CI: Add more robust exit testing in GitHub CI

.github/workflows/build.yml

@@ -200,9 +200,6 @@ jobs:
         echo CAF_IMAGES=${CAF_IMAGES}
         set -x
         ./build/run-fpm.sh run --verbose --example hello
-        ./build/run-fpm.sh run --verbose --example stop_with_no_code
-        ( set +e ; ./build/run-fpm.sh run --verbose --example stop_with_integer_code ; test $? = 99 )
-        ( set +e ; ./build/run-fpm.sh run --verbose --example error_stop_with_integer_code ; test $? = 100 )
 
     - name: Run unit tests
       run: |
@@ -214,3 +211,20 @@ jobs:
           CAF_IMAGES=$(( CAF_IMAGES / 2 )) ; \
         done
 
+    - name: Run exit tests
+      run: |
+        echo CAF_IMAGES=${CAF_IMAGES}
+        set -x
+        ./build/run-fpm.sh run --verbose --example stop_with_no_code
+        ( set +e ; ./build/run-fpm.sh run --verbose --example stop_with_integer_code ; test $? = 99 )
+        ( set +e ; ./build/run-fpm.sh run --verbose --example error_stop_with_integer_code ; test $? = 100 )
+        unset GASNET_SPAWN_VERBOSE
+        for ((i=1; i<=4; i++)); do \
+         (set +e ; \
+          ./build/run-fpm.sh run --verbose --example exit_case -- $i 2>&1 | tee output ; \
+          test ${PIPESTATUS[0]} = $((i + 100)) \
+            && grep -q "stdout from image $CAF_IMAGES" output \
+            && grep -q "stderr from image $CAF_IMAGES" output \
+         ) ; \
+        done
+

example/support-test/exit_case.F90

@@ -0,0 +1,48 @@
+program hello_world
+  use iso_c_binding, only: c_bool
+  use iso_fortran_env, only: output_unit,error_unit
+  use prif, only : &
+     prif_init &
+    ,prif_this_image_no_coarray &
+    ,prif_num_images &
+    ,prif_stop &
+    ,prif_error_stop &
+    ,prif_sync_all
+  implicit none
+
+  integer :: init_exit_code, me, num_imgs, exitcase = 1
+  logical(kind=c_bool), parameter :: false = .false._c_bool, true = .true._c_bool
+  character(len=256) :: arg_string
+
+  call prif_init(init_exit_code)
+  if (init_exit_code /= 0) call prif_error_stop(quiet=false, stop_code_char="program startup failed")
+
+  call prif_this_image_no_coarray(this_image=me)
+  call prif_num_images(num_images=num_imgs)
+  if (command_argument_count() > 0) then
+    call get_command_argument(1, arg_string)
+    read(arg_string, *) exitcase
+  end if
+  if (me == 1) write(output_unit,*) "testing exit case ", exitcase
+
+  call prif_sync_all()
+
+  write(output_unit,'(A,I1,A,I1)') "stdout from image ", me, " of ", num_imgs
+  write(error_unit,'(A,I1,A,I1)')  "stderr from image ", me, " of ", num_imgs
+
+  call prif_sync_all()
+
+  select case (exitcase) 
+  case (1)
+    call prif_stop(quiet=true, stop_code_int=exitcase+100)
+  case (2)
+    call prif_stop(quiet=false, stop_code_int=exitcase+100)
+  case (3)
+    if (me == num_imgs) call prif_error_stop(quiet=true, stop_code_int=exitcase+100)
+  case default
+    if (me == num_imgs) call prif_error_stop(quiet=false, stop_code_int=exitcase+100)
+  end select
+
+  call prif_sync_all()
+
+end program