为什么不引发浮点异常 (FPE)？

Question

I am trying to catch some FPE in a Fortran code, but it doesn't seems to work on every environment.

I wrote the following code as example:

program test
    implicit none

    doubleprecision, dimension(1) :: x  ! used to lure the compiler

    x(1) = 1d0

    print *, 'start'
    print *, 1d0 / (1d0 - x(1))
    print *, 'end'
end program test

One of my machine (1) uses CentOS 7.6.1810, gfortran 4.8.5, and has an Intel Xenon as CPU. The other one (2) uses Debian 10 Buster (actually this one is on Windows 10, but I use the debian app for the WSL), gfortran 9.2.0 and has an Intel Core i5 as CPU.

When I compile the above code using

gfortran -o test -ffpe-trap=zero -fbacktrace -g -Og test.f90

on machine 1 and execute the code, I get what I expect, ie

$ ./test
start

Program received signal SIGFPE: Floating-point exception - erroneous arithmetic operation.

Backtrace for this error:
#0  0x7F2374BEC697
#1  0x7F2374BECCDE
#2  0x7F23740E827F
#3  0x400858 in MAIN__ at test.f90:9

However, when I do the same thing on machine 2, I get only:

$ ./test
start

Why? And what should I do to get the SIGFPE (and other signals) error message on machine 2?

Answer 1

Installing WSL 2 solved the problem.

$ ./test
start

Program received signal SIGFPE: Floating-point exception - erroneous arithmetic operation.

Backtrace for this error:
#0  0x7feab2aee8b0 in ???
#1  0x7feab2aedae3 in ???
#2  0x7feab276883f in ???
        at /build/glibc-vjB4T1/glibc-2.28/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
#3  0x4011fb in test
        at /home/user/test/test.f90:9
#4  0x401299 in main
        at /home/user/test/test.f90:11
Floating point exception