Hello all,
I was hoping to enable the context switch stats dumps on an aarch64 simulation
but I'm hitting an assertion failure and was wondering if anyone had any ideas
before I try to dig into this. The failure is here:
#2 0x00000000015d89fa in ArmISA::vtophys (tc=0x81378e0, addr=25769804584) at
build/ARM/arch/arm/vtophys.cc:104
104 panic("Table walkers support functional accesses. We should
never get here\n");
(gdb) l
99 const std::pair<bool, Addr> translation(try_translate(tc, addr));
100
101 if (translation.first)
102 return translation.second;
103 else
104 panic("Table walkers support functional accesses. We should
never get here\n");
105 }
What I'm doing is checkpointing the aarch64 Ubuntu headless image at the shell
right before my program runs and restoring with
--enable-context-switch-stats-dump. I've done the same procedure in an aarch32
simulation and it works great. In case it is helpful, here is the relevant
portion of the backtrace:
#2 0x00000000015d89fa in ArmISA::vtophys (tc=0x81378e0, addr=25769804584) at
build/ARM/arch/arm/vtophys.cc:104
#3 0x00000000010b76f7 in FSTranslatingPortProxy::readBlob (this=0x830be40,
addr=25769804584, p=0x7fffffff9cd8 "", size=4) at
build/ARM/mem/fs_translating_port_proxy.cc:83
#4 0x00000000010b7963 in CopyOut (tc=0x81378e0, dest=0x7fffffff9cd8,
src=25769804584, cplen=4) at build/ARM/mem/fs_translating_port_proxy.cc:129
#5 0x0000000001564e67 in Linux::ThreadInfo::curTaskPID (this=0x7fffffff9d20,
thread_info=18446743799249746636) at
build/ARM/arch/generic/linux/threadinfo.hh:119
#6 0x00000000015642c6 in DumpStatsPCEvent::process (this=0x5f6f320,
tc=0x81378e0) at build/ARM/arch/arm/linux/system.cc:291
#7 0x0000000001384e4e in PCEventQueue::doService (this=0x5cc0920,
tc=0x81378e0) at build/ARM/cpu/pc_event.cc:107
#8 0x00000000013a8046 in PCEventQueue::service (this=0x5cc0920, tc=0x81378e0)
at build/ARM/cpu/pc_event.hh:108
#9 0x00000000013ae4cb in DefaultCommit<O3CPUImpl>::commitInsts
(this=0x813c6d8) at build/ARM/cpu/o3/commit_impl.hh:1099
#10 0x00000000013ac4ce in DefaultCommit<O3CPUImpl>::commit (this=0x813c6d8) at
build/ARM/cpu/o3/commit_impl.hh:928
#11 0x00000000013ab535 in DefaultCommit<O3CPUImpl>::tick (this=0x813c6d8) at
build/ARM/cpu/o3/commit_impl.hh:690
#12 0x00000000013bbf9a in FullO3CPU<O3CPUImpl>::tick (this=0x813a000) at
build/ARM/cpu/o3/cpu.cc:560
#13 0x00000000013bfd7c in FullO3CPU<O3CPUImpl>::TickEvent::process
(this=0x813a218) at build/ARM/cpu/o3/cpu.cc:148
I'm going to dig into this, but any hints are highly appreciated.
Thanks,
Paul
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