Added one more function for introspection

dbms/src/Common/StackTrace.cpp

@@ -240,8 +240,10 @@ std::string StackTrace::toStringImpl(const Frames & frames, size_t size)
 
     for (size_t i = 0; i < size; ++i)
     {
-        out << "#" << i << " " << frames[i] << " ";
-        auto symbol = symbol_index.findSymbol(frames[i]);
+        const void * addr = frames[i];
+
+        out << "#" << i << " " << addr << " ";
+        auto symbol = symbol_index.findSymbol(addr);
         if (symbol)
         {
             int status = 0;
@@ -252,14 +254,14 @@ std::string StackTrace::toStringImpl(const Frames & frames, size_t size)
 
         out << " ";
 
-        if (auto object = symbol_index.findObject(frames[i]))
+        if (auto object = symbol_index.findObject(addr))
         {
             if (std::filesystem::exists(object->name))
             {
                 auto dwarf_it = dwarfs.try_emplace(object->name, *object->elf).first;
 
                 DB::Dwarf::LocationInfo location;
-                if (dwarf_it->second.findAddress(uintptr_t(object->address_begin) + uintptr_t(frames[i]), location, DB::Dwarf::LocationInfoMode::FAST))
+                if (dwarf_it->second.findAddress(uintptr_t(addr) - uintptr_t(object->address_begin), location, DB::Dwarf::LocationInfoMode::FAST))
                     out << location.file.toString() << ":" << location.line;
                 else
                     out << object->name;

dbms/src/Functions/addressToLine.cpp

@@ -0,0 +1,146 @@
+#include <Common/Elf.h>
+#include <Common/Dwarf.h>
+#include <Common/SymbolIndex.h>
+#include <Common/HashTable/HashMap.h>
+#include <Common/Arena.h>
+#include <Columns/ColumnString.h>
+#include <Columns/ColumnsNumber.h>
+#include <DataTypes/DataTypeString.h>
+#include <Functions/IFunction.h>
+#include <Functions/FunctionHelpers.h>
+#include <Functions/FunctionFactory.h>
+#include <IO/WriteBufferFromArena.h>
+#include <IO/WriteHelpers.h>
+
+#include <mutex>
+#include <filesystem>
+#include <unordered_map>
+
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int ILLEGAL_COLUMN;
+    extern const int ILLEGAL_TYPE_OF_ARGUMENT;
+    extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
+}
+
+class FunctionAddressToLine : public IFunction
+{
+public:
+    static constexpr auto name = "addressToLine";
+    static FunctionPtr create(const Context &)
+    {
+        return std::make_shared<FunctionAddressToLine>();
+    }
+
+    String getName() const override
+    {
+        return name;
+    }
+
+    size_t getNumberOfArguments() const override
+    {
+        return 1;
+    }
+
+    DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
+    {
+        if (arguments.size() != 1)
+            throw Exception("Function " + getName() + " needs exactly one argument; passed "
+                + toString(arguments.size()) + ".", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
+
+        const auto & type = arguments[0].type;
+
+        if (!WhichDataType(type.get()).isUInt64())
+            throw Exception("The only argument for function " + getName() + " must be UInt64. Found "
+                + type->getName() + " instead.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
+
+        return std::make_shared<DataTypeString>();
+    }
+
+    bool useDefaultImplementationForConstants() const override
+    {
+        return true;
+    }
+
+    void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t input_rows_count) override
+    {
+        const ColumnPtr & column = block.getByPosition(arguments[0]).column;
+        const ColumnUInt64 * column_concrete = checkAndGetColumn<ColumnUInt64>(column.get());
+
+        if (!column_concrete)
+            throw Exception("Illegal column " + column->getName() + " of argument of function " + getName(), ErrorCodes::ILLEGAL_COLUMN);
+
+        const typename ColumnVector<UInt64>::Container & data = column_concrete->getData();
+        auto result_column = ColumnString::create();
+
+        for (size_t i = 0; i < input_rows_count; ++i)
+        {
+            StringRef res_str = implCached(data[i]);
+            result_column->insertData(res_str.data, res_str.size);
+        }
+
+        block.getByPosition(result).column = std::move(result_column);
+    }
+
+private:
+    std::mutex mutex;
+    Arena arena;
+    using Map = HashMap<uintptr_t, StringRef>;
+    Map map;
+    std::unordered_map<std::string, Dwarf> dwarfs;
+
+    StringRef impl(uintptr_t addr)
+    {
+        const SymbolIndex & symbol_index = SymbolIndex::instance();
+
+        if (auto object = symbol_index.findObject(reinterpret_cast<const void *>(addr)))
+        {
+            auto dwarf_it = dwarfs.try_emplace(object->name, *object->elf).first;
+            if (!std::filesystem::exists(object->name))
+                return {};
+
+            Dwarf::LocationInfo location;
+            if (dwarf_it->second.findAddress(addr - uintptr_t(object->address_begin), location, Dwarf::LocationInfoMode::FAST))
+            {
+                const char * arena_begin = nullptr;
+                WriteBufferFromArena out(arena, arena_begin);
+
+                writeString(location.file.toString(), out);
+                writeChar(':', out);
+                writeIntText(location.line, out);
+
+                StringRef out_str = out.finish();
+                out_str.data = arena.insert(out_str.data, out_str.size);
+                return out_str;
+            }
+            else
+            {
+                return object->name;
+            }
+        }
+        else
+            return {};
+    }
+
+    StringRef implCached(uintptr_t addr)
+    {
+        Map::iterator it;
+        bool inserted;
+        std::lock_guard lock(mutex);
+        map.emplace(addr, it, inserted);
+        if (inserted)
+            it->getSecond() = impl(addr);
+        return it->getSecond();
+    }
+};
+
+void registerFunctionAddressToLine(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionAddressToLine>();
+}
+
+}

dbms/src/Functions/registerFunctionsIntrospection.cpp

@@ -5,11 +5,13 @@ class FunctionFactory;
 
 void registerFunctionSymbolizeAddress(FunctionFactory & factory);
 void registerFunctionDemangle(FunctionFactory & factory);
+void registerFunctionAddressToLine(FunctionFactory & factory);
 
 void registerFunctionsIntrospection(FunctionFactory & factory)
 {
     registerFunctionSymbolizeAddress(factory);
     registerFunctionDemangle(factory);
+    registerFunctionAddressToLine(factory);
 }
 
 }