[libFuzzer] experimental support for Clang's coverage (fprofile-instr-generate), Linux-only
llvm-svn: 310771
diff --git a/llvm/lib/Fuzzer/FuzzerTracePC.cpp b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
index d038374..a54a8c1 100644
--- a/llvm/lib/Fuzzer/FuzzerTracePC.cpp
+++ b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
@@ -126,6 +126,8 @@
_Exit(1);
}
}
+ if (size_t NumClangCounters = ClangCountersEnd() - ClangCountersBegin())
+ Printf("INFO: %zd Clang Coverage Counters\n", NumClangCounters);
}
ATTRIBUTE_NO_SANITIZE_ALL
@@ -137,13 +139,12 @@
}
void TracePC::UpdateObservedPCs() {
+ auto Observe = [&](uintptr_t PC) {
+ bool Inserted = ObservedPCs.insert(PC).second;
+ if (Inserted && DoPrintNewPCs)
+ PrintPC("\tNEW_PC: %p %F %L\n", "\tNEW_PC: %p\n", PC + 1);
+ };
if (NumPCsInPCTables) {
- auto Observe = [&](uintptr_t PC) {
- bool Inserted = ObservedPCs.insert(PC).second;
- if (Inserted && DoPrintNewPCs)
- PrintPC("\tNEW_PC: %p %F %L\n", "\tNEW_PC: %p\n", PC + 1);
- };
-
if (NumInline8bitCounters == NumPCsInPCTables) {
for (size_t i = 0; i < NumModulesWithInline8bitCounters; i++) {
uint8_t *Beg = ModuleCounters[i].Start;
@@ -167,6 +168,13 @@
}
}
}
+ if (size_t NumClangCounters =
+ ClangCountersEnd() - ClangCountersBegin()) {
+ auto P = ClangCountersBegin();
+ for (size_t Idx = 0; Idx < NumClangCounters; Idx++)
+ if (P[Idx])
+ Observe((uintptr_t)Idx);
+ }
}
inline ALWAYS_INLINE uintptr_t GetPreviousInstructionPc(uintptr_t PC) {