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
GetTypeAsCString() const28 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 eSectionTypeLLDBTypeSummaries:
151 return "lldb-type-summaries";
152 case eSectionTypeLLDBFormatters:
153 return "lldb-formatters";
154 case eSectionTypeSwiftModules:
155 return "swift-modules";
156 case eSectionTypeOther:
157 return "regular";
158 }
159 return "unknown";
160 }
161
Section(const ModuleSP & module_sp,ObjectFile * obj_file,user_id_t sect_id,ConstString name,SectionType sect_type,addr_t file_addr,addr_t byte_size,lldb::offset_t file_offset,lldb::offset_t file_size,uint32_t log2align,uint32_t flags,uint32_t target_byte_size)162 Section::Section(const ModuleSP &module_sp, ObjectFile *obj_file,
163 user_id_t sect_id, ConstString name, SectionType sect_type,
164 addr_t file_addr, addr_t byte_size, lldb::offset_t file_offset,
165 lldb::offset_t file_size, uint32_t log2align, uint32_t flags,
166 uint32_t target_byte_size /*=1*/)
167 : ModuleChild(module_sp), UserID(sect_id), Flags(flags),
168 m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
169 m_file_addr(file_addr), m_byte_size(byte_size),
170 m_file_offset(file_offset), m_file_size(file_size),
171 m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
172 m_thread_specific(false), m_readable(false), m_writable(false),
173 m_executable(false), m_relocated(false),
174 m_target_byte_size(target_byte_size) {}
175
Section(const lldb::SectionSP & parent_section_sp,const ModuleSP & module_sp,ObjectFile * obj_file,user_id_t sect_id,ConstString name,SectionType sect_type,addr_t file_addr,addr_t byte_size,lldb::offset_t file_offset,lldb::offset_t file_size,uint32_t log2align,uint32_t flags,uint32_t target_byte_size)176 Section::Section(const lldb::SectionSP &parent_section_sp,
177 const ModuleSP &module_sp, ObjectFile *obj_file,
178 user_id_t sect_id, ConstString name, SectionType sect_type,
179 addr_t file_addr, addr_t byte_size, lldb::offset_t file_offset,
180 lldb::offset_t file_size, uint32_t log2align, uint32_t flags,
181 uint32_t target_byte_size /*=1*/)
182 : ModuleChild(module_sp), UserID(sect_id), Flags(flags),
183 m_obj_file(obj_file), m_type(sect_type), m_parent_wp(), m_name(name),
184 m_file_addr(file_addr), m_byte_size(byte_size),
185 m_file_offset(file_offset), m_file_size(file_size),
186 m_log2align(log2align), m_children(), m_fake(false), m_encrypted(false),
187 m_thread_specific(false), m_readable(false), m_writable(false),
188 m_executable(false), m_relocated(false),
189 m_target_byte_size(target_byte_size) {
190 if (parent_section_sp)
191 m_parent_wp = parent_section_sp;
192 }
193
194 Section::~Section() = default;
195
GetFileAddress() const196 addr_t Section::GetFileAddress() const {
197 SectionSP parent_sp(GetParent());
198 if (parent_sp) {
199 // This section has a parent which means m_file_addr is an offset into the
200 // parent section, so the file address for this section is the file address
201 // of the parent plus the offset
202 return parent_sp->GetFileAddress() + m_file_addr;
203 }
204 // This section has no parent, so m_file_addr is the file base address
205 return m_file_addr;
206 }
207
SetFileAddress(lldb::addr_t file_addr)208 bool Section::SetFileAddress(lldb::addr_t file_addr) {
209 SectionSP parent_sp(GetParent());
210 if (parent_sp) {
211 if (m_file_addr >= file_addr)
212 return parent_sp->SetFileAddress(m_file_addr - file_addr);
213 return false;
214 } else {
215 // This section has no parent, so m_file_addr is the file base address
216 m_file_addr = file_addr;
217 return true;
218 }
219 }
220
GetOffset() const221 lldb::addr_t Section::GetOffset() const {
222 // This section has a parent which means m_file_addr is an offset.
223 SectionSP parent_sp(GetParent());
224 if (parent_sp)
225 return m_file_addr;
226
227 // This section has no parent, so there is no offset to be had
228 return 0;
229 }
230
GetLoadBaseAddress(Target * target) const231 addr_t Section::GetLoadBaseAddress(Target *target) const {
232 addr_t load_base_addr = LLDB_INVALID_ADDRESS;
233 SectionSP parent_sp(GetParent());
234 if (parent_sp) {
235 load_base_addr = parent_sp->GetLoadBaseAddress(target);
236 if (load_base_addr != LLDB_INVALID_ADDRESS)
237 load_base_addr += GetOffset();
238 }
239 if (load_base_addr == LLDB_INVALID_ADDRESS) {
240 load_base_addr = target->GetSectionLoadAddress(
241 const_cast<Section *>(this)->shared_from_this());
242 }
243 return load_base_addr;
244 }
245
ResolveContainedAddress(addr_t offset,Address & so_addr,bool allow_section_end) const246 bool Section::ResolveContainedAddress(addr_t offset, Address &so_addr,
247 bool allow_section_end) const {
248 const size_t num_children = m_children.GetSize();
249 for (size_t i = 0; i < num_children; i++) {
250 Section *child_section = m_children.GetSectionAtIndex(i).get();
251
252 addr_t child_offset = child_section->GetOffset();
253 if (child_offset <= offset &&
254 offset - child_offset <
255 child_section->GetByteSize() + (allow_section_end ? 1 : 0))
256 return child_section->ResolveContainedAddress(offset - child_offset,
257 so_addr, allow_section_end);
258 }
259 so_addr.SetOffset(offset);
260 so_addr.SetSection(const_cast<Section *>(this)->shared_from_this());
261
262 // Ensure that there are no orphaned (i.e., moduleless) sections.
263 assert(GetModule().get());
264 return true;
265 }
266
ContainsFileAddress(addr_t vm_addr) const267 bool Section::ContainsFileAddress(addr_t vm_addr) const {
268 const addr_t file_addr = GetFileAddress();
269 if (file_addr != LLDB_INVALID_ADDRESS && !IsThreadSpecific()) {
270 if (file_addr <= vm_addr) {
271 const addr_t offset = (vm_addr - file_addr) * m_target_byte_size;
272 return offset < GetByteSize();
273 }
274 }
275 return false;
276 }
277
Dump(llvm::raw_ostream & s,unsigned indent,Target * target,uint32_t depth) const278 void Section::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
279 uint32_t depth) const {
280 s.indent(indent);
281 s << llvm::format("0x%16.16" PRIx64 " %-22s ", GetID(), GetTypeAsCString());
282 bool resolved = true;
283 addr_t addr = LLDB_INVALID_ADDRESS;
284
285 if (GetByteSize() == 0)
286 s.indent(39);
287 else {
288 if (target)
289 addr = GetLoadBaseAddress(target);
290
291 if (addr == LLDB_INVALID_ADDRESS) {
292 if (target)
293 resolved = false;
294 addr = GetFileAddress();
295 }
296
297 VMRange range(addr, addr + m_byte_size);
298 range.Dump(s, 0);
299 }
300
301 s << llvm::format("%c %c%c%c 0x%8.8" PRIx64 " 0x%8.8" PRIx64 " 0x%8.8x ",
302 resolved ? ' ' : '*', m_readable ? 'r' : '-',
303 m_writable ? 'w' : '-', m_executable ? 'x' : '-',
304 m_file_offset, m_file_size, Get());
305
306 DumpName(s);
307
308 s << "\n";
309
310 if (depth > 0)
311 m_children.Dump(s, indent, target, false, depth - 1);
312 }
313
DumpName(llvm::raw_ostream & s) const314 void Section::DumpName(llvm::raw_ostream &s) const {
315 SectionSP parent_sp(GetParent());
316 if (parent_sp) {
317 parent_sp->DumpName(s);
318 s << '.';
319 } else {
320 // The top most section prints the module basename
321 const char *name = nullptr;
322 ModuleSP module_sp(GetModule());
323
324 if (m_obj_file) {
325 const FileSpec &file_spec = m_obj_file->GetFileSpec();
326 name = file_spec.GetFilename().AsCString();
327 }
328 if ((!name || !name[0]) && module_sp)
329 name = module_sp->GetFileSpec().GetFilename().AsCString();
330 if (name && name[0])
331 s << name << '.';
332 }
333 s << m_name;
334 }
335
IsDescendant(const Section * section)336 bool Section::IsDescendant(const Section *section) {
337 if (this == section)
338 return true;
339 SectionSP parent_sp(GetParent());
340 if (parent_sp)
341 return parent_sp->IsDescendant(section);
342 return false;
343 }
344
Slide(addr_t slide_amount,bool slide_children)345 bool Section::Slide(addr_t slide_amount, bool slide_children) {
346 if (m_file_addr != LLDB_INVALID_ADDRESS) {
347 if (slide_amount == 0)
348 return true;
349
350 m_file_addr += slide_amount;
351
352 if (slide_children)
353 m_children.Slide(slide_amount, slide_children);
354
355 return true;
356 }
357 return false;
358 }
359
360 /// Get the permissions as OR'ed bits from lldb::Permissions
GetPermissions() const361 uint32_t Section::GetPermissions() const {
362 uint32_t permissions = 0;
363 if (m_readable)
364 permissions |= ePermissionsReadable;
365 if (m_writable)
366 permissions |= ePermissionsWritable;
367 if (m_executable)
368 permissions |= ePermissionsExecutable;
369 return permissions;
370 }
371
372 /// Set the permissions using bits OR'ed from lldb::Permissions
SetPermissions(uint32_t permissions)373 void Section::SetPermissions(uint32_t permissions) {
374 m_readable = (permissions & ePermissionsReadable) != 0;
375 m_writable = (permissions & ePermissionsWritable) != 0;
376 m_executable = (permissions & ePermissionsExecutable) != 0;
377 }
378
GetSectionData(void * dst,lldb::offset_t dst_len,lldb::offset_t offset)379 lldb::offset_t Section::GetSectionData(void *dst, lldb::offset_t dst_len,
380 lldb::offset_t offset) {
381 if (m_obj_file)
382 return m_obj_file->ReadSectionData(this, offset, dst, dst_len);
383 return 0;
384 }
385
GetSectionData(DataExtractor & section_data)386 lldb::offset_t Section::GetSectionData(DataExtractor §ion_data) {
387 if (m_obj_file)
388 return m_obj_file->ReadSectionData(this, section_data);
389 return 0;
390 }
391
ContainsOnlyDebugInfo() const392 bool Section::ContainsOnlyDebugInfo() const {
393 switch (m_type) {
394 case eSectionTypeInvalid:
395 case eSectionTypeCode:
396 case eSectionTypeContainer:
397 case eSectionTypeData:
398 case eSectionTypeDataCString:
399 case eSectionTypeDataCStringPointers:
400 case eSectionTypeDataSymbolAddress:
401 case eSectionTypeData4:
402 case eSectionTypeData8:
403 case eSectionTypeData16:
404 case eSectionTypeDataPointers:
405 case eSectionTypeZeroFill:
406 case eSectionTypeDataObjCMessageRefs:
407 case eSectionTypeDataObjCCFStrings:
408 case eSectionTypeELFSymbolTable:
409 case eSectionTypeELFDynamicSymbols:
410 case eSectionTypeELFRelocationEntries:
411 case eSectionTypeELFDynamicLinkInfo:
412 case eSectionTypeEHFrame:
413 case eSectionTypeARMexidx:
414 case eSectionTypeARMextab:
415 case eSectionTypeCompactUnwind:
416 case eSectionTypeGoSymtab:
417 case eSectionTypeAbsoluteAddress:
418 case eSectionTypeOther:
419 // Used for "__dof_cache" in mach-o or ".debug" for COFF which isn't debug
420 // information that we parse at all. This was causing system files with no
421 // debug info to show debug info byte sizes in the "statistics dump" output
422 // for each module. New "eSectionType" enums should be created for dedicated
423 // debug info that has a predefined format if we wish for these sections to
424 // show up as debug info.
425 case eSectionTypeDebug:
426 return false;
427
428 case eSectionTypeDWARFDebugAbbrev:
429 case eSectionTypeDWARFDebugAbbrevDwo:
430 case eSectionTypeDWARFDebugAddr:
431 case eSectionTypeDWARFDebugAranges:
432 case eSectionTypeDWARFDebugCuIndex:
433 case eSectionTypeDWARFDebugTuIndex:
434 case eSectionTypeDWARFDebugFrame:
435 case eSectionTypeDWARFDebugInfo:
436 case eSectionTypeDWARFDebugInfoDwo:
437 case eSectionTypeDWARFDebugLine:
438 case eSectionTypeDWARFDebugLineStr:
439 case eSectionTypeDWARFDebugLoc:
440 case eSectionTypeDWARFDebugLocDwo:
441 case eSectionTypeDWARFDebugLocLists:
442 case eSectionTypeDWARFDebugLocListsDwo:
443 case eSectionTypeDWARFDebugMacInfo:
444 case eSectionTypeDWARFDebugMacro:
445 case eSectionTypeDWARFDebugPubNames:
446 case eSectionTypeDWARFDebugPubTypes:
447 case eSectionTypeDWARFDebugRanges:
448 case eSectionTypeDWARFDebugRngLists:
449 case eSectionTypeDWARFDebugRngListsDwo:
450 case eSectionTypeDWARFDebugStr:
451 case eSectionTypeDWARFDebugStrDwo:
452 case eSectionTypeDWARFDebugStrOffsets:
453 case eSectionTypeDWARFDebugStrOffsetsDwo:
454 case eSectionTypeDWARFDebugTypes:
455 case eSectionTypeDWARFDebugTypesDwo:
456 case eSectionTypeDWARFDebugNames:
457 case eSectionTypeDWARFAppleNames:
458 case eSectionTypeDWARFAppleTypes:
459 case eSectionTypeDWARFAppleNamespaces:
460 case eSectionTypeDWARFAppleObjC:
461 case eSectionTypeDWARFGNUDebugAltLink:
462 case eSectionTypeCTF:
463 case eSectionTypeLLDBTypeSummaries:
464 case eSectionTypeLLDBFormatters:
465 case eSectionTypeSwiftModules:
466 return true;
467 }
468 return false;
469 }
470
471 #pragma mark SectionList
472
operator =(const SectionList & rhs)473 SectionList &SectionList::operator=(const SectionList &rhs) {
474 if (this != &rhs)
475 m_sections = rhs.m_sections;
476 return *this;
477 }
478
AddSection(const lldb::SectionSP & section_sp)479 size_t SectionList::AddSection(const lldb::SectionSP §ion_sp) {
480 if (section_sp) {
481 size_t section_index = m_sections.size();
482 m_sections.push_back(section_sp);
483 return section_index;
484 }
485
486 return std::numeric_limits<size_t>::max();
487 }
488
489 // Warning, this can be slow as it's removing items from a std::vector.
DeleteSection(size_t idx)490 bool SectionList::DeleteSection(size_t idx) {
491 if (idx < m_sections.size()) {
492 m_sections.erase(m_sections.begin() + idx);
493 return true;
494 }
495 return false;
496 }
497
FindSectionIndex(const Section * sect)498 size_t SectionList::FindSectionIndex(const Section *sect) {
499 iterator sect_iter;
500 iterator begin = m_sections.begin();
501 iterator end = m_sections.end();
502 for (sect_iter = begin; sect_iter != end; ++sect_iter) {
503 if (sect_iter->get() == sect) {
504 // The secton was already in this section list
505 return std::distance(begin, sect_iter);
506 }
507 }
508 return UINT32_MAX;
509 }
510
AddUniqueSection(const lldb::SectionSP & sect_sp)511 size_t SectionList::AddUniqueSection(const lldb::SectionSP §_sp) {
512 size_t sect_idx = FindSectionIndex(sect_sp.get());
513 if (sect_idx == UINT32_MAX) {
514 sect_idx = AddSection(sect_sp);
515 }
516 return sect_idx;
517 }
518
ReplaceSection(user_id_t sect_id,const lldb::SectionSP & sect_sp,uint32_t depth)519 bool SectionList::ReplaceSection(user_id_t sect_id,
520 const lldb::SectionSP §_sp,
521 uint32_t depth) {
522 iterator sect_iter, end = m_sections.end();
523 for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
524 if ((*sect_iter)->GetID() == sect_id) {
525 *sect_iter = sect_sp;
526 return true;
527 } else if (depth > 0) {
528 if ((*sect_iter)
529 ->GetChildren()
530 .ReplaceSection(sect_id, sect_sp, depth - 1))
531 return true;
532 }
533 }
534 return false;
535 }
536
GetNumSections(uint32_t depth) const537 size_t SectionList::GetNumSections(uint32_t depth) const {
538 size_t count = m_sections.size();
539 if (depth > 0) {
540 const_iterator sect_iter, end = m_sections.end();
541 for (sect_iter = m_sections.begin(); sect_iter != end; ++sect_iter) {
542 count += (*sect_iter)->GetChildren().GetNumSections(depth - 1);
543 }
544 }
545 return count;
546 }
547
GetSectionAtIndex(size_t idx) const548 SectionSP SectionList::GetSectionAtIndex(size_t idx) const {
549 SectionSP sect_sp;
550 if (idx < m_sections.size())
551 sect_sp = m_sections[idx];
552 return sect_sp;
553 }
554
FindSectionByName(ConstString section_dstr) const555 SectionSP SectionList::FindSectionByName(ConstString section_dstr) const {
556 SectionSP sect_sp;
557 // Check if we have a valid section string
558 if (section_dstr && !m_sections.empty()) {
559 const_iterator sect_iter;
560 const_iterator end = m_sections.end();
561 for (sect_iter = m_sections.begin();
562 sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
563 Section *child_section = sect_iter->get();
564 if (child_section) {
565 if (child_section->GetName() == section_dstr) {
566 sect_sp = *sect_iter;
567 } else {
568 sect_sp =
569 child_section->GetChildren().FindSectionByName(section_dstr);
570 }
571 }
572 }
573 }
574 return sect_sp;
575 }
576
FindSectionByID(user_id_t sect_id) const577 SectionSP SectionList::FindSectionByID(user_id_t sect_id) const {
578 SectionSP sect_sp;
579 if (sect_id) {
580 const_iterator sect_iter;
581 const_iterator end = m_sections.end();
582 for (sect_iter = m_sections.begin();
583 sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
584 if ((*sect_iter)->GetID() == sect_id) {
585 sect_sp = *sect_iter;
586 break;
587 } else {
588 sect_sp = (*sect_iter)->GetChildren().FindSectionByID(sect_id);
589 }
590 }
591 }
592 return sect_sp;
593 }
594
FindSectionByType(SectionType sect_type,bool check_children,size_t start_idx) const595 SectionSP SectionList::FindSectionByType(SectionType sect_type,
596 bool check_children,
597 size_t start_idx) const {
598 SectionSP sect_sp;
599 size_t num_sections = m_sections.size();
600 for (size_t idx = start_idx; idx < num_sections; ++idx) {
601 if (m_sections[idx]->GetType() == sect_type) {
602 sect_sp = m_sections[idx];
603 break;
604 } else if (check_children) {
605 sect_sp = m_sections[idx]->GetChildren().FindSectionByType(
606 sect_type, check_children, 0);
607 if (sect_sp)
608 break;
609 }
610 }
611 return sect_sp;
612 }
613
FindSectionContainingFileAddress(addr_t vm_addr,uint32_t depth) const614 SectionSP SectionList::FindSectionContainingFileAddress(addr_t vm_addr,
615 uint32_t depth) const {
616 SectionSP sect_sp;
617 const_iterator sect_iter;
618 const_iterator end = m_sections.end();
619 for (sect_iter = m_sections.begin();
620 sect_iter != end && sect_sp.get() == nullptr; ++sect_iter) {
621 Section *sect = sect_iter->get();
622 if (sect->ContainsFileAddress(vm_addr)) {
623 // The file address is in this section. We need to make sure one of our
624 // child sections doesn't contain this address as well as obeying the
625 // depth limit that was passed in.
626 if (depth > 0)
627 sect_sp = sect->GetChildren().FindSectionContainingFileAddress(
628 vm_addr, depth - 1);
629
630 if (sect_sp.get() == nullptr && !sect->IsFake())
631 sect_sp = *sect_iter;
632 }
633 }
634 return sect_sp;
635 }
636
ContainsSection(user_id_t sect_id) const637 bool SectionList::ContainsSection(user_id_t sect_id) const {
638 return FindSectionByID(sect_id).get() != nullptr;
639 }
640
Dump(llvm::raw_ostream & s,unsigned indent,Target * target,bool show_header,uint32_t depth) const641 void SectionList::Dump(llvm::raw_ostream &s, unsigned indent, Target *target,
642 bool show_header, uint32_t depth) const {
643 bool target_has_loaded_sections = target && target->HasLoadedSections();
644 if (show_header && !m_sections.empty()) {
645 s.indent(indent);
646 s << llvm::formatv(
647 "SectID Type {0} Address "
648 " Perm File Off. File Size Flags Section Name\n",
649 target_has_loaded_sections ? "Load" : "File");
650 s.indent(indent);
651 s << "------------------ ---------------------- "
652 "--------------------------------------- ---- ---------- ---------- "
653 "---------- ----------------------------\n";
654 }
655
656 for (const auto §ion_sp : m_sections)
657 section_sp->Dump(s, indent, target_has_loaded_sections ? target : nullptr,
658 depth);
659 }
660
Slide(addr_t slide_amount,bool slide_children)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
GetDebugInfoSize() const671 uint64_t SectionList::GetDebugInfoSize() const {
672 uint64_t debug_info_size = 0;
673 for (const auto §ion : 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
fromJSON(const llvm::json::Value & value,lldb_private::JSONSection & section,llvm::json::Path path)686 bool fromJSON(const llvm::json::Value &value,
687 lldb_private::JSONSection §ion, 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("address", section.address) && o.map("size", section.size) &&
691 o.map("read", section.read) && o.map("write", section.write) &&
692 o.map("execute", section.execute) &&
693 o.mapOptional("subsections", section.subsections) &&
694 o.map("user_id", section.user_id) &&
695 o.map("file_offset", section.file_offset) &&
696 o.map("file_size", section.file_size) &&
697 o.map("alignment", section.log2align) &&
698 o.map("flags", section.flags) && o.map("fake", section.fake) &&
699 o.map("encrypted", section.encrypted) &&
700 o.map("thread_specific", section.thread_specific);
701 }
702
fromJSON(const llvm::json::Value & value,lldb::SectionType & type,llvm::json::Path path)703 bool fromJSON(const llvm::json::Value &value, lldb::SectionType &type,
704 llvm::json::Path path) {
705 if (auto str = value.getAsString()) {
706 type = llvm::StringSwitch<lldb::SectionType>(*str)
707 .Case("code", eSectionTypeCode)
708 .Case("container", eSectionTypeContainer)
709 .Case("data", eSectionTypeData)
710 .Case("debug", eSectionTypeDebug)
711 .Default(eSectionTypeInvalid);
712
713 if (type == eSectionTypeInvalid) {
714 path.report("invalid section type");
715 return false;
716 }
717
718 return true;
719 }
720 path.report("expected string");
721 return false;
722 }
723 } // namespace json
724 } // namespace llvm
725