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Re: -symbol-list-lines
On Mon, Feb 16, 2004 at 03:45:16PM -0500, Daniel Jacobowitz wrote:
> On Mon, Feb 16, 2004 at 03:40:35PM -0500, Bob Rossi wrote:
> > I am seeing 2 potential problems,
> >
> > Several lines come back as {pc="0x08048406",line="0"},
> > should the value "0" be documented? or is it a bug?
> >
> > Also, for some reason, a value is repeated
> > {pc="0x0804849c",line="38"}. Is this ok?
>
> I can't say anything about what is appropriate (or useful) for the MI
> interface but I can tell you what's going on. This matches the
> structure of the internal line table precisely.
>
> - line 0 means end-of-sequence. I.E. PCs greater than 0x8048406 that
> don't have a new starting line do not belong to this line number table.
I personally can't see why this would be useful to front ends. Can
anyone else? If it isn't, I will submit a patch to not print this data.
> - duplicated line numbers are emitted by the compiler to mark, mostly,
> the ends of prologues. Sometimes the prologue is zero-sized.
Would keeping a list internally of numbers that have been sent out
already be reasonable? or is it repeating the data unimportant?
I would also be willing to fix this.
Bob Rossi