diff options
Diffstat (limited to 'src/plugins/qmltooling/qmldbg_debugger/qv4debugger.cpp')
| -rw-r--r-- | src/plugins/qmltooling/qmldbg_debugger/qv4debugger.cpp | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.cpp b/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.cpp new file mode 100644 index 0000000000..53f2eab5ff --- /dev/null +++ b/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.cpp @@ -0,0 +1,328 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qv4debugger.h" +#include "qv4debugjob.h" +#include "qv4datacollector.h" + +#include <private/qv4scopedvalue_p.h> +#include <private/qv4script_p.h> +#include <private/qqmlcontext_p.h> +#include <private/qqmlengine_p.h> + +QT_BEGIN_NAMESPACE + +QV4Debugger::BreakPoint::BreakPoint(const QString &fileName, int line) + : fileName(fileName), lineNumber(line) +{} + +inline uint qHash(const QV4Debugger::BreakPoint &b, uint seed = 0) Q_DECL_NOTHROW +{ + return qHash(b.fileName, seed) ^ b.lineNumber; +} + +inline bool operator==(const QV4Debugger::BreakPoint &a, + const QV4Debugger::BreakPoint &b) +{ + return a.lineNumber == b.lineNumber && a.fileName == b.fileName; +} + +QV4Debugger::QV4Debugger(QV4::ExecutionEngine *engine) + : m_engine(engine) + , m_state(Running) + , m_stepping(NotStepping) + , m_pauseRequested(false) + , m_haveBreakPoints(false) + , m_breakOnThrow(false) + , m_returnedValue(engine, QV4::Primitive::undefinedValue()) + , m_gatherSources(0) + , m_runningJob(0) + , m_collector(engine) +{ + static int debuggerId = qRegisterMetaType<QV4Debugger*>(); + static int pauseReasonId = qRegisterMetaType<QV4Debugger::PauseReason>(); + Q_UNUSED(debuggerId); + Q_UNUSED(pauseReasonId); +} + +QV4::ExecutionEngine *QV4Debugger::engine() const +{ + return m_engine; +} + +const QV4DataCollector *QV4Debugger::collector() const +{ + return &m_collector; +} + +QV4DataCollector *QV4Debugger::collector() +{ + return &m_collector; +} + +void QV4Debugger::pause() +{ + QMutexLocker locker(&m_lock); + if (m_state == Paused) + return; + m_pauseRequested = true; +} + +void QV4Debugger::resume(Speed speed) +{ + QMutexLocker locker(&m_lock); + if (m_state != Paused) + return; + + if (!m_returnedValue.isUndefined()) + m_returnedValue.set(m_engine, QV4::Encode::undefined()); + + m_currentContext.set(m_engine, *m_engine->currentContext); + m_stepping = speed; + m_runningCondition.wakeAll(); +} + +QV4Debugger::State QV4Debugger::state() const +{ + return m_state; +} + +void QV4Debugger::addBreakPoint(const QString &fileName, int lineNumber, const QString &condition) +{ + QMutexLocker locker(&m_lock); + m_breakPoints.insert(BreakPoint(fileName.mid(fileName.lastIndexOf('/') + 1), + lineNumber), condition); + m_haveBreakPoints = true; +} + +void QV4Debugger::removeBreakPoint(const QString &fileName, int lineNumber) +{ + QMutexLocker locker(&m_lock); + m_breakPoints.remove(BreakPoint(fileName.mid(fileName.lastIndexOf('/') + 1), + lineNumber)); + m_haveBreakPoints = !m_breakPoints.isEmpty(); +} + +void QV4Debugger::setBreakOnThrow(bool onoff) +{ + QMutexLocker locker(&m_lock); + + m_breakOnThrow = onoff; +} + +void QV4Debugger::clearPauseRequest() +{ + QMutexLocker locker(&m_lock); + m_pauseRequested = false; +} + +QV4Debugger::ExecutionState QV4Debugger::currentExecutionState() const +{ + ExecutionState state; + state.fileName = getFunction()->sourceFile(); + state.lineNumber = engine()->current->lineNumber; + + return state; +} + +bool QV4Debugger::pauseAtNextOpportunity() const { + return m_pauseRequested || m_haveBreakPoints || m_gatherSources || m_stepping >= StepOver; +} + +QVector<QV4::StackFrame> QV4Debugger::stackTrace(int frameLimit) const +{ + return m_engine->stackTrace(frameLimit); +} + +void QV4Debugger::maybeBreakAtInstruction() +{ + if (m_runningJob) // do not re-enter when we're doing a job for the debugger. + return; + + QMutexLocker locker(&m_lock); + + if (m_gatherSources) { + m_gatherSources->run(); + delete m_gatherSources; + m_gatherSources = 0; + } + + switch (m_stepping) { + case StepOver: + if (m_currentContext.asManaged()->d() != m_engine->current) + break; + // fall through + case StepIn: + pauseAndWait(Step); + return; + case StepOut: + case NotStepping: + break; + } + + if (m_pauseRequested) { // Serve debugging requests from the agent + m_pauseRequested = false; + pauseAndWait(PauseRequest); + } else if (m_haveBreakPoints) { + if (QV4::Function *f = getFunction()) { + const int lineNumber = engine()->current->lineNumber; + if (reallyHitTheBreakPoint(f->sourceFile(), lineNumber)) + pauseAndWait(BreakPointHit); + } + } +} + +void QV4Debugger::enteringFunction() +{ + if (m_runningJob) + return; + QMutexLocker locker(&m_lock); + + if (m_stepping == StepIn) { + m_currentContext.set(m_engine, *m_engine->currentContext); + } +} + +void QV4Debugger::leavingFunction(const QV4::ReturnedValue &retVal) +{ + if (m_runningJob) + return; + Q_UNUSED(retVal); // TODO + + QMutexLocker locker(&m_lock); + + if (m_stepping != NotStepping && m_currentContext.asManaged()->d() == m_engine->current) { + m_currentContext.set(m_engine, *m_engine->parentContext(m_engine->currentContext)); + m_stepping = StepOver; + m_returnedValue.set(m_engine, retVal); + } +} + +void QV4Debugger::aboutToThrow() +{ + if (!m_breakOnThrow) + return; + + if (m_runningJob) // do not re-enter when we're doing a job for the debugger. + return; + + QMutexLocker locker(&m_lock); + pauseAndWait(Throwing); +} + +QV4::Function *QV4Debugger::getFunction() const +{ + QV4::Scope scope(m_engine); + QV4::ExecutionContext *context = m_engine->currentContext; + QV4::ScopedFunctionObject function(scope, context->getFunctionObject()); + if (function) + return function->function(); + else + return context->d()->engine->globalCode; +} + +void QV4Debugger::runJobUnpaused() +{ + QMutexLocker locker(&m_lock); + if (m_runningJob) + m_runningJob->run(); + m_jobIsRunning.wakeAll(); +} + +void QV4Debugger::pauseAndWait(PauseReason reason) +{ + if (m_runningJob) + return; + + m_state = Paused; + emit debuggerPaused(this, reason); + + while (true) { + m_runningCondition.wait(&m_lock); + if (m_runningJob) { + m_runningJob->run(); + m_jobIsRunning.wakeAll(); + } else { + break; + } + } + + m_state = Running; +} + +bool QV4Debugger::reallyHitTheBreakPoint(const QString &filename, int linenr) +{ + QHash<BreakPoint, QString>::iterator it = m_breakPoints.find( + BreakPoint(filename.mid(filename.lastIndexOf('/') + 1), linenr)); + if (it == m_breakPoints.end()) + return false; + QString condition = it.value(); + if (condition.isEmpty()) + return true; + + Q_ASSERT(m_runningJob == 0); + EvalJob evilJob(m_engine, condition); + m_runningJob = &evilJob; + m_runningJob->run(); + m_runningJob = 0; + + return evilJob.resultAsBoolean(); +} + +void QV4Debugger::runInEngine(QV4DebugJob *job) +{ + QMutexLocker locker(&m_lock); + runInEngine_havingLock(job); +} + +void QV4Debugger::runInEngine_havingLock(QV4DebugJob *job) +{ + Q_ASSERT(job); + Q_ASSERT(m_runningJob == 0); + + m_runningJob = job; + if (state() == Paused) + m_runningCondition.wakeAll(); + else + QMetaObject::invokeMethod(this, "runJobUnpaused", Qt::QueuedConnection); + m_jobIsRunning.wait(&m_lock); + m_runningJob = 0; +} + +QT_END_NAMESPACE |