How to track a variable

[misalungi]

I have a project consists of several cpp files. I want to use taintgrind to track a variable. I do not know how to mention which variable to be taint. Should I make a txt file or a dat file to mention the variable and put the address of txt file in this command: $ valgrind --tool=taintgrind --file-filter=/path/to/test.txt --taint-start=0 --taint-len=1 gzip path/to/test.txt

[wmkhoo]

That command is to taint the contents of a file. If you want to taint a variable in your program, use the client request TNT_TAINT().

[wmkhoo]

Hi,

VALGRIND_DO_CLIENT_REQUEST_STMT is defined in valgrind.h, which is part of valgrind. Did you download and build valgrind?

Regards

On Wed, 12 Dec 2018 at 21:19, misalungi notifications@github.com wrote:

I am using TNT_TAINT(&a, sizeof(a)); in my main file. There is an error in line of: TNT_TAINT(&a, sizeof(a)); This is the error. Function 'VALGRIND_DO_CLIENT_REQUEST_STMT' could not be resolved

I also added valgrind includes in include path. But I think this function:

define TNT_TAINT(addr, size)

VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__TAINTGRIND_TAINT,addr,size,0,0,); can not open VALGRIND_DO_CLIENT_REQUEST_STMT.

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[misalungi]

It works now. Thank you!

[misalungi]

Now I created a dot file with this command: valgrind --tool=taintgrind tests/sign32 2>&1 | python log2dot.py > sign32.dot I want to convert it to png or svg or pdf it gives this error: syntax error in line 47 near '&': subgraph cluster_std__ostream&{ label="std::ostream&"

[wmkhoo]

This is an ugly hack, but see if it works. I should probably use regex at some point.

[wmkhoo]

Closing this issue