Line data    Source code

       1             : // Copyright (c) 2018-2022 The Bitcoin Core developers
       2             : // Distributed under the MIT software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #if defined(HAVE_CONFIG_H)
       6             : #include <config/bitcoin-config.h>
       7             : #endif
       8             : 
       9             : #include <string>
      10             : #include <thread>
      11             : #include <utility>
      12             : 
      13             : #if (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
      14             : #include <pthread.h>
      15             : #include <pthread_np.h>
      16             : #endif
      17             : 
      18             : #include <util/threadnames.h>
      19             : 
      20             : #ifdef HAVE_SYS_PRCTL_H
      21             : #include <sys/prctl.h>
      22             : #endif
      23             : 
      24             : //! Set the thread's name at the process level. Does not affect the
      25             : //! internal name.
      26           4 : static void SetThreadName(const char* name)
      27             : {
      28             : #if defined(PR_SET_NAME)
      29             :     // Only the first 15 characters are used (16 - NUL terminator)
      30           4 :     ::prctl(PR_SET_NAME, name, 0, 0, 0);
      31             : #elif (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
      32             :     pthread_set_name_np(pthread_self(), name);
      33             : #elif defined(MAC_OSX)
      34             :     pthread_setname_np(name);
      35             : #else
      36             :     // Prevent warnings for unused parameters...
      37             :     (void)name;
      38             : #endif
      39           4 : }
      40             : 
      41             : // If we have thread_local, just keep thread ID and name in a thread_local
      42             : // global.
      43             : #if defined(HAVE_THREAD_LOCAL)
      44             : 
      45           4 : static thread_local std::string g_thread_name;
      46           1 : const std::string& util::ThreadGetInternalName() { return g_thread_name; }
      47             : //! Set the in-memory internal name for this thread. Does not affect the process
      48             : //! name.
      49           4 : static void SetInternalName(std::string name) { g_thread_name = std::move(name); }
      50             : 
      51             : // Without thread_local available, don't handle internal name at all.
      52             : #else
      53             : 
      54             : static const std::string empty_string;
      55             : const std::string& util::ThreadGetInternalName() { return empty_string; }
      56             : static void SetInternalName(std::string name) { }
      57             : #endif
      58             : 
      59           4 : void util::ThreadRename(std::string&& name)
      60             : {
      61           4 :     SetThreadName(("b-" + name).c_str());
      62           4 :     SetInternalName(std::move(name));
      63           4 : }
      64             : 
      65           0 : void util::ThreadSetInternalName(std::string&& name)
      66             : {
      67           0 :     SetInternalName(std::move(name));
      68           0 : }