DynamicLoaderMacOSXDYLD.cpp revision e6bd142d9fa7ed149bd37efd8a75637375f165b7
1//===-- DynamicLoaderMacOSXDYLD.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 "lldb/Breakpoint/StoppointCallbackContext.h" 11#include "lldb/Core/DataBuffer.h" 12#include "lldb/Core/DataBufferHeap.h" 13#include "lldb/Core/Log.h" 14#include "lldb/Core/Module.h" 15#include "lldb/Core/PluginManager.h" 16#include "lldb/Core/State.h" 17#include "lldb/Symbol/ObjectFile.h" 18#include "lldb/Target/ObjCLanguageRuntime.h" 19#include "lldb/Target/RegisterContext.h" 20#include "lldb/Target/Target.h" 21#include "lldb/Target/Thread.h" 22#include "lldb/Target/ThreadPlanRunToAddress.h" 23#include "lldb/Target/StackFrame.h" 24 25#include "DynamicLoaderMacOSXDYLD.h" 26 27//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN 28#ifdef ENABLE_DEBUG_PRINTF 29#include <stdio.h> 30#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__) 31#else 32#define DEBUG_PRINTF(fmt, ...) 33#endif 34 35using namespace lldb; 36using namespace lldb_private; 37 38/// FIXME - The ObjC Runtime trampoline handler doesn't really belong here. 39/// I am putting it here so I can invoke it in the Trampoline code here, but 40/// it should be moved to the ObjC Runtime support when it is set up. 41 42 43DynamicLoaderMacOSXDYLD::DYLDImageInfo * 44DynamicLoaderMacOSXDYLD::GetImageInfo (Module *module) 45{ 46 const UUID &module_uuid = module->GetUUID(); 47 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 48 49 // First try just by UUID as it is the safest. 50 if (module_uuid.IsValid()) 51 { 52 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 53 { 54 if (pos->uuid == module_uuid) 55 return &(*pos); 56 } 57 58 if (m_dyld.uuid == module_uuid) 59 return &m_dyld; 60 } 61 62 // Next try by platform path only for things that don't have a valid UUID 63 // since if a file has a valid UUID in real life it should also in the 64 // dyld info. This is the next safest because the paths in the dyld info 65 // are platform paths, not local paths. For local debugging platform == local 66 // paths. 67 const FileSpec &platform_file_spec = module->GetPlatformFileSpec(); 68 for (pos = m_dyld_image_infos.begin(); pos != end; ++pos) 69 { 70 if (pos->file_spec == platform_file_spec && pos->uuid.IsValid() == false) 71 return &(*pos); 72 } 73 74 if (m_dyld.file_spec == platform_file_spec && m_dyld.uuid.IsValid() == false) 75 return &m_dyld; 76 77 return NULL; 78} 79 80//---------------------------------------------------------------------- 81// Create an instance of this class. This function is filled into 82// the plugin info class that gets handed out by the plugin factory and 83// allows the lldb to instantiate an instance of this class. 84//---------------------------------------------------------------------- 85DynamicLoader * 86DynamicLoaderMacOSXDYLD::CreateInstance (Process* process, bool force) 87{ 88 bool create = force; 89 if (!create) 90 { 91 const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); 92 if (triple_ref.getOS() == llvm::Triple::Darwin && triple_ref.getVendor() == llvm::Triple::Apple) 93 create = true; 94 } 95 96 if (create) 97 return new DynamicLoaderMacOSXDYLD (process); 98 return NULL; 99} 100 101//---------------------------------------------------------------------- 102// Constructor 103//---------------------------------------------------------------------- 104DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : 105 DynamicLoader(process), 106 m_dyld(), 107 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 108 m_dyld_all_image_infos(), 109 m_dyld_all_image_infos_stop_id (UINT32_MAX), 110 m_break_id(LLDB_INVALID_BREAK_ID), 111 m_dyld_image_infos(), 112 m_dyld_image_infos_stop_id (UINT32_MAX), 113 m_mutex(Mutex::eMutexTypeRecursive) 114{ 115} 116 117//---------------------------------------------------------------------- 118// Destructor 119//---------------------------------------------------------------------- 120DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() 121{ 122 Clear(true); 123} 124 125//------------------------------------------------------------------ 126/// Called after attaching a process. 127/// 128/// Allow DynamicLoader plug-ins to execute some code after 129/// attaching to a process. 130//------------------------------------------------------------------ 131void 132DynamicLoaderMacOSXDYLD::DidAttach () 133{ 134 PrivateInitialize(m_process); 135 LocateDYLD (); 136 SetNotificationBreakpoint (); 137} 138 139//------------------------------------------------------------------ 140/// Called after attaching a process. 141/// 142/// Allow DynamicLoader plug-ins to execute some code after 143/// attaching to a process. 144//------------------------------------------------------------------ 145void 146DynamicLoaderMacOSXDYLD::DidLaunch () 147{ 148 PrivateInitialize(m_process); 149 LocateDYLD (); 150 SetNotificationBreakpoint (); 151} 152 153 154//---------------------------------------------------------------------- 155// Clear out the state of this class. 156//---------------------------------------------------------------------- 157void 158DynamicLoaderMacOSXDYLD::Clear (bool clear_process) 159{ 160 Mutex::Locker locker(m_mutex); 161 162 if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id)) 163 m_process->ClearBreakpointSiteByID(m_break_id); 164 165 if (clear_process) 166 m_process = NULL; 167 m_dyld.Clear(false); 168 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 169 m_dyld_all_image_infos.Clear(); 170 m_break_id = LLDB_INVALID_BREAK_ID; 171 m_dyld_image_infos.clear(); 172} 173 174//---------------------------------------------------------------------- 175// Check if we have found DYLD yet 176//---------------------------------------------------------------------- 177bool 178DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() const 179{ 180 return LLDB_BREAK_ID_IS_VALID (m_break_id); 181} 182 183//---------------------------------------------------------------------- 184// Try and figure out where dyld is by first asking the Process 185// if it knows (which currently calls down in the the lldb::Process 186// to get the DYLD info (available on SnowLeopard only). If that fails, 187// then check in the default addresses. 188//---------------------------------------------------------------------- 189bool 190DynamicLoaderMacOSXDYLD::LocateDYLD() 191{ 192 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) 193 m_dyld_all_image_infos_addr = m_process->GetImageInfoAddress (); 194 195 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 196 { 197 if (ReadAllImageInfosStructure ()) 198 { 199 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 200 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); 201 else 202 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 203 } 204 } 205 206 // Check some default values 207 Module *executable = m_process->GetTarget().GetExecutableModule().get(); 208 209 if (executable) 210 { 211 if (executable->GetArchitecture().GetAddressByteSize() == 8) 212 { 213 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 214 } 215#if defined (__arm__) 216 else 217 { 218 ArchSpec arm_arch("arm"); 219 if (arm_arch == executable->Arch()) 220 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 221 } 222#endif 223 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 224 } 225 return false; 226} 227 228ModuleSP 229DynamicLoaderMacOSXDYLD::FindTargetModuleForDYLDImageInfo (const DYLDImageInfo &image_info, bool can_create, bool *did_create_ptr) 230{ 231 if (did_create_ptr) 232 *did_create_ptr = false; 233 ModuleSP module_sp; 234 ModuleList &target_images = m_process->GetTarget().GetImages(); 235 const bool image_info_uuid_is_valid = image_info.uuid.IsValid(); 236 if (image_info_uuid_is_valid) 237 module_sp = target_images.FindModule(image_info.uuid); 238 239 if (!module_sp) 240 { 241 ArchSpec arch(image_info.GetArchitecture ()); 242 243 module_sp = target_images.FindFirstModuleForFileSpec (image_info.file_spec, &arch, NULL); 244 245 if (can_create && !module_sp) 246 { 247 module_sp = m_process->GetTarget().GetSharedModule (image_info.file_spec, 248 arch, 249 image_info_uuid_is_valid ? &image_info.uuid : NULL); 250 if (did_create_ptr) 251 *did_create_ptr = module_sp; 252 } 253 } 254 return module_sp; 255} 256 257//---------------------------------------------------------------------- 258// Assume that dyld is in memory at ADDR and try to parse it's load 259// commands 260//---------------------------------------------------------------------- 261bool 262DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) 263{ 264 DataExtractor data; // Load command data 265 if (ReadMachHeader (addr, &m_dyld.header, &data)) 266 { 267 if (m_dyld.header.filetype == llvm::MachO::HeaderFileTypeDynamicLinkEditor) 268 { 269 m_dyld.address = addr; 270 ModuleSP dyld_module_sp; 271 if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) 272 { 273 if (m_dyld.file_spec) 274 { 275 dyld_module_sp = FindTargetModuleForDYLDImageInfo (m_dyld, true, NULL); 276 277 if (dyld_module_sp) 278 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 279 } 280 } 281 282 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) 283 { 284 static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); 285 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); 286 if (symbol) 287 m_dyld_all_image_infos_addr = symbol->GetValue().GetLoadAddress(&m_process->GetTarget()); 288 } 289 290 // Update all image infos 291 InitializeFromAllImageInfos (); 292 293 // If we didn't have an executable before, but now we do, then the 294 // dyld module shared pointer might be unique and we may need to add 295 // it again (since Target::SetExecutableModule() will clear the 296 // images). So append the dyld module back to the list if it is 297 /// unique! 298 if (dyld_module_sp && m_process->GetTarget().GetImages().AppendIfNeeded (dyld_module_sp)) 299 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 300 301 return true; 302 } 303 } 304 return false; 305} 306 307bool 308DynamicLoaderMacOSXDYLD::NeedToLocateDYLD () const 309{ 310 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 311} 312 313bool 314DynamicLoaderMacOSXDYLD::UpdateCommPageLoadAddress(Module *module) 315{ 316 bool changed = false; 317 if (module) 318 { 319 ObjectFile *image_object_file = module->GetObjectFile(); 320 if (image_object_file) 321 { 322 SectionList *section_list = image_object_file->GetSectionList (); 323 if (section_list) 324 { 325 uint32_t num_sections = section_list->GetSize(); 326 for (uint32_t i=0; i<num_sections; ++i) 327 { 328 Section* section = section_list->GetSectionAtIndex (i).get(); 329 if (section) 330 { 331 const addr_t new_section_load_addr = section->GetFileAddress (); 332 const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section); 333 if (old_section_load_addr == LLDB_INVALID_ADDRESS || 334 old_section_load_addr != new_section_load_addr) 335 { 336 if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section, section->GetFileAddress ())) 337 changed = true; 338 } 339 } 340 } 341 } 342 } 343 } 344 return changed; 345} 346 347//---------------------------------------------------------------------- 348// Update the load addresses for all segments in MODULE using the 349// updated INFO that is passed in. 350//---------------------------------------------------------------------- 351bool 352DynamicLoaderMacOSXDYLD::UpdateImageLoadAddress (Module *module, DYLDImageInfo& info) 353{ 354 bool changed = false; 355 if (module) 356 { 357 ObjectFile *image_object_file = module->GetObjectFile(); 358 if (image_object_file) 359 { 360 SectionList *section_list = image_object_file->GetSectionList (); 361 if (section_list) 362 { 363 // We now know the slide amount, so go through all sections 364 // and update the load addresses with the correct values. 365 uint32_t num_segments = info.segments.size(); 366 for (uint32_t i=0; i<num_segments; ++i) 367 { 368 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 369 const addr_t new_section_load_addr = info.segments[i].vmaddr + info.slide; 370 if (section_sp) 371 { 372 const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section_sp.get()); 373 if (old_section_load_addr == LLDB_INVALID_ADDRESS || 374 old_section_load_addr != new_section_load_addr) 375 { 376 if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section_sp.get(), new_section_load_addr)) 377 changed = true; 378 } 379 } 380 else 381 { 382 fprintf (stderr, 383 "warning: unable to find and load segment named '%s' at 0x%llx in '%s/%s' in macosx dynamic loader plug-in.\n", 384 info.segments[i].name.AsCString("<invalid>"), 385 (uint64_t)new_section_load_addr, 386 image_object_file->GetFileSpec().GetDirectory().AsCString(), 387 image_object_file->GetFileSpec().GetFilename().AsCString()); 388 } 389 } 390 } 391 } 392 } 393 return changed; 394} 395 396//---------------------------------------------------------------------- 397// Update the load addresses for all segments in MODULE using the 398// updated INFO that is passed in. 399//---------------------------------------------------------------------- 400bool 401DynamicLoaderMacOSXDYLD::UnloadImageLoadAddress (Module *module, DYLDImageInfo& info) 402{ 403 bool changed = false; 404 if (module) 405 { 406 ObjectFile *image_object_file = module->GetObjectFile(); 407 if (image_object_file) 408 { 409 SectionList *section_list = image_object_file->GetSectionList (); 410 if (section_list) 411 { 412 uint32_t num_segments = info.segments.size(); 413 for (uint32_t i=0; i<num_segments; ++i) 414 { 415 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 416 if (section_sp) 417 { 418 const addr_t old_section_load_addr = info.segments[i].vmaddr + info.slide; 419 if (m_process->GetTarget().GetSectionLoadList().SetSectionUnloaded (section_sp.get(), old_section_load_addr)) 420 changed = true; 421 } 422 else 423 { 424 fprintf (stderr, 425 "warning: unable to find and unload segment named '%s' in '%s/%s' in macosx dynamic loader plug-in.\n", 426 info.segments[i].name.AsCString("<invalid>"), 427 image_object_file->GetFileSpec().GetDirectory().AsCString(), 428 image_object_file->GetFileSpec().GetFilename().AsCString()); 429 } 430 } 431 } 432 } 433 } 434 return changed; 435} 436 437 438//---------------------------------------------------------------------- 439// Static callback function that gets called when our DYLD notification 440// breakpoint gets hit. We update all of our image infos and then 441// let our super class DynamicLoader class decide if we should stop 442// or not (based on global preference). 443//---------------------------------------------------------------------- 444bool 445DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, 446 StoppointCallbackContext *context, 447 lldb::user_id_t break_id, 448 lldb::user_id_t break_loc_id) 449{ 450 // Let the event know that the images have changed 451 // DYLD passes three arguments to the notification breakpoint. 452 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing 453 // Arg2: uint32_t infoCount - Number of shared libraries added 454 // Arg3: dyld_image_info info[] - Array of structs of the form: 455 // const struct mach_header *imageLoadAddress 456 // const char *imageFilePath 457 // uintptr_t imageFileModDate (a time_t) 458 459 DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; 460 461 // First step is to see if we've already initialized the all image infos. If we haven't then this function 462 // will do so and return true. In the course of initializing the all_image_infos it will read the complete 463 // current state, so we don't need to figure out what has changed from the data passed in to us. 464 465 if (dyld_instance->InitializeFromAllImageInfos()) 466 return dyld_instance->GetStopWhenImagesChange(); 467 468 Process *process = context->exe_ctx.process; 469 const lldb::ABISP &abi = process->GetABI(); 470 if (abi != NULL) 471 { 472 // Build up the value array to store the three arguments given above, then get the values from the ABI: 473 474 ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); 475 ValueList argument_values; 476 Value input_value; 477 478 void *clang_void_ptr_type = clang_ast_context->GetVoidPtrType(false); 479 void *clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); 480 input_value.SetValueType (Value::eValueTypeScalar); 481 input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); 482 argument_values.PushValue(input_value); 483 argument_values.PushValue(input_value); 484 input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); 485 argument_values.PushValue (input_value); 486 487 if (abi->GetArgumentValues (*context->exe_ctx.thread, argument_values)) 488 { 489 uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); 490 if (dyld_mode != -1) 491 { 492 // Okay the mode was right, now get the number of elements, and the array of new elements... 493 uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); 494 if (image_infos_count != -1) 495 { 496 // Got the number added, now go through the array of added elements, putting out the mach header 497 // address, and adding the image. 498 // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do 499 // all the logging internally. 500 501 lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 502 if (dyld_mode == 0) 503 { 504 // This is add: 505 dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 506 } 507 else 508 { 509 // This is remove: 510 dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 511 } 512 513 } 514 } 515 } 516 } 517 518 // Return true to stop the target, false to just let the target run 519 return dyld_instance->GetStopWhenImagesChange(); 520} 521 522bool 523DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () 524{ 525 Mutex::Locker locker(m_mutex); 526 527 // the all image infos is already valid for this process stop ID 528 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 529 return true; 530 531 m_dyld_all_image_infos.Clear(); 532 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 533 { 534 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 535 uint32_t addr_size = 4; 536 if (m_dyld_all_image_infos_addr > UINT32_MAX) 537 addr_size = 8; 538 539 uint8_t buf[256]; 540 DataExtractor data (buf, sizeof(buf), byte_order, addr_size); 541 uint32_t offset = 0; 542 543 const size_t count_v2 = sizeof (uint32_t) + // version 544 sizeof (uint32_t) + // infoArrayCount 545 addr_size + // infoArray 546 addr_size + // notification 547 addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad 548 addr_size; // dyldImageLoadAddress 549 const size_t count_v11 = count_v2 + 550 addr_size + // jitInfo 551 addr_size + // dyldVersion 552 addr_size + // errorMessage 553 addr_size + // terminationFlags 554 addr_size + // coreSymbolicationShmPage 555 addr_size + // systemOrderFlag 556 addr_size + // uuidArrayCount 557 addr_size + // uuidArray 558 addr_size + // dyldAllImageInfosAddress 559 addr_size + // initialImageCount 560 addr_size + // errorKind 561 addr_size + // errorClientOfDylibPath 562 addr_size + // errorTargetDylibPath 563 addr_size; // errorSymbol 564 assert (sizeof (buf) >= count_v11); 565 566 int count; 567 Error error; 568 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 569 { 570 m_dyld_all_image_infos.version = data.GetU32(&offset); 571 // If anything in the high byte is set, we probably got the byte 572 // order incorrect (the process might not have it set correctly 573 // yet due to attaching to a program without a specified file). 574 if (m_dyld_all_image_infos.version & 0xff000000) 575 { 576 // We have guessed the wrong byte order. Swap it and try 577 // reading the version again. 578 if (byte_order == eByteOrderLittle) 579 byte_order = eByteOrderBig; 580 else 581 byte_order = eByteOrderLittle; 582 583 data.SetByteOrder (byte_order); 584 offset = 0; 585 m_dyld_all_image_infos.version = data.GetU32(&offset); 586 } 587 } 588 else 589 { 590 return false; 591 } 592 593 if (m_dyld_all_image_infos.version >= 11) 594 count = count_v11; 595 else 596 count = count_v2; 597 598 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 599 if (bytes_read == count) 600 { 601 offset = 0; 602 m_dyld_all_image_infos.version = data.GetU32(&offset); 603 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 604 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 605 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 606 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 607 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 608 // Adjust for padding. 609 offset += addr_size - 2; 610 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 611 if (m_dyld_all_image_infos.version >= 11) 612 { 613 offset += addr_size * 8; 614 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 615 616 // When we started, we were given the actual address of the all_image_infos 617 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 618 // m_dyld_all_image_infos_addr and is the most accurate address we have. 619 620 // We read the dyld_all_image_infos struct from memory; it contains its own address. 621 // If the address in the struct does not match the actual address, 622 // the dyld we're looking at has been loaded at a different location (slid) from 623 // where it intended to load. The addresses in the dyld_all_image_infos struct 624 // are the original, non-slid addresses, and need to be adjusted. Most importantly 625 // the address of dyld and the notification address need to be adjusted. 626 627 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 628 { 629 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 630 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 631 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 632 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 633 } 634 } 635 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 636 return true; 637 } 638 } 639 return false; 640} 641 642 643bool 644DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 645{ 646 DYLDImageInfo::collection image_infos; 647 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 648 if (log) 649 log->Printf ("Adding %d modules.\n"); 650 651 Mutex::Locker locker(m_mutex); 652 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 653 return true; 654 655 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 656 return false; 657 658 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 659 bool return_value = AddModulesUsingImageInfos (image_infos); 660 m_dyld_image_infos_stop_id = m_process->GetStopID(); 661 return return_value; 662} 663 664// Adds the modules in image_infos to m_dyld_image_infos. 665// NB don't call this passing in m_dyld_image_infos. 666 667bool 668DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos) 669{ 670 // Now add these images to the main list. 671 ModuleList loaded_module_list; 672 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 673 674 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 675 { 676 if (log) 677 { 678 log->Printf ("Adding new image at address=0x%16.16llx.", image_infos[idx].address); 679 image_infos[idx].PutToLog (log.get()); 680 } 681 682 m_dyld_image_infos.push_back(image_infos[idx]); 683 684 ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL)); 685 686 if (image_module_sp) 687 { 688 if (image_infos[idx].header.filetype == llvm::MachO::HeaderFileTypeDynamicLinkEditor) 689 image_module_sp->SetIsDynamicLinkEditor (true); 690 691 ObjectFile *objfile = image_module_sp->GetObjectFile (); 692 if (objfile) 693 { 694 SectionList *sections = objfile->GetSectionList(); 695 if (sections) 696 { 697 ConstString commpage_dbstr("__commpage"); 698 Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get(); 699 if (commpage_section) 700 { 701 ModuleList& target_images = m_process->GetTarget().GetImages(); 702 const FileSpec objfile_file_spec = objfile->GetFileSpec(); 703 ArchSpec arch (image_infos[idx].GetArchitecture ()); 704 ModuleSP commpage_image_module_sp(target_images.FindFirstModuleForFileSpec (objfile_file_spec, 705 &arch, 706 &commpage_dbstr)); 707 if (!commpage_image_module_sp) 708 { 709 commpage_image_module_sp 710 = m_process->GetTarget().GetSharedModule (image_infos[idx].file_spec, 711 arch, 712 NULL, 713 &commpage_dbstr, 714 objfile->GetOffset() + commpage_section->GetFileOffset()); 715 } 716 if (commpage_image_module_sp) 717 UpdateCommPageLoadAddress (commpage_image_module_sp.get()); 718 } 719 } 720 } 721 722 // UpdateImageLoadAddress will return true if any segments 723 // change load address. We need to check this so we don't 724 // mention that all loaded shared libraries are newly loaded 725 // each time we hit out dyld breakpoint since dyld will list all 726 // shared libraries each time. 727 if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx])) 728 { 729 loaded_module_list.AppendIfNeeded (image_module_sp); 730 } 731 } 732 } 733 734 if (loaded_module_list.GetSize() > 0) 735 { 736 // FIXME: This should really be in the Runtime handlers class, which should get 737 // called by the target's ModulesDidLoad, but we're doing it all locally for now 738 // to save time. 739 // Also, I'm assuming there can be only one libobjc dylib loaded... 740 741 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); 742 if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) 743 { 744 size_t num_modules = loaded_module_list.GetSize(); 745 for (int i = 0; i < num_modules; i++) 746 { 747 if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) 748 { 749 objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); 750 break; 751 } 752 } 753 } 754 if (log) 755 loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad"); 756 m_process->GetTarget().ModulesDidLoad (loaded_module_list); 757 } 758 return true; 759} 760 761bool 762DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 763{ 764 DYLDImageInfo::collection image_infos; 765 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 766 767 Mutex::Locker locker(m_mutex); 768 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 769 return true; 770 771 // First read in the image_infos for the removed modules, and their headers & load commands. 772 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 773 { 774 if (log) 775 log->PutCString ("Failed reading image infos array."); 776 return false; 777 } 778 779 if (log) 780 log->Printf ("Removing %d modules.", image_infos_count); 781 782 ModuleList unloaded_module_list; 783 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 784 { 785 if (log) 786 { 787 log->Printf ("Removing module at address=0x%16.16llx.", image_infos[idx].address); 788 image_infos[idx].PutToLog (log.get()); 789 } 790 791 // Remove this image_infos from the m_all_image_infos. We do the comparision by address 792 // rather than by file spec because we can have many modules with the same "file spec" in the 793 // case that they are modules loaded from memory. 794 // 795 // Also copy over the uuid from the old entry to the removed entry so we can 796 // use it to lookup the module in the module list. 797 798 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 799 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 800 { 801 if (image_infos[idx].address == (*pos).address) 802 { 803 image_infos[idx].uuid = (*pos).uuid; 804 805 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 806 // one go later on. 807 808 ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL)); 809 if (unload_image_module_sp.get()) 810 { 811 UnloadImageLoadAddress (unload_image_module_sp.get(), image_infos[idx]); 812 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 813 } 814 else 815 { 816 if (log) 817 { 818 log->Printf ("Could not find module for unloading info entry:"); 819 image_infos[idx].PutToLog(log.get()); 820 } 821 } 822 823 // Then remove it from the m_dyld_image_infos: 824 825 m_dyld_image_infos.erase(pos); 826 break; 827 } 828 } 829 830 if (pos == end) 831 { 832 if (log) 833 { 834 log->Printf ("Could not find image_info entry for unloading image:"); 835 image_infos[idx].PutToLog(log.get()); 836 } 837 } 838 } 839 if (unloaded_module_list.GetSize() > 0) 840 { 841 if (log) 842 { 843 log->PutCString("Unloaded:"); 844 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 845 } 846 m_process->GetTarget().ModulesDidUnload (unloaded_module_list); 847 } 848 m_dyld_image_infos_stop_id = m_process->GetStopID(); 849 return true; 850} 851 852bool 853DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 854 uint32_t image_infos_count, 855 DYLDImageInfo::collection &image_infos) 856{ 857 const ByteOrder endian = m_dyld.GetByteOrder(); 858 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 859 860 image_infos.resize(image_infos_count); 861 const size_t count = image_infos.size() * 3 * addr_size; 862 DataBufferHeap info_data(count, 0); 863 Error error; 864 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 865 info_data.GetBytes(), 866 info_data.GetByteSize(), 867 error); 868 if (bytes_read == count) 869 { 870 uint32_t info_data_offset = 0; 871 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 872 for (int i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 873 { 874 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 875 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 876 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 877 878 char raw_path[PATH_MAX]; 879 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path)); 880 // don't resolve the path 881 const bool resolve_path = false; 882 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 883 } 884 return true; 885 } 886 else 887 { 888 return false; 889 } 890} 891 892//---------------------------------------------------------------------- 893// If we have found where the "_dyld_all_image_infos" lives in memory, 894// read the current info from it, and then update all image load 895// addresses (or lack thereof). Only do this if this is the first time 896// we're reading the dyld infos. Return true if we actually read anything, 897// and false otherwise. 898//---------------------------------------------------------------------- 899bool 900DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 901{ 902 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 903 904 Mutex::Locker locker(m_mutex); 905 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 906 || m_dyld_image_infos.size() != 0) 907 return false; 908 909 if (ReadAllImageInfosStructure ()) 910 { 911 if (m_dyld_all_image_infos.dylib_info_count > 0) 912 { 913 if (m_dyld_all_image_infos.dylib_info_addr == 0) 914 { 915 // DYLD is updating the images now. So we should say we have no images, and then we'll 916 // figure it out when we hit the added breakpoint. 917 return false; 918 } 919 else 920 { 921 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 922 m_dyld_all_image_infos.dylib_info_count)) 923 { 924 DEBUG_PRINTF( "unable to read all data for all_dylib_infos."); 925 m_dyld_image_infos.clear(); 926 } 927 } 928 } 929 return true; 930 } 931 else 932 return false; 933} 934 935//---------------------------------------------------------------------- 936// Read a mach_header at ADDR into HEADER, and also fill in the load 937// command data into LOAD_COMMAND_DATA if it is non-NULL. 938// 939// Returns true if we succeed, false if we fail for any reason. 940//---------------------------------------------------------------------- 941bool 942DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 943{ 944 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 945 Error error; 946 size_t bytes_read = m_process->ReadMemory (addr, 947 header_bytes.GetBytes(), 948 header_bytes.GetByteSize(), 949 error); 950 if (bytes_read == sizeof(llvm::MachO::mach_header)) 951 { 952 uint32_t offset = 0; 953 ::memset (header, 0, sizeof(header)); 954 955 // Get the magic byte unswapped so we can figure out what we are dealing with 956 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); 957 header->magic = data.GetU32(&offset); 958 lldb::addr_t load_cmd_addr = addr; 959 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 960 switch (header->magic) 961 { 962 case llvm::MachO::HeaderMagic32: 963 case llvm::MachO::HeaderMagic32Swapped: 964 data.SetAddressByteSize(4); 965 load_cmd_addr += sizeof(llvm::MachO::mach_header); 966 break; 967 968 case llvm::MachO::HeaderMagic64: 969 case llvm::MachO::HeaderMagic64Swapped: 970 data.SetAddressByteSize(8); 971 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 972 break; 973 974 default: 975 return false; 976 } 977 978 // Read the rest of dyld's mach header 979 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 980 { 981 if (load_command_data == NULL) 982 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 983 984 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 985 986 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 987 load_cmd_data_sp->GetBytes(), 988 load_cmd_data_sp->GetByteSize(), 989 error); 990 991 if (load_cmd_bytes_read == header->sizeofcmds) 992 { 993 // Set the load command data and also set the correct endian 994 // swap settings and the correct address size 995 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 996 load_command_data->SetByteOrder(data.GetByteOrder()); 997 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 998 return true; // We successfully read the mach_header and the load command data 999 } 1000 1001 return false; // We weren't able to read the load command data 1002 } 1003 } 1004 return false; // We failed the read the mach_header 1005} 1006 1007 1008//---------------------------------------------------------------------- 1009// Parse the load commands for an image 1010//---------------------------------------------------------------------- 1011uint32_t 1012DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker) 1013{ 1014 uint32_t offset = 0; 1015 uint32_t cmd_idx; 1016 Segment segment; 1017 dylib_info.Clear (true); 1018 1019 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 1020 { 1021 // Clear out any load command specific data from DYLIB_INFO since 1022 // we are about to read it. 1023 1024 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 1025 { 1026 llvm::MachO::load_command load_cmd; 1027 uint32_t load_cmd_offset = offset; 1028 load_cmd.cmd = data.GetU32 (&offset); 1029 load_cmd.cmdsize = data.GetU32 (&offset); 1030 switch (load_cmd.cmd) 1031 { 1032 case llvm::MachO::LoadCommandSegment32: 1033 { 1034 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1035 // We are putting 4 uint32_t values 4 uint64_t values so 1036 // we have to use multiple 32 bit gets below. 1037 segment.vmaddr = data.GetU32 (&offset); 1038 segment.vmsize = data.GetU32 (&offset); 1039 segment.fileoff = data.GetU32 (&offset); 1040 segment.filesize = data.GetU32 (&offset); 1041 // Extract maxprot, initprot, nsects and flags all at once 1042 data.GetU32(&offset, &segment.maxprot, 4); 1043 dylib_info.segments.push_back (segment); 1044 } 1045 break; 1046 1047 case llvm::MachO::LoadCommandSegment64: 1048 { 1049 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1050 // Extract vmaddr, vmsize, fileoff, and filesize all at once 1051 data.GetU64(&offset, &segment.vmaddr, 4); 1052 // Extract maxprot, initprot, nsects and flags all at once 1053 data.GetU32(&offset, &segment.maxprot, 4); 1054 dylib_info.segments.push_back (segment); 1055 } 1056 break; 1057 1058 case llvm::MachO::LoadCommandDynamicLinkerIdent: 1059 if (lc_id_dylinker) 1060 { 1061 uint32_t name_offset = load_cmd_offset + data.GetU32 (&offset); 1062 const char *path = data.PeekCStr (name_offset); 1063 lc_id_dylinker->SetFile (path, true); 1064 } 1065 break; 1066 1067 case llvm::MachO::LoadCommandUUID: 1068 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 1069 break; 1070 1071 default: 1072 break; 1073 } 1074 // Set offset to be the beginning of the next load command. 1075 offset = load_cmd_offset + load_cmd.cmdsize; 1076 } 1077 } 1078 1079 // All sections listed in the dyld image info structure will all 1080 // either be fixed up already, or they will all be off by a single 1081 // slide amount that is determined by finding the first segment 1082 // that is at file offset zero which also has bytes (a file size 1083 // that is greater than zero) in the object file. 1084 1085 // Determine the slide amount (if any) 1086 const size_t num_sections = dylib_info.segments.size(); 1087 for (size_t i = 0; i < num_sections; ++i) 1088 { 1089 // Iterate through the object file sections to find the 1090 // first section that starts of file offset zero and that 1091 // has bytes in the file... 1092 if (dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) 1093 { 1094 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 1095 // We have found the slide amount, so we can exit 1096 // this for loop. 1097 break; 1098 } 1099 } 1100 return cmd_idx; 1101} 1102 1103//---------------------------------------------------------------------- 1104// Read the mach_header and load commands for each image that the 1105// _dyld_all_image_infos structure points to and cache the results. 1106//---------------------------------------------------------------------- 1107 1108void 1109DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos, 1110 uint32_t infos_count, 1111 bool update_executable) 1112{ 1113 uint32_t exe_idx = UINT32_MAX; 1114 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 1115 // Read any UUID values that we can get 1116 for (uint32_t i = 0; i < infos_count; i++) 1117 { 1118 if (!image_infos[i].UUIDValid()) 1119 { 1120 DataExtractor data; // Load command data 1121 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1122 continue; 1123 1124 ParseLoadCommands (data, image_infos[i], NULL); 1125 1126 if (image_infos[i].header.filetype == llvm::MachO::HeaderFileTypeExecutable) 1127 exe_idx = i; 1128 1129 } 1130 } 1131 1132 if (exe_idx < image_infos.size()) 1133 { 1134 ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], false, NULL)); 1135 1136 if (!exe_module_sp) 1137 { 1138 ArchSpec exe_arch_spec (image_infos[exe_idx].GetArchitecture ()); 1139 exe_module_sp = m_process->GetTarget().GetSharedModule (image_infos[exe_idx].file_spec, 1140 exe_arch_spec, 1141 &image_infos[exe_idx].uuid); 1142 } 1143 1144 if (exe_module_sp) 1145 { 1146 if (exe_module_sp.get() != m_process->GetTarget().GetExecutableModule().get()) 1147 { 1148 // Don't load dependent images since we are in dyld where we will know 1149 // and find out about all images that are loaded 1150 bool get_dependent_images = false; 1151 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1152 get_dependent_images); 1153 } 1154 } 1155 } 1156} 1157 1158//---------------------------------------------------------------------- 1159// Dump a Segment to the file handle provided. 1160//---------------------------------------------------------------------- 1161void 1162DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const 1163{ 1164 if (log) 1165 { 1166 if (slide == 0) 1167 log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx)", 1168 name.AsCString(""), 1169 vmaddr + slide, 1170 vmaddr + slide + vmsize); 1171 else 1172 log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx) slide = 0x%llx", 1173 name.AsCString(""), 1174 vmaddr + slide, 1175 vmaddr + slide + vmsize, 1176 slide); 1177 } 1178} 1179 1180const DynamicLoaderMacOSXDYLD::Segment * 1181DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const 1182{ 1183 const size_t num_segments = segments.size(); 1184 for (size_t i=0; i<num_segments; ++i) 1185 { 1186 if (segments[i].name == name) 1187 return &segments[i]; 1188 } 1189 return NULL; 1190} 1191 1192 1193//---------------------------------------------------------------------- 1194// Dump an image info structure to the file handle provided. 1195//---------------------------------------------------------------------- 1196void 1197DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const 1198{ 1199 if (log == NULL) 1200 return; 1201 uint8_t *u = (uint8_t *)uuid.GetBytes(); 1202 1203 if (address == LLDB_INVALID_ADDRESS) 1204 { 1205 if (u) 1206 { 1207 log->Printf("\t modtime=0x%8.8llx uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s/%s' (UNLOADED)", 1208 mod_date, 1209 u[ 0], u[ 1], u[ 2], u[ 3], 1210 u[ 4], u[ 5], u[ 6], u[ 7], 1211 u[ 8], u[ 9], u[10], u[11], 1212 u[12], u[13], u[14], u[15], 1213 file_spec.GetDirectory().AsCString(), 1214 file_spec.GetFilename().AsCString()); 1215 } 1216 else 1217 log->Printf("\t modtime=0x%8.8llx path='%s/%s' (UNLOADED)", 1218 mod_date, 1219 file_spec.GetDirectory().AsCString(), 1220 file_spec.GetFilename().AsCString()); 1221 } 1222 else 1223 { 1224 if (u) 1225 { 1226 log->Printf("\taddress=0x%16.16llx modtime=0x%8.8llx uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X path='%s/%s'", 1227 address, 1228 mod_date, 1229 u[ 0], u[ 1], u[ 2], u[ 3], 1230 u[ 4], u[ 5], u[ 6], u[ 7], 1231 u[ 8], u[ 9], u[10], u[11], 1232 u[12], u[13], u[14], u[15], 1233 file_spec.GetDirectory().AsCString(), 1234 file_spec.GetFilename().AsCString()); 1235 } 1236 else 1237 { 1238 log->Printf("\taddress=0x%16.16llx modtime=0x%8.8llx path='%s/%s'", 1239 address, 1240 mod_date, 1241 file_spec.GetDirectory().AsCString(), 1242 file_spec.GetFilename().AsCString()); 1243 1244 } 1245 for (uint32_t i=0; i<segments.size(); ++i) 1246 segments[i].PutToLog(log, slide); 1247 } 1248} 1249 1250//---------------------------------------------------------------------- 1251// Dump the _dyld_all_image_infos members and all current image infos 1252// that we have parsed to the file handle provided. 1253//---------------------------------------------------------------------- 1254void 1255DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1256{ 1257 if (log == NULL) 1258 return; 1259 1260 Mutex::Locker locker(m_mutex); 1261 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8llx, notify=0x%8.8llx }", 1262 m_dyld_all_image_infos.version, 1263 m_dyld_all_image_infos.dylib_info_count, 1264 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1265 (uint64_t)m_dyld_all_image_infos.notification); 1266 size_t i; 1267 const size_t count = m_dyld_image_infos.size(); 1268 if (count > 0) 1269 { 1270 log->PutCString("Loaded:"); 1271 for (i = 0; i<count; i++) 1272 m_dyld_image_infos[i].PutToLog(log); 1273 } 1274} 1275 1276void 1277DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process) 1278{ 1279 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1280 Clear(true); 1281 m_process = process; 1282 m_process->GetTarget().GetSectionLoadList().Clear(); 1283} 1284 1285bool 1286DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1287{ 1288 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1289 if (m_break_id == LLDB_INVALID_BREAK_ID) 1290 { 1291 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1292 { 1293 Address so_addr; 1294 // Set the notification breakpoint and install a breakpoint 1295 // callback function that will get called each time the 1296 // breakpoint gets hit. We will use this to track when shared 1297 // libraries get loaded/unloaded. 1298 1299 if (m_process->GetTarget().GetSectionLoadList().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr)) 1300 { 1301 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true).get(); 1302 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1303 m_break_id = dyld_break->GetID(); 1304 } 1305 } 1306 } 1307 return m_break_id != LLDB_INVALID_BREAK_ID; 1308} 1309 1310//---------------------------------------------------------------------- 1311// Member function that gets called when the process state changes. 1312//---------------------------------------------------------------------- 1313void 1314DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state) 1315{ 1316 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s(%s)\n", __FUNCTION__, StateAsCString(state)); 1317 switch (state) 1318 { 1319 case eStateConnected: 1320 case eStateAttaching: 1321 case eStateLaunching: 1322 case eStateInvalid: 1323 case eStateUnloaded: 1324 case eStateExited: 1325 case eStateDetached: 1326 Clear(false); 1327 break; 1328 1329 case eStateStopped: 1330 // Keep trying find dyld and set our notification breakpoint each time 1331 // we stop until we succeed 1332 if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) 1333 { 1334 if (NeedToLocateDYLD ()) 1335 LocateDYLD (); 1336 1337 SetNotificationBreakpoint (); 1338 } 1339 break; 1340 1341 case eStateRunning: 1342 case eStateStepping: 1343 case eStateCrashed: 1344 case eStateSuspended: 1345 break; 1346 1347 default: 1348 break; 1349 } 1350} 1351 1352ThreadPlanSP 1353DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) 1354{ 1355 ThreadPlanSP thread_plan_sp; 1356 StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); 1357 const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); 1358 Symbol *current_symbol = current_context.symbol; 1359 LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1360 1361 if (current_symbol != NULL) 1362 { 1363 if (current_symbol->IsTrampoline()) 1364 { 1365 const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1366 1367 if (trampoline_name) 1368 { 1369 SymbolContextList target_symbols; 1370 ModuleList &images = thread.GetProcess().GetTarget().GetImages(); 1371 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, target_symbols); 1372 // FIXME - Make the Run to Address take multiple addresses, and 1373 // run to any of them. 1374 uint32_t num_symbols = target_symbols.GetSize(); 1375 if (num_symbols == 1) 1376 { 1377 SymbolContext context; 1378 AddressRange addr_range; 1379 if (target_symbols.GetContextAtIndex(0, context)) 1380 { 1381 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1382 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addr_range.GetBaseAddress(), stop_others)); 1383 } 1384 else 1385 { 1386 if (log) 1387 log->Printf ("Couldn't resolve the symbol context."); 1388 } 1389 } 1390 else if (num_symbols > 1) 1391 { 1392 std::vector<lldb::addr_t> addresses; 1393 addresses.resize (num_symbols); 1394 for (uint32_t i = 0; i < num_symbols; i++) 1395 { 1396 SymbolContext context; 1397 AddressRange addr_range; 1398 if (target_symbols.GetContextAtIndex(i, context)) 1399 { 1400 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1401 lldb::addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(&thread.GetProcess().GetTarget()); 1402 addresses[i] = load_addr; 1403 } 1404 } 1405 if (addresses.size() > 0) 1406 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addresses, stop_others)); 1407 else 1408 { 1409 if (log) 1410 log->Printf ("Couldn't resolve the symbol contexts."); 1411 } 1412 } 1413 else 1414 { 1415 if (log) 1416 { 1417 log->Printf ("Could not find symbol for trampoline target: \"%s\"", trampoline_name.AsCString()); 1418 } 1419 } 1420 } 1421 } 1422 } 1423 else 1424 { 1425 if (log) 1426 log->Printf ("Could not find symbol for step through."); 1427 } 1428 1429 return thread_plan_sp; 1430} 1431 1432Error 1433DynamicLoaderMacOSXDYLD::CanLoadImage () 1434{ 1435 Error error; 1436 // In order for us to tell if we can load a shared library we verify that 1437 // the dylib_info_addr isn't zero (which means no shared libraries have 1438 // been set yet, or dyld is currently mucking with the shared library list). 1439 if (ReadAllImageInfosStructure ()) 1440 { 1441 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1442 // TODO: check the malloc lock? 1443 // TODO: check the objective C lock? 1444 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1445 return error; // Success 1446 } 1447 1448 error.SetErrorString("unsafe to load or unload shared libraries"); 1449 return error; 1450} 1451 1452void 1453DynamicLoaderMacOSXDYLD::Initialize() 1454{ 1455 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1456 GetPluginDescriptionStatic(), 1457 CreateInstance); 1458} 1459 1460void 1461DynamicLoaderMacOSXDYLD::Terminate() 1462{ 1463 PluginManager::UnregisterPlugin (CreateInstance); 1464} 1465 1466 1467const char * 1468DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1469{ 1470 return "dynamic-loader.macosx-dyld"; 1471} 1472 1473const char * 1474DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1475{ 1476 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1477} 1478 1479 1480//------------------------------------------------------------------ 1481// PluginInterface protocol 1482//------------------------------------------------------------------ 1483const char * 1484DynamicLoaderMacOSXDYLD::GetPluginName() 1485{ 1486 return "DynamicLoaderMacOSXDYLD"; 1487} 1488 1489const char * 1490DynamicLoaderMacOSXDYLD::GetShortPluginName() 1491{ 1492 return GetPluginNameStatic(); 1493} 1494 1495uint32_t 1496DynamicLoaderMacOSXDYLD::GetPluginVersion() 1497{ 1498 return 1; 1499} 1500 1501