Performance monitoring

syscalls_perfStart (syscalls_perf_start)

GETFROMSTACK(ustack, unsigned, pid, 0);

Starts performance monitoring for process given by pid.

syscalls_perfRead (syscalls_perf_read)

GETFROMSTACK(ustack, void *, buffer, 0);
GETFROMSTACK(ustack, size_t, sz, 1);

Reads gathered performance monitoring events.

syscalls_perfFinish (syscalls_perf_finish)

Finishes performance monitoring.