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[CodeView] Minimal support for S_UNAMESPACE records

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Differential Revision: https://reviews.llvm.org/D50007

llvm-svn: 338417
This commit is contained in:
Alexandre Ganea 2018-07-31 19:15:50 +00:00
parent 632df24ca9
commit 0f20d5d6a0
10 changed files with 102 additions and 3 deletions
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2
include/llvm/DebugInfo/CodeView/CodeViewSymbols.def
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@ -143,7 +143,6 @@ CV_SYMBOL(S_MANSLOT , 0x1120)
CV_SYMBOL(S_MANMANYREG , 0x1121)
CV_SYMBOL(S_MANREGREL , 0x1122)
CV_SYMBOL(S_MANMANYREG2 , 0x1123)
CV_SYMBOL(S_UNAMESPACE , 0x1124)
CV_SYMBOL(S_DATAREF , 0x1126)
CV_SYMBOL(S_ANNOTATIONREF , 0x1128)
CV_SYMBOL(S_TOKENREF , 0x1129)
@ -255,6 +254,7 @@ SYMBOL_RECORD_ALIAS(S_GMANDATA , 0x111d, ManagedGlobalData, DataSym)
SYMBOL_RECORD(S_LTHREAD32 , 0x1112, ThreadLocalDataSym)
SYMBOL_RECORD_ALIAS(S_GTHREAD32 , 0x1113, GlobalTLS, ThreadLocalDataSym)
SYMBOL_RECORD(S_UNAMESPACE , 0x1124, UsingNamespaceSym)
#undef CV_SYMBOL
#undef SYMBOL_RECORD

13
include/llvm/DebugInfo/CodeView/SymbolRecord.h
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@ -942,6 +942,19 @@ public:
uint32_t RecordOffset;
};
// S_UNAMESPACE
class UsingNamespaceSym : public SymbolRecord {
public:
explicit UsingNamespaceSym(SymbolRecordKind Kind) : SymbolRecord(Kind) {}
explicit UsingNamespaceSym(uint32_t RecordOffset)
: SymbolRecord(SymbolRecordKind::RegRelativeSym),
RecordOffset(RecordOffset) {}
StringRef Name;
uint32_t RecordOffset;
};
// S_ANNOTATION
using CVSymbol = CVRecord<SymbolKind>;

3
lib/DebugInfo/CodeView/RecordName.cpp
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@ -307,6 +307,9 @@ static int getSymbolNameOffset(CVSymbol Sym) {
// See BPRelativeSym
case SymbolKind::S_BPREL32:
return 8;
// See UsingNamespaceSym
case SymbolKind::S_UNAMESPACE:
return 0;
default:
return -1;
}

6
lib/DebugInfo/CodeView/SymbolDumper.cpp
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@ -611,6 +611,12 @@ Error CVSymbolDumperImpl::visitKnownRecord(CVSymbol &CVR, UDTSym &UDT) {
return Error::success();
}
Error CVSymbolDumperImpl::visitKnownRecord(CVSymbol &CVR,
UsingNamespaceSym &UN) {
W.printString("Namespace", UN.Name);
return Error::success();
}
Error CVSymbolDumperImpl::visitUnknownSymbol(CVSymbol &CVR) {
W.printNumber("Length", CVR.length());
return Error::success();

8
lib/DebugInfo/CodeView/SymbolRecordMapping.cpp
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@ -463,3 +463,11 @@ Error SymbolRecordMapping::visitKnownRecord(CVSymbol &CVR, UDTSym &UDT) {
return Error::success();
}
Error SymbolRecordMapping::visitKnownRecord(CVSymbol &CVR,
UsingNamespaceSym &UN) {
error(IO.mapStringZ(UN.Name));
return Error::success();
}

3
lib/DebugInfo/CodeView/TypeIndexDiscovery.cpp
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@ -428,7 +428,7 @@ static bool discoverTypeIndices(ArrayRef<uint8_t> Content, SymbolKind Kind,
case SymbolKind::S_DEFRANGE_SUBFIELD:
break;
// No type refernces.
// No type references.
case SymbolKind::S_LABEL32:
case SymbolKind::S_OBJNAME:
case SymbolKind::S_COMPILE:
@ -439,6 +439,7 @@ static bool discoverTypeIndices(ArrayRef<uint8_t> Content, SymbolKind Kind,
case SymbolKind::S_FRAMEPROC:
case SymbolKind::S_THUNK32:
case SymbolKind::S_FRAMECOOKIE:
case SymbolKind::S_UNAMESPACE:
break;
// Scope ending symbols.
case SymbolKind::S_END:

4
lib/ObjectYAML/CodeViewYAMLSymbols.cpp
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@ -550,6 +550,10 @@ template <> void SymbolRecordImpl<ThreadLocalDataSym>::map(IO &IO) {
IO.mapRequired("DisplayName", Symbol.Name);
}
template <> void SymbolRecordImpl<UsingNamespaceSym>::map(IO &IO) {
IO.mapRequired("Namespace", Symbol.Name);
}
} // end namespace detail
} // end namespace CodeViewYAML
} // end namespace llvm

51
test/DebugInfo/PDB/using-namespace.test Normal file
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@ -0,0 +1,51 @@
# RUN: yaml2obj < %s > %t.obj
# RUN: llvm-readobj -codeview %t.obj | FileCheck %s
# CHECK: Kind: S_UNAMESPACE (0x1124)
# CHECK-NEXT: Namespace: __vc_attributes
--- !COFF
header:
Machine: IMAGE_FILE_MACHINE_AMD64
Characteristics: [ ]
sections:
- Name: '.debug$S'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
Subsections:
- !Symbols
Records:
- Kind: S_OBJNAME
ObjNameSym:
Signature: 0
ObjectName: 'SimpleFunction.obj'
- Kind: S_COMPILE3
Compile3Sym:
Flags: [ SecurityChecks, HotPatch ]
Machine: X64
FrontendMajor: 19
FrontendMinor: 14
FrontendBuild: 26433
FrontendQFE: 0
BackendMajor: 19
BackendMinor: 14
BackendBuild: 26433
BackendQFE: 0
Version: 'Microsoft (R) Optimizing Compiler'
- Kind: S_UNAMESPACE
UsingNamespaceSym:
Namespace: __vc_attributes
- Kind: S_UNAMESPACE
UsingNamespaceSym:
Namespace: helper_attributes
- Kind: S_UNAMESPACE
UsingNamespaceSym:
Namespace: atl
- Kind: S_UNAMESPACE
UsingNamespaceSym:
Namespace: std
- !StringTable
Strings:
- 'SimpleFunction.c'
symbols:
...

6
tools/llvm-pdbutil/MinimalSymbolDumper.cpp
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@ -760,3 +760,9 @@ Error MinimalSymbolDumper::visitKnownRecord(CVSymbol &CVR, UDTSym &UDT) {
P.formatLine("original type = {0}", UDT.Type);
return Error::success();
}
Error MinimalSymbolDumper::visitKnownRecord(CVSymbol &CVR,
UsingNamespaceSym &UN) {
P.format(" `{0}`", UN.Name);
return Error::success();
}

7
unittests/DebugInfo/CodeView/TypeIndexDiscoveryTest.cpp
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@ -601,3 +601,10 @@ TEST_F(TypeIndexIteratorTest, VariableSizeIntegers) {
writeFieldList(BaseClass1, BaseClass2);
checkTypeReferences(0, TypeIndex(47), TypeIndex(48));
}
TEST_F(TypeIndexIteratorTest, UsingNamespace) {
UsingNamespaceSym UN(SymbolRecordKind::UsingNamespaceSym);
UN.Name = "std";
writeSymbolRecords(UN);
checkTypeReferences(0);
}