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Introduce safeExit() helper (_exit() compatible with TSan)

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v2: add missing defines.h header
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
This commit is contained in:
Azat Khuzhin 2022-03-02 12:59:10 +03:00
parent 36dcdafc1c
commit 798da0c314
5 changed files with 28 additions and 35 deletions
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1
base/base/CMakeLists.txt
View File

@ -17,6 +17,7 @@ set (SRCS
terminalColors.cpp
errnoToString.cpp
StringRef.cpp
safeExit.cpp
)
if (ENABLE_REPLXX)

18
base/base/safeExit.cpp Normal file
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@ -0,0 +1,18 @@
#if defined(OS_LINUX)
# include <sys/syscall.h>
#endif
#include <unistd.h>
#include <base/safeExit.h>
#include <base/defines.h>
[[noreturn]] void safeExit(int code)
{
#if defined(THREAD_SANITIZER) && defined(OS_LINUX)
/// Thread sanitizer tries to do something on exit that we don't need if we want to exit immediately,
/// while connection handling threads are still run.
(void)syscall(SYS_exit_group, code);
__builtin_unreachable();
#else
_exit(code);
#endif
}

4
base/base/safeExit.h Normal file
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@ -0,0 +1,4 @@
#pragma once
/// _exit() with a workaround for TSan.
[[noreturn]] void safeExit(int code);

20
programs/keeper/Keeper.cpp
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@ -13,6 +13,7 @@
#include <base/logger_useful.h>
#include <base/ErrorHandlers.h>
#include <base/scope_guard.h>
#include <base/safeExit.h>
#include <Poco/Net/NetException.h>
#include <Poco/Net/TCPServerParams.h>
#include <Poco/Net/TCPServer.h>
@ -34,11 +35,6 @@
#include <Server/ProtocolServerAdapter.h>
#include <Server/KeeperTCPHandlerFactory.h>
#if defined(OS_LINUX)
# include <unistd.h>
# include <sys/syscall.h>
#endif
int mainEntryClickHouseKeeper(int argc, char ** argv)
{
@ -127,18 +123,6 @@ Poco::Net::SocketAddress makeSocketAddress(const std::string & host, UInt16 port
return socket_address;
}
[[noreturn]] void forceShutdown()
{
#if defined(THREAD_SANITIZER) && defined(OS_LINUX)
/// Thread sanitizer tries to do something on exit that we don't need if we want to exit immediately,
/// while connection handling threads are still run.
(void)syscall(SYS_exit_group, 0);
__builtin_unreachable();
#else
_exit(0);
#endif
}
std::string getUserName(uid_t user_id)
{
/// Try to convert user id into user name.
@ -474,7 +458,7 @@ int Keeper::main(const std::vector<std::string> & /*args*/)
if (current_connections)
{
LOG_INFO(log, "Will shutdown forcefully.");
forceShutdown();
safeExit(0);
}
});

20
programs/server/Server.cpp
View File

@ -22,6 +22,8 @@
#include <base/getMemoryAmount.h>
#include <base/errnoToString.h>
#include <base/coverage.h>
#include <base/getFQDNOrHostName.h>
#include <base/safeExit.h>
#include <Common/MemoryTracker.h>
#include <Common/ClickHouseRevision.h>
#include <Common/DNSResolver.h>
@ -31,7 +33,6 @@
#include <Common/StringUtils/StringUtils.h>
#include <Common/ZooKeeper/ZooKeeper.h>
#include <Common/ZooKeeper/ZooKeeperNodeCache.h>
#include <base/getFQDNOrHostName.h>
#include <Common/getMultipleKeysFromConfig.h>
#include <Common/getNumberOfPhysicalCPUCores.h>
#include <Common/getExecutablePath.h>
@ -95,8 +96,6 @@
# include <sys/mman.h>
# include <sys/ptrace.h>
# include <Common/hasLinuxCapability.h>
# include <unistd.h>
# include <sys/syscall.h>
#endif
#if USE_SSL
@ -505,19 +504,6 @@ void checkForUsersNotInMainConfig(
}
}
[[noreturn]] void forceShutdown()
{
#if defined(THREAD_SANITIZER) && defined(OS_LINUX)
/// Thread sanitizer tries to do something on exit that we don't need if we want to exit immediately,
/// while connection handling threads are still run.
(void)syscall(SYS_exit_group, 0);
__builtin_unreachable();
#else
_exit(0);
#endif
}
int Server::main(const std::vector<std::string> & /*args*/)
{
Poco::Logger * log = &logger();
@ -1527,7 +1513,7 @@ if (ThreadFuzzer::instance().isEffective())
/// Dump coverage here, because std::atexit callback would not be called.
dumpCoverageReportIfPossible();
LOG_INFO(log, "Will shutdown forcefully.");
forceShutdown();
safeExit(0);
}
});