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Re: __builtin_return_address (0) and inlining

>>>>> "Eric" == Eric Christopher <echristo@redhat.com> writes:

 Eric> On Wed, 2002-06-05 at 14:46, Alexandre Oliva wrote:
 >> On Jun 5, 2002, DJ Delorie <dj@redhat.com> wrote:
 >> 
 >> > When converted, __builtin_return_address(0) will properly return
 >> the > RA for the function it gets inlined into, rather than an
 >> unpredictable > value.
 >> 
 >> That's still probably not what the person who wrote
 >> __builtin_return_address(0) wanted.
 >> 

 Eric> I'd agree with this. I think that this behavior would be
 Eric> unexpected.

Perhaps, but it could be documented as such, and at least it's then a
meaningful value.

One use for __builtin_return_address() is to print a stack trace for
debugging.  A reasonable expectation is that printing
__builtin_return_address(i) for i = 0..n will produce the same
sequence of information as "bt" in gdb would show.  And I think that's
what the proposal will do.  

     paul
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