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tst_Q*Application: debug a crashing application

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Implemented for lldb and gdb. MSVC comes with lldb.exe (it doesn't work,
but maybe some day). I couldn't find out even how to install cdb.exe, so
that's left as a task for someone else.

Pick-to: 6.9 6.8
Change-Id: I9d93747476531d4cfd53fffddecc5b3339d2fd7c
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
This commit is contained in:
Thiago Macieira 2025-03-03 11:38:58 -03:00
parent b03921eb9f
commit 0f9860618f
1 changed files with 35 additions and 0 deletions
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35
tests/auto/corelib/kernel/qcoreapplication/apphelper.h
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@ -38,6 +38,41 @@ inline void run()
if (qint8(process.exitCode()) == -1) if (qint8(process.exitCode()) == -1)
QSKIP("Process requested skip: " + process.readAllStandardOutput().trimmed()); QSKIP("Process requested skip: " + process.readAllStandardOutput().trimmed());
auto debugCrash = qScopeGuard([&] {
if (process.exitStatus() != QProcess::CrashExit)
return;
# if defined(Q_CC_MSVC)
// ### implement cdb support
# endif
QString lldb = QStandardPaths::findExecutable("lldb");
QString gdb
# if !defined(Q_OS_DARWIN) && !defined(Q_CC_MSVC)
// don't search for gdb:
// - it requires running with sudo to work on Apple systems
// - it doesn't know how to decode MSVC debug information (but lldb does)
= QStandardPaths::findExecutable("gdb")
# endif
;
if (!gdb.isEmpty()) {
process.setArguments({ "--nx", "--batch", "-ex", "run", "-ex", "thread apply all bt",
"--args", process.program(), process.arguments().first() });
process.setProgram(gdb);
} else if (!lldb.isEmpty()) {
process.setArguments({ "--no-lldbinit", "--batch", "-o", "run", "-o", "bt all",
"--", process.program(), process.arguments().first() });
process.setProgram(lldb);
} else {
qInfo("Cannot debug '%s': cannot find a debugger", qPrintable(process.program()));
return;
}
process.setProcessChannelMode(QProcess::ForwardedChannels);
process.start();
process.closeWriteChannel();
process.waitForFinished();
});
QCOMPARE(process.exitStatus(), QProcess::NormalExit); QCOMPARE(process.exitStatus(), QProcess::NormalExit);
QCOMPARE(process.readAllStandardError(), QString()); QCOMPARE(process.readAllStandardError(), QString());
QCOMPARE(process.exitCode(), 0); QCOMPARE(process.exitCode(), 0);