run error when blocking port covert channels about spt HOT 7 CLOSED

Apologies for responding so late! For some reason Github didn't inform me that an issue had been posted...

In any case, what program are you testing SPT hardware on?

Also, have you tried running with the --track-insts option? It might tell what is causing the simulator to hang.

from spt.

Thank you for replying.

Our command is "build/X86_MESI_Two_Level/gem5.fast --outdir=m5out configs/example/se.py -c test --num-cpus=1 --mem-size=4GB --num-l2caches=1 --l1d_assoc=8 --l2_assoc=16 --l1i_assoc=4 --cpu-type=DerivO3CPU --needsTSO=1 --scheme=SpectreSafeFence --num-dirs=1 --ruby --applyDDIFT=1 --configImpFlow=Ignore --moreTransmitInsts=1 --ifPrintROB=0 --network=simple --topology=Mesh_XY --mesh-rows=1 --printDelayCycles=0 --enableShadowL1=1 --bottomlessShadowL1=0 --untaintTier=0 --freeParam=3 --disableUntaint=0 --fwdUntaint=1 --bwdUntaint=1 --idealUntaint=0"

And here is the test code:

#include<stdio.h>

void aaa()
{
	int t[512*128]={0};
	int flag = 0;
	for(int i = 0;i < 100;i ++){
		if(i < 10){
			flag &= i;
			t[i*512] ++;
			t[i*512] = t[i*512]+flag;
			flag += i;
		}
	}
	return ;
}

int main()
{
	int a = 0,i = 1;
	a ++;
	if(i > 10){
		a &= i;
		
	}
	int temp = a ++;
	for(int j = 1;j < 10;j ++){
		temp &= a;
		a ++;
	}
	aaa();
	return 0;
}

We set the moreTransmitInsts as 1 to consider div insts. After analyzing the reason of blocking, it seems like several tainted div insts are never untained, then they can not be issued.

from spt.

Thanks! I'll try running that program and see what the issue is.

from spt.

Ok. Thanks : )

from spt.

What flags are you compiling the program with?

from spt.

I have tried to compile it with "-O0" and "-O0 -static". And, my gcc version is "gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.12) ".

from spt.

@pluviophilee Apologies for the late update. PR #2 should fix the issue. Please let me know if this works or if you run into any more trouble!

from spt.