BuildID.cpp Source File (original) (raw)

21using namespace llvm;

24namespace {

27 auto findBuildID = [&Obj](const auto &ShdrOrPhdr,

28 uint64_t Alignment) -> std::optional {

30 for (auto N : Obj.notes(ShdrOrPhdr, Err))

33 return N.getDesc(Alignment);

35 return std::nullopt;

36 };

39 for (const auto &S : Sections) {

41 continue;

42 if (std::optional ShdrRes = findBuildID(S, S.sh_addralign))

43 return ShdrRes.value();

44 }

45 auto PhdrsOrErr = Obj.program_headers();

46 if (!PhdrsOrErr) {

48 return {};

49 }

50 for (const auto &P : *PhdrsOrErr) {

52 continue;

53 if (std::optional PhdrRes = findBuildID(P, P.p_align))

54 return PhdrRes.value();

55 }

56 return {};

57}

59}

62 std::string Bytes;

64 return {};

66 Bytes.size());

68}

72 return ::getBuildID(O->getELFFile());

74 return ::getBuildID(O->getELFFile());

76 return ::getBuildID(O->getELFFile());

78 return ::getBuildID(O->getELFFile());

79 return {};

80}

83 auto GetDebugPath = [&](StringRef Directory) {

88 Path += ".debug";

89 return Path;

90 };

91 if (DebugFileDirectories.empty()) {

93#if defined(__NetBSD__)

95 "/usr/libdata/debug"

96#else

98 "/usr/lib/debug"

99#endif

100 );

102 return std::string(Path);

103 } else {

104 for (const auto &Directory : DebugFileDirectories) {

105

108 return std::string(Path);

109 }

110 }

111 return std::nullopt;

112}

This file declares a library for handling Build IDs and using them to find debug info.

ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...

Lightweight error class with error context and mandatory checking.

static ErrorSuccess success()

Create a success value.

SmallString - A SmallString is just a SmallVector with methods and accessors that make it work better...

This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.

StringRef - Represent a constant reference to a string, i.e.

virtual std::optional< std::string > fetch(BuildIDRef BuildID) const

Returns the path to the debug file with the given build ID.

Definition BuildID.cpp:82

This class is the base class for all object file types.

constexpr const char * ELF_NOTE_GNU

SmallVector< uint8_t, 10 > BuildID

A build ID in binary form.

LLVM_ABI BuildIDRef getBuildID(const ObjectFile *Obj)

Returns the build ID, if any, contained in the given object file.

Definition BuildID.cpp:70

LLVM_ABI BuildID parseBuildID(StringRef Str)

Parses a build ID from a hex string.

Definition BuildID.cpp:61

ArrayRef< uint8_t > BuildIDRef

A reference to a BuildID in binary form.

LLVM_ABI bool exists(const basic_file_status &status)

Does file exist?

LLVM_ABI void append(SmallVectorImpl< char > &path, const Twine &a, const Twine &b="", const Twine &c="", const Twine &d="")

Append to path.

This is an optimization pass for GlobalISel generic memory operations.

decltype(auto) dyn_cast(const From &Val)

dyn_cast - Return the argument parameter cast to the specified type.

bool tryGetFromHex(StringRef Input, std::string &Output)

Convert hexadecimal string Input to its binary representation and store the result in Output....

void cantFail(Error Err, const char *Msg=nullptr)

Report a fatal error if Err is a failure value.

void toHex(ArrayRef< uint8_t > Input, bool LowerCase, SmallVectorImpl< char > &Output)

Convert buffer Input to its hexadecimal representation. The returned string is double the size of Inp...

void consumeError(Error Err)

Consume a Error without doing anything.