C++ Valgrind显示出比allocs更多的自由度

我在我的程序上运行了valgrind，它没有返回内存泄漏。然而，它显示出比allocs更多的自由度，我不知道为什么

提前谢谢

==4234== HEAP SUMMARY:
==4234==     in use at exit: 0 bytes in 0 blocks
==4234==   total heap usage: 304 allocs, 542 frees, 81,820 bytes allocated
==4234== 
==4234== All heap blocks were freed -- no leaks are possible
==4234== 
==4234== For counts of detected and suppressed errors, rerun with: -v
==4234== Use --track-origins=yes to see where uninitialised values come from
==4234== ERROR SUMMARY: 3555 errors from 13 contexts (suppressed: 0 from 0)

---

您可以使用

--trace malloc=yes

选项检查分配的地址。我建议不要在大型应用程序上使用它

例如，使用这个小应用程序

int main()
{
   int* pi = new int;
   delete pi;
}

我明白了

几张便条

您可能希望运行

valgrind

而不是

vg in-place

，除非您自己正在构建valgrind

函数名已损坏。如果要查看未损坏的名称，可以运行

---

如果您希望我们帮助查找此问题的原因，您需要至少显示一些代码！可能是在计算nullptr值的释放量。@AdrianMole我只是不知道是哪部分代码引起的，valgrind没有向我提供它有问题的那行代码with@1201ProgramAlarm这会导致我的程序在将来出现问题吗？释放空指针是可以的，不会导致任何问题。

paulf> ./vg-in-place --trace-malloc=yes ../vg_examples/noleak
==88971== Memcheck, a memory error detector
==88971== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==88971== Using Valgrind-3.16.0.GIT and LibVEX; rerun with -h for copyright info
==88971== Command: ../vg_examples/noleak
==88971== 
--88971-- _Znwm(4) = 0x5800040
--88971-- _ZdlPv(0x5800040)
==88971== 
==88971== HEAP SUMMARY:
==88971==     in use at exit: 0 bytes in 0 blocks
==88971==   total heap usage: 1 allocs, 1 frees, 4 bytes allocated
==88971== 
==88971== All heap blocks were freed -- no leaks are possible
==88971== 
==88971== For lists of detected and suppressed errors, rerun with: -s
==88971== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

paulf>  ./vg-in-place --trace-malloc=yes ../vg_examples/noleak 2>&1 | /usr/bin/c++filt 

[snip]

--89034-- operator new(unsigned long)(4) = 0x5800040
--89034-- operator delete(void*)(0x5800040)