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https://github.com/archlinuxarm/PKGBUILDs.git
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112 lines
4.3 KiB
Diff
112 lines
4.3 KiB
Diff
From f58e882b7594c59b6050d3c87562fcf836d10f60 Mon Sep 17 00:00:00 2001
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From: Olivier Goffart <ogoffart@woboq.com>
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Date: Tue, 14 Apr 2015 10:58:26 +0200
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Subject: QLockFile: fix deadlock when the lock file is corrupted
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[ChangeLog][QtCore][QLockFile] Fixed a deadlock when the lock file
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is corrupted.
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Task-number: QTBUG-44771
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Change-Id: Ic490b09d70ff1cc1733b64949889a73720b2d0f3
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Reviewed-by: David Faure <david.faure@kdab.com>
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---
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src/corelib/io/qlockfile_unix.cpp | 10 +++++-----
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src/corelib/io/qlockfile_win.cpp | 22 +++++++++++-----------
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tests/auto/corelib/io/qlockfile/tst_qlockfile.cpp | 17 +++++++++++++++++
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3 files changed, 33 insertions(+), 16 deletions(-)
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diff --git a/src/corelib/io/qlockfile_unix.cpp b/src/corelib/io/qlockfile_unix.cpp
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index bf1015a..dc9f8f7 100644
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--- a/src/corelib/io/qlockfile_unix.cpp
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+++ b/src/corelib/io/qlockfile_unix.cpp
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@@ -181,11 +181,11 @@ bool QLockFilePrivate::isApparentlyStale() const
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{
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qint64 pid;
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QString hostname, appname;
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- if (!getLockInfo(&pid, &hostname, &appname))
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- return false;
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- if (hostname.isEmpty() || hostname == QString::fromLocal8Bit(localHostName())) {
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- if (::kill(pid, 0) == -1 && errno == ESRCH)
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- return true; // PID doesn't exist anymore
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+ if (getLockInfo(&pid, &hostname, &appname)) {
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+ if (hostname.isEmpty() || hostname == QString::fromLocal8Bit(localHostName())) {
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+ if (::kill(pid, 0) == -1 && errno == ESRCH)
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+ return true; // PID doesn't exist anymore
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+ }
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}
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const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
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return staleLockTime > 0 && age > staleLockTime;
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diff --git a/src/corelib/io/qlockfile_win.cpp b/src/corelib/io/qlockfile_win.cpp
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index f9f2909..3587c7b 100644
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--- a/src/corelib/io/qlockfile_win.cpp
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+++ b/src/corelib/io/qlockfile_win.cpp
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@@ -115,21 +115,21 @@ bool QLockFilePrivate::isApparentlyStale() const
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{
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qint64 pid;
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QString hostname, appname;
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- if (!getLockInfo(&pid, &hostname, &appname))
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- return false;
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// On WinRT there seems to be no way of obtaining information about other
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// processes due to sandboxing
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#ifndef Q_OS_WINRT
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- if (hostname == QString::fromLocal8Bit(localHostName())) {
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- HANDLE procHandle = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
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- if (!procHandle)
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- return true;
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- // We got a handle but check if process is still alive
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- DWORD dwR = ::WaitForSingleObject(procHandle, 0);
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- ::CloseHandle(procHandle);
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- if (dwR == WAIT_TIMEOUT)
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- return true;
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+ if (getLockInfo(&pid, &hostname, &appname)) {
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+ if (hostname == QString::fromLocal8Bit(localHostName())) {
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+ HANDLE procHandle = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
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+ if (!procHandle)
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+ return true;
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+ // We got a handle but check if process is still alive
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+ DWORD dwR = ::WaitForSingleObject(procHandle, 0);
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+ ::CloseHandle(procHandle);
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+ if (dwR == WAIT_TIMEOUT)
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+ return true;
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+ }
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}
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#endif // !Q_OS_WINRT
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const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
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diff --git a/tests/auto/corelib/io/qlockfile/tst_qlockfile.cpp b/tests/auto/corelib/io/qlockfile/tst_qlockfile.cpp
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index 77bef94..12bea67 100644
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--- a/tests/auto/corelib/io/qlockfile/tst_qlockfile.cpp
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+++ b/tests/auto/corelib/io/qlockfile/tst_qlockfile.cpp
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@@ -58,6 +58,7 @@ private slots:
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void staleLongLockFromBusyProcess();
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void staleLockRace();
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void noPermissions();
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+ void corruptedLockFile();
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public:
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QString m_helperApp;
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@@ -415,5 +416,21 @@ void tst_QLockFile::noPermissions()
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QCOMPARE(int(lockFile.error()), int(QLockFile::PermissionError));
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}
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+void tst_QLockFile::corruptedLockFile()
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+{
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+ const QString fileName = dir.path() + "/corruptedLockFile";
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+
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+ {
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+ // Create a empty file. Typically the result of a computer crash or hard disk full.
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+ QFile file(fileName);
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+ QVERIFY(file.open(QFile::WriteOnly));
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+ }
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+
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+ QLockFile secondLock(fileName);
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+ secondLock.setStaleLockTime(100);
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+ QVERIFY(secondLock.tryLock(10000));
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+ QCOMPARE(int(secondLock.error()), int(QLockFile::NoError));
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+}
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+
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QTEST_MAIN(tst_QLockFile)
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#include "tst_qlockfile.moc"
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--
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cgit v0.11.0
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