Propagate command interpreter errors from lldlbinit

This patch ensures that we propagate errors coming from the lldbinit
file trough the command/script interpreter. Before, if you did something
like command script import syntax_error.py, and the python file
contained a syntax error, lldb wouldn't tell you about it. This changes
with the current patch: errors are now propagated by default.

PS: Jim authored this change and I added testing.

Differential revision: https://reviews.llvm.org/D61579

llvm-svn: 360216

1 files changed, 21 insertions, 3 deletions

diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index 0811822ff14..df583bc72dc 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -2173,6 +2173,7 @@ void CommandInterpreter::SourceInitFile(bool in_cwd,
     const bool saved_batch = SetBatchCommandMode(true);
     CommandInterpreterRunOptions options;
     options.SetSilent(true);
+    options.SetPrintErrors(true);
     options.SetStopOnError(false);
     options.SetStopOnContinue(true);
 
@@ -2364,7 +2365,8 @@ enum {
   eHandleCommandFlagEchoCommand = (1u << 2),
   eHandleCommandFlagEchoCommentCommand = (1u << 3),
   eHandleCommandFlagPrintResult = (1u << 4),
-  eHandleCommandFlagStopOnCrash = (1u << 5)
+  eHandleCommandFlagPrintErrors = (1u << 5),
+  eHandleCommandFlagStopOnCrash = (1u << 6)
 };
 
 void CommandInterpreter::HandleCommandsFromFile(
@@ -2463,6 +2465,17 @@ void CommandInterpreter::HandleCommandsFromFile(
     flags |= eHandleCommandFlagPrintResult;
   }
 
+  if (options.m_print_errors == eLazyBoolCalculate) {
+    if (m_command_source_flags.empty()) {
+      // Print output by default
+      flags |= eHandleCommandFlagPrintErrors;
+    } else if (m_command_source_flags.back() & eHandleCommandFlagPrintErrors) {
+      flags |= eHandleCommandFlagPrintErrors;
+    }
+  } else if (options.m_print_errors == eLazyBoolYes) {
+    flags |= eHandleCommandFlagPrintErrors;
+  }
+
   if (flags & eHandleCommandFlagPrintResult) {
     debugger.GetOutputFile()->Printf("Executing commands in '%s'.\n",
                                      cmd_file_path.c_str());
@@ -2790,7 +2803,9 @@ void CommandInterpreter::IOHandlerInputComplete(IOHandler &io_handler,
   HandleCommand(line.c_str(), eLazyBoolCalculate, result);
 
   // Now emit the command output text from the command we just executed
-  if (io_handler.GetFlags().Test(eHandleCommandFlagPrintResult)) {
+  if ((result.Succeeded() &&
+       io_handler.GetFlags().Test(eHandleCommandFlagPrintResult)) ||
+      io_handler.GetFlags().Test(eHandleCommandFlagPrintErrors)) {
     // Display any STDOUT/STDERR _prior_ to emitting the command result text
     GetProcessOutput();
 
@@ -2960,8 +2975,11 @@ CommandInterpreter::GetIOHandler(bool force_create,
         flags |= eHandleCommandFlagEchoCommentCommand;
       if (options->m_print_results != eLazyBoolNo)
         flags |= eHandleCommandFlagPrintResult;
+      if (options->m_print_errors != eLazyBoolNo)
+        flags |= eHandleCommandFlagPrintErrors;
     } else {
-      flags = eHandleCommandFlagEchoCommand | eHandleCommandFlagPrintResult;
+      flags = eHandleCommandFlagEchoCommand | eHandleCommandFlagPrintResult |
+              eHandleCommandFlagPrintErrors;
     }
 
     m_command_io_handler_sp = std::make_shared<IOHandlerEditline>(