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[libFuzzer] debug prints in tracing

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llvm-svn: 257249
This commit is contained in:
Kostya Serebryany 2016-01-09 03:46:08 +00:00
parent bdc66ac566
commit b57e7c0541
1 changed files with 27 additions and 2 deletions
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29
lib/Fuzzer/FuzzerTraceState.cpp
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@ -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(size_t CmpSize, const uint8_t *Data1,
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,