xref: /freebsd-src/contrib/llvm-project/lldb/source/Core/Section.cpp (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583) 
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%16.16" PRIx64 " %-22s ", 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      Section Name\n",
647         target_has_loaded_sections ? "Load" : "File");
648     s.indent(indent);
649     s << "------------------ ---------------------- "
650          "---------------------------------------  ---- ---------- ---------- "
651          "---------- ----------------------------\n";
652   }
653 
654   for (const auto &section_sp : m_sections)
655     section_sp->Dump(s, indent, target_has_loaded_sections ? target : nullptr,
656                      depth);
657 }
658 
659 size_t SectionList::Slide(addr_t slide_amount, bool slide_children) {
660   size_t count = 0;
661   const_iterator pos, end = m_sections.end();
662   for (pos = m_sections.begin(); pos != end; ++pos) {
663     if ((*pos)->Slide(slide_amount, slide_children))
664       ++count;
665   }
666   return count;
667 }
668 
669 uint64_t SectionList::GetDebugInfoSize() const {
670   uint64_t debug_info_size = 0;
671   for (const auto &section : m_sections) {
672     const SectionList &sub_sections = section->GetChildren();
673     if (sub_sections.GetSize() > 0)
674       debug_info_size += sub_sections.GetDebugInfoSize();
675     else if (section->ContainsOnlyDebugInfo())
676       debug_info_size += section->GetFileSize();
677   }
678   return debug_info_size;
679 }
680 
681 namespace llvm {
682 namespace json {
683 
684 bool fromJSON(const llvm::json::Value &value,
685               lldb_private::JSONSection &section, llvm::json::Path path) {
686   llvm::json::ObjectMapper o(value, path);
687   return o && o.map("name", section.name) && o.map("type", section.type) &&
688          o.map("size", section.address) && o.map("size", section.size);
689 }
690 
691 bool fromJSON(const llvm::json::Value &value, lldb::SectionType &type,
692               llvm::json::Path path) {
693   if (auto str = value.getAsString()) {
694     type = llvm::StringSwitch<lldb::SectionType>(*str)
695                .Case("code", eSectionTypeCode)
696                .Case("container", eSectionTypeContainer)
697                .Case("data", eSectionTypeData)
698                .Case("debug", eSectionTypeDebug)
699                .Default(eSectionTypeInvalid);
700 
701     if (type == eSectionTypeInvalid) {
702       path.report("invalid section type");
703       return false;
704     }
705 
706     return true;
707   }
708   path.report("expected string");
709   return false;
710 }
711 } // namespace json
712 } // namespace llvm
713