SymbolVendor: Move compile unit handling into the SymbolFile class

Summary:
SymbolFile classes are responsible for creating CompileUnit instances
and they already need to have a notion of the id<->CompileUnit mapping
(because of APIs like ParseCompileUnitAtIndex). However, the
SymbolVendor has remained as the thing responsible for caching created
units (which the SymbolFiles were calling via convoluted constructs like
"m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(...)").

This patch moves the responsibility of caching the units into the
SymbolFile class. It does this by moving the implementation of
SymbolVendor::{GetNumCompileUnits,GetCompileUnitAtIndex} into the
equivalent SymbolFile functions. The SymbolVendor functions become just
a passthrough much like the rest of SymbolVendor.

The original implementations of SymbolFile::GetNumCompileUnits is moved
to "CalculateNumCompileUnits", and are made protected, as the "Get"
function is the external api of the class.
SymbolFile::ParseCompileUnitAtIndex is made protected for the same
reason.

This is the first step in removing the SymbolVendor indirection, as
proposed in
<http://lists.llvm.org/pipermail/lldb-dev/2019-June/015071.html>. After
removing all interesting logic from the SymbolVendor class, I'll proceed
with removing the indirection itself.

Reviewers: clayborg, jingham, JDevlieghere

Subscribers: jdoerfert, lldb-commits

Differential Revision: https://reviews.llvm.org/D65089

llvm-svn: 366791

1 files changed, 3 insertions, 4 deletions

diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
index 20daff219a0..88bd5de5435 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
@@ -68,13 +68,9 @@ public:
 
   // Compile Unit function calls
 
-  uint32_t GetNumCompileUnits() override;
-
   void
   ParseDeclsForContext(lldb_private::CompilerDeclContext decl_ctx) override;
 
-  lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
-
   lldb::LanguageType
   ParseLanguage(lldb_private::CompileUnit &comp_unit) override;
 
@@ -157,6 +153,9 @@ public:
   void DumpClangAST(Stream &s) override;
 
 private:
+  uint32_t CalculateNumCompileUnits() override;
+
+  lldb::CompUnitSP ParseCompileUnitAtIndex(uint32_t index) override;
 
   size_t FindTypesByName(llvm::StringRef name, uint32_t max_matches,
                          TypeMap &types);