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glibc

The GNU C library.

Other Activity This Week

Add _FORTIFY_SOURCE support for inet_pton
Aaron Merey: Add function __inet_pton_chk which calls __chk_fail when the size of argument dst is too small.

support: Link links-dso-program-c with libgcc_s only if available
Florian Weimer: Add a configure check to detect bootstrapping builds that do not have libgcc_s.

elf: Use +nolink-deps to add make-only dependency for tst-origin
Florian Weimer: The tst-origin test must link against liborigin-mod.so.

debug: Improve '%n' fortify detection (BZ 30932)
Adhemerval Zanella: The 7bb8045ec0 path made the '%n' fortify check ignore EMFILE errors while trying to open /proc/self/maps, and this added a security issue where EMFILE can be attacker-controlled thus making it ineffective for some cases. The EMFILE failure is reinstated but with a different error message.

Add _FORTIFY_SOURCE support for inet_ntop
Frédéric Bérat: - Create the __inet_ntop_chk routine that verifies that the builtin size of the destination buffer is at least as big as the size given by the user.

Recent Activity

Add _FORTIFY_SOURCE support for inet_pton
Aaron Merey: Add function __inet_pton_chk which calls __chk_fail when the size of argument dst is too small.

support: Link links-dso-program-c with libgcc_s only if available
Florian Weimer: Add a configure check to detect bootstrapping builds that do not have libgcc_s.

elf: Use +nolink-deps to add make-only dependency for tst-origin
Florian Weimer: The tst-origin test must link against liborigin-mod.so.

debug: Improve '%n' fortify detection (BZ 30932)
Adhemerval Zanella: The 7bb8045ec0 path made the '%n' fortify check ignore EMFILE errors while trying to open /proc/self/maps, and this added a security issue where EMFILE can be attacker-controlled thus making it ineffective for some cases. The EMFILE failure is reinstated but with a different error message.

Add _FORTIFY_SOURCE support for inet_ntop
Frédéric Bérat: - Create the __inet_ntop_chk routine that verifies that the builtin size of the destination buffer is at least as big as the size given by the user.

add inputs giving large errors for rsqrt
Paul Zimmermann

Implement C23 powr
Joseph Myers: C23 adds various <math.h> function families originally defined in TS 18661-4.

x86_64: Add atanh with FMA
Sunil K Pandey: On SPR, it improves atanh bench performance by:

elf: Canonicalize $ORIGIN in an explicit ld.so invocation [BZ 25263]
Adhemerval Zanella: When an executable is invoked directly, we calculate $ORIGIN by calling readlink on /proc/self/exe, which the Linux kernel resolves to the target of any symlinks.

x86_64: Add sinh with FMA
Sunil K Pandey: On SPR, it improves sinh bench performance by:

glibc Release Tags

Increase version to 2.41.9000, add new section to NEWS
Andreas K. Hüttel: ### diff --git a/NEWS b/NEWS index b11422b060..e2e40e141c 100644 --- a/NEWS +++ b/NEWS @@ -5,6 +5,33 @@ See the end for copying conditions. Please send GNU C library bug reports via <

Create ChangeLog.old/ChangeLog.30
Andreas K. Hüttel

Increase version number to 2.40.9000
Andreas K. Hüttel

Add ChangeLog file
Andreas K. Hüttel

Open master branch for glibc 2.39 development
Andreas K. Hüttel

NEWS: Fix typos
Andreas K. Hüttel

Open master branch for glibc 2.38 development
Carlos O'Donell

Create ChangeLog.old/ChangeLog.26.
Carlos O'Donell

Remove left over LD_LIBRARY_VERSION usages
Adhemerval Zanella: The environment variable was removed by d2db60d8d830ef68c8d20a77ac3572d610aa40b1.

linux: Add process_mrelease
Adhemerval Zanella: Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. Checked on x86_64-linux-gnu.

Most Popular In The Past Month

Implement C23 powr
Joseph Myers: C23 adds various <math.h> function families originally defined in TS 18661-4.

x86_64: Add tanh with FMA
Sunil K Pandey: On Skylake, it improves tanh bench performance by:

x86_64: Add sinh with FMA
Sunil K Pandey: On SPR, it improves sinh bench performance by:

add inputs giving large errors for rsqrt
Paul Zimmermann

Add _FORTIFY_SOURCE support for inet_ntop
Frédéric Bérat: - Create the __inet_ntop_chk routine that verifies that the builtin size of the destination buffer is at least as big as the size given by the user.

nptl: PTHREAD_COND_INITIALIZER compatibility with pre-2.41 versions (bug 32786)
Florian Weimer: The new initializer and struct layout does not initialize the __g_signals field in the old struct layout before the change in commit c36fc50781995e6758cae2b6927839d0157f213c ("nptl: Remove g_refs from condition variables").

sysdeps: linux: Add BTRFS_SUPER_MAGIC to pathconf
Ronan Pigott: btrfs has a 65535 maximum link count.

LoongArch: Optimize f{max,min}imum{,f}
Xi Ruoyao: The code now looks like: fclass.s $fa2, $fa0 movfr2gr.s $t0, $fa2 slli.w $t0, $t0, 0x0 fclass.s $fa2, $fa1 movfr2gr.s $t1, $fa2 or $t0, $t0, $t1 andi $t0, $t0, 0x3 bnez $t0, 1f fmin.s $fa0, $fa0, $fa1 ret 1: fmul.s $fa0, $fa0, $fa1 ret This looks really bad, with expensive movfr2gr instructions, redundant sign-extensions and masking (arguably it's a compiler missed-optimzation), and a branch.

elf: Canonicalize $ORIGIN in an explicit ld.so invocation [BZ 25263]
Adhemerval Zanella: When an executable is invoked directly, we calculate $ORIGIN by calling readlink on /proc/self/exe, which the Linux kernel resolves to the target of any symlinks.

math: Refactor how to use libm-test-ulps
Adhemerval Zanella: The current approach tracks math maximum supported errors by explicitly setting them per function and architecture.

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