c++ - 内存泄漏——这怎么可能？

Question

以下代码导致内存泄漏:

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>

using namespace std;

int main()
{

    _CrtDumpMemoryLeaks();
    return 0;
}

这怎么可能？我不分配任何内存，我什至不构造任何对象...+

Detected memory leaks!
Dumping objects ->
{168} normal block at 0x006D75D8, 8 bytes long.
 Data: < D      > B8 44 F4 00 00 00 00 00 
{167} normal block at 0x006D7588, 20 bytes long.
 Data: < um  um  um     > 88 75 6D 00 88 75 6D 00 88 75 6D 00 01 01 CD CD 
{166} normal block at 0x006D7538, 20 bytes long.
 Data: < sm  sm  sm     > 10 73 6D 00 A8 73 6D 00 10 73 6D 00 00 00 CD CD 
{165} normal block at 0x006D74E8, 20 bytes long.
 Data: < qm prm  qm     > D8 71 6D 00 70 72 6D 00 D8 71 6D 00 00 00 CD CD 
{164} normal block at 0x006D7498, 20 bytes long.
 Data: <hkm  qm hkm     > 68 6B 6D 00 88 71 6D 00 68 6B 6D 00 00 00 CD CD 
{163} normal block at 0x006D7448, 20 bytes long.
 Data: < jm  km  jm     > 80 6A 6D 00 18 6B 6D 00 80 6A 6D 00 00 00 CD CD 
{162} normal block at 0x006D73F8, 20 bytes long.
 Data: < im 0jm  im     > 98 69 6D 00 30 6A 6D 00 98 69 6D 00 00 00 CD CD 
{161} normal block at 0x006D73A8, 20 bytes long.
 Data: < sm  sm 8um     > 10 73 6D 00 10 73 6D 00 38 75 6D 00 01 00 CD CD 
{160} normal block at 0x006D7360, 8 bytes long.
 Data: <hD      > 68 44 F4 00 00 00 00 00 
{159} normal block at 0x006D7310, 20 bytes long.
 Data: < sm  sm 8um     > A8 73 6D 00 A8 73 6D 00 38 75 6D 00 01 01 CD CD 
{158} normal block at 0x006D72C0, 20 bytes long.
 Data: < im 0jm  im     > 98 69 6D 00 30 6A 6D 00 98 69 6D 00 00 00 CD CD 
{157} normal block at 0x006D7270, 20 bytes long.
 Data: < qm  qm  tm     > D8 71 6D 00 D8 71 6D 00 E8 74 6D 00 01 00 CD CD 
{156} normal block at 0x006D7228, 8 bytes long.
 Data: < D      > 8C 44 F4 00 00 00 00 00 
{155} normal block at 0x006D71D8, 20 bytes long.
 Data: <prm prm  tm     > 70 72 6D 00 70 72 6D 00 E8 74 6D 00 01 01 CD CD 
{154} normal block at 0x006D7188, 20 bytes long.
 Data: <hkm hkm  tm     > 68 6B 6D 00 68 6B 6D 00 98 74 6D 00 01 00 CD CD 
{153} normal block at 0x006D7140, 8 bytes long.
 Data: < D      > CC 44 F4 00 00 00 00 00 
{152} normal block at 0x006D6B68, 20 bytes long.
 Data: < qm  qm  tm     > 88 71 6D 00 88 71 6D 00 98 74 6D 00 01 01 CD CD 
{151} normal block at 0x006D6B18, 20 bytes long.
 Data: < jm  jm Htm     > 80 6A 6D 00 80 6A 6D 00 48 74 6D 00 01 00 CD CD 
{150} normal block at 0x006D6AD0, 8 bytes long.
 Data: <$D      > 24 44 F4 00 00 00 00 00 
{149} normal block at 0x006D6A80, 20 bytes long.
 Data: < km  km Htm     > 18 6B 6D 00 18 6B 6D 00 48 74 6D 00 01 01 CD CD 
{148} normal block at 0x006D6A30, 20 bytes long.
 Data: < rm  im  sm     > C0 72 6D 00 98 69 6D 00 F8 73 6D 00 01 00 CD CD 
{147} normal block at 0x006D69E8, 8 bytes long.
 Data: <DD      > 44 44 F4 00 00 00 00 00 
{146} normal block at 0x006D6998, 20 bytes long.
 Data: < rm 0jm  sm     > C0 72 6D 00 30 6A 6D 00 F8 73 6D 00 01 01 CD CD 
Object dump complete.

编辑:找到了。它是:BOOST 库中的 BOOST_CLASS_EXPORT_GUID 宏(导致内存泄漏)。我用它来连载。

Answer 1

我的通灵调试技巧告诉我，您包含的其中一个 header 利用了导致内存分配(直接或通过副作用)的全局变量。在调用检查泄漏之前不会释放此内存。