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).
so use u_long and ulmin() instead of u_int and uimin(). Found by lgtm bot.
XXX TCP's sequence number is uint32_t, so it might be good to change some
entries in struct tcpcb to uint32_t instead of u_long. FreeBSD did it.
- Remove interrupt support, do polling only, avoids unnecessary trouble.
- Simplify a few things.
- Fix the suspend function, the SaveState command is 0x98, not 0x9C.
- Make the driver MP-safe.
- Sync the man page with reality.
Stop competing between threads which one emits event signal quicker and
overwriting the signal from another thread.
This fixes missed in action signals.
NetBSD truss can now report reliably all TRAP_SCE/SCX/etc events without
reports of missed ones.
his was one of the reasons why debuggee with multiple threads misbehaved
under a debugger.
This change is v.2 of the previously reverted commit for the same fix.
This version contains recovery path that stopps triggering event SIGTRAP
for a detached debugger.
Missed in previous. Of these - only ttyerrio() is used, the rest are
just courtesy "for those defining their own line disciplines". So may
be we should bring back ttyerrinput() too.
friendly methods for sys/conf.h that needs it.
one alias per return type and first function are are needed,
though they can be stubbed to existing code. the only cost is
the symbol itself, the codegen it the same.
