test/clang-tidy/checkers/mpi-buffer-deref.cpp

// REQUIRES: static-analyzer
// RUN: %check_clang_tidy %s mpi-buffer-deref %t -- -- -I %S/Inputs/mpi-type-mismatch

#include "mpimock.h"

void negativeTests() {
  char *buf;
  MPI_Send(&buf, 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: buffer is insufficiently dereferenced: pointer->pointer [mpi-buffer-deref]

  unsigned **buf2;
  MPI_Send(buf2, 1, MPI_UNSIGNED, 0, 0, MPI_COMM_WORLD);
  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: buffer is insufficiently dereferenced: pointer->pointer

  short buf3[1][1];
  MPI_Send(buf3, 1, MPI_SHORT, 0, 0, MPI_COMM_WORLD);
  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: buffer is insufficiently dereferenced: array->array

  long double _Complex *buf4[1];
  MPI_Send(buf4, 1, MPI_C_LONG_DOUBLE_COMPLEX, 0, 0, MPI_COMM_WORLD);
  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: buffer is insufficiently dereferenced: pointer->array

  std::complex<float> *buf5[1][1];
  MPI_Send(&buf5, 1, MPI_CXX_FLOAT_COMPLEX, 0, 0, MPI_COMM_WORLD);
  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: buffer is insufficiently dereferenced: pointer->array->array->pointer
}

void positiveTests() {
  char buf;
  MPI_Send(&buf, 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);

  unsigned *buf2;
  MPI_Send(buf2, 1, MPI_UNSIGNED, 0, 0, MPI_COMM_WORLD);

  short buf3[1][1];
  MPI_Send(buf3[0], 1, MPI_SHORT, 0, 0, MPI_COMM_WORLD);

  long double _Complex *buf4[1];
  MPI_Send(*buf4, 1, MPI_C_LONG_DOUBLE_COMPLEX, 0, 0, MPI_COMM_WORLD);

  long double _Complex buf5[1];
  MPI_Send(buf5, 1, MPI_C_LONG_DOUBLE_COMPLEX, 0, 0, MPI_COMM_WORLD);

  std::complex<float> *buf6[1][1];
  MPI_Send(*buf6[0], 1, MPI_CXX_FLOAT_COMPLEX, 0, 0, MPI_COMM_WORLD);

  // Referencing an array with '&' is valid, as this also points to the
  // beginning of the array.
  long double _Complex buf7[1];
  MPI_Send(&buf7, 1, MPI_C_LONG_DOUBLE_COMPLEX, 0, 0, MPI_COMM_WORLD);
}