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// Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Rafael Roquetto <rafael.roquetto@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "lttng.h"
#include "provider.h"
#include "helpers.h"
#include "panic.h"
#include "qtheaders.h"
#include <qfile.h>
#include <qfileinfo.h>
#include <qtextstream.h>
#include <qdebug.h>
static void writeCtfMacro(QTextStream &stream, const Tracepoint::Field &field)
{
const QString ¶mType = field.paramType;
const QString &name = field.name;
const QString &seqLen = field.seqLen;
const int arrayLen = field.arrayLen;
switch (field.backendType) {
case Tracepoint::Field::Array:
stream << "ctf_array(" <<paramType << ", "
<< name << ", " << name << ", " << arrayLen << ")";
return;
case Tracepoint::Field::Sequence:
stream << "ctf_sequence(" << paramType
<< ", " << name << ", " << name
<< ", unsigned int, " << seqLen << ")";
return;
case Tracepoint::Field::Integer:
stream << "ctf_integer(" << paramType << ", " << name << ", " << name << ")";
return;
case Tracepoint::Field::IntegerHex:
case Tracepoint::Field::Pointer:
stream << "ctf_integer_hex(" << paramType << ", " << name << ", " << name << ")";
return;
case Tracepoint::Field::Float:
stream << "ctf_float(" << paramType << ", " << name << ", " << name << ")";
return;
case Tracepoint::Field::String:
stream << "ctf_string(" << name << ", " << name << ")";
return;
case Tracepoint::Field::QtString:
stream << "ctf_sequence(const ushort, " << name << ", "
<< name << ".utf16(), unsigned int, " << name << ".size())";
return;
case Tracepoint::Field::QtByteArray:
stream << "ctf_sequence(const char, " << name << ", "
<< name << ".constData(), unsigned int, " << name << ".size())";
return;
case Tracepoint::Field::QtUrl:
stream << "ctf_sequence(const char, " << name << ", "
<< name << ".toEncoded().constData(), unsigned int, "
<< name << ".toEncoded().size())";
return;
case Tracepoint::Field::QtRect:
stream << "ctf_integer(int, x, " << name << ".x()) "
<< "ctf_integer(int, y, " << name << ".y()) "
<< "ctf_integer(int, width, " << name << ".width()) "
<< "ctf_integer(int, height, " << name << ".height()) ";
return;
case Tracepoint::Field::Unknown:
justified_worry("Cannot deduce CTF type for '%s %s'", qPrintable(paramType),
qPrintable(name));
break;
}
}
static void writePrologue(QTextStream &stream, const QString &fileName, const Provider &provider)
{
const QString guard = includeGuard(fileName);
stream << "#undef TRACEPOINT_PROVIDER\n";
stream << "#define TRACEPOINT_PROVIDER " << provider.name << "\n";
stream << "\n";
// include prefix text or qt headers only once
stream << "#if !defined(" << guard << ")\n";
stream << qtHeaders();
stream << "\n";
if (!provider.prefixText.isEmpty())
stream << provider.prefixText.join(u'\n') << "\n\n";
stream << "#endif\n\n";
/* the first guard is the usual one, the second is required
* by LTTNG to force the re-evaluation of TRACEPOINT_* macros
*/
stream << "#if !defined(" << guard << ") || defined(TRACEPOINT_HEADER_MULTI_READ)\n";
stream << "#define " << guard << "\n\n"
<< "#undef TRACEPOINT_INCLUDE\n"
<< "#define TRACEPOINT_INCLUDE \"" << fileName << "\"\n\n";
stream << "#include <lttng/tracepoint.h>\n\n";
const QString namespaceGuard = guard + QStringLiteral("_USE_NAMESPACE");
stream << "#if !defined(" << namespaceGuard << ")\n"
<< "#define " << namespaceGuard << "\n"
<< "QT_USE_NAMESPACE\n"
<< "#endif // " << namespaceGuard << "\n\n";
}
static void writeEpilogue(QTextStream &stream, const QString &fileName)
{
stream << "\n";
stream << "#endif // " << includeGuard(fileName) << "\n"
<< "#include <lttng/tracepoint-event.h>\n"
<< "#include <private/qtrace_p.h>\n";
}
static void writeWrapper(QTextStream &stream,
const Tracepoint &tracepoint, const QString &providerName)
{
const QString argList = formatFunctionSignature(tracepoint.args);
const QString paramList = formatParameterList(tracepoint.args, LTTNG);
const QString &name = tracepoint.name;
const QString includeGuard = QStringLiteral("TP_%1_%2").arg(providerName).arg(name).toUpper();
/* prevents the redefinion of the inline wrapper functions
* once LTTNG recursively includes this header file
*/
stream << "\n"
<< "#ifndef " << includeGuard << "\n"
<< "#define " << includeGuard << "\n"
<< "QT_BEGIN_NAMESPACE\n"
<< "namespace QtPrivate {\n";
stream << "inline void trace_" << name << "(" << argList << ")\n"
<< "{\n"
<< " tracepoint(" << providerName << ", " << name << paramList << ");\n"
<< "}\n";
stream << "inline void do_trace_" << name << "(" << argList << ")\n"
<< "{\n"
<< " do_tracepoint(" << providerName << ", " << name << paramList << ");\n"
<< "}\n";
stream << "inline bool trace_" << name << "_enabled()\n"
<< "{\n"
<< " return tracepoint_enabled(" << providerName << ", " << name << ");\n"
<< "}\n";
stream << "} // namespace QtPrivate\n"
<< "QT_END_NAMESPACE\n"
<< "#endif // " << includeGuard << "\n\n";
}
static void writeTracepoint(QTextStream &stream,
const Tracepoint &tracepoint, const QString &providerName)
{
stream << "TRACEPOINT_EVENT(\n"
<< " " << providerName << ",\n"
<< " " << tracepoint.name << ",\n"
<< " TP_ARGS(";
const char *comma = nullptr;
for (const Tracepoint::Argument &arg : tracepoint.args) {
stream << comma << arg.type << ", " << arg.name;
comma = ", ";
}
stream << "),\n"
<< " TP_FIELDS(";
const char *newline = nullptr;
for (const Tracepoint::Field &f : tracepoint.fields) {
stream << newline;
writeCtfMacro(stream, f);
newline = "\n ";
}
stream << ")\n)\n\n";
}
static void writeTracepoints(QTextStream &stream, const Provider &provider)
{
for (const Tracepoint &t : provider.tracepoints) {
writeTracepoint(stream, t, provider.name);
writeWrapper(stream, t, provider.name);
}
}
void writeLttng(QFile &file, const Provider &provider)
{
QTextStream stream(&file);
const QString fileName = QFileInfo(file.fileName()).fileName();
writePrologue(stream, fileName, provider);
writeTracepoints(stream, provider);
writeEpilogue(stream, fileName);
}
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