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

Mark Brown

Hi all,

I'm getting a SEGV from the DebugServer when loading a program into the C6670 cycle approximate model (1 core only). Here are the particulars:

CCSv5.1.0 M7 - linux

Model: C6670 Device Cycle Approximate Simulator, Big Endian_0/TMS320C66x_0

Script log excerpt:

Stack trace excerpt:

All works OK on the Windows platform.

Thanks,

Mark Brown

over 14 years ago

0 Ki over 14 years ago

TI__Guru**** 467491 points

Hi Mark,

Any chance you could provide the *.out file causing the crash?

Thanks

0 Mark Brown over 14 years ago in reply to Ki

Intellectual 360 points

Ki,

Unfortunately I cannot download files from the system I'm on. So let's try this. The code I'm trying to run is a very small simple testcase. The problem seems to be more general with the loading process on linux. Here is the code I'm trying to run:

Fullscreen 0763.main.txt Download

#include <stdint.h>
#include <stdio.h>

#define SAMPLES 0x400
int16_t input1[SAMPLES];
int32_t output;

void real_sum_ptr(int16_t *input1, int32_t *output, int length)
{
    int n;
    *output=0;
    for (n = 0; n < length; n++) {
        *output += *(input1++);
    }
}

int main(void)
{
    int size;
    FILE *output_file;

    if ((output_file = fopen("output.list", "w")) == 0) {
        perror("fopen");
    }

    for (size = 0; size < SAMPLES; size++) {
        input1[size] = (size & 0xf);
    }
    output = -1;

    real_sum_ptr(input1, &output, SAMPLES);
    fprintf(output_file, "real_sum_ptr %d %d\n", size, output);

    return 0;
}

// End of file

Please build this testcase on your linux system for the C6600 platform (-mv6600) and run it on the C6670 cycle approximate model. If it woks for you, send me the .out file you created and I will try to run it on my installation. I can upload files but not download them. Let me know if this is possible.

Thanks,

Mark

0 Ki over 14 years ago in reply to Mark Brown

TI__Guru**** 467491 points

Hi Mark,

I build the example you provided and was able to load and run via both CCS and DSS without issue. I have attached the entire project

hello.tar.gz

0 Mark Brown over 14 years ago in reply to Ki

Intellectual 360 points

Ki,

I tried out your executable code and it works just fine! OK so what gives??? Based on the function names within the stack trace it is failing in C function strlen. This usually happens with a bad or null pointer (been there done that... :) ). The calling function name seems to indicate it is working with the "coff name" or I surmise the name of the program file. So I compared the program names that I use with the one in your "hello" project. Yours has the suffix .out on it, mine does not. So I added a .out suffix on the end of the program name that I generate and sure enough it works!!! To complete the test I removed the .out suffix from your program (hello.out -> hello) and it fails with the segv in strlen. I can add a suffix for the time being but this should be fixed.

Thanks, a mostly happy camper!!!

Mark

0 Ki over 14 years ago in reply to Mark Brown

TI__Guru**** 467491 points

Hi Mark,

fyi - I have filed a bug for this: SDSCM00042162

thanks

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