C++函数调用引发内存错误

C++调用函数莫名错误，用debug模式程序正常，release模式程序卡在一个函数中，如果不调用这个函数，程序正常结束，但调用这个函数就内存错误，就算函数为空也会这样。会是什么原因呢。用到了opencv库

存在数组越界或者野指针之类的错误，因为debug模式，内存使用比较宽松，当你越界一点，并不破坏别的变量，导致问题比较隐蔽，没有暴露。

不知道你这个问题是否已经解决, 如果还没有解决的话:

• 这有个类似的问题, 你可以参考下: https://ask.csdn.net/questions/7504105
• 除此之外, 这篇博客: C++常用方法笔记资料中的 C++和OpenCV的Debug文件 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

  Debug.h:

  #ifndef DETECT_DEBUG_H
  #define DETECT_DEBUG_H
  #include "opencv2/opencv.hpp"
  #include <chrono>
  
  #define  millisecond 1000000
  
  using namespace std;
  //debug info ON-OFF
  #define __DEBUG__ON
  #ifdef  __DEBUG__ON
  #define __DEBUG__WIN__ON         //Window debug:print debug info
  #define __DEBUG__IMSHOW__ON       //show debug images
  #define __DEBUG__IMWRITE__OFF       //write debug images
  #define __DEBUG__TIME__ON          //run times test on/off
  #define __DEBUG__ANDROID__OFF     //android debug on/off
  
  //#include <assert.h> 
  //#define DEBUG_ASSERT(...) assert( __VA_ARGS__)
  //#define DEBUG_CV_ASSERT(...) CV_Assert( __VA_ARGS__)
  
  #else
  #define __DEBUG__ON(format,...)
  #endif
  
  //print debug info
  #ifdef  __DEBUG__WIN__ON
  //#define DEBUG_PRINT(...) printf("File: %s, Line: %05d: "format"", __FILE__,__LINE__, ##__VA_ARGS__)
  #define DEBUG_PRINT(...) printf( __VA_ARGS__);printf("\n")
  #else
  #define DEBUG_PRINT(format,...)
  #endif
  
  
  
  //show debug images
  #ifdef  __DEBUG__IMSHOW__ON
  #define DEBUG_IMSHOW(...) showImages(__VA_ARGS__)
  #else
  #define DEBUG_IMSHOW(format,...) 
  #endif
  
  //write debug images
  #ifdef  __DEBUG__IMWRITE__ON
  #define DEBUG_IMWRITE(...) saveImage(__VA_ARGS__)
  #else
  #define DEBUG_IMWRITE(format,...) 
  #endif
  
  //write debug images
  #ifdef  __DEBUG__ANDROID__ON
  #include <android/log.h>
  // Define the LOGI and others for print debug infomation like the log.i in java
  #define LOG_TAG    "SmartAlbum -- JNILOG"
  //#undef LOG
  #define LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG, __VA_ARGS__)
  #define LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG, __VA_ARGS__)
  #define LOGW(...)  __android_log_print(ANDROID_LOG_WARN,LOG_TAG, __VA_ARGS__)
  #define LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG, __VA_ARGS__)
  #define LOGF(...)  __android_log_print(ANDROID_LOG_FATAL,LOG_TAG, __VA_ARGS__)
  #else
  #ifdef __DEBUG__WIN__ON
  #define LOGI(...)  printf( __VA_ARGS__); printf("\n")
  #define LOGD(...)  printf( __VA_ARGS__); printf("\n")
  #define LOGW(...)  printf( __VA_ARGS__); printf("\n")
  #define LOGE(...)  printf( __VA_ARGS__); printf("\n")
  #define LOGF(...)  printf( __VA_ARGS__); printf("\n")
  #else
  #define LOGI(...)   
  #define LOGD(...)   
  #define LOGW(...)   
  #define LOGE(...)   
  #define LOGF(...)  
  #endif
  #endif
  
  //run times test...
  #ifdef  __DEBUG__TIME__ON
  #define LOG_TIME  LOGE
  #define RUN_TIME(time_)  (double)(time_).count()/millisecond
  //#define RUN_TIME(...)  getTime_MS( __VA_ARGS__)
  
  //设置计算运行时间的宏定义
  #define DEBUG_TIME(time_) auto time_ =std::chrono::high_resolution_clock::now()
  #define DEBUG_TIME_PRINT(time_) printf("run time: %s=%3.3f ms\n", #time_,(double)(time_).count()/millisecond) 
  #else
  #define DEBUG_TIME(time_)
  #endif
  
  template<typename TYPE>
  void PRINT_1D(string name,TYPE *p1, int len) {
  	printf("%s", name.c_str());
  	for (int i = 0; i < len; i++) {
  		printf("%f,", p1[i]);
  	}
  	cout << endl;
  }
  
  
  void showImages(const char *imageName, cv::Mat image);
  void showImages(const char *imageName, cv::Mat img, cv::Rect face);
  void showImages(const char *imageName, cv::Mat img, cv::Rect face, std::vector<cv::Point> pts);
  void showImages(const char *imageName, cv::Mat img, std::vector<cv::Point> pts);
  
  
  
  
  void saveImage(const char *imageName, cv::Mat image);
  void saveImage(const char *imageName, cv::Mat image, std::vector<int> para);
  void saveImage(const char *imageName, cv::Mat image, cv::Rect face, std::vector<cv::Point> pts);
  void saveImage(const char *imageName, cv::Mat img, cv::Rect face);
  
  vector<string> getFilesList(string dir);
  void writeDatatxt(string path, string data, bool bCover=false);
  
  #ifdef linux  
  
  #define _LINUX
  #define separator "/"
  
  #endif  
  
  #ifdef _WIN32//__WINDOWS_  
  
  #define _WINDOWS
  #define separator  "\\"
  #endif
  
  
  #endif

  Debug.cpp:

  #include "opencv2/opencv.hpp"
  using namespace std;
  #include "debug.h"
  
  
  //*************************************显示图片****************************************
  #define RESIZE(img_show,col)  cv::resize(img_show, img_show, cv::Size(col, img_show.rows*col / img_show.cols))
  
  void showImages(const char *imageName, cv::Mat img) {
  	cv::Mat img_show = img.clone();
  	if (img_show.channels() == 1)
  		cvtColor(img_show, img_show, cv::COLOR_GRAY2BGR);
  
  	//char str[200];
  	char str1[200];
  	strcpy(str1, imageName);
  	//sprintf(str, ",Size:%dx%d", image.rows, image.cols);
  	//strcat(str1, str);
  	RESIZE(img_show, 400);
  	cv::imshow(str1, img_show);
  	cv::waitKey(100);
  }
  
  
  void showImages(const char *imageName, cv::Mat img, cv::Rect face, std::vector<cv::Point> pts)
  {
  	cv::Mat img_show = img.clone();
  	if (img_show.channels() == 1)
  		cvtColor(img_show, img_show, cv::COLOR_GRAY2BGR);
  
  	for (int i = 0; i < pts.size(); ++i) {
  		//std::cout << "index: " << i << std::endl;
  		cv::circle(img_show, pts.at(i), 2.f, cv::Scalar(0, 0, 255), -1, CV_AA);
  		//		char str[3];
  		//		itoa(i, str, 10);
  		//		//line(imgDrawFace, cv::Point(shape.part(i).x(), shape.part(i).y()), cv::Point(shape.part(i).x(), shape.part(i).y()), cv::Scalar(0, i * 3, 255), 2);
  		//		putText(img_show, str, pts.at(i), cv::FONT_HERSHEY_DUPLEX, 0.5, cv::Scalar(255, 0, 0));
  
  	}
  	cv::rectangle(img_show, face, { 255, 0, 0 }, 2);
  	char str[200];
  	char str1[200];
  	strcpy(str1, imageName);
  	//sprintf(str, ",Size:%dx%d", img.rows, img.cols);
  	//strcat(str1, str);
  	RESIZE(img_show, 400);
  	cv::imshow(str1, img_show);
  	cv::waitKey(100);
  }
  
  
  void showImages(const char *imageName, cv::Mat img, std::vector<cv::Point> pts)
  {
  	cv::Mat img_show = img.clone();
  	if (img_show.channels() == 1)
  		cvtColor(img_show, img_show, cv::COLOR_GRAY2BGR);
  
  	for (int i = 0; i < pts.size(); ++i) {
  		//std::cout << "index: " << i << std::endl;
  		cv::circle(img_show, pts.at(i), 2.f, cv::Scalar(0, 0, 255), -1, CV_AA);
  		//		char str[3];
  		//		itoa(i, str, 10);
  		//		//line(imgDrawFace, cv::Point(shape.part(i).x(), shape.part(i).y()), cv::Point(shape.part(i).x(), shape.part(i).y()), cv::Scalar(0, i * 3, 255), 2);
  		//		putText(img_show, str, pts.at(i), cv::FONT_HERSHEY_DUPLEX, 0.5, cv::Scalar(255, 0, 0));
  	}
  	char str[200];
  	char str1[200];
  	strcpy(str1, imageName);
  	//sprintf(str, ",Size:%dx%d", img.rows, img.cols);
  	//strcat(str1, str);
  	RESIZE(img_show, 400);
  	cv::imshow(str1, img_show);
  	cv::waitKey(100);
  }
  
  
  
  void showImages(const char *imageName, cv::Mat img, cv::Rect face)
  {
  	int thickness = img.cols*0.005;
  	thickness = thickness > 1 ? thickness : 1;
  	cv::Mat img_show = img.clone();
  	if (img_show.channels() == 1)
  		cvtColor(img_show, img_show, cv::COLOR_GRAY2BGR);
  
  	cv::rectangle(img_show, face, { 255, 0, 0 }, thickness);
  	char str[200];
  	char str1[200];
  	strcpy(str1, imageName);
  	//sprintf(str, ",Size:%dx%d", img.rows, img.cols);
  	//strcat(str1, str);
  	RESIZE(img_show, 400);
  	cv::imshow(str1, img_show);
  	cv::waitKey(100);
  }
  
  //*************************************保存图片****************************************
  
  
  void saveImage(const char *imageName, cv::Mat image) {
  	cv::imwrite(imageName, image);
  }
  
  void saveImage(const char *imageName, cv::Mat image, std::vector<int> para) {
  	cv::imwrite(imageName, image, para);
  }
  
  void saveImage(const char *imageName, cv::Mat image, cv::Rect face, std::vector<cv::Point> pts) {
  	int thickness = image.cols*0.005;
  	thickness = thickness > 1 ? thickness : 1;
  	cv::Mat img = image.clone();
  	for (int i = 0; i < pts.size(); ++i) {
  		//std::cout << "index: " << i << std::endl;
  		cv::circle(img, pts.at(i), 2.f, cv::Scalar(0, 0, 255), thickness, CV_AA);
  	}
  	cv::rectangle(img, face, { 255, 0, 0 }, thickness);
  	cv::imwrite(imageName, img);
  }
  
  void saveImage(const char *imageName, cv::Mat img, cv::Rect face)
  {
  	cv::Mat img_show = img.clone();
  	if (img_show.channels() == 1)
  		cvtColor(img_show, img_show, cv::COLOR_GRAY2BGR);
  	cv::rectangle(img_show, face, { 255, 0, 0 }, 2);
  	cv::imwrite(imageName, img_show);
  }
  
  
  //*************************************获取文件列表****************************************
  #ifdef _LINUX  
  #include <memory.h>  
  #include <dirent.h>  
  vector<string> getFilesList(string dirpath) {
  	vector<string> allPath;
  	DIR *dir = opendir(dirpath.c_str());
  	if (dir == NULL)
  	{
  		cout << "opendir error" << endl;
  		return allPath;
  	}
  	struct dirent *entry;
  	while ((entry = readdir(dir)) != NULL)
  	{
  		if (entry->d_type == DT_DIR) {//It's dir  
  			if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
  				continue;
  			string dirNew = dirpath + separator + entry->d_name;
  			vector<string> tempPath = getFilesList(dirNew);
  			allPath.insert(allPath.end(), tempPath.begin(), tempPath.end());
  
  		}
  		else {
  			//cout << "name = " << entry->d_name << ", len = " << entry->d_reclen << ", entry->d_type = " << (int)entry->d_type << endl;  
  			string name = entry->d_name;
  			string imgdir = dirpath + separator + name;
  			//sprintf("%s",imgdir.c_str());  
  			allPath.push_back(imgdir);
  		}
  
  	}
  	closedir(dir);
  	//system("pause");  
  	return allPath;
  }
  #endif  
  
  #ifdef _WIN32//__WINDOWS_  
  #include <io.h>    
  vector<string> getFilesList(string dir)
  {
  	vector<string> allPath;
  	// 在目录后面加上"\\*.*"进行第一次搜索  
  	string dir2 = dir + separator+"*.*";
  
  	intptr_t handle;
  	_finddata_t findData;
  
  	handle = _findfirst(dir2.c_str(), &findData);
  	if (handle == -1) {// 检查是否成功  
  		cout << "can not found the file ... " << endl;
  		return allPath;
  	}
  	while (_findnext(handle, &findData) == 0)
  	{
  		if (findData.attrib & _A_SUBDIR)//// 是否含有子目录  
  		{
  			//若该子目录为"."或".."，则进行下一次循环，否则输出子目录名，并进入下一次搜索  
  			if (strcmp(findData.name, ".") == 0 || strcmp(findData.name, "..") == 0)
  				continue;
  			// 在目录后面加上"\\"和搜索到的目录名进行下一次搜索  
  			string dirNew = dir + separator + findData.name;
  			vector<string> tempPath = getFilesList(dirNew);
  			allPath.insert(allPath.end(), tempPath.begin(), tempPath.end());
  		}
  		else //不是子目录，即是文件，则输出文件名和文件的大小  
  		{
  			string filePath = dir + separator + findData.name;
  			allPath.push_back(filePath);
  		}
  	}
  	_findclose(handle);    // 关闭搜索句柄  
  	return allPath;
  }
  #endif  
  
  //***********************************将数据保存到txt文本中*************************************
  void writeDatatxt(string path, string data, bool bCover) {
  	
  	//fstream fout(path, ios::app);
  	fstream fout;
  	if (bCover)
  	{
  		fout.open(path);//默认是：ios_base::in | ios_base::out
  	}
  	else
  	{
  		fout.open(path, ios::app);//所有写入附加在文件末尾
  	}
  	fout << data << endl;
  	fout.flush();
  	fout.close();
  }
  

  ---

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破案，函数没有写返回值，我去，这个错误第一次遇到好诡异呀。