Re: error to run systemtap in an ARM platform

[Zheng Da <zhengda1936 at gmail dot com>]

Hello,

I'm still trying to fix the problem.
semantic error: failed to retrieve return value location for vfs_write
(/build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-kernel-9999/fs/read_write.c):
identifier '$return' at read-write.stp:7:6
        source: 	if ($return > 0) {
                	    ^
I'm pretty sure CONFIG_DEBUG_INFO is enabled, and in
/build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-kernel-9999/build/tegra2_seaboard,
a binary file vmlinux is 57MB. It should contain the debug information.

(cr) zhengda@zdpc
/build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-k
ernel-9999/build/tegra2_seaboard $ ls -l vmlinux
-rwxr-xr-x 1 zhengda portage 59419805 Jul 22 20:55 vmlinux

How does systemtap use the debug information? When it compiles the
script, does it need to read the debug information from the kernel
image? or it needs to read the .obj files of the kernel?
Any ideas how to debug the problem?

Thanks,
Da

On Mon, Jul 18, 2011 at 1:41 PM, Da Zheng <zhengda1936@gmail.com> wrote:
> Hello,
>
> On 07/18/11 13:09, William Cohen wrote:
>>
>> On 07/18/2011 03:01 PM, Da Zheng wrote:
>>>
>>> Hi,
>>>
>>> I got another problem. I tried to compile the example desktop.stp in the
>>> website, but failed.
>>
>> Do you have a pointer to where you got the desktop.stp script? Is that
>> disktop.stp in the systemtap examples?
>
> Yes, http://sourceware.org/systemtap/examples/io/disktop.stp
>>
>> Did you compile your kernel with the debug information available?
>>
>> CONFIG_DEBUG_INFO=y
>>
>> Also from what I recall some kernel can just include file and line number
>> information, with
>> CONFIG_DEBUG_INFO_REDUCED. That is turned off in the kernel .config?
>
> Yes, I have checked .config in
> /build/tegra2_seaboard/tmp/portage/sys-kernel/chromeos-kernel-9999/work/chromeos-kernel-9999/build/tegra2_seaboard,
> where my kernel is compiled.
> CONFIG_DEBUG_INFO is on and CONFIG_DEBUG_INFO_REDUCED is turned off.
> I think this is not a problem.
>>>
>>> BTW, I think the latest version in the git repository has another bug.
>>> If I run ./configure; make, I get
>>> cscommon.h:7:17: error: ssl.h: No such file or directory
>>> I don't know what I should install to have ssl.h
>>> I already have
>>> /usr/include/nss/ssl.h
>>> /usr/include/openssl/ssl.h
>>>
>>> It can be compiled if I use --disable-server. However, in my cross
>>> compiling environment, even though I have already used --disable-server, I
>>> still get the same compilation error.
>>>
>>> Thanks,
>>> Da
>>
>> You do a "make distclean" and "configure ..." on your cross compiling
>> machine to get rid of the dependencies in .deps. I think that be stale and
>> the reason why you are gitting that error.
>
> I have done "make distclean", but I still get the error :(
>
> Best,
> Da
>