Question

我有这个功能：

char *getCharVal(const char *ch, const char *att, size_t size)
{
  CHECK_NULL(ch);
  CHECK_NULL(ch = strstr(ch, att));
  ch += strlen(att);
  char *end = strchr(ch, '"');
  CHECK_NULL(end);
  char *endTag = strstr(ch, ENDTAG);
  CHECK_NULL (endTag);
  if (end > endTag) {
      return NULL;
  }
  size_t valSize = end - ch;
  if (valSize > size) {
      return NULL;
  }
  return g_strndup(ch, valSize);
}

它似乎导致内存泄漏。我想，无论如何我都没有释放mallocated内存。我不知道如何解决这个问题。这里输出来自valgrind：

==9556== 2,996 bytes in 428 blocks are definitely lost in loss record 272 of 301
==9556==    at 0x4A21370: malloc (vg_replace_malloc.c:291)
==9556==    by 0x4B5AA95: g_malloc (in /opt/gnome/lib64/libglib-2.0.so.0.800.6)
==9556==    by 0x4B6CB48: g_strndup (in /opt/gnome/lib64/libglib-2.0.so.0.800.6)
==9556==    by 0x402376: getCharVal (c2.c:244)
==9556==    by 0x403381: processXML (c2.c:408)
==9556==    by 0x4039C6: main (c2.c:558)

Answer 1

g_strndup为字符串分配一块新内存并返回它。完成后，必须在返回的指针上调用g_free()。

例如：

gchar *str = getCharVal(...);
/* use str */
g_free(str)

内存泄漏 - g_strndup

1 个答案: