At present, to set syscall tracing, the Task requires that the traceSyscall boolean be set to true. When a task is continued via sendContinue (), a check is made to see if the traceSyscall boolean is set true and if yes, instead of using PTRACE_CONT, PTRACE_SYSCALL is used. The problem is that in addition to this, the PTRACE options require changing. The PTRACE_O_TRACESYSGOOD option must be set prior to running with PTRACE_SYSCALL. Without setting the option, the low-level wait logic can't determine a syscall event has occurred and treats the event as a regular trap. Currently, the options only get set in Task states: attached and startRunning. If a frysk-user tries to set the syscall trace after a stop occurs, a signal for example, the options do not get set before continuing and frysk treatst the syscall event as a trap. A suggested method might be to register option changes and check when continuing whether PTRACE_SETOPTIONS must be performed.