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2017-04-20Fix missing timespec definition for sys/stat.h (BZ #21371)Adhemerval Zanella
As indicated by the bug report, the 'struct timespec' definition is not defined for '_XOPEN_SOURCE=700' and '_POSIX_C_SOURCE=200112L'. It is because current code only includes its definition if __USE_ATFILE is defined and the define is only set with: 1. _GNU_SOURCE and/or _ATFILE_SOURCE definition. 2. _POSIX_C_SOURCE >= 200809L However, the 'st_*' fields in 'struct stat' are defined if __USE_XOPEN2K8. This patch uses the same logic for 'struct timespec' inclusion. Tested on x86_64-linux-gnu. * io/sys/stat.h: Use __USE_XOPEN2K8 insteaf of __USE_ATFILE for struct timespec definition.
2017-04-19nss_dns: Correct parentheses for the __glibc_unlikely argumentFlorian Weimer
This fixes commit bee05c9d58a34ec5886faf3b56ecaa56355d94bf.
2017-04-19rcmd/rexec: Fix typo in commentFlorian Weimer
2017-04-19A third round of inclusion fixes for _ISOMAC testsuite.Zack Weinberg
* posix/tst-mmap-offset.c: Include stdint.h. * resolv/tst-ns_name_compress.c: Include string.h. * resolv/tst-resolv-edns.c: Include resolv.h.
2017-04-19resolv: Replace __builtin_expect with __glibc_unlikely/__glibc_likelyFlorian Weimer
2017-04-19Bug 21399: Fix CP1254 comment for U+00ECChristopher Chittleborough
2017-04-19Create more sockets with SOCK_CLOEXEC [BZ #15722]Florian Weimer
2017-04-19Assume that accept4 is always available and worksFlorian Weimer
Simplify the Linux accept4 implementation based on the assumption that it is available in some way. __ASSUME_ACCEPT4_SOCKETCALL was previously unused, so remove it. For ia64, the accept4 system call (and socket call) were backported in kernel version 3.2.18. Reflect this in the installation instructions.
2017-04-18conformtest: Enable tests when cross compiling.Joseph Myers
This patch enables the compilation part of the conformtest tests (the vast bulk of them) when cross compiling, so making it easy to run them across many configurations with build-many-glibcs.py. Tested with build-many-glibcs.py. * conform/Makefile (tests-special): Do not make addition of $(conformtest-header-tests) conditional on [$(cross-compiling) = no]. (generated): Do not make addition of $(conformtest-header-base) conditional on [$(cross-compiling) = no].
2017-04-18Fix bits/socket.h IOC* namespace issues (bug 21267).Joseph Myers
sysdeps/unix/sysv/linux/bits/socket.h includes asm/socket.h. That includes asm/sockios.h, which on MIPS includes asm/ioctl.h, resulting in namespace violations from IOC* macros. bits/socket.h already has code to handle asm/socket.h unconditionally defining macros that are only wanted for __USE_MISC. This patch extends it to handle the IOC* macros as well (always undefining them if not defined when bits/socket.h was included, as I don't think they are part of the intended API even for __USE_MISC). It's possible there should also be a kernel fix - it's not clear to me that IOC* belong in the uapi headers, and even if they do they might best be split out into another header to avoid getting defined by this particular path. But since glibc needs to deal with existing kernel headers, it also seems appropriate to extend the existing workaround to these macros. Tested (compilation only) with build-many-glibcs.py. [BZ #21267] * sysdeps/unix/sysv/linux/bits/socket.h (IOCSIZE_MASK): Undefine if defined by <asm/socket.h> and not previously defined. (IOCSIZE_SHIFT): Likewise. (IOC_IN): Likewise. (IOC_INOUT): Likewise. (IOC_OUT): Likewise.
2017-04-18x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396]H.J. Lu
On Skylake server, AVX512 load/store instructions in memcpy/memset may lead to lower CPU turbo frequency in certain situations. Use of AVX2 in memcpy/memset has been observed to have improved overall performance in many workloads due to the higher frequency. Since AVX512ER is unique to Xeon Phi, this patch sets Prefer_No_AVX512 if AVX512ER isn't available so that AVX2 versions of memcpy/memset are used on Skylake server. [BZ #21396] * sysdeps/x86/cpu-features.c (init_cpu_features): Set Prefer_No_AVX512 if AVX512ER isn't available. * sysdeps/x86/cpu-features.h (bit_arch_Prefer_No_AVX512): New. (index_arch_Prefer_No_AVX512): Likewise. * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Don't use AVX512 version if Prefer_No_AVX512 is set. * sysdeps/x86_64/multiarch/memcpy_chk.S (__memcpy_chk): Likewise. * sysdeps/x86_64/multiarch/memmove.S (__libc_memmove): Likewise. * sysdeps/x86_64/multiarch/memmove_chk.S (__memmove_chk): Likewise. * sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Likewise. * sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk): Likewise. * sysdeps/x86_64/multiarch/memset.S (memset): Likewise. * sysdeps/x86_64/multiarch/memset_chk.S (__memset_chk): Likewise.
2017-04-18x86: Set Prefer_No_VZEROUPPER if AVX512ER is availableH.J. Lu
AVX512ER won't be implemented in any Xeon processors and will be in all Xeon Phi processors. Don't check CPU model number when setting Prefer_No_VZEROUPPER for Xeon Phi. Instead, set Prefer_No_VZEROUPPER if AVX512ER is available. It works with current and future Xeon Phi and non-Xeon Phi processors. * sysdeps/x86/cpu-features.c (init_cpu_features): Set Prefer_No_VZEROUPPER if AVX512ER is available. * sysdeps/x86/cpu-features.h (bit_cpu_AVX512PF): New. (bit_cpu_AVX512ER): Likewise. (bit_cpu_AVX512CD): Likewise. (bit_cpu_AVX512BW): Likewise. (bit_cpu_AVX512VL): Likewise. (index_cpu_AVX512PF): Likewise. (index_cpu_AVX512ER): Likewise. (index_cpu_AVX512CD): Likewise. (index_cpu_AVX512BW): Likewise. (index_cpu_AVX512VL): Likewise. (reg_AVX512PF): Likewise. (reg_AVX512ER): Likewise. (reg_AVX512CD): Likewise. (reg_AVX512BW): Likewise. (reg_AVX512VL): Likewise.
2017-04-18Assume that O_CLOEXEC is always defined and worksFlorian Weimer
2017-04-18Assume that dup3 is availableFlorian Weimer
2017-04-18Assume that pipe2 is always availableFlorian Weimer
The Debian patches for Hurd (which are already required to build glibc before this commit) contain an implementation of pipe2.
2017-04-18malloc: Turn cfree into a compatibility symbolFlorian Weimer
2017-04-18powerpc64: strrchr optimization for power8Rajalakshmi Srinivasaraghavan
P7 code is used for <=32B strings and for > 32B vectorized loops are used. This shows as an average 25% improvement depending on the position of search character. The performance is same for shorter strings. Tested on ppc64 and ppc64le.
2017-04-17[BZ 21357] unwind-dw2-fde: Call free() outside of unwind mutexRabin Vincent
__deregister_frame_info_bases() calls free() while holding a mutex which is also used from _Unwind_Find_FDE(). This leads to a deadlock if AddressSanitizer uses _Unwind_Backtrace() from its free() implementation. Checked on mips-linux-gnu and x86_64-linux-gnu. [BZ #21357] * sysdeps/generic/unwind-dw2-fde.c (__deregister_frame_info_bases): Call free() outside of mutex.
2017-04-13Assume that O_NOFOLLOW is always definedFlorian Weimer
2017-04-13resolv: Remove EDNS fallback [BZ #21369]Florian Weimer
EDNS is disabled by default (so there is interoperability issue), and the fallback code is problematic because it prevents an application from obtaining DNSSEC data after a FORMERR response.
2017-04-13resolv: Reduce EDNS payload size to 1200 bytes [BZ #21361]Florian Weimer
This hardens the stub resolver against fragmentation-based attacks.
2017-04-13resolv: Support an exactly sized buffer in ns_name_pack [BZ #21359]Florian Weimer
This bug did not affect name resolution because those functions indirectly call ns_name_pack with a buffer which is always larger than the generated query packet, even in the case of the longest-possible domain name.
2017-04-13resolv: Remove internal and unused definitions from <resolv.h>Florian Weimer
The RES_F_* constants are only used with the private _res._flags member. RES_EXHAUSTIVE is unused. The removed function declarations refer to functions not actually exported by glibc, so they are unusable by applications.
2017-04-13powerpc: Optimized strncat for POWER8Rajalakshmi Srinivasaraghavan
With new optimized strnlen for POWER8 [1], this patch adds strncat for power8 to make use of optimized strlen and strnlen. This is faster than POWER7 current implementation for larger strings. Tested on powerpc64 and powerpc64le. [1] https://sourceware.org/ml/libc-alpha/2017-03/msg00491.html * sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add strncat-power8. * sysdeps/powerpc/powerpc64/multiarch/strncat.c (strncat): Add __strncat_power8 to ifunc list. * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c (strncat): Add __strncat_power8 to list of strncat functions. * sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c: New file.
2017-04-12Consolidate Linux mmap implementation (BZ#21270)Adhemerval Zanella
This patch consolidates all Linux mmap implementations on default sysdeps/unix/sysv/linux/mmap{64}.c one. To accomodate all required architecture specific requeriments a new internal header is created (mmap_internal.h) where each architecture add its specific code requirements. Currently only x86_64 (to define MMAP_PREPARE to add MAP_32BITS), s390 (which have a different kernel ABI for mmap), m68k (which have variable minimum page sizes), and MIPS n32 (which zero extend the offset to handle negative one correctly) redefine the new header. The patch also fixes BZ#21270 where default mmap64 on architectures which uses mmap2 silent truncates large offsets value (larger than 1 << (page shift + 8 * sizeof (off_t)) or 1<<44 on architectures with 4096 bytes page size). The new consolidate implementation returns EINVAL as allowed by POSIX. It also adds a tests for on current tst-mmap-offset one. I have run a full make check on x86_64, x86_64-32, i686, aarch64, armhf, powerpc, powerpc64le, sparc64, and sparcv9 without any regressions. I also ran some basic tests (tst-mmap-offset) on sh4, m68k, and on qemu simulated MIPS32 and MIPS64. [BZ #21270] * posix/tst-mmap-offset.c (do_prepare): New function. (do_test): Rename to do_test_bz18877 and use FAIL_RET. (do_test_bz21270): New function. * sysdeps/unix/sysv/linux/aarch64/mmap.c: Remove file. * sysdeps/unix/sysv/linux/arm/mmap.c: Remove file. * sysdeps/unix/sysv/linux/generic/wordsize-32/mmap.c: Likewise. * sysdeps/unix/sysv/linux/hppa/mmap.c: Likewise. * sysdeps/unix/sysv/linux/i386/mmap.c: Likewise. * sysdeps/unix/sysv/linux/m68k/mmap.S: Likewise. * sysdeps/unix/sysv/linux/m68k/mmap64.c: Likewise. * sysdeps/unix/sysv/linux/microblaze/mmap.S: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/mmap.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/mmap.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/mmap64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/mmap.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/mmap.S: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/mmap.c: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/mmap64.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/mmap.c: Likewise. * sysdeps/unix/sysv/linux/mmap_internal.h: New file. * sysdeps/unix/sysv/linux/m68k/mmap_internal.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/mmap_internal.h: Likewise. * sysdeps/unix/sysv/linux/s390/mmap_internal.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list: Remove mmap from auto-generation list. * sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/mmap.c: New file. * sysdeps/unix/sysv/linux/mmap64.c (__mmap64): Add check for invalid offsets and support for mmap2 syscall.
2017-04-12posix: Add cleanup on the trap list for globtest.shAdhemerval Zanella
This patch prevents lingering files for SIGSEGV failures by adding a cleanup handler on trap handler. Checked on x86_64-linux-gnu. * posix/globtest.sh: Add cleanup routine on trap 0.
2017-04-11powerpc: refactor memcmp and memmove IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memmove-power7.S: Likewise. * sysdeps/powerpc/powerpc64/power4/memcmp.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power7/memcmp.S: Likewise. * sysdeps/powerpc/powerpc64/power7/memmove.S: Likewise.
2017-04-11powerpc: refactor memcpy and mempcpy IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/memcpy-a2.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/memcpy-cell.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memcpy-power4.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memcpy-power6.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memcpy-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S: Likewise. * sysdeps/powerpc/powerpc64/a2/memcpy.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/cell/memcpy.S: Likewise. * sysdeps/powerpc/powerpc64/memcpy.S: Likewise. * sysdeps/powerpc/powerpc64/power4/memcpy.S: Likewise. * sysdeps/powerpc/powerpc64/power6/memcpy.S: Likewise. * sysdeps/powerpc/powerpc64/power7/memcpy.S: Likewise. * sysdeps/powerpc/powerpc64/power7/mempcpy.S: Likewise.
2017-04-11powerpc: refactor memchr, memrchr, and rawmemchr IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/memrchr-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/rawmemchr-power7.S: Likewise. * sysdeps/powerpc/powerpc64/power7/memchr.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power7/memrchr.S: Likewise. * sysdeps/powerpc/powerpc64/power7/rawmemchr.S: Likewise.
2017-04-11powerpc: refactor memset IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/memset-power4.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/memset-power6.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memset-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memset-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/memset.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power4/memset.S: Likewise. * sysdeps/powerpc/powerpc64/power6/memset.S: Likewise. * sysdeps/powerpc/powerpc64/power7/memset.S: Likewise. * sysdeps/powerpc/powerpc64/power8/memset.S: Likewise.
2017-04-11powerpc: refactor strcasestr and strstr IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S: Define the strcasestr implementation name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/strstr-power7.S: Define strstr implementation name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/power7/strstr.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power8/strcasestr.S: Likewise.
2017-04-11powerpc: refactor strchr, strchrnul, and strrchr IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strchrnul-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strrchr-power7.S: Likewise. * sysdeps/powerpc/powerpc64/power7/strchr.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power7/strchrnul.S: Likewise. * sysdeps/powerpc/powerpc64/power7/strrchr.S: Likewise. * sysdeps/powerpc/powerpc64/power8/strchr.S: Likewise. * sysdeps/powerpc/powerpc64/strchr.S: Likewise.
2017-04-11powerpc: refactor strnlen and strlen IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/strlen-power7.S: Define the strlen implementation name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/strlen-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strnlen-power7.S: Define the strnlen implementation name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/power7/strlen.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power7/strnlen.S: Likewise. * sysdeps/powerpc/powerpc64/power8/strlen.S: Likewise. * sysdeps/powerpc/powerpc64/strlen.S: Likewise.
2017-04-11powerpc: refactor strcasecmp, strcmp, and strncmp IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l-power7.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/strcmp-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strcmp-power8.S Likewise. * sysdeps/powerpc/powerpc64/multiarch/strcmp-power9.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncmp-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncmp-power9.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S: Likewise. * sysdeps/powerpc/powerpc64/power4/strncmp.S: Set a default function name if not defined and pass as parameter to macros accordingly. * sysdeps/powerpc/powerpc64/power7/strcmp.S: Likewise. * sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise. * sysdeps/powerpc/powerpc64/power8/strcmp.S: Likewise. * sysdeps/powerpc/powerpc64/power8/strncmp.S: Likewise. * sysdeps/powerpc/powerpc64/power9/strcmp.S: Likewise. * sysdeps/powerpc/powerpc64/power9/strncmp.S: Likewise. * sysdeps/powerpc/powerpc64/strcmp.S: Likewise. * sysdeps/powerpc/powerpc64/strncmp.S: Likewise.
2017-04-11powerpc: refactor stpcpy, stpncpy, strcpy, and strncpy IFUNC.Wainer dos Santos Moschetta
Clean up the IFUNC implementations for powerpc in order to remove unneeded macro definitions. Tested on ppc64le with and without --disable-multi-arch flag. * sysdeps/powerpc/powerpc64/multiarch/stpcpy-power8.S: Define the implementation-specific function name and remove unneeded macros definition. * sysdeps/powerpc/powerpc64/multiarch/stpncpy-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/stpncpy-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strcpy-power8.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncpy-power7.S: Likewise. * sysdeps/powerpc/powerpc64/multiarch/strncpy-power8.S: Likewise. * sysdeps/powerpc/powerpc64/power7/strncpy.S: Set a default function name if not defined. * sysdeps/powerpc/powerpc64/power8/strcpy.S: Likewise. * sysdeps/powerpc/powerpc64/power8/strncpy.S: Likewise.
2017-04-11Support auxilliary vector components for cache geometries.Paul Clarke
Add support to getauxval() for new types to get L1, L2, L3 cache sizes, cache line sizes, and cache associativities. The new types for getauxval() were added in the stream for Linux kernel v4.11 in commit 98a5f361b8625c6f4841d6ba013bbf0e80d08147. * elf/elf.h (AT_L1I_CACHESIZE, AT_L1I_CACHEGEOMETRY, AT_L1D_CACHESIZE, AT_L1D_CACHEGEOMETRY, AT_L2_CACHESIZE, AT_L2_CACHEGEOMETRY, AT_L3_CACHESIZE, AT_L3_CACHEGEOMETRY): New. Add auxvec identifiers from kernel arch/powerpc/include/uapi/asm/auxvec.h.
2017-04-11manual: readdir, readdir64 are thread-safeFlorian Weimer
They only modify the state in the dirstream argument, and we generally do not treat this as a reason to mark a function as not thread-safe. For an example, see random_r, which is marked as thread-safe even though the random state is not protected by a lock.
2017-04-10Consolidate pthreadtype.h placementConsolidate pthreadtype.h placementAdhemerval Zanella
This patch moves all arch specific pthreadtypes.h to a similar path for all architectures (sysdeps/unix/sysv/<arch>/bits). No functional or build change is expected. The idea is mainly to organize the header placement for all architectures. Checked with a build for all major ABI (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabi, i386-linux-gnu, ia64-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu [1], mips{64}-linux-gnu, nios2-linux-gnu, powerpc{64le}-linux-gnu, s390{x}-linux-gnu, sparc{64}-linux-gnu, tile{pro,gx}-linux-gnu, and x86_64-linux-gnu). * sysdeps/unix/sysv/linux/x86/Implies: New file. * sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h: Move to ... * sysdeps/alpha/nptl/bits/pthreadtypes.h: ... here. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Move to ... * sysdeps/powerpc/nptl/bits/pthreadtypes.h: ... here. * sysdeps/x86/bits/pthreadtypes.h: Move to ... * sysdeps/x86/nptl/bits/pthreadtypes.h: ... here.
2017-04-10Add sysdeps/x86/dl-procinfo.cH.J. Lu
Add sysdeps/x86/dl-procinfo.c for x86 version of processor capability information to reduce duplication between i386 and x86_64 dl-procinfo.c. * sysdeps/i386/dl-procinfo.c: Include <sysdeps/x86/dl-procinfo.c>. * sysdeps/x86_64/dl-procinfo.c: Likewise. * sysdeps/x86/dl-procinfo.c: New file.
2017-04-10Remove unneeded declarations from math_private.hGabriel F. T. Gomes
The declarations of many functions in math_private.h are not required since __MATHDECL and __MATHDECLX, in math.h, already provide the declarations for these functions. This patch removes the declarations from math_private.h. It also adds the inclusion of math.h to the files which depended on the declaration of functions in math_private.h. Tested for powerpc64le and s390x. * sysdeps/generic/math_private.h: Remove declarations of many functions that are already declared in math.h. * sysdeps/ieee754/ldbl-128/e_logl.c: Include math.h to get the declaration for __frexpl. * sysdeps/ieee754/ldbl-128ibm/e_logl.c: Include math.h to get the declarations for __scalbnl and fabsl.
2017-04-09Check for __mprotect failure in _dl_map_segments [BZ #20831]Dmitry V. Levin
* elf/dl-map-segments.h (_dl_map_segments): Check for failure of __mprotect to change protection on the excess portion to disallow all access.
2017-04-07Check if SSE is available with HAS_CPU_FEATUREH.J. Lu
Similar to other CPU feature checks, check if SSE is available with HAS_CPU_FEATURE. * sysdeps/i386/fpu/fclrexcpt.c (__feclearexcept): Use HAS_CPU_FEATURE to check for SSE. * sysdeps/i386/fpu/fedisblxcpt.c (fedisableexcept): Likewise. * sysdeps/i386/fpu/feenablxcpt.c (feenableexcept): Likewise. * sysdeps/i386/fpu/fegetenv.c (__fegetenv): Likewise. * sysdeps/i386/fpu/fegetmode.c (fegetmode): Likewise. * sysdeps/i386/fpu/feholdexcpt.c (__feholdexcept): Likewise. * sysdeps/i386/fpu/fesetenv.c (__fesetenv): Likewise. * sysdeps/i386/fpu/fesetmode.c (fesetmode): Likewise. * sysdeps/i386/fpu/fesetround.c (__fesetround): Likewise. * sysdeps/i386/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/i386/fpu/fgetexcptflg.c (__fegetexceptflag): Likewise. * sysdeps/i386/fpu/fsetexcptflg.c (__fesetexceptflag): Likewise. * sysdeps/i386/fpu/ftestexcept.c (fetestexcept): Likewise. * sysdeps/i386/setfpucw.c (__setfpucw): Likewise. * sysdeps/x86/cpu-features.h (bit_cpu_SSE): New. (index_cpu_SSE): Likewise. (reg_SSE): Likewise.
2017-04-07getopt: merge from gnulib: use angle-bracket includes consistentlyPaul Eggert
* posix/getopt1.c: Include <config.h>, not "config.h".
2017-04-07getopt: annotate files with relationship to gnulib.Zack Weinberg
As the final act in this patchset, adjust the "This file is part of the GNU C Library" message at the top of each file to indicate which files are synced with gnulib. * posix/bits/getopt_core.h, posix/bits/getopt_ext.h * posix/getopt.c, posix/getopt1.c, posix/getopt_int.h: Mention in top-of-file boilerplate that these files are shared with gnulib. * posix/getopt.h, posix/bits/getopt_posix.h: Mention in top-of-file boilerplate that these files are NOT shared with gnulib, unlike the rest of the getopt implementation.
2017-04-07getopt: eliminate __need_getopt by splitting up getopt.h.Zack Weinberg
__need_getopt is misnamed; what it really means is "we want only the getopt features specified in POSIX, not the GNU extensions". Because this code is shared with gnulib, it winds up being cleanest to split getopt.h into *four* headers. getopt_core.h and getopt_ext.h will be shared with gnulib, getopt_posix.h will be just for glibc, and each project will have its own copy of getopt.h. * posix/bits/getopt_core.h, posix/bits/getopt_ext.h: New files, intended to be shared with gnulib. * posix/bits/getopt_posix.h: New file, not intended to be shared with gnulib. * posix/getopt.h: Now just includes features.h, bits/getopt_core.h, and bits/getopt_ext.h. Will no longer be shared with gnulib. * include/bits/getopt_core.h, include/bits/getopt_ext.h * include/bits/getopt_posix.h: New wrappers. * posix/Makefile: Install new headers. * posix/unistd.h, libio/stdio.h: Include bits/getopt_posix.h instead of getopt.h.
2017-04-07getopt: merge _GL_UNUSED annotations from gnulibZack Weinberg
gnulib now has annotations on at least some functions to cater to compilation with -Wunused-parameter. In order to follow suit cleanly, I've added to libc-symbols.h some of the _GL_* macros that gnulib-common.m4 puts into config.h. (I don't think they belong in sys/cdefs.h, at least not without further thought.) At this point all gnulib-side changes to getopt.c have been merged. * include/libc-symbols.h: For gnulib compatibility, define _GL_UNUSED, _GL_UNUSED_LABEL, _GL_ATTRIBUTE_PURE, and _GL_ATTRIBUTE_CONST. * posix/getopt.c (_getopt_initialize): Mark argc and argv parameters with _GL_UNUSED.
2017-04-07getopt: merge from gnulib: alloca avoidanceZack Weinberg
In one place, glibc's getopt uses alloca to construct a linked list of possibilities for an "ambiguous" long option. In gnulib, malloc should be used instead. Providing for both cases complicates things a fair bit. Instead of merging straight across, therefore, I have chosen to rewrite it using a boolean vector instead of a linked list. There is then only one allocation that might need freeing; in glibc it can honor __libc_use_alloca as usual, and in gnulib we define __libc_use_alloca to always be false, so we don't need ifdefs in the middle of the function. This should also be slightly more efficient in the normal case of long options being fully spelled out -- I think most people aren't even aware they _can_ sometimes abbreviate long options. One interesting consequence is that the list of possibilities is now printed in exactly the order they appear in the list of long options, instead of the first possibility being shuffled to the end. This shouldn't be a big deal but it did break one test that relied on the exact text of this error message. (The reason the previous patch was "in aid of" merging from gnulib is I didn't want to have to make this change in two places.) (The patch looks bigger than it really is because there's a fair bit of reindentation and code rearrangement.) * posix/getopt.c: When used standalone, define __libc_use_alloca as always false and alloca to abort if called. (process_long_option): Rewrite handling of ambiguous long options to use a single boolean vector, not a linked list; use __libc_use_alloca to decide whether to allocate this using alloca. * posix/tst-getopt_long1.c: Adjust text of expected error message.
2017-04-07getopt: refactor long-option handlingZack Weinberg
There were two copies of the bulk of the code to handle long options. Now there is only one. (Yes, this is in aid of merging from gnulib.) The change to bug-getopt4.c clarifies the error messages when the test fails. * posix/getopt.c (process_long_option): New function split out from _getopt_internal_r. (_getopt_internal_r): Replace both copies of the long-option processing code with calls to process_long_option. * posix/bug-getopt4.c (one_test): Print argv[0] in error messages. (do_test): Differentiate argv[0] in the two subtests.
2017-04-07getopt: tidy up _getopt_initialize a bitZack Weinberg
_getopt_data.__posixly_correct is completely redundant to _getopt_data.__ordering, and some work that logically belongs in _getopt_initialize was being done by _getopt_internal_r, making the code harder to understand. As a side effect, getenv will no longer be called if the first character of the options string is '+' or '-', which is probably a Good Thing. (Perhaps we should have a flag character that specifically asks for the permutation behavior?) * posix/getopt_int.h (_getopt_data): Remove __posixly_correct field. * posix/getopt.c (_getopt_internal_r): Move some initialization code... (_getopt_initialize): ...here. Don't set d->__posixly_correct.
2017-04-07getopt: merge from gnulib: function prototype adjustmentsZack Weinberg
For standards compliance, getopt, getopt_long, and getopt_long_only in glibc have to take 'char *const *argv' even though they can mutate the array. gnulib has tried to clean this up as much as possible: all the internal functions use 'char **argv', and when used standalone, so do getopt_long and getopt_long_only. Also brought over are __nonnull annotations, corrections to documentation, and apparently it is no longer necessary to worry about conflicting prototypes for getopt. The macroification of the definitions of getopt and __posix_getopt goes beyond what is currently in gnulib. At this point getopt1.c and getopt_int.h are identical to their gnulib versions. * posix/getopt.h: Add backup definition of __nonnull for consistency with gnulib. Define __getopt_argv_const to const if not already defined. (getopt): Update doc comment from gnulib. Prototype unconditionally. Add __nonnull annotation. (__posix_getopt): Add __nonnull annotation. (getopt_long, getopt_long_only): Use __getopt_argv_const in prototypes for consistency with gnulib. Add __nonnull annotations. * posix/getopt.c (_getopt_initialize, _getopt_internal_r) (getopt_internal): Change 'argv' argument to type 'char **'. Remove now-unnecessary casts. (getopt, __posix_getopt): Eliminate repetition with a macro. Cast 'argv' to 'char **' when calling _getopt_internal. * posix/getopt1.c (getopt_long, getopt_long_only): Use __getopt_argv_const for consistency with gnulib. Cast 'argv' to 'char **' when calling _getopt_internal. (_getopt_long_r, _getopt_long_only_r): Change 'argv' argument to type 'char **'. (main): Constify 'long_options'. * posix/getopt_int.h (getopt_internal, _getopt_internal_r) (_getopt_long_r, _getopt_long_only_r): Change 'argv' argument to type 'char **'.
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