[PATCH 00/11] Linux: Fix issues around thread group leader exits

[Pedro Alves <pedro@palves.net>]

This series addresses some problems around thread group leader exits
on GNU/Linux (native and gdbserver):

 - addresses a race in zombie leader detection
 - make sure only the leader's exit status is interpreted as whole-process exit status
 - make sure the whole-process exit is always the last event reported

Tested on GNU/Linux x86-64, native and extended-remote gdbserver.  New
testcase added at the end of the series.

Lancelot SIX (2):
  Ensure EXIT is last event, gdb/linux
  Process exit status is leader exit status testcase

Pedro Alves (9):
  Fix gdbserver/linux target_waitstatus logging assert
  Fix gdb.threads/clone-new-thread-event.exp race
  Fix gdb.threads/current-lwp-dead.exp race
  gdb: Reorganize linux_nat_filter_event
  gdbserver: Reorganize linux_process_target::filter_event
  gdbserver: Reindent check_zombie_leaders
  Re-add zombie leader on exit, gdb/linux
  Re-add zombie leader on exit, gdbserver/linux
  Ensure EXIT is last event, gdbserver/linux

 gdb/linux-nat.c                               | 226 ++++++++++----
 .../gdb.threads/clone-new-thread-event.c      |  16 +-
 .../gdb.threads/clone-new-thread-event.exp    |   2 +
 gdb/testsuite/gdb.threads/current-lwp-dead.c  | 101 ++++---
 .../gdb.threads/current-lwp-dead.exp          |  23 +-
 ...rocess-exit-status-is-leader-exit-status.c |  64 ++++
 ...cess-exit-status-is-leader-exit-status.exp |  45 +++
 gdbserver/linux-low.cc                        | 281 +++++++++++-------
 gdbserver/linux-low.h                         |  15 +-
 9 files changed, 563 insertions(+), 210 deletions(-)
 create mode 100644 gdb/testsuite/gdb.threads/process-exit-status-is-leader-exit-status.c
 create mode 100644 gdb/testsuite/gdb.threads/process-exit-status-is-leader-exit-status.exp


base-commit: c2b167b3d601dd20de0640e2fbd46835599a1537
-- 
2.26.2