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1 //===--- unittests/CodeGen/TestAsmPrinter.cpp -------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "TestAsmPrinter.h"
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10 #include "llvm/ADT/Triple.h"
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11 #include "llvm/CodeGen/AsmPrinter.h"
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12 #include "llvm/MC/MCAsmInfo.h"
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13 #include "llvm/MC/MCContext.h"
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14 #include "llvm/Support/TargetRegistry.h"
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15 #include "llvm/Target/TargetLoweringObjectFile.h"
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16 #include "llvm/Target/TargetMachine.h"
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17
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18 using namespace llvm;
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19 using ::testing::StrictMock;
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20
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21 // Note: a non-const reference argument cannot be passed through
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22 // testing::StrictMock, thus, we pass a pointer and dereference it here.
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23 MockMCStreamer::MockMCStreamer(MCContext *Ctx) : MCStreamer(*Ctx) {}
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24
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25 MockMCStreamer::~MockMCStreamer() = default;
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26
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27 TestAsmPrinter::TestAsmPrinter() = default;
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28
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29 TestAsmPrinter::~TestAsmPrinter() = default;
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30
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31 llvm::Expected<std::unique_ptr<TestAsmPrinter>>
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32 TestAsmPrinter::create(const std::string &TripleStr, uint16_t DwarfVersion,
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33 dwarf::DwarfFormat DwarfFormat) {
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34 std::string ErrorStr;
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35 const Target *TheTarget = TargetRegistry::lookupTarget(TripleStr, ErrorStr);
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36 if (!TheTarget)
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37 return std::unique_ptr<TestAsmPrinter>();
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38
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39 std::unique_ptr<TestAsmPrinter> TestPrinter(new TestAsmPrinter);
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40 if (llvm::Error E =
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41 TestPrinter->init(TheTarget, TripleStr, DwarfVersion, DwarfFormat))
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42 return std::move(E);
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43
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44 return std::move(TestPrinter);
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45 }
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46
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47 // Note:: based on dwarfgen::Generator::init() from
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48 // llvm/unittests/DebugInfo/DWARF/DwarfGenerator.cpp
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49 llvm::Error TestAsmPrinter::init(const Target *TheTarget, StringRef TripleName,
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50 uint16_t DwarfVersion,
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51 dwarf::DwarfFormat DwarfFormat) {
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52 TM.reset(TheTarget->createTargetMachine(TripleName, "", "", TargetOptions(),
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53 None));
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54 if (!TM)
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55 return make_error<StringError>("no target machine for target " + TripleName,
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56 inconvertibleErrorCode());
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57
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58 Triple TheTriple(TripleName);
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59 MC.reset(new MCContext(TheTriple, TM->getMCAsmInfo(), TM->getMCRegisterInfo(),
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60 TM->getMCSubtargetInfo()));
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61 TM->getObjFileLowering()->Initialize(*MC, *TM);
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62 MC->setObjectFileInfo(TM->getObjFileLowering());
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63
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64 MS = new StrictMock<MockMCStreamer>(MC.get());
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65
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66 Asm.reset(
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67 TheTarget->createAsmPrinter(*TM, std::unique_ptr<MockMCStreamer>(MS)));
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68 if (!Asm)
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69 return make_error<StringError>("no asm printer for target " + TripleName,
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70 inconvertibleErrorCode());
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71
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72 // Set the DWARF version correctly on all classes that we use.
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73 MC->setDwarfVersion(DwarfVersion);
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74 Asm->setDwarfVersion(DwarfVersion);
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75
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76 // Set the DWARF format.
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77 MC->setDwarfFormat(DwarfFormat);
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78
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79 return Error::success();
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80 }
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81
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82 void TestAsmPrinter::setDwarfUsesRelocationsAcrossSections(bool Enable) {
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83 struct HackMCAsmInfo : MCAsmInfo {
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84 void setDwarfUsesRelocationsAcrossSections(bool Enable) {
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85 DwarfUsesRelocationsAcrossSections = Enable;
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86 }
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87 };
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88 static_cast<HackMCAsmInfo *>(const_cast<MCAsmInfo *>(TM->getMCAsmInfo()))
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89 ->setDwarfUsesRelocationsAcrossSections(Enable);
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90 }
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