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2014-06-19Use 3 bytes for __pad1 in pthread_rwlock_t for x32H.J. Lu
Since long is 4 bytes for x32, we should use 3 bytes for __pad1 when a long __pad1 is replaced by a byte __rwelision and __pad1. * sysdeps/x86/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Use 3 bytes for __pad1 for x32. (__PTHREAD_RWLOCK_ELISION_EXTRA): Likewise.
2014-06-19Add x86_64 memset optimized for AVX2Ling Ma
In this patch we take advantage of HSW memory bandwidth, manage to reduce miss branch prediction by avoiding using branch instructions and force destination to be aligned with avx & avx2 instruction. The CPU2006 403.gcc benchmark indicates this patch improves performance from 26% to 59%. * sysdeps/x86_64/multiarch/Makefile: Add memset-avx2. * sysdeps/x86_64/multiarch/memset-avx2.S: New file. * sysdeps/x86_64/multiarch/memset.S: Likewise. * sysdeps/x86_64/multiarch/memset_chk.S: Likewise. * sysdeps/x86_64/multiarch/rtld-memset.S: Likewise.
2014-06-19Fix memory leak in regexp compiler (BZ #17069)Andreas Schwab
2014-06-19malloc/malloc.c: Avoid calling sbrk unnecessarily with zeroWill Newton
Due to my bad review suggestion for the fix for BZ #15089 a check was removed from systrim to prevent sbrk being called with a zero argument. Add the check back to avoid this useless work. ChangeLog: 2014-06-19 Will Newton <will.newton@linaro.org> * malloc/malloc.c (systrim): If extra is zero then return early.
2014-06-19Remove unnecessary $(.)Siddhesh Poyarekar
The variable is not necessary, especially since it does not exist.
2014-06-19[AArch64] Add optimized strchr.Richard Earnshaw
Implementation of strchr for AArch64. Speedups taken from micro-bench show the improvements relative to the standard C code. The use of LD1 means we have identical code for both big- and little-endian systems.
2014-06-18Fix __ieee754_logl (-LDBL_MAX) in FE_DOWNWARD mode (bug 17022).Joseph Myers
This patch fixes __ieee754_logl (-LDBL_MAX) on x86_64 and x86 not to subtract 1 from its argument and so cause spurious overflow in FE_DOWNWARD mode. (For any argument strictly less than -1, it doesn't matter whether or not 1 is subtracted before computing log1p, as long as the result doesn't overflow to -Inf.) Tested x86_64 and x86. (This particular case lacks test coverage, since the testsuite doesn't cover -lieee, but it will be covered by tests after the following patch to test pow in all rounding modes, which was the context in which this bug was found.) [BZ #17022] * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Do not subtract 1 from arguments -2 or below. * sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise.
2014-06-18Don't read past end of pattern in fnmatch (BZ #17062)Andreas Schwab
2014-06-18Use $(rtld-prefix) more consistently.Joseph Myers
The glibc makefiles have a standard variable, $(rtld-prefix), to run the dynamic linker with a default --library-path option; this is used as the basis of lots of other variables for running programs compiled with the newly built library. A few places however use $(elf-objpfx)ld.so or $(elf-objpfx)${rtld-installed-name} directly, with such a --library-path option. This patch makes such places use $(rtld-prefix) instead. I'm not aware of any significance in these cases to the choice of ld.so or ${rtld-installed-name} when running the dynamic linker, or to whether $(patsubst %,:%,$(sysdep-library-path)) is included in the library-path as it is in $(rtld-prefix) and just one of the places being changed. Tested x86_64. * elf/Makefile ($(objpfx)tst-unused-dep.out): Use $(rtld-prefix). * iconvdata/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Likewise. * sysdeps/s390/s390-64/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Likewise. localedata/ChangeLog: * Makefile (LOCALEDEF): Use $(rtld-prefix).
2014-06-17PowerPC: Fix nearbyintl failure for few inputsRajalakshmi Srinivasaraghavan
This patch fixes few failures in nearbyintl() where the fraction part is close to 0.5.i The new tests added report few extra failures in nearbyint_downward and nearbyint_towardzero which is a known issue. Fixes #17031.
2014-06-17PowerPC: Move powerpc code out of nptl/ subdirectoryAdhemerval Zanella
2014-06-17Fix ChangeLog indentation.Adhemerval Zanella
2014-06-16Add CFI to x86 ceil / floor / trunc (bug 16681).Joseph Myers
This patch adds CFI to the sysdeps/i386/fpu/ implementations of ceil, floor and trunc functions, for consistency with other x86 .S files in glibc which have CFI for stack adjustments. Tested x86. [BZ #16681] * sysdeps/i386/fpu/s_ceil.S (__ceil): Add CFI. * sysdeps/i386/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/i386/fpu/s_ceill.S (__ceill): Likewise. * sysdeps/i386/fpu/s_floor.S (__floor): Likewise. * sysdeps/i386/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/i386/fpu/s_floorl.S (__floorl): Likewise. * sysdeps/i386/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/i386/fpu/s_truncf.S (__truncf): Likewise. * sysdeps/i386/fpu/s_truncl.S (__truncl): Likewise.
2014-06-17m68k: update libm test ULPsAndreas Schwab
2014-06-16Fix typo in preprocessor conditionalAndreas Schwab
2014-06-16Pass $TIMEOUTFACTOR to tests also in cross testingAndreas Schwab
2014-06-16Fix tautological comparison in non-executed part of tst-setuid2 (BZ #17058)Florian Weimer
This part never runs with the current implementation because the setresuid call currently aborts (as intended).
2014-06-16Update feature guard for strdup/strndup in <bits/string2.h>Andreas Schwab
2014-06-14Update Sparc ULPs.David S. Miller
* sysdeps/sparc/fpu/libm-test-ulps: Update.
2014-06-14m68k: Consolidate NPTL/non versions of cloneAndreas Schwab
2014-06-14m68k: Consolidate NPTL/non versions of vforkAndreas Schwab
2014-06-14Add fallback file for elide.hAndi Kleen
Add the missing fallback file for elide.h to fix non x86 builds. Sorry about that. This is just a noop macro file that makes all elision code to be optimized out.
2014-06-13Fix pthread.h in installed-headers list.Stefan Liebler
2014-06-13S390: Move NPTL public headers to sysdeps/s390/nptl/.Roland McGrath
2014-06-13Move S390 code out of nptl/sysdeps/s390/.Roland McGrath
2014-06-13S390: Convert fork.c to arch-fork.hRoland McGrath
2014-06-13Consolidate sparc clone, fork, and vfork implementations.David S. Miller
* nptl/sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Delete. * nptl/sysdeps/unix/sysv/linux/sparc/sparc32/pt-vfork.S: Delete. * nptl/sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Moved ... * sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: ... here. * nptl/sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Delete. * nptl/sysdeps/unix/sysv/linux/sparc/sparc64/pt-vfork.S: Delete. * nptl/sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Moved ... * sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: ... here. * sysdeps/unix/sysv/linux/sparc/fork.S: Delete. * sysdeps/unix/sysv/linux/sparc/pt-vfork.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__thread_start): Remove RESET_PID cpp guards. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__thread_start): Remove RESET_PID cpp guards. * sysdeps/unix/sysv/linux/sparc/vfork.S: Delete.
2014-06-13m68k: avoid pointer to integer conversion warningAndreas Schwab
2014-06-13ChangeLog fixAndreas Schwab
2014-06-13Remove x86 assembler rwlock codeAndi Kleen
With the recent tuning the C version of rwlocks is basically the same performance as the x86 assembler version for uncontended locks (with a a few cycles near the run-to-run variability). For others it should not matter anyways. So remove the assembler code and use the C version like other architectures.
2014-06-13Add adaptive elision to rwlocksAndi Kleen
This patch relies on the C version of the rwlocks posted earlier. With C rwlocks it is very straight forward to do adaptive elision using TSX. It is based on the infrastructure added earlier for mutexes, but uses its own elision macros. The macros are fairly general purpose and could be used for other elision purposes too. This version is much cleaner than the earlier assembler based version, and in particular implements adaptation which makes it safer. I changed the behavior slightly to not require any changes in the test suite and fully conform to all expected behaviors (generally at the cost of not eliding in various situations). In particular this means the timedlock variants are not elided. Nested trylock aborts.
2014-06-13Add a fast path for C rd/wrlock v2Andi Kleen
One difference of the C versions to the assembler wr/rdlock is that the C compiler saves some registers which are unnecessary for the fast path in the prologue of the functions. Split the uncontended fast path out into a separate function. Only when contention is detected is the full featured function called. This makes the fast path code (nearly) identical to the assembler version, and gives uncontended performance within a few cycles. v2: Rename some functions and add space.
2014-06-13get_nprocs: Only return explictly set cache values (BZ #16996)Meador Inge
The implementation of __get_nprocs uses a stactic variable to cache the value of the current number of processors. The caching breaks when 'time (NULL) == 0': $ cat nproc.c #include <stdio.h> #include <time.h> #include <sys/time.h> int main(int argc, char *argv[]) { time_t t; struct timeval tv = {0, 0}; printf("settimeofday({0, 0}, NULL) = %d\n", settimeofday(&tv, NULL)); t = time(NULL); printf("Time: %d, CPUs: %d\n", (unsigned int)t, get_nprocs()); return 0; } $ gcc -O3 nproc.c $ ./a.out settimeofday({0, 0}, NULL) = -1 Time: 1401311578, CPUs: 4 $ sudo ./a.out settimeofday({0, 0}, NULL) = 0 Time: 0, CPUs: 0 The problem is with the condition used to check whether a cached value should be returned or not: static int cached_result; static time_t timestamp; time_t now = time (NULL); time_t prev = timestamp; atomic_read_barrier (); if (now == prev) return cached_result; This patch fixes the problem by ensuring that 'cached_result' has been set at least once before returning it.
2014-06-12Move SPARC public headers out of nptl/Roland McGrath
2014-06-12Move SPARC code out of nptl/sysdeps/sparc/.Roland McGrath
2014-06-12SPARC: Define TLS_DEFINE_INIT_TPRoland McGrath
2014-06-12SPARC: Convert fork.c to arch-fork.hRoland McGrath
2014-06-12Use list.h in posix-timer code.Roland McGrath
2014-06-12Get rid of nptl/sysdeps/pthread/ subdirectoryRoland McGrath
2014-06-12Consolidate NPTL sigprocmask.Roland McGrath
2014-06-12Move i386 code out of nptl/ subdirectory.Roland McGrath
2014-06-12Move SH code out of nptl/ subdirectory.Roland McGrath
2014-06-12posix_spawn_faction_addopen: Add missing string.h include directiveStefan Liebler
This is needed to avoid a PLT call on s390.
2014-06-11Move x86_64 code out of nptl/ subdirectory.Roland McGrath
2014-06-11Update powerpc-fpu ULPs.Adhemerval Zanella
2014-06-11conformtest: clean up POSIX expectations for sys/mman.h, sys/stat.h, ↵Joseph Myers
sys/types.h. Continuing the series of patches to clean up conformtest expectations for "POSIX" (1995/6) based on review of the expectations against the standard, this patch cleans up expectations for sys/mman.h, sys/stat.h and sys/types.h. Tested x86_64; no new XFAILs needed. * conform/data/sys/mman.h-data [POSIX] (size_t): Do not require type. [POSIX] (off_t): Likewise. * conform/data/sys/stat.h-data (S_IRGRP): Require constant. [POSIX] (S_ISBLK): Require macro. [POSIX] (S_ISCHR): Likewise. [POSIX] (S_ISDIR): Likewise. [POSIX] (S_ISFIFO): Likewise. [POSIX] (S_ISREG): Likewise. [POSIX || XPG3 || XPG4 || UNIX98] (S_TYPEISTMO): Do not list optional-macro. * conform/data/sys/types.h-data [POSIX] (blkcnt_t): Do not require type. [POSIX] (time_t): Likewise. [POSIX] (timer_t): Likewise.
2014-06-11posix_spawn_file_actions_addopen needs to copy the path argument (BZ 17048)Florian Weimer
POSIX requires that we make a copy, so we allocate a new string and free it in posix_spawn_file_actions_destroy. Reported by David Reid, Alex Gaynor, and Glyph Lefkowitz. This bug may have security implications.
2014-06-11tile: Consolidate NPTL/non versions of vforkChris Metcalf
2014-06-11Tile: Define TLS_DEFINE_INIT_TPRoland McGrath
2014-06-11S390: Define TLS_DEFINE_INIT_TPRoland McGrath
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