Collect module import remarks in the types log.

lldb/source/Plugins/TypeSystem/Swift/StoringDiagnosticConsumer.h

@@ -15,6 +15,7 @@
 
 #include "Plugins/ExpressionParser/Swift/SwiftDiagnostic.h"
 
+#include "lldb/Utility/LLDBLog.h"
 #include "lldb/Utility/StreamString.h"
 
 #include "swift/AST/DiagnosticEngine.h"
@@ -198,6 +199,13 @@ class StoringDiagnosticConsumer : public swift::DiagnosticConsumer {
       std::string &s = os.str();
       formatted_text = !s.empty() ? std::move(s) : std::string(text);
     }
+    if (info.Kind == swift::DiagnosticKind::Remark &&
+        info.ID == swift::diag::module_loaded.ID) {
+      // Divert module import remarks into the logs.
+      LLDB_LOG(GetLog(LLDBLog::Types), "{0} Module import remark: {1}",
+               m_ast_context.GetDescription(), formatted_text);
+      return;
+    }
     RawDiagnostic diagnostic(
         formatted_text, info.Kind, bufferName.str(), bufferID, line_col.first,
         line_col.second,

lldb/source/Plugins/TypeSystem/Swift/SwiftASTContext.cpp

@@ -979,7 +979,9 @@ SwiftASTContext::SwiftASTContext(std::string description,
   // Set the clang modules cache path.
   m_compiler_invocation_ap->setClangModuleCachePath(
       GetClangModulesCacheProperty());
+}
 
+void SwiftASTContext::SetCompilerInvocationLLDBOverrides() {
   swift::IRGenOptions &ir_gen_opts =
       m_compiler_invocation_ap->getIRGenOptions();
   ir_gen_opts.OutputKind = swift::IRGenOutputKind::Module;
@@ -997,6 +999,7 @@ SwiftASTContext::SwiftASTContext(std::string description,
   // for the protocol conforming types.
   lang_opts.AllowModuleWithCompilerErrors = true;
   lang_opts.EnableTargetOSChecking = false;
+  lang_opts.EnableModuleLoadingRemarks = true;
 
   // Bypass deserialization safety to allow deserializing internal details from
   // swiftmodule files.
@@ -1964,6 +1967,8 @@ SwiftASTContext::CreateInstance(lldb::LanguageType language, Module &module,
   ConfigureResourceDirs(swift_ast_sp->GetCompilerInvocation(), resource_dir,
                         triple);
 
+  swift_ast_sp->SetCompilerInvocationLLDBOverrides();
+
   // Apply the working directory to all relative paths.
   std::vector<std::string> DeserializedArgs = swift_ast_sp->GetClangArguments();
   swift_ast_sp->GetClangImporterOptions().ExtraArgs.clear();
@@ -2490,6 +2495,8 @@ lldb::TypeSystemSP SwiftASTContext::CreateInstance(
   // otherwise no modules will be found.
   swift_ast_sp->InitializeSearchPathOptions(module_search_paths,
                                             framework_search_paths);
+  swift_ast_sp->SetCompilerInvocationLLDBOverrides();
+
   if (!swift_ast_sp->GetClangImporter()) {
     logError("couldn't create a ClangImporter");
     return {};
@@ -2771,6 +2778,8 @@ lldb::TypeSystemSP SwiftASTContext::CreateInstance(
   // otherwise no modules will be found.
   swift_ast_sp->InitializeSearchPathOptions(module_search_paths,
                                             framework_search_paths);
+  swift_ast_sp->SetCompilerInvocationLLDBOverrides();
+
   if (!swift_ast_sp->GetClangImporter()) {
     logError("couldn't create a ClangImporter");
     return {};

lldb/source/Plugins/TypeSystem/Swift/SwiftASTContext.h

@@ -211,6 +211,9 @@ class SwiftASTContext : public TypeSystemSwift {
       std::set<lldb::LanguageType> &languages_for_types,
       std::set<lldb::LanguageType> &languages_for_expressions);
 
+  /// Set LangOpt overrides LLDB needs.
+  void SetCompilerInvocationLLDBOverrides();
+
   bool SupportsLanguage(lldb::LanguageType language) override;
 
   SwiftASTContext *GetSwiftASTContext(const SymbolContext *sc) const override {

lldb/test/API/lang/swift/module_import/Makefile

@@ -0,0 +1,2 @@
+SWIFT_SOURCES := main.swift
+include Makefile.rules

lldb/test/API/lang/swift/module_import/TestSwiftModuleImport.py

@@ -0,0 +1,22 @@
+import lldb
+from lldbsuite.test.decorators import *
+import lldbsuite.test.lldbtest as lldbtest
+import lldbsuite.test.lldbutil as lldbutil
+import unittest2
+
+class TestSwiftModuleImport(lldbtest.TestBase):
+
+    mydir = lldbtest.TestBase.compute_mydir(__file__)
+    NO_DEBUG_INFO_TESTCASE = True
+
+    @swiftTest
+    def test(self):
+        self.build()
+        target, process, thread, bkpt = lldbutil.run_to_source_breakpoint(
+            self, 'break here', lldb.SBFileSpec('main.swift'))
+
+        log = self.getBuildArtifact("types.log")
+        self.runCmd('log enable lldb types -f "%s"' % log)
+        self.expect("expression -- 0")
+        self.filecheck('platform shell cat "%s"' % log, __file__)
+#       CHECK: SwiftASTContextForExpressions{{.*}}Module import remark: loaded module 'a'

lldb/test/API/lang/swift/module_import/main.swift

@@ -0,0 +1 @@
+print("break here")

lldb/test/API/lang/swift/system_framework/TestSwiftSystemFramework.py

@@ -2,13 +2,12 @@
 from lldbsuite.test.decorators import *
 import lldbsuite.test.lldbtest as lldbtest
 import lldbsuite.test.lldbutil as lldbutil
-import os
 import unittest2
 
-
 class TestSwiftSystemFramework(lldbtest.TestBase):
 
     mydir = lldbtest.TestBase.compute_mydir(__file__)
+    NO_DEBUG_INFO_TESTCASE = True
 
     @swiftTest
     @skipIf(oslist=no_match(["macosx"]))
@@ -22,16 +21,7 @@ def test_system_framework(self):
         self.runCmd('log enable lldb types -f "%s"' % log)
         self.expect("settings set target.use-all-compiler-flags true")
         self.expect("expression -- 0")
-        pos = 0
-        neg = 0
-        import io
-        with open(log, "r", encoding='utf-8') as logfile:
-            for line in logfile:
-                if "-- rejecting framework path " in line:
-                    pos += 1
-                elif ("reflection metadata" not in line) and \
-                     ("/System/Library/Frameworks" in line):
-                    neg += 1
-
-        self.assertGreater(pos, 0, "sanity check failed")
-        self.assertEqual(neg, 0, "found /System/Library/Frameworks in log")
+        self.filecheck('platform shell cat "%s"' % log, __file__)
+#       CHECK: SwiftASTContextForExpressions{{.*}}-- rejecting framework path
+#       CHECK: SwiftASTContextForExpressions{{.*}}LogConfiguration()
+#       CHECK-NOT: LogConfiguration(){{.*}}/System/Library/Frameworks