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Re: Sparc ASAN

On Wed, 2012-11-21 at 15:27 -0500, David Miller wrote:
> Actually I looked more closely at this, and the trigger is hit one
> stack frame too late on sparc.
> 
> The BP computed in the memcmp() interceptor is the frame pointer
> %fp, but on sparc that's the CFA of the caller, main() in the
> case of the memcmp-1.c testcase.
> 
> So only main() appears in the backtrace.
> 
> It might be easier to implement this by comparing the PC instead.
> 
> And it also occurs to me that we probably need to be using
> __builtin_extract_return_addr() when recording the PC at the
> error trigger point.

If you have a suggested change/patch that does that, let me know
and I can try it out on powerpc to make sure it works for us too.

Peter
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