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2017-06-21Implement allocation buffers for internal useFlorian Weimer
This commit adds fixed-size allocation buffers. The primary use case is in NSS modules, where dynamically sized data is stored in a fixed-size buffer provided by the caller. Other uses include a replacement of mempcpy cascades (which is safer due to the size checking inherent to allocation buffers).
2017-06-02Add internal facility for dynamic array handlingFlorian Weimer
This is intended as a type-safe alternative to obstacks and hand-written realloc constructs. The implementation avoids writing function pointers to the heap.
2017-05-30Add reallocarray functionDennis Wölfing
The reallocarray function is an extension from OpenBSD. It is an integer-overflow-safe replacement for realloc(p, X*Y) and malloc(X*Y) (realloc(NULL, X*Y)). It can therefore help in preventing certain security issues in code. This is an updated version of a patch originally submitted by Rüdiger Sonderfeld in May 2014 [1]. Checked on i686-linux-gnu and x86_64-linux-gnu. [1] <https://sourceware.org/ml/libc-alpha/2014-05/msg00481.html>. 2017-05-30 Dennis Wölfing <denniswoelfing@gmx.de> Rüdiger Sonderfeld <ruediger@c-plusplus.de> * include/stdlib.h (__libc_reallocarray): New declaration. * malloc/Makefile (routines): Add reallocarray. (tests): Add tst-reallocarray.c. * malloc/Versions: Add reallocarray and __libc_reallocarray. * malloc/malloc-internal.h (check_mul_overflow_size_t): New inline function. * malloc/malloc.h (reallocarray): New declaration. * stdlib/stdlib.h (reallocarray): Likewise. * malloc/reallocarray.c: New file. * malloc/tst-reallocarray.c: New test file. * manual/memory.texi: Document reallocarray. * sysdeps/unix/sysv/linux/aarch64/libc.abilist: Add reallocarray. * sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/tilepro/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
2017-04-18malloc: Turn cfree into a compatibility symbolFlorian Weimer
2015-04-07Add struct scratch_buffer and its internal helper functionsFlorian Weimer
These will be used from NSS modules, so they have to be exported.
2012-01-01Implement aligned_allocUlrich Drepper
2009-04-09* malloc/malloc.c (malloc_info): New function.cvs/fedora-glibc-20090409T1422Ulrich Drepper
* malloc/malloc.h: Declare it. * malloc/Versions: Export malloc_info for GLIBC_2.10. * resolv/nss_dns/dns-host.c (getanswer_r): Use strcasecmp
2003-02-22* malloc/Versions (GLIBC_PRIVATE): Add __libc_thread_freeres.Roland McGrath
* malloc/thread-freeres.c: New file. * malloc/Makefile (aux): Add it. * sunrpc/Versions (GLIBC_PRIVATE): Removed. * sunrpc/rpc_thread.c (__rpc_thread_destroy): Put in special section "__libc_thread_freeres_fn" and add to __libc_thread_subfreeres set. * sysdeps/unix/sysv/linux/i386/geteuid.c (__geteuid): Typo fix. * sysdeps/unix/sysv/linux/i386/getgid.c (__getgid): Typo fix. 2003-02-21 Roland McGrath <roland@frob.com> * sysdeps/mach/hurd/opendir.c (__opendir): Use O_NONBLOCK in open. * iconvdata/Makefile (tests): Add bug-iconv3 only if [$(have-thread-library) = yes].
2002-12-062002-12-06 Roland McGrath <roland@redhat.com>Roland McGrath
* malloc/hooks.c [_LIBC && (USE___THREAD || (USE_TLS && !SHARED))] (malloc_starter, memalign_starter, free_starter): Don't define these. * malloc/malloc.c [_LIBC && (USE___THREAD || (USE_TLS && !SHARED))]: Don't declare them either. * malloc/arena.c (ptmalloc_init) [_LIBC && USE_TLS]: Don't call __pthread_initialize, so no need to set hooks to *_starter. (ptmalloc_init_minimal): New function, broken out of ptmalloc_init. [_LIBC && SHARED && USE_TLS && !USE___THREAD] (__libc_malloc_pthread_startup): New function. * malloc/Versions (libc: GLIBC_PRIVATE): New set, add that function.
2000-04-14Update.Ulrich Drepper
2000-04-14 Ulrich Drepper <drepper@redhat.com> * malloc/Versions [libc] (GLIBC_2.2): Add posix_memalign. * malloc/malloc.c: Implement posix_memalign for glibc. * include/stdlib.h: Add prototype for __posix_memalign. * stdlib/stdlib.h: Add prototype for posix_memalign.
2000-03-28Update.Ulrich Drepper
2000-03-28 Ulrich Drepper <drepper@redhat.com> * iconvdata/TESTS: Use UCS-2BE instead of UCS2. * iconv/loop.c: Define get16, get32, put16, and put32 macros to allow as well reading from/writing to unaligned addresses on machines which don't support this in hardware. Use FCTNAME macro to define function name. Include the file a second time for platforms which need special unaligned handling. * iconv/skeleton.c: Define get16u, get32u, put16u, and put32u macros to access potentially unaligned addresses. These macros are intended to be used only outside the loops. (unaligned): New definition. In case the machine can handle unaligned access define as zero. Otherwise as a variable which is initialized as nonzero in case the buffer passed in at runtime is unaligned with respect to the character set encoding involved. Call aligned or unaligned looop functions according to unaligned variable. * iconvdata/8bit-gap.c: Use get16, get32, put16, and put32 instead of direct casting pointer to potentially handle unaligned memory accesses. * iconvdata/8bit-generic.c: Likewise. * iconvdata/ansi_x3.110.c: Likewise. * iconvdata/big5.c: Likewise. * iconvdata/euc-cn.c: Likewise. * iconvdata/euc-jp.c: Likewise. * iconvdata/euc-kr.c: Likewise. * iconvdata/euc-tw.c: Likewise. * iconvdata/gbk.c: Likewise. * iconvdata/iso-2022-cn.c: Likewise. * iconvdata/iso-2022-jp.c: Likewise. * iconvdata/iso-2022-kr.c: Likewise. * iconvdata/iso646.c: Likewise. * iconvdata/iso_6937-2.c: Likewise. * iconvdata/iso_6937.c: Likewise. * iconvdata/johab.c: Likewise. * iconvdata/sjis.c: Likewise. * iconvdata/t.61.c: Likewise. * iconvdata/uhc.c: Likewise. * iconvdata/unicode.c: Likewise. * iconvdata/utf-16.c: Likewise. * locale/programs/simple-hash.c: Little optimizations. Remove K&R prototypes. * malloc/Versions [libc] (GLIBC_2.2): Add mcheck_check_all. * malloc/mcheck.c (mcheck_check_all): Renamed from check_all and made public. * malloc/mcheck.h (mcheck_check_all): Declare. * stdio-common/Makefile (tests): Add tst-obprintf.
2000-03-27Update.Ulrich Drepper
2000-03-26 Ulrich Drepper <drepper@redhat.com> * include/features.h: Undef and document __USE_XOPEN2K. * malloc/mcheck.c: Implement pedantic checking of all allocated blocks whenever a function is called. Initiated by calling mcheck_pedantic instead of mcheck. * malloc/mcheck.h: Declare mcheck_pedantic. * malloc/Versions [libc] (GLIBC_2.2): Add mcheck_pedantic. * locale/programs/localdef.c: Use mcheck_pedantic instead of mcheck for now.
2000-02-28Update.Ulrich Drepper
2000-02-25 Andreas Jaeger <aj@suse.de> * malloc/Versions: Change version of __libc_freeres to 2.1 in accordance with usage in glibc 2.1.3.
1999-12-19Update.Ulrich Drepper
1999-12-19 Andreas Jaeger <aj@suse.de> * sysdeps/generic/libc-start.c: Remove declaration of __libc_open. Move declaration of __libc_fcntl to ... * include/fcntl.h: ...here. * include/unistd.h: Move __libc_open and __libc_open64 to ... * include/fcntl.h: ...here. * malloc/malloc.h (__attribute_malloc__): Only define if hasn't happened yet. * malloc/Versions: __libc_freeres was exported with glibc 2.1.3, rename label.
1999-12-19Update.Ulrich Drepper
* malloc/Versions: Export __libc_freeres for GLIBC_2.1.
1998-07-02Update.Ulrich Drepper
1998-07-02 21:51 Ulrich Drepper <drepper@cygnus.com> * Makeconfig: Define list of subdirs as all-subdirs and make subdirs a copy. * Makefile: Add rules to generate map files. (distribute): Remove libc.map, add Versions.def and versions.awk. * Makerules: Change rules to find map files on common-objpfx. * elf/Makefile: Likewise. * md5-crypt/Makefile: Likewise. * nis/Makefile (libnsl-map): Remove. * Versions.def: New file. * versions.awk: New file. * argp/Versions: New file. * assert/Versions: New file. * catgets/Versions: New file. * csu/Versions: New file. * ctype/Versions: New file. * db/Versions: New file. * debug/Versions: New file. * dirent/Versions: New file. * elf/Versions: New file. * gmon/Versions: New file. * grp/Versions: New file. * hesiod/Versions: New file. * hurd/Versions: New file. * iconv/Versions: New file. * inet/Versions: New file. * intl/Versions: New file. * io/Versions: New file. * libio/Versions: New file. * linuxthreads/Versions: New file. * locale/Versions: New file. * login/Versions: New file. * malloc/Versions: New file. * math/Versions: New file. * md5-crypt/Versions: New file. * misc/Versions: New file. * nis/Versions: New file. * nss/Versions: New file. * posix/Versions: New file. * pwd/Versions: New file. * resolv/Versions: New file. * resource/Versions: New file. * rt/Versions: New file. * setjmp/Versions: New file. * shadow/Versions: New file. * signal/Versions: New file. * socket/Versions: New file. * stdio/Versions: New file. * stdio-common/Versions: New file. * stdlib/Versions: New file. * streams/Versions: New file. * string/Versions: New file. * sunrpc/Versions: New file. * sysdeps/alpha/Versions: New file. * sysdeps/alpha/fpu/Versions: New file. * sysdeps/i386/Versions: New file. * sysdeps/sparc/Versions: New file. * sysdeps/unix/sysv/Versions: New file. * sysdeps/unix/sysv/linux/Versions: New file. * sysdeps/unix/sysv/linux/alpha/Versions: New file. * sysdeps/unix/sysv/linux/i386/Versions: New file. * sysdeps/unix/sysv/linux/mips/Versions: New file. * sysvipc/Versions: New file. * termios/Versions: New file. * time/Versions: New file. * wcsmbs/Versions: New file. * wctype/Versions: New file. * libc.map: Removed. * db/libdb.map: Removed. * elf/libdl.map: Removed. * hesiod/libnss_hesiod.map: Removed. * hurd/libhurduser.map: Removed. * hurd/libmachuser.map: Removed. * linuxthreads/libpthread.map: Removed. * locale/libBrokenLocale.map: Removed. * login/libutil.map: Removed. * math/libm.map: Removed. * md5-crypt/libcrypt.map: Removed. * nis/libnsl.map: Removed. * nis/libnsl_compat.map: Removed. * nis/libnss_nis.map: Removed. * nis/libnss_nisplus.map: Removed. * nss/libnss_db.map: Removed. * nss/libnss_files.map: Removed. * resolv/libnss_dns.map: Removed. * resolv/libresolv.map: Removed. * rt/librt.map: Removed. * elf/dl-load.c (fillin_rpath): Fix test for trusted directory. Fix typos. * elf/rtld.c (process_dl_debug): Recognize 'all'. (process_envvars): LD_BIND_NOW must be followed by y, Y, or 1. * sysdeps/generic/elf/backtracesyms.c: Allocate string memory of correct size. * sysdeps/unix/sysv/linux/getsysstats.c (get_proc_path): Fix typo in comment.
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