linux-toradex.git/scripts/gdb/linux/cpus.py, branch v4.18-rc4

scripts/gdb: cast CPU numbers to integer

2016-05-24T00:04:14+00:00

We won't see more than 2 billion CPUs any time soon, and having cpu_list
return long makes the output of lx-cpus a bit ugly.

Link: http://lkml.kernel.org/r/dcb45c3b0a59e0fd321fa56ff7aa398458c689b3.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Jan Kiszka 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: add cpu iterators

2016-05-24T00:04:14+00:00

The linux kernel provides macro's for iterating against values from the
cpu_list masks.  By providing some commonly used masks, we can mirror
the kernels helper macros with easy to use generators.

Link: http://lkml.kernel.org/r/d045c6599771ada1999d49612ee30fd2f9acf17f.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham 
Signed-off-by: Jan Kiszka 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: convert CpuList to generator function

2015-02-17T22:34:55+00:00

Yet another code simplification.

Signed-off-by: Jan Kiszka 
Cc: Thomas Gleixner 
Cc: Jason Wessel 
Cc: Andi Kleen 
Cc: Ben Widawsky 
Cc: Borislav Petkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: port to python3 / gdb7.7

2015-02-17T22:34:54+00:00

I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled
against python 3.3) but there were several errors.

I believe this patch fixes these issues so that the commands now work (I
tested lx-symbols, lx-dmesg, lx-lsmod).

Main issues that needed to be resolved:

  * In python 2 iterators have a "next()" method. In python 3 it is
    __next__() instead (so let's just add both).

  * In older python versions there was an implicit conversion
    in object.__format__() (used when an object is in string.format())
    where it was converting the object to str first and then
    calling str's __format__(). This has now been removed so
    we must explicitly convert to str the objects for which
    we need to keep this behavior.

  * In dmesg.py: in python 3 log_buf is now a "memoryview" object
    which needs to be converted to a string in order to use string
    methods like "splitlines()". Luckily memoryview exists in
    python 2.7.6 as well, so we can convert log_buf to memoryview
    and use the same code in both python 2 and python 3.

This version of the patch has now been tested with gdb 7.7 and both python
3.4 and python 2.7.6 (I think asking for at least python 2.7.6 is a
reasonable requirement instead of complicating the code with version
checks etc).

Signed-off-by: Pantelis Koukousoulas 
Signed-off-by: Jan Kiszka 
Cc: Thomas Gleixner 
Cc: Jason Wessel 
Cc: Andi Kleen 
Cc: Ben Widawsky 
Cc: Borislav Petkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: add class to iterate over CPU masks

2015-02-17T22:34:54+00:00

Will be used first to count module references.  It is optimized to read
the mask only once per stop.

Signed-off-by: Jan Kiszka 
Cc: Thomas Gleixner 
Cc: Jason Wessel 
Cc: Andi Kleen 
Cc: Ben Widawsky 
Cc: Borislav Petkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: add lx_current convenience function

2015-02-17T22:34:54+00:00

This is a shorthand for *$lx_per_cpu("current_task"), i.e.  a convenience
function to retrieve the currently running task of the active context.

Signed-off-by: Jan Kiszka 
Cc: Thomas Gleixner 
Cc: Jason Wessel 
Cc: Andi Kleen 
Cc: Ben Widawsky 
Cc: Borislav Petkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

scripts/gdb: add internal helper and convenience function for per-cpu lookup

2015-02-17T22:34:54+00:00

This function allows to obtain a per-cpu variable, either of the current
or an explicitly specified CPU.

Note: sparc64 version is untested.

Signed-off-by: Jan Kiszka 
Cc: "David S. Miller" 
Cc: Thomas Gleixner 
Cc: Jason Wessel 
Cc: Andi Kleen 
Cc: Ben Widawsky 
Cc: Borislav Petkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds