gcc/testsuite/gfortran.dg/allocate_alloc_opt_15.f90

   1 ! { dg-do run }
   2 ! { dg-additional-options "-fdump-tree-original" }
   3 ! PR fortran/91300 - runtime error message with allocate and errmsg=
   4 ! Contributed by zed.three
   5
   6 program bigarray_prog
   7   use, intrinsic :: iso_c_binding, only: C_INTPTR_T
   8   implicit none
   9   real(4), dimension(:), allocatable :: array, bigarray
  10   integer                 :: stat1, stat2
  11   character(len=100)      :: errmsg1, errmsg2
  12   character(*), parameter :: no_error = "no error"
  13   integer(8), parameter :: n1 = huge (1_4) / 3          ! request more than 2GB
  14   integer(8), parameter :: n2 = huge (1_C_INTPTR_T) / 4 ! "safe" for 64bit
  15   integer(8), parameter :: bignumber = max (n1, n2)
  16
  17   stat1   = -1
  18   stat2   = -1
  19   errmsg1 = no_error
  20   errmsg2 = no_error
  21   allocate (array(1), stat=stat1, errmsg=errmsg1)
  22   if (stat1   /= 0       ) stop 1
  23   if (errmsg1 /= no_error) stop 1
  24
  25   ! Obtain stat, errmsg for attempt to allocate an allocated object
  26   allocate (array(1), stat=stat1, errmsg=errmsg1)
  27   if (stat1   == 0       ) stop 2
  28   if (errmsg1 == no_error) stop 2
  29
  30   ! Try to allocate very large object
  31   allocate (bigarray(bignumber), stat=stat2, errmsg=errmsg2)
  32   if (stat2 /= 0) then
  33      print *, "stat1 =", stat1
  34      print *, "errmsg: ", trim (errmsg1)
  35      print *, "stat2 =", stat2
  36      print *, "errmsg: ", trim (errmsg2)
  37      ! Ensure different results for stat, errmsg variables (all compilers)
  38      if (stat2   == stat1                           ) stop 3
  39      if (errmsg2 == no_error .or. errmsg2 == errmsg1) stop 4
  40
  41      ! Finally verify gfortran-specific error messages
  42      if (errmsg1 /= "Attempt to allocate an allocated object") stop 5
  43      if (errmsg2 /= "Insufficient virtual memory"            ) stop 6
  44   end if
  45
  46 end program bigarray_prog
  47
  48 ! { dg-final { scan-tree-dump-times "Attempt to allocate an allocated object" 4 "original" } }
  49 ! { dg-final { scan-tree-dump-times "Insufficient virtual memory" 4 "original" } }