http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59188
--- Comment #4 from Dmitry Vyukov <dvyukov at google dot com> --- > glibc (at least the 2.17 I have around) doesn't have sigsetjmp function at all this must be fine, we do not call it if it's not used > Not to mention that the arguments are wrong even for __sigsetjmp setjmp interception is a bit tricky (because one can't wrap libc setjmp into another function, otherwise the saved context will be broken) so it's actually called from tsan_rtl_amd64.S by a tail call here: // tail jump to libc sigsetjmp movl $0, %eax movq _ZN14__interception16real___sigsetjmpE@GOTPCREL(%rip), %rdx jmp *(%rdx) .cfi_endproc .size __sigsetjmp, .-__sigsetjmp
