Fixed an assertion that could happen if we happened to parse a mach-o object

file that had a symbol that had a section specified where the section had
zero size. We now honor this section definition for the symbol and don't
assert anymore.

llvm-svn: 138646

1 files changed, 18 insertions, 1 deletions

diff --git a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
index 083cb1f114b..4229cb7e091 100644
--- a/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
+++ b/lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
@@ -686,7 +686,18 @@ public:
                 }
             }
             if (m_section_infos[n_sect].vm_range.Contains(file_addr))
+            {
+                // Symbol is in section.
                 return m_section_infos[n_sect].section;
+            }
+            else if (m_section_infos[n_sect].vm_range.GetByteSize () == 0 &&
+                     m_section_infos[n_sect].vm_range.GetBaseAddress() == file_addr)
+            {
+                // Symbol is in section with zero size, but has the same start
+                // address as the section. This can happen with linker symbols
+                // (symbols that start with the letter 'l' or 'L'.
+                return m_section_infos[n_sect].section;
+            }
         }
         return m_section_list->FindSectionContainingFileAddress(file_addr).get();
     }
@@ -1162,7 +1173,13 @@ ObjectFileMachO::ParseSymtab (bool minimize)
                             case NListTypeSection:          // N_SECT
                                 symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
 
-                                assert(symbol_section != NULL);
+                                if (symbol_section == NULL)
+                                {
+                                    // TODO: warn about this?
+                                    add_nlist = false;
+                                    break;
+                                }
+
                                 if (TEXT_eh_frame_sectID == nlist.n_sect)
                                 {
                                     type = eSymbolTypeException;