mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 05:22:17 +00:00
265 lines
6.7 KiB
C++
265 lines
6.7 KiB
C++
#include <stdio.h>
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#include <Poco/DirectoryIterator.h>
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#include <Yandex/Revision.h>
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#include <statdaemons/ext/unlock_guard.hpp>
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#include <DB/Common/SipHash.h>
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#include <DB/IO/Operators.h>
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#include <DB/IO/WriteBufferFromString.h>
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/IO/ReadBufferFromFileDescriptor.h>
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#include <DB/IO/copyData.h>
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#include <DB/IO/WriteBufferFromFile.h>
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#include <DB/Interpreters/Compiler.h>
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namespace DB
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{
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Compiler::Compiler(const std::string & path_, size_t threads)
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: path(path_), pool(threads)
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{
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Poco::File(path).createDirectory();
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Poco::DirectoryIterator dir_end;
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for (Poco::DirectoryIterator dir_it(path); dir_end != dir_it; ++dir_it)
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{
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std::string name = dir_it.name();
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if (name.length() > strlen(".so") && 0 == name.compare(name.size() - 3, 3, ".so"))
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{
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files.insert(name.substr(0, name.size() - 3));
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}
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}
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LOG_INFO(log, "Having " << files.size() << " compiled files from previous start.");
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}
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Compiler::~Compiler()
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{
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LOG_DEBUG(log, "Waiting for threads to finish.");
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pool.wait();
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}
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static Compiler::HashedKey getHash(const std::string & key)
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{
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SipHash hash;
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auto revision = Revision::get();
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hash.update(reinterpret_cast<const char *>(&revision), sizeof(revision));
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hash.update(key.data(), key.size());
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Compiler::HashedKey res;
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hash.get128(res.first, res.second);
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return res;
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}
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/// Без расширения .so.
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static std::string hashedKeyToFileName(Compiler::HashedKey hashed_key)
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{
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std::string file_name;
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{
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WriteBufferFromString out(file_name);
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out << hashed_key.first << '_' << hashed_key.second;
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}
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return file_name;
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}
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SharedLibraryPtr Compiler::getOrCount(
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const std::string & key,
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UInt32 min_count_to_compile,
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const std::string & additional_compiler_flags,
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CodeGenerator get_code,
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ReadyCallback on_ready)
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{
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HashedKey hashed_key = getHash(key);
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std::lock_guard<std::mutex> lock(mutex);
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UInt32 count = ++counts[hashed_key];
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/// Есть готовая открытая библиотека? Или, если библиотека в процессе компиляции, там будет nullptr.
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Libraries::iterator it = libraries.find(hashed_key);
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if (libraries.end() != it)
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{
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if (!it->second)
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LOG_INFO(log, "Library " << hashedKeyToFileName(hashed_key) << " is already compiling or compilation was failed.");
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/// TODO В этом случае, после окончания компиляции, не будет дёрнут колбэк.
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return it->second;
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}
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/// Есть файл с библиотекой, оставшийся от предыдущего запуска?
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std::string file_name = hashedKeyToFileName(hashed_key);
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if (files.count(file_name))
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{
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std::string so_file_path = path + '/' + file_name + ".so";
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LOG_INFO(log, "Loading existing library " << so_file_path);
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SharedLibraryPtr lib(new SharedLibrary(so_file_path));
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libraries[hashed_key] = lib;
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return lib;
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}
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/// Достигнуто ли min_count_to_compile?
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if (count >= min_count_to_compile)
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{
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/// Значение min_count_to_compile, равное нулю, обозначает необходимость синхронной компиляции.
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/// Есть ли свободные потоки.
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if (min_count_to_compile == 0 || pool.active() < pool.size())
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{
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/// Обозначает, что библиотека в процессе компиляции.
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libraries[hashed_key] = nullptr;
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LOG_INFO(log, "Compiling code " << file_name << ", key: " << key);
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if (min_count_to_compile == 0)
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{
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{
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ext::unlock_guard<std::mutex> unlock(mutex);
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compile(hashed_key, file_name, additional_compiler_flags, get_code, on_ready);
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}
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return libraries[hashed_key];
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}
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else
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{
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pool.schedule([=]
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{
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try
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{
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compile(hashed_key, file_name, additional_compiler_flags, get_code, on_ready);
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}
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catch (...)
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{
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tryLogCurrentException("Compiler");
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}
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});
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}
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}
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else
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LOG_INFO(log, "All threads are busy.");
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}
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return nullptr;
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}
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struct Pipe : private boost::noncopyable
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{
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FILE * f;
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Pipe(const std::string & command)
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{
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errno = 0;
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f = popen(command.c_str(), "r");
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if (!f)
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throwFromErrno("Cannot popen");
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}
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~Pipe()
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{
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try
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{
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errno = 0;
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if (f && -1 == pclose(f))
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throwFromErrno("Cannot pclose");
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}
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catch (...)
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{
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tryLogCurrentException("Pipe");
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}
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}
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};
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void Compiler::compile(
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HashedKey hashed_key,
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std::string file_name,
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const std::string & additional_compiler_flags,
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CodeGenerator get_code,
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ReadyCallback on_ready)
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{
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std::string prefix = path + "/" + file_name;
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std::string cpp_file_path = prefix + ".cpp";
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std::string so_file_path = prefix + ".so";
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{
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WriteBufferFromFile out(cpp_file_path);
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out << get_code();
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}
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std::stringstream command;
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/// Слегка неудобно.
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command <<
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"LD_LIBRARY_PATH=/usr/share/clickhouse/bin/"
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" /usr/share/clickhouse/bin/clang"
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" -x c++ -std=gnu++11 -O3 -g -Wall -Werror -Wnon-virtual-dtor -march=native -D NDEBUG"
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" -shared -fPIC -fvisibility=hidden -fno-implement-inlines"
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" -isystem /usr/share/clickhouse/headers/usr/local/include/"
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" -isystem /usr/share/clickhouse/headers/usr/include/"
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" -isystem /usr/share/clickhouse/headers/usr/include/c++/*/"
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" -isystem /usr/share/clickhouse/headers/usr/include/x86_64-linux-gnu/"
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" -isystem /usr/share/clickhouse/headers/usr/include/x86_64-linux-gnu/c++/*/"
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" -isystem /usr/share/clickhouse/headers/usr/local/lib/clang/*/include/"
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" -I /usr/share/clickhouse/headers/dbms/include/"
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" -I /usr/share/clickhouse/headers/libs/libcityhash/"
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" -I /usr/share/clickhouse/headers/libs/libcommon/include/"
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" -I /usr/share/clickhouse/headers/libs/libdouble-conversion/"
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" -I /usr/share/clickhouse/headers/libs/libmysqlxx/include/"
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" -I /usr/share/clickhouse/headers/libs/libstatdaemons/include/"
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" -I /usr/share/clickhouse/headers/libs/libstats/include/"
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" " << additional_compiler_flags <<
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" -o " << so_file_path << " " << cpp_file_path
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<< " 2>&1 || echo Exit code: $?";
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std::string compile_result;
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{
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Pipe pipe(command.str());
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int pipe_fd = fileno(pipe.f);
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if (-1 == pipe_fd)
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throwFromErrno("Cannot fileno");
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{
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ReadBufferFromFileDescriptor command_output(pipe_fd);
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WriteBufferFromString res(compile_result);
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copyData(command_output, res);
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}
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}
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if (!compile_result.empty())
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throw Exception("Cannot compile code:\n\n" + command.str() + "\n\n" + compile_result);
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/// Если до этого была ошибка, то файл с кодом остаётся для возможности просмотра.
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Poco::File(cpp_file_path).remove();
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SharedLibraryPtr lib(new SharedLibrary(so_file_path));
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{
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std::lock_guard<std::mutex> lock(mutex);
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libraries[hashed_key] = lib;
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}
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LOG_INFO(log, "Compiled code " << file_name);
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on_ready(lib);
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}
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}
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