Improve the handling of missing elf symtab and missing symbol sizes

* Generate artificial symbol names from eh_fame during symbol parsing
  so these symbols are already present when we calcualte the size of
  the symbols where 0 is specified.
* Fix symbol size calculation for the last symbol in the file where
  it have to last until the end of the parent section.

Differential revision: http://reviews.llvm.org/D16996

llvm-svn: 260369

lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.h

@@ -150,9 +150,6 @@ public:
     lldb_private::Symtab *
     GetSymtab() override;
 
-    lldb_private::Symbol *
-    ResolveSymbolForAddress(const lldb_private::Address& so_addr, bool verify_unique) override;
-
     bool
     IsStripped () override;
 
@@ -349,6 +346,10 @@ private:
                            const ELFSectionHeaderInfo *rela_hdr,
                            lldb::user_id_t section_id);
 
+    void
+    ParseUnwindSymbols(lldb_private::Symtab *symbol_table,
+                       lldb_private::DWARFCallFrameInfo* eh_frame);
+
     /// Relocates debug sections
     unsigned
     RelocateDebugSections(const elf::ELFSectionHeader *rel_hdr, lldb::user_id_t rel_id);