Re: [Xen-devel] [PATCH 2/4] Implement code to read coverage informations

[Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>]

On Wed, 2013-02-06 at 07:51 +0000, Jan Beulich wrote:
> >>> On 05.02.13 at 16:58, Frediano Ziglio <frediano.ziglio@xxxxxxxxxx> wrote:
> > +/**
> > + * File information
> > + * Prefixed with XENCOV_TAG_FILE and a string with filename
> > + */
> > +struct xencov_file
> > +{
> > +    uint32_t version;
> > +    uint32_t stamp;
> > +} __attribute__((packed));
> > +
> > +/**
> > + * Counters information
> > + * Prefixed with XENCOV_TAG_COUNTER(n) where n is 0..(XENCOV_COUNTERS-1)
> > + */
> > +struct xencov_counter
> > +{
> > +    uint32_t num;
> > +    uint64_t values[0];
> > +} __attribute__((packed));
> > +
> > +/**
> > + * Information for each function
> > + * Prefixed with XENCOV_TAG_FUNC
> > + * Number of counter is equal to the number of counter got before
> > + */
> > +struct xencov_function
> > +{
> > +    uint32_t ident;
> > +    uint32_t checksum;
> > +    uint32_t n_ctrs[0];
> > +} __attribute__((packed));
> > +
> > +struct xencov_functions
> > +{
> > +    uint32_t num;
> > +    uint32_t xencov_function[0];
> > +} __attribute__((packed));
> 
> Once again: No use of compiler extensions in public headers.
> 
> Jan
> 

Sorry, I forgot the old mail.
Currently this header describe the output blob exported by Xen. For the
array I can just use 1 instead of 0.

I'm changing a bit the format to avoid packing and alignment problems.

Frediano

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