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#define AFL_LLVM_PASS
#include "llvm/Pass.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/raw_ostream.h"
#if LLVM_VERSION_MAJOR >= 11
#include "llvm/Passes/PassPlugin.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/IR/PassManager.h"
#else
#include "llvm/IR/LegacyPassManager.h"
#endif
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "debug.h"
using namespace llvm;
#include <iostream>
#include <string>
#include <unistd.h>
namespace
{
#if LLVM_VERSION_MAJOR >= 11
class LTOMarker : public PassInfoMixin<LTOMarker>
{
public:
LTOMarker() { }
PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
};
#else
class LTOMarker : public ModulePass
{
public:
static char ID;
LTOMarker() : ModulePass(ID) { }
bool runOnModule(Module &M) override;
};
#endif // LLVM_VERSION_MAJOR >= 11
} // namespace
#if LLVM_MAJOR >= 11
extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK
llvmGetPassPluginInfo()
{
return {LLVM_PLUGIN_API_VERSION, "LTOMarker", "v0.1",
/* lambda to insert our pass into the pass pipeline. */
[](PassBuilder &PB)
{
#if LLVM_VERSION_MAJOR <= 13
using OptimizationLevel = typename PassBuilder::OptimizationLevel;
#endif
PB.registerOptimizerLastEPCallback(
[](ModulePassManager &MPM, OptimizationLevel OL)
{
MPM.addPass(LTOMarker());
});
}};
}
#else
char LTOMarker::ID = 0;
#endif
#if LLVM_VERSION_MAJOR >= 11
PreservedAnalyses LTOMarker::run(Module &M, ModuleAnalysisManager &MAM)
#else
bool LTOMarker::runOnModule(Module &M)
#endif
{
using namespace std;
LLVMContext &C = M.getContext();
bool output = isatty(2) && !getenv("AFL_QUIET");
if (output)
OKF("Start LTO Marking");
for (auto &F : M)
{
// cout << F.getName().str() << endl;
for (auto &BB : F)
{
BB.getTerminator()->setMetadata(
M.getMDKindID("keybranch"), MDNode::get(C, None));
}
}
if (output)
OKF("Finish LTO Marking");
#if LLVM_VERSION_MAJOR >= 11
return PreservedAnalyses::all();
#else
return true;
#endif
}
#if LLVM_VERSION_MAJOR < 11
static void registerLTOPass(
const PassManagerBuilder &, legacy::PassManagerBase &PM)
{
PM.add(new LTOMarker());
}
static RegisterStandardPasses RegisterLTOPass(
PassManagerBuilder::EP_OptimizerLast, registerLTOPass);
static RegisterStandardPasses RegisterLTOPass0(
PassManagerBuilder::EP_EnabledOnOptLevel0, registerLTOPass);
#endif
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