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Diffstat (limited to 'llvm_mode/SanitizerCoverageLTO.so.cc')
| -rw-r--r-- | llvm_mode/SanitizerCoverageLTO.so.cc | 1503 |
1 files changed, 0 insertions, 1503 deletions
diff --git a/llvm_mode/SanitizerCoverageLTO.so.cc b/llvm_mode/SanitizerCoverageLTO.so.cc deleted file mode 100644 index 1dd65188..00000000 --- a/llvm_mode/SanitizerCoverageLTO.so.cc +++ /dev/null @@ -1,1503 +0,0 @@ -/* SanitizeCoverage.cpp ported to afl++ LTO :-) */ - -#define AFL_LLVM_PASS - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <sys/time.h> - -#include <list> -#include <string> -#include <fstream> -#include <set> - -#include "llvm/Transforms/Instrumentation/SanitizerCoverage.h" -#include "llvm/ADT/ArrayRef.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/Analysis/EHPersonalities.h" -#include "llvm/Analysis/PostDominators.h" -#include "llvm/Analysis/ValueTracking.h" -#include "llvm/IR/BasicBlock.h" -#include "llvm/IR/CFG.h" -#include "llvm/IR/Constant.h" -#include "llvm/IR/DataLayout.h" -#include "llvm/IR/DebugInfo.h" -#include "llvm/IR/Dominators.h" -#include "llvm/IR/Function.h" -#include "llvm/IR/GlobalVariable.h" -#include "llvm/IR/IRBuilder.h" -#include "llvm/IR/InlineAsm.h" -#include "llvm/IR/Instructions.h" -#include "llvm/IR/IntrinsicInst.h" -#include "llvm/IR/Intrinsics.h" -#include "llvm/IR/LegacyPassManager.h" -#include "llvm/IR/LLVMContext.h" -#include "llvm/IR/MDBuilder.h" -#include "llvm/IR/Mangler.h" -#include "llvm/IR/Module.h" -#include "llvm/IR/Type.h" -#include "llvm/InitializePasses.h" -#include "llvm/Pass.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/SpecialCaseList.h" -#include "llvm/Support/VirtualFileSystem.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/Transforms/Instrumentation.h" -#include "llvm/Transforms/IPO/PassManagerBuilder.h" -#include "llvm/Transforms/Utils/BasicBlockUtils.h" -#include "llvm/Transforms/Utils/BasicBlockUtils.h" -#include "llvm/Transforms/Utils/ModuleUtils.h" - -#include "config.h" -#include "debug.h" -#include "afl-llvm-common.h" - -using namespace llvm; - -#define DEBUG_TYPE "sancov" - -static const char *const SanCovTracePCIndirName = - "__sanitizer_cov_trace_pc_indir"; -static const char *const SanCovTracePCName = "__sanitizer_cov_trace_pc"; -// static const char *const SanCovTracePCGuardName = -// "__sanitizer_cov_trace_pc_guard"; -static const char *const SanCovGuardsSectionName = "sancov_guards"; -static const char *const SanCovCountersSectionName = "sancov_cntrs"; -static const char *const SanCovBoolFlagSectionName = "sancov_bools"; -static const char *const SanCovPCsSectionName = "sancov_pcs"; - -static cl::opt<int> ClCoverageLevel( - "lto-coverage-level", - cl::desc("Sanitizer Coverage. 0: none, 1: entry block, 2: all blocks, " - "3: all blocks and critical edges"), - cl::Hidden, cl::init(3)); - -static cl::opt<bool> ClTracePC("lto-coverage-trace-pc", - cl::desc("Experimental pc tracing"), cl::Hidden, - cl::init(false)); - -static cl::opt<bool> ClTracePCGuard("lto-coverage-trace-pc-guard", - cl::desc("pc tracing with a guard"), - cl::Hidden, cl::init(false)); - -// If true, we create a global variable that contains PCs of all instrumented -// BBs, put this global into a named section, and pass this section's bounds -// to __sanitizer_cov_pcs_init. -// This way the coverage instrumentation does not need to acquire the PCs -// at run-time. Works with trace-pc-guard, inline-8bit-counters, and -// inline-bool-flag. -static cl::opt<bool> ClCreatePCTable("lto-coverage-pc-table", - cl::desc("create a static PC table"), - cl::Hidden, cl::init(false)); - -static cl::opt<bool> ClInline8bitCounters( - "lto-coverage-inline-8bit-counters", - cl::desc("increments 8-bit counter for every edge"), cl::Hidden, - cl::init(false)); - -static cl::opt<bool> ClInlineBoolFlag( - "lto-coverage-inline-bool-flag", - cl::desc("sets a boolean flag for every edge"), cl::Hidden, - cl::init(false)); - -static cl::opt<bool> ClPruneBlocks( - "lto-coverage-prune-blocks", - cl::desc("Reduce the number of instrumented blocks"), cl::Hidden, - cl::init(true)); - -namespace { - -SanitizerCoverageOptions getOptions(int LegacyCoverageLevel) { - - SanitizerCoverageOptions Res; - switch (LegacyCoverageLevel) { - - case 0: - Res.CoverageType = SanitizerCoverageOptions::SCK_None; - break; - case 1: - Res.CoverageType = SanitizerCoverageOptions::SCK_Function; - break; - case 2: - Res.CoverageType = SanitizerCoverageOptions::SCK_BB; - break; - case 3: - Res.CoverageType = SanitizerCoverageOptions::SCK_Edge; - break; - case 4: - Res.CoverageType = SanitizerCoverageOptions::SCK_Edge; - Res.IndirectCalls = true; - break; - - } - - return Res; - -} - -SanitizerCoverageOptions OverrideFromCL(SanitizerCoverageOptions Options) { - - // Sets CoverageType and IndirectCalls. - SanitizerCoverageOptions CLOpts = getOptions(ClCoverageLevel); - Options.CoverageType = std::max(Options.CoverageType, CLOpts.CoverageType); - Options.IndirectCalls |= CLOpts.IndirectCalls; - Options.TracePC |= ClTracePC; - Options.TracePCGuard |= ClTracePCGuard; - Options.Inline8bitCounters |= ClInline8bitCounters; - Options.InlineBoolFlag |= ClInlineBoolFlag; - Options.PCTable |= ClCreatePCTable; - Options.NoPrune |= !ClPruneBlocks; - if (!Options.TracePCGuard && !Options.TracePC && - !Options.Inline8bitCounters && !Options.InlineBoolFlag) - Options.TracePCGuard = true; // TracePCGuard is default. - return Options; - -} - -using DomTreeCallback = function_ref<const DominatorTree *(Function &F)>; -using PostDomTreeCallback = - function_ref<const PostDominatorTree *(Function &F)>; - -class ModuleSanitizerCoverage { - - public: - ModuleSanitizerCoverage( - const SanitizerCoverageOptions &Options = SanitizerCoverageOptions()) - : Options(OverrideFromCL(Options)) { - - /* , - const SpecialCaseList * Allowlist = nullptr, - const SpecialCaseList * Blocklist = nullptr) - , - Allowlist(Allowlist), - Blocklist(Blocklist) { - - */ - - } - - bool instrumentModule(Module &M, DomTreeCallback DTCallback, - PostDomTreeCallback PDTCallback); - - private: - void instrumentFunction(Function &F, DomTreeCallback DTCallback, - PostDomTreeCallback PDTCallback); - void InjectCoverageForIndirectCalls(Function & F, - ArrayRef<Instruction *> IndirCalls); - bool InjectCoverage(Function &F, ArrayRef<BasicBlock *> AllBlocks, - bool IsLeafFunc = true); - GlobalVariable *CreateFunctionLocalArrayInSection(size_t NumElements, - Function &F, Type *Ty, - const char *Section); - GlobalVariable *CreatePCArray(Function &F, ArrayRef<BasicBlock *> AllBlocks); - void CreateFunctionLocalArrays(Function &F, ArrayRef<BasicBlock *> AllBlocks); - void InjectCoverageAtBlock(Function &F, BasicBlock &BB, size_t Idx, - bool IsLeafFunc = true); - std::pair<Value *, Value *> CreateSecStartEnd(Module &M, const char *Section, - Type *Ty); - - void SetNoSanitizeMetadata(Instruction *I) { - - I->setMetadata(I->getModule()->getMDKindID("nosanitize"), - MDNode::get(*C, None)); - - } - - std::string getSectionName(const std::string &Section) const; - std::string getSectionStart(const std::string &Section) const; - std::string getSectionEnd(const std::string &Section) const; - FunctionCallee SanCovTracePCIndir; - FunctionCallee SanCovTracePC /*, SanCovTracePCGuard*/; - Type *IntptrTy, *IntptrPtrTy, *Int64Ty, *Int64PtrTy, *Int32Ty, *Int32PtrTy, - *Int16Ty, *Int8Ty, *Int8PtrTy, *Int1Ty, *Int1PtrTy; - Module * CurModule; - std::string CurModuleUniqueId; - Triple TargetTriple; - LLVMContext * C; - const DataLayout *DL; - - GlobalVariable *FunctionGuardArray; // for trace-pc-guard. - GlobalVariable *Function8bitCounterArray; // for inline-8bit-counters. - GlobalVariable *FunctionBoolArray; // for inline-bool-flag. - GlobalVariable *FunctionPCsArray; // for pc-table. - SmallVector<GlobalValue *, 20> GlobalsToAppendToUsed; - SmallVector<GlobalValue *, 20> GlobalsToAppendToCompilerUsed; - - SanitizerCoverageOptions Options; - - // afl++ START - // const SpecialCaseList * Allowlist; - // const SpecialCaseList * Blocklist; - uint32_t autodictionary = 1; - uint32_t inst = 0; - uint32_t afl_global_id = 0; - uint64_t map_addr = 0; - char * skip_nozero = NULL; - std::vector<BasicBlock *> BlockList; - DenseMap<Value *, std::string *> valueMap; - std::vector<std::string> dictionary; - IntegerType * Int8Tyi = NULL; - IntegerType * Int32Tyi = NULL; - IntegerType * Int64Tyi = NULL; - ConstantInt * Zero = NULL; - ConstantInt * One = NULL; - LLVMContext * Ct = NULL; - Module * Mo = NULL; - GlobalVariable * AFLMapPtr = NULL; - Value * MapPtrFixed = NULL; - FILE * documentFile = NULL; - // afl++ END - -}; - -class ModuleSanitizerCoverageLegacyPass : public ModulePass { - - public: - static char ID; - StringRef getPassName() const override { - - return "sancov"; - - } - - void getAnalysisUsage(AnalysisUsage &AU) const override { - - AU.addRequired<DominatorTreeWrapperPass>(); - AU.addRequired<PostDominatorTreeWrapperPass>(); - - } - - ModuleSanitizerCoverageLegacyPass( - const SanitizerCoverageOptions &Options = SanitizerCoverageOptions()) - : ModulePass(ID), Options(Options) { - - /* , - const std::vector<std::string> &AllowlistFiles = - std::vector<std::string>(), - const std::vector<std::string> &BlocklistFiles = - std::vector<std::string>()) - if (AllowlistFiles.size() > 0) - Allowlist = SpecialCaseList::createOrDie(AllowlistFiles, - *vfs::getRealFileSystem()); - if (BlocklistFiles.size() > 0) - Blocklist = SpecialCaseList::createOrDie(BlocklistFiles, - *vfs::getRealFileSystem()); - */ - initializeModuleSanitizerCoverageLegacyPassPass( - *PassRegistry::getPassRegistry()); - - } - - bool runOnModule(Module &M) override { - - ModuleSanitizerCoverage ModuleSancov(Options); - // , Allowlist.get(), Blocklist.get()); - auto DTCallback = [this](Function &F) -> const DominatorTree * { - - return &this->getAnalysis<DominatorTreeWrapperPass>(F).getDomTree(); - - }; - - auto PDTCallback = [this](Function &F) -> const PostDominatorTree * { - - return &this->getAnalysis<PostDominatorTreeWrapperPass>(F) - .getPostDomTree(); - - }; - - return ModuleSancov.instrumentModule(M, DTCallback, PDTCallback); - - } - - private: - SanitizerCoverageOptions Options; - - // std::unique_ptr<SpecialCaseList> Allowlist; - // std::unique_ptr<SpecialCaseList> Blocklist; - -}; - -} // namespace - -PreservedAnalyses ModuleSanitizerCoveragePass::run(Module & M, - ModuleAnalysisManager &MAM) { - - ModuleSanitizerCoverage ModuleSancov(Options); - // Allowlist.get(), Blocklist.get()); - auto &FAM = MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager(); - auto DTCallback = [&FAM](Function &F) -> const DominatorTree * { - - return &FAM.getResult<DominatorTreeAnalysis>(F); - - }; - - auto PDTCallback = [&FAM](Function &F) -> const PostDominatorTree * { - - return &FAM.getResult<PostDominatorTreeAnalysis>(F); - - }; - - if (ModuleSancov.instrumentModule(M, DTCallback, PDTCallback)) - return PreservedAnalyses::none(); - - return PreservedAnalyses::all(); - -} - -std::pair<Value *, Value *> ModuleSanitizerCoverage::CreateSecStartEnd( - Module &M, const char *Section, Type *Ty) { - - GlobalVariable *SecStart = - new GlobalVariable(M, Ty, false, GlobalVariable::ExternalLinkage, nullptr, - getSectionStart(Section)); - SecStart->setVisibility(GlobalValue::HiddenVisibility); - GlobalVariable *SecEnd = - new GlobalVariable(M, Ty, false, GlobalVariable::ExternalLinkage, nullptr, - getSectionEnd(Section)); - SecEnd->setVisibility(GlobalValue::HiddenVisibility); - IRBuilder<> IRB(M.getContext()); - Value * SecEndPtr = IRB.CreatePointerCast(SecEnd, Ty); - if (!TargetTriple.isOSBinFormatCOFF()) - return std::make_pair(IRB.CreatePointerCast(SecStart, Ty), SecEndPtr); - - // Account for the fact that on windows-msvc __start_* symbols actually - // point to a uint64_t before the start of the array. - auto SecStartI8Ptr = IRB.CreatePointerCast(SecStart, Int8PtrTy); - auto GEP = IRB.CreateGEP(Int8Ty, SecStartI8Ptr, - ConstantInt::get(IntptrTy, sizeof(uint64_t))); - return std::make_pair(IRB.CreatePointerCast(GEP, Ty), SecEndPtr); - -} - -bool ModuleSanitizerCoverage::instrumentModule( - Module &M, DomTreeCallback DTCallback, PostDomTreeCallback PDTCallback) { - - if (Options.CoverageType == SanitizerCoverageOptions::SCK_None) return false; - /* - if (Allowlist && - !Allowlist->inSection("coverage", "src", M.getSourceFileName())) - return false; - if (Blocklist && - Blocklist->inSection("coverage", "src", M.getSourceFileName())) - return false; - */ - BlockList.clear(); - valueMap.clear(); - dictionary.clear(); - C = &(M.getContext()); - DL = &M.getDataLayout(); - CurModule = &M; - CurModuleUniqueId = getUniqueModuleId(CurModule); - TargetTriple = Triple(M.getTargetTriple()); - FunctionGuardArray = nullptr; - Function8bitCounterArray = nullptr; - FunctionBoolArray = nullptr; - FunctionPCsArray = nullptr; - IntptrTy = Type::getIntNTy(*C, DL->getPointerSizeInBits()); - IntptrPtrTy = PointerType::getUnqual(IntptrTy); - Type * VoidTy = Type::getVoidTy(*C); - IRBuilder<> IRB(*C); - Int64PtrTy = PointerType::getUnqual(IRB.getInt64Ty()); - Int32PtrTy = PointerType::getUnqual(IRB.getInt32Ty()); - Int8PtrTy = PointerType::getUnqual(IRB.getInt8Ty()); - Int1PtrTy = PointerType::getUnqual(IRB.getInt1Ty()); - Int64Ty = IRB.getInt64Ty(); - Int32Ty = IRB.getInt32Ty(); - Int16Ty = IRB.getInt16Ty(); - Int8Ty = IRB.getInt8Ty(); - Int1Ty = IRB.getInt1Ty(); - - /* afl++ START */ - char * ptr; - LLVMContext &Ctx = M.getContext(); - Ct = &Ctx; - Int8Tyi = IntegerType::getInt8Ty(Ctx); - Int32Tyi = IntegerType::getInt32Ty(Ctx); - Int64Tyi = IntegerType::getInt64Ty(Ctx); - - /* Show a banner */ - setvbuf(stdout, NULL, _IONBF, 0); - if (getenv("AFL_DEBUG")) debug = 1; - - if ((isatty(2) && !getenv("AFL_QUIET")) || debug) { - - SAYF(cCYA "afl-llvm-lto" VERSION cRST - " by Marc \"vanHauser\" Heuse <mh@mh-sec.de>\n"); - - } else - - be_quiet = 1; - - skip_nozero = getenv("AFL_LLVM_SKIP_NEVERZERO"); - - if ((ptr = getenv("AFL_LLVM_LTO_STARTID")) != NULL) - if ((afl_global_id = atoi(ptr)) < 0) - FATAL("AFL_LLVM_LTO_STARTID value of \"%s\" is negative\n", ptr); - - if ((ptr = getenv("AFL_LLVM_DOCUMENT_IDS")) != NULL) { - - if ((documentFile = fopen(ptr, "a")) == NULL) - WARNF("Cannot access document file %s", ptr); - - } - - // we make this the default as the fixed map has problems with - // defered forkserver, early constructors, ifuncs and maybe more - /*if (getenv("AFL_LLVM_MAP_DYNAMIC"))*/ - map_addr = 0; - - if ((ptr = getenv("AFL_LLVM_MAP_ADDR"))) { - - uint64_t val; - if (!*ptr || !strcmp(ptr, "0") || !strcmp(ptr, "0x0")) { - - map_addr = 0; - - } else if (getenv("AFL_LLVM_MAP_DYNAMIC")) { - - FATAL( - "AFL_LLVM_MAP_ADDR and AFL_LLVM_MAP_DYNAMIC cannot be used together"); - - } else if (strncmp(ptr, "0x", 2) != 0) { - - map_addr = 0x10000; // the default - - } else { - - val = strtoull(ptr, NULL, 16); - if (val < 0x100 || val > 0xffffffff00000000) { - - FATAL( - "AFL_LLVM_MAP_ADDR must be a value between 0x100 and " - "0xffffffff00000000"); - - } - - map_addr = val; - - } - - } - - /* Get/set the globals for the SHM region. */ - - if (!map_addr) { - - AFLMapPtr = - new GlobalVariable(M, PointerType::get(Int8Tyi, 0), false, - GlobalValue::ExternalLinkage, 0, "__afl_area_ptr"); - - } else { - - ConstantInt *MapAddr = ConstantInt::get(Int64Tyi, map_addr); - MapPtrFixed = - ConstantExpr::getIntToPtr(MapAddr, PointerType::getUnqual(Int8Tyi)); - - } - - Zero = ConstantInt::get(Int8Tyi, 0); - One = ConstantInt::get(Int8Tyi, 1); - - scanForDangerousFunctions(&M); - Mo = &M; - - if (autodictionary) { - - for (auto &F : M) { - - for (auto &BB : F) { - - for (auto &IN : BB) { - - CallInst *callInst = nullptr; - - if ((callInst = dyn_cast<CallInst>(&IN))) { - - bool isStrcmp = true; - bool isMemcmp = true; - bool isStrncmp = true; - bool isStrcasecmp = true; - bool isStrncasecmp = true; - bool isIntMemcpy = true; - bool addedNull = false; - size_t optLen = 0; - - Function *Callee = callInst->getCalledFunction(); - if (!Callee) continue; - if (callInst->getCallingConv() != llvm::CallingConv::C) continue; - std::string FuncName = Callee->getName().str(); - isStrcmp &= !FuncName.compare("strcmp"); - isMemcmp &= !FuncName.compare("memcmp"); - isStrncmp &= !FuncName.compare("strncmp"); - isStrcasecmp &= !FuncName.compare("strcasecmp"); - isStrncasecmp &= !FuncName.compare("strncasecmp"); - isIntMemcpy &= !FuncName.compare("llvm.memcpy.p0i8.p0i8.i64"); - - /* we do something different here, putting this BB and the - successors in a block map */ - if (!FuncName.compare("__afl_persistent_loop")) { - - BlockList.push_back(&BB); - for (succ_iterator SI = succ_begin(&BB), SE = succ_end(&BB); - SI != SE; ++SI) { - - BasicBlock *succ = *SI; - BlockList.push_back(succ); - - } - - } - - if (!isStrcmp && !isMemcmp && !isStrncmp && !isStrcasecmp && - !isStrncasecmp && !isIntMemcpy) - continue; - - /* Verify the strcmp/memcmp/strncmp/strcasecmp/strncasecmp function - * prototype */ - FunctionType *FT = Callee->getFunctionType(); - - isStrcmp &= FT->getNumParams() == 2 && - FT->getReturnType()->isIntegerTy(32) && - FT->getParamType(0) == FT->getParamType(1) && - FT->getParamType(0) == - IntegerType::getInt8PtrTy(M.getContext()); - isStrcasecmp &= FT->getNumParams() == 2 && - FT->getReturnType()->isIntegerTy(32) && - FT->getParamType(0) == FT->getParamType(1) && - FT->getParamType(0) == - IntegerType::getInt8PtrTy(M.getContext()); - isMemcmp &= FT->getNumParams() == 3 && - FT->getReturnType()->isIntegerTy(32) && - FT->getParamType(0)->isPointerTy() && - FT->getParamType(1)->isPointerTy() && - FT->getParamType(2)->isIntegerTy(); - isStrncmp &= FT->getNumParams() == 3 && - FT->getReturnType()->isIntegerTy(32) && - FT->getParamType(0) == FT->getParamType(1) && - FT->getParamType(0) == - IntegerType::getInt8PtrTy(M.getContext()) && - FT->getParamType(2)->isIntegerTy(); - isStrncasecmp &= FT->getNumParams() == 3 && - FT->getReturnType()->isIntegerTy(32) && - FT->getParamType(0) == FT->getParamType(1) && - FT->getParamType(0) == - IntegerType::getInt8PtrTy(M.getContext()) && - FT->getParamType(2)->isIntegerTy(); - - if (!isStrcmp && !isMemcmp && !isStrncmp && !isStrcasecmp && - !isStrncasecmp && !isIntMemcpy) - continue; - - /* is a str{n,}{case,}cmp/memcmp, check if we have - * str{case,}cmp(x, "const") or str{case,}cmp("const", x) - * strn{case,}cmp(x, "const", ..) or strn{case,}cmp("const", x, ..) - * memcmp(x, "const", ..) or memcmp("const", x, ..) */ - Value *Str1P = callInst->getArgOperand(0), - *Str2P = callInst->getArgOperand(1); - std::string Str1, Str2; - StringRef TmpStr; - bool HasStr1 = getConstantStringInfo(Str1P, TmpStr); - if (TmpStr.empty()) - HasStr1 = false; - else - Str1 = TmpStr.str(); - bool HasStr2 = getConstantStringInfo(Str2P, TmpStr); - if (TmpStr.empty()) - HasStr2 = false; - else - Str2 = TmpStr.str(); - - if (debug) - fprintf(stderr, "F:%s %p(%s)->\"%s\"(%s) %p(%s)->\"%s\"(%s)\n", - FuncName.c_str(), Str1P, Str1P->getName().str().c_str(), - Str1.c_str(), HasStr1 == true ? "true" : "false", Str2P, - Str2P->getName().str().c_str(), Str2.c_str(), - HasStr2 == true ? "true" : "false"); - - // we handle the 2nd parameter first because of llvm memcpy - if (!HasStr2) { - - auto *Ptr = dyn_cast<ConstantExpr>(Str2P); - if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) { - - if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) { - - if (Var->hasInitializer()) { - - if (auto *Array = dyn_cast<ConstantDataArray>( - Var->getInitializer())) { - - HasStr2 = true; - Str2 = Array->getAsString().str(); - - } - - } - - } - - } - - } - - // for the internal memcpy routine we only care for the second - // parameter and are not reporting anything. - if (isIntMemcpy == true) { - - if (HasStr2 == true) { - - Value * op2 = callInst->getArgOperand(2); - ConstantInt *ilen = dyn_cast<ConstantInt>(op2); - if (ilen) { - - uint64_t literalLength = Str2.size(); - uint64_t optLength = ilen->getZExtValue(); - if (literalLength + 1 == optLength) { - - Str2.append("\0", 1); // add null byte - addedNull = true; - - } - - } - - valueMap[Str1P] = new std::string(Str2); - - if (debug) - fprintf(stderr, "Saved: %s for %p\n", Str2.c_str(), Str1P); - continue; - - } - - continue; - - } - - // Neither a literal nor a global variable? - // maybe it is a local variable that we saved - if (!HasStr2) { - - std::string *strng = valueMap[Str2P]; - if (strng && !strng->empty()) { - - Str2 = *strng; - HasStr2 = true; - if (debug) - fprintf(stderr, "Filled2: %s for %p\n", strng->c_str(), - Str2P); - - } - - } - - if (!HasStr1) { - - auto Ptr = dyn_cast<ConstantExpr>(Str1P); - - if (Ptr && Ptr->isGEPWithNoNotionalOverIndexing()) { - - if (auto *Var = dyn_cast<GlobalVariable>(Ptr->getOperand(0))) { - - if (Var->hasInitializer()) { - - if (auto *Array = dyn_cast<ConstantDataArray>( - Var->getInitializer())) { - - HasStr1 = true; - Str1 = Array->getAsString().str(); - - } - - } - - } - - } - - } - - // Neither a literal nor a global variable? - // maybe it is a local variable that we saved - if (!HasStr1) { - - std::string *strng = valueMap[Str1P]; - if (strng && !strng->empty()) { - - Str1 = *strng; - HasStr1 = true; - if (debug) - fprintf(stderr, "Filled1: %s for %p\n", strng->c_str(), - Str1P); - - } - - } - - /* handle cases of one string is const, one string is variable */ - if (!(HasStr1 ^ HasStr2)) continue; - - std::string thestring; - - if (HasStr1) - thestring = Str1; - else - thestring = Str2; - - optLen = thestring.length(); - - if (isMemcmp || isStrncmp || isStrncasecmp) { - - Value * op2 = callInst->getArgOperand(2); - ConstantInt *ilen = dyn_cast<ConstantInt>(op2); - if (ilen) { - - uint64_t literalLength = optLen; - optLen = ilen->getZExtValue(); - if (literalLength + 1 == optLen) { // add null byte - thestring.append("\0", 1); - addedNull = true; - - } - - } - - } - - // add null byte if this is a string compare function and a null - // was not already added - if (!isMemcmp) { - - if (addedNull == false) { - - thestring.append("\0", 1); // add null byte - optLen++; - - } - - // ensure we do not have garbage - size_t offset = thestring.find('\0', 0); - if (offset + 1 < optLen) optLen = offset + 1; - thestring = thestring.substr(0, optLen); - - } - - if (!be_quiet) { - - std::string outstring; - fprintf(stderr, "%s: length %zu/%zu \"", FuncName.c_str(), optLen, - thestring.length()); - for (uint8_t i = 0; i < thestring.length(); i++) { - - uint8_t c = thestring[i]; - if (c <= 32 || c >= 127) - fprintf(stderr, "\\x%02x", c); - else - fprintf(stderr, "%c", c); - - } - - fprintf(stderr, "\"\n"); - - } - - // we take the longer string, even if the compare was to a - // shorter part. Note that depending on the optimizer of the - // compiler this can be wrong, but it is more likely that this - // is helping the fuzzer - if (optLen != thestring.length()) optLen = thestring.length(); - if (optLen > MAX_AUTO_EXTRA) optLen = MAX_AUTO_EXTRA; - if (optLen < MIN_AUTO_EXTRA) // too short? skip - continue; - - dictionary.push_back(thestring.substr(0, optLen)); - - } - - } - - } - - } - - } - - // afl++ END - - SanCovTracePCIndir = - M.getOrInsertFunction(SanCovTracePCIndirName, VoidTy, IntptrTy); - // Make sure smaller parameters are zero-extended to i64 as required by the - // x86_64 ABI. - AttributeList SanCovTraceCmpZeroExtAL; - if (TargetTriple.getArch() == Triple::x86_64) { - - SanCovTraceCmpZeroExtAL = - SanCovTraceCmpZeroExtAL.addParamAttribute(*C, 0, Attribute::ZExt); - SanCovTraceCmpZeroExtAL = - SanCovTraceCmpZeroExtAL.addParamAttribute(*C, 1, Attribute::ZExt); - - } - - SanCovTracePC = M.getOrInsertFunction(SanCovTracePCName, VoidTy); - - // SanCovTracePCGuard = - // M.getOrInsertFunction(SanCovTracePCGuardName, VoidTy, Int32PtrTy); - - for (auto &F : M) - instrumentFunction(F, DTCallback, PDTCallback); - - // afl++ START - if (documentFile) { - - fclose(documentFile); - documentFile = NULL; - - } - - if (!getenv("AFL_LLVM_LTO_DONTWRITEID") || dictionary.size() || map_addr) { - - // yes we could create our own function, insert it into ctors ... - // but this would be a pain in the butt ... so we use afl-llvm-rt-lto.o - - Function *f = M.getFunction("__afl_auto_init_globals"); - - if (!f) { - - fprintf(stderr, - "Error: init function could not be found (this should not " - "happen)\n"); - exit(-1); - - } - - BasicBlock *bb = &f->getEntryBlock(); - if (!bb) { - - fprintf(stderr, - "Error: init function does not have an EntryBlock (this should " - "not happen)\n"); - exit(-1); - - } - - BasicBlock::iterator IP = bb->getFirstInsertionPt(); - IRBuilder<> IRB(&(*IP)); - - if (map_addr) { - - GlobalVariable *AFLMapAddrFixed = new GlobalVariable( - M, Int64Tyi, true, GlobalValue::ExternalLinkage, 0, "__afl_map_addr"); - ConstantInt *MapAddr = ConstantInt::get(Int64Tyi, map_addr); - StoreInst * StoreMapAddr = IRB.CreateStore(MapAddr, AFLMapAddrFixed); - StoreMapAddr->setMetadata(M.getMDKindID("nosanitize"), - MDNode::get(Ctx, None)); - - } - - if (getenv("AFL_LLVM_LTO_DONTWRITEID") == NULL) { - - uint32_t write_loc = afl_global_id; - - if (afl_global_id % 8) write_loc = (((afl_global_id + 8) >> 3) << 3); - - GlobalVariable *AFLFinalLoc = - new GlobalVariable(M, Int32Tyi, true, GlobalValue::ExternalLinkage, 0, - "__afl_final_loc"); - ConstantInt *const_loc = ConstantInt::get(Int32Tyi, write_loc); - StoreInst * StoreFinalLoc = IRB.CreateStore(const_loc, AFLFinalLoc); - StoreFinalLoc->setMetadata(M.getMDKindID("nosanitize"), - MDNode::get(Ctx, None)); - - } - - if (dictionary.size()) { - - size_t memlen = 0, count = 0, offset = 0; - char * ptr; - - for (auto token : dictionary) { - - memlen += token.length(); - count++; - - } - - if (!be_quiet) - printf("AUTODICTIONARY: %lu string%s found\n", count, - count == 1 ? "" : "s"); - - if (count) { - - if ((ptr = (char *)malloc(memlen + count)) == NULL) { - - fprintf(stderr, "Error: malloc for %lu bytes failed!\n", - memlen + count); - exit(-1); - - } - - count = 0; - - for (auto token : dictionary) { - - if (offset + token.length() < 0xfffff0 && count < MAX_AUTO_EXTRAS) { - - ptr[offset++] = (uint8_t)token.length(); - memcpy(ptr + offset, token.c_str(), token.length()); - offset += token.length(); - count++; - - } - - } - - GlobalVariable *AFLDictionaryLen = - new GlobalVariable(M, Int32Tyi, false, GlobalValue::ExternalLinkage, - 0, "__afl_dictionary_len"); - ConstantInt *const_len = ConstantInt::get(Int32Tyi, offset); - StoreInst *StoreDictLen = IRB.CreateStore(const_len, AFLDictionaryLen); - StoreDictLen->setMetadata(M.getMDKindID("nosanitize"), - MDNode::get(Ctx, None)); - - ArrayType *ArrayTy = ArrayType::get(IntegerType::get(Ctx, 8), offset); - GlobalVariable *AFLInternalDictionary = new GlobalVariable( - M, ArrayTy, true, GlobalValue::ExternalLinkage, - ConstantDataArray::get(Ctx, - *(new ArrayRef<char>((char *)ptr, offset))), - "__afl_internal_dictionary"); - AFLInternalDictionary->setInitializer(ConstantDataArray::get( - Ctx, *(new ArrayRef<char>((char *)ptr, offset)))); - AFLInternalDictionary->setConstant(true); - - GlobalVariable *AFLDictionary = new GlobalVariable( - M, PointerType::get(Int8Tyi, 0), false, - GlobalValue::ExternalLinkage, 0, "__afl_dictionary"); - - Value *AFLDictOff = IRB.CreateGEP(AFLInternalDictionary, Zero); - Value *AFLDictPtr = - IRB.CreatePointerCast(AFLDictOff, PointerType::get(Int8Tyi, 0)); - StoreInst *StoreDict = IRB.CreateStore(AFLDictPtr, AFLDictionary); - StoreDict->setMetadata(M.getMDKindID("nosanitize"), - MDNode::get(Ctx, None)); - - } - - } - - } - - /* Say something nice. */ - - if (!be_quiet) { - - if (!inst) - WARNF("No instrumentation targets found."); - else { - - char modeline[100]; - snprintf(modeline, sizeof(modeline), "%s%s%s%s%s", - getenv("AFL_HARDEN") ? "hardened" : "non-hardened", - getenv("AFL_USE_ASAN") ? ", ASAN" : "", - getenv("AFL_USE_MSAN") ? ", MSAN" : "", - getenv("AFL_USE_CFISAN") ? ", CFISAN" : "", - getenv("AFL_USE_UBSAN") ? ", UBSAN" : ""); - OKF("Instrumented %u locations with no collisions (on average %llu " - "collisions would be in afl-gcc/afl-clang-fast) (%s mode).", - inst, calculateCollisions(inst), modeline); - - } - - } - - // afl++ END - - // We don't reference these arrays directly in any of our runtime functions, - // so we need to prevent them from being dead stripped. - if (TargetTriple.isOSBinFormatMachO()) appendToUsed(M, GlobalsToAppendToUsed); - appendToCompilerUsed(M, GlobalsToAppendToCompilerUsed); - return true; - -} - -// True if block has successors and it dominates all of them. -static bool isFullDominator(const BasicBlock *BB, const DominatorTree *DT) { - - if (succ_begin(BB) == succ_end(BB)) return false; - - for (const BasicBlock *SUCC : make_range(succ_begin(BB), succ_end(BB))) { - - if (!DT->dominates(BB, SUCC)) return false; - - } - - return true; - -} - -// True if block has predecessors and it postdominates all of them. -static bool isFullPostDominator(const BasicBlock * BB, - const PostDominatorTree *PDT) { - - if (pred_begin(BB) == pred_end(BB)) return false; - - for (const BasicBlock *PRED : make_range(pred_begin(BB), pred_end(BB))) { - - if (!PDT->dominates(BB, PRED)) return false; - - } - - return true; - -} - -static bool shouldInstrumentBlock(const Function &F, const BasicBlock *BB, - const DominatorTree * DT, - const PostDominatorTree * PDT, - const SanitizerCoverageOptions &Options) { - - // Don't insert coverage for blocks containing nothing but unreachable: we - // will never call __sanitizer_cov() for them, so counting them in - // NumberOfInstrumentedBlocks() might complicate calculation of code coverage - // percentage. Also, unreachable instructions frequently have no debug - // locations. - if (isa<UnreachableInst>(BB->getFirstNonPHIOrDbgOrLifetime())) return false; - - // Don't insert coverage into blocks without a valid insertion point - // (catchswitch blocks). - if (BB->getFirstInsertionPt() == BB->end()) return false; - - // afl++ START - if (!Options.NoPrune && &F.getEntryBlock() == BB && F.size() > 1) - return false; - // afl++ END - - if (Options.NoPrune || &F.getEntryBlock() == BB) return true; - - if (Options.CoverageType == SanitizerCoverageOptions::SCK_Function && - &F.getEntryBlock() != BB) - return false; - - // Do not instrument full dominators, or full post-dominators with multiple - // predecessors. - return !isFullDominator(BB, DT) && - !(isFullPostDominator(BB, PDT) && !BB->getSinglePredecessor()); - -} - -void ModuleSanitizerCoverage::instrumentFunction( - Function &F, DomTreeCallback DTCallback, PostDomTreeCallback PDTCallback) { - - if (F.empty()) return; - if (F.getName().find(".module_ctor") != std::string::npos) - return; // Should not instrument sanitizer init functions. - if (F.getName().startswith("__sanitizer_")) - return; // Don't instrument __sanitizer_* callbacks. - // Don't touch available_externally functions, their actual body is elewhere. - if (F.getLinkage() == GlobalValue::AvailableExternallyLinkage) return; - // Don't instrument MSVC CRT configuration helpers. They may run before normal - // initialization. - if (F.getName() == "__local_stdio_printf_options" || - F.getName() == "__local_stdio_scanf_options") - return; - if (isa<UnreachableInst>(F.getEntryBlock().getTerminator())) return; - // Don't instrument functions using SEH for now. Splitting basic blocks like - // we do for coverage breaks WinEHPrepare. - // FIXME: Remove this when SEH no longer uses landingpad pattern matching. - if (F.hasPersonalityFn() && - isAsynchronousEHPersonality(classifyEHPersonality(F.getPersonalityFn()))) - return; - // if (Allowlist && !Allowlist->inSection("coverage", "fun", F.getName())) - // return; - // if (Blocklist && Blocklist->inSection("coverage", "fun", F.getName())) - // return; - - // afl++ START - if (!F.size()) return; - if (isIgnoreFunction(&F)) return; - // afl++ END - - if (Options.CoverageType >= SanitizerCoverageOptions::SCK_Edge) - SplitAllCriticalEdges( - F, CriticalEdgeSplittingOptions().setIgnoreUnreachableDests()); - SmallVector<Instruction *, 8> IndirCalls; - SmallVector<BasicBlock *, 16> BlocksToInstrument; - - const DominatorTree * DT = DTCallback(F); - const PostDominatorTree *PDT = PDTCallback(F); - bool IsLeafFunc = true; - - for (auto &BB : F) { - - if (shouldInstrumentBlock(F, &BB, DT, PDT, Options)) - BlocksToInstrument.push_back(&BB); - for (auto &Inst : BB) { - - if (Options.IndirectCalls) { - - CallBase *CB = dyn_cast<CallBase>(&Inst); - if (CB && !CB->getCalledFunction()) IndirCalls.push_back(&Inst); - - } - - } - - } - - InjectCoverage(F, BlocksToInstrument, IsLeafFunc); - InjectCoverageForIndirectCalls(F, IndirCalls); - -} - -GlobalVariable *ModuleSanitizerCoverage::CreateFunctionLocalArrayInSection( - size_t NumElements, Function &F, Type *Ty, const char *Section) { - - ArrayType *ArrayTy = ArrayType::get(Ty, NumElements); - auto Array = new GlobalVariable( - *CurModule, ArrayTy, false, GlobalVariable::PrivateLinkage, - Constant::getNullValue(ArrayTy), "__sancov_gen_"); - - if (TargetTriple.supportsCOMDAT() && !F.isInterposable()) - if (auto Comdat = - GetOrCreateFunctionComdat(F, TargetTriple, CurModuleUniqueId)) - Array->setComdat(Comdat); - Array->setSection(getSectionName(Section)); - Array->setAlignment(Align(DL->getTypeStoreSize(Ty).getFixedSize())); - GlobalsToAppendToUsed.push_back(Array); - GlobalsToAppendToCompilerUsed.push_back(Array); - MDNode *MD = MDNode::get(F.getContext(), ValueAsMetadata::get(&F)); - Array->addMetadata(LLVMContext::MD_associated, *MD); - - return Array; - -} - -GlobalVariable *ModuleSanitizerCoverage::CreatePCArray( - Function &F, ArrayRef<BasicBlock *> AllBlocks) { - - size_t N = AllBlocks.size(); - assert(N); - SmallVector<Constant *, 32> PCs; - IRBuilder<> IRB(&*F.getEntryBlock().getFirstInsertionPt()); - for (size_t i = 0; i < N; i++) { - - if (&F.getEntryBlock() == AllBlocks[i]) { - - PCs.push_back((Constant *)IRB.CreatePointerCast(&F, IntptrPtrTy)); - PCs.push_back((Constant *)IRB.CreateIntToPtr( - ConstantInt::get(IntptrTy, 1), IntptrPtrTy)); - - } else { - - PCs.push_back((Constant *)IRB.CreatePointerCast( - BlockAddress::get(AllBlocks[i]), IntptrPtrTy)); - PCs.push_back((Constant *)IRB.CreateIntToPtr( - ConstantInt::get(IntptrTy, 0), IntptrPtrTy)); - - } - - } - - auto *PCArray = CreateFunctionLocalArrayInSection(N * 2, F, IntptrPtrTy, - SanCovPCsSectionName); - PCArray->setInitializer( - ConstantArray::get(ArrayType::get(IntptrPtrTy, N * 2), PCs)); - PCArray->setConstant(true); - - return PCArray; - -} - -void ModuleSanitizerCoverage::CreateFunctionLocalArrays( - Function &F, ArrayRef<BasicBlock *> AllBlocks) { - - if (Options.TracePCGuard) - FunctionGuardArray = CreateFunctionLocalArrayInSection( - AllBlocks.size(), F, Int32Ty, SanCovGuardsSectionName); - if (Options.Inline8bitCounters) - Function8bitCounterArray = CreateFunctionLocalArrayInSection( - AllBlocks.size(), F, Int8Ty, SanCovCountersSectionName); - if (Options.InlineBoolFlag) - FunctionBoolArray = CreateFunctionLocalArrayInSection( - AllBlocks.size(), F, Int1Ty, SanCovBoolFlagSectionName); - if (Options.PCTable) FunctionPCsArray = CreatePCArray(F, AllBlocks); - -} - -bool ModuleSanitizerCoverage::InjectCoverage(Function & F, - ArrayRef<BasicBlock *> AllBlocks, - bool IsLeafFunc) { - - if (AllBlocks.empty()) return false; - CreateFunctionLocalArrays(F, AllBlocks); - for (size_t i = 0, N = AllBlocks.size(); i < N; i++) { - - // afl++ START - if (BlockList.size()) { - - int skip = 0; - for (uint32_t k = 0; k < BlockList.size(); k++) { - - if (AllBlocks[i] == BlockList[k]) { - - if (debug) - fprintf(stderr, - "DEBUG: Function %s skipping BB with/after __afl_loop\n", - F.getName().str().c_str()); - skip = 1; - - } - - } - - if (skip) continue; - - } - - // afl++ END - - InjectCoverageAtBlock(F, *AllBlocks[i], i, IsLeafFunc); - - } - - return true; - -} - -// On every indirect call we call a run-time function -// __sanitizer_cov_indir_call* with two parameters: -// - callee address, -// - global cache array that contains CacheSize pointers (zero-initialized). -// The cache is used to speed up recording the caller-callee pairs. -// The address of the caller is passed implicitly via caller PC. -// CacheSize is encoded in the name of the run-time function. -void ModuleSanitizerCoverage::InjectCoverageForIndirectCalls( - Function &F, ArrayRef<Instruction *> IndirCalls) { - - if (IndirCalls.empty()) return; - assert(Options.TracePC || Options.TracePCGuard || - Options.Inline8bitCounters || Options.InlineBoolFlag); - for (auto I : IndirCalls) { - - IRBuilder<> IRB(I); - CallBase & CB = cast<CallBase>(*I); - Value * Callee = CB.getCalledOperand(); - if (isa<InlineAsm>(Callee)) continue; - IRB.CreateCall(SanCovTracePCIndir, IRB.CreatePointerCast(Callee, IntptrTy)); - - } - -} - -void ModuleSanitizerCoverage::InjectCoverageAtBlock(Function &F, BasicBlock &BB, - size_t Idx, - bool IsLeafFunc) { - - BasicBlock::iterator IP = BB.getFirstInsertionPt(); - bool IsEntryBB = &BB == &F.getEntryBlock(); - DebugLoc EntryLoc; - if (IsEntryBB) { - - if (auto SP = F.getSubprogram()) - EntryLoc = DebugLoc::get(SP->getScopeLine(), 0, SP); - // Keep static allocas and llvm.localescape calls in the entry block. Even - // if we aren't splitting the block, it's nice for allocas to be before - // calls. - IP = PrepareToSplitEntryBlock(BB, IP); - - } else { - - EntryLoc = IP->getDebugLoc(); - - } - - IRBuilder<> IRB(&*IP); - IRB.SetCurrentDebugLocation(EntryLoc); - if (Options.TracePC) { - - IRB.CreateCall(SanCovTracePC) -#if LLVM_VERSION_MAJOR < 12 - ->cannotMerge(); // gets the PC using GET_CALLER_PC. -#else - ->setCannotMerge(); // gets the PC using GET_CALLER_PC. -#endif - - } - - if (Options.TracePCGuard) { - - // afl++ START - ++afl_global_id; - - if (documentFile) { - - unsigned long long int moduleID = - (((unsigned long long int)(rand() & 0xffffffff)) << 32) | getpid(); - fprintf(documentFile, "ModuleID=%llu Function=%s edgeID=%u\n", moduleID, - F.getName().str().c_str(), afl_global_id); - - } - - /* Set the ID of the inserted basic block */ - - ConstantInt *CurLoc = ConstantInt::get(Int32Tyi, afl_global_id); - - /* Load SHM pointer */ - - Value *MapPtrIdx; - - if (map_addr) { - - MapPtrIdx = IRB.CreateGEP(MapPtrFixed, CurLoc); - - } else { - - LoadInst *MapPtr = IRB.CreateLoad(AFLMapPtr); - MapPtr->setMetadata(Mo->getMDKindID("nosanitize"), - MDNode::get(*Ct, None)); - MapPtrIdx = IRB.CreateGEP(MapPtr, CurLoc); - - } - - /* Update bitmap */ - - LoadInst *Counter = IRB.CreateLoad(MapPtrIdx); - Counter->setMetadata(Mo->getMDKindID("nosanitize"), MDNode::get(*Ct, None)); - - Value *Incr = IRB.CreateAdd(Counter, One); - - if (skip_nozero == NULL) { - - auto cf = IRB.CreateICmpEQ(Incr, Zero); - auto carry = IRB.CreateZExt(cf, Int8Tyi); - Incr = IRB.CreateAdd(Incr, carry); - - } - - IRB.CreateStore(Incr, MapPtrIdx) - ->setMetadata(Mo->getMDKindID("nosanitize"), MDNode::get(*Ct, None)); - - // done :) - - inst++; - // afl++ END - - /* - XXXXXXXXXXXXXXXXXXX - - auto GuardPtr = IRB.CreateIntToPtr( - IRB.CreateAdd(IRB.CreatePointerCast(FunctionGuardArray, IntptrTy), - ConstantInt::get(IntptrTy, Idx * 4)), - Int32PtrTy); - - IRB.CreateCall(SanCovTracePCGuard, GuardPtr)->setCannotMerge(); - */ - - } - - if (Options.Inline8bitCounters) { - - auto CounterPtr = IRB.CreateGEP( - Function8bitCounterArray->getValueType(), Function8bitCounterArray, - {ConstantInt::get(IntptrTy, 0), ConstantInt::get(IntptrTy, Idx)}); - auto Load = IRB.CreateLoad(Int8Ty, CounterPtr); - auto Inc = IRB.CreateAdd(Load, ConstantInt::get(Int8Ty, 1)); - auto Store = IRB.CreateStore(Inc, CounterPtr); - SetNoSanitizeMetadata(Load); - SetNoSanitizeMetadata(Store); - - } - - if (Options.InlineBoolFlag) { - - auto FlagPtr = IRB.CreateGEP( - FunctionBoolArray->getValueType(), FunctionBoolArray, - {ConstantInt::get(IntptrTy, 0), ConstantInt::get(IntptrTy, Idx)}); - auto Load = IRB.CreateLoad(Int1Ty, FlagPtr); - auto ThenTerm = - SplitBlockAndInsertIfThen(IRB.CreateIsNull(Load), &*IP, false); - IRBuilder<> ThenIRB(ThenTerm); - auto Store = ThenIRB.CreateStore(ConstantInt::getTrue(Int1Ty), FlagPtr); - SetNoSanitizeMetadata(Load); - SetNoSanitizeMetadata(Store); - - } - -} - -std::string ModuleSanitizerCoverage::getSectionName( - const std::string &Section) const { - - if (TargetTriple.isOSBinFormatCOFF()) { - - if (Section == SanCovCountersSectionName) return ".SCOV$CM"; - if (Section == SanCovBoolFlagSectionName) return ".SCOV$BM"; - if (Section == SanCovPCsSectionName) return ".SCOVP$M"; - return ".SCOV$GM"; // For SanCovGuardsSectionName. - - } - - if (TargetTriple.isOSBinFormatMachO()) return "__DATA,__" + Section; - return "__" + Section; - -} - -std::string ModuleSanitizerCoverage::getSectionStart( - const std::string &Section) const { - - if (TargetTriple.isOSBinFormatMachO()) - return "\1section$start$__DATA$__" + Section; - return "__start___" + Section; - -} - -std::string ModuleSanitizerCoverage::getSectionEnd( - const std::string &Section) const { - - if (TargetTriple.isOSBinFormatMachO()) - return "\1section$end$__DATA$__" + Section; - return "__stop___" + Section; - -} - -char ModuleSanitizerCoverageLegacyPass::ID = 0; - -INITIALIZE_PASS_BEGIN(ModuleSanitizerCoverageLegacyPass, "sancov", - "Pass for instrumenting coverage on functions", false, - false) -INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass) -INITIALIZE_PASS_DEPENDENCY(PostDominatorTreeWrapperPass) -INITIALIZE_PASS_END(ModuleSanitizerCoverageLegacyPass, "sancov", - "Pass for instrumenting coverage on functions", false, - false) - -ModulePass *llvm::createModuleSanitizerCoverageLegacyPassPass( - const SanitizerCoverageOptions &Options, - const std::vector<std::string> &AllowlistFiles, - const std::vector<std::string> &BlocklistFiles) { - - return new ModuleSanitizerCoverageLegacyPass(Options); - //, AllowlistFiles, BlocklistFiles); - -} - -static void registerLTOPass(const PassManagerBuilder &, - legacy::PassManagerBase &PM) { - - auto p = new ModuleSanitizerCoverageLegacyPass(); - PM.add(p); - -} - -static RegisterStandardPasses RegisterCompTransPass( - PassManagerBuilder::EP_OptimizerLast, registerLTOPass); - -static RegisterStandardPasses RegisterCompTransPass0( - PassManagerBuilder::EP_EnabledOnOptLevel0, registerLTOPass); - -#if LLVM_VERSION_MAJOR >= 11 -static RegisterStandardPasses RegisterCompTransPassLTO( - PassManagerBuilder::EP_FullLinkTimeOptimizationLast, registerLTOPass); -#endif - |