[M3devel] GC deadlock

[Dragiša Durić]

This is 5.8.6 codebase, so it’s maybe solved in later codebase… I have few threads, one has this on top of stack

#0  0x00130416 in __kernel_vsyscall ()
#1  0x00ca6019 in __lll_lock_wait () from /lib/libpthread.so.0
#2  0x00ca1430 in _L_lock_677 () from /lib/libpthread.so.0
#3  0x00ca1301 in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0x00428aa1 in ThreadPThread__pthread_mutex_lock (m=0xc6e430) at ../src/thread/PTHREAD/ThreadPThreadC.c:557
#5  0x00427d67 in RTOS__LockHeap () at ../src/thread/PTHREAD/ThreadPThread.m3:1434

another:
#0  0x00130416 in __kernel_vsyscall ()
#1  0x00ca6c66 in nanosleep () from /lib/libpthread.so.0
#2  0x00428941 in ThreadPThread__Nanosleep (req=0xb6c30d88, rem=0xb6c30d90) at ../src/thread/PTHREAD/ThreadPThreadC.c:500
#3  0x00424f02 in ThreadPThread__CommonSleep () at ../src/thread/c:551
#4  0x00426cc9 in ThreadPThread__StopWorld () at ../src/thread/PTHREAD/ThreadPThread.m3:1086
#5  0x004260c3 in RTThread__SuspendOthers () at ../src/thread/PTHREAD/ThreadPThread.m3:812
#6  0x00408cd6 in RTCollector__CollectSomeInStateZero () at ../src/runtime/common/RTCollector.m3:746
#7  0x00408c95 in RTCollector__CollectSome () at ../src/runtime/common/RTCollector.m3:720
#8  0x00408748 in RTHeapRep__CollectEnough () at ../src/runtime/common/RTCollector.m3:654

and others:
#0  0x00130416 in __kernel_vsyscall ()
#1  0x00cdeede in sigsuspend () from /lib/libc.so.6
#2  0x0042836e in ThreadPThread__sigsuspend () at ../src/thread/PTHREAD/ThreadPThreadC.c:141
#3  0x004271f6 in ThreadPThread__SignalHandler (M3_DLS2Hj_sig=<error reading variable>, M3_AJWxb1_info=<error reading variable>, M3_AJWxb1_context=<error reading variable>)
    at ../src/thread/PTHREAD/ThreadPThread.m3:1205
#4  <signal handler called>
#5  0x00130416 in __kernel_vsyscall ()
#6  0x00ca3664 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0

Am I reading this correctly? Thread waiting for lock “refuses” to be suspended?

--
Dragiša Durić
dragisha at m3w.org



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