base/threading/platform_thread_freebsd.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/threading/platform_thread.h"
   6
   7 #include <errno.h>
   8 #include <sched.h>
   9
  10 #include "base/lazy_instance.h"
  11 #include "base/logging.h"
  12 #include "base/threading/thread_id_name_manager.h"
  13 #include "base/tracked_objects.h"
  14
  15 #if !defined(OS_NACL)
  16 #include <pthread.h>
  17 #include <sys/prctl.h>
  18 #include <sys/types.h>
  19 #include <unistd.h>
  20 #endif
  21
  22 namespace base {
  23
  24 namespace internal {
  25
  26 namespace {
  27 #if !defined(OS_NACL)
  28 const struct sched_param kRealTimePrio = {8};
  29 #endif
  30 }  // namespace
  31
  32 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = {
  33     {ThreadPriority::BACKGROUND, 10},
  34     {ThreadPriority::NORMAL, 0},
  35     {ThreadPriority::DISPLAY, -6},
  36     {ThreadPriority::REALTIME_AUDIO, -10},
  37 }
  38
  39 bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority) {
  40 #if !defined(OS_NACL)
  41   return priority == ThreadPriority::REALTIME_AUDIO &&
  42          pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0;
  43 #else
  44   return false;
  45 #endif
  46 }
  47
  48 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority) {
  49 #if !defined(OS_NACL)
  50   int maybe_sched_rr = 0;
  51   struct sched_param maybe_realtime_prio = {0};
  52   if (pthread_getschedparam(pthread_self(), &maybe_sched_rr,
  53                             &maybe_realtime_prio) == 0 &&
  54       maybe_sched_rr == SCHED_RR &&
  55       maybe_realtime_prio.sched_priority == kRealTimePrio.sched_priority) {
  56     *priority = ThreadPriority::REALTIME_AUDIO;
  57     return true;
  58   }
  59 #endif
  60   return false;
  61 }
  62
  63 }  // namespace internal
  64
  65 // static
  66 void PlatformThread::SetName(const std::string& name) {
  67   ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
  68   tracked_objects::ThreadData::InitializeThreadContext(name);
  69
  70 #if !defined(OS_NACL)
  71   // On FreeBSD we can get the thread names to show up in the debugger by
  72   // setting the process name for the LWP.  We don't want to do this for the
  73   // main thread because that would rename the process, causing tools like
  74   // killall to stop working.
  75   if (PlatformThread::CurrentId() == getpid())
  76     return;
  77   setproctitle("%s", name.c_str());
  78 #endif  //  !defined(OS_NACL)
  79 }
  80
  81 void InitThreading() {}
  82
  83 void InitOnThread() {}
  84
  85 void TerminateOnThread() {}
  86
  87 size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
  88 #if !defined(THREAD_SANITIZER)
  89   return 0;
  90 #else
  91   // ThreadSanitizer bloats the stack heavily. Evidence has been that the
  92   // default stack size isn't enough for some browser tests.
  93   return 2 * (1 << 23);  // 2 times 8192K (the default stack size on Linux).
  94 #endif
  95 }
  96
  97 }  // namespace base