STRING_INLINE_unaligned): This. * sysdeps/sparc/bits/string.h (_STRING_ARCH_unaligned): Renamed to ... (_STRING_INLINE_unaligned): This. * sysdeps/x86/bits/string.h (_STRING_ARCH_unaligned): Renamed to ... (_STRING_INLINE_unaligned): This.
2016-01-06Mark internal unistd functions hidden in ld.soH.J. Lu
Since internal unistd functions are only used internally in ld.so and libc.so, they can be made hidden. __close, __getcwd, __getpid, __libc_read and __libc_write can't be hidden in ld.so on Hurd since they will be preempted by the ones in libc.so after bootstrap. [BZ #19122] * include/unistd.h [IS_IN (rtld)]: Include <dl-unistd.h>. * sysdeps/generic/dl-unistd.h: New file. * sysdeps/mach/hurd/dl-unistd.h: Likewise.
2016-01-06Mark ld.so internal mmap functions hidden in ld.soH.J. Lu
Since ld.so internal mmap functions are only used internally in ld.so, they can be made hidden. Don't hide __mmap on Hurd, since __mmap in ld.so will be preempted by the one in libc.so after bootstrap. [BZ #19122] * include/sys/mman.h [IS_IN (rtld)]: Include <dl-mman.h>. * sysdeps/generic/dl-mman.h: New file. * sysdeps/mach/hurd/dl-mman.h: Likewise.
2016-01-04Update copyright dates with scripts/update-copyrights.Joseph Myers
2015-12-10Update to Unicode 8.0.0.Mike FABIAN
Update __STDC_ISO_10646__ to 201505L for Unicode 8.0.0. Update character encoding, ctype, and transliteration tables. New scripts autogenerate transliteration tables.
2015-11-24Refactor strtod parsing of NaN payloads.Joseph Myers
The nan* functions handle their string argument by constructing a NAN(...) string on the stack as a VLA and passing it to strtod functions. This approach has problems discussed in bug 16961 and bug 16962: the stack usage is unbounded, and it gives incorrect results in certain cases where the argument is not a valid n-char-sequence. The natural fix for both issues is to refactor the NaN payload parsing out of strtod into a separate function that the nan* functions can call directly, so that no temporary string needs constructing on the stack at all. This patch does that refactoring in preparation for fixing those bugs (but without actually using the new functions from nan* - which will also require exporting them from libc at version GLIBC_PRIVATE). This patch is not intended to change any user-visible behavior, so no tests are added (fixes for the above bugs will of course add tests for them). This patch builds on my recent fixes for strtol and strtod issues in Turkish locales. Given those fixes, the parsing of NaN payloads is locale-independent; thus, the new functions do not need to take a locale_t argument. Tested for x86_64, x86, mips64 and powerpc. * stdlib/strtod_nan.c: New file. * stdlib/strtod_nan_double.h: Likewise. * stdlib/strtod_nan_float.h: Likewise. * stdlib/strtod_nan_main.c: Likewise. * stdlib/strtod_nan_narrow.h: Likewise. * stdlib/strtod_nan_wide.h: Likewise. * stdlib/strtof_nan.c: Likewise. * stdlib/strtold_nan.c: Likewise. * sysdeps/ieee754/ldbl-128/strtod_nan_ldouble.h: Likewise. * sysdeps/ieee754/ldbl-128ibm/strtod_nan_ldouble.h: Likewise. * sysdeps/ieee754/ldbl-96/strtod_nan_ldouble.h: Likewise. * wcsmbs/wcstod_nan.c: Likewise. * wcsmbs/wcstof_nan.c: Likewise. * wcsmbs/wcstold_nan.c: Likewise. * stdlib/Makefile (routines): Add strtof_nan, strtod_nan and strtold_nan. * wcsmbs/Makefile (routines): Add wcstod_nan, wcstold_nan and wcstof_nan. * include/stdlib.h (__strtof_nan): Declare and use libc_hidden_proto. (__strtod_nan): Likewise. (__strtold_nan): Likewise. (__wcstof_nan): Likewise. (__wcstod_nan): Likewise. (__wcstold_nan): Likewise. * include/wchar.h (____wcstoull_l_internal): Declare. * stdlib/strtod_l.c: Do not include <ieee754.h>. (____strtoull_l_internal): Remove declaration. (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. (STRTOULL): Likewise. (____STRTOF_INTERNAL): Use STRTOF_NAN to parse NaN payload. * stdlib/strtof_l.c (____strtoull_l_internal): Remove declaration. (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. * sysdeps/ieee754/ldbl-128/strtold_l.c (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. * sysdeps/ieee754/ldbl-128ibm/strtold_l.c (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. * sysdeps/ieee754/ldbl-64-128/strtold_l.c (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. * sysdeps/ieee754/ldbl-96/strtold_l.c (STRTOF_NAN): Define macro. (SET_MANTISSA): Remove macro. * wcsmbs/wcstod_l.c (____wcstoull_l_internal): Remove declaration. * wcsmbs/wcstof_l.c (____wcstoull_l_internal): Likewise. * wcsmbs/wcstold_l.c (____wcstoull_l_internal): Likewise.
2015-11-20Fix lgamma setting signgam for ISO C (bug 15421).Joseph Myers
The lgamma (and likewise lgammaf, lgammal) function wrongly sets the signgam variable even when building for strict ISO C conformance (-std=c99 / -std=c11), although the user may define such a variable and it's only in the implementation namespace for POSIX with XSI extensions enabled. Following discussions starting at <https://sourceware.org/ml/libc-alpha/2013-04/msg00767.html> and <https://sourceware.org/ml/libc-alpha/2015-10/msg00844.html>, it seems that the safest approach for fixing this particular issue is for signgam to become a weak alias for a newly exported symbol __signgam, with the library functions only setting __signgam, at which point static linker magic will preserve the alias for newly linked binaries that refer to the library's signgam rather than defining their own, while breaking the alias for programs that define their own signgam, with new symbol versions for lgamma functions and with compat symbols for existing binaries that set both signgam and __signgam. This patch implements that approach for the fix. signgam is made into a weak alias. The four symbols __signgam, lgamma, lgammaf, lgammal get new symbol versions at version GLIBC_2.23, with the existing versions of lgamma, lgammaf and lgammal becoming compat symbols. When the compat versions are built, gamma, gammaf and gammal are aliases for the compat versions (i.e. always set signgam); this is OK as they are not ISO C functions, and avoids adding new symbol versions for them unnecessarily. When the compat versions are not built (i.e. for static linking and for future glibc ports), gamma, gammaf and gammal are aliases for the new versions that set __signgam. The ldbl-opt versions are updated accordingly. The lgamma wrappers are adjusted so that the same source files, included from different files with different definitions of USE_AS_COMPAT, can build either the new versions or the compat versions. Similar changes are made to the ia64 versions (untested). Tests are added that the lgamma functions do not interfere with a user variable called signgam for ISO C, with various choices for the size of that variable, whether it is initialized, and for static and dynamic linking. The conformtest whitelist entry is removed as well. Tested for x86_64, x86, mips64 and powerpc, including looking at objdump --dynamic-syms output to make sure the expected sets of symbols were aliases. Also spot-tested that a binary built with old glibc works properly (i.e. gets signgam set) when run with new glibc. [BZ #15421] * sysdeps/ieee754/s_signgam.c (signgam): Rename to __signgam, initialize with 0 and define as weak alias of __signgam. * include/math.h [!_ISOMAC] (__signgam): Declare. * math/Makefile (libm-calls): Add w_lgamma_compat. (tests): Add test-signgam-uchar, test-signgam-uchar-init, test-signgam-uint, test-signgam-uint-init, test-signgam-ullong and test-signgam-ullong-init. (tests-static): Add test-signgam-uchar-static, test-signgam-uchar-init-static, test-signgam-uint-static, test-signgam-uint-init-static, test-signgam-ullong-static and test-signgam-ullong-init-static. (CFLAGS-test-signgam-uchar.c): New variable. (CFLAGS-test-signgam-uchar-init.c): Likewise. (CFLAGS-test-signgam-uchar-static.c): Likewise. (CFLAGS-test-signgam-uchar-init-static.c): Likewise. (CFLAGS-test-signgam-uint.c): Likewise. (CFLAGS-test-signgam-uint-init.c): Likewise. (CFLAGS-test-signgam-uint-static.c): Likewise. (CFLAGS-test-signgam-uint-init-static.c): Likewise. (CFLAGS-test-signgam-ullong.c): Likewise. (CFLAGS-test-signgam-ullong-init.c): Likewise. (CFLAGS-test-signgam-ullong-static.c): Likewise. (CFLAGS-test-signgam-ullong-init-static.c): Likewise. * math/Versions (libm): Add GLIBC_2.23. * math/lgamma-compat.h: New file. * math/test-signgam-main.c: Likewise. * math/test-signgam-uchar-init-static.c: Likewise. * math/test-signgam-uchar-init.c: Likewise. * math/test-signgam-uchar-static.c: Likewise. * math/test-signgam-uchar.c: Likewise. * math/test-signgam-uint-init-static.c: Likewise. * math/test-signgam-uint-init.c: Likewise. * math/test-signgam-uint-static.c: Likewise. * math/test-signgam-uint.c: Likewise. * math/test-signgam-ullong-init-static.c: Likewise. * math/test-signgam-ullong-init.c: Likewise. * math/test-signgam-ullong-static.c: Likewise. * math/test-signgam-ullong.c: Likewise. * math/w_lgamma.c: Rename to w_lgamma_main.c and replace by wrapper of w_lgamma_main.c. * math/w_lgamma_compat.c: New file. * math/w_lgamma_compatf.c: Likewise. * math/w_lgamma_compatl.c: Likewise. * math/w_lgamma_main.c: New file. Based on w_lgamma.c. Include <lgamma-compat.h>. Condition contents on [BUILD_LGAMMA]. Support defining compatibility symbols. (__lgamma): Change to LGFUNC (__lgamma). Use CALL_LGAMMA. * math/w_lgammaf.c: Rename to w_lgammaf_main.c and replace by wrapper of w_lgammaf_main.c. * math/w_lgammaf_main.c: New file. Based on w_lgammaf.c. Include <lgamma-compat.h>. Condition contents on [BUILD_LGAMMA]. Support defining compatibility symbols. (__lgammaf): Change to LGFUNC (__lgammaf). Use CALL_LGAMMA. * math/w_lgammal.c: Rename to w_lgammal_main.c and replace by wrapper of w_lgammal_main.c. * math/w_lgammal_main.c: New file. Based on w_lgammal.c. Include <lgamma-compat.h>. Condition contents on [BUILD_LGAMMA]. Support defining compatibility symbols. (__lgammal): Change to LGFUNC (__lgammal). Use CALL_LGAMMA. * sysdeps/ia64/fpu/lgamma-compat.h: New file. * sysdeps/ia64/fpu/w_lgamma.c: Move to .... * sysdeps/ia64/fpu/w_lgamma_main.c: ...here. Include <lgamma-compat.h>. (__ieee754_lgamma): Change to LGFUNC (lgamma). Use CALL_LGAMMA. (__ieee754_gamma): Define as alias. * sysdeps/ia64/fpu/w_lgammaf.c: Move to .... * sysdeps/ia64/fpu/w_lgammaf_main.c: ...here. Include <lgamma-compat.h>. (__ieee754_lgammaf): Change to LGFUNC (lgammaf). Use CALL_LGAMMA. (__ieee754_gammaf): Define as alias. * sysdeps/ia64/fpu/w_lgammal.c: Move to .... * sysdeps/ia64/fpu/w_lgammal_main.c: ...here. Include <lgamma-compat.h>. (__ieee754_lgammal): Change to LGFUNC (lgammal). Use CALL_LGAMMA. (__ieee754_gammal): Define as alias. * sysdeps/ieee754/ldbl-opt/w_lgamma.c: Move to .... * sysdeps/ieee754/ldbl-opt/w_lgamma_compat.c: ...here. Include <math/w_lgamma_compat.c>. [LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)] (__lgammal_dbl_compat): Define as alias of __lgamma_compat and use in defining lgammal. * sysdeps/ieee754/ldbl-opt/w_lgammal.c: Move to .... * sysdeps/ieee754/ldbl-opt/w_lgamma_compatl.c: ...here. Include <math/lgamma-compat.h> and <math/w_lgamma_compatl.c>. (USE_AS_COMPAT): New macro. (LGAMMA_OLD_VER): Undefine and redefine. (lgammal): Do not define here. (gammal): Only define here if [GAMMA_ALIAS]. * conform/linknamespace.pl (@whitelist): Remove signgam. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2015-11-05Fix features.h for -Wundef (bug 19212).Joseph Myers
features.h is not clean with -Wundef (for the installed header, of course this only appears with -Wsystem-headers). In ISO C standards modes, you get a series of warnings / errors relating to _POSIX_C_SOURCE and _XOPEN_SOURCE not being defined when tested in standards mode and uses #undef _GNU_SOURCE to avoid the default _GNU_SOURCE from libc-symbols.h. This patch changes the relevant #if conditionals to avoid these warnings / errors. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). [BZ #19212] * include/features.h [(_XOPEN_SOURCE - 0) >= 500]: Change conditional to [defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) >= 500]. [_POSIX_C_SOURCE >= 1]: Change conditional to [defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 1]. [(_POSIX_C_SOURCE - 0) >= 199309L]: Change conditional to [defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199309L]. [(_POSIX_C_SOURCE - 0) >= 199506L]: Change conditional to [defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199506L]. [(_POSIX_C_SOURCE - 0) >= 200112L]: Change conditional to [defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200112L]. [(_POSIX_C_SOURCE - 0) >= 200809L]: Change conditional to [defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200809L].
2015-10-29Use max_align_t from <stddef.h>.Joseph Myers
Now that we build with -std=gnu11 and can rely on a compiler providing max_align_t in <stddef.h>, we no longer need our own version libc_max_align_t. This patch removes it and replaces the single user with a use of max_align_t. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch for x86_64; for x86, I see some code reordering of no significance). * include/libc-internal.h (libc_max_align_t): Remove typedef. * include/scratch_buffer.h: Include <stddef.h> instead of <libc-internal.h>. (struct scratch_buffer): Use max_align_t instead of libc_max_align_t.
2015-10-19Mark ld.so internel __fxstatat64 hiddenH.J. Lu
Since ld.so internel __fxstatat64 is only used internally in ld.so, it can be made hidden. [BZ #19122] * include/sys/stat.h [IS_IN (rtld)] (__fxstatat64): Add attribute_hidden.
2015-10-19Remove .weak, .weakext configure tests.Joseph Myers
There are configure tests for assembler .weak support, and, as a fallback, for .weakext support. .weakext appears to be an ECOFF thing (although a few ELF targets support it as well). .weak has been supported by the GNU assembler for ELF targets since version 2.2, so given the requirement for ELF the configure tests are obsolete; this patch removes them. Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_weak_directive): Remove configure test. (libc_cv_asm_weakext_directive): Likewise. * configure: Regenerated. * config.h.in (HAVE_ASM_WEAK_DIRECTIVE): Remove #undef. (HAVE_ASM_WEAKEXT_DIRECTIVE): Likewise. * include/libc-symbols.h [!HAVE_ASM_WEAK_DIRECTIVE && !HAVE_ASM_WEAKEXT_DIRECTIVE]: Remove #error. [HAVE_ASM_WEAKEXT_DIRECTIVE]: Remove conditional code. [!HAVE_ASM_WEAKEXT_DIRECTIVE]: Make code unconditional.
2015-10-17Assume that SOCK_CLOEXEC is available and worksFlorian Weimer
This fixes (harmless) data races when accessing the various __have_sock_cloexec variables.
2015-10-15Mark ld.so internel __uname hiddenH.J. Lu
Since ld.so internel __uname is only used internally in ld.so, it can be made hidden. [BZ #19122] * include/sys/utsname.h [IS_IN (rtld)] (__uname): Add attribute_hidden.
2015-10-15Mark ld.so internel string functions hiddenH.J. Lu
Since ld.so internel string functions are only used internally in ld.so, they can be made hidden. [BZ #19122] * include/string.h [IS_IN (rtld)] (__stpcpy): Add attribute_hidden. [IS_IN (rtld)] (__strdup): Likewise. [IS_IN (rtld)] (__strerror_r): Likewise. [IS_IN (rtld)] (__strsep_g): Likewise. [IS_IN (rtld)] (memchr): Likewise. [IS_IN (rtld)] (memcmp): Likewise. [IS_IN (rtld)] (memcpy): Likewise. [IS_IN (rtld)] (memmove): Likewise. [IS_IN (rtld)] (memset): Likewise. [IS_IN (rtld)] (rawmemchr): Likewise. [IS_IN (rtld)] (stpcpy): Likewise. [IS_IN (rtld)] (strchr): Likewise. [IS_IN (rtld)] (strcmp): Likewise. [IS_IN (rtld)] (strlen): Likewise. [IS_IN (rtld)] (strnlen): Likewise. [IS_IN (rtld)] (strsep): Likewise.
2015-10-15Mark ld.so internel stdlib functions hiddenH.J. Lu
Since ld.so internel stdlib functions are only used internally in ld.so, they can be made hidden. [BZ #19122] * include/stdlib.h [IS_IN (rtld)] (unsetenv): Add attribute_hidden. [IS_IN (rtld)] (__strtoul_internal): Likewise.
2015-10-15Mark ld.so internel sigaction functions hiddenH.J. Lu
Since ld.so internel sigaction functions are only used internally in ld.so, they can be made hidden. [BZ #19122] * include/signal.h [IS_IN (rtld)] (__sigaction): Add attribute_hidden. [IS_IN (rtld)] (__libc_sigaction): Likewise.
2015-10-15Mark internal setjmp functions hiddenH.J. Lu
Since internal dirent functions are only used internally in ld.so and libc.so, they can be made hidden. [BZ #19122] * include/setjmp.h (__longjmp): Add attribute_hidden. [IS_IN (rtld)] (__sigsetjmp): Likewise.
2015-10-15Mark ld.so internel __profile_frequency hiddenH.J. Lu
Since ld.so internel __profile_frequency is only used internally in ld.so, it can be made hidden. [BZ #19122] * include/libc-internal.h [IS_IN (rtld)] (__profile_frequency): Add attribute_hidden.
2015-10-15Mark internal fcntl functions hiddenH.J. Lu
Since internal fcntl functions are only used internally in ld.so and libc.so, they can be made hidden. [BZ #19122] * include/fcntl.h (__libc_fcntl): Add attribute_hidden. [IS_IN (rtld)] (__open): Likewise. [IS_IN (rtld)] (__fcntl): Likewise.
2015-10-15Mark internal dirent functions hiddenH.J. Lu
Since internal dirent functions are only used internally in ld.so and libc.so, they can be made hidden. [BZ #19122] * include/dirent.h (__opendirat): Add attribute_hidden. (__getdents): Likewise. (__getdents64): Likewise. (__alloc_dir): Likewise. [IS_IN (rtld)] (__closedir): Likewise. [IS_IN (rtld)] (__fdopendir): Likewise. [IS_IN (rtld)] (__readdir): Likewise. [IS_IN (rtld)] (__readdir64): Likewise. [IS_IN (rtld)] (__rewinddir): Likewise.
2015-10-15Mark _dl_catch_error hiddenH.J. Lu
Since _dl_catch_error is only used internally in ld.so, it should be declared in sysdeps/generic/ldsodefs.h, not include/dlfcn.h and it can be made hidden. [BZ #19122] * include/dlfcn.h (_dl_catch_error): Moved to ... * sysdeps/generic/ldsodefs.h (_dl_catch_error): Add attribute_hidden.
2015-10-15Remove .previous, .popsection configure tests.Joseph Myers
There is a configure test for the assembler .previous directive, and, as a fallback, for .popsection. glibc now only supports ELF. For ELF, the GNU assembler has supported .previous since version 2.2 (support added by Mon Jul 19 15:21:20 1993 Ken Raeburn (raeburn@rtl.cygnus.com) * config/obj-elf.c (obj_elf_previous): New function. (previous_section, previous_subsection): New vars. (obj_elf_section): Save current place in case DWARF code wants us to pop back to it. Handle unquoted section name as well as quoted section name. Don't crash on invalid strings. (obj_pseudo_table): Handle new pseudos "previous", "2byte", and "4byte". ). Thus this configure test is obsolete, and this patch removes it (and with it the fallback .popsection test). Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_previous_directive): Remove configure test. (libc_cv_asm_popsection_directive): Likewise. * configure: Regenerated. * config.h.in (HAVE_ASM_PREVIOUS_DIRECTIVE): Remove #undef. (HAVE_ASM_POPSECTION_DIRECTIVE): Likewise. * include/libc-symbols.h [HAVE_ASM_PREVIOUS_DIRECTIVE] (__make_section_unallocated): Make definition unconditional. [HAVE_ASM_POPSECTION_DIRECTIVE] (__make_section_unallocated): Remove conditional definition. [!HAVE_ASM_PREVIOUS_DIRECTIVE && !HAVE_ASM_POPSECTION_DIRECTIVE] (__make_section_unallocated): Likewise.
2015-10-14include/stap-probe.h: Fix formatting.Carlos O'Donell
Fix macro indentation.
2015-10-02Harden putpwent, putgrent, putspent, putspent against injection [BZ #18724]Florian Weimer
This prevents injection of ':' and '\n' into output functions which use the NSS files database syntax. Critical fields (user/group names and file system paths) are checked strictly. For backwards compatibility, the GECOS field is rewritten instead. The getent program is adjusted to use the put*ent functions in libc, instead of local copies. This changes the behavior of getent if user names start with '-' or '+'.
2015-09-18Since we now inline isinf, isnan and isfinite in math.h, replace uses of ↵Wilco Dijkstra
__isinf_ns(l/f) with isinf, and remove the unused inlines __isinf_ns(l/f), __isnan(f) and __finite(f). 2015-09-18 Wilco Dijkstra <wdijkstr@arm.com> * include/math.h: Remove __isinf_ns, __isinf_nsf, __isinf_nsl. * math/Makefile: Remove isinf_ns.c. * math/divtc3.c (__divtc3): Replace __isinf_nsl with isinf. * math/multc3.c (__multc3): Likewise. * math/s_casin.c (__casin): Likewise. * math/s_casinf.c (__casinf): Likewise. * math/s_casinl.c (__casinl): Likewise. * math/s_cproj.c (__cproj): Likewise. * math/s_cprojf.c (__cprojf): Likewise. * math/s_cprojl.c (__cprofl): Likewise. * math/s_ctan.c (__ctan): Likewise. * math/s_ctanf.c (__ctanf): Likewise. * math/s_ctanh.c (__ctanh): Likewise. * math/s_ctanhf.c (__ctanhf): Likewise. * math/s_ctanhl.c (__ctanhl): Likewise. * math/s_ctanl.c (__ctanl): Likewise. * math/w_fmod.c (__fmod): Likewise. * math/w_fmodf.c (__fmodf): Likewise. * math/w_fmodl.c (_fmodl): Likewise. * math/w_remainder.c (__remainder): Likewise. * math/w_remainderf.c (__remainderf): Likewise. * math/w_remainderl.c (__remainderl): Likewise. * math/w_scalb.c (__scalb): Likewise. * math/w_scalbf.c (__scalbf): Likewise. * math/w_scalbl.c (__scalbl): Likewise. * sysdeps/ieee754/dbl-64/s_isinf_ns.c: Deleted file. * sysdeps/ieee754/dbl-64/s_sincos.c (__sincos): Replace __isinf_ns with isinf. * sysdeps/ieee754/dbl-64/wordsize-64/math_private.h: Deleted file. * sysdeps/ieee754/dbl-64/wordsize-64/s_isinf_ns.c: Deleted file. * sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Replace __isinf_nsf with isinf. * sysdeps/ieee754/flt-32/math_private.h: Deleted file. * sysdeps/ieee754/flt-32/s_isinf_nsf.c: Deleted file. * sysdeps/ieee754/ldbl-128/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-128/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_cprojl.c(__cprojll): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_ctanl.c(__ctanl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-128ibm/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-128ibm/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf. * sysdeps/ieee754/ldbl-96/s_isinf_nsl.c: Deleted file. * sysdeps/ieee754/ldbl-96/s_sincosl.c (__sincosl): Replace __isinf_nsl with isinf.
2015-09-15Mark fegetround pure (bug 16296).Joseph Myers
Bug 16296 notes that fegetround is a pure function and should be marked as such in fenv.h. This patch implements that. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by this patch). [BZ #16296] * math/fenv.h (fegetround): Use __attribute_pure__. * include/fenv.h (__fegetround): Likewise.
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