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_Pubtypes)
147 dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
148 isLittleEndian(), false);
150 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
151 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
152 isLittleEndian(), true /* GnuStyle */);
154 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
155 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
156 isLittleEndian(), true /* GnuStyle */);
158 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo) {
159 const DWARFDebugAbbrev *D = getDebugAbbrevDWO();
161 OS << "\n.debug_abbrev.dwo contents:\n";
162 getDebugAbbrevDWO()->dump(OS);
166 if (DumpType == DIDT_All || DumpType == DIDT_InfoDwo)
167 if (getNumDWOCompileUnits()) {
168 OS << "\n.debug_info.dwo contents:\n";
169 for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
170 getDWOCompileUnitAtIndex(i)->dump(OS);
173 if (DumpType == DIDT_All || DumpType == DIDT_StrDwo)
174 if (!getStringDWOSection().empty()) {
175 OS << "\n.debug_str.dwo contents:\n";
176 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
178 uint32_t strDWOOffset = 0;
179 while (const char *s = strDWOData.getCStr(&offset)) {
180 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
181 strDWOOffset = offset;
185 if (DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo)
186 if (!getStringOffsetDWOSection().empty()) {
187 OS << "\n.debug_str_offsets.dwo contents:\n";
188 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(), 0);
190 uint64_t size = getStringOffsetDWOSection().size();
191 while (offset < size) {
192 OS << format("0x%8.8x: ", offset);
193 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
198 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
202 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
204 Abbrev.reset(new DWARFDebugAbbrev());
205 Abbrev->parse(abbrData);
209 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
211 return AbbrevDWO.get();
213 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
214 AbbrevDWO.reset(new DWARFDebugAbbrev());
215 AbbrevDWO->parse(abbrData);
216 return AbbrevDWO.get();
219 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
223 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
224 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
225 // assume all compile units have the same address byte size
226 if (getNumCompileUnits())
227 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
231 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
233 return Aranges.get();
235 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
237 Aranges.reset(new DWARFDebugAranges());
238 Aranges->extract(arangesData);
239 // Generate aranges from DIEs: even if .debug_aranges section is present,
240 // it may describe only a small subset of compilation units, so we need to
241 // manually build aranges for the rest of them.
242 Aranges->generate(this);
243 return Aranges.get();
246 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
248 return DebugFrame.get();
250 // There's a "bug" in the DWARFv3 standard with respect to the target address
251 // size within debug frame sections. While DWARF is supposed to be independent
252 // of its container, FDEs have fields with size being "target address size",
253 // which isn't specified in DWARF in general. It's only specified for CUs, but
254 // .eh_frame can appear without a .debug_info section. Follow the example of
255 // other tools (libdwarf) and extract this from the container (ObjectFile
256 // provides this information). This problem is fixed in DWARFv4
257 // See this dwarf-discuss discussion for more details:
258 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
259 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
261 DebugFrame.reset(new DWARFDebugFrame());
262 DebugFrame->parse(debugFrameData);
263 return DebugFrame.get();
266 const DWARFLineTable *
267 DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
269 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
271 unsigned stmtOffset =
272 cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
274 if (stmtOffset == -1U)
275 return 0; // No line table for this compile unit.
277 // See if the line table is cached.
278 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
281 // We have to parse it first.
282 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
283 cu->getAddressByteSize());
284 return Line->getOrParseLineTable(lineData, stmtOffset);
287 void DWARFContext::parseCompileUnits() {
289 const DataExtractor &DIData = DataExtractor(getInfoSection().Data,
290 isLittleEndian(), 0);
291 while (DIData.isValidOffset(offset)) {
292 OwningPtr<DWARFCompileUnit> CU(new DWARFCompileUnit(
293 getDebugAbbrev(), getInfoSection().Data, getAbbrevSection(),
294 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
295 &getInfoSection().Relocs, isLittleEndian()));
296 if (!CU->extract(DIData, &offset)) {
299 CUs.push_back(CU.take());
300 offset = CUs.back()->getNextUnitOffset();
304 void DWARFContext::parseTypeUnits() {
305 const std::map<object::SectionRef, Section> &Sections = getTypesSections();
306 for (std::map<object::SectionRef, Section>::const_iterator
307 I = Sections.begin(),
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();
345 struct OffsetComparator {
346 bool operator()(const DWARFCompileUnit *LHS,
347 const DWARFCompileUnit *RHS) const {
348 return LHS->getOffset() < RHS->getOffset();
350 bool operator()(const DWARFCompileUnit *LHS, uint32_t RHS) const {
351 return LHS->getOffset() < RHS;
353 bool operator()(uint32_t LHS, const DWARFCompileUnit *RHS) const {
354 return LHS < RHS->getOffset();
359 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
363 DWARFCompileUnit **CU =
364 std::lower_bound(CUs.begin(), CUs.end(), Offset, OffsetComparator());
365 if (CU != CUs.end()) {
371 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
372 // First, get the offset of the compile unit.
373 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
374 // Retrieve the compile unit.
375 return getCompileUnitForOffset(CUOffset);
378 static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
379 const DWARFLineTable *LineTable,
381 bool NeedsAbsoluteFilePath,
382 std::string &FileName) {
385 !LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
388 if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
389 // We may still need to append compilation directory of compile unit.
390 SmallString<16> AbsolutePath;
391 if (const char *CompilationDir = CU->getCompilationDir()) {
392 sys::path::append(AbsolutePath, CompilationDir);
394 sys::path::append(AbsolutePath, FileName);
395 FileName = AbsolutePath.str();
400 static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
401 const DWARFLineTable *LineTable,
403 bool NeedsAbsoluteFilePath,
404 std::string &FileName,
405 uint32_t &Line, uint32_t &Column) {
406 if (CU == 0 || LineTable == 0)
408 // Get the index of row we're looking for in the line table.
409 uint32_t RowIndex = LineTable->lookupAddress(Address);
412 // Take file number and line/column from the row.
413 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
414 if (!getFileNameForCompileUnit(CU, LineTable, Row.File,
415 NeedsAbsoluteFilePath, FileName))
422 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
423 DILineInfoSpecifier Specifier) {
424 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
427 std::string FileName = "<invalid>";
428 std::string FunctionName = "<invalid>";
431 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
432 // The address may correspond to instruction in some inlined function,
433 // so we have to build the chain of inlined functions and take the
434 // name of the topmost function in it.
435 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
436 CU->getInlinedChainForAddress(Address);
437 if (InlinedChain.DIEs.size() > 0) {
438 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
439 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
443 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
444 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
445 const bool NeedsAbsoluteFilePath =
446 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
447 getFileLineInfoForCompileUnit(CU, LineTable, Address,
448 NeedsAbsoluteFilePath,
449 FileName, Line, Column);
451 return DILineInfo(StringRef(FileName), StringRef(FunctionName),
455 DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
457 DILineInfoSpecifier Specifier) {
458 DILineInfoTable Lines;
459 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
463 std::string FunctionName = "<invalid>";
464 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
465 // The address may correspond to instruction in some inlined function,
466 // so we have to build the chain of inlined functions and take the
467 // name of the topmost function in it.
468 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
469 CU->getInlinedChainForAddress(Address);
470 if (InlinedChain.DIEs.size() > 0) {
471 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
472 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
477 // If the Specifier says we don't need FileLineInfo, just
478 // return the top-most function at the starting address.
479 if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
481 std::make_pair(Address, DILineInfo("<invalid>", FunctionName, 0, 0)));
485 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
486 const bool NeedsAbsoluteFilePath =
487 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
489 // Get the index of row we're looking for in the line table.
490 std::vector<uint32_t> RowVector;
491 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
494 uint32_t NumRows = RowVector.size();
495 for (uint32_t i = 0; i < NumRows; ++i) {
496 uint32_t RowIndex = RowVector[i];
497 // Take file number and line/column from the row.
498 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
499 std::string FileName = "<invalid>";
500 getFileNameForCompileUnit(CU, LineTable, Row.File,
501 NeedsAbsoluteFilePath, FileName);
502 Lines.push_back(std::make_pair(
503 Row.Address, DILineInfo(FileName, FunctionName, Row.Line, Row.Column)));
509 DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
510 DILineInfoSpecifier Specifier) {
511 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
513 return DIInliningInfo();
515 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
516 CU->getInlinedChainForAddress(Address);
517 if (InlinedChain.DIEs.size() == 0)
518 return DIInliningInfo();
520 DIInliningInfo InliningInfo;
521 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
522 const DWARFLineTable *LineTable = 0;
523 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
524 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
525 std::string FileName = "<invalid>";
526 std::string FunctionName = "<invalid>";
529 // Get function name if necessary.
530 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
531 if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
534 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
535 const bool NeedsAbsoluteFilePath =
536 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
538 // For the topmost frame, initialize the line table of this
539 // compile unit and fetch file/line info from it.
540 LineTable = getLineTableForCompileUnit(CU);
541 // For the topmost routine, get file/line info from line table.
542 getFileLineInfoForCompileUnit(CU, LineTable, Address,
543 NeedsAbsoluteFilePath,
544 FileName, Line, Column);
546 // Otherwise, use call file, call line and call column from
547 // previous DIE in inlined chain.
548 getFileNameForCompileUnit(CU, LineTable, CallFile,
549 NeedsAbsoluteFilePath, FileName);
553 // Get call file/line/column of a current DIE.
555 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
559 DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
561 InliningInfo.addFrame(Frame);
566 static bool consumeCompressedDebugSectionHeader(StringRef &data,
567 uint64_t &OriginalSize) {
568 // Consume "ZLIB" prefix.
569 if (!data.startswith("ZLIB"))
571 data = data.substr(4);
572 // Consume uncompressed section size (big-endian 8 bytes).
573 DataExtractor extractor(data, false, 8);
575 OriginalSize = extractor.getU64(&Offset);
578 data = data.substr(Offset);
582 DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
583 IsLittleEndian(Obj->isLittleEndian()),
584 AddressSize(Obj->getBytesInAddress()) {
586 for (object::section_iterator i = Obj->begin_sections(),
587 e = Obj->end_sections();
588 i != e; i.increment(ec)) {
592 i->getContents(data);
594 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
596 // Check if debug info section is compressed with zlib.
597 if (name.startswith("zdebug_")) {
598 uint64_t OriginalSize;
599 if (!zlib::isAvailable() ||
600 !consumeCompressedDebugSectionHeader(data, OriginalSize))
602 OwningPtr<MemoryBuffer> UncompressedSection;
603 if (zlib::uncompress(data, UncompressedSection, OriginalSize) !=
606 // Make data point to uncompressed section contents and save its contents.
607 name = name.substr(1);
608 data = UncompressedSection->getBuffer();
609 UncompressedSections.push_back(UncompressedSection.take());
613 StringSwitch<StringRef *>(name)
614 .Case("debug_info", &InfoSection.Data)
615 .Case("debug_abbrev", &AbbrevSection)
616 .Case("debug_loc", &LocSection.Data)
617 .Case("debug_line", &LineSection.Data)
618 .Case("debug_aranges", &ARangeSection)
619 .Case("debug_frame", &DebugFrameSection)
620 .Case("debug_str", &StringSection)
621 .Case("debug_ranges", &RangeSection)
622 .Case("debug_pubnames", &PubNamesSection)
623 .Case("debug_pubtypes", &PubTypesSection)
624 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
625 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
626 .Case("debug_info.dwo", &InfoDWOSection.Data)
627 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
628 .Case("debug_str.dwo", &StringDWOSection)
629 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
630 .Case("debug_addr", &AddrSection)
631 // Any more debug info sections go here.
635 if (name == "debug_ranges") {
636 // FIXME: Use the other dwo range section when we emit it.
637 RangeDWOSection = data;
639 } else if (name == "debug_types") {
640 // Find debug_types data by section rather than name as there are
641 // multiple, comdat grouped, debug_types sections.
642 TypesSections[*i].Data = data;
645 section_iterator RelocatedSection = i->getRelocatedSection();
646 if (RelocatedSection == Obj->end_sections())
649 StringRef RelSecName;
650 RelocatedSection->getName(RelSecName);
651 RelSecName = RelSecName.substr(
652 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
654 // TODO: Add support for relocations in other sections as needed.
655 // Record relocations for the debug_info and debug_line sections.
656 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
657 .Case("debug_info", &InfoSection.Relocs)
658 .Case("debug_loc", &LocSection.Relocs)
659 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
660 .Case("debug_line", &LineSection.Relocs)
663 if (RelSecName != "debug_types")
665 // Find debug_types relocs by section rather than name as there are
666 // multiple, comdat grouped, debug_types sections.
667 Map = &TypesSections[*RelocatedSection].Relocs;
670 if (i->begin_relocations() != i->end_relocations()) {
671 uint64_t SectionSize;
672 RelocatedSection->getSize(SectionSize);
673 for (object::relocation_iterator reloc_i = i->begin_relocations(),
674 reloc_e = i->end_relocations();
675 reloc_i != reloc_e; reloc_i.increment(ec)) {
677 reloc_i->getOffset(Address);
679 reloc_i->getType(Type);
680 uint64_t SymAddr = 0;
681 // ELF relocations may need the symbol address
683 object::symbol_iterator Sym = reloc_i->getSymbol();
684 Sym->getAddress(SymAddr);
687 object::RelocVisitor V(Obj->getFileFormatName());
688 // The section address is always 0 for debug sections.
689 object::RelocToApply R(V.visit(Type, *reloc_i, 0, SymAddr));
691 SmallString<32> Name;
692 error_code ec(reloc_i->getTypeName(Name));
694 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
696 errs() << "error: failed to compute relocation: "
701 if (Address + R.Width > SectionSize) {
702 errs() << "error: " << R.Width << "-byte relocation starting "
703 << Address << " bytes into section " << name << " which is "
704 << SectionSize << " bytes long.\n";
708 errs() << "error: can't handle a relocation of more than 8 bytes at "
712 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
713 << " at " << format("%p", Address)
714 << " with width " << format("%d", R.Width)
716 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
722 DWARFContextInMemory::~DWARFContextInMemory() {
723 DeleteContainerPointers(UncompressedSections);
726 void DWARFContextInMemory::anchor() { }