From: Andrew Burgess <aburgess@redhat.com>
To: gdb-patches@sourceware.org
Cc: Pedro Alves <pedro@palves.net>, Simon Marchi <simark@simark.ca>,
Andrew Burgess <aburgess@redhat.com>
Subject: [PATCHv2 0/2] displaced stepping debug improvements
Date: Wed, 22 Mar 2023 21:17:36 +0000 [thread overview]
Message-ID: <cover.1679519312.git.aburgess@redhat.com> (raw)
In-Reply-To: <8473de37-fa6b-f7ec-e4b6-78b971324804@simark.ca>
This mini series is just an expansion of the first patch from the
parent series: improvements to the displaced stepping debug output.
In V2:
- As Simon suggested, the debug has now moved to
displaced_step_prepare_throw, so the (not yet upstreamed)
displaced stepping for the AMD GPU target should still see the
debug output,
- The debug code now handles a failure to disassemble better:
there's nothing worse than enabling debug to try and solve a
problem, and having GDB crash in a different way. If an
instruction fails to disassemble GDB will now print a basic debug
message and skip the rest of the debug output,
- As suggested, I've moved the displaced_step_dump_bytes helper
function into gdbsupport/ and given it a better name,
- I have NOT tried to implement the improvement Simon suggested
where the architecture backend tells GDB core how many bytes the
replacement instruction(s) occupied. This still means that in
some cases we will disassemble the entire displaced step buffer
unnecessarily, but I don't see that as a huge problem. Fixing
this just to reduce some debug output a little seems excessive.
Let me know if you feel this is a blocker for this work being
merged and I can take another look at it.
Thanks,
Andrew
---
Andrew Burgess (2):
gdb: more debug output for displaced stepping
gdb: move displaced_step_dump_bytes into gdbsupport (and rename)
gdb/amd64-tdep.c | 2 +-
gdb/displaced-stepping.c | 3 +-
gdb/i386-tdep.c | 2 +-
gdb/infrun.c | 101 ++++++++++++++++++++++++-------------
gdb/infrun.h | 3 --
gdb/rs6000-tdep.c | 2 +-
gdb/s390-tdep.c | 2 +-
gdbsupport/array-view.h | 1 +
gdbsupport/common-utils.cc | 18 +++++++
gdbsupport/common-utils.h | 15 ++++++
10 files changed, 105 insertions(+), 44 deletions(-)
base-commit: bf3f6c02d73f9823b8cb4f59524f29fbbfb6126d
--
2.25.4
next prev parent reply other threads:[~2023-03-22 21:17 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-23 15:46 [PATCH 0/3] AMD64 Displaced Stepping Fix Andrew Burgess
2023-02-23 15:46 ` [PATCH 1/3] gdb: more debug output for displaced stepping Andrew Burgess
2023-02-23 15:46 ` [PATCH 2/3] gdb: remove gdbarch_displaced_step_fixup_p Andrew Burgess
2023-02-23 15:46 ` [PATCH 3/3] gdb: fix reg corruption from displaced stepping on amd64 Andrew Burgess
2023-03-16 16:39 ` [PATCHv2 0/4] AMD64 Displaced Stepping Fix Andrew Burgess
2023-03-16 16:39 ` [PATCHv2 1/4] gdb: more debug output for displaced stepping Andrew Burgess
2023-03-21 12:29 ` Pedro Alves
2023-03-21 14:41 ` Simon Marchi
2023-03-22 21:17 ` Andrew Burgess [this message]
2023-03-22 21:17 ` [PATCHv2 1/2] " Andrew Burgess
2023-03-22 21:17 ` [PATCHv2 2/2] gdb: move displaced_step_dump_bytes into gdbsupport (and rename) Andrew Burgess
2023-03-27 12:35 ` [PATCHv2 0/2] displaced stepping debug improvements Andrew Burgess
2023-03-21 14:45 ` [PATCHv2 1/4] gdb: more debug output for displaced stepping Simon Marchi
2023-03-16 16:39 ` [PATCHv2 2/4] gdb: remove gdbarch_displaced_step_fixup_p Andrew Burgess
2023-03-21 13:10 ` Pedro Alves
2023-03-22 21:22 ` Andrew Burgess
2023-03-16 16:39 ` [PATCHv2 3/4] gdb: fix reg corruption from displaced stepping on amd64 Andrew Burgess
2023-03-21 13:23 ` Pedro Alves
2023-03-16 16:39 ` [PATCHv2 4/4] gdb: remove redundant signal passing Andrew Burgess
2023-03-27 12:32 ` [PATCHv3 0/3] AMD64 Displaced Stepping Fix Andrew Burgess
2023-03-27 12:32 ` [PATCHv3 1/3] gdb: more debug output for displaced stepping Andrew Burgess
2023-03-28 13:05 ` Simon Marchi
2023-03-28 15:08 ` Andrew Burgess
2023-03-28 15:11 ` Simon Marchi
2023-03-29 9:42 ` Andrew Burgess
2023-03-27 12:32 ` [PATCHv3 2/3] gdb: move displaced_step_dump_bytes into gdbsupport (and rename) Andrew Burgess
2023-03-28 13:10 ` Simon Marchi
2023-03-29 9:43 ` Andrew Burgess
2023-03-27 12:32 ` [PATCHv3 3/3] gdb: fix reg corruption from displaced stepping on amd64 Andrew Burgess
2023-03-29 9:43 ` Pedro Alves
2023-03-28 12:33 ` [PATCHv3 0/3] AMD64 Displaced Stepping Fix Simon Marchi
2023-03-28 15:29 ` Andrew Burgess
2023-03-29 13:46 ` [PATCHv4] gdb: fix reg corruption from displaced stepping on amd64 Andrew Burgess
2023-04-04 13:03 ` Pedro Alves
2023-04-06 13:29 ` Andrew Burgess
2023-04-06 15:38 ` Andrew Burgess
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