[NativePDB] Reconstruct function declarations from debug info.

Previously we would create an lldb::Function object for each function
parsed, but we would not add these to the clang AST. This is a first
step towards getting local variable support working, as we first need an
AST decl so that when we create local variable entries, they have the
proper DeclContext.

Differential Revision: https://reviews.llvm.org/D55384

llvm-svn: 348631

1 files changed, 12 insertions, 1 deletions

diff --git a/llvm/lib/DebugInfo/CodeView/SymbolRecordHelpers.cpp b/llvm/lib/DebugInfo/CodeView/SymbolRecordHelpers.cpp
index f44fc8f01df..79f39591929 100644
--- a/llvm/lib/DebugInfo/CodeView/SymbolRecordHelpers.cpp
+++ b/llvm/lib/DebugInfo/CodeView/SymbolRecordHelpers.cpp
@@ -50,4 +50,15 @@ llvm::codeview::getScopeEndOffset(const llvm::codeview::CVSymbol &Sym) {
     assert(false && "Unknown record type");
     return 0;
   }
-}
\ No newline at end of file
+}
+
+CVSymbolArray
+llvm::codeview::limitSymbolArrayToScope(const CVSymbolArray &Symbols,
+                                        uint32_t ScopeBegin) {
+  CVSymbol Opener = *Symbols.at(ScopeBegin);
+  assert(symbolOpensScope(Opener.kind()));
+  uint32_t EndOffset = getScopeEndOffset(Opener);
+  CVSymbol Closer = *Symbols.at(EndOffset);
+  EndOffset += Closer.RecordData.size();
+  return Symbols.substream(ScopeBegin, EndOffset);
+}