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* malloc: Fix MALLOC_DEBUG -Wundef warningWill Newton2014-04-112-1/+11
| | | | | | | | | | | | | | | MALLOC_DEBUG is set optionally on the command line. Default the value to zero if it is not set on the command line, and test its value with #if rather than #ifdef. Verified the code is identical before and after this change apart from line numbers. ChangeLog: 2014-04-11 Will Newton <will.newton@linaro.org> * malloc/malloc.c [!MALLOC_DEBUG]: #define MALLOC_DEBUG to zero if it is not defined elsewhere. (mtrim): Test the value of MALLOC_DEBUG with #if rather than #ifdef.
* benchtests: Add pthread_once common-case test.Torvald Riegel2014-04-105-1/+44
| | | | | | | | | We have a single thread that runs a no-op initialization once and then repeatedly runs checks of the initialization (i.e., an acquire load and conditional jump) in a tight loop. This gives us, on average, the best-case latency of pthread_once (the initialization is the exactly-once slow path, and we're not looking at initialization-related synchronization overheads in this case).
* Save/restore bound registers in _dl_runtime_resolveIgor Zamyatin2014-04-095-20/+145
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch saves and restores bound registers in symbol lookup for x86-64: 1. Branches without BND prefix clear bound registers. 2. x86-64 pass bounds in bound registers as specified in MPX psABI extension on hjl/mpx/master branch at https://github.com/hjl-tools/x86-64-psABI https://groups.google.com/forum/#!topic/x86-64-abi/KFsB0XTgWYc Binutils has been updated to create an alternate PLT to add BND prefix when branching to ld.so. * config.h.in (HAVE_MPX_SUPPORT): New #undef. * sysdeps/x86_64/configure.ac: Set HAVE_MPX_SUPPORT. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/dl-trampoline.S (REGISTER_SAVE_AREA): New macro. (REGISTER_SAVE_RAX): Likewise. (REGISTER_SAVE_RCX): Likewise. (REGISTER_SAVE_RDX): Likewise. (REGISTER_SAVE_RSI): Likewise. (REGISTER_SAVE_RDI): Likewise. (REGISTER_SAVE_R8): Likewise. (REGISTER_SAVE_R9): Likewise. (REGISTER_SAVE_BND0): Likewise. (REGISTER_SAVE_BND1): Likewise. (REGISTER_SAVE_BND2): Likewise. (_dl_runtime_resolve): Use them. Save and restore Intel MPX bound registers when calling _dl_fixup.
* Define _STRING_ARCH_unaligned unconditionallyAdhemerval Zanella2014-04-0910-16/+31
| | | | | | | This patch defines _STRING_ARCH_unaligned to 0 on default bits/string.h header to avoid undefined compiler warnings on platforms that do not define it. It also make adjustments in code where tests checked if macro existed or not.
* Use statvfs64() for pathconf(_PC_NAME_MAX).Peter TB Brett2014-04-093-17/+15
| | | | | | | | | pathconf(_PC_NAME_MAX) was implemented on top of statfs(). The 32bit version therefore fails EOVERFLOW if the filesystem blockcount is sufficiently large. Most pathconf() queries use statvfs64(), which avoids this issue. This patch modifies pathconf(_PC_NAME_MAX) to do likewise.
* Move __PTHREAD_SPINS definition to architecture specific headerAdhemerval Zanella2014-04-0917-13/+79
| | | | | | | This patch moves the __PTHREAD_SPINS definition to arch specific header since pthread_mutex_t layout is also arch specific. This leads to no need to defining __PTHREAD_MUTEX_HAVE_ELISION and thus removing of the undefined compiler warning.
* PowerPC: Fix --disable-multi-arch buildsAdhemerval Zanella2014-04-0911-6/+31
| | | | | | | | | | This patch fixes some powerpc32 and powerpc64 builds with --disable-multi-arch option along with different --with-cpu=powerN. It cleanups the Implies directories by removing the multiarch folder for non multiarch config and also fixing two assembly implementations: powerpc64/power7/strncat.S that is calling the wrong strlen; and power8/fpu/s_isnan.S that misses the hidden_def and weak_alias directives.
* manual/ipc.texi: Fix AC-safety notes.Carlos O'Donell2014-04-082-2/+6
| | | | | The function sem_close is AC-unsafe because lll_lock* leaks a lock (aculock) and not because of twalk.
* string: Cosmetic cleanup of string functionsWill Newton2014-04-0711-47/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up string functions that do not have a version in gnulib on the assumption that glibc is the canonical upstream copy of this code. basename has a copy in gnulib but it is largely written to handle Windows paths so merging it is not really viable. The changes mostly consist of switching to ANSI function prototypes and removing unused includes. As many of these functions do not get built in a typical build due to architecture optimized versions being used instead I built these by hand to verify there were no build warnings and the code was identical. 2014-04-07 Will Newton <will.newton@linaro.org> * string/basename.c [HAVE_CONFIG_H]: Remove #ifdef and and contents. [!_LIBC] Remove #ifndef and contents. (basename): Use ANSI prototype. [_LIBC] Remove #idef. * string/memccpy.c (__memccpy): Use ANSI prototype. * string/memfrob.c (memfrob): Likewise. * string/strcoll.c (STRCOLL): Likewise. * string/strlen.c (strlen): Likewise. * string/strtok.c (STRTOK): Likewise. * string/strcat.c: Remove unused #include of memcopy.h. (strcat): Use ANSI prototype. * string/strchr.c: Remove unused #include of memcopy.h. (strchr): Use ANSI prototype. * string/strcmp.c: Remove unused #include of memcopy.h. (strcmp): Use ANSI prototype. * string/strcpy.c: Remove unused #include of memcopy.h. (strcpy): Use ANSI prototype.
* PowerPC: define _CALL_ELF if compiler does notAdhemerval Zanella2014-04-067-5/+65
| | | | | | | | | | | | This patch makes the configure adds -D_CALL_ELF=1 when compiler does not define _CALL_ELF (versions before powerpc64le support). It cleans up compiler warnings on old compiler where _CALL_ELF is not defined on powerpc64(be) builds. It does by add a new config.make variable for configure-deduced CPPFLAGS and accumulate into that (confix-extra-cppflags). It also generalizes libc_extra_cflags so it accumulates in sysdeps configure fragmenets.
* PowerPC: Fix nearbyint/nearbyintf result for FE_DOWNWARDAdhemerval Zanella2014-04-065-11/+213
| | | | | | | | | This patch fixes the powerpc32 optimized nearbyint/nearbyintf bogus results for FE_DOWNWARD rounding mode. This is due wrong instructions sequence used in the rounding calculation (two subtractions instead of adition and a subtraction). Fixes BZ#16815.
* tile: Fix cut-and-paste bug in commit fcccd5128.Chris Metcalf2014-04-042-2/+7
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* manual: clarify buffer behavior in getline [BZ #5666]David Svoboda2014-04-032-1/+8
| | | | | | | | | | | If the user has requested automatic buffer creation, getline may create it and not free things when an error occurs. That means the user is always responsible for calling free() regardless of the return value. The current documentation does not explicitly cover this which leaves it slightly ambiguous to the reader. So clarify things. URL: https://sourceware.org/bugzilla/show_bug.cgi?id=5666
* Factor mmap/munmap of PT_LOAD segments out of _dl_map_object_from_fd et al.Roland McGrath2014-04-0315-214/+391
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* elf/dl-lookup.c: Remove obsolete comment about nested functionWill Newton2014-04-032-5/+10
| | | | | | | | | | | | The nested function referred to has gone away so remove the comment. Also move the variable declaration down to where other variables of a similar lifetime are declared for clarity. 2014-04-03 Will Newton <will.newton@linaro.org> * elf/dl-lookup.c (do_lookup_x): Remove comment referring to nested function and move variable declarations down to before first use.
* Fix catan, catanh, __ieee754_logf in round-downward mode (bug 16799, bug 16800).Joseph Myers2014-04-0212-14/+242
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes incorrect results from catan and catanh of certain special inputs in round-downward mode (bug 16799), and incorrect results of __ieee754_logf (+/-0) in round-downward mode (bug 16800) that show up through catan/catanh when tested in all rounding modes, but not directly in the testing for logf because the bug gets hidden by the wrappers. Both bugs involve a zero that should be +0 being -0 instead: one computed as (1-x)*(1+x) in the catan/catanh case, and one as (x-x) in the logf case. The fixes ensure positive zero is used. Testing of catan and catanh in all rounding modes is duly enabled. I expect there are various other bugs in special cases in __ieee754_* functions that are normally hidden by the wrappers but would show up for testing with -lieee (or in future with -fno-math-errno if we replace -lieee and _LIB_VERSION with compile-time redirection to new *_noerrno symbol names). Tested x86_64 and x86 and ulps updated accordingly. [BZ #16799] [BZ #16800] * math/s_catan.c (__catan): Avoid passing -0 denominator to atan2 with 0 numerator. * math/s_catanf.c (__catanf): Likewise. * math/s_catanh.c (__catanh): Likewise. * math/s_catanhf.c (__catanhf): Likewise. * math/s_catanhl.c (__catanhl): Likewise. * math/s_catanl.c (__catanl): Likewise. * sysdeps/ieee754/flt-32/e_logf.c (__ieee754_logf): Always divide by positive zero when computing -Inf result. * math/libm-test.inc (catan_test): Use ALL_RM_TEST. (catanh_test): Likewise. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix clog / clog10 sign of zero result in round-downward mode (bug 16789).Joseph Myers2014-04-0211-36/+233
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16789, incorrect sign of (real part) zero result from clog and clog10 in round-downward mode, arising from that real part being computed as 0 - 0. To ensure that an underflow exception occurred, the code used an underflowing value (the next term in the series for log1p) in arithmetic computing the real part of the result, yielding the problematic 0 - 0 computation in some cases even when the mathematical result would be small but positive. The patch changes this code to use the math_force_eval approach to ensuring that an underflowing computation actually occurs. Tests of clog and clog10 are enabled in all rounding modes. Tested x86_64 and x86 and ulps updated accordingly. [BZ #16789] * math/s_clog.c (__clog): Use math_force_eval to ensure underflow instead of using underflowing value in computing result. * math/s_clog10.c (__clog10): Likewise. * math/s_clog10f.c (__clog10f): Likewise. * math/s_clog10l.c (__clog10l): Likewise. * math/s_clogf.c (__clogf): Likewise. * math/s_clogl.c (__clogl): Likewise. * math/libm-test.inc (clog_test): Use ALL_RM_TEST. (clog10_test): Likewise. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Correct IBM long double nextafterl.Alan Modra2014-04-024-17/+52
| | | | | | | | | | | | Fix for values near a power of two, and some tidies. [BZ #16739] * sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c (__nextafterl): Correct output when value is near a power of two. Use int64_t for lx and remove casts. Use decimal rather than hex exponent constants. Don't use long double multiplication when double will suffice. * math/libm-test.inc (nextafter_test_data): Add tests. * NEWS: Add 16739 and 16786 to bug list.
* Correct prefetch hint in power7 memrchr.Alan Modra2014-04-022-1/+5
| | | | | | Typo fix. * sysdeps/powerpc/powerpc64/power7/memrchr.S: Correct stream hint.
* Fix reference to toc symbol.Alan Modra2014-04-022-1/+5
| | | | | | | https://sourceware.org/ml/binutils/2014-03/msg00033.html removes the "magic" treatment of symbols defined in a .toc section. * sysdeps/powerpc/powerpc64/start.S: Add @toc to toc symbol reference.
* Update NEWS for fixed bug 13347Florian Weimer2014-04-011-5/+5
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* benchtests: Build ffs and ffsl benchtests with -fno-builtinWill Newton2014-04-012-0/+8
| | | | | | | | | | | | Without this flag it is possible that the compiler will optimize away the calls to ffs/ffsll. ChangeLog: 2014-04-01 Will Newton <will.newton@linaro.org> * benchtests/Makefile (CFLAGS-bench-ffs.c): Add -fno-builtin. (CFLAGS-bench-ffsll.c): Likewise.
* Check for syscall error in the SETXID implementation in NPTL (bug 13347).Florian Weimer2014-04-014-3/+161
| | | | | | | | At this point, we can only abort the process because we have already switched credentials on other threads. Returning an error would still leave the process in an inconsistent state. The new xtest needs root privileges to run.
* Fix s_copysign stack temp for PowerPC64 ELFv2Alan Modra2014-04-012-2/+7
| | | | | [BZ #16786] * sysdeps/powerpc/powerpc64/fpu/s_copysign.S: Don't trash stack.
* Set errno for scalb errors (bug 6803, bug 6804).Joseph Myers2014-03-317-80/+175
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the default mode of scalb to set errno (bugs 6803 and 6804). Previously, the _LIB_VERSION == _SVID_ mode would set errno but only in some relevant cases, and with various peculiarities (such as errno setting when an exact infinity or zero result arises with an argument to scalb being an infinity). This patch leaves this mode bug-compatible, while making the default mode set errno in accordance with normal practice (so an exact infinity from an infinite argument is not an error, and nor is an exact zero result). gen-libm-test.pl is taught new notation such as ERRNO_PLUS_OFLOW to facilitate writing the tests of errno setting for underflow / overflow in libm-test.inc. Note that bug 6803 also covers scalbn and scalbln, but this patch only addresses the scalb parts of that bug (along with the whole of bug 6804). Tested x86_64 and x86. [BZ #6803] [BZ #6804] * math/w_scalb.c (__scalb): For non-SVID mode, check result and set errno as appropriate. * math/w_scalbf.c (__scalbf): Likewise. * math/w_scalbl.c (__scalbl): Likewise. * math/gen-libm-test.pl (parse_args): Handle ERRNO_PLUS_OFLOW, ERRNO_MINUS_OFLOW, ERRNO_PLUS_UFLOW and ERRNO_MINUS_UFLOW. * math/libm-test.inc (scalb_test_data): Add errno expectations. Add more NaN tests.
* Set errno for atan2 underflow (bug 16349).Joseph Myers2014-03-317-551/+581
| | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16349, missing errno setting for atan2 underflow, by adding appropriate checks to the existing wrappers. (As in other cases, the __kernel_standard support for calling matherr is considered to be for existing code expecting existing rules for what's considered an error, even if those don't correspond to a general logical scheme for what counts as what kind of error, so __set_errno calls are added directly without any changes to __kernel_standard.) Tested x86_64 and x86. [BZ #16349] * math/w_atan2.c: Include <errno.h>. (__atan2): Set errno for result underflowing to zero. * math/w_atan2f.c: Include <errno.h>. (__atan2f): Set errno for result underflowing to zero. * math/w_atan2l.c: Include <errno.h>. (__atan2l): Set errno for result underflowing to zero. * math/auto-libm-test-in: Don't allow missing errno for some atan2 tests. * math/auto-libm-test-out: Regenerated.
* PowerPC: Fix little endian enconding for mfvsrdAdhemerval Zanella2014-03-316-0/+38
| | | | | This patch fixes the MFVSRD_R3_V1 macro that encodes 'mfvsrd r3,vs1' (to support old binutils) for little endian.
* Correct robust mutex / PI futex kernel assumptions (bug 9894).Joseph Myers2014-03-316-6/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch continues fixing __ASSUME_* issues in preparation for moving to a 2.6.32 minimum kernel version by addressing assumptions on robust mutex and PI futex support availability. Those assumptions are bug 9894, but to be clear this patch does not address all the issues from that bug about wrong version assumptions, only those still applicable for --enable-kernel=2.6.32 or later (with the expectation that the move to that minimum kernel will obsolete the other parts of the bug). The patch is independent of <https://sourceware.org/ml/libc-alpha/2014-03/msg00585.html>, my other pending-review patch preparing for the kernel version change; the two together complete all the changes I believe are needed in preparation regarding any macro in sysdeps/unix/sysv/linux/kernel-features.h that would be affected by such a change. (I have not checked the correctness of macros whose conditions are unaffected by such a change, or macros only defined in other kernel-features.h files.) As discussed in that bug, robust mutexes and PI futexes need futex_atomic_cmpxchg_inatomic to be implemented, in addition to certain syscalls needed for robust mutexes (and architecture-independent kernel pieces for all the features in question). That is, as I understand it, they need futex_atomic_cmpxchg_inatomic to *work* (not return an ENOSYS error). The issues identified in my analysis relate to ARM, M68K, MicroBlaze, MIPS and SPARC. On ARM, whether futex_atomic_cmpxchg_inatomic works depends on the kernel configuration. As of 3.13, the condition for *not* working is CONFIG_CPU_USE_DOMAINS && CONFIG_SMP. As of 2.6.32 it was simply CONFIG_SMP that meant the feature was not implemented. I don't know if there are any circumstances in which we can say "we can assume a userspace glibc binary built with these options will never run on a kernel with the problematic configuration", but at least for now I'm just undefining the relevant __ASSUME_* macros for ARM. On M68K, two of the three macros are undefined for kernels before 3.10, but as far as I can see __ASSUME_FUTEX_LOCK_PI is in the same group needing futex_atomic_cmpxchg_inatomic support and so should be undefined as well. On MicroBlaze the required support was added in 2.6.33. On MIPS, the support depends on cpu_has_llsc in the kernel - that is, actual hardware LL/SC support (GCC and glibc for MIPS GNU/Linux rely on the instructions being supported in some way, but it may be kernel emulation; futex_atomic_cmpxchg_inatomic doesn't work with that emulation). The same condition as in GCC for indicating LL/SC support may not be available is used for undefining the macros in glibc, __mips == 1 || defined _MIPS_ARCH_R5900. (Maybe we could in fact desupport MIPS processors without the hardware support in glibc.) On SPARC, 32-bit kernels don't support futex_atomic_cmpxchg_inatomic; __arch64__ || __sparc_v9__ is used as the condition for binaries that won't run on 32-bit kernels. This patch is not tested beyond the sanity check of an x86_64 build. [BZ #9894] * sysdeps/unix/sysv/linux/kernel-features.h [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_SET_ROBUST_LIST): Do not define. [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_FUTEX_LOCK_PI): Likewise. [__sparc__ && !__arch64__ && !__sparc_v9__] (__ASSUME_REQUEUE_PI): Likewise. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_FUTEX_LOCK_PI): Undefine. (__ASSUME_REQUEUE_PI): Likewise. (__ASSUME_SET_ROBUST_LIST): Likewise. * sysdeps/unix/sysv/linux/m68k/kernel-features.h [__LINUX_KERNEL_VERSION < 0x030a00] (__ASSUME_FUTEX_LOCK_PI): Undefine. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_FUTEX_LOCK_PI): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_REQUEUE_PI): Likewise. [__LINUX_KERNEL_VERSION < 0x020621] (__ASSUME_SET_ROBUST_LIST): Likewise. * sysdeps/unix/sysv/linux/mips/kernel-features.h [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_FUTEX_LOCK_PI): Undefine. [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_REQUEUE_PI): Likewise. [__mips == 1 || _MIPS_ARCH_R5900] (__ASSUME_SET_ROBUST_LIST): Likewise.
* Fix futimesat for older MicroBlaze kernels (bug 16648).Joseph Myers2014-03-314-3/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Continuing the fixes for __ASSUME_* issues in preparation for moving to a 2.6.32 minimum kernel version, this *untested* patch fixes bug 16648, the definition of __ASSUME_ATFCTS meaning that the futimesat syscall is assumed for all MicroBlaze kernels despite not being present until 2.6.33. __ASSUME_ATFCTS controls conditionals relating to a lot of different syscalls in Linux-specific code (fstatat64 faccessat fchmodat fchownat futimesat newfstatat linkat mkdirat openat readlinkat renameat symlinkat unlinkat mknodat), where whether newfstatat fstatat64 futimesat are used depends on the architecture, as well as controlling whether openat64_not_cancel_3 is expected to work in sysdeps/posix/getcwd.c. The assumptions are all OK as of 2.6.32 except for this MicroBlaze case, and it's generally desirable to get rid of as many of the __ASSUME_ATFCTS conditionals as possible, to simplify the code (the fallbacks include potential unbounded dynamic stack allocations). Thus, rather than the simplest approach of undefining __ASSUME_ATFCTS for older kernels on MicroBlaze, this patch takes the approach of using the linux-generic implementation of futimesat for MicroBlaze kernels before 2.6.33 (all such kernels have the utimensat syscall). [BZ #16648] * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION >= 0x020621] (__ASSUME_FUTIMESAT): Define. * sysdeps/unix/sysv/linux/microblaze/futimesat.c: New file.
* benchtests: Add benchtests for ffs and ffsllWill Newton2014-03-314-3/+215
| | | | | | | | | | | | Add benchtests for ffs and ffsll. There is no benchtest for ffsl as it is identical to one of the other functions. 2014-03-31 Will Newton <will.newton@linaro.org> * benchtests/Makefile (bench): Add ffs and ffsll to list of tests. * benchtests/ffs-inputs: New file. * benchtests/ffsll-inputs: Likewise.
* Fix ChangeLog formatting.Carlos O'Donell2014-03-301-3/+3
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* Fix scalb spurious "invalid" exceptions (bug 16770).Joseph Myers2014-03-296-4/+30
| | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16770, spurious "invalid" exceptions from scalb when testing whether the second argument is an integer, by inserting appropriate range checks to determine whether a cast to int is safe. (Note that invalid_fn is a function that handles both nonintegers and large integers, distinguishing them reliably using functions such as __rint; note also that there are no issues with scalb needing to avoid spurious "inexact" exceptions - it's an old-POSIX XSI function, not a standard C function bound to an IEEE 754 operation - although the return value is still fully determined.) Tested x86_64 and x86. [BZ #16770] * math/e_scalb.c (__ieee754_scalb): Check second argument is not too large before casting to int. * math/e_scalbf.c (__ieee754_scalbf): Likewise. * math/e_scalbl.c (__ieee754_scalbl): Likewise. * math/libm-test.inc (scalb_test_data): Add more tests.
* Detailed benchmark outputs for functionsSiddhesh Poyarekar2014-03-294-2/+44
| | | | | | | | This patch adds an option to get detailed benchmark output for functions. Invoking the benchmark with 'make DETAILED=1 bench' causes each benchmark program to store a mean execution time for each input it works on. This is useful to give a more comprehensive picture of performance of functions compared to just the single mean figure.
* Make bench.out in json formatSiddhesh Poyarekar2014-03-296-18/+78
| | | | | | | | | | | | | | This patch changes the output format of the main benchmark output file (bench.out) to an extensible format. I chose JSON over XML because in addition to being extensible, it is also not too verbose. Additionally it has good support in python. The significant change I have made in terms of functionality is to put timing information as an attribute in JSON instead of a string and to do that, there is a separate program that prints out a JSON snippet mentioning the type of timing (hp_timing or clock_gettime). The mean timing has now changed from iterations per unit to actual timing per iteration.
* [benchtests] Use inputs file for modfSiddhesh Poyarekar2014-03-293-44/+9
| | | | | The modf benchmark can now use the framework since the introduction of output arguments.
* Fix clog10 (-0 +/- 0i) (bug 16362).Joseph Myers2014-03-286-10/+34
| | | | | | | | | | | | | | | | | | | | | | This patch fixes the imaginary part of clog10 (-0 +/- 0i), which should be +/-pi / log(10) by analogy with clog (the functions were wrongly returning a result with imaginary part +/-pi, same as for clog, and the tests matched the incorrect result, though both functions and tests were correct for the similar case of clog10 (-inf +/- 0i)). Tested x86_64 and x86. [BZ #16362] * math/s_clog10.c (M_PI_LOG10E): New macro. (__clog10): Use M_PI_LOG10E instead of M_PI when real and imaginary parts are 0. * math/s_clog10f.c (M_PI_LOG10Ef): New macro. (__clog10f): Use M_PI_LOG10Ef instead of M_PI when real and imaginary parts are 0. * math/s_clog10l.c (M_PI_LOG10El): New macro. (__clog10l): Use M_PI_LOG10El instead of M_PIl when real and imaginary parts are 0. * math/libm-test.inc (clog10_test_data): Update expected results for when real and imaginary parts are 0.
* 2014-03-27 Paul Pluzhnikov <ppluzhnikov@google.com>Paul Pluzhnikov2014-03-272-10/+13
| | | | | * elf/dl-load.c: Finish conversion of __builtin_expect into __glibc_{un}likely.
* Fix x86/x86_64 expl/exp10l spurious underflows (bug 16348).Joseph Myers2014-03-276-9/+715
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16348, spurious underflows from x86/x86_64 expl on arguments close to 0. These implementations effectively use expm1 (on the fractional part of the argument) internally, so resulting in spurious underflows when the result is very close to 1. For arguments small enough that the round-to-nearest correct result is 1, this patch uses 1+x instead. These implementations are also used for exp10l and so the patch fixes similar issues there (the 0x1p-67 threshold being small enough to be correct for exp10l as well as expl). But because of spurious underflows in other exp10 implementations (bug 16560), the tests aren't added for exp10 at this point - they can be added when the other exp10 parts of that bug are fixed. Tested x86_64 and x86; no ulps updates needed. [BZ #16348] * sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL) [!USE_AS_EXPM1L]: Use 1+x for argument with exponent below -67. * sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL) [!USE_AS_EXPM1L]: Likewise. * math/auto-libm-test-in: Add more tests of exp. * math/auto-libm-test-out: Regenerated.
* Return NULL for wildcard values in getnetgrent from nscd (BZ #16759)Siddhesh Poyarekar2014-03-273-4/+17
| | | | | | | | | | | | | | | | | | | | | | getnetgrent is supposed to return NULL for values that are wildcards in the (host, user, domain) triplet. This works correctly with nscd disabled, but with it enabled, it returns a blank ("") instead of a NULL. This is easily seen with the output of `getent netgroup foonet` for a netgroup foonet defined as follows in /etc/netgroup: foonet (,foo,) The output with nscd disabled is: foonet ( ,foo,) while with nscd enabled, it is: foonet (,foo,) The extra space with nscd disabled is due to the fact that `getent netgroup` adds it if the return value from getnetgrent is NULL for either host or user.
* Avoid overlapping addresses to stpcpy calls in nscd (BZ #16760)Siddhesh Poyarekar2014-03-273-7/+17
| | | | | | | | | | | | | | | | | | Calls to stpcpy from nscd netgroups code will have overlapping source and destination when all three values in the returned triplet are non-NULL and in the expected (host,user,domain) order. This is seen in valgrind as: ==3181== Source and destination overlap in stpcpy(0x19973b48, 0x19973b48) ==3181== at 0x4C2F30A: stpcpy (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==3181== by 0x12567A: addgetnetgrentX (string3.h:111) ==3181== by 0x12722D: addgetnetgrent (netgroupcache.c:665) ==3181== by 0x11114C: nscd_run_worker (connections.c:1338) ==3181== by 0x4E3C102: start_thread (pthread_create.c:309) ==3181== by 0x59B81AC: clone (clone.S:111) ==3181== Fix this by using memmove instead of stpcpy.
* Fix dwarf2 unwinding through futex functions.Andi Kleen2014-03-263-336/+53
| | | | | | | | | | | | | | | | | | | When profiling programs with lock problems with perf record -g dwarf, libunwind can currently not backtrace through the futex and unlock functions in pthread. This is because they use out of line sections, and those are not correctly described in dwarf2 (I believe needs dwarf3 or 4). This patch first removes the out of line sections. They only save a single jump, but cause a lot of pain. Then it converts the now inline lock code to use the now standard gas .cfi_* commands. With these changes libunwind/perf can backtrace through the futex functions now. Longer term it would be likely better to just use C futex() functions on x86 like all the other architectures. This would clean the code up even more.
* Fix nscd lookup for innetgr when netgroup has wildcards (BZ #16758)Siddhesh Poyarekar2014-03-273-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | nscd works correctly when the request in innetgr is a wildcard, i.e. when one or more of host, user or domain parameters is NULL. However, it does not work when the the triplet in the netgroup definition has a wildcard. This is easy to reproduce for a triplet defined as follows: foonet (,foo,) Here, an innetgr call that looks like this: innetgr ("foonet", "foohost", "foo", NULL); should succeed and so should: innetgr ("foonet", NULL, "foo", "foodomain"); It does succeed with nscd disabled, but not with nscd enabled. This fix adds this additional check for all three parts of the triplet so that it gives the correct result. [BZ #16758] * nscd/netgroupcache.c (addinnetgrX): Succeed if triplet has blank values.
* 2014-03-26 Paul Pluzhnikov <ppluzhnikov@google.com>Paul Pluzhnikov2014-03-262-40/+40
| | | | * elf/dl-load.c: Convert __builtin_expect into __glibc_{un}likely.
* Make x86_64 fegetenv preserve exception mask (bug 16198).Joseph Myers2014-03-265-5/+69
| | | | | | | | | | | | | Bug 16198 is x86_64 fegetenv wrongly masking exceptions for which traps are enabled, because that's a side-effect of the fnstenv instruction. This patch fixes it to use fldenv immediately after fnstenv, like the i386 version. Tested x86_64 and x86. [BZ #16198] * sysdeps/x86_64/fpu/fegetenv.c (fegetenv): Use fldenv after fnstenv. * math/test-fenv-preserve.c: New file. * math/Makefile (tests): Add test-fenv-preserve.
* benchtests/bench-strtod.c: Increase timeout valueWill Newton2014-03-262-0/+7
| | | | | | | | | | | This benchmark can take longer than the default 2 seconds on slower platforms, so increase it to 10 seconds. ChangeLog: 2014-03-26 Will Newton <will.newton@linaro.org> * benchtests/bench-strtod.c (TIMEOUT): Define to 10.
* Kludge fix for Versions.def regressionRoland McGrath2014-03-252-5/+38
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* Add empty GLIBC_2.2.5 version to elf/Versions.Joseph Myers2014-03-252-0/+8
| | | | | | | As needed for SHLIB_COMPAT calls using this version. * elf/Versions (libc) [EXPORT_UNWIND_FIND_FDE]: Add empty GLIBC_2.2.5 version.
* Fix localplt check for GNU_IFUNCAdhemerval Zanella2014-03-252-2/+13
| | | | | | | | GNU_IFUNC are shown by readelf in 'Relocation section' value as "symbol()" instead of expected hexadecimal value. This causes the check-localplt script to ignore potential PLT stub begin generated by wrong IFUNC usage. This patch changes the localplt script to emit such PLT cases.
* PowerPC: Revert __PTHREAD_MUTEX_HAVE_ELISION changeAdhemerval Zanella2014-03-252-3/+6
| | | | This patch revert 449282f2e0e850c29f6a9666058503d4734964f0.
* Update powerpc-fpu ULPs.Adhemerval Zanella2014-03-252-1/+879
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