Are you using the latest version of gem5? That assert was replaced with a fault a while ago.
On Thu, Sep 13, 2018 at 12:33 AM Gabe Black <gabebl...@google.com> wrote: > This is a bug in the RISCV ISA. Either that instruction should have > decoded to something else if that group of bits was 0 (a different > instruction, a dummy instruction which generates an undefined opcode > exception, etc.), or the instruction itself should generate a fault. No > matter what pattern of bits you pass to the decoder, you should get an > instruction you can execute out of it that will not assert, panic, etc. > This is important at least in part because the O3 CPU might speculatively > execute memory which isn't an instruction, and there's really no way to > know what that memory will hold. If the instruction returns a Fault when it > finds a problem the CPU can throw away the fault if it determines it > shouldn't have executed the instruction. > > Gabe > > On Wed, Sep 12, 2018 at 2:01 PM Zaman, Monir <monir.za...@utdallas.edu> > wrote: > >> Hello, >> >> I am simulating 471.omnetpp with RISCV architecture for a given >> simulation point. The simulation stops throwing an assertion error: >> >> >> >> *Command:* >> >> gem/build/RISCV/gem5.opt -d >> /gem5/RESULT/1M_maxK_6/471.omnetpp_out/simpoint1 gem/configs/example/se.py >> -I 1000000 -W 100000000 --fast-forward=323000000 --standard-switch=1 >> --mem-size=2048MB --caches --cacheline_size=64 --l1d_size=8kB >> --l1i_size=2kB --l1d_assoc=1 --l1i_assoc=1 -c >> /Speckle/build/471.omnetpp_test/omnetpp_base.riscv -o '-f >> /Speckle/build/471.omnetpp_test/omnetpp.ini' >> >> >> >> >> >> *Error :* >> >> **** REAL SIMULATION **** >> >> gem5.opt: build/RISCV/arch/riscv/generated/exec-ns.cc.inc:1341: virtual >> Fault RiscvISAInst::C_slli::execute(ExecContext*, Trace::InstRecord*) >> const: Assertion `bits(machInst, 11, 7) != 0' failed. >> >> Program aborted at tick >> 1237033347500 >> >> >> --- BEGIN LIBC BACKTRACE >> --- >> >> >> gem/build/RISCV/gem5.opt(_Z15print_backtracev+0x15)[0x978125] >> >> >> gem/build/RISCV/gem5.opt(_Z12abortHandleri+0x36)[0x982046] >> >> >> /lib64/libpthread.so.0(+0xf6d0)[0x7ff28cc916d0] >> >> >> /lib64/libc.so.6(gsignal+0x37)[0x7ff28ada4277] >> >> >> /lib64/libc.so.6(abort+0x148)[0x7ff28ada5968] >> >> >> /lib64/libc.so.6(+0x2f096)[0x7ff28ad9d096] >> >> >> /lib64/libc.so.6(+0x2f142)[0x7ff28ad9d142] >> >> >> gem/build/RISCV/gem5.opt(_ZNK12RiscvISAInst6C_slli7executeEP11ExecContextPN5Trace10InstRecordE+0x93)[0xa35ae3] >> >> >> gem/build/RISCV/gem5.opt(_ZN13BaseO3DynInstI9O3CPUImplE7executeEv+0x35)[0x8c57f5] >> >> >> gem/build/RISCV/gem5.opt(_ZN10DefaultIEWI9O3CPUImplE12executeInstsEv+0xac5)[0x8daeb5] >> >> >> gem/build/RISCV/gem5.opt(_ZN10DefaultIEWI9O3CPUImplE4tickEv+0x109)[0x8dd1f9] >> >> >> gem/build/RISCV/gem5.opt(_ZN9FullO3CPUI9O3CPUImplE4tickEv+0x87)[0x8b64d7] >> >> >> gem/build/RISCV/gem5.opt(_ZN10EventQueue10serviceOneEv+0xa1)[0x97d811] >> >> >> gem/build/RISCV/gem5.opt(_Z9doSimLoopP10EventQueue+0x38)[0x98b5d8] >> >> >> gem/build/RISCV/gem5.opt(_Z8simulatem+0xaae)[0x98c40e] >> >> >> gem/build/RISCV/gem5.opt[0x8819c0] >> >> >> gem/build/RISCV/gem5.opt[0x864226] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x730a)[0x7ff28c59420a] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7ff28c59603d] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7ff28c59353c] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7ff28c5936bd] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7ff28c5936bd] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7ff28c59603d] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7ff28c596142] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x5513)[0x7ff28c592413] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7ff28c59603d] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7ff28c59353c] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7ff28c59603d] >> >> >> /lib64/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7ff28c596142] >> >> >> /lib64/libpython2.7.so.1.0(+0x10057f)[0x7ff28c5af57f] >> >> >> /lib64/libpython2.7.so.1.0(PyRun_StringFlags+0x65)[0x7ff28c5b03e5] >> >> >> gem/build/RISCV/gem5.opt(_Z6m5MainiPPc+0x7f)[0x980e0f] >> >> >> --- END LIBC BACKTRACE --- >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
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