I have interesting combination of warnings & errors.
Firstly, when debugging, i get warnings:
can't find linker symbol for virtual table for `QFile' value
found `WebCore::JSDocument::JSDocument(JSC::Structure*, WebCore::JSDOMGlobalObject*, WTF::PassRefPtr<WebCore::Document>)' instead
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
can't find linker symbol for virtual table for `QFile' value
found `WebCore::JSDocument::JSDocument(JSC::Structure*, WebCore::JSDOMGlobalObject*, WTF::PassRefPtr<WebCore::Document>)' instead
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
RTTI symbol not found for class 'WebCore::JSHTMLDocument'
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secondly, i have runtime error:
QIODevice::open: File access not specified
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and momently
*** glibc detected *** <path>: double free or corruption (out): 0x081f9d00 ***
*** glibc detected *** <path>: double free or corruption (out): 0x081f9d00 ***
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Here's the minimal code that causes that errors:
Files
In result folder created folder "resources" and in it file "vk.cookie" (everything without quotes).
Bug.pro
QT += core gui webkit network xml
TARGET = Bug
TEMPLATE = app
SOURCES += main.cpp \
api_vk.cpp \
printer.cpp
HEADERS += \
api_vk.h \
printer.h
QT += core gui webkit network xml
TARGET = Bug
TEMPLATE = app
SOURCES += main.cpp \
api_vk.cpp \
printer.cpp
HEADERS += \
api_vk.h \
printer.h
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main.cpp
#include <QtGui/QApplication>
#include "api_vk.h"
#include "printer.h"
int main(int argc, char *argv[]) {
API_VK *apivk = new API_VK;
apivk->authorise();
Printer *printer = new Printer;
QObject::connect(apivk,
SIGNAL(authorisationSucceed
()), printer,
SLOT(printOK
()));
return a.exec();
}
#include <QtGui/QApplication>
#include "api_vk.h"
#include "printer.h"
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
API_VK *apivk = new API_VK;
apivk->authorise();
Printer *printer = new Printer;
QObject::connect(apivk, SIGNAL(authorisationSucceed()), printer, SLOT(printOK()));
QObject::connect(apivk, SIGNAL(authorisationFailed(QString,QString)), printer, SLOT(printFail()));
return a.exec();
}
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api_vk.h
#ifndef API_VK_H
#define API_VK_H
#include <QObject>
#include <QTimer>
#include <QUrl>
#include <QtNetwork/QNetworkCookieJar>
class QWebView;
class QNetworkReply;
class QNetworkCookie;
{
Q_OBJECT
public:
explicit API_VK
(QObject *parent
= 0);
signals:
void authorisationSucceed();
public slots:
void authorise();
protected:
void readCookies();
void writeCookies();
protected slots:
void newAuthoriseRequest();
void processUrl
(QUrl url
);
private:
static qint32 expires_in;
QWebView *messagesPage;
QList<QNetworkCookie> cookies;
QNetworkCookieJar jar;
static bool authorised;
};
#endif
#ifndef API_VK_H
#define API_VK_H
#include <QObject>
#include <QTimer>
#include <QUrl>
#include <QtNetwork/QNetworkCookieJar>
class QWebView;
class QString;
class QNetworkReply;
class QXmlInputSource;
class QTimer;
class QNetworkCookie;
class API_VK : public QObject
{
Q_OBJECT
public:
explicit API_VK(QObject *parent = 0);
signals:
void authorisationFailed(QString error, QString error_description);
void authorisationSucceed();
public slots:
void authorise();
protected:
void readCookies();
void writeCookies();
protected slots:
void newAuthoriseRequest();
void processUrl(QUrl url);
private:
static const QString app_id;
static QString access_token;
static qint32 expires_in;
QWebView *messagesPage;
QList<QNetworkCookie> cookies;
QNetworkCookieJar jar;
static bool authorised;
};
#endif
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api_vk.cpp
#include "api_vk.h"
#include <QtGui>
#include <QWebView>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkReply>
#include <QtNetwork/QNetworkCookie>
#include <QtNetwork/QNetworkCookieJar>
#include <QString>
#include <QStringList>
#include <QFile>
#include <QTextStream>
#include <QTimer>
#include <QUrl>
#include <QtXml>
#include <QVariant>
#include <QDateTime>
#include <QDebug>
bool API_VK::authorised = false;
const QString API_VK
::app_id = "2783286";
int API_VK::expires_in = 0;
// defining class methods
{
}
void API_VK::authorise() {
newAuthoriseRequest(); // 1. going here
}
void API_VK::newAuthoriseRequest() {
// gets new access_token
// 2. going here
messagesPage = new QWebView;
readCookies();
jar.
setCookiesFromUrl(cookies,
QUrl("http://vk.com"));
messagesPage->page()->networkAccessManager()->setCookieJar(&jar);
QUrl url
("http://oauth.vk.com/authorize");
url.addQueryItem("client_id", app_id);
url.addQueryItem("scope", "messages");
url.addQueryItem("redirect_uri","http://api.vk.com/blank.html");
url.addQueryItem("display","page");
url.addQueryItem("response_type","token");
messagesPage->load(QNetworkRequest(url));
connect(messagesPage,
SIGNAL(urlChanged
(QUrl)),
this,
SLOT(processUrl
(QUrl)));
messagesPage->show();
}
void API_VK
::processUrl(QUrl url
) { // 3. going here /* firstly we're here when oath.vk.com redirects us to api.vk.com/login...
* in this case we're exiting at 4.
* secondly, user logs in, and api.vk.com/login redirects us back to oath.vk.com,
* where we get access_token, etc
* and when debugging, we start receiving warnings about "can't find linker symbol" secondly, not firstly
*/
// if (!url.hasQueryItem("access_token"))
// return;
/* I commented previous part because most of you doesn't have VK accounts so you can't go
* to the next part of code */
access_token = url.queryItemValue("access_token");
expires_in = url.queryItemValue("expires_in").toInt();
emit authorisationSucceed();
authorised = true;
cookies
= messagesPage
->page
()->networkAccessManager
()->cookieJar
()->cookiesForUrl
(QUrl("http://vk.com"));
messagesPage->deleteLater();
writeCookies();
}
void API_VK::readCookies() {
QFile file("./resouces/vk.cookie");
return;
}
while (!in.atEnd()) {
in >> name >> value;
cookies.append(QNetworkCookie(name, value));
}
}
void API_VK::writeCookies() {
QFile file("./resouces/vk.cookie");
// note: this file exists if (!file.
open(QIODevice::Truncate |
QIODevice::Text)) { // 5. at this line i receive runtime errors return;
}
for (QList<QNetworkCookie>::const_iterator i = cookies.begin(); i != cookies.end(); ++i) {
out << (*i).name() << ' ' << (*i).value() << '\n';
}
}
#include "api_vk.h"
#include <QtGui>
#include <QWebView>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkReply>
#include <QtNetwork/QNetworkCookie>
#include <QtNetwork/QNetworkCookieJar>
#include <QString>
#include <QStringList>
#include <QFile>
#include <QTextStream>
#include <QTimer>
#include <QUrl>
#include <QtXml>
#include <QVariant>
#include <QDateTime>
#include <QDebug>
bool API_VK::authorised = false;
const QString API_VK::app_id = "2783286";
QString API_VK::access_token = "";
int API_VK::expires_in = 0;
// defining class methods
API_VK::API_VK(QObject *parent) :
QObject(parent)
{
}
void API_VK::authorise() {
newAuthoriseRequest(); // 1. going here
}
void API_VK::newAuthoriseRequest() {
// gets new access_token
// 2. going here
messagesPage = new QWebView;
readCookies();
jar.setCookiesFromUrl(cookies, QUrl("http://vk.com"));
messagesPage->page()->networkAccessManager()->setCookieJar(&jar);
QUrl url("http://oauth.vk.com/authorize");
url.addQueryItem("client_id", app_id);
url.addQueryItem("scope", "messages");
url.addQueryItem("redirect_uri","http://api.vk.com/blank.html");
url.addQueryItem("display","page");
url.addQueryItem("response_type","token");
messagesPage->load(QNetworkRequest(url));
connect(messagesPage, SIGNAL(urlChanged(QUrl)), this, SLOT(processUrl(QUrl)));
messagesPage->show();
}
void API_VK::processUrl(QUrl url) { // 3. going here
/* firstly we're here when oath.vk.com redirects us to api.vk.com/login...
* in this case we're exiting at 4.
* secondly, user logs in, and api.vk.com/login redirects us back to oath.vk.com,
* where we get access_token, etc
* and when debugging, we start receiving warnings about "can't find linker symbol" secondly, not firstly
*/
// if (!url.hasQueryItem("access_token"))
// return;
/* I commented previous part because most of you doesn't have VK accounts so you can't go
* to the next part of code */
access_token = url.queryItemValue("access_token");
expires_in = url.queryItemValue("expires_in").toInt();
emit authorisationSucceed();
authorised = true;
cookies = messagesPage->page()->networkAccessManager()->cookieJar()->cookiesForUrl(QUrl("http://vk.com"));
messagesPage->deleteLater();
writeCookies();
}
void API_VK::readCookies() {
QFile file("./resouces/vk.cookie");
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
return;
}
QTextStream in(&file);
QByteArray name, value;
while (!in.atEnd()) {
in >> name >> value;
cookies.append(QNetworkCookie(name, value));
}
}
void API_VK::writeCookies() {
QFile file("./resouces/vk.cookie"); // note: this file exists
if (!file.open(QIODevice::Truncate | QIODevice::Text)) { // 5. at this line i receive runtime errors
return;
}
QTextStream out(&file);
for (QList<QNetworkCookie>::const_iterator i = cookies.begin(); i != cookies.end(); ++i) {
out << (*i).name() << ' ' << (*i).value() << '\n';
}
}
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printer.h
#ifndef PRINTER_H
#define PRINTER_H
#include <QObject>
#include <QDebug>
Q_OBJECT
public slots:
void printOK() { qDebug() << "OK"; }
void printFail() { qDebug() << "Fail"; }
};
#endif // PRINTER_H
#ifndef PRINTER_H
#define PRINTER_H
#include <QObject>
#include <QDebug>
struct Printer: public QObject {
Q_OBJECT
public slots:
void printOK() { qDebug() << "OK"; }
void printFail() { qDebug() << "Fail"; }
};
#endif // PRINTER_H
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printer.cpp
#include "printer.h"
#include "printer.h"
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Here's the full output with memory dump: http://pastebin.com/btVNe4nd
At 5 QtCreator says that app received signal from OS (signal: SIGABRT) and decompiles
Disassembler (__kernel_vsyscall)
0x132414 <+0x0000> int $0x80
0x132416 <+0x0002> ret
Disassembler (__kernel_vsyscall)
0x132414 <+0x0000> int $0x80
0x132416 <+0x0002> ret
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And valgrind says:
Analysis of memory <path>
QMetaObject::connectSlotsByName: No matching
signal for on_cancelButton_clicked
() "sni-qt/23102" WARN 20:28:53.697 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE
** Analysis finished **
** Unknown error **
Analysis of memory <path>
QMetaObject::connectSlotsByName: No matching signal for on_cancelButton_clicked()
"sni-qt/23102" WARN 20:28:53.697 void StatusNotifierItemFactory::connectToSnw() Invalid interface to SNW_SERVICE
** Analysis finished **
** Unknown error **
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Question on StackOwerflow: http://stackoverflow.com/questions/1...corruption-out
So, why I receive they? I don't use malloc()/free(), you can see it.
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