C++/qt呼叫dl報錯-有解無憂

//#include "widget.h"



#include <QApplication>



#include<QDebug>

#include<QLibrary>

#include<string>

#include<QString>



#include<windows.h>

using std::string;



#include<QProcess>

#include<QStringList>



//typedef std::string ( *shibei)(string, string ,string ,string ,string); //定義函式指標





//typedef QStringList(*FUN1)(QString dll_Name);





typedef string (CALLBACK* p_shibie)(string model_file, string trained_file, string mean_file,

                                                 string label_file, string image_file);



//typedef bool (CALLBACK* SetKeyBoardHook)(HWND);



HINSTANCE hDLL; // Handle to DLL

p_shibie shibiep; // Function pointer

string str;

//string caffe_exe_path= "classification.exe";

//path +

string path  = "D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/";

string caffe_path =  path + "Myclassification.dll";

string deploy_path= path + "d.p";

string model_path= path + "r.m";

string mean_path= path + "t.b";

string words_path= path + "w.t";

string image_path = path + "1.png";





void test2()

{

    //D:/Qfile/testDll/

    QLibrary mylib("Myclassification.dll");

    if(mylib.load())

    {

        qDebug() << "dllhook加載成功";

        shibiep  = (p_shibie)mylib.resolve("shibie");

        if(shibiep)

        {

            qDebug() << "SetKeyBoardHook加載成功";

            str = shibiep(deploy_path, model_path, mean_path, words_path, image_path);

            qDebug()<<"result:"<<QString::fromStdString(str);



            //bool flag = open((HWND)this->winId());

        }

    }



}





void test()

{

        hDLL = LoadLibrary("Myclassification");//"dllhook"為DLL的檔案名

        if(hDLL != NULL)

        {

            qDebug() << "dllhook加載成功";

            //"SetKeyBoardHook"為動態庫里實作的函式名稱

            shibiep = (p_shibie)GetProcAddress(hDLL, "shibie");

            if(shibiep != NULL)

            {

                qDebug() << "SetKeyBoardHook Success";

                str = (shibiep)(deploy_path, model_path, mean_path, words_path, image_path);

                qDebug()<<"result:"<<QString::fromStdString(str);

            }

            else

            {

                //FreeLibrary(hDLL);

                qDebug()<<"SetKeyBoardHook Fail";

                return;

            }

        }

}







int main(int argc, char *argv[])

{

   // QApplication a(argc, argv);



    test2();



   // test();



    //    Widget w;

//    w.show();

   // return a.exec();



}

一直報錯，路徑換成絕對的和相對都不行。
錯誤提示：

dllhook加載成功

SetKeyBoardHook加載成功

*** Check failure stack trace: ***

21:45:57: 程式例外結束。

請教各位大佬如何解決問題？
dll為caffe的執行函式

.pro檔案為：

QT       += core gui



greaterThan(QT_MAJOR_VERSION, 4): QT += widgets



CONFIG += c++11



DEFINES-= UNICODE



# The following define makes your compiler emit warnings if you use

# any Qt feature that has been marked deprecated (the exact warnings

# depend on your compiler). Please consult the documentation of the

# deprecated API in order to know how to port your code away from it.

DEFINES += QT_DEPRECATED_WARNINGS



# You can also make your code fail to compile if it uses deprecated APIs.

# In order to do so, uncomment the following line.

# You can also select to disable deprecated APIs only up to a certain version of Qt.

#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0



SOURCES += \

    main.cpp \

    widget.cpp



HEADERS += \

    widget.h



FORMS += \

    widget.ui



# Default rules for deployment.

qnx: target.path = /tmp/$${TARGET}/bin

else: unix:!android: target.path = /opt/$${TARGET}/bin

!isEmpty(target.path): INSTALLS += target



#LIBS += -L. -lExcelApI



#LIBS += -L. C:/Users/Admin/Downloads/QTDLL/QTDLL/libcaffe/ \

#        -Myclassification \

#        -gflags



#LIBS += -L. -lMyclassification



INCLUDEPATH += D:/Desktop/OpenCV/64/include

LIBS += D:/Desktop/OpenCV/64/mingw/lib/libopencv_*.a





win32:CONFIG(release, debug|release): LIBS += -L$$PWD/libcaffe/ -lMyclassification

else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/libcaffe/ -lMyclassificationd



INCLUDEPATH += $$PWD/libcaffe

DEPENDPATH += $$PWD/libcaffe





LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/gflags.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_cpp.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_f90cstub.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_fortran.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_hl.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_hl_cpp.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_hl_f90cstub.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_hl_fortran.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/hdf5_tools.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libgcc_s_sjlj-1.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libgflags.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libgfortran-3.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libglog.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libopenblas.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/libquadmath-0.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/lmdb.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_calib3d2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_contrib2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_core2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_features2d2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_ffmpeg2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_flann2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_gpu2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_highgui2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_imgproc2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_legacy2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_ml2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_nonfree2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_objdetect2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_ocl2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_photo2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_stitching2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_superres2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_video2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/opencv_videostab2410.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/szip.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/zlib.dll

LIBS += D:/Qfile/build-testDll-Desktop_Qt_5_14_2_MinGW_32_bit-Release/release/lmdb.dll





#win32:CONFIG(release, debug|release): LIBS += -L$$PWD/libcaffe/ -llmdb

#else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/libcaffe/ -llmdbd



#INCLUDEPATH += $$PWD/libcaffe

#DEPENDPATH += $$PWD/libcaffe

謝謝大佬

uj5u.com熱心網友回復：

dllhook加載成功
SetKeyBoardHook加載成功
*** Check failure stack trace: ***
21:45:57: 程式例外結束。

1、由輸出可以知道是
str = shibiep(deploy_path, model_path, mean_path, words_path, image_path);
這一句報的錯誤。

2、排查點，一個是確認入參是否都ok?? 另一個就得跟進dll 里面具體分析了

uj5u.com熱心網友回復：

我覺得你絕對路徑都有問題的話，就應該去檢查一下你的匹配情況了，是否32位，64位不匹配，是否minW和visual studio版本不匹配。用mingW編譯的和用vs編譯的混用有問題。64位去呼叫32位的dll也會有問題

uj5u.com熱心網友回復：

32位和64位都編譯了試過不行，但是java代碼運行了可以成功呼叫。
路徑換了/、\\、\\\\都還是不行。

主要是沒有dll的源代碼，因此不能追進去調式。

uj5u.com熱心網友回復：

package com.cizon.tec.serve.impl;





import com.cizon.tec.serve.CaffeLoader;

import com.cizon.tec.serve.DistinguishServe;

import com.sun.jna.Library;

import com.sun.jna.Native;



import java.io.BufferedReader;

import java.io.File;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.nio.charset.Charset;





public class CaffeServeImpl implements DistinguishServe {

     String caffe_exe_path= "classification.exe";

     String caffe_path="Myclassification";

     String deploy_path= "d.p";

     String model_path= "r.m";

     String mean_path= "t.b";

     String words_path= "w.t";

    classficationdll Instance=null;

    public CaffeServeImpl(String path){

        caffe_exe_path=path+File.separator+caffe_exe_path;

        caffe_path=path+File.separator+caffe_path;

        deploy_path=path+File.separator+deploy_path;

        model_path=path+File.separator+model_path;

        mean_path=path+File.separator+mean_path;

        words_path=path+File.separator+words_path;

        System.out.println(caffe_path);

        Instance = (classficationdll) Native.loadLibrary(caffe_path, classficationdll.class);

    }

    public CaffeServeImpl(){

        try {

            String path= CaffeLoader.initialize();

            System.out.println(path);

            path=new File(path).getAbsolutePath();

            caffe_exe_path=path+File.separator+caffe_exe_path;

            caffe_path=path+File.separator+caffe_path;

            deploy_path=path+File.separator+deploy_path;

            model_path=path+File.separator+model_path;

            mean_path=path+File.separator+mean_path;

            words_path=path+File.separator+words_path;

            System.out.println("++++++++++++++++++++++"+caffe_path);

            Instance = (classficationdll) Native.loadLibrary(caffe_path, classficationdll.class);

            System.out.println("OKOK");

        } catch (Exception e) {

            e.printStackTrace();

        }

    }



    public  String exeCmd(String commandStr) {

        BufferedReader br = null;

        try {

            commandStr=caffe_exe_path+" "+deploy_path+" "+model_path+" "+mean_path+" "+words_path+" "+commandStr;

            System.out.println(commandStr);

            Process p = Runtime.getRuntime().exec(commandStr);

            br = new BufferedReader(new InputStreamReader(p.getInputStream(),Charset.forName(System.getProperty("file.encoding"))));

            String line = null;

            StringBuilder sb = new StringBuilder();

            while ((line = br.readLine()) != null) {

                sb.append(line);

            }

            return sb.toString();

        } catch (Exception e) {

            e.printStackTrace();

        }

        finally

        {

            if (br != null)

            {

                try {

                    br.close();

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        }

        return "";

    }



    public interface classficationdll extends Library {

        String shibie(String model_file, String trained_file, String mean_file, String label_file, String image_file);

    }



    @Override

    public String distinguish(String path) {

        System.setProperty("jna.encoding","GBK");

        //return exeCmd(path);

      return Instance.shibie(deploy_path,model_path,mean_path,words_path,path);

    }



}

這是java呼叫

uj5u.com熱心網友回復：

你確定你函式的引數是對的？
java的string照理對應的C的引數是const char*而不是std::string

uj5u.com熱心網友回復：

之前，遇到引數是公共型別，比如是 CString、std::string 的，我就很怕，所以一直避免.
因為不同版本的 VC運行時，std::string 可能不同，debug /release 編譯出來的同樣是二進制邊界不同。（也許有相同的，但我沒精力一個一個證明或者證偽，所以極力避開，都用 char* 傳入，或者自寫的類物件指標用來帶回字串或者復雜型別 , 還有就是統一所有開發環境）

而你要作 hook ，那可能那個東西不知道誰、用啥寫的，以及怎么編譯的。。。。

說白了，以這個函式原型，用 VS2010撰寫的dll ，同樣要用 VS2010撰寫的.exe/.dll 去呼叫。debug撰寫的dll，也要用debug撰寫的.exe/.dll去呼叫。這樣肯定沒問題，這樣出問題也是其他原因導致的。

如果沒這個問題，就當我路過。。。

uj5u.com熱心網友回復：

感覺各位的回復，最后我還是放棄了直接使用C++呼叫dll，在qt中可以使用qml呼叫java方法

轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/7729.html

標籤：Qt

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