Launchpad has imported 1 comments from the remote bug at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114533.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2024-03-30T12:48:10+00:00 Doko-v wrote: reported at https://gcc.gnu.org/pipermail/gcc-patches/2024-March/647635.html On x86, this compiles into movdqa which segfaults on unaligned access. This kind of failure has been seen when running against glibc 2.39, which incidentally changed the printf implementation to move away from alloca() for this data to instead append it at the end of an existing "scratch buffer", with arbitrary alignment, whereas alloca() was probably more likely to be naturally aligned. Tested by adding the patch to the Ubuntu gcc-14 package in https://launchpad.net/~schopin/+archive/ubuntu/libquadmath Signed-off-by: Simon Chopin <simon.cho...@canonical.com> --- libquadmath/printf/printf_fp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libquadmath/printf/printf_fp.c b/libquadmath/printf/printf_fp.c index 8effcee88fa..d86aa650d38 100644 --- a/libquadmath/printf/printf_fp.c +++ b/libquadmath/printf/printf_fp.c @@ -363,7 +363,7 @@ __quadmath_printf_fp (struct __quadmath_printf_file *fp, /* Fetch the argument value. */ { - fpnum = **(const __float128 **) args[0]; + memcpy(&fpnum, *(void* const *) args[0], sizeof(fpnum)); /* Check for special values: not a number or infinity. */ if (isnanq (fpnum)) Reply at: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/2052929/comments/4 ** Changed in: gcc Status: Unknown => New ** Changed in: gcc Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2052929 Title: failed autopkgtests for evolver vs glibc 2.39 on amd64 To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/2052929/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
