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converted afl-llvm-pass to new pass manager

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This commit is contained in:
hexcoder-
2021-10-12 23:02:15 +02:00
parent 8e66289809
commit 544a65db54
2 changed files with 51 additions and 18 deletions
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59
instrumentation/afl-llvm-pass.so.cc
View File

@ -45,12 +45,15 @@ typedef long double max_align_t;
#endif
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Passes/PassPlugin.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/IR/PassManager.h"
//#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
//#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#if LLVM_VERSION_MAJOR > 3 || \
(LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR > 4)
@ -68,17 +71,18 @@ using namespace llvm;
namespace {
class AFLCoverage : public ModulePass {
//class AFLCoverage : public ModulePass {
class AFLCoverage : public PassInfoMixin<AFLCoverage> {
public:
static char ID;
AFLCoverage() : ModulePass(ID) {
// static char ID;
AFLCoverage() {
initInstrumentList();
}
bool runOnModule(Module &M) override;
PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
protected:
uint32_t ngram_size = 0;
@ -92,7 +96,38 @@ class AFLCoverage : public ModulePass {
} // namespace
char AFLCoverage::ID = 0;
extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK
llvmGetPassPluginInfo() {
return {
LLVM_PLUGIN_API_VERSION, "AFLCoverage", "v0.1",
/* lambda to insert our pass into the pass pipeline. */
[](PassBuilder &PB) {
#if 1
using OptimizationLevel = typename PassBuilder::OptimizationLevel;
PB.registerOptimizerLastEPCallback(
[](ModulePassManager &MPM, OptimizationLevel OL) {
MPM.addPass(AFLCoverage());
}
);
/* TODO LTO registration */
#else
using PipelineElement = typename PassBuilder::PipelineElement;
PB.registerPipelineParsingCallback(
[](StringRef Name, ModulePassManager &MPM, ArrayRef<PipelineElement>) {
if ( Name == "AFLCoverage" ) {
MPM.addPass(AFLCoverage);
return true;
} else {
return false;
}
}
);
#endif
}
};
}
//char AFLCoverage::ID = 0;
/* needed up to 3.9.0 */
#if LLVM_VERSION_MAJOR == 3 && \
@ -118,7 +153,7 @@ uint64_t PowerOf2Ceil(unsigned in) {
(LLVM_VERSION_MAJOR == 4 && LLVM_VERSION_PATCH >= 1)
#define AFL_HAVE_VECTOR_INTRINSICS 1
#endif
bool AFLCoverage::runOnModule(Module &M) {
PreservedAnalyses AFLCoverage::run(Module &M, ModuleAnalysisManager &MAM) {
LLVMContext &C = M.getContext();
@ -133,6 +168,8 @@ bool AFLCoverage::runOnModule(Module &M) {
u32 rand_seed;
unsigned int cur_loc = 0;
auto PA = PreservedAnalyses::none();
/* Setup random() so we get Actually Random(TM) outputs from AFL_R() */
gettimeofday(&tv, &tz);
rand_seed = tv.tv_sec ^ tv.tv_usec ^ getpid();
@ -969,10 +1006,10 @@ bool AFLCoverage::runOnModule(Module &M) {
}
return true;
return PA;
}
#if 0
static void registerAFLPass(const PassManagerBuilder &,
legacy::PassManagerBase &PM) {
@ -985,4 +1022,4 @@ static RegisterStandardPasses RegisterAFLPass(
static RegisterStandardPasses RegisterAFLPass0(
PassManagerBuilder::EP_EnabledOnOptLevel0, registerAFLPass);
#endif

10
src/afl-cc.c
View File

@ -500,12 +500,10 @@ static void edit_params(u32 argc, char **argv, char **envp) {
} else {
// cc_params[cc_par_cnt++] = "-Xclang";
// cc_params[cc_par_cnt++] = "-load";
// cc_params[cc_par_cnt++] = "-Xclang";
cc_params[cc_par_cnt++] = "-fexperimental-new-pass-manager";
cc_params[cc_par_cnt++] =
alloc_printf("-fpass-plugin=%s/split-compares-pass.so", obj_path);
// cc_params[cc_par_cnt++] = "-fno-experimental-new-pass-manager";
}
@ -629,10 +627,8 @@ static void edit_params(u32 argc, char **argv, char **envp) {
} else {
cc_params[cc_par_cnt++] = "-Xclang";
cc_params[cc_par_cnt++] = "-load";
cc_params[cc_par_cnt++] = "-Xclang";
cc_params[cc_par_cnt++] = alloc_printf("%s/afl-llvm-pass.so", obj_path);
cc_params[cc_par_cnt++] = "-fexperimental-new-pass-manager";
cc_params[cc_par_cnt++] = alloc_printf("-fpass-plugin=%s/afl-llvm-pass.so", obj_path);
}