Error stack strawman

[Andreas Rossberg]

On 19 February 2016 at 10:29, Andreas Rossberg <rossberg at google.com> wrote:

> On 19 February 2016 at 06:29, John Lenz <concavelenz at gmail.com> wrote:
>
>> However, at the CPU level, it seems like you would be better pushing an
>> return address for a special function that indicated the start of a
>> sequence of tail calls.  That way you trade only some
>> complexity/performance for tail calls (an inspection of the last entry of
>> the call stack) and some stack frame building complexity (to recognize this
>> "special" frame).
>>
>
> There is no way of knowing, neither statically nor dynamically, that you
> are at "the start of a sequence of tail calls". And doing it for every tail
> call would of course defeat tail calls.
>

Or to put that differently: if there was, then the very problem wouldn't
exist. ;)
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