qt-creator/src/plugins/debugger/disassembleragent.cpp

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**
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** Foundation and appearing in the file LICENSE.LGPL included in the
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#include "disassembleragent.h"

#include "breakhandler.h"
#include "debuggerengine.h"
#include "debuggercore.h"
#include "debuggerstringutils.h"
#include "stackframe.h"

#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/ieditor.h>
#include <coreplugin/icore.h>
#include <coreplugin/mimedatabase.h>

#include <texteditor/basetextdocument.h>
#include <texteditor/basetexteditor.h>
#include <texteditor/basetextmark.h>
#include <texteditor/plaintexteditor.h>
#include <texteditor/texteditorconstants.h>

#include <utils/qtcassert.h>

#include <QtGui/QTextBlock>
#include <QtGui/QIcon>


using namespace Core;

namespace Debugger {
namespace Internal {

///////////////////////////////////////////////////////////////////////
//
// DisassemblerAgent
//
///////////////////////////////////////////////////////////////////////

class LocationMark2 : public TextEditor::ITextMark
{
public:
    LocationMark2() {}

    QIcon icon() const { return debuggerCore()->locationMarkIcon(); }
    void updateLineNumber(int /*lineNumber*/) {}
    void updateBlock(const QTextBlock & /*block*/) {}
    void removedFromEditor() {}
    void documentClosing() {}
};

class BreakpointMarker2 : public TextEditor::ITextMark
{
public:
    BreakpointMarker2(const QIcon &icon) : m_icon(icon) {}

    QIcon icon() const { return m_icon; }
    void updateLineNumber(int) {}
    void updateBlock(const QTextBlock &) {}
    void removedFromEditor() {}
    void documentClosing() {}

private:
    QIcon m_icon;
};


class DisassemblerAgentPrivate
{
public:
    DisassemblerAgentPrivate();
    ~DisassemblerAgentPrivate();
    void configureMimeType();

public:
    QPointer<TextEditor::ITextEditor> editor;
    Location location;
    bool tryMixed;
    QPointer<DebuggerEngine> engine;
    TextEditor::ITextMark *locationMark;
    QList<TextEditor::ITextMark *> breakpointMarks;
    
    QHash<QString, DisassemblerLines> cache;
    QString mimeType;
};

DisassemblerAgentPrivate::DisassemblerAgentPrivate()
  : editor(0),
    tryMixed(true),
    locationMark(new LocationMark2),
    mimeType(_("text/x-qtcreator-generic-asm"))
{
}

DisassemblerAgentPrivate::~DisassemblerAgentPrivate()
{
    if (editor) {
        EditorManager *editorManager = EditorManager::instance();
        editorManager->closeEditors(QList<IEditor *>() << editor);
    }
    editor = 0;
    delete locationMark;
}

/*!
    \class DisassemblerAgent

     Objects from this class are created in response to user actions in
     the Gui for showing disassembled memory from the inferior. After creation
     it handles communication between the engine and the editor.
*/

DisassemblerAgent::DisassemblerAgent(DebuggerEngine *engine)
    : QObject(0), d(new DisassemblerAgentPrivate)
{
    d->engine = engine;
}

DisassemblerAgent::~DisassemblerAgent()
{
    delete d;
    d = 0;
}

void DisassemblerAgent::cleanup()
{
    d->cache.clear();
}

void DisassemblerAgent::resetLocation()
{
    if (!d->editor)
        return;
    d->editor->markableInterface()->removeMark(d->locationMark);
}

static QString frameKey(const Location &loc)
{
    return _("%1:%2:%3").arg(loc.functionName())
        .arg(loc.fileName()).arg(loc.address());
}

const Location &DisassemblerAgent::location() const
{
    return d->location;
}

bool DisassemblerAgent::isMixed() const
{
    return d->tryMixed
        && d->location.lineNumber() > 0
        && !d->location.functionName().isEmpty()
        && d->location.functionName() != _("??");
}

void DisassemblerAgent::setLocation(const Location &loc)
{
    d->location = loc;
    if (isMixed()) {
        QHash<QString, DisassemblerLines>::ConstIterator it =
            d->cache.find(frameKey(loc));
        if (it != d->cache.end()) {
            QString msg = _("Use cache disassembler for '%1' in '%2'")
                .arg(loc.functionName()).arg(loc.fileName());
            d->engine->showMessage(msg);
            setContents(*it);
            updateBreakpointMarkers();
            updateLocationMarker();
            return;
        }
    }
    d->engine->fetchDisassembler(this);
}

void DisassemblerAgentPrivate::configureMimeType()
{
    QTC_ASSERT(editor, return);

    TextEditor::BaseTextDocument *doc =
        qobject_cast<TextEditor::BaseTextDocument *>(editor->file());
    QTC_ASSERT(doc, return);
    doc->setMimeType(mimeType);

    TextEditor::PlainTextEditor *pe =
        qobject_cast<TextEditor::PlainTextEditor *>(editor->widget());
    QTC_ASSERT(pe, return);

    MimeType mtype = ICore::instance()->mimeDatabase()->findByType(mimeType);
    if (mtype)
        pe->configure(mtype);
    else
        qWarning("Assembler mimetype '%s' not found.", qPrintable(mimeType));
}

QString DisassemblerAgent::mimeType() const
{
    return d->mimeType;
}

void DisassemblerAgent::setMimeType(const QString &mt)
{
    if (mt == d->mimeType)
        return;
    d->mimeType = mt;
    if (d->editor)
       d->configureMimeType();
}

void DisassemblerAgent::setContents(const DisassemblerLines &contents)
{
    QTC_ASSERT(d, return);
    using namespace Core;
    using namespace TextEditor;

    EditorManager *editorManager = EditorManager::instance();
    if (!d->editor) {
        QString titlePattern = "Disassembler";
        d->editor = qobject_cast<ITextEditor *>(
            editorManager->openEditorWithContents(
                Core::Constants::K_DEFAULT_TEXT_EDITOR_ID,
                &titlePattern));
        QTC_ASSERT(d->editor, return);
        d->editor->setProperty(Debugger::Constants::OPENED_BY_DEBUGGER, true);
        d->editor->setProperty(Debugger::Constants::OPENED_WITH_DISASSEMBLY, true);
        d->configureMimeType();

        BaseTextEditor *baseTextEdit =
                qobject_cast<BaseTextEditor *>(d->editor->widget());
        if (baseTextEdit)
            baseTextEdit->setRequestMarkEnabled(true);
    }

    editorManager->activateEditor(d->editor);

    QPlainTextEdit *plainTextEdit =
        qobject_cast<QPlainTextEdit *>(d->editor->widget());
    QTC_ASSERT(plainTextEdit, return);

    QString str;
    for (int i = 0, n = contents.size(); i != n; ++i) {
        const DisassemblerLine &dl = contents.at(i);
        if (dl.address) {
            str += QString("0x");
            str += QString::number(dl.address, 16);
            str += "  ";
        }
        str += dl.data;
        str += "\n";
    }
    plainTextEdit->setPlainText(str);
    plainTextEdit->setReadOnly(true);

    d->cache.insert(frameKey(d->location), contents);
    d->editor->setDisplayName(_("Disassembler (%1)")
        .arg(d->location.functionName()));

    updateBreakpointMarkers();
    updateLocationMarker();
}

void DisassemblerAgent::updateLocationMarker()
{
    QTC_ASSERT(d->editor, return);

    const DisassemblerLines &contents = d->cache.value(frameKey(d->location));
    int lineNumber = contents.lineForAddress(d->location.address());

    if (d->location.needsMarker()) {
        d->editor->markableInterface()->removeMark(d->locationMark);
        if (lineNumber)
            d->editor->markableInterface()->addMark(d->locationMark, lineNumber);
    }

    QPlainTextEdit *plainTextEdit =
        qobject_cast<QPlainTextEdit *>(d->editor->widget());
    QTC_ASSERT(plainTextEdit, return); 
    QTextCursor tc = plainTextEdit->textCursor();
    QTextBlock block = tc.document()->findBlockByNumber(lineNumber - 1);
    tc.setPosition(block.position());
    plainTextEdit->setTextCursor(tc);
}

void DisassemblerAgent::updateBreakpointMarkers()
{
    if (!d->editor)
        return;

    BreakHandler *handler = breakHandler();
    BreakpointIds ids = handler->engineBreakpointIds(d->engine);
    if (ids.isEmpty())
        return;

    const DisassemblerLines &contents = d->cache.value(frameKey(d->location));

    foreach (TextEditor::ITextMark *marker, d->breakpointMarks)
        d->editor->markableInterface()->removeMark(marker);
    d->breakpointMarks.clear();
    foreach (BreakpointId id, ids) {
        const quint64 address = handler->address(id);
        if (!address)
            continue;
        const int lineNumber = contents.lineForAddress(address);
        if (!lineNumber)
            continue;
        BreakpointMarker2 *marker = new BreakpointMarker2(handler->icon(id));
        d->breakpointMarks.append(marker);
        d->editor->markableInterface()->addMark(marker, lineNumber);
    }
}

quint64 DisassemblerAgent::address() const
{
    return d->location.address();
}

// Return address of an assembly line "0x0dfd  bla"
quint64 DisassemblerAgent::addressFromDisassemblyLine(const QString &line)
{
    return DisassemblerLine(line).address;
}

void DisassemblerAgent::setTryMixed(bool on)
{
    d->tryMixed = on;
}

} // namespace Internal
} // namespace Debugger