diff options
Diffstat (limited to 'llvm_mode/afl-llvm-lto-instrumentation.so.cc')
| -rw-r--r-- | llvm_mode/afl-llvm-lto-instrumentation.so.cc | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/llvm_mode/afl-llvm-lto-instrumentation.so.cc b/llvm_mode/afl-llvm-lto-instrumentation.so.cc index 46a97e54..430cb0ad 100644 --- a/llvm_mode/afl-llvm-lto-instrumentation.so.cc +++ b/llvm_mode/afl-llvm-lto-instrumentation.so.cc @@ -130,9 +130,7 @@ bool AFLLTOPass::runOnModule(Module &M) { if (getenv("AFL_LLVM_MAP_DYNAMIC")) map_addr = 0; - if (getenv("AFL_LLVM_INSTRIM_SKIPSINGLEBLOCK") || - getenv("AFL_LLVM_SKIPSINGLEBLOCK")) - function_minimum_size = 2; + if (getenv("AFL_LLVM_SKIPSINGLEBLOCK")) function_minimum_size = 2; if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) { @@ -540,6 +538,8 @@ bool AFLLTOPass::runOnModule(Module &M) { uint32_t succ = 0; + if (F.size() == 1) InsBlocks.push_back(&BB); + for (succ_iterator SI = succ_begin(&BB), SE = succ_end(&BB); SI != SE; ++SI) if ((*SI)->size() > 0) succ++; @@ -558,9 +558,12 @@ bool AFLLTOPass::runOnModule(Module &M) { do { --i; + BasicBlock * newBB; BasicBlock * origBB = &(*InsBlocks[i]); std::vector<BasicBlock *> Successors; Instruction * TI = origBB->getTerminator(); + uint32_t fs = origBB->getParent()->size(); + uint32_t countto; for (succ_iterator SI = succ_begin(origBB), SE = succ_end(origBB); SI != SE; ++SI) { @@ -570,15 +573,25 @@ bool AFLLTOPass::runOnModule(Module &M) { } - if (TI == NULL || TI->getNumSuccessors() < 2) continue; + if (fs == 1) { + + newBB = origBB; + countto = 1; + + } else { + + if (TI == NULL || TI->getNumSuccessors() < 2) continue; + countto = Successors.size(); + + } // if (Successors.size() != TI->getNumSuccessors()) // FATAL("Different successor numbers %lu <-> %u\n", Successors.size(), // TI->getNumSuccessors()); - for (uint32_t j = 0; j < Successors.size(); j++) { + for (uint32_t j = 0; j < countto; j++) { - BasicBlock *newBB = llvm::SplitEdge(origBB, Successors[j]); + if (fs != 1) newBB = llvm::SplitEdge(origBB, Successors[j]); if (!newBB) { @@ -589,8 +602,7 @@ bool AFLLTOPass::runOnModule(Module &M) { if (documentFile) { - fprintf(documentFile, "%s %u\n", - origBB->getParent()->getName().str().c_str(), + fprintf(documentFile, "%s %u\n", F.getName().str().c_str(), afl_global_id); } @@ -627,7 +639,7 @@ bool AFLLTOPass::runOnModule(Module &M) { Value *Incr = IRB.CreateAdd(Counter, One); - if (skip_nozero) { + if (skip_nozero == NULL) { auto cf = IRB.CreateICmpEQ(Incr, Zero); auto carry = IRB.CreateZExt(cf, Int8Ty); |