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/*****************************************************************
* drkonqi - The KDE Crash Handler
*
* Copyright (C) 2000-2003 Hans Petter Bieker <bieker@kde.org>
* Copyright (C) 2009 George Kiagiadakis <gkiagia@users.sourceforge.net>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************/
#include "backtracegenerator.h"
#include <QTemporaryFile>
#include <QDebug>
#include <KShell>
#include <KProcess>
#include "parser/backtraceparser.h"
BacktraceGenerator::BacktraceGenerator(const Debugger & debugger, QObject *parent)
: QObject(parent),
m_debugger(debugger), m_proc(NULL),
m_temp(NULL), m_state(NotLoaded)
{
m_parser = BacktraceParser::newParser(m_debugger.codeName(), this);
m_parser->connectToGenerator(this);
#ifdef BACKTRACE_PARSER_DEBUG
m_debugParser = BacktraceParser::newParser(QString(), this); //uses the null parser
m_debugParser->connectToGenerator(this);
#endif
}
BacktraceGenerator::~BacktraceGenerator()
{
if (m_proc && m_proc->state() == QProcess::Running) {
qWarning() << "Killing running debugger instance";
m_proc->disconnect(this);
m_proc->terminate();
if (!m_proc->waitForFinished(10000)) {
m_proc->kill();
m_proc->waitForFinished();
}
delete m_proc;
delete m_temp;
}
}
bool BacktraceGenerator::start()
{
//they should always be null before entering this function.
Q_ASSERT(m_proc == NULL && m_temp == NULL);
m_parsedBacktrace.clear();
m_state = Loading;
emit starting();
if (!m_debugger.isValid() || !m_debugger.isInstalled()) {
m_state = FailedToStart;
emit failedToStart();
return false;
}
m_proc = new KProcess;
m_proc->setEnv(QStringLiteral("LC_ALL"), QStringLiteral("C")); // force C locale
m_temp = new QTemporaryFile;
m_temp->open();
m_temp->write(m_debugger.backtraceBatchCommands().toLatin1());
m_temp->write("\n", 1);
m_temp->flush();
// start the debugger
QString str = m_debugger.command();
Debugger::expandString(str, Debugger::ExpansionUsageShell, m_temp->fileName());
*m_proc << KShell::splitArgs(str);
m_proc->setOutputChannelMode(KProcess::OnlyStdoutChannel);
m_proc->setNextOpenMode(QIODevice::ReadWrite | QIODevice::Text);
connect(m_proc, &KProcess::readyReadStandardOutput, this, &BacktraceGenerator::slotReadInput);
connect(m_proc, static_cast<void (KProcess::*)(int, QProcess::ExitStatus)>(&KProcess::finished), this, &BacktraceGenerator::slotProcessExited);
m_proc->start();
if (!m_proc->waitForStarted()) {
//we mustn't keep these around...
m_proc->deleteLater();
m_temp->deleteLater();
m_proc = NULL;
m_temp = NULL;
m_state = FailedToStart;
emit failedToStart();
return false;
}
return true;
}
void BacktraceGenerator::slotReadInput()
{
// we do not know if the output array ends in the middle of an utf-8 sequence
m_output += m_proc->readAllStandardOutput();
int pos;
while ((pos = m_output.indexOf('\n')) != -1) {
QString line = QString::fromLocal8Bit(m_output, pos + 1);
m_output.remove(0, pos + 1);
emit newLine(line);
}
}
void BacktraceGenerator::slotProcessExited(int exitCode, QProcess::ExitStatus exitStatus)
{
//these are useless now
m_proc->deleteLater();
m_temp->deleteLater();
m_proc = NULL;
m_temp = NULL;
//mark the end of the backtrace for the parser
emit newLine(QString());
if (exitStatus != QProcess::NormalExit || exitCode != 0) {
m_state = Failed;
emit someError();
return;
}
//no translation, string appears in the report
QString tmp(QStringLiteral("Application: %progname (%execname), signal: %signame\n"));
Debugger::expandString(tmp);
m_parsedBacktrace = tmp + m_parser->parsedBacktrace();
m_state = Loaded;
#ifdef BACKTRACE_PARSER_DEBUG
//append the raw unparsed backtrace
m_parsedBacktrace += "\n------------ Unparsed Backtrace ------------\n";
m_parsedBacktrace += m_debugParser->parsedBacktrace(); //it's not really parsed, it's from the null parser.
#endif
emit done();
}
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