Segmentation fault, assigning arrays - with Intel v14

Question

I am trying to compile and run code that was supposedly successfully compiled and run using Intel compiler version 11. However I have version 14, and I can not manage to run it without getting segmentation fault.

subroutine iireg2(iidata,iicoeffs)
use myparams
implicit none
real(8):: iidata(:,:)
real(8)::z(size(iidata,1),size(iidata,2)-1)
real(8)::iicoeffs(size(iidata,2)-1)
integer:: ncoeffsa,flag1,i

ncoeffsa=size(iidata,2)-1

print*, 'this is ncoeffsa', ncoeffsa
print*, 'this is aaiadata1', iidata(1,:)
print*, 'this is size', size(iidata,2)-1
print*, 'this is aaiadata2', iidata(1,2:(ncoeffsa+1))
print*, 'this is aaiadata2', iidata(143345,2:(ncoeffsa+1))

print*, 'dimz 1', size(z,1)
print*, 'dimz 2', size(z,2)
print*, 'dimiidata 1', size(iidata,1)
print*, 'dimiidata 2', size(iidata,2)

! segmentation fault occurs if I uncomment below
! and pass N x 12 array. If I pass N x 1 array
! I do not get segmentation fault.
!z(:,:)=iidata(:,2:(ncoeffsa+1))
end subroutine iireg

I call that subroutine with something like the following

print*, 'stempp', stempp
print*, 'siidata outside', siidata(1,:)
print*, 'siidata 1 dim', size(siidata,2)-1
print*, 'siidata 2 dim', size(siidata,1)
siidata = siidata*0
stempp = stempp*0

call iireg2(siidata,stempp)

Before I use this subroutine, I print and make sure that all dimensions are correct. I also replace all entries of the matrix with zeros just for now. All dimensions and sizes match up. Variables types are also correct. The function works successfully if I pass something that has dimension N x 1 (N is around 10,000). However when I pass something that happens to be N x 12, I get segmentation fault.

Is an explicit interface for the subroutine available in the calling scope (if not, it needs one). Are you likely to be running into stack size limits? Are you compiling with the -heaparrays option? — IanH
– IanH, Commented Feb 22, 2016 at 9:37
Do you use modules? Or interface blocks? Where is that subroutine relative to the calling code? Can you prepare a full small example? stackoverflow.com/help/mcve — Vladimir F Героям слава
– Vladimir F Героям слава, Commented Feb 22, 2016 at 10:54

BChow · Accepted Answer · 2016-02-22 15:34:15Z

2

Have you tried the -heap-arrays compiler option? This article list the possible causes for segmentation faults: https://software.intel.com/en-us/articles/determining-root-cause-of-sigsegv-or-sigbus-errors

answered Feb 22, 2016 at 15:34

BChow

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1 Comment

Edith Over a year ago

Thank you very much! that indeed solved the problem.

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