1: static char help[] = "Tests catching of floating point exceptions.\n\n"; 3: #include <petscsys.h> 5: PetscErrorCode CreateError(PetscReal x) 6: { 7: PetscFunctionBegin; 8: x = 1.0 / x; 9: PetscCall(PetscPrintf(PETSC_COMM_SELF, "x = %g\n", (double)x)); 10: PetscFunctionReturn(PETSC_SUCCESS); 11: } 13: int main(int argc, char **argv) 14: { 15: PetscFunctionBeginUser; 16: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 17: PetscCall(PetscPrintf(PETSC_COMM_SELF, "This is a contrived example to test floating pointing\n")); 18: PetscCall(PetscPrintf(PETSC_COMM_SELF, "It is not a true error.\n")); 19: PetscCall(PetscPrintf(PETSC_COMM_SELF, "Run with -fp_trap to catch the floating point error\n")); 20: PetscCall(CreateError(0.0)); 21: return 0; 22: } 24: /* 26: Because this example may produce different output on different machines we filter out everything. 27: This makes the test ineffective but currently we don't have a good way to know which machines should handle 28: the floating point exceptions properly. 30: */ 31: /*TEST 33: test: 34: args: -fp_trap -error_output_stdout 35: filter: Error: true 37: TEST*/