[libfuzzer] Clarify -max_len behavior on bigger files (#123095)
diff --git a/compiler-rt/lib/fuzzer/FuzzerFlags.def b/compiler-rt/lib/fuzzer/FuzzerFlags.def
index fc3b3aa..b88458a 100644
--- a/compiler-rt/lib/fuzzer/FuzzerFlags.def
+++ b/compiler-rt/lib/fuzzer/FuzzerFlags.def
@@ -14,8 +14,9 @@
FUZZER_FLAG_INT(runs, -1,
"Number of individual test runs (-1 for infinite runs).")
FUZZER_FLAG_INT(max_len, 0, "Maximum length of the test input. "
- "If 0, libFuzzer tries to guess a good value based on the corpus "
- "and reports it. ")
+ "Contents of corpus files are going to be truncated to this value. "
+ "If 0, libFuzzer tries to guess a good value based on the corpus "
+ "and reports it.")
FUZZER_FLAG_INT(len_control, 100, "Try generating small inputs first, "
"then try larger inputs over time. Specifies the rate at which the length "
"limit is increased (smaller == faster). If 0, immediately try inputs with "
