glibc

Commit Graph

Author	SHA1	Message	Date
Joseph Myers	a0f8b11520	Fix sigwait namespace (bug 21550). sigwait was added to POSIX in 1995; it is not in older POSIX versions or XPG4 / XPG4.2. Thus it should be declared only if __USE_POSIX199506; signal.h wrongly declares it for __USE_POSIX. (sigwaitinfo is correctly conditioned on __USE_POSIX199309.) This patch fixes the condition on the declaration of sigwait. Tested for x86_64. Because of other namespace problems this does not allow any conform/ XFAILs to be removed. [BZ #21550] * signal/signal.h (sigwait): Only declare if [__USE_POSIX199506].	9 years ago
H.J. Lu	5a103908c0	x86-64: Implement strcpy family IFUNC selectors in C Implement strcpy family IFUNC selectors in C. All internal calls within libc.so can use IFUNC on x86-64 since unlike x86, x86-64 supports PC-relative addressing to access the GOT entry so that it can call via PLT without using an extra register. For libc.a, we can't use IFUNC for functions which are called before IFUNC has been initialized. Use IFUNC internally reduces the icache footprint since libc.so and other codes in the process use the same implementations. This patch uses IFUNC for strcpy family functions within libc. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strcpy-sse2 and stpcpy-sse2. * sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h: New file. * sysdeps/x86_64/multiarch/stpcpy-sse2.S: Likewise. * sysdeps/x86_64/multiarch/stpcpy.c: Likewise. * sysdeps/x86_64/multiarch/stpncpy.c: Likewise. * sysdeps/x86_64/multiarch/strcpy-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strcpy.c: Likewise. * sysdeps/x86_64/multiarch/strncpy.c: Likewise. * sysdeps/x86_64/multiarch/stpcpy.S: Removed. * sysdeps/x86_64/multiarch/stpncpy.S: Likewise. * sysdeps/x86_64/multiarch/strcpy.S: Likewise. * sysdeps/x86_64/multiarch/strncpy.S: Likewise. * sysdeps/x86_64/multiarch/stpncpy-c.c (weak_alias): New. (libc_hidden_def): Always defined as empty. * sysdeps/x86_64/multiarch/strncpy-c.c (libc_hidden_builtin_def): Always Defined as empty.	9 years ago
Wilco Dijkstra	18b10de7ce	2017-06-12 Wilco Dijkstra <wdijkstr@arm.com> There is no longer a need for string2.h, so remove it and all mention of it. Move the redirect for __stpcpy to include/string.h since it is still required until all internal uses have been renamed. This fixes several linknamespace/localplt failures when building with -Os. [BZ #15105] [BZ #19463] * include/string.h: Add internal redirect for __stpcpy. * string/Makefile: Remove bits/string2.h. * string/string.h: Update comment. * string/string-inlines.c: Remove bits/string2.h include and comment. * string/bits/string2.h: Remove file.	9 years ago
Wilco Dijkstra	d99431e519	Replace all internal uses of __bzero with memset. This removes the need to redirect it to a builtin and means memset is inlined whenever possible, including with -Os. * sunrpc/bindrsvprt.c (bindresvport): Change __bzero to memset. * sunrpc/clnt_gen.c (clnt_create): Likewise. * sunrpc/des_impl.c (_des_crypt): Likewise. * sunrpc/key_call.c (key_gendes): Likewise. * sunrpc/pmap_rmt.c (clnt_broadcast): Likewise. * sunrpc/svc_simple.c (universal): Likewise. * sunrpc/svc_tcp.c (svctcp_create): Likewise. * sunrpc/svc_udp.c (svcudp_bufcreate): Likewise. * sysdeps/arm/aeabi_memclr.c (__aeabi_memclr): Likewise.	9 years ago
Santhosh Thottingal	b05eca0e1d	Correct collation rules for Malayalam. [BZ #19922] * locales/iso14651_t1_common: Add collation rules for U+07DA to U+07DF. [BZ #19919] * locales/iso14651_t1_common: Correct collation of U+0D36 and U+0D37.	9 years ago
Zack Weinberg	8458956a62	Correct an outdated comment in stdlib/errno.h.	9 years ago
Paul Clarke	cdfbe5037f	powerpc: add sysconf support for cache geometries There is currently no "cross-platform" (x86 and POWER) support for determining the cacheline size. This patch adds support to sysconf() to correctly report cacheline sizes based on the information in the auxilliary vector. Thus, using sysconf() is a cross-platform (x86 and POWER) solution for determining cacheline sizes. Support is added (on powerpc) for: _SC_LEVEL1_ICACHE_SIZE _SC_LEVEL1_ICACHE_ASSOC _SC_LEVEL1_ICACHE_LINESIZE _SC_LEVEL1_DCACHE_SIZE _SC_LEVEL1_DCACHE_ASSOC _SC_LEVEL1_DCACHE_LINESIZE _SC_LEVEL2_CACHE_SIZE _SC_LEVEL2_CACHE_ASSOC _SC_LEVEL2_CACHE_LINESIZE _SC_LEVEL3_CACHE_SIZE _SC_LEVEL3_CACHE_ASSOC _SC_LEVEL3_CACHE_LINESIZE * sysdeps/unix/sysv/linux/powerpc/sysconf.c: New file. Add powerpc-specific overrides for L1, L2, L3 CACHE_SIZEs, CACHE_ASSOCs, and CACHE_LINESIZEs, retrieving from auxv. * sysdeps/unix/sysv/linux/powerpc/test-powerpc-linux-sysconf.c: New file. Invoke newly supported sysconf values for powerpc, and report results. If none are supported, report so. * sysdeps/unix/sysv/linux/powerpc/Makefile (tests): Add new test, tst-sysconf.	9 years ago
Tulio Magno Quites Machado Filho	d6bd839b9a	Add a way to bypass the PLT when calling getauxval * include/sys/auxv.h (__getauxval): Add a prototype and its libc_hidden_proto. * misc/getauxval.c (__getauxval): Use libc_hidden_def.	9 years ago
Joseph Myers	a17973efc6	Fix waitid namespace (bug 21561). In sys/wait.h, waitid and associated constants and types are UX-shaded in XPG4.2 (so not in XPG4), and XSI-shaded in POSIX before 2008, so should be appropriately conditional in the headers. This patch fixes the conditionals accordingly. (WCONTINUED is actually still XSI-shaded in POSIX.1:2008, but W* is also reserved there without XSI-shading, so nothing special needs to be done about the conditionals on WCONTINUED to conform to POSIX.1:2008 namespace rules.) Tested for x86_64. [BZ #21561] * posix/sys/wait.h (idtype_t): Change [__USE_XOPEN] condition to [__USE_XOPEN_EXTENDED]. (id_t): Likewise. (include of <bits/types/siginfo_t.h): Likewise. (waitid): Likewise. * sysdeps/unix/sysv/linux/bits/waitflags.h (WSTOPPED): Condition on [__USE_XOPEN_EXTENDED \|\| __USE_XOPEN2K8]. (WEXITED): Likewise. (WCONTINUED): Likewise. (WNOWAIT): Likewise. * conform/Makefile (test-xfail-XPG4/stdlib.h/conform): Remove. (test-xfail-XPG4/sys/wait.h/conform): Likewise. (test-xfail-POSIX/sys/wait.h/conform): Likewise.	9 years ago
Joseph Myers	10d33c5a86	Update nios2, sparc32 localplt.data files for recent GCC change. A recent GCC change to expand floating-point classification built-in functions inline using integer rather than floating-point arithmetic in some cases resulted in localplt test failures for nios2 and sparc32 <https://sourceware.org/ml/libc-testresults/2017-q2/msg00320.html>. This patch updates the localplt.data files in question to mark the relevant symbols as optional / add a new optional symbol. (The GCC patch has been reverted because of other problems it caused, but one can assume it will be applied again, without changes that would affect the PLT entries generated, once those issues have been resolved.) Tested with build-many-glibcs.py. * sysdeps/unix/sysv/linux/nios2/localplt.data (__gtdf2): Mark libc.so PLT entry optional. (__gtsf2): Likewise. (__unorddf2): Likewise. (__unordsf2): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/localplt.data (_Q_fgt): New optional libc.so PLT entry.	9 years ago
Joseph Myers	b85995291e	Fix sigpause namespace (bug 21554). The sigpause function is declared for __USE_XOPEN. As it's new in XPG4.2 it should be declared only for __USE_XOPEN_EXTENDED. This patch fixes the declaration accordingly. Tested for x86_64. [BZ #21554] * signal/signal.h (sigpause):: Declare if [__USE_XOPEN_EXTENDED], not [__USE_XOPEN].	9 years ago
Joseph Myers	0862cdcdc8	Condition signal.h inclusion in sys/wait.h (bug 21560). sys/wait.h includes signal.h unconditionally. But the permission to do so is UX-shaded in XPG4.2, and XSI-shaded in POSIX before 2008, so this should not be unconditional. This patch fixes this conservatively: the include is kept, but conditioned on the standards that permit it (meaning it is still present by default, because non-XSI POSIX.1:2008 is enabled by default). <bits/types.h> is now included unconditionally to provide the required definition of __pid_t; it was previously included via <signal.h>. Some standards require pid_t to be defined here, and all allow it to be defined here; previously defined via <signal.h>, it's now defined directly in this header. Tested for x86_64. This does not fix any of the sys/wait.h conformtest failures, but substantially reduces the number of namespace failures for sys/wait.h for XPG4 and POSIX. [BZ #21560] * posix/sys/wait.h: Condition include of <signal.h> on [__USE_XOPEN_EXTENDED \|\| __USE_XOPEN2K8]. Include <bits/types.h> unconditionally. [!__pid_t_defined] (pid_t): Define typedef.	9 years ago
Zack Weinberg	b4971123e9	Remove bare use of __attribute__ in include/errno.h. This is just a style fix; we always prefer the shorthand macros over bare uses of __attribute__, even in private headers. * include/errno.h (__errno_location): Use __attribute_const__ instead of bare __attribute__.	9 years ago
Zack Weinberg	65b6d8b79c	Polish the treatment of dl-tunable-list.h in Makeconfig. Like basically all before-compile headers, dl-tunable-list.h should be generated using a stamp file to minimize unnecessary rebuilding; it wasn't being added to common-generated, so it wouldn't get cleaned up; and it was in between the rules for libc-modules.h/.stmp and their own addition to common-generated. * Makeconfig (dl-tunable-list.h): Generate using a stamp file. (common-generated): Add libc-modules.h and libc-modules.stmp in a more appropriate location. Also add dl-tunable-list.h and dl-tunable-list.stmp.	9 years ago
H.J. Lu	6b6710e55b	x86-64: Correct comments in ifunc-impl-list.c * sysdeps/x86_64/multiarch/ifunc-impl-list.c: Correct comments.	9 years ago
H.J. Lu	d2538b9156	x86-64: Optimize strrchr/wcsrchr with AVX2 Optimize strrchr/wcsrchr with AVX2 to check 32 bytes with vector instructions. It is as fast as SSE2 version for small data sizes and up to 1X faster for large data sizes on Haswell. Select AVX2 version on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strrchr-sse2, strrchr-avx2, wcsrchr-sse2 and wcsrchr-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for __strrchr_avx2, __strrchr_sse2, __wcsrchr_avx2 and __wcsrchr_sse2. * sysdeps/x86_64/multiarch/strrchr-avx2.S: New file. * sysdeps/x86_64/multiarch/strrchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strrchr.c: Likewise. * sysdeps/x86_64/multiarch/wcsrchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcsrchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wcsrchr.c: Likewise.	9 years ago
H.J. Lu	5ac7aa1d7c	x86-64: Optimize memrchr with AVX2 Optimize memrchr with AVX2 to search 32 bytes with a single vector compare instruction. It is as fast as SSE2 memrchr for small data sizes and up to 1X faster for large data sizes on Haswell. Select AVX2 memrchr on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memrchr-sse2 and memrchr-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for __memrchr_avx2 and __memrchr_sse2. * sysdeps/x86_64/multiarch/memrchr-avx2.S: New file. * sysdeps/x86_64/multiarch/memrchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/memrchr.c: Likewise.	9 years ago
H.J. Lu	8fe57365bf	x86-64: Optimize strchr/strchrnul/wcschr with AVX2 Optimize strchr/strchrnul/wcschr with AVX2 to search 32 bytes with vector instructions. It is as fast as SSE2 versions for size <= 16 bytes and up to 1X faster for or size > 16 bytes on Haswell. Select AVX2 version on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strchr-sse2, strchrnul-sse2, strchr-avx2, strchrnul-avx2, wcschr-sse2 and wcschr-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for __strchr_avx2, __strchrnul_avx2, __strchrnul_sse2, __wcschr_avx2 and __wcschr_sse2. * sysdeps/x86_64/multiarch/strchr-avx2.S: New file. * sysdeps/x86_64/multiarch/strchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strchr.c: Likewise. * sysdeps/x86_64/multiarch/strchrnul-avx2.S: Likewise. * sysdeps/x86_64/multiarch/strchrnul-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strchrnul.c: Likewise. * sysdeps/x86_64/multiarch/wcschr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcschr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wcschr.c: Likewise. * sysdeps/x86_64/multiarch/strchr.S: Removed.	9 years ago
H.J. Lu	dc485ceb2a	x86-64: Optimize strlen/strnlen/wcslen/wcsnlen with AVX2 Optimize strlen/strnlen/wcslen/wcsnlen with AVX2 to check 32 bytes with a single vector compare instruction. It is as fast as SSE2 versions for size <= 16 bytes and up to 1X faster for or size > 16 bytes on Haswell. Select AVX2 version on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strlen-sse2, strnlen-sse2, strlen-avx2, strnlen-avx2, wcslen-sse2, wcslen-avx2 and wcsnlen-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for __strlen_avx2, __strlen_sse2, __strnlen_avx2, __strnlen_sse2, __wcslen_avx2, __wcslen_sse2 and __wcsnlen_avx2. * sysdeps/x86_64/multiarch/strlen-avx2.S: New file. * sysdeps/x86_64/multiarch/strlen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strlen.c: Likewise. * sysdeps/x86_64/multiarch/strnlen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/strnlen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strnlen.c: Likewise. * sysdeps/x86_64/multiarch/wcslen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcslen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wcslen.c: Likewise. * sysdeps/x86_64/multiarch/wcsnlen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcsnlen.c (OPTIMIZE (avx2)): New. (IFUNC_SELECTOR): Return OPTIMIZE (avx2) on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast.	9 years ago
H.J. Lu	2f5d20ac99	x86-64: Optimize memchr/rawmemchr/wmemchr with SSE2/AVX2 SSE2 memchr is extended to support wmemchr. AVX2 memchr/rawmemchr/wmemchr are added to search 32 bytes with a single vector compare instruction. AVX2 memchr/rawmemchr/wmemchr are as fast as SSE2 memchr/rawmemchr/wmemchr for small sizes and up to 1.5X faster for larger sizes on Haswell and Skylake. Select AVX2 memchr/rawmemchr/wmemchr on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. * sysdeps/x86_64/memchr.S (MEMCHR): New. Depending on if USE_AS_WMEMCHR is defined. (PCMPEQ): Likewise. (memchr): Renamed to ... (MEMCHR): This. Support wmemchr if USE_AS_WMEMCHR is defined. Replace pcmpeqb with PCMPEQ. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memchr-sse2, rawmemchr-sse2, memchr-avx2, rawmemchr-avx2, wmemchr-sse4_1, wmemchr-avx2 and wmemchr-c. * sysdeps/x86_64/multiarch/ifunc-avx2.h: New file. * sysdeps/x86_64/multiarch/memchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/memchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/memchr.c: Likewise. * sysdeps/x86_64/multiarch/rawmemchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/rawmemchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/rawmemchr.c: Likewise. * sysdeps/x86_64/multiarch/wmemchr-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wmemchr-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wmemchr.c: Likewise. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Test __memchr_avx2, __memchr_sse2, __rawmemchr_avx2, __rawmemchr_sse2, __wmemchr_avx2 and __wmemchr_sse2.	9 years ago
Florian Weimer	990c32b93a	malloc: Remove tst-dynarray, tst-dynarray-fail from test-srcs They are already covered through the tests variable.	9 years ago
Florian Weimer	48bd8cda09	support: Expose TEST_VERIFY_EXIT behavior to GCC optimizers Previously, the implementation would conditionally exit based on the status argument, which GCC did not know about. This leads to false uninitialized variable warnings when data is accessed after a TEST_VERIFY_EXIT failure (from code which would never execute).	9 years ago
Siddhesh Poyarekar	6c85cc2852	aarch64: Fix undefined behavior in _dl_procinfo 1 << 31 is undefined, so replace it with a cleaner check. Also remove magic numbers in comments. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h: Remove mention of magic numbers in comments. (_dl_procinfo): Fix undefined behavior	9 years ago
Joseph Myers	ab70273bb7	conformtest: Correct sys/wait.h expectations for XPG4. This patch corrects the conformtest expectations for sys/wait.h for XPG4. This does not change the test results for this header at the makefile level since it fixes some spurious failures for this header while introducing other failures previously hidden by incorrect expectations. However, it shows up issues with stdlib.h for XPG4 defining W* names that are not permitted in this case (previously wrongly allowed; the W* reservation is UX-shaded in XPG4.2 / XSI-shaded in POSIX before 2008); that test is thus XFAILed. Tested for x86_64. * conform/data/sys/wait.h-data (WIFCONTINUED): Do not expect for [XPG4]. (WEXITED): Likewise. (WSTOPPED): Likewise. (WCONTINUED): Likewise. (WNOHANG): Likewise. (WNOWAIT): Likewise. (idtype_t): Likewise. (P_ALL): Likewise. (P_PID): Likewise. (P_PGID): Likewise. (id_t): Likewise. (siginfo_t): Likewise. (wait3): Likewise. (waitid): Likewise. (signal.h): Do not allow header for [XPG4]. (sys/resource.h): Likewise. (si_): Do not allow for [XPG4]. (W): Likewise. (P_): Likewise. (BUS_): Likewise. (CLD_): Likewise. (FPE_): Likewise. (ILL_): Likewise. (POLL_): Likewise. (SEGV_): Likewise. (SI_): Likewise. (TRAP_): Likewise. conform/Makefile (test-xfail-XPG4/stdlib.h/conform): New variable.	9 years ago
H.J. Lu	37b66c0b1a	ld.so: Consolidate 2 strtouls into _dl_strtoul [BZ #21528 ] There are 2 minimal strtoul implementations in ld.so: 1. __strtoul_internal in elf/dl-minimal.c. 2. tunables_strtoul in elf/dl-tunables.c. This patch adds _dl_strtoul to replace them. Tested builds with and without --enable-tunables. [BZ #21528] * elf/dl-minimal.c (__strtoul_internal): Removed. (strtoul): Likewise. * elf/dl-misc.c (_dl_strtoul): New function. * elf/dl-tunables.c (tunables_strtoul): Removed. (tunable_initialize): Replace tunables_strtoul with _dl_strtoul. * elf/rtld.c (process_envvars): Likewise. * sysdeps/unix/sysv/linux/dl-librecon.h (_dl_osversion_init): Likewise. * sysdeps/generic/ldsodefs.h (_dl_strtoul): New prototype.	9 years ago
Zack Weinberg	199fc19d3a	Remove __need macros from stdio.h and wchar.h. wint_t is a little finicky because it might be defined by stddef.h, which belongs to the compiler. In addition to the _types_, a bunch of other declarations shared between wctype.h and wchar.h are factored out to their own header. * libio/bits/types/FILE.h, libio/bits/types/__FILE.h * wcsmbs/bits/types/mbstate_t.h, wcsmbs/bits/types/__mbstate_t.h * wcsmbs/bits/types/wint_t.h: New single-type definition files. * wctype/bits/wctype-wchar.h: New file holding declarations shared between wctype.h and wchar.h. * libio/Makefile, wcsmbs/Makefile, wctype/Makefile: Install them. * include/bits/types/FILE.h, include/bits/types/__FILE.h * include/bits/types/mbstate_t.h, include/bits/types/__mbstate_t.h * include/bits/types/wint_t.h, include/bits/wcsmbs-wchar.h: New wrappers. * include/stdio.h, include/wchar.h, include/wctype.h: No need to handle __need macros. * grp/grp.h, gshadow/gshadow.h, hurd/hurd.h, iconv/gconv.h * libio/stdio.h, mach/mach.h, misc/mntent.h, pwd/pwd.h * shadow/shadow.h, stdio-common/printf.h, wcsmbs/uchar.h * wcsmbs/wchar.h, wctype/wctype.h * sysdeps/generic/_G_config.h, sysdeps/unix/sysv/linux/_G_config.h Use the new files instead of __need macros.	10 years ago
H.J. Lu	4615f5aefe	Add more tests for memchr This patch adds tests for len == 0 and tests for positions close to the beginning, which are equivalent to positions close to the end for memchr. * string/test-memrchr.c (test_main): Add tests for len == 0 and tests for positions close to the beginning, which are equivalent to positions close to the end for memchr.	9 years ago
H.J. Lu	5e1122827a	x86-64: Rename wmemset.h to ifunc-wmemset.h No code changes. * sysdeps/x86_64/multiarch/wmemset.c: Include ifunc-wmemset.h instead of wmemset.h. * sysdeps/x86_64/multiarch/wmemset_chk.c: Likewise. * sysdeps/x86_64/multiarch/wmemset.h: Renamed to ... * sysdeps/x86_64/multiarch/ifunc-wmemset.h: This.	9 years ago
Gabriel F. T. Gomes	cf2046ec7d	float128: Add strfromf128 Add strfromf128 to stdlib when _Float128 support is enabled. * stdio-common/printf-parsemb.c (__parse_one_specmb): Initialize spec->info.is_binary128 to zero. * stdio-common/printf.h (printf_info): Add new member is_binary128 to indicate that the number being converted to string is compatible with the IEC 60559 binary128 format. * stdio-common/printf_fp.c (__printf_fp_l): Add code to deal with _Float128 numbers. * stdio-common/printf_fphex.c: Include ieee754_float128.h and ldbl-128/printf_fphex_macros.h (__printf_fphex): Add code to deal with _Float128 numbers. * stdio-common/printf_size.c (__printf_size): Likewise. * stdio-common/vfprintf.c (process_arg): Initialize member info.is_binary128 to zero. * stdlib/fpioconst.h (FLT128_MAX_10_EXP_LOG): New macro. * stdlib/stdlib.h: Include bits/floatn.h for _Float128 support. (strfromf128): New declaration. * stdlib/strfrom-skeleton.c (STRFROM): Set member info.is_binary128 to one. * sysdeps/ieee754/float128/Makefile: Add strfromf128. * sysdeps/ieee754/float128/Versions: Likewise. * sysdeps/ieee754/float128/strfromf128.c: New file.	10 years ago
Gabriel F. T. Gomes	2bc646c9e9	Refactor PRINT_FPHEX_LONG_DOUBLE into a reusable macro This patch refactors the macro PRINT_FPHEX_LONG_DOUBLE from the file sysdeps/ieee754/ldbl-128/printf_fphex.c into a function-like macro to enable its use for both long double and _Float128, when they are ABI-distinct. * sysdeps/ieee754/ldbl-128/printf_fphex.c: Include ldbl-128/printf_fphex_macros.h for the definition of PRINT_FPHEX. (PRINT_FPHEX_LONG_DOUBLE): Define based on PRINT_FPHEX. * sysdeps/ieee754/ldbl-128/printf_fphex_macros.h (PRINT_FPHEX): New function-like macro that can be used for long double, as well as for _Float128	9 years ago
Gabriel F. T. Gomes	aab0f374e7	Remove duplicated code from __printf_fp_l, __printf_fphex, and __printf_size In __printf_fp_l, __printf_fphex, and __printf_size the blocks of code that are used to read a double or long double argument, check for special values and convert to multiprecision are similar. When adding float128 support to libc, more code would be duplicated to deal with the extra type. This patch moves the repetitive code to a macro which is now used by double and long double and will be used for float128 when support is added, thus avoiding more duplication. Tested for powerpc64le and s390x. * stdio-common/printf_fp.c (PRINTF_FP_FETCH): New macro. (__printf_fp_l): Use the new macro to avoid duplicating code. * stdio-common/printf_fphex.c (PRINTF_FPHEX_FETCH): New macro. (__printf_fphex): Use the new macro to avoid duplicating code. * stdio-common/printf_size.c (PRINTF_SIZE_FETCH): New macro. (__printf_size): Use the new macro to avoid duplicating code.	9 years ago
Gabriel F. T. Gomes	32bf1d09da	float128: Add conversion from float128 to mpn Reuse the code for __mpn_extract_long_double to implement __mpn_extract_float128. * include/gmp.h: Include bits/floatn.h (__mpn_extract_float128): Declare when __HAVE_DISTINCT_FLOAT128 is 1. * stdlib/gmp-impl.h: Also check if alloca is not defined before including stack-alloc.h. It could have been defined by other header which not necessarily defines HAVE_ALLOCA. * sysdeps/ieee754/float128/Makefile: New file. * sysdeps/ieee754/float128/float1282mpn.c: New file. * sysdeps/ieee754/float128/float128_private.h: Include gmp.h before redefining __mpn_extract_long_double to __mpn_extract_float128, then redefine __mpn_extract_long_double to __mpn_extract_float128. * sysdeps/ieee754/ldbl-128/ldbl2mpn.c: Replace long double with _Float128 to allow float128_private.h overrides.	10 years ago
Paul E. Murphy	82c19bdfe3	float128: Extend the power of ten tables Update the power of ten tables used by the common implementation when long double is not the most expressive real type. * stdlib/fpioconst.h: Include bits/floatn.h. (FPIOCONST_HAVE_EXTENDED_RANGE): New macro for testing how big the power of ten table should be. (FPIOCONST_POW10_ARRAY_SIZE): Use larger table if above is true. * stdlib/fpioconst.c (__tens): Use FPIOCONST_HAVE_EXTENDED_RANGE to include larger tables when _Float128 support is enabled. (_fpioconst_pow10): Likewise.	10 years ago
Joseph Myers	81df4d253d	Fix include paths in include/bits/types/.h. Various include/bits/types/.h files do where the path specified is relative to the toplevel glibc source directory. That has the wrong number of ../ components to achieve the desired effect; it actually searches relative to include/ for a file that does not exist there, then goes on to search the #include <> paths specified with -I, eventually finding the desired file via such a path (e.g. sysdeps/nptl/) with the right number of directory components. Before that it searches include/../.. because of the -Iinclude, meaning that an appropriately named file outside the glibc source tree can affect the build. This patch changes all those files to do #include <path> without the ../../, as some such files already do. Tested for x86_64. * include/bits/types/clock_t.h: Use #include <path> instead of #include "../../path". * include/bits/types/clockid_t.h: Likewise. * include/bits/types/struct_iovec.h: Likewise. * include/bits/types/struct_itimerspec.h: Likewise. * include/bits/types/struct_osockaddr.h: Likewise. * include/bits/types/struct_sigstack.h: Likewise. * include/bits/types/struct_timespec.h: Likewise. * include/bits/types/struct_timeval.h: Likewise. * include/bits/types/struct_tm.h: Likewise. * include/bits/types/time_t.h: Likewise. * include/bits/types/timer_t.h: Likewise.	9 years ago
Joseph Myers	bd6193907a	Fix tst-timezone race (bug 14096). I observed a failure of timezone/tst-timezone with the same symptoms as reported in bug 14096. I was unable to reproduce the failure on testing again. However, from inspection, the cause is as follows. tst-timezone uses time zones compiled from the northamerica file, but has no dependency on any such zones, so with a parallel build it is possible that they do not get compiled until after tst-timezone is run. This patch adds a dependency on the compiled America/New_York zone (the one used as a makefile target to cause such zones to be compiled, rather than one which is actually used in that test) to fix the race. Tested for x86_64. [BZ #14096] * timezone/Makefile ($(objpfx)tst-timezone.out): Depend on America/New_York.	9 years ago
H.J. Lu	2e87c7d158	x86-64: Fold ifunc-sse4_1.h into wcsnlen.c Since ifunc-sse4_1.h is included only by wcsnlen.c, we can fold it into wcsnlen.c. No code changes in wcsnlen.o. 2017-06-07 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/x86_64/multiarch/ifunc-sse4_1.h: Removed and folded into ... * sysdeps/x86_64/multiarch/wcsnlen.c: Here. Don't include ifunc-sse4_1.h.	9 years ago
Arjun Shankar	8f0a947cf5	Remove check for NULL buffer passed to `ptsname_r' `ptsname_r' is declared in stdlib.h to only accept a `nonnull' second argument and therefore GCC may choose to make optimizations based on the assumption that this argument is NULL. This means that potentially, GCC can optimize away the NULL check at some point in the future. Since this is a programming interface, we might as well remove the NULL check ourselves. This also warrants a change to the `ptsname_r' manual page that must be submitted to the corresponding mailing list. In addition, remove the NULL buffer test in login/tst-ptsname.c.	9 years ago
Arjun Shankar	fdc543919a	Use test-driver in sysdeps/unix/sysv/linux/tst-clone2.c	9 years ago
Siddhesh Poyarekar	ea01a4da21	aarch64: Add hwcap string routines Add support for routines in dl-procinfo.h to show string versions of HWCAP entries when a program is invoked with the LD_SHOW_AUXV environment variable set and also to aid in path resolution for ldconfig. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c (_dl_aarch64_cap_flags): New array. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h (_dl_hwcap_string, _dl_string_hwcap, _dl_procinfo): Implement functions.	9 years ago
Siddhesh Poyarekar	511c5a1087	Make LD_HWCAP_MASK usable for static binaries The LD_HWCAP_MASK environment variable was ignored in static binaries, which is inconsistent with the behaviour of dynamically linked binaries. This seems to have been because of the inability of ld_hwcap_mask being read early enough to influence anything but now that it is in tunables, the mask is usable in static binaries as well. This feature is important for aarch64, which relies on HWCAP_CPUID being masked out to disable multiarch. A sanity test on x86_64 shows that there are no failures. Likewise for aarch64. * elf/dl-hwcaps.h [HAVE_TUNABLES]: Always read hwcap_mask. * sysdeps/sparc/sparc32/dl-machine.h [HAVE_TUNABLES]: Likewise. * sysdeps/x86/cpu-features.c (init_cpu_features): Always set up hwcap and hwcap_mask.	9 years ago
Siddhesh Poyarekar	f82e9672ad	aarch64: Allow overriding HWCAP_CPUID feature check using HWCAP_MASK Now that LD_HWCAP_MASK (or glibc.tune.hwcap_mask) is read early enough to influence cpu feature check in aarch64, use it to influence multiarch selection. Setting LD_HWCAP_MASK such that it clears HWCAP_CPUID will now disable multiarch for the binary. HWCAP_CPUID is also now set in HWCAP_IMPORTANT so that it is set by default. With this patch, this feature is only usable with dyanmically linked binaries because LD_HWCAP_MASK is not read for static binaries. A future patch fixes that. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (init_cpu_features): Use glibc.tune.hwcap_mask. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h: New file.	9 years ago
Siddhesh Poyarekar	ff08fc59e3	tunables: Use glibc.tune.hwcap_mask tunable instead of _dl_hwcap_mask Drop _dl_hwcap_mask when building with tunables. This completes the transition of hwcap_mask reading from _dl_hwcap_mask to tunables. * elf/dl-hwcaps.h: New file. * elf/dl-hwcaps.c: Include it. (_dl_important_hwcaps)[HAVE_TUNABLES]: Read and update glibc.tune.hwcap_mask. * elf/dl-cache.c: Include dl-hwcaps.h. (_dl_load_cache_lookup)[HAVE_TUNABLES]: Read glibc.tune.hwcap_mask. * sysdeps/sparc/sparc32/dl-machine.h: Likewise. * elf/dl-support.c (_dl_hwcap2)[HAVE_TUNABLES]: Drop _dl_hwcap_mask. * elf/rtld.c (rtld_global_ro)[HAVE_TUNABLES]: Drop _dl_hwcap_mask. (process_envvars)[HAVE_TUNABLES]: Likewise. * sysdeps/generic/ldsodefs.h (rtld_global_ro)[HAVE_TUNABLES]: Likewise. * sysdeps/x86/cpu-features.c (init_cpu_features): Don't initialize dl_hwcap_mask when tunables are enabled.	9 years ago
Siddhesh Poyarekar	6482e63403	Add include guards to dl-procinfo.h The dl-procinfo.h for linux/s390 and linux/i386 don't have include guards, which causes them to fail since addition of LD_HWCAP_MASK to tunables. Add _DL_I386_PROCINFO_H guard to avoid redefining _dl_procinfo on multiple includes and also allow the subsequent include of another dl-procinfo.h to work. Verified with a build test on i686. * sysdeps/unix/sysv/linux/i386/dl-procinfo.h: Add include guard. * sysdeps/unix/sysv/linux/s390/dl-procinfo.h: Likewise.	9 years ago
Siddhesh Poyarekar	ea9b0ecbf0	tunables: Add LD_HWCAP_MASK to tunables Add LD_HWCAP_MASK to tunables in preparation of it being removed from rtld.c. This allows us to read LD_HWCAP_MASK much earlier so that it can influence IFUNC resolution in aarch64. This patch does not actually do anything other than read the LD_HWCAP_MASK variable and add the tunables way to set the LD_HWCAP_MASK, i.e. via the glibc.tune.hwcap_mask tunable. In a follow-up patch, the _dl_hwcap_mask will be replaced with glibc.tune.hwcap_mask to complete the transition. * elf/dl-tunables.list: Add glibc.tune.hwcap_mask. * scripts/gen-tunables.awk: Include dl-procinfo.h. * manual/tunables.texi: Document glibc.tune.hwcap_mask.	9 years ago
Siddhesh Poyarekar	44330b6d32	tunables: Clean up hooks to get and set tunables The TUNABLE_SET_VALUE and family of macros (and my later attempt to add a TUNABLE_GET) never quite went together very well because the overall interface was not clearly defined. This patch is an attempt to do just that. This patch consolidates the API to two simple sets of macros, TUNABLE_GET* and TUNABLE_SET. If TUNABLE_NAMESPACE is defined, TUNABLE_GET takes just the tunable name, type and a (optionally NULL) callback function to get the value of the tunable. The callback function, if non-NULL, is called if the tunable was externally set (i.e. via GLIBC_TUNABLES or any future mechanism). For example: val = TUNABLE_GET (check, int32_t, check_callback) returns the value of the glibc.malloc.check tunable (assuming TUNABLE_NAMESPACE is set to malloc) as an int32_t into VAL after calling check_callback. Likewise, TUNABLE_SET can be used to set the value of the tunable, although this is currently possible only in the dynamic linker before it relocates itself. For example: TUNABLE_SET (check, int32_t, 2) will set glibc.malloc.check to 2. Of course, this is not possible since we set (or read) glibc.malloc.check long after it is relocated. To access or set a tunable outside of TUNABLE_NAMESPACE, use the TUNABLE_GET_FULL and TUNABLE_SET_FULL macros, which have the following prototype: TUNABLE_GET_FULL (glibc, tune, hwcap_mask, uint64_t, NULL) TUNABLE_SET_FULL (glibc, tune, hwcap_mask, uint64_t, 0xffff) In future the tunable list may get split into mutable and immutable tunables where mutable tunables can be modified by the library and userspace after relocation as well and TUNABLE_SET will be more useful than it currently is. However whenever we actually do that split, we will have to ensure that the mutable tunables are protected with locks. elf/Versions (__tunable_set_val): Rename to __tunable_get_val. * elf/dl-tunables.c: Likewise. (do_tunable_update_val): New function. (__tunable_set_val): New function. (__tunable_get_val): Call CB only if the tunable was externally initialized. (tunables_strtoul): Replace strval with initialized. * elf/dl-tunables.h (strval): Replace with a bool initialized. (TUNABLE_ENUM_NAME, TUNABLE_ENUM_NAME1): Adjust names to prevent collision. (__tunable_set_val): New function. (TUNABLE_GET, TUNABLE_GET_FULL): New macros. (TUNABLE_SET, TUNABLE_SET_FULL): Likewise. (TUNABLE_SET_VAL): Remove. (TUNABLE_SET_VAL_WITH_CALLBACK): Likewise. * README.tunables: Document the new macros. * malloc/arena.c (ptmalloc_init): Adjust.	9 years ago
H.J. Lu	d4cc385c6e	x86-64: Move wcsnlen.S to multiarch/wcsnlen-sse4_1.S Since wcsnlen.S uses pminud which is the part of SSE4.1, move wcsnlen.S to multiarch/wcsnlen-sse4_1.S. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add wcsnlen-sse4_1 and wcsnlen-c. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Test __wcsnlen_sse4_1 and __wcsnlen_sse2. * sysdeps/x86_64/multiarch/ifunc-sse4_1.h: New file. * sysdeps/x86_64/multiarch/wcsnlen-c.c: Likewise. * sysdeps/x86_64/multiarch/wcsnlen-sse4_1.S: Likewise. * sysdeps/x86_64/multiarch/wcsnlen.c: Likewise. * sysdeps/x86_64/wcsnlen.S: Removed.	9 years ago
Stefan Liebler	4bf7abaeb3	S390: Use generic spinlock code. This patch removes the s390 specific implementation of spinlock code and is now using the generic one. ChangeLog: * sysdeps/s390/nptl/pthread_spin_init.c: Delete File. * sysdeps/s390/nptl/pthread_spin_lock.c: Likewise. * sysdeps/s390/nptl/pthread_spin_trylock.c: Likewise. * sysdeps/s390/nptl/pthread_spin_unlock.c: Likewise.	9 years ago
Stefan Liebler	12d2dd7060	Optimize generic spinlock code and use C11 like atomic macros. This patch optimizes the generic spinlock code. The type pthread_spinlock_t is a typedef to volatile int on all archs. Passing a volatile pointer to the atomic macros which are not mapped to the C11 atomic builtins can lead to extra stores and loads to stack if such a macro creates a temporary variable by using "__typeof ((mem)) tmp;". Thus, those macros which are used by spinlock code - atomic_exchange_acquire, atomic_load_relaxed, atomic_compare_exchange_weak - have to be adjusted. According to the comment from Szabolcs Nagy, the type of a cast expression is unqualified (see http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_423.htm): __typeof ((__typeof ((mem)) (mem)) tmp; Thus from spinlock perspective the variable tmp is of type int instead of type volatile int. This patch adjusts those macros in include/atomic.h. With this construct GCC >= 5 omits the extra stores and loads. The atomic macros are replaced by the C11 like atomic macros and thus the code is aligned to it. The pthread_spin_unlock implementation is now using release memory order instead of sequentially consistent memory order. The issue with passed volatile int pointers applies to the C11 like atomic macros as well as the ones used before. I've added a glibc_likely hint to the first atomic exchange in pthread_spin_lock in order to return immediately to the caller if the lock is free. Without the hint, there is an additional jump if the lock is free. I've added the atomic_spin_nop macro within the loop of plain reads. The plain reads are also realized by C11 like atomic_load_relaxed macro. The new define ATOMIC_EXCHANGE_USES_CAS determines if the first try to acquire the spinlock in pthread_spin_lock or pthread_spin_trylock is an exchange or a CAS. This is defined in atomic-machine.h for all architectures. The define SPIN_LOCK_READS_BETWEEN_CMPXCHG is now removed. There is no technical reason for throwing in a CAS every now and then, and so far we have no evidence that it can improve performance. If that would be the case, we have to adjust other spin-waiting loops elsewhere, too! Using a CAS loop without plain reads is not a good idea on many targets and wasn't used by one. Thus there is now no option to do so. Architectures are now using the generic spinlock automatically if they do not provide an own implementation. Thus the pthread_spin_lock.c files in sysdeps folder are deleted. ChangeLog: NEWS: Mention new spinlock implementation. * include/atomic.h: (__atomic_val_bysize): Cast type to omit volatile qualifier. (atomic_exchange_acq): Likewise. (atomic_load_relaxed): Likewise. (ATOMIC_EXCHANGE_USES_CAS): Check definition. * nptl/pthread_spin_init.c (pthread_spin_init): Use atomic_store_relaxed. * nptl/pthread_spin_lock.c (pthread_spin_lock): Use C11-like atomic macros. * nptl/pthread_spin_trylock.c (pthread_spin_trylock): Likewise. * nptl/pthread_spin_unlock.c (pthread_spin_unlock): Use atomic_store_release. * sysdeps/aarch64/nptl/pthread_spin_lock.c: Delete File. * sysdeps/arm/nptl/pthread_spin_lock.c: Likewise. * sysdeps/hppa/nptl/pthread_spin_lock.c: Likewise. * sysdeps/m68k/nptl/pthread_spin_lock.c: Likewise. * sysdeps/microblaze/nptl/pthread_spin_lock.c: Likewise. * sysdeps/mips/nptl/pthread_spin_lock.c: Likewise. * sysdeps/nios2/nptl/pthread_spin_lock.c: Likewise. * sysdeps/aarch64/atomic-machine.h (ATOMIC_EXCHANGE_USES_CAS): Define. * sysdeps/alpha/atomic-machine.h: Likewise. * sysdeps/arm/atomic-machine.h: Likewise. * sysdeps/i386/atomic-machine.h: Likewise. * sysdeps/ia64/atomic-machine.h: Likewise. * sysdeps/m68k/coldfire/atomic-machine.h: Likewise. * sysdeps/m68k/m680x0/m68020/atomic-machine.h: Likewise. * sysdeps/microblaze/atomic-machine.h: Likewise. * sysdeps/mips/atomic-machine.h: Likewise. * sysdeps/powerpc/powerpc32/atomic-machine.h: Likewise. * sysdeps/powerpc/powerpc64/atomic-machine.h: Likewise. * sysdeps/s390/atomic-machine.h: Likewise. * sysdeps/sparc/sparc32/atomic-machine.h: Likewise. * sysdeps/sparc/sparc32/sparcv9/atomic-machine.h: Likewise. * sysdeps/sparc/sparc64/atomic-machine.h: Likewise. * sysdeps/tile/tilegx/atomic-machine.h: Likewise. * sysdeps/tile/tilepro/atomic-machine.h: Likewise. * sysdeps/unix/sysv/linux/hppa/atomic-machine.h: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/atomic-machine.h: Likewise. * sysdeps/unix/sysv/linux/nios2/atomic-machine.h: Likewise. * sysdeps/unix/sysv/linux/sh/atomic-machine.h: Likewise. * sysdeps/x86_64/atomic-machine.h: Likewise.	9 years ago
H.J. Lu	48e7bc7a55	x86: Don't use dl_x86_cpu_features in cacheinfo.c Since cpu_features is available, use it instead of dl_x86_cpu_features. * sysdeps/x86/cacheinfo.c (intel_check_word): Accept cpu_features and use it instead of dl_x86_cpu_features. (handle_intel): Replace maxidx with cpu_features. Pass cpu_features to intel_check_word. (__cache_sysconf): Pass cpu_features to handle_intel. (init_cacheinfo): Likewise. Use cpu_features instead of dl_x86_cpu_features.	9 years ago
H.J. Lu	935971ba6b	x86-64: Optimize memcmp/wmemcmp with AVX2 and MOVBE Optimize x86-64 memcmp/wmemcmp with AVX2. It uses vector compare as much as possible. It is as fast as SSE4 memcmp for size <= 16 bytes and up to 2X faster for size > 16 bytes on Haswell and Skylake. Select AVX2 memcmp/wmemcmp on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. Key features: 1. For size from 2 to 7 bytes, load as big endian with movbe and bswap to avoid branches. 2. Use overlapping compare to avoid branch. 3. Use vector compare when size >= 4 bytes for memcmp or size >= 8 bytes for wmemcmp. 4. If size is 8 * VEC_SIZE or less, unroll the loop. 5. Compare 4 * VEC_SIZE at a time with the aligned first memory area. 6. Use 2 vector compares when size is 2 * VEC_SIZE or less. 7. Use 4 vector compares when size is 4 * VEC_SIZE or less. 8. Use 8 vector compares when size is 8 * VEC_SIZE or less. * sysdeps/x86/cpu-features.h (index_cpu_MOVBE): New. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add memcmp-avx2 and wmemcmp-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Test __memcmp_avx2 and __wmemcmp_avx2. * sysdeps/x86_64/multiarch/memcmp-avx2.S: New file. * sysdeps/x86_64/multiarch/wmemcmp-avx2.S: Likewise. * sysdeps/x86_64/multiarch/memcmp.S: Use __memcmp_avx2 on AVX 2 machines if AVX unaligned load is fast and vzeroupper is preferred. * sysdeps/x86_64/multiarch/wmemcmp.S: Use __wmemcmp_avx2 on AVX 2 machines if AVX unaligned load is fast and vzeroupper is preferred.	9 years ago

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