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 eSectionTypeOther:
151 return "regular";
152 case eSectionTypeSwiftModules:
153 return "swift-modules";
154 }
155 return "unknown";
156 }
157
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)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
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)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
GetFileAddress() const193 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
SetFileAddress(lldb::addr_t file_addr)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
GetOffset() const218 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
GetLoadBaseAddress(Target * target) const228 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
ResolveContainedAddress(addr_t offset,Address & so_addr,bool allow_section_end) const243 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
ContainsFileAddress(addr_t vm_addr) const264 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
Dump(llvm::raw_ostream & s,unsigned indent,Target * target,uint32_t depth) const275 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
DumpName(llvm::raw_ostream & s) const311 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
IsDescendant(const Section * section)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
Slide(addr_t slide_amount,bool slide_children)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
GetPermissions() const358 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
SetPermissions(uint32_t 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
GetSectionData(void * dst,lldb::offset_t dst_len,lldb::offset_t offset)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
GetSectionData(DataExtractor & section_data)383 lldb::offset_t Section::GetSectionData(DataExtractor §ion_data) {
384 if (m_obj_file)
385 return m_obj_file->ReadSectionData(this, section_data);
386 return 0;
387 }
388
ContainsOnlyDebugInfo() const389 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
operator =(const SectionList & rhs)469 SectionList &SectionList::operator=(const SectionList &rhs) {
470 if (this != &rhs)
471 m_sections = rhs.m_sections;
472 return *this;
473 }
474
AddSection(const lldb::SectionSP & section_sp)475 size_t SectionList::AddSection(const lldb::SectionSP §ion_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.
DeleteSection(size_t idx)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
FindSectionIndex(const Section * sect)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
AddUniqueSection(const lldb::SectionSP & sect_sp)507 size_t SectionList::AddUniqueSection(const lldb::SectionSP §_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
ReplaceSection(user_id_t sect_id,const lldb::SectionSP & sect_sp,uint32_t depth)515 bool SectionList::ReplaceSection(user_id_t sect_id,
516 const lldb::SectionSP §_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
GetNumSections(uint32_t depth) const533 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
GetSectionAtIndex(size_t idx) const544 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
FindSectionByName(ConstString section_dstr) const552 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
FindSectionByID(user_id_t sect_id) const574 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
FindSectionByType(SectionType sect_type,bool check_children,size_t start_idx) const592 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
FindSectionContainingFileAddress(addr_t vm_addr,uint32_t depth) const611 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
ContainsSection(user_id_t sect_id) const634 bool SectionList::ContainsSection(user_id_t sect_id) const {
635 return FindSectionByID(sect_id).get() != nullptr;
636 }
637
Dump(llvm::raw_ostream & s,unsigned indent,Target * target,bool show_header,uint32_t depth) const638 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 §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("size", section.address) && o.map("size", section.size);
691 }
692
fromJSON(const llvm::json::Value & value,lldb::SectionType & type,llvm::json::Path path)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
715