Index: linux/signals_ia32.cpp =================================================================== --- linux/signals_ia32.cpp (revision 441159) +++ linux/signals_ia32.cpp (working copy) @@ -269,6 +269,7 @@ err = mprotect(stack_addr - stack_size + guard_page_size + guard_stack_size, guard_page_size, PROT_NONE); + assert(!err); stack_t sigalt; sigalt.ss_sp = stack_addr - stack_size + guard_page_size; @@ -276,6 +277,7 @@ sigalt.ss_size = guard_stack_size; err = sigaltstack (&sigalt, NULL); + assert(!err); } size_t get_available_stack_size() {