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);
49 OS << format("0x%8.8x ", dieRef);
51 PubIndexEntryDescriptor desc(pubNames.getU8(&offset));
52 OS << format("%-8s", dwarf::GDBIndexEntryLinkageString(desc.Linkage))
53 << ' ' << format("%-8s", dwarf::GDBIndexEntryKindString(desc.Kind))
56 OS << '\"' << pubNames.getCStr(&offset) << "\"\n";
60 void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
61 if (DumpType == DIDT_All || DumpType == DIDT_Abbrev) {
62 OS << ".debug_abbrev contents:\n";
63 getDebugAbbrev()->dump(OS);
66 if (DumpType == DIDT_All || DumpType == DIDT_Info) {
67 OS << "\n.debug_info contents:\n";
68 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i)
69 getCompileUnitAtIndex(i)->dump(OS);
72 if (DumpType == DIDT_All || DumpType == DIDT_Types) {
73 OS << "\n.debug_types contents:\n";
74 for (unsigned i = 0, e = getNumTypeUnits(); i != e; ++i)
75 getTypeUnitAtIndex(i)->dump(OS);
78 if (DumpType == DIDT_All || DumpType == DIDT_Loc) {
79 OS << "\n.debug_loc contents:\n";
80 getDebugLoc()->dump(OS);
83 if (DumpType == DIDT_All || DumpType == DIDT_Frames) {
84 OS << "\n.debug_frame contents:\n";
85 getDebugFrame()->dump(OS);
89 if (DumpType == DIDT_All || DumpType == DIDT_Aranges) {
90 OS << "\n.debug_aranges contents:\n";
91 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
92 DWARFDebugArangeSet set;
93 while (set.extract(arangesData, &offset))
97 uint8_t savedAddressByteSize = 0;
98 if (DumpType == DIDT_All || DumpType == DIDT_Line) {
99 OS << "\n.debug_line contents:\n";
100 for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i) {
101 DWARFCompileUnit *cu = getCompileUnitAtIndex(i);
102 savedAddressByteSize = cu->getAddressByteSize();
103 unsigned stmtOffset =
104 cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
106 if (stmtOffset != -1U) {
107 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
108 savedAddressByteSize);
109 DWARFDebugLine::DumpingState state(OS);
110 DWARFDebugLine::parseStatementTable(lineData, &getLineSection().Relocs, &stmtOffset, state);
115 if (DumpType == DIDT_All || DumpType == DIDT_Str) {
116 OS << "\n.debug_str contents:\n";
117 DataExtractor strData(getStringSection(), isLittleEndian(), 0);
119 uint32_t strOffset = 0;
120 while (const char *s = strData.getCStr(&offset)) {
121 OS << format("0x%8.8x: \"%s\"\n", strOffset, s);
126 if (DumpType == DIDT_All || DumpType == DIDT_Ranges) {
127 OS << "\n.debug_ranges contents:\n";
128 // In fact, different compile units may have different address byte
129 // sizes, but for simplicity we just use the address byte size of the last
130 // compile unit (there is no easy and fast way to associate address range
131 // list and the compile unit it describes).
132 DataExtractor rangesData(getRangeSection(), isLittleEndian(),
133 savedAddressByteSize);
135 DWARFDebugRangeList rangeList;
136 while (rangeList.extract(rangesData, &offset))
140 if (DumpType == DIDT_All || DumpType == DIDT_Pubnames)
141 dumpPubSection(OS, "debug_pubnames", getPubNamesSection(),
142 isLittleEndian(), false);
144 if (DumpType == DIDT_All || DumpType == DIDT_Pubtypes)
145 dumpPubSection(OS, "debug_pubtypes", getPubTypesSection(),
146 isLittleEndian(), false);
148 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubnames)
149 dumpPubSection(OS, "debug_gnu_pubnames", getGnuPubNamesSection(),
150 isLittleEndian(), true /* GnuStyle */);
152 if (DumpType == DIDT_All || DumpType == DIDT_GnuPubtypes)
153 dumpPubSection(OS, "debug_gnu_pubtypes", getGnuPubTypesSection(),
154 isLittleEndian(), true /* GnuStyle */);
156 if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo) {
157 const DWARFDebugAbbrev *D = getDebugAbbrevDWO();
159 OS << "\n.debug_abbrev.dwo contents:\n";
160 getDebugAbbrevDWO()->dump(OS);
164 if (DumpType == DIDT_All || DumpType == DIDT_InfoDwo)
165 if (getNumDWOCompileUnits()) {
166 OS << "\n.debug_info.dwo contents:\n";
167 for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
168 getDWOCompileUnitAtIndex(i)->dump(OS);
171 if (DumpType == DIDT_All || DumpType == DIDT_StrDwo)
172 if (!getStringDWOSection().empty()) {
173 OS << "\n.debug_str.dwo contents:\n";
174 DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
176 uint32_t strDWOOffset = 0;
177 while (const char *s = strDWOData.getCStr(&offset)) {
178 OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
179 strDWOOffset = offset;
183 if (DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo)
184 if (!getStringOffsetDWOSection().empty()) {
185 OS << "\n.debug_str_offsets.dwo contents:\n";
186 DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(), 0);
188 uint64_t size = getStringOffsetDWOSection().size();
189 while (offset < size) {
190 OS << format("0x%8.8x: ", offset);
191 OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
196 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
200 DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
202 Abbrev.reset(new DWARFDebugAbbrev());
203 Abbrev->parse(abbrData);
207 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrevDWO() {
209 return AbbrevDWO.get();
211 DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
212 AbbrevDWO.reset(new DWARFDebugAbbrev());
213 AbbrevDWO->parse(abbrData);
214 return AbbrevDWO.get();
217 const DWARFDebugLoc *DWARFContext::getDebugLoc() {
221 DataExtractor LocData(getLocSection().Data, isLittleEndian(), 0);
222 Loc.reset(new DWARFDebugLoc(getLocSection().Relocs));
223 // assume all compile units have the same address byte size
224 if (getNumCompileUnits())
225 Loc->parse(LocData, getCompileUnitAtIndex(0)->getAddressByteSize());
229 const DWARFDebugAranges *DWARFContext::getDebugAranges() {
231 return Aranges.get();
233 DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
235 Aranges.reset(new DWARFDebugAranges());
236 Aranges->extract(arangesData);
237 // Generate aranges from DIEs: even if .debug_aranges section is present,
238 // it may describe only a small subset of compilation units, so we need to
239 // manually build aranges for the rest of them.
240 Aranges->generate(this);
241 return Aranges.get();
244 const DWARFDebugFrame *DWARFContext::getDebugFrame() {
246 return DebugFrame.get();
248 // There's a "bug" in the DWARFv3 standard with respect to the target address
249 // size within debug frame sections. While DWARF is supposed to be independent
250 // of its container, FDEs have fields with size being "target address size",
251 // which isn't specified in DWARF in general. It's only specified for CUs, but
252 // .eh_frame can appear without a .debug_info section. Follow the example of
253 // other tools (libdwarf) and extract this from the container (ObjectFile
254 // provides this information). This problem is fixed in DWARFv4
255 // See this dwarf-discuss discussion for more details:
256 // http://lists.dwarfstd.org/htdig.cgi/dwarf-discuss-dwarfstd.org/2011-December/001173.html
257 DataExtractor debugFrameData(getDebugFrameSection(), isLittleEndian(),
259 DebugFrame.reset(new DWARFDebugFrame());
260 DebugFrame->parse(debugFrameData);
261 return DebugFrame.get();
264 const DWARFLineTable *
265 DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
267 Line.reset(new DWARFDebugLine(&getLineSection().Relocs));
269 unsigned stmtOffset =
270 cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
272 if (stmtOffset == -1U)
273 return 0; // No line table for this compile unit.
275 // See if the line table is cached.
276 if (const DWARFLineTable *lt = Line->getLineTable(stmtOffset))
279 // We have to parse it first.
280 DataExtractor lineData(getLineSection().Data, isLittleEndian(),
281 cu->getAddressByteSize());
282 return Line->getOrParseLineTable(lineData, stmtOffset);
285 void DWARFContext::parseCompileUnits() {
287 const DataExtractor &DIData = DataExtractor(getInfoSection().Data,
288 isLittleEndian(), 0);
289 while (DIData.isValidOffset(offset)) {
290 OwningPtr<DWARFCompileUnit> CU(new DWARFCompileUnit(
291 getDebugAbbrev(), getInfoSection().Data, getAbbrevSection(),
292 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
293 &getInfoSection().Relocs, isLittleEndian()));
294 if (!CU->extract(DIData, &offset)) {
297 CUs.push_back(CU.take());
298 offset = CUs.back()->getNextUnitOffset();
302 void DWARFContext::parseTypeUnits() {
303 const std::map<object::SectionRef, Section> &Sections = getTypesSections();
304 for (std::map<object::SectionRef, Section>::const_iterator
305 I = Sections.begin(),
309 const DataExtractor &DIData =
310 DataExtractor(I->second.Data, isLittleEndian(), 0);
311 while (DIData.isValidOffset(offset)) {
312 OwningPtr<DWARFTypeUnit> TU(new DWARFTypeUnit(
313 getDebugAbbrev(), I->second.Data, getAbbrevSection(),
314 getRangeSection(), getStringSection(), StringRef(), getAddrSection(),
315 &I->second.Relocs, isLittleEndian()));
316 if (!TU->extract(DIData, &offset))
318 TUs.push_back(TU.take());
319 offset = TUs.back()->getNextUnitOffset();
324 void DWARFContext::parseDWOCompileUnits() {
326 const DataExtractor &DIData =
327 DataExtractor(getInfoDWOSection().Data, isLittleEndian(), 0);
328 while (DIData.isValidOffset(offset)) {
329 OwningPtr<DWARFCompileUnit> DWOCU(new DWARFCompileUnit(
330 getDebugAbbrevDWO(), getInfoDWOSection().Data, getAbbrevDWOSection(),
331 getRangeDWOSection(), getStringDWOSection(),
332 getStringOffsetDWOSection(), getAddrSection(),
333 &getInfoDWOSection().Relocs, isLittleEndian()));
334 if (!DWOCU->extract(DIData, &offset)) {
337 DWOCUs.push_back(DWOCU.take());
338 offset = DWOCUs.back()->getNextUnitOffset();
343 struct OffsetComparator {
344 bool operator()(const DWARFCompileUnit *LHS,
345 const DWARFCompileUnit *RHS) const {
346 return LHS->getOffset() < RHS->getOffset();
348 bool operator()(const DWARFCompileUnit *LHS, uint32_t RHS) const {
349 return LHS->getOffset() < RHS;
351 bool operator()(uint32_t LHS, const DWARFCompileUnit *RHS) const {
352 return LHS < RHS->getOffset();
357 DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t Offset) {
361 DWARFCompileUnit **CU =
362 std::lower_bound(CUs.begin(), CUs.end(), Offset, OffsetComparator());
363 if (CU != CUs.end()) {
369 DWARFCompileUnit *DWARFContext::getCompileUnitForAddress(uint64_t Address) {
370 // First, get the offset of the compile unit.
371 uint32_t CUOffset = getDebugAranges()->findAddress(Address);
372 // Retrieve the compile unit.
373 return getCompileUnitForOffset(CUOffset);
376 static bool getFileNameForCompileUnit(DWARFCompileUnit *CU,
377 const DWARFLineTable *LineTable,
379 bool NeedsAbsoluteFilePath,
380 std::string &FileName) {
383 !LineTable->getFileNameByIndex(FileIndex, NeedsAbsoluteFilePath,
386 if (NeedsAbsoluteFilePath && sys::path::is_relative(FileName)) {
387 // We may still need to append compilation directory of compile unit.
388 SmallString<16> AbsolutePath;
389 if (const char *CompilationDir = CU->getCompilationDir()) {
390 sys::path::append(AbsolutePath, CompilationDir);
392 sys::path::append(AbsolutePath, FileName);
393 FileName = AbsolutePath.str();
398 static bool getFileLineInfoForCompileUnit(DWARFCompileUnit *CU,
399 const DWARFLineTable *LineTable,
401 bool NeedsAbsoluteFilePath,
402 std::string &FileName,
403 uint32_t &Line, uint32_t &Column) {
404 if (CU == 0 || LineTable == 0)
406 // Get the index of row we're looking for in the line table.
407 uint32_t RowIndex = LineTable->lookupAddress(Address);
410 // Take file number and line/column from the row.
411 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
412 if (!getFileNameForCompileUnit(CU, LineTable, Row.File,
413 NeedsAbsoluteFilePath, FileName))
420 DILineInfo DWARFContext::getLineInfoForAddress(uint64_t Address,
421 DILineInfoSpecifier Specifier) {
422 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
425 std::string FileName = "<invalid>";
426 std::string FunctionName = "<invalid>";
429 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
430 // The address may correspond to instruction in some inlined function,
431 // so we have to build the chain of inlined functions and take the
432 // name of the topmost function in it.
433 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
434 CU->getInlinedChainForAddress(Address);
435 if (InlinedChain.DIEs.size() > 0) {
436 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
437 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
441 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
442 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
443 const bool NeedsAbsoluteFilePath =
444 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
445 getFileLineInfoForCompileUnit(CU, LineTable, Address,
446 NeedsAbsoluteFilePath,
447 FileName, Line, Column);
449 return DILineInfo(StringRef(FileName), StringRef(FunctionName),
453 DILineInfoTable DWARFContext::getLineInfoForAddressRange(uint64_t Address,
455 DILineInfoSpecifier Specifier) {
456 DILineInfoTable Lines;
457 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
461 std::string FunctionName = "<invalid>";
462 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
463 // The address may correspond to instruction in some inlined function,
464 // so we have to build the chain of inlined functions and take the
465 // name of the topmost function in it.
466 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
467 CU->getInlinedChainForAddress(Address);
468 if (InlinedChain.DIEs.size() > 0) {
469 const DWARFDebugInfoEntryMinimal &TopFunctionDIE = InlinedChain.DIEs[0];
470 if (const char *Name = TopFunctionDIE.getSubroutineName(InlinedChain.U))
475 // If the Specifier says we don't need FileLineInfo, just
476 // return the top-most function at the starting address.
477 if (!Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
479 std::make_pair(Address, DILineInfo("<invalid>", FunctionName, 0, 0)));
483 const DWARFLineTable *LineTable = getLineTableForCompileUnit(CU);
484 const bool NeedsAbsoluteFilePath =
485 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
487 // Get the index of row we're looking for in the line table.
488 std::vector<uint32_t> RowVector;
489 if (!LineTable->lookupAddressRange(Address, Size, RowVector))
492 uint32_t NumRows = RowVector.size();
493 for (uint32_t i = 0; i < NumRows; ++i) {
494 uint32_t RowIndex = RowVector[i];
495 // Take file number and line/column from the row.
496 const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
497 std::string FileName = "<invalid>";
498 getFileNameForCompileUnit(CU, LineTable, Row.File,
499 NeedsAbsoluteFilePath, FileName);
500 Lines.push_back(std::make_pair(
501 Row.Address, DILineInfo(FileName, FunctionName, Row.Line, Row.Column)));
507 DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
508 DILineInfoSpecifier Specifier) {
509 DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
511 return DIInliningInfo();
513 const DWARFDebugInfoEntryInlinedChain &InlinedChain =
514 CU->getInlinedChainForAddress(Address);
515 if (InlinedChain.DIEs.size() == 0)
516 return DIInliningInfo();
518 DIInliningInfo InliningInfo;
519 uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
520 const DWARFLineTable *LineTable = 0;
521 for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
522 const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
523 std::string FileName = "<invalid>";
524 std::string FunctionName = "<invalid>";
527 // Get function name if necessary.
528 if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
529 if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
532 if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
533 const bool NeedsAbsoluteFilePath =
534 Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
536 // For the topmost frame, initialize the line table of this
537 // compile unit and fetch file/line info from it.
538 LineTable = getLineTableForCompileUnit(CU);
539 // For the topmost routine, get file/line info from line table.
540 getFileLineInfoForCompileUnit(CU, LineTable, Address,
541 NeedsAbsoluteFilePath,
542 FileName, Line, Column);
544 // Otherwise, use call file, call line and call column from
545 // previous DIE in inlined chain.
546 getFileNameForCompileUnit(CU, LineTable, CallFile,
547 NeedsAbsoluteFilePath, FileName);
551 // Get call file/line/column of a current DIE.
553 FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
557 DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
559 InliningInfo.addFrame(Frame);
564 static bool consumeCompressedDebugSectionHeader(StringRef &data,
565 uint64_t &OriginalSize) {
566 // Consume "ZLIB" prefix.
567 if (!data.startswith("ZLIB"))
569 data = data.substr(4);
570 // Consume uncompressed section size (big-endian 8 bytes).
571 DataExtractor extractor(data, false, 8);
573 OriginalSize = extractor.getU64(&Offset);
576 data = data.substr(Offset);
580 DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
581 IsLittleEndian(Obj->isLittleEndian()),
582 AddressSize(Obj->getBytesInAddress()) {
584 for (object::section_iterator i = Obj->begin_sections(),
585 e = Obj->end_sections();
586 i != e; i.increment(ec)) {
590 i->getContents(data);
592 name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
594 // Check if debug info section is compressed with zlib.
595 if (name.startswith("zdebug_")) {
596 uint64_t OriginalSize;
597 if (!zlib::isAvailable() ||
598 !consumeCompressedDebugSectionHeader(data, OriginalSize))
600 OwningPtr<MemoryBuffer> UncompressedSection;
601 if (zlib::uncompress(data, UncompressedSection, OriginalSize) !=
604 // Make data point to uncompressed section contents and save its contents.
605 name = name.substr(1);
606 data = UncompressedSection->getBuffer();
607 UncompressedSections.push_back(UncompressedSection.take());
611 StringSwitch<StringRef *>(name)
612 .Case("debug_info", &InfoSection.Data)
613 .Case("debug_abbrev", &AbbrevSection)
614 .Case("debug_loc", &LocSection.Data)
615 .Case("debug_line", &LineSection.Data)
616 .Case("debug_aranges", &ARangeSection)
617 .Case("debug_frame", &DebugFrameSection)
618 .Case("debug_str", &StringSection)
619 .Case("debug_ranges", &RangeSection)
620 .Case("debug_pubnames", &PubNamesSection)
621 .Case("debug_pubtypes", &PubTypesSection)
622 .Case("debug_gnu_pubnames", &GnuPubNamesSection)
623 .Case("debug_gnu_pubtypes", &GnuPubTypesSection)
624 .Case("debug_info.dwo", &InfoDWOSection.Data)
625 .Case("debug_abbrev.dwo", &AbbrevDWOSection)
626 .Case("debug_str.dwo", &StringDWOSection)
627 .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
628 .Case("debug_addr", &AddrSection)
629 // Any more debug info sections go here.
633 if (name == "debug_ranges") {
634 // FIXME: Use the other dwo range section when we emit it.
635 RangeDWOSection = data;
637 } else if (name == "debug_types") {
638 // Find debug_types data by section rather than name as there are
639 // multiple, comdat grouped, debug_types sections.
640 TypesSections[*i].Data = data;
643 section_iterator RelocatedSection = i->getRelocatedSection();
644 if (RelocatedSection == Obj->end_sections())
647 StringRef RelSecName;
648 RelocatedSection->getName(RelSecName);
649 RelSecName = RelSecName.substr(
650 RelSecName.find_first_not_of("._")); // Skip . and _ prefixes.
652 // TODO: Add support for relocations in other sections as needed.
653 // Record relocations for the debug_info and debug_line sections.
654 RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(RelSecName)
655 .Case("debug_info", &InfoSection.Relocs)
656 .Case("debug_loc", &LocSection.Relocs)
657 .Case("debug_info.dwo", &InfoDWOSection.Relocs)
658 .Case("debug_line", &LineSection.Relocs)
661 if (RelSecName != "debug_types")
663 // Find debug_types relocs by section rather than name as there are
664 // multiple, comdat grouped, debug_types sections.
665 Map = &TypesSections[*RelocatedSection].Relocs;
668 if (i->begin_relocations() != i->end_relocations()) {
669 uint64_t SectionSize;
670 RelocatedSection->getSize(SectionSize);
671 for (object::relocation_iterator reloc_i = i->begin_relocations(),
672 reloc_e = i->end_relocations();
673 reloc_i != reloc_e; reloc_i.increment(ec)) {
675 reloc_i->getOffset(Address);
677 reloc_i->getType(Type);
678 uint64_t SymAddr = 0;
679 // ELF relocations may need the symbol address
681 object::symbol_iterator Sym = reloc_i->getSymbol();
682 Sym->getAddress(SymAddr);
685 object::RelocVisitor V(Obj->getFileFormatName());
686 // The section address is always 0 for debug sections.
687 object::RelocToApply R(V.visit(Type, *reloc_i, 0, SymAddr));
689 SmallString<32> Name;
690 error_code ec(reloc_i->getTypeName(Name));
692 errs() << "Aaaaaa! Nameless relocation! Aaaaaa!\n";
694 errs() << "error: failed to compute relocation: "
699 if (Address + R.Width > SectionSize) {
700 errs() << "error: " << R.Width << "-byte relocation starting "
701 << Address << " bytes into section " << name << " which is "
702 << SectionSize << " bytes long.\n";
706 errs() << "error: can't handle a relocation of more than 8 bytes at "
710 DEBUG(dbgs() << "Writing " << format("%p", R.Value)
711 << " at " << format("%p", Address)
712 << " with width " << format("%d", R.Width)
714 Map->insert(std::make_pair(Address, std::make_pair(R.Width, R.Value)));
720 DWARFContextInMemory::~DWARFContextInMemory() {
721 DeleteContainerPointers(UncompressedSections);
724 void DWARFContextInMemory::anchor() { }