[微软工具][内存溢出] LeakDiag & LDGrapher & LeakDiagAutoLog - 适用于 release后期压力测试

参考资料
http://download.csdn.net/download/BlueMap/2518291
http://www.cppblog.com/sandy/archive/2008/08/18/59260.html
http://www.codeproject.com/Articles/108529/LeakDiag-An-Effective-Memory-Leak-Analysis-Tool

写一个定时抓log的AP:LeakDiagAutoLog.exe

BOOL CLeakDiagAutoLogDlg::DoAutoLogging()
{
    CString strData;
    m_pMsgEdit->GetWindowText(strData);

    HWND m_pHwnd = ::FindWindow(NULL, _T("LeakDiag"));
    if (m_pHwnd != NULL)
    {
        HWND m_pHwnLogBtnCtrl = ::FindWindowEx(m_pHwnd, NULL, _T("Button"), _T("Log"));
        if (m_pHwnLogBtnCtrl != NULL)
        {
            long id = ::GetDlgCtrlID(m_pHwnLogBtnCtrl);
            ::PostMessage(m_pHwnd, WM_COMMAND, MAKELONG(id, BN_CLICKED), NULL);
        }
        else
        {
            strData += _T("m_pHwnLogBtnCtrl is NULL\r\n");
            m_pMsgEdit->SetWindowText(strData);

            return FALSE;
        }
    }
    else
    {
        strData += _T("m_pHwnd is NULL!\r\n");
        m_pMsgEdit->SetWindowText(strData);

        return FALSE;
    }

    return TRUE;

//     HWND m_pHwnStartControl = ::FindWindowEx(m_pHwnd, NULL, _T("Button"), _T("Start"));
//     ASSERT(m_pHwnStartControl != NULL);
//     long id = ::GetDlgCtrlID(m_pHwnStartControl);
//     ::PostMessage(m_pHwnd, WM_COMMAND, MAKELONG(id,BN_CLICKED), NULL);
}

void CLeakDiagAutoLogDlg::OnBnClickedRunBtn()
{
    // TODO: Add your control notification handler code here
    UpdateData(TRUE);
    if (0 == m_dwTimeSpan)
    {
        m_dwTimeSpan =1;
    }

    CEdit* pEdit = static_cast<CEdit*>(GetDlgItem(IDC_RUN_BTN));

    if (!m_bTimer)
    {
        SetTimer(1, UINT(m_dwTimeSpan*1000), NULL);
        m_bTimer = TRUE;
        pEdit->SetWindowText(_T("Stop"));
    }
    else
    {
        KillTimer(1);
        m_bTimer = FALSE;
        pEdit->SetWindowText(_T("Start"));
    }

    UpdateData(FALSE);
}

void CLeakDiagAutoLogDlg::OnTimer(UINT_PTR nIDEvent)
{
    // TODO: Add your message handler code here and/or call default
    CTime cTime =  CTime::GetCurrentTime(); 
    CString strTime = cTime.Format("[%Y-%m-%d %H:%M:%S] ");//display YYYY:MM:DD HH:MM:SS

    switch (nIDEvent)
    {
    case 1:
        {
            if (DoAutoLogging())
            {
                CString strData;
                CString strTemp;
                strTemp.Format("[RUN = %ld] DoAutoLogging",  ++m_dwTotalRun);

                m_pMsgEdit->GetWindowText(strData);
                strData += strTime;
                strData += strTemp;
                strData += "\r\n";
                m_pMsgEdit->SetWindowText(strData);
            }

            break;
        }
    case 2:
    default:
        {
            break;
        }
    }

    CDialog::OnTimer(nIDEvent);
}

LeakDiag使用手记

1.在IDE工程选项里面配置Release版本也生成调试信息，发布时，将pdb文件和exe文件一起发布。

2.程序运行后，打开LeakDiag，设置Symbol path

3.定期Log下目标进程的内存分配情况，通过LDGraph打印分配增长情况，来发现内存泄漏

优点：同hookapi方法，非侵入式修改，无需做任何代码改动。跟踪全面。可视化分析堆栈一览无余！

    缺点：对性能有影响，hook分配加锁，遍历堆栈。但是不会占用目标进程的自身内存。




安装好，默认是在c:\leakdiag

然后写一个测试程序来测试

#include <stdio.h>
#include <windows.h>

int main()
{
    while(1)
    {
        char *c = new char[10];
        printf("%s",c);
        Sleep(1000);
    }
    return 0;
}

在LeakDiag中选择aaa.exe
然后选择Windows Heap Allocator来跟踪heap的使用，按start开始，等一会按log，然后再stop
会在c:\leakdiag\Logs下面生成一个log

关键的部分是

<LEAKS ver="1.25.28.2201">
<STACK numallocs="05" size="048" totalsize="0240">
<STACKSTATS>
<SIZESTAT size="048" numallocs="05"/>
<HEAPSTAT handle="340000" numallocs="05"/>
</STACKSTATS>
<FRAME num="0" dll="aaa.exe" function="" filename="" line="" addr="0x407a72" offset="0x00007A72" />
<FRAME num="1" dll="aaa.exe" function="" filename="" line="" addr="0x402ff2" offset="0x00002FF2" />
<FRAME num="2" dll="aaa.exe" function="" filename="" line="" addr="0x402df9" offset="0x00002DF9" />
<FRAME num="3" dll="aaa.exe" function="" filename="" line="" addr="0x402dd6" offset="0x00002DD6" />
<FRAME num="4" dll="aaa.exe" function="" filename="" line="" addr="0x40112f" offset="0x0000112F" />
<FRAME num="5" dll="aaa.exe" function="" filename="" line="" addr="0x401038" offset="0x00001038" />
<FRAME num="6" dll="aaa.exe" function="" filename="" line="" addr="0x401269" offset="0x00001269" />
<FRAME num="7" dll="KERNEL32.dll" function ="GetSortTablesFileInfo" offset="0xC" filename="" line="" addr="0x7C5989D5" />
<STACKID>00524008</STACKID>
</STACK>
</LEAKS>

其中numallocs是分配的次数,size是每次分配的大小，frame则是leak的时候的call stack
这里的stack只显示了binary,是因为symbol没有配好

把对应的pdb文件路径加到[Tools]-[Option]-Symbol search path，就能得到

<LEAKS ver="1.25.28.2201">
<STACK numallocs="06" size="048" totalsize="0288">
<STACKSTATS>
<SIZESTAT size="048" numallocs="06"/>
<HEAPSTAT handle="340000" numallocs="06"/>
</STACKSTATS>
<FRAME num="0" dll="aaa.exe" function ="_heap_alloc_base" offset="0xC2" filename="malloc.c" line="200" addr="0x407A72" />
<FRAME num="1" dll="aaa.exe" function ="_heap_alloc_dbg" offset="0x1A2" filename="dbgheap.c" line="378" addr="0x402FF2" />
<FRAME num="2" dll="aaa.exe" function ="_nh_malloc_dbg" offset="0x19" filename="dbgheap.c" line="248" addr="0x402DF9" />
<FRAME num="3" dll="aaa.exe" function ="_nh_malloc" offset="0x16" filename="dbgheap.c" line="197" addr="0x402DD6" />
<FRAME num="4" dll="aaa.exe" function ="operator new" offset="0xF" filename="new.cpp" line="24" addr="0x40112F" />
<FRAME num="5" dll="aaa.exe" function ="main" offset="0x28" filename="D:\Test\aaa\test.cpp" line="8" addr="0x401038" />
<FRAME num="6" dll="aaa.exe" function ="mainCRTStartup" offset="0xE9" filename="crt0.c" line="206" addr="0x401269" />
<STACKID>00524008</STACKID>
</STACK>
</LEAKS>

由test.cpp line 8引起的memory leak.