Re: [PATCH v2 4/4] trace-cmd: Dump fraction bits from TRACECMD_OPTION_TIME_SHIFT

[Steven Rostedt <rostedt@goodmis.org>]

On Thu, 14 Oct 2021 18:02:04 +0300
"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com> wrote:

> +		read_file_number(fd, &cpus_data[j].count, 4);
> +		size -= 4;
> +		do_print(OPTIONS, "%lld [samples count for CPU %d]\n", cpus_data[j].count, j);
> +		cpus_data[j].times = calloc(cpus_data[j].count, sizeof(long long));
> +		cpus_data[j].offsets = calloc(cpus_data[j].count, sizeof(long long));
> +		cpus_data[j].scalings = calloc(cpus_data[j].count, sizeof(long long));

> +		cpus_data[j].frac = calloc(cpus_data[j].count, sizeof(long long));

> +		if (!cpus_data[j].times || !cpus_data[j].offsets ||
> +		    !cpus_data[j].scalings || !cpus_data[j].frac)
> +			goto out;
> +		for (i = 0; i < cpus_data[j].count; i++) {
> +			if (size < 8)
> +				goto out;
> +			read_file_number(fd, cpus_data[j].times + i, 8);
> +			size -= 8;
> +		}
> +		for (i = 0; i < cpus_data[j].count; i++) {
> +			if (size < 8)
> +				goto out;
> +			read_file_number(fd, cpus_data[j].offsets + i, 8);
> +			size -= 8;
> +		}
> +		for (i = 0; i < cpus_data[j].count; i++) {
> +			if (size < 8)
> +				goto out;
> +			read_file_number(fd, cpus_data[j].scalings + i, 8);
> +			size -= 8;
> +		}
> +	}
>  
> +	if (size > 0) {
> +		for (j = 0; j < cpus; j++) {
> +			if (!cpus_data[j].frac)
> +				goto out;
> +			for (i = 0; i < cpus_data[j].count; i++) {
> +				if (size < 8)
> +					goto out;
> +				read_file_number(fd, cpus_data[j].frac + i, 8);
> +				size -= 8;
> +			}
> +		}
>  	}
> +
> +	for (j = 0; j < cpus; j++) {
> +		for (i = 0; i < cpus_data[j].count; i++)
> +			do_print(OPTIONS, "\t%lld %lld %llu %llu[offset * scaling >> fraction @ time]\n",
> +				 cpus_data[j].offsets[i], cpus_data[j].scalings[i],
> +				 cpus_data[j].frac[i], cpus_data[j].times[i]);
> +
> +	}
> +
>  out:
> -	free(times);
> -	free(offsets);
> -	free(scalings);
> +	if (j < cpus)
> +		do_print(OPTIONS, "Broken time shift option\n");
> +	for (j = 0; j < cpus; j++) {
> +		free(cpus_data[j].times);
> +		free(cpus_data[j].offsets);
> +		free(cpus_data[j].scalings);

Looks like you forgot to add:

		free(cpus_data[j].frac);

This is the only issue I found in this series. I'll just add a patch to fix
it and move on.

Thanks!

-- Steve


> +	}
> +	free(cpus_data);