Fixed a problem where -gmodules debug info would be loaded by the DWO file support accidentally and cause 1000s of files to be mapped into LLDB's address space for each .o file that reference a module.

<rdar://problem/26580266> -gmodules causes LLDB.framework to map hundreds of copies of the same .pcm file

llvm-svn: 271543

1 files changed, 6 insertions, 0 deletions

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index a67f72ba50d..a0fc2372251 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -1769,6 +1769,12 @@ SymbolFileDWARF::GetDIE (const DIERef &die_ref)
 std::unique_ptr<SymbolFileDWARFDwo>
 SymbolFileDWARF::GetDwoSymbolFileForCompileUnit(DWARFCompileUnit &dwarf_cu, const DWARFDebugInfoEntry &cu_die)
 {
+    // If we are using a dSYM file, we never want the standard DWO files since
+    // the -gmodule support uses the same DWO machanism to specify full debug
+    // info files for modules.
+    if (GetDebugMapSymfile())
+        return nullptr;
+
     const char *dwo_name = cu_die.GetAttributeValueAsString(this, &dwarf_cu, DW_AT_GNU_dwo_name, nullptr);
     if (!dwo_name)
         return nullptr;