Thread 11 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () #4 0x0000000101006287 in nsEventQueue::GetEvent () Thread 10 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () #4 0x0000000101006287 in nsEventQueue::GetEvent () Thread 9 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () Thread 8 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () Thread 7 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () #4 0x0000000101006287 in nsEventQueue::GetEvent () Thread 6 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () #4 0x0000000101006287 in nsEventQueue::GetEvent () Thread 5 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010095b299 in XPCJSRuntime::WatchdogMain () Previous frame inner to this frame (gdb could not unwind past this frame) Thread 4 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x00000001011679a7 in js::GCHelperThread::threadLoop () Thread 3 (process 40850): #0 0x00007fff85f762da in mach_msg_trap () #1 0x00007fff85f7694d in mach_msg () #2 0x0000000100024abf in google_breakpad::ExceptionHandler::WaitForMessage () #3 0x00007fff85faf3e9 in thread_start () Thread 2 (process 40850): #0 0x00007fff85f8f16a in kevent () #1 0x00007fff85f9103d in _dispatch_mgr_invoke () #2 0x00007fff85f90d14 in _dispatch_queue_invoke () #3 0x00007fff85f9083e in _dispatch_worker_thread2 () #4 0x00007fff85f90168 in _pthread_wqthread () #5 0x00007fff85f90005 in start_wqthread () Thread 1 (process 40850): #0 0x00007fff85fb0fca in __semwait_signal () #1 0x00007fff85fb4de1 in _pthread_cond_wait () #2 0x000000010323b4fc in PR_WaitCondVar () #3 0x000000010323b567 in PR_Wait () #4 0x0000000101006287 in nsEventQueue::GetEvent ()