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/memory/scoped_ptr.h"
  13 #include "base/safe_strerror_posix.h"
  14 #include "base/threading/thread_id_name_manager.h"
  15 #include "base/threading/thread_restrictions.h"
  16 #include "base/tracked_objects.h"
  17
  18 #if !defined(OS_NACL)
  19 #include <sys/resource.h>
  20 #include <sys/syscall.h>
  21 #include <sys/time.h>
  22 #include <sys/types.h>
  23 #include <unistd.h>
  24 #endif
  25
  26 namespace base {
  27
  28 namespace {
  29 int ThreadNiceValue(ThreadPriority priority) {
  30   switch (priority) {
  31     case kThreadPriority_RealtimeAudio:
  32       return -10;
  33     case kThreadPriority_Background:
  34       return 10;
  35     case kThreadPriority_Normal:
  36       return 0;
  37     case kThreadPriority_Display:
  38       return -6;
  39     default:
  40       NOTREACHED() << "Unknown priority.";
  41       return 0;
  42   }
  43 }
  44 } // namespace
  45
  46 // static
  47 void PlatformThread::SetName(const char* name) {
  48   ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
  49   tracked_objects::ThreadData::InitializeThreadContext(name);
  50
  51 #if !defined(OS_NACL)
  52   // On FreeBSD we can get the thread names to show up in the debugger by
  53   // setting the process name for the LWP.  We don't want to do this for the
  54   // main thread because that would rename the process, causing tools like
  55   // killall to stop working.
  56   if (PlatformThread::CurrentId() == getpid())
  57     return;
  58   setproctitle("%s", name);
  59 #endif  //  !defined(OS_NACL)
  60 }
  61
  62 // static
  63 void PlatformThread::SetThreadPriority(PlatformThreadHandle handle,
  64                                        ThreadPriority priority) {
  65 #if !defined(OS_NACL)
  66   if (priority == kThreadPriority_RealtimeAudio) {
  67     const struct sched_param kRealTimePrio = { 8 };
  68     if (pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0) {
  69       // Got real time priority, no need to set nice level.
  70       return;
  71     }
  72   }
  73
  74   // setpriority(2) will set a thread's priority if it is passed a tid as
  75   // the 'process identifier', not affecting the rest of the threads in the
  76   // process. Setting this priority will only succeed if the user has been
  77   // granted permission to adjust nice values on the system.
  78   DCHECK_NE(handle.id_, kInvalidThreadId);
  79   const int kNiceSetting = ThreadNiceValue(priority);
  80   if (setpriority(PRIO_PROCESS, handle.id_, kNiceSetting)) {
  81     DVPLOG(1) << "Failed to set nice value of thread ("
  82               << handle.id_ << ") to " << kNiceSetting;
  83   }
  84 #endif  //  !defined(OS_NACL)
  85 }
  86
  87 void InitThreading() {}
  88
  89 void InitOnThread() {}
  90
  91 void TerminateOnThread() {}
  92
  93 size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
  94 #if !defined(THREAD_SANITIZER)
  95   return 0;
  96 #else
  97   // ThreadSanitizer bloats the stack heavily. Evidence has been that the
  98   // default stack size isn't enough for some browser tests.
  99   return 2 * (1 << 23);  // 2 times 8192K (the default stack size on Linux).
 100 #endif
 101 }
 102
 103 }  // namespace base