linux-kernel - [PATCHv4 00/12] gdb/scripts: Linux awareness debug commands

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Date:	Wed, 30 Mar 2016 13:00:39 +0100
From:	Kieran Bingham <kieran.bingham@...aro.org>
To:	jan.kiszka@...mens.com, linux-kernel@...r.kernel.org
Cc:	lee.jones@...aro.org, peter.griffin@...aro.org,
	maxime.coquelin@...com, Kieran Bingham <kieran.bingham@...aro.org>
Subject: [PATCHv4 00/12] gdb/scripts: Linux awareness debug commands

Hopefully, version 4 of this patchset now starts to look like a useful set of
additions. Whilst this set drops the lx-interrupts command, I am actually quite
pleased with the effectiveness of the $lx_radix_tree_lookup function which
will be more generically useful across multiple subsystems.

I have also dropped lx-meminfo (for now) as it is just not in a viable state
for integration, whereas the other patches in this set (hopefully) are.

I believe that being able to identify the memory profiles of a crashed system
is a useful debug feature, however currently the command is presenting more
inaccurate information than I deem acceptable, and it will need to be worked
on separately. I will likely post this current state separately for reference
or if anyone is interested in it, but I don't want it's state to block these
patches.

I have run these against PEP8 for both version 1.4.6 (Ubuntu 14.04), and 1.6.2
(Ubuntu 15.10) which hopefully means we won't come across the issues of the
previous set, but I did not have easy access to v1.5.7.

I haven't yet discovered why lx-mounts prints a root / root line, where
/proc/mounts does not, but the ST implementation appears to also print this.

For convenience, this patch set submission can be found at
 http://git.linaro.org/people/kieran.bingham/linux.git gdb-scripts-v4

v4:
 - list generator improved after review comments
 - Alternate PEP8 warnings fixed
 - lx_radix_tree_lookup added as function with example in Documentation
 - lx-cpus command added
 - lx-interrupts dropped
 - lx-meminfo dropped from this set (TBC separately)

v3:
 - dentry_name moved to utils package
 - PEP8 warnings fixed
 - CPU iterators added
 - Radix Tree parser added
 - lx-interrupts added
 - lx_thread_info_by_pid added

v2:
 - constants.py integrated to KBuild
 - Linked lists added from Jeff Mahoneys implementation
 - Modules converted to use list generators
 - !CONFIG_MODULES supported gracefully
 - lx-meminfo command improved for !CONFIG_MMU targets

Kieran Bingham (12):
  scripts/gdb: Provide linux constants
  scripts/gdb: Provide kernel list item generators
  scripts/gdb: Convert modules usage to lists functions
  scripts/gdb: Provide exception catching parser
  scripts/gdb: Support !CONFIG_MODULES gracefully
  scripts/gdb: Provide a dentry_name VFS path helper
  scripts/gdb: Add io resource readers
  scripts/gdb: Add mount point list command
  scripts/gdb: Add cpu iterators
  scripts/gdb: Add a Radix Tree Parser
  scripts/gdb: Add documentation example for radix tree
  scripts/gdb: Add lx_thread_info_by_pid helper

 Documentation/gdb-kernel-debugging.txt |  21 +++++
 Kbuild                                 |  10 +++
 scripts/gdb/linux/Makefile             |  12 ++-
 scripts/gdb/linux/constants.py.in      |  59 +++++++++++++
 scripts/gdb/linux/cpus.py              |  38 ++++++++
 scripts/gdb/linux/lists.py             |  21 +++++
 scripts/gdb/linux/modules.py           |  22 +++--
 scripts/gdb/linux/proc.py              | 156 +++++++++++++++++++++++++++++++++
 scripts/gdb/linux/radixtree.py         |  97 ++++++++++++++++++++
 scripts/gdb/linux/tasks.py             |  19 ++++
 scripts/gdb/linux/utils.py             |  15 ++++
 scripts/gdb/vmlinux-gdb.py             |   2 +
 12 files changed, 459 insertions(+), 13 deletions(-)
 create mode 100644 scripts/gdb/linux/constants.py.in
 create mode 100644 scripts/gdb/linux/radixtree.py

-- 
2.5.0