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2016-11-04Fix alpha sqrt fegetenv namespace (bug 20768).Joseph Myers
On alpha, sqrt (a C90 function) brings in references to fegetenv (C99), resulting in linknamespace test failures: [initial] __sqrt -> [libm.a(w_sqrt.o)] __ieee754_sqrt -> [libm.a(e_sqrt.o)] __feholdexcept -> [libm.a(feholdexcpt.o)] fegetenv This patch fixes this by making __feholdexcept call __fegetenv instead of fegetenv. Tested for Alpha (compilation only). [BZ #20768] * sysdeps/alpha/fpu/feholdexcpt.c (__feholdexcept): Call __fegetenv instead of fegetenv.
2016-11-04Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139).Joseph Myers
manual/libm-err-tab.pl hardcodes a list of names for particular platforms (mapping from sysdeps directory name to friendly name for the manual). This goes against the principle of keeping information about individual platforms in their corresponding sysdeps directory, and the list is also very out-of-date regarding supported platforms and their corresponding sysdeps directories. This patch fixes this by adding a libm-test-ulps-name file alongside each libm-test-ulps file. The script then gets the friendly name from that file, which is required to exist, so it no longer needs to allow for the mapping being missing. Tested for x86_64. [BZ #14139] * manual/libm-err-tab.pl (%pplatforms): Initialize to empty. (find_files): Obtain platform name from libm-test-ulps-name and store in %pplatforms. (canonicalize_platform): Remove. (print_platforms): Use $pplatforms directly. (by_platforms): Do not allow for platforms missing from %pplatforms. * sysdeps/aarch64/libm-test-ulps-name: New file. * sysdeps/alpha/fpu/libm-test-ulps-name: Likewise. * sysdeps/arm/libm-test-ulps-name: Likewise. * sysdeps/generic/libm-test-ulps-name: Likewise. * sysdeps/hppa/fpu/libm-test-ulps-name: Likewise. * sysdeps/i386/fpu/libm-test-ulps-name: Likewise. * sysdeps/i386/i686/fpu/multiarch/libm-test-ulps-name: Likewise. * sysdeps/ia64/fpu/libm-test-ulps-name: Likewise. * sysdeps/m68k/coldfire/fpu/libm-test-ulps-name: Likewise. * sysdeps/m68k/m680x0/fpu/libm-test-ulps-name: Likewise. * sysdeps/microblaze/libm-test-ulps-name: Likewise. * sysdeps/mips/mips32/libm-test-ulps-name: Likewise. * sysdeps/mips/mips64/libm-test-ulps-name: Likewise. * sysdeps/nios2/libm-test-ulps-name: Likewise. * sysdeps/powerpc/fpu/libm-test-ulps-name: Likewise. * sysdeps/powerpc/nofpu/libm-test-ulps-name: Likewise. * sysdeps/s390/fpu/libm-test-ulps-name: Likewise. * sysdeps/sh/libm-test-ulps-name: Likewise. * sysdeps/sparc/fpu/libm-test-ulps-name: Likewise. * sysdeps/tile/libm-test-ulps-name: Likewise. * sysdeps/x86_64/fpu/libm-test-ulps-name: Likewise.
2016-11-04Make MIPS <sys/user.h> self-contained.Joseph Myers
The check-installed-headers tests show up that the MIPS <sys/user.h> is not self-contained, using size_t without including any header that defines it. This patch fixes it by including <stddef.h>, as done for other architectures' versions of this header. Tested for MIPS (all 24 ABIs, compilation only). * sysdeps/unix/sysv/linux/mips/sys/user.h: Include <stddef.h>.
2016-11-04XFAIL check-execstack for MIPS.Joseph Myers
This patch marks the check-execstack test as expected to fail for MIPS, with a comment referencing previous RFC discussion of the changes that would be needed to support non-executable stacks on MIPS. Tested for MIPS (all 24 ABIs). * sysdeps/unix/sysv/linux/mips/Makefile [$(subdir) = elf] (test-xfail-check-execstack): New variable.
2016-11-04Add localplt.data for MIPS.Joseph Myers
This patch adds a localplt.data file for MIPS, reflecting the peculiarities of MIPS ELF that mean this test cannot detect PLT entries (there aren't any in shared libraries), not GOT entries (because of the implicit relocation). Tested for MIPS (all 24 ABIs). * sysdeps/mips/localplt.data: New file.
2016-11-04Define wordsize.h macros everywhereSteve Ellcey
* bits/wordsize.h: Add documentation. * sysdeps/aarch64/bits/wordsize.h : New file * sysdeps/generic/stdint.h (PTRDIFF_MIN, PTRDIFF_MAX): Update definitions. (SIZE_MAX): Change ifdef to if in __WORDSIZE32_SIZE_ULONG check. * sysdeps/gnu/bits/utmp.h (__WORDSIZE_TIME64_COMPAT32): Check with #if instead of #ifdef. * sysdeps/gnu/bits/utmpx.h (__WORDSIZE_TIME64_COMPAT32): Ditto. * sysdeps/mips/bits/wordsize.h (__WORDSIZE32_SIZE_ULONG, __WORDSIZE32_PTRDIFF_LONG, __WORDSIZE_TIME64_COMPAT32): Add or change defines. * sysdeps/powerpc/powerpc32/bits/wordsize.h: Likewise. * sysdeps/powerpc/powerpc64/bits/wordsize.h: Likewise. * sysdeps/s390/s390-32/bits/wordsize.h: Likewise. * sysdeps/s390/s390-64/bits/wordsize.h: Likewise. * sysdeps/sparc/sparc32/bits/wordsize.h: Likewise. * sysdeps/sparc/sparc64/bits/wordsize.h: Likewise. * sysdeps/tile/tilegx/bits/wordsize.h: Likewise. * sysdeps/tile/tilepro/bits/wordsize.h: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/wordsize.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/wordsize.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/wordsize.h: Likewise. * sysdeps/wordsize-32/bits/wordsize.h: Likewise. * sysdeps/wordsize-64/bits/wordsize.h: Likewise. * sysdeps/x86/bits/wordsize.h: Likewise.
2016-11-04An optimized memchr was missing for AArch64. This version is similar toWilco Dijkstra
strchr and is significantly faster than the C version. 2016-11-04 Wilco Dijkstra <wdijkstr@arm.com> Kevin Petit <kevin.petit@arm.com> * sysdeps/aarch64/memchr.S (__memchr): New file.
2016-11-04Handle tilegx* machine names.Joseph Myers
This patch makes sysdeps/tile/preconfigure handle tilegx* machine names instead of just plain tilegx. That matches GCC, and in particular allows a big-endian toolchain to use the tilegxbe-linux-gnu name when configuring both GCC and glibc. Tested with compilation for tilegxbe-linux-gnu, both 32-bit and 64-bit (building a subsequent GCC against that glibc still falls over because of both 32-bit and 64-bit libraries going in the lib directory, as noted at <https://sourceware.org/ml/libc-alpha/2016-11/msg00129.html>). * sysdeps/tile/preconfigure: Accept tilegx* instead of tilegx.
2016-11-03Fix linknamespace parallel test failures.Joseph Myers
Having found that with my script to build many glibc variants I could reproduce the linknamespace test failures in parallel builds (that various people had previously reported but I hadn't seen myself), I investigated those failures further. This patch adds a missing dependency to those tests. Tested for x86_64, including the configuration where I saw those failures and where I don't see them with this patch. * conform/Makefile ($(linknamespace-header-tests)): Also depend on $(linknamespace-symlists-tests).
2016-11-02Fix -Wformat-length warning in time/tst-strptime2.cSteve Ellcey
* time/tst-strptime2.c: Ignore -Wformat-length warning.
2016-11-02Bug 20729: Fix build failures on ppc64 and other arches.Carlos O'Donell
The changes to fix bug 20729 introduced an error which removed an ignore diagnostic from -O2 by using the new -Os related macro. This broke ppc64 builds. This commit fixes the mistake. Tested on x86, x86_64, ppc64, ppc64le, arm, aarch64, and s390x.
2016-11-01Fix warning from latest GCC in tst-printf.cSteve Ellcey
* stdio-common/tst-printf.c: Ignore -Wformat-length warning.
2016-11-01Correct clog10 documentation (bug 19673).Joseph Myers
Bug 19673 reports that the documentation of clog10 is incorrect, both failing to include the division by log (10) in the imaginary part and, in the non-TeX version of the equation only, describing the LHS as log rather than log10. This patch fixes both issues. Note: I think it's appropriate that the LHS says log10 not clog10, and that the cexp and clog descriptions referred to in a comment in that bug report similarly say exp and log; this is a mathematical description not a literal C one. Tested for x86_64. [BZ #19673] * manual/math.texi (Exponents and Logarithms): Correct description of clog10.
2016-10-31Bug 20729: Include libc-internal.h where required.Carlos O'Donell
The original fix for bug 20729 failed to include libc-internal.h in the files that needed them and this caused build failures on machines that don't implicitly include this header. This commit fixes that by following the consensus rule that a header, if needed, should always be directly included.
2016-10-31hurd: Fix spurious port deallocationBrent W. Baccala
* sysdeps/mach/hurd/dl-sysdep.c (__mmap): Do not deallocate memobj_wr when it is MACH_PORT_NULL.
2016-10-31Properly initialize glob structure with GLOB_BRACE|GLOB_DOOFFS (bug 20707)Andreas Schwab
2016-10-29Bug 20729: Fix building with -Os.Carlos O'Donell
This commit adds a new DIAG_IGNORE_Os_NEEDS_COMMENT which is only enabled when compiling with -Os. This allows developers working on -Os enabled builds to mark false-positive warnings without impacting the warnings emitted at -O2. Then using the new DIAG_IGNORE_Os_NEEDS_COMMENT we fix 6 warnings generated with GCC 5 to get -Os builds working again.
2016-10-28Add include/crypt.h.Carlos O'Donell
To support tests that include crypt.h we add a wrapper.
2016-10-28Fix warning caused by unused-result in bug-atexit3-lib.ccGabriel F T Gomes
The test case dlfcn/bug-atexit3-lib.cc calls write and doesn't check the result. When building with GCC 6.2, this generates a warning in 'make check', which is treated as an error. This patch replaces the call to write with a call to write_message. Tested for powerpc64le.
2016-10-28Add SNAN, SNANF, SNANL macros.Joseph Myers
TS 18661-1 defines SNAN macros for signaling NaN values, suitable for use in static initializers. This patch adds them to glibc's <math.h> (provided you are building with GCC 3.3 or later; no attempt is made to provide any kind of nonconforming fallback for older compilers without the __builtin_nans functions). Tested for x86_64 and x86. * math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNANF): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNAN): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNANL): Likewise. * manual/arith.texi (Infinity and NaN): Document SNANF, SNAN and SNANL. * math/test-double.h (snan_value_MACRO): New macro. * math/test-float.h (snan_value_MACRO): Likewise. * math/test-ldouble.h (snan_value_MACRO): Likewise. * math/libm-test.inc (issignaling_test_data): Add tests of snan_value_MACRO.
2016-10-28Document a behavior of an elided pthread_rwlock_unlockTulio Magno Quites Machado Filho
Explain that pthread_rwlock_unlock may crash if called on a lock not held by the current thread.
2016-10-28powerpc: Fix TOC stub on powerpc64 clone()Tulio Magno Quites Machado Filho
Use a function call to _exit() so that the linker can create a TOC stub instead of just a branch. Tested on powerpc64.
2016-10-28malloc: Update comments about chunk layoutFlorian Weimer
2016-10-28crypt: Use internal names for the SHA-2 block functionsFlorian Weimer
These functions are externally visible with a static libcrypt library.
2016-10-28Fix building tst-linkall-static.Carlos O'Donell
The crypt/ directory is not added as part of the sysdep directories. Add it when building tst-linkall-static to include crypt.h.
2016-10-28Add missing include for stdlib.h.Carlos O'Donell
The test math/test-nan-overflow uses malloc without including stdlib.h. On -Os builds for i486 the header inclusion order is altered enough that the test fails to build because of the warning which is turned into an error. The obvious fix is to include stdlib.h since malloc is being used directly.
2016-10-28Check IFUNC definition in unrelocated shared library [BZ #20019]H.J. Lu
Calling an IFUNC function defined in unrelocated shared library may lead to segfault. This patch issues an error message to request relinking the shared library if it references IFUNC function defined in the unrelocated shared library. [BZ #20019] * sysdeps/i386/dl-machine.h (elf_machine_rel): Check IFUNC definition in unrelocated shared library. * sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
2016-10-28i386: Support CFLAGS which imply -fno-omit-frame-pointer [BZ #20729]Florian Weimer
2016-10-28Add test for linking against most static librariesFlorian Weimer
2016-10-28sysmalloc: Initialize previous size field of mmaped chunksFlorian Weimer
With different encodings of the header, the previous zero initialization may be insufficient and produce an invalid encoding.
2016-10-28malloc: Use accessors for chunk metadata accessFlorian Weimer
This change allows us to change the encoding of these struct members in a centralized fashion.
2016-10-28Make strtod raise "inexact" exceptions (bug 19380).Joseph Myers
The strtod function should raise the "inexact" exception when its result is inexact, but fails to do so except in the case of underflow or overflow. This patch fixes it to do so for all inexact results. tst-strtod-round is extended to test for this exception; the generator is fixed to properly mark inexact results as such in the case where the inexactness is from the mpfr_subnormalize step. Tested for x86_64, x86 and powerpc. [BZ #19380] * stdlib/strtod_l.c (round_and_return): Force "inexact" exception for inexact results. * stdlib/gen-tst-strtod-round.c (string_to_fp): Return indication of inexact result where mpfr_subnormalize is the only inexact step. * stdlib/tst-strtod-round-data.h: Regenerated. * stdlib/tst-strtod-round-skeleton.c [!FE_INEXACT] (FE_INEXACT): Define to 0. (GEN_ONE_TEST): Test inexact exceptions raised are as expected.
2016-10-27Fix a sparc header conformtest failure.David S. Miller
* sysdeps/unix/sysv/linux/sparc/sys/user.h: Include stddef.h
2016-10-27Static inline functions for mallopt helpersSiddhesh Poyarekar
Make mallopt helper functions for each mallopt parameter so that it can be called consistently in other areas, like setting tunables. * malloc/malloc.c (do_set_mallopt_check): New function. (do_set_mmap_threshold): Likewise. (do_set_mmaps_max): Likewise. (do_set_top_pad): Likewise. (do_set_perturb_byte): Likewise. (do_set_trim_threshold): Likewise. (do_set_arena_max): Likewise. (do_set_arena_test): Likewise. (__libc_mallopt): Use them.
2016-10-26Add canonicalize, canonicalizef, canonicalizel.Joseph Myers
TS 18661-1 defines canonicalize functions to produce a canonical version of a floating-point representation. This patch implements these functions for glibc. As with the iscanonical macro, these functions are oriented to the decimal floating-point case, where some values have both canonical and noncanonical representations. However, the functions have a return value that says whether they succeeded in storing a canonical result; thus, they can fail for the case of an invalid representation (while still not making any particular choice from among multiple equally canonical valid representations of the same value). Since no floating-point formats in glibc actually have noncanonical valid representations, a type-generic implementation of these functions can be used that expects iscanonical to return 0 only for invalid representations. Now that iscanonical is used within libm.so, libm_hidden_proto / libm_hidden_def are added for __iscanonicall. The definition of these functions is intended to correspond to a convertFormat operation to the same floating-point format. Thus, they convert signaling NaNs to quiet NaNs, raising the "invalid" exception. Such a conversion "should" produce "the canonical version of that signaling NaN made quiet". libm-test.inc is made to check NaN payloads for the output of these functions, a new feature (at some point manipulation functions such as fabs and copysign should have tests added that verify payload preservation for them). As however some architectures may not follow the recommended practice of preserving NaN payloads when converting a signaling NaN to quiet, a new math-tests.h macro SNAN_TESTS_PRESERVE_PAYLOAD is added, and defined to 0 for non-NAN2008 MIPS; any other architectures seeing test failures for lack of payload preservation in this case should also define this macro to 0. (If any cases arise where the sign isn't preserved either, those should have a similar macro added.) The ldbl-96 and ldbl-128ibm tests of iscanonical are renamed and adapted to test canonicalizel as well on the same representations. Tested for x86_64, x86, mips64 and powerpc. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (canonicalize): New declaration. * math/Versions (canonicalize): New libm symbol at version GLIBC_2.25. (canonicalizef): Likewise. (canonicalizel): Likewise. * math/Makefile (gen-libm-calls): Add s_canonicalizeF. * math/s_canonicalize_template.c: New file. * math/libm-test.inc: Update comment on functions tested and testing of NaN payloads. (TEST_NAN_PAYLOAD): New macro. (NO_TEST_INLINE): Update value. (XFAIL_TEST): Likewise. (ERRNO_UNCHANGED): Likewise. (ERRNO_EDOM): Likewise. (ERRNO_ERANGE): Likewise. (IGNORE_RESULT): Likewise. (NON_FINITE): Likewise. (TEST_SNAN): Likewise. (NO_TEST_MATHVEC): Likewise. (TEST_NAN_PAYLOAD_CANONICALIZE): New macro. (check_float_internal): Check NaN payloads if TEST_NAN_PAYLOAD. (struct test_Ffp_b1_data): New type. (RUN_TEST_Ffp_b1): New macro. (RUN_TEST_LOOP_Ffp_b1): Likewise. (canonicalize_test_data): New array. (canonicalize_test): New function. (main): Call canonicalize_test. * manual/arith.texi (FP Bit Twiddling): Document canonicalize, canonicalizef and canonicalizel. * manual/libm-err-tab.pl: Update comment on interfaces without ulps tabulated. * sysdeps/ieee754/ldbl-opt/nldbl-canonicalize.c: New file. * sysdeps/ieee754/ldbl-opt/s_canonicalizel.c: Likewise. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add canonicalize. (CFLAGS-nldbl-canonicalize.c): New variable. * sysdeps/ieee754/ldbl-128ibm/test-iscanonical-ldbl-128ibm.c: Move to ... * sysdeps/ieee754/ldbl-128ibm/test-canonical-ldbl-128ibm.c: ... here. (do_test): Also test canonicalizel. * sysdeps/ieee754/ldbl-128ibm/Makefile (tests): Change test-iscanonical-ldbl-128ibm to test-canonical-ldbl-128ibm. * sysdeps/ieee754/ldbl-128ibm/include/bits/iscanonical.h: New file. * sysdeps/ieee754/ldbl-128ibm/s_iscanonicall.c (__iscanonicall): Use libm_hidden_def. * sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c: Move to ... * sysdeps/ieee754/ldbl-96/test-canonical-ldbl-96.c: ... here. (do_test): Also test canonicalizel. * sysdeps/ieee754/ldbl-96/Makefile (tests): Change test-iscanonical-ldbl-96 to test-canonical-ldbl-96. * sysdeps/ieee754/ldbl-96/include/bits/iscanonical.h: New file. * sysdeps/ieee754/ldbl-96/s_iscanonicall.c (__iscanonicall): Use libm_hidden_def. * sysdeps/generic/math-tests.h (SNAN_TESTS_PRESERVE_PAYLOAD): New macro. * sysdeps/mips/math-tests.h [__mips_hard_float && !__mips_nan2008] (SNAN_TESTS_PRESERVE_PAYLOAD): Likewise. * sysdeps/nacl/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-26Add getpayloadl to libnldbl.Joseph Myers
This patch adds getpayloadl to libnldbl, missed in my patch that originally implemented getpayload functions. Tested for powerpc. * sysdeps/ieee754/ldbl-opt/nldbl-getpayload.c: New file. * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add getpayload. (CFLAGS-nldbl-getpayload.c): New variable.
2016-10-26Use read_int in vfscanfGabriel F. T. Gomes
The function read_int, from printf-parse.h, parses an integer from a string while avoiding overflows. It is used by other functions, such as vfprintf, to avoid undefined behavior. The function vfscanf (_IO_vfwscanf) parses an integer from the format string, and can use read_int.
2016-10-26malloc: Remove malloc_get_state, malloc_set_state [BZ #19473]Florian Weimer
After the removal of __malloc_initialize_hook, newly compiled Emacs binaries are no longer able to use these interfaces. malloc_get_state is only used during the Emacs build process, so we provide a stub implementation only. Existing Emacs binaries will not call this stub function, but still reference the symbol. The rewritten tst-mallocstate test constructs a dumped heap which should approximates what existing Emacs binaries pass to glibc malloc.
2016-10-26iconv: Avoid writable data and relocations in ISO646Florian Weimer
2016-10-26iconv: Avoid writable data and relocations in IBM charsetsFlorian Weimer
The IBM930, IBM933, IBM935 and IBM939 converters defined lookup tables which were not constant. They also contained an unnecessary pointer indirection.
2016-10-26Remove redundant definitions of M_ARENA_* macrosSiddhesh Poyarekar
The M_ARENA_MAX and M_ARENA_TEST macros are defined in malloc.c as well as malloc.h, and the former is unnecessary. This patch removes the duplicate. Tested on x86_64 to verify that the generated code remains unchanged barring changed line numbers to __malloc_assert. * malloc/malloc.c (M_ARENA_TEST, M_ARENA_MAX): Remove.
2016-10-26Remove references to sbrk to grow/shrink arenasSiddhesh Poyarekar
The manual incorrectly references sbrk as the method used to grow and shrink heaps and the fact that M_TRIM_THRESHOLD and M_TOP_PAD control that behavior. In reality, a heap may be grown or shrunk through multiple methods depending on whether it is the main arena (in which case sbrk is correct) or not (in which case, there are a number of strategies including allocating an additional heap to grow an arena and/or 'mprotect' a region to make it available for allocation). Remove references to sbrk so that it covers the behavior more accurately. * manual/memory.texi (M_TOP_PAD): Remove reference to sbrk. (M_TRIM_THRESHOLD): Likewise.
2016-10-26Document the M_ARENA_* mallopt parametersSiddhesh Poyarekar
The M_ARENA_* mallopt parameters are in wide use in production to control the number of arenas that a long lived process creates and hence there is no point in stating that this interface is non-public. Document this interface and remove the obsolete comment. * manual/memory.texi (M_ARENA_TEST): Add documentation. (M_ARENA_MAX): Likewise. * malloc/malloc.c: Remove obsolete comment.
2016-10-26Add note on MALLOC_MMAP_* environment variablesSiddhesh Poyarekar
The mallopt parameters manual does not mention the environment variables that can be used to set these parameters at program startup. Mention those environment variables for completeness. * manual/memory.texi: Add environment variable alternatives to setting mallopt parameters.
2016-10-26Fix atomic_fetch_xor_release.Carlos O'Donell
No code uses atomic_fetch_xor_release except for the upcoming conditional variable rewrite. Therefore there is no user visible bug here. The use of atomic_compare_and_exchange_bool_rel is removed (since it doesn't exist anymore), and is replaced by atomic_compare_exchange_weak_release. We use weak_release because it provides better performance in the loop (the weak semantic) and because the xor is release MO (the release semantic). We don't reload expected in the loop because atomic_compare_and_exchange_weak_release does this for us as part of the CAS failure. It is otherwise a fairly plain conversion that fixes building the new condvar for 32-bit x86. Passes all regression tests for x86.
2016-10-25Add tests for strfrom functionsRajalakshmi Srinivasaraghavan
2016-10-25Refactor strtod testsRajalakshmi Srinivasaraghavan
This patch changes strtod* tests to use strfrom* functions.
2016-10-25Add strfromd, strfromf, and strfroml functionsGabriel F. T. Gomes
ISO/IEC TS 18661-1 adds several functions in the strfrom family to stdlib. This patch adds strfromd, strfromf, and strfroml. This is being done in preparation for the new floating-point type, float128. The added functions convert a floating-point value into a string, with configurable format.
2016-10-25Fix cmpli usage in power6 memset.Joseph Myers
Building glibc for powerpc64 with recent (2.27.51.20161012) binutils, with multi-arch enabled, I get the error: ../sysdeps/powerpc/powerpc64/power6/memset.S: Assembler messages: ../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: operand out of range (5 is not between 0 and 1) ../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: operand out of range (128 is not between 0 and 31) ../sysdeps/powerpc/powerpc64/power6/memset.S:254: Error: missing operand Indeed, cmpli is documented as a four-operand instruction, and looking at nearby code it seems likely cmpldi was intended. This patch fixes this powerpc64 code accordingly, and makes a corresponding change to the powerpc32 code. Tested for powerpc, powerpc64 and powerpc64le by Tulio Magno Quites Machado Filho * sysdeps/powerpc/powerpc32/power6/memset.S (memset): Use cmplwi instead of cmpli. * sysdeps/powerpc/powerpc64/power6/memset.S (memset): Use cmpldi instead of cmpli.
2016-10-24 * sysdeps/unix/sysv/linux/fxstat.c: Remove useless cast.Yury Norov
* sysdeps/unix/sysv/linux/lxstat.c: Likewise. * sysdeps/unix/sysv/linux/xstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/fxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/xstat.c: Likewise.
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