Re: [PATCH v4 10/20] kernel-shark: Start using data streams

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On Wed, 18 Nov 2020 16:49:53 +0200
"Yordan Karadzhov (VMware)" <y.karadz@xxxxxxxxx> wrote:


> @@ -327,6 +302,34 @@ int kshark_add_stream(struct kshark_context *kshark_ctx)
>  	return stream->stream_id;
>  }
>  
> +/**
> + * @brief Use an existing Trace data stream to open and prepare for reading
> + *	  a trace data file specified by "file".
> + *
> + * @param stream: Input location for a Trace data stream pointer.
> + * @param file: The file to load.
> + *
> + * @returns Zero on success or a negative error code in the case of an errno.
> + */
> +int kshark_stream_open(struct kshark_data_stream *stream, const char *file)
> +{
> +	struct kshark_context *kshark_ctx = NULL;
> +
> +	if (!stream || !kshark_instance(&kshark_ctx))
> +		return -EFAULT;
> +
> +	stream->file = strdup(file);

Should probably check the result of the allocation of file.

> +
> +	if (kshark_tep_check_data(file)) {
> +		kshark_set_data_format(stream->data_format,
> +				       TEP_DATA_FORMAT_IDENTIFIER);
> +
> +		return kshark_tep_init_input(stream, file);

Why pass in file, if it is going to equal stream->file?

Couldn't kshark_tep_init_input() just use whatever is in the stream->file?

-- Steve


> +	}
> +
> +	return -ENODATA;
> +}
> +
>  /**
>   * @brief Remove Data stream.
>   *



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