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 "DWARFDebugArangeSet.h"
12 #include "DWARFAcceleratorTable.h"
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/Support/Compression.h"
17 #include "llvm/Support/Dwarf.h"
18 #include "llvm/Support/Format.h"
19 #include "llvm/Support/Path.h"
20 #include "llvm/Support/raw_ostream.h"
23 using namespace dwarf;
24 using namespace object;
26 #define DEBUG_TYPE "dwarf"
28 typedef DWARFDebugLine::LineTable DWARFLineTable;
29 typedef DILineInfoSpecifier::FileLineInfoKind FileLineInfoKind;
30 typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
32 static void dumpPubSection(raw_ostream &OS, StringRef Name, StringRef Data,
33 bool LittleEndian, bool GnuStyle) {
34 OS << "\n." << Name << " contents:\n";
35 DataExtractor pubNames(Data, LittleEndian, 0);
37 while (pubNames.isValidOffset(offset)) {
38 OS << "length = " << format("0x%08x", pubNames.getU32(&offset));
39 OS << " version = " << format("0x%04x", pubNames.getU16(&offset));
40 OS << " unit_offset = " << format("0x%08x", pubNames.getU32(&offset));
41 OS << " unit_size = " << format("0x%08x", pubNames.getU32(&offset)) << '\n';
43 OS << "Offset Linkage Kind Name\n";
45 OS << "Offset Name\n";
47 while (offset < Data.size()) {
48 uint32_t dieRef = pubNames.getU32(&offset);
51 OS << format("0x%8.8x ", dieRef);
53 PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
54 OS << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
55 << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
58 OS << '\"' << pubNames.getCStr(&offset) << "\"\n";
63 static void dumpAccelSection(raw_ostream &OS, StringRef Name,
64 const DWARFSection& Section, StringRef StringSection,
66 DataExtractor AccelSection(Section.Data, LittleEndian, 0);
67 DataExtractor StrData(StringSection, LittleEndian, 0);
68 OS << "\n." << Name << " contents:\n";
69 DWARFAcceleratorTable Accel(AccelSection, StrData, Section.Relocs);
75 void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
76 if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
77 OS << ".debug_abbrev contents:\n";
78 getDebugAbbrev()->dump(OS);
81 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo)
82 if (const DWARFDebugAbbrev *D = getDebugAbbrevDWO()) {
83 OS << "\n.debug_abbrev.dwo contents:\n";
87 if (DumpType == DIDT_All || DumpType == DIDT_Info) {
88 OS << "\n.debug_info contents:\n";
89 for (const auto &CU : compile_units())
93 if ((DumpType == DIDT_All || DumpType == DIDT_InfoDwo) &&
94 getNumDWOCompileUnits()) {
95 OS << "\n.debug_info.dwo contents:\n";
96 for (const auto &DWOCU : dwo_compile_units())
100 if ((DumpType == DIDT_All || DumpType == DIDT_Types) && getNumTypeUnits()) {
101 OS << "\n.debug_types contents:\n";
102 for (const auto &TUS : type_unit_sections())
103 for (const auto &TU : TUS)
107 if ((DumpType == DIDT_All || DumpType == DIDT_TypesDwo) &&
108 getNumDWOTypeUnits()) {
109 OS << "\n.debug_types.dwo contents:\n";
110 for (const auto &DWOTUS : dwo_type_unit_sections())
111 for (const auto &DWOTU : DWOTUS)
115 if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
116 OS << "\n.debug_loc contents:\n";
117 getDebugLoc()->dump(OS);
120 if (DumpType == DIDT_All || DumpType == DIDT_LocDwo) {
121 OS << "\n.debug_loc.dwo contents:\n";
122 getDebugLocDWO()->dump(OS);
125 if (DumpType == DIDT_All || DumpType == DIDT_Frames) {
126 OS << "\n.debug_frame contents:\n";
127 getDebugFrame()->dump(OS);
131 if (DumpType == DIDT_All || DumpType == DIDT_Aranges) {
132 OS << "\n.debug_aranges contents:\n";
133 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
134 DWARFDebugArangeSet set;
135 while (set.extract(arangesData, &offset))
139 uint8_t savedAddressByteSize = 0;
140 if (DumpType == DIDT_All || DumpType == DIDT_Line) {
141 OS << "\n.debug_line contents:\n";
142 for (const auto &CU : compile_units()) {
143 savedAddressByteSize = CU->getAddressByteSize();
144 unsigned stmtOffset =
145 CU->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
146 CU.get(), DW_AT_stmt_list, -1U);
147 if (stmtOffset != -1U) {
148 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
149 savedAddressByteSize);
150 DWARFDebugLine::LineTable LineTable;
151 LineTable.parse(lineData, &getLineSection().Relocs, &stmtOffset);
157 if (DumpType == DIDT_All || DumpType == DIDT_LineDwo) {
158 OS << "\n.debug_line.dwo contents:\n";
159 unsigned stmtOffset = 0;
160 DataExtractor lineData(getLineDWOSection().Data, isLittleEndian(),
161 savedAddressByteSize);
162 DWARFDebugLine::LineTable LineTable;
163 while (LineTable.Prologue.parse(lineData, &stmtOffset)) {
169 if (DumpType == DIDT_All || DumpType == DIDT_Str) {
170 OS << "\n.debug_str contents:\n";
171 DataExtractor strData(getStringSection(), isLittleEndian(), 0);
173 uint32_t strOffset = 0;
174 while (const char *s = strData.getCStr(&offset)) {
175 OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
180 if ((DumpType == DIDT_All || DumpType == DIDT_StrDwo) &&
181 !getStringDWOSection().empty()) {
182 OS << "\n.debug_str.dwo contents:\n";
183 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
185 uint32_t strDWOOffset = 0;
186 while (const char *s = strDWOData.getCStr(&offset)) {
187 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
188 strDWOOffset = offset;
192 if (DumpType == DIDT_All || DumpType == DIDT_Ranges) {
193 OS << "\n.debug_ranges contents:\n";
194 // In fact, different compile units may have different address byte
195 // sizes, but for simplicity we just use the address byte size of the last
196 // compile unit (there is no easy and fast way to associate address range
197 // list and the compile unit it describes).
198 DataExtractor rangesData(getRangeSection(), isLittleEndian(),
199 savedAddressByteSize);
201 DWARFDebugRangeList rangeList;
202 while (rangeList.extract(rangesData, &offset))
206 if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
207 dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
208 isLittleEndian(), false);
210 if (DumpType == DIDT_All || DumpType == DIDT_Pubtypes)
211 dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
212 isLittleEndian(), false);
214 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
215 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
216 isLittleEndian(), true /* GnuStyle */);
218 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
219 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
220 isLittleEndian(), true /* GnuStyle */);
222 if ((DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo) &&
223 !getStringOffsetDWOSection().empty()) {
224 OS << "\n.debug_str_offsets.dwo contents:\n";
225 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(),
228 uint64_t size = getStringOffsetDWOSection().size();
229 while (offset < size) {
230 OS << format("0x%8.8x: ", offset);
231 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
235 if (DumpType == DIDT_All || DumpType == DIDT_AppleNames)
236 dumpAccelSection(OS, "apple_names", getAppleNamesSection(),
237 getStringSection(), isLittleEndian());
239 if (DumpType == DIDT_All || DumpType == DIDT_AppleTypes)
240 dumpAccelSection(OS, "apple_types", getAppleTypesSection(),
241 getStringSection(), isLittleEndian());
243 if (DumpType == DIDT_All || DumpType == DIDT_AppleNamespaces)
244 dumpAccelSection(OS, "apple_namespaces", getAppleNamespacesSection(),
245 getStringSection(), isLittleEndian());
247 if (DumpType == DIDT_All || DumpType == DIDT_AppleObjC)
248 dumpAccelSection(OS, "apple_objc", getAppleObjCSection(),
249 getStringSection(), isLittleEndian());
252 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
256 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
258 Abbrev.reset(new DWARFDebugAbbrev());
259 Abbrev->extract(abbrData);
263 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
265 return AbbrevDWO.get();
267 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
268 AbbrevDWO.reset(new DWARFDebugAbbrev());
269 AbbrevDWO->extract(abbrData);
270 return AbbrevDWO.get();
273 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
277 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
278 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
279 // assume all compile units have the same address byte size
280 if (getNumCompileUnits())
281 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
285 const DWARFDebugLocDWO *DWARFContext::getDebugLocDWO() {
289 DataExtractor LocData(getLocDWOSection().Data, isLittleEndian(), 0);
290 LocDWO.reset(new DWARFDebugLocDWO());
291 LocDWO->parse(LocData);
295 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
297 return Aranges.get();
299 Aranges.reset(new DWARFDebugAranges());
300 Aranges->generate(this);
301 return Aranges.get();
304 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
306 return DebugFrame.get();
308 // There's a "bug" in the DWARFv3 standard with respect to the target address
309 // size within debug frame sections. While DWARF is supposed to be independent
310 // of its container, FDEs have fields with size being "target address size",
311 // which isn't specified in DWARF in general. It's only specified for CUs, but
312 // .eh_frame can appear without a .debug_info section. Follow the example of
313 // other tools (libdwarf) and extract this from the container (ObjectFile
314 // provides this information). This problem is fixed in DWARFv4
315 // See this dwarf-discuss discussion for more details:
316 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
317 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
319 DebugFrame.reset(new DWARFDebugFrame());
320 DebugFrame->parse(debugFrameData);
321 return DebugFrame.get();
324 const DWARFLineTable *
325 DWARFContext::getLineTableForUnit(DWARFUnit *cu) {
327 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
329 unsigned stmtOffset =
330 cu->getCompileUnitDIE()->getAttributeValueAsSectionOffset(
331 cu, DW_AT_stmt_list, -1U);
332 if (stmtOffset == -1U)
333 return nullptr; // No line table for this compile unit.
335 // See if the line table is cached.
336 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
339 // We have to parse it first.
340 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
341 cu->getAddressByteSize());
342 return Line->getOrParseLineTable(lineData, stmtOffset);
345 void DWARFContext::parseCompileUnits() {
346 CUs.parse(*this, getInfoSection());
349 void DWARFContext::parseTypeUnits() {
352 for (const auto &I : getTypesSections()) {
353 TUs.push_back(DWARFUnitSection<DWARFTypeUnit>());
354 TUs.back().parse(*this, I.second);
358 void DWARFContext::parseDWOCompileUnits() {
359 DWOCUs.parseDWO(*this, getInfoDWOSection());
362 void DWARFContext::parseDWOTypeUnits() {
365 for (const auto &I : getTypesDWOSections()) {
366 DWOTUs.push_back(DWARFUnitSection<DWARFTypeUnit>());
367 DWOTUs.back().parseDWO(*this, I.second);
371 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
373 return CUs.getUnitForOffset(Offset);
376 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
377 // First, get the offset of the compile unit.
378 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
379 // Retrieve the compile unit.
380 return getCompileUnitForOffset(CUOffset);
383 static bool getFunctionNameForAddress(DWARFCompileUnit *CU, uint64_t Address,
384 FunctionNameKind Kind,
385 std::string &FunctionName) {
386 if (Kind == FunctionNameKind::None)
388 // The address may correspond to instruction in some inlined function,
389 // so we have to build the chain of inlined functions and take the
390 // name of the topmost function in it.
391 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
392 CU->getInlinedChainForAddress(Address);
393 if (InlinedChain.DIEs.size() == 0)
395 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
396 if (const char *Name =
397 TopFunctionDIE.getSubroutineName(InlinedChain.U, Kind)) {
404 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
405 DILineInfoSpecifier Spec) {
408 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
411 getFunctionNameForAddress(CU, Address, Spec.FNKind, Result.FunctionName);
412 if (Spec.FLIKind != FileLineInfoKind::None) {
413 if (const DWARFLineTable *LineTable = getLineTableForUnit(CU))
414 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
415 Spec.FLIKind, Result);
421 DWARFContext::getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
422 DILineInfoSpecifier Spec) {
423 DILineInfoTable Lines;
424 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
428 std::string FunctionName = "<invalid>";
429 getFunctionNameForAddress(CU, Address, Spec.FNKind, FunctionName);
431 // If the Specifier says we don't need FileLineInfo, just
432 // return the top-most function at the starting address.
433 if (Spec.FLIKind == FileLineInfoKind::None) {
435 Result.FunctionName = FunctionName;
436 Lines.push_back(std::make_pair(Address, Result));
440 const DWARFLineTable *LineTable = getLineTableForUnit(CU);
442 // Get the index of row we're looking for in the line table.
443 std::vector<uint32_t> RowVector;
444 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
447 for (uint32_t RowIndex : RowVector) {
448 // Take file number and line/column from the row.
449 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
451 LineTable->getFileNameByIndex(Row.File, CU->getCompilationDir(),
452 Spec.FLIKind, Result.FileName);
453 Result.FunctionName = FunctionName;
454 Result.Line = Row.Line;
455 Result.Column = Row.Column;
456 Lines.push_back(std::make_pair(Row.Address, Result));
463 DWARFContext::getInliningInfoForAddress(uint64_t Address,
464 DILineInfoSpecifier Spec) {
465 DIInliningInfo InliningInfo;
467 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
471 const DWARFLineTable *LineTable = nullptr;
472 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
473 CU->getInlinedChainForAddress(Address);
474 if (InlinedChain.DIEs.size() == 0) {
475 // If there is no DIE for address (e.g. it is in unavailable .dwo file),
476 // try to at least get file/line info from symbol table.
477 if (Spec.FLIKind != FileLineInfoKind::None) {
479 LineTable = getLineTableForUnit(CU);
481 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
482 Spec.FLIKind, Frame))
483 InliningInfo.addFrame(Frame);
488 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
489 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
490 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
492 // Get function name if necessary.
493 if (const char *Name =
494 FunctionDIE.getSubroutineName(InlinedChain.U, Spec.FNKind))
495 Frame.FunctionName = Name;
496 if (Spec.FLIKind != FileLineInfoKind::None) {
498 // For the topmost frame, initialize the line table of this
499 // compile unit and fetch file/line info from it.
500 LineTable = getLineTableForUnit(CU);
501 // For the topmost routine, get file/line info from line table.
503 LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
504 Spec.FLIKind, Frame);
506 // Otherwise, use call file, call line and call column from
507 // previous DIE in inlined chain.
509 LineTable->getFileNameByIndex(CallFile, CU->getCompilationDir(),
510 Spec.FLIKind, Frame.FileName);
511 Frame.Line = CallLine;
512 Frame.Column = CallColumn;
514 // Get call file/line/column of a current DIE.
516 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
520 InliningInfo.addFrame(Frame);
525 static bool consumeCompressedDebugSectionHeader(StringRef &data,
526 uint64_t &OriginalSize) {
527 // Consume "ZLIB" prefix.
528 if (!data.startswith("ZLIB"))
530 data = data.substr(4);
531 // Consume uncompressed section size (big-endian 8 bytes).
532 DataExtractor extractor(data, false, 8);
534 OriginalSize = extractor.getU64(&Offset);
537 data = data.substr(Offset);
541 DWARFContextInMemory::DWARFContextInMemory(const object::ObjectFile &Obj)
542 : IsLittleEndian(Obj.isLittleEndian()),
543 AddressSize(Obj.getBytesInAddress()) {
544 for (const SectionRef &Section : Obj.sections()) {
546 Section.getName(name);
547 // Skip BSS and Virtual sections, they aren't interesting.
548 bool IsBSS = Section.isBSS();
551 bool IsVirtual = Section.isVirtual();
555 Section.getContents(data);
557 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
559 // Check if debug info section is compressed with zlib.
560 if (name.startswith("zdebug_")) {
561 uint64_t OriginalSize;
562 if (!zlib::isAvailable() ||
563 !consumeCompressedDebugSectionHeader(data, OriginalSize))
565 UncompressedSections.resize(UncompressedSections.size() + 1);
566 if (zlib::uncompress(data, UncompressedSections.back(), OriginalSize) !=
568 UncompressedSections.pop_back();
571 // Make data point to uncompressed section contents and save its contents.
572 name = name.substr(1);
573 data = UncompressedSections.back();
576 StringRef *SectionData =
577 StringSwitch<StringRef *>(name)
578 .Case("debug_info", &InfoSection.Data)
579 .Case("debug_abbrev", &AbbrevSection)
580 .Case("debug_loc", &LocSection.Data)
581 .Case("debug_line", &LineSection.Data)
582 .Case("debug_aranges", &ARangeSection)
583 .Case("debug_frame", &DebugFrameSection)
584 .Case("debug_str", &StringSection)
585 .Case("debug_ranges", &RangeSection)
586 .Case("debug_pubnames", &PubNamesSection)
587 .Case("debug_pubtypes", &PubTypesSection)
588 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
589 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
590 .Case("debug_info.dwo", &InfoDWOSection.Data)
591 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
592 .Case("debug_loc.dwo", &LocDWOSection.Data)
593 .Case("debug_line.dwo", &LineDWOSection.Data)
594 .Case("debug_str.dwo", &StringDWOSection)
595 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
596 .Case("debug_addr", &AddrSection)
597 .Case("apple_names", &AppleNamesSection.Data)
598 .Case("apple_types", &AppleTypesSection.Data)
599 .Case("apple_namespaces", &AppleNamespacesSection.Data)
600 .Case("apple_namespac", &AppleNamespacesSection.Data)
601 .Case("apple_objc", &AppleObjCSection.Data)
602 // Any more debug info sections go here.
606 if (name == "debug_ranges") {
607 // FIXME: Use the other dwo range section when we emit it.
608 RangeDWOSection = data;
610 } else if (name == "debug_types") {
611 // Find debug_types data by section rather than name as there are
612 // multiple, comdat grouped, debug_types sections.
613 TypesSections[Section].Data = data;
614 } else if (name == "debug_types.dwo") {
615 TypesDWOSections[Section].Data = data;
618 section_iterator RelocatedSection = Section.getRelocatedSection();
619 if (RelocatedSection == Obj.section_end())
622 StringRef RelSecName;
623 RelocatedSection->getName(RelSecName);
624 RelSecName = RelSecName.substr(
625 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
627 // TODO: Add support for relocations in other sections as needed.
628 // Record relocations for the debug_info and debug_line sections.
629 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
630 .Case("debug_info", &InfoSection.Relocs)
631 .Case("debug_loc", &LocSection.Relocs)
632 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
633 .Case("debug_line", &LineSection.Relocs)
634 .Case("apple_names", &AppleNamesSection.Relocs)
635 .Case("apple_types", &AppleTypesSection.Relocs)
636 .Case("apple_namespaces", &AppleNamespacesSection.Relocs)
637 .Case("apple_namespac", &AppleNamespacesSection.Relocs)
638 .Case("apple_objc", &AppleObjCSection.Relocs)
641 // Find debug_types relocs by section rather than name as there are
642 // multiple, comdat grouped, debug_types sections.
643 if (RelSecName == "debug_types")
644 Map = &TypesSections[*RelocatedSection].Relocs;
645 else if (RelSecName == "debug_types.dwo")
646 Map = &TypesDWOSections[*RelocatedSection].Relocs;
651 if (Section.relocation_begin() != Section.relocation_end()) {
652 uint64_t SectionSize = RelocatedSection->getSize();
653 for (const RelocationRef &Reloc : Section.relocations()) {
655 Reloc.getOffset(Address);
658 uint64_t SymAddr = 0;
659 object::symbol_iterator Sym = Reloc.getSymbol();
660 if (Sym != Obj.symbol_end())
661 Sym->getAddress(SymAddr);
663 object::RelocVisitor V(Obj);
664 object::RelocToApply R(V.visit(Type, Reloc, SymAddr));
666 SmallString<32> Name;
667 std::error_code ec(Reloc.getTypeName(Name));
669 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
671 errs() << "error: failed to compute relocation: "
676 if (Address + R.Width > SectionSize) {
677 errs() << "error: " << R.Width << "-byte relocation starting "
678 << Address << " bytes into section " << name << " which is "
679 << SectionSize << " bytes long.\n";
683 errs() << "error: can't handle a relocation of more than 8 bytes at "
687 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
688 << " at " << format("%p", Address)
689 << " with width " << format("%d", R.Width)
691 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
697 void DWARFContextInMemory::anchor() { }