valgrind没有捕获明显失去的记忆

Question

我之前使用过valgrind，它非常有帮助。我最近设置了一个开发环境并再次开始使用valgrind。这次它发现没有丢失的记忆！即使我使用CTRL-C对某些内存进行malloc然后中断，我也会获得下面的转储。有人可以解释发生了什么吗？

...困惑

==2489== HEAP SUMMARY:
==2489==     in use at exit: 314,145 bytes in 585 blocks
==2489==   total heap usage: 1,410 allocs, 825 frees, 2,025,829 bytes allocated
==2489== 
==2489== LEAK SUMMARY:
==2489==    definitely lost: 0 bytes in 0 blocks
==2489==    indirectly lost: 0 bytes in 0 blocks
==2489==      possibly lost: 0 bytes in 0 blocks
==2489==    still reachable: 314,145 bytes in 585 blocks
==2489==         suppressed: 0 bytes in 0 blocks
==2489== Reachable blocks (those to which a pointer was found) are not shown.
==2489== To see them, rerun with: --leak-check=full --show-reachable=yes
==2489== 
==2489== For counts of detected and suppressed errors, rerun with: -v
==2489== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 6 from 6)

Answer 1

如果仍有指向malloc内存的指针，则不是泄漏。它在摘要中显示为仍然可以访问。

不是free ed的内存如果仍处于活动状态，则不一定会泄露，也就是说，某处（全局，堆栈或寄存器）仍有指向它的指针。