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asarium
39ab45dc7c
This can be used for mark parts of the code which should be unreachable in normal execution. In debug mode, if such a statement is reached an Error dialog is shown which aborts the execution. In release mode the macro is replaced with a compiler specific expression that lets the compiler know that this part is unreachable which allows it to optimize the code better.
126 lines
2.5 KiB
C++
126 lines
2.5 KiB
C++
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#include "tracing/TraceEventWriter.h"
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#include <iomanip>
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namespace
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{
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using namespace tracing;
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const char* getTypeStr(tracing::EventType type) {
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switch(type) {
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case tracing::EventType::Complete:
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return "X";
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case tracing::EventType::Begin:
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return "B";
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case tracing::EventType::End:
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return "E";
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case EventType::AsyncBegin:
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return "b";
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case EventType::AsyncStep:
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return "n";
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case EventType::AsyncEnd:
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return "e";
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case EventType::Counter:
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return "C";
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default:
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UNREACHABLE("Invalid enum value!");
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return "";
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}
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}
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void writeTime(std::ofstream& out, std::uint64_t time) {
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// Save stream state
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auto flags = out.flags();
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out << std::fixed << std::setprecision(3);
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out << (time / 1000.);
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// and now restore it
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out.flags(flags);
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}
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void writeCompleteEvent(std::ofstream& out_str, const trace_event* evt) {
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Assertion(evt->type == EventType::Complete, "Event must be a complete event!");
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out_str << ",\"dur\":";
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writeTime(out_str, evt->duration);
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}
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}
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namespace tracing
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{
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TraceEventWriter::TraceEventWriter() : _out("tracing/trace.json") {
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_out << "[";
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}
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TraceEventWriter::~TraceEventWriter() {
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_out << "]\n";
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_out.close();
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}
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void TraceEventWriter::processEvent(const trace_event* event) {
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if (event->type == EventType::Complete) {
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if (event->duration < 1000) {
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// Discard events that are less than a millisecond long
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return;
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}
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}
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if (!_first_line) {
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_out << ",";
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}
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_out << "\n{\"tid\": " << event->tid << ",\"ts\":";
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writeTime(_out, event->timestamp);
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_out << ",\"pid\":";
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if (event->pid == GPU_PID) {
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_out << "\"GPU\"";
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}
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else {
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_out << event->pid;
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}
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if (event->scope != nullptr) {
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_out << ",\"cat\":\"" << event->scope->getName() << "\"";
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_out << ",\"id\":\"" << reinterpret_cast<const void*>(event->scope) << "\"";
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}
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_out << ",\"name\":\"" << event->category->getName() << "\",\"ph\":\"" << getTypeStr(event->type) << "\"";
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switch (event->type) {
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case EventType::Complete:
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writeCompleteEvent(_out, event);
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break;
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case EventType::Begin:
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case EventType::End:
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// Nothing to do here
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break;
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case EventType::AsyncBegin:
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case EventType::AsyncStep:
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case EventType::AsyncEnd:
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// Nothing to do here...
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break;
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case EventType::Counter: {
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auto flags = _out.flags();
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_out << std::fixed;
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_out << ",\"args\": {\"value\": " << event->value << "}";
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// and now restore it
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_out.flags(flags);
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break;
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}
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default:
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UNREACHABLE("Unhandled enum value! This function should not have been called with this value!");
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break;
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}
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_out << "}";
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_first_line = false;
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}
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}
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