.
Thread 3 (LWP 13030):
#0  0x00007ff299419757 in ioctl () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007ff293d2f364 in drmIoctl (fd=9, request=request@entry=1074553951, arg=arg@entry=0x7fff4f5e1b90) at ../xf86drm.c:167
        ret = <optimized out>
#2  0x00007ff29324c252 in drm_intel_gem_bo_map_gtt (bo=bo@entry=0x3b6c82a41780) at ../../intel/intel_bufmgr_gem.c:1292
        bufmgr_gem = 0x7ff2a1681000
        bo_gem = 0x3b6c82a41780
        set_domain = {handle = 204, read_domains = 64, write_domain = 64}
        ret = 0
#3  0x00007ff293a68698 in intel_miptree_map_raw (brw=brw@entry=0x3b6c81108030, mt=mt@entry=0x3b6c828bc340) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1648
        ctx = 0x3b6c81108030
        bo = 0x3b6c82a41780
#4  0x00007ff293a68e61 in intel_miptree_map_gtt (slice=0, level=0, map=0x3b6c86f07200, mt=0x3b6c828bc340, brw=0x3b6c81108030) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1682
        bh = 1
        image_y = <optimized out>
        y = 0
        bw = 1
        base = <optimized out>
        image_x = <optimized out>
        x = 112
#5  intel_miptree_map_singlesample (brw=0x3b6c81108030, mt=0x3b6c828bc340, level=0, slice=0, x=112, y=<optimized out>, w=1, h=16, mode=6, out_ptr=0x7fff4f5e1dd8, out_stride=0x7fff4f5e1dd4) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:2145
No locals.
#6  0x00007ff293a69cd1 in intel_miptree_map_multisample (out_stride=<optimized out>, out_ptr=<optimized out>, mode=<optimized out>, h=<optimized out>, w=<optimized out>, y=<optimized out>, x=<optimized out>, slice=<optimized out>, level=<optimized out>, mt=<optimized out>, brw=<optimized out>) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:2234
        ctx = <optimized out>
#7  intel_miptree_map (brw=<optimized out>, mt=<optimized out>, level=<optimized out>, slice=<optimized out>, x=32754, y=<optimized out>, w=2165342256, h=2168722368, mode=1, out_ptr=0x7000000006, out_stride=0x0) at ../../../../../../../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:2292
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 13036):
#0  0x00007ff29a9f9c3d in write () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007ff2a28a6c61 in IPC::Channel::ChannelImpl::ProcessOutgoingMessages (this=this@entry=0x3b6c7f8ad000) at ipc/ipc_channel_posix.cc:435
        eintr_wrapper_result = <optimized out>
        msg = 0x3b6c7fad7630
        amt_to_write = 142
        buf = '\000' <repeats 16 times>"\300, \225\003\223\362\177\000\000\001\000\000\000\000\000\000\000H9\350\177l;\000"
        bytes_written = <optimized out>
        fd_written = 3
        out_bytes = 0x3b6c8553ad00 "z"
        msgh = {msg_name = 0x0, msg_namelen = 0, msg_iov = 0x7ff2930393f0, msg_iovlen = 1, msg_control = 0x0, msg_controllen = 0, msg_flags = 0}
        iov = {iov_base = 0x3b6c8553ad00, iov_len = 142}
#2  0x00007ff2a28a75e8 in IPC::Channel::ChannelImpl::Send (this=0x3b6c7f8ad000, message=0x3b6c7fad7630) at ipc/ipc_channel_posix.cc:504
No locals.
#3  0x00007ff2a253220b in Run (this=0x7ff293039818) at ./base/callback.h:396
        f = <optimized out>
#4  base::MessageLoop::RunTask (this=this@entry=0x7ff2930399f0, pending_task=...) at base/message_loop/message_loop.cc:484
        program_counter = 0x7ff2a28b02a7 <IPC::SyncMessageFilter::Send(IPC::Message*)+439>
        start_time = {ms_ = 4359709}
        trace_event_unique_atomic463 = 140680165837093
        trace_event_unique_catstatic463 = <optimized out>
        trace_event_unique_profileScope463 = {p_data_ = 0x0, data_ = {category_group_enabled = 0x8 <Address 0x8 out of bounds>, name = 0x7ff293039b60 ""}}
#5  0x00007ff2a25334a0 in base::MessageLoop::DeferOrRunPendingTask (this=this@entry=0x7ff2930399f0, pending_task=...) at base/message_loop/message_loop.cc:496
No locals.
#6  0x00007ff2a2536685 in base::MessageLoop::DoWork (this=0x7ff2930399f0) at base/message_loop/message_loop.cc:688
        pending_task = {<base::TrackingInfo> = {birth_tally = 0x3b6c7fb651e0, time_posted = {ticks_ = 4359709757}, delayed_run_time = {ticks_ = 0}}, task = {<base::internal::CallbackBase> = {bind_state_ = {ptr_ = 0x3b6c7fb64270}, polymorphic_invoke_ = 0x7ff2a28afa40 <base::internal::Invoker<2, base::internal::BindState<base::internal::RunnableAdapter<void (IPC::SyncMessageFilter::*)(IPC::Message*)>, void (IPC::SyncMessageFilter*, IPC::Message*), void (IPC::SyncMessageFilter*, IPC::Message*)>, void (IPC::SyncMessageFilter*, IPC::Message*)>::Run(base::internal::BindStateBase*)>}, <No data fields>}, posted_from = {function_name_ = 0x7ff2a5ea7467 <IPC::SyncMessageFilter::Send(IPC::Message*)::__FUNCTION__> "Send", file_name_ = 0x7ff2a5ea7448 "ipc/ipc_sync_message_filter.cc", line_number_ = 35, program_counter_ = 0x7ff2a28b02a7 <IPC::SyncMessageFilter::Send(IPC::Message*)+439>}, sequence_num = 11649, nestable = true}
#7  0x00007ff2a250cdf8 in base::MessagePumpLibevent::Run (this=0x7ff2a17081e0, delegate=0x7ff2930399f0) at base/message_loop/message_pump_libevent.cc:232
        did_work = <optimized out>
        auto_reset_in_run = {scoped_variable_ = 0x7ff2a17081ed, original_value_ = false}
        timer_event = {impl_ = {data_ = {<base::DefaultDeleter<event>> = {<No data fields>}, ptr = 0x7ff2a171f680}}}
#8  0x00007ff2a25458ed in base::RunLoop::Run (this=0x7ff2930399b0) at base/run_loop.cc:45
No locals.
#9  0x00007ff2a2531735 in base::MessageLoop::Run (this=<optimized out>) at base/message_loop/message_loop.cc:321
        run_loop = {loop_ = 0x7ff2930399f0, weak_factory_ = {weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}, ptr_ = 0x7ff2930399b0}, previous_run_loop_ = 0x0, dispatcher_ = 0x0, run_depth_ = 1, run_called_ = true, quit_called_ = false, running_ = true, quit_when_idle_received_ = false}
#10 0x00007ff2a2556fdd in base::Thread::ThreadMain (this=0x7fff4f5e2d28) at base/threading/thread.cc:203
        message_loop = {<base::MessagePump::Delegate> = {_vptr.Delegate = 0x7ff2a7278e50 <vtable for base::MessageLoop+16>}, static kHighResolutionTimerModeLeaseTimeMs = 1000, pump_ = {ptr_ = 0x7ff2a17081e0}, type_ = base::MessageLoop::TYPE_IO, work_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x3b6c7f7fba00, _M_map_size = 8, _M_start = {_M_cur = 0x3b6c7e585d90, _M_first = 0x3b6c7e585c00, _M_last = 0x3b6c7e585de0, _M_node = 0x3b6c7f7fba20}, _M_finish = {_M_cur = 0x3b6c7e585d90, _M_first = 0x3b6c7e585c00, _M_last = 0x3b6c7e585de0, _M_node = 0x3b6c7f7fba20}}}, <No data fields>}}, <No data fields>}, delayed_work_queue_ = {c = {<std::_Vector_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}, comp = {<std::binary_function<base::PendingTask, base::PendingTask, bool>> = {<No data fields>}, <No data fields>}}, recent_time_ = {ticks_ = 0}, deferred_non_nestable_work_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x3b6c7f7fb900, _M_map_size = 8, _M_start = {_M_cur = 0x7ff2a1704a00, _M_first = 0x7ff2a1704a00, _M_last = 0x7ff2a1704be0, _M_node = 0x3b6c7f7fb918}, _M_finish = {_M_cur = 0x7ff2a1704a00, _M_first = 0x7ff2a1704a00, _M_last = 0x7ff2a1704be0, _M_node = 0x3b6c7f7fb918}}}, <No data fields>}}, <No data fields>}, destruction_observers_ = {<ObserverListBase<base::MessageLoop::DestructionObserver>> = {<base::SupportsWeakPtr<ObserverListBase<base::MessageLoop::DestructionObserver> >> = {<base::internal::SupportsWeakPtrBase> = {<No data fields>}, weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}}, observers_ = {<std::_Vector_base<base::MessageLoop::DestructionObserver*, std::allocator<base::MessageLoop::DestructionObserver*> >> = {_M_impl = {<std::allocator<base::MessageLoop::DestructionObserver*>> = {<__gnu_cxx::new_allocator<base::MessageLoop::DestructionObserver*>> = {<No data fields>}, <No data fields>}, _M_start = 0x3b6c7f847bc0, _M_finish = 0x3b6c7f847c00, _M_end_of_storage = 0x3b6c7f847c00}}, <No data fields>}, notify_depth_ = 0, type_ = ObserverListBase<base::MessageLoop::DestructionObserver>::NOTIFY_ALL}, <No data fields>}, nestable_tasks_allowed_ = false, exception_restoration_ = false, thread_name_ = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7ff2a16efca8 "Chrome_ChildIOThread"}}, message_histogram_ = 0x0, incoming_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x3b6c7f7fb940, _M_map_size = 8, _M_start = {_M_cur = 0x3b6c7fb7dd90, _M_first = 0x3b6c7fb7dc00, _M_last = 0x3b6c7fb7dde0, _M_node = 0x3b6c7f7fb970}, _M_finish = {_M_cur = 0x3b6c7fb7dd90, _M_first = 0x3b6c7fb7dc00, _M_last = 0x3b6c7fb7dde0, _M_node = 0x3b6c7f7fb970}}}, <No data fields>}}, <No data fields>}, incoming_queue_lock_ = {lock_ = {os_lock_ = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}}}, run_loop_ = 0x7ff2930399b0, next_sequence_num_ = 11650, task_observers_ = {<ObserverListBase<base::MessageLoop::TaskObserver>> = {<base::SupportsWeakPtr<ObserverListBase<base::MessageLoop::TaskObserver> >> = {<base::internal::SupportsWeakPtrBase> = {<No data fields>}, weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}}, observers_ = {<std::_Vector_base<base::MessageLoop::TaskObserver*, std::allocator<base::MessageLoop::TaskObserver*> >> = {_M_impl = {<std::allocator<base::MessageLoop::TaskObserver*>> = {<__gnu_cxx::new_allocator<base::MessageLoop::TaskObserver*>> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}, notify_depth_ = 0, type_ = ObserverListBase<base::MessageLoop::TaskObserver>::NOTIFY_ALL}, <No data fields>}, message_loop_proxy_ = {ptr_ = 0x3b6c7f7fb8c0}, thread_task_runner_handle_ = {impl_ = {data_ = {<base::DefaultDeleter<base::ThreadTaskRunnerHandle>> = {<No data fields>}, ptr = 0x7ff2a17533e0}}}}
#11 0x00007ff2a255369c in base::(anonymous namespace)::ThreadFunc (params=<optimized out>) at base/threading/platform_thread_posix.cc:80
        thread_params = <optimized out>
        delegate = 0x7fff4f5e2d28
#12 0x00007ff29a9f2f6e in start_thread (arg=0x7ff29303a700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7ff29303a700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140679825303296, 8372213842349675360, 0, 140680068427872, 140734524959264, 4096, -8370729191448226976, -8370747911500049568}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#13 0x00007ff299421e2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 1 (LWP 13035):
#0  content::GpuWatchdogThread::DeliberatelyTerminateToRecoverFromHang (this=0x7ff2a1665cf0) at content/gpu/gpu_watchdog_thread.cc:213
        terminated = false
#1  0x00007ff2a253220b in Run (this=0x7ff295de2838) at ./base/callback.h:396
        f = <optimized out>
#2  base::MessageLoop::RunTask (this=this@entry=0x7ff295de29f0, pending_task=...) at base/message_loop/message_loop.cc:484
        program_counter = 0x7ff2a2505f8c <content::GpuWatchdogThread::OnCheck(bool)+348>
        start_time = {ms_ = 4359709}
        trace_event_unique_atomic463 = 140680165837093
        trace_event_unique_catstatic463 = <optimized out>
        trace_event_unique_profileScope463 = {p_data_ = 0x0, data_ = {category_group_enabled = 0x0, name = 0x0}}
#3  0x00007ff2a25334a0 in base::MessageLoop::DeferOrRunPendingTask (this=this@entry=0x7ff295de29f0, pending_task=...) at base/message_loop/message_loop.cc:496
No locals.
#4  0x00007ff2a25350d1 in base::MessageLoop::DoDelayedWork (this=0x7ff295de29f0, next_delayed_work_time=0x7ff2a16e1858) at base/message_loop/message_loop.cc:726
        pending_task = {<base::TrackingInfo> = {birth_tally = 0x7ff2a170d720, time_posted = {ticks_ = 4349709557}, delayed_run_time = {ticks_ = 4359709557}}, task = {<base::internal::CallbackBase> = {bind_state_ = {ptr_ = 0x3b6c7fb65570}, polymorphic_invoke_ = 0x7ff2a2505c20 <base::internal::Invoker<1, base::internal::BindState<base::internal::RunnableAdapter<void (content::GpuWatchdogThread::*)()>, void (content::GpuWatchdogThread*), void (base::WeakPtr<content::GpuWatchdogThread>)>, void (content::GpuWatchdogThread*)>::Run(base::internal::BindStateBase*)>}, <No data fields>}, posted_from = {function_name_ = 0x7ff2a546d4de <content::GpuWatchdogThread::OnCheck(bool)::__FUNCTION__> "OnCheck", file_name_ = 0x7ff2a546d488 "content/gpu/gpu_watchdog_thread.cc", line_number_ = 163, program_counter_ = 0x7ff2a2505f8c <content::GpuWatchdogThread::OnCheck(bool)+348>}, sequence_num = 8410, nestable = true}
        next_delayed_work_time = 0x7ff2a16e1858
        this = 0x7ff295de29f0
#5  0x00007ff2a2536bae in base::MessagePumpDefault::Run (this=0x7ff2a16e1840, delegate=0x7ff295de29f0) at base/message_loop/message_pump_default.cc:33
        did_work = false
        allow_wait = <optimized out>
#6  0x00007ff2a25458ed in base::RunLoop::Run (this=0x7ff295de29b0) at base/run_loop.cc:45
No locals.
#7  0x00007ff2a2531735 in base::MessageLoop::Run (this=<optimized out>) at base/message_loop/message_loop.cc:321
        run_loop = {loop_ = 0x7ff295de29f0, weak_factory_ = {weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}, ptr_ = 0x7ff295de29b0}, previous_run_loop_ = 0x0, dispatcher_ = 0x0, run_depth_ = 1, run_called_ = true, quit_called_ = false, running_ = true, quit_when_idle_received_ = false}
#8  0x00007ff2a2556fdd in base::Thread::ThreadMain (this=0x7ff2a1665cf0) at base/threading/thread.cc:203
        message_loop = {<base::MessagePump::Delegate> = {_vptr.Delegate = 0x7ff2a7278e50 <vtable for base::MessageLoop+16>}, static kHighResolutionTimerModeLeaseTimeMs = 1000, pump_ = {ptr_ = 0x7ff2a16e1840}, type_ = base::MessageLoop::TYPE_DEFAULT, work_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x3b6c86602b40, _M_map_size = 18, _M_start = {_M_cur = 0x3b6c812c4600, _M_first = 0x3b6c812c4600, _M_last = 0x3b6c812c47e0, _M_node = 0x3b6c86602ba0}, _M_finish = {_M_cur = 0x3b6c812c4600, _M_first = 0x3b6c812c4600, _M_last = 0x3b6c812c47e0, _M_node = 0x3b6c86602ba0}}}, <No data fields>}}, <No data fields>}, delayed_work_queue_ = {c = {<std::_Vector_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_start = 0x7ff2a1727900, _M_finish = 0x7ff2a1727900, _M_end_of_storage = 0x7ff2a1727b80}}, <No data fields>}, comp = {<std::binary_function<base::PendingTask, base::PendingTask, bool>> = {<No data fields>}, <No data fields>}}, recent_time_ = {ticks_ = 4359709629}, deferred_non_nestable_work_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x7ff2a16557c0, _M_map_size = 8, _M_start = {_M_cur = 0x7ff2a170fc00, _M_first = 0x7ff2a170fc00, _M_last = 0x7ff2a170fde0, _M_node = 0x7ff2a16557d8}, _M_finish = {_M_cur = 0x7ff2a170fc00, _M_first = 0x7ff2a170fc00, _M_last = 0x7ff2a170fde0, _M_node = 0x7ff2a16557d8}}}, <No data fields>}}, <No data fields>}, destruction_observers_ = {<ObserverListBase<base::MessageLoop::DestructionObserver>> = {<base::SupportsWeakPtr<ObserverListBase<base::MessageLoop::DestructionObserver> >> = {<base::internal::SupportsWeakPtrBase> = {<No data fields>}, weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}}, observers_ = {<std::_Vector_base<base::MessageLoop::DestructionObserver*, std::allocator<base::MessageLoop::DestructionObserver*> >> = {_M_impl = {<std::allocator<base::MessageLoop::DestructionObserver*>> = {<__gnu_cxx::new_allocator<base::MessageLoop::DestructionObserver*>> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}, notify_depth_ = 0, type_ = ObserverListBase<base::MessageLoop::DestructionObserver>::NOTIFY_ALL}, <No data fields>}, nestable_tasks_allowed_ = false, exception_restoration_ = false, thread_name_ = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7ff2a1654318 "Watchdog"}}, message_histogram_ = 0x0, incoming_queue_ = {<std::queue<base::PendingTask, std::deque<base::PendingTask, std::allocator<base::PendingTask> > >> = {c = {<std::_Deque_base<base::PendingTask, std::allocator<base::PendingTask> >> = {_M_impl = {<std::allocator<base::PendingTask>> = {<__gnu_cxx::new_allocator<base::PendingTask>> = {<No data fields>}, <No data fields>}, _M_map = 0x7ff2a1655680, _M_map_size = 8, _M_start = {_M_cur = 0x3b6c812b3590, _M_first = 0x3b6c812b3400, _M_last = 0x3b6c812b35e0, _M_node = 0x7ff2a16556a0}, _M_finish = {_M_cur = 0x3b6c812b3590, _M_first = 0x3b6c812b3400, _M_last = 0x3b6c812b35e0, _M_node = 0x7ff2a16556a0}}}, <No data fields>}}, <No data fields>}, incoming_queue_lock_ = {lock_ = {os_lock_ = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}}}, run_loop_ = 0x7ff295de29b0, next_sequence_num_ = 8411, task_observers_ = {<ObserverListBase<base::MessageLoop::TaskObserver>> = {<base::SupportsWeakPtr<ObserverListBase<base::MessageLoop::TaskObserver> >> = {<base::internal::SupportsWeakPtrBase> = {<No data fields>}, weak_reference_owner_ = {flag_ = {ptr_ = 0x0}}}, observers_ = {<std::_Vector_base<base::MessageLoop::TaskObserver*, std::allocator<base::MessageLoop::TaskObserver*> >> = {_M_impl = {<std::allocator<base::MessageLoop::TaskObserver*>> = {<__gnu_cxx::new_allocator<base::MessageLoop::TaskObserver*>> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}, notify_depth_ = 0, type_ = ObserverListBase<base::MessageLoop::TaskObserver>::NOTIFY_ALL}, <No data fields>}, message_loop_proxy_ = {ptr_ = 0x7ff2a16556c0}, thread_task_runner_handle_ = {impl_ = {data_ = {<base::DefaultDeleter<base::ThreadTaskRunnerHandle>> = {<No data fields>}, ptr = 0x7ff2a17533f0}}}}
#9  0x00007ff2a255369c in base::(anonymous namespace)::ThreadFunc (params=<optimized out>) at base/threading/platform_thread_posix.cc:80
        thread_params = <optimized out>
        delegate = 0x7ff2a1665cf0
#10 0x00007ff29a9f2f6e in start_thread (arg=0x7ff295de3700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7ff295de3700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140679873181440, 8372213842349675360, 0, 140680066903776, 140734524959296, 21, -8370714385085344928, -8370747911500049568}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#11 0x00007ff299421e2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.