#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
+#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/DataExtractor.h"
-#include "llvm/Support/Options.h"
#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Options.h"
#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
-#include <memory>
#include <list>
+#include <memory>
#include <unordered_set>
using namespace llvm;
static list<std::string> InputFiles(Positional, OneOrMore,
desc("<input files>"), cat(DwpCategory));
-static opt<std::string> OutputFilename(Required, "o", desc("Specify the output file."),
- value_desc("filename"), cat(DwpCategory));
+static opt<std::string> OutputFilename(Required, "o",
+ desc("Specify the output file."),
+ value_desc("filename"),
+ cat(DwpCategory));
static int error(const Twine &Error, const Twine &Context) {
errs() << Twine("while processing ") + Context + ":\n";
return std::error_code();
}
+static uint32_t getCUAbbrev(StringRef Abbrev, uint64_t AbbrCode) {
+ uint64_t CurCode;
+ uint32_t Offset = 0;
+ DataExtractor AbbrevData(Abbrev, true, 0);
+ while ((CurCode = AbbrevData.getULEB128(&Offset)) != AbbrCode) {
+ // Tag
+ AbbrevData.getULEB128(&Offset);
+ // DW_CHILDREN
+ AbbrevData.getU8(&Offset);
+ // Attributes
+ while (AbbrevData.getULEB128(&Offset) | AbbrevData.getULEB128(&Offset))
+ ;
+ }
+ return Offset;
+}
+
+static uint64_t getCUSignature(StringRef Abbrev, StringRef Info) {
+ uint32_t Offset = 0;
+ DataExtractor InfoData(Info, true, 0);
+ InfoData.getU32(&Offset); // Length
+ uint16_t Version = InfoData.getU16(&Offset);
+ InfoData.getU32(&Offset); // Abbrev offset (should be zero)
+ uint8_t AddrSize = InfoData.getU8(&Offset);
+
+ uint32_t AbbrCode = InfoData.getULEB128(&Offset);
+
+ DataExtractor AbbrevData(Abbrev, true, 0);
+ uint32_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode);
+ uint64_t Tag = AbbrevData.getULEB128(&AbbrevOffset);
+ (void)Tag;
+ // FIXME: Real error handling
+ assert(Tag == dwarf::DW_TAG_compile_unit);
+ // DW_CHILDREN
+ AbbrevData.getU8(&AbbrevOffset);
+ uint32_t Name;
+ uint32_t Form;
+ while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) |
+ (Form = AbbrevData.getULEB128(&AbbrevOffset)) &&
+ Name != dwarf::DW_AT_GNU_dwo_id) {
+ DWARFFormValue::skipValue(Form, InfoData, &Offset, Version, AddrSize);
+ }
+ // FIXME: Real error handling
+ assert(Name == dwarf::DW_AT_GNU_dwo_id);
+ return InfoData.getU64(&Offset);
+}
+
+struct UnitIndexEntry {
+ uint64_t Signature;
+ DWARFUnitIndex::Entry::SectionContribution Contributions[8];
+};
+
+static void addAllTypes(std::vector<UnitIndexEntry> &TypeIndexEntries,
+ uint32_t OutTypesOffset, StringRef Types,
+ const UnitIndexEntry &CUEntry) {
+ uint32_t Offset = 0;
+ DataExtractor Data(Types, true, 0);
+ while (Data.isValidOffset(Offset)) {
+ TypeIndexEntries.push_back(CUEntry);
+ auto &Entry = TypeIndexEntries.back();
+ // Zero out the debug_info contribution
+ Entry.Contributions[0] = {};
+ auto &C = Entry.Contributions[DW_SECT_TYPES - DW_SECT_INFO];
+ C.Offset = OutTypesOffset + Offset;
+ auto PrevOffset = Offset;
+ // Length of the unit, including the 4 byte length field.
+ C.Length = Data.getU32(&Offset) + 4;
+
+ Data.getU16(&Offset); // Version
+ Data.getU32(&Offset); // Abbrev offset
+ Data.getU8(&Offset); // Address size
+ Entry.Signature = Data.getU64(&Offset);
+ Offset = PrevOffset + C.Length;
+ }
+}
+
+static void
+writeIndexTable(MCStreamer &Out, ArrayRef<unsigned> ContributionOffsets,
+ ArrayRef<UnitIndexEntry> IndexEntries,
+ uint32_t DWARFUnitIndex::Entry::SectionContribution::*Field) {
+ for (const auto &E : IndexEntries)
+ for (size_t i = 0; i != array_lengthof(E.Contributions); ++i)
+ if (ContributionOffsets[i])
+ Out.EmitIntValue(E.Contributions[i].*Field, 4);
+}
+
+static void writeIndex(MCStreamer &Out, MCSection *Section,
+ ArrayRef<unsigned> ContributionOffsets,
+ ArrayRef<UnitIndexEntry> IndexEntries) {
+ unsigned Columns = 0;
+ for (auto &C : ContributionOffsets)
+ if (C)
+ ++Columns;
+
+ std::vector<unsigned> Buckets(NextPowerOf2(3 * IndexEntries.size() / 2));
+ uint64_t Mask = Buckets.size() - 1;
+ for (size_t i = 0; i != IndexEntries.size(); ++i) {
+ auto S = IndexEntries[i].Signature;
+ auto H = S & Mask;
+ while (Buckets[H])
+ H += ((S >> 32) & Mask) | 1;
+ Buckets[H] = i + 1;
+ }
+
+ Out.SwitchSection(Section);
+ Out.EmitIntValue(2, 4); // Version
+ Out.EmitIntValue(Columns, 4); // Columns
+ Out.EmitIntValue(IndexEntries.size(), 4); // Num Units
+ Out.EmitIntValue(Buckets.size(), 4); // Num Buckets
+
+ // Write the signatures.
+ for (const auto &I : Buckets)
+ Out.EmitIntValue(I ? IndexEntries[I - 1].Signature : 0, 8);
+
+ // Write the indexes.
+ for (const auto &I : Buckets)
+ Out.EmitIntValue(I, 4);
+
+ // Write the column headers (which sections will appear in the table)
+ for (size_t i = 0; i != ContributionOffsets.size(); ++i)
+ if (ContributionOffsets[i])
+ Out.EmitIntValue(i + DW_SECT_INFO, 4);
+
+ // Write the offsets.
+ writeIndexTable(Out, ContributionOffsets, IndexEntries,
+ &DWARFUnitIndex::Entry::SectionContribution::Offset);
+
+ // Write the lengths.
+ writeIndexTable(Out, ContributionOffsets, IndexEntries,
+ &DWARFUnitIndex::Entry::SectionContribution::Length);
+}
static std::error_code write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
const auto &MCOFI = *Out.getContext().getObjectFileInfo();
MCSection *const StrSection = MCOFI.getDwarfStrDWOSection();
{"debug_str_offsets.dwo", {StrOffsetSection, DW_SECT_STR_OFFSETS}},
{"debug_str.dwo", {StrSection, static_cast<DWARFSectionKind>(0)}},
{"debug_loc.dwo", {MCOFI.getDwarfLocDWOSection(), DW_SECT_LOC}},
+ {"debug_line.dwo", {MCOFI.getDwarfLineDWOSection(), DW_SECT_LINE}},
{"debug_abbrev.dwo", {MCOFI.getDwarfAbbrevDWOSection(), DW_SECT_ABBREV}}};
- struct UnitIndexEntry {
- uint64_t Signature;
- DWARFUnitIndex::Entry::SectionContribution Contributions[8];
- };
-
std::vector<UnitIndexEntry> IndexEntries;
+ std::vector<UnitIndexEntry> TypeIndexEntries;
StringMap<uint32_t> Strings;
uint32_t StringOffset = 0;
- uint64_t UnitIndex = 0;
uint32_t ContributionOffsets[8] = {};
for (const auto &Input : Inputs) {
IndexEntries.emplace_back();
UnitIndexEntry &CurEntry = IndexEntries.back();
- CurEntry.Signature = UnitIndex++;
StringRef CurStrSection;
StringRef CurStrOffsetSection;
+ StringRef InfoSection;
+ StringRef AbbrevSection;
+ StringRef TypesSection;
+
+ auto TypesOffset = ContributionOffsets[DW_SECT_TYPES - DW_SECT_INFO];
for (const auto &Section : ErrOrObj->getBinary()->sections()) {
StringRef Name;
CurEntry.Contributions[Index].Offset = ContributionOffsets[Index];
ContributionOffsets[Index] +=
(CurEntry.Contributions[Index].Length = Contents.size());
+
+ switch (Kind) {
+ case DW_SECT_INFO:
+ InfoSection = Contents;
+ break;
+ case DW_SECT_ABBREV:
+ AbbrevSection = Contents;
+ break;
+ case DW_SECT_TYPES:
+ TypesSection = Contents;
+ break;
+ default:
+ break;
+ }
}
MCSection *OutSection = SectionPair->second.first;
}
}
+ assert(!AbbrevSection.empty());
+ assert(!InfoSection.empty());
+ CurEntry.Signature = getCUSignature(AbbrevSection, InfoSection);
+ addAllTypes(TypeIndexEntries, TypesOffset, TypesSection, CurEntry);
+
if (auto Err = writeStringsAndOffsets(Out, Strings, StringOffset,
StrSection, StrOffsetSection,
CurStrSection, CurStrOffsetSection))
return Err;
}
- Out.SwitchSection(MCOFI.getDwarfCUIndexSection());
- Out.EmitIntValue(2, 4); // Version
- Out.EmitIntValue(8, 4); // Columns
- Out.EmitIntValue(IndexEntries.size(), 4); // Num Units
- // FIXME: This is not the right number of buckets for a real hash.
- Out.EmitIntValue(IndexEntries.size(), 4); // Num Buckets
-
- // Write the signatures.
- for (const auto &E : IndexEntries)
- Out.EmitIntValue(E.Signature, 8);
-
- // Write the indexes.
- for (size_t i = 0; i != IndexEntries.size(); ++i)
- Out.EmitIntValue(i + 1, 4);
+ // Lie about there being no info contributions so the TU index only includes
+ // the type unit contribution
+ ContributionOffsets[0] = 0;
+ writeIndex(Out, MCOFI.getDwarfTUIndexSection(), ContributionOffsets,
+ TypeIndexEntries);
- // Write the column headers (which sections will appear in the table)
- for (size_t i = 1; i != 9; ++i)
- Out.EmitIntValue(i, 4);
+ // Lie about the type contribution
+ ContributionOffsets[DW_SECT_TYPES - DW_SECT_INFO] = 0;
+ // Unlie about the info contribution
+ ContributionOffsets[0] = 1;
- // Write the offsets.
- for (const auto &E : IndexEntries)
- for (const auto &C : E.Contributions)
- Out.EmitIntValue(C.Offset, 4);
-
- // Write the lengths.
- for (const auto &E : IndexEntries)
- for (const auto &C : E.Contributions)
- Out.EmitIntValue(C.Length, 4);
+ writeIndex(Out, MCOFI.getDwarfCUIndexSection(), ContributionOffsets,
+ IndexEntries);
return std::error_code();
}
-int main(int argc, char** argv) {
+int main(int argc, char **argv) {
ParseCommandLineOptions(argc, argv, "merge split dwarf (.dwo) files");
MCObjectFileInfo MOFI;
MCContext MC(MAI.get(), MRI.get(), &MOFI);
- MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default,
- MC);
+ MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default, MC);
auto MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, "");
if (!MAB)
projects / oota-llvm.git / blobdiff