mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-11 17:02:25 +00:00
326 lines
8.5 KiB
C++
326 lines
8.5 KiB
C++
#include <signal.h>
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#include <setjmp.h>
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#include <unistd.h>
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#include <new>
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#include <iostream>
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#include <vector>
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#include <string>
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#include <utility> /// pair
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#if !defined(ARCADIA_BUILD)
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# include "config_tools.h"
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#endif
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#include <Common/StringUtils/StringUtils.h>
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#include <common/phdr_cache.h>
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#include <ext/scope_guard.h>
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/// Universal executable for various clickhouse applications
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#if ENABLE_CLICKHOUSE_SERVER
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int mainEntryClickHouseServer(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_CLIENT
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int mainEntryClickHouseClient(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_LOCAL
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int mainEntryClickHouseLocal(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_BENCHMARK
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int mainEntryClickHouseBenchmark(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_EXTRACT_FROM_CONFIG
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int mainEntryClickHouseExtractFromConfig(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_COMPRESSOR
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int mainEntryClickHouseCompressor(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_FORMAT
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int mainEntryClickHouseFormat(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_COPIER
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int mainEntryClickHouseClusterCopier(int argc, char ** argv);
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#endif
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#if ENABLE_CLICKHOUSE_OBFUSCATOR
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int mainEntryClickHouseObfuscator(int argc, char ** argv);
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#endif
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namespace
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{
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using MainFunc = int (*)(int, char**);
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/// Add an item here to register new application
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std::pair<const char *, MainFunc> clickhouse_applications[] =
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{
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#if ENABLE_CLICKHOUSE_LOCAL
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{"local", mainEntryClickHouseLocal},
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#endif
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#if ENABLE_CLICKHOUSE_CLIENT
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{"client", mainEntryClickHouseClient},
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#endif
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#if ENABLE_CLICKHOUSE_BENCHMARK
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{"benchmark", mainEntryClickHouseBenchmark},
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#endif
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#if ENABLE_CLICKHOUSE_SERVER
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{"server", mainEntryClickHouseServer},
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#endif
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#if ENABLE_CLICKHOUSE_EXTRACT_FROM_CONFIG
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{"extract-from-config", mainEntryClickHouseExtractFromConfig},
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#endif
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#if ENABLE_CLICKHOUSE_COMPRESSOR
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{"compressor", mainEntryClickHouseCompressor},
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#endif
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#if ENABLE_CLICKHOUSE_FORMAT
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{"format", mainEntryClickHouseFormat},
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#endif
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#if ENABLE_CLICKHOUSE_COPIER
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{"copier", mainEntryClickHouseClusterCopier},
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#endif
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#if ENABLE_CLICKHOUSE_OBFUSCATOR
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{"obfuscator", mainEntryClickHouseObfuscator},
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#endif
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};
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int printHelp(int, char **)
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{
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std::cerr << "Use one of the following commands:" << std::endl;
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for (auto & application : clickhouse_applications)
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std::cerr << "clickhouse " << application.first << " [args] " << std::endl;
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return -1;
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}
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bool isClickhouseApp(const std::string & app_suffix, std::vector<char *> & argv)
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{
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/// Use app if the first arg 'app' is passed (the arg should be quietly removed)
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if (argv.size() >= 2)
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{
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auto first_arg = argv.begin() + 1;
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/// 'clickhouse --client ...' and 'clickhouse client ...' are Ok
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if (*first_arg == "--" + app_suffix || *first_arg == app_suffix)
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{
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argv.erase(first_arg);
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return true;
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}
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}
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/// Use app if clickhouse binary is run through symbolic link with name clickhouse-app
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std::string app_name = "clickhouse-" + app_suffix;
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return !argv.empty() && (app_name == argv[0] || endsWith(argv[0], "/" + app_name));
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}
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enum class InstructionFail
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{
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NONE = 0,
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SSE3 = 1,
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SSSE3 = 2,
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SSE4_1 = 3,
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SSE4_2 = 4,
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POPCNT = 5,
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AVX = 6,
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AVX2 = 7,
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AVX512 = 8
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};
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const char * instructionFailToString(InstructionFail fail)
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{
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switch (fail)
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{
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case InstructionFail::NONE:
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return "NONE";
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case InstructionFail::SSE3:
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return "SSE3";
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case InstructionFail::SSSE3:
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return "SSSE3";
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case InstructionFail::SSE4_1:
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return "SSE4.1";
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case InstructionFail::SSE4_2:
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return "SSE4.2";
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case InstructionFail::POPCNT:
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return "POPCNT";
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case InstructionFail::AVX:
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return "AVX";
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case InstructionFail::AVX2:
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return "AVX2";
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case InstructionFail::AVX512:
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return "AVX512";
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}
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__builtin_unreachable();
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}
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sigjmp_buf jmpbuf;
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[[noreturn]] void sigIllCheckHandler(int, siginfo_t *, void *)
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{
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siglongjmp(jmpbuf, 1);
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}
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/// Check if necessary SSE extensions are available by trying to execute some sse instructions.
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/// If instruction is unavailable, SIGILL will be sent by kernel.
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void checkRequiredInstructionsImpl(volatile InstructionFail & fail)
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{
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#if defined(__SSE3__)
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fail = InstructionFail::SSE3;
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__asm__ volatile ("addsubpd %%xmm0, %%xmm0" : : : "xmm0");
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#endif
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#if defined(__SSSE3__)
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fail = InstructionFail::SSSE3;
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__asm__ volatile ("pabsw %%xmm0, %%xmm0" : : : "xmm0");
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#endif
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#if defined(__SSE4_1__)
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fail = InstructionFail::SSE4_1;
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__asm__ volatile ("pmaxud %%xmm0, %%xmm0" : : : "xmm0");
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#endif
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#if defined(__SSE4_2__)
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fail = InstructionFail::SSE4_2;
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__asm__ volatile ("pcmpgtq %%xmm0, %%xmm0" : : : "xmm0");
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#endif
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/// Defined by -msse4.2
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#if defined(__POPCNT__)
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fail = InstructionFail::POPCNT;
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{
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uint64_t a = 0;
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uint64_t b = 0;
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__asm__ volatile ("popcnt %1, %0" : "=r"(a) :"r"(b) :);
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}
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#endif
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#if defined(__AVX__)
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fail = InstructionFail::AVX;
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__asm__ volatile ("vaddpd %%ymm0, %%ymm0, %%ymm0" : : : "ymm0");
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#endif
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#if defined(__AVX2__)
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fail = InstructionFail::AVX2;
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__asm__ volatile ("vpabsw %%ymm0, %%ymm0" : : : "ymm0");
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#endif
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#if defined(__AVX512__)
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fail = InstructionFail::AVX512;
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__asm__ volatile ("vpabsw %%zmm0, %%zmm0" : : : "zmm0");
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#endif
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fail = InstructionFail::NONE;
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}
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/// This function is safe to use in static initializers.
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void writeError(const char * data, size_t size)
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{
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while (size != 0)
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{
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ssize_t res = ::write(STDERR_FILENO, data, size);
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if ((-1 == res || 0 == res) && errno != EINTR)
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_Exit(1);
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if (res > 0)
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{
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data += res;
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size -= res;
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}
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}
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}
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/// Check SSE and others instructions availability. Calls exit on fail.
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/// This function must be called as early as possible, even before main, because static initializers may use unavailable instructions.
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void checkRequiredInstructions()
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{
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struct sigaction sa{};
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struct sigaction sa_old{};
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sa.sa_sigaction = sigIllCheckHandler;
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sa.sa_flags = SA_SIGINFO;
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auto signal = SIGILL;
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if (sigemptyset(&sa.sa_mask) != 0
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|| sigaddset(&sa.sa_mask, signal) != 0
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|| sigaction(signal, &sa, &sa_old) != 0)
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{
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/// You may wonder about strlen.
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/// Typical implementation of strlen is using SSE4.2 or AVX2.
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/// But this is not the case because it's compiler builtin and is executed at compile time.
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const char * msg = "Can not set signal handler\n";
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writeError(msg, strlen(msg));
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_Exit(1);
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}
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volatile InstructionFail fail = InstructionFail::NONE;
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if (sigsetjmp(jmpbuf, 1))
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{
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const char * msg1 = "Instruction check fail. The CPU does not support ";
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writeError(msg1, strlen(msg1));
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const char * msg2 = instructionFailToString(fail);
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writeError(msg2, strlen(msg2));
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const char * msg3 = " instruction set.\n";
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writeError(msg3, strlen(msg3));
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_Exit(1);
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}
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checkRequiredInstructionsImpl(fail);
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if (sigaction(signal, &sa_old, nullptr))
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{
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const char * msg = "Can not set signal handler\n";
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writeError(msg, strlen(msg));
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_Exit(1);
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}
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}
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struct Checker { Checker() { checkRequiredInstructions(); } } checker;
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}
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/// This allows to implement assert to forbid initialization of a class in static constructors.
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/// Usage:
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///
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/// extern bool inside_main;
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/// class C { C() { assert(inside_main); } };
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bool inside_main = false;
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int main(int argc_, char ** argv_)
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{
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inside_main = true;
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SCOPE_EXIT({ inside_main = false; });
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/// Reset new handler to default (that throws std::bad_alloc)
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/// It is needed because LLVM library clobbers it.
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std::set_new_handler(nullptr);
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/// PHDR cache is required for query profiler to work reliably
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/// It also speed up exception handling, but exceptions from dynamically loaded libraries (dlopen)
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/// will work only after additional call of this function.
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updatePHDRCache();
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std::vector<char *> argv(argv_, argv_ + argc_);
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/// Print a basic help if nothing was matched
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MainFunc main_func = printHelp;
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for (auto & application : clickhouse_applications)
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{
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if (isClickhouseApp(application.first, argv))
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{
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main_func = application.second;
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break;
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}
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}
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return main_func(static_cast<int>(argv.size()), argv.data());
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}
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