我正在尝试在 Qt 上使用 SecuGen FDX SDK 创建一个应用程序。我在从读者那里捕捉图像时遇到问题。我可以毫无问题地访问 dll 中的所有功能，除了那些涉及捕获图像的功能。当我在 Qt creator 下调试代码时，我得到以下信息：
ModLoad: 00e60000 00f06000 registrationPlatform.exe
ModLoad: 77580000 776bc000 ntdll.dll
ModLoad: 769f0000 76ac4000 C:\Windows\system32\kernel32.dll
ModLoad: 75920000 7596a000 C:\Windows\system32\KERNELBASE.dll
ModLoad: 10000000 1001f000 D:\software\registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug\debug\SGFPLIB.DLL
ModLoad: 74bd0000 74bd9000 C:\Windows\system32\VERSION.dll
ModLoad: 76810000 768bc000 C:\Windows\system32\msvcrt.dll
ModLoad: 76ec0000 76f89000 C:\Windows\system32\USER32.dll
ModLoad: 77050000 7709e000 C:\Windows\system32\GDI32.dll
ModLoad: 776d0000 776da000 C:\Windows\system32\LPK.dll
ModLoad: 77710000 777ad000 C:\Windows\system32\USP10.dll
ModLoad: 554d0000 5631e000 D:\software\registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug\debug\QtGuid4.dll
ModLoad: 76ad0000 76b4b000 C:\Windows\system32\COMDLG32.dll
ModLoad: 76ff0000 77047000 C:\Windows\system32\SHLWAPI.dll
ModLoad: 74660000 747fe000 C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7600.16385_none_421189da2b7fabfc\COMCTL32.dll
ModLoad: 75b10000 76759000 C:\Windows\system32\SHELL32.dll
ModLoad: 76910000 7699f000 C:\Windows\system32\OLEAUT32.dll
ModLoad: 76d20000 76e7c000 C:\Windows\system32\ole32.dll
ModLoad: 770a0000 77141000 C:\Windows\system32\RPCRT4.dll
ModLoad: 776e0000 776ff000 C:\Windows\system32\IMM32.dll
ModLoad: 76c50000 76d1c000 C:\Windows\system32\MSCTF.dll
ModLoad: 71870000 718a2000 C:\Windows\system32\WINMM.dll
ModLoad: 6f500000 6f551000 C:\Windows\system32\WINSPOOL.DRV
ModLoad: 76770000 76810000 C:\Windows\system32\ADVAPI32.dll
ModLoad: 768f0000 76909000 C:\Windows\SYSTEM32\sechost.dll
ModLoad: 569f0000 56e40000 D:\software\registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug\debug\QtCored4.dll
ModLoad: 76e80000 76eb5000 C:\Windows\system32\WS2_32.dll
ModLoad: 77700000 77706000 C:\Windows\system32\NSI.dll
ModLoad: 66580000 6664b000 C:\Windows\system32\MSVCP110D.dll
ModLoad: 56850000 569eb000 C:\Windows\system32\MSVCR110D.dll
(758.15c): Break instruction exception - code 80000003 (first chance)
eax=00000000 ebx=00000000 ecx=001af55c edx=775c64f4 esi=fffffffe edi=00000000
eip=7761e60e esp=001af578 ebp=001af5a4 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000246
ntdll!LdrpDoDebuggerBreak+0x2c:
7761e60e cc int 3
cdb: Reading initial command '.idle_cmd !qtcreatorcdbext.idle'
Execute when idle: !qtcreatorcdbext.idle
0:000>
<l+t
<l+s
dNOTE: ENGINE SETUP OK
dState changed from EngineSetupRequested(1) to EngineSetupOk(3) [master]
dQUEUE: SETUP INFERIOR
dState changed from EngineSetupOk(3) to InferiorSetupRequested(4) [master]
dQUEUE: SETUP INFERIOR
dCALL: SETUP INFERIOR
<sxn 0x4000001f
<.asm source_line
<!qtcreatorcdbext.pid -t 0
Source options are 1:
1/t - Step/trace by source line
Source options are 5:
1/t - Step/trace by source line
4/s - List source code at prompt
Assembly options: source_line
Qt Creator CDB extension version 0.11 (Qt 5 support) 32 bit built Aug 9 2012.
dTaking notice of pid 1880
dNOTE: INFERIOR SETUP OK
dState changed from InferiorSetupRequested(4) to InferiorSetupOk(6) [master]
dState changed from InferiorSetupOk(6) to EngineRunRequested(7) [master]
dQUEUE: RUN ENGINE
dCALL: RUN ENGINE
<g
dNOTE: ENGINE RUN AND INFERIOR RUN OK
sRunning.
dState changed from EngineRunRequested(7) to InferiorRunOk(11) [master]
ModLoad: 75640000 7568b000 C:\Windows\system32\apphelp.dll
ModLoad: 565f0000 56849000 C:\Windows\AppPatch\AcXtrnal.DLL
FTH: (1880): *** Fault tolerant heap shim applied to current process. This is usually due to previous crashes. ***
ModLoad: 744b0000 744f0000 C:\Windows\system32\uxtheme.dll
ModLoad: 741b0000 741c3000 C:\Windows\system32\dwmapi.dll
ModLoad: 755d0000 755dc000 C:\Windows\system32\CRYPTBASE.dll
("D:/development/Qt/4.8.3-msvc/plugins", "D:/software/registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug/debug")
ModLoad: 00940000 00a30000 D:\software\registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug\debug\Sgfu03m.dll
ModLoad: 6dc90000 6dca1000 C:\Windows\system32\winbio.dll
ModLoad: 75750000 7586c000 C:\Windows\system32\CRYPT32.dll
ModLoad: 75740000 7574c000 C:\Windows\system32\MSASN1.dll
ModLoad: 6da50000 6da81000 C:\Windows\system32\credui.dll
ModLoad: 00270000 00290000 D:\software\registrationPlatform-build-desktop-Qt_4_8_3-msvc__qmake__Debug\debug\sgfpaMX.dll
ModLoad: 750d0000 750e6000 C:\Windows\system32\CRYPTSP.dll
ModLoad: 74ef0000 74f2b000 C:\Windows\system32\rsaenh.dll
ModLoad: 756c0000 756ce000 C:\Windows\system32\RpcRtRemote.dll
ModLoad: 75890000 75914000 C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7600.16385_none_ebf82fc36c758ad5\comctl32.dll
HEAP[registrationPlatform.exe]:
Heap block at 003D3628 modified at 003D3655 past requested size of 25
(758.15c): Break instruction exception - code 80000003 (first chance)
s
sException at 0x77644684, code: 0x80000003: breakpoint, flags=0x0 in ntdll!RtlpBreakPointHeap
eax=003d3628 ebx=003d3655 ecx=775a07ed edx=001ac329 esi=003d3628 edi=00000025
eip=77644684 esp=001ac570 ebp=001ac570 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000202
ntdll!RtlpBreakPointHeap+0x23:
77644684 cc int 3
sInterrupted.
dNOTE: INFERIOR SPONTANEOUS STOP
sStopped.
dState changed from InferiorRunOk(11) to InferiorStopOk(14) [master]
<!qtcreatorcdbext.locals -t 1 -D -c -W 9
导致问题的代码的特定部分如下：
BYTE *buffer = new BYTE(device_info.ImageHeight*device_info.ImageWidth);
DWORD timeout = 10000;
DWORD quality = 30;
if(SGFPM_GetImageEx(g_Fpm, buffer, timeout, NULL, quality) == SGFDX_ERROR_NONE)
{
//draw image
}
delete buffer;