Re: Wrong Perf Backtraces

Hi,
Thanks! Could you tell me what should be changed in order to make the 
code runnable on your system, if it is possible?
Regards.

On 2020-03-27 13:50, Jiri Olsa wrote:

> On Thu, Mar 26, 2020 at 10:49:12PM +0430, ahmadkhorrami wrote:
> 
>> Hi,
>> Here is the link for the python script:
>> https://gofile.io/?c=1ZSLwe
>> It is written in python-3 and takes the perf script output as input.
>> It looks for consecutive repeated backtrace lines and checks if the 
>> function
>> in these lines calls itself at the offset in the line (i.e., checks if
>> recursion is possible). If not possible it reports an error. Could you 
>> check
>> to see if any error is detected in your outputs, please?
> 
> I'm getting tons of following output:
> 
> /usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2200.30: No such file or 
> directory.
> No symbol table is loaded.  Use the "file" command.
> 7ffff71b9bc1 gtk_css_node_invalidate_timestamp+0x31 
> (/usr/lib/x86_64-linux-gnu/libgtk-3.so.0.2200.30)
> 
> I assume it's because I have all the dso binaries stored
> under .biuldid path, while you check the output name
> 
> jirka
> 
> Regards.
> On 2020-03-26 20:09, Jiri Olsa wrote:
> 
> On Thu, Mar 26, 2020 at 05:50:27PM +0430, ahmadkhorrami wrote:
> 
> Hi,
> First of all, many thanks for your time. Did you say that the first
> file has
> problems?
> 
> The first file (http://gofile.io/?c=qk6oXv) has repeated gmallocn()s
> while
> the second (https://gofile.io/?c=oGxgSM) also has problems with
> unmatched
> (not necessarily repeated) function calls. I am not sure if the
> kernel for
> the second one is 5.4.7 or the generic Ubuntu kernel. But the first
> one is
> certainly 5.4.7. Just to be clear, there were many instances of these
> unmatched <caller, callees>.
> I can se all the files, but I just can't see the issue yet
> but it's probably because of issues with perf archive..
> 
> let's see if somebody else can chime in
> 
> I have a simple python script that checks for this situation. It
> disassembles functions using GDB and checks the (directly called)
> target of
> each caller. I will put some comments in the script and upload it.
> Could you
> check to see if the python script detects any mismatches in your
> backtraces?
> It takes the perf script output file as input. I will upload the
> script in
> an hour.
> ok
> 
> jirka