CVS commit: [netbsd-9] src/sys

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue Oct 15 19:11:02 UTC 2019

Modified Files:
        src/sys/kern [netbsd-9]: sys_ptrace_common.c
        src/sys/sys [netbsd-9]: ptrace.h

Log Message:
Pull up following revision(s) (requested by kamil in ticket #325):

        sys/sys/ptrace.h: revision 1.66
        sys/kern/sys_ptrace_common.c: revision 1.66

Introduce new ptrace(2) operation PT_STOP

It works like:
 - kill(SIGSTOP) for unstopped tracee
 - ptrace(PT_CONTINUE,SIGSTOP) for stopped tracee

The child will be stopped and always possible to be waited (with wait(2)
like calls).

For stopped traccee kill(SIGSTOP) has no effect. PT_CONTINUE+SIGSTOP cannot
be used on an unstopped process (EBUSY).

This operation is modeled after PT_KILL that is similar for the SIGKILL
call. While there, allow PT_KILL on unstopped traced child.
This operation is useful in an abnormal exit of a debugger from a signal
handler, usually followed by waitpid(2) and ptrace(PT_DETACH).


To generate a diff of this commit:
cvs rdiff -u -r1.58.2.7 -r1.58.2.8 src/sys/kern/sys_ptrace_common.c
cvs rdiff -u -r1.65 -r1.65.2.1 src/sys/sys/ptrace.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.