1 //===-- CommandObjectMemory.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 "CommandObjectMemory.h" 10 #include "CommandObjectMemoryTag.h" 11 #include "lldb/Core/DumpDataExtractor.h" 12 #include "lldb/Core/Section.h" 13 #include "lldb/Core/ValueObjectMemory.h" 14 #include "lldb/Expression/ExpressionVariable.h" 15 #include "lldb/Host/OptionParser.h" 16 #include "lldb/Interpreter/CommandOptionArgumentTable.h" 17 #include "lldb/Interpreter/CommandReturnObject.h" 18 #include "lldb/Interpreter/OptionArgParser.h" 19 #include "lldb/Interpreter/OptionGroupFormat.h" 20 #include "lldb/Interpreter/OptionGroupMemoryTag.h" 21 #include "lldb/Interpreter/OptionGroupOutputFile.h" 22 #include "lldb/Interpreter/OptionGroupValueObjectDisplay.h" 23 #include "lldb/Interpreter/OptionValueLanguage.h" 24 #include "lldb/Interpreter/OptionValueString.h" 25 #include "lldb/Interpreter/Options.h" 26 #include "lldb/Symbol/SymbolFile.h" 27 #include "lldb/Symbol/TypeList.h" 28 #include "lldb/Target/ABI.h" 29 #include "lldb/Target/Language.h" 30 #include "lldb/Target/MemoryHistory.h" 31 #include "lldb/Target/MemoryRegionInfo.h" 32 #include "lldb/Target/Process.h" 33 #include "lldb/Target/StackFrame.h" 34 #include "lldb/Target/Target.h" 35 #include "lldb/Target/Thread.h" 36 #include "lldb/Utility/Args.h" 37 #include "lldb/Utility/DataBufferHeap.h" 38 #include "lldb/Utility/StreamString.h" 39 #include "llvm/Support/MathExtras.h" 40 #include <cinttypes> 41 #include <memory> 42 #include <optional> 43 44 using namespace lldb; 45 using namespace lldb_private; 46 47 #define LLDB_OPTIONS_memory_read 48 #include "CommandOptions.inc" 49 50 class OptionGroupReadMemory : public OptionGroup { 51 public: 52 OptionGroupReadMemory() 53 : m_num_per_line(1, 1), m_offset(0, 0), 54 m_language_for_type(eLanguageTypeUnknown) {} 55 56 ~OptionGroupReadMemory() override = default; 57 58 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 59 return llvm::ArrayRef(g_memory_read_options); 60 } 61 62 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_value, 63 ExecutionContext *execution_context) override { 64 Status error; 65 const int short_option = g_memory_read_options[option_idx].short_option; 66 67 switch (short_option) { 68 case 'l': 69 error = m_num_per_line.SetValueFromString(option_value); 70 if (m_num_per_line.GetCurrentValue() == 0) 71 error.SetErrorStringWithFormat( 72 "invalid value for --num-per-line option '%s'", 73 option_value.str().c_str()); 74 break; 75 76 case 'b': 77 m_output_as_binary = true; 78 break; 79 80 case 't': 81 error = m_view_as_type.SetValueFromString(option_value); 82 break; 83 84 case 'r': 85 m_force = true; 86 break; 87 88 case 'x': 89 error = m_language_for_type.SetValueFromString(option_value); 90 break; 91 92 case 'E': 93 error = m_offset.SetValueFromString(option_value); 94 break; 95 96 default: 97 llvm_unreachable("Unimplemented option"); 98 } 99 return error; 100 } 101 102 void OptionParsingStarting(ExecutionContext *execution_context) override { 103 m_num_per_line.Clear(); 104 m_output_as_binary = false; 105 m_view_as_type.Clear(); 106 m_force = false; 107 m_offset.Clear(); 108 m_language_for_type.Clear(); 109 } 110 111 Status FinalizeSettings(Target *target, OptionGroupFormat &format_options) { 112 Status error; 113 OptionValueUInt64 &byte_size_value = format_options.GetByteSizeValue(); 114 OptionValueUInt64 &count_value = format_options.GetCountValue(); 115 const bool byte_size_option_set = byte_size_value.OptionWasSet(); 116 const bool num_per_line_option_set = m_num_per_line.OptionWasSet(); 117 const bool count_option_set = format_options.GetCountValue().OptionWasSet(); 118 119 switch (format_options.GetFormat()) { 120 default: 121 break; 122 123 case eFormatBoolean: 124 if (!byte_size_option_set) 125 byte_size_value = 1; 126 if (!num_per_line_option_set) 127 m_num_per_line = 1; 128 if (!count_option_set) 129 format_options.GetCountValue() = 8; 130 break; 131 132 case eFormatCString: 133 break; 134 135 case eFormatInstruction: 136 if (count_option_set) 137 byte_size_value = target->GetArchitecture().GetMaximumOpcodeByteSize(); 138 m_num_per_line = 1; 139 break; 140 141 case eFormatAddressInfo: 142 if (!byte_size_option_set) 143 byte_size_value = target->GetArchitecture().GetAddressByteSize(); 144 m_num_per_line = 1; 145 if (!count_option_set) 146 format_options.GetCountValue() = 8; 147 break; 148 149 case eFormatPointer: 150 byte_size_value = target->GetArchitecture().GetAddressByteSize(); 151 if (!num_per_line_option_set) 152 m_num_per_line = 4; 153 if (!count_option_set) 154 format_options.GetCountValue() = 8; 155 break; 156 157 case eFormatBinary: 158 case eFormatFloat: 159 case eFormatOctal: 160 case eFormatDecimal: 161 case eFormatEnum: 162 case eFormatUnicode8: 163 case eFormatUnicode16: 164 case eFormatUnicode32: 165 case eFormatUnsigned: 166 case eFormatHexFloat: 167 if (!byte_size_option_set) 168 byte_size_value = 4; 169 if (!num_per_line_option_set) 170 m_num_per_line = 1; 171 if (!count_option_set) 172 format_options.GetCountValue() = 8; 173 break; 174 175 case eFormatBytes: 176 case eFormatBytesWithASCII: 177 if (byte_size_option_set) { 178 if (byte_size_value > 1) 179 error.SetErrorStringWithFormat( 180 "display format (bytes/bytes with ASCII) conflicts with the " 181 "specified byte size %" PRIu64 "\n" 182 "\tconsider using a different display format or don't specify " 183 "the byte size.", 184 byte_size_value.GetCurrentValue()); 185 } else 186 byte_size_value = 1; 187 if (!num_per_line_option_set) 188 m_num_per_line = 16; 189 if (!count_option_set) 190 format_options.GetCountValue() = 32; 191 break; 192 193 case eFormatCharArray: 194 case eFormatChar: 195 case eFormatCharPrintable: 196 if (!byte_size_option_set) 197 byte_size_value = 1; 198 if (!num_per_line_option_set) 199 m_num_per_line = 32; 200 if (!count_option_set) 201 format_options.GetCountValue() = 64; 202 break; 203 204 case eFormatComplex: 205 if (!byte_size_option_set) 206 byte_size_value = 8; 207 if (!num_per_line_option_set) 208 m_num_per_line = 1; 209 if (!count_option_set) 210 format_options.GetCountValue() = 8; 211 break; 212 213 case eFormatComplexInteger: 214 if (!byte_size_option_set) 215 byte_size_value = 8; 216 if (!num_per_line_option_set) 217 m_num_per_line = 1; 218 if (!count_option_set) 219 format_options.GetCountValue() = 8; 220 break; 221 222 case eFormatHex: 223 if (!byte_size_option_set) 224 byte_size_value = 4; 225 if (!num_per_line_option_set) { 226 switch (byte_size_value) { 227 case 1: 228 case 2: 229 m_num_per_line = 8; 230 break; 231 case 4: 232 m_num_per_line = 4; 233 break; 234 case 8: 235 m_num_per_line = 2; 236 break; 237 default: 238 m_num_per_line = 1; 239 break; 240 } 241 } 242 if (!count_option_set) 243 count_value = 8; 244 break; 245 246 case eFormatVectorOfChar: 247 case eFormatVectorOfSInt8: 248 case eFormatVectorOfUInt8: 249 case eFormatVectorOfSInt16: 250 case eFormatVectorOfUInt16: 251 case eFormatVectorOfSInt32: 252 case eFormatVectorOfUInt32: 253 case eFormatVectorOfSInt64: 254 case eFormatVectorOfUInt64: 255 case eFormatVectorOfFloat16: 256 case eFormatVectorOfFloat32: 257 case eFormatVectorOfFloat64: 258 case eFormatVectorOfUInt128: 259 if (!byte_size_option_set) 260 byte_size_value = 128; 261 if (!num_per_line_option_set) 262 m_num_per_line = 1; 263 if (!count_option_set) 264 count_value = 4; 265 break; 266 } 267 return error; 268 } 269 270 bool AnyOptionWasSet() const { 271 return m_num_per_line.OptionWasSet() || m_output_as_binary || 272 m_view_as_type.OptionWasSet() || m_offset.OptionWasSet() || 273 m_language_for_type.OptionWasSet(); 274 } 275 276 OptionValueUInt64 m_num_per_line; 277 bool m_output_as_binary = false; 278 OptionValueString m_view_as_type; 279 bool m_force = false; 280 OptionValueUInt64 m_offset; 281 OptionValueLanguage m_language_for_type; 282 }; 283 284 // Read memory from the inferior process 285 class CommandObjectMemoryRead : public CommandObjectParsed { 286 public: 287 CommandObjectMemoryRead(CommandInterpreter &interpreter) 288 : CommandObjectParsed( 289 interpreter, "memory read", 290 "Read from the memory of the current target process.", nullptr, 291 eCommandRequiresTarget | eCommandProcessMustBePaused), 292 m_format_options(eFormatBytesWithASCII, 1, 8), 293 m_memory_tag_options(/*note_binary=*/true), 294 m_prev_format_options(eFormatBytesWithASCII, 1, 8) { 295 CommandArgumentEntry arg1; 296 CommandArgumentEntry arg2; 297 CommandArgumentData start_addr_arg; 298 CommandArgumentData end_addr_arg; 299 300 // Define the first (and only) variant of this arg. 301 start_addr_arg.arg_type = eArgTypeAddressOrExpression; 302 start_addr_arg.arg_repetition = eArgRepeatPlain; 303 304 // There is only one variant this argument could be; put it into the 305 // argument entry. 306 arg1.push_back(start_addr_arg); 307 308 // Define the first (and only) variant of this arg. 309 end_addr_arg.arg_type = eArgTypeAddressOrExpression; 310 end_addr_arg.arg_repetition = eArgRepeatOptional; 311 312 // There is only one variant this argument could be; put it into the 313 // argument entry. 314 arg2.push_back(end_addr_arg); 315 316 // Push the data for the first argument into the m_arguments vector. 317 m_arguments.push_back(arg1); 318 m_arguments.push_back(arg2); 319 320 // Add the "--format" and "--count" options to group 1 and 3 321 m_option_group.Append(&m_format_options, 322 OptionGroupFormat::OPTION_GROUP_FORMAT | 323 OptionGroupFormat::OPTION_GROUP_COUNT, 324 LLDB_OPT_SET_1 | LLDB_OPT_SET_2 | LLDB_OPT_SET_3); 325 m_option_group.Append(&m_format_options, 326 OptionGroupFormat::OPTION_GROUP_GDB_FMT, 327 LLDB_OPT_SET_1 | LLDB_OPT_SET_3); 328 // Add the "--size" option to group 1 and 2 329 m_option_group.Append(&m_format_options, 330 OptionGroupFormat::OPTION_GROUP_SIZE, 331 LLDB_OPT_SET_1 | LLDB_OPT_SET_2); 332 m_option_group.Append(&m_memory_options); 333 m_option_group.Append(&m_outfile_options, LLDB_OPT_SET_ALL, 334 LLDB_OPT_SET_1 | LLDB_OPT_SET_2 | LLDB_OPT_SET_3); 335 m_option_group.Append(&m_varobj_options, LLDB_OPT_SET_ALL, LLDB_OPT_SET_3); 336 m_option_group.Append(&m_memory_tag_options, LLDB_OPT_SET_ALL, 337 LLDB_OPT_SET_ALL); 338 m_option_group.Finalize(); 339 } 340 341 ~CommandObjectMemoryRead() override = default; 342 343 Options *GetOptions() override { return &m_option_group; } 344 345 std::optional<std::string> GetRepeatCommand(Args ¤t_command_args, 346 uint32_t index) override { 347 return m_cmd_name; 348 } 349 350 protected: 351 bool DoExecute(Args &command, CommandReturnObject &result) override { 352 // No need to check "target" for validity as eCommandRequiresTarget ensures 353 // it is valid 354 Target *target = m_exe_ctx.GetTargetPtr(); 355 356 const size_t argc = command.GetArgumentCount(); 357 358 if ((argc == 0 && m_next_addr == LLDB_INVALID_ADDRESS) || argc > 2) { 359 result.AppendErrorWithFormat("%s takes a start address expression with " 360 "an optional end address expression.\n", 361 m_cmd_name.c_str()); 362 result.AppendWarning("Expressions should be quoted if they contain " 363 "spaces or other special characters."); 364 return false; 365 } 366 367 CompilerType compiler_type; 368 Status error; 369 370 const char *view_as_type_cstr = 371 m_memory_options.m_view_as_type.GetCurrentValue(); 372 if (view_as_type_cstr && view_as_type_cstr[0]) { 373 // We are viewing memory as a type 374 375 const bool exact_match = false; 376 TypeList type_list; 377 uint32_t reference_count = 0; 378 uint32_t pointer_count = 0; 379 size_t idx; 380 381 #define ALL_KEYWORDS \ 382 KEYWORD("const") \ 383 KEYWORD("volatile") \ 384 KEYWORD("restrict") \ 385 KEYWORD("struct") \ 386 KEYWORD("class") \ 387 KEYWORD("union") 388 389 #define KEYWORD(s) s, 390 static const char *g_keywords[] = {ALL_KEYWORDS}; 391 #undef KEYWORD 392 393 #define KEYWORD(s) (sizeof(s) - 1), 394 static const int g_keyword_lengths[] = {ALL_KEYWORDS}; 395 #undef KEYWORD 396 397 #undef ALL_KEYWORDS 398 399 static size_t g_num_keywords = sizeof(g_keywords) / sizeof(const char *); 400 std::string type_str(view_as_type_cstr); 401 402 // Remove all instances of g_keywords that are followed by spaces 403 for (size_t i = 0; i < g_num_keywords; ++i) { 404 const char *keyword = g_keywords[i]; 405 int keyword_len = g_keyword_lengths[i]; 406 407 idx = 0; 408 while ((idx = type_str.find(keyword, idx)) != std::string::npos) { 409 if (type_str[idx + keyword_len] == ' ' || 410 type_str[idx + keyword_len] == '\t') { 411 type_str.erase(idx, keyword_len + 1); 412 idx = 0; 413 } else { 414 idx += keyword_len; 415 } 416 } 417 } 418 bool done = type_str.empty(); 419 // 420 idx = type_str.find_first_not_of(" \t"); 421 if (idx > 0 && idx != std::string::npos) 422 type_str.erase(0, idx); 423 while (!done) { 424 // Strip trailing spaces 425 if (type_str.empty()) 426 done = true; 427 else { 428 switch (type_str[type_str.size() - 1]) { 429 case '*': 430 ++pointer_count; 431 [[fallthrough]]; 432 case ' ': 433 case '\t': 434 type_str.erase(type_str.size() - 1); 435 break; 436 437 case '&': 438 if (reference_count == 0) { 439 reference_count = 1; 440 type_str.erase(type_str.size() - 1); 441 } else { 442 result.AppendErrorWithFormat("invalid type string: '%s'\n", 443 view_as_type_cstr); 444 return false; 445 } 446 break; 447 448 default: 449 done = true; 450 break; 451 } 452 } 453 } 454 455 llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files; 456 ConstString lookup_type_name(type_str.c_str()); 457 StackFrame *frame = m_exe_ctx.GetFramePtr(); 458 ModuleSP search_first; 459 if (frame) { 460 search_first = frame->GetSymbolContext(eSymbolContextModule).module_sp; 461 } 462 target->GetImages().FindTypes(search_first.get(), lookup_type_name, 463 exact_match, 1, searched_symbol_files, 464 type_list); 465 466 if (type_list.GetSize() == 0 && lookup_type_name.GetCString()) { 467 LanguageType language_for_type = 468 m_memory_options.m_language_for_type.GetCurrentValue(); 469 std::set<LanguageType> languages_to_check; 470 if (language_for_type != eLanguageTypeUnknown) { 471 languages_to_check.insert(language_for_type); 472 } else { 473 languages_to_check = Language::GetSupportedLanguages(); 474 } 475 476 std::set<CompilerType> user_defined_types; 477 for (auto lang : languages_to_check) { 478 if (auto *persistent_vars = 479 target->GetPersistentExpressionStateForLanguage(lang)) { 480 if (std::optional<CompilerType> type = 481 persistent_vars->GetCompilerTypeFromPersistentDecl( 482 lookup_type_name)) { 483 user_defined_types.emplace(*type); 484 } 485 } 486 } 487 488 if (user_defined_types.size() > 1) { 489 result.AppendErrorWithFormat( 490 "Mutiple types found matching raw type '%s', please disambiguate " 491 "by specifying the language with -x", 492 lookup_type_name.GetCString()); 493 return false; 494 } 495 496 if (user_defined_types.size() == 1) { 497 compiler_type = *user_defined_types.begin(); 498 } 499 } 500 501 if (!compiler_type.IsValid()) { 502 if (type_list.GetSize() == 0) { 503 result.AppendErrorWithFormat("unable to find any types that match " 504 "the raw type '%s' for full type '%s'\n", 505 lookup_type_name.GetCString(), 506 view_as_type_cstr); 507 return false; 508 } else { 509 TypeSP type_sp(type_list.GetTypeAtIndex(0)); 510 compiler_type = type_sp->GetFullCompilerType(); 511 } 512 } 513 514 while (pointer_count > 0) { 515 CompilerType pointer_type = compiler_type.GetPointerType(); 516 if (pointer_type.IsValid()) 517 compiler_type = pointer_type; 518 else { 519 result.AppendError("unable make a pointer type\n"); 520 return false; 521 } 522 --pointer_count; 523 } 524 525 std::optional<uint64_t> size = compiler_type.GetByteSize(nullptr); 526 if (!size) { 527 result.AppendErrorWithFormat( 528 "unable to get the byte size of the type '%s'\n", 529 view_as_type_cstr); 530 return false; 531 } 532 m_format_options.GetByteSizeValue() = *size; 533 534 if (!m_format_options.GetCountValue().OptionWasSet()) 535 m_format_options.GetCountValue() = 1; 536 } else { 537 error = m_memory_options.FinalizeSettings(target, m_format_options); 538 } 539 540 // Look for invalid combinations of settings 541 if (error.Fail()) { 542 result.AppendError(error.AsCString()); 543 return false; 544 } 545 546 lldb::addr_t addr; 547 size_t total_byte_size = 0; 548 if (argc == 0) { 549 // Use the last address and byte size and all options as they were if no 550 // options have been set 551 addr = m_next_addr; 552 total_byte_size = m_prev_byte_size; 553 compiler_type = m_prev_compiler_type; 554 if (!m_format_options.AnyOptionWasSet() && 555 !m_memory_options.AnyOptionWasSet() && 556 !m_outfile_options.AnyOptionWasSet() && 557 !m_varobj_options.AnyOptionWasSet() && 558 !m_memory_tag_options.AnyOptionWasSet()) { 559 m_format_options = m_prev_format_options; 560 m_memory_options = m_prev_memory_options; 561 m_outfile_options = m_prev_outfile_options; 562 m_varobj_options = m_prev_varobj_options; 563 m_memory_tag_options = m_prev_memory_tag_options; 564 } 565 } 566 567 size_t item_count = m_format_options.GetCountValue().GetCurrentValue(); 568 569 // TODO For non-8-bit byte addressable architectures this needs to be 570 // revisited to fully support all lldb's range of formatting options. 571 // Furthermore code memory reads (for those architectures) will not be 572 // correctly formatted even w/o formatting options. 573 size_t item_byte_size = 574 target->GetArchitecture().GetDataByteSize() > 1 575 ? target->GetArchitecture().GetDataByteSize() 576 : m_format_options.GetByteSizeValue().GetCurrentValue(); 577 578 const size_t num_per_line = 579 m_memory_options.m_num_per_line.GetCurrentValue(); 580 581 if (total_byte_size == 0) { 582 total_byte_size = item_count * item_byte_size; 583 if (total_byte_size == 0) 584 total_byte_size = 32; 585 } 586 587 if (argc > 0) 588 addr = OptionArgParser::ToAddress(&m_exe_ctx, command[0].ref(), 589 LLDB_INVALID_ADDRESS, &error); 590 591 if (addr == LLDB_INVALID_ADDRESS) { 592 result.AppendError("invalid start address expression."); 593 result.AppendError(error.AsCString()); 594 return false; 595 } 596 597 if (argc == 2) { 598 lldb::addr_t end_addr = OptionArgParser::ToAddress( 599 &m_exe_ctx, command[1].ref(), LLDB_INVALID_ADDRESS, nullptr); 600 601 if (end_addr == LLDB_INVALID_ADDRESS) { 602 result.AppendError("invalid end address expression."); 603 result.AppendError(error.AsCString()); 604 return false; 605 } else if (end_addr <= addr) { 606 result.AppendErrorWithFormat( 607 "end address (0x%" PRIx64 608 ") must be greater than the start address (0x%" PRIx64 ").\n", 609 end_addr, addr); 610 return false; 611 } else if (m_format_options.GetCountValue().OptionWasSet()) { 612 result.AppendErrorWithFormat( 613 "specify either the end address (0x%" PRIx64 614 ") or the count (--count %" PRIu64 "), not both.\n", 615 end_addr, (uint64_t)item_count); 616 return false; 617 } 618 619 total_byte_size = end_addr - addr; 620 item_count = total_byte_size / item_byte_size; 621 } 622 623 uint32_t max_unforced_size = target->GetMaximumMemReadSize(); 624 625 if (total_byte_size > max_unforced_size && !m_memory_options.m_force) { 626 result.AppendErrorWithFormat( 627 "Normally, \'memory read\' will not read over %" PRIu32 628 " bytes of data.\n", 629 max_unforced_size); 630 result.AppendErrorWithFormat( 631 "Please use --force to override this restriction just once.\n"); 632 result.AppendErrorWithFormat("or set target.max-memory-read-size if you " 633 "will often need a larger limit.\n"); 634 return false; 635 } 636 637 WritableDataBufferSP data_sp; 638 size_t bytes_read = 0; 639 if (compiler_type.GetOpaqueQualType()) { 640 // Make sure we don't display our type as ASCII bytes like the default 641 // memory read 642 if (!m_format_options.GetFormatValue().OptionWasSet()) 643 m_format_options.GetFormatValue().SetCurrentValue(eFormatDefault); 644 645 std::optional<uint64_t> size = compiler_type.GetByteSize(nullptr); 646 if (!size) { 647 result.AppendError("can't get size of type"); 648 return false; 649 } 650 bytes_read = *size * m_format_options.GetCountValue().GetCurrentValue(); 651 652 if (argc > 0) 653 addr = addr + (*size * m_memory_options.m_offset.GetCurrentValue()); 654 } else if (m_format_options.GetFormatValue().GetCurrentValue() != 655 eFormatCString) { 656 data_sp = std::make_shared<DataBufferHeap>(total_byte_size, '\0'); 657 if (data_sp->GetBytes() == nullptr) { 658 result.AppendErrorWithFormat( 659 "can't allocate 0x%" PRIx32 660 " bytes for the memory read buffer, specify a smaller size to read", 661 (uint32_t)total_byte_size); 662 return false; 663 } 664 665 Address address(addr, nullptr); 666 bytes_read = target->ReadMemory(address, data_sp->GetBytes(), 667 data_sp->GetByteSize(), error, true); 668 if (bytes_read == 0) { 669 const char *error_cstr = error.AsCString(); 670 if (error_cstr && error_cstr[0]) { 671 result.AppendError(error_cstr); 672 } else { 673 result.AppendErrorWithFormat( 674 "failed to read memory from 0x%" PRIx64 ".\n", addr); 675 } 676 return false; 677 } 678 679 if (bytes_read < total_byte_size) 680 result.AppendWarningWithFormat( 681 "Not all bytes (%" PRIu64 "/%" PRIu64 682 ") were able to be read from 0x%" PRIx64 ".\n", 683 (uint64_t)bytes_read, (uint64_t)total_byte_size, addr); 684 } else { 685 // we treat c-strings as a special case because they do not have a fixed 686 // size 687 if (m_format_options.GetByteSizeValue().OptionWasSet() && 688 !m_format_options.HasGDBFormat()) 689 item_byte_size = m_format_options.GetByteSizeValue().GetCurrentValue(); 690 else 691 item_byte_size = target->GetMaximumSizeOfStringSummary(); 692 if (!m_format_options.GetCountValue().OptionWasSet()) 693 item_count = 1; 694 data_sp = std::make_shared<DataBufferHeap>( 695 (item_byte_size + 1) * item_count, 696 '\0'); // account for NULLs as necessary 697 if (data_sp->GetBytes() == nullptr) { 698 result.AppendErrorWithFormat( 699 "can't allocate 0x%" PRIx64 700 " bytes for the memory read buffer, specify a smaller size to read", 701 (uint64_t)((item_byte_size + 1) * item_count)); 702 return false; 703 } 704 uint8_t *data_ptr = data_sp->GetBytes(); 705 auto data_addr = addr; 706 auto count = item_count; 707 item_count = 0; 708 bool break_on_no_NULL = false; 709 while (item_count < count) { 710 std::string buffer; 711 buffer.resize(item_byte_size + 1, 0); 712 Status error; 713 size_t read = target->ReadCStringFromMemory(data_addr, &buffer[0], 714 item_byte_size + 1, error); 715 if (error.Fail()) { 716 result.AppendErrorWithFormat( 717 "failed to read memory from 0x%" PRIx64 ".\n", addr); 718 return false; 719 } 720 721 if (item_byte_size == read) { 722 result.AppendWarningWithFormat( 723 "unable to find a NULL terminated string at 0x%" PRIx64 724 ". Consider increasing the maximum read length.\n", 725 data_addr); 726 --read; 727 break_on_no_NULL = true; 728 } else 729 ++read; // account for final NULL byte 730 731 memcpy(data_ptr, &buffer[0], read); 732 data_ptr += read; 733 data_addr += read; 734 bytes_read += read; 735 item_count++; // if we break early we know we only read item_count 736 // strings 737 738 if (break_on_no_NULL) 739 break; 740 } 741 data_sp = 742 std::make_shared<DataBufferHeap>(data_sp->GetBytes(), bytes_read + 1); 743 } 744 745 m_next_addr = addr + bytes_read; 746 m_prev_byte_size = bytes_read; 747 m_prev_format_options = m_format_options; 748 m_prev_memory_options = m_memory_options; 749 m_prev_outfile_options = m_outfile_options; 750 m_prev_varobj_options = m_varobj_options; 751 m_prev_memory_tag_options = m_memory_tag_options; 752 m_prev_compiler_type = compiler_type; 753 754 std::unique_ptr<Stream> output_stream_storage; 755 Stream *output_stream_p = nullptr; 756 const FileSpec &outfile_spec = 757 m_outfile_options.GetFile().GetCurrentValue(); 758 759 std::string path = outfile_spec.GetPath(); 760 if (outfile_spec) { 761 762 File::OpenOptions open_options = 763 File::eOpenOptionWriteOnly | File::eOpenOptionCanCreate; 764 const bool append = m_outfile_options.GetAppend().GetCurrentValue(); 765 open_options |= 766 append ? File::eOpenOptionAppend : File::eOpenOptionTruncate; 767 768 auto outfile = FileSystem::Instance().Open(outfile_spec, open_options); 769 770 if (outfile) { 771 auto outfile_stream_up = 772 std::make_unique<StreamFile>(std::move(outfile.get())); 773 if (m_memory_options.m_output_as_binary) { 774 const size_t bytes_written = 775 outfile_stream_up->Write(data_sp->GetBytes(), bytes_read); 776 if (bytes_written > 0) { 777 result.GetOutputStream().Printf( 778 "%zi bytes %s to '%s'\n", bytes_written, 779 append ? "appended" : "written", path.c_str()); 780 return true; 781 } else { 782 result.AppendErrorWithFormat("Failed to write %" PRIu64 783 " bytes to '%s'.\n", 784 (uint64_t)bytes_read, path.c_str()); 785 return false; 786 } 787 } else { 788 // We are going to write ASCII to the file just point the 789 // output_stream to our outfile_stream... 790 output_stream_storage = std::move(outfile_stream_up); 791 output_stream_p = output_stream_storage.get(); 792 } 793 } else { 794 result.AppendErrorWithFormat("Failed to open file '%s' for %s:\n", 795 path.c_str(), append ? "append" : "write"); 796 797 result.AppendError(llvm::toString(outfile.takeError())); 798 return false; 799 } 800 } else { 801 output_stream_p = &result.GetOutputStream(); 802 } 803 804 ExecutionContextScope *exe_scope = m_exe_ctx.GetBestExecutionContextScope(); 805 if (compiler_type.GetOpaqueQualType()) { 806 for (uint32_t i = 0; i < item_count; ++i) { 807 addr_t item_addr = addr + (i * item_byte_size); 808 Address address(item_addr); 809 StreamString name_strm; 810 name_strm.Printf("0x%" PRIx64, item_addr); 811 ValueObjectSP valobj_sp(ValueObjectMemory::Create( 812 exe_scope, name_strm.GetString(), address, compiler_type)); 813 if (valobj_sp) { 814 Format format = m_format_options.GetFormat(); 815 if (format != eFormatDefault) 816 valobj_sp->SetFormat(format); 817 818 DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions( 819 eLanguageRuntimeDescriptionDisplayVerbosityFull, format)); 820 821 valobj_sp->Dump(*output_stream_p, options); 822 } else { 823 result.AppendErrorWithFormat( 824 "failed to create a value object for: (%s) %s\n", 825 view_as_type_cstr, name_strm.GetData()); 826 return false; 827 } 828 } 829 return true; 830 } 831 832 result.SetStatus(eReturnStatusSuccessFinishResult); 833 DataExtractor data(data_sp, target->GetArchitecture().GetByteOrder(), 834 target->GetArchitecture().GetAddressByteSize(), 835 target->GetArchitecture().GetDataByteSize()); 836 837 Format format = m_format_options.GetFormat(); 838 if (((format == eFormatChar) || (format == eFormatCharPrintable)) && 839 (item_byte_size != 1)) { 840 // if a count was not passed, or it is 1 841 if (!m_format_options.GetCountValue().OptionWasSet() || item_count == 1) { 842 // this turns requests such as 843 // memory read -fc -s10 -c1 *charPtrPtr 844 // which make no sense (what is a char of size 10?) into a request for 845 // fetching 10 chars of size 1 from the same memory location 846 format = eFormatCharArray; 847 item_count = item_byte_size; 848 item_byte_size = 1; 849 } else { 850 // here we passed a count, and it was not 1 so we have a byte_size and 851 // a count we could well multiply those, but instead let's just fail 852 result.AppendErrorWithFormat( 853 "reading memory as characters of size %" PRIu64 " is not supported", 854 (uint64_t)item_byte_size); 855 return false; 856 } 857 } 858 859 assert(output_stream_p); 860 size_t bytes_dumped = DumpDataExtractor( 861 data, output_stream_p, 0, format, item_byte_size, item_count, 862 num_per_line / target->GetArchitecture().GetDataByteSize(), addr, 0, 0, 863 exe_scope, m_memory_tag_options.GetShowTags().GetCurrentValue()); 864 m_next_addr = addr + bytes_dumped; 865 output_stream_p->EOL(); 866 return true; 867 } 868 869 OptionGroupOptions m_option_group; 870 OptionGroupFormat m_format_options; 871 OptionGroupReadMemory m_memory_options; 872 OptionGroupOutputFile m_outfile_options; 873 OptionGroupValueObjectDisplay m_varobj_options; 874 OptionGroupMemoryTag m_memory_tag_options; 875 lldb::addr_t m_next_addr = LLDB_INVALID_ADDRESS; 876 lldb::addr_t m_prev_byte_size = 0; 877 OptionGroupFormat m_prev_format_options; 878 OptionGroupReadMemory m_prev_memory_options; 879 OptionGroupOutputFile m_prev_outfile_options; 880 OptionGroupValueObjectDisplay m_prev_varobj_options; 881 OptionGroupMemoryTag m_prev_memory_tag_options; 882 CompilerType m_prev_compiler_type; 883 }; 884 885 #define LLDB_OPTIONS_memory_find 886 #include "CommandOptions.inc" 887 888 // Find the specified data in memory 889 class CommandObjectMemoryFind : public CommandObjectParsed { 890 public: 891 class OptionGroupFindMemory : public OptionGroup { 892 public: 893 OptionGroupFindMemory() : m_count(1), m_offset(0) {} 894 895 ~OptionGroupFindMemory() override = default; 896 897 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 898 return llvm::ArrayRef(g_memory_find_options); 899 } 900 901 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_value, 902 ExecutionContext *execution_context) override { 903 Status error; 904 const int short_option = g_memory_find_options[option_idx].short_option; 905 906 switch (short_option) { 907 case 'e': 908 m_expr.SetValueFromString(option_value); 909 break; 910 911 case 's': 912 m_string.SetValueFromString(option_value); 913 break; 914 915 case 'c': 916 if (m_count.SetValueFromString(option_value).Fail()) 917 error.SetErrorString("unrecognized value for count"); 918 break; 919 920 case 'o': 921 if (m_offset.SetValueFromString(option_value).Fail()) 922 error.SetErrorString("unrecognized value for dump-offset"); 923 break; 924 925 default: 926 llvm_unreachable("Unimplemented option"); 927 } 928 return error; 929 } 930 931 void OptionParsingStarting(ExecutionContext *execution_context) override { 932 m_expr.Clear(); 933 m_string.Clear(); 934 m_count.Clear(); 935 } 936 937 OptionValueString m_expr; 938 OptionValueString m_string; 939 OptionValueUInt64 m_count; 940 OptionValueUInt64 m_offset; 941 }; 942 943 CommandObjectMemoryFind(CommandInterpreter &interpreter) 944 : CommandObjectParsed( 945 interpreter, "memory find", 946 "Find a value in the memory of the current target process.", 947 nullptr, eCommandRequiresProcess | eCommandProcessMustBeLaunched) { 948 CommandArgumentEntry arg1; 949 CommandArgumentEntry arg2; 950 CommandArgumentData addr_arg; 951 CommandArgumentData value_arg; 952 953 // Define the first (and only) variant of this arg. 954 addr_arg.arg_type = eArgTypeAddressOrExpression; 955 addr_arg.arg_repetition = eArgRepeatPlain; 956 957 // There is only one variant this argument could be; put it into the 958 // argument entry. 959 arg1.push_back(addr_arg); 960 961 // Define the first (and only) variant of this arg. 962 value_arg.arg_type = eArgTypeAddressOrExpression; 963 value_arg.arg_repetition = eArgRepeatPlain; 964 965 // There is only one variant this argument could be; put it into the 966 // argument entry. 967 arg2.push_back(value_arg); 968 969 // Push the data for the first argument into the m_arguments vector. 970 m_arguments.push_back(arg1); 971 m_arguments.push_back(arg2); 972 973 m_option_group.Append(&m_memory_options); 974 m_option_group.Append(&m_memory_tag_options, LLDB_OPT_SET_ALL, 975 LLDB_OPT_SET_ALL); 976 m_option_group.Finalize(); 977 } 978 979 ~CommandObjectMemoryFind() override = default; 980 981 Options *GetOptions() override { return &m_option_group; } 982 983 protected: 984 class ProcessMemoryIterator { 985 public: 986 ProcessMemoryIterator(ProcessSP process_sp, lldb::addr_t base) 987 : m_process_sp(process_sp), m_base_addr(base) { 988 lldbassert(process_sp.get() != nullptr); 989 } 990 991 bool IsValid() { return m_is_valid; } 992 993 uint8_t operator[](lldb::addr_t offset) { 994 if (!IsValid()) 995 return 0; 996 997 uint8_t retval = 0; 998 Status error; 999 if (0 == 1000 m_process_sp->ReadMemory(m_base_addr + offset, &retval, 1, error)) { 1001 m_is_valid = false; 1002 return 0; 1003 } 1004 1005 return retval; 1006 } 1007 1008 private: 1009 ProcessSP m_process_sp; 1010 lldb::addr_t m_base_addr; 1011 bool m_is_valid = true; 1012 }; 1013 bool DoExecute(Args &command, CommandReturnObject &result) override { 1014 // No need to check "process" for validity as eCommandRequiresProcess 1015 // ensures it is valid 1016 Process *process = m_exe_ctx.GetProcessPtr(); 1017 1018 const size_t argc = command.GetArgumentCount(); 1019 1020 if (argc != 2) { 1021 result.AppendError("two addresses needed for memory find"); 1022 return false; 1023 } 1024 1025 Status error; 1026 lldb::addr_t low_addr = OptionArgParser::ToAddress( 1027 &m_exe_ctx, command[0].ref(), LLDB_INVALID_ADDRESS, &error); 1028 if (low_addr == LLDB_INVALID_ADDRESS || error.Fail()) { 1029 result.AppendError("invalid low address"); 1030 return false; 1031 } 1032 lldb::addr_t high_addr = OptionArgParser::ToAddress( 1033 &m_exe_ctx, command[1].ref(), LLDB_INVALID_ADDRESS, &error); 1034 if (high_addr == LLDB_INVALID_ADDRESS || error.Fail()) { 1035 result.AppendError("invalid high address"); 1036 return false; 1037 } 1038 1039 if (high_addr <= low_addr) { 1040 result.AppendError( 1041 "starting address must be smaller than ending address"); 1042 return false; 1043 } 1044 1045 lldb::addr_t found_location = LLDB_INVALID_ADDRESS; 1046 1047 DataBufferHeap buffer; 1048 1049 if (m_memory_options.m_string.OptionWasSet()) { 1050 std::optional<llvm::StringRef> str = 1051 m_memory_options.m_string.GetStringValue(); 1052 if (!str) { 1053 result.AppendError("search string must have non-zero length."); 1054 return false; 1055 } 1056 buffer.CopyData(*str); 1057 } else if (m_memory_options.m_expr.OptionWasSet()) { 1058 StackFrame *frame = m_exe_ctx.GetFramePtr(); 1059 ValueObjectSP result_sp; 1060 if ((eExpressionCompleted == 1061 process->GetTarget().EvaluateExpression( 1062 m_memory_options.m_expr.GetStringValue().value_or(""), frame, 1063 result_sp)) && 1064 result_sp) { 1065 uint64_t value = result_sp->GetValueAsUnsigned(0); 1066 std::optional<uint64_t> size = 1067 result_sp->GetCompilerType().GetByteSize(nullptr); 1068 if (!size) 1069 return false; 1070 switch (*size) { 1071 case 1: { 1072 uint8_t byte = (uint8_t)value; 1073 buffer.CopyData(&byte, 1); 1074 } break; 1075 case 2: { 1076 uint16_t word = (uint16_t)value; 1077 buffer.CopyData(&word, 2); 1078 } break; 1079 case 4: { 1080 uint32_t lword = (uint32_t)value; 1081 buffer.CopyData(&lword, 4); 1082 } break; 1083 case 8: { 1084 buffer.CopyData(&value, 8); 1085 } break; 1086 case 3: 1087 case 5: 1088 case 6: 1089 case 7: 1090 result.AppendError("unknown type. pass a string instead"); 1091 return false; 1092 default: 1093 result.AppendError( 1094 "result size larger than 8 bytes. pass a string instead"); 1095 return false; 1096 } 1097 } else { 1098 result.AppendError( 1099 "expression evaluation failed. pass a string instead"); 1100 return false; 1101 } 1102 } else { 1103 result.AppendError( 1104 "please pass either a block of text, or an expression to evaluate."); 1105 return false; 1106 } 1107 1108 size_t count = m_memory_options.m_count.GetCurrentValue(); 1109 found_location = low_addr; 1110 bool ever_found = false; 1111 while (count) { 1112 found_location = FastSearch(found_location, high_addr, buffer.GetBytes(), 1113 buffer.GetByteSize()); 1114 if (found_location == LLDB_INVALID_ADDRESS) { 1115 if (!ever_found) { 1116 result.AppendMessage("data not found within the range.\n"); 1117 result.SetStatus(lldb::eReturnStatusSuccessFinishNoResult); 1118 } else 1119 result.AppendMessage("no more matches within the range.\n"); 1120 break; 1121 } 1122 result.AppendMessageWithFormat("data found at location: 0x%" PRIx64 "\n", 1123 found_location); 1124 1125 DataBufferHeap dumpbuffer(32, 0); 1126 process->ReadMemory( 1127 found_location + m_memory_options.m_offset.GetCurrentValue(), 1128 dumpbuffer.GetBytes(), dumpbuffer.GetByteSize(), error); 1129 if (!error.Fail()) { 1130 DataExtractor data(dumpbuffer.GetBytes(), dumpbuffer.GetByteSize(), 1131 process->GetByteOrder(), 1132 process->GetAddressByteSize()); 1133 DumpDataExtractor( 1134 data, &result.GetOutputStream(), 0, lldb::eFormatBytesWithASCII, 1, 1135 dumpbuffer.GetByteSize(), 16, 1136 found_location + m_memory_options.m_offset.GetCurrentValue(), 0, 0, 1137 m_exe_ctx.GetBestExecutionContextScope(), 1138 m_memory_tag_options.GetShowTags().GetCurrentValue()); 1139 result.GetOutputStream().EOL(); 1140 } 1141 1142 --count; 1143 found_location++; 1144 ever_found = true; 1145 } 1146 1147 result.SetStatus(lldb::eReturnStatusSuccessFinishResult); 1148 return true; 1149 } 1150 1151 lldb::addr_t FastSearch(lldb::addr_t low, lldb::addr_t high, uint8_t *buffer, 1152 size_t buffer_size) { 1153 const size_t region_size = high - low; 1154 1155 if (region_size < buffer_size) 1156 return LLDB_INVALID_ADDRESS; 1157 1158 std::vector<size_t> bad_char_heuristic(256, buffer_size); 1159 ProcessSP process_sp = m_exe_ctx.GetProcessSP(); 1160 ProcessMemoryIterator iterator(process_sp, low); 1161 1162 for (size_t idx = 0; idx < buffer_size - 1; idx++) { 1163 decltype(bad_char_heuristic)::size_type bcu_idx = buffer[idx]; 1164 bad_char_heuristic[bcu_idx] = buffer_size - idx - 1; 1165 } 1166 for (size_t s = 0; s <= (region_size - buffer_size);) { 1167 int64_t j = buffer_size - 1; 1168 while (j >= 0 && buffer[j] == iterator[s + j]) 1169 j--; 1170 if (j < 0) 1171 return low + s; 1172 else 1173 s += bad_char_heuristic[iterator[s + buffer_size - 1]]; 1174 } 1175 1176 return LLDB_INVALID_ADDRESS; 1177 } 1178 1179 OptionGroupOptions m_option_group; 1180 OptionGroupFindMemory m_memory_options; 1181 OptionGroupMemoryTag m_memory_tag_options; 1182 }; 1183 1184 #define LLDB_OPTIONS_memory_write 1185 #include "CommandOptions.inc" 1186 1187 // Write memory to the inferior process 1188 class CommandObjectMemoryWrite : public CommandObjectParsed { 1189 public: 1190 class OptionGroupWriteMemory : public OptionGroup { 1191 public: 1192 OptionGroupWriteMemory() = default; 1193 1194 ~OptionGroupWriteMemory() override = default; 1195 1196 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 1197 return llvm::ArrayRef(g_memory_write_options); 1198 } 1199 1200 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_value, 1201 ExecutionContext *execution_context) override { 1202 Status error; 1203 const int short_option = g_memory_write_options[option_idx].short_option; 1204 1205 switch (short_option) { 1206 case 'i': 1207 m_infile.SetFile(option_value, FileSpec::Style::native); 1208 FileSystem::Instance().Resolve(m_infile); 1209 if (!FileSystem::Instance().Exists(m_infile)) { 1210 m_infile.Clear(); 1211 error.SetErrorStringWithFormat("input file does not exist: '%s'", 1212 option_value.str().c_str()); 1213 } 1214 break; 1215 1216 case 'o': { 1217 if (option_value.getAsInteger(0, m_infile_offset)) { 1218 m_infile_offset = 0; 1219 error.SetErrorStringWithFormat("invalid offset string '%s'", 1220 option_value.str().c_str()); 1221 } 1222 } break; 1223 1224 default: 1225 llvm_unreachable("Unimplemented option"); 1226 } 1227 return error; 1228 } 1229 1230 void OptionParsingStarting(ExecutionContext *execution_context) override { 1231 m_infile.Clear(); 1232 m_infile_offset = 0; 1233 } 1234 1235 FileSpec m_infile; 1236 off_t m_infile_offset; 1237 }; 1238 1239 CommandObjectMemoryWrite(CommandInterpreter &interpreter) 1240 : CommandObjectParsed( 1241 interpreter, "memory write", 1242 "Write to the memory of the current target process.", nullptr, 1243 eCommandRequiresProcess | eCommandProcessMustBeLaunched), 1244 m_format_options( 1245 eFormatBytes, 1, UINT64_MAX, 1246 {std::make_tuple( 1247 eArgTypeFormat, 1248 "The format to use for each of the value to be written."), 1249 std::make_tuple(eArgTypeByteSize, 1250 "The size in bytes to write from input file or " 1251 "each value.")}) { 1252 CommandArgumentEntry arg1; 1253 CommandArgumentEntry arg2; 1254 CommandArgumentData addr_arg; 1255 CommandArgumentData value_arg; 1256 1257 // Define the first (and only) variant of this arg. 1258 addr_arg.arg_type = eArgTypeAddress; 1259 addr_arg.arg_repetition = eArgRepeatPlain; 1260 1261 // There is only one variant this argument could be; put it into the 1262 // argument entry. 1263 arg1.push_back(addr_arg); 1264 1265 // Define the first (and only) variant of this arg. 1266 value_arg.arg_type = eArgTypeValue; 1267 value_arg.arg_repetition = eArgRepeatPlus; 1268 value_arg.arg_opt_set_association = LLDB_OPT_SET_1; 1269 1270 // There is only one variant this argument could be; put it into the 1271 // argument entry. 1272 arg2.push_back(value_arg); 1273 1274 // Push the data for the first argument into the m_arguments vector. 1275 m_arguments.push_back(arg1); 1276 m_arguments.push_back(arg2); 1277 1278 m_option_group.Append(&m_format_options, 1279 OptionGroupFormat::OPTION_GROUP_FORMAT, 1280 LLDB_OPT_SET_1); 1281 m_option_group.Append(&m_format_options, 1282 OptionGroupFormat::OPTION_GROUP_SIZE, 1283 LLDB_OPT_SET_1 | LLDB_OPT_SET_2); 1284 m_option_group.Append(&m_memory_options, LLDB_OPT_SET_ALL, LLDB_OPT_SET_2); 1285 m_option_group.Finalize(); 1286 } 1287 1288 ~CommandObjectMemoryWrite() override = default; 1289 1290 Options *GetOptions() override { return &m_option_group; } 1291 1292 protected: 1293 bool DoExecute(Args &command, CommandReturnObject &result) override { 1294 // No need to check "process" for validity as eCommandRequiresProcess 1295 // ensures it is valid 1296 Process *process = m_exe_ctx.GetProcessPtr(); 1297 1298 const size_t argc = command.GetArgumentCount(); 1299 1300 if (m_memory_options.m_infile) { 1301 if (argc < 1) { 1302 result.AppendErrorWithFormat( 1303 "%s takes a destination address when writing file contents.\n", 1304 m_cmd_name.c_str()); 1305 return false; 1306 } 1307 if (argc > 1) { 1308 result.AppendErrorWithFormat( 1309 "%s takes only a destination address when writing file contents.\n", 1310 m_cmd_name.c_str()); 1311 return false; 1312 } 1313 } else if (argc < 2) { 1314 result.AppendErrorWithFormat( 1315 "%s takes a destination address and at least one value.\n", 1316 m_cmd_name.c_str()); 1317 return false; 1318 } 1319 1320 StreamString buffer( 1321 Stream::eBinary, 1322 process->GetTarget().GetArchitecture().GetAddressByteSize(), 1323 process->GetTarget().GetArchitecture().GetByteOrder()); 1324 1325 OptionValueUInt64 &byte_size_value = m_format_options.GetByteSizeValue(); 1326 size_t item_byte_size = byte_size_value.GetCurrentValue(); 1327 1328 Status error; 1329 lldb::addr_t addr = OptionArgParser::ToAddress( 1330 &m_exe_ctx, command[0].ref(), LLDB_INVALID_ADDRESS, &error); 1331 1332 if (addr == LLDB_INVALID_ADDRESS) { 1333 result.AppendError("invalid address expression\n"); 1334 result.AppendError(error.AsCString()); 1335 return false; 1336 } 1337 1338 if (m_memory_options.m_infile) { 1339 size_t length = SIZE_MAX; 1340 if (item_byte_size > 1) 1341 length = item_byte_size; 1342 auto data_sp = FileSystem::Instance().CreateDataBuffer( 1343 m_memory_options.m_infile.GetPath(), length, 1344 m_memory_options.m_infile_offset); 1345 if (data_sp) { 1346 length = data_sp->GetByteSize(); 1347 if (length > 0) { 1348 Status error; 1349 size_t bytes_written = 1350 process->WriteMemory(addr, data_sp->GetBytes(), length, error); 1351 1352 if (bytes_written == length) { 1353 // All bytes written 1354 result.GetOutputStream().Printf( 1355 "%" PRIu64 " bytes were written to 0x%" PRIx64 "\n", 1356 (uint64_t)bytes_written, addr); 1357 result.SetStatus(eReturnStatusSuccessFinishResult); 1358 } else if (bytes_written > 0) { 1359 // Some byte written 1360 result.GetOutputStream().Printf( 1361 "%" PRIu64 " bytes of %" PRIu64 1362 " requested were written to 0x%" PRIx64 "\n", 1363 (uint64_t)bytes_written, (uint64_t)length, addr); 1364 result.SetStatus(eReturnStatusSuccessFinishResult); 1365 } else { 1366 result.AppendErrorWithFormat("Memory write to 0x%" PRIx64 1367 " failed: %s.\n", 1368 addr, error.AsCString()); 1369 } 1370 } 1371 } else { 1372 result.AppendErrorWithFormat("Unable to read contents of file.\n"); 1373 } 1374 return result.Succeeded(); 1375 } else if (item_byte_size == 0) { 1376 if (m_format_options.GetFormat() == eFormatPointer) 1377 item_byte_size = buffer.GetAddressByteSize(); 1378 else 1379 item_byte_size = 1; 1380 } 1381 1382 command.Shift(); // shift off the address argument 1383 uint64_t uval64; 1384 int64_t sval64; 1385 bool success = false; 1386 for (auto &entry : command) { 1387 switch (m_format_options.GetFormat()) { 1388 case kNumFormats: 1389 case eFormatFloat: // TODO: add support for floats soon 1390 case eFormatCharPrintable: 1391 case eFormatBytesWithASCII: 1392 case eFormatComplex: 1393 case eFormatEnum: 1394 case eFormatUnicode8: 1395 case eFormatUnicode16: 1396 case eFormatUnicode32: 1397 case eFormatVectorOfChar: 1398 case eFormatVectorOfSInt8: 1399 case eFormatVectorOfUInt8: 1400 case eFormatVectorOfSInt16: 1401 case eFormatVectorOfUInt16: 1402 case eFormatVectorOfSInt32: 1403 case eFormatVectorOfUInt32: 1404 case eFormatVectorOfSInt64: 1405 case eFormatVectorOfUInt64: 1406 case eFormatVectorOfFloat16: 1407 case eFormatVectorOfFloat32: 1408 case eFormatVectorOfFloat64: 1409 case eFormatVectorOfUInt128: 1410 case eFormatOSType: 1411 case eFormatComplexInteger: 1412 case eFormatAddressInfo: 1413 case eFormatHexFloat: 1414 case eFormatInstruction: 1415 case eFormatVoid: 1416 result.AppendError("unsupported format for writing memory"); 1417 return false; 1418 1419 case eFormatDefault: 1420 case eFormatBytes: 1421 case eFormatHex: 1422 case eFormatHexUppercase: 1423 case eFormatPointer: { 1424 // Decode hex bytes 1425 // Be careful, getAsInteger with a radix of 16 rejects "0xab" so we 1426 // have to special case that: 1427 bool success = false; 1428 if (entry.ref().startswith("0x")) 1429 success = !entry.ref().getAsInteger(0, uval64); 1430 if (!success) 1431 success = !entry.ref().getAsInteger(16, uval64); 1432 if (!success) { 1433 result.AppendErrorWithFormat( 1434 "'%s' is not a valid hex string value.\n", entry.c_str()); 1435 return false; 1436 } else if (!llvm::isUIntN(item_byte_size * 8, uval64)) { 1437 result.AppendErrorWithFormat("Value 0x%" PRIx64 1438 " is too large to fit in a %" PRIu64 1439 " byte unsigned integer value.\n", 1440 uval64, (uint64_t)item_byte_size); 1441 return false; 1442 } 1443 buffer.PutMaxHex64(uval64, item_byte_size); 1444 break; 1445 } 1446 case eFormatBoolean: 1447 uval64 = OptionArgParser::ToBoolean(entry.ref(), false, &success); 1448 if (!success) { 1449 result.AppendErrorWithFormat( 1450 "'%s' is not a valid boolean string value.\n", entry.c_str()); 1451 return false; 1452 } 1453 buffer.PutMaxHex64(uval64, item_byte_size); 1454 break; 1455 1456 case eFormatBinary: 1457 if (entry.ref().getAsInteger(2, uval64)) { 1458 result.AppendErrorWithFormat( 1459 "'%s' is not a valid binary string value.\n", entry.c_str()); 1460 return false; 1461 } else if (!llvm::isUIntN(item_byte_size * 8, uval64)) { 1462 result.AppendErrorWithFormat("Value 0x%" PRIx64 1463 " is too large to fit in a %" PRIu64 1464 " byte unsigned integer value.\n", 1465 uval64, (uint64_t)item_byte_size); 1466 return false; 1467 } 1468 buffer.PutMaxHex64(uval64, item_byte_size); 1469 break; 1470 1471 case eFormatCharArray: 1472 case eFormatChar: 1473 case eFormatCString: { 1474 if (entry.ref().empty()) 1475 break; 1476 1477 size_t len = entry.ref().size(); 1478 // Include the NULL for C strings... 1479 if (m_format_options.GetFormat() == eFormatCString) 1480 ++len; 1481 Status error; 1482 if (process->WriteMemory(addr, entry.c_str(), len, error) == len) { 1483 addr += len; 1484 } else { 1485 result.AppendErrorWithFormat("Memory write to 0x%" PRIx64 1486 " failed: %s.\n", 1487 addr, error.AsCString()); 1488 return false; 1489 } 1490 break; 1491 } 1492 case eFormatDecimal: 1493 if (entry.ref().getAsInteger(0, sval64)) { 1494 result.AppendErrorWithFormat( 1495 "'%s' is not a valid signed decimal value.\n", entry.c_str()); 1496 return false; 1497 } else if (!llvm::isIntN(item_byte_size * 8, sval64)) { 1498 result.AppendErrorWithFormat( 1499 "Value %" PRIi64 " is too large or small to fit in a %" PRIu64 1500 " byte signed integer value.\n", 1501 sval64, (uint64_t)item_byte_size); 1502 return false; 1503 } 1504 buffer.PutMaxHex64(sval64, item_byte_size); 1505 break; 1506 1507 case eFormatUnsigned: 1508 1509 if (entry.ref().getAsInteger(0, uval64)) { 1510 result.AppendErrorWithFormat( 1511 "'%s' is not a valid unsigned decimal string value.\n", 1512 entry.c_str()); 1513 return false; 1514 } else if (!llvm::isUIntN(item_byte_size * 8, uval64)) { 1515 result.AppendErrorWithFormat("Value %" PRIu64 1516 " is too large to fit in a %" PRIu64 1517 " byte unsigned integer value.\n", 1518 uval64, (uint64_t)item_byte_size); 1519 return false; 1520 } 1521 buffer.PutMaxHex64(uval64, item_byte_size); 1522 break; 1523 1524 case eFormatOctal: 1525 if (entry.ref().getAsInteger(8, uval64)) { 1526 result.AppendErrorWithFormat( 1527 "'%s' is not a valid octal string value.\n", entry.c_str()); 1528 return false; 1529 } else if (!llvm::isUIntN(item_byte_size * 8, uval64)) { 1530 result.AppendErrorWithFormat("Value %" PRIo64 1531 " is too large to fit in a %" PRIu64 1532 " byte unsigned integer value.\n", 1533 uval64, (uint64_t)item_byte_size); 1534 return false; 1535 } 1536 buffer.PutMaxHex64(uval64, item_byte_size); 1537 break; 1538 } 1539 } 1540 1541 if (!buffer.GetString().empty()) { 1542 Status error; 1543 if (process->WriteMemory(addr, buffer.GetString().data(), 1544 buffer.GetString().size(), 1545 error) == buffer.GetString().size()) 1546 return true; 1547 else { 1548 result.AppendErrorWithFormat("Memory write to 0x%" PRIx64 1549 " failed: %s.\n", 1550 addr, error.AsCString()); 1551 return false; 1552 } 1553 } 1554 return true; 1555 } 1556 1557 OptionGroupOptions m_option_group; 1558 OptionGroupFormat m_format_options; 1559 OptionGroupWriteMemory m_memory_options; 1560 }; 1561 1562 // Get malloc/free history of a memory address. 1563 class CommandObjectMemoryHistory : public CommandObjectParsed { 1564 public: 1565 CommandObjectMemoryHistory(CommandInterpreter &interpreter) 1566 : CommandObjectParsed(interpreter, "memory history", 1567 "Print recorded stack traces for " 1568 "allocation/deallocation events " 1569 "associated with an address.", 1570 nullptr, 1571 eCommandRequiresTarget | eCommandRequiresProcess | 1572 eCommandProcessMustBePaused | 1573 eCommandProcessMustBeLaunched) { 1574 CommandArgumentEntry arg1; 1575 CommandArgumentData addr_arg; 1576 1577 // Define the first (and only) variant of this arg. 1578 addr_arg.arg_type = eArgTypeAddress; 1579 addr_arg.arg_repetition = eArgRepeatPlain; 1580 1581 // There is only one variant this argument could be; put it into the 1582 // argument entry. 1583 arg1.push_back(addr_arg); 1584 1585 // Push the data for the first argument into the m_arguments vector. 1586 m_arguments.push_back(arg1); 1587 } 1588 1589 ~CommandObjectMemoryHistory() override = default; 1590 1591 std::optional<std::string> GetRepeatCommand(Args ¤t_command_args, 1592 uint32_t index) override { 1593 return m_cmd_name; 1594 } 1595 1596 protected: 1597 bool DoExecute(Args &command, CommandReturnObject &result) override { 1598 const size_t argc = command.GetArgumentCount(); 1599 1600 if (argc == 0 || argc > 1) { 1601 result.AppendErrorWithFormat("%s takes an address expression", 1602 m_cmd_name.c_str()); 1603 return false; 1604 } 1605 1606 Status error; 1607 lldb::addr_t addr = OptionArgParser::ToAddress( 1608 &m_exe_ctx, command[0].ref(), LLDB_INVALID_ADDRESS, &error); 1609 1610 if (addr == LLDB_INVALID_ADDRESS) { 1611 result.AppendError("invalid address expression"); 1612 result.AppendError(error.AsCString()); 1613 return false; 1614 } 1615 1616 Stream *output_stream = &result.GetOutputStream(); 1617 1618 const ProcessSP &process_sp = m_exe_ctx.GetProcessSP(); 1619 const MemoryHistorySP &memory_history = 1620 MemoryHistory::FindPlugin(process_sp); 1621 1622 if (!memory_history) { 1623 result.AppendError("no available memory history provider"); 1624 return false; 1625 } 1626 1627 HistoryThreads thread_list = memory_history->GetHistoryThreads(addr); 1628 1629 const bool stop_format = false; 1630 for (auto thread : thread_list) { 1631 thread->GetStatus(*output_stream, 0, UINT32_MAX, 0, stop_format); 1632 } 1633 1634 result.SetStatus(eReturnStatusSuccessFinishResult); 1635 1636 return true; 1637 } 1638 }; 1639 1640 // CommandObjectMemoryRegion 1641 #pragma mark CommandObjectMemoryRegion 1642 1643 #define LLDB_OPTIONS_memory_region 1644 #include "CommandOptions.inc" 1645 1646 class CommandObjectMemoryRegion : public CommandObjectParsed { 1647 public: 1648 class OptionGroupMemoryRegion : public OptionGroup { 1649 public: 1650 OptionGroupMemoryRegion() : m_all(false, false) {} 1651 1652 ~OptionGroupMemoryRegion() override = default; 1653 1654 llvm::ArrayRef<OptionDefinition> GetDefinitions() override { 1655 return llvm::ArrayRef(g_memory_region_options); 1656 } 1657 1658 Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_value, 1659 ExecutionContext *execution_context) override { 1660 Status status; 1661 const int short_option = g_memory_region_options[option_idx].short_option; 1662 1663 switch (short_option) { 1664 case 'a': 1665 m_all.SetCurrentValue(true); 1666 m_all.SetOptionWasSet(); 1667 break; 1668 default: 1669 llvm_unreachable("Unimplemented option"); 1670 } 1671 1672 return status; 1673 } 1674 1675 void OptionParsingStarting(ExecutionContext *execution_context) override { 1676 m_all.Clear(); 1677 } 1678 1679 OptionValueBoolean m_all; 1680 }; 1681 1682 CommandObjectMemoryRegion(CommandInterpreter &interpreter) 1683 : CommandObjectParsed(interpreter, "memory region", 1684 "Get information on the memory region containing " 1685 "an address in the current target process.", 1686 "memory region <address-expression> (or --all)", 1687 eCommandRequiresProcess | eCommandTryTargetAPILock | 1688 eCommandProcessMustBeLaunched) { 1689 // Address in option set 1. 1690 m_arguments.push_back(CommandArgumentEntry{CommandArgumentData( 1691 eArgTypeAddressOrExpression, eArgRepeatPlain, LLDB_OPT_SET_1)}); 1692 // "--all" will go in option set 2. 1693 m_option_group.Append(&m_memory_region_options); 1694 m_option_group.Finalize(); 1695 } 1696 1697 ~CommandObjectMemoryRegion() override = default; 1698 1699 Options *GetOptions() override { return &m_option_group; } 1700 1701 protected: 1702 void DumpRegion(CommandReturnObject &result, Target &target, 1703 const MemoryRegionInfo &range_info, lldb::addr_t load_addr) { 1704 lldb_private::Address addr; 1705 ConstString section_name; 1706 if (target.ResolveLoadAddress(load_addr, addr)) { 1707 SectionSP section_sp(addr.GetSection()); 1708 if (section_sp) { 1709 // Got the top most section, not the deepest section 1710 while (section_sp->GetParent()) 1711 section_sp = section_sp->GetParent(); 1712 section_name = section_sp->GetName(); 1713 } 1714 } 1715 1716 ConstString name = range_info.GetName(); 1717 result.AppendMessageWithFormatv( 1718 "[{0:x16}-{1:x16}) {2:r}{3:w}{4:x}{5}{6}{7}{8}", 1719 range_info.GetRange().GetRangeBase(), 1720 range_info.GetRange().GetRangeEnd(), range_info.GetReadable(), 1721 range_info.GetWritable(), range_info.GetExecutable(), name ? " " : "", 1722 name, section_name ? " " : "", section_name); 1723 MemoryRegionInfo::OptionalBool memory_tagged = range_info.GetMemoryTagged(); 1724 if (memory_tagged == MemoryRegionInfo::OptionalBool::eYes) 1725 result.AppendMessage("memory tagging: enabled"); 1726 1727 const std::optional<std::vector<addr_t>> &dirty_page_list = 1728 range_info.GetDirtyPageList(); 1729 if (dirty_page_list) { 1730 const size_t page_count = dirty_page_list->size(); 1731 result.AppendMessageWithFormat( 1732 "Modified memory (dirty) page list provided, %zu entries.\n", 1733 page_count); 1734 if (page_count > 0) { 1735 bool print_comma = false; 1736 result.AppendMessageWithFormat("Dirty pages: "); 1737 for (size_t i = 0; i < page_count; i++) { 1738 if (print_comma) 1739 result.AppendMessageWithFormat(", "); 1740 else 1741 print_comma = true; 1742 result.AppendMessageWithFormat("0x%" PRIx64, (*dirty_page_list)[i]); 1743 } 1744 result.AppendMessageWithFormat(".\n"); 1745 } 1746 } 1747 } 1748 1749 bool DoExecute(Args &command, CommandReturnObject &result) override { 1750 ProcessSP process_sp = m_exe_ctx.GetProcessSP(); 1751 if (!process_sp) { 1752 m_prev_end_addr = LLDB_INVALID_ADDRESS; 1753 result.AppendError("invalid process"); 1754 return false; 1755 } 1756 1757 Status error; 1758 lldb::addr_t load_addr = m_prev_end_addr; 1759 m_prev_end_addr = LLDB_INVALID_ADDRESS; 1760 1761 const size_t argc = command.GetArgumentCount(); 1762 const lldb::ABISP &abi = process_sp->GetABI(); 1763 1764 if (argc == 1) { 1765 if (m_memory_region_options.m_all) { 1766 result.AppendError( 1767 "The \"--all\" option cannot be used when an address " 1768 "argument is given"); 1769 return false; 1770 } 1771 1772 auto load_addr_str = command[0].ref(); 1773 load_addr = OptionArgParser::ToAddress(&m_exe_ctx, load_addr_str, 1774 LLDB_INVALID_ADDRESS, &error); 1775 if (error.Fail() || load_addr == LLDB_INVALID_ADDRESS) { 1776 result.AppendErrorWithFormat("invalid address argument \"%s\": %s\n", 1777 command[0].c_str(), error.AsCString()); 1778 return false; 1779 } 1780 } else if (argc > 1 || 1781 // When we're repeating the command, the previous end address is 1782 // used for load_addr. If that was 0xF...F then we must have 1783 // reached the end of memory. 1784 (argc == 0 && !m_memory_region_options.m_all && 1785 load_addr == LLDB_INVALID_ADDRESS) || 1786 // If the target has non-address bits (tags, limited virtual 1787 // address size, etc.), the end of mappable memory will be lower 1788 // than that. So if we find any non-address bit set, we must be 1789 // at the end of the mappable range. 1790 (abi && (abi->FixAnyAddress(load_addr) != load_addr))) { 1791 result.AppendErrorWithFormat( 1792 "'%s' takes one argument or \"--all\" option:\nUsage: %s\n", 1793 m_cmd_name.c_str(), m_cmd_syntax.c_str()); 1794 return false; 1795 } 1796 1797 // Is is important that we track the address used to request the region as 1798 // this will give the correct section name in the case that regions overlap. 1799 // On Windows we get mutliple regions that start at the same place but are 1800 // different sizes and refer to different sections. 1801 std::vector<std::pair<lldb_private::MemoryRegionInfo, lldb::addr_t>> 1802 region_list; 1803 if (m_memory_region_options.m_all) { 1804 // We don't use GetMemoryRegions here because it doesn't include unmapped 1805 // areas like repeating the command would. So instead, emulate doing that. 1806 lldb::addr_t addr = 0; 1807 while (error.Success() && addr != LLDB_INVALID_ADDRESS && 1808 // When there are non-address bits the last range will not extend 1809 // to LLDB_INVALID_ADDRESS but to the max virtual address. 1810 // This prevents us looping forever if that is the case. 1811 (!abi || (abi->FixAnyAddress(addr) == addr))) { 1812 lldb_private::MemoryRegionInfo region_info; 1813 error = process_sp->GetMemoryRegionInfo(addr, region_info); 1814 1815 if (error.Success()) { 1816 region_list.push_back({region_info, addr}); 1817 addr = region_info.GetRange().GetRangeEnd(); 1818 } 1819 } 1820 } else { 1821 lldb_private::MemoryRegionInfo region_info; 1822 error = process_sp->GetMemoryRegionInfo(load_addr, region_info); 1823 if (error.Success()) 1824 region_list.push_back({region_info, load_addr}); 1825 } 1826 1827 if (error.Success()) { 1828 for (std::pair<MemoryRegionInfo, addr_t> &range : region_list) { 1829 DumpRegion(result, process_sp->GetTarget(), range.first, range.second); 1830 m_prev_end_addr = range.first.GetRange().GetRangeEnd(); 1831 } 1832 1833 result.SetStatus(eReturnStatusSuccessFinishResult); 1834 return true; 1835 } 1836 1837 result.AppendErrorWithFormat("%s\n", error.AsCString()); 1838 return false; 1839 } 1840 1841 std::optional<std::string> GetRepeatCommand(Args ¤t_command_args, 1842 uint32_t index) override { 1843 // If we repeat this command, repeat it without any arguments so we can 1844 // show the next memory range 1845 return m_cmd_name; 1846 } 1847 1848 lldb::addr_t m_prev_end_addr = LLDB_INVALID_ADDRESS; 1849 1850 OptionGroupOptions m_option_group; 1851 OptionGroupMemoryRegion m_memory_region_options; 1852 }; 1853 1854 // CommandObjectMemory 1855 1856 CommandObjectMemory::CommandObjectMemory(CommandInterpreter &interpreter) 1857 : CommandObjectMultiword( 1858 interpreter, "memory", 1859 "Commands for operating on memory in the current target process.", 1860 "memory <subcommand> [<subcommand-options>]") { 1861 LoadSubCommand("find", 1862 CommandObjectSP(new CommandObjectMemoryFind(interpreter))); 1863 LoadSubCommand("read", 1864 CommandObjectSP(new CommandObjectMemoryRead(interpreter))); 1865 LoadSubCommand("write", 1866 CommandObjectSP(new CommandObjectMemoryWrite(interpreter))); 1867 LoadSubCommand("history", 1868 CommandObjectSP(new CommandObjectMemoryHistory(interpreter))); 1869 LoadSubCommand("region", 1870 CommandObjectSP(new CommandObjectMemoryRegion(interpreter))); 1871 LoadSubCommand("tag", 1872 CommandObjectSP(new CommandObjectMemoryTag(interpreter))); 1873 } 1874 1875 CommandObjectMemory::~CommandObjectMemory() = default; 1876