[PATCH v2 0/9] Some fixes for handling vfork by multi-threaded programs

Simon Marchi simon.marchi@polymtl.ca
Tue Jan 18 04:09:28 GMT 2022


This is v2 of:

    https://sourceware.org/pipermail/gdb-patches/2022-January/185204.html

The two changes are:

 - New patch 8: patch 7 fixes a bug gdbserver-side, which is good, but
   it then uncovers a small bug in gdb.  Patch 8 fixes it.

 - Patch 8/8 in v1 (now 9/9) had a bug that broke some tests that detach
   the fork parent.

Simon Marchi (9):
  gdb/infrun: add reason parameter to stop_all_threads
  gdb/linux-nat: remove check based on current_inferior in
    linux_handle_extended_wait
  gdb: replace inferior::waiting_for_vfork_done with
    inferior::thread_waiting_for_vfork_done
  gdb/infrun: add inferior parameters to stop_all_threads and
    restart_threads
  gdb/infrun: add logging statement to do_target_resume
  gdb: fix handling of vfork by multi-threaded program
    (follow-fork-mode=parent, detach-on-fork=on)
  gdbserver: report correct status in thread stop race condition
  gdb/remote: remove_new_fork_children don't access
    target_waitstatus::child_ptid if kind ==
    TARGET_WAITKIND_THREAD_EXITED
  gdb: resume ongoing step after handling fork or vfork

 gdb/infcmd.c                                  |   2 +-
 gdb/inferior.h                                |   8 +-
 gdb/infrun.c                                  | 212 ++++++++++++++++--
 gdb/infrun.h                                  |  14 +-
 gdb/linux-nat.c                               |  17 +-
 gdb/remote.c                                  |   7 +-
 .../gdb.threads/next-fork-other-thread.c      |  86 +++++++
 .../gdb.threads/next-fork-other-thread.exp    | 116 ++++++++++
 .../gdb.threads/vfork-multi-inferior-sleep.c  |  25 +++
 .../gdb.threads/vfork-multi-inferior.c        |  55 +++++
 .../gdb.threads/vfork-multi-inferior.exp      | 115 ++++++++++
 .../gdb.threads/vfork-multi-thread.c          |  74 ++++++
 .../gdb.threads/vfork-multi-thread.exp        |  96 ++++++++
 gdbserver/linux-low.cc                        |  60 +++--
 14 files changed, 806 insertions(+), 81 deletions(-)
 create mode 100644 gdb/testsuite/gdb.threads/next-fork-other-thread.c
 create mode 100644 gdb/testsuite/gdb.threads/next-fork-other-thread.exp
 create mode 100644 gdb/testsuite/gdb.threads/vfork-multi-inferior-sleep.c
 create mode 100644 gdb/testsuite/gdb.threads/vfork-multi-inferior.c
 create mode 100644 gdb/testsuite/gdb.threads/vfork-multi-inferior.exp
 create mode 100644 gdb/testsuite/gdb.threads/vfork-multi-thread.c
 create mode 100644 gdb/testsuite/gdb.threads/vfork-multi-thread.exp


base-commit: e2c0149e8b0ce12accb8f4b02cbbeff3e91e4737
-- 
2.34.1



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