Question

我无法在Linux环境下使用pgf90 fortran编译器两次调用相同的子程序。第一次调用子程序是可以的但是第二次调用它会产生分段错误。有人可以提出一些建议，我的代码有什么问题，简单的例子是

P.S。与gfortran一起，没关系，即使我在intel visual fortran上试过它也没问题

program main 

use module_Append_1DI

implicit none 

integer, allocatable:: Arr(:)

integer::Brr(2)

Brr=[3, 4]

call Append_1DI(Arr,Brr)

write(*,*)Arr

call Append_1DI(Arr,Brr)

write(*,*)Arr

end program main

module module_Append_1DI

contains

subroutine Append_1DI(A,B)

implicit none 

!================================================

integer, allocatable, intent(inout)::A(:)

integer, intent(in)::B(:)

integer, allocatable::temp(:)

integer::sizeA,sizeB,sizeN

!================================================

sizeA=size(A); sizeB=size(B); sizeN=sizeA+sizeB

allocate(temp(sizeN)); temp(1:sizeA)=A

call move_alloc(from=temp,to=A)

A(sizeA+1:sizeN)=B

end subroutine Append_1DI

end module module_Append_1DI

Answer 1

说实话，我很惊讶它在您第一次打电话时起作用。那是因为A不会被分配，并且不允许在未分配的可分配数组上使用内在大小。事实上，如果你打开所有的检查标志ifort告诉你这个

Wot now? ifort --version
ifort (IFORT) 12.0.4 20110427
Copyright (C) 1985-2011 Intel Corporation.  All rights reserved.

Wot now? ifort -check all -g -traceback s.f90
Wot now? ./a.out
forrtl: severe (408): fort: (8): Attempt to fetch from allocatable variable A when it is not allocated

Image              PC                Routine            Line        Source             
a.out              000000000046A3FA  Unknown               Unknown  Unknown
a.out              0000000000468F75  Unknown               Unknown  Unknown
a.out              0000000000420B56  Unknown               Unknown  Unknown
a.out              0000000000404C95  Unknown               Unknown  Unknown
a.out              00000000004050E9  Unknown               Unknown  Unknown
a.out              0000000000402ED5  module_append_1di          24  s.f90
a.out              000000000040385F  MAIN__                     46  s.f90
a.out              0000000000402B2C  Unknown               Unknown  Unknown
libc.so.6          00007FB5F826DEFF  Unknown               Unknown  Unknown
a.out              0000000000402A29  Unknown               Unknown  Unknown

gfortran不太清楚，但仍然告诉你一些错误

Wot now? gfortran --version
GNU Fortran (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2
Copyright (C) 2010 Free Software Foundation, Inc.

GNU Fortran comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of GNU Fortran
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING

Wot now? gfortran -Wall -Wextra -pedantic -fbounds-check -std=f2003 -g -fbacktrace s.f90
Wot now? ./a.out
At line 24 of file s.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array 'temp' (1252015568/139957056323024)

Backtrace for this error:
  + function append_1di (0x400EC7)
    at line 24 of file s.f90
  + in the main program
    at line 48 of file s.f90
  + /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xff) [0x7f4a4a1deeff]

要从Sun / oracle中选择另一个随机编译器，再次得到相同的消息

Wot now? f90 -V
f90: Sun Fortran 95 8.5 Linux_i386 2010/08/13
usage: f90 [ options ] files.  Use 'f90 -flags' for details
Wot now? f90 -C s.f90
Wot now? ./a.out

 ******  FORTRAN RUN-TIME SYSTEM  ******
 Attempting to use an unallocated ALLOCATABLE 'A'
 Location:  line 22 column 16 of 's.f90'
Aborted

所以问题是在分配A之前使用A.

您认为这是一个零大小的数组是否存在混淆？那么你需要从头脑中解决这个问题 - 一个未分配的可分配数组根本没有定义的大小，这与分配的零大小数组非常不同。

伊恩

在linux上的pgf90编译器上第二次调用子例程的分段错误

1 个答案: