void REPL::IOHandlerActivated(IOHandler &io_handler) {
lldb::ProcessSP process_sp = m_target.GetProcessSP();
if (process_sp && process_sp->IsAlive())
return;
lldb::StreamFileSP error_sp(io_handler.GetErrorStreamFile());
error_sp->Printf("REPL requires a running target process.\n");
io_handler.SetIsDone(true);
}
void REPL::IOHandlerInputComplete(IOHandler &io_handler, std::string &code) {
lldb::StreamFileSP output_sp(io_handler.GetOutputStreamFile());
lldb::StreamFileSP error_sp(io_handler.GetErrorStreamFile());
bool extra_line = false;
bool did_quit = false;
if (code.empty()) {
m_code.AppendString("");
static_cast<IOHandlerEditline &>(io_handler)
.SetBaseLineNumber(m_code.GetSize() + 1);
} else {
Debugger &debugger = m_target.GetDebugger();
CommandInterpreter &ci = debugger.GetCommandInterpreter();
extra_line = ci.GetSpaceReplPrompts();
ExecutionContext exe_ctx(m_target.GetProcessSP()
->GetThreadList()
.GetSelectedThread()
->GetSelectedFrame()
.get());
lldb::ProcessSP process_sp(exe_ctx.GetProcessSP());
if (code[0] == ':') {
// Meta command
// Strip the ':'
code.erase(0, 1);
if (Args::StripSpaces(code)) {
// "lldb" was followed by arguments, so just execute the command dump
// the results
// Turn off prompt on quit in case the user types ":quit"
const bool saved_prompt_on_quit = ci.GetPromptOnQuit();
if (saved_prompt_on_quit)
ci.SetPromptOnQuit(false);
// Execute the command
CommandReturnObject result;
result.SetImmediateOutputStream(output_sp);
result.SetImmediateErrorStream(error_sp);
ci.HandleCommand(code.c_str(), eLazyBoolNo, result);
if (saved_prompt_on_quit)
ci.SetPromptOnQuit(true);
if (result.GetStatus() == lldb::eReturnStatusQuit) {
did_quit = true;
io_handler.SetIsDone(true);
if (debugger.CheckTopIOHandlerTypes(
IOHandler::Type::REPL, IOHandler::Type::CommandInterpreter)) {
// We typed "quit" or an alias to quit so we need to check if the
// command interpreter is above us and tell it that it is done as
// well
// so we don't drop back into the command interpreter if we have
// already
// quit
lldb::IOHandlerSP io_handler_sp(ci.GetIOHandler());
if (io_handler_sp)
io_handler_sp->SetIsDone(true);
}
}
} else {
// ":" was followed by no arguments, so push the LLDB command prompt
if (debugger.CheckTopIOHandlerTypes(
IOHandler::Type::REPL, IOHandler::Type::CommandInterpreter)) {
// If the user wants to get back to the command interpreter and the
// command interpreter is what launched the REPL, then just let the
// REPL exit and fall back to the command interpreter.
io_handler.SetIsDone(true);
} else {
// The REPL wasn't launched the by the command interpreter, it is the
// base IOHandler, so we need to get the command interpreter and
lldb::IOHandlerSP io_handler_sp(ci.GetIOHandler());
if (io_handler_sp) {
io_handler_sp->SetIsDone(false);
debugger.PushIOHandler(ci.GetIOHandler());
}
}
}
} else {
// Unwind any expression we might have been running in case our REPL
// expression crashed and the user was looking around
if (m_dedicated_repl_mode) {
Thread *thread = exe_ctx.GetThreadPtr();
if (thread && thread->UnwindInnermostExpression().Success()) {
thread->SetSelectedFrameByIndex(0, false);
exe_ctx.SetFrameSP(thread->GetSelectedFrame());
}
}
const bool colorize_err = error_sp->GetFile().GetIsTerminalWithColors();
EvaluateExpressionOptions expr_options;
expr_options.SetCoerceToId(m_varobj_options.use_objc);
expr_options.SetUnwindOnError(m_command_options.unwind_on_error);
expr_options.SetIgnoreBreakpoints(m_command_options.ignore_breakpoints);
expr_options.SetKeepInMemory(true);
expr_options.SetUseDynamic(m_varobj_options.use_dynamic);
expr_options.SetTryAllThreads(m_command_options.try_all_threads);
expr_options.SetGenerateDebugInfo(true);
expr_options.SetREPLEnabled(true);
expr_options.SetColorizeErrors(colorize_err);
expr_options.SetPoundLine(m_repl_source_path.c_str(),
m_code.GetSize() + 1);
if (m_command_options.timeout > 0)
expr_options.SetTimeout(std::chrono::microseconds(m_command_options.timeout));
else
expr_options.SetTimeout(llvm::None);
expr_options.SetLanguage(GetLanguage());
PersistentExpressionState *persistent_state =
m_target.GetPersistentExpressionStateForLanguage(GetLanguage());
const size_t var_count_before = persistent_state->GetSize();
const char *expr_prefix = nullptr;
lldb::ValueObjectSP result_valobj_sp;
Error error;
lldb::ModuleSP jit_module_sp;
lldb::ExpressionResults execution_results =
UserExpression::Evaluate(exe_ctx, expr_options, code.c_str(),
expr_prefix, result_valobj_sp, error,
0, // Line offset
nullptr, // Fixed Expression
&jit_module_sp);
// CommandInterpreter &ci = debugger.GetCommandInterpreter();
if (process_sp && process_sp->IsAlive()) {
bool add_to_code = true;
bool handled = false;
if (result_valobj_sp) {
lldb::Format format = m_format_options.GetFormat();
if (result_valobj_sp->GetError().Success()) {
handled |= PrintOneVariable(debugger, output_sp, result_valobj_sp);
} else if (result_valobj_sp->GetError().GetError() ==
UserExpression::kNoResult) {
if (format != lldb::eFormatVoid && debugger.GetNotifyVoid()) {
error_sp->PutCString("(void)\n");
handled = true;
}
}
}
if (debugger.GetPrintDecls()) {
for (size_t vi = var_count_before, ve = persistent_state->GetSize();
vi != ve; ++vi) {
lldb::ExpressionVariableSP persistent_var_sp =
persistent_state->GetVariableAtIndex(vi);
lldb::ValueObjectSP valobj_sp = persistent_var_sp->GetValueObject();
PrintOneVariable(debugger, output_sp, valobj_sp,
persistent_var_sp.get());
}
}
if (!handled) {
bool useColors = error_sp->GetFile().GetIsTerminalWithColors();
switch (execution_results) {
case lldb::eExpressionSetupError:
case lldb::eExpressionParseError:
add_to_code = false;
LLVM_FALLTHROUGH;
case lldb::eExpressionDiscarded:
error_sp->Printf("%s\n", error.AsCString());
break;
case lldb::eExpressionCompleted:
break;
case lldb::eExpressionInterrupted:
if (useColors) {
error_sp->Printf(ANSI_ESCAPE1(ANSI_FG_COLOR_RED));
error_sp->Printf(ANSI_ESCAPE1(ANSI_CTRL_BOLD));
}
error_sp->Printf("Execution interrupted. ");
if (useColors)
error_sp->Printf(ANSI_ESCAPE1(ANSI_CTRL_NORMAL));
error_sp->Printf("Enter code to recover and continue.\nEnter LLDB "
"commands to investigate (type :help for "
"assistance.)\n");
break;
case lldb::eExpressionHitBreakpoint:
// Breakpoint was hit, drop into LLDB command interpreter
if (useColors) {
error_sp->Printf(ANSI_ESCAPE1(ANSI_FG_COLOR_RED));
error_sp->Printf(ANSI_ESCAPE1(ANSI_CTRL_BOLD));
}
output_sp->Printf("Execution stopped at breakpoint. ");
if (useColors)
error_sp->Printf(ANSI_ESCAPE1(ANSI_CTRL_NORMAL));
output_sp->Printf("Enter LLDB commands to investigate (type help "
"for assistance.)\n");
{
lldb::IOHandlerSP io_handler_sp(ci.GetIOHandler());
if (io_handler_sp) {
io_handler_sp->SetIsDone(false);
debugger.PushIOHandler(ci.GetIOHandler());
}
}
break;
case lldb::eExpressionTimedOut:
error_sp->Printf("error: timeout\n");
if (error.AsCString())
error_sp->Printf("error: %s\n", error.AsCString());
break;
case lldb::eExpressionResultUnavailable:
// Shoulnd't happen???
error_sp->Printf("error: could not fetch result -- %s\n",
error.AsCString());
break;
case lldb::eExpressionStoppedForDebug:
// Shoulnd't happen???
error_sp->Printf("error: stopped for debug -- %s\n",
error.AsCString());
break;
}
}
if (add_to_code) {
const uint32_t new_default_line = m_code.GetSize() + 1;
m_code.SplitIntoLines(code);
// Update our code on disk
if (!m_repl_source_path.empty()) {
lldb_private::File file(m_repl_source_path.c_str(),
File::eOpenOptionWrite |
File::eOpenOptionTruncate |
File::eOpenOptionCanCreate,
lldb::eFilePermissionsFileDefault);
std::string code(m_code.CopyList());
code.append(1, '\n');
size_t bytes_written = code.size();
file.Write(code.c_str(), bytes_written);
file.Close();
// Now set the default file and line to the REPL source file
m_target.GetSourceManager().SetDefaultFileAndLine(
FileSpec(m_repl_source_path, false), new_default_line);
}
static_cast<IOHandlerEditline &>(io_handler)
.SetBaseLineNumber(m_code.GetSize() + 1);
}
if (extra_line) {
fprintf(output_sp->GetFile().GetStream(), "\n");
}
}
}
// Don't complain about the REPL process going away if we are in the process
// of quitting.
if (!did_quit && (!process_sp || !process_sp->IsAlive())) {
error_sp->Printf(
"error: REPL process is no longer alive, exiting REPL\n");
io_handler.SetIsDone(true);
}
}
}