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fix classic threadsafe counters

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This commit is contained in:
vanhauser-thc
2021-06-01 11:28:31 +02:00
parent 07c3e47e6b
commit b9799bbe1d
1 changed files with 23 additions and 15 deletions
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18
instrumentation/afl-llvm-pass.so.cc
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@ -662,25 +662,30 @@ bool AFLCoverage::runOnModule(Module &M) {
/* Update bitmap */ /* Update bitmap */
if (use_threadsafe_counters) { /* Atomic */ if (use_threadsafe_counters) { /* Atomic */
/*
#if LLVM_VERSION_MAJOR < 9 #if LLVM_VERSION_MAJOR < 9
if (neverZero_counters_str != if (neverZero_counters_str !=
NULL) { // with llvm 9 we make this the default as the bug in llvm NULL) { // with llvm 9 we make this the default as the bug
in llvm
// is then fixed // is then fixed
#else #else
if (!skip_nozero) { if (!skip_nozero) {
#endif #endif
// register MapPtrIdx in a todo list // register MapPtrIdx in a todo list
todo.push_back(MapPtrIdx); todo.push_back(MapPtrIdx);
} else { } else {
*/
IRB.CreateAtomicRMW(llvm::AtomicRMWInst::BinOp::Add, MapPtrIdx, One, IRB.CreateAtomicRMW(llvm::AtomicRMWInst::BinOp::Add, MapPtrIdx, One,
llvm::AtomicOrdering::Monotonic); llvm::AtomicOrdering::Monotonic);
/*
} }
*/
} else { } else {
LoadInst *Counter = IRB.CreateLoad(MapPtrIdx); LoadInst *Counter = IRB.CreateLoad(MapPtrIdx);
@ -774,6 +779,7 @@ bool AFLCoverage::runOnModule(Module &M) {
} }
#if 0
if (use_threadsafe_counters) { /*Atomic NeverZero */ if (use_threadsafe_counters) { /*Atomic NeverZero */
// handle the list of registered blocks to instrument // handle the list of registered blocks to instrument
for (auto val : todo) { for (auto val : todo) {
@ -885,6 +891,8 @@ bool AFLCoverage::runOnModule(Module &M) {
} }
#endif
} }
/* /*