Format_ept segv when feeding it with a trace file from the C6670 cycle approximate simulator model (linux platform)

Mark Brown

Hi all,

I get a segv when using the format_ept program on a trace file (.ept) generated by the C6670 cycle approximate simulator model. This happens when using trace files created on both the linux and Windows platforms. The vitals:

ccsv5.1.0 M7 (linux)

C6670 cycle approximate simulator under DSS

The specific point of failure in the format_ept program is as follows:

The variable ep_trace_reader_if is set to NULL by the constructor. No messages are emitted. The segv happens in the following line when trying to use the variable set to NULL. Since the ep_trace_reader_intf_t object is only available in object form (only library provided), I can't debug inside of it.

I have also verified that this fails on trace files generated from the small testcase used in the previous post:

DSS SEGV during program load with C6670 cycle approximate model (linux platform)

Thanks,

Mark

over 13 years ago

0 JohnS over 13 years ago

TI__Guru**** 162295 points

Mark,

We have flagged this for our simulation team to look.

Regards,

John

0 Sheshadri Chakravarthy over 13 years ago in reply to JohnS

TI__Intellectual 1420 points

Mark,

I have filed a bug SDSCM00041827 to track this issue. Could you let us know the customer name/company and criicality of this defect (major/minor) to the customer.

regards,

Sheshadri

0 Mark Brown over 13 years ago in reply to Sheshadri Chakravarthy

Intellectual 360 points

[RandyP: Customer information has been supplied separately.]

Criticality: Major+ (We are stopped with no work-around slipping deadlines by the day.)

Thanks,

Mark

0 Sheshadri Chakravarthy over 13 years ago in reply to Mark Brown

TI__Intellectual 1420 points

Mark,

Found the issue here. You need to use the latest convert to txt utility which I have uploaded at http://processors.wiki.ti.com/index.php/EP_Trace#EP_Trace_to_Text_Converter. You should see 2 links one for version2,3 of EP trace and latest one for version4 of EP trace.

There is also a minor change to the EP trace file for version4 (that includes total cycles as an additional field ). The new convert to txt utility should solve the problem.

regards,

Sheshadri

0 RandyP over 13 years ago in reply to Sheshadri Chakravarthy

TI__Guru* 84110 points

On behalf of Mark Brown:

Sheshadri,

Thanks for responding so quickly. When I downloaded the new format_ept version I noticed that it only supported the PC version of the tool. Unfortunately I need the linux version along with the lib directory containing the writer-reader libraries so I can build it here locally. I need to customize the source code for our use.

Thanks,
Mark

0 RandyP over 13 years ago in reply to RandyP

TI__Guru* 84110 points

On behalf of Mark Brown:

Sheshadri,

Thanks. So far it is working fine. The reported segfault is fixed. I’ll be testing it thoroughly during the rest of this week.

Thanks,
Mark

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Format_ept segv when feeding it with a trace file from the C6670 cycle approximate simulator model (linux platform)

DSS SEGV during program load with C6670 cycle approximate model (linux platform)