Use dbx to find the source code line where a segmentation fault has occurred.
Use a program to generate a segmentation fault.
demo% cat WhereSEGV.f INTEGER a(5) j = 2000000 DO 9 i = 1,5 a(j) = (i * 10) 9 CONTINUE PRINT *, a END demo%
Use dbx to find the line number of a dbx segmentation fault.
demo% f95 -g -silent WhereSEGV.f demo% a.out Segmentation fault demo% dbx a.out Reading symbolic information for a.out program terminated by signal SEGV (segmentation violation) (dbx) run Running: a.out signal SEGV (no mapping at the fault address) in MAIN at line 4 in file "WhereSEGV.f" 4 a(j) = (i * 10) (dbx)