[Reproducers] Force replay in synchronous mode.

[JDevlieghere]

Summary

Replaying a reproducer in asynchronous mode never makes sense. This patch disables asynchronous mode during replay.

[JDevlieghere]

Be more precise in comment.

[davide]

Thanks!

lldb/trunk/lit/Reproducer/TestSynchronous.test

+# Ensure that replay happens in synchronous mode.
+
+# RUN: rm -rf %t.repro
+# RUN: %lldb -x -b --capture --capture-path %t.repro -o 'script lldb.debugger.SetAsync(True)' -o 'script lldb.debugger.GetAsync()' -o 'reproducer generate' | FileCheck %s --check-prefix CAPTURE
+# RUN: %lldb --replay %t.repro | FileCheck %s --check-prefix REPLAY
+
+# CAPTURE: script lldb.debugger.SetAsync(True)
+# CAPTURE-NEXT: script lldb.debugger.GetAsync()
+# CAPTURE-NEXT: True
+
+# REPLAY: script lldb.debugger.SetAsync(True)
+# REPLAY-NEXT: script lldb.debugger.GetAsync()
+# REPLAY-NEXT: False

lldb/trunk/source/Interpreter/CommandInterpreter.cpp

 
 CommandInterpreter::CommandInterpreter(Debugger &debugger,
                                        bool synchronous_execution)
     : Broadcaster(debugger.GetBroadcasterManager(),
                   CommandInterpreter::GetStaticBroadcasterClass().AsCString()),
       Properties(OptionValuePropertiesSP(
           new OptionValueProperties(ConstString("interpreter")))),
       IOHandlerDelegate(IOHandlerDelegate::Completion::LLDBCommand),
-      m_debugger(debugger), m_synchronous_execution(synchronous_execution),
+      m_debugger(debugger), m_synchronous_execution(true),
       m_skip_lldbinit_files(false), m_skip_app_init_files(false),
       m_command_io_handler_sp(), m_comment_char('#'),
       m_batch_command_mode(false), m_truncation_warning(eNoTruncation),
       m_command_source_depth(0), m_num_errors(0), m_quit_requested(false),
       m_stopped_for_crash(false) {
   SetEventName(eBroadcastBitThreadShouldExit, "thread-should-exit");
   SetEventName(eBroadcastBitResetPrompt, "reset-prompt");
   SetEventName(eBroadcastBitQuitCommandReceived, "quit");
+  SetSynchronous(synchronous_execution);
   CheckInWithManager();
   m_collection_sp->Initialize(g_interpreter_properties);
 }
 
 bool CommandInterpreter::GetExpandRegexAliases() const {
   const uint32_t idx = ePropertyExpandRegexAliases;
   return m_collection_sp->GetPropertyAtIndexAsBoolean(
       nullptr, idx, g_interpreter_properties[idx].default_uint_value != 0);
void CommandInterpreter::HandleCommandsFromFile(
   m_command_source_depth--;
   result.SetStatus(eReturnStatusSuccessFinishNoResult);
   debugger.SetAsyncExecution(old_async_execution);
 }
 
 bool CommandInterpreter::GetSynchronous() { return m_synchronous_execution; }
 
 void CommandInterpreter::SetSynchronous(bool value) {
+  // Asynchronous mode is not supported during reproducer replay.
+  if (repro::Reproducer::Instance().GetLoader())
+    return;
   m_synchronous_execution = value;
 }
 
 void CommandInterpreter::OutputFormattedHelpText(Stream &strm,
                                                  llvm::StringRef prefix,
                                                  llvm::StringRef help_text) {
   const uint32_t max_columns = m_debugger.GetTerminalWidth();