multithreading - QThread使程序崩溃？

我实现了这样的QThread，但是在运行时让程序崩溃了。我已经搜索并看到帖子说，这不是使用QThread的正确方法。 但是我找不到程序崩溃的任何原因，我所做的只是触发“on_Create_triggered()”，我保证互斥锁已正确锁定和解锁。我已经对该程序进行了两天的测试(仅通过'std::cerr What I guess is that the thread may wait for the lock too long and cause program to crash.(听起来不合理...):) 我的代码:后台class Background : public QThread{ Q_OBJECTpublic: Background(int& val,DEVMAP& map, QQueue<LogInfoItem*>& queue, QList<DEV*>& devlist, QList<IconLabel*>& icllist,QMutex& m) :val_i(val),DevMap(map), LogInfoQueue(queue), DevInfoList(devlist), IconLabelList(icllist),mutex(m) {} ~Background();protected: void run(void);private: DEVMAP& DevMap; QQueue<LogInfoItem*>&LogInfoQueue; QList<DEV*>& DevInfoList; QList<IconLabel*>& IconLabelList; int& val_i; QMutex& mutex; void rcv();};Background.cpp#include "background.h"Background::~Background(){ LogFile->close();}void Background::run(void){ initFile(); while(1) { msleep(5); rcv(); }}void Background::rcv(){ mutex.lock(); ... ...//access DevMap, LogInfoQueue, DevInfoList, IconLabelList and val_i; ... mutex.unlock();}MainWindow:(MainWindow具有Background *作为属性)void MainWindow::initThread(){ back = new Background(val_i, dev_map, logDisplayQueue, devInfoList, iconLabelList, mutex); back->start();}void MainWindow::on_Create_triggered(){ mutex.lock(); ... ...//access DevMap, LogInfoQueue, DevInfoList, IconLabelList and val_i; ... mutex.unlock();} (adsbygoogle = window.adsbygoogle || []).push({}); 最佳答案 我已经找到了原因，这更加微妙。(我使用其他人编写的一些代码，但相信它没有坏，我完全错了!:))损坏的代码:#define DATABUFLEN 96typedef struct Para//totally 100bytes{ UINT8 type; UINT8 len; UINT8 inType; UINT8 inLen; UINT8 value[DATABUFLEN];//96 bytes here}ERRORTLV;class BitState{public: UINT8 dataBuf[DATABUFLEN]; ......};和使用它的功能:bool BitState::rcvData() //the function crosses bound of array{ UINT8 data[12] = { 0x72, 0x0A, 0x97, 0x08, 0x06, 0x0A, 0x0C, 0x0F, 0x1E, 0x2A, 0x50, 0x5F, }; //only 12 bytes UINT32 dataLen = 110; memcpy(this->dataBuf, data, dataLen); //copy 110 bytes to dataBuf //but no error or warning from compiler, and no runtime error indicates the cross}bool BitState::parseData(BitLog* bitLog)//pass pointer of dataBuf to para_tmp, but only use 0x08 + 4 = 12 bytes of dataBuf{ Para* para_tmp; if(*(this->dataBuf) == 0x77) { para_tmp = (ERRORTLV*)this->dataBuf; } if(para_tmp->type != 0x72 || para_tmp->inType != 0x97 || (para_tmp->len - para_tmp->inLen) != 2) // inLen == 0x08 { return false; } else { //parse dataBuf according to Para's structure this->bitState.reset(); for(int i = 0; i < para_tmp->inLen; i++) // inLen == 0x08 only !!! { this->bitState[para_tmp->value[i]-6] = 1; } if(this->bitState.none()) this->setState(NORMAL); else this->setState(FAULT); QString currentTime = (QDateTime::currentDateTime()).toString("yyyy.MM.dd hh:mm:ss.zzz"); string sysTime = string((const char *)currentTime.toLocal8Bit()); this->setCurTime(sysTime); this->addLog(sysTime, bitLog); } return true;}bool BitState::addLog(std::string sysTime, BitLog* bitLog)// this function is right{ bitLog->basicInfo = this->basicInfo;//not in data Buf, already allocated and initialized, (right) bitLog->bitState = this->bitState; //state is set by setState(..) bitLog->rcvTime = sysTime; //time return true;} 通常来说，该程序将96个字节分配给一个字节数组，但是使用'memcpy(...)'将110个字节复制到该数组，以后仅使用该数组的12个字节。 出现各种崩溃，这令人困惑和沮丧... :( :( :( (adsbygoogle = window.adsbygoogle || []).push({});