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| author | Andrea Fioraldi <andreafioraldi@gmail.com> | 2021-03-04 11:00:54 +0100 |
|---|---|---|
| committer | Andrea Fioraldi <andreafioraldi@gmail.com> | 2021-03-04 11:00:54 +0100 |
| commit | 0e736276e6421162da0070e98d17d25b9a679de0 (patch) | |
| tree | 75601c459064e2a26a5d148fb3f3f0cb76f497ae | |
| parent | 08ef8d6b787f1a04b5ec3644d7ecae41d2668193 (diff) | |
| download | afl++-0e736276e6421162da0070e98d17d25b9a679de0.tar.gz | |
restore correct CTX behaviour in llvm mode
| -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)); |