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#pragma once
#ifdef OS_LINUX /// Because of 'sigqueue' functions and RT signals.
#include <mutex>
#include <Storages/IStorage.h>
namespace Poco
{
class Logger;
}
namespace DB
{
class Context;
/// Allows to introspect stack trace of all server threads.
/// It acts like an embedded debugger.
/// More than one instance of this table cannot be used.
class StorageSystemStackTrace final : public IStorage
{
public:
explicit StorageSystemStackTrace(const StorageID & table_id_);
String getName() const override { return "SystemStackTrace"; }
Pipe read(
const Names & column_names,
const StorageSnapshotPtr & storage_snapshot,
SelectQueryInfo & query_info,
ContextPtr context,
QueryProcessingStage::Enum processed_stage,
size_t max_block_size,
size_t num_streams) override;
bool isSystemStorage() const override { return true; }
protected:
mutable std::mutex mutex;
Poco::Logger * log;
};
}
#endif
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