platform_thread_freebsd.cc revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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
26namespace base {
27
28namespace {
29int 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
47void 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
63void 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
87void InitThreading() {}
88
89void InitOnThread() {}
90
91void TerminateOnThread() {}
92
93size_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
104