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Plugin: taint_compute_numbers

Summary

The taint_compute_numbers plugin tracks the amount of computation done on tainted data. Roughly speaking, if we have an operation like

c = a + b

Then the taint compute number is computed as:

TCN(c) = max(TCN(a),TCN(b)) + 1

Simple copies of data do not increase the taint compute number.

taint_compute_numbers tracks taint operations using the taint plugin and prints to stdout the maximum observed taint compute number whenever the taint state changes or tainted computation is observed.

Warning: taint_compute_numbers currently uses the deprecated taint plugin rather than the newer taint2 plugin.

Arguments

None.

Dependencies

Depends on the taint plugin to track taint.

APIs and Callbacks

None.

Example

Using taint_compute_numbers is simple:

$PANDA_PATH/x86_64-softmmu/qemu-system-x86_64 -replay foo \
    -panda taint -panda taint_compute_numbers