Deserialize Clang module search path from DWARF

This patch properly extracts the full submodule path as well as its
search paths from DWARF import decls and passes it on to the
ClangModulesDeclVendor.

rdar://problem/47970144

Differential Revision: https://reviews.llvm.org/D58090

llvm-svn: 353961
diff --git a/lldb/include/lldb/Symbol/CompileUnit.h b/lldb/include/lldb/Symbol/CompileUnit.h
index d544794..0468e53 100644
--- a/lldb/include/lldb/Symbol/CompileUnit.h
+++ b/lldb/include/lldb/Symbol/CompileUnit.h
@@ -266,7 +266,7 @@
   /// @return
   ///     A list of imported module names.
   //------------------------------------------------------------------
-  const std::vector<ConstString> &GetImportedModules();
+  const std::vector<SourceModule> &GetImportedModules();
 
   //------------------------------------------------------------------
   /// Get the SymbolFile plug-in user data.
@@ -414,28 +414,29 @@
   size_t GetNumFunctions() const { return m_functions_by_uid.size(); }
 
 protected:
-  void *m_user_data; ///< User data for the SymbolFile parser to store
-                     ///information into.
-  lldb::LanguageType
-      m_language; ///< The programming language enumeration value.
-  Flags m_flags;  ///< Compile unit flags that help with partial parsing.
-
+  /// User data for the SymbolFile parser to store information into.
+  void *m_user_data;
+  /// The programming language enumeration value.
+  lldb::LanguageType m_language;
+  /// Compile unit flags that help with partial parsing.
+  Flags m_flags;
   /// Maps UIDs to functions.
   llvm::DenseMap<lldb::user_id_t, lldb::FunctionSP> m_functions_by_uid;
-  std::vector<ConstString> m_imported_modules; ///< All modules, including the
-                                               ///current module, imported by
-                                               ///this
-                                               ///< compile unit.
-  FileSpecList m_support_files; ///< Files associated with this compile unit's
-                                ///line table and declarations.
-  std::unique_ptr<LineTable>
-      m_line_table_up; ///< Line table that will get parsed on demand.
-  DebugMacrosSP
-      m_debug_macros_sp; ///< Debug macros that will get parsed on demand.
-  lldb::VariableListSP m_variables; ///< Global and static variable list that
-                                    ///will get parsed on demand.
-  lldb_private::LazyBool m_is_optimized; /// eLazyBoolYes if this compile unit
-                                         /// was compiled with optimization.
+  /// All modules, including the current module, imported by this
+  /// compile unit.
+  std::vector<SourceModule> m_imported_modules;
+  /// Files associated with this compile unit's line table and
+  /// declarations.
+  FileSpecList m_support_files;
+  /// Line table that will get parsed on demand.
+  std::unique_ptr<LineTable> m_line_table_up;
+  /// Debug macros that will get parsed on demand.
+  DebugMacrosSP m_debug_macros_sp;
+  /// Global and static variable list that will get parsed on demand.
+  lldb::VariableListSP m_variables;
+  /// eLazyBoolYes if this compile unit was compiled with
+  /// optimization.
+  lldb_private::LazyBool m_is_optimized;
 
 private:
   enum {
diff --git a/lldb/include/lldb/Symbol/SourceModule.h b/lldb/include/lldb/Symbol/SourceModule.h
new file mode 100644
index 0000000..cac99ba
--- /dev/null
+++ b/lldb/include/lldb/Symbol/SourceModule.h
@@ -0,0 +1,27 @@
+//===-- SourceModule.h ------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_SourceModule_h_
+#define liblldb_SourceModule_h_
+
+#include "lldb/Utility/ConstString.h"
+#include <vector>
+
+namespace lldb_private {
+
+/// Information needed to import a source-language module.
+struct SourceModule {
+  /// Something like "Module.Submodule".
+  std::vector<ConstString> path;
+  ConstString search_path;
+  ConstString sysroot;
+};
+
+}; // namespace lldb_private
+
+#endif
diff --git a/lldb/include/lldb/Symbol/SymbolFile.h b/lldb/include/lldb/Symbol/SymbolFile.h
index bdcebe1..b77f167 100644
--- a/lldb/include/lldb/Symbol/SymbolFile.h
+++ b/lldb/include/lldb/Symbol/SymbolFile.h
@@ -14,6 +14,7 @@
 #include "lldb/Symbol/CompilerDeclContext.h"
 #include "lldb/Symbol/CompilerType.h"
 #include "lldb/Symbol/Function.h"
+#include "lldb/Symbol/SourceModule.h"
 #include "lldb/Symbol/Type.h"
 #include "lldb/lldb-private.h"
 
@@ -135,7 +136,7 @@
 
   virtual bool
   ParseImportedModules(const SymbolContext &sc,
-                       std::vector<ConstString> &imported_modules) = 0;
+                       std::vector<SourceModule> &imported_modules) = 0;
   virtual size_t ParseBlocksRecursive(Function &func) = 0;
   virtual size_t ParseVariablesForContext(const SymbolContext &sc) = 0;
   virtual Type *ResolveTypeUID(lldb::user_id_t type_uid) = 0;
diff --git a/lldb/include/lldb/Symbol/SymbolVendor.h b/lldb/include/lldb/Symbol/SymbolVendor.h
index 37bea65..27b2ac9 100644
--- a/lldb/include/lldb/Symbol/SymbolVendor.h
+++ b/lldb/include/lldb/Symbol/SymbolVendor.h
@@ -13,6 +13,7 @@
 
 #include "lldb/Core/ModuleChild.h"
 #include "lldb/Core/PluginInterface.h"
+#include "lldb/Symbol/SourceModule.h"
 #include "lldb/Symbol/TypeList.h"
 #include "lldb/Symbol/TypeMap.h"
 #include "lldb/lldb-private.h"
@@ -60,8 +61,9 @@
 
   virtual size_t ParseTypes(CompileUnit &comp_unit);
 
-  virtual bool ParseImportedModules(const SymbolContext &sc,
-                                    std::vector<ConstString> &imported_modules);
+  virtual bool
+  ParseImportedModules(const SymbolContext &sc,
+                       std::vector<SourceModule> &imported_modules);
 
   virtual size_t ParseBlocksRecursive(Function &func);
 
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Bar.h b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Bar.h
new file mode 100644
index 0000000..3d9a88c
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Bar.h
@@ -0,0 +1 @@
+struct Bar { int success; };
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Foo.h b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Foo.h
new file mode 100644
index 0000000..1fe02e8
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Foo.h
@@ -0,0 +1 @@
+struct Foo {};
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Makefile b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Makefile
new file mode 100644
index 0000000..796b4dc
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../../../make
+CXX_SOURCES := main.cpp
+
+CFLAGS += $(MANDATORY_MODULE_BUILD_CFLAGS)
+
+include $(LEVEL)/Makefile.rules
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/TestCXXModulesImport.py b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/TestCXXModulesImport.py
new file mode 100644
index 0000000..9601db2
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/TestCXXModulesImport.py
@@ -0,0 +1,31 @@
+"""Test that importing modules in C++ works as expected."""
+
+from __future__ import print_function
+
+
+from distutils.version import StrictVersion
+import unittest2
+import os
+import time
+import lldb
+import platform
+
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class CXXModulesImportTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipUnlessDarwin
+    @skipIf(macos_version=["<", "10.12"])
+    def test_expr(self):
+        self.build()
+        exe = self.getBuildArtifact("a.out")
+        target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
+            self, 'break here', lldb.SBFileSpec('main.cpp'))
+
+        self.expect("expr -- @import Bar")
+        self.expect("expr -- Bar()", substrs = ["success"])
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/main.cpp b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/main.cpp
new file mode 100644
index 0000000..a6acf9a
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/main.cpp
@@ -0,0 +1,7 @@
+#include "Foo.h"
+
+int main(int argc, char **argv) {
+  Foo foo;
+  // break here.
+  return 0;
+}
diff --git a/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/module.modulemap b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/module.modulemap
new file mode 100644
index 0000000..4221d0f
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/lang/cpp/modules-import/module.modulemap
@@ -0,0 +1,7 @@
+module Foo {
+  header "Foo.h"
+}
+
+module Bar {
+  header "Bar.h"
+}
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
index 266b1e2..acb08a6 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
@@ -113,24 +113,19 @@
 
   void moduleImport(SourceLocation import_location, clang::ModuleIdPath path,
                     const clang::Module * /*null*/) override {
-    std::vector<ConstString> string_path;
+    SourceModule module;
 
-    for (const std::pair<IdentifierInfo *, SourceLocation> &component : path) {
-      string_path.push_back(ConstString(component.first->getName()));
-    }
+    for (const std::pair<IdentifierInfo *, SourceLocation> &component : path)
+      module.path.push_back(ConstString(component.first->getName()));
 
     StreamString error_stream;
 
     ClangModulesDeclVendor::ModuleVector exported_modules;
-
-    if (!m_decl_vendor.AddModule(string_path, &exported_modules,
-                                 m_error_stream)) {
+    if (!m_decl_vendor.AddModule(module, &exported_modules, m_error_stream))
       m_has_errors = true;
-    }
 
-    for (ClangModulesDeclVendor::ModuleID module : exported_modules) {
+    for (ClangModulesDeclVendor::ModuleID module : exported_modules)
       m_persistent_vars.AddHandLoadedClangModule(module);
-    }
   }
 
   bool hasErrors() { return m_has_errors; }
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
index de5c809..b08c454 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
@@ -28,6 +28,7 @@
 #include "lldb/Host/Host.h"
 #include "lldb/Host/HostInfo.h"
 #include "lldb/Symbol/CompileUnit.h"
+#include "lldb/Symbol/SourceModule.h"
 #include "lldb/Target/Target.h"
 #include "lldb/Utility/FileSpec.h"
 #include "lldb/Utility/LLDBAssert.h"
@@ -71,7 +72,7 @@
 
   ~ClangModulesDeclVendorImpl() override = default;
 
-  bool AddModule(ModulePath &path, ModuleVector *exported_modules,
+  bool AddModule(const SourceModule &module, ModuleVector *exported_modules,
                  Stream &error_stream) override;
 
   bool AddModulesForCompileUnit(CompileUnit &cu, ModuleVector &exported_modules,
@@ -184,7 +185,7 @@
   }
 }
 
-bool ClangModulesDeclVendorImpl::AddModule(ModulePath &path,
+bool ClangModulesDeclVendorImpl::AddModule(const SourceModule &module,
                                            ModuleVector *exported_modules,
                                            Stream &error_stream) {
   // Fail early.
@@ -199,7 +200,7 @@
 
   std::vector<ConstString> imported_module;
 
-  for (ConstString path_component : path) {
+  for (ConstString path_component : module.path) {
     imported_module.push_back(path_component);
   }
 
@@ -214,11 +215,34 @@
     }
   }
 
-  if (!m_compiler_instance->getPreprocessor()
-           .getHeaderSearchInfo()
-           .lookupModule(path[0].GetStringRef())) {
+  clang::HeaderSearch &HS =
+    m_compiler_instance->getPreprocessor().getHeaderSearchInfo();
+
+  if (module.search_path) {
+    auto path_begin = llvm::sys::path::begin(module.search_path.GetStringRef());
+    auto path_end = llvm::sys::path::end(module.search_path.GetStringRef());
+    auto sysroot_begin = llvm::sys::path::begin(module.sysroot.GetStringRef());
+    auto sysroot_end = llvm::sys::path::end(module.sysroot.GetStringRef());
+    // FIXME: Use C++14 std::equal(it, it, it, it) variant once it's available.
+    bool is_system_module = (std::distance(path_begin, path_end) >=
+                             std::distance(sysroot_begin, sysroot_end)) &&
+                            std::equal(sysroot_begin, sysroot_end, path_begin);
+    // No need to inject search paths to modules in the sysroot.
+    if (!is_system_module) {
+      bool is_system = true;
+      bool is_framework = false;
+      auto *dir =
+          HS.getFileMgr().getDirectory(module.search_path.GetStringRef());
+      auto *file = HS.lookupModuleMapFile(dir, is_framework);
+      if (!HS.loadModuleMapFile(file, is_system))
+        error_stream.Printf("error: No module map file in %s\n",
+                            module.search_path.AsCString());
+      return false;
+    }
+  }
+  if (!HS.lookupModule(module.path.front().GetStringRef())) {
     error_stream.Printf("error: Header search couldn't locate module %s\n",
-                        path[0].AsCString());
+                        module.path.front().AsCString());
     return false;
   }
 
@@ -230,7 +254,7 @@
     clang::SourceManager &source_manager =
         m_compiler_instance->getASTContext().getSourceManager();
 
-    for (ConstString path_component : path) {
+    for (ConstString path_component : module.path) {
       clang_path.push_back(std::make_pair(
           &m_compiler_instance->getASTContext().Idents.get(
               path_component.GetStringRef()),
@@ -250,19 +274,18 @@
   if (!top_level_module) {
     diagnostic_consumer->DumpDiagnostics(error_stream);
     error_stream.Printf("error: Couldn't load top-level module %s\n",
-                        path[0].AsCString());
+                        module.path.front().AsCString());
     return false;
   }
 
   clang::Module *submodule = top_level_module;
 
-  for (size_t ci = 1; ci < path.size(); ++ci) {
-    llvm::StringRef component = path[ci].GetStringRef();
-    submodule = submodule->findSubmodule(component.str());
+  for (auto &component : llvm::ArrayRef<ConstString>(module.path).drop_front()) {
+    submodule = submodule->findSubmodule(component.GetStringRef());
     if (!submodule) {
       diagnostic_consumer->DumpDiagnostics(error_stream);
       error_stream.Printf("error: Couldn't load submodule %s\n",
-                          component.str().c_str());
+                          component.GetCString());
       return false;
     }
   }
@@ -289,12 +312,16 @@
   switch (language) {
   default:
     return false;
-  // C++ and friends to be added
   case lldb::LanguageType::eLanguageTypeC:
   case lldb::LanguageType::eLanguageTypeC11:
   case lldb::LanguageType::eLanguageTypeC89:
   case lldb::LanguageType::eLanguageTypeC99:
+  case lldb::LanguageType::eLanguageTypeC_plus_plus:
+  case lldb::LanguageType::eLanguageTypeC_plus_plus_03:
+  case lldb::LanguageType::eLanguageTypeC_plus_plus_11:
+  case lldb::LanguageType::eLanguageTypeC_plus_plus_14:
   case lldb::LanguageType::eLanguageTypeObjC:
+  case lldb::LanguageType::eLanguageTypeObjC_plus_plus:
     return true;
   }
 }
@@ -303,21 +330,10 @@
     CompileUnit &cu, ClangModulesDeclVendor::ModuleVector &exported_modules,
     Stream &error_stream) {
   if (LanguageSupportsClangModules(cu.GetLanguage())) {
-    std::vector<ConstString> imported_modules = cu.GetImportedModules();
-
-    for (ConstString imported_module : imported_modules) {
-      std::vector<ConstString> path;
-
-      path.push_back(imported_module);
-
-      if (!AddModule(path, &exported_modules, error_stream)) {
+    for (auto &imported_module : cu.GetImportedModules())
+      if (!AddModule(imported_module, &exported_modules, error_stream))
         return false;
-      }
-    }
-
-    return true;
   }
-
   return true;
 }
 
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h
index bcb233a..c5b5a88 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h
@@ -36,7 +36,7 @@
   //------------------------------------------------------------------
   /// Add a module to the list of modules to search.
   ///
-  /// @param[in] path
+  /// @param[in] module
   ///     The path to the exact module to be loaded.  E.g., if the desired
   ///     module is std.io, then this should be { "std", "io" }.
   ///
@@ -53,7 +53,8 @@
   ///     compiler encountered a fatal error during a previous module
   ///     load, then this will always return false for this ModuleImporter.
   //------------------------------------------------------------------
-  virtual bool AddModule(ModulePath &path, ModuleVector *exported_modules,
+  virtual bool AddModule(const SourceModule &module,
+                         ModuleVector *exported_modules,
                          Stream &error_stream) = 0;
 
   //------------------------------------------------------------------
diff --git a/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.h b/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.h
index 373a633..ef3073b 100644
--- a/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.h
+++ b/lldb/source/Plugins/SymbolFile/Breakpad/SymbolFileBreakpad.h
@@ -69,9 +69,9 @@
                          FileSpecList &support_files) override;
   size_t ParseTypes(CompileUnit &cu) override { return 0; }
 
-  bool
-  ParseImportedModules(const SymbolContext &sc,
-                       std::vector<ConstString> &imported_modules) override {
+  bool ParseImportedModules(
+      const SymbolContext &sc,
+      std::vector<lldb_private::SourceModule> &imported_modules) override {
     return false;
   }
 
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index 6a1e674..55beef0 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -72,6 +72,7 @@
 
 #include "llvm/Support/FileSystem.h"
 
+#include <algorithm>
 #include <map>
 #include <memory>
 
@@ -911,43 +912,57 @@
 
 bool SymbolFileDWARF::ParseImportedModules(
     const lldb_private::SymbolContext &sc,
-    std::vector<lldb_private::ConstString> &imported_modules) {
+    std::vector<SourceModule> &imported_modules) {
   ASSERT_MODULE_LOCK(this);
   assert(sc.comp_unit);
   DWARFUnit *dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
-  if (dwarf_cu) {
-    if (ClangModulesDeclVendor::LanguageSupportsClangModules(
-            sc.comp_unit->GetLanguage())) {
-      UpdateExternalModuleListIfNeeded();
+  if (!dwarf_cu)
+    return false;
+  if (!ClangModulesDeclVendor::LanguageSupportsClangModules(
+          sc.comp_unit->GetLanguage()))
+    return false;
+  UpdateExternalModuleListIfNeeded();
 
-      if (sc.comp_unit) {
-        const DWARFDIE die = dwarf_cu->DIE();
+  if (!sc.comp_unit)
+    return false;
 
-        if (die) {
-          for (DWARFDIE child_die = die.GetFirstChild(); child_die;
-               child_die = child_die.GetSibling()) {
-            if (child_die.Tag() == DW_TAG_imported_declaration) {
-              if (DWARFDIE module_die =
-                      child_die.GetReferencedDIE(DW_AT_import)) {
-                if (module_die.Tag() == DW_TAG_module) {
-                  if (const char *name = module_die.GetAttributeValueAsString(
-                          DW_AT_name, nullptr)) {
-                    ConstString const_name(name);
-                    imported_modules.push_back(const_name);
-                  }
-                }
-              }
-            }
-          }
-        }
-      } else {
-        for (const auto &pair : m_external_type_modules) {
-          imported_modules.push_back(pair.first);
-        }
+  const DWARFDIE die = dwarf_cu->DIE();
+  if (!die)
+    return false;
+
+  for (DWARFDIE child_die = die.GetFirstChild(); child_die;
+       child_die = child_die.GetSibling()) {
+    if (child_die.Tag() != DW_TAG_imported_declaration)
+      continue;
+
+    DWARFDIE module_die = child_die.GetReferencedDIE(DW_AT_import);
+    if (module_die.Tag() != DW_TAG_module)
+      continue;
+
+    if (const char *name =
+            module_die.GetAttributeValueAsString(DW_AT_name, nullptr)) {
+      SourceModule module;
+      module.path.push_back(ConstString(name));
+
+      DWARFDIE parent_die = module_die;
+      while ((parent_die = parent_die.GetParent())) {
+        if (parent_die.Tag() != DW_TAG_module)
+          break;
+        if (const char *name =
+                parent_die.GetAttributeValueAsString(DW_AT_name, nullptr))
+          module.path.push_back(ConstString(name));
       }
+      std::reverse(module.path.begin(), module.path.end());
+      if (const char *include_path = module_die.GetAttributeValueAsString(
+              DW_AT_LLVM_include_path, nullptr))
+        module.search_path = ConstString(include_path);
+      if (const char *sysroot = module_die.GetAttributeValueAsString(
+              DW_AT_LLVM_isysroot, nullptr))
+        module.sysroot = ConstString(sysroot);
+      imported_modules.push_back(module);
     }
   }
-  return false;
+  return true;
 }
 
 struct ParseDWARFLineTableCallbackInfo {
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
index 36c267a..a93129d 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -125,7 +125,7 @@
 
   bool ParseImportedModules(
       const lldb_private::SymbolContext &sc,
-      std::vector<lldb_private::ConstString> &imported_modules) override;
+      std::vector<lldb_private::SourceModule> &imported_modules) override;
 
   size_t ParseBlocksRecursive(lldb_private::Function &func) override;
 
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
index eccc757..8bb41ad 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
@@ -670,7 +670,7 @@
 }
 
 bool SymbolFileDWARFDebugMap::ParseImportedModules(
-    const SymbolContext &sc, std::vector<ConstString> &imported_modules) {
+    const SymbolContext &sc, std::vector<SourceModule> &imported_modules) {
   SymbolFileDWARF *oso_dwarf = GetSymbolFile(sc);
   if (oso_dwarf)
     return oso_dwarf->ParseImportedModules(sc, imported_modules);
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h
index da50b48..c44f034f 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h
@@ -72,7 +72,7 @@
 
   bool ParseImportedModules(
       const lldb_private::SymbolContext &sc,
-      std::vector<lldb_private::ConstString> &imported_modules) override;
+      std::vector<lldb_private::SourceModule> &imported_modules) override;
   size_t ParseBlocksRecursive(lldb_private::Function &func) override;
   size_t
   ParseVariablesForContext(const lldb_private::SymbolContext &sc) override;
diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
index fecae7a..004609f 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp
@@ -1136,7 +1136,7 @@
 }
 
 bool SymbolFileNativePDB::ParseImportedModules(
-    const SymbolContext &sc, std::vector<ConstString> &imported_modules) {
+    const SymbolContext &sc, std::vector<SourceModule> &imported_modules) {
   // PDB does not yet support module debug info
   return false;
 }
diff --git a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
index 22e9fb7..1264244b 100644
--- a/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
+++ b/lldb/source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.h
@@ -94,9 +94,9 @@
                          FileSpecList &support_files) override;
   size_t ParseTypes(lldb_private::CompileUnit &comp_unit) override;
 
-  bool
-  ParseImportedModules(const SymbolContext &sc,
-                       std::vector<ConstString> &imported_modules) override;
+  bool ParseImportedModules(
+      const SymbolContext &sc,
+      std::vector<lldb_private::SourceModule> &imported_modules) override;
 
   size_t ParseBlocksRecursive(Function &func) override;
 
diff --git a/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp b/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
index 8d71b13..2c079c3 100644
--- a/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
+++ b/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
@@ -377,7 +377,7 @@
 
 bool SymbolFilePDB::ParseImportedModules(
     const lldb_private::SymbolContext &sc,
-    std::vector<lldb_private::ConstString> &imported_modules) {
+    std::vector<SourceModule> &imported_modules) {
   // PDB does not yet support module debug info
   return false;
 }
diff --git a/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.h b/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
index ee0c6d2..e3b0931 100644
--- a/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
+++ b/lldb/source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
@@ -74,7 +74,7 @@
 
   bool ParseImportedModules(
       const lldb_private::SymbolContext &sc,
-      std::vector<lldb_private::ConstString> &imported_modules) override;
+      std::vector<lldb_private::SourceModule> &imported_modules) override;
 
   size_t ParseBlocksRecursive(lldb_private::Function &func) override;
 
diff --git a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
index c875f88..d593e63 100644
--- a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
+++ b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.cpp
@@ -221,7 +221,7 @@
 }
 
 bool SymbolFileSymtab::ParseImportedModules(
-    const SymbolContext &sc, std::vector<ConstString> &imported_modules) {
+    const SymbolContext &sc, std::vector<SourceModule> &imported_modules) {
   return false;
 }
 
diff --git a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.h b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.h
index 5247b9f..f2e90c9 100644
--- a/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.h
+++ b/lldb/source/Plugins/SymbolFile/Symtab/SymbolFileSymtab.h
@@ -63,7 +63,7 @@
 
   bool ParseImportedModules(
       const lldb_private::SymbolContext &sc,
-      std::vector<lldb_private::ConstString> &imported_modules) override;
+      std::vector<lldb_private::SourceModule> &imported_modules) override;
 
   size_t ParseBlocksRecursive(lldb_private::Function &func) override;
 
diff --git a/lldb/source/Symbol/CompileUnit.cpp b/lldb/source/Symbol/CompileUnit.cpp
index 940090b..561f7cc 100644
--- a/lldb/source/Symbol/CompileUnit.cpp
+++ b/lldb/source/Symbol/CompileUnit.cpp
@@ -390,7 +390,7 @@
   m_variables = variables;
 }
 
-const std::vector<ConstString> &CompileUnit::GetImportedModules() {
+const std::vector<SourceModule> &CompileUnit::GetImportedModules() {
   if (m_imported_modules.empty() &&
       m_flags.IsClear(flagsParsedImportedModules)) {
     m_flags.Set(flagsParsedImportedModules);
diff --git a/lldb/source/Symbol/SymbolVendor.cpp b/lldb/source/Symbol/SymbolVendor.cpp
index c0f0b67..fd148a4 100644
--- a/lldb/source/Symbol/SymbolVendor.cpp
+++ b/lldb/source/Symbol/SymbolVendor.cpp
@@ -185,7 +185,7 @@
 }
 
 bool SymbolVendor::ParseImportedModules(
-    const SymbolContext &sc, std::vector<ConstString> &imported_modules) {
+    const SymbolContext &sc, std::vector<SourceModule> &imported_modules) {
   ModuleSP module_sp(GetModule());
   if (module_sp) {
     std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());