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-rw-r--r--security/sandbox/chromium/base/threading/thread_restrictions.cc85
1 files changed, 85 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/threading/thread_restrictions.cc b/security/sandbox/chromium/base/threading/thread_restrictions.cc
new file mode 100644
index 000000000..00306c5ae
--- /dev/null
+++ b/security/sandbox/chromium/base/threading/thread_restrictions.cc
@@ -0,0 +1,85 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/threading/thread_restrictions.h"
+
+#if ENABLE_THREAD_RESTRICTIONS
+
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/threading/thread_local.h"
+
+namespace base {
+
+namespace {
+
+LazyInstance<ThreadLocalBoolean>::Leaky
+ g_io_disallowed = LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<ThreadLocalBoolean>::Leaky
+ g_singleton_disallowed = LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<ThreadLocalBoolean>::Leaky
+ g_wait_disallowed = LAZY_INSTANCE_INITIALIZER;
+
+} // namespace
+
+// static
+bool ThreadRestrictions::SetIOAllowed(bool allowed) {
+ bool previous_disallowed = g_io_disallowed.Get().Get();
+ g_io_disallowed.Get().Set(!allowed);
+ return !previous_disallowed;
+}
+
+// static
+void ThreadRestrictions::AssertIOAllowed() {
+ if (g_io_disallowed.Get().Get()) {
+ LOG(FATAL) <<
+ "Function marked as IO-only was called from a thread that "
+ "disallows IO! If this thread really should be allowed to "
+ "make IO calls, adjust the call to "
+ "base::ThreadRestrictions::SetIOAllowed() in this thread's "
+ "startup.";
+ }
+}
+
+// static
+bool ThreadRestrictions::SetSingletonAllowed(bool allowed) {
+ bool previous_disallowed = g_singleton_disallowed.Get().Get();
+ g_singleton_disallowed.Get().Set(!allowed);
+ return !previous_disallowed;
+}
+
+// static
+void ThreadRestrictions::AssertSingletonAllowed() {
+ if (g_singleton_disallowed.Get().Get()) {
+ LOG(FATAL) << "LazyInstance/Singleton is not allowed to be used on this "
+ << "thread. Most likely it's because this thread is not "
+ << "joinable, so AtExitManager may have deleted the object "
+ << "on shutdown, leading to a potential shutdown crash.";
+ }
+}
+
+// static
+void ThreadRestrictions::DisallowWaiting() {
+ g_wait_disallowed.Get().Set(true);
+}
+
+// static
+void ThreadRestrictions::AssertWaitAllowed() {
+ if (g_wait_disallowed.Get().Get()) {
+ LOG(FATAL) << "Waiting is not allowed to be used on this thread to prevent "
+ << "jank and deadlock.";
+ }
+}
+
+bool ThreadRestrictions::SetWaitAllowed(bool allowed) {
+ bool previous_disallowed = g_wait_disallowed.Get().Get();
+ g_wait_disallowed.Get().Set(!allowed);
+ return !previous_disallowed;
+}
+
+} // namespace base
+
+#endif // ENABLE_THREAD_RESTRICTIONS