lldb/source/Core/Section.cpp

   1 //===-- Section.cpp -------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "lldb/Core/Section.h"
  10 #include "lldb/Core/Address.h"
  11 #include "lldb/Core/Module.h"
  12 #include "lldb/Symbol/ObjectFile.h"
  13 #include "lldb/Target/SectionLoadList.h"
  14 #include "lldb/Target/Target.h"
  15 #include "lldb/Utility/FileSpec.h"
  16 #include "lldb/Utility/VMRange.h"
  17
  18 #include <cinttypes>
  19 #include <limits>
  20 #include <utility>
  21
  22 namespace lldb_private {
  23 class DataExtractor;
  24 }
  25 using namespace lldb;
  26 using namespace lldb_private;
  27
  28 const char *Section::GetTypeAsCString() const {
  29   switch (m_type) {
  30   case eSectionTypeInvalid:
  31     return "invalid";
  32   case eSectionTypeCode:
  33     return "code";
  34   case eSectionTypeContainer:
  35     return "container";
  36   case eSectionTypeData:
  37     return "data";
  38   case eSectionTypeDataCString:
  39     return "data-cstr";
  40   case eSectionTypeDataCStringPointers:
  41     return "data-cstr-ptr";
  42   case eSectionTypeDataSymbolAddress:
  43     return "data-symbol-addr";
  44   case eSectionTypeData4:
  45     return "data-4-byte";
  46   case eSectionTypeData8:
  47     return "data-8-byte";
  48   case eSectionTypeData16:
  49     return "data-16-byte";
  50   case eSectionTypeDataPointers:
  51     return "data-ptrs";
  52   case eSectionTypeDebug:
  53     return "debug";
  54   case eSectionTypeZeroFill:
  55     return "zero-fill";
  56   case eSectionTypeDataObjCMessageRefs:
  57     return "objc-message-refs";
  58   case eSectionTypeDataObjCCFStrings:
  59     return "objc-cfstrings";
  60   case eSectionTypeDWARFDebugAbbrev:
  61     return "dwarf-abbrev";
  62   case eSectionTypeDWARFDebugAbbrevDwo:
  63     return "dwarf-abbrev-dwo";
  64   case eSectionTypeDWARFDebugAddr:
  65     return "dwarf-addr";
  66   case eSectionTypeDWARFDebugAranges:
  67     return "dwarf-aranges";
  68   case eSectionTypeDWARFDebugCuIndex:
  69     return "dwarf-cu-index";
  70   case eSectionTypeDWARFDebugTuIndex:
  71     return "dwarf-tu-index";
  72   case eSectionTypeDWARFDebugFrame:
  73     return "dwarf-frame";
  74   case eSectionTypeDWARFDebugInfo:
  75     return "dwarf-info";
  76   case eSectionTypeDWARFDebugInfoDwo:
  77     return "dwarf-info-dwo";
  78   case eSectionTypeDWARFDebugLine:
  79     return "dwarf-line";
  80   case eSectionTypeDWARFDebugLineStr:
  81     return "dwarf-line-str";
  82   case eSectionTypeDWARFDebugLoc:
  83     return "dwarf-loc";
  84   case eSectionTypeDWARFDebugLocDwo:
  85     return "dwarf-loc-dwo";
  86   case eSectionTypeDWARFDebugLocLists:
  87     return "dwarf-loclists";
  88   case eSectionTypeDWARFDebugLocListsDwo:
  89     return "dwarf-loclists-dwo";
  90   case eSectionTypeDWARFDebugMacInfo:
  91     return "dwarf-macinfo";
  92   case eSectionTypeDWARFDebugMacro:
  93     return "dwarf-macro";
  94   case eSectionTypeDWARFDebugPubNames:
  95     return "dwarf-pubnames";
  96   case eSectionTypeDWARFDebugPubTypes:
  97     return "dwarf-pubtypes";
  98   case eSectionTypeDWARFDebugRanges:
  99     return "dwarf-ranges";
 100   case eSectionTypeDWARFDebugRngLists:
 101     return "dwarf-rnglists";
 102   case eSectionTypeDWARFDebugRngListsDwo:
 103     return "dwarf-rnglists-dwo";
 104   case eSectionTypeDWARFDebugStr:
 105     return "dwarf-str";
 106   case eSectionTypeDWARFDebugStrDwo:
 107     return "dwarf-str-dwo";
 108   case eSectionTypeDWARFDebugStrOffsets:
 109     return "dwarf-str-offsets";
 110   case eSectionTypeDWARFDebugStrOffsetsDwo:
 111     return "dwarf-str-offsets-dwo";
 112   case eSectionTypeDWARFDebugTypes:
 113     return "dwarf-types";
 114   case eSectionTypeDWARFDebugTypesDwo:
 115     return "dwarf-types-dwo";
 116   case eSectionTypeDWARFDebugNames:
 117     return "dwarf-names";
 118   case eSectionTypeELFSymbolTable:
 119     return "elf-symbol-table";
 120   case eSectionTypeELFDynamicSymbols:
 121     return "elf-dynamic-symbols";
 122   case eSectionTypeELFRelocationEntries:
 123     return "elf-relocation-entries";
 124   case eSectionTypeELFDynamicLinkInfo:
 125     return "elf-dynamic-link-info";
 126   case eSectionTypeDWARFAppleNames:
 127     return "apple-names";
 128   case eSectionTypeDWARFAppleTypes:
 129     return "apple-types";
 130   case eSectionTypeDWARFAppleNamespaces:
 131     return "apple-namespaces";
 132   case eSectionTypeDWARFAppleObjC:
 133     return "apple-objc";
 134   case eSectionTypeEHFrame:
 135     return "eh-frame";
 136   case eSectionTypeARMexidx:
 137     return "ARM.exidx";
 138   case eSectionTypeARMextab:
 139     return "ARM.extab";
 140   case eSectionTypeCompactUnwind:
 141     return "compact-unwind";
 142   case eSectionTypeGoSymtab:
 143     return "go-symtab";
 144   case eSectionTypeAbsoluteAddress:
 145     return "absolute";
 146   case eSectionTypeDWARFGNUDebugAltLink:
 147     return "dwarf-gnu-debugaltlink";
 148   case eSectionTypeCTF:
 149     return "ctf";
 150   case eSectionTypeOther:
 151     return "regular";
 152   case eSectionTypeSwiftModules:
 153     return "swift-modules";
 154   }
 155   return "unknown";
 156 }
 157
 158 Section::Section(const ModuleSP &module_sp, ObjectFile *obj_file,
 159                  user_id_t sect_id, ConstString name,
 160                  SectionType sect_type, addr_t file_addr, addr_t byte_size,
 161                  lldb::offset_t file_offset, lldb::offset_t file_size,
 162                  uint32_t log2align, uint32_t flags,
 163                  uint32_t target_byte_size /*=1*/)
 164     : ModuleChild(module_sp), UserID(sect_id), Flags(flags),
 165       m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
 166       m_file_addr(file_addr), m_byte_size(byte_size),
 167       m_file_offset(file_offset), m_file_size(file_size),
 168       m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
 169       m_thread_specific(false), m_readable(false), m_writable(false),
 170       m_executable(false), m_relocated(false), m_target_byte_size(target_byte_size) {
 171 }
 172
 173 Section::Section(const lldb::SectionSP &parent_section_sp,
 174                  const ModuleSP &module_sp, ObjectFile *obj_file,
 175                  user_id_t sect_id, ConstString name,
 176                  SectionType sect_type, addr_t file_addr, addr_t byte_size,
 177                  lldb::offset_t file_offset, lldb::offset_t file_size,
 178                  uint32_t log2align, uint32_t flags,
 179                  uint32_t target_byte_size /*=1*/)
 180     : ModuleChild(module_sp), UserID(sect_id), Flags(flags),
 181       m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
 182       m_file_addr(file_addr), m_byte_size(byte_size),
 183       m_file_offset(file_offset), m_file_size(file_size),
 184       m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
 185       m_thread_specific(false), m_readable(false), m_writable(false),
 186       m_executable(false), m_relocated(false), m_target_byte_size(target_byte_size) {
 187   if (parent_section_sp)
 188     m_parent_wp = parent_section_sp;
 189 }
 190
 191 Section::~Section() = default;
 192
 193 addr_t Section::GetFileAddress() const {
 194   SectionSP parent_sp(GetParent());
 195   if (parent_sp) {
 196     // This section has a parent which means m_file_addr is an offset into the
 197     // parent section, so the file address for this section is the file address
 198     // of the parent plus the offset
 199     return parent_sp->GetFileAddress() + m_file_addr;
 200   }
 201   // This section has no parent, so m_file_addr is the file base address
 202   return m_file_addr;
 203 }
 204
 205 bool Section::SetFileAddress(lldb::addr_t file_addr) {
 206   SectionSP parent_sp(GetParent());
 207   if (parent_sp) {
 208     if (m_file_addr >= file_addr)
 209       return parent_sp->SetFileAddress(m_file_addr - file_addr);
 210     return false;
 211   } else {
 212     // This section has no parent, so m_file_addr is the file base address
 213     m_file_addr = file_addr;
 214     return true;
 215   }
 216 }
 217
 218 lldb::addr_t Section::GetOffset() const {
 219   // This section has a parent which means m_file_addr is an offset.
 220   SectionSP parent_sp(GetParent());
 221   if (parent_sp)
 222     return m_file_addr;
 223
 224   // This section has no parent, so there is no offset to be had
 225   return 0;
 226 }
 227
 228 addr_t Section::GetLoadBaseAddress(Target *target) const {
 229   addr_t load_base_addr = LLDB_INVALID_ADDRESS;
 230   SectionSP parent_sp(GetParent());
 231   if (parent_sp) {
 232     load_base_addr = parent_sp->GetLoadBaseAddress(target);
 233     if (load_base_addr != LLDB_INVALID_ADDRESS)
 234       load_base_addr += GetOffset();
 235   }
 236   if (load_base_addr == LLDB_INVALID_ADDRESS) {
 237     load_base_addr = target->GetSectionLoadList().GetSectionLoadAddress(
 238         const_cast<Section *>(this)->shared_from_this());
 239   }
 240   return load_base_addr;
 241 }
 242
 243 bool Section::ResolveContainedAddress(addr_t offset, Address &so_addr,
 244                                       bool allow_section_end) const {
 245   const size_t num_children = m_children.GetSize();
 246   for (size_t i = 0; i < num_children; i++) {
 247     Section *child_section = m_children.GetSectionAtIndex(i).get();
 248
 249     addr_t child_offset = child_section->GetOffset();
 250     if (child_offset <= offset &&
 251         offset - child_offset <
 252             child_section->GetByteSize() + (allow_section_end ? 1 : 0))
 253       return child_section->ResolveContainedAddress(offset - child_offset,
 254                                                     so_addr, allow_section_end);
 255   }
 256   so_addr.SetOffset(offset);
 257   so_addr.SetSection(const_cast<Section *>(this)->shared_from_this());
 258
 259   // Ensure that there are no orphaned (i.e., moduleless) sections.
 260   assert(GetModule().get());
 261   return true;
 262 }
 263
 264 bool Section::ContainsFileAddress(addr_t vm_addr) const {
 265   const addr_t file_addr = GetFileAddress();
 266   if (file_addr != LLDB_INVALID_ADDRESS && !IsThreadSpecific()) {
 267     if (file_addr <= vm_addr) {
 268       const addr_t offset = (vm_addr - file_addr) * m_target_byte_size;
 269       return offset < GetByteSize();
 270     }
 271   }
 272   return false;
 273 }
 274
 275 void Section::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
 276                    uint32_t depth) const {
 277   s.indent(indent);
 278   s << llvm::format("0x%8.8" PRIx64 " %-16s ", GetID(), GetTypeAsCString());
 279   bool resolved = true;
 280   addr_t addr = LLDB_INVALID_ADDRESS;
 281
 282   if (GetByteSize() == 0)
 283     s.indent(39);
 284   else {
 285     if (target)
 286       addr = GetLoadBaseAddress(target);
 287
 288     if (addr == LLDB_INVALID_ADDRESS) {
 289       if (target)
 290         resolved = false;
 291       addr = GetFileAddress();
 292     }
 293
 294     VMRange range(addr, addr + m_byte_size);
 295     range.Dump(s, 0);
 296   }
 297
 298   s << llvm::format("%c %c%c%c  0x%8.8" PRIx64 " 0x%8.8" PRIx64 " 0x%8.8x ",
 299                     resolved ? ' ' : '*', m_readable ? 'r' : '-',
 300                     m_writable ? 'w' : '-', m_executable ? 'x' : '-',
 301                     m_file_offset, m_file_size, Get());
 302
 303   DumpName(s);
 304
 305   s << "\n";
 306
 307   if (depth > 0)
 308     m_children.Dump(s, indent, target, false, depth - 1);
 309 }
 310
 311 void Section::DumpName(llvm::raw_ostream &s) const {
 312   SectionSP parent_sp(GetParent());
 313   if (parent_sp) {
 314     parent_sp->DumpName(s);
 315     s << '.';
 316   } else {
 317     // The top most section prints the module basename
 318     const char *name = nullptr;
 319     ModuleSP module_sp(GetModule());
 320
 321     if (m_obj_file) {
 322       const FileSpec &file_spec = m_obj_file->GetFileSpec();
 323       name = file_spec.GetFilename().AsCString();
 324     }
 325     if ((!name || !name[0]) && module_sp)
 326       name = module_sp->GetFileSpec().GetFilename().AsCString();
 327     if (name && name[0])
 328       s << name << '.';
 329   }
 330   s << m_name;
 331 }
 332
 333 bool Section::IsDescendant(const Section *section) {
 334   if (this == section)
 335     return true;
 336   SectionSP parent_sp(GetParent());
 337   if (parent_sp)
 338     return parent_sp->IsDescendant(section);
 339   return false;
 340 }
 341
 342 bool Section::Slide(addr_t slide_amount, bool slide_children) {
 343   if (m_file_addr != LLDB_INVALID_ADDRESS) {
 344     if (slide_amount == 0)
 345       return true;
 346
 347     m_file_addr += slide_amount;
 348
 349     if (slide_children)
 350       m_children.Slide(slide_amount, slide_children);
 351
 352     return true;
 353   }
 354   return false;
 355 }
 356
 357 /// Get the permissions as OR'ed bits from lldb::Permissions
 358 uint32_t Section::GetPermissions() const {
 359   uint32_t permissions = 0;
 360   if (m_readable)
 361     permissions |= ePermissionsReadable;
 362   if (m_writable)
 363     permissions |= ePermissionsWritable;
 364   if (m_executable)
 365     permissions |= ePermissionsExecutable;
 366   return permissions;
 367 }
 368
 369 /// Set the permissions using bits OR'ed from lldb::Permissions
 370 void Section::SetPermissions(uint32_t permissions) {
 371   m_readable = (permissions & ePermissionsReadable) != 0;
 372   m_writable = (permissions & ePermissionsWritable) != 0;
 373   m_executable = (permissions & ePermissionsExecutable) != 0;
 374 }
 375
 376 lldb::offset_t Section::GetSectionData(void *dst, lldb::offset_t dst_len,
 377                                        lldb::offset_t offset) {
 378   if (m_obj_file)
 379     return m_obj_file->ReadSectionData(this, offset, dst, dst_len);
 380   return 0;
 381 }
 382
 383 lldb::offset_t Section::GetSectionData(DataExtractor &section_data) {
 384   if (m_obj_file)
 385     return m_obj_file->ReadSectionData(this, section_data);
 386   return 0;
 387 }
 388
 389 bool Section::ContainsOnlyDebugInfo() const {
 390   switch (m_type) {
 391   case eSectionTypeInvalid:
 392   case eSectionTypeCode:
 393   case eSectionTypeContainer:
 394   case eSectionTypeData:
 395   case eSectionTypeDataCString:
 396   case eSectionTypeDataCStringPointers:
 397   case eSectionTypeDataSymbolAddress:
 398   case eSectionTypeData4:
 399   case eSectionTypeData8:
 400   case eSectionTypeData16:
 401   case eSectionTypeDataPointers:
 402   case eSectionTypeZeroFill:
 403   case eSectionTypeDataObjCMessageRefs:
 404   case eSectionTypeDataObjCCFStrings:
 405   case eSectionTypeELFSymbolTable:
 406   case eSectionTypeELFDynamicSymbols:
 407   case eSectionTypeELFRelocationEntries:
 408   case eSectionTypeELFDynamicLinkInfo:
 409   case eSectionTypeEHFrame:
 410   case eSectionTypeARMexidx:
 411   case eSectionTypeARMextab:
 412   case eSectionTypeCompactUnwind:
 413   case eSectionTypeGoSymtab:
 414   case eSectionTypeAbsoluteAddress:
 415   case eSectionTypeOther:
 416   // Used for "__dof_cache" in mach-o or ".debug" for COFF which isn't debug
 417   // information that we parse at all. This was causing system files with no
 418   // debug info to show debug info byte sizes in the "statistics dump" output
 419   // for each module. New "eSectionType" enums should be created for dedicated
 420   // debug info that has a predefined format if we wish for these sections to
 421   // show up as debug info.
 422   case eSectionTypeDebug:
 423     return false;
 424
 425   case eSectionTypeDWARFDebugAbbrev:
 426   case eSectionTypeDWARFDebugAbbrevDwo:
 427   case eSectionTypeDWARFDebugAddr:
 428   case eSectionTypeDWARFDebugAranges:
 429   case eSectionTypeDWARFDebugCuIndex:
 430   case eSectionTypeDWARFDebugTuIndex:
 431   case eSectionTypeDWARFDebugFrame:
 432   case eSectionTypeDWARFDebugInfo:
 433   case eSectionTypeDWARFDebugInfoDwo:
 434   case eSectionTypeDWARFDebugLine:
 435   case eSectionTypeDWARFDebugLineStr:
 436   case eSectionTypeDWARFDebugLoc:
 437   case eSectionTypeDWARFDebugLocDwo:
 438   case eSectionTypeDWARFDebugLocLists:
 439   case eSectionTypeDWARFDebugLocListsDwo:
 440   case eSectionTypeDWARFDebugMacInfo:
 441   case eSectionTypeDWARFDebugMacro:
 442   case eSectionTypeDWARFDebugPubNames:
 443   case eSectionTypeDWARFDebugPubTypes:
 444   case eSectionTypeDWARFDebugRanges:
 445   case eSectionTypeDWARFDebugRngLists:
 446   case eSectionTypeDWARFDebugRngListsDwo:
 447   case eSectionTypeDWARFDebugStr:
 448   case eSectionTypeDWARFDebugStrDwo:
 449   case eSectionTypeDWARFDebugStrOffsets:
 450   case eSectionTypeDWARFDebugStrOffsetsDwo:
 451   case eSectionTypeDWARFDebugTypes:
 452   case eSectionTypeDWARFDebugTypesDwo:
 453   case eSectionTypeDWARFDebugNames:
 454   case eSectionTypeDWARFAppleNames:
 455   case eSectionTypeDWARFAppleTypes:
 456   case eSectionTypeDWARFAppleNamespaces:
 457   case eSectionTypeDWARFAppleObjC:
 458   case eSectionTypeDWARFGNUDebugAltLink:
 459   case eSectionTypeCTF:
 460   case eSectionTypeSwiftModules:
 461     return true;
 462   }
 463   return false;
 464 }
 465
 466
 467 #pragma mark SectionList
 468
 469 SectionList &SectionList::operator=(const SectionList &rhs) {
 470   if (this != &rhs)
 471     m_sections = rhs.m_sections;
 472   return *this;
 473 }
 474
 475 size_t SectionList::AddSection(const lldb::SectionSP &section_sp) {
 476   if (section_sp) {
 477     size_t section_index = m_sections.size();
 478     m_sections.push_back(section_sp);
 479     return section_index;
 480   }
 481
 482   return std::numeric_limits<size_t>::max();
 483 }
 484
 485 // Warning, this can be slow as it's removing items from a std::vector.
 486 bool SectionList::DeleteSection(size_t idx) {
 487   if (idx < m_sections.size()) {
 488     m_sections.erase(m_sections.begin() + idx);
 489     return true;
 490   }
 491   return false;
 492 }
 493
 494 size_t SectionList::FindSectionIndex(const Section *sect) {
 495   iterator sect_iter;
 496   iterator begin = m_sections.begin();
 497   iterator end = m_sections.end();
 498   for (sect_iter = begin; sect_iter != end; ++sect_iter) {
 499     if (sect_iter->get() == sect) {
 500       // The secton was already in this section list
 501       return std::distance(begin, sect_iter);
 502     }
 503   }
 504   return UINT32_MAX;
 505 }
 506
 507 size_t SectionList::AddUniqueSection(const lldb::SectionSP &sect_sp) {
 508   size_t sect_idx = FindSectionIndex(sect_sp.get());
 509   if (sect_idx == UINT32_MAX) {
 510     sect_idx = AddSection(sect_sp);
 511   }
 512   return sect_idx;
 513 }
 514
 515 bool SectionList::ReplaceSection(user_id_t sect_id,
 516                                  const lldb::SectionSP &sect_sp,
 517                                  uint32_t depth) {
 518   iterator sect_iter, end = m_sections.end();
 519   for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
 520     if ((*sect_iter)->GetID() == sect_id) {
 521       *sect_iter = sect_sp;
 522       return true;
 523     } else if (depth > 0) {
 524       if ((*sect_iter)
 525               ->GetChildren()
 526               .ReplaceSection(sect_id, sect_sp, depth - 1))
 527         return true;
 528     }
 529   }
 530   return false;
 531 }
 532
 533 size_t SectionList::GetNumSections(uint32_t depth) const {
 534   size_t count = m_sections.size();
 535   if (depth > 0) {
 536     const_iterator sect_iter, end = m_sections.end();
 537     for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
 538       count += (*sect_iter)->GetChildren().GetNumSections(depth - 1);
 539     }
 540   }
 541   return count;
 542 }
 543
 544 SectionSP SectionList::GetSectionAtIndex(size_t idx) const {
 545   SectionSP sect_sp;
 546   if (idx < m_sections.size())
 547     sect_sp = m_sections[idx];
 548   return sect_sp;
 549 }
 550
 551 SectionSP
 552 SectionList::FindSectionByName(ConstString section_dstr) const {
 553   SectionSP sect_sp;
 554   // Check if we have a valid section string
 555   if (section_dstr && !m_sections.empty()) {
 556     const_iterator sect_iter;
 557     const_iterator end = m_sections.end();
 558     for (sect_iter = m_sections.begin();
 559          sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
 560       Section *child_section = sect_iter->get();
 561       if (child_section) {
 562         if (child_section->GetName() == section_dstr) {
 563           sect_sp = *sect_iter;
 564         } else {
 565           sect_sp =
 566               child_section->GetChildren().FindSectionByName(section_dstr);
 567         }
 568       }
 569     }
 570   }
 571   return sect_sp;
 572 }
 573
 574 SectionSP SectionList::FindSectionByID(user_id_t sect_id) const {
 575   SectionSP sect_sp;
 576   if (sect_id) {
 577     const_iterator sect_iter;
 578     const_iterator end = m_sections.end();
 579     for (sect_iter = m_sections.begin();
 580          sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
 581       if ((*sect_iter)->GetID() == sect_id) {
 582         sect_sp = *sect_iter;
 583         break;
 584       } else {
 585         sect_sp = (*sect_iter)->GetChildren().FindSectionByID(sect_id);
 586       }
 587     }
 588   }
 589   return sect_sp;
 590 }
 591
 592 SectionSP SectionList::FindSectionByType(SectionType sect_type,
 593                                          bool check_children,
 594                                          size_t start_idx) const {
 595   SectionSP sect_sp;
 596   size_t num_sections = m_sections.size();
 597   for (size_t idx = start_idx; idx < num_sections; ++idx) {
 598     if (m_sections[idx]->GetType() == sect_type) {
 599       sect_sp = m_sections[idx];
 600       break;
 601     } else if (check_children) {
 602       sect_sp = m_sections[idx]->GetChildren().FindSectionByType(
 603           sect_type, check_children, 0);
 604       if (sect_sp)
 605         break;
 606     }
 607   }
 608   return sect_sp;
 609 }
 610
 611 SectionSP SectionList::FindSectionContainingFileAddress(addr_t vm_addr,
 612                                                         uint32_t depth) const {
 613   SectionSP sect_sp;
 614   const_iterator sect_iter;
 615   const_iterator end = m_sections.end();
 616   for (sect_iter = m_sections.begin();
 617        sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
 618     Section *sect = sect_iter->get();
 619     if (sect->ContainsFileAddress(vm_addr)) {
 620       // The file address is in this section. We need to make sure one of our
 621       // child sections doesn't contain this address as well as obeying the
 622       // depth limit that was passed in.
 623       if (depth > 0)
 624         sect_sp = sect->GetChildren().FindSectionContainingFileAddress(
 625             vm_addr, depth - 1);
 626
 627       if (sect_sp.get() == nullptr && !sect->IsFake())
 628         sect_sp = *sect_iter;
 629     }
 630   }
 631   return sect_sp;
 632 }
 633
 634 bool SectionList::ContainsSection(user_id_t sect_id) const {
 635   return FindSectionByID(sect_id).get() != nullptr;
 636 }
 637
 638 void SectionList::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
 639                        bool show_header, uint32_t depth) const {
 640   bool target_has_loaded_sections =
 641       target && !target->GetSectionLoadList().IsEmpty();
 642   if (show_header && !m_sections.empty()) {
 643     s.indent(indent);
 644     s << llvm::formatv(
 645         "SectID     Type             {0} Address                          "
 646         "   Perm File Off.  File Size  Flags "
 647         "     Section Name\n",
 648         target_has_loaded_sections ? "Load" : "File");
 649     s.indent(indent);
 650     s << "---------- ---------------- "
 651          "---------------------------------------  ---- ---------- "
 652          "---------- "
 653          "---------- ----------------------------\n";
 654   }
 655
 656   for (const auto &section_sp : m_sections)
 657     section_sp->Dump(s, indent, target_has_loaded_sections ? target : nullptr,
 658                      depth);
 659 }
 660
 661 size_t SectionList::Slide(addr_t slide_amount, bool slide_children) {
 662   size_t count = 0;
 663   const_iterator pos, end = m_sections.end();
 664   for (pos = m_sections.begin(); pos != end; ++pos) {
 665     if ((*pos)->Slide(slide_amount, slide_children))
 666       ++count;
 667   }
 668   return count;
 669 }
 670
 671 uint64_t SectionList::GetDebugInfoSize() const {
 672   uint64_t debug_info_size = 0;
 673   for (const auto &section : m_sections) {
 674     const SectionList &sub_sections = section->GetChildren();
 675     if (sub_sections.GetSize() > 0)
 676       debug_info_size += sub_sections.GetDebugInfoSize();
 677     else if (section->ContainsOnlyDebugInfo())
 678       debug_info_size += section->GetFileSize();
 679   }
 680   return debug_info_size;
 681 }
 682
 683 namespace llvm {
 684 namespace json {
 685
 686 bool fromJSON(const llvm::json::Value &value,
 687               lldb_private::JSONSection &section, llvm::json::Path path) {
 688   llvm::json::ObjectMapper o(value, path);
 689   return o && o.map("name", section.name) && o.map("type", section.type) &&
 690          o.map("size", section.address) && o.map("size", section.size);
 691 }
 692
 693 bool fromJSON(const llvm::json::Value &value, lldb::SectionType &type,
 694               llvm::json::Path path) {
 695   if (auto str = value.getAsString()) {
 696     type = llvm::StringSwitch<lldb::SectionType>(*str)
 697                .Case("code", eSectionTypeCode)
 698                .Case("container", eSectionTypeContainer)
 699                .Case("data", eSectionTypeData)
 700                .Case("debug", eSectionTypeDebug)
 701                .Default(eSectionTypeInvalid);
 702
 703     if (type == eSectionTypeInvalid) {
 704       path.report("invalid section type");
 705       return false;
 706     }
 707
 708     return true;
 709   }
 710   path.report("expected string");
 711   return false;
 712 }
 713 } // namespace json
 714 } // namespace llvm