1 files changed, 11 insertions, 0 deletions
diff --git a/WebCore/platform/Timer.cpp b/WebCore/platform/Timer.cpp
index 353a2a7..d4235d9 100644
--- a/WebCore/platform/Timer.cpp
+++ b/WebCore/platform/Timer.cpp
@@ -169,6 +169,9 @@ TimerBase::TimerBase()
     : m_nextFireTime(0)
     , m_repeatInterval(0)
     , m_heapIndex(-1)
+#ifndef NDEBUG
+    , m_thread(currentThread())
+#endif
 {
 }
 
@@ -180,12 +183,16 @@ TimerBase::~TimerBase()
 
 void TimerBase::start(double nextFireInterval, double repeatInterval)
 {
+    ASSERT(m_thread == currentThread());
+
     m_repeatInterval = repeatInterval;
     setNextFireTime(currentTime() + nextFireInterval);
 }
 
 void TimerBase::stop()
 {
+    ASSERT(m_thread == currentThread());
+
     m_repeatInterval = 0;
     setNextFireTime(0);
 
@@ -196,6 +203,8 @@ void TimerBase::stop()
 
 bool TimerBase::isActive() const
 {
+    ASSERT(m_thread == currentThread());
+
     return m_nextFireTime || timersReadyToFire().contains(this);
 }
 
@@ -284,6 +293,8 @@ void TimerBase::heapPopMin()
 
 void TimerBase::setNextFireTime(double newTime)
 {
+    ASSERT(m_thread == currentThread());
+
     // Keep heap valid while changing the next-fire time.
 
     timersReadyToFire().remove(this);