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 "llvm/DebugInfo/DWARF/DWARFContext.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/StringSwitch.h"
13 #include "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
14 #include "llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h"
15 #include "llvm/Support/Compression.h"
16 #include "llvm/Support/Dwarf.h"
17 #include "llvm/Support/Format.h"
18 #include "llvm/Support/Path.h"
19 #include "llvm/Support/raw_ostream.h"
22 using namespace dwarf;
23 using namespace object;
25 #define DEBUG_TYPE "dwarf"
27 typedef DWARFDebugLine::LineTable DWARFLineTable;
28 typedef DILineInfoSpecifier::FileLineInfoKind FileLineInfoKind;
29 typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
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 while (pubNames.isValidOffset(offset)) {
37 OS << "length = " << format("0x%08x", pubNames.getU32(&offset));
38 OS << " version = " << format("0x%04x", pubNames.getU16(&offset));
39 OS << " unit_offset = " << format("0x%08x", pubNames.getU32(&offset));
40 OS << " unit_size = " << format("0x%08x", pubNames.getU32(&offset)) << '\n';
42 OS << "Offset Linkage Kind Name\n";
44 OS << "Offset Name\n";
46 while (offset < Data.size()) {
47 uint32_t dieRef = pubNames.getU32(&offset);
50 OS << format("0x%8.8x ", dieRef);
52 PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
53 OS << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
54 << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
57 OS << '\"' << pubNames.getCStr(&offset) << "\"\n";
62 static void dumpAccelSection(raw_ostream &OS, StringRef Name,
63 const DWARFSection& Section, StringRef StringSection,
65 DataExtractor AccelSection(Section.Data, LittleEndian, 0);
66 DataExtractor StrData(StringSection, LittleEndian, 0);
67 OS << "\n." << Name << " contents:\n";
68 DWARFAcceleratorTable Accel(AccelSection, StrData, Section.Relocs);
74 void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
75 if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
76 OS << ".debug_abbrev contents:\n";
77 getDebugAbbrev()->dump(OS);
80 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo)
81 if (const DWARFDebugAbbrev *D = getDebugAbbrevDWO()) {
82 OS << "\n.debug_abbrev.dwo contents:\n";
86 if (DumpType == DIDT_All || DumpType == DIDT_Info) {
87 OS << "\n.debug_info contents:\n";
88 for (const auto &CU : compile_units())
92 if ((DumpType == DIDT_All || DumpType == DIDT_InfoDwo) &&
93 getNumDWOCompileUnits()) {
94 OS << "\n.debug_info.dwo contents:\n";
95 for (const auto &DWOCU : dwo_compile_units())
99 if ((DumpType == DIDT_All || DumpType == DIDT_Types) && getNumTypeUnits()) {
100 OS << "\n.debug_types contents:\n";
101 for (const auto &TUS : type_unit_sections())
102 for (const auto &TU : TUS)
106 if ((DumpType == DIDT_All || DumpType == DIDT_TypesDwo) &&
107 getNumDWOTypeUnits()) {
108 OS << "\n.debug_types.dwo contents:\n";
109 for (const auto &DWOTUS : dwo_type_unit_sections())
110 for (const auto &DWOTU : DWOTUS)
114 if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
115 OS << "\n.debug_loc contents:\n";
116 getDebugLoc()->dump(OS);
119 if (DumpType == DIDT_All || DumpType == DIDT_LocDwo) {
120 OS << "\n.debug_loc.dwo contents:\n";
121 getDebugLocDWO()->dump(OS);
124 if (DumpType == DIDT_All || DumpType == DIDT_Frames) {
125 OS << "\n.debug_frame contents:\n";
126 getDebugFrame()->dump(OS);
130 if (DumpType == DIDT_All || DumpType == DIDT_Aranges) {
131 OS << "\n.debug_aranges contents:\n";
132 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
133 DWARFDebugArangeSet set;
134 while (set.extract(arangesData, &offset))
138 uint8_t savedAddressByteSize = 0;
139 if (DumpType == DIDT_All || DumpType == DIDT_Line) {
140 OS << "\n.debug_line contents:\n";
141 for (const auto &CU : compile_units()) {
142 savedAddressByteSize = CU->getAddressByteSize();
143 unsigned stmtOffset =
144 CU->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
145 CU.get(), DW_AT_stmt_list, -1U);
146 if (stmtOffset != -1U) {
147 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
148 savedAddressByteSize);
149 DWARFDebugLine::LineTable LineTable;
150 LineTable.parse(lineData, &getLineSection().Relocs, &stmtOffset);
156 if (DumpType == DIDT_All || DumpType == DIDT_LineDwo) {
157 OS << "\n.debug_line.dwo contents:\n";
158 unsigned stmtOffset = 0;
159 DataExtractor lineData(getLineDWOSection().Data, isLittleEndian(),
160 savedAddressByteSize);
161 DWARFDebugLine::LineTable LineTable;
162 while (LineTable.Prologue.parse(lineData, &stmtOffset)) {
168 if (DumpType == DIDT_All || DumpType == DIDT_Str) {
169 OS << "\n.debug_str contents:\n";
170 DataExtractor strData(getStringSection(), isLittleEndian(), 0);
172 uint32_t strOffset = 0;
173 while (const char *s = strData.getCStr(&offset)) {
174 OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
179 if ((DumpType == DIDT_All || DumpType == DIDT_StrDwo) &&
180 !getStringDWOSection().empty()) {
181 OS << "\n.debug_str.dwo contents:\n";
182 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
184 uint32_t strDWOOffset = 0;
185 while (const char *s = strDWOData.getCStr(&offset)) {
186 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
187 strDWOOffset = offset;
191 if (DumpType == DIDT_All || DumpType == DIDT_Ranges) {
192 OS << "\n.debug_ranges contents:\n";
193 // In fact, different compile units may have different address byte
194 // sizes, but for simplicity we just use the address byte size of the last
195 // compile unit (there is no easy and fast way to associate address range
196 // list and the compile unit it describes).
197 DataExtractor rangesData(getRangeSection(), isLittleEndian(),
198 savedAddressByteSize);
200 DWARFDebugRangeList rangeList;
201 while (rangeList.extract(rangesData, &offset))
205 if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
206 dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
207 isLittleEndian(), false);
209 if (DumpType == DIDT_All || DumpType == DIDT_Pubtypes)
210 dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
211 isLittleEndian(), false);
213 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
214 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
215 isLittleEndian(), true /* GnuStyle */);
217 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
218 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
219 isLittleEndian(), true /* GnuStyle */);
221 if ((DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo) &&
222 !getStringOffsetDWOSection().empty()) {
223 OS << "\n.debug_str_offsets.dwo contents:\n";
224 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(),
227 uint64_t size = getStringOffsetDWOSection().size();
228 while (offset < size) {
229 OS << format("0x%8.8x: ", offset);
230 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
234 if (DumpType == DIDT_All || DumpType == DIDT_AppleNames)
235 dumpAccelSection(OS, "apple_names", getAppleNamesSection(),
236 getStringSection(), isLittleEndian());
238 if (DumpType == DIDT_All || DumpType == DIDT_AppleTypes)
239 dumpAccelSection(OS, "apple_types", getAppleTypesSection(),
240 getStringSection(), isLittleEndian());
242 if (DumpType == DIDT_All || DumpType == DIDT_AppleNamespaces)
243 dumpAccelSection(OS, "apple_namespaces", getAppleNamespacesSection(),
244 getStringSection(), isLittleEndian());
246 if (DumpType == DIDT_All || DumpType == DIDT_AppleObjC)
247 dumpAccelSection(OS, "apple_objc", getAppleObjCSection(),
248 getStringSection(), isLittleEndian());
251 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
255 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
257 Abbrev.reset(new DWARFDebugAbbrev());
258 Abbrev->extract(abbrData);
262 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
264 return AbbrevDWO.get();
266 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
267 AbbrevDWO.reset(new DWARFDebugAbbrev());
268 AbbrevDWO->extract(abbrData);
269 return AbbrevDWO.get();
272 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
276 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
277 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
278 // assume all compile units have the same address byte size
279 if (getNumCompileUnits())
280 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
284 const DWARFDebugLocDWO *DWARFContext::getDebugLocDWO() {
288 DataExtractor LocData(getLocDWOSection().Data, isLittleEndian(), 0);
289 LocDWO.reset(new DWARFDebugLocDWO());
290 LocDWO->parse(LocData);
294 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
296 return Aranges.get();
298 Aranges.reset(new DWARFDebugAranges());
299 Aranges->generate(this);
300 return Aranges.get();
303 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
305 return DebugFrame.get();
307 // There's a "bug" in the DWARFv3 standard with respect to the target address
308 // size within debug frame sections. While DWARF is supposed to be independent
309 // of its container, FDEs have fields with size being "target address size",
310 // which isn't specified in DWARF in general. It's only specified for CUs, but
311 // .eh_frame can appear without a .debug_info section. Follow the example of
312 // other tools (libdwarf) and extract this from the container (ObjectFile
313 // provides this information). This problem is fixed in DWARFv4
314 // See this dwarf-discuss discussion for more details:
315 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
316 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
318 DebugFrame.reset(new DWARFDebugFrame());
319 DebugFrame->parse(debugFrameData);
320 return DebugFrame.get();
323 const DWARFLineTable *
324 DWARFContext::getLineTableForUnit(DWARFUnit *cu) {
326 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
328 unsigned stmtOffset =
329 cu->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
330 cu, DW_AT_stmt_list, -1U);
331 if (stmtOffset == -1U)
332 return nullptr; // No line table for this compile unit.
334 // See if the line table is cached.
335 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
338 // We have to parse it first.
339 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
340 cu->getAddressByteSize());
341 return Line->getOrParseLineTable(lineData, stmtOffset);
344 void DWARFContext::parseCompileUnits() {
345 CUs.parse(*this, getInfoSection());
348 void DWARFContext::parseTypeUnits() {
351 for (const auto &I : getTypesSections()) {
352 TUs.push_back(DWARFUnitSection<DWARFTypeUnit>());
353 TUs.back().parse(*this, I.second);
357 void DWARFContext::parseDWOCompileUnits() {
358 DWOCUs.parseDWO(*this, getInfoDWOSection());
361 void DWARFContext::parseDWOTypeUnits() {
364 for (const auto &I : getTypesDWOSections()) {
365 DWOTUs.push_back(DWARFUnitSection<DWARFTypeUnit>());
366 DWOTUs.back().parseDWO(*this, I.second);
370 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
372 return CUs.getUnitForOffset(Offset);
375 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
376 // First, get the offset of the compile unit.
377 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
378 // Retrieve the compile unit.
379 return getCompileUnitForOffset(CUOffset);
382 static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
383 FunctionNameKind Kind,
384 std::string &FunctionName) {
385 if (Kind == FunctionNameKind::None)
387 // The address may correspond to instruction in some inlined function,
388 // so we have to build the chain of inlined functions and take the
389 // name of the topmost function in it.
390 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
391 CU->getInlinedChainForAddress(Address);
392 if (InlinedChain.DIEs.size() == 0)
394 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
395 if (const char *Name =
396 TopFunctionDIE.getSubroutineName(InlinedChain.U, Kind)) {
403 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
404 DILineInfoSpecifier Spec) {
407 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
410 getFunctionNameForAddress(CU, Address, Spec.FNKind, Result.FunctionName);
411 if (Spec.FLIKind != FileLineInfoKind::None) {
412 if (const DWARFLineTable *LineTable = getLineTableForUnit(CU))
413 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
414 Spec.FLIKind, Result);
420 DWARFContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
421 DILineInfoSpecifier Spec) {
422 DILineInfoTable Lines;
423 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
427 std::string FunctionName = "<invalid>";
428 getFunctionNameForAddress(CU, Address, Spec.FNKind, FunctionName);
430 // If the Specifier says we don't need FileLineInfo, just
431 // return the top-most function at the starting address.
432 if (Spec.FLIKind == FileLineInfoKind::None) {
434 Result.FunctionName = FunctionName;
435 Lines.push_back(std::make_pair(Address, Result));
439 const DWARFLineTable *LineTable = getLineTableForUnit(CU);
441 // Get the index of row we're looking for in the line table.
442 std::vector<uint32_t> RowVector;
443 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
446 for (uint32_t RowIndex : RowVector) {
447 // Take file number and line/column from the row.
448 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
450 LineTable->getFileNameByIndex(Row.File, CU->getCompilationDir(),
451 Spec.FLIKind, Result.FileName);
452 Result.FunctionName = FunctionName;
453 Result.Line = Row.Line;
454 Result.Column = Row.Column;
455 Lines.push_back(std::make_pair(Row.Address, Result));
462 DWARFContext::getInliningInfoForAddress(uint64_t Address,
463 DILineInfoSpecifier Spec) {
464 DIInliningInfo InliningInfo;
466 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
470 const DWARFLineTable *LineTable = nullptr;
471 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
472 CU->getInlinedChainForAddress(Address);
473 if (InlinedChain.DIEs.size() == 0) {
474 // If there is no DIE for address (e.g. it is in unavailable .dwo file),
475 // try to at least get file/line info from symbol table.
476 if (Spec.FLIKind != FileLineInfoKind::None) {
478 LineTable = getLineTableForUnit(CU);
480 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
481 Spec.FLIKind, Frame))
482 InliningInfo.addFrame(Frame);
487 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
488 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
489 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
491 // Get function name if necessary.
492 if (const char *Name =
493 FunctionDIE.getSubroutineName(InlinedChain.U, Spec.FNKind))
494 Frame.FunctionName = Name;
495 if (Spec.FLIKind != FileLineInfoKind::None) {
497 // For the topmost frame, initialize the line table of this
498 // compile unit and fetch file/line info from it.
499 LineTable = getLineTableForUnit(CU);
500 // For the topmost routine, get file/line info from line table.
502 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
503 Spec.FLIKind, Frame);
505 // Otherwise, use call file, call line and call column from
506 // previous DIE in inlined chain.
508 LineTable->getFileNameByIndex(CallFile, CU->getCompilationDir(),
509 Spec.FLIKind, Frame.FileName);
510 Frame.Line = CallLine;
511 Frame.Column = CallColumn;
513 // Get call file/line/column of a current DIE.
515 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
519 InliningInfo.addFrame(Frame);
524 static bool consumeCompressedDebugSectionHeader(StringRef &data,
525 uint64_t &OriginalSize) {
526 // Consume "ZLIB" prefix.
527 if (!data.startswith("ZLIB"))
529 data = data.substr(4);
530 // Consume uncompressed section size (big-endian 8 bytes).
531 DataExtractor extractor(data, false, 8);
533 OriginalSize = extractor.getU64(&Offset);
536 data = data.substr(Offset);
540 DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj)
541 : IsLittleEndian(Obj.isLittleEndian()),
542 AddressSize(Obj.getBytesInAddress()) {
543 for (const SectionRef &Section : Obj.sections()) {
545 Section.getName(name);
546 // Skip BSS and Virtual sections, they aren't interesting.
547 bool IsBSS = Section.isBSS();
550 bool IsVirtual = Section.isVirtual();
554 Section.getContents(data);
556 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
558 // Check if debug info section is compressed with zlib.
559 if (name.startswith("zdebug_")) {
560 uint64_t OriginalSize;
561 if (!zlib::isAvailable() ||
562 !consumeCompressedDebugSectionHeader(data, OriginalSize))
564 UncompressedSections.resize(UncompressedSections.size() + 1);
565 if (zlib::uncompress(data, UncompressedSections.back(), OriginalSize) !=
567 UncompressedSections.pop_back();
570 // Make data point to uncompressed section contents and save its contents.
571 name = name.substr(1);
572 data = UncompressedSections.back();
575 StringRef *SectionData =
576 StringSwitch<StringRef *>(name)
577 .Case("debug_info", &InfoSection.Data)
578 .Case("debug_abbrev", &AbbrevSection)
579 .Case("debug_loc", &LocSection.Data)
580 .Case("debug_line", &LineSection.Data)
581 .Case("debug_aranges", &ARangeSection)
582 .Case("debug_frame", &DebugFrameSection)
583 .Case("debug_str", &StringSection)
584 .Case("debug_ranges", &RangeSection)
585 .Case("debug_pubnames", &PubNamesSection)
586 .Case("debug_pubtypes", &PubTypesSection)
587 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
588 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
589 .Case("debug_info.dwo", &InfoDWOSection.Data)
590 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
591 .Case("debug_loc.dwo", &LocDWOSection.Data)
592 .Case("debug_line.dwo", &LineDWOSection.Data)
593 .Case("debug_str.dwo", &StringDWOSection)
594 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
595 .Case("debug_addr", &AddrSection)
596 .Case("apple_names", &AppleNamesSection.Data)
597 .Case("apple_types", &AppleTypesSection.Data)
598 .Case("apple_namespaces", &AppleNamespacesSection.Data)
599 .Case("apple_namespac", &AppleNamespacesSection.Data)
600 .Case("apple_objc", &AppleObjCSection.Data)
601 // Any more debug info sections go here.
605 if (name == "debug_ranges") {
606 // FIXME: Use the other dwo range section when we emit it.
607 RangeDWOSection = data;
609 } else if (name == "debug_types") {
610 // Find debug_types data by section rather than name as there are
611 // multiple, comdat grouped, debug_types sections.
612 TypesSections[Section].Data = data;
613 } else if (name == "debug_types.dwo") {
614 TypesDWOSections[Section].Data = data;
617 section_iterator RelocatedSection = Section.getRelocatedSection();
618 if (RelocatedSection == Obj.section_end())
621 StringRef RelSecName;
622 RelocatedSection->getName(RelSecName);
623 RelSecName = RelSecName.substr(
624 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
626 // TODO: Add support for relocations in other sections as needed.
627 // Record relocations for the debug_info and debug_line sections.
628 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
629 .Case("debug_info", &InfoSection.Relocs)
630 .Case("debug_loc", &LocSection.Relocs)
631 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
632 .Case("debug_line", &LineSection.Relocs)
633 .Case("apple_names", &AppleNamesSection.Relocs)
634 .Case("apple_types", &AppleTypesSection.Relocs)
635 .Case("apple_namespaces", &AppleNamespacesSection.Relocs)
636 .Case("apple_namespac", &AppleNamespacesSection.Relocs)
637 .Case("apple_objc", &AppleObjCSection.Relocs)
640 // Find debug_types relocs by section rather than name as there are
641 // multiple, comdat grouped, debug_types sections.
642 if (RelSecName == "debug_types")
643 Map = &TypesSections[*RelocatedSection].Relocs;
644 else if (RelSecName == "debug_types.dwo")
645 Map = &TypesDWOSections[*RelocatedSection].Relocs;
650 if (Section.relocation_begin() != Section.relocation_end()) {
651 uint64_t SectionSize = RelocatedSection->getSize();
652 for (const RelocationRef &Reloc : Section.relocations()) {
654 Reloc.getOffset(Address);
657 uint64_t SymAddr = 0;
658 object::symbol_iterator Sym = Reloc.getSymbol();
659 if (Sym != Obj.symbol_end())
660 Sym->getAddress(SymAddr);
662 object::RelocVisitor V(Obj);
663 object::RelocToApply R(V.visit(Type, Reloc, SymAddr));
665 SmallString<32> Name;
666 std::error_code ec(Reloc.getTypeName(Name));
668 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
670 errs() << "error: failed to compute relocation: "
675 if (Address + R.Width > SectionSize) {
676 errs() << "error: " << R.Width << "-byte relocation starting "
677 << Address << " bytes into section " << name << " which is "
678 << SectionSize << " bytes long.\n";
682 errs() << "error: can't handle a relocation of more than 8 bytes at "
686 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
687 << " at " << format("%p", Address)
688 << " with width " << format("%d", R.Width)
690 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
696 void DWARFContextInMemory::anchor() { }