1//===-- CommandObjectExpression.cpp ---------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#include "llvm/ADT/StringRef.h" 10 11#include "CommandObjectExpression.h" 12#include "lldb/Core/Debugger.h" 13#include "lldb/Expression/ExpressionVariable.h" 14#include "lldb/Expression/REPL.h" 15#include "lldb/Expression/UserExpression.h" 16#include "lldb/Host/OptionParser.h" 17#include "lldb/Interpreter/CommandInterpreter.h" 18#include "lldb/Interpreter/CommandOptionArgumentTable.h" 19#include "lldb/Interpreter/CommandReturnObject.h" 20#include "lldb/Interpreter/OptionArgParser.h" 21#include "lldb/Target/Language.h" 22#include "lldb/Target/Process.h" 23#include "lldb/Target/StackFrame.h" 24#include "lldb/Target/Target.h" 25#include "lldb/lldb-enumerations.h" 26#include "lldb/lldb-private-enumerations.h" 27 28using namespace lldb; 29using namespace lldb_private; 30 31CommandObjectExpression::CommandOptions::CommandOptions() = default; 32 33CommandObjectExpression::CommandOptions::~CommandOptions() = default; 34 35#define LLDB_OPTIONS_expression 36#include "CommandOptions.inc" 37 38Status CommandObjectExpression::CommandOptions::SetOptionValue( 39 uint32_t option_idx, llvm::StringRef option_arg, 40 ExecutionContext *execution_context) { 41 Status error; 42 43 const int short_option = GetDefinitions()[option_idx].short_option; 44 45 switch (short_option) { 46 case 'l': 47 language = Language::GetLanguageTypeFromString(option_arg); 48 if (language == eLanguageTypeUnknown) { 49 StreamString sstr; 50 sstr.Printf("unknown language type: '%s' for expression. " 51 "List of supported languages:\n", 52 option_arg.str().c_str()); 53 54 Language::PrintSupportedLanguagesForExpressions(sstr, " ", "\n"); 55 error.SetErrorString(sstr.GetString()); 56 } 57 break; 58 59 case 'a': { 60 bool success; 61 bool result; 62 result = OptionArgParser::ToBoolean(option_arg, true, &success); 63 if (!success) 64 error.SetErrorStringWithFormat( 65 "invalid all-threads value setting: \"%s\"", 66 option_arg.str().c_str()); 67 else 68 try_all_threads = result; 69 } break; 70 71 case 'i': { 72 bool success; 73 bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success); 74 if (success) 75 ignore_breakpoints = tmp_value; 76 else 77 error.SetErrorStringWithFormat( 78 "could not convert \"%s\" to a boolean value.", 79 option_arg.str().c_str()); 80 break; 81 } 82 83 case 'j': { 84 bool success; 85 bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success); 86 if (success) 87 allow_jit = tmp_value; 88 else 89 error.SetErrorStringWithFormat( 90 "could not convert \"%s\" to a boolean value.", 91 option_arg.str().c_str()); 92 break; 93 } 94 95 case 't': 96 if (option_arg.getAsInteger(0, timeout)) { 97 timeout = 0; 98 error.SetErrorStringWithFormat("invalid timeout setting \"%s\"", 99 option_arg.str().c_str()); 100 } 101 break; 102 103 case 'u': { 104 bool success; 105 bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success); 106 if (success) 107 unwind_on_error = tmp_value; 108 else 109 error.SetErrorStringWithFormat( 110 "could not convert \"%s\" to a boolean value.", 111 option_arg.str().c_str()); 112 break; 113 } 114 115 case 'v': 116 if (option_arg.empty()) { 117 m_verbosity = eLanguageRuntimeDescriptionDisplayVerbosityFull; 118 break; 119 } 120 m_verbosity = (LanguageRuntimeDescriptionDisplayVerbosity) 121 OptionArgParser::ToOptionEnum( 122 option_arg, GetDefinitions()[option_idx].enum_values, 0, error); 123 if (!error.Success()) 124 error.SetErrorStringWithFormat( 125 "unrecognized value for description-verbosity '%s'", 126 option_arg.str().c_str()); 127 break; 128 129 case 'g': 130 debug = true; 131 unwind_on_error = false; 132 ignore_breakpoints = false; 133 break; 134 135 case 'p': 136 top_level = true; 137 break; 138 139 case 'X': { 140 bool success; 141 bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success); 142 if (success) 143 auto_apply_fixits = tmp_value ? eLazyBoolYes : eLazyBoolNo; 144 else 145 error.SetErrorStringWithFormat( 146 "could not convert \"%s\" to a boolean value.", 147 option_arg.str().c_str()); 148 break; 149 } 150 151 case '\x01': { 152 bool success; 153 bool persist_result = 154 OptionArgParser::ToBoolean(option_arg, true, &success); 155 if (success) 156 suppress_persistent_result = !persist_result ? eLazyBoolYes : eLazyBoolNo; 157 else 158 error.SetErrorStringWithFormat( 159 "could not convert \"%s\" to a boolean value.", 160 option_arg.str().c_str()); 161 break; 162 } 163 164 default: 165 llvm_unreachable("Unimplemented option"); 166 } 167 168 return error; 169} 170 171void CommandObjectExpression::CommandOptions::OptionParsingStarting( 172 ExecutionContext *execution_context) { 173 auto process_sp = 174 execution_context ? execution_context->GetProcessSP() : ProcessSP(); 175 if (process_sp) { 176 ignore_breakpoints = process_sp->GetIgnoreBreakpointsInExpressions(); 177 unwind_on_error = process_sp->GetUnwindOnErrorInExpressions(); 178 } else { 179 ignore_breakpoints = true; 180 unwind_on_error = true; 181 } 182 183 show_summary = true; 184 try_all_threads = true; 185 timeout = 0; 186 debug = false; 187 language = eLanguageTypeUnknown; 188 m_verbosity = eLanguageRuntimeDescriptionDisplayVerbosityCompact; 189 auto_apply_fixits = eLazyBoolCalculate; 190 top_level = false; 191 allow_jit = true; 192 suppress_persistent_result = eLazyBoolCalculate; 193} 194 195llvm::ArrayRef<OptionDefinition> 196CommandObjectExpression::CommandOptions::GetDefinitions() { 197 return llvm::ArrayRef(g_expression_options); 198} 199 200EvaluateExpressionOptions 201CommandObjectExpression::CommandOptions::GetEvaluateExpressionOptions( 202 const Target &target, const OptionGroupValueObjectDisplay &display_opts) { 203 EvaluateExpressionOptions options; 204 options.SetCoerceToId(display_opts.use_objc); 205 options.SetUnwindOnError(unwind_on_error); 206 options.SetIgnoreBreakpoints(ignore_breakpoints); 207 options.SetKeepInMemory(true); 208 options.SetUseDynamic(display_opts.use_dynamic); 209 options.SetTryAllThreads(try_all_threads); 210 options.SetDebug(debug); 211 options.SetLanguage(language); 212 options.SetExecutionPolicy( 213 allow_jit ? EvaluateExpressionOptions::default_execution_policy 214 : lldb_private::eExecutionPolicyNever); 215 216 bool auto_apply_fixits; 217 if (this->auto_apply_fixits == eLazyBoolCalculate) 218 auto_apply_fixits = target.GetEnableAutoApplyFixIts(); 219 else 220 auto_apply_fixits = this->auto_apply_fixits == eLazyBoolYes; 221 222 options.SetAutoApplyFixIts(auto_apply_fixits); 223 options.SetRetriesWithFixIts(target.GetNumberOfRetriesWithFixits()); 224 225 if (top_level) 226 options.SetExecutionPolicy(eExecutionPolicyTopLevel); 227 228 // If there is any chance we are going to stop and want to see what went 229 // wrong with our expression, we should generate debug info 230 if (!ignore_breakpoints || !unwind_on_error) 231 options.SetGenerateDebugInfo(true); 232 233 if (timeout > 0) 234 options.SetTimeout(std::chrono::microseconds(timeout)); 235 else 236 options.SetTimeout(std::nullopt); 237 return options; 238} 239 240bool CommandObjectExpression::CommandOptions::ShouldSuppressResult( 241 const OptionGroupValueObjectDisplay &display_opts) const { 242 // Explicitly disabling persistent results takes precedence over the 243 // m_verbosity/use_objc logic. 244 if (suppress_persistent_result != eLazyBoolCalculate) 245 return suppress_persistent_result == eLazyBoolYes; 246 247 return display_opts.use_objc && 248 m_verbosity == eLanguageRuntimeDescriptionDisplayVerbosityCompact; 249} 250 251CommandObjectExpression::CommandObjectExpression( 252 CommandInterpreter &interpreter) 253 : CommandObjectRaw(interpreter, "expression", 254 "Evaluate an expression on the current " 255 "thread. Displays any returned value " 256 "with LLDB's default formatting.", 257 "", 258 eCommandProcessMustBePaused | eCommandTryTargetAPILock), 259 IOHandlerDelegate(IOHandlerDelegate::Completion::Expression), 260 m_format_options(eFormatDefault), 261 m_repl_option(LLDB_OPT_SET_1, false, "repl", 'r', "Drop into REPL", false, 262 true), 263 m_expr_line_count(0) { 264 SetHelpLong( 265 R"( 266Single and multi-line expressions: 267 268)" 269 " The expression provided on the command line must be a complete expression \ 270with no newlines. To evaluate a multi-line expression, \ 271hit a return after an empty expression, and lldb will enter the multi-line expression editor. \ 272Hit return on an empty line to end the multi-line expression." 273 274 R"( 275 276Timeouts: 277 278)" 279 " If the expression can be evaluated statically (without running code) then it will be. \ 280Otherwise, by default the expression will run on the current thread with a short timeout: \ 281currently .25 seconds. If it doesn't return in that time, the evaluation will be interrupted \ 282and resumed with all threads running. You can use the -a option to disable retrying on all \ 283threads. You can use the -t option to set a shorter timeout." 284 R"( 285 286User defined variables: 287 288)" 289 " You can define your own variables for convenience or to be used in subsequent expressions. \ 290You define them the same way you would define variables in C. If the first character of \ 291your user defined variable is a $, then the variable's value will be available in future \ 292expressions, otherwise it will just be available in the current expression." 293 R"( 294 295Continuing evaluation after a breakpoint: 296 297)" 298 " If the \"-i false\" option is used, and execution is interrupted by a breakpoint hit, once \ 299you are done with your investigation, you can either remove the expression execution frames \ 300from the stack with \"thread return -x\" or if you are still interested in the expression result \ 301you can issue the \"continue\" command and the expression evaluation will complete and the \ 302expression result will be available using the \"thread.completed-expression\" key in the thread \ 303format." 304 305 R"( 306 307Examples: 308 309 expr my_struct->a = my_array[3] 310 expr -f bin -- (index * 8) + 5 311 expr unsigned int $foo = 5 312 expr char c[] = \"foo\"; c[0])"); 313 314 CommandArgumentEntry arg; 315 CommandArgumentData expression_arg; 316 317 // Define the first (and only) variant of this arg. 318 expression_arg.arg_type = eArgTypeExpression; 319 expression_arg.arg_repetition = eArgRepeatPlain; 320 321 // There is only one variant this argument could be; put it into the argument 322 // entry. 323 arg.push_back(expression_arg); 324 325 // Push the data for the first argument into the m_arguments vector. 326 m_arguments.push_back(arg); 327 328 // Add the "--format" and "--gdb-format" 329 m_option_group.Append(&m_format_options, 330 OptionGroupFormat::OPTION_GROUP_FORMAT | 331 OptionGroupFormat::OPTION_GROUP_GDB_FMT, 332 LLDB_OPT_SET_1); 333 m_option_group.Append(&m_command_options); 334 m_option_group.Append(&m_varobj_options, LLDB_OPT_SET_ALL, 335 LLDB_OPT_SET_1 | LLDB_OPT_SET_2); 336 m_option_group.Append(&m_repl_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_3); 337 m_option_group.Finalize(); 338} 339 340CommandObjectExpression::~CommandObjectExpression() = default; 341 342Options *CommandObjectExpression::GetOptions() { return &m_option_group; } 343 344void CommandObjectExpression::HandleCompletion(CompletionRequest &request) { 345 EvaluateExpressionOptions options; 346 options.SetCoerceToId(m_varobj_options.use_objc); 347 options.SetLanguage(m_command_options.language); 348 options.SetExecutionPolicy(lldb_private::eExecutionPolicyNever); 349 options.SetAutoApplyFixIts(false); 350 options.SetGenerateDebugInfo(false); 351 352 ExecutionContext exe_ctx(m_interpreter.GetExecutionContext()); 353 354 // Get out before we start doing things that expect a valid frame pointer. 355 if (exe_ctx.GetFramePtr() == nullptr) 356 return; 357 358 Target *exe_target = exe_ctx.GetTargetPtr(); 359 Target &target = exe_target ? *exe_target : GetDummyTarget(); 360 361 unsigned cursor_pos = request.GetRawCursorPos(); 362 // Get the full user input including the suffix. The suffix is necessary 363 // as OptionsWithRaw will use it to detect if the cursor is cursor is in the 364 // argument part of in the raw input part of the arguments. If we cut of 365 // of the suffix then "expr -arg[cursor] --" would interpret the "-arg" as 366 // the raw input (as the "--" is hidden in the suffix). 367 llvm::StringRef code = request.GetRawLineWithUnusedSuffix(); 368 369 const std::size_t original_code_size = code.size(); 370 371 // Remove the first token which is 'expr' or some alias/abbreviation of that. 372 code = llvm::getToken(code).second.ltrim(); 373 OptionsWithRaw args(code); 374 code = args.GetRawPart(); 375 376 // The position where the expression starts in the command line. 377 assert(original_code_size >= code.size()); 378 std::size_t raw_start = original_code_size - code.size(); 379 380 // Check if the cursor is actually in the expression string, and if not, we 381 // exit. 382 // FIXME: We should complete the options here. 383 if (cursor_pos < raw_start) 384 return; 385 386 // Make the cursor_pos again relative to the start of the code string. 387 assert(cursor_pos >= raw_start); 388 cursor_pos -= raw_start; 389 390 auto language = exe_ctx.GetFrameRef().GetLanguage(); 391 392 Status error; 393 lldb::UserExpressionSP expr(target.GetUserExpressionForLanguage( 394 code, llvm::StringRef(), language, UserExpression::eResultTypeAny, 395 options, nullptr, error)); 396 if (error.Fail()) 397 return; 398 399 expr->Complete(exe_ctx, request, cursor_pos); 400} 401 402static lldb_private::Status 403CanBeUsedForElementCountPrinting(ValueObject &valobj) { 404 CompilerType type(valobj.GetCompilerType()); 405 CompilerType pointee; 406 if (!type.IsPointerType(&pointee)) 407 return Status("as it does not refer to a pointer"); 408 if (pointee.IsVoidType()) 409 return Status("as it refers to a pointer to void"); 410 return Status(); 411} 412 413bool CommandObjectExpression::EvaluateExpression(llvm::StringRef expr, 414 Stream &output_stream, 415 Stream &error_stream, 416 CommandReturnObject &result) { 417 // Don't use m_exe_ctx as this might be called asynchronously after the 418 // command object DoExecute has finished when doing multi-line expression 419 // that use an input reader... 420 ExecutionContext exe_ctx(m_interpreter.GetExecutionContext()); 421 Target *exe_target = exe_ctx.GetTargetPtr(); 422 Target &target = exe_target ? *exe_target : GetDummyTarget(); 423 424 lldb::ValueObjectSP result_valobj_sp; 425 StackFrame *frame = exe_ctx.GetFramePtr(); 426 427 if (m_command_options.top_level && !m_command_options.allow_jit) { 428 result.AppendErrorWithFormat( 429 "Can't disable JIT compilation for top-level expressions.\n"); 430 return false; 431 } 432 433 EvaluateExpressionOptions eval_options = 434 m_command_options.GetEvaluateExpressionOptions(target, m_varobj_options); 435 // This command manually removes the result variable, make sure expression 436 // evaluation doesn't do it first. 437 eval_options.SetSuppressPersistentResult(false); 438 439 ExpressionResults success = target.EvaluateExpression( 440 expr, frame, result_valobj_sp, eval_options, &m_fixed_expression); 441 442 // Only mention Fix-Its if the expression evaluator applied them. 443 // Compiler errors refer to the final expression after applying Fix-It(s). 444 if (!m_fixed_expression.empty() && target.GetEnableNotifyAboutFixIts()) { 445 error_stream << " Evaluated this expression after applying Fix-It(s):\n"; 446 error_stream << " " << m_fixed_expression << "\n"; 447 } 448 449 if (result_valobj_sp) { 450 Format format = m_format_options.GetFormat(); 451 452 if (result_valobj_sp->GetError().Success()) { 453 if (format != eFormatVoid) { 454 if (format != eFormatDefault) 455 result_valobj_sp->SetFormat(format); 456 457 if (m_varobj_options.elem_count > 0) { 458 Status error(CanBeUsedForElementCountPrinting(*result_valobj_sp)); 459 if (error.Fail()) { 460 result.AppendErrorWithFormat( 461 "expression cannot be used with --element-count %s\n", 462 error.AsCString("")); 463 return false; 464 } 465 } 466 467 bool suppress_result = 468 m_command_options.ShouldSuppressResult(m_varobj_options); 469 470 DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions( 471 m_command_options.m_verbosity, format)); 472 options.SetHideRootName(suppress_result); 473 options.SetVariableFormatDisplayLanguage( 474 result_valobj_sp->GetPreferredDisplayLanguage()); 475 476 result_valobj_sp->Dump(output_stream, options); 477 478 if (suppress_result) 479 if (auto result_var_sp = 480 target.GetPersistentVariable(result_valobj_sp->GetName())) { 481 auto language = result_valobj_sp->GetPreferredDisplayLanguage(); 482 if (auto *persistent_state = 483 target.GetPersistentExpressionStateForLanguage(language)) 484 persistent_state->RemovePersistentVariable(result_var_sp); 485 } 486 result.SetStatus(eReturnStatusSuccessFinishResult); 487 } 488 } else { 489 if (result_valobj_sp->GetError().GetError() == 490 UserExpression::kNoResult) { 491 if (format != eFormatVoid && GetDebugger().GetNotifyVoid()) { 492 error_stream.PutCString("(void)\n"); 493 } 494 495 result.SetStatus(eReturnStatusSuccessFinishResult); 496 } else { 497 const char *error_cstr = result_valobj_sp->GetError().AsCString(); 498 if (error_cstr && error_cstr[0]) { 499 const size_t error_cstr_len = strlen(error_cstr); 500 const bool ends_with_newline = error_cstr[error_cstr_len - 1] == '\n'; 501 if (strstr(error_cstr, "error:") != error_cstr) 502 error_stream.PutCString("error: "); 503 error_stream.Write(error_cstr, error_cstr_len); 504 if (!ends_with_newline) 505 error_stream.EOL(); 506 } else { 507 error_stream.PutCString("error: unknown error\n"); 508 } 509 510 result.SetStatus(eReturnStatusFailed); 511 } 512 } 513 } else { 514 error_stream.Printf("error: unknown error\n"); 515 } 516 517 return (success != eExpressionSetupError && 518 success != eExpressionParseError); 519} 520 521void CommandObjectExpression::IOHandlerInputComplete(IOHandler &io_handler, 522 std::string &line) { 523 io_handler.SetIsDone(true); 524 StreamFileSP output_sp = io_handler.GetOutputStreamFileSP(); 525 StreamFileSP error_sp = io_handler.GetErrorStreamFileSP(); 526 527 CommandReturnObject return_obj( 528 GetCommandInterpreter().GetDebugger().GetUseColor()); 529 EvaluateExpression(line.c_str(), *output_sp, *error_sp, return_obj); 530 if (output_sp) 531 output_sp->Flush(); 532 if (error_sp) 533 error_sp->Flush(); 534} 535 536bool CommandObjectExpression::IOHandlerIsInputComplete(IOHandler &io_handler, 537 StringList &lines) { 538 // An empty lines is used to indicate the end of input 539 const size_t num_lines = lines.GetSize(); 540 if (num_lines > 0 && lines[num_lines - 1].empty()) { 541 // Remove the last empty line from "lines" so it doesn't appear in our 542 // resulting input and return true to indicate we are done getting lines 543 lines.PopBack(); 544 return true; 545 } 546 return false; 547} 548 549void CommandObjectExpression::GetMultilineExpression() { 550 m_expr_lines.clear(); 551 m_expr_line_count = 0; 552 553 Debugger &debugger = GetCommandInterpreter().GetDebugger(); 554 bool color_prompt = debugger.GetUseColor(); 555 const bool multiple_lines = true; // Get multiple lines 556 IOHandlerSP io_handler_sp( 557 new IOHandlerEditline(debugger, IOHandler::Type::Expression, 558 "lldb-expr", // Name of input reader for history 559 llvm::StringRef(), // No prompt 560 llvm::StringRef(), // Continuation prompt 561 multiple_lines, color_prompt, 562 1, // Show line numbers starting at 1 563 *this)); 564 565 StreamFileSP output_sp = io_handler_sp->GetOutputStreamFileSP(); 566 if (output_sp) { 567 output_sp->PutCString( 568 "Enter expressions, then terminate with an empty line to evaluate:\n"); 569 output_sp->Flush(); 570 } 571 debugger.RunIOHandlerAsync(io_handler_sp); 572} 573 574static EvaluateExpressionOptions 575GetExprOptions(ExecutionContext &ctx, 576 CommandObjectExpression::CommandOptions command_options) { 577 command_options.OptionParsingStarting(&ctx); 578 579 // Default certain settings for REPL regardless of the global settings. 580 command_options.unwind_on_error = false; 581 command_options.ignore_breakpoints = false; 582 command_options.debug = false; 583 584 EvaluateExpressionOptions expr_options; 585 expr_options.SetUnwindOnError(command_options.unwind_on_error); 586 expr_options.SetIgnoreBreakpoints(command_options.ignore_breakpoints); 587 expr_options.SetTryAllThreads(command_options.try_all_threads); 588 589 if (command_options.timeout > 0) 590 expr_options.SetTimeout(std::chrono::microseconds(command_options.timeout)); 591 else 592 expr_options.SetTimeout(std::nullopt); 593 594 return expr_options; 595} 596 597void CommandObjectExpression::DoExecute(llvm::StringRef command, 598 CommandReturnObject &result) { 599 m_fixed_expression.clear(); 600 auto exe_ctx = GetCommandInterpreter().GetExecutionContext(); 601 m_option_group.NotifyOptionParsingStarting(&exe_ctx); 602 603 if (command.empty()) { 604 GetMultilineExpression(); 605 return; 606 } 607 608 OptionsWithRaw args(command); 609 llvm::StringRef expr = args.GetRawPart(); 610 611 if (args.HasArgs()) { 612 if (!ParseOptionsAndNotify(args.GetArgs(), result, m_option_group, exe_ctx)) 613 return; 614 615 if (m_repl_option.GetOptionValue().GetCurrentValue()) { 616 Target &target = GetSelectedOrDummyTarget(); 617 // Drop into REPL 618 m_expr_lines.clear(); 619 m_expr_line_count = 0; 620 621 Debugger &debugger = target.GetDebugger(); 622 623 // Check if the LLDB command interpreter is sitting on top of a REPL 624 // that launched it... 625 if (debugger.CheckTopIOHandlerTypes(IOHandler::Type::CommandInterpreter, 626 IOHandler::Type::REPL)) { 627 // the LLDB command interpreter is sitting on top of a REPL that 628 // launched it, so just say the command interpreter is done and 629 // fall back to the existing REPL 630 m_interpreter.GetIOHandler(false)->SetIsDone(true); 631 } else { 632 // We are launching the REPL on top of the current LLDB command 633 // interpreter, so just push one 634 bool initialize = false; 635 Status repl_error; 636 REPLSP repl_sp(target.GetREPL(repl_error, m_command_options.language, 637 nullptr, false)); 638 639 if (!repl_sp) { 640 initialize = true; 641 repl_sp = target.GetREPL(repl_error, m_command_options.language, 642 nullptr, true); 643 if (!repl_error.Success()) { 644 result.SetError(repl_error); 645 return; 646 } 647 } 648 649 if (repl_sp) { 650 if (initialize) { 651 repl_sp->SetEvaluateOptions( 652 GetExprOptions(exe_ctx, m_command_options)); 653 repl_sp->SetFormatOptions(m_format_options); 654 repl_sp->SetValueObjectDisplayOptions(m_varobj_options); 655 } 656 657 IOHandlerSP io_handler_sp(repl_sp->GetIOHandler()); 658 io_handler_sp->SetIsDone(false); 659 debugger.RunIOHandlerAsync(io_handler_sp); 660 } else { 661 repl_error.SetErrorStringWithFormat( 662 "Couldn't create a REPL for %s", 663 Language::GetNameForLanguageType(m_command_options.language)); 664 result.SetError(repl_error); 665 return; 666 } 667 } 668 } 669 // No expression following options 670 else if (expr.empty()) { 671 GetMultilineExpression(); 672 return; 673 } 674 } 675 676 Target &target = GetSelectedOrDummyTarget(); 677 if (EvaluateExpression(expr, result.GetOutputStream(), 678 result.GetErrorStream(), result)) { 679 680 if (!m_fixed_expression.empty() && target.GetEnableNotifyAboutFixIts()) { 681 CommandHistory &history = m_interpreter.GetCommandHistory(); 682 // FIXME: Can we figure out what the user actually typed (e.g. some alias 683 // for expr???) 684 // If we can it would be nice to show that. 685 std::string fixed_command("expression "); 686 if (args.HasArgs()) { 687 // Add in any options that might have been in the original command: 688 fixed_command.append(std::string(args.GetArgStringWithDelimiter())); 689 fixed_command.append(m_fixed_expression); 690 } else 691 fixed_command.append(m_fixed_expression); 692 history.AppendString(fixed_command); 693 } 694 return; 695 } 696 result.SetStatus(eReturnStatusFailed); 697} 698