[libfuzzer] dump_coverage command line flag

Reviewers: kcc, vitalybuka

Differential Revision: https://reviews.llvm.org/D27942

llvm-svn: 290138

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Fuzzer/FuzzerTracePC.cpp b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
index 3c6130e0090..81c084b5899 100644
--- a/llvm/lib/Fuzzer/FuzzerTracePC.cpp
+++ b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
@@ -20,6 +20,7 @@
 #include "FuzzerTracePC.h"
 #include "FuzzerValueBitMap.h"
 #include <map>
+#include <sanitizer/coverage_interface.h>
 #include <set>
 #include <sstream>
 
@@ -188,6 +189,10 @@ void TracePC::PrintCoverage() {
   }
 }
 
+void TracePC::DumpCoverage() {
+  __sanitizer_dump_coverage(PCs, GetNumPCs());
+}
+
 // Value profile.
 // We keep track of various values that affect control flow.
 // These values are inserted into a bit-set-based hash map.