bolt/unittests/Core/BinaryContext.cpp

   1 #include "bolt/Core/BinaryContext.h"
   2 #include "llvm/BinaryFormat/ELF.h"
   3 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
   4 #include "llvm/Object/ELFObjectFile.h"
   5 #include "llvm/Support/TargetSelect.h"
   6 #include "gtest/gtest.h"
   7
   8 using namespace llvm;
   9 using namespace llvm::object;
  10 using namespace llvm::ELF;
  11 using namespace bolt;
  12
  13 namespace {
  14 struct BinaryContextTester : public testing::TestWithParam<Triple::ArchType> {
  15   void SetUp() override {
  16     initalizeLLVM();
  17     prepareElf();
  18     initializeBOLT();
  19   }
  20
  21 protected:
  22   void initalizeLLVM() {
  23     llvm::InitializeAllTargetInfos();
  24     llvm::InitializeAllTargetMCs();
  25     llvm::InitializeAllAsmParsers();
  26     llvm::InitializeAllDisassemblers();
  27     llvm::InitializeAllTargets();
  28     llvm::InitializeAllAsmPrinters();
  29   }
  30
  31   void prepareElf() {
  32     memcpy(ElfBuf, "\177ELF", 4);
  33     ELF64LE::Ehdr *EHdr = reinterpret_cast<typename ELF64LE::Ehdr *>(ElfBuf);
  34     EHdr->e_ident[llvm::ELF::EI_CLASS] = llvm::ELF::ELFCLASS64;
  35     EHdr->e_ident[llvm::ELF::EI_DATA] = llvm::ELF::ELFDATA2LSB;
  36     EHdr->e_machine = GetParam() == Triple::aarch64 ? EM_AARCH64 : EM_X86_64;
  37     MemoryBufferRef Source(StringRef(ElfBuf, sizeof(ElfBuf)), "ELF");
  38     ObjFile = cantFail(ObjectFile::createObjectFile(Source));
  39   }
  40
  41   void initializeBOLT() {
  42     BC = cantFail(BinaryContext::createBinaryContext(
  43         ObjFile.get(), true, DWARFContext::create(*ObjFile.get())));
  44     ASSERT_FALSE(!BC);
  45   }
  46
  47   char ElfBuf[sizeof(typename ELF64LE::Ehdr)] = {};
  48   std::unique_ptr<ObjectFile> ObjFile;
  49   std::unique_ptr<BinaryContext> BC;
  50 };
  51 } // namespace
  52
  53 #ifdef X86_AVAILABLE
  54
  55 INSTANTIATE_TEST_SUITE_P(X86, BinaryContextTester,
  56                          ::testing::Values(Triple::x86_64));
  57
  58 #endif
  59
  60 #ifdef AARCH64_AVAILABLE
  61
  62 INSTANTIATE_TEST_SUITE_P(AArch64, BinaryContextTester,
  63                          ::testing::Values(Triple::aarch64));
  64
  65 #endif
  66
  67 TEST_P(BinaryContextTester, BaseAddress) {
  68   // Check that  base address calculation is correct for a binary with the
  69   // following segment layout:
  70   BC->SegmentMapInfo[0] = SegmentInfo{0, 0x10e8c2b4, 0, 0x10e8c2b4, 0x1000};
  71   BC->SegmentMapInfo[0x10e8d2b4] =
  72       SegmentInfo{0x10e8d2b4, 0x3952faec, 0x10e8c2b4, 0x3952faec, 0x1000};
  73   BC->SegmentMapInfo[0x4a3bddc0] =
  74       SegmentInfo{0x4a3bddc0, 0x148e828, 0x4a3bbdc0, 0x148e828, 0x1000};
  75   BC->SegmentMapInfo[0x4b84d5e8] =
  76       SegmentInfo{0x4b84d5e8, 0x294f830, 0x4b84a5e8, 0x3d3820, 0x1000};
  77
  78   std::optional<uint64_t> BaseAddress =
  79       BC->getBaseAddressForMapping(0x7f13f5556000, 0x10e8c000);
  80   ASSERT_TRUE(BaseAddress.has_value());
  81   ASSERT_EQ(*BaseAddress, 0x7f13e46c9000ULL);
  82
  83   BaseAddress = BC->getBaseAddressForMapping(0x7f13f5556000, 0x137a000);
  84   ASSERT_FALSE(BaseAddress.has_value());
  85 }