https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61798
--- Comment #3 from Manuel Kessler <kessler at iag dot uni-stuttgart.de> --- Thank you both for trying to help. @Andrew: This is on x86_64, running kernel 3.1.0 on an (admittedly old) openSUSE 11.4. @Jakub: You are probably right, but the question remains, how a SIGPROF (probably from the profiling machinery added with -pg) can escape up to the user level instead of being catched by said machinery - and what to do against it, of course. Ciao, Manuel