1 //===-- CommandObjectFrame.cpp ----------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "CommandObjectFrame.h" 11 12 // C Includes 13 // C++ Includes 14 // Other libraries and framework includes 15 // Project includes 16 #include "lldb/Core/Debugger.h" 17 #include "lldb/Core/Module.h" 18 #include "lldb/Core/StreamFile.h" 19 #include "lldb/Core/Timer.h" 20 #include "lldb/Core/Value.h" 21 #include "lldb/Core/ValueObject.h" 22 #include "lldb/Core/ValueObjectVariable.h" 23 #include "lldb/Host/Host.h" 24 #include "lldb/Interpreter/Args.h" 25 #include "lldb/Interpreter/CommandInterpreter.h" 26 #include "lldb/Interpreter/CommandReturnObject.h" 27 #include "lldb/Interpreter/Options.h" 28 #include "lldb/Interpreter/OptionGroupValueObjectDisplay.h" 29 #include "lldb/Interpreter/OptionGroupVariable.h" 30 #include "lldb/Symbol/ClangASTType.h" 31 #include "lldb/Symbol/ClangASTContext.h" 32 #include "lldb/Symbol/ObjectFile.h" 33 #include "lldb/Symbol/SymbolContext.h" 34 #include "lldb/Symbol/Type.h" 35 #include "lldb/Symbol/Variable.h" 36 #include "lldb/Symbol/VariableList.h" 37 #include "lldb/Target/Process.h" 38 #include "lldb/Target/StackFrame.h" 39 #include "lldb/Target/Thread.h" 40 #include "lldb/Target/Target.h" 41 42 using namespace lldb; 43 using namespace lldb_private; 44 45 #pragma mark CommandObjectFrameInfo 46 47 //------------------------------------------------------------------------- 48 // CommandObjectFrameInfo 49 //------------------------------------------------------------------------- 50 51 class CommandObjectFrameInfo : public CommandObject 52 { 53 public: 54 55 CommandObjectFrameInfo (CommandInterpreter &interpreter) : 56 CommandObject (interpreter, 57 "frame info", 58 "List information about the currently selected frame in the current thread.", 59 "frame info", 60 eFlagProcessMustBeLaunched | eFlagProcessMustBePaused) 61 { 62 } 63 64 ~CommandObjectFrameInfo () 65 { 66 } 67 68 bool 69 Execute (Args& command, 70 CommandReturnObject &result) 71 { 72 ExecutionContext exe_ctx(m_interpreter.GetExecutionContext()); 73 if (exe_ctx.frame) 74 { 75 exe_ctx.frame->DumpUsingSettingsFormat (&result.GetOutputStream()); 76 result.SetStatus (eReturnStatusSuccessFinishResult); 77 } 78 else 79 { 80 result.AppendError ("no current frame"); 81 result.SetStatus (eReturnStatusFailed); 82 } 83 return result.Succeeded(); 84 } 85 }; 86 87 #pragma mark CommandObjectFrameSelect 88 89 //------------------------------------------------------------------------- 90 // CommandObjectFrameSelect 91 //------------------------------------------------------------------------- 92 93 class CommandObjectFrameSelect : public CommandObject 94 { 95 public: 96 97 class CommandOptions : public Options 98 { 99 public: 100 101 CommandOptions (CommandInterpreter &interpreter) : 102 Options(interpreter) 103 { 104 OptionParsingStarting (); 105 } 106 107 virtual 108 ~CommandOptions () 109 { 110 } 111 112 virtual Error 113 SetOptionValue (uint32_t option_idx, const char *option_arg) 114 { 115 Error error; 116 bool success = false; 117 char short_option = (char) m_getopt_table[option_idx].val; 118 switch (short_option) 119 { 120 case 'r': 121 relative_frame_offset = Args::StringToSInt32 (option_arg, INT32_MIN, 0, &success); 122 if (!success) 123 error.SetErrorStringWithFormat ("invalid frame offset argument '%s'.\n", option_arg); 124 break; 125 126 default: 127 error.SetErrorStringWithFormat ("Invalid short option character '%c'.\n", short_option); 128 break; 129 } 130 131 return error; 132 } 133 134 void 135 OptionParsingStarting () 136 { 137 relative_frame_offset = INT32_MIN; 138 } 139 140 const OptionDefinition* 141 GetDefinitions () 142 { 143 return g_option_table; 144 } 145 146 // Options table: Required for subclasses of Options. 147 148 static OptionDefinition g_option_table[]; 149 int32_t relative_frame_offset; 150 }; 151 152 CommandObjectFrameSelect (CommandInterpreter &interpreter) : 153 CommandObject (interpreter, 154 "frame select", 155 "Select a frame by index from within the current thread and make it the current frame.", 156 NULL, 157 eFlagProcessMustBeLaunched | eFlagProcessMustBePaused), 158 m_options (interpreter) 159 { 160 CommandArgumentEntry arg; 161 CommandArgumentData index_arg; 162 163 // Define the first (and only) variant of this arg. 164 index_arg.arg_type = eArgTypeFrameIndex; 165 index_arg.arg_repetition = eArgRepeatOptional; 166 167 // There is only one variant this argument could be; put it into the argument entry. 168 arg.push_back (index_arg); 169 170 // Push the data for the first argument into the m_arguments vector. 171 m_arguments.push_back (arg); 172 } 173 174 ~CommandObjectFrameSelect () 175 { 176 } 177 178 virtual 179 Options * 180 GetOptions () 181 { 182 return &m_options; 183 } 184 185 186 bool 187 Execute (Args& command, 188 CommandReturnObject &result) 189 { 190 ExecutionContext exe_ctx (m_interpreter.GetExecutionContext()); 191 if (exe_ctx.thread) 192 { 193 const uint32_t num_frames = exe_ctx.thread->GetStackFrameCount(); 194 uint32_t frame_idx = UINT32_MAX; 195 if (m_options.relative_frame_offset != INT32_MIN) 196 { 197 // The one and only argument is a signed relative frame index 198 frame_idx = exe_ctx.thread->GetSelectedFrameIndex (); 199 if (frame_idx == UINT32_MAX) 200 frame_idx = 0; 201 202 if (m_options.relative_frame_offset < 0) 203 { 204 if (frame_idx >= -m_options.relative_frame_offset) 205 frame_idx += m_options.relative_frame_offset; 206 else 207 frame_idx = 0; 208 } 209 else if (m_options.relative_frame_offset > 0) 210 { 211 if (num_frames - frame_idx > m_options.relative_frame_offset) 212 frame_idx += m_options.relative_frame_offset; 213 else 214 frame_idx = num_frames - 1; 215 } 216 } 217 else 218 { 219 if (command.GetArgumentCount() == 1) 220 { 221 const char *frame_idx_cstr = command.GetArgumentAtIndex(0); 222 frame_idx = Args::StringToUInt32 (frame_idx_cstr, UINT32_MAX, 0); 223 } 224 else 225 { 226 result.AppendError ("invalid arguments.\n"); 227 m_options.GenerateOptionUsage (result.GetErrorStream(), this); 228 } 229 } 230 231 if (frame_idx < num_frames) 232 { 233 exe_ctx.thread->SetSelectedFrameByIndex (frame_idx); 234 exe_ctx.frame = exe_ctx.thread->GetSelectedFrame ().get(); 235 236 if (exe_ctx.frame) 237 { 238 bool already_shown = false; 239 SymbolContext frame_sc(exe_ctx.frame->GetSymbolContext(eSymbolContextLineEntry)); 240 if (m_interpreter.GetDebugger().GetUseExternalEditor() && frame_sc.line_entry.file && frame_sc.line_entry.line != 0) 241 { 242 already_shown = Host::OpenFileInExternalEditor (frame_sc.line_entry.file, frame_sc.line_entry.line); 243 } 244 245 bool show_frame_info = true; 246 bool show_source = !already_shown; 247 uint32_t source_lines_before = 3; 248 uint32_t source_lines_after = 3; 249 if (exe_ctx.frame->GetStatus(result.GetOutputStream(), 250 show_frame_info, 251 show_source, 252 source_lines_before, 253 source_lines_after)) 254 { 255 result.SetStatus (eReturnStatusSuccessFinishResult); 256 return result.Succeeded(); 257 } 258 } 259 } 260 result.AppendErrorWithFormat ("Frame index (%u) out of range.\n", frame_idx); 261 } 262 else 263 { 264 result.AppendError ("no current thread"); 265 } 266 result.SetStatus (eReturnStatusFailed); 267 return false; 268 } 269 protected: 270 271 CommandOptions m_options; 272 }; 273 274 OptionDefinition 275 CommandObjectFrameSelect::CommandOptions::g_option_table[] = 276 { 277 { LLDB_OPT_SET_1, false, "relative", 'r', required_argument, NULL, 0, eArgTypeOffset, "A relative frame index offset from the current frame index."}, 278 { 0, false, NULL, 0, 0, NULL, NULL, eArgTypeNone, NULL } 279 }; 280 281 #pragma mark CommandObjectFrameVariable 282 //---------------------------------------------------------------------- 283 // List images with associated information 284 //---------------------------------------------------------------------- 285 class CommandObjectFrameVariable : public CommandObject 286 { 287 public: 288 289 class OptionGroupFrameVariable : public OptionGroup 290 { 291 public: 292 293 OptionGroupFrameVariable () 294 { 295 } 296 297 virtual 298 ~OptionGroupFrameVariable () 299 { 300 } 301 302 virtual uint32_t 303 GetNumDefinitions (); 304 305 virtual const OptionDefinition* 306 GetDefinitions () 307 { 308 return g_option_table; 309 } 310 311 virtual Error 312 SetOptionValue (CommandInterpreter &interpreter, 313 uint32_t option_idx, 314 const char *option_arg) 315 { 316 Error error; 317 char short_option = (char) g_option_table[option_idx].short_option; 318 switch (short_option) 319 { 320 case 'r': use_regex = true; break; 321 case 'a': show_args = false; break; 322 case 'l': show_locals = false; break; 323 case 'g': show_globals = true; break; 324 case 'c': show_decl = true; break; 325 case 'f': error = Args::StringToFormat(option_arg, format, NULL); break; 326 case 'G': 327 globals.push_back(ConstString (option_arg)); 328 break; 329 case 's': 330 show_scope = true; 331 break; 332 333 default: 334 error.SetErrorStringWithFormat("Invalid short option character '%c'.\n", short_option); 335 break; 336 } 337 338 return error; 339 } 340 341 virtual void 342 OptionParsingStarting (CommandInterpreter &interpreter) 343 { 344 show_args = true; 345 show_decl = false; 346 format = eFormatDefault; 347 show_globals = false; 348 show_locals = true; 349 use_regex = false; 350 show_scope = false; 351 globals.clear(); 352 } 353 354 // Options table: Required for subclasses of Options. 355 356 static OptionDefinition g_option_table[]; 357 358 bool use_regex:1, 359 show_args:1, 360 show_locals:1, 361 show_globals:1, 362 show_scope:1, 363 show_decl:1; 364 lldb::Format format; // The format to use when dumping variables or children of variables 365 std::vector<ConstString> globals; 366 // Instance variables to hold the values for command options. 367 }; 368 369 CommandObjectFrameVariable (CommandInterpreter &interpreter) : 370 CommandObject (interpreter, 371 "frame variable", 372 "Show frame variables. All argument and local variables " 373 "that are in scope will be shown when no arguments are given. " 374 "If any arguments are specified, they can be names of " 375 "argument, local, file static and file global variables. " 376 "Children of aggregate variables can be specified such as " 377 "'var->child.x'.", 378 NULL, 379 eFlagProcessMustBeLaunched | eFlagProcessMustBePaused), 380 m_option_group (interpreter), 381 m_option_variable(true), // Include the frame specific options by passing "true" 382 m_varobj_options() 383 { 384 CommandArgumentEntry arg; 385 CommandArgumentData var_name_arg; 386 387 // Define the first (and only) variant of this arg. 388 var_name_arg.arg_type = eArgTypeVarName; 389 var_name_arg.arg_repetition = eArgRepeatStar; 390 391 // There is only one variant this argument could be; put it into the argument entry. 392 arg.push_back (var_name_arg); 393 394 // Push the data for the first argument into the m_arguments vector. 395 m_arguments.push_back (arg); 396 397 m_option_group.Append (&m_option_variable, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 398 m_option_group.Append (&m_varobj_options, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1); 399 m_option_group.Finalize(); 400 } 401 402 virtual 403 ~CommandObjectFrameVariable () 404 { 405 } 406 407 virtual 408 Options * 409 GetOptions () 410 { 411 return &m_option_group; 412 } 413 414 415 virtual bool 416 Execute 417 ( 418 Args& command, 419 CommandReturnObject &result 420 ) 421 { 422 ExecutionContext exe_ctx(m_interpreter.GetExecutionContext()); 423 if (exe_ctx.frame == NULL) 424 { 425 result.AppendError ("you must be stopped in a valid stack frame to view frame variables."); 426 result.SetStatus (eReturnStatusFailed); 427 return false; 428 } 429 else 430 { 431 Stream &s = result.GetOutputStream(); 432 433 bool get_file_globals = true; 434 VariableList *variable_list = exe_ctx.frame->GetVariableList (get_file_globals); 435 436 VariableSP var_sp; 437 ValueObjectSP valobj_sp; 438 439 const char *name_cstr = NULL; 440 size_t idx; 441 442 SummaryFormatSP summary_format_sp; 443 if (!m_option_variable.summary.empty()) 444 Debugger::Formatting::NamedSummaryFormats::Get(ConstString(m_option_variable.summary.c_str()), summary_format_sp); 445 446 if (variable_list) 447 { 448 if (command.GetArgumentCount() > 0) 449 { 450 VariableList regex_var_list; 451 452 // If we have any args to the variable command, we will make 453 // variable objects from them... 454 for (idx = 0; (name_cstr = command.GetArgumentAtIndex(idx)) != NULL; ++idx) 455 { 456 uint32_t ptr_depth = m_varobj_options.ptr_depth; 457 458 if (m_option_variable.use_regex) 459 { 460 const uint32_t regex_start_index = regex_var_list.GetSize(); 461 RegularExpression regex (name_cstr); 462 if (regex.Compile(name_cstr)) 463 { 464 size_t num_matches = 0; 465 const size_t num_new_regex_vars = variable_list->AppendVariablesIfUnique(regex, 466 regex_var_list, 467 num_matches); 468 if (num_new_regex_vars > 0) 469 { 470 for (uint32_t regex_idx = regex_start_index, end_index = regex_var_list.GetSize(); 471 regex_idx < end_index; 472 ++regex_idx) 473 { 474 var_sp = regex_var_list.GetVariableAtIndex (regex_idx); 475 if (var_sp) 476 { 477 valobj_sp = exe_ctx.frame->GetValueObjectForFrameVariable (var_sp, m_varobj_options.use_dynamic); 478 if (valobj_sp) 479 { 480 if (m_option_variable.format != eFormatDefault) 481 valobj_sp->SetFormat (m_option_variable.format); 482 483 if (m_option_variable.show_decl && var_sp->GetDeclaration ().GetFile()) 484 { 485 bool show_fullpaths = false; 486 bool show_module = true; 487 if (var_sp->DumpDeclaration(&s, show_fullpaths, show_module)) 488 s.PutCString (": "); 489 } 490 if (summary_format_sp) 491 valobj_sp->SetCustomSummaryFormat(summary_format_sp); 492 ValueObject::DumpValueObject (result.GetOutputStream(), 493 valobj_sp.get(), 494 var_sp->GetName().AsCString(), 495 m_varobj_options.ptr_depth, 496 0, 497 m_varobj_options.max_depth, 498 m_varobj_options.show_types, 499 m_varobj_options.show_location, 500 m_varobj_options.use_objc, 501 m_varobj_options.use_dynamic, 502 m_varobj_options.be_raw ? false : m_varobj_options.use_synth, 503 false, 504 m_varobj_options.flat_output, 505 m_varobj_options.be_raw ? UINT32_MAX : m_varobj_options.no_summary_depth, 506 m_varobj_options.be_raw ? true : m_varobj_options.ignore_cap); 507 } 508 } 509 } 510 } 511 else if (num_matches == 0) 512 { 513 result.GetErrorStream().Printf ("error: no variables matched the regular expression '%s'.\n", name_cstr); 514 } 515 } 516 else 517 { 518 char regex_error[1024]; 519 if (regex.GetErrorAsCString(regex_error, sizeof(regex_error))) 520 result.GetErrorStream().Printf ("error: %s\n", regex_error); 521 else 522 result.GetErrorStream().Printf ("error: unkown regex error when compiling '%s'\n", name_cstr); 523 } 524 } 525 else 526 { 527 Error error; 528 uint32_t expr_path_options = StackFrame::eExpressionPathOptionCheckPtrVsMember; 529 lldb::VariableSP var_sp; 530 valobj_sp = exe_ctx.frame->GetValueForVariableExpressionPath (name_cstr, 531 m_varobj_options.use_dynamic, 532 expr_path_options, 533 var_sp, 534 error); 535 if (valobj_sp) 536 { 537 if (m_option_variable.format != eFormatDefault) 538 valobj_sp->SetFormat (m_option_variable.format); 539 if (m_option_variable.show_decl && var_sp && var_sp->GetDeclaration ().GetFile()) 540 { 541 var_sp->GetDeclaration ().DumpStopContext (&s, false); 542 s.PutCString (": "); 543 } 544 if (summary_format_sp) 545 valobj_sp->SetCustomSummaryFormat(summary_format_sp); 546 ValueObject::DumpValueObject (result.GetOutputStream(), 547 valobj_sp.get(), 548 valobj_sp->GetParent() ? name_cstr : NULL, 549 ptr_depth, 550 0, 551 m_varobj_options.max_depth, 552 m_varobj_options.show_types, 553 m_varobj_options.show_location, 554 m_varobj_options.use_objc, 555 m_varobj_options.use_dynamic, 556 m_varobj_options.be_raw ? false : m_varobj_options.use_synth, 557 false, 558 m_varobj_options.flat_output, 559 m_varobj_options.be_raw ? UINT32_MAX : m_varobj_options.no_summary_depth, 560 m_varobj_options.be_raw ? true : m_varobj_options.ignore_cap); 561 } 562 else 563 { 564 const char *error_cstr = error.AsCString(NULL); 565 if (error_cstr) 566 result.GetErrorStream().Printf("error: %s\n", error_cstr); 567 else 568 result.GetErrorStream().Printf ("error: unable to find any variable expression path that matches '%s'\n", name_cstr); 569 } 570 } 571 } 572 } 573 else 574 { 575 const uint32_t num_variables = variable_list->GetSize(); 576 577 if (num_variables > 0) 578 { 579 for (uint32_t i=0; i<num_variables; i++) 580 { 581 var_sp = variable_list->GetVariableAtIndex(i); 582 583 bool dump_variable = true; 584 585 switch (var_sp->GetScope()) 586 { 587 case eValueTypeVariableGlobal: 588 dump_variable = m_option_variable.show_globals; 589 if (dump_variable && m_option_variable.show_scope) 590 s.PutCString("GLOBAL: "); 591 break; 592 593 case eValueTypeVariableStatic: 594 dump_variable = m_option_variable.show_globals; 595 if (dump_variable && m_option_variable.show_scope) 596 s.PutCString("STATIC: "); 597 break; 598 599 case eValueTypeVariableArgument: 600 dump_variable = m_option_variable.show_args; 601 if (dump_variable && m_option_variable.show_scope) 602 s.PutCString(" ARG: "); 603 break; 604 605 case eValueTypeVariableLocal: 606 dump_variable = m_option_variable.show_locals; 607 if (dump_variable && m_option_variable.show_scope) 608 s.PutCString(" LOCAL: "); 609 break; 610 611 default: 612 break; 613 } 614 615 if (dump_variable) 616 { 617 618 // Use the variable object code to make sure we are 619 // using the same APIs as the the public API will be 620 // using... 621 valobj_sp = exe_ctx.frame->GetValueObjectForFrameVariable (var_sp, 622 m_varobj_options.use_dynamic); 623 if (valobj_sp) 624 { 625 if (m_option_variable.format != eFormatDefault) 626 valobj_sp->SetFormat (m_option_variable.format); 627 628 // When dumping all variables, don't print any variables 629 // that are not in scope to avoid extra unneeded output 630 if (valobj_sp->IsInScope ()) 631 { 632 if (m_option_variable.show_decl && var_sp->GetDeclaration ().GetFile()) 633 { 634 var_sp->GetDeclaration ().DumpStopContext (&s, false); 635 s.PutCString (": "); 636 } 637 if (summary_format_sp) 638 valobj_sp->SetCustomSummaryFormat(summary_format_sp); 639 ValueObject::DumpValueObject (result.GetOutputStream(), 640 valobj_sp.get(), 641 name_cstr, 642 m_varobj_options.ptr_depth, 643 0, 644 m_varobj_options.max_depth, 645 m_varobj_options.show_types, 646 m_varobj_options.show_location, 647 m_varobj_options.use_objc, 648 m_varobj_options.use_dynamic, 649 m_varobj_options.be_raw ? false : m_varobj_options.use_synth, 650 false, 651 m_varobj_options.flat_output, 652 m_varobj_options.be_raw ? UINT32_MAX : m_varobj_options.no_summary_depth, 653 m_varobj_options.be_raw ? true : m_varobj_options.ignore_cap); 654 } 655 } 656 } 657 } 658 } 659 } 660 result.SetStatus (eReturnStatusSuccessFinishResult); 661 } 662 } 663 return result.Succeeded(); 664 } 665 protected: 666 667 OptionGroupOptions m_option_group; 668 OptionGroupVariable m_option_variable; 669 OptionGroupValueObjectDisplay m_varobj_options; 670 }; 671 672 673 #pragma mark CommandObjectMultiwordFrame 674 675 //------------------------------------------------------------------------- 676 // CommandObjectMultiwordFrame 677 //------------------------------------------------------------------------- 678 679 CommandObjectMultiwordFrame::CommandObjectMultiwordFrame (CommandInterpreter &interpreter) : 680 CommandObjectMultiword (interpreter, 681 "frame", 682 "A set of commands for operating on the current thread's frames.", 683 "frame <subcommand> [<subcommand-options>]") 684 { 685 LoadSubCommand ("info", CommandObjectSP (new CommandObjectFrameInfo (interpreter))); 686 LoadSubCommand ("select", CommandObjectSP (new CommandObjectFrameSelect (interpreter))); 687 LoadSubCommand ("variable", CommandObjectSP (new CommandObjectFrameVariable (interpreter))); 688 } 689 690 CommandObjectMultiwordFrame::~CommandObjectMultiwordFrame () 691 { 692 } 693 694