Re: [Qemu-devel] [Tracing][PATCH v2] Add options to specify trace file name at startup and runtime.

[malc <av1474@comtv.ru>]

On Wed, 4 Aug 2010, Prerna Saxena wrote:

> This patch adds an optional command line switch '-trace' to specify the 
> filename to write traces to, when qemu starts.
> Eg, If compiled with the 'simple' trace backend,
> [temp@system]$ qemu -trace FILENAME IMAGE
> Allows the binary traces to be written to FILENAME instead of the option 
> set at config-time. 
> 
> Also, this adds monitor sub-command 'set' to trace-file commands to 
> dynamically change trace log file at runtime. 
> Eg,
> (qemu)trace-file set FILENAME
> This allows one to set trace outputs to FILENAME from the default 
> specified at startup.
> 
> Changelog from v1 :
> - Cleanups.

[..snip..]

> +    st_set_trace_file_enabled(false);
>  
> -    if (asprintf(&filename, CONFIG_TRACE_FILE, getpid()) < 0) {
> -        return false;
> +    free(trace_file_name);
> +
> +    if (!file) {
> +        if (asprintf(&trace_file_name, CONFIG_TRACE_FILE, getpid()) < 0) {
> +            trace_file_name = NULL;
> +	    return false;

Tab here.

> +        } 
> +    } else {
> +        if (asprintf(&trace_file_name, "%s", file) < 0) {
> +            trace_file_name = NULL;
> +            return false;
> +        }
>      }
>  
[..snip..]

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