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fuzz: count symlinked fuzz corpus files #4626

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Merged
TheBlueMatt merged 1 commit into from
May 20, 2026
+21 −3
Merged

fuzz: count symlinked fuzz corpus files #4626

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24 changes: 21 additions & 3 deletions fuzz/ci-fuzz.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,23 @@ check_crash() {
fi
}

corpus_count() {
local CORPUS_DIR=$1
# CI links cloned corpus directories into hfuzz_workspace.
find -L "$CORPUS_DIR" -type f 2>/dev/null | wc -l
}

check_linked_corpus() {
local CORPUS_DIR=$1
local FILE=$2
local CORPUS_COUNT=$3

if [ -L "$CORPUS_DIR" ] && [ "$CORPUS_COUNT" -eq 0 ]; then
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@TheBlueMatt TheBlueMatt May 20, 2026

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Feel like this should warn even if the dir isn't a link, but whatever.

echo "Linked corpus for $FILE has no visible input files: $CORPUS_DIR"
exit 1
fi
}

run_targets() {
local CRATE_DIR=$1
local TARGET_RUSTFLAGS=$2
Expand All @@ -55,7 +72,8 @@ run_targets() {
FILENAME=$(basename "$TARGET")
FILE="${FILENAME%.*}"
CORPUS_DIR="$HFUZZ_WORKSPACE/$FILE/input"
CORPUS_COUNT=$(find "$CORPUS_DIR" -type f 2>/dev/null | wc -l)
CORPUS_COUNT=$(corpus_count "$CORPUS_DIR")
check_linked_corpus "$CORPUS_DIR" "$FILE" "$CORPUS_COUNT"
# Run 8x the corpus size plus a baseline, ensuring full corpus replay
# with room for new mutations. The 10-minute hard cap (--run_time 600)
# prevents slow-per-iteration targets from running too long.
Expand All @@ -69,7 +87,7 @@ run_targets() {
cargo --color always hfuzz run "$FILE"
FUZZ_END=$(date +%s)
FUZZ_TIME=$((FUZZ_END - FUZZ_START))
FUZZ_CORPUS_COUNT=$(find "$CORPUS_DIR" -type f 2>/dev/null | wc -l)
FUZZ_CORPUS_COUNT=$(corpus_count "$CORPUS_DIR")
check_crash "$HFUZZ_WORKSPACE" "$FILE"
if [ "$GITHUB_REF" = "refs/heads/main" ] || [ "$FUZZ_MINIMIZE" = "true" ]; then
HFUZZ_RUN_ARGS="-M -q -n8 -t 3"
Expand All @@ -78,7 +96,7 @@ run_targets() {
cargo --color always hfuzz run "$FILE"
MIN_END=$(date +%s)
MIN_TIME=$((MIN_END - MIN_START))
MIN_CORPUS_COUNT=$(find "$CORPUS_DIR" -type f 2>/dev/null | wc -l)
MIN_CORPUS_COUNT=$(corpus_count "$CORPUS_DIR")
check_crash "$HFUZZ_WORKSPACE" "$FILE"
SUMMARY="${SUMMARY}${FILE}|${ITERATIONS}|${CORPUS_COUNT}|${FUZZ_CORPUS_COUNT}|${FUZZ_TIME}|${MIN_CORPUS_COUNT}|${MIN_TIME}\n"
else
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