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/STLExtras.h"
12 #include "llvm/ADT/SmallString.h"
13 #include "llvm/ADT/StringSwitch.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(TUs);
29 DeleteContainerPointers(DWOCUs);
30 DeleteContainerPointers(DWOTUs);
33 static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
34 bool LittleEndian, bool GnuStyle) {
35 OS << "\n." << Name << " contents:\n";
36 DataExtractor pubNames(Data, LittleEndian, 0);
38 while (pubNames.isValidOffset(offset)) {
39 OS << "length = " << format("0x%08x", pubNames.getU32(&offset));
40 OS << " version = " << format("0x%04x", pubNames.getU16(&offset));
41 OS << " unit_offset = " << format("0x%08x", pubNames.getU32(&offset));
42 OS << " unit_size = " << format("0x%08x", pubNames.getU32(&offset)) << '\n';
44 OS << "Offset Linkage Kind Name\n";
46 OS << "Offset Name\n";
48 while (offset < Data.size()) {
49 uint32_t dieRef = pubNames.getU32(&offset);
52 OS << format("0x%8.8x ", dieRef);
54 PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
55 OS << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
56 << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
59 OS << '\"' << pubNames.getCStr(&offset) << "\"\n";
64 void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
65 if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
66 OS << ".debug_abbrev contents:\n";
67 getDebugAbbrev()->dump(OS);
70 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo)
71 if (const DWARFDebugAbbrev *D = getDebugAbbrevDWO()) {
72 OS << "\n.debug_abbrev.dwo contents:\n";
76 if (DumpType == DIDT_All || DumpType == DIDT_Info) {
77 OS << "\n.debug_info contents:\n";
78 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i)
79 getCompileUnitAtIndex(i)->dump(OS);
82 if ((DumpType == DIDT_All || DumpType == DIDT_InfoDwo) &&
83 getNumDWOCompileUnits()) {
84 OS << "\n.debug_info.dwo contents:\n";
85 for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
86 getDWOCompileUnitAtIndex(i)->dump(OS);
89 if ((DumpType == DIDT_All || DumpType == DIDT_Types) && getNumTypeUnits()) {
90 OS << "\n.debug_types contents:\n";
91 for (unsigned i = 0, e = getNumTypeUnits(); i != e; ++i)
92 getTypeUnitAtIndex(i)->dump(OS);
95 if (DumpType == DIDT_All || DumpType == DIDT_TypesDwo)
96 if (getNumDWOTypeUnits()) {
97 OS << "\n.debug_types.dwo contents:\n";
98 for (unsigned i = 0, e = getNumDWOTypeUnits(); i != e; ++i)
99 getDWOTypeUnitAtIndex(i)->dump(OS);
102 if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
103 OS << "\n.debug_loc contents:\n";
104 getDebugLoc()->dump(OS);
107 if (DumpType == DIDT_All || DumpType == DIDT_Frames) {
108 OS << "\n.debug_frame contents:\n";
109 getDebugFrame()->dump(OS);
113 if (DumpType == DIDT_All || DumpType == DIDT_Aranges) {
114 OS << "\n.debug_aranges contents:\n";
115 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
116 DWARFDebugArangeSet set;
117 while (set.extract(arangesData, &offset))
121 uint8_t savedAddressByteSize = 0;
122 if (DumpType == DIDT_All || DumpType == DIDT_Line) {
123 OS << "\n.debug_line contents:\n";
124 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i) {
125 DWARFCompileUnit *cu = getCompileUnitAtIndex(i);
126 savedAddressByteSize = cu->getAddressByteSize();
127 unsigned stmtOffset =
128 cu->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
129 cu, DW_AT_stmt_list, -1U);
130 if (stmtOffset != -1U) {
131 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
132 savedAddressByteSize);
133 DWARFDebugLine::DumpingState state(OS);
134 DWARFDebugLine::parseStatementTable(lineData, &getLineSection().Relocs, &stmtOffset, state);
139 if (DumpType == DIDT_All || DumpType == DIDT_Str) {
140 OS << "\n.debug_str contents:\n";
141 DataExtractor strData(getStringSection(), isLittleEndian(), 0);
143 uint32_t strOffset = 0;
144 while (const char *s = strData.getCStr(&offset)) {
145 OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
150 if ((DumpType == DIDT_All || DumpType == DIDT_StrDwo) &&
151 !getStringDWOSection().empty()) {
152 OS << "\n.debug_str.dwo contents:\n";
153 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
155 uint32_t strDWOOffset = 0;
156 while (const char *s = strDWOData.getCStr(&offset)) {
157 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
158 strDWOOffset = offset;
162 if (DumpType == DIDT_All || DumpType == DIDT_Ranges) {
163 OS << "\n.debug_ranges contents:\n";
164 // In fact, different compile units may have different address byte
165 // sizes, but for simplicity we just use the address byte size of the last
166 // compile unit (there is no easy and fast way to associate address range
167 // list and the compile unit it describes).
168 DataExtractor rangesData(getRangeSection(), isLittleEndian(),
169 savedAddressByteSize);
171 DWARFDebugRangeList rangeList;
172 while (rangeList.extract(rangesData, &offset))
176 if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
177 dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
178 isLittleEndian(), false);
180 if (DumpType == DIDT_All || DumpType == DIDT_Pubtypes)
181 dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
182 isLittleEndian(), false);
184 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
185 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
186 isLittleEndian(), true /* GnuStyle */);
188 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
189 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
190 isLittleEndian(), true /* GnuStyle */);
192 if ((DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo) &&
193 !getStringOffsetDWOSection().empty()) {
194 OS << "\n.debug_str_offsets.dwo contents:\n";
195 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(),
198 uint64_t size = getStringOffsetDWOSection().size();
199 while (offset < size) {
200 OS << format("0x%8.8x: ", offset);
201 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
206 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
210 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
212 Abbrev.reset(new DWARFDebugAbbrev());
213 Abbrev->parse(abbrData);
217 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
219 return AbbrevDWO.get();
221 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
222 AbbrevDWO.reset(new DWARFDebugAbbrev());
223 AbbrevDWO->parse(abbrData);
224 return AbbrevDWO.get();
227 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
231 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
232 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
233 // assume all compile units have the same address byte size
234 if (getNumCompileUnits())
235 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
239 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
241 return Aranges.get();
243 Aranges.reset(new DWARFDebugAranges());
244 Aranges->generate(this);
245 return Aranges.get();
248 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
250 return DebugFrame.get();
252 // There's a "bug" in the DWARFv3 standard with respect to the target address
253 // size within debug frame sections. While DWARF is supposed to be independent
254 // of its container, FDEs have fields with size being "target address size",
255 // which isn't specified in DWARF in general. It's only specified for CUs, but
256 // .eh_frame can appear without a .debug_info section. Follow the example of
257 // other tools (libdwarf) and extract this from the container (ObjectFile
258 // provides this information). This problem is fixed in DWARFv4
259 // See this dwarf-discuss discussion for more details:
260 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
261 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
263 DebugFrame.reset(new DWARFDebugFrame());
264 DebugFrame->parse(debugFrameData);
265 return DebugFrame.get();
268 const DWARFLineTable *
269 DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
271 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
273 unsigned stmtOffset =
274 cu->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
275 cu, DW_AT_stmt_list, -1U);
276 if (stmtOffset == -1U)
277 return 0; // No line table for this compile unit.
279 // See if the line table is cached.
280 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
283 // We have to parse it first.
284 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
285 cu->getAddressByteSize());
286 return Line->getOrParseLineTable(lineData, stmtOffset);
289 void DWARFContext::parseCompileUnits() {
291 const DataExtractor &DIData = DataExtractor(getInfoSection().Data,
292 isLittleEndian(), 0);
293 while (DIData.isValidOffset(offset)) {
294 OwningPtr<DWARFCompileUnit> CU(new DWARFCompileUnit(
295 getDebugAbbrev(), getInfoSection().Data, getAbbrevSection(),
296 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
297 &getInfoSection().Relocs, isLittleEndian()));
298 if (!CU->extract(DIData, &offset)) {
301 CUs.push_back(CU.take());
302 offset = CUs.back()->getNextUnitOffset();
306 void DWARFContext::parseTypeUnits() {
307 const TypeSectionMap &Sections = getTypesSections();
308 for (TypeSectionMap::const_iterator I = Sections.begin(), E = Sections.end();
311 const DataExtractor &DIData =
312 DataExtractor(I->second.Data, isLittleEndian(), 0);
313 while (DIData.isValidOffset(offset)) {
314 OwningPtr<DWARFTypeUnit> TU(new DWARFTypeUnit(
315 getDebugAbbrev(), I->second.Data, getAbbrevSection(),
316 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
317 &I->second.Relocs, isLittleEndian()));
318 if (!TU->extract(DIData, &offset))
320 TUs.push_back(TU.take());
321 offset = TUs.back()->getNextUnitOffset();
326 void DWARFContext::parseDWOCompileUnits() {
328 const DataExtractor &DIData =
329 DataExtractor(getInfoDWOSection().Data, isLittleEndian(), 0);
330 while (DIData.isValidOffset(offset)) {
331 OwningPtr<DWARFCompileUnit> DWOCU(new DWARFCompileUnit(
332 getDebugAbbrevDWO(), getInfoDWOSection().Data, getAbbrevDWOSection(),
333 getRangeDWOSection(), getStringDWOSection(),
334 getStringOffsetDWOSection(), getAddrSection(),
335 &getInfoDWOSection().Relocs, isLittleEndian()));
336 if (!DWOCU->extract(DIData, &offset)) {
339 DWOCUs.push_back(DWOCU.take());
340 offset = DWOCUs.back()->getNextUnitOffset();
344 void DWARFContext::parseDWOTypeUnits() {
345 const TypeSectionMap &Sections = getTypesDWOSections();
346 for (TypeSectionMap::const_iterator I = Sections.begin(), E = Sections.end();
349 const DataExtractor &DIData =
350 DataExtractor(I->second.Data, isLittleEndian(), 0);
351 while (DIData.isValidOffset(offset)) {
352 OwningPtr<DWARFTypeUnit> TU(new DWARFTypeUnit(
353 getDebugAbbrevDWO(), I->second.Data, getAbbrevDWOSection(),
354 getRangeDWOSection(), getStringDWOSection(),
355 getStringOffsetDWOSection(), getAddrSection(), &I->second.Relocs,
357 if (!TU->extract(DIData, &offset))
359 DWOTUs.push_back(TU.take());
360 offset = DWOTUs.back()->getNextUnitOffset();
366 struct OffsetComparator {
367 bool operator()(const DWARFCompileUnit *LHS,
368 const DWARFCompileUnit *RHS) const {
369 return LHS->getOffset() < RHS->getOffset();
371 bool operator()(const DWARFCompileUnit *LHS, uint32_t RHS) const {
372 return LHS->getOffset() < RHS;
374 bool operator()(uint32_t LHS, const DWARFCompileUnit *RHS) const {
375 return LHS < RHS->getOffset();
380 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
384 DWARFCompileUnit **CU =
385 std::lower_bound(CUs.begin(), CUs.end(), Offset, OffsetComparator());
386 if (CU != CUs.end()) {
392 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
393 // First, get the offset of the compile unit.
394 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
395 // Retrieve the compile unit.
396 return getCompileUnitForOffset(CUOffset);
399 static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
400 const DWARFLineTable *LineTable,
402 bool NeedsAbsoluteFilePath,
403 std::string &FileName) {
406 !LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
409 if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
410 // We may still need to append compilation directory of compile unit.
411 SmallString<16> AbsolutePath;
412 if (const char *CompilationDir = CU->getCompilationDir()) {
413 sys::path::append(AbsolutePath, CompilationDir);
415 sys::path::append(AbsolutePath, FileName);
416 FileName = AbsolutePath.str();
421 static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
422 const DWARFLineTable *LineTable,
424 bool NeedsAbsoluteFilePath,
425 std::string &FileName,
426 uint32_t &Line, uint32_t &Column) {
427 if (CU == 0 || LineTable == 0)
429 // Get the index of row we're looking for in the line table.
430 uint32_t RowIndex = LineTable->lookupAddress(Address);
433 // Take file number and line/column from the row.
434 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
435 if (!getFileNameForCompileUnit(CU, LineTable, Row.File,
436 NeedsAbsoluteFilePath, FileName))
443 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
444 DILineInfoSpecifier Specifier) {
445 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
448 std::string FileName = "<invalid>";
449 std::string FunctionName = "<invalid>";
452 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
453 // The address may correspond to instruction in some inlined function,
454 // so we have to build the chain of inlined functions and take the
455 // name of the topmost function in it.
456 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
457 CU->getInlinedChainForAddress(Address);
458 if (InlinedChain.DIEs.size() > 0) {
459 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
460 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
464 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
465 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
466 const bool NeedsAbsoluteFilePath =
467 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
468 getFileLineInfoForCompileUnit(CU, LineTable, Address,
469 NeedsAbsoluteFilePath,
470 FileName, Line, Column);
472 return DILineInfo(StringRef(FileName), StringRef(FunctionName),
476 DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
478 DILineInfoSpecifier Specifier) {
479 DILineInfoTable Lines;
480 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
484 std::string FunctionName = "<invalid>";
485 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
486 // The address may correspond to instruction in some inlined function,
487 // so we have to build the chain of inlined functions and take the
488 // name of the topmost function in it.
489 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
490 CU->getInlinedChainForAddress(Address);
491 if (InlinedChain.DIEs.size() > 0) {
492 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
493 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
498 // If the Specifier says we don't need FileLineInfo, just
499 // return the top-most function at the starting address.
500 if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
502 std::make_pair(Address, DILineInfo("<invalid>", FunctionName, 0, 0)));
506 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
507 const bool NeedsAbsoluteFilePath =
508 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
510 // Get the index of row we're looking for in the line table.
511 std::vector<uint32_t> RowVector;
512 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
515 uint32_t NumRows = RowVector.size();
516 for (uint32_t i = 0; i < NumRows; ++i) {
517 uint32_t RowIndex = RowVector[i];
518 // Take file number and line/column from the row.
519 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
520 std::string FileName = "<invalid>";
521 getFileNameForCompileUnit(CU, LineTable, Row.File,
522 NeedsAbsoluteFilePath, FileName);
523 Lines.push_back(std::make_pair(
524 Row.Address, DILineInfo(FileName, FunctionName, Row.Line, Row.Column)));
530 DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
531 DILineInfoSpecifier Specifier) {
532 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
534 return DIInliningInfo();
536 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
537 CU->getInlinedChainForAddress(Address);
538 if (InlinedChain.DIEs.size() == 0)
539 return DIInliningInfo();
541 DIInliningInfo InliningInfo;
542 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
543 const DWARFLineTable *LineTable = 0;
544 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
545 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
546 std::string FileName = "<invalid>";
547 std::string FunctionName = "<invalid>";
550 // Get function name if necessary.
551 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
552 if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
555 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
556 const bool NeedsAbsoluteFilePath =
557 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
559 // For the topmost frame, initialize the line table of this
560 // compile unit and fetch file/line info from it.
561 LineTable = getLineTableForCompileUnit(CU);
562 // For the topmost routine, get file/line info from line table.
563 getFileLineInfoForCompileUnit(CU, LineTable, Address,
564 NeedsAbsoluteFilePath,
565 FileName, Line, Column);
567 // Otherwise, use call file, call line and call column from
568 // previous DIE in inlined chain.
569 getFileNameForCompileUnit(CU, LineTable, CallFile,
570 NeedsAbsoluteFilePath, FileName);
574 // Get call file/line/column of a current DIE.
576 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
580 DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
582 InliningInfo.addFrame(Frame);
587 static bool consumeCompressedDebugSectionHeader(StringRef &data,
588 uint64_t &OriginalSize) {
589 // Consume "ZLIB" prefix.
590 if (!data.startswith("ZLIB"))
592 data = data.substr(4);
593 // Consume uncompressed section size (big-endian 8 bytes).
594 DataExtractor extractor(data, false, 8);
596 OriginalSize = extractor.getU64(&Offset);
599 data = data.substr(Offset);
603 DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
604 IsLittleEndian(Obj->isLittleEndian()),
605 AddressSize(Obj->getBytesInAddress()) {
606 for (object::section_iterator i = Obj->section_begin(),
607 e = Obj->section_end();
612 i->getContents(data);
614 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
616 // Check if debug info section is compressed with zlib.
617 if (name.startswith("zdebug_")) {
618 uint64_t OriginalSize;
619 if (!zlib::isAvailable() ||
620 !consumeCompressedDebugSectionHeader(data, OriginalSize))
622 OwningPtr<MemoryBuffer> UncompressedSection;
623 if (zlib::uncompress(data, UncompressedSection, OriginalSize) !=
626 // Make data point to uncompressed section contents and save its contents.
627 name = name.substr(1);
628 data = UncompressedSection->getBuffer();
629 UncompressedSections.push_back(UncompressedSection.take());
633 StringSwitch<StringRef *>(name)
634 .Case("debug_info", &InfoSection.Data)
635 .Case("debug_abbrev", &AbbrevSection)
636 .Case("debug_loc", &LocSection.Data)
637 .Case("debug_line", &LineSection.Data)
638 .Case("debug_aranges", &ARangeSection)
639 .Case("debug_frame", &DebugFrameSection)
640 .Case("debug_str", &StringSection)
641 .Case("debug_ranges", &RangeSection)
642 .Case("debug_pubnames", &PubNamesSection)
643 .Case("debug_pubtypes", &PubTypesSection)
644 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
645 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
646 .Case("debug_info.dwo", &InfoDWOSection.Data)
647 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
648 .Case("debug_str.dwo", &StringDWOSection)
649 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
650 .Case("debug_addr", &AddrSection)
651 // Any more debug info sections go here.
655 if (name == "debug_ranges") {
656 // FIXME: Use the other dwo range section when we emit it.
657 RangeDWOSection = data;
659 } else if (name == "debug_types") {
660 // Find debug_types data by section rather than name as there are
661 // multiple, comdat grouped, debug_types sections.
662 TypesSections[*i].Data = data;
663 } else if (name == "debug_types.dwo") {
664 TypesDWOSections[*i].Data = data;
667 section_iterator RelocatedSection = i->getRelocatedSection();
668 if (RelocatedSection == Obj->section_end())
671 StringRef RelSecName;
672 RelocatedSection->getName(RelSecName);
673 RelSecName = RelSecName.substr(
674 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
676 // TODO: Add support for relocations in other sections as needed.
677 // Record relocations for the debug_info and debug_line sections.
678 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
679 .Case("debug_info", &InfoSection.Relocs)
680 .Case("debug_loc", &LocSection.Relocs)
681 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
682 .Case("debug_line", &LineSection.Relocs)
685 // Find debug_types relocs by section rather than name as there are
686 // multiple, comdat grouped, debug_types sections.
687 if (RelSecName == "debug_types")
688 Map = &TypesSections[*RelocatedSection].Relocs;
689 else if (RelSecName == "debug_types.dwo")
690 Map = &TypesDWOSections[*RelocatedSection].Relocs;
695 if (i->relocation_begin() != i->relocation_end()) {
696 uint64_t SectionSize;
697 RelocatedSection->getSize(SectionSize);
698 for (object::relocation_iterator reloc_i = i->relocation_begin(),
699 reloc_e = i->relocation_end();
700 reloc_i != reloc_e; ++reloc_i) {
702 reloc_i->getOffset(Address);
704 reloc_i->getType(Type);
705 uint64_t SymAddr = 0;
706 // ELF relocations may need the symbol address
708 object::symbol_iterator Sym = reloc_i->getSymbol();
709 Sym->getAddress(SymAddr);
712 object::RelocVisitor V(Obj->getFileFormatName());
713 // The section address is always 0 for debug sections.
714 object::RelocToApply R(V.visit(Type, *reloc_i, 0, SymAddr));
716 SmallString<32> Name;
717 error_code ec(reloc_i->getTypeName(Name));
719 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
721 errs() << "error: failed to compute relocation: "
726 if (Address + R.Width > SectionSize) {
727 errs() << "error: " << R.Width << "-byte relocation starting "
728 << Address << " bytes into section " << name << " which is "
729 << SectionSize << " bytes long.\n";
733 errs() << "error: can't handle a relocation of more than 8 bytes at "
737 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
738 << " at " << format("%p", Address)
739 << " with width " << format("%d", R.Width)
741 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
747 DWARFContextInMemory::~DWARFContextInMemory() {
748 DeleteContainerPointers(UncompressedSections);
751 void DWARFContextInMemory::anchor() { }