Hi everyone,
I tried to use lackey to record every memory access made by program. I
wrote very simple Hello Word program and used lackey to trace.
Unfortunately, lackey couldn't finish this job and I got very huge log file
(>100M) so I had to stop it.
After checked log file, lackey recorded a lot of following repeat
information:
I 04853198,2
I 0485319a,2
I 0485319c,4
S 0490c0bc,4
I 048531a0,4
I 048531a4,2
I 04853194,4
L 0490c0bc,4
I 04853198,2
I 0485319a,2
I 0485319c,4
S 0490c0bc,4
I 048531a0,4
I 048531a4,2
I 04853194,4
L 0490c0bc,4
My environment:
uname -r : 3.9.0-1-linaro-omap
Pandaboard ES, I also checked on OMAP 5432 Evm Board.
Steps to Reproduce:
Setp 1. Write test.c
#include <stdio.h>
int main()
{
printf("Hello\n");
return 0;
}
Step 2. Compile program.
arm-linux-gnueabihf-gcc ./test.c
Step 3. valgrind --log-file="log.txt" --tool=lackey --trace-mem=yes ./a.out
After checked the code (lk_main.c), I found that the problem may be dirty
helper. I only call addStmtToIRSB when "ev->addr->tag" is "Iex_RdTmp",
Endless loop never happens.
I modified the "addStmtToIRSB( sb, IRStmt_Dirty(di) );" (in flushEvents
function) code into following codes:
switch (ev->addr->tag) {
case Iex_Const:
VG_(printf)("L %08lx\n", ev->addr->Iex.Const.con->Ico.U32);
break;
case Iex_RdTmp:
addStmtToIRSB( sb, IRStmt_Dirty(di) );
VG_(printf)("Iex_RdTmp %lu\n", ev->addr->Iex.RdTmp.tmp);
break;
}
Does anyone can help me? Thanks!
Best Regards.
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