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Fix dbsim thread instrumentation for main thread

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The thread local ti_thread object was not initialized for main thread,
which caused ASAN to complain about wild pointer.

Fixed by assigning a thread local ti_thread object for main
thread too.
This commit is contained in:
Teemu Ollakka
2023-10-27 11:30:00 +03:00
committed by Denis Protivensky
parent ffe1ba7a5d
commit a5d95f0175
1 changed files with 25 additions and 27 deletions
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52
dbsim/db_threads.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2019 Codership Oy <info@codership.com>
* Copyright (C) 2019-2023 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
@ -113,12 +113,10 @@ namespace
::abort();
}
}
static inline int append_key(const char* name, const char* type)
{
key_vec.push_back(std::string(name) + "_" + type);
wsrep::log_info() << "Register key " << name << "_" << type
<< " with index " << (key_cnt + 1);
ops_map.push_back(std::vector<size_t>());
ops_map_sync.push_back(new std::mutex());
ops_map.back().resize(oc_max);
@ -175,21 +173,6 @@ namespace
void* args;
};
pthread_key_t this_thread_key;
struct this_thread_key_initializer
{
this_thread_key_initializer()
{
pthread_key_create(&this_thread_key, nullptr);
}
~this_thread_key_initializer()
{
pthread_key_delete(this_thread_key);
}
};
class ti_thread : public ti_obj
{
public:
@ -229,11 +212,7 @@ namespace
void retval(void* retval) { retval_ = retval; }
static ti_thread* self()
{
return reinterpret_cast<ti_thread*>(
pthread_getspecific(this_thread_key));
}
static ti_thread* self();
int setschedparam(int policy, const struct sched_param* param)
{
@ -256,6 +235,25 @@ namespace
bool detached_;
};
thread_local ti_thread* this_ti_thread = nullptr;
static bool main_thread_initializer()
{
const auto* main_thread_key
= reinterpret_cast<const wsrep::thread_service::thread_key*>(
append_key("main", "thread"));
static ti_thread main_thread(main_thread_key);
this_ti_thread = &main_thread;
return true;
}
static bool main_thread_init = main_thread_initializer();
ti_thread* ti_thread::self()
{
return this_ti_thread;
}
class ti_mutex : public ti_obj
{
public:
@ -472,12 +470,12 @@ static void* start_thread(void* args_ptr)
{
thread_args* ta(reinterpret_cast<thread_args*>(args_ptr));
ti_thread* thread = reinterpret_cast<ti_thread*>(ta->this_thread);
pthread_setspecific(this_thread_key, thread);
this_ti_thread = thread;
void* (*fn)(void*) = ta->fn;
void* args = ta->args;
delete ta;
void* ret = (*fn)(args);
pthread_setspecific(this_thread_key, nullptr);
this_ti_thread = nullptr;
// If we end here the thread returned instead of calling
// pthread_exit()
if (thread->detached())
@ -488,7 +486,7 @@ static void* start_thread(void* args_ptr)
WSREP_NORETURN
static void exit_thread(wsrep::thread_service::thread* thread, void* retval)
{
pthread_setspecific(this_thread_key, nullptr);
this_ti_thread = nullptr;
ti_thread* th(reinterpret_cast<ti_thread*>(thread));
th->retval(retval);
if (th->detached())