DCMD_PROC

Define an event to be delivered when the process associated with the file descriptor reaches a point of interest.

Use the DCMD_PROC_RUN command to set up the point of interest.

Note: The DCMD_PROC_EVENT command won't work unless you've set _DEBUG_RUN_ARM in the flags field of the procfs_run structure for the DCMD_PROC_RUN command.

Unlike DCMD_PROC_WAITSTOP , the DCMD_PROC_EVENT command doesn't block the calling process.

The argument is a pointer to the sigevent that you want to be delivered at the appropriate time. For example:

struct sigevent     event;

// Define a sigevent for process stopped notification.
event.sigev_notify = SIGEV_SIGNAL_THREAD;
event.sigev_signo = SIGUSR2;
event.sigev_code = 0;
event.sigev_value.sival_ptr = prp;
event.sigev_priority = -1;
devctl( fd, DCMD_PROC_EVENT, &event, sizeof(event), NULL);