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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qv4stackframe_p.h"
#include <private/qv4qobjectwrapper_p.h>
#include <QtCore/qstring.h>
using namespace QV4;
QString CppStackFrame::source() const
{
return v4Function ? v4Function->sourceFile() : QString();
}
QString CppStackFrame::function() const
{
return v4Function ? v4Function->name()->toQString() : QString();
}
static const CompiledData::CodeOffsetToLineAndStatement *lineAndStatement(const CppStackFrame *frame)
{
if (!frame->v4Function || frame->instructionPointer <= 0)
return nullptr;
auto findLine = [](const CompiledData::CodeOffsetToLineAndStatement &entry, uint offset) {
return entry.codeOffset < offset;
};
const QV4::CompiledData::Function *cf = frame->v4Function->compiledFunction;
const uint offset = frame->instructionPointer;
const CompiledData::CodeOffsetToLineAndStatement *lineAndStatementNumbers
= cf->lineAndStatementNumberTable();
const uint nLineAndStatementNumbers = cf->nLineAndStatementNumbers;
return std::lower_bound(
lineAndStatementNumbers, lineAndStatementNumbers + nLineAndStatementNumbers,
offset, findLine) - 1;
}
int CppStackFrame::lineNumber() const
{
if (auto *line = lineAndStatement(this))
return line->line;
return missingLineNumber();
}
int CppStackFrame::statementNumber() const
{
if (auto *statement = lineAndStatement(this))
return statement->statement;
return -1;
}
int CppStackFrame::missingLineNumber() const
{
// Remove the first bit so that we can cast to positive int and negate.
// Remove the last bit so that it can't be -1.
const int result = -int(quintptr(this) & 0x7ffffffe);
Q_ASSERT(result < -1);
return result;
}
ReturnedValue QV4::CppStackFrame::thisObject() const
{
if (isJSTypesFrame())
return static_cast<const JSTypesStackFrame *>(this)->thisObject();
Q_ASSERT(isMetaTypesFrame());
const auto metaTypesFrame = static_cast<const MetaTypesStackFrame *>(this);
return QObjectWrapper::wrap(metaTypesFrame->context()->engine(), metaTypesFrame->thisObject());
}
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