IDA Help: Step Tracing Options

// Get step current tracing options
// Returns combination of ST_... constants

long get_step_trace_options();

// Set step current tracing options.
//      options - combination of ST_... constants

void set_step_trace_options(long options);

#define ST_OVER_DEBUG_SEG 0x01 // step tracing will be disabled when IP is in a debugger segment
#define ST_OVER_LIB_FUNC  0x02 // step tracing will be disabled when IP is in a library function
#define ST_ALREADY_LOGGED 0x04 // step tracing will be disabled when IP is already logged
#define ST_SKIP_LOOPS     0x08 // step tracing will try to skip loops already recorded
#define ST_DIFFERENTIAL   0x10 // tracing: log only new instructions