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Fixes: Synchronous process hangs on Windows if executable not present

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Details: StartFailed is triggered before the event loop starts on Windows.
This commit is contained in:
Friedemann Kleint
2008-12-04 17:17:16 +01:00
parent a418183596
commit c9f88bf08e
1 changed files with 33 additions and 19 deletions
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52
src/libs/utils/synchronousprocess.cpp
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@@ -125,6 +125,7 @@ struct SynchronousProcessPrivate {
SynchronousProcessResponse m_result;
int m_hangTimerCount;
int m_maxHangTimerCount;
bool m_startFailure;
ChannelBuffer m_stdOut;
ChannelBuffer m_stdErr;
@@ -133,7 +134,8 @@ struct SynchronousProcessPrivate {
SynchronousProcessPrivate::SynchronousProcessPrivate() :
m_stdOutCodec(0),
m_hangTimerCount(0),
m_maxHangTimerCount(defaultMaxHangTimerCount)
m_maxHangTimerCount(defaultMaxHangTimerCount),
m_startFailure(false)
{
}
@@ -143,6 +145,7 @@ void SynchronousProcessPrivate::clearForRun()
m_stdOut.clearForRun();
m_stdErr.clearForRun();
m_result.clear();
m_startFailure = false;
}
// ----------- SynchronousProcess
@@ -221,23 +224,27 @@ SynchronousProcessResponse SynchronousProcess::run(const QString &binary,
qDebug() << '>' << Q_FUNC_INFO << binary << args;
m_d->clearForRun();
m_d->m_timer.start();
QApplication::setOverrideCursor(Qt::WaitCursor);
// On Windows, start failure is triggered immediately if the
// executable cannot be found in the path. Do not start the
// event loop in that case.
m_d->m_process.start(binary, args, QIODevice::ReadOnly);
m_d->m_eventLoop.exec(QEventLoop::ExcludeUserInputEvents);
if (m_d->m_result.result == SynchronousProcessResponse::Finished || m_d->m_result.result == SynchronousProcessResponse::FinishedError) {
processStdOut(false);
processStdErr(false);
if (!m_d->m_startFailure) {
m_d->m_timer.start();
QApplication::setOverrideCursor(Qt::WaitCursor);
m_d->m_eventLoop.exec(QEventLoop::ExcludeUserInputEvents);
if (m_d->m_result.result == SynchronousProcessResponse::Finished || m_d->m_result.result == SynchronousProcessResponse::FinishedError) {
processStdOut(false);
processStdErr(false);
}
m_d->m_result.stdOut = convertStdOut(m_d->m_stdOut.data);
m_d->m_result.stdErr = convertStdErr(m_d->m_stdErr.data);
m_d->m_timer.stop();
QApplication::restoreOverrideCursor();
}
m_d->m_result.stdOut = convertStdOut(m_d->m_stdOut.data);
m_d->m_result.stdErr = convertStdErr(m_d->m_stdErr.data);
m_d->m_timer.stop();
QApplication::restoreOverrideCursor();
if (debug)
qDebug() << '<' << Q_FUNC_INFO << binary << m_d->m_result;
return m_d->m_result;
@@ -246,12 +253,14 @@ SynchronousProcessResponse SynchronousProcess::run(const QString &binary,
void SynchronousProcess::slotTimeout()
{
if (++m_d->m_hangTimerCount > m_d->m_maxHangTimerCount) {
if (debug)
qDebug() << Q_FUNC_INFO << "HANG detected, killing";
m_d->m_process.kill();
m_d->m_result.result = SynchronousProcessResponse::Hang;
} else {
if (debug)
qDebug() << Q_FUNC_INFO << m_d->m_hangTimerCount;
}
if (debug)
qDebug() << Q_FUNC_INFO << m_d->m_hangTimerCount;
}
void SynchronousProcess::finished(int exitCode, QProcess::ExitStatus e)
@@ -265,7 +274,9 @@ void SynchronousProcess::finished(int exitCode, QProcess::ExitStatus e)
m_d->m_result.exitCode = exitCode;
break;
case QProcess::CrashExit:
m_d->m_result.result = SynchronousProcessResponse::TerminatedAbnormally;
// Was hang detected before and killed?
if (m_d->m_result.result != SynchronousProcessResponse::Hang)
m_d->m_result.result = SynchronousProcessResponse::TerminatedAbnormally;
m_d->m_result.exitCode = -1;
break;
}
@@ -277,7 +288,10 @@ void SynchronousProcess::error(QProcess::ProcessError e)
m_d->m_hangTimerCount = 0;
if (debug)
qDebug() << Q_FUNC_INFO << e;
m_d->m_result.result = SynchronousProcessResponse::StartFailed;
// Was hang detected before and killed?
if (m_d->m_result.result != SynchronousProcessResponse::Hang)
m_d->m_result.result = SynchronousProcessResponse::StartFailed;
m_d->m_startFailure = true;
m_d->m_eventLoop.quit();
}