https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100114
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:3d0135bf3be416bbe2531dc763d19b749eb2b856 commit r9-9450-g3d0135bf3be416bbe2531dc763d19b749eb2b856 Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Apr 17 11:27:14 2021 +0200 sanitizer: Fix asan against glibc 2.34 [PR100114] As mentioned in the PR, SIGSTKSZ is no longer a compile time constant in glibc 2.34 and later, so static const uptr kAltStackSize = SIGSTKSZ * 4; needs dynamic initialization, but is used by a function called indirectly from .preinit_array and therefore before the variable is constructed. This results in using 0 size instead and all asan instrumented programs die with: ==91==ERROR: AddressSanitizer failed to allocate 0x0 (0) bytes of SetAlternateSignalStack (error code: 22) Here is a cherry-pick from upstream to fix this. 2021-04-17 Jakub Jelinek <ja...@redhat.com> PR sanitizer/100114 * sanitizer_common/sanitizer_posix_libcdep.cc: Cherry-pick llvm-project revisions 82150606fb11d28813ae6da1101f5bda638165fe and b93629dd335ffee2fc4b9b619bf86c3f9e6b0023. (cherry picked from commit 950bac27d63c1c2ac3a6ed867692d6a13f21feb3)
