llvm-pdbdump: Fix several smaller issues with injected source compression handling

[thakis]

Summary

• getCompression() used to return a PDB_SourceCompression even though the docs for IDiaInjectedSource are explicit about the return value being compiler-dependent. Return an uint32_t instead, and make the printing code handle unknown values better by printing "Unknown" and the int value instead of not printing any compression.

• Print compressed contents as hex dump, not as string.

• Add compression type "DotNet", which is used (at least) by csc.exe, the C# compiler. Also add a lengthy comment describing the stream contents (derived from looking at the raw hex contents long enough to see the GUIDs, which led me to the roslyn and mono implementations for handling this).

• The native injected source dumper was dumping the contents of the whole data stream -- but csc.exe writes a stream that's padded with zero bytes to the next 512 boundary, and the dia api doesn't display those padding bytes. So make NativeInjectedSource::getCode() do the same thing.

[rnk]

lgtm with a suggestion

llvm/lib/DebugInfo/PDB/Native/NativeEnumInjectedSources.cpp

20

Perhaps Limit should be uint32_t since PDBs have some inherent 32-bit size limitations, and this is PDB-specific code? It would avoid the casts for std::min.

[thakis]

Thanks!

llvm/lib/DebugInfo/PDB/Native/NativeEnumInjectedSources.cpp

20

You're completely right. I had done this because IPDBInjectedSource::getCodeByteSize() returns 64-bit, but Entry.FileSize is just 32 bits.

getCodeByteSize() returns 64 bit because that's what the DIA version returns: https://docs.microsoft.com/en-us/visualstudio/debugger/debug-interface-access/idiainjectedsource-get-length?view=vs-2019

But it also says "the same value as returned by the IDiaInjectedSource::get_source method" and that returns a DWORD. Weird that dia returns 64-bit. Anyhow, changed just this function here to take a uint32_t, and I'm now passing in Entry.FileSize.

llvm/include/llvm/DebugInfo/PDB/IPDBInjectedSource.h

 public:
   virtual ~IPDBInjectedSource();
 
   virtual uint32_t getCrc32() const = 0;
   virtual uint64_t getCodeByteSize() const = 0;
   virtual std::string getFileName() const = 0;
   virtual std::string getObjectFileName() const = 0;
   virtual std::string getVirtualFileName() const = 0;
-  virtual PDB_SourceCompression getCompression() const = 0;
+  // The enum PDB_SourceCompression lists known return values.
+  // The returned value depends on the PDB producer, but 0 is guaranteed
+  // to mean "no compression".
+  virtual uint32_t getCompression() const = 0;
   virtual std::string getCode() const = 0;
 };
 } // namespace pdb
 } // namespace llvm
 
 #endif // LLVM_DEBUGINFO_PDB_IPDBINJECTEDSOURCE_H

llvm/include/llvm/DebugInfo/PDB/PDBExtras.h

 raw_ostream &operator<<(raw_ostream &OS, const PDB_LocType &Loc);
 raw_ostream &operator<<(raw_ostream &OS, const codeview::ThunkOrdinal &Thunk);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_Checksum &Checksum);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_Lang &Lang);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_SymType &Tag);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_MemberAccess &Access);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_UdtType &Type);
 raw_ostream &operator<<(raw_ostream &OS, const PDB_Machine &Machine);
-raw_ostream &operator<<(raw_ostream &OS,
-                        const PDB_SourceCompression &Compression);
 
 raw_ostream &operator<<(raw_ostream &OS, const Variant &Value);
 raw_ostream &operator<<(raw_ostream &OS, const VersionInfo &Version);
 raw_ostream &operator<<(raw_ostream &OS, const TagStats &Stats);
 
+raw_ostream& dumpPDBSourceCompression(raw_ostream& OS, uint32_t Compression);
 
 template <typename T>
 void dumpSymbolField(raw_ostream &OS, StringRef Name, T Value, int Indent) {
   OS << "\n";
   OS.indent(Indent);
   OS << Name << ": " << Value;
 }
 
 
 } // end namespace pdb
 
 } // end namespace llvm
 
 #endif // LLVM_DEBUGINFO_PDB_PDBEXTRAS_H

llvm/include/llvm/DebugInfo/PDB/PDBTypes.h

enum class PDB_Machine {
   SH3 = 0x1A2,
   SH3DSP = 0x1A3,
   SH4 = 0x1A6,
   SH5 = 0x1A8,
   Thumb = 0x1C2,
   WceMipsV2 = 0x169
 };
 
-enum class PDB_SourceCompression {
+// A struct with an inner unnamed enum with explicit underlying type resuls
+// in an enum class that can implicitly convert to the underlying type, which
+// is convenient for this enum.
+struct PDB_SourceCompression {
+  enum : uint32_t {
+    // No compression. Produced e.g. by `link.exe /natvis:foo.natvis`.
     None,
+    // Not known what produces this.
     RunLengthEncoded,
+    // Not known what produces this.
     Huffman,
+    // Not known what produces this.
     LZ,
+    // Produced e.g. by `csc /debug`. The encoded data is its own mini-stream
+    // with the following layout (in little endian):
+    //   GUID LanguageTypeGuid;
+    //   GUID LanguageVendorGuid;
+    //   GUID DocumentTypeGuid;
+    //   GUID HashFunctionGuid;
+    //   uint32_t HashDataSize;
+    //   uint32_t CompressedDataSize;
+    // Followed by HashDataSize bytes containing a hash checksum,
+    // followed by CompressedDataSize bytes containing source contents.
+    //
+    // CompressedDataSize can be 0, in this case only the hash data is present.
+    // (CompressedDataSize is != 0 e.g. if `/embed` is passed to csc.exe.)
+    // The compressed data format is:
+    //   uint32_t UncompressedDataSize;
+    // If UncompressedDataSize is 0, the data is stored uncompressed and
+    // CompressedDataSize stores the uncompressed size.
+    // If UncompressedDataSize is != 0, then the data is in raw deflate
+    // encoding as described in rfc1951.
+    //
+    // A GUID is 16 bytes, stored in the usual
+    //   uint32_t
+    //   uint16_t
+    //   uint16_t
+    //   uint8_t[24]
+    // layout.
+    //
+    // Well-known GUIDs for LanguageTypeGuid are:
+    //   63a08714-fc37-11d2-904c-00c04fa302a1 C
+    //   3a12d0b7-c26c-11d0-b442-00a0244a1dd2 C++
+    //   3f5162f8-07c6-11d3-9053-00c04fa302a1 C#
+    //   af046cd1-d0e1-11d2-977c-00a0c9b4d50c Cobol
+    //   ab4f38c9-b6e6-43ba-be3b-58080b2ccce3 F#
+    //   3a12d0b4-c26c-11d0-b442-00a0244a1dd2 Java
+    //   3a12d0b6-c26c-11d0-b442-00a0244a1dd2 JScript
+    //   af046cd2-d0e1-11d2-977c-00a0c9b4d50c Pascal
+    //   3a12d0b8-c26c-11d0-b442-00a0244a1dd2 Visual Basic
+    //
+    // Well-known GUIDs for LanguageVendorGuid are:
+    //   994b45c4-e6e9-11d2-903f-00c04fa302a1 Microsoft
+    //
+    // Well-known GUIDs for DocumentTypeGuid are:
+    //   5a869d0b-6611-11d3-bd2a-0000f80849bd Text
+    //
+    // Well-known GUIDs for HashFunctionGuid are:
+    //   406ea660-64cf-4c82-b6f0-42d48172a799 MD5    (HashDataSize is 16)
+    //   ff1816ec-aa5e-4d10-87f7-6f4963833460 SHA1   (HashDataSize is 20)
+    //   8829d00f-11b8-4213-878b-770e8597ac16 SHA256 (HashDataSize is 32)
+    DotNet = 101,
+  };
 };
 
 /// These values correspond to the CV_call_e enumeration, and are documented
 /// at the following locations:
 ///   https://msdn.microsoft.com/en-us/library/b2fc64ek.aspx
 ///   https://msdn.microsoft.com/en-us/library/windows/desktop/ms680207(v=vs.85).aspx
 using PDB_CallingConv = codeview::CallingConvention;
 

llvm/lib/DebugInfo/PDB/Native/NativeEnumInjectedSources.cpp

 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
 #include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
 
 namespace llvm {
 namespace pdb {
 
 namespace {
 
-Expected<std::string> readStreamData(BinaryStream &Stream) {
-  uint32_t Offset = 0, DataLength = Stream.getLength();
+Expected<std::string> readStreamData(BinaryStream &Stream, uint64_t Limit) {
+  uint32_t Offset = 0;
+  // Cast to uint32_t is safe because getLength() returns a uint32_t.
+  uint32_t DataLength = static_cast<uint32_t>(
+      std::min(Limit, static_cast<uint64_t>(Stream.getLength())));
   std::string Result;
   Result.reserve(DataLength);
   while (Offset < DataLength) {
     ArrayRef<uint8_t> Data;
     if (auto E = Stream.readLongestContiguousChunk(Offset, Data))
       return std::move(E);
+    Data = Data.take_front(DataLength - Offset);
     Offset += Data.size();
     Result += toStringRef(Data);
   }
   return Result;
 }
 
 class NativeInjectedSource final : public IPDBInjectedSource {
   const SrcHeaderBlockEntry &Entry;
public:
   }
 
   std::string getVirtualFileName() const override {
     auto VName = Strings.getStringForID(Entry.VFileNI);
     assert(VName && "InjectedSourceStream should have rejected this");
     return *VName;
   }
 
-  PDB_SourceCompression getCompression() const override {
-    return static_cast<PDB_SourceCompression>(Entry.Compression);
-  }
+  uint32_t getCompression() const override { return Entry.Compression; }
 
   std::string getCode() const override {
     // Get name of stream storing the data.
     auto VName = Strings.getStringForID(Entry.VFileNI);
     assert(VName && "InjectedSourceStream should have rejected this");
     std::string StreamName = ("/src/files/" + *VName).str();
 
     // Find stream with that name and read its data.
     // FIXME: Consider validating (or even loading) all this in
     // InjectedSourceStream so that no error can happen here.
     auto ExpectedFileStream = File.safelyCreateNamedStream(StreamName);
     if (!ExpectedFileStream) {
       consumeError(ExpectedFileStream.takeError());
       return "(failed to open data stream)";
     }
 
-    auto Data = readStreamData(**ExpectedFileStream);
+    auto Data = readStreamData(**ExpectedFileStream, getCodeByteSize());
     if (!Data) {
       consumeError(Data.takeError());
       return "(failed to read data)";
     }
     return *Data;
   }
 };
 

llvm/lib/DebugInfo/PDB/PDBExtras.cpp

switch (Machine) {
     CASE_OUTPUT_ENUM_CLASS_NAME(PDB_Machine, Thumb, OS)
     CASE_OUTPUT_ENUM_CLASS_NAME(PDB_Machine, WceMipsV2, OS)
   default:
     OS << "Unknown";
   }
   return OS;
 }
 
-raw_ostream &llvm::pdb::operator<<(raw_ostream &OS,
-                                   const PDB_SourceCompression &Compression) {
+raw_ostream &llvm::pdb::dumpPDBSourceCompression(raw_ostream &OS,
+                                                 uint32_t Compression) {
   switch (Compression) {
     CASE_OUTPUT_ENUM_CLASS_NAME(PDB_SourceCompression, None, OS)
     CASE_OUTPUT_ENUM_CLASS_NAME(PDB_SourceCompression, Huffman, OS)
     CASE_OUTPUT_ENUM_CLASS_NAME(PDB_SourceCompression, LZ, OS)
     CASE_OUTPUT_ENUM_CLASS_STR(PDB_SourceCompression, RunLengthEncoded, "RLE",
                                OS)
+    CASE_OUTPUT_ENUM_CLASS_NAME(PDB_SourceCompression, DotNet, OS)
+  default:
+    OS << "Unknown (" << Compression << ")";
   }
   return OS;
 }
 
 raw_ostream &llvm::pdb::operator<<(raw_ostream &OS, const Variant &Value) {
   switch (Value.Type) {
     case PDB_VariantType::Bool:
       OS << (Value.Value.Bool ? "true" : "false");

llvm/test/tools/llvm-pdbutil/injected-sources-native.test

 ; CHECK-NEXT: </Type>
 ; CHECK-NEXT: <Type Name="Buzz">
 ; CHECK-NEXT:   <DisplayString>Fourth test</DisplayString>
 ; CHECK-NEXT: </Type>
 ; CHECK-NEXT: </AutoVisualizer>
 
 ; NEGATIVE:      ---INJECTED SOURCES---
 ; NEGATIVE-NEXT: There are no injected sources.
+
+; PDB created by running `csc /debug Hello.cs`
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_hashonly.pdb | FileCheck --check-prefix=HASH %s
+
+; HASH:      ---INJECTED SOURCES---
+; HASH:      C:\src\llvm-mono\Hello.cs (92 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=269413292, compression=DotNet
+; HASH-NEXT: Compressed data (
+; HASH-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; HASH-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; HASH-NEXT:   0040: 14000000 00000000 17299CBE 74FDDF66 FFCD5E08 CE34A775 D464C611           |.........)..t..f..^..4.u.d..|
+; HASH-NEXT: )
+
+; PDB created by running `csc /debug Hello.cs` with Hello.cs smaller than 200 bytes.
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_contents_uncompressed.pdb | FileCheck --check-prefix=UNCOMP %s
+
+; UNCOMP:      ---INJECTED SOURCES---
+; UNCOMP:      C:\src\llvm-mono\Hello.cs (232 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=323787205, compression=DotNet
+; UNCOMP-NEXT: Compressed data (
+; UNCOMP-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; UNCOMP-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; UNCOMP-NEXT:   0040: 14000000 8C000000 17299CBE 74FDDF66 FFCD5E08 CE34A775 D464C611 00000000  |.........)..t..f..^..4.u.d......|
+; UNCOMP-NEXT:   0060: 6E616D65 73706163 65204865 6C6C6F57 6F726C64 207B0D0A 636C6173 73204865  |namespace HelloWorld {..class He|
+; UNCOMP-NEXT:   0080: 6C6C6F20 7B0D0A20 20737461 74696320 766F6964 204D6169 6E282920 7B205379  |llo {..  static void Main() { Sy|
+; UNCOMP-NEXT:   00A0: 7374656D 2E436F6E 736F6C65 2E577269 74654C69 6E652822 48656C6C 6F206173  |stem.Console.WriteLine("Hello as|
+; UNCOMP-NEXT:   00C0: 64666A6B 6C777763 6F697762 72796669 75667566 20576F72 6C642122 293B207D  |dfjklwwcoiwbryfiufuf World!"); }|
+; UNCOMP-NEXT:   00E0: 0D0A7D0D 0A7D0D0A                                                        |..}..}..|
+; UNCOMP-NEXT: )
+
+; PDB created by running `csc /debug Hello.cs` with Hello.cs larger than 200 bytes.
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_contents_compressed.pdb | FileCheck --check-prefix=COMP %s
+
+; COMP:      ---INJECTED SOURCES---
+; COMP:      C:\src\llvm-mono\Hello.cs (218 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=616104201, compression=DotNet
+; COMP-NEXT: Compressed data (
+; COMP-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; COMP-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; COMP-NEXT:   0040: 14000000 7E000000 52CD36A0 6A9824CD A3034543 7FA9765E D572DA21 FB000000  |....~...R.6.j.$...EC..v^.r.!....|
+; COMP-NEXT:   0060: CB4BCC4D 2D2E484C 4E55F048 CDC9C90F CF2FCA49 51A8E6E5 4ACE492C 2E868881  |.K.M-.HLNU.H...../.IQ...J.I,....|
+; COMP-NEXT:   0080: B80A0AC5 25892599 C90A65F9 99290ABE 8999791A 9A0AD50A C195C525 A9B97ACE  |....%.%...e..)....y........%..z.|
+; COMP-NEXT:   00A0: F979C5F9 39A97AE1 459925A9 3E9979A9 1A4A109D 89C52969 59D939E5 E5C9F999  |.y..9.z.E.%.>.y..J....)iY.9.....|
+; COMP-NEXT:   00C0: E5494595 6999A569 A5690321 0CF698A2 92A6B542 2D2F1704 0100               |.IE.i..i.i.!.......B-/....|
+; COMP-NEXT: )

llvm/test/tools/llvm-pdbutil/injected-sources.test

 ; CHECK-NEXT: </Type>
 ; CHECK-NEXT: <Type Name="Buzz">
 ; CHECK-NEXT:   <DisplayString>Fourth test</DisplayString>
 ; CHECK-NEXT: </Type>
 ; CHECK-NEXT: </AutoVisualizer>
 
 ; NEGATIVE:      ---INJECTED SOURCES---
 ; NEGATIVE-NEXT: There are no injected sources.
+
+; PDB created by running `csc /debug Hello.cs`
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_hashonly.pdb | FileCheck --check-prefix=HASH %s
+
+; HASH:      ---INJECTED SOURCES---
+; HASH:      C:\src\llvm-mono\Hello.cs (92 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=269413292, compression=DotNet
+; HASH-NEXT: Compressed data (
+; HASH-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; HASH-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; HASH-NEXT:   0040: 14000000 00000000 17299CBE 74FDDF66 FFCD5E08 CE34A775 D464C611           |.........)..t..f..^..4.u.d..|
+; HASH-NEXT: )
+
+; PDB created by running `csc /debug Hello.cs` with Hello.cs smaller than 200 bytes.
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_contents_uncompressed.pdb | FileCheck --check-prefix=UNCOMP %s
+
+; UNCOMP:      ---INJECTED SOURCES---
+; UNCOMP:      C:\src\llvm-mono\Hello.cs (232 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=323787205, compression=DotNet
+; UNCOMP-NEXT: Compressed data (
+; UNCOMP-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; UNCOMP-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; UNCOMP-NEXT:   0040: 14000000 8C000000 17299CBE 74FDDF66 FFCD5E08 CE34A775 D464C611 00000000  |.........)..t..f..^..4.u.d......|
+; UNCOMP-NEXT:   0060: 6E616D65 73706163 65204865 6C6C6F57 6F726C64 207B0D0A 636C6173 73204865  |namespace HelloWorld {..class He|
+; UNCOMP-NEXT:   0080: 6C6C6F20 7B0D0A20 20737461 74696320 766F6964 204D6169 6E282920 7B205379  |llo {..  static void Main() { Sy|
+; UNCOMP-NEXT:   00A0: 7374656D 2E436F6E 736F6C65 2E577269 74654C69 6E652822 48656C6C 6F206173  |stem.Console.WriteLine("Hello as|
+; UNCOMP-NEXT:   00C0: 64666A6B 6C777763 6F697762 72796669 75667566 20576F72 6C642122 293B207D  |dfjklwwcoiwbryfiufuf World!"); }|
+; UNCOMP-NEXT:   00E0: 0D0A7D0D 0A7D0D0A                                                        |..}..}..|
+; UNCOMP-NEXT: )
+
+; PDB created by running `csc /debug Hello.cs` with Hello.cs larger than 200 bytes.
+; RUN: llvm-pdbutil pretty -native -injected-sources -injected-source-content \
+; RUN:   %p/Inputs/dotnet_contents_compressed.pdb | FileCheck --check-prefix=COMP %s
+
+; COMP:      ---INJECTED SOURCES---
+; COMP:      C:\src\llvm-mono\Hello.cs (218 bytes): obj=<null>, vname=c:\src\llvm-mono\hello.cs, crc=616104201, compression=DotNet
+; COMP-NEXT: Compressed data (
+; COMP-NEXT:   0000: F862513F C607D311 905300C0 4FA302A1 C4454B99 E9E6D211 903F00C0 4FA302A1  |.bQ?.....S..O....EK......?..O...|
+; COMP-NEXT:   0020: 0B9D865A 1166D311 BD2A0000 F80849BD EC1618FF 5EAA104D 87F76F49 63833460  |...Z.f...*....I.....^..M..oIc.4`|
+; COMP-NEXT:   0040: 14000000 7E000000 52CD36A0 6A9824CD A3034543 7FA9765E D572DA21 FB000000  |....~...R.6.j.$...EC..v^.r.!....|
+; COMP-NEXT:   0060: CB4BCC4D 2D2E484C 4E55F048 CDC9C90F CF2FCA49 51A8E6E5 4ACE492C 2E868881  |.K.M-.HLNU.H...../.IQ...J.I,....|
+; COMP-NEXT:   0080: B80A0AC5 25892599 C90A65F9 99290ABE 8999791A 9A0AD50A C195C525 A9B97ACE  |....%.%...e..)....y........%..z.|
+; COMP-NEXT:   00A0: F979C5F9 39A97AE1 459925A9 3E9979A9 1A4A109D 89C52969 59D939E5 E5C9F999  |.y..9.z.E.%.>.y..J....)iY.9.....|
+; COMP-NEXT:   00C0: E5494595 6999A569 A5690321 0CF698A2 92A6B542 2D2F1704 0100               |.IE.i..i.i.!.......B-/....|
+; COMP-NEXT: )

llvm/tools/llvm-pdbutil/LinePrinter.h

struct AutoIndent {
   }
 
   LinePrinter *L = nullptr;
   uint32_t Amount = 0;
 };
 
 template <class T>
 inline raw_ostream &operator<<(LinePrinter &Printer, const T &Item) {
-  Printer.getStream() << Item;
-  return Printer.getStream();
+  return Printer.getStream() << Item;
 }
 
 enum class PDB_ColorItem {
   None,
   Address,
   Type,
   Comment,
   Padding,

llvm/tools/llvm-pdbutil/llvm-pdbutil.cpp

static void dumpInjectedSources(LinePrinter &Printer, IPDBSession &Session) {
   while (auto IS = Sources->getNext()) {
     Printer.NewLine();
     std::string File = stringOr(IS->getFileName(), "<null>");
     uint64_t Size = IS->getCodeByteSize();
     std::string Obj = stringOr(IS->getObjectFileName(), "<null>");
     std::string VFName = stringOr(IS->getVirtualFileName(), "<null>");
     uint32_t CRC = IS->getCrc32();
 
-    std::string CompressionStr;
-    llvm::raw_string_ostream Stream(CompressionStr);
-    Stream << IS->getCompression();
     WithColor(Printer, PDB_ColorItem::Path).get() << File;
     Printer << " (";
     WithColor(Printer, PDB_ColorItem::LiteralValue).get() << Size;
     Printer << " bytes): ";
     WithColor(Printer, PDB_ColorItem::Keyword).get() << "obj";
     Printer << "=";
     WithColor(Printer, PDB_ColorItem::Path).get() << Obj;
     Printer << ", ";
     WithColor(Printer, PDB_ColorItem::Keyword).get() << "vname";
     Printer << "=";
     WithColor(Printer, PDB_ColorItem::Path).get() << VFName;
     Printer << ", ";
     WithColor(Printer, PDB_ColorItem::Keyword).get() << "crc";
     Printer << "=";
     WithColor(Printer, PDB_ColorItem::LiteralValue).get() << CRC;
     Printer << ", ";
     WithColor(Printer, PDB_ColorItem::Keyword).get() << "compression";
     Printer << "=";
-    WithColor(Printer, PDB_ColorItem::LiteralValue).get() << Stream.str();
+    dumpPDBSourceCompression(
+        WithColor(Printer, PDB_ColorItem::LiteralValue).get(),
+        IS->getCompression());
 
     if (!opts::pretty::ShowInjectedSourceContent)
       continue;
 
     // Set the indent level to 0 when printing file content.
     int Indent = Printer.getIndentLevel();
     Printer.Unindent(Indent);
 
+    if (IS->getCompression() == PDB_SourceCompression::None)
       Printer.printLine(IS->getCode());
+    else
+      Printer.formatBinary("Compressed data",
+                           arrayRefFromStringRef(IS->getCode()),
+                           /*StartOffset=*/0);
 
     // Re-indent back to the original level.
     Printer.Indent(Indent);
   }
 }
 
 template <typename OuterT, typename ChildT>
 void diaDumpChildren(PDBSymbol &Outer, PdbSymbolIdField Ids,