diff options
| -rw-r--r-- | instrumentation/afl-llvm-pass.so.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/instrumentation/afl-llvm-pass.so.cc b/instrumentation/afl-llvm-pass.so.cc index 16fd9c94..87267e35 100644 --- a/instrumentation/afl-llvm-pass.so.cc +++ b/instrumentation/afl-llvm-pass.so.cc @@ -354,7 +354,8 @@ bool AFLCoverage::runOnModule(Module &M) { // if yes we store a context ID for this function in the global var if (has_calls) { - ConstantInt *NewCtx = ConstantInt::get(Int32Ty, AFL_R(map_size)); + Value *NewCtx = IRB.CreateXor( + PrevCtx, ConstantInt::get(Int32Ty, AFL_R(map_size))); StoreInst * StoreCtx = IRB.CreateStore(NewCtx, AFLContext); StoreCtx->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None)); |