[llvm] r257249 - [libFuzzer] debug prints in tracing
Kostya Serebryany via llvm-commits
llvm-commits at lists.llvm.org
Fri Jan 8 19:46:08 PST 2016
Author: kcc
Date: Fri Jan 8 21:46:08 2016
New Revision: 257249
URL: http://llvm.org/viewvc/llvm-project?rev=257249&view=rev
Log:
[libFuzzer] debug prints in tracing
Modified:
llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp
Modified: llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp?rev=257249&r1=257248&r2=257249&view=diff
==============================================================================
--- llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp (original)
+++ llvm/trunk/lib/Fuzzer/FuzzerTraceState.cpp Fri Jan 8 21:46:08 2016
@@ -170,6 +170,25 @@ struct TraceBasedMutation {
uint8_t Data[kMaxSize];
};
+static void PrintDataByte(uint8_t Byte) {
+ if (Byte == '\\')
+ Printf("\\\\");
+ else if (Byte == '"')
+ Printf("\\\"");
+ else if (Byte >= 32 && Byte < 127)
+ Printf("%c", Byte);
+ else
+ Printf("\\x02x", Byte);
+}
+
+static void PrintData(const uint8_t *Data, size_t Size) {
+ Printf("\"");
+ for (size_t i = 0; i < Size; i++) {
+ PrintDataByte(Data[i]);
+ }
+ Printf("\"");
+}
+
const size_t TraceBasedMutation::kMaxSize;
class TraceState {
@@ -394,8 +413,14 @@ void TraceState::TraceMemcmpCallback(siz
const uint8_t *Data2) {
if (!RecordingTraces || !IsMyThread) return;
CmpSize = std::min(CmpSize, TraceBasedMutation::kMaxSize);
- TryToAddDesiredData(Data1, Data2, CmpSize);
- TryToAddDesiredData(Data2, Data1, CmpSize);
+ int Added2 = TryToAddDesiredData(Data1, Data2, CmpSize);
+ int Added1 = TryToAddDesiredData(Data2, Data1, CmpSize);
+ if ((Added1 || Added2) && Options.Verbosity >= 3) {
+ Printf("MemCmp Added %d%d: ", Added1, Added2);
+ if (Added1) PrintData(Data1, CmpSize);
+ if (Added2) PrintData(Data2, CmpSize);
+ Printf("\n");
+ }
}
void TraceState::TraceSwitchCallback(uintptr_t PC, size_t ValSizeInBits,
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