Question

我正在使用Heapusage（替代Valgrind）。当我在主要功能中打印链接列表时，它会导致内存泄漏（在对打印功能进行注释时，就可以了）。我试图找出问题所在，但是打印功能是如此简单，以至于我的堆分析器出现了问题，或者问题如此简单，以至于我找不到它。

typedef struct Point {
  int x, y;
  struct Point *next;
} Point;

Point *NewPoint(const int x, const int y, Point *head) {
  Point *point = (Point *)malloc(sizeof(Point));
  point->next = NULL;
  point->x = x;
  point->y = y;
  if (head == NULL) {
    head = point;
  } else {
    Point *current = head;
    while (current->next != NULL) {
      current = current->next;
    }
    current->next = point;
  }
  return head;
}

void FreeList(Point *head) {
  Point *current = head;
  while (current != NULL) {
    Point *tmp = current;
    current = current->next;
    free(tmp);
  }
}

void PrintList(Point *head) {
  while (head) {
    printf("[%d, %d]\n", head->x, head->y);
    head = head->next;
  }
}

int main() {
  Point *head = NULL;
  head = NewPoint(2, 3, head);
  PrintList(head);
  FreeList(head);
  return 0;
}

Answer 1

您没有泄漏，已通过valgrind-3.14.0.GIT测试

==13568== Memcheck, a memory error detector
==13568== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==13568== Using Valgrind-3.14.0.GIT and LibVEX; rerun with -h for copyright info
==13568== Command: ./a.out
==13568==  [2, 3]
==13568== 
==13568== HEAP SUMMARY:
==13568==     in use at exit: 0 bytes in 0 blocks
==13568==   total heap usage: 2 allocs, 2 frees, 1,040 bytes allocated
==13568== 
==13568== All heap blocks were freed -- no leaks are possible
==13568== 
==13568== For counts of detected and suppressed errors, rerun with: -v
==13568== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

打印C链表会导致内存泄漏

1 个答案: