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Cdb: Fix step out.

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Use debugger's 'gu' command instead of temporary breakpoint as a
workaround until it is properly supported by the
SetExecutionStatus() API.

Reviewed-by: hjk
Task-number: QTCREATORBUG-240
This commit is contained in:
Friedemann Kleint
2009-11-10 10:40:24 +01:00
parent dcad2e249f
commit 5acac101a6
2 changed files with 23 additions and 43 deletions
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65
src/plugins/debugger/cdb/cdbdebugengine.cpp
View File

@@ -1034,9 +1034,16 @@ static inline QString msgStepFailed(unsigned long executionStatus, int threadId,
return QString::fromLatin1("Thread %1: Unable to step into: %2").arg(threadId).arg(why);
}
// Step with DEBUG_STATUS_STEP_OVER ('p'-command) or
// Step out has to be done via executing 'gu'. TODO: Remove once it is
// accessible via normal API for SetExecutionStatus().
enum { CdbExtendedExecutionStatusStepOut = 7452347 };
// Step with DEBUG_STATUS_STEP_OVER ('p'-command),
// DEBUG_STATUS_STEP_INTO ('t'-trace-command) or
// CdbExtendedExecutionStatusStepOut ("gu"-command)
// its reverse equivalents in the case of single threads.
bool CdbDebugEngine::step(unsigned long executionStatus)
{
if (debugCDBExecution)
@@ -1068,7 +1075,7 @@ bool CdbDebugEngine::step(unsigned long executionStatus)
m_d->setCodeLevel(); // Step by instruction or source line
setState(InferiorRunningRequested, Q_FUNC_INFO, __LINE__);
bool success = false;
if (sameThread) { // Step event-triggering thread, use fast API
if (sameThread && executionStatus != CdbExtendedExecutionStatusStepOut) { // Step event-triggering thread, use fast API
const HRESULT hr = m_d->m_cif.debugControl->SetExecutionStatus(executionStatus);
success = SUCCEEDED(hr);
if (!success)
@@ -1077,8 +1084,18 @@ bool CdbDebugEngine::step(unsigned long executionStatus)
// Need to use a command to explicitly specify the current thread
QString command;
QTextStream str(&command);
str << '~' << m_d->m_currentThreadId << ' '
<< (executionStatus == DEBUG_STATUS_STEP_OVER ? 'p' : 't');
str << '~' << m_d->m_currentThreadId << ' ';
switch (executionStatus) {
case DEBUG_STATUS_STEP_OVER:
str << 'p';
break;
case DEBUG_STATUS_STEP_INTO:
str << 't';
break;
case CdbExtendedExecutionStatusStepOut:
str << "gu";
break;
}
manager()->showDebuggerOutput(tr("Stepping %1").arg(command));
const HRESULT hr = m_d->m_cif.debugControl->Execute(DEBUG_OUTCTL_THIS_CLIENT, command.toLatin1().constData(), DEBUG_EXECUTE_ECHO);
success = SUCCEEDED(hr);
@@ -1121,44 +1138,8 @@ void CdbDebugEngine::nextIExec()
void CdbDebugEngine::stepOutExec()
{
if (debugCDBExecution)
qDebug() << "stepOutExec";
// emulate gdb 'exec-finish' (exec until return of current function)
// by running up to address of the above stack frame (mostly works).
const StackHandler* sh = manager()->stackHandler();
const int idx = sh->currentIndex() + 1;
const QList<StackFrame> stackframes = sh->frames();
if (idx < 0 || idx >= stackframes.size()) {
warning(QString::fromLatin1("Cannot step out of stack frame %1.").arg(idx));
return;
}
// Set a temporary breakpoint and continue
const StackFrame& frame = stackframes.at(idx);
bool success = false;
QString errorMessage;
do {
const ULONG64 address = frame.address.toULongLong(&success, 16);
if (!success) {
errorMessage = QLatin1String("Cannot obtain address from stack frame");
break;
}
manager()->showDebuggerOutput(LogMisc, tr("Running to 0x%1...").arg(address, 0, 16));
IDebugBreakpoint2* pBP;
HRESULT hr = m_d->m_cif.debugControl->AddBreakpoint2(DEBUG_BREAKPOINT_CODE, DEBUG_ANY_ID, &pBP);
if (FAILED(hr) || !pBP) {
errorMessage = QString::fromLatin1("Cannot create temporary breakpoint: %1").arg(msgDebugEngineComResult(hr));
break;
}
pBP->SetOffset(address);
pBP->AddFlags(DEBUG_BREAKPOINT_ENABLED);
pBP->AddFlags(DEBUG_BREAKPOINT_ONE_SHOT);
if (!m_d->continueInferior(&errorMessage))
break;
success = true;
} while (false);
if (!success)
warning(msgFunctionFailed(Q_FUNC_INFO, errorMessage));
if (!manager()->isReverseDebugging())
step(CdbExtendedExecutionStatusStepOut);
}
void CdbDebugEngine::continueInferior()

1
src/plugins/debugger/cdb/cdbdebugengine.h
View File

@@ -120,7 +120,6 @@ private:
void startWatchTimer();
void killWatchTimer();
void processTerminated(unsigned long exitCode);
bool executeDebuggerCommand(const QString &command, QString *errorMessage);
bool evaluateExpression(const QString &expression, QString *value, QString *type, QString *errorMessage);
void evaluateWatcher(WatchData *wd);
QString editorToolTip(const QString &exp, const QString &function);