***glibc检测到***免费():无效下一个大小(快) - 应该工作？

Question

我正在处理一个现有的c项目(sourceforge上的spglib),我在清理了一些数组初始化后遇到了以下问题:

*检测到glibc* tests/spglibtest:free():下一个大小无效(快):0x08ab46e0***

回溯是:

#0  0xb7fe1424 in __kernel_vsyscall ()
#1  0xb5cfdd61 in raise () from /lib/libc.so.6
#2  0xb5cff5ee in abort () from /lib/libc.so.6
#3  0xb5d397ed in ?? () from /lib/libc.so.6
#4  0xb5d3f7b1 in ?? () from /lib/libc.so.6
#5  0xb5d4052b in ?? () from /lib/libc.so.6
#6  0xb5d441cd in free () from /lib/libc.so.6
#7  0xb6681484 in sym_get_multiplicity (cell=0xbfffe1f0, symprec=0.050000000000000003) at /git/xtalopt-public/src/spglib/symmetry.c:168
#8  0xb6680550 in spg_find_primitive (lattice=0xbfffe2a8, position=0x813c6f0, types=0x813c700, num_atom=2, symprec=0.050000000000000003)
    at /git/xtalopt-public/src/spglib/spglib.c:253

错误发生在下面的"免费(反式)"行中:

int sym_get_multiplicity(const Cell *cell, const double symprec)
{
  int i, rc;
  double **trans;
  trans = (double**)malloc(cell->size * sizeof(double*));
  for (i = 0; i < cell->size; i++) {
    trans[i] = (double*)malloc(3 * sizeof(double));
  }

  rc = get_translation(&trans[0][0], identity, cell, symprec);

  for (i = 0; i < cell->size; i++) {
    free(trans[i]);
  }
  free(trans);

  return rc;
}

get_translation将值分配给trans,如下所示:

static int get_translation(double trans[][3], const int rot[3][3], const Cell *cell,
                           const double symprec)
{
...
  for (j = 0; j < 3; j++) {
    trans[num_trans][j] = someDouble;
  }
...
}

在get_translation中写入数组时,Valgrind显示以下内容:

==17929== Invalid write of size 8
==17929==    at 0x56BE8A7: get_translation (symmetry.c:285)
==17929==    by 0x56BE44B: sym_get_multiplicity (symmetry.c:163)
...
==17929==  Address 0x9cb5868 is 0 bytes after a block of size 8 alloc'd
==17929==    at 0x4024918: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==17929==    by 0x56BE3F7: sym_get_multiplicity (symmetry.c:158)
....

这告诉我,它试图在已经分配的内存的末尾写入trans,但是它写入trans [0] [0],而trans是维度[2] [3].这应该有用,AFAIK,任何人都可以看到我失踪的东西吗？

Answer 1

您的类型是错误的,您不能将指针传递给指向数组数组的函数的指针数组(即指向数组的指针).

对于您的签名get_translation,您需要:

double (*trans)[3] = malloc(cell->size * sizeof(double[3]));