On Wed, 17 Jan 2024, Hugh Parsonage wrote:
My package grattan fails the Intel[1] check with
Error: segfault from C stack overflow
I am unable to immediately see where in the test suite this error has
occurred. I seek advice on how to fix this error. The only hunch I
have is that the package uses C code and includes structs with arrays
on the stack, which perhaps are excessive for the Intel check machine,
but am far from confident that's the issue. The repository is at
<https://github.com/HughParsonage/grattan/>
Two possibilities to look into:
* your structures on the stack are large. Don't do this ! Your code
might run faster and would be easier to debug if you use regular memory
allocation instead. Since R does fair number of memory allocation calls
itself, the extra overhead from your calls will not be that noticeable.
* your stuctures are small, but you have a recursive function that is
called too often. In this case, the solution is to reimplement the
recurrence without doing function calls (using a loop, for example). Some
recurrences can be implemented without using any accumulating state.
Others need it and you can use heap memory for that.
best
Vladimir Dergachev
[1]https://www.stats.ox.ac.uk/pub/bdr/Intel/grattan.out
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