[PATCH v3 0/5] Reduce back and forth with target when threads have pending statuses + better handling of 'S' packets

[Simon Marchi via Gdb-patches <gdb-patches@sourceware.org>]

This series is made of two set of changes.  The first 4 patches are the
new version of this series:

  https://sourceware.org/pipermail/gdb-patches/2020-December/174271.html

The rationale remains the same.

The main change is in patch 1.  Previously, the remote target was only
tracking the resume state in non-stop, now it does it even in all-stop.
This was changed because it is useful for patch 5, which is the new
version of this patch:

  https://sourceware.org/pipermail/gdb-patches/2020-December/174277.html

I included patch 5 in this series because it uses the infrastructure
added by patch 1.

I also think that making the remote target track the resume state in all
modes, as opposed to just in non-stop mode, is less confusing in the
long run.

Since patches 3 and 4 may be a bit more controversial and require more
discussions, it would be possible to merge only 1, 2 and 5 and discuss
the others separately.  Or even just 1 and 5.

This series is called "v3" because what's now patch 5 was already at v2,
so I thought it was less confusing this way.


Andrew Burgess (1):
  gdb: better handling of 'S' packets

Simon Marchi (4):
  gdb: make the remote target track its own thread resume state
  gdb: remove target_ops::commit_resume implementation in
    record-{btrace,full}.c
  gdb: move commit_resume to process_stratum_target
  gdb: generalize commit_resume, avoid commit-resuming when threads have
    pending statuses

 gdb/infcmd.c                                  |   8 +
 gdb/infrun.c                                  | 126 ++++-
 gdb/infrun.h                                  |  41 ++
 gdb/linux-nat.c                               |   5 +
 gdb/mi/mi-main.c                              |   2 +
 gdb/process-stratum-target.c                  |  14 +
 gdb/process-stratum-target.h                  |  38 ++
 gdb/record-btrace.c                           |  11 -
 gdb/record-full.c                             |  20 +-
 gdb/remote.c                                  | 431 +++++++++++++-----
 gdb/target-delegates.c                        |  22 -
 gdb/target.c                                  |  22 -
 gdb/target.h                                  |  20 -
 .../gdb.server/stop-reply-no-thread-multi.c   |  77 ++++
 .../gdb.server/stop-reply-no-thread-multi.exp | 136 ++++++
 15 files changed, 740 insertions(+), 233 deletions(-)
 create mode 100644 gdb/testsuite/gdb.server/stop-reply-no-thread-multi.c
 create mode 100644 gdb/testsuite/gdb.server/stop-reply-no-thread-multi.exp

-- 
2.29.2