[compiler-rt] libFuzzer: update -merge_control_file= help message.
Summary:
The motivation for this change is to have a distinguisher in libFuzzer
that would let the runner know whether multistep merge is supported or not by
a particular fuzz target binary. Otherwise, multistep merge fails to execute
with older version of libFuzzer, and there is no way to verify that easily.
Reviewers: kcc
Subscribers: dberris, #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D71423
GitOrigin-RevId: 926fa4088cc2d6fdcd9301e80d05d9310009b660
diff --git a/FuzzerFlags.def b/FuzzerFlags.def
index 0e19a9c..a674157 100644
--- a/FuzzerFlags.def
+++ b/FuzzerFlags.def
@@ -56,7 +56,8 @@
"Specify a control file used for the merge process. "
"If a merge process gets killed it tries to leave this file "
"in a state suitable for resuming the merge. "
- "By default a temporary file will be used.")
+ "By default a temporary file will be used."
+ "The same file can be used for multistep merge process.")
FUZZER_FLAG_INT(minimize_crash, 0, "If 1, minimizes the provided"
" crash input. Use with -runs=N or -max_total_time=N to limit "
"the number attempts."
