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On 11/14/2017 10:47 PM, Joseph Myers wrote:
On Tue, 14 Nov 2017, Florian Weimer wrote:Your test case already used an indirect call before the change with GCC 7. I think we should try to fix this in GCC. GCC 4.8 used to generate a direct call here, so this is a minor regression in the area of security hardening.How do you suggest the compiler could tell that longjmp is only ever called from the same iteration of the outer loop as setjmp?
I'm not sure if I understand your question correctly.The jump buffer does not even live as long as one iteration of the loop, so it necessarily has to be the same iteration.
Thanks, Florian
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