1 //===-- DWARFContext.cpp --------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "DWARFContext.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/StringSwitch.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/Support/Compression.h"
15 #include "llvm/Support/Dwarf.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/Support/Path.h"
18 #include "llvm/Support/raw_ostream.h"
21 using namespace dwarf;
22 using namespace object;
24 typedef DWARFDebugLine::LineTable DWARFLineTable;
26 DWARFContext::~DWARFContext() {
27 DeleteContainerPointers(CUs);
28 DeleteContainerPointers(DWOCUs);
31 static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
32 bool LittleEndian, bool GnuStyle) {
33 OS << "\n." << Name << " contents:\n";
34 DataExtractor pubNames(Data, LittleEndian, 0);
36 OS << "Length: " << pubNames.getU32(&offset) << "\n";
37 OS << "Version: " << pubNames.getU16(&offset) << "\n";
38 OS << "Offset in .debug_info: " << pubNames.getU32(&offset) << "\n";
39 OS << "Size: " << pubNames.getU32(&offset) << "\n";
41 OS << "Offset Linkage Kind Name\n";
43 OS << "Offset Name\n";
45 while (offset < Data.size()) {
46 uint32_t dieRef = pubNames.getU32(&offset);
50 PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
51 OS << format("0x%8.8x ", dieRef)
52 << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
53 << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
54 << ' ' << '\"' << pubNames.getCStr(&offset) << "\"\n";
56 OS << format("0x%8.8x ", dieRef);
57 OS << pubNames.getCStr(&offset) << "\n";
62 void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
63 if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
64 OS << ".debug_abbrev contents:\n";
65 getDebugAbbrev()->dump(OS);
68 if (DumpType == DIDT_All || DumpType == DIDT_Info) {
69 OS << "\n.debug_info contents:\n";
70 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i)
71 getCompileUnitAtIndex(i)->dump(OS);
74 if (DumpType == DIDT_All || DumpType == DIDT_Types) {
75 OS << "\n.debug_types contents:\n";
76 for (unsigned i = 0, e = getNumTypeUnits(); i != e; ++i)
77 getTypeUnitAtIndex(i)->dump(OS);
80 if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
81 OS << "\n.debug_loc contents:\n";
82 getDebugLoc()->dump(OS);
85 if (DumpType == DIDT_All || DumpType == DIDT_Frames) {
86 OS << "\n.debug_frame contents:\n";
87 getDebugFrame()->dump(OS);
91 if (DumpType == DIDT_All || DumpType == DIDT_Aranges) {
92 OS << "\n.debug_aranges contents:\n";
93 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
94 DWARFDebugArangeSet set;
95 while (set.extract(arangesData, &offset))
99 uint8_t savedAddressByteSize = 0;
100 if (DumpType == DIDT_All || DumpType == DIDT_Line) {
101 OS << "\n.debug_line contents:\n";
102 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i) {
103 DWARFCompileUnit *cu = getCompileUnitAtIndex(i);
104 savedAddressByteSize = cu->getAddressByteSize();
105 unsigned stmtOffset =
106 cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
108 if (stmtOffset != -1U) {
109 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
110 savedAddressByteSize);
111 DWARFDebugLine::DumpingState state(OS);
112 DWARFDebugLine::parseStatementTable(lineData, &getLineSection().Relocs, &stmtOffset, state);
117 if (DumpType == DIDT_All || DumpType == DIDT_Str) {
118 OS << "\n.debug_str contents:\n";
119 DataExtractor strData(getStringSection(), isLittleEndian(), 0);
121 uint32_t strOffset = 0;
122 while (const char *s = strData.getCStr(&offset)) {
123 OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
128 if (DumpType == DIDT_All || DumpType == DIDT_Ranges) {
129 OS << "\n.debug_ranges contents:\n";
130 // In fact, different compile units may have different address byte
131 // sizes, but for simplicity we just use the address byte size of the last
132 // compile unit (there is no easy and fast way to associate address range
133 // list and the compile unit it describes).
134 DataExtractor rangesData(getRangeSection(), isLittleEndian(),
135 savedAddressByteSize);
137 DWARFDebugRangeList rangeList;
138 while (rangeList.extract(rangesData, &offset))
142 if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
143 dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
144 isLittleEndian(), false);
146 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
147 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
148 isLittleEndian(), true /* GnuStyle */);
150 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
151 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
152 isLittleEndian(), true /* GnuStyle */);
154 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo) {
155 const DWARFDebugAbbrev *D = getDebugAbbrevDWO();
157 OS << "\n.debug_abbrev.dwo contents:\n";
158 getDebugAbbrevDWO()->dump(OS);
162 if (DumpType == DIDT_All || DumpType == DIDT_InfoDwo)
163 if (getNumDWOCompileUnits()) {
164 OS << "\n.debug_info.dwo contents:\n";
165 for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
166 getDWOCompileUnitAtIndex(i)->dump(OS);
169 if (DumpType == DIDT_All || DumpType == DIDT_StrDwo)
170 if (!getStringDWOSection().empty()) {
171 OS << "\n.debug_str.dwo contents:\n";
172 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
174 uint32_t strDWOOffset = 0;
175 while (const char *s = strDWOData.getCStr(&offset)) {
176 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
177 strDWOOffset = offset;
181 if (DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo)
182 if (!getStringOffsetDWOSection().empty()) {
183 OS << "\n.debug_str_offsets.dwo contents:\n";
184 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(), 0);
186 uint64_t size = getStringOffsetDWOSection().size();
187 while (offset < size) {
188 OS << format("0x%8.8x: ", offset);
189 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
194 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
198 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
200 Abbrev.reset(new DWARFDebugAbbrev());
201 Abbrev->parse(abbrData);
205 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
207 return AbbrevDWO.get();
209 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
210 AbbrevDWO.reset(new DWARFDebugAbbrev());
211 AbbrevDWO->parse(abbrData);
212 return AbbrevDWO.get();
215 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
219 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
220 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
221 // assume all compile units have the same address byte size
222 if (getNumCompileUnits())
223 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
227 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
229 return Aranges.get();
231 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
233 Aranges.reset(new DWARFDebugAranges());
234 Aranges->extract(arangesData);
235 // Generate aranges from DIEs: even if .debug_aranges section is present,
236 // it may describe only a small subset of compilation units, so we need to
237 // manually build aranges for the rest of them.
238 Aranges->generate(this);
239 return Aranges.get();
242 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
244 return DebugFrame.get();
246 // There's a "bug" in the DWARFv3 standard with respect to the target address
247 // size within debug frame sections. While DWARF is supposed to be independent
248 // of its container, FDEs have fields with size being "target address size",
249 // which isn't specified in DWARF in general. It's only specified for CUs, but
250 // .eh_frame can appear without a .debug_info section. Follow the example of
251 // other tools (libdwarf) and extract this from the container (ObjectFile
252 // provides this information). This problem is fixed in DWARFv4
253 // See this dwarf-discuss discussion for more details:
254 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
255 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
257 DebugFrame.reset(new DWARFDebugFrame());
258 DebugFrame->parse(debugFrameData);
259 return DebugFrame.get();
262 const DWARFLineTable *
263 DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
265 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
267 unsigned stmtOffset =
268 cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
270 if (stmtOffset == -1U)
271 return 0; // No line table for this compile unit.
273 // See if the line table is cached.
274 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
277 // We have to parse it first.
278 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
279 cu->getAddressByteSize());
280 return Line->getOrParseLineTable(lineData, stmtOffset);
283 void DWARFContext::parseCompileUnits() {
285 const DataExtractor &DIData = DataExtractor(getInfoSection().Data,
286 isLittleEndian(), 0);
287 while (DIData.isValidOffset(offset)) {
288 OwningPtr<DWARFCompileUnit> CU(new DWARFCompileUnit(
289 getDebugAbbrev(), getInfoSection().Data, getAbbrevSection(),
290 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
291 &getInfoSection().Relocs, isLittleEndian()));
292 if (!CU->extract(DIData, &offset)) {
295 CUs.push_back(CU.take());
296 offset = CUs.back()->getNextUnitOffset();
300 void DWARFContext::parseTypeUnits() {
301 const std::map<object::SectionRef, Section> &Sections = getTypesSections();
302 for (std::map<object::SectionRef, Section>::const_iterator
303 I = Sections.begin(),
307 const DataExtractor &DIData =
308 DataExtractor(I->second.Data, isLittleEndian(), 0);
309 while (DIData.isValidOffset(offset)) {
310 OwningPtr<DWARFTypeUnit> TU(new DWARFTypeUnit(
311 getDebugAbbrev(), I->second.Data, getAbbrevSection(),
312 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
313 &I->second.Relocs, isLittleEndian()));
314 if (!TU->extract(DIData, &offset))
316 TUs.push_back(TU.take());
317 offset = TUs.back()->getNextUnitOffset();
322 void DWARFContext::parseDWOCompileUnits() {
324 const DataExtractor &DIData =
325 DataExtractor(getInfoDWOSection().Data, isLittleEndian(), 0);
326 while (DIData.isValidOffset(offset)) {
327 OwningPtr<DWARFCompileUnit> DWOCU(new DWARFCompileUnit(
328 getDebugAbbrevDWO(), getInfoDWOSection().Data, getAbbrevDWOSection(),
329 getRangeDWOSection(), getStringDWOSection(),
330 getStringOffsetDWOSection(), getAddrSection(),
331 &getInfoDWOSection().Relocs, isLittleEndian()));
332 if (!DWOCU->extract(DIData, &offset)) {
335 DWOCUs.push_back(DWOCU.take());
336 offset = DWOCUs.back()->getNextUnitOffset();
341 struct OffsetComparator {
342 bool operator()(const DWARFCompileUnit *LHS,
343 const DWARFCompileUnit *RHS) const {
344 return LHS->getOffset() < RHS->getOffset();
346 bool operator()(const DWARFCompileUnit *LHS, uint32_t RHS) const {
347 return LHS->getOffset() < RHS;
349 bool operator()(uint32_t LHS, const DWARFCompileUnit *RHS) const {
350 return LHS < RHS->getOffset();
355 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
359 DWARFCompileUnit **CU =
360 std::lower_bound(CUs.begin(), CUs.end(), Offset, OffsetComparator());
361 if (CU != CUs.end()) {
367 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
368 // First, get the offset of the compile unit.
369 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
370 // Retrieve the compile unit.
371 return getCompileUnitForOffset(CUOffset);
374 static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
375 const DWARFLineTable *LineTable,
377 bool NeedsAbsoluteFilePath,
378 std::string &FileName) {
381 !LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
384 if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
385 // We may still need to append compilation directory of compile unit.
386 SmallString<16> AbsolutePath;
387 if (const char *CompilationDir = CU->getCompilationDir()) {
388 sys::path::append(AbsolutePath, CompilationDir);
390 sys::path::append(AbsolutePath, FileName);
391 FileName = AbsolutePath.str();
396 static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
397 const DWARFLineTable *LineTable,
399 bool NeedsAbsoluteFilePath,
400 std::string &FileName,
401 uint32_t &Line, uint32_t &Column) {
402 if (CU == 0 || LineTable == 0)
404 // Get the index of row we're looking for in the line table.
405 uint32_t RowIndex = LineTable->lookupAddress(Address);
408 // Take file number and line/column from the row.
409 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
410 if (!getFileNameForCompileUnit(CU, LineTable, Row.File,
411 NeedsAbsoluteFilePath, FileName))
418 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
419 DILineInfoSpecifier Specifier) {
420 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
423 std::string FileName = "<invalid>";
424 std::string FunctionName = "<invalid>";
427 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
428 // The address may correspond to instruction in some inlined function,
429 // so we have to build the chain of inlined functions and take the
430 // name of the topmost function in it.
431 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
432 CU->getInlinedChainForAddress(Address);
433 if (InlinedChain.DIEs.size() > 0) {
434 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
435 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
439 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
440 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
441 const bool NeedsAbsoluteFilePath =
442 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
443 getFileLineInfoForCompileUnit(CU, LineTable, Address,
444 NeedsAbsoluteFilePath,
445 FileName, Line, Column);
447 return DILineInfo(StringRef(FileName), StringRef(FunctionName),
451 DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
453 DILineInfoSpecifier Specifier) {
454 DILineInfoTable Lines;
455 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
459 std::string FunctionName = "<invalid>";
460 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
461 // The address may correspond to instruction in some inlined function,
462 // so we have to build the chain of inlined functions and take the
463 // name of the topmost function in it.
464 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
465 CU->getInlinedChainForAddress(Address);
466 if (InlinedChain.DIEs.size() > 0) {
467 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
468 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
473 // If the Specifier says we don't need FileLineInfo, just
474 // return the top-most function at the starting address.
475 if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
477 std::make_pair(Address, DILineInfo("<invalid>", FunctionName, 0, 0)));
481 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
482 const bool NeedsAbsoluteFilePath =
483 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
485 // Get the index of row we're looking for in the line table.
486 std::vector<uint32_t> RowVector;
487 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
490 uint32_t NumRows = RowVector.size();
491 for (uint32_t i = 0; i < NumRows; ++i) {
492 uint32_t RowIndex = RowVector[i];
493 // Take file number and line/column from the row.
494 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
495 std::string FileName = "<invalid>";
496 getFileNameForCompileUnit(CU, LineTable, Row.File,
497 NeedsAbsoluteFilePath, FileName);
498 Lines.push_back(std::make_pair(
499 Row.Address, DILineInfo(FileName, FunctionName, Row.Line, Row.Column)));
505 DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
506 DILineInfoSpecifier Specifier) {
507 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
509 return DIInliningInfo();
511 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
512 CU->getInlinedChainForAddress(Address);
513 if (InlinedChain.DIEs.size() == 0)
514 return DIInliningInfo();
516 DIInliningInfo InliningInfo;
517 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
518 const DWARFLineTable *LineTable = 0;
519 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
520 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
521 std::string FileName = "<invalid>";
522 std::string FunctionName = "<invalid>";
525 // Get function name if necessary.
526 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
527 if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
530 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
531 const bool NeedsAbsoluteFilePath =
532 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
534 // For the topmost frame, initialize the line table of this
535 // compile unit and fetch file/line info from it.
536 LineTable = getLineTableForCompileUnit(CU);
537 // For the topmost routine, get file/line info from line table.
538 getFileLineInfoForCompileUnit(CU, LineTable, Address,
539 NeedsAbsoluteFilePath,
540 FileName, Line, Column);
542 // Otherwise, use call file, call line and call column from
543 // previous DIE in inlined chain.
544 getFileNameForCompileUnit(CU, LineTable, CallFile,
545 NeedsAbsoluteFilePath, FileName);
549 // Get call file/line/column of a current DIE.
551 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
555 DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
557 InliningInfo.addFrame(Frame);
562 static bool consumeCompressedDebugSectionHeader(StringRef &data,
563 uint64_t &OriginalSize) {
564 // Consume "ZLIB" prefix.
565 if (!data.startswith("ZLIB"))
567 data = data.substr(4);
568 // Consume uncompressed section size (big-endian 8 bytes).
569 DataExtractor extractor(data, false, 8);
571 OriginalSize = extractor.getU64(&Offset);
574 data = data.substr(Offset);
578 DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
579 IsLittleEndian(Obj->isLittleEndian()),
580 AddressSize(Obj->getBytesInAddress()) {
582 for (object::section_iterator i = Obj->begin_sections(),
583 e = Obj->end_sections();
584 i != e; i.increment(ec)) {
588 i->getContents(data);
590 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
592 // Check if debug info section is compressed with zlib.
593 if (name.startswith("zdebug_")) {
594 uint64_t OriginalSize;
595 if (!zlib::isAvailable() ||
596 !consumeCompressedDebugSectionHeader(data, OriginalSize))
598 OwningPtr<MemoryBuffer> UncompressedSection;
599 if (zlib::uncompress(data, UncompressedSection, OriginalSize) !=
602 // Make data point to uncompressed section contents and save its contents.
603 name = name.substr(1);
604 data = UncompressedSection->getBuffer();
605 UncompressedSections.push_back(UncompressedSection.take());
608 StringRef *Section = StringSwitch<StringRef*>(name)
609 .Case("debug_info", &InfoSection.Data)
610 .Case("debug_abbrev", &AbbrevSection)
611 .Case("debug_loc", &LocSection.Data)
612 .Case("debug_line", &LineSection.Data)
613 .Case("debug_aranges", &ARangeSection)
614 .Case("debug_frame", &DebugFrameSection)
615 .Case("debug_str", &StringSection)
616 .Case("debug_ranges", &RangeSection)
617 .Case("debug_pubnames", &PubNamesSection)
618 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
619 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
620 .Case("debug_info.dwo", &InfoDWOSection.Data)
621 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
622 .Case("debug_str.dwo", &StringDWOSection)
623 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
624 .Case("debug_addr", &AddrSection)
625 // Any more debug info sections go here.
629 if (name == "debug_ranges") {
630 // FIXME: Use the other dwo range section when we emit it.
631 RangeDWOSection = data;
633 } else if (name == "debug_types") {
634 // Find debug_types data by section rather than name as there are
635 // multiple, comdat grouped, debug_types sections.
636 TypesSections[*i].Data = data;
639 section_iterator RelocatedSection = i->getRelocatedSection();
640 if (RelocatedSection == Obj->end_sections())
643 StringRef RelSecName;
644 RelocatedSection->getName(RelSecName);
645 RelSecName = RelSecName.substr(
646 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
648 // TODO: Add support for relocations in other sections as needed.
649 // Record relocations for the debug_info and debug_line sections.
650 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
651 .Case("debug_info", &InfoSection.Relocs)
652 .Case("debug_loc", &LocSection.Relocs)
653 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
654 .Case("debug_line", &LineSection.Relocs)
657 if (RelSecName != "debug_types")
659 // Find debug_types relocs by section rather than name as there are
660 // multiple, comdat grouped, debug_types sections.
661 Map = &TypesSections[*RelocatedSection].Relocs;
664 if (i->begin_relocations() != i->end_relocations()) {
665 uint64_t SectionSize;
666 RelocatedSection->getSize(SectionSize);
667 for (object::relocation_iterator reloc_i = i->begin_relocations(),
668 reloc_e = i->end_relocations();
669 reloc_i != reloc_e; reloc_i.increment(ec)) {
671 reloc_i->getOffset(Address);
673 reloc_i->getType(Type);
674 uint64_t SymAddr = 0;
675 // ELF relocations may need the symbol address
677 object::symbol_iterator Sym = reloc_i->getSymbol();
678 Sym->getAddress(SymAddr);
681 object::RelocVisitor V(Obj->getFileFormatName());
682 // The section address is always 0 for debug sections.
683 object::RelocToApply R(V.visit(Type, *reloc_i, 0, SymAddr));
685 SmallString<32> Name;
686 error_code ec(reloc_i->getTypeName(Name));
688 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
690 errs() << "error: failed to compute relocation: "
695 if (Address + R.Width > SectionSize) {
696 errs() << "error: " << R.Width << "-byte relocation starting "
697 << Address << " bytes into section " << name << " which is "
698 << SectionSize << " bytes long.\n";
702 errs() << "error: can't handle a relocation of more than 8 bytes at "
706 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
707 << " at " << format("%p", Address)
708 << " with width " << format("%d", R.Width)
710 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
716 DWARFContextInMemory::~DWARFContextInMemory() {
717 DeleteContainerPointers(UncompressedSections);
720 void DWARFContextInMemory::anchor() { }