How to Run a Fuzz Test

Create an appropriate build config:

% tools/mb/mb.py gen -m chromium.fuzz -b 'Libfuzzer Upload Linux ASan' out/libfuzzer
% gn gen out/libfuzzer

Build the fuzz target:

% ninja -C out/libfuzzer $TEST_NAME

Create an empty corpus directory:

% mkdir ${TEST_NAME}_corpus

Run the fuzz target, turning off detection of ODR violations that occur in component builds:

% export ASAN_OPTIONS=detect_odr_violation=0
% ./out/libfuzzer/$TEST_NAME ${TEST_NAME}_corpus

For more details, refer to https://chromium.googlesource.com/chromium/src/testing/libfuzzer/+/refs/heads/master/getting_started.md