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* Rebuilt fresh sparc ULPS to get rid of removed tests.David S. Miller2015-04-152-164/+78
| | | | * sysdeps/sparc/fpu/libm-test-ulps: Regenerate from scratch.
* Use correct signedness in wcsncmpStefan Liebler2015-04-138-78/+175
| | | | | | | | | | | | | | [BZ #18206] * wcsmbs/wcsncmp.c (wcsncmp): Compare as wchar_t, not wint_t. Use signed comparision instead of substraction to avoid overflow bug. * localedata/tests-mbwc/tst_wcsncmp.c (tst_wcsncmp): Take the sign of ret. * localedata/tests-mbwc/dat_wcsncmp.c (tst_wcsncmp_loc): Do not expect precise return values. Only the sign matters. * wcsmbs/Makefile (strop-tests): Add wcsncmp. * wcsmbs/test-wcsncmp.c: New File. * string/test-strncmp.c: Add wcsncmp support.
* Set errno for log1p on pole/domain error.Stefan Liebler2015-04-1325-24/+261
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to bug 6792, errno is not set to ERANGE/EDOM by calling log1p/log1pf/log1pl with x = -1 or x < -1. This patch adds a wrapper which sets errno in those cases and returns the value of the existing __log1p function. The log1p is now an alias to the wrapper function instead of __log1p. The files in sysdeps are reflecting these changes. The ia64 implementation sets errno by itself, thus the wrapper-file is empty. The libm-test is adjusted for log1p-tests to check errno. [BZ #6792] * math/w_log1p.c: New file. * math/w_log1pf.c: Likewise. * math/w_log1pl.c: Likewise. * math/Makefile (libm-calls): Add w_log1p. * math/s_log1pl.c (log1pl): Remove weak_alias. * sysdeps/i386/fpu/s_log1p.S (log1p): Likewise. * sysdeps/i386/fpu/s_log1pf.S (log1pf): Likewise. * sysdeps/i386/fpu/s_log1pl.S (log1pl): Likewise. * sysdeps/x86_64/fpu/s_log1pl.S (log1pl): Likewise. * sysdeps/ieee754/dbl-64/s_log1p.c (log1p): Likewise. [NO_LONG_DOUBLE] (log1pl): Likewise. * sysdeps/ieee754/flt-32/s_log1pf.c (log1pf): Likewise. * sysdeps/ieee754/ldbl-128/s_log1pl.c (log1pl): Likewise. * sysdeps/ieee754/ldbl-64-128/s_log1pl.c (log1p): Remove long_double_symbol. * sysdeps/ieee754/ldbl-128ibm/s_log1pl.c (log1pl): Likewise. * sysdeps/ieee754/ldbl-64-128/w_log1pl.c: New file. * sysdeps/ieee754/ldbl-128ibm/w_log1pl.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_log1p.c: Define empty weak_alias to remove weak_alias for corresponding log1p function. * sysdeps/m68k/m680x0/fpu/s_log1pf.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_log1pl.c: Likewise. * sysdeps/ia64/fpu/w_log1p.c: New file. * sysdeps/ia64/fpu/w_log1pf.c: Likewise. * sysdeps/ia64/fpu/w_log1pl.c: Likewise. * math/libm-test.inc (log1p_test_data): Add errno expectations.
* Update tst_mbrlen/tst_mbrtowc for mblen changeStefan Liebler2015-04-103-6/+13
| | | | | | | | | | | commit 9781a370023952383028e07399fd196a889bb2be changed the expected results for mbrlen in case of passing n=0 to -2. The initialization of tst_mbrlen_loc and tst_mbrtowc should be updated accordingly. * tests-mbwc/dat_mbrlen.c (tst_mbrlen_loc): Change expected result to -2 in case of n == 0. * tests-mbwc/tst_mbrtowc.c (tst_mbrtowc): Check result against -2 instead of 0.
* Fix strtof decimal rounding close to half least subnormal (bug 18247).Joseph Myers2015-04-105-3/+4689
| | | | | | | | | | | | | | | | | | | | | Bug 18247 is an off-by-one error in strtof's determination of a decimal exponent such that any value with that decimal exponent is at most half the least subnormal and so the appropriate underflowing value for the rounding mode can be determined with no multiple-precision computations. (Whether the value is in fact safe despite the off-by-one depends on the floating-point format in question. It's wrong for float and for m68k ldbl-96 but not for other supported formats.) This patch corrects the computation of the exponent in question to be safe in general, adding a comment explaining the new computation. Tested for x86_64. [BZ #18247] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Decrease minimum decimal exponent by 1. * stdlib/tst-strtod-round-data: Add more tests. * stdlib/tst-strtod-round.c (tests): Regenerated.
* Add more tests of clog and clog10.Joseph Myers2015-04-095-108/+1585
| | | | | | | | | | | | This patch adds some randomly-generated tests of clog and clog10 that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of clog and clog10. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Omit libc-modules.h for all .v.i files.Roland McGrath2015-04-092-10/+9
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* Let non-add-on preconfigure scripts set libc_config_ok.Roland McGrath2015-04-093-6/+12
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* Make test-skeleton.c grok TEST_DIRECT magic environment variable.Roland McGrath2015-04-092-5/+53
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* scratch_buffer: Suppress truncation warning on 32-bitFlorian Weimer2015-04-092-2/+7
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* Update SPARC ulps.David S. Miller2015-04-082-88/+175
| | | | * sysdeps/sparc/fpu/libm-test-ulps: Update.
* Add more tests of atanh.Joseph Myers2015-04-085-7/+144
| | | | | | | | | | | | This patch adds some randomly-generated tests of atanh that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of atanh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Add more tests of atan.Joseph Myers2015-04-085-2/+97
| | | | | | | | | | | | This patch adds some randomly-generated tests of atan that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of atan. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* nscd_getgr_r: Use struct scratch_buffer instead of extend_allocaFlorian Weimer2015-04-082-9/+10
| | | | | The lack of alloca accounting means that the old code could run out of stack space if multiple retries are needed.
* getnameinfo: Use struct scratch_buffer instead of extend_allocaFlorian Weimer2015-04-082-27/+59
| | | | This patch adjusts the internal function nrl_domainname, too.
* _nss_compat_initgroups_dyn: Use struct scratch_buffer instead of extend_allocaFlorian Weimer2015-04-082-22/+9
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* grp: Rewrite to use struct scratch_buffer instead of extend_allocaFlorian Weimer2015-04-084-19/+16
| | | | | grp/compat-initgroups.c is included from nscd/initgrcache.c, which is why the #include directive has to be added there as well.
* pldd: Use struct scratch_buffer instead of extend_allocaFlorian Weimer2015-04-083-19/+43
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* Add more tests of cbrt.Joseph Myers2015-04-084-8/+206
| | | | | | | | | | | This patch adds some randomly-generated tests of cbrt that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of cbrt. * math/auto-libm-test-out: Regenerated. * sysdeps/x86_64/fpu/libm-test-ulps: Update.
* Add more tests of cabs.Joseph Myers2015-04-085-0/+201
| | | | | | | | | | | | This patch adds some randomly-generated tests of cabs that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of cabs. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix dbl-64 atan2 in non-default rounding modes (bug 18210, bug 18211).Joseph Myers2015-04-087-37/+893
| | | | | | | | | | | | | | | | | | | | | | The dbl-64 implementation of atan2 does computations that expect to run in round-to-nearest mode, and in other modes the errors can accumulate to more than the maximum accepted 9ulp. This patch makes it use FE_TONEAREST internally, similar to other functions with such issues. Tests that previously produced large errors are added for atan2 and the closely related carg, clog and clog10 functions. Tested for x86_64 and x86 and ulps updated accordingly. [BZ #18210] [BZ #18211] * sysdeps/ieee754/dbl-64/e_atan2.c: Include <fenv.h>. (__ieee754_atan2): Set FE_TONEAREST mode for internal computations. * math/auto-libm-test-in: Add more tests of atan2, carg, clog and clog10. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix dbl-64 atan in non-default rounding modes (bug 18197).Joseph Myers2015-04-085-1/+63
| | | | | | | | | | | | | | | The dbl-64 implementation of atan does computations that expect to run in round-to-nearest mode, and in other modes the errors can accumulate to more than the maximum accepted 9ulp. This patch makes it use FE_TONEAREST internally, similar to other functions with such issues. Tested for x86_64 and x86; no ulps updates needed. [BZ #18197] * sysdeps/ieee754/dbl-64/s_atan.c: Include <fenv.h>. (atan): Set FE_TONEAREST mode for internal computations. * math/auto-libm-test-in: Add more tests of atan. * math/auto-libm-test-out: Regenerated.
* [BZ #17930] MIPS: Define SHM_NORESERVE.James Cowgill2015-04-073-4/+10
| | | | | [BZ #17930] * sysdeps/unix/sysv/linux/mips/bits/shm.h (SHM_NORESERVE): Define.
* scratch_buffer_grow_preserve: Add missing #include <string.h>Florian Weimer2015-04-072-0/+5
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* Add struct scratch_buffer and its internal helper functionsFlorian Weimer2015-04-078-2/+487
| | | | These will be used from NSS modules, so they have to be exported.
* math/test-fenvinline: Cast fe_exc to unsigned int before printingRichard Henderson2015-04-062-2/+5
| | | | | | On Alpha and IA-64, fexcept_t is unsigned long. But all the values fit within an int, so the cast is ok for printing. All other hosts use unsigned int or unsigned short already.
* alpha: Update libm-test-ulpsRichard Henderson2015-04-062-160/+124
| | | | Regenerated from scratch.
* alpha: Unconditionally include dl-sysdep.h in sysdep.hRichard Henderson2015-04-062-5/+5
| | | | Fixes a -Wundef error wrt RTLD_PRIVATE_ERRNO.
* Handle mblen return code when n is zero.Ondřej Bílka2015-04-034-5/+17
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* Define libc_max_align_t for internal useFlorian Weimer2015-04-022-0/+13
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* aarch64: Increase MINSIGSTKSZ and SIGSTKSZ (bug 16850)Andreas Schwab2015-04-023-6/+65
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* malloc: Consistently apply trim_threshold to all heaps [BZ #17195]Mel Gorman2015-04-023-9/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Trimming heaps is a balance between saving memory and the system overhead required to update page tables and discard allocated pages. The malloc option M_TRIM_THRESHOLD is a tunable that users are meant to use to decide where this balance point is but it is only applied to the main arena. For scalability reasons, glibc malloc has per-thread heaps but these are shrunk with madvise() if there is one page free at the top of the heap. In some circumstances this can lead to high system overhead if a thread has a control flow like while (data_to_process) { buf = malloc(large_size); do_stuff(); free(buf); } For a large size, the free() will call madvise (pagetable teardown, page free and TLB flush) every time followed immediately by a malloc (fault, kernel page alloc, zeroing and charge accounting). The kernel overhead can dominate such a workload. This patch allows the user to tune when madvise gets called by applying the trim threshold to the per-thread heaps and using similar logic to the main arena when deciding whether to shrink. Alternatively if the dynamic brk/mmap threshold gets adjusted then the new values will be obeyed by the per-thread heaps. Bug 17195 was a test case motivated by a problem encountered in scientific applications written in python that performance badly due to high page fault overhead. The basic operation of such a program was posted by Julian Taylor https://sourceware.org/ml/libc-alpha/2015-02/msg00373.html With this patch applied, the overhead is eliminated. All numbers in this report are in seconds and were recorded by running Julian's program 30 times. pyarray glibc madvise 2.21 v2 System min 1.81 ( 0.00%) 0.00 (100.00%) System mean 1.93 ( 0.00%) 0.02 ( 99.20%) System stddev 0.06 ( 0.00%) 0.01 ( 88.99%) System max 2.06 ( 0.00%) 0.03 ( 98.54%) Elapsed min 3.26 ( 0.00%) 2.37 ( 27.30%) Elapsed mean 3.39 ( 0.00%) 2.41 ( 28.84%) Elapsed stddev 0.14 ( 0.00%) 0.02 ( 82.73%) Elapsed max 4.05 ( 0.00%) 2.47 ( 39.01%) glibc madvise 2.21 v2 User 141.86 142.28 System 57.94 0.60 Elapsed 102.02 72.66 Note that almost a minutes worth of system time is eliminted and the program completes 28% faster on average. To illustrate the problem without python this is a basic test-case for the worst case scenario where every free is a madvise followed by a an alloc /* gcc bench-free.c -lpthread -o bench-free */ static int num = 1024; void __attribute__((noinline,noclone)) dostuff (void *p) { } void *worker (void *data) { int i; for (i = num; i--;) { void *m = malloc (48*4096); dostuff (m); free (m); } return NULL; } int main() { int i; pthread_t t; void *ret; if (pthread_create (&t, NULL, worker, NULL)) exit (2); if (pthread_join (t, &ret)) exit (3); return 0; } Before the patch, this resulted in 1024 calls to madvise. With the patch applied, madvise is called twice because the default trim threshold is high enough to avoid this. This a more complex case where there is a mix of frees. It's simply a different worker function for the test case above void *worker (void *data) { int i; int j = 0; void *free_index[num]; for (i = num; i--;) { void *m = malloc ((i % 58) *4096); dostuff (m); if (i % 2 == 0) { free (m); } else { free_index[j++] = m; } } for (; j >= 0; j--) { free(free_index[j]); } return NULL; } glibc 2.21 calls malloc 90305 times but with the patch applied, it's called 13438. Increasing the trim threshold will decrease the number of times it's called with the option of eliminating the overhead. ebizzy is meant to generate a workload resembling common web application server workloads. It is threaded with a large working set that at its core has an allocation, do_stuff, free loop that also hits this case. The primary metric of the benchmark is records processed per second. This is running on my desktop which is a single socket machine with an I7-4770 and 8 cores. Each thread count was run for 30 seconds. It was only run once as the performance difference is so high that the variation is insignificant. glibc 2.21 patch threads 1 10230 44114 threads 2 19153 84925 threads 4 34295 134569 threads 8 51007 183387 Note that the saving happens to be a concidence as the size allocated by ebizzy was less than the default threshold. If a different number of chunks were specified then it may also be necessary to tune the threshold to compensate This is roughly quadrupling the performance of this benchmark. The difference in system CPU usage illustrates why. ebizzy running 1 thread with glibc 2.21 10230 records/s 306904 real 30.00 s user 7.47 s sys 22.49 s 22.49 seconds was spent in the kernel for a workload runinng 30 seconds. With the patch applied ebizzy running 1 thread with patch applied 44126 records/s 1323792 real 30.00 s user 29.97 s sys 0.00 s system CPU usage was zero with the patch applied. strace shows that glibc running this workload calls madvise approximately 9000 times a second. With the patch applied madvise was called twice during the workload (or 0.06 times per second). 2015-02-10 Mel Gorman <mgorman@suse.de> [BZ #17195] * malloc/arena.c (free): Apply trim threshold to per-thread heaps as well as the main arena.
* Limit threads sharing L2 cache to 2 for SLM/KNLH.J. Lu2015-03-313-1/+30
| | | | | | | | | | Silvermont and Knights Landing have a modular system design with two cores sharing an L2 cache. If more than 2 cores are detected to shared L2 cache, it should be adjusted for Silvermont and Knights Landing. [BZ #18185] * sysdeps/x86_64/cacheinfo.c (init_cacheinfo): Limit threads sharing L2 cache to 2 for Silvermont/Knights Landing.
* Add a testcase for copy reloc against protected dataH.J. Lu2015-03-3110-0/+763
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Linkers in some versions of binutils 2.25 and 2.26 don't support protected data symbol with error messsage like: /usr/bin/ld: copy reloc against protected `bar' is invalid /usr/bin/ld: failed to set dynamic section sizes: Bad value We check if linker supports copy reloc against protected data symbol to avoid running the test if linker is broken. [BZ #17711] * config.make.in (have-protected-data): New. * configure.ac: Check linker support for protected data symbol. * configure: Regenerated. * elf/Makefile (modules-names): Add tst-protected1moda and tst-protected1modb if $(have-protected-data) is yes. (tests): Add tst-protected1a and tst-protected1b if $(have-protected-data) is yes. ($(objpfx)tst-protected1a): New. ($(objpfx)tst-protected1b): Likewise. (tst-protected1modb.so-no-z-defs): Likewise. * elf/tst-protected1a.c: New file. * elf/tst-protected1b.c: Likewise. * elf/tst-protected1mod.h: Likewise. * elf/tst-protected1moda.c: Likewise. * elf/tst-protected1modb.c: Likewise.
* Add ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA to x86H.J. Lu2015-03-317-6/+111
| | | | | | | | | | | | | | | | | | | | | | | | | | | | With copy relocation, address of protected data defined in the shared library may be external. When there is a relocation against the protected data symbol within the shared library, we need to check if we should skip the definition in the executable copied from the protected data. This patch adds ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA and defines it for x86. If ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA isn't 0, do_lookup_x will skip the data definition in the executable from copy reloc. [BZ #17711] * elf/dl-lookup.c (do_lookup_x): When UNDEF_MAP is NULL, which indicates it is called from do_lookup_x on relocation against protected data, skip the data definion in the executable from copy reloc. (_dl_lookup_symbol_x): Pass ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA, instead of ELF_RTYPE_CLASS_PLT, to do_lookup_x for EXTERN_PROTECTED_DATA relocation against STT_OBJECT symbol. * sysdeps/generic/ldsodefs.h * (ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA): New. Defined to 4 if DL_EXTERN_PROTECTED_DATA is defined, otherwise to 0. * sysdeps/i386/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New. * sysdeps/i386/dl-machine.h (elf_machine_type_class): Set class to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_386_GLOB_DAT. * sysdeps/x86_64/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New. * sysdeps/x86_64/dl-machine.h (elf_machine_type_class): Set class to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_X86_64_GLOB_DAT.
* NPTL: Remove duplicate definition of PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NPMartin Galvan2015-03-282-2/+5
| | | | | The PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP macro was defined twice with the same values in pthread.h; this removes the second definition.
* NPTL: swap comments for THREAD_SETMEM and THREAD_SETMEM_NC for i386 and x86_64Martin Galvan2015-03-283-4/+11
| | | | | The comments for THREAD_SETMEM and THREAD_SETMEM_NC were swapped for i386 and x86_64; this patch fixes that.
* Convert dlfcn/tststatic to use test-skeleton.Roland McGrath2015-03-272-2/+12
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* Harden powerpc64 elf_machine_fixup_pltAlan Modra2015-03-262-5/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | IFUNC is difficult to correctly implement on any target needing a GOT to support position independent code, due to the dependency on order of dynamic relocations. ld.so should be changed to apply IFUNC relocations last, globally, because without that it is actually impossible to write an IFUNC resolver in C that works in all situations. Case in point, vfork in libpthread.so is an IFUNC with the resolver returning &__libc_vfork. (system and fork are similar.) If another shared library, libA say, uses vfork then it is quite possible that libpthread.so hasn't been dynamically relocated before the unfortunate libA is dynamically relocated. In that case the GOT entry for &__libc_vfork is still zero, so the IFUNC resolver returns NULL. LD_BIND_NOW=1 results in libA PLT dynamic relocations being applied using this NULL value and ld.so segfaults. This patch hardens ld.so to not segfault on a NULL from an IFUNC resolver. It also fixes a problem with undefined weak. If you leave the plt entry as-is for undefined weak then if the entry is ever called it will loop in ld.so rather than segfaulting. * sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_fixup_plt): Don't segfault if ifunc resolver returns a NULL. Do set plt to zero for undefined weak. (elf_machine_plt_conflict): Similarly.
* Add more tests of acosh, asinh and atanh.Joseph Myers2015-03-255-63/+853
| | | | | | | | | | | | | This patch adds some randomly-generated tests of acosh, asinh and atanh that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of acosh, asinh and atanh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Add another test of asin.Joseph Myers2015-03-255-4/+35
| | | | | | | | | | | | This patch adds a randomly-generated test of asin that is observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add another test of asin. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Remove unused macros from i386 lowlevellock.h.Joseph Myers2015-03-252-18/+5
| | | | | | | | | | | | | | In the course of the work on six-argument syscalls I noticed that the i386 lowlevellock.h contained some unused macro definitions (already unused before my patch). This patch removes them. Tested for x86 that installed stripped shared libraries are unchanged by this patch. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (LLL_EBX_LOAD): Remove macro. (LLL_EBX_REG): Likewise. (LLL_ENTER_KERNEL): Likewise.
* Add more tests of asin.Joseph Myers2015-03-255-0/+251
| | | | | | | | | | | | This patch adds some randomly-generated tests of asin that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of asin. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Support six-argument syscalls from C for 32-bit x86, use generic ↵Joseph Myers2015-03-256-153/+128
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lowlevellock-futex.h (bug 18138). This patch follows the approach outlined in <https://sourceware.org/ml/libc-alpha/2015-03/msg00656.html> to support six-argument syscalls from INTERNAL_SYSCALL for 32-bit x86, making them call a function __libc_do_syscall that takes the syscall number and three syscall arguments in the registers in which the kernel expects them, along with a pointer to a structure containing the other three arguments. In turn, this allows the generic lowlevellock-futex.h to be used on 32-bit x86, so supporting lll_futex_timed_wait_bitset (and so allowing FUTEX_CLOCK_REALTIME to be used in various cases, so fixing bug 18138 for 32-bit x86 and leaving hppa as the only architecture missing lll_futex_timed_wait_bitset). The change to lowlevellock.h's definition of SYS_futex is because the generic lowlevelloc-futex.h ends up bringing in bits/syscall.h which defines SYS_futex to __NR_futex, so resulting in redefinition errors. The revised definition in lowlevellock.h is in line with what the x86_64 version does. __libc_do_syscall is only needed in libpthread at present (meaning nothing special needs to be done to make it shared-only in most libraries containing it, static in libc only, as on ARM). Tested for 32-bit x86, with the glibc testsuite and with the test in bug 18138. The failures seen FAIL: nptl/tst-cleanupx4 FAIL: rt/tst-cpuclock2 are pre-existing. [BZ #18138] * sysdeps/unix/sysv/linux/i386/sysdep.h (struct libc_do_syscall_args): New structure. (INTERNAL_SYSCALL_MAIN_0): New macro. (INTERNAL_SYSCALL_MAIN_1): Likewise. (INTERNAL_SYSCALL_MAIN_2): Likewise. (INTERNAL_SYSCALL_MAIN_3): Likewise. (INTERNAL_SYSCALL_MAIN_4): Likewise. (INTERNAL_SYSCALL_MAIN_5): Likewise. (INTERNAL_SYSCALL_MAIN_6): Likewise. Call __libc_do_syscall. (INTERNAL_SYSCALL): Define to use INTERNAL_SYSCALL_MAIN_##nr. Replace conditional definitions by conditional definitions of .... (INTERNAL_SYSCALL_MAIN_INLINE): ... this. New macro. * sysdeps/unix/sysv/linux/i386/libc-do-syscall.S: New file. * sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = nptl] (libpthread-sysdep_routines): Add libc-do-syscall. * sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h: Remove file. * sysdeps/unix/sysv/linux/i386/lowlevellock.h (SYS_futex): Define to __NR_futex not 240.
* powerpc __tls_get_addr call optimizationAlan Modra2015-03-2514-4/+228
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is glibc support for a PowerPC TLS optimization, inspired by Alexandre Oliva's TLS optimization for other processors, http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-x86.txt In essence, this optimization uses a zero module id in the tls_index GOT entry to indicate that a TLS variable is allocated space in the static TLS area. A special plt call linker stub for __tls_get_addr checks for such a tls_index and if found, returns the offset immediately. The linker communicates the fact that the special __tls_get_addr stub is used by setting a bit in the dynamic tag DT_PPC64_OPT/DT_PPC_OPT. glibc communicates to the linker that this optimization is available by the presence of __tls_get_addr_opt. tst-tlsmod2.so is built with -Wl,--no-tls-get-addr-optimize for tst-tls-dlinfo, which otherwise would fail since it tests that no static tls is allocated. The ld option --no-tls-get-addr-optimize has been available since binutils-2.20 so doesn't need a configure test. * NEWS: Advertise TLS optimization. * elf/elf.h (R_PPC_TLSGD, R_PPC_TLSLD, DT_PPC_OPT, PPC_OPT_TLS): Define. (DT_PPC_NUM): Increment. * elf/dynamic-link.h (HAVE_STATIC_TLS): Define. (CHECK_STATIC_TLS): Use here. * sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela): Optimize TLS descriptors. * sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/powerpc/dl-tls.c: New file. * sysdeps/powerpc/Versions: Add __tls_get_addr_opt. * sysdeps/powerpc/tst-tlsopt-powerpc.c: New tls test. * sysdeps/unix/sysv/linux/powerpc/Makefile: Add new test. Build tst-tlsmod2.so with --no-tls-get-addr-optimize. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ld.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/ld.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/ld-le.abilist: Likewise.
* powerpc64 configure messageAlan Modra2015-03-253-3/+9
| | | | | | | | | This feature doesn't depend on the linker, as can be seen from the actual test. It's a compiler feature. * sysdeps/powerpc/powerpc64/configure.ac: Correct "linker support for overlapping .opd entries" to "support...". * sysdeps/powerpc/powerpc64/configure: Regenerate
* Add more tests of acos.Joseph Myers2015-03-255-12/+429
| | | | | | | | | | | | This patch adds some randomly-generated tests of acos that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of acos. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Add more tests of expm1.Joseph Myers2015-03-255-16/+331
| | | | | | | | | | | | This patch adds some randomly-generated tests of expm1 that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of expm1. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Add more tests of cosh, sinh.Joseph Myers2015-03-245-18/+578
| | | | | | | | | | | | This patch adds some randomly-generated tests of cosh and sinh that are observed to increase ulps on x86_64. Tested for x86_64 and x86 and ulps updated accordingly. * math/auto-libm-test-in: Add more tests of cosh and sinh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Regenerate x86_64, x86 ulps from scratch.Joseph Myers2015-03-243-242/+42
| | | | | | | | | | | | | | | | | | | | | | | The x86_64 and x86 libm-test-ulps files hadn't been regenerated from scratch for some time, as evidenced by the presence of entries for *_tonearest functions (those tests duplicated the default-rounding-mode tests, and such duplicates are no longer run). The aarch64, alpha, hppa, ia64, m68k, microblaze, powerpc, s390, sh, sparc, tile files similarly could do with from-scratch regeneration as evidenced by the presence of such entries. (Truncate the existing file then run "make regen-ulps" and move the resulting file into place.) This patch regenerates the x86_64 and x86 files from scratch. It's likely some of the reduced / removed ulps will need restoring because they appear on processors or compiler versions other than the one I tested on, but in such cases I'd like to first see if I can generate new tests that show such ulps on the Intel processor I'm testing on, to reduce the effects from different people using different processors and compilers to regenerate the ulps. * sysdeps/i386/fpu/libm-test-ulps: Regenerated. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-23 03:38:24 +0000