SIGNAL SIGSEGV 错误请教( 凡是带Q_OBJECT就出错 )
我做了一个QThread类线程的测试,有段错误出现,整个程序源码如下:
//main.cpp
#include <qapplication.h>
#include "test.h"
int main( int argc, char ** argv )
{
QApplication a( argc, argv );
Test w;
w.show();
a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
return a.exec();
}
//threadTest.h
#ifndef THREADTEST_H
#define THREADTEST_H
#include <qthread.h>
class MyThread : public QThread
{
protected :
virtual void run();
};
#endif
//threadTest.cpp
#include "threadTest.h"
#include <stdio.h>
void MyThread::run()
{
for(int i=0;i <100;i++)
printf("new value i is:%d",i);
}
//test.ui.h
#include "threadTest.h"
MyThread myThread;
void Test::newSlot()
{
myThread.start();
}
//test.h
#ifndef TEST_H
#define TEST_H
#include <qvariant.h>
#include <qwidget.h>
class QVBoxLayout;
class QHBoxLayout;
class QGridLayout;
class QLineEdit;
class QPushButton;
class QTextEdit;
class Test : public QWidget
{
Q_OBJECT
public:
Test( QWidget* parent = 0, const char* name = 0, WFlags fl = 0 );
~Test();
QTextEdit* textEdit1;
QLineEdit* lineEdit1;
QPushButton* pushButton2;
QPushButton* pushButton1;
public slots:
virtual void newSlot();
protected:
protected slots:
virtual void languageChange();
};
#endif // TEST_H
//test.cpp
#include "test.h"
#include <qvariant.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qtextedit.h>
#include <qlayout.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>
#include "../test.ui.h"
/*
* Constructs a Test as a child of 'parent', with the
* name 'name' and widget flags set to 'f'.
*/
Test::Test( QWidget* parent, const char* name, WFlags fl )
: QWidget( parent, name, fl )
{
if ( !name )
setName( "Test" );
textEdit1 = new QTextEdit( this, "textEdit1" );
textEdit1->setGeometry( QRect( 10, 60, 570, 291 ) );
lineEdit1 = new QLineEdit( this, "lineEdit1" );
lineEdit1->setGeometry( QRect( 10, 360, 571, 31 ) );
pushButton2 = new QPushButton( this, "pushButton2" );
pushButton2->setGeometry( QRect( 380, 400, 201, 41 ) );
pushButton1 = new QPushButton( this, "pushButton1" );
pushButton1->setGeometry( QRect( 10, 10, 261, 41 ) );
languageChange();
resize( QSize(600, 480).expandedTo(minimumSizeHint()) );
// signals and slots connections
connect( pushButton1, SIGNAL( released() ), this, SLOT( newSlot() ) );
}
/*
* Destroys the object and frees any allocated resources
*/
Test::~Test()
{
// no need to delete child widgets, Qt does it all for us
}
/*
* Sets the strings of the subwidgets using the current
* language.
*/
void Test::languageChange()
{
setCaption( tr( "Thread Test" ) );
pushButton2->setText( tr( "pushButton2" ) );
pushButton1->setText( tr( "pushButton1" ) );
}
当程序运行时,按下pushButton1开始运行线程,然后关闭程序时,就会弹出段错误,我用GDB来调试:
Program received signal SIGSEGV,Segmentation fault.
[Switching to Thread 1084948864(LWP 2084)]
0x404f2002 in QMutexPool::get(void *)()from/usr/lib/qt-3.1/lib/libqt-mt.so.3
我的程序里就没有用到QMutexPool,到底是哪里错误了,请高手救命呀
主要是metaobject引用了无效地址，这是为什么，只要有用Q_OBJECT宏定义，moc也正常，编译无措，但是运行就出类似上面的错。
