[PDB] Write public symbol records and the publics hash table

Summary:
MSVC link.exe records all external symbol names in the publics stream.
It provides similar functionality to an ELF .symtab.

Reviewers: zturner, ruiu

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D35871

llvm-svn: 309303

1 files changed, 8 insertions, 4 deletions

diff --git a/lld/COFF/Symbols.h b/lld/COFF/Symbols.h
index a10b20bf6e13..0d460d73873f 100644
--- a/lld/COFF/Symbols.h
+++ b/lld/COFF/Symbols.h
@@ -70,6 +70,10 @@ public:
   // Returns the file from which this symbol was created.
   InputFile *getFile();
 
+  // Indicates that this symbol will be included in the final image. Only valid
+  // after calling markLive.
+  bool isLive() const;
+
   Symbol *symbol();
   const Symbol *symbol() const {
     return const_cast<SymbolBody *>(this)->symbol();
@@ -155,10 +159,10 @@ public:
     return S->kind() == DefinedRegularKind;
   }
 
-  uint64_t getRVA() { return (*Data)->getRVA() + Sym->Value; }
-  bool isCOMDAT() { return IsCOMDAT; }
-  SectionChunk *getChunk() { return *Data; }
-  uint32_t getValue() { return Sym->Value; }
+  uint64_t getRVA() const { return (*Data)->getRVA() + Sym->Value; }
+  bool isCOMDAT() const { return IsCOMDAT; }
+  SectionChunk *getChunk() const { return *Data; }
+  uint32_t getValue() const { return Sym->Value; }
 
 private:
   SectionChunk **Data;