---
- branch: MAIN
  date: Tue Oct  8 18:02:46 UTC 2019
  files:
  - new: '1.367'
    old: '1.366'
    path: src/sys/kern/kern_sig.c
    pathrev: src/sys/kern/kern_sig.c@1.367
    type: modified
  id: 20191008T180246Z.58b269edcfc9cd7165976621d30189f247cea3d6
  log: |
    Enhance reliability of ptrace(2) in a debuggee with multiple LWPs

    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.
  module: src
  subject: 'CVS commit: src/sys/kern'
  unixtime: '1570557766'
  user: kamil