mirror of
https://github.com/ClickHouse/ClickHouse.git
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162 lines
4.5 KiB
C++
162 lines
4.5 KiB
C++
#if defined(__ELF__) && !defined(__FreeBSD__)
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#include <Common/Dwarf.h>
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#include <Common/SymbolIndex.h>
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#include <Common/HashTable/HashMap.h>
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#include <Common/Arena.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypeString.h>
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#include <Functions/IFunctionImpl.h>
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#include <Functions/FunctionFactory.h>
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#include <IO/WriteBufferFromArena.h>
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#include <IO/WriteHelpers.h>
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#include <Access/AccessFlags.h>
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#include <Interpreters/Context.h>
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#include <mutex>
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#include <filesystem>
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#include <unordered_map>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_COLUMN;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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namespace
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{
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class FunctionAddressToLine : public IFunction
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{
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public:
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static constexpr auto name = "addressToLine";
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static FunctionPtr create(const Context & context)
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{
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context.checkAccess(AccessType::addressToLine);
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return std::make_shared<FunctionAddressToLine>();
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}
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String getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override
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{
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return 1;
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}
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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if (arguments.size() != 1)
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throw Exception("Function " + getName() + " needs exactly one argument; passed "
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+ toString(arguments.size()) + ".", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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const auto & type = arguments[0].type;
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if (!WhichDataType(type.get()).isUInt64())
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throw Exception("The only argument for function " + getName() + " must be UInt64. Found "
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+ type->getName() + " instead.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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return std::make_shared<DataTypeString>();
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}
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bool useDefaultImplementationForConstants() const override
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{
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return true;
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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const ColumnPtr & column = arguments[0].column;
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const ColumnUInt64 * column_concrete = checkAndGetColumn<ColumnUInt64>(column.get());
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if (!column_concrete)
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throw Exception("Illegal column " + column->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_COLUMN);
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const typename ColumnVector<UInt64>::Container & data = column_concrete->getData();
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auto result_column = ColumnString::create();
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for (size_t i = 0; i < input_rows_count; ++i)
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{
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StringRef res_str = implCached(data[i]);
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result_column->insertData(res_str.data, res_str.size);
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}
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return result_column;
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}
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private:
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struct Cache
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{
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std::mutex mutex;
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Arena arena;
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using Map = HashMap<uintptr_t, StringRef>;
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Map map;
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std::unordered_map<std::string, Dwarf> dwarfs;
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};
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mutable Cache cache;
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StringRef impl(uintptr_t addr) const
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{
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auto symbol_index_ptr = SymbolIndex::instance();
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const SymbolIndex & symbol_index = *symbol_index_ptr;
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if (const auto * object = symbol_index.findObject(reinterpret_cast<const void *>(addr)))
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{
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auto dwarf_it = cache.dwarfs.try_emplace(object->name, object->elf).first;
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if (!std::filesystem::exists(object->name))
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return {};
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Dwarf::LocationInfo location;
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std::vector<Dwarf::SymbolizedFrame> frames; // NOTE: not used in FAST mode.
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if (dwarf_it->second.findAddress(addr - uintptr_t(object->address_begin), location, Dwarf::LocationInfoMode::FAST, frames))
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{
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const char * arena_begin = nullptr;
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WriteBufferFromArena out(cache.arena, arena_begin);
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writeString(location.file.toString(), out);
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writeChar(':', out);
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writeIntText(location.line, out);
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return out.finish();
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}
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else
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{
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return object->name;
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}
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}
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else
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return {};
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}
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StringRef implCached(uintptr_t addr) const
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{
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Cache::Map::LookupResult it;
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bool inserted;
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std::lock_guard lock(cache.mutex);
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cache.map.emplace(addr, it, inserted);
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if (inserted)
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it->getMapped() = impl(addr);
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return it->getMapped();
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}
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};
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}
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void registerFunctionAddressToLine(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionAddressToLine>();
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}
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}
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#endif
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