DynamicLoaderMacOSXDYLD.cpp revision 6fe03ce1dbc7fff934174ca8add96e6d72f0e126
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 create = true; 92 Module* exe_module = process->GetTarget().GetExecutableModule().get(); 93 if (exe_module) 94 { 95 ObjectFile *object_file = exe_module->GetObjectFile(); 96 if (object_file) 97 { 98 SectionList *section_list = object_file->GetSectionList(); 99 if (section_list) 100 { 101 static ConstString g_kld_section_name ("__KLD"); 102 if (section_list->FindSectionByName (g_kld_section_name)) 103 { 104 create = false; 105 } 106 } 107 } 108 } 109 110 if (create) 111 { 112 const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple(); 113 create = triple_ref.getOS() == llvm::Triple::Darwin && triple_ref.getVendor() == llvm::Triple::Apple; 114 } 115 } 116 117 if (create) 118 return new DynamicLoaderMacOSXDYLD (process); 119 return NULL; 120} 121 122//---------------------------------------------------------------------- 123// Constructor 124//---------------------------------------------------------------------- 125DynamicLoaderMacOSXDYLD::DynamicLoaderMacOSXDYLD (Process* process) : 126 DynamicLoader(process), 127 m_dyld(), 128 m_dyld_all_image_infos_addr(LLDB_INVALID_ADDRESS), 129 m_dyld_all_image_infos(), 130 m_dyld_all_image_infos_stop_id (UINT32_MAX), 131 m_break_id(LLDB_INVALID_BREAK_ID), 132 m_dyld_image_infos(), 133 m_dyld_image_infos_stop_id (UINT32_MAX), 134 m_mutex(Mutex::eMutexTypeRecursive) 135{ 136} 137 138//---------------------------------------------------------------------- 139// Destructor 140//---------------------------------------------------------------------- 141DynamicLoaderMacOSXDYLD::~DynamicLoaderMacOSXDYLD() 142{ 143 Clear(true); 144} 145 146//------------------------------------------------------------------ 147/// Called after attaching a process. 148/// 149/// Allow DynamicLoader plug-ins to execute some code after 150/// attaching to a process. 151//------------------------------------------------------------------ 152void 153DynamicLoaderMacOSXDYLD::DidAttach () 154{ 155 PrivateInitialize(m_process); 156 LocateDYLD (); 157 SetNotificationBreakpoint (); 158} 159 160//------------------------------------------------------------------ 161/// Called after attaching a process. 162/// 163/// Allow DynamicLoader plug-ins to execute some code after 164/// attaching to a process. 165//------------------------------------------------------------------ 166void 167DynamicLoaderMacOSXDYLD::DidLaunch () 168{ 169 PrivateInitialize(m_process); 170 LocateDYLD (); 171 SetNotificationBreakpoint (); 172} 173 174 175//---------------------------------------------------------------------- 176// Clear out the state of this class. 177//---------------------------------------------------------------------- 178void 179DynamicLoaderMacOSXDYLD::Clear (bool clear_process) 180{ 181 Mutex::Locker locker(m_mutex); 182 183 if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id)) 184 m_process->ClearBreakpointSiteByID(m_break_id); 185 186 if (clear_process) 187 m_process = NULL; 188 m_dyld.Clear(false); 189 m_dyld_all_image_infos_addr = LLDB_INVALID_ADDRESS; 190 m_dyld_all_image_infos.Clear(); 191 m_break_id = LLDB_INVALID_BREAK_ID; 192 m_dyld_image_infos.clear(); 193} 194 195//---------------------------------------------------------------------- 196// Check if we have found DYLD yet 197//---------------------------------------------------------------------- 198bool 199DynamicLoaderMacOSXDYLD::DidSetNotificationBreakpoint() const 200{ 201 return LLDB_BREAK_ID_IS_VALID (m_break_id); 202} 203 204//---------------------------------------------------------------------- 205// Try and figure out where dyld is by first asking the Process 206// if it knows (which currently calls down in the the lldb::Process 207// to get the DYLD info (available on SnowLeopard only). If that fails, 208// then check in the default addresses. 209//---------------------------------------------------------------------- 210bool 211DynamicLoaderMacOSXDYLD::LocateDYLD() 212{ 213 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS) 214 m_dyld_all_image_infos_addr = m_process->GetImageInfoAddress (); 215 216 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 217 { 218 if (ReadAllImageInfosStructure ()) 219 { 220 if (m_dyld_all_image_infos.dyldImageLoadAddress != LLDB_INVALID_ADDRESS) 221 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos.dyldImageLoadAddress); 222 else 223 return ReadDYLDInfoFromMemoryAndSetNotificationCallback (m_dyld_all_image_infos_addr & 0xfffffffffff00000ull); 224 } 225 } 226 227 // Check some default values 228 Module *executable = m_process->GetTarget().GetExecutableModule().get(); 229 230 if (executable) 231 { 232 if (executable->GetArchitecture().GetAddressByteSize() == 8) 233 { 234 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x7fff5fc00000ull); 235 } 236#if defined (__arm__) 237 else 238 { 239 ArchSpec arm_arch("arm"); 240 if (arm_arch == executable->Arch()) 241 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x2fe00000); 242 } 243#endif 244 return ReadDYLDInfoFromMemoryAndSetNotificationCallback(0x8fe00000); 245 } 246 return false; 247} 248 249ModuleSP 250DynamicLoaderMacOSXDYLD::FindTargetModuleForDYLDImageInfo (const DYLDImageInfo &image_info, bool can_create, bool *did_create_ptr) 251{ 252 if (did_create_ptr) 253 *did_create_ptr = false; 254 ModuleSP module_sp; 255 ModuleList &target_images = m_process->GetTarget().GetImages(); 256 const bool image_info_uuid_is_valid = image_info.uuid.IsValid(); 257 if (image_info_uuid_is_valid) 258 module_sp = target_images.FindModule(image_info.uuid); 259 260 if (!module_sp) 261 { 262 ArchSpec arch(image_info.GetArchitecture ()); 263 264 module_sp = target_images.FindFirstModuleForFileSpec (image_info.file_spec, &arch, NULL); 265 266 if (can_create && !module_sp) 267 { 268 module_sp = m_process->GetTarget().GetSharedModule (image_info.file_spec, 269 arch, 270 image_info_uuid_is_valid ? &image_info.uuid : NULL); 271 if (did_create_ptr) 272 *did_create_ptr = module_sp; 273 } 274 } 275 return module_sp; 276} 277 278//---------------------------------------------------------------------- 279// Assume that dyld is in memory at ADDR and try to parse it's load 280// commands 281//---------------------------------------------------------------------- 282bool 283DynamicLoaderMacOSXDYLD::ReadDYLDInfoFromMemoryAndSetNotificationCallback(lldb::addr_t addr) 284{ 285 DataExtractor data; // Load command data 286 if (ReadMachHeader (addr, &m_dyld.header, &data)) 287 { 288 if (m_dyld.header.filetype == llvm::MachO::HeaderFileTypeDynamicLinkEditor) 289 { 290 m_dyld.address = addr; 291 ModuleSP dyld_module_sp; 292 if (ParseLoadCommands (data, m_dyld, &m_dyld.file_spec)) 293 { 294 if (m_dyld.file_spec) 295 { 296 dyld_module_sp = FindTargetModuleForDYLDImageInfo (m_dyld, true, NULL); 297 298 if (dyld_module_sp) 299 UpdateImageLoadAddress (dyld_module_sp.get(), m_dyld); 300 } 301 } 302 303 if (m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS && dyld_module_sp.get()) 304 { 305 static ConstString g_dyld_all_image_infos ("dyld_all_image_infos"); 306 const Symbol *symbol = dyld_module_sp->FindFirstSymbolWithNameAndType (g_dyld_all_image_infos, eSymbolTypeData); 307 if (symbol) 308 m_dyld_all_image_infos_addr = symbol->GetValue().GetLoadAddress(&m_process->GetTarget()); 309 } 310 311 // Update all image infos 312 InitializeFromAllImageInfos (); 313 314 // If we didn't have an executable before, but now we do, then the 315 // dyld module shared pointer might be unique and we may need to add 316 // it again (since Target::SetExecutableModule() will clear the 317 // images). So append the dyld module back to the list if it is 318 /// unique! 319 if (dyld_module_sp && m_process->GetTarget().GetImages().AppendIfNeeded (dyld_module_sp)) 320 UpdateImageLoadAddress(dyld_module_sp.get(), m_dyld); 321 322 return true; 323 } 324 } 325 return false; 326} 327 328bool 329DynamicLoaderMacOSXDYLD::NeedToLocateDYLD () const 330{ 331 return m_dyld_all_image_infos_addr == LLDB_INVALID_ADDRESS; 332} 333 334bool 335DynamicLoaderMacOSXDYLD::UpdateCommPageLoadAddress(Module *module) 336{ 337 bool changed = false; 338 if (module) 339 { 340 ObjectFile *image_object_file = module->GetObjectFile(); 341 if (image_object_file) 342 { 343 SectionList *section_list = image_object_file->GetSectionList (); 344 if (section_list) 345 { 346 uint32_t num_sections = section_list->GetSize(); 347 for (uint32_t i=0; i<num_sections; ++i) 348 { 349 Section* section = section_list->GetSectionAtIndex (i).get(); 350 if (section) 351 { 352 const addr_t new_section_load_addr = section->GetFileAddress (); 353 const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section); 354 if (old_section_load_addr == LLDB_INVALID_ADDRESS || 355 old_section_load_addr != new_section_load_addr) 356 { 357 if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section, section->GetFileAddress ())) 358 changed = true; 359 } 360 } 361 } 362 } 363 } 364 } 365 return changed; 366} 367 368//---------------------------------------------------------------------- 369// Update the load addresses for all segments in MODULE using the 370// updated INFO that is passed in. 371//---------------------------------------------------------------------- 372bool 373DynamicLoaderMacOSXDYLD::UpdateImageLoadAddress (Module *module, DYLDImageInfo& info) 374{ 375 bool changed = false; 376 if (module) 377 { 378 ObjectFile *image_object_file = module->GetObjectFile(); 379 if (image_object_file) 380 { 381 SectionList *section_list = image_object_file->GetSectionList (); 382 if (section_list) 383 { 384 // We now know the slide amount, so go through all sections 385 // and update the load addresses with the correct values. 386 uint32_t num_segments = info.segments.size(); 387 for (uint32_t i=0; i<num_segments; ++i) 388 { 389 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 390 const addr_t new_section_load_addr = info.segments[i].vmaddr + info.slide; 391 if (section_sp) 392 { 393 const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section_sp.get()); 394 if (old_section_load_addr == LLDB_INVALID_ADDRESS || 395 old_section_load_addr != new_section_load_addr) 396 { 397 if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section_sp.get(), new_section_load_addr)) 398 changed = true; 399 } 400 } 401 else 402 { 403 fprintf (stderr, 404 "warning: unable to find and load segment named '%s' at 0x%llx in '%s/%s' in macosx dynamic loader plug-in.\n", 405 info.segments[i].name.AsCString("<invalid>"), 406 (uint64_t)new_section_load_addr, 407 image_object_file->GetFileSpec().GetDirectory().AsCString(), 408 image_object_file->GetFileSpec().GetFilename().AsCString()); 409 } 410 } 411 } 412 } 413 } 414 return changed; 415} 416 417//---------------------------------------------------------------------- 418// Update the load addresses for all segments in MODULE using the 419// updated INFO that is passed in. 420//---------------------------------------------------------------------- 421bool 422DynamicLoaderMacOSXDYLD::UnloadImageLoadAddress (Module *module, DYLDImageInfo& info) 423{ 424 bool changed = false; 425 if (module) 426 { 427 ObjectFile *image_object_file = module->GetObjectFile(); 428 if (image_object_file) 429 { 430 SectionList *section_list = image_object_file->GetSectionList (); 431 if (section_list) 432 { 433 uint32_t num_segments = info.segments.size(); 434 for (uint32_t i=0; i<num_segments; ++i) 435 { 436 SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name)); 437 if (section_sp) 438 { 439 const addr_t old_section_load_addr = info.segments[i].vmaddr + info.slide; 440 if (m_process->GetTarget().GetSectionLoadList().SetSectionUnloaded (section_sp.get(), old_section_load_addr)) 441 changed = true; 442 } 443 else 444 { 445 fprintf (stderr, 446 "warning: unable to find and unload segment named '%s' in '%s/%s' in macosx dynamic loader plug-in.\n", 447 info.segments[i].name.AsCString("<invalid>"), 448 image_object_file->GetFileSpec().GetDirectory().AsCString(), 449 image_object_file->GetFileSpec().GetFilename().AsCString()); 450 } 451 } 452 } 453 } 454 } 455 return changed; 456} 457 458 459//---------------------------------------------------------------------- 460// Static callback function that gets called when our DYLD notification 461// breakpoint gets hit. We update all of our image infos and then 462// let our super class DynamicLoader class decide if we should stop 463// or not (based on global preference). 464//---------------------------------------------------------------------- 465bool 466DynamicLoaderMacOSXDYLD::NotifyBreakpointHit (void *baton, 467 StoppointCallbackContext *context, 468 lldb::user_id_t break_id, 469 lldb::user_id_t break_loc_id) 470{ 471 // Let the event know that the images have changed 472 // DYLD passes three arguments to the notification breakpoint. 473 // Arg1: enum dyld_image_mode mode - 0 = adding, 1 = removing 474 // Arg2: uint32_t infoCount - Number of shared libraries added 475 // Arg3: dyld_image_info info[] - Array of structs of the form: 476 // const struct mach_header *imageLoadAddress 477 // const char *imageFilePath 478 // uintptr_t imageFileModDate (a time_t) 479 480 DynamicLoaderMacOSXDYLD* dyld_instance = (DynamicLoaderMacOSXDYLD*) baton; 481 482 // First step is to see if we've already initialized the all image infos. If we haven't then this function 483 // will do so and return true. In the course of initializing the all_image_infos it will read the complete 484 // current state, so we don't need to figure out what has changed from the data passed in to us. 485 486 if (dyld_instance->InitializeFromAllImageInfos()) 487 return dyld_instance->GetStopWhenImagesChange(); 488 489 Process *process = context->exe_ctx.process; 490 const lldb::ABISP &abi = process->GetABI(); 491 if (abi != NULL) 492 { 493 // Build up the value array to store the three arguments given above, then get the values from the ABI: 494 495 ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext(); 496 ValueList argument_values; 497 Value input_value; 498 499 void *clang_void_ptr_type = clang_ast_context->GetVoidPtrType(false); 500 void *clang_uint32_type = clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(lldb::eEncodingUint, 32); 501 input_value.SetValueType (Value::eValueTypeScalar); 502 input_value.SetContext (Value::eContextTypeClangType, clang_uint32_type); 503 argument_values.PushValue(input_value); 504 argument_values.PushValue(input_value); 505 input_value.SetContext (Value::eContextTypeClangType, clang_void_ptr_type); 506 argument_values.PushValue (input_value); 507 508 if (abi->GetArgumentValues (*context->exe_ctx.thread, argument_values)) 509 { 510 uint32_t dyld_mode = argument_values.GetValueAtIndex(0)->GetScalar().UInt (-1); 511 if (dyld_mode != -1) 512 { 513 // Okay the mode was right, now get the number of elements, and the array of new elements... 514 uint32_t image_infos_count = argument_values.GetValueAtIndex(1)->GetScalar().UInt (-1); 515 if (image_infos_count != -1) 516 { 517 // Got the number added, now go through the array of added elements, putting out the mach header 518 // address, and adding the image. 519 // Note, I'm not putting in logging here, since the AddModules & RemoveModules functions do 520 // all the logging internally. 521 522 lldb::addr_t image_infos_addr = argument_values.GetValueAtIndex(2)->GetScalar().ULongLong(); 523 if (dyld_mode == 0) 524 { 525 // This is add: 526 dyld_instance->AddModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 527 } 528 else 529 { 530 // This is remove: 531 dyld_instance->RemoveModulesUsingImageInfosAddress (image_infos_addr, image_infos_count); 532 } 533 534 } 535 } 536 } 537 } 538 539 // Return true to stop the target, false to just let the target run 540 return dyld_instance->GetStopWhenImagesChange(); 541} 542 543bool 544DynamicLoaderMacOSXDYLD::ReadAllImageInfosStructure () 545{ 546 Mutex::Locker locker(m_mutex); 547 548 // the all image infos is already valid for this process stop ID 549 if (m_process->GetStopID() == m_dyld_all_image_infos_stop_id) 550 return true; 551 552 m_dyld_all_image_infos.Clear(); 553 if (m_dyld_all_image_infos_addr != LLDB_INVALID_ADDRESS) 554 { 555 ByteOrder byte_order = m_process->GetTarget().GetArchitecture().GetByteOrder(); 556 uint32_t addr_size = 4; 557 if (m_dyld_all_image_infos_addr > UINT32_MAX) 558 addr_size = 8; 559 560 uint8_t buf[256]; 561 DataExtractor data (buf, sizeof(buf), byte_order, addr_size); 562 uint32_t offset = 0; 563 564 const size_t count_v2 = sizeof (uint32_t) + // version 565 sizeof (uint32_t) + // infoArrayCount 566 addr_size + // infoArray 567 addr_size + // notification 568 addr_size + // processDetachedFromSharedRegion + libSystemInitialized + pad 569 addr_size; // dyldImageLoadAddress 570 const size_t count_v11 = count_v2 + 571 addr_size + // jitInfo 572 addr_size + // dyldVersion 573 addr_size + // errorMessage 574 addr_size + // terminationFlags 575 addr_size + // coreSymbolicationShmPage 576 addr_size + // systemOrderFlag 577 addr_size + // uuidArrayCount 578 addr_size + // uuidArray 579 addr_size + // dyldAllImageInfosAddress 580 addr_size + // initialImageCount 581 addr_size + // errorKind 582 addr_size + // errorClientOfDylibPath 583 addr_size + // errorTargetDylibPath 584 addr_size; // errorSymbol 585 assert (sizeof (buf) >= count_v11); 586 587 int count; 588 Error error; 589 if (m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, 4, error) == 4) 590 { 591 m_dyld_all_image_infos.version = data.GetU32(&offset); 592 // If anything in the high byte is set, we probably got the byte 593 // order incorrect (the process might not have it set correctly 594 // yet due to attaching to a program without a specified file). 595 if (m_dyld_all_image_infos.version & 0xff000000) 596 { 597 // We have guessed the wrong byte order. Swap it and try 598 // reading the version again. 599 if (byte_order == eByteOrderLittle) 600 byte_order = eByteOrderBig; 601 else 602 byte_order = eByteOrderLittle; 603 604 data.SetByteOrder (byte_order); 605 offset = 0; 606 m_dyld_all_image_infos.version = data.GetU32(&offset); 607 } 608 } 609 else 610 { 611 return false; 612 } 613 614 if (m_dyld_all_image_infos.version >= 11) 615 count = count_v11; 616 else 617 count = count_v2; 618 619 const size_t bytes_read = m_process->ReadMemory (m_dyld_all_image_infos_addr, buf, count, error); 620 if (bytes_read == count) 621 { 622 offset = 0; 623 m_dyld_all_image_infos.version = data.GetU32(&offset); 624 m_dyld_all_image_infos.dylib_info_count = data.GetU32(&offset); 625 m_dyld_all_image_infos.dylib_info_addr = data.GetPointer(&offset); 626 m_dyld_all_image_infos.notification = data.GetPointer(&offset); 627 m_dyld_all_image_infos.processDetachedFromSharedRegion = data.GetU8(&offset); 628 m_dyld_all_image_infos.libSystemInitialized = data.GetU8(&offset); 629 // Adjust for padding. 630 offset += addr_size - 2; 631 m_dyld_all_image_infos.dyldImageLoadAddress = data.GetPointer(&offset); 632 if (m_dyld_all_image_infos.version >= 11) 633 { 634 offset += addr_size * 8; 635 uint64_t dyld_all_image_infos_addr = data.GetPointer(&offset); 636 637 // When we started, we were given the actual address of the all_image_infos 638 // struct (probably via TASK_DYLD_INFO) in memory - this address is stored in 639 // m_dyld_all_image_infos_addr and is the most accurate address we have. 640 641 // We read the dyld_all_image_infos struct from memory; it contains its own address. 642 // If the address in the struct does not match the actual address, 643 // the dyld we're looking at has been loaded at a different location (slid) from 644 // where it intended to load. The addresses in the dyld_all_image_infos struct 645 // are the original, non-slid addresses, and need to be adjusted. Most importantly 646 // the address of dyld and the notification address need to be adjusted. 647 648 if (dyld_all_image_infos_addr != m_dyld_all_image_infos_addr) 649 { 650 uint64_t image_infos_offset = dyld_all_image_infos_addr - m_dyld_all_image_infos.dyldImageLoadAddress; 651 uint64_t notification_offset = m_dyld_all_image_infos.notification - m_dyld_all_image_infos.dyldImageLoadAddress; 652 m_dyld_all_image_infos.dyldImageLoadAddress = m_dyld_all_image_infos_addr - image_infos_offset; 653 m_dyld_all_image_infos.notification = m_dyld_all_image_infos.dyldImageLoadAddress + notification_offset; 654 } 655 } 656 m_dyld_all_image_infos_stop_id = m_process->GetStopID(); 657 return true; 658 } 659 } 660 return false; 661} 662 663 664bool 665DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 666{ 667 DYLDImageInfo::collection image_infos; 668 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 669 if (log) 670 log->Printf ("Adding %d modules.\n"); 671 672 Mutex::Locker locker(m_mutex); 673 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 674 return true; 675 676 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 677 return false; 678 679 UpdateImageInfosHeaderAndLoadCommands (image_infos, image_infos_count, false); 680 bool return_value = AddModulesUsingImageInfos (image_infos); 681 m_dyld_image_infos_stop_id = m_process->GetStopID(); 682 return return_value; 683} 684 685// Adds the modules in image_infos to m_dyld_image_infos. 686// NB don't call this passing in m_dyld_image_infos. 687 688bool 689DynamicLoaderMacOSXDYLD::AddModulesUsingImageInfos (DYLDImageInfo::collection &image_infos) 690{ 691 // Now add these images to the main list. 692 ModuleList loaded_module_list; 693 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 694 695 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 696 { 697 if (log) 698 { 699 log->Printf ("Adding new image at address=0x%16.16llx.", image_infos[idx].address); 700 image_infos[idx].PutToLog (log.get()); 701 } 702 703 m_dyld_image_infos.push_back(image_infos[idx]); 704 705 ModuleSP image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], true, NULL)); 706 707 if (image_module_sp) 708 { 709 if (image_infos[idx].header.filetype == llvm::MachO::HeaderFileTypeDynamicLinkEditor) 710 image_module_sp->SetIsDynamicLinkEditor (true); 711 712 ObjectFile *objfile = image_module_sp->GetObjectFile (); 713 if (objfile) 714 { 715 SectionList *sections = objfile->GetSectionList(); 716 if (sections) 717 { 718 ConstString commpage_dbstr("__commpage"); 719 Section *commpage_section = sections->FindSectionByName(commpage_dbstr).get(); 720 if (commpage_section) 721 { 722 ModuleList& target_images = m_process->GetTarget().GetImages(); 723 const FileSpec objfile_file_spec = objfile->GetFileSpec(); 724 ArchSpec arch (image_infos[idx].GetArchitecture ()); 725 ModuleSP commpage_image_module_sp(target_images.FindFirstModuleForFileSpec (objfile_file_spec, 726 &arch, 727 &commpage_dbstr)); 728 if (!commpage_image_module_sp) 729 { 730 commpage_image_module_sp 731 = m_process->GetTarget().GetSharedModule (image_infos[idx].file_spec, 732 arch, 733 NULL, 734 &commpage_dbstr, 735 objfile->GetOffset() + commpage_section->GetFileOffset()); 736 } 737 if (commpage_image_module_sp) 738 UpdateCommPageLoadAddress (commpage_image_module_sp.get()); 739 } 740 } 741 } 742 743 // UpdateImageLoadAddress will return true if any segments 744 // change load address. We need to check this so we don't 745 // mention that all loaded shared libraries are newly loaded 746 // each time we hit out dyld breakpoint since dyld will list all 747 // shared libraries each time. 748 if (UpdateImageLoadAddress (image_module_sp.get(), image_infos[idx])) 749 { 750 loaded_module_list.AppendIfNeeded (image_module_sp); 751 } 752 } 753 } 754 755 if (loaded_module_list.GetSize() > 0) 756 { 757 // FIXME: This should really be in the Runtime handlers class, which should get 758 // called by the target's ModulesDidLoad, but we're doing it all locally for now 759 // to save time. 760 // Also, I'm assuming there can be only one libobjc dylib loaded... 761 762 ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime(); 763 if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary()) 764 { 765 size_t num_modules = loaded_module_list.GetSize(); 766 for (int i = 0; i < num_modules; i++) 767 { 768 if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i))) 769 { 770 objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i)); 771 break; 772 } 773 } 774 } 775 if (log) 776 loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidLoad"); 777 m_process->GetTarget().ModulesDidLoad (loaded_module_list); 778 } 779 return true; 780} 781 782bool 783DynamicLoaderMacOSXDYLD::RemoveModulesUsingImageInfosAddress (lldb::addr_t image_infos_addr, uint32_t image_infos_count) 784{ 785 DYLDImageInfo::collection image_infos; 786 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 787 788 Mutex::Locker locker(m_mutex); 789 if (m_process->GetStopID() == m_dyld_image_infos_stop_id) 790 return true; 791 792 // First read in the image_infos for the removed modules, and their headers & load commands. 793 if (!ReadImageInfos (image_infos_addr, image_infos_count, image_infos)) 794 { 795 if (log) 796 log->PutCString ("Failed reading image infos array."); 797 return false; 798 } 799 800 if (log) 801 log->Printf ("Removing %d modules.", image_infos_count); 802 803 ModuleList unloaded_module_list; 804 for (uint32_t idx = 0; idx < image_infos.size(); ++idx) 805 { 806 if (log) 807 { 808 log->Printf ("Removing module at address=0x%16.16llx.", image_infos[idx].address); 809 image_infos[idx].PutToLog (log.get()); 810 } 811 812 // Remove this image_infos from the m_all_image_infos. We do the comparision by address 813 // rather than by file spec because we can have many modules with the same "file spec" in the 814 // case that they are modules loaded from memory. 815 // 816 // Also copy over the uuid from the old entry to the removed entry so we can 817 // use it to lookup the module in the module list. 818 819 DYLDImageInfo::collection::iterator pos, end = m_dyld_image_infos.end(); 820 for (pos = m_dyld_image_infos.begin(); pos != end; pos++) 821 { 822 if (image_infos[idx].address == (*pos).address) 823 { 824 image_infos[idx].uuid = (*pos).uuid; 825 826 // Add the module from this image_info to the "unloaded_module_list". We'll remove them all at 827 // one go later on. 828 829 ModuleSP unload_image_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[idx], false, NULL)); 830 if (unload_image_module_sp.get()) 831 { 832 UnloadImageLoadAddress (unload_image_module_sp.get(), image_infos[idx]); 833 unloaded_module_list.AppendIfNeeded (unload_image_module_sp); 834 } 835 else 836 { 837 if (log) 838 { 839 log->Printf ("Could not find module for unloading info entry:"); 840 image_infos[idx].PutToLog(log.get()); 841 } 842 } 843 844 // Then remove it from the m_dyld_image_infos: 845 846 m_dyld_image_infos.erase(pos); 847 break; 848 } 849 } 850 851 if (pos == end) 852 { 853 if (log) 854 { 855 log->Printf ("Could not find image_info entry for unloading image:"); 856 image_infos[idx].PutToLog(log.get()); 857 } 858 } 859 } 860 if (unloaded_module_list.GetSize() > 0) 861 { 862 if (log) 863 { 864 log->PutCString("Unloaded:"); 865 unloaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderMacOSXDYLD::ModulesDidUnload"); 866 } 867 m_process->GetTarget().ModulesDidUnload (unloaded_module_list); 868 } 869 m_dyld_image_infos_stop_id = m_process->GetStopID(); 870 return true; 871} 872 873bool 874DynamicLoaderMacOSXDYLD::ReadImageInfos (lldb::addr_t image_infos_addr, 875 uint32_t image_infos_count, 876 DYLDImageInfo::collection &image_infos) 877{ 878 const ByteOrder endian = m_dyld.GetByteOrder(); 879 const uint32_t addr_size = m_dyld.GetAddressByteSize(); 880 881 image_infos.resize(image_infos_count); 882 const size_t count = image_infos.size() * 3 * addr_size; 883 DataBufferHeap info_data(count, 0); 884 Error error; 885 const size_t bytes_read = m_process->ReadMemory (image_infos_addr, 886 info_data.GetBytes(), 887 info_data.GetByteSize(), 888 error); 889 if (bytes_read == count) 890 { 891 uint32_t info_data_offset = 0; 892 DataExtractor info_data_ref(info_data.GetBytes(), info_data.GetByteSize(), endian, addr_size); 893 for (int i = 0; i < image_infos.size() && info_data_ref.ValidOffset(info_data_offset); i++) 894 { 895 image_infos[i].address = info_data_ref.GetPointer(&info_data_offset); 896 lldb::addr_t path_addr = info_data_ref.GetPointer(&info_data_offset); 897 image_infos[i].mod_date = info_data_ref.GetPointer(&info_data_offset); 898 899 char raw_path[PATH_MAX]; 900 m_process->ReadCStringFromMemory (path_addr, raw_path, sizeof(raw_path)); 901 // don't resolve the path 902 const bool resolve_path = false; 903 image_infos[i].file_spec.SetFile(raw_path, resolve_path); 904 } 905 return true; 906 } 907 else 908 { 909 return false; 910 } 911} 912 913//---------------------------------------------------------------------- 914// If we have found where the "_dyld_all_image_infos" lives in memory, 915// read the current info from it, and then update all image load 916// addresses (or lack thereof). Only do this if this is the first time 917// we're reading the dyld infos. Return true if we actually read anything, 918// and false otherwise. 919//---------------------------------------------------------------------- 920bool 921DynamicLoaderMacOSXDYLD::InitializeFromAllImageInfos () 922{ 923 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 924 925 Mutex::Locker locker(m_mutex); 926 if (m_process->GetStopID() == m_dyld_image_infos_stop_id 927 || m_dyld_image_infos.size() != 0) 928 return false; 929 930 if (ReadAllImageInfosStructure ()) 931 { 932 if (m_dyld_all_image_infos.dylib_info_count > 0) 933 { 934 if (m_dyld_all_image_infos.dylib_info_addr == 0) 935 { 936 // DYLD is updating the images now. So we should say we have no images, and then we'll 937 // figure it out when we hit the added breakpoint. 938 return false; 939 } 940 else 941 { 942 if (!AddModulesUsingImageInfosAddress (m_dyld_all_image_infos.dylib_info_addr, 943 m_dyld_all_image_infos.dylib_info_count)) 944 { 945 DEBUG_PRINTF( "unable to read all data for all_dylib_infos."); 946 m_dyld_image_infos.clear(); 947 } 948 } 949 } 950 return true; 951 } 952 else 953 return false; 954} 955 956//---------------------------------------------------------------------- 957// Read a mach_header at ADDR into HEADER, and also fill in the load 958// command data into LOAD_COMMAND_DATA if it is non-NULL. 959// 960// Returns true if we succeed, false if we fail for any reason. 961//---------------------------------------------------------------------- 962bool 963DynamicLoaderMacOSXDYLD::ReadMachHeader (lldb::addr_t addr, llvm::MachO::mach_header *header, DataExtractor *load_command_data) 964{ 965 DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0); 966 Error error; 967 size_t bytes_read = m_process->ReadMemory (addr, 968 header_bytes.GetBytes(), 969 header_bytes.GetByteSize(), 970 error); 971 if (bytes_read == sizeof(llvm::MachO::mach_header)) 972 { 973 uint32_t offset = 0; 974 ::memset (header, 0, sizeof(llvm::MachO::mach_header)); 975 976 // Get the magic byte unswapped so we can figure out what we are dealing with 977 DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), lldb::endian::InlHostByteOrder(), 4); 978 header->magic = data.GetU32(&offset); 979 lldb::addr_t load_cmd_addr = addr; 980 data.SetByteOrder(DynamicLoaderMacOSXDYLD::GetByteOrderFromMagic(header->magic)); 981 switch (header->magic) 982 { 983 case llvm::MachO::HeaderMagic32: 984 case llvm::MachO::HeaderMagic32Swapped: 985 data.SetAddressByteSize(4); 986 load_cmd_addr += sizeof(llvm::MachO::mach_header); 987 break; 988 989 case llvm::MachO::HeaderMagic64: 990 case llvm::MachO::HeaderMagic64Swapped: 991 data.SetAddressByteSize(8); 992 load_cmd_addr += sizeof(llvm::MachO::mach_header_64); 993 break; 994 995 default: 996 return false; 997 } 998 999 // Read the rest of dyld's mach header 1000 if (data.GetU32(&offset, &header->cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1)) 1001 { 1002 if (load_command_data == NULL) 1003 return true; // We were able to read the mach_header and weren't asked to read the load command bytes 1004 1005 DataBufferSP load_cmd_data_sp(new DataBufferHeap(header->sizeofcmds, 0)); 1006 1007 size_t load_cmd_bytes_read = m_process->ReadMemory (load_cmd_addr, 1008 load_cmd_data_sp->GetBytes(), 1009 load_cmd_data_sp->GetByteSize(), 1010 error); 1011 1012 if (load_cmd_bytes_read == header->sizeofcmds) 1013 { 1014 // Set the load command data and also set the correct endian 1015 // swap settings and the correct address size 1016 load_command_data->SetData(load_cmd_data_sp, 0, header->sizeofcmds); 1017 load_command_data->SetByteOrder(data.GetByteOrder()); 1018 load_command_data->SetAddressByteSize(data.GetAddressByteSize()); 1019 return true; // We successfully read the mach_header and the load command data 1020 } 1021 1022 return false; // We weren't able to read the load command data 1023 } 1024 } 1025 return false; // We failed the read the mach_header 1026} 1027 1028 1029//---------------------------------------------------------------------- 1030// Parse the load commands for an image 1031//---------------------------------------------------------------------- 1032uint32_t 1033DynamicLoaderMacOSXDYLD::ParseLoadCommands (const DataExtractor& data, DYLDImageInfo& dylib_info, FileSpec *lc_id_dylinker) 1034{ 1035 uint32_t offset = 0; 1036 uint32_t cmd_idx; 1037 Segment segment; 1038 dylib_info.Clear (true); 1039 1040 for (cmd_idx = 0; cmd_idx < dylib_info.header.ncmds; cmd_idx++) 1041 { 1042 // Clear out any load command specific data from DYLIB_INFO since 1043 // we are about to read it. 1044 1045 if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command))) 1046 { 1047 llvm::MachO::load_command load_cmd; 1048 uint32_t load_cmd_offset = offset; 1049 load_cmd.cmd = data.GetU32 (&offset); 1050 load_cmd.cmdsize = data.GetU32 (&offset); 1051 switch (load_cmd.cmd) 1052 { 1053 case llvm::MachO::LoadCommandSegment32: 1054 { 1055 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1056 // We are putting 4 uint32_t values 4 uint64_t values so 1057 // we have to use multiple 32 bit gets below. 1058 segment.vmaddr = data.GetU32 (&offset); 1059 segment.vmsize = data.GetU32 (&offset); 1060 segment.fileoff = data.GetU32 (&offset); 1061 segment.filesize = data.GetU32 (&offset); 1062 // Extract maxprot, initprot, nsects and flags all at once 1063 data.GetU32(&offset, &segment.maxprot, 4); 1064 dylib_info.segments.push_back (segment); 1065 } 1066 break; 1067 1068 case llvm::MachO::LoadCommandSegment64: 1069 { 1070 segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16); 1071 // Extract vmaddr, vmsize, fileoff, and filesize all at once 1072 data.GetU64(&offset, &segment.vmaddr, 4); 1073 // Extract maxprot, initprot, nsects and flags all at once 1074 data.GetU32(&offset, &segment.maxprot, 4); 1075 dylib_info.segments.push_back (segment); 1076 } 1077 break; 1078 1079 case llvm::MachO::LoadCommandDynamicLinkerIdent: 1080 if (lc_id_dylinker) 1081 { 1082 uint32_t name_offset = load_cmd_offset + data.GetU32 (&offset); 1083 const char *path = data.PeekCStr (name_offset); 1084 lc_id_dylinker->SetFile (path, true); 1085 } 1086 break; 1087 1088 case llvm::MachO::LoadCommandUUID: 1089 dylib_info.uuid.SetBytes(data.GetData (&offset, 16)); 1090 break; 1091 1092 default: 1093 break; 1094 } 1095 // Set offset to be the beginning of the next load command. 1096 offset = load_cmd_offset + load_cmd.cmdsize; 1097 } 1098 } 1099 1100 // All sections listed in the dyld image info structure will all 1101 // either be fixed up already, or they will all be off by a single 1102 // slide amount that is determined by finding the first segment 1103 // that is at file offset zero which also has bytes (a file size 1104 // that is greater than zero) in the object file. 1105 1106 // Determine the slide amount (if any) 1107 const size_t num_sections = dylib_info.segments.size(); 1108 for (size_t i = 0; i < num_sections; ++i) 1109 { 1110 // Iterate through the object file sections to find the 1111 // first section that starts of file offset zero and that 1112 // has bytes in the file... 1113 if (dylib_info.segments[i].fileoff == 0 && dylib_info.segments[i].filesize > 0) 1114 { 1115 dylib_info.slide = dylib_info.address - dylib_info.segments[i].vmaddr; 1116 // We have found the slide amount, so we can exit 1117 // this for loop. 1118 break; 1119 } 1120 } 1121 return cmd_idx; 1122} 1123 1124//---------------------------------------------------------------------- 1125// Read the mach_header and load commands for each image that the 1126// _dyld_all_image_infos structure points to and cache the results. 1127//---------------------------------------------------------------------- 1128 1129void 1130DynamicLoaderMacOSXDYLD::UpdateImageInfosHeaderAndLoadCommands(DYLDImageInfo::collection &image_infos, 1131 uint32_t infos_count, 1132 bool update_executable) 1133{ 1134 uint32_t exe_idx = UINT32_MAX; 1135 LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER)); 1136 // Read any UUID values that we can get 1137 for (uint32_t i = 0; i < infos_count; i++) 1138 { 1139 if (!image_infos[i].UUIDValid()) 1140 { 1141 DataExtractor data; // Load command data 1142 if (!ReadMachHeader (image_infos[i].address, &image_infos[i].header, &data)) 1143 continue; 1144 1145 ParseLoadCommands (data, image_infos[i], NULL); 1146 1147 if (image_infos[i].header.filetype == llvm::MachO::HeaderFileTypeExecutable) 1148 exe_idx = i; 1149 1150 } 1151 } 1152 1153 if (exe_idx < image_infos.size()) 1154 { 1155 ModuleSP exe_module_sp (FindTargetModuleForDYLDImageInfo (image_infos[exe_idx], false, NULL)); 1156 1157 if (!exe_module_sp) 1158 { 1159 ArchSpec exe_arch_spec (image_infos[exe_idx].GetArchitecture ()); 1160 exe_module_sp = m_process->GetTarget().GetSharedModule (image_infos[exe_idx].file_spec, 1161 exe_arch_spec, 1162 &image_infos[exe_idx].uuid); 1163 } 1164 1165 if (exe_module_sp) 1166 { 1167 if (exe_module_sp.get() != m_process->GetTarget().GetExecutableModule().get()) 1168 { 1169 // Don't load dependent images since we are in dyld where we will know 1170 // and find out about all images that are loaded 1171 bool get_dependent_images = false; 1172 m_process->GetTarget().SetExecutableModule (exe_module_sp, 1173 get_dependent_images); 1174 } 1175 } 1176 } 1177} 1178 1179//---------------------------------------------------------------------- 1180// Dump a Segment to the file handle provided. 1181//---------------------------------------------------------------------- 1182void 1183DynamicLoaderMacOSXDYLD::Segment::PutToLog (Log *log, lldb::addr_t slide) const 1184{ 1185 if (log) 1186 { 1187 if (slide == 0) 1188 log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx)", 1189 name.AsCString(""), 1190 vmaddr + slide, 1191 vmaddr + slide + vmsize); 1192 else 1193 log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx) slide = 0x%llx", 1194 name.AsCString(""), 1195 vmaddr + slide, 1196 vmaddr + slide + vmsize, 1197 slide); 1198 } 1199} 1200 1201const DynamicLoaderMacOSXDYLD::Segment * 1202DynamicLoaderMacOSXDYLD::DYLDImageInfo::FindSegment (const ConstString &name) const 1203{ 1204 const size_t num_segments = segments.size(); 1205 for (size_t i=0; i<num_segments; ++i) 1206 { 1207 if (segments[i].name == name) 1208 return &segments[i]; 1209 } 1210 return NULL; 1211} 1212 1213 1214//---------------------------------------------------------------------- 1215// Dump an image info structure to the file handle provided. 1216//---------------------------------------------------------------------- 1217void 1218DynamicLoaderMacOSXDYLD::DYLDImageInfo::PutToLog (Log *log) const 1219{ 1220 if (log == NULL) 1221 return; 1222 uint8_t *u = (uint8_t *)uuid.GetBytes(); 1223 1224 if (address == LLDB_INVALID_ADDRESS) 1225 { 1226 if (u) 1227 { 1228 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)", 1229 mod_date, 1230 u[ 0], u[ 1], u[ 2], u[ 3], 1231 u[ 4], u[ 5], u[ 6], u[ 7], 1232 u[ 8], u[ 9], u[10], u[11], 1233 u[12], u[13], u[14], u[15], 1234 file_spec.GetDirectory().AsCString(), 1235 file_spec.GetFilename().AsCString()); 1236 } 1237 else 1238 log->Printf("\t modtime=0x%8.8llx path='%s/%s' (UNLOADED)", 1239 mod_date, 1240 file_spec.GetDirectory().AsCString(), 1241 file_spec.GetFilename().AsCString()); 1242 } 1243 else 1244 { 1245 if (u) 1246 { 1247 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'", 1248 address, 1249 mod_date, 1250 u[ 0], u[ 1], u[ 2], u[ 3], 1251 u[ 4], u[ 5], u[ 6], u[ 7], 1252 u[ 8], u[ 9], u[10], u[11], 1253 u[12], u[13], u[14], u[15], 1254 file_spec.GetDirectory().AsCString(), 1255 file_spec.GetFilename().AsCString()); 1256 } 1257 else 1258 { 1259 log->Printf("\taddress=0x%16.16llx modtime=0x%8.8llx path='%s/%s'", 1260 address, 1261 mod_date, 1262 file_spec.GetDirectory().AsCString(), 1263 file_spec.GetFilename().AsCString()); 1264 1265 } 1266 for (uint32_t i=0; i<segments.size(); ++i) 1267 segments[i].PutToLog(log, slide); 1268 } 1269} 1270 1271//---------------------------------------------------------------------- 1272// Dump the _dyld_all_image_infos members and all current image infos 1273// that we have parsed to the file handle provided. 1274//---------------------------------------------------------------------- 1275void 1276DynamicLoaderMacOSXDYLD::PutToLog(Log *log) const 1277{ 1278 if (log == NULL) 1279 return; 1280 1281 Mutex::Locker locker(m_mutex); 1282 log->Printf("dyld_all_image_infos = { version=%d, count=%d, addr=0x%8.8llx, notify=0x%8.8llx }", 1283 m_dyld_all_image_infos.version, 1284 m_dyld_all_image_infos.dylib_info_count, 1285 (uint64_t)m_dyld_all_image_infos.dylib_info_addr, 1286 (uint64_t)m_dyld_all_image_infos.notification); 1287 size_t i; 1288 const size_t count = m_dyld_image_infos.size(); 1289 if (count > 0) 1290 { 1291 log->PutCString("Loaded:"); 1292 for (i = 0; i<count; i++) 1293 m_dyld_image_infos[i].PutToLog(log); 1294 } 1295} 1296 1297void 1298DynamicLoaderMacOSXDYLD::PrivateInitialize(Process *process) 1299{ 1300 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1301 Clear(true); 1302 m_process = process; 1303 m_process->GetTarget().GetSectionLoadList().Clear(); 1304} 1305 1306bool 1307DynamicLoaderMacOSXDYLD::SetNotificationBreakpoint () 1308{ 1309 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState())); 1310 if (m_break_id == LLDB_INVALID_BREAK_ID) 1311 { 1312 if (m_dyld_all_image_infos.notification != LLDB_INVALID_ADDRESS) 1313 { 1314 Address so_addr; 1315 // Set the notification breakpoint and install a breakpoint 1316 // callback function that will get called each time the 1317 // breakpoint gets hit. We will use this to track when shared 1318 // libraries get loaded/unloaded. 1319 1320 if (m_process->GetTarget().GetSectionLoadList().ResolveLoadAddress(m_dyld_all_image_infos.notification, so_addr)) 1321 { 1322 Breakpoint *dyld_break = m_process->GetTarget().CreateBreakpoint (so_addr, true).get(); 1323 dyld_break->SetCallback (DynamicLoaderMacOSXDYLD::NotifyBreakpointHit, this, true); 1324 m_break_id = dyld_break->GetID(); 1325 } 1326 } 1327 } 1328 return m_break_id != LLDB_INVALID_BREAK_ID; 1329} 1330 1331//---------------------------------------------------------------------- 1332// Member function that gets called when the process state changes. 1333//---------------------------------------------------------------------- 1334void 1335DynamicLoaderMacOSXDYLD::PrivateProcessStateChanged (Process *process, StateType state) 1336{ 1337 DEBUG_PRINTF("DynamicLoaderMacOSXDYLD::%s(%s)\n", __FUNCTION__, StateAsCString(state)); 1338 switch (state) 1339 { 1340 case eStateConnected: 1341 case eStateAttaching: 1342 case eStateLaunching: 1343 case eStateInvalid: 1344 case eStateUnloaded: 1345 case eStateExited: 1346 case eStateDetached: 1347 Clear(false); 1348 break; 1349 1350 case eStateStopped: 1351 // Keep trying find dyld and set our notification breakpoint each time 1352 // we stop until we succeed 1353 if (!DidSetNotificationBreakpoint () && m_process->IsAlive()) 1354 { 1355 if (NeedToLocateDYLD ()) 1356 LocateDYLD (); 1357 1358 SetNotificationBreakpoint (); 1359 } 1360 break; 1361 1362 case eStateRunning: 1363 case eStateStepping: 1364 case eStateCrashed: 1365 case eStateSuspended: 1366 break; 1367 1368 default: 1369 break; 1370 } 1371} 1372 1373ThreadPlanSP 1374DynamicLoaderMacOSXDYLD::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others) 1375{ 1376 ThreadPlanSP thread_plan_sp; 1377 StackFrame *current_frame = thread.GetStackFrameAtIndex(0).get(); 1378 const SymbolContext ¤t_context = current_frame->GetSymbolContext(eSymbolContextSymbol); 1379 Symbol *current_symbol = current_context.symbol; 1380 LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP)); 1381 1382 if (current_symbol != NULL) 1383 { 1384 if (current_symbol->IsTrampoline()) 1385 { 1386 const ConstString &trampoline_name = current_symbol->GetMangled().GetName(Mangled::ePreferMangled); 1387 1388 if (trampoline_name) 1389 { 1390 SymbolContextList target_symbols; 1391 ModuleList &images = thread.GetProcess().GetTarget().GetImages(); 1392 images.FindSymbolsWithNameAndType(trampoline_name, eSymbolTypeCode, target_symbols); 1393 // FIXME - Make the Run to Address take multiple addresses, and 1394 // run to any of them. 1395 uint32_t num_symbols = target_symbols.GetSize(); 1396 if (num_symbols == 1) 1397 { 1398 SymbolContext context; 1399 AddressRange addr_range; 1400 if (target_symbols.GetContextAtIndex(0, context)) 1401 { 1402 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1403 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addr_range.GetBaseAddress(), stop_others)); 1404 } 1405 else 1406 { 1407 if (log) 1408 log->Printf ("Couldn't resolve the symbol context."); 1409 } 1410 } 1411 else if (num_symbols > 1) 1412 { 1413 std::vector<lldb::addr_t> addresses; 1414 addresses.resize (num_symbols); 1415 for (uint32_t i = 0; i < num_symbols; i++) 1416 { 1417 SymbolContext context; 1418 AddressRange addr_range; 1419 if (target_symbols.GetContextAtIndex(i, context)) 1420 { 1421 context.GetAddressRange (eSymbolContextEverything, 0, false, addr_range); 1422 lldb::addr_t load_addr = addr_range.GetBaseAddress().GetLoadAddress(&thread.GetProcess().GetTarget()); 1423 addresses[i] = load_addr; 1424 } 1425 } 1426 if (addresses.size() > 0) 1427 thread_plan_sp.reset (new ThreadPlanRunToAddress (thread, addresses, stop_others)); 1428 else 1429 { 1430 if (log) 1431 log->Printf ("Couldn't resolve the symbol contexts."); 1432 } 1433 } 1434 else 1435 { 1436 if (log) 1437 { 1438 log->Printf ("Could not find symbol for trampoline target: \"%s\"", trampoline_name.AsCString()); 1439 } 1440 } 1441 } 1442 } 1443 } 1444 else 1445 { 1446 if (log) 1447 log->Printf ("Could not find symbol for step through."); 1448 } 1449 1450 return thread_plan_sp; 1451} 1452 1453Error 1454DynamicLoaderMacOSXDYLD::CanLoadImage () 1455{ 1456 Error error; 1457 // In order for us to tell if we can load a shared library we verify that 1458 // the dylib_info_addr isn't zero (which means no shared libraries have 1459 // been set yet, or dyld is currently mucking with the shared library list). 1460 if (ReadAllImageInfosStructure ()) 1461 { 1462 // TODO: also check the _dyld_global_lock_held variable in libSystem.B.dylib? 1463 // TODO: check the malloc lock? 1464 // TODO: check the objective C lock? 1465 if (m_dyld_all_image_infos.dylib_info_addr != 0) 1466 return error; // Success 1467 } 1468 1469 error.SetErrorString("unsafe to load or unload shared libraries"); 1470 return error; 1471} 1472 1473void 1474DynamicLoaderMacOSXDYLD::Initialize() 1475{ 1476 PluginManager::RegisterPlugin (GetPluginNameStatic(), 1477 GetPluginDescriptionStatic(), 1478 CreateInstance); 1479} 1480 1481void 1482DynamicLoaderMacOSXDYLD::Terminate() 1483{ 1484 PluginManager::UnregisterPlugin (CreateInstance); 1485} 1486 1487 1488const char * 1489DynamicLoaderMacOSXDYLD::GetPluginNameStatic() 1490{ 1491 return "dynamic-loader.macosx-dyld"; 1492} 1493 1494const char * 1495DynamicLoaderMacOSXDYLD::GetPluginDescriptionStatic() 1496{ 1497 return "Dynamic loader plug-in that watches for shared library loads/unloads in MacOSX user processes."; 1498} 1499 1500 1501//------------------------------------------------------------------ 1502// PluginInterface protocol 1503//------------------------------------------------------------------ 1504const char * 1505DynamicLoaderMacOSXDYLD::GetPluginName() 1506{ 1507 return "DynamicLoaderMacOSXDYLD"; 1508} 1509 1510const char * 1511DynamicLoaderMacOSXDYLD::GetShortPluginName() 1512{ 1513 return GetPluginNameStatic(); 1514} 1515 1516uint32_t 1517DynamicLoaderMacOSXDYLD::GetPluginVersion() 1518{ 1519 return 1; 1520} 1521 1522