Hi,
I am running m5 in ALPHA SE mode for inorder CPU model. I am getting a
segmentation fault in the data translation section in tlb.cc file, when I am
running for the SPEC2k6 mcf benchmark. I have not made any modifications to
this part of the code. So, could anybody help me figure out the cause of the
issue?
Following is the gdb trace of the fault:- It shows that the fault is
occuring when a translation is attempted in translatedata function in
arch/tlb.cc file. The flag value returning from the isSet function is set at
"4" => the Vaddr is valid (as per the mem/request.hh file). What might be
causing this issue?
Program received signal SIGSEGV, Segmentation fault.
0x0000000000431f87 in Flags<unsigned char>::isSet (this=0x18, *flags=4
'\004')*
at build/ALPHA_SE/base/flags.hh:63
63 bool isSet(Type flags) const { return (_flags & flags); }
(gdb) bt
#0 0x0000000000431f87 in Flags<unsigned char>::isSet (this=0x18,
flags=4 '\004') at build/ALPHA_SE/base/flags.hh:63
#1 0x00000000004626d5 in Request::getVaddr (this=0x0)
at build/ALPHA_SE/mem/request.hh:368
#2 0x000000000090c067 in AlphaISA::TLB::translateData (this=0x1710400,
req=0x0, tc=0x1923a90, write=false) at
build/ALPHA_SE/arch/alpha/tlb.cc:452
#3 0x000000000090d1b5 in AlphaISA::TLB::translateAtomic (this=0x1710400,
req=0x0, tc=0x1923a90, mode=BaseTLB::Read)
at build/ALPHA_SE/arch/alpha/tlb.cc:587
#4 0x000000000073a88c in CacheUnit::doTLBAccess (this=0x17268c0, inst=...,
cache_req=0x1bfe390, acc_size=8, flags=0, tlb_mode=BaseTLB::Read)
at build/ALPHA_SE/cpu/inorder/resources/cache_unit.cc:431
#5 0x000000000073d07b in CacheUnit::read (this=0x17268c0, inst=...,
addr=4831386496, data=0x7fffffff9a80 "", size=8, flags=0)
at build/ALPHA_SE/cpu/inorder/resources/cache_unit.cc:548
#6 0x00000000007d38f7 in InOrderCPU::read (this=0x172a160, inst=...,
addr=4831386496, data=0x7fffffff9a80 "", size=8, flags=0)
at build/ALPHA_SE/cpu/inorder/cpu.cc:1787
#7 0x00000000006d1b11 in InOrderDynInst::readBytes (this=0x26c3250,
addr=4831386496, data=0x7fffffff9a80 "", size=8, flags=0)
at build/ALPHA_SE/cpu/inorder/inorder_dyn_inst.cc:517
#8 0x00000000006d3795 in RefCountingPtr<FaultBase>
InOrderDynInst::read<unsigned long>(unsigned long, unsigned long&, unsigned
int) ()
Thanks,
Reena
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