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#pragma once
#include <Common/PipeFDs.h>
#include <Common/ProfileEvents.h>
#include <base/types.h>
class StackTrace;
namespace DB
{
class TraceCollector;
enum class TraceType : uint8_t
{
Real,
CPU,
Memory,
MemorySample,
MemoryPeak,
ProfileEvent,
};
/// This is the second part of TraceCollector, that sends stacktrace to the pipe.
/// It has been split out to avoid dependency from interpreters part.
class TraceSender
{
public:
struct Extras
{
/// size, ptr - for memory tracing is the amount of memory allocated; for other trace types it is 0.
Int64 size{};
void * ptr = nullptr;
/// Event type and increment for 'ProfileEvent' trace type; for other trace types defaults.
ProfileEvents::Event event{ProfileEvents::end()};
ProfileEvents::Count increment{};
};
/// Collect a stack trace. This method is signal safe.
/// Precondition: the TraceCollector object must be created.
static void send(TraceType trace_type, const StackTrace & stack_trace, Extras extras);
private:
friend class TraceCollector;
static LazyPipeFDs pipe;
};
}
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