ptrace_trap_notify
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Name

ptrace_trap_notify — schedule trap to notify ptracer

Synopsis

void ptrace_trap_notify (struct task_struct * t);
 

Arguments

t

tracee wanting to notify tracer

Description

This function schedules sticky ptrace trap which is cleared on the next TRAP_STOP to notify ptracer of an event. t must have been seized by ptracer.

If t is running, STOP trap will be taken. If trapped for STOP and ptracer is listening for events, tracee is woken up so that it can re-trap for the new event. If trapped otherwise, STOP trap will be eventually taken without returning to userland after the existing traps are finished by PTRACE_CONT.

CONTEXT

Must be called with task->sighand->siglock held.

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