1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/threading/thread_id_name_manager.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,113 @@
1.4 +// Copyright (c) 2012 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#include "base/threading/thread_id_name_manager.h"
1.9 +
1.10 +#include <stdlib.h>
1.11 +#include <string.h>
1.12 +
1.13 +#include "base/logging.h"
1.14 +#include "base/memory/singleton.h"
1.15 +#include "base/strings/string_util.h"
1.16 +
1.17 +namespace base {
1.18 +namespace {
1.19 +
1.20 +static const char kDefaultName[] = "";
1.21 +static std::string* g_default_name;
1.22 +
1.23 +}
1.24 +
1.25 +ThreadIdNameManager::ThreadIdNameManager()
1.26 + : main_process_name_(NULL),
1.27 + main_process_id_(kInvalidThreadId) {
1.28 + g_default_name = new std::string(kDefaultName);
1.29 +
1.30 + AutoLock locked(lock_);
1.31 + name_to_interned_name_[kDefaultName] = g_default_name;
1.32 +}
1.33 +
1.34 +ThreadIdNameManager::~ThreadIdNameManager() {
1.35 +}
1.36 +
1.37 +ThreadIdNameManager* ThreadIdNameManager::GetInstance() {
1.38 + return Singleton<ThreadIdNameManager,
1.39 + LeakySingletonTraits<ThreadIdNameManager> >::get();
1.40 +}
1.41 +
1.42 +const char* ThreadIdNameManager::GetDefaultInternedString() {
1.43 + return g_default_name->c_str();
1.44 +}
1.45 +
1.46 +void ThreadIdNameManager::RegisterThread(PlatformThreadHandle::Handle handle,
1.47 + PlatformThreadId id) {
1.48 + AutoLock locked(lock_);
1.49 + thread_id_to_handle_[id] = handle;
1.50 + thread_handle_to_interned_name_[handle] =
1.51 + name_to_interned_name_[kDefaultName];
1.52 +}
1.53 +
1.54 +void ThreadIdNameManager::SetName(PlatformThreadId id, const char* name) {
1.55 + std::string str_name(name);
1.56 +
1.57 + AutoLock locked(lock_);
1.58 + NameToInternedNameMap::iterator iter = name_to_interned_name_.find(str_name);
1.59 + std::string* leaked_str = NULL;
1.60 + if (iter != name_to_interned_name_.end()) {
1.61 + leaked_str = iter->second;
1.62 + } else {
1.63 + leaked_str = new std::string(str_name);
1.64 + name_to_interned_name_[str_name] = leaked_str;
1.65 + }
1.66 +
1.67 + ThreadIdToHandleMap::iterator id_to_handle_iter =
1.68 + thread_id_to_handle_.find(id);
1.69 +
1.70 + // The main thread of a process will not be created as a Thread object which
1.71 + // means there is no PlatformThreadHandler registered.
1.72 + if (id_to_handle_iter == thread_id_to_handle_.end()) {
1.73 + main_process_name_ = leaked_str;
1.74 + main_process_id_ = id;
1.75 + return;
1.76 + }
1.77 + thread_handle_to_interned_name_[id_to_handle_iter->second] = leaked_str;
1.78 +}
1.79 +
1.80 +const char* ThreadIdNameManager::GetName(PlatformThreadId id) {
1.81 + AutoLock locked(lock_);
1.82 +
1.83 + if (id == main_process_id_)
1.84 + return main_process_name_->c_str();
1.85 +
1.86 + ThreadIdToHandleMap::iterator id_to_handle_iter =
1.87 + thread_id_to_handle_.find(id);
1.88 + if (id_to_handle_iter == thread_id_to_handle_.end())
1.89 + return name_to_interned_name_[kDefaultName]->c_str();
1.90 +
1.91 + ThreadHandleToInternedNameMap::iterator handle_to_name_iter =
1.92 + thread_handle_to_interned_name_.find(id_to_handle_iter->second);
1.93 + return handle_to_name_iter->second->c_str();
1.94 +}
1.95 +
1.96 +void ThreadIdNameManager::RemoveName(PlatformThreadHandle::Handle handle,
1.97 + PlatformThreadId id) {
1.98 + AutoLock locked(lock_);
1.99 + ThreadHandleToInternedNameMap::iterator handle_to_name_iter =
1.100 + thread_handle_to_interned_name_.find(handle);
1.101 +
1.102 + DCHECK(handle_to_name_iter != thread_handle_to_interned_name_.end());
1.103 + thread_handle_to_interned_name_.erase(handle_to_name_iter);
1.104 +
1.105 + ThreadIdToHandleMap::iterator id_to_handle_iter =
1.106 + thread_id_to_handle_.find(id);
1.107 + DCHECK((id_to_handle_iter!= thread_id_to_handle_.end()));
1.108 + // The given |id| may have been re-used by the system. Make sure the
1.109 + // mapping points to the provided |handle| before removal.
1.110 + if (id_to_handle_iter->second != handle)
1.111 + return;
1.112 +
1.113 + thread_id_to_handle_.erase(id_to_handle_iter);
1.114 +}
1.115 +
1.116 +} // namespace base
